networkprotocols/tcpipv4v6prt/src/tcp_sap.cpp
author Pat Downey <patd@symbian.org>
Wed, 01 Sep 2010 12:33:58 +0100
branchRCL_3
changeset 58 8d540f55e491
parent 57 abbed5a4b42a
child 75 c1029e558ef5
permissions -rw-r--r--
Revert incorrect RCL_3 drop: Revision: 201035 Kit: 201035
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// Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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// tcp_sap.cpp - TCP service access point
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// TCP Service Access Point and most of the protocol logic.
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//
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/**
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 @file tcp_sap.cpp
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*/
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#include "tcp.h"
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#include <in6_dstcache.h>
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#include <in6_opt.h>
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#include <in6_if.h>
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#include <in6_dstcache_internal.h>
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#include <nifman_internal.h>
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#ifdef SYMBIAN_ADAPTIVE_TCP_RECEIVE_WINDOW
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#include <in_sock.h>
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#endif //SYMBIAN_ADAPTIVE_TCP_RECEIVE_WINDOW
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// speed optimisations
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#ifdef __ARMCC__
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#pragma push
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#pragma arm
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#endif
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#define SIGNED_UNSIGNED_FIX
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// Copied from ip6.cpp. Should move to some common definition file?
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static const TLitC8<sizeof(TInt)> KInetOptionDisable = {sizeof(TInt), {0}};
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#define SYMBIAN_NETWORKING_UPS
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//
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//
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// TCP state diagram from RFC793
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//
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//
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//                              +---------+ ---------\      active OPEN
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//                              |  CLOSED |            \    -----------
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//                              +---------+<---------\   \   create TCB
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//                                |     ^              \   \  snd SYN
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//                   passive OPEN |     |   CLOSE        \   \.
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//                   ------------ |     | ----------       \   \.
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//                    create TCB  |     | delete TCB         \   \.
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//                                V     |                      \   \.
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//                              +---------+            CLOSE    |    \.
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//                              |  LISTEN |          ---------- |     |
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//                              +---------+          delete TCB |     |
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//                   rcv SYN      |     |     SEND              |     |
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//                  -----------   |     |    -------            |     V
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// +---------+      snd SYN,ACK  /       \   snd SYN          +---------+
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// |         |<-----------------           ------------------>|         |
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// |   SYN   |                    rcv SYN                     |   SYN   |
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// |   RCVD  |<-----------------------------------------------|   SENT  |
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// |         |                    snd ACK                     |         |
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// |         |------------------           -------------------|         |
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// +---------+   rcv ACK of SYN  \       /  rcv SYN,ACK       +---------+
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//   |           --------------   |     |   -----------
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//   |                  x         |     |     snd ACK
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//   |                            V     V
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//   |  CLOSE                   +---------+
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//   | -------                  |  ESTAB  |
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//   | snd FIN                  +---------+
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//   |                   CLOSE    |     |    rcv FIN
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//   V                  -------   |     |    -------
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// +---------+          snd FIN  /       \   snd ACK          +---------+
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// |  FIN    |<-----------------           ------------------>|  CLOSE  |
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// | WAIT-1  |------------------                              |   WAIT  |
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// +---------+          rcv FIN  \                            +---------+
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//   | rcv ACK of FIN   -------   |                            CLOSE  |
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//   | --------------   snd ACK   |                           ------- |
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//   V        x                   V                           snd FIN V
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// +---------+                  +---------+                   +---------+
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// |FINWAIT-2|                  | CLOSING |                   | LAST-ACK|
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// +---------+                  +---------+                   +---------+
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//   |                rcv ACK of FIN |                 rcv ACK of FIN |
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//   |  rcv FIN       -------------- |    Timeout=2MSL -------------- |
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//   |  -------              x       V    ------------        x       V
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//    \ snd ACK                 +---------+delete TCB         +---------+
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//     ------------------------>|TIME WAIT|------------------>| CLOSED  |
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//                              +---------+                   +---------+
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//
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//  LISTEN - represents waiting for a connection request from any remote
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//  TCP and port.
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//
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//  SYN-SENT - represents waiting for a matching connection request
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//  after having sent a connection request.
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//
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//  SYN-RECEIVED - represents waiting for a confirming connection
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//  request acknowledgment after having both received and sent a
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//  connection request.
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//
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//  ESTABLISHED - represents an open connection, data received can be
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//  delivered to the user.  The normal state for the data transfer phase
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//  of the connection.
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//
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//  FIN-WAIT-1 - represents waiting for a connection termination request
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   113
//  from the remote TCP, or an acknowledgment of the connection
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//  termination request previously sent.
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   115
//
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   116
//  FIN-WAIT-2 - represents waiting for a connection termination request
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//  from the remote TCP.
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   118
//
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   119
//  CLOSE-WAIT - represents waiting for a connection termination request
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//  from the local user.
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//
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   122
//  CLOSING - represents waiting for a connection termination request
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//  acknowledgment from the remote TCP.
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//
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   125
//  LAST-ACK - represents waiting for an acknowledgment of the
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   126
//  connection termination request previously sent to the remote TCP
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//  (which includes an acknowledgment of its connection termination request).
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//
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   129
//  TIME-WAIT - represents waiting for enough time to pass to be sure
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   130
//  the remote TCP received the acknowledgment of its connection
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   131
//  termination request.
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   132
//
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   133
//  CLOSED - represents no connection state at all.
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   134
//
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   135
//  CONNECT - represents waiting for a network path to become ready after
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   136
//  the user has issued an active OPEN request. The request waits in this
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   137
//  state until all the necessary negotiations have been accomplished,
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   138
//  including the establishment of security and mobility bindings. CONNECT is
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   139
//  specific to this TCP implementation and is therefore not visible in the
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   140
//  state chart above. It would be located between CLOSED and SYN-SENT.
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   141
//
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   142
58
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
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   143
//The below is UID of the client(http client) using this option. We are not exposing this right now...
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
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   144
const TUint32 KSoTcpLingerinMicroSec = 0x101F55F6;
0
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   145
#ifdef _LOG
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   146
const TText *CProviderTCP6::TcpState(TUint aState)
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	{
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	TInt i;
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   149
	static const TText* const tcpStates[] = {
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		_S("CONSTRUCTING"),
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			_S("INITIAL"),
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			_S("LISTEN"),
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			_S("SYN-SENT"),
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			_S("SYN-RECEIVED"),
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			_S("ESTABLISHED"),
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			_S("FIN-WAIT-1"),
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   157
			_S("FIN-WAIT-2"),
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			_S("CLOSE-WAIT"),
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			_S("CLOSING"),
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			_S("LAST-ACK"),
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			_S("TIME-WAIT"),
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			_S("CLOSED"),
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			_S("CONNECT"),
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   164
			_S("INVALID"),
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   165
			NULL
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   166
			};
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   167
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   168
	if (aState == ~0UL)
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   169
		aState = iState;
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   170
	for (i = 0; aState && tcpStates[i+1]; aState >>= 1)
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   171
		i++;
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   172
	return tcpStates[i];
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   173
	}
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   174
#endif
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   175
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   176
CProviderTCP6::CProviderTCP6(CProtocolInet6Base* aProtocol)
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   177
	: CProviderInet6Transport(aProtocol)
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   178
	{
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   179
	__DECLARE_NAME(_S("CProviderTCP6"));
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   180
#ifdef SYMBIAN_ADAPTIVE_TCP_RECEIVE_WINDOW	
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   181
	iWindowSetByUser = EFalse;
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   182
#endif	
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   183
	}
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   184
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   185
CProviderTCP6::~CProviderTCP6()
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   186
	{
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   187
	LOG(Log::Printf(_L("\ttcp SAP[%u] being deleted"), (TInt)this));
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   188
	Stop();
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   189
	FreeQueues();
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   190
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   191
	delete iTransmitter;
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   192
	delete iDelayAckTimer;
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parents:
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   193
	delete iRetransTimer;
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   194
	delete iLingerTimer;
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   195
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   196
	// Delete server socket state
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   197
	if (iParent)
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   198
		{
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   199
		// Notify parent.
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   200
		iParent->SetChildDeleted(ETrue);
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   201
		iParent->DetachChild(this);
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   202
		}
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   203
	else if (iListenQueue)
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   204
		{
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   205
		//
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   206
		// Delete all pending child sockets. The child socket destructor will
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parents:
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   207
		// call DetachChild(), removing itself from the socket queue. If the
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   208
		// socket has already been registered with the socket server, we will
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   209
		// simply detach it here.
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   210
		//
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   211
		while (iConnectCount)
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   212
			{
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   213
			ASSERT(iListenQueue[0]->iParent == this);
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   214
			if (iListenQueue[0]->iSockFlags.iAttached)
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parents:
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   215
				DetachChild(iListenQueue[0]);
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   216
			else
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   217
			    {
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   218
			    if (iListenQueue[0]->InState(ETcpSynReceived))
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parents:
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   219
			    	{
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   220
			    	iListenQueue[0]->ClearSYNSettings();
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parents:
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   221
				    iListenQueue[0]->iSockFlags.iSendClose = ETrue;
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parents:
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   222
				    iListenQueue[0]->iSockFlags.iRecvClose = ETrue;
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parents:
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   223
				    iListenQueue[0]->SendSegments();
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parents:
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   224
				    DetachChild(iListenQueue[0]);
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parents:
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   225
			    	}
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   226
			   	else
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parents:
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   227
					delete iListenQueue[0];
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parents:
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			    }
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			}
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		delete[] iListenQueue;
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		}
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	}
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//
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// Initialize a SAP with default values
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//
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void CProviderTCP6::InitL()
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	{
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	TCallBack sender(SenderCallBack, this);
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	TCallBack receiver(ReceiverCallBack, this);
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	TCallBack delack(DelayAckCallBack, this);
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	TCallBack transmitter(TransmitterCallBack, this);
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	TCallBack retransmitter(RetransmitterCallBack, this);
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	TCallBack linger(LingerTimerCallBack, this);
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	CProviderInet6Base::InitL();
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	iFlow.SetProtocol(KProtocolInetTcp);
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	iFlow.SetNotify(this);
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	iSendQ.InitL(transmitter, 13);
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	iRecvQ.InitL(receiver, 12);
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	iTransmitter = new CAsyncCallBack(sender, KInet6DefaultPriority);
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	iDelayAckTimer = new CTcpTimer(delack);
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	iRetransTimer = new CTcpTimer(retransmitter);
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	iLingerTimer = new CTcpTimer(linger);
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   257
	if (!iTransmitter || !iDelayAckTimer || !iRetransTimer || !iLingerTimer)
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   258
		User::Leave(KErrNoMemory);
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	iDelayAckTimer->InitL();
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	iRetransTimer->InitL();
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	iLingerTimer->InitL();
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   263
	iSockInBufSize        = Protocol()->RecvBuf();
53
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   264
#ifdef SYMBIAN_ADAPTIVE_TCP_RECEIVE_WINDOW
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   265
	if(iSockInBufSize == Protocol()->RecvBufFromIniFile())
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	    iSocketStartupCase = ETrue;
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   267
	else
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   268
	    iSocketStartupCase = EFalse;
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   269
#endif //SYMBIAN_ADAPTIVE_TCP_RECEIVE_WINDOW    	
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   270
	
0
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	iSockOutBufSize       = Protocol()->SendBuf();
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	iSsthresh		= KMaxTInt32;
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   273
	iRTO			= Protocol()->InitialRTO();
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	ClearRTT();
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	iMSS                  = Protocol()->MSS();
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	iSMSS			= KTcpStandardMSS;
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	iRMSS			= KTcpStandardMSS;
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	iLinger		= -1;  // linger disabled
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	iFlags.iSackOk	    = Protocol()->Sack();
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	iFlags.iUseTimeStamps	    = Protocol()->TimeStamps();
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	iFlags.iEcn		    = (Protocol()->Ecn() != 0);
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	// Report ICMP errors to application
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	iSockFlags.iReportIcmp    = ETrue;
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   285
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	if (iFlags.iUseTimeStamps)
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		iOptions.SetTimeStamps(0, 0);
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   288
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   289
	if (iFlags.iSackOk)
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		iOptions.SetSackOk();
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   291
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	iOptions.SetAlignOpt(Protocol()->AlignOpt());
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   293
	iStartTime.UniversalTime();
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   294
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   295
	iState = ETcpInitial;
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   296
	
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   297
#ifdef SYMBIAN_ADAPTIVE_TCP_RECEIVE_WINDOW
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   298
    iHiddenFreeWindow 	= 0;
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   299
    iNewTcpWindow    	= 0;
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   300
    iTcpMaxRecvWin       = Protocol()->RecvMaxWnd();
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   301
#endif //SYMBIAN_ADAPTIVE_TCP_RECEIVE_WINDOW
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   302
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   303
	}
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   304
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   305
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   306
void CProviderTCP6::ReadDestinationCache()
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   307
	{
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   308
	if (!Protocol()->DstCache())  // Dest. cache is not enabled as ini parameter
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   309
		{
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		return;
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   311
		}
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   312
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   313
	const TInetAddr& dstaddr = iFlow.FlowContext()->RemoteAddr();
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   314
	if (dstaddr.IsUnspecified())
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   315
		{
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diff changeset
   316
		LOG(Log::Printf(_L("\ttcp SAP[%u] ReadDestinationCache() : No destination address"), (TInt)this));
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   317
		return;
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   318
		}
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parents:
diff changeset
   319
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   320
	TInt err = KErrNone;
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parents:
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   321
	MDestinationCache *dcache = NULL;
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parents:
diff changeset
   322
	TRAP(err, dcache = IMPORT_API_L(Protocol()->Interfacer(), MDestinationCache));
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parents:
diff changeset
   323
	if (err != KErrNone || dcache == NULL)
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parents:
diff changeset
   324
		{
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diff changeset
   325
		LOG(Log::Printf(_L("\ttcp SAP[%u] ReadDestinationCache() : DstCache not available"), (TInt)this));
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parents:
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   326
		return;
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parents:
diff changeset
   327
		}
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parents:
diff changeset
   328
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   329
	const TCacheInfo *cinfo = dcache->Find(dstaddr);
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parents:
diff changeset
   330
	if (!cinfo)
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   331
		{
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diff changeset
   332
		LOG(Log::Printf(_L("\ttcp SAP[%u] ReadDestinationCache() : No match for address in cache"), (TInt)this));
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parents:
diff changeset
   333
		return;
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parents:
diff changeset
   334
		}
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parents:
diff changeset
   335
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parents:
diff changeset
   336
	if (cinfo->iMetrics[TCacheInfo::ESsThresh])
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parents:
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   337
		{
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parents:
diff changeset
   338
		iSsthresh = cinfo->iMetrics[TCacheInfo::ESsThresh];
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parents:
diff changeset
   339
		}
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parents:
diff changeset
   340
	if (cinfo->iMetrics[TCacheInfo::ESRtt])
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parents:
diff changeset
   341
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   342
		iSRTT = cinfo->iMetrics[TCacheInfo::ESRtt];
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   343
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   344
	if (cinfo->iMetrics[TCacheInfo::ERto])
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   345
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   346
		iRTO = cinfo->iMetrics[TCacheInfo::ERto];
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   347
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   348
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   349
	LOG(Log::Printf(_L(
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   350
		"\ttcp SAP[%u] ReadDestinationCache() : Matching DstCache entry found [0x%08x] - ssthresh: %d"),
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   351
		(TInt)this, cinfo, iSsthresh));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   352
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   353
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   354
void CProviderTCP6::StoreDestinationCache()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   355
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   356
	if (!Protocol()->DstCache() || !iFlow.FlowContext())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   357
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   358
		return;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   359
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   360
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   361
	const TInetAddr& dstaddr = iFlow.FlowContext()->RemoteAddr();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   362
	if (dstaddr.IsUnspecified())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   363
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   364
		LOG(Log::Printf(_L("\ttcp SAP[%u] StoreDestinationCache() : No destination address"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   365
		return;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   366
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   367
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   368
	TInt err = KErrNone;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   369
	MDestinationCache *dcache = NULL;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   370
	TRAP(err, dcache = IMPORT_API_L(Protocol()->Interfacer(), MDestinationCache));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   371
	if (err != KErrNone || dcache == NULL)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   372
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   373
		LOG(Log::Printf(_L("\ttcp SAP[%u] StoreDestinationCache() : DstCache not available"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   374
		return;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   375
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   376
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   377
	TCacheInfo cinfo;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   378
	cinfo.ClearAll();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   379
	cinfo.iMetrics[TCacheInfo::ESsThresh] = iSsthresh;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   380
	cinfo.iMetrics[TCacheInfo::ESRtt] = iSRTT;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   381
	cinfo.iMetrics[TCacheInfo::ERto] = iRTO;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   382
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   383
	TRAP(err, dcache->StoreL(dstaddr, cinfo));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   384
	if (err != KErrNone)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   385
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   386
		LOG(Log::Printf(_L("\ttcp SAP[%u] StoreDestinationCache() : DstCache store failed"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   387
		return;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   388
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   389
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   390
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   391
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   392
void CProviderTCP6::Start()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   393
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   394
	LOG(Log::Printf(_L("Start\ttcp SAP[%u] enter"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   395
	CProviderInet6Transport::Start();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   396
	iFlags.iStarted = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   397
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   398
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   399
	// Detach from parent socket
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   400
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   401
	if (iParent)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   402
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   403
		iSockFlags.iNotify = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   404
		iParent->DetachChild(this);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   405
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   406
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   407
		// Tell ESock which network interface the child socket is using.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   408
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   409
		const MInterface *iface = Protocol()->Interfacer()->Interface(iFlow.FlowContext()->Interface());
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   410
		if (iface != NULL)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   411
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   412
			TPckgBuf<TSoIfConnectionInfo> netinfo;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   413
			netinfo().iIAPId = iface->Scope(EScopeType_IAP);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   414
			netinfo().iNetworkId = iface->Scope(EScopeType_NET);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   415
			LOG(Log::Printf(_L("\ttcp SAP[%u] Bearer IAP=%d, NID=%d"), (TInt)this, netinfo().iIAPId, netinfo().iNetworkId));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   416
			iSocket->Bearer(netinfo);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   417
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   418
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   419
		// Report error if TCP has been disconnected already
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   420
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   421
		if (InState(ETcpClosed))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   422
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   423
			LOG(Log::Printf(_L("\ttcp SAP[%u] %s, Error %d"), (TInt)this, TcpState(), KErrDisconnected));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   424
			Error(KErrDisconnected);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   425
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   426
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   427
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   428
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   429
	// If an error has occurred, we must deliver it to the
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   430
	// socket server now that the socket notifier has been
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   431
	// initialised.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   432
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   433
	if (iLastError.iStatus != KErrNone && iErrorMask != 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   434
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   435
		LOG(Log::Printf(_L("\ttcp SAP[%u] Delayed error %d, mask %b delivered."),
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   436
			(TInt)this, iLastError.iStatus, iErrorMask));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   437
		iSocket->Error(iLastError.iStatus, iErrorMask);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   438
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   439
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   440
	// Wake up the receiver. We might have something to do.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   441
	iRecvQ.Wake();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   442
	LOG(Log::Printf(_L("Start\ttcp SAP[%u] exit"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   443
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   444
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   445
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   446
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   447
// Stop all transmission (except for iSendQ, which will be allowed to drain)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   448
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   449
void CProviderTCP6::Stop()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   450
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   451
	if (iTransmitter)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   452
		CancelTransmit();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   453
	if (iRetransTimer)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   454
		CancelRetransmit();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   455
	if (iDelayAckTimer)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   456
		CancelDelayACK();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   457
	if (iLingerTimer)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   458
		iLingerTimer->Cancel();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   459
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   460
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   461
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   462
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   463
// Empty all queues
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   464
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   465
void CProviderTCP6::FreeQueues()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   466
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   467
	iSockInQ.Free();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   468
	iSockInQLen = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   469
	iSockOutQ.Free();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   470
	iSockOutQLen = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   471
	iFragQ.Free();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   472
	iRecvQ.Free();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   473
	iSendQ.Cancel();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   474
	iSendQ.Free();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   475
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   476
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   477
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   478
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   479
// Close the socket down
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   480
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   481
void CProviderTCP6::Close()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   482
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   483
	StoreDestinationCache();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   484
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   485
	iSockFlags.iSendClose = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   486
	iSockFlags.iRecvClose = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   487
	Protocol()->UnbindProvider(this);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   488
	Stop();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   489
	FreeQueues();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   490
	EnterState(ETcpClosed);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   491
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   492
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   493
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   494
void CProviderTCP6::Ioctl(TUint aLevel, TUint aName, TDes8* aOption)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   495
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   496
	LOG(Log::Printf(_L("Ioctl\ttcp SAP[%u] %x, %x"), (TInt)this, aLevel, aName));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   497
	if (aLevel == KSolInetTcp && aName == KIoctlTcpNotifyDataSent)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   498
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   499
		iFlags.iDataSentIoctl = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   500
		CompleteIoctl(KErrNone);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   501
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   502
	else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   503
		CProviderInet6Transport::Ioctl(aLevel, aName, aOption);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   504
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   505
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   506
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   507
void CProviderTCP6::CancelIoctl(TUint aLevel, TUint aName)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   508
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   509
	LOG(Log::Printf(_L("CancelIoctl\ttcp SAP[%u] %x, %x"), (TInt)this, aLevel, aName));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   510
	if (aLevel == KSolInetTcp && aName == KIoctlTcpNotifyDataSent)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   511
		CompleteIoctl(KErrCancel);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   512
	else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   513
		CProviderInet6Transport::CancelIoctl(aLevel, aName);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   514
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   515
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   516
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   517
TInt CProviderTCP6::SetOption(TUint aLevel, TUint aName, const TDesC8& aOption)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   518
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   519
	TInt ret = KErrNotSupported;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   520
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   521
	if (aLevel == KSolInetTcp)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   522
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   523
		TInt intValue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   524
		ret = GetOptionInt(aOption, intValue);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   525
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   526
#ifdef _LOG
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   527
		if (ret == KErrNone)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   528
			Log::Printf(_L("SetOpt\ttcp SAP[%u] KSolInetTcp, %d, %d"), (TInt)this, aName, intValue);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   529
		else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   530
			Log::Printf(_L("SetOpt\ttcp SAP[%u] KSolInetTcp, %d"), (TInt)this, aName);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   531
#endif
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   532
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   533
		switch (aName)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   534
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   535
		case KSoTcpAsync2MslWait:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   536
			// Not implemented. Not very useful.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   537
			ret = KErrNotSupported;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   538
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   539
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   540
		case KSoTcpKeepAlive:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   541
			if (ret == KErrNone)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   542
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   543
				if (!intValue)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   544
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   545
					iFlags.iHaveKeepAlive = FALSE;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   546
					iFlags.iHaveTriggeredKeepAlive = FALSE;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   547
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   548
				if (intValue & 1)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   549
					iFlags.iHaveKeepAlive = TRUE;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   550
				if (intValue & 2)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   551
					iFlags.iHaveTriggeredKeepAlive = TRUE;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   552
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   553
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   554
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   555
		case KSoTcpMaxSegSize:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   556
			if (ret == KErrNone)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   557
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   558
				if (!InState(ETcpInitial))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   559
					ret = KErrLocked;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   560
				else if (intValue < STATIC_CAST(TInt, KTcpMinimumMSS))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   561
					ret = KErrArgument;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   562
				else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   563
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   564
					iMSS = intValue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   565
					iSMSS = iMSS;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   566
					iRMSS = iMSS;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   567
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   568
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   569
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   570
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   571
		case KSoTcpNextSendUrgentData:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   572
			if (ret == KErrNone)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   573
				iFlags.iNextIsUrgent = intValue ? TRUE : FALSE;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   574
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   575
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   576
		case KSoTcpNoDelay:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   577
			if (ret == KErrNone)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   578
				iFlags.iNoDelay = intValue ? TRUE : FALSE;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   579
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   580
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   581
		case KSoTcpCork:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   582
		case KSoTcpNoPush:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   583
			if (ret == KErrNone)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   584
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   585
				iFlags.iCork = intValue ? TRUE : FALSE;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   586
				if (iFlags.iCork == EFalse && aName == KSoTcpCork)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   587
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   588
					// When turning Cork off, send pending data from output queue immediately.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   589
					// This is the only difference between Cork and NoPush
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   590
					SchedTransmit();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   591
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   592
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   593
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   594
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   595
		case KSoTcpOobInline:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   596
			if (ret == KErrNone)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   597
				iFlags.iOobInline = intValue ? TRUE : FALSE;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   598
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   599
		
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   600
#ifdef SYMBIAN_ADAPTIVE_TCP_RECEIVE_WINDOW	
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   601
		case KSoTcpMaxRecvWin:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   602
			//Case to set the Max window size from shim.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   603
			if(ret == KErrNone)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   604
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   605
				if (InState(ETcpClosed|ETcpFinWait2|ETcpCloseWait|ETcpLastAck))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   606
					ret = KErrLocked;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   607
				else	
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   608
				    if(intValue > iTcpMaxRecvWin)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   609
				    {
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   610
				    iTcpMaxRecvWin = intValue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   611
				    }
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   612
				
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   613
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   614
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   615
		case KSoTcpRecvWinAuto:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   616
		    {
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   617
		    // If user sets the window size, we have to give the preference for user setting. Automatic
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   618
		    // window setting will be then disabled by default, once user calls the SetOption to set the 
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   619
		    // receive window, this feature will be diabled by default till the socket is opened.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   620
		    if(iWindowSetByUser)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   621
		        {
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   622
		        return KErrNone;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   623
		        }
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   624
		    else if (InState(ETcpClosed|ETcpFinWait2|ETcpCloseWait|ETcpLastAck))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   625
		        ret = KErrLocked;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   626
            else if (intValue < STATIC_CAST(TInt, KTcpMinimumWindow))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   627
                iSockInBufSize = KTcpMinimumWindow;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   628
            else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   629
                {
53
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   630
                //If its the startup case, then there should be no algorithm used to shrink
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   631
				//or expand the window size from the default value provided in the ini file
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   632
                //the new value should be set directly
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   633
                if(iSocketStartupCase)
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   634
                    {
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   635
					//Add the extra window to free window pool
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   636
					//if the window being set is greater than what is specified in ini file (startup case), then just overwrite the new window.
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   637
					//Add difference to free window
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   638
					//else set free window to zero
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   639
					if(intValue > iSockInBufSize)
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   640
						iFreeWindow += intValue - iSockInBufSize;
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   641
					else
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   642
						iFreeWindow = 0;
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   643
					//set the buffer
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   644
                    iSockInBufSize = intValue;
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   645
					//disable startup flag.
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   646
                    iSocketStartupCase = EFalse;
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   647
                    }
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   648
                else 
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   649
                {
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   650
					// Check for minimum value
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   651
	                if (intValue < STATIC_CAST(TInt, KTcpMinimumWindow))
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   652
	                    {
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   653
	                    intValue = STATIC_CAST(TInt, KTcpMinimumWindow);
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   654
	                    }
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   655
	                // Handle the situation where the connection has been established and 
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   656
	                // window scaling is not in use
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   657
	                if ( InState( ETcpSynReceived | ETcpEstablished ) && !iRcvWscale )
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   658
	                    {
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   659
	                    // Do not allow window sizes larger than 0xFFFF
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   660
	                    intValue = Min ( intValue, 0xFFFF );
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   661
	                    }
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   662
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   663
	                // Check whether we are increasing or decreasing window size
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   664
	                if ( intValue >= iSockInBufSize )
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   665
	                    {
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   666
	                    // New window is larger than current one, check if a
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   667
	                    // shrinking process is active
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   668
	                    if ( !iNewTcpWindow )
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   669
	                        {
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   670
	                        // Mark new "space" as free, it will be updated to
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   671
	                        // peer on next operation.
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   672
	                        iFreeWindow += intValue - iSockInBufSize;
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   673
	                        }
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   674
	                    else
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   675
	                        {
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   676
	                        // In the middle of shrinking process.
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   677
                      if ( iShrinkedWindowSize <= ( intValue - iSockInBufSize ))
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   678
	                            {
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   679
	                            // Increment to window size is enough to complete
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   680
	                            // shrinking process. Update variables and exit
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   681
	                            // from shrinking process.
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   682
                          iFreeWindow = ( intValue - iSockInBufSize ) - iShrinkedWindowSize;
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   683
	                            iShrinkedWindowSize = 0;
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   684
	                            iNewTcpWindow = 0;
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   685
	                            }
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   686
	                        else
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   687
	                            {
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   688
	                            // Not quite there yet but closer. Less to shrink,
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   689
	                            // update this, but do not exit from shrinking
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   690
	                            // process
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   691
                          iShrinkedWindowSize -= intValue - iSockInBufSize;
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   692
	                            iNewTcpWindow = intValue;
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   693
	                            }
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   694
	                        }
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   695
	                    }
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   696
	                else
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   697
	                    {
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   698
	                    // Requested window is smaller than current one. Start or
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   699
	                    // continue shrinking process. RCV window can be occupied
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   700
	                    // for two different purpose at the moment
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   701
	                    // 1. Client data in iSockInQ not read by application
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   702
	                    // 2. Free window "opened" to peer (iAdvertisedWindow)
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   703
	                    // When shrinking, we must ensure that when reopening
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   704
	                    // the window to client there must be truly empty space
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   705
	                    // in the window. Thus, freeze the right edge of the
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   706
	                    // window (iRCV.NXT + iRCV.WND stays constant) until
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   707
	                    // shrinking is completed.
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   708
	                
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   709
	                    if ( iNewTcpWindow )
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   710
	                        {
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   711
	                        // There is an ongoing shrink process, add the
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   712
	                        // change to the amount to be shrinked
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   713
	                        iShrinkedWindowSize += iSockInBufSize - intValue;
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   714
	                        iNewTcpWindow = intValue;
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   715
	                        }
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   716
	                    else
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   717
	                        {
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   718
	                        // This is a new shrinking process, count how much
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   719
	                        // needs to be shrinked
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   720
                      iShrinkedWindowSize = iSockInQLen + iRCV.WND;
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   721
	                        if ( iShrinkedWindowSize >= intValue )
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   722
	                            {
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   723
	                            // We need to shrink since the currently occupied
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   724
	                            // window does not fit to new one
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   725
	                            iShrinkedWindowSize -= intValue;
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   726
	                            // There is now free space in the window
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   727
	                            iFreeWindow = 0;
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   728
	                            // iNewTcpWindow is used as a state variable for
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   729
	                            // shrinking
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   730
	                            iNewTcpWindow = intValue;
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   731
	                            }
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   732
	                        else
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   733
	                            {
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   734
	                            // No need to shrink since we can fit the current
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   735
	                            // contents to the new window, update free window
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   736
	                            // If TCP connection is not yet setup, the free
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   737
	                            // window will be updated on connection setup, 
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   738
	                            // for existing connection it will be used
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   739
	                            // next time application reads data
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   740
	                            if ( iFreeWindow >= ( iSockInBufSize - intValue ))
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   741
	                                {
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   742
	                                iFreeWindow -= iSockInBufSize - intValue;
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   743
	                                }
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   744
	                            else 
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   745
	                                {
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   746
	                                // Something wrong. Try to reevaluate...
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   747
	                                iFreeWindow = intValue - iShrinkedWindowSize;
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   748
	                                }
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   749
	                            iShrinkedWindowSize = 0;
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   750
	                            }
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   751
	                        }
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   752
	                    }
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   753
	                // Even in case of window shrink we can set the receive buffer size
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   754
	                // immediately. This will be helpful, for processing SYN-ACK and other
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   755
	                // receiver side processing.
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   756
	                // For already connected sockets iNewTcpWindow will be taking care
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   757
	                // of shrinking the window size for that TCP session.
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   758
	                iSockInBufSize = intValue;
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   759
	                }
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
   760
	            } 
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   761
		    }
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   762
		    break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   763
#endif //SYMBIAN_ADAPTIVE_TCP_RECEIVE_WINDOW
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   764
			case KSoTcpRecvWinSize:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   765
			    {
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   766
#ifdef SYMBIAN_ADAPTIVE_TCP_RECEIVE_WINDOW  
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   767
                iWindowSetByUser = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   768
#endif // SYMBIAN_ADAPTIVE_TCP_RECEIVE_WINDOW                
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   769
                if (ret == KErrNone)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   770
                    {
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   771
                    if (!InState(ETcpInitial))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   772
                        ret = KErrLocked;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   773
                    else if (intValue < STATIC_CAST(TInt, KTcpMinimumWindow))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   774
                        iSockInBufSize = KTcpMinimumWindow;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   775
                    else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   776
                        {
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   777
                        iSockInBufSize = intValue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   778
                        }
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   779
                    }
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   780
			    }
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   781
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   782
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   783
		case KSoTcpSendWinSize:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   784
			if (ret == KErrNone)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   785
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   786
				if (!InState(ETcpInitial))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   787
					ret = KErrLocked;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   788
				else if (intValue < STATIC_CAST(TInt, KTcpMinimumWindow))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   789
					iSockOutBufSize = KTcpMinimumWindow;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   790
				else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   791
					iSockOutBufSize = intValue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   792
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   793
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   794
58
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
   795
		case KSoTcpLingerinMicroSec:
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
   796
            RDebug::Printf("TSoTcpLingerinMicroSec is set");
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
   797
            //Enable micro sec calculation for TCP linger timer. User (currently just exposed to browser)
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
   798
            //will specify linger time in microsecs. 
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
   799
            iMicroSecCalcFlag=ETrue;           
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   800
		case KSoTcpLinger:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   801
			if (aOption.Length() < (TInt)sizeof(TSoTcpLingerOpt))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   802
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   803
				return KErrArgument;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   804
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   805
			if (iSockFlags.iSendClose)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   806
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   807
				return KErrInUse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   808
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   809
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   810
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   811
				TSoTcpLingerOpt *opt = (TSoTcpLingerOpt *)aOption.Ptr();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   812
				if (opt->iOnOff != 0 && opt->iLinger >= 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   813
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   814
					if (opt->iLinger > KTcpMaxLingerTime)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   815
						{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   816
						return KErrArgument;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   817
						}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   818
					iLinger = opt->iLinger;  // linger enabled.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   819
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   820
				else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   821
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   822
					iLinger = -1;  // linger disabled.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   823
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   824
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   825
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   826
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   827
		default:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   828
			ret = KErrNotSupported;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   829
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   830
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   831
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   832
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   833
	if (aLevel == KSolInetIp)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   834
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   835
		TInt intValue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   836
		ret = GetOptionInt(aOption, intValue);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   837
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   838
		switch(aName)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   839
        	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   840
		case KSoIpTOS:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   841
			// Silently filter out the ECN bits from TOS setting.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   842
            // We're assuming that Protocol->Ecn() (based on ini params) holds the correct
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   843
            // values for ECN bits.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   844
            	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   845
	            intValue = (intValue & 0xfc) | Protocol()->Ecn();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   846
            	TPckgBuf<TInt> tosopt(intValue);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   847
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   848
	            // Rest of the option processing is done at the lower levels.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   849
    	        return CProviderInet6Transport::SetOption(aLevel, aName, tosopt);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   850
    	        }
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   851
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   852
		case KSoHeaderIncluded:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   853
		case KSoRawMode:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   854
			// The base class implements HeaderIncluded and RawMode by default.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   855
			// Force "Not Supported" for TCP here!
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   856
			return KErrNotSupported;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   857
		default:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   858
        	ret = KErrNotSupported;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   859
            }
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   860
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   861
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   862
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   863
	if (ret == KErrNotSupported)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   864
		ret = CProviderInet6Transport::SetOption(aLevel, aName, aOption);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   865
	
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   866
	return ret;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   867
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   868
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   869
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   870
TInt CProviderTCP6::GetOption(TUint aLevel, TUint aName, TDes8& aOption) const
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   871
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   872
	LOG(Log::Printf(_L("GetOpt\ttcp SAP[%u] %d, %d"), (TInt)this, aLevel, aName));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   873
	CProviderTCP6 *This = CONST_CAST(CProviderTCP6*, this);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   874
	TInt ret = KErrNotSupported, urgentChar;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   875
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   876
	switch (aLevel)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   877
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   878
	case KSOLSocket:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   879
		switch (aName)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   880
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   881
		case KSOReadBytesPending:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   882
			ret = SetOptionInt(aOption, iPending);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   883
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   884
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   885
		case KSOUrgentDataOffset:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   886
			ret = SetOptionInt(aOption, iUpCount ? UrgentOffset() - iUpCount + 1 : 0);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   887
			LOG(Log::Printf(_L("\ttcp SAP[%u] Urgent data offset = %d"),
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   888
				(TInt)this, iUpCount ? UrgentOffset() : 0));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   889
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   890
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   891
		default:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   892
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   893
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   894
		break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   895
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   896
	case KSolInetTcp:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   897
		switch (aName)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   898
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   899
		case KSoTcpAsync2MslWait:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   900
			// XXX - Not implemented. Not very useful.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   901
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   902
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   903
		case KSoTcpKeepAlive:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   904
			ret = SetOptionInt(aOption, iFlags.iHaveKeepAlive);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   905
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   906
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   907
		case KSoTcpMaxSegSize:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   908
			ret = SetOptionInt(aOption, iMSS);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   909
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   910
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   911
		case KSoTcpNextSendUrgentData:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   912
			ret = SetOptionInt(aOption, iFlags.iNextIsUrgent);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   913
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   914
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   915
		case KSoTcpNoDelay:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   916
			ret = SetOptionInt(aOption, iFlags.iNoDelay);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   917
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   918
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   919
		case KSoTcpCork:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   920
		case KSoTcpNoPush:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   921
			ret = SetOptionInt(aOption, iFlags.iCork);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   922
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   923
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   924
		case KSoTcpOobInline:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   925
			ret = SetOptionInt(aOption, iFlags.iOobInline);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   926
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   927
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   928
		case KSoTcpRecvWinSize:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   929
			ret = SetOptionInt(aOption, iSockInBufSize);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   930
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   931
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   932
		case KSoTcpSendWinSize:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   933
			ret = SetOptionInt(aOption, iSockOutBufSize);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   934
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   935
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   936
		case KSoTcpListening:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   937
			ret = SetOptionInt(aOption, InState(ETcpListen) ? 1 : 0);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   938
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   939
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   940
		case KSoTcpNumSockets:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   941
			ret = SetOptionInt(aOption, Protocol()->SapCount());
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   942
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   943
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   944
		case KSoTcpLinger:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   945
			if (aOption.MaxLength() < (TInt)sizeof(TSoTcpLingerOpt))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   946
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   947
				return KErrTooBig;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   948
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   949
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   950
			TSoTcpLingerOpt opt;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   951
			if (iLinger == -1)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   952
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   953
				opt.iOnOff = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   954
				opt.iLinger = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   955
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   956
			else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   957
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   958
				opt.iOnOff = 1;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   959
				opt.iLinger = iLinger;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   960
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   961
			aOption.SetLength(sizeof(opt));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   962
			aOption.Copy((TUint8*)&opt, sizeof(opt));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   963
			ret = KErrNone;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   964
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   965
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   966
		case KSoTcpPeekUrgentData:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   967
			if (ret = This->GetUrgent(urgentChar, KSockReadPeek), ret == KErrNone)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   968
				ret = SetOptionInt(aOption, urgentChar);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   969
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   970
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   971
		case KSoTcpRcvAtMark:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   972
			ret = SetOptionInt(aOption, (UrgentOffset() == 0) ? 1 : 0);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   973
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   974
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   975
		case KSoTcpReadBytesPending:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   976
			ret = SetOptionInt(aOption, iPending);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   977
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   978
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   979
		case KSoTcpReadUrgentData:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   980
			if (ret = This->GetUrgent(urgentChar, 0), ret == KErrNone)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   981
				ret = SetOptionInt(aOption, urgentChar);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   982
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   983
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   984
		case KSoTcpSendBytesPending:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   985
			ret = SetOptionInt(aOption, iSockOutQLen);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   986
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   987
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   988
		default:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   989
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   990
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   991
		break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   992
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   993
	case KSolInetIp:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   994
		switch(aName)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   995
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   996
        case KSoIpTOS:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   997
			// Clear the ECN bits from the returned value before delivering it to socket.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   998
            ret = CProviderInet6Transport::GetOption(aLevel, aName, aOption);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   999
            if (ret != KErrNone)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1000
            	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1001
                TInt intValue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1002
                if (GetOptionInt(aOption, intValue) == KErrNone)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1003
                	ret = SetOptionInt(aOption, intValue & 0xfc);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1004
                }
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1005
            break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1006
		case KSoHeaderIncluded:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1007
		case KSoRawMode:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1008
			// The base class implements HeaderIncluded and RawMode by default.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1009
			// Force "Not Supported" for TCP here!
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1010
			return KErrNotSupported;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1011
        default:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1012
        	break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1013
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1014
		break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1015
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1016
	default:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1017
		break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1018
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1019
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1020
	if (ret == KErrNotSupported)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1021
		ret = CProviderInet6Transport::GetOption(aLevel, aName, aOption);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1022
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1023
	return ret;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1024
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1025
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1026
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1027
TInt CProviderTCP6::SetRemName(TSockAddr &aAddr)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1028
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1029
	TInt err;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1030
	TInetAddr addr = aAddr;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1031
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1032
	// Check port range
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1033
	if (addr.Port() < 1 || addr.Port() > 65535)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1034
		return KErrGeneral;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1035
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1036
	// Check address
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1037
	if (addr.IsUnspecified() || !addr.IsUnicast())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1038
		return KErrBadName;	
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1039
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1040
	if (addr.Family() == KAfInet)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1041
		addr.ConvertToV4Mapped();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1042
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1043
	TInt family = addr.IsV4Mapped() ? KAfInet : KAfInet6;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1044
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1045
	if(iSockFamily == KAFUnspec)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1046
		iSockFamily = family;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1047
	else if (iSockFamily != family)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1048
		return KErrBadName;		
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1049
		
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1050
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1051
	// If we're reusing a local address we must check for an existing
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1052
	// connection before we can accept the remote address.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1053
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1054
	if (iSockFlags.iReuse && iFlow.FlowContext()->LocalPort() != KInetPortNone)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1055
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1056
		if (Protocol()->LocateSap(EMatchConnection, KAFUnspec, iFlow.FlowContext()->LocalAddr(), addr))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1057
			return KErrInUse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1058
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1059
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1060
	// Set remote address and port.. use original to get iAppFamily valid.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1061
	if (err = CProviderInet6Transport::SetRemName(aAddr), err != KErrNone)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1062
		return err;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1063
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1064
	return KErrNone;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1065
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1066
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1067
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1068
void CProviderTCP6::ActiveOpen()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1069
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1070
	LOG(Log::Printf(_L("ActiveOpen\ttcp SAP[%u]"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1071
	ASSERT(InState(ETcpInitial));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1072
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1073
	TInt status = iFlow.Connect();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1074
	if (status < 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1075
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1076
		LOG(Log::Printf(_L("\ttcp SAP[%u] Flow status = %d"), (TInt)this, status));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1077
		iSockFlags.iConnected = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1078
		Error(status, MSocketNotify::EErrorConnect);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1079
		return;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1080
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1081
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1082
	// Store KeepInterfaceUp to be restored when entering Established state.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1083
	StoreKeepInterfaceUp();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1084
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1085
	EnterState(ETcpConnect);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1086
	if (status == EFlow_READY)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1087
		SendSYN();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1088
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1089
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1090
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1091
TInt CProviderTCP6::PassiveOpen(TUint aQueSize)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1092
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1093
	ASSERT(InState(ETcpInitial));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1094
	ASSERT(!iListenQueue);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1095
	LOG(Log::Printf(_L("PassiveOpen\ttcp SAP[%u] QueSize=%d"), (TInt)this, aQueSize));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1096
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1097
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1098
	// On EPOC you can only call listen once, so it is safe to do this here.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1099
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1100
	iListenQueue = new CProviderTCP6*[aQueSize];
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1101
	if (!iListenQueue)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1102
		return KErrNoMemory;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1103
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1104
	iListenQueueSize = aQueSize;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1105
	for (TUint i=0; i < iListenQueueSize; i++)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1106
		iListenQueue[i] = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1107
	EnterState(ETcpListen);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1108
	return KErrNone;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1109
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1110
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1111
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1112
// This routine tries to detach the socket from the socket server.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1113
// Detach() is called from Shutdown(), when the user has called
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1114
// Close() or Shutdown(ENormal).
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1115
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1116
// If linger timeout is active, Shutdown() will complete with
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1117
// error KErrWouldBlock.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1118
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1119
void CProviderTCP6::Detach()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1120
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1121
	LOG(Log::Printf(_L("\ttcp SAP[%u] Detach()"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1122
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1123
	StoreDestinationCache();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1124
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1125
	CompleteIoctl(KErrCancel);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1126
	if (iLinger > 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1127
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1128
		iLingerTimer->Cancel();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1129
		Error(KErrWouldBlock, MSocketNotify::EErrorClose);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1130
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1131
	iLinger = -1;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1132
	NoSecurityChecker();				// The checker will be unusable.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1133
	iSocket->CanClose(MSocketNotify::EDetach);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1134
	iSockFlags.iNotify = EFalse;            // No more upcalls
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1135
	iSockFlags.iAttached = (iSocket != 0);  // Did we get detached?
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1136
	LOG(if (iSockFlags.iAttached) Log::Printf(_L("\ttcp SAP[%u] DETACH FAILED!"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1137
	ASSERT(!iSockFlags.iAttached);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1138
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1139
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1140
void CProviderTCP6::Expire()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1141
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1142
	if (!iSockFlags.iAttached)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1143
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1144
		LOG(Log::Printf(_L("\ttcp SAP[%u] Expire(): SELF DESTRUCT!"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1145
		delete this;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1146
		return;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1147
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1148
	if (iSockFlags.iNotify)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1149
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1150
		LOG(Log::Printf(_L("\ttcp SAP[%u] Expire(): DISCONNECT!"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1151
		Close();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1152
		iSockFlags.iNotify = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1153
		iSocket->Disconnect();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1154
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1155
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1156
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1157
void CProviderTCP6::Shutdown(TCloseType aOption)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1158
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1159
	LOG(Log::Printf(_L("Shutdown\ttcp SAP[%u] TCloseType=%d"), (TInt)this, aOption));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1160
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1161
	switch(aOption)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1162
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1163
	case ENormal:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1164
		if (InState(ETcpListen|ETcpInitial|ETcpConnect|ETcpSynSent|ETcpClosed))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1165
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1166
			// Just do a brutal shutdown in these states.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1167
			Close();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1168
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1169
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1170
		
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1171
		// No need to negotiate parameters as we only want to notify other end point.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1172
		if (InState(ETcpSynReceived))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1173
			ClearSYNSettings();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1174
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1175
		// Send RST if receive queue is not empty.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1176
		if (iLinger == 0 || SockInQLen() || !iFragQ.IsEmpty())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1177
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1178
			SendReset(iSND.NXT);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1179
			if (FatalState())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1180
				break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1181
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1182
			// If linger is enabled and timer==0, close the socket immediately
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1183
			if (iLinger == 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1184
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1185
				Close();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1186
				break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1187
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1188
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1189
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1190
		iSockFlags.iSendClose = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1191
		iSockFlags.iRecvClose = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1192
		iSockInQ.Free();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1193
		iSockInQLen = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1194
		iFragQ.Free();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1195
		iNewData = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1196
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1197
		if (iLinger == -1 || iSockOutQLen == 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1198
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1199
			Detach();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1200
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1201
		else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1202
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1203
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1204
			// Start linger timer. RSocket::Close() returns when timer
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1205
			// expires or when all data has been succesfully transmitted.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1206
			//
58
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  1207
		    if(iMicroSecCalcFlag)
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  1208
                {
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  1209
                //expecting iLinger timer to be specified in microsec.This will be set currently by browser where in
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  1210
                //it is expected to be close with in certian time
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  1211
                iLingerTimer->Start(iLinger * 1);
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  1212
                }
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  1213
            else
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  1214
                {
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  1215
                iLingerTimer->Start(iLinger * KOneSecondInUs);
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  1216
                }			
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1217
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1218
		SchedTransmit();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1219
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1220
		break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1221
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1222
	case EStopInput:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1223
	case EStopOutput:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1224
		if (InState(ETcpListen|ETcpInitial))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1225
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1226
			Error(KErrNotSupported, MSocketNotify::EErrorClose);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1227
			return;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1228
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1229
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1230
		if (aOption == EStopInput)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1231
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1232
			iSockFlags.iRecvClose = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1233
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1234
			// Send RST if receive queue is not empty.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1235
			if (SockInQLen() || !iFragQ.IsEmpty())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1236
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1237
				SendReset(iSND.NXT);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1238
				if (FatalState())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1239
					break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1240
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1241
			iSockInQ.Free();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1242
			iFragQ.Free();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1243
			iNewData = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1244
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1245
		else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1246
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1247
			// HalfDuplex Close and simultaneous SYN_RCVD -> FIN_WAIT_1 is not supported.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1248
			iSockFlags.iSendClose = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1249
			SchedTransmit();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1250
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1251
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1252
		Error(KErrNone, MSocketNotify::EErrorClose);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1253
		Nif::SetSocketState(ENifSocketConnected, this);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1254
		break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1255
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1256
	case EImmediate:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1257
		if (InState(ETcpSynReceived|ETcpEstablished|ETcpFinWait1|ETcpFinWait2|ETcpCloseWait))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1258
			SendReset(iSND.NXT);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1259
		CompleteIoctl(KErrCancel);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1260
		Close();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1261
		return;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1262
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1263
	default:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1264
		Panic(EInet6Panic_NotSupported);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1265
		break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1266
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1267
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1268
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1269
	// If we encountered a fatal error during the above processing,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1270
	// stop everything and enter CLOSED state.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1271
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1272
	if (FatalState())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1273
		Close();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1274
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1275
	if (InState(ETcpFinWait2) && iSockFlags.iRecvClose)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1276
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1277
		LOG(Log::Printf(_L("\ttcp SAP[%u] Setting FIN-WAIT-2 timeout"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1278
		SchedMsl2Wait();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1279
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1280
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1281
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1282
	// If we're in CLOSED state and we're not detached,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1283
	// tell the socket server that we're ready to die.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1284
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1285
	if (iSocket && InState(ETcpClosed))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1286
		iSocket->CanClose();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1287
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1288
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1289
	// Note!  The socket server can immediately delete the socket
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1290
	//        within CanClose(). Don't add anything here!
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1291
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1292
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1293
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1294
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1295
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1296
// PRTv1.0 API
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1297
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1298
TUint CProviderTCP6::Write(const TDesC8 & aDesc, TUint aOptions, TSockAddr* /*aAddr*/ /*=NULL*/)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1299
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1300
	TDualBufPtr buf(aDesc);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1301
	return Send(buf, aDesc.Length(), aOptions);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1302
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1303
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1304
void CProviderTCP6::GetData(TDes8 & aDesc, TUint aOptions, TSockAddr* /*aAddr*/)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1305
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1306
	TDualBufPtr aBuf(aDesc);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1307
	Recv(aBuf, aDesc.Length(), aOptions);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1308
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1309
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1310
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1311
// PRTv1.5 API
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1312
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1313
TInt CProviderTCP6::Write(RMBufChain& aData, TUint aOptions, TSockAddr* /* anAddr*/)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1314
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1315
	TDualBufPtr buf(aData);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1316
	return Send(buf, aData.Length(), aOptions);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1317
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1318
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1319
TInt CProviderTCP6::GetData(RMBufChain& aData, TUint aLength, TUint aOptions, TSockAddr* /*aAddr*/)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1320
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1321
	TDualBufPtr aBuf(aData);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1322
	return Recv(aBuf, aLength, aOptions);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1323
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1324
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1325
TInt CProviderTCP6::Send(TDualBufPtr& aBuf, TInt aLength, TUint aOptions)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1326
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1327
	LOG(Log::Printf(_L("Write\ttcp SAP[%u] len=%d, options=%d"), (TInt)this, aLength, aOptions));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1328
	ASSERT(aLength > 0);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1329
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1330
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1331
	// Limit queue size to maximum socket buffer size rounded down to nearest multiple segment.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1332
	// Note: during fast recover we allow the socket buffer to expand in order to have enough
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1333
	// data to keep the transmission going.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1334
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1335
	TInt effMSS = EffectiveMSS();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1336
	TInt bufSize = iSockOutBufSize +
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1337
		(iSacked.Count() ? (iSacked.Last()->iRight - iSND.UNA) : (iDupAcks * iSMSS));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1338
	TInt reserve = (bufSize - (iSND.NXT - iSND.UNA)) % effMSS;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1339
	TInt space = bufSize - iSockOutQLen - reserve;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1340
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1341
	LOG(Log::Printf(_L("\ttcp SAP[%u] len=%d space=%d"), (TInt)this, aLength, space));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1342
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1343
	if ((aOptions & KSockWriteUrgent) || iFlags.iNextIsUrgent)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1344
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1345
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1346
		// According to RFC1122 the urgent pointer should point to the
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1347
		// last byte of urgent data. However, practically all TCP stacks
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1348
		// today choose to conform to BSD unix and follow the original
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1349
		// behaviour stated in RFC793. Therefore, we set the urgent pointer
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1350
		// to point to the first non-urgent byte following the urgent data.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1351
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1352
		iFlags.iNextIsUrgent = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1353
		iSND.UP = iSND.UNA + iSockOutQLen + aLength;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1354
		LOG(Log::Printf(_L("\ttcp SAP[%u] Urgent pointer set, seq = %u"), (TInt)this, iSND.UP.Uint32()));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1355
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1356
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1357
	if (space <= 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1358
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1359
		LOG(Log::Printf(_L("\ttcp SAP[%u] FLOW STOPPED"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1360
		iSockFlags.iFlowStopped = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1361
		return 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1362
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1363
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1364
	// Append data to socket queue. 
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1365
	aLength = aBuf.Append(iSockOutQ, (aLength < space) ? aLength : space);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1366
	iSockOutQLen += aLength;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1367
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1368
	// We make a simple Nagle check here to avoid starting the transmitter unnecessarily.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1369
	// To spell it out:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1370
	// - If Cork option is set, always wait for full-sized segment before sending.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1371
	// - Without Cork option one under-sized segment is allowed to be outstanding.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1372
	// - TODO: With NoPush option segments are only sent when send buffer is full or
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1373
	//   when the connection is closed.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1374
	if (!iSND.WND)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1375
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1376
		// Start probing
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1377
		SchedRetransmit();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1378
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1379
	else if ((iPartialSeq <= iSND.UNA && !iFlags.iCork) ||
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1380
		iSND.UNA + iSockOutQLen + aLength >= iSND.NXT + effMSS ||
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1381
		iFlags.iNoDelay)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1382
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1383
		// Start transmitter
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1384
		SchedTransmit();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1385
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1386
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1387
	return aLength;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1388
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1389
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1390
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1391
TInt CProviderTCP6::Recv(TDualBufPtr& aBuf, TInt aLength, TUint aOptions)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1392
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1393
	LOG(Log::Printf(_L("GetData\ttcp SAP[%u] len=%d, options=%d"), (TInt)this, aLength, aOptions));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1394
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1395
	// Update iPending
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1396
	if (!(aOptions & KSocketInternalReadBit))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1397
		iPending -= aLength;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1398
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1399
	// This might happen when aborting a connection.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1400
	if (iSockInQ.IsEmpty())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1401
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1402
		LOG(Log::Printf(_L("\ttcp SAP[%u] No data available!"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1403
		return 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1404
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1405
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1406
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1407
	// Discard in-band urgent data junk
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1408
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1409
	while (iUpCount && UrgentOffset(0) == 0 && (!iFlags.iUrgentMode || UrgentOffset() > 0))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1410
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1411
		iSockInQ.TrimStart(1);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1412
		--iSockInQLen;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1413
		++iFreeWindow;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1414
		ForgetUrgentPointer();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1415
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1416
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1417
	ASSERT((aOptions & KSockReadPeek) || !iCopyOutOffset);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1418
	ASSERT(iCopyOutOffset + aLength <= (TInt)iSockInQLen);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1419
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1420
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1421
	// Peek. Copy from queue, fix counters and force receiver restart.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1422
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1423
	if (aOptions & KSockReadPeek)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1424
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1425
		LOG(Log::Printf(_L("\ttcp SAP[%u] Peek"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1426
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1427
		TInt err = aBuf.CopyIn(iSockInQ, iCopyOutOffset, aLength);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1428
		if (err != KErrNone)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1429
			return KErrNoMBufs;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1430
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1431
		if (!(aOptions & KSocketInternalReadBit))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1432
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1433
			iFlags.iCompleteRecv = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1434
			iNewData += aLength;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1435
			iCopyOutOffset += aLength;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1436
			iRecvQ.Wake();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1437
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1438
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1439
		return aLength;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1440
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1441
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1442
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1443
	// Normal read. Consume data from the queue.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1444
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1445
	// Note: aBuf.Consume() may return less than we asked
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1446
	// if it is unable to allocate an MBuf for splitting the
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1447
	// inbound queue. This can only happen with PRTv1.5.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1448
	// If we get nothing at all we return KErrNoMBufs here.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1449
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1450
	aLength = aBuf.Consume(iSockInQ, aLength, iBufAllocator);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1451
	if (aLength == 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1452
		return KErrNoMBufs;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1453
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1454
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1455
	// If we are now reading the actual urgent data, force the
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1456
	// application level read operation to complete and exit
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1457
	// urgent mode.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1458
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1459
	if (iFlags.iUrgentMode && UrgentOffset() == 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1460
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1461
		LOG(Log::Printf(_L("\ttcp SAP[%u] Reading urgent data. Clear urgent mode"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1462
		iFlags.iUrgentMode = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1463
		iFlags.iCompleteRecv = !(aOptions & KSocketInternalReadBit);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1464
		ForgetUrgentPointer();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1465
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1466
		
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1467
	iSockInQLen -= aLength;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1468
	
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1469
#ifdef SYMBIAN_ADAPTIVE_TCP_RECEIVE_WINDOW
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1470
	//Application is reading the data from the receive Q buffer
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1471
	//We need to make sure, that we will show that window is not shrinked
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1472
	//to the sender, so tha right edge of the sender window remains constant.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1473
	//if This is true, then it is a case of TCP window shrink and we need 
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1474
	//to handle it.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1475
	if ( iNewTcpWindow )
53
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
  1476
	    {
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
  1477
	    // Check if we can complete shrinking process
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
  1478
	    if ( aLength > iShrinkedWindowSize )
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
  1479
	        {
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
  1480
	        // We can exit from the shrinking process. Reset variables and
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
  1481
	        // update free window.
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
  1482
	        iFreeWindow = aLength - iShrinkedWindowSize;
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
  1483
	        iShrinkedWindowSize = 0;
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
  1484
	        iNewTcpWindow = 0;
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
  1485
	        }
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
  1486
	    else
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
  1487
	        {
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
  1488
	        // Substract the needed shrinking amount by the amount of bytes client
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
  1489
	        // read from the buffer
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
  1490
	        iShrinkedWindowSize -= aLength;
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
  1491
	        }
7e41d162e158 Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 40
diff changeset
  1492
	    }
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1493
	else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1494
#endif //SYMBIAN_ADAPTIVE_TCP_RECEIVE_WINDOW
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1495
	
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1496
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1497
		iFreeWindow += aLength;	
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1498
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1499
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1500
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1501
	// If we have read everything upto the urgent data,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1502
	// force the application level read to complete.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1503
	// If the urgent data has not yet been read, signal
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1504
	// the application again (read completion will clear
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1505
	// the signal).
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1506
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1507
	if (UrgentOffset() == 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1508
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1509
		iFlags.iCompleteRecv = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1510
		if (iFlags.iUrgentMode)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1511
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1512
			LOG(Log::Printf(_L("\ttcp SAP[%u] Now at urgent data"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1513
			iFlags.iNotifyUrgent = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1514
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1515
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1516
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1517
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1518
	// Increase receive window in multiples of RMSS
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1519
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1520
	// The following assumes that the path MTU is symmetric and that
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1521
	// the peer uses the same options as we do. We could use some
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1522
	// kind of peer effective MSS detection heuristic in order to
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1523
	// make this smarter.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1524
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1525
	TUint effMSS = EffectiveMSS();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1526
	if (iFreeWindow >= effMSS)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1527
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1528
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1529
		// Round down to nearest multiple of RMSS. However, be careful not to
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1530
		// shrink a previously advertised window.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1531
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1532
		iFreeWindow += iRCV.WND;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1533
		iRCV.WND = Max(iRCV.WND, effMSS * (iFreeWindow / effMSS));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1534
		iFreeWindow -= iRCV.WND;                   // Leave reminder for later.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1535
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1536
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1537
		// If our last advertised window is so small that the sender might
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1538
		// block before we would normally send our next ack, we will send
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1539
		// a window update. This will prevent the sender from unnecessarily
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1540
		// going into probe mode. We will only do this if we can advertise
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1541
		// at least half a window.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1542
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1543
		if (InState(ETcpEstablished|ETcpFinWait1|ETcpFinWait2))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1544
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1545
			if ((TInt)iAdvertisedWindow <= iSockInBufSize/4 && iRCV.WND >= iSockInBufSize/2)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1546
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1547
				LOG(Log::Printf(_L("\ttcp SAP[%u] Sending window update %d -> %d"), (TInt)this, iAdvertisedWindow, iRCV.WND));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1548
				SendSegment(KTcpCtlACK);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1549
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1550
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1551
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1552
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1553
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1554
	// If we have data that has not yet been announced to the socket server,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1555
	// make sure we get around to it.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1556
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1557
	if (iNewData)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1558
		iRecvQ.Wake();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1559
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1560
	LOG(Log::Printf(_L("GetData\ttcp SAP[%u] returns %d bytes, %d bytes pending"), (TInt)this, aLength, iPending));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1561
	return aLength;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1562
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1563
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1564
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1565
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1566
// Process ICMP Error. Treat it as a soft error unless we're trying to connect.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1567
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1568
void CProviderTCP6::IcmpError(TInt aError, TUint aOperationMask, TInt aType, TInt aCode,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1569
	const TInetAddr& aSrcAddr, const TInetAddr& aDstAddr, const TInetAddr& aErrAddr)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1570
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1571
	CProviderInet6Transport::IcmpError(aError,InState(ETcpSynSent|ETcpSynReceived) ?
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1572
		MSocketNotify::EErrorAllOperations : aOperationMask,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1573
		aType, aCode, aSrcAddr, aDstAddr, aErrAddr);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1574
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1575
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1576
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1577
// This routine maintains a sorted rotating array of detected urgent pointers.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1578
// The lowest detected UP is always stored in iUpArray[iUpIndex] and the highest
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1579
// one is stored in iUpArray[(iUpIndex + iUpCount - 1) % KTcpUpMax].
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1580
// If the array overflows, the lowest UP is always discarded.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1581
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1582
void CProviderTCP6::RememberUrgentPointer(TTcpSeqNum aUp)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1583
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1584
	// Insert new UP into the sorted list.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1585
	TInt i;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1586
	TTcpSeqNum up;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1587
	
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1588
	for (i = iUpIndex + iUpCount; i > iUpIndex; --i)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1589
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1590
		up = iUpArray[(i - 1) % KTcpUpMax];
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1591
		if (aUp > up)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1592
			break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1593
		if (aUp == up)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1594
			return;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1595
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1596
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1597
	if (i == iUpIndex && iUpCount == KTcpUpMax)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1598
		return;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1599
	TUint index;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1600
	while (i < iUpIndex + iUpCount)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1601
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1602
		index = i % KTcpUpMax;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1603
		up = iUpArray[index];
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1604
		iUpArray[index] = aUp;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1605
		aUp = up;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1606
		++i;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1607
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1608
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1609
	iUpArray[i % KTcpUpMax] = aUp;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1610
	if (iUpCount < KTcpUpMax)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1611
	    {
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1612
	    ++iUpCount;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1613
	    }
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1614
	else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1615
	    {
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1616
	    iUpIndex += 1;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1617
	    if(iUpIndex >= KTcpUpMax)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1618
	        iUpIndex -= KTcpUpMax;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1619
	    }
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1620
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1621
	iFlags.iUrgentMode = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1622
	iFlags.iNotifyUrgent = !iFlags.iOobInline;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1623
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1624
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1625
void CProviderTCP6::ForgetUrgentPointer()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1626
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1627
	if (iUpCount)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1628
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1629
		if (++iUpIndex >= KTcpUpMax)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1630
			iUpIndex = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1631
		--iUpCount;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1632
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1633
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1634
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1635
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1636
TInt CProviderTCP6::GetUrgent(TInt& aUrgentChar, TUint aOptions)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1637
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1638
	TTcpSeqNum up;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1639
	RMBuf *m;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1640
	TBool found = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1641
	TInt urgentOffset = UrgentOffset();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1642
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1643
	if (!iFlags.iUrgentMode || iFlags.iOobInline)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1644
		return KErrNotFound;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1645
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1646
	up = UrgentHigh();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1647
	if (up <= iRCV.NXT)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1648
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1649
		// It's in the socket queue.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1650
		if (urgentOffset == 0 && !(aOptions & KSockReadPeek))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1651
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1652
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1653
			// It's first in queue. Fetch it with Recv(), so that receive
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1654
			// window is correctly updated.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1655
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1656
			TBuf8<1> buf(1);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1657
			TDualBufPtr p(buf);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1658
			iNewData--;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1659
			Recv(p, 1, aOptions | KSocketInternalReadBit);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1660
			aUrgentChar = buf[0];
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1661
			LOG(Log::Printf(_L("\ttcp SAP[%u] GetUrgent(): Urgent char first in socket queue = %02x"), (TInt)this, aUrgentChar));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1662
			found = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1663
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1664
		else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1665
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1666
			for (m = iSockInQ.First(); m != NULL; m = m->Next())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1667
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1668
				if (urgentOffset < m->Length())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1669
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1670
					aUrgentChar = *(m->Ptr() + urgentOffset);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1671
					LOG(Log::Printf(_L("\ttcp SAP[%u] GetUrgent(): Urgent char in socket queue = %02x"), (TInt)this, aUrgentChar));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1672
					found = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1673
					break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1674
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1675
				urgentOffset -= m->Length();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1676
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1677
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1678
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1679
	else if (up <= iSND.WL1 + iRMSS)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1680
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1681
		// Maybe it's in the fragment queue.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1682
		TMBufPktQIter iter(iFragQ);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1683
		for (iter.SetToFirst(); iter.More(); iter++)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1684
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1685
			RMBufTcpFrag& frag = (RMBufTcpFrag&)iter.Current();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1686
			TTcpSeqNum seq = frag.Offset();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1687
			TUint32 len = frag.FragmentLength();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1688
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1689
			if (up <= seq)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1690
				break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1691
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1692
			if (up <= seq + len)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1693
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1694
				TTcpPacket seg(frag);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1695
				RMBuf *m, *prev;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1696
				TInt off, len;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1697
				frag.Goto(seg.iHdr->HeaderLength() + (up - seq) - 1,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1698
					m, off, len, prev);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1699
				aUrgentChar = *(m->Ptr() + off);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1700
				LOG(Log::Printf(_L("\ttcp SAP[%u] GetUrgent(): Urgent char in fragment queue = %02x"), (TInt)this, aUrgentChar));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1701
				found = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1702
				break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1703
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1704
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1705
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1706
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1707
	if (!found)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1708
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1709
		LOG(Log::Printf(_L("\ttcp SAP[%u] GetUrgent(): Would block"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1710
		return KErrWouldBlock;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1711
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1712
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1713
	if (!(aOptions & KSockReadPeek))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1714
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1715
		iFlags.iUrgentMode = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1716
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1717
		// Clear urgent mode exception flag
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1718
		if (iSockFlags.iNotify)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1719
			iSocket->Error(KErrNone, 0);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1720
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1721
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1722
	return KErrNone;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1723
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1724
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1725
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1726
void CProviderTCP6::Process(RMBufChain& aPacket, CProtocolBase* /*aSourceProtocol*/)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1727
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1728
	RMBufRecvInfo *const info = RMBufRecvPacket::PeekInfoInChain(aPacket);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1729
#ifdef SYMBIAN_NETWORKING_UPS
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1730
	if (info == NULL || (!HasNetworkServices() && (ConnectionInfoSet() == EFalse) && (info->iFlags & KIpLoopbackPacket) == 0))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1731
#else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1732
	if (info == NULL || (!HasNetworkServices() && (info->iFlags & KIpLoopbackPacket) == 0))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1733
#endif
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1734
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1735
		LOG(Log::Printf(_L("\ttcp SAP[%u] Not allowed to receive external packets"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1736
		aPacket.Free();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1737
		return;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1738
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1739
	iRecvQ.Append(aPacket);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1740
	iRecvQ.Wake();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1741
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1742
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1743
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1744
void CProviderTCP6::ErrorExpire(TInt aError)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1745
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1746
	LOG(Log::Printf(_L("\ttcp SAP[%u] ErrorExpire(): Closing SAP on fatal error: %d"), (TInt)this, aError));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1747
	if (!iSockFlags.iAttached)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1748
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1749
		Expire();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1750
		return;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1751
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1752
	Close();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1753
	CProviderInet6Transport::Error(aError);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1754
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1755
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1756
void CProviderTCP6::CanSend()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1757
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1758
	LOG(Log::Printf(_L("\ttcp SAP[%u] CanSend()"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1759
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1760
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1761
	// If the flow has become unblocked, process all missed events
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1762
	// and restart transmitter.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1763
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1764
	TInt flowStatus = iFlow.Status();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1765
	if (flowStatus < 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1766
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1767
		ErrorExpire(flowStatus);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1768
		return;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1769
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1770
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1771
	if (flowStatus == EFlow_READY)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1772
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1773
		LOG(Log::Printf(_L("\ttcp SAP[%u] CanSend(): Flow UNBLOCKED"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1774
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1775
		if (InState(ETcpListen|ETcpConnect))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1776
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1777
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1778
			// Get the SAP started.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1779
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1780
			if (InState(ETcpConnect))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1781
				SendSYN();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1782
			else if (InState(ETcpListen) && !iRecvQ.IsEmpty())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1783
				iRecvQ.Wake();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1784
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1785
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1786
		if (iFlags.iRetransmitPending)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1787
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1788
			iFlags.iRetransmitPending = EFalse;
40
d566d76acea1 Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 23
diff changeset
  1789
			if(RetransmitSegments())
d566d76acea1 Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 23
diff changeset
  1790
				return;
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1791
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1792
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1793
		if (iFlags.iTransmitPending)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1794
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1795
			iFlags.iTransmitPending = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1796
			SendSegments();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1797
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1798
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1799
		if (!iSendQ.IsEmpty())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1800
			iSendQ.Wake();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1801
			
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1802
		if (CanTriggerKeepAlive())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1803
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1804
			// The heaviest time check only if we are otherwise allowed to send the keepalive.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1805
			TUint32 time_now = TimeStamp();
58
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  1806
			if (time_now - iLastTriggeredKeepAlive > KTcpKeepAliveTH * KOneSecondInMs)
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1807
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1808
				iLastTriggeredKeepAlive = time_now;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1809
				LOG(Log::Printf(_L("\ttcp SAP[%u] CanSend(): Sending a Keep-Alive probe"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1810
				SendSegment(KTcpCtlACK, iSND.UNA - 1, 0);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1811
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1812
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1813
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1814
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1815
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1816
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1817
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1818
// This is the actual event driven asynchronous transmitter loop.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1819
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1820
void CProviderTCP6::Transmit()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1821
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1822
	LOG(Log::Printf(_L("\ttcp SAP[%u] Transmit"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1823
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1824
	RMBufSendPacket packet;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1825
	TInt flowStatus;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1826
	LOG(TInt count = 0);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1827
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1828
	ASSERT(!iSendQ.IsEmpty());
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1829
	RMBufSendInfo *info  = NULL;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1830
	// Transmit packets when flow is ready
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1831
	while ((flowStatus = iFlow.Status()) == EFlow_READY && iSendQ.Remove(packet))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1832
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1833
		info = packet.PeekInfo();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1834
		info->iFlow.Open(iFlow);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1835
		Protocol()->Send(packet);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1836
		LOG(count++);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1837
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1838
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1839
	// Local congestion control
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1840
	if (flowStatus == EFlow_HOLD && !iSendQ.IsEmpty())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1841
		SourceQuench();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1842
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1843
	LOG(Log::Printf(_L("\ttcp SAP[%u] %d segments transmitted"), (TInt)this, count));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1844
	LOG(if (flowStatus > EFlow_READY) Log::Printf(_L("\ttcp SAP[%u] Flow BLOCKED"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1845
	//LOG(if (flowStatus != EFlow_READY) Log::Printf(_L("CProviderTCP6::Transmit(): Flow status = %d.\r\n"), flowStatus));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1846
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1847
	if (flowStatus < 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1848
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1849
		LOG(Log::Printf(_L("\ttcp SAP[%u] Error %d. Segments"), (TInt)this, flowStatus));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1850
		ErrorExpire(flowStatus);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1851
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1852
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1853
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1854
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1855
// NOTE: There are a few tricks in the ECN implementation that should be considered. ECT bit MUST NOT
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1856
// be set in IP packets in the following cases [RFC 3168, Sec. 6.1.4 -- 6.1.6]:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1857
// 1) pure ACKs
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1858
// 2) retransmitted segments
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1859
// 3) zero window probes
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1860
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1861
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1862
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1863
// This routine generates and transmits a TCP segment.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1864
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1865
TInt CProviderTCP6::SendSegment(TUint8 aFlags, TTcpSeqNum aSeq, TUint32 aDataLen)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1866
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1867
	//LOG(Log::Printf(_L("CProviderTCP6::SendSegment(%06b,%d,%d)\r\n"),aFlags,aSeq,aMaxLen));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1868
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1869
	ASSERT(!(aFlags & KTcpCtlRST));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1870
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1871
	RMBufSendPacket seg;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1872
	RMBufSendInfo *info = NULL;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1873
	TInt err;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1874
	TInt up = iSND.UP - aSeq;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1875
	TInt seqLen = aDataLen;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1876
	if (aFlags & (KTcpCtlSYN|KTcpCtlFIN))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1877
	    ++seqLen;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1878
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1879
	if (iFlags.iEcnHaveCongestion)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1880
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1881
		aFlags |= KTcpCtlECE;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1882
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1883
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1884
	if (iFlags.iEcnSendCWR)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1885
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1886
		aFlags |= KTcpCtlCWR;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1887
		iFlags.iEcnSendCWR = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1888
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1889
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1890
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1891
	// Don't output SACK blocks with data segments
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1892
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1893
	iOptions.SuppressSack(aDataLen > 0);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1894
	TUint headerLen = KTcpMinHeaderLength + iOptions.Length();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1895
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1896
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1897
	// Allocate memory for TCP segment and IP headers.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1898
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1899
	// Important: we assume that, when using the TimeStamps option,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1900
	// iOptions always contains timestamps, so that the header length
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1901
	// does not change when we update them below.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1902
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1903
	for (;;)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1904
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1905
		TInt hdrReserve = iFlow.FlowContext()->HeaderSize() + headerLen;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1906
		if (aDataLen)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1907
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1908
			err = iSockOutQ.Copy(seg, aSeq - iSND.UNA, aDataLen, hdrReserve);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1909
			if(err == KErrNone)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1910
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1911
				err = seg.Prepend(hdrReserve, iBufAllocator);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1912
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1913
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1914
		else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1915
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1916
			err = seg.Alloc(hdrReserve, iBufAllocator);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1917
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1918
		if(err == KErrNone)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1919
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1920
			info = seg.NewInfo();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1921
			if(info)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1922
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1923
				break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1924
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1925
			else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1926
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1927
				err = KErrNoMBufs;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1928
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1929
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1930
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1931
		// Allocation failed. Try to recover.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1932
		seg.Free();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1933
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1934
		// Try to free up some memory. XXX - We could do better here.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1935
		if (!iFragQ.IsEmpty())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1936
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1937
			LOG(Log::Printf(_L("\ttcp SAP[%u] SendSegment(): RENEGE!!!"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1938
			iFragQ.Free();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1939
			continue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1940
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1941
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1942
		// If we can't scrounge up a buffer, the packet will be dropped.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1943
		LOG(Log::Printf(_L("\ttcp SAP[%u] SendSegment(): No memory, packet DROPPED!"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1944
		break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1945
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1946
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1947
	if (err == KErrNone)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1948
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1949
		// Reserve space for IP headers
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1950
		seg.TrimStart(iFlow.FlowContext()->HeaderSize());
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1951
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1952
		// Check for urgent data
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1953
		if (up > 0 && up < 0x10000)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1954
			aFlags |= KTcpCtlURG;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1955
		else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1956
			up = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1957
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1958
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1959
		// Fill in TCP header. Note that the header length has already
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1960
		// been set and the checksum will be calculated later.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1961
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1962
		// Note: If we're probing or the receiver has shrunk its advertised
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1963
		// window our iSND.NXT may be pointing beyond its advertised window.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1964
		// If the packet we're trying to send does not occupy any sequence
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1965
		// space, we will adjust the sequence number so that it falls withín
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1966
		// the receiver's window. This will make sure that our ACK and RST
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1967
		// packets will be accepted. In the worst case, a buggy receiver
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1968
		// might still ignore our window updates, which might lead to a probe
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1969
		// deadlock. Well, a TCP that shrinks its window without adjusting
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1970
		// SND.WL1 deserves what it gets...
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1971
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1972
		TTcpPacket pkt(seg);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1973
		TTcpSeqNum windowEdge = iSND.UNA + iSND.WND;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1974
		pkt.iHdr->SetSrcPort(iFlow.FlowContext()->LocalPort());
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1975
		pkt.iHdr->SetDstPort(iFlow.FlowContext()->RemotePort());
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1976
		pkt.iHdr->SetSequence(seqLen > 0 || aSeq <= windowEdge ? aSeq : windowEdge);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1977
		pkt.iHdr->SetAcknowledgment((aFlags & KTcpCtlACK) ? iRCV.NXT.Uint32() : 0);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1978
		if (aFlags & KTcpCtlSYN)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1979
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1980
			// Window scale must not be used in SYN or SYN-ACK segments.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1981
			// We do not truncate window size to be divisible by MSS.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1982
			// The next window advertisments are properly aligned, though.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1983
			pkt.iHdr->SetWindow(Min(iRCV.WND, 0xffff));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1984
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1985
		else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1986
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1987
			pkt.iHdr->SetWindow(iRCV.WND >> iRcvWscale);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1988
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1989
		pkt.iHdr->SetUrgent(up);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1990
		pkt.iHdr->SetControl(aFlags);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1991
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1992
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1993
		// Fill in info struct
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1994
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1995
		// coverity[dead_error_condition]
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1996
		// ASSERT statement required here as the condition "info != NULL" could be false
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1997
		ASSERT(info != NULL);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1998
		info->iProtocol = KProtocolInetTcp;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  1999
		info->iSrcAddr  = iFlow.FlowContext()->LocalAddr();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2000
		info->iDstAddr  = iFlow.FlowContext()->RemoteAddr();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2001
		info->iLength   = headerLen + aDataLen;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2002
		info->iFlags    = iFlags.iDoPMTUD ? KIpDontFragment : 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2003
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2004
		// Check if we have to clear the ECN ECT flag because of the few exception cases listed above.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2005
		if (iFlags.iEcn && (aSeq < iSND.NXT || aDataLen < 1))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2006
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2007
			info->iFlags |= KIpNoEcnEct;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2008
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2009
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2010
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2011
		// Output TCP options (except for RST packets)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2012
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2013
		if (!(aFlags & KTcpCtlRST))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2014
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2015
			// Get current time
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2016
			TUint32 usec = TimeStamp();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2017
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2018
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2019
			// Measure RTT
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2020
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2021
			if (iFlags.iUseTimeStamps)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2022
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2023
#if 0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2024
				// XXX - This code can cause tsVal to go backwards.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2025
				TUint32 lastSent, lastEchoed;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2026
				iOptions.TimeStamps(lastSent, lastEchoed);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2027
				if (usec == lastSent)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2028
					usec++;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2029
#endif
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2030
				iOptions.SetTimeStamps(usec, iTsRecent);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2031
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2032
			if (iFlags.iTiming)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2033
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2034
				// Check for retransmission. We shouldn't do RTT measurements on
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2035
				// retransmitted segments because of ambiguity (Karn algorithm).
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2036
				if (iTimingSeq > aSeq && iTimingSeq <= aSeq + aDataLen)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2037
					iFlags.iTiming = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2038
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2039
			else if (aSeq == iSND.NXT && seqLen > 0 && iSND.WND > 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2040
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2041
				// New segment and not a probe. Start timing.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2042
				iFlags.iTiming = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2043
				iTimingSeq = aSeq + aDataLen;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2044
				iTimeStamp = usec;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2045
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2046
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2047
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2048
			// Output TCP options into the segment header.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2049
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2050
			pkt.iHdr->SetOptions(iOptions);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2051
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2052
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2053
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2054
		// Compute checksum and send the segment.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2055
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2056
		pkt.ComputeChecksum(seg, info);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2057
		LOG(CProtocolTCP6::LogPacket('>', seg, info));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2058
		seg.Pack();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2059
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2060
       if(!iFlags.iFastRetransMode)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2061
           {
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2062
           iSendQ.Append(seg);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2063
           }
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2064
       else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2065
           {
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2066
           //If the fast retransmission mode is set then add the segment in the begining of the sendqueue.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2067
           iSendQ.Prepend(seg);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2068
           }
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2069
		iSendQ.Wake();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2070
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2071
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2072
	CancelDelayACK();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2073
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2074
	// Schedule a retransmission. Restart RTO if there was no outstanding segments, otherwise
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2075
	// it is only restarted if it was not running already.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2076
	if (seqLen)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2077
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2078
		if (iSND.NXT == iSND.UNA)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2079
			ReSchedRetransmit();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2080
		else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2081
			SchedRetransmit();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2082
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2083
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2084
	aSeq += seqLen;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2085
	if (aSeq > iSND.NXT)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2086
		iSND.NXT = aSeq;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2087
	iLastAck = iRCV.NXT;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2088
	iAdvertisedWindow = iRCV.WND;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2089
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2090
	return aDataLen;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2091
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2092
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2093
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2094
// Transmit one data segment at given position. Use current
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2095
// MTU, send window, and congestion window to limit segment
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2096
// size. Return number of bytes advanced in the transmit queue.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2097
// This may be less than transmitted bytes if SACK is being used.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2098
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2099
TInt CProviderTCP6::SendDataSegment(TTcpSeqNum aSeq, TBool aNagleOverride)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2100
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2101
	TInt effMSS = EffectiveMSS();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2102
#ifdef SIGNED_UNSIGNED_FIX //if user app set the value which is bigger than 0x7ffffff,The largest possible value for a TInt16.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2103
	TUint effWND = MinUU(iSND.WND, iSockOutQLen); 
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2104
#else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2105
	TUint effWND = Min(iSND.WND, iSockOutQLen);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2106
#endif
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2107
	TTcpSeqNum seq = aSeq;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2108
	TUint8 flags = KTcpCtlACK;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2109
	TInt len;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2110
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2111
	// If RTO just occurred and F-RTO processing is underway, override Nagle.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2112
	if (iFRTOsent)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2113
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2114
		aNagleOverride = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2115
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2116
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2117
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2118
	// Transmission guided by SACK (RFC2018)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2119
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2120
	if (iFlags.iSackOk)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2121
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2122
		TTcpSeqNum limitSeq, limit;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2123
		TInt awnd, sacked;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2124
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2125
		// Find a slot between SACKed blocks
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2126
		sacked = iSacked.FindGap(seq, limit);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2127
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2128
		if (iFlags.iFastRetransMode)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2129
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2130
			// Apply the FACK algorithm
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2131
			TTcpSeqNum fack = iSacked.Count() ? iSacked.Last()->iRight : iSND.UNA;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2132
			awnd = iCwnd - (iSND.NXT - fack);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2133
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2134
			// Allow at least one segment if there are no retransmits out.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2135
			// This combines new-Reno style retransmit behaviour with the
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2136
			// FACK algorithm. Pure FACK is somewhat tardy sending out the
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2137
			// first retransmit, which causes problems in the usual single
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2138
			// segment loss case.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2139
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2140
			if (iRetranData)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2141
				awnd -= iRetranData;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2142
			else if (awnd < (TInt)iSMSS)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2143
				awnd = iSMSS;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2144
			limitSeq = iSND.UNA + effWND;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2145
			LOG(Log::Printf(_L("\ttcp SAP[%u] SendDataSegment(): FAST RECOVERY: una=%u fack=%u awnd=%d"), (TInt)this, (iSND.UNA).Uint32(), fack.Uint32(), awnd));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2146
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2147
		else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2148
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2149
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2150
			// Apply congestion window and limited transmit window
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2151
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2152
			// Note: if there are SACKed blocks within the congestion window,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2153
			// the window is extended accordingly. This is compatible with
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2154
			// the congestion control principles, since we will not be
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2155
			// retransmitting the SACKed blocks.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2156
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2157
#ifdef SIGNED_UNSIGNED_FIX
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2158
			awnd = (TInt)MinUU(effWND, iCwnd + iLwnd + (TUint)Max(sacked, 0));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2159
#else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2160
			awnd = Min(effWND, iCwnd + iLwnd + (sacked < 0 ? 0 : sacked));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2161
#endif
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2162
			limitSeq = iSND.UNA + awnd;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2163
			LOG(Log::Printf(_L("\ttcp SAP[%u] SendDataSegment(): NORMAL MODE: una=%u limit=%u wnd=%u"), (TInt)this, (iSND.UNA).Uint32(), limitSeq.Uint32(), awnd));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2164
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2165
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2166
		if (sacked >= 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2167
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2168
			if (limit < limitSeq)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2169
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2170
				LOG(Log::Printf(_L("\ttcp SAP[%u] SendDataSegment(): SACK Adjust: RIGHT %u -> %u"), (TInt)this, limitSeq.Uint32(), limit.Uint32()));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2171
				limitSeq = limit;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2172
				if (limit <= seq + awnd)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2173
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2174
					LOG(Log::Printf(_L("\ttcp SAP[%u] SendDataSegment(): NAGLE override (SACK)"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2175
					aNagleOverride = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2176
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2177
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2178
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2179
		else if (iFlags.iFastRetransMode)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2180
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2181
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2182
			// We are beyond the last SACK block. Skip to new data.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2183
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2184
			LOG(Log::Printf(_L("\ttcp SAP[%u] SendDataSegment(): SACK Adjust: SEND NEW DATA"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2185
			iSendHigh = seq;  // Store position of SACK transmit
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2186
			seq = iSND.NXT;   // Start transmitting new data
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2187
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2188
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2189
		LOG(if (seq > aSeq) Log::Printf(_L("\ttcp SAP[%u] SendDataSegment(): SACK Adjust: LEFT %u -> %u"), (TInt)this, aSeq.Uint32(), seq.Uint32()));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2190
#ifdef SIGNED_UNSIGNED_FIX
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2191
		if(limitSeq > seq)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2192
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2193
			len = (TInt)MinUS(limitSeq - seq, awnd);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2194
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2195
		else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2196
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2197
			len = Min(limitSeq - seq, awnd);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2198
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2199
#else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2200
		len = Min(limitSeq - seq, awnd);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2201
#endif
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2202
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2203
	else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2204
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2205
#ifdef SIGNED_UNSIGNED_FIX
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2206
		len = iSND.UNA + MinUU(effWND, iCwnd + iLwnd) - seq;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2207
#else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2208
		len = iSND.UNA + Min(effWND, iCwnd + iLwnd) - seq;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2209
#endif
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2210
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2211
	LOG(Log::Printf(_L("\ttcp SAP[%u] SendDataSegment(%u, %d): una=%u nxt=%u off=%d noff=%d len=%d"),
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2212
		(TInt)this, aSeq.Uint32(), aNagleOverride, (iSND.UNA).Uint32(), (iSND.NXT).Uint32(), aSeq - iSND.UNA, seq - iSND.UNA, len));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2213
	LOG(Log::Printf(_L("\ttcp SAP[%u] Transmit state:  effMSS=%d iCwnd=%d iLwnd=%d effWND=%d iRetranData=%d recovery=%d"),
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2214
		(TInt)this, effMSS, iCwnd, iLwnd, effWND, iRetranData, iFlags.iFastRetransMode));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2215
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2216
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2217
	// Sender side SWS avoidance and Nagle.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2218
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2219
	if (len <= 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2220
		len = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2221
	else if (len >= effMSS)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2222
		len = effMSS;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2223
	else if (seq > iSND.NXT && seq + len < iSND.UNA + iSockOutQLen && !aNagleOverride)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2224
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2225
	// Nagle override is not on and we're trying to send a partial
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2226
	// segment from the middle of the send queue. Therefore, we must
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2227
	// be constrained by the receiver window or the congestion window.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2228
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2229
	// If receiver window is very small we must allow a small packet out.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2230
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2231
	len = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2232
	else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2233
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2234
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2235
		// Minshall's modification to the Nagle algorithm. We are
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2236
		// allowed to transmit a partial segment if there are no
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2237
		// other unacknowledged partial segments in flight.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2238
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2239
		if (iPartialSeq <= iSND.UNA && !Protocol()->StrictNagle() && !iFlags.iCork)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2240
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2241
			LOG(Log::Printf(_L("\ttcp SAP[%u] SendDataSegment(): NAGLE override (Minshall), seq=%u"), (TInt)this, seq.Uint32()));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2242
			aNagleOverride = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2243
			iPartialSeq = seq + len;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2244
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2245
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2246
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2247
		// Standard Nagle algorithm. Do not send partial packets
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2248
		// if there are outstanding unacknowledged segments.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2249
		// We also refrain from sending small packets if we have
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2250
		// blocked the application as that means our send buffer
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2251
		// is full.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2252
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2253
		// Update: With Cork option enabled, only full-sized segments are sent
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2254
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2255
		// Note that we temporarily disable Nagle if we have
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2256
		// some urgent data to send or if the user has already
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2257
		// closed the outgoing direction of the connection.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2258
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2259
		if((iSockFlags.iFlowStopped || iSND.UNA < seq || iFlags.iCork)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2260
			&& iSND.UP <= seq && !iFlags.iNoDelay
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2261
			&& !iSockFlags.iSendClose && !aNagleOverride)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2262
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2263
			LOG(Log::Printf(_L("\ttcp SAP[%u] SendDataSegment(): NAGLE kicked in"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2264
			len = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2265
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2266
		else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2267
			flags |= KTcpCtlPSH;  // Set PSH on all partial segments
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2268
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2269
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2270
	if (len)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2271
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2272
		if (seq + len == iSND.UNA + iSockOutQLen)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2273
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2274
			// Send queue has drained. Set PSH if application is not blocked.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2275
			if (!iSockFlags.iFlowStopped)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2276
				flags |= KTcpCtlPSH;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2277
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2278
			// Set FIN if the socket is closing.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2279
			if (iSockFlags.iSendClose)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2280
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2281
				flags |= KTcpCtlFIN;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2282
				if (InState(ETcpEstablished|ETcpCloseWait))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2283
					EnterState(InState(ETcpEstablished) ? ETcpFinWait1 : ETcpLastAck);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2284
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2285
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2286
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2287
		if (len = SendSegment(flags, seq, len), len >= 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2288
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2289
			// Count retransmitted data for FACK
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2290
			if (iSacked.Count() && seq < iSacked.Last()->iRight)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2291
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2292
				iSendHigh = seq + len;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2293
				if (iFlags.iFastRetransMode)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2294
					iRetranData += len;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2295
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2296
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2297
			// Take SACK advance into account
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2298
			len += (seq - aSeq);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2299
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2300
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2301
	else if (iSND.WND < (TUint)effMSS)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2302
		SchedRetransmit(); // Start probing
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2303
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2304
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2305
	// Return the number of bytes by which to advance transmit sequence.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2306
	// Note: With SACK this is not necessarily the number of bytes sent.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2307
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2308
	return len;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2309
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2310
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2311
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2312
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2313
// Send multiple data segments.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2314
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2315
void CProviderTCP6::SendSegments(TBool aNagleOverride)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2316
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2317
	LOG(Log::Printf(_L("\ttcp SAP[%u] SendSegments(): queue=%u wnd=%u cwnd=%u, ssthresh=%u"),
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2318
		(TInt)this, iSockOutQLen, iSND.WND, iCwnd, iSsthresh));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2319
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2320
	iFlags.iTransmitPending = (iFlow.Status() == EFlow_PENDING);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2321
	if (iFlags.iTransmitPending)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2322
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2323
		LOG(Log::Printf(_L("\ttcp SAP[%u] SendSegments(): Flow pending"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2324
		return;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2325
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2326
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2327
	if (InState(ETcpSynReceived|ETcpEstablished|ETcpCloseWait|ETcpLastAck|ETcpFinWait1|ETcpClosing))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2328
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2329
		TInt advance;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2330
		TUint count = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2331
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2332
		if (iTransmitSeq < iSND.UNA)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2333
			iTransmitSeq = iSND.UNA;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2334
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2335
		// Transmit segments from queue
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2336
		while (advance = SendDataSegment(iTransmitSeq, aNagleOverride), advance > 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2337
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2338
			iTransmitSeq += advance;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2339
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2340
			// Limit transmission to KTcpMaxTransmit segments during
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2341
			// fast retransmit/recovery.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2342
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2343
			if (iFlags.iFastRetransMode && ++count >= Protocol()->MaxBurst())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2344
				break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2345
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2346
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2347
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2348
		// User has closed the connection and send queue has drained?
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2349
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2350
		// Note: Normally the FIN bit is slapped on the last data segment
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2351
		// in SendDataSegment(). However, if we have to send a FIN segement
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2352
		// with no data, we do it here.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2353
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2354
		if (iSockFlags.iSendClose && 
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2355
			((InState(ETcpEstablished|ETcpCloseWait) &&	iSND.NXT == iSND.UNA + iSockOutQLen && advance >= 0) ||
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2356
			(InState(ETcpSynReceived) && iSockFlags.iRecvClose)))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2357
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2358
			EnterState(InState(ETcpSynReceived|ETcpEstablished) ? ETcpFinWait1 : ETcpLastAck);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2359
			SendSegment(KTcpCtlFIN|KTcpCtlACK);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2360
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2361
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2362
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2363
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2364
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2365
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2366
// Handle retransmission timeout
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2367
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2368
// The retransmission timer is shared for multiple purposes.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2369
// There are different reasons why we might end up here:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2370
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2371
//   1) A normal retransmission timeout. In this case, iSND.NXT > iSND.UNA.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2372
//   2) We are probing a zero window. In this case iSND.WND == 0.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2373
//   3) The Nagle override timeout has expired. In this case,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2374
//      iSND.WND != 0 and unsent < effMSS.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2375
//   4) TIME-WAIT or FIN-WAIT-2 timeout.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2376
//   5) If TCP keepalive option is set, expiry of the keepalive timer
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2377
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2378
void CProviderTCP6::RetransmitTimeout()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2379
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2380
	LOG(Log::Printf(_L("\ttcp SAP[%u] RetransmitTimeout(): backoff=%d"), (TInt)this, iBackoff));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2381
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2382
	TUint maxRetries = InState(ETcpSynSent|ETcpSynReceived)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2383
		? Protocol()->SynRetries() : Protocol()->Retries2();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2384
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2385
	// Handle backoff and expiration
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2386
	if (iSND.NXT > iSND.UNA || iSND.WND == 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2387
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2388
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2389
		// Exponential backoff.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2390
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2391
		++iBackoff;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2392
		if (iRTO < Protocol()->MaxRTO())  // Avoid RTO overflow
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2393
			ResetRTO();
40
d566d76acea1 Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 23
diff changeset
  2394
		
d566d76acea1 Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 23
diff changeset
  2395
		if(DetachIfDead())
d566d76acea1 Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 23
diff changeset
  2396
			{
d566d76acea1 Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 23
diff changeset
  2397
			Expire();
d566d76acea1 Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 23
diff changeset
  2398
			return;
d566d76acea1 Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 23
diff changeset
  2399
			}
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2400
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2401
		// Timeout?
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2402
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2403
		// Note: we time out if this is a connect attempt or a retransmission,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2404
		// but we must not time out if we're probing a zero window.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2405
		// Exception: probing timeouts if application has closed and we have zero window
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2406
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2407
		if ((iBackoff > maxRetries) &&
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2408
			(iSND.WND > 0 
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2409
			|| InState(ETcpSynSent|ETcpSynReceived) 
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2410
			|| (iSockFlags.iSendClose && iSockFlags.iRecvClose)))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2411
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2412
			LOG(Log::Printf(_L("\ttcp SAP[%u] RetransmitTimeout(): TCP timed out"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2413
			ErrorExpire(iLastError.iStatus != KErrNone ? iLastError.iStatus : KErrTimedOut);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2414
			return;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2415
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2416
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2417
		// Simple black hole detection for PMTUD. Currently, we never try to re-enable
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2418
		// PMTUD after hitting a black hole.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2419
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2420
		if (iBackoff > Protocol()->Retries1() && iSND.WND > 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2421
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2422
			iFlags.iDoPMTUD = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2423
			iSMSS = Min(iSMSS, KTcpStandardMSS);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2424
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2425
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2426
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2427
	else if (iFlags.iHaveKeepAlive && !iSockOutQLen && InState(ETcpEstablished | ETcpCloseWait))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2428
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2429
		KeepAliveTimeout();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2430
		return;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2431
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2432
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2433
	// TIME-WAIT or FIN-WAIT-2 timeout
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2434
	if (InState(ETcpTimeWait) || (InState(ETcpFinWait2) && iSockFlags.iRecvClose))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2435
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2436
		Expire();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2437
		return;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2438
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2439
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2440
	// Not dead yet. Go retransmit some segments.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2441
	RetransmitSegments();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2442
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2443
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2444
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2445
void CProviderTCP6::KeepAliveTimeout()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2446
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2447
	// Keepalive timer expired. Because 32-bit microseconds are not enough for the minimum keepalive
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2448
	// timeout of two hours, the keepalive interval needs to be consumed one hour at a time.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2449
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2450
	ASSERT(iRetransTimer);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2451
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2452
	if (iBackoff >= Protocol()->NumKeepAlives())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2453
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2454
		// No response from the peer. Terminate connection
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2455
		LOG(Log::Printf(_L("\ttcp SAP[%u] KeepAliveTimeout(): No response to Keep-Alive probes. Closing connection"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2456
		ErrorExpire(KErrTimedOut);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2457
		return;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2458
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2459
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2460
	TUint32 usec = TimeStamp();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2461
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2462
	if (!iLastTimeout)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2463
		iLastTimeout = usec;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2464
58
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  2465
	TUint32 distance = (usec - iLastTimeout) / KOneSecondInMs;  // seconds
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2466
	TUint32 interval = iBackoff ? Protocol()->KeepAliveRxmt() : Protocol()->KeepAliveIntv();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2467
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2468
	if (distance > interval)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2469
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2470
		// Send a keepalive probe. If no ack arrives, next one is sent after a shorter time (75 s)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2471
		LOG(Log::Printf(_L("\ttcp SAP[%u] KeepAliveTimeout(): Sending a Keep-Alive probe"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2472
		SendSegment(KTcpCtlACK, iSND.UNA - 1, 0);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2473
		iBackoff++;
58
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  2474
		iRetransTimer->Restart(Protocol()->KeepAliveRxmt() * KOneSecondInUs);
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2475
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2476
	else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2477
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2478
		// This branch is entered when the first keepalive has to be issued after an idle period.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2479
		distance = Protocol()->KeepAliveIntv() - distance;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2480
		iRetransTimer->Restart((distance > 1800) ?
58
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  2481
			1800 * KOneSecondInUs : (distance * KOneSecondInUs));
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2482
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2483
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2484
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2485
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2486
void CProviderTCP6::ResetKeepAlives()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2487
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2488
	ASSERT(iRetransTimer);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2489
	iRetransTimer->Restart((Protocol()->KeepAliveIntv() > 1800) ?
58
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  2490
		1800 * KOneSecondInUs : (Protocol()->KeepAliveIntv() * KOneSecondInUs));
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2491
	// Backoff is used for counting unacknowledged keepalive retransmissions during idle periods
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2492
	iBackoff = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2493
	iLastTimeout = TimeStamp();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2494
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2495
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2496
inline TBool CProviderTCP6::CanTriggerKeepAlive()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2497
	{ 
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2498
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2499
	// We can only send keep-alive if we're idle and established.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2500
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2501
	return iFlags.iHaveTriggeredKeepAlive
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2502
		&& !iSockOutQLen 
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2503
		&& iSendQ.IsEmpty()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2504
		&& InState(ETcpEstablished) 
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2505
		&& iSND.NXT == iSND.UNA 
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2506
		&& iSND.WND > 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2507
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2508
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2509
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2510
// Try to retransmit segments. This routine gets called from two places:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2511
//  - directly from RetransmitTimeout()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2512
//  - from CanSend(), in which case this is a delayed retransmission timeout
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2513
//
40
d566d76acea1 Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 23
diff changeset
  2514
TBool CProviderTCP6::RetransmitSegments()
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2515
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2516
	ASSERT(iRetransTimer);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2517
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2518
	LOG(Log::Printf(_L("\ttcp SAP[%u] RetransmitSegments(): queue=%u wnd=%u cwnd=%u, ssthresh=%u dupacks=%d"),
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2519
		(TInt)this, iSockOutQLen, iSND.WND, iCwnd, iSsthresh, iDupAcks));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2520
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2521
	TInt unacked = Min(iSND.NXT - iSND.UNA, iSockOutQLen);  // Adjust for FIN
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2522
	TInt effMSS = EffectiveMSS();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2523
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2524
	// Delay retransmission if the flow is pending
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2525
	iFlags.iRetransmitPending = (iFlow.Status() == EFlow_PENDING);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2526
	if (iFlags.iRetransmitPending)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2527
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2528
		LOG(Log::Printf(_L("\ttcp SAP[%u] RetransmitSegments(): Flow pending"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2529
		ReSchedRetransmit();
40
d566d76acea1 Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 23
diff changeset
  2530
		return EFalse;
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2531
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2532
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2533
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2534
	// Handle retransmission of data segments and zero window probing.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2535
	// We must have something in output queue. SYN or FIN retransmissions
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2536
	// and TIME-WAIT or FIN-WAIT-2 timeouts are handled later.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2537
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2538
	if (iSockOutQLen && InState(ETcpEstablished|ETcpFinWait1|ETcpClosing|ETcpCloseWait|ETcpLastAck))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2539
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2540
		if (iSND.WND == 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2541
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2542
			LOG(Log::Printf(_L("\ttcp SAP[%u] RetransmitSegments(): Window PROBE"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2543
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2544
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2545
			// We are probing a zero window.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2546
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2547
			switch (Protocol()->ProbeStyle())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2548
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2549
			case 1:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2550
				// Probe with a full segment (BSD style)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2551
				SendSegment(KTcpCtlACK, iSND.UNA, Min(iSockOutQLen - unacked, effMSS));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2552
				break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2553
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2554
			case 2:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2555
				//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2556
				// Probe with a below-window ACK (Linux style).
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2557
				//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2558
				// Note:   SendSegment() does not allow sending an above-window ACK.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2559
				//         Below-window ACK is fine, though.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2560
				//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2561
				// Note 2: If we have urgent data to send, we fall back on standard probe.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2562
				//         since a pure ack can not deliver the urgent pointer.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2563
				//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2564
				if (iSND.UP <= iSND.UNA)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2565
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2566
					SendSegment(KTcpCtlACK, iSND.UNA - 1);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2567
					SchedRetransmit();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2568
					break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2569
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2570
				// Fall through
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2571
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2572
			default:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2573
				// Standard probe. We use a single byte to probe a zero window.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2574
				SendSegment(KTcpCtlACK, iSND.UNA, 1);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2575
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2576
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2577
			// Note 1: With probes including data iSND.NXT will now be pointing beyond
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2578
			// the advertised window of the receiver! This will allow us to accept the
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2579
			// incoming probe ack without any special hacks. However, it also means
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2580
			// that if we send an ACK or RST, we need to make sure the sequence number
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2581
			// is within the receiver window! SendSegment() now makes this adjustment
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2582
			// as a special case.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2583
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2584
			// Note 2: We may also end up with iSND.NXT pointing beyond the window if
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2585
			// the receiver suddenly shrinks its window. The current solution covers
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2586
			// both cases.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2587
			//
40
d566d76acea1 Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 23
diff changeset
  2588
			return EFalse;
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2589
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2590
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2591
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2592
		// This is a retransmit timout. Do we have anything to do?
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2593
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2594
		if (!unacked)
40
d566d76acea1 Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 23
diff changeset
  2595
			return EFalse;
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2596
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2597
		LOG(if (iFlags.iFastRetransMode) Log::Printf(_L("\ttcp SAP[%u] RetransmitSegments(): Leaving FAST RETRANS mode"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2598
		iFlags.iFastRetransMode = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2599
		iDupAcks = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2600
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2601
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2602
		// Congestion control
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2603
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2604
		iSsthresh = Max((iSND.NXT - iSND.UNA) / 2, 2 * iSMSS);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2605
		iCwnd = EffectiveMSS();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2606
		iLwnd = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2607
		iRetranData = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2608
		iPartialSeq = iSND.UNA;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2609
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2610
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2611
		// The receiver may have reneged. Clear SACK info.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2612
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2613
		// Only clear the SACK queue if we have a SACKed block immediately
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2614
		// after iSND.UNA. In this case the sender has clearly reneged.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2615
		// If the peer does this even once, we will no longer trust it
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2616
		// to retain its above-sequence queue and will revert to the normal
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2617
		// RFC2018 behaviour of clearing all SACK info on retransmit timeout.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2618
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2619
		if (!iFlags.iSackOk || (iFlags.iPeerHasReneged ||
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2620
			(iSacked.Count() && iSacked.First()->iLeft == iSND.UNA)))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2621
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2622
			if (iFlags.iSackOk)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2623
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2624
				LOG(if(!iFlags.iPeerHasReneged) Log::Printf(_L("\ttcp SAP[%u] RetransmitSegments(): Peer reneged"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2625
				iFlags.iPeerHasReneged = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2626
				iSacked.Clear();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2627
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2628
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2629
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2630
			// New reno "bugfix" [RFC2582] is applied only if we are forced
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2631
			// to discard the SACK info. If we can keep the info we will
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2632
			// never send spurious retransmits and thus there will be no
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2633
			// dupacks to trigger fast recovery, unless segments have
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2634
			// really been lost.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2635
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2636
			iSendHigh = iSND.NXT;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2637
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2638
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2639
		iRealSendHigh = iSND.NXT;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2640
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2641
		// Save timestamp for delay spike detection
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2642
		if (iFlags.iUseTimeStamps)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2643
			iLastTimeout = TimeStamp();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2644
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2645
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2646
		// Retransmit segments.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2647
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2648
		if (Protocol()->FRTO())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2649
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2650
			// F-RTO: Send first unacknowledged segment and continue transmitting new data
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2651
			iFRTOsent = 1;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2652
			SendDataSegment(iSND.UNA, ETrue);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2653
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2654
		else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2655
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2656
			// Normal retransmit
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2657
			iTransmitSeq = iSND.UNA;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2658
			SendSegments(ETrue);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2659
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2660
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2661
		// Store retransmit sequence for SACK retransmit
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2662
		if (iTransmitSeq > iSendHigh && !iFRTOsent)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2663
			iSendHigh = iTransmitSeq;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2664
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2665
		// If the server doesn't respond because of broken NAT/FW or other, don't keep interface up.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2666
		if (InState(ETcpFinWait1|ETcpClosing|ETcpLastAck))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2667
			DetachIfDead();
40
d566d76acea1 Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 23
diff changeset
  2668
		return EFalse;
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2669
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2670
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2671
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2672
	// Ok, this is either a SYN/FIN retransmit or a TIME-WAIT/FIN-WAIT-2 timeout.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2673
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2674
	if (InState(ETcpSynSent))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2675
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2676
		// Retransmit SYN
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2677
		SendSegment(KTcpCtlSYN, iSND.UNA);
40
d566d76acea1 Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 23
diff changeset
  2678
		return EFalse;
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2679
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2680
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2681
	if (InState(ETcpSynReceived))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2682
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2683
		// Retransmit SYN,ACK
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2684
		SendSegment(KTcpCtlSYN|KTcpCtlACK, iSND.UNA);
40
d566d76acea1 Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 23
diff changeset
  2685
		return EFalse;
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2686
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2687
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2688
	if (InState(ETcpFinWait1|ETcpClosing|ETcpLastAck))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2689
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2690
		// If the server doesn't respond because of broken NAT/FW or other, don't keep interface up.
12
e9cc36e353d4 Revision: 201013
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
  2691
	
e9cc36e353d4 Revision: 201013
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
  2692
	    //TSW error:JHAA-82JBNG -- FIN retransmission 
e9cc36e353d4 Revision: 201013
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
  2693
		//Depending on the function return value the decision to
e9cc36e353d4 Revision: 201013
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
  2694
	    //retransmitt FIN is decided
40
d566d76acea1 Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 23
diff changeset
  2695
	
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2696
		// Retransmit FIN
40
d566d76acea1 Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 23
diff changeset
  2697
		if(DetachIfDead()== EFalse)
d566d76acea1 Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 23
diff changeset
  2698
			{
12
e9cc36e353d4 Revision: 201013
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
  2699
			SendSegment(KTcpCtlFIN|KTcpCtlACK, iSND.UNA);
40
d566d76acea1 Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 23
diff changeset
  2700
			return EFalse;
d566d76acea1 Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 23
diff changeset
  2701
			}
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2702
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2703
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2704
	LOG(Log::Printf(_L("\ttcp SAP[%u] RetransmitSegments(): Retransmitter stopping"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2705
	if (!iSockFlags.iAttached)
40
d566d76acea1 Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 23
diff changeset
  2706
		{
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2707
		Expire();
40
d566d76acea1 Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 23
diff changeset
  2708
		return ETrue;
d566d76acea1 Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 23
diff changeset
  2709
		}
d566d76acea1 Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 23
diff changeset
  2710
	return EFalse;
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2711
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2712
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2713
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2714
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2715
// Respond to an explicit congestion control signal.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2716
// Currently, the signal can come from the link layer
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2717
// or from the network as an ICMP source quench.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2718
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2719
TBool CProviderTCP6::SourceQuench()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2720
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2721
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2722
	// Allow source quenching approximately once per window.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2723
	// Note: the test is written in such a way that iQuenchSeq
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2724
	// does not need to be updated during normal TCP operation.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2725
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2726
	// Do not shrink the congestion window if we're doing fast
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2727
	// retransmits. That would mess up the congestion window
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2728
	// deflation when exiting fast retransmit mode.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2729
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2730
	if (iQuenchSeq.Outside(iSND.NXT, iSND.NXT + iSND.WND) && !iFlags.iFastRetransMode)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2731
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2732
		iSsthresh = Max((iSND.NXT - iSND.UNA) / 2, 2 * iSMSS);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2733
		iCwnd = iSsthresh;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2734
		iQuenchSeq = iSND.NXT + iSND.WND;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2735
		LOG(Log::Printf(_L("\ttcp SAP[%u] SourceQuench(): flight=%d, cwnd=%d, ssthresh=%d"),
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2736
			(TInt)this, iSND.NXT - iSND.UNA, iCwnd, iSsthresh));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2737
		return ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2738
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2739
	return EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2740
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2741
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2742
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2743
TInt CProviderTCP6::SenderCallBack(TAny* aProviderTCP)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2744
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2745
	LOG(Log::Printf(_L("<>\ttcp SAP[%u] SenderCallBack"), (TInt)aProviderTCP));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2746
	((CProviderTCP6*)aProviderTCP)->SendSegments();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2747
	return 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2748
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2749
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2750
TInt CProviderTCP6::ReceiverCallBack(TAny* aProviderTCP)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2751
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2752
	LOG(Log::Printf(_L("<>\ttcp SAP[%u] ReceiverCallBack"), (TInt)aProviderTCP));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2753
	((CProviderTCP6*)aProviderTCP)->ProcessSegments();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2754
	return 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2755
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2756
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2757
TInt CProviderTCP6::DelayAckCallBack(TAny* aProviderTCP)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2758
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2759
	LOG(Log::Printf(_L("<>\ttcp SAP[%u] DelayAckCallBack"), (TInt)aProviderTCP));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2760
	((CProviderTCP6*)aProviderTCP)->SendSegment(KTcpCtlACK);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2761
	return 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2762
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2763
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2764
TInt CProviderTCP6::TransmitterCallBack(TAny* aProviderTCP)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2765
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2766
	LOG(Log::Printf(_L("<>\ttcp SAP[%u] TransmitterCallBack"), (TInt)aProviderTCP));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2767
	((CProviderTCP6*)aProviderTCP)->Transmit();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2768
	return 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2769
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2770
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2771
TInt CProviderTCP6::RetransmitterCallBack(TAny* aProviderTCP)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2772
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2773
	LOG(Log::Printf(_L("<>\ttcp SAP[%u] RetransmitterCallback"), (TInt)aProviderTCP));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2774
	((CProviderTCP6*)aProviderTCP)->RetransmitTimeout();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2775
	return 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2776
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2777
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2778
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2779
TInt CProviderTCP6::LingerTimerCallBack(TAny *aProviderTCP)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2780
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2781
	LOG(Log::Printf(_L("<>\ttcp SAP[%u] Linger timeout()"), (TInt)aProviderTCP));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2782
	((CProviderTCP6*)aProviderTCP)->Detach();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2783
	return 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2784
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2785
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2786
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2787
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2788
// Initialize SRTT measurement
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2789
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2790
void CProviderTCP6::ClearRTT()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2791
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2792
	iSRTT = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2793
	iMDEV = Protocol()->MdevSmooth() * Protocol()->InitialRTO();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2794
	if (Protocol()->RTO_K())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2795
		iMDEV /= Protocol()->RTO_K();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2796
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2797
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2798
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2799
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2800
// Update RTO using van Jacobson's algorithm
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2801
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2802
void CProviderTCP6::UpdateRTO(TUint32 aRTT)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2803
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2804
	if (!iSRTT && aRTT > Protocol()->InitialRTO() / 2)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2805
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2806
		iSRTT = Protocol()->SrttSmooth() * aRTT;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2807
		iMDEV = Protocol()->MdevSmooth() * aRTT / 2;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2808
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2809
	else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2810
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2811
		TInt delta = aRTT - (iSRTT / Protocol()->SrttSmooth()); // delta >= -iSRTT
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2812
		iSRTT += delta;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2813
		if (!iSRTT)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2814
			iSRTT = 1;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2815
		if (delta < 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2816
			delta = -delta;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2817
		delta -= (iMDEV / Protocol()->MdevSmooth()); // delta >= -iMDEV
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2818
		iMDEV += delta;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2819
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2820
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2821
	ResetRTO();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2822
	LOG(Log::Printf(_L("\ttcp SAP[%u] UpdateRTO(): RTT=%d SRTT=%d MDEV=%d BACKOFF=%d RTO=%d"),
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2823
		(TInt)this, aRTT, iSRTT / Protocol()->SrttSmooth(), iMDEV / Protocol()->MdevSmooth(), iBackoff, iRTO));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2824
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2825
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2826
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2827
// Calculate RTO with backoff
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2828
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2829
void CProviderTCP6::ResetRTO()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2830
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2831
	iRTO = (iSRTT / Protocol()->SrttSmooth()) +
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2832
		Max(Protocol()->RTO_K() * iMDEV / Protocol()->MdevSmooth(), Protocol()->RTO_G());
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2833
	if (iRTO < Protocol()->MinRTO())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2834
		iRTO = Protocol()->MinRTO();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2835
	iRTO <<= iBackoff;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2836
	if (iRTO > Protocol()->MaxRTO())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2837
		iRTO = Protocol()->MaxRTO();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2838
	LOG(Log::Printf(_L("\ttcp SAP[%u] ResetRTO(): SRTT=%d MDEV=%d BACKOFF=%d RTO=%d"),
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2839
		(TInt)this, iSRTT / Protocol()->SrttSmooth(), iMDEV / Protocol()->MdevSmooth(), iBackoff, iRTO));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2840
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2841
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2842
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2843
// Set initial congestion window
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2844
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2845
void CProviderTCP6::ResetCwnd(TUint aSMSS)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2846
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2847
	if (Protocol()->RFC2414())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2848
		iCwnd = Min(4 * aSMSS, Max(2 * aSMSS, 4380));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2849
	else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2850
		iCwnd = Protocol()->InitialCwnd() * aSMSS;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2851
	LOG(Log::Printf(_L("\ttcp SAP[%u] ResetCwnd(): cwnd=%d"), (TInt)this, iCwnd));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2852
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2853
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2854
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2855
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2856
// Schedule a FIN-WAIT-2 or TIME-WAIT timeout
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2857
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2858
void CProviderTCP6::SchedMsl2Wait()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2859
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2860
	ASSERT(iRetransTimer);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2861
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2862
	iBackoff = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2863
	iRetransTimer->Restart(Protocol()->Msl2Delay());
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2864
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2865
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2866
	// Remove this SAP from the user socket count.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2867
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2868
	DetachFromInterface();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2869
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2870
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2871
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2872
// Detach the SAP if the application has closed and we seem to keep resending stuff.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2873
//
12
e9cc36e353d4 Revision: 201013
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
  2874
TBool CProviderTCP6::DetachIfDead()
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2875
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2876
	if (iSockFlags.iRecvClose && iSockFlags.iSendClose && Protocol()->FinPersistency()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2877
		&& iBackoff >= Protocol()->FinPersistency())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2878
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2879
		LOG(Log::Printf(_L("\ttcp SAP[%u] Peer looks dead while %d bytes unacked data. Detach!"), 
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2880
			(TInt)this, Min(iSND.NXT - iSND.UNA, iSockOutQLen)));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2881
		DetachFromInterface();
12
e9cc36e353d4 Revision: 201013
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
  2882
		
e9cc36e353d4 Revision: 201013
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
  2883
		//TSW error:JHAA-82JBNG -- FIN retransmission 
e9cc36e353d4 Revision: 201013
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
  2884
		//The FinPersistency value read from the tcpip.ini file determines
e9cc36e353d4 Revision: 201013
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
  2885
		//the number of times FIN should be retransmitted
e9cc36e353d4 Revision: 201013
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
  2886
		//Once we reach the maximum value the DetachFromInterface() is called
e9cc36e353d4 Revision: 201013
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
  2887
		//and we return ETrue. 
e9cc36e353d4 Revision: 201013
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
  2888
		return ETrue;
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2889
		}
12
e9cc36e353d4 Revision: 201013
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
  2890
	return EFalse;
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2891
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2892
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2893
void CProviderTCP6::DetachFromInterface()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2894
/**
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2895
Removes this SAP from the user socket count and interface flow count.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2896
This allows link layer and TCP/IP stack go down if no one else uses it.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2897
*/
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2898
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2899
	const TInt off = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2900
	SetOption(KSolInetIp, KSoUserSocket, TPtr8((TUint8*)&off, sizeof(TInt), sizeof(TInt)));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2901
	SetOption(KSolInetIp, KSoKeepInterfaceUp, TPtr8((TUint8*)&off, sizeof(TInt), sizeof(TInt)));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2902
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2903
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2904
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2905
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2906
// Check ioctl completion
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2907
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2908
void CProviderTCP6::CompleteIoctl(TInt aError)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2909
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2910
	if (iFlags.iDataSentIoctl && iSockFlags.iNotify)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2911
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2912
		if (!iSockOutQLen)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2913
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2914
			iFlags.iDataSentIoctl = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2915
			iSocket->IoctlComplete(0);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2916
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2917
		else if (aError != KErrNone)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2918
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2919
			iFlags.iDataSentIoctl = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2920
			Error(KErrCancel, MSocketNotify::EErrorIoctl);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2921
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2922
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2923
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2924
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2925
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2926
//  Main incoming segment processing loop
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2927
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2928
void CProviderTCP6::ProcessSegments()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2929
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2930
	LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments()"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2931
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2932
	ASSERT(iRetransTimer);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2933
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2934
	RMBufRecvPacket packet;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2935
	TBool immediateAck = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2936
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2937
	while (iRecvQ.Remove(packet))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2938
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2939
		RMBufRecvInfo* info = packet.Unpack();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2940
		TIpHeader *ip = ((RMBufPacketPeek &)packet).GetIpHeader();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2941
		TTcpPacket seg(packet, info->iOffset);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2942
		TTcpOptions opt;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2943
		seg.iHdr->Options(opt);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2944
		TInt len = packet.Length() - seg.iHdr->HeaderLength() - info->iOffset;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2945
		TTcpSeqNum seq = seg.iHdr->Sequence();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2946
		TTcpSeqNum ack = seg.iHdr->ACK() ? seg.iHdr->Acknowledgment() : TTcpSeqNum(0);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2947
		TInt fin = seg.iHdr->FIN();  // Save this for FIN processing
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2948
		CProviderTCP6 *nSAP = NULL;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2949
		TTcpSeqNum rcvNxt = iRCV.NXT; // Used in SYN_RECEIVED state
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2950
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2951
		// Get current time
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2952
		TUint32 usec = TimeStamp();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2953
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2954
		if (InState(ETcpListen))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2955
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2956
			TUint32 tsEcr;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2957
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2958
			if (!iParent)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2959
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2960
				//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2961
				// Server socket LISTEN state processing.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2962
				//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2963
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2964
				// Sanity checks.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2965
				if (iConnectCount >= iListenQueueSize || seg.iHdr->RST())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2966
					goto discard;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2967
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2968
				// Check invalid address.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2969
				if (!TInetAddr::Cast(info->iSrcAddr).IsUnicast() ||
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2970
					!TInetAddr::Cast(info->iDstAddr).IsUnicast())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2971
					goto discard;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2972
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2973
				if (IsLandAttack(info))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2974
					goto discard;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2975
				
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2976
				if (seg.iHdr->ACK())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2977
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2978
					LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): ACK received in LISTEN state. Sending RST"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2979
					SendReset(ack, info->iDstAddr, info->iSrcAddr);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2980
					goto discard;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2981
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2982
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2983
				if (!seg.iHdr->SYN())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2984
					goto discard;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2985
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2986
				if (opt.Error())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2987
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2988
					LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): Invalid TCP options"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2989
					SendResetNoSync(seq+len+1, info->iDstAddr, info->iSrcAddr);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2990
					goto discard;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2991
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2992
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2993
				if (opt.MSS() > 0 && opt.MSS() < STATIC_CAST(TInt, KTcpMinimumMSS))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2994
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2995
					LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): Invalid MSS option"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2996
					SendResetNoSync(seq+len+1, info->iDstAddr, info->iSrcAddr);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2997
					goto discard;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2998
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  2999
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3000
				//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3001
				// Sometimes SYN retransmissions get compressed in the network
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3002
				// and get queued in the listen socket. If this happens we just
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3003
				// punt the SYN packet to the correct SAP.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3004
				//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3005
#ifndef SYMBIAN_STRICT_EXPLICIT_SOCKET_BINDING
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3006
				nSAP = (CProviderTCP6*)Protocol()->LocateSap(EMatchConnection, KAFUnspec,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3007
					info->iDstAddr, info->iSrcAddr);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3008
#else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3009
				nSAP = (CProviderTCP6*)Protocol()->LocateSap(EMatchConnection, KAFUnspec,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3010
					info->iDstAddr, info->iSrcAddr, NULL, info->iInterfaceIndex);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3011
#endif //SYMBIAN_STRICT_EXPLICIT_SOCKET_BINDING
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3012
				if (nSAP == NULL)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3013
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3014
					// Create a new SAP and initialize it
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3015
					if (CreateChild(nSAP) != KErrNone)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3016
						goto discard;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3017
					
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3018
#ifdef SYMBIAN_NETWORKING_UPS					
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3019
					nSAP->iConnectionInfoReceived = 1;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3020
#endif
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3021
					RFlowContext flowCtxt = nSAP->iFlow;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3022
					flowCtxt.SetLocalAddr(info->iDstAddr);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3023
					flowCtxt.SetRemoteAddr(info->iSrcAddr);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3024
					nSAP->EnterState(ETcpListen);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3025
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3026
					// Create a flow context
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3027
					TInt status = flowCtxt.Connect();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3028
					if (status < KErrNone)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3029
						{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3030
						LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSYN(): Error %d opening flow context"), (TInt)this, status));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3031
						delete nSAP;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3032
						SendResetNoSync(seq+len+1, info->iDstAddr, info->iSrcAddr);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3033
						goto discard;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3034
						}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3035
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3036
					// Disable on-demand interface setup for the child
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3037
					flowCtxt.FlowContext()->iInfo.iNoInterfaceUp = 1;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3038
					nSAP->iSockFlags.iConnected = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3039
					Protocol()->BindProvider(nSAP);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3040
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3041
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3042
				// Get the new SAP started. It will handle the rest,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3043
				packet.Pack();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3044
				nSAP->Process(packet);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3045
				continue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3046
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3047
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3048
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3049
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3050
			// Child socket LISTEN state processing.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3051
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3052
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3053
	  /*
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3054
	      Set RCV.NXT to SEG.SEQ+1, IRS is set to SEG.SEQ and any other
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3055
	      control or text should be queued for processing later.  ISS
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3056
	      should be selected and a SYN segment sent of the form:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3057
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3058
		<SEQ=ISS><ACK=RCV.NXT><CTL=SYN,ACK>
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3059
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3060
	      SND.NXT is set to ISS+1 and SND.UNA to ISS.  The connection
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3061
	      state should be changed to SYN-RECEIVED.  Note that any other
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3062
	      incoming control or data (combined with SYN) will be processed
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3063
	      in the SYN-RECEIVED state, but processing of SYN and ACK should
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3064
	      not be repeated.  If the listen was not fully specified (i.e.,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3065
	      the foreign socket was not fully specified), then the
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3066
	      unspecified fields should be filled in now.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3067
			*/
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3068
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3069
			// Peer groks timestamps?
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3070
			iFlags.iUseTimeStamps &= opt.TimeStamps(iTsRecent, tsEcr);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3071
			if (!iFlags.iUseTimeStamps)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3072
				iOptions.ClearTimeStamps();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3073
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3074
			// Peer groks SACK?
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3075
			iFlags.iSackOk &= opt.SackOk();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3076
			if (!iFlags.iSackOk)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3077
				iOptions.ClearSackOk();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3078
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3079
			// Peer denies ECN
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3080
			if (!seg.iHdr->ECE() || !seg.iHdr->CWR())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3081
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3082
				iFlags.iEcn = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3083
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3084
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3085
			// Note: the parent does error checking before instantiating a child socket.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3086
			if (opt.MSS() >= 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3087
				iSMSS = opt.MSS();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3088
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3089
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3090
			// The following is based on network interface MTU.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3091
			// We limit the advertised MSS to window size divided by four,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3092
			// in case the interface supportes a large (or infinite) MTU.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3093
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3094
			iRMSS = Min(LinkRMSS(), iSockInBufSize / 2);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3095
			iOptions.SetMSS(iRMSS);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3096
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3097
			// Initialise send sequence number
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3098
			iTransmitSeq = iSND.NXT = Protocol()->RandomSequence();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3099
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3100
			if (!opt.WindowScale() || Protocol()->WinScale() == -1)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3101
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3102
				iRcvWscale = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3103
				iOptions.SetWindowScale(0);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3104
				iSockInBufSize = Min(iSockInBufSize, 0xffff);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3105
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3106
			else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3107
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3108
				iSndWscale = opt.WindowScale() - 1;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3109
				iRcvWscale = (Protocol()->WinScale() > 0 ?
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3110
					Protocol()->WinScale() - 1 : NeedWindowScale());
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3111
				iOptions.SetWindowScale((TUint8)(iRcvWscale + 1));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3112
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3113
				
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3114
			// Initialize receiver sequence and window
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3115
			iFreeWindow = iSockInBufSize % iRMSS;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3116
			iRCV.WND = iSockInBufSize - iFreeWindow;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3117
			iRCV.NXT = seg.iHdr->Sequence() + 1;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3118
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3119
			TUint8 flags = KTcpCtlSYN|KTcpCtlACK;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3120
			if (iFlags.iEcn)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3121
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3122
				flags |= KTcpCtlECE;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3123
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3124
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3125
			// Do not kick idle timers until we are in established state
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3126
			StoreKeepInterfaceUp();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3127
			iFlow.FlowContext()->SetOption(KSolInetIp, KSoKeepInterfaceUp, KInetOptionDisable);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3128
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3129
			// Send SYN-ACK
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3130
			iSND.UNA = iSND.NXT;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3131
			SendSegment(flags);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3132
			++iTransmitSeq;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3133
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3134
			// Make sure we don't miss our window update.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3135
			iSND.WL1 = iRCV.NXT;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3136
			iSND.WL2 = iSND.NXT;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3137
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3138
			iPartialSeq = iSND.UNA;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3139
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3140
			EnterState(ETcpSynReceived);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3141
			goto accept;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3142
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3143
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3144
		if (InState(ETcpSynSent))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3145
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3146
			if (seg.iHdr->ACK() && ack.Outside(iSND.UNA, iSND.NXT))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3147
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3148
				LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): Invalid ack=%u"), (TInt)this, ack.Uint32()));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3149
				if (!seg.iHdr->RST())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3150
					SendReset(ack);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3151
				goto discard;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3152
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3153
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3154
			if (seg.iHdr->RST())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3155
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3156
				if (seg.iHdr->ACK())  // No need to check ack sequence because it was tested above
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3157
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3158
					LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): RST packet"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3159
					Error(KErrCouldNotConnect, MSocketNotify::EErrorConnect);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3160
					EnterState(ETcpClosed);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3161
					goto wrapup;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3162
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3163
				else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3164
					goto discard;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3165
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3166
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3167
			if (!seg.iHdr->SYN())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3168
				goto discard;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3169
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3170
			// Process options for SYN packet.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3171
			if (opt.Error())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3172
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3173
				// In case we receive invalid optons, we should just report an error and reset the connection.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3174
				LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): Invalid options, reset connection"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3175
				if (seg.iHdr->ACK())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3176
					SendReset(ack);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3177
				else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3178
					SendResetNoSync(seq+len+1);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3179
				Error(KErrCouldNotConnect, MSocketNotify::EErrorConnect);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3180
				EnterState(ETcpClosed);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3181
				goto wrapup;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3182
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3183
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3184
			if (opt.MSS() > 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3185
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3186
				if (opt.MSS() < STATIC_CAST(TInt, KTcpMinimumMSS))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3187
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3188
					LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): Invalid MSS option"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3189
					if (seg.iHdr->ACK())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3190
						SendReset(ack);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3191
					else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3192
						SendResetNoSync(seq+len+1);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3193
					goto discard;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3194
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3195
				iSMSS = opt.MSS();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3196
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3197
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3198
			iFlags.iUseTimeStamps &= opt.TimeStamps();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3199
			iFlags.iSackOk &= opt.SackOk();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3200
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3201
			if (opt.WindowScale())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3202
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3203
				iSndWscale = opt.WindowScale() - 1;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3204
				iFreeWindow = iSockInBufSize % iRMSS;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3205
				iRCV.WND = iSockInBufSize - iFreeWindow;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3206
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3207
			else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3208
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3209
				// iFreeWindow and iRCV.WND were confirmed to be less than 0xffff with SYN
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3210
				iRcvWscale = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3211
				iSockInBufSize = Min(iSockInBufSize, 0xffff);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3212
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3213
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3214
			iRCV.NXT = seq+1;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3215
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3216
			// Our SYN was acked?
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3217
			if (seg.iHdr->ACK() && ack == iSND.NXT)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3218
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3219
				iSND.UNA = ack;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3220
				iPartialSeq = ack;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3221
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3222
				TUint32 tsEcr;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3223
				// Check that the timestamp echo has sane values
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3224
				if (iFlags.iUseTimeStamps && opt.TimeStamps(iTsRecent, tsEcr)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3225
						&& tsEcr && usec > tsEcr && usec - tsEcr <= Protocol()->MaxRTO())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3226
					UpdateRTO(usec - tsEcr);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3227
				else if (iFlags.iTiming)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3228
					UpdateRTO(usec - iTimeStamp);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3229
				iFlags.iTiming = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3230
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3231
				//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3232
				// Initial window update as per RFC1122.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3233
				//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3234
				//LOG(Log::Printf(_L("CProviderTCP6::ProcessSegments(): Window update.\r\n")));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3235
				iSND.WND = seg.iHdr->Window(); // no scaling in SYN
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3236
				iSND.WL1 = seq;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3237
				iSND.WL2 = ack;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3238
				iLastWnd = seg.iHdr->Window(); // no scaling in SYN
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3239
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3240
				ResetCwnd(iSMSS);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3241
				iSsthresh = KMaxTInt;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3242
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3243
				ClearSYNSettings();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3244
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3245
				// Peer denies ECN with SYN-ACK.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3246
				if (!seg.iHdr->ECE())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3247
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3248
					iFlags.iEcn = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3249
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3250
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3251
				ReadDestinationCache();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3252
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3253
				// Open up the window for sender
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3254
				SendSegment(KTcpCtlACK);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3255
				EnterState(ETcpEstablished);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3256
				//__ASSERT_DEBUG(iSockFlags.iNotify, User::Panic(_L("notifier"),0));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3257
				// Assert removed. There's a rare case when the stack is unloading. -MikaL
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3258
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3259
				// if ECN negotiation was succesful, tell IP layer (iface.cpp) that ECT bit can be enabled.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3260
				if (iFlags.iEcn)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3261
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3262
					SetEcn(Protocol()->Ecn());
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3263
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3264
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3265
				if (iSockFlags.iNotify)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3266
					iSocket->ConnectComplete();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3267
					
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3268
				// SYN uses one slot in sequence number space. Account for it before processing data.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3269
				++seq;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3270
					
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3271
				goto process_data;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3272
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3273
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3274
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3275
			// Simultaneous open, send SYN+ACK
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3276
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3277
			--iSND.NXT;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3278
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3279
			// Peer denies ECN in SYN
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3280
			if (!seg.iHdr->ECE() || !seg.iHdr->CWR())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3281
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3282
				iFlags.iEcn = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3283
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3284
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3285
			TUint8 flags = KTcpCtlSYN|KTcpCtlACK;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3286
			if (iFlags.iEcn)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3287
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3288
				flags |= KTcpCtlECE;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3289
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3290
			SendSegment(flags);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3291
			EnterState(ETcpSynReceived);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3292
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3293
			// According to RFC793 we should queue any additional data
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3294
			// and controls (e.g. URG) for processing once the established
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3295
			// state has been reached.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3296
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3297
			// No current TCP implementations actually do this (aside from
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3298
			// T/TCP), because of its vulnerability to DoS attacks. In any
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3299
			// case, we're compatible with a peer that wants to send data with
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3300
			// the SYN packet, since the peer will retransmit the data after
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3301
			// we only ack the SYN.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3302
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3303
			goto accept;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3304
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3305
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3306
		if (!InState(ETcpSynReceived|ETcpEstablished|ETcpFinWait1|ETcpFinWait2|
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3307
			ETcpCloseWait|ETcpClosing|ETcpLastAck|ETcpTimeWait))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3308
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3309
			if (InState(ETcpClosed))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3310
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3311
				// We have extra segments after entering CLOSED state. Send RST.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3312
				if (seg.iHdr->ACK())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3313
					SendReset(ack, info->iDstAddr, info->iSrcAddr);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3314
				else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3315
					SendResetNoSync(seq+len, info->iDstAddr, info->iSrcAddr);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3316
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3317
 			goto wrapup;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3318
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3319
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3320
/*
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3321
      Four cases From RFC793 to test in order to determine whether
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3322
      an arriving segment is acceptable:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3323
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3324
      Segment Receive  Test
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3325
      Length  Window
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3326
      ------- -------  -------------------------------------------
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3327
	 0       0     SEG.SEQ = RCV.NXT
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3328
	 0      >0     RCV.NXT =< SEG.SEQ < RCV.NXT+RCV.WND
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3329
	>0       0     not acceptable
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3330
	>0      >0     RCV.NXT =< SEG.SEQ < RCV.NXT+RCV.WND
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3331
		    or RCV.NXT =< SEG.SEQ+SEG.LEN-1 < RCV.NXT+RCV.WND
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3332
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3333
      We transform these into two basic tests, both of which must evaluate
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3334
      true in order to DISCARD a segment. The first test clears the majority
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3335
      of segments that are correctly within receive window. The second test
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3336
      clears special cases where receive window is zero or the incoming segment
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3337
      is only partially within receive window.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3338
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3339
      Note that we accept a segment that is straddling iRCV.NXT even if
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3340
      the receive window is zero. In this case the segment is discarded
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3341
      later during data segment processing.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3342
		*/
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3343
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3344
		// Eliminate earlier DSACK blocks. One duplicate segment can be reported only once.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3345
		if (iFlags.iSackOk && Protocol()->DSack())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3346
			iOptions.SackBlocks().Prune(iRCV.NXT);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3347
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3348
		if (InState(ETcpSynReceived))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3349
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3350
			// In case of simultanous connections TCP retransmits SYN with initial sequence
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3351
			// number when it gets incoming SYN in SYN_SENT state
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3352
			// (it acks received SYN+1 in that case).
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3353
			// Since RCV.NXT is increased after receiving the first SYN, the SYN retransmission
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3354
			// would appear as out-of-order segment, in which case it would be ignored and the TCP
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3355
			// session would never get to ESTABLISHED state.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3356
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3357
			// This adjustment is meant to avoid the above problem while causing minimal compromise
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3358
			// to TCP sequence number check safety.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3359
			rcvNxt = iRCV.NXT - 1;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3360
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3361
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3362
		//      if ((seq < iRCV.NXT || seq >= iRCV.NXT + iRCV.WND) &&                          // 1st test
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3363
		//	  ((iRCV.WND > 0) ? (seq + len <= iRCV.NXT) : (len > 0 || seq > iRCV.NXT)))  // 2nd test
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3364
		// PeLu: The above test passed case where seq > nxt+wnd
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3365
		if ((seq < rcvNxt || seq >= iRCV.NXT + iRCV.WND) &&                          // 1st test
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3366
			((iRCV.WND > 0) ? ((len > 0) ? (seq+len <= iRCV.NXT) || (seq+len > iRCV.NXT + iRCV.WND) : 1)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3367
			: ((len > 0) ? 1 : (seq.Outside(rcvNxt, iRCV.NXT)))))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3368
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3369
			LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): Segment out of window"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3370
			if (!seg.iHdr->RST())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3371
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3372
				// if receiving data partially below RCV.NXT,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3373
				// generate DSACK only for the duplicate portion
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3374
				if (iFlags.iSackOk && Protocol()->DSack() && seq < iRCV.NXT && len > 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3375
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3376
					if (seq + len <= iRCV.NXT)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3377
						{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3378
						iOptions.SackBlocks().AddUnordered(seq, seq + len);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3379
						}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3380
					else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3381
						{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3382
						iOptions.SackBlocks().AddUnordered(seq, iRCV.NXT);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3383
						}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3384
					iOptions.SackBlocks().Limit(4);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3385
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3386
				SendSegment(KTcpCtlACK);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3387
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3388
			if (InState(ETcpTimeWait|ETcpFinWait2))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3389
				SchedMsl2Wait();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3390
			// Accept RST segments that fit within the last advertised window.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3391
			if (seg.iHdr->RST() && !seq.Outside(iLastAck, iLastAck + iRCV.WND))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3392
				LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): Lagged RST"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3393
			else if (iRCV.WND > 0 || iRCV.NXT.Outside(seq, seq+len))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3394
				goto discard;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3395
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3396
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3397
		if (seg.iHdr->RST())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3398
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3399
			// Ignore RST in TIME-WAIT state to prevent TIME-WAIT assassination
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3400
			if (InState(ETcpTimeWait))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3401
				goto discard;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3402
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3403
			// Stop processing and enter CLOSED state
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3404
			LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): RST packet"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3405
			Error(KErrDisconnected);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3406
			EnterState(ETcpClosed);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3407
			goto wrapup;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3408
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3409
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3410
		if (seg.iHdr->SYN() && seq >= iRCV.NXT)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3411
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3412
	  		/*  If the SYN is in the window it is an error, send a reset, any
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3413
	  		outstanding RECEIVEs and SEND should receive "reset" responses,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3414
 		 	all segment queues should be flushed, the user should also
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3415
			receive an unsolicited general "connection reset" signal, enter
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3416
			the CLOSED state, delete the TCB, and return.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3417
				
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3418
			Note: the extra test against RCV.NXT is there to let through a SYN-ACK
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3419
			with the sequence number RCV.NXT-1. This may happen in a simultaneous
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3420
			connect case, where the SYN-ACK packet is retransmitted. The SYN-ACK
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3421
			will be hanled below as part of SYN-RECEIVED state processing.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3422
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3423
			Otherwise, if the SYN is not in the window this step would not be
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3424
			reached and an ack would have been sent in the first step (sequence
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3425
			number check).
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3426
			*/
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3427
			SendReset(iSND.NXT);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3428
			Error(KErrDisconnected);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3429
			EnterState(ETcpClosed);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3430
			goto wrapup;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3431
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3432
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3433
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3434
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3435
		//  ACK PROCESSING
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3436
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3437
		if (!seg.iHdr->ACK())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3438
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3439
			LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): No ACK"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3440
			goto discard;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3441
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3442
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3443
		// Check options
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3444
		if (opt.Error())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3445
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3446
			LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): Invalid options"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3447
			SendReset(ack);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3448
			goto discard;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3449
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3450
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3451
		if (InState(ETcpSynReceived))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3452
			if(ack.Inside(iSND.UNA, iSND.NXT))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3453
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3454
			EnterState(ETcpEstablished);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3455
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3456
			const TInt ifup = iFlags.iKeepInterfaceUp;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3457
			SetOption(KSolInetIp, KSoKeepInterfaceUp, TPtr8((TUint8*)&ifup, sizeof(TInt), sizeof(TInt)));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3458
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3459
			// if ECN negotiation was succesful, tell IP layer that ECT bit can be enabled.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3460
			if (iFlags.iEcn)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3461
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3462
				SetEcn(Protocol()->Ecn());
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3463
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3464
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3465
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3466
			// Initial window update as per RFC1122.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3467
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3468
			//LOG(Log::Printf(_L("CProviderTCP6::ProcessSegments(): Window update.\r\n")));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3469
			iSND.WND = seg.iHdr->Window() << iSndWscale;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3470
			iSND.WL1 = seq;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3471
			iSND.WL2 = ack;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3472
			iLastWnd = seg.iHdr->Window() << iSndWscale;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3473
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3474
			ResetCwnd(iSMSS);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3475
			iCwnd -= iSMSS;   // Compensate for cwnd increase below during ack processing
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3476
			iSsthresh = KMaxTInt;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3477
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3478
			ClearSYNSettings();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3479
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3480
			ReadDestinationCache();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3481
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3482
			// The following causes the socket server to (eventually) call Start()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3483
			if (iParent)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3484
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3485
				iSockFlags.iAttached = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3486
				ASSERT(iParent->iSockFlags.iNotify);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3487
				if (iParent->CompleteChildConnect(this) == KErrAbort)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3488
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3489
					LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): SAP Deleted, abort ProcessSegments()"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3490
					// Object in use was deleted. Just free the packet and return.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3491
					packet.Free();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3492
					return;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3493
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3494
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3495
			else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3496
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3497
				//__ASSERT_DEBUG(iSockFlags.iNotify, User::Panic(_L("notifier"), 0));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3498
				// Assert removed. There's a rare case when the stack is unloading. -MikaL
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3499
				if (iSockFlags.iNotify)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3500
					iSocket->ConnectComplete();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3501
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3502
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3503
		else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3504
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3505
			LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): Bad SYN-ACK"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3506
			SendReset(ack);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3507
			goto discard;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3508
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3509
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3510
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3511
		// Check ack sequence for all remaining states
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3512
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3513
		if(ack > iSND.NXT)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3514
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3515
			LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): ACK above window"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3516
			SendSegment(KTcpCtlACK);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3517
			goto discard;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3518
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3519
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3520
		// A good packet arrived and the connection is idle, reset the keep-alives state
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3521
		if (CanFireKeepAlives())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3522
			ResetKeepAlives();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3523
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3524
		// Check for ECN congestion established bit.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3525
		if (info->iVersion == 4)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3526
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3527
			if (iFlags.iEcn && ip->ip4.EcnIsCongestion())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3528
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3529
				iFlags.iEcnHaveCongestion = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3530
				LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): Have ECN CE bit in IPv4 packet"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3531
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3532
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3533
		else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3534
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3535
			if (iFlags.iEcn && ip->ip6.EcnIsCongestion())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3536
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3537
				iFlags.iEcnHaveCongestion = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3538
				LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): Have ECN CE bit in IPv6 packet"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3539
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3540
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3541
		
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3542
		if (InState(ETcpEstablished|ETcpFinWait1|ETcpFinWait2|ETcpCloseWait|ETcpClosing|ETcpLastAck))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3543
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3544
			TInt acked = ack - iSND.UNA;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3545
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3546
			if (acked >= 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3547
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3548
				// ECN CWR means that receiver has noticed our Congestion Echo. No more congestion.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3549
				if (seg.iHdr->CWR())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3550
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3551
					iFlags.iEcnHaveCongestion = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3552
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3553
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3554
				if (iFlags.iUseTimeStamps)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3555
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3556
					TUint32 tsVal, tsEcr;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3557
					// Check that tsEcr has sane values
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3558
					if (opt.TimeStamps(tsVal, tsEcr) && tsEcr && usec - tsEcr <= KTcpMaxRTO)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3559
						{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3560
						if (acked > 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3561
							{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3562
							UpdateRTO(usec - tsEcr);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3563
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3564
							// Got one RTT with timestamps. Don't take another.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3565
							if (iFlags.iTiming && ack >= iTimingSeq)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3566
								iFlags.iTiming = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3567
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3568
							//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3569
							// Delay spike detection. If the echoed timestamp predates
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3570
							// our last retransmission timeout we abort the retransmission
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3571
							// sequence. However, we do not inflate the congestion window
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3572
							// for two reasons: 1) a long delay might also be a sign of
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3573
							// congestion, and 2) this feature could potentially be used
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3574
							// by a hostile peer to artificially inflate our congestion
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3575
							// window.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3576
							//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3577
							// PS: Delay spike detection with timestamps is not in use with F-RTO
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3578
							if (!Protocol()->FRTO() && tsEcr < iLastTimeout &&
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3579
								!opt.SackBlocks().Count())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3580
								{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3581
								iTransmitSeq = iSND.NXT;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3582
								SpuriousTimeout(acked);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3583
								}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3584
							}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3585
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3586
						//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3587
						// The condition in RFC1323 is buggy(?):
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3588
						//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3589
						//    SEG.SEQ <= Last.ACK.sent < SEG.SEQ + SEG.LEN
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3590
						//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3591
						// The best current practise is the following, because it updates
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3592
						// TSrecent also on pure ACKs:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3593
						//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3594
						//    SEG.TSval >= TSrecent and SEG.SEQ <= Last.ACK.sent
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3595
						//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3596
						if (tsVal > iTsRecent && seq <= iLastAck)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3597
							iTsRecent = tsVal;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3598
						}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3599
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3600
				if (iFlags.iTiming && ack >= iTimingSeq)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3601
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3602
					UpdateRTO(usec - iTimeStamp);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3603
					iFlags.iTiming = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3604
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3605
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3606
				// SACK book keeping
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3607
				if (iFlags.iSackOk)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3608
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3609
					// Remove acknowledged blocks
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3610
					if (opt.SackBlocks().Count())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3611
						{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3612
						SequenceBlockQueueIter iter(opt.SackBlocks());
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3613
						SequenceBlock *block;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3614
						while (block = iter++, block != NULL)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3615
							{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3616
							//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3617
							// Record SACK block but do some sanity checking first.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3618
							//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3619
							if (ack < block->iLeft && block->iLeft < block->iRight
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3620
								&& block->iRight <= iSND.NXT)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3621
								{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3622
								iSacked.AddOrdered(block);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3623
								}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3624
							}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3625
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3626
						// Take RTT estimate using SACK info
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3627
						if (iFlags.iTiming && iSacked.Count() && iSacked.Last()->iRight >= iTimingSeq)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3628
							{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3629
							UpdateRTO(usec - iTimeStamp);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3630
							iFlags.iTiming = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3631
							}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3632
						}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3633
					iSacked.Prune(ack);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3634
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3635
					// Update iRetranData
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3636
					if (iSacked.Count() && ack < iSendHigh)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3637
						{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3638
						iRetranData = iSendHigh - ack;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3639
						SequenceBlockQueueIter iter(opt.SackBlocks());
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3640
						SequenceBlock *block;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3641
						while (block = iter++, block != NULL && block->iLeft < iSendHigh)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3642
							{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3643
							if (block->iRight < iSendHigh)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3644
								iRetranData -= (block->iRight - block->iLeft);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3645
							else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3646
								iRetranData -= (iSendHigh - block->iLeft);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3647
							}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3648
						}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3649
					else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3650
						iRetranData = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3651
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3652
					LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): acked=%d iRetranData = %d"),
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3653
						(TInt)this, acked, iRetranData));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3654
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3655
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3656
				// Did they acknowledge any new data?
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3657
				if (acked > 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3658
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3659
					// Reset retransmit backoff
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3660
					if (iBackoff && iSND.WND > 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3661
						{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3662
						LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): Some data ACKed, clearing Backoff"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3663
						iBackoff = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3664
						}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3665
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3666
					// Trim send queue
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3667
					iSND.UNA = ack;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3668
					if ((TInt)iSockOutQLen > acked) // Avoid barfing on acked SYN or FIN packet
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3669
						{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3670
						iSockOutQ.TrimStart(acked);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3671
						iSockOutQLen -= acked;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3672
						}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3673
					else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3674
						{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3675
						iSockOutQ.Free();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3676
						iSockOutQLen = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3677
						CompleteIoctl(KErrNone);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3678
						}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3679
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3680
					// Tag along
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3681
					if (iSND.UP < ack)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3682
						iSND.UP = ack - 1;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3683
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3684
					// Tag along
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3685
					if (iPartialSeq < ack)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3686
						iPartialSeq = ack;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3687
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3688
					// Tag along
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3689
					if (iSendHigh < ack)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3690
						iSendHigh = ack - 1;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3691
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3692
					if (iFlags.iFastRetransMode)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3693
						{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3694
						if (iFlags.iSackOk ? !iSacked.Count() : ack >= iRecoverSeq)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3695
							{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3696
							LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): Leaving FAST RETRANS mode"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3697
							iFlags.iFastRetransMode = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3698
							iDupAcks = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3699
							// Deflate congestion window
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3700
							iCwnd = Min(iSsthresh, iSND.NXT - iSND.UNA + iSMSS);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3701
							}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3702
						else if (!iFlags.iSackOk)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3703
							{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3704
							// NewReno partial ACK processing.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3705
58
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  3706
						  /* From RFC2582:
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  3707
						   If this ACK does *not* acknowledge all of the data up to and
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  3708
						   including "recover", then this is a partial ACK.  In this case,
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  3709
						   retransmit the first unacknowledged segment.  Deflate the
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  3710
						   congestion window by the amount of new data acknowledged, then
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  3711
						   add back one MSS and send a new segment if permitted by the new
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  3712
						   value of cwnd.  This "partial window deflation" attempts to
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  3713
						   ensure that, when Fast Recovery eventually ends, approximately
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  3714
						   ssthresh amount of data will be outstanding in the network.  Do
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  3715
						   not exit the Fast Recovery procedure (i.e., if any duplicate ACKs
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  3716
						   subsequently arrive, execute Steps 3 and 4 above).
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  3717
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  3718
						   For the first partial ACK that arrives during Fast Recovery, also
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  3719
						   reset the retransmit timer.
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3720
							*/
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3721
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3722
							iCwnd -= acked;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3723
							iCwnd += iSMSS;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3724
							LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): FAST RETRANSMIT on PARTIAL ACK"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3725
							SendDataSegment(ack);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3726
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3727
							//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3728
							// Socket write makes use of the duplicate ack count to
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3729
							// temporarily extend the send buffer during fast recovery.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3730
							// We deflate the buffer here.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3731
							//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3732
							ASSERT(iSMSS);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3733
							iDupAcks = Max(iDupAcks - acked / (TInt)iSMSS, 0);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3734
							}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3735
						}
58
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  3736
					else if ( iDupAcks )
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  3737
                        {
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  3738
                        // New data acknowledged, and not ongoing any recovery action
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  3739
                        // Reset duplicate ack count
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  3740
                        LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): Reset iDupAcks to 0"), (TInt)this));
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  3741
                        iDupAcks = 0;
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  3742
                        }
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3743
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3744
					// Reset limited transmit window
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3745
					iLwnd = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3746
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3747
					// Everything acked?
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3748
					if (ack == iSND.NXT)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3749
						{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3750
						iTransmitSeq = iSND.NXT;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3751
						}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3752
					else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3753
						{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3754
						// Restart retransmission timeout
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3755
						ReSchedRetransmit();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3756
						}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3757
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3758
					//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3759
					// Adjust congestion window.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3760
					//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3761
					TUint incr = iSMSS;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3762
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3763
					if (iCwnd < iSsthresh)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3764
						iCwnd += incr;			    // Slow-start
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3765
					else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3766
						iCwnd += Max(incr * incr / iCwnd, 1); // Congestion avoidance
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3767
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3768
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3769
				else if (ack < iSND.NXT)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3770
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3771
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3772
					//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3773
					// Fast retransmit algorithm.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3774
					//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3775
					// Note! We only reset the duplicate ack count if the received
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3776
					// segment acknowledges some new data or if a timeout has
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3777
					// occurred. However, we simply ignore window updates and piggy-back
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3778
					// acknowledgements unless they also acknowledge new data. Other
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3779
					// duplicate acknowledgements increase the duplicate ack count and
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3780
					// may trigger a fast retransmission.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3781
					//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3782
					if (len == 0 && (seg.iHdr->Window() << iSndWscale) == iLastWnd)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3783
						{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3784
						if (iFlags.iSackOk)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3785
							{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3786
							TTcpSeqNum fack = iSacked.Count() ? iSacked.Last()->iRight : iSND.UNA;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3787
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3788
							// Acks caused by out-of-window segments don't count
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3789
							if (opt.SackBlocks().Count() && opt.SackBlocks().First()->iRight > iSND.UNA)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3790
								iDupAcks++;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3791
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3792
							 //Removed the conditional checking ack > iSendHigh as it is only being used for if SACK option is not set.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3793
							 // Set the retransmission mode as the fast retransmit if the three TCP duplicate ACKs are received from the server and
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3794
                             //send the lost segment(s) to the server.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3795
							if (
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3796
								(iDupAcks >= Protocol()->Reordering() ||
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3797
								fack > iSND.UNA + Protocol()->Reordering() * iRMSS))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3798
								{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3799
								LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): SACK RETRANSMIT!"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3800
								iFlags.iFastRetransMode = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3801
								iSsthresh = Max((iSND.NXT - iSND.UNA) / 2, 2 * iSMSS);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3802
								iCwnd = iSsthresh;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3803
								iSendHigh = ack;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3804
								ReSchedRetransmit();    // Restart retransmission timeout
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3805
								iTransmitSeq = iSendHigh; // Rewind transmitter for SACK retransmit
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3806
								SendSegments(ETrue);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3807
	                            iDupAcks = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3808
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3809
								}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3810
							}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3811
						else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3812
							{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3813
							if (ack > iSendHigh)        // Never retransmitted?
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3814
								iDupAcks++;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3815
							if (iFlags.iFastRetransMode)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3816
								{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3817
								iCwnd += iSMSS;         // Inflate congestion window
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3818
								}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3819
							else if (iDupAcks == Protocol()->Reordering())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3820
								{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3821
								LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): FAST RETRANSMIT!"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3822
								iFlags.iFastRetransMode = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3823
								iSsthresh = Max((iSND.NXT - iSND.UNA) / 2, 2 * iSMSS);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3824
								iCwnd = iSsthresh + 3 * iSMSS;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3825
								iRecoverSeq = iSND.NXT;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3826
								iLwnd = 0;                    // Reset limited transmit window
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3827
								ReSchedRetransmit();	    // Restart retransmission timeout
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3828
								SendDataSegment(ack);         // Retransmit a single segment
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3829
								}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3830
							}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3831
						if (!iFlags.iFastRetransMode)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3832
							{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3833
							//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3834
							// Increment limited transmit window
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3835
							//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3836
							if (iSND.UNA + iCwnd >= iSND.NXT)  // FIXME. Prevent lwnd increase during RTO
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3837
								iLwnd = Min(iLwnd + iSMSS, iSMSS * Protocol()->LtxWindow());
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3838
							ReSchedRetransmit();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3839
							}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3840
						}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3841
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3842
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3843
				else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3844
					iDupAcks = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3845
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3846
				// F-RTO stuff. If we enter here, RTO has just occurred, and e.g. iDupAcks should be 0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3847
				if (iFRTOsent)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3848
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3849
					LOG(Log::Printf(_L("\ttcp SAP[%u] F-RTO: iFRTOsent=%d   acked=%d   ack-sndhigh=%d"),
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3850
						(TInt)this, iFRTOsent, acked, (ack - iSendHigh)));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3851
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3852
					// The ack following the RTO did not advance window, or we cannot transmit new
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3853
					// unsent data => conventional recovery
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3854
					//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3855
					// The last term of the condition below is due to special case:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3856
					// If the first ack after RTO covers all outstanding data, the RTO was due
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3857
					// to lost retransmit and fixed the whole outstanding window).
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3858
					if (!acked || !CanForwardTransmit() || (ack >= iRealSendHigh && iFRTOsent == 1))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3859
						{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3860
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3861
						LOG(Log::Printf(_L("\ttcp SAP[%u] F-RTO: Doing go-back-N"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3862
						iTransmitSeq = iSND.UNA;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3863
						if (iFRTOsent == 1 && !acked)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3864
							{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3865
							// dupack arrives before RTO retransmission is acknowledged.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3866
							// don't retransmit the same segment again.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3867
							iTransmitSeq += EffectiveMSS();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3868
							}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3869
						iCwnd = EffectiveMSS() * iFRTOsent; // number of RTTs after RTO
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3870
						iFRTOsent = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3871
						}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3872
					else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3873
						{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3874
						// Force 2 segments out on first ack after RTO. For that purpose we have to
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3875
						// estimate the current flightsize (-> iCwnd) and set iLwnd to 2.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3876
						// Note that after this step iCwnd is set either to 2*MSS or iSsthresh, so
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3877
						// the setup below is very temporary.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3878
						if (iFRTOsent == 1)  // first new ACK after RTO
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3879
							{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3880
							iCwnd = iSND.NXT - iSND.UNA - iSacked.ByteCount() + 2 * iSMSS;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3881
							}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3882
						else if (iFRTOsent == 2)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3883
							{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3884
							// Spurious RTO.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3885
							// second new ACK after RTO, continue in earlier state because the second
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3886
							// ACK was delayed and the RTO was likely spurious.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3887
							SpuriousTimeout(acked);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3888
							}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3889
						// coverity[write_write_order]
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3890
						iFRTOsent = (++iFRTOsent) % 3;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3891
						}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3892
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3893
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3894
				iLastWnd = seg.iHdr->Window() << iSndWscale;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3895
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3896
				if (iSND.WL1 < seq || (iSND.WL1 == seq && iSND.WL2 <= ack))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3897
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3898
					iSND.WND = seg.iHdr->Window() << iSndWscale;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3899
					iSND.WL1 = seq;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3900
					iSND.WL2 = ack;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3901
					//LOG(Log::Printf(_L("CProviderTCP6::ProcessSegments(): Window update: %d.\r\n"), iSND.WND));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3902
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3903
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3904
				// if we are not yet in recovery, reduce congestion window on ECN CE Echo.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3905
				if (iFlags.iEcn && seg.iHdr->ECE())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3906
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3907
					LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): Got ECN echo"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3908
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3909
					// SourceQuench returns False, if congestion window was reduced for some other
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3910
					// reason in the last RTT. However, if it was reduced due to FR
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3911
					// (i.e. last QuenchSeq was more than one RTT ago), we better send CWR to suppress
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3912
					// ECE flags at the other end.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3913
					if (SourceQuench() || iQuenchSeq.Outside(iSND.NXT, iSND.NXT + iSND.WND))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3914
						{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3915
						iFlags.iEcnSendCWR = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3916
						}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3917
					}
58
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  3918
				// This section used to hold the RetryACK concept, a reference can be checked
8d540f55e491 Revert incorrect RCL_3 drop:
Pat Downey <patd@symbian.org>
parents: 57
diff changeset
  3919
				// from older versions(9.2/9.3). Its being removed as not required.	
0
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3920
					
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3921
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3922
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3923
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3924
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3925
		// Everything acked? Check if we need to do a state transition.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3926
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3927
		if (ack == iSND.NXT)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3928
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3929
			if (InState(ETcpFinWait1))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3930
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3931
				EnterState(ETcpFinWait2);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3932
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3933
				//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3934
				// If the peer does not send a FIN for some reason,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3935
				// we might hang in FIN-WAIT-2 indefinitely. We use
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3936
				// a 2*MSL timeout to break out of FIN-WAIT-2.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3937
				//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3938
				// Note that we can only do this if the application
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3939
				// has closed both directions of the connection.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3940
				// However, this should take care of cleanup in the
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3941
				// the most common case where a server socket hangs
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3942
				// in FIN-WAIT-2, because the client has crashed or
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3943
				// disappeared before sending a FIN-ACK.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3944
				//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3945
				if (iSockFlags.iRecvClose)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3946
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3947
					LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): Setting FIN-WAIT-2 timeout"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3948
					SchedMsl2Wait();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3949
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3950
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3951
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3952
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3953
			// If we have a lingering Close() or Shutdown(ENormal), complete it with KErrNone.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3954
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3955
			if (iLinger > 0 && InState(ETcpFinWait2|ETcpClosing|ETcpLastAck))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3956
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3957
				/*
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3958
				In addition to the processing for the ESTABLISHED state, if
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3959
				the retransmission queue is empty, the user's CLOSE can be
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3960
				acknowledged ("ok") but do not delete the TCB.*/
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3961
				iLinger = -1;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3962
				iLingerTimer->Cancel();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3963
				Detach();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3964
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3965
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3966
			if (InState(ETcpClosing))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3967
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3968
				EnterState(ETcpTimeWait);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3969
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3970
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3971
			if (InState(ETcpLastAck))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3972
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3973
				if (!Protocol()->LocalTimeWait())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3974
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3975
					//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3976
					// Local resource optimization. If the peer is on localhost,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3977
					// we will terminate it here. Normally, it would wait for
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3978
					// a duration of 2*MSL in TIME-WAIT state before deleting
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3979
					// itself.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3980
					//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3981
					CFlowContext *flow = iFlow.FlowContext();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3982
#ifndef SYMBIAN_STRICT_EXPLICIT_SOCKET_BINDING
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3983
					CProviderTCP6 *sap =
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3984
						(CProviderTCP6*)Protocol()->LocateSap(EMatchConnection,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3985
						KAFUnspec,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3986
						flow->RemoteAddr(),
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3987
						flow->LocalAddr());
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3988
#else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3989
					CProviderTCP6 *sap =
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3990
						(CProviderTCP6*)Protocol()->LocateSap(EMatchConnection,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3991
						KAFUnspec,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3992
						flow->RemoteAddr(),
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3993
						flow->LocalAddr(),
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3994
						NULL, info->iInterfaceIndex);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3995
#endif //SYMBIAN_STRICT_EXPLICIT_SOCKET_BINDING
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3996
					if (sap != NULL && sap->InState(ETcpTimeWait))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3997
						{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3998
						LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): Deleting local peer"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  3999
						sap->Expire();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4000
						}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4001
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4002
				/*
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4003
				The only thing that can arrive in this state is an
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4004
				acknowledgment of our FIN.  If our FIN is now acknowledged,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4005
				delete the TCB, enter the CLOSED state, and return.*/
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4006
				EnterState(ETcpClosed);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4007
				goto wrapup;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4008
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4009
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4010
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4011
		if (InState(ETcpTimeWait))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4012
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4013
	  /*
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4014
          The only thing that can arrive in this state is a
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4015
          retransmission of the remote FIN.  Acknowledge it, and restart
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4016
			the 2 MSL timeout.*/
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4017
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4018
			// RFC793 appears to be wrong here. A retransmitted FIN should
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4019
			// already have been acknowledged as an out-of-sequence packet.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4020
			// Also, a simultaneous close can cause both end points to send
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4021
			// an ack and enter the TIME-WAIT state at the same time. In this
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4022
			// rare case, the following line will cause an ack storm, where
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4023
			// each side is acknowledging ack packets from the other side.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4024
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4025
			//SendSegment(KTcpCtlACK);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4026
			SchedMsl2Wait();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4027
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4028
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4029
	process_data:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4030
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4031
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4032
		//  DATA SEGMENT PROCESSING
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4033
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4034
		if (InState(ETcpEstablished|ETcpFinWait1|ETcpFinWait2))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4035
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4036
			if (seg.iHdr->URG())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4037
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4038
				TTcpSeqNum up = seq + seg.iHdr->Urgent();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4039
				/*
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4040
				If the URG bit is set, RCV.UP <- max(RCV.UP,SEG.UP), and signal
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4041
				the user that the remote side has urgent data if the urgent
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4042
				pointer (RCV.UP) is in advance of the data consumed.  If the
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4043
				user has already been signaled (or is still in the "urgent
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4044
				mode") for this continuous sequence of urgent data, do not
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4045
				signal the user again.*/
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4046
				if (up > seq)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4047
					RememberUrgentPointer(up);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4048
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4049
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4050
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4051
			//  Process data segments.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4052
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4053
			if (len > 0)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4054
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4055
				if (iSockFlags.iRecvClose)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4056
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4057
					// Receive direction has been shut down. Send RST.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4058
					SendReset(ack);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4059
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4060
				else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4061
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4062
					//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4063
					// Zero window? We will already have sent and ACK in response,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4064
					// so we can just discard the segment.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4065
					//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4066
					if (!iRCV.WND)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4067
						goto accept;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4068
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4069
					TInt maxLen = iRCV.NXT + iRCV.WND - seq;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4070
					if (len > maxLen)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4071
						{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4072
						//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4073
						// Part of segment is above window -> truncate. This
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4074
						// can happen when peer is probing a zero window.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4075
						//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4076
						LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): Above window payload: %u"), (TInt)this, len - maxLen));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4077
						if (maxLen <= 0)  // Sanity check
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4078
							goto accept;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4079
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4080
						len = maxLen;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4081
						packet.TrimEnd(seg.iHdr->HeaderLength() + info->iOffset + len);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4082
						fin = 0;    // Cannot process FIN yet.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4083
						}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4084
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4085
					// Remember to ack a pushed segment immediately
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4086
					if (seg.iHdr->PSH() && Protocol()->PushAck())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4087
						immediateAck = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4088
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4089
					if (seq <= iRCV.NXT)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4090
						{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4091
						//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4092
						// WARNING! This will destroy the segment header!
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4093
						//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4094
						LOG(if(seq<iRCV.NXT)Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): Below window payload: %d"), (TInt)this, iRCV.NXT - seq));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4095
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4096
						// Remove segment header and below-window payload.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4097
						packet.TrimStart(iRCV.NXT - seq + seg.iHdr->HeaderLength() + info->iOffset);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4098
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4099
						// Put in receive queue.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4100
						iSockInQ.Append(packet);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4101
						len -= (iRCV.NXT - seq);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4102
						iSockInQLen += len;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4103
						iNewData += len;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4104
						iRCV.NXT += len;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4105
						iRCV.WND -= len;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4106
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4107
						//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4108
						// Check if we can take something out of the reassembly queue.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4109
						//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4110
						TTcpSeqNum fragOff;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4111
						TBool fastAck = !iFragQ.IsEmpty();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4112
						while (!iFragQ.IsEmpty())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4113
							{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4114
							fragOff = iFragQ.First().Offset();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4115
							if (fragOff > iRCV.NXT)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4116
								break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4117
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4118
							RMBufTcpFrag frag;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4119
							iFragQ.Remove(frag);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4120
							TUint32 fragLen = frag.FragmentLength();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4121
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4122
							// Already got this?
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4123
							if (fragOff + fragLen <= iRCV.NXT)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4124
								{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4125
								frag.Free();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4126
								continue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4127
								}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4128
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4129
							// Ok. Trim it and put it in receive queue.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4130
							TTcpPacket seg(frag);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4131
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4132
							frag.TrimStart(seg.iHdr->HeaderLength() + (iRCV.NXT - fragOff));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4133
							fragLen -= (iRCV.NXT - fragOff);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4134
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4135
							ASSERT(fragLen == (TUint)frag.Length());
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4136
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4137
							iSockInQ.Append(frag);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4138
							iSockInQLen += fragLen;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4139
							iNewData += fragLen;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4140
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4141
							ASSERT((TUint)iSockInQLen >= iNewData);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4142
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4143
							LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): Took %d:%d(%d) from reassembly queue"),
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4144
								(TInt)this, iRCV.NXT.Uint32(), (iRCV.NXT + fragLen).Uint32(), fragLen));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4145
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4146
							iRCV.NXT += fragLen;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4147
							iRCV.WND -= fragLen;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4148
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4149
							}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4150
						//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4151
						// Update SACK book keeping
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4152
						//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4153
						if (iFlags.iSackOk)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4154
							iOptions.SackBlocks().Prune(iRCV.NXT);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4155
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4156
						/*
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4157
                      	To provide feedback to senders recovering from losses, the receiver
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4158
                      	SHOULD send an immediate ACK when it receives a data segment that
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4159
						fills in all or part of a gap in the sequence space. */
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4160
						if (fastAck)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4161
							SendSegment(KTcpCtlACK);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4162
						}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4163
					else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4164
						{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4165
						LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): Processing out-of-order segment!"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4166
						TTcpSeqNum blockSeq;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4167
						TUint32 blockLen;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4168
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4169
						// Fragment queue assumes packet starts from TCP header
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4170
						packet.TrimStart(info->iOffset);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4171
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4172
						//packet.FreeInfo(); --  Leave the info. We need it below.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4173
						RMBufTcpFrag frag;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4174
						frag.Assign(packet);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4175
						iFragQ.Add(frag, (TUint32*)&blockSeq, &blockLen);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4176
						if (iFlags.iSackOk)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4177
							{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4178
							iOptions.SackBlocks().AddUnordered(blockSeq, blockSeq + blockLen);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4179
							iOptions.SackBlocks().Limit(4);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4180
							}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4181
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4182
                      /*
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4183
                      Out-of-order data segments SHOULD be acknowledged immediately, in
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4184
                      order to accelerate loss recovery.  To trigger the fast retransmit
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4185
                      algorithm, the receiver SHOULD send an immediate duplicate ACK when
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4186
						it receives a data segment above a gap in the sequence space. */
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4187
						SendSegment(KTcpCtlACK);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4188
						}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4189
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4190
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4191
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4192
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4193
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4194
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4195
		//  FIN PROCESSING
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4196
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4197
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4198
/*
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4199
      If the FIN bit is set, signal the user "connection closing" and
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4200
      return any pending RECEIVEs with same message, advance RCV.NXT
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4201
      over the FIN, and send an acknowledgment for the FIN.  Note that
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4202
      FIN implies PUSH for any segment text not yet delivered to the
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4203
      user.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4204
		*/
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4205
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4206
		// Remember that we have received a FIN. Note: the FIN may have
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4207
		// been received as part of an out-of-sequence segment, in which
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4208
		// case we may not be ready to process it yet.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4209
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4210
		if (fin && !iFlags.iFinReceived)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4211
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4212
			iFlags.iFinReceived = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4213
			iFinSeq = seq + len;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4214
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4215
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4216
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4217
		// Process FIN when all data has been received.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4218
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4219
		if (iFlags.iFinReceived && iRCV.NXT == iFinSeq)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4220
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4221
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4222
			// Advance iRCV.NXT past the FIN. This also ensures
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4223
			// that we never end up here again.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4224
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4225
			iRCV.NXT++;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4226
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4227
			if (InState(ETcpFinWait1|ETcpFinWait2))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4228
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4229
				//LOG(Log::Printf(_L("IMMEDIATE FIN ACK\r\n")));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4230
				SendSegment(KTcpCtlACK);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4231
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4232
			else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4233
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4234
				//LOG(Log::Printf(_L("DELAYED FIN ACK\r\n")));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4235
				SendDelayACK();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4236
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4237
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4238
/*
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4239
        SYN-RECEIVED STATE
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4240
        ESTABLISHED STATE
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4241
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4242
          Enter the CLOSE-WAIT state.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4243
			*/
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4244
			if (InState(ETcpSynReceived|ETcpEstablished))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4245
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4246
				EnterState(ETcpCloseWait);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4247
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4248
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4249
/*
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4250
        FIN-WAIT-1 STATE
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4251
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4252
          If our FIN has been ACKed (perhaps in this segment), then
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4253
          enter TIME-WAIT, start the time-wait timer, turn off the other
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4254
          timers; otherwise enter the CLOSING state.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4255
			*/
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4256
			if (InState(ETcpFinWait1))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4257
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4258
	      /*
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4259
	      If our FIN has been ACKed (perhaps in this segment), then
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4260
	      enter TIME-WAIT, start the time-wait timer, turn off the other
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4261
				timers; otherwise enter the CLOSING state.*/
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4262
				if (iSND.UNA == iSND.NXT)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4263
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4264
					EnterState(ETcpTimeWait);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4265
					SchedMsl2Wait();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4266
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4267
				else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4268
					EnterState(ETcpClosing);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4269
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4270
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4271
/*
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4272
        FIN-WAIT-2 STATE
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4273
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4274
          Enter the TIME-WAIT state.  Start the time-wait timer, turn
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4275
          off the other timers.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4276
			*/
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4277
			if (InState(ETcpFinWait2))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4278
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4279
	      /*
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4280
	      Enter the TIME-WAIT state.  Start the time-wait timer, turn
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4281
				off the other timers.*/
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4282
				Stop();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4283
				EnterState(ETcpTimeWait);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4284
				SchedMsl2Wait();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4285
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4286
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4287
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4288
			// Anything that could arrive in TIME-WAIT is an out-of-window
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4289
			// segment and should never end up here.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4290
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4291
#ifdef notdef
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4292
/*
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4293
        TIME-WAIT STATE
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4294
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4295
          Remain in the TIME-WAIT state.  Restart the 2 MSL time-wait
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4296
          timeout.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4297
			*/
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4298
			if (InState(ETcpTimeWait))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4299
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4300
	      /*
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4301
	      Remain in the TIME-WAIT state.  Restart the 2 MSL time-wait
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4302
				timeout.*/
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4303
				SchedMsl2Wait();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4304
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4305
#endif
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4306
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4307
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4308
	wrapup:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4309
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4310
		// Time to die.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4311
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4312
		if (InState(ETcpClosed) && iRecvQ.IsEmpty())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4313
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4314
			packet.Free();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4315
			Close();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4316
			Expire();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4317
			return;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4318
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4319
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4320
	accept:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4321
			// Reset idle timers
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4322
		Protocol()->Interfacer()->PacketAccepted(info->iOriginalIndex);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4323
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4324
	discard:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4325
			packet.Free();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4326
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4327
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4328
	// Complete application level read.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4329
	if (iFlags.iCompleteRecv)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4330
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4331
		LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): Complete application read"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4332
		iFlags.iCompleteRecv = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4333
		iCopyOutOffset = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4334
      if (iSockFlags.iNotify)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4335
		iSocket->Error(KErrNone, MSocketNotify::EErrorRecv);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4336
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4337
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4338
	// This may cause an immediate ACK to be sent from within GetData()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4339
	if (iNewData)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4340
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4341
		TInt newData = iNewData, up = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4342
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4343
		// Adjust for urgent data.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4344
		if (iUpCount)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4345
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4346
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4347
			// Find the offset of an urgent byte following a block of
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4348
			// non-urgent data. The number of junked (already delivered)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4349
			// urgent bytes will be left in <up>. This looks complicated
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4350
			// but should normally be very quick.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4351
			//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4352
			newData = iSockInQLen;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4353
			for (up = 0; up < iUpCount; up++)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4354
				{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4355
				TInt offset = UrgentOffset(up);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4356
				if (offset > up)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4357
					{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4358
					newData = Min(offset, iSockInQLen);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4359
					break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4360
					}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4361
				}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4362
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4363
			// We have an undelivered urgent byte within the block.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4364
			if (iFlags.iUrgentMode && !iFlags.iOobInline && newData > UrgentOffset())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4365
				newData = UrgentOffset();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4366
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4367
			ASSERT(newData <= (TInt)iSockInQLen);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4368
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4369
			// Subtract bytes that have already been advertised to ESock
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4370
			newData -= (iSockInQLen - iNewData);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4371
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4372
			// Subtract out-of-band bytes
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4373
			if (!iFlags.iOobInline)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4374
				newData -= up;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4375
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4376
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4377
		// Do we have something?
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4378
		if (newData > 0 && iFlags.iStarted && iSockFlags.iNotify)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4379
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4380
			ASSERT(newData + (iFlags.iOobInline ? 0 : up) <= (TInt)iNewData);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4381
			iNewData -= newData;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4382
			if (!iFlags.iOobInline)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4383
				iNewData -= up;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4384
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4385
			LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): NewData(%d), %d urgent bytes %s, %d bytes not reported"),
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4386
				(TInt)this, newData, up, iFlags.iOobInline ? _S("inline") : _S("junked"), iNewData));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4387
			iPending += newData;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4388
			iSocket->NewData(newData);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4389
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4390
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4391
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4392
	// Notify urgent data to application
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4393
	if (iFlags.iNotifyUrgent && iSockFlags.iNotify)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4394
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4395
		LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): Urgent data notification"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4396
		iFlags.iNotifyUrgent = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4397
		iSocket->Error(KErrUrgentData, 0);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4398
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4399
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4400
	// Notify application that connection has been closed by peer.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4401
	if (InState(ETcpCloseWait|ETcpClosing|ETcpTimeWait) && !iFlags.iCloseNotified && !iNewData)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4402
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4403
		iFlags.iCloseNotified = ETrue;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4404
		if (iFlags.iStarted && iSockFlags.iNotify && !iSockFlags.iRecvClose)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4405
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4406
			LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): Calling NewData(KNewDataEndOfData)"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4407
			if(iSocket)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4408
			iSocket->NewData(KNewDataEndofData);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4409
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4410
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4411
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4412
	if (iLastAck < iRCV.NXT)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4413
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4414
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4415
		// We are required to send an ACK for at least every two full sized
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4416
		// segments but at most once every full sized segment.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4417
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4418
		// In steady state the following rule will acknowledge every second
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4419
		// segment regardless of the options in the segments (unless maximum
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4420
		// segment size is VERY small). However, if we receive segments smaller
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4421
		// than MSS/2, we will send an ACK roughly once for every full segment
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4422
		// of received data. This works out pretty good. However, if the
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4423
		// received segments are significantly smaller, we will start to
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4424
		// experience stretch ACK problems. This might happen, for instance,
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4425
		// if peer is using PMTUD and the path is constrained. Currently, we
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4426
		// ignore the problem.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4427
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4428
		// We ack all pushed segments immediately. This improves performance
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4429
		// for interactive traffic, since partial segments typically have the
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4430
		// PSH bit set.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4431
		//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4432
		if (iLastAck + iRMSS < iRCV.NXT || immediateAck)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4433
			SendSegment(KTcpCtlACK);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4434
		else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4435
			SendDelayACK();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4436
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4437
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4438
	// Wake up transmitter.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4439
	SchedTransmit();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4440
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4441
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4442
	// Wake up application
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4443
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4444
	// Note: We do this even if send window is zero, because
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4445
	// new data from application will trigger zero window probing.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4446
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4447
	// Note 2: Do not wake up app, if lingering close is pending.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4448
	//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4449
	if (iSockFlags.iFlowStopped)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4450
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4451
		LOG(Log::Printf(_L("\ttcp SAP[%u] ProcessSegments(): FLOW STARTED"), (TInt)this));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4452
		iSockFlags.iFlowStopped = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4453
		if (iSocket && iSockFlags.iNotify && (iLinger == -1 || !iSockFlags.iSendClose))
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4454
			iSocket->CanSend();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4455
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4456
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4457
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4458
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4459
void CProviderTCP6::SpuriousTimeout(TUint aAcked)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4460
/**
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4461
Spurious timeout occurred.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4462
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4463
Sets the congestion control parameters depending on the ini setting "tcp_spurious_rto_recovery".
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4464
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4465
@param aAcked	Number of bytes acknowledged with the ACK that triggered this method.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4466
*/
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4467
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4468
	// TODO: if ACK has ECN-Echo flag, congestion control should not be reverted
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4469
	LOG(Log::Printf(_L("\ttcp SAP[%u] SpuriousTimeout(%u) ENTER: cwnd: %u  ssthresh: %u"), 
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4470
			(TInt)this, aAcked, iCwnd, iSsthresh));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4471
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4472
	switch(Protocol()->SpuriousRtoResponse())
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4473
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4474
	case 1:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4475
	default:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4476
		// Eifel response (draft uses initial window as burst limit, we use MaxBurst)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4477
		// Assume that ssthresh was set to FlightSize / 2 when RTO occurred.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4478
		iSsthresh = iSsthresh << 1;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4479
		iCwnd = iSND.NXT - iSND.UNA + Min(aAcked, Protocol()->MaxBurst());
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4480
		break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4481
		
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4482
	case 2:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4483
		// Half sending rate (ssthresh has been adjusted when RTO occurred)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4484
		iCwnd = iSsthresh;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4485
		break;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4486
		
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4487
	case 3:
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4488
		// DCLOR - like behaviour (from earlier draft versions)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4489
		iSsthresh = iSsthresh << 1;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4490
		iCwnd = 1;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4491
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4492
	LOG(Log::Printf(_L("\ttcp SAP[%u] SpuriousTimeout() EXIT: cwnd: %u  ssthresh: %u"), 
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4493
			(TInt)this, iCwnd, iSsthresh));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4494
	// TODO: Do we want to do the RTO adjustment required in Eifel Response draft? Maybe not. -PS
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4495
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4496
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4497
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4498
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4499
// Initiate a connection by sending the first SYN.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4500
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4501
// Note: The flow MUST be ready when calling this method.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4502
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4503
void CProviderTCP6::SendSYN()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4504
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4505
	ASSERT(iState == ETcpConnect);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4506
	ASSERT(iFlow.FlowContext() != 0);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4507
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4508
	// Initialise send sequence number
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4509
	iTransmitSeq = iSND.NXT = Protocol()->RandomSequence();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4510
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4511
	if (Protocol()->WinScale() != -1)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4512
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4513
		iRcvWscale = (Protocol()->WinScale() > 0 ? Protocol()->WinScale() - 1 : NeedWindowScale());
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4514
		iOptions.SetWindowScale((TUint8)(iRcvWscale + 1));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4515
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4516
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4517
	iRMSS = Min(LinkRMSS(), iSockInBufSize / 2);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4518
	iOptions.SetMSS(iRMSS);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4519
	iFreeWindow = Min(iSockInBufSize, 0xffff) % iRMSS;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4520
	iRCV.WND = Min(iSockInBufSize, 0xffff) - iFreeWindow;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4521
	iSND.UNA = iSND.NXT;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4522
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4523
	TUint8 flags = KTcpCtlSYN;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4524
	// Start ECN negotiation by setting both ECN bits on in a SYN packet [RFC 3168].
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4525
	if (iFlags.iEcn)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4526
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4527
		flags |= KTcpCtlECE | KTcpCtlCWR;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4528
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4529
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4530
	SendSegment(flags);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4531
	iTransmitSeq++;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4532
	EnterState(ETcpSynSent);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4533
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4534
	// Disable on-demand interface setup for this flow
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4535
	iFlow.FlowContext()->iInfo.iNoInterfaceUp = 1;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4536
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4537
	// Lock source address for this flow. It needs to persist over link change events.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4538
	iFlow.FlowContext()->iInfo.iLocalSet = 1;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4539
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4540
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4541
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4542
TInt CProviderTCP6::CreateChild(CProviderTCP6*& aSAP)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4543
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4544
	ASSERT(iConnectCount < iListenQueueSize);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4545
	ASSERT(iListenQueue);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4546
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4547
	// Create a new SAP and initialize it
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4548
	TRAPD(err, aSAP = (CProviderTCP6*)Protocol()->NewSAPL(KSockStream));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4549
	if (err == KErrNone) //lint -save -esym(613, aSAP) Possible NULL trapped here
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4550
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4551
		aSAP->iParent = this;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4552
		aSAP->iSockFamily = iSockFamily;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4553
		aSAP->iAppFamily = iAppFamily;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4554
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4555
		// The new SAP is not yet known to socket server
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4556
		aSAP->iSockFlags.iAttached  = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4557
		aSAP->iSockFlags.iNotify    = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4558
		aSAP->iHasNetworkServices = HasNetworkServices();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4559
		// Copy TCP options to the new socket.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4560
		aSAP->iSockInBufSize        = iSockInBufSize;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4561
		aSAP->iSockOutBufSize       = iSockOutBufSize;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4562
		aSAP->iMSS                  = iMSS;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4563
		aSAP->iSockFlags.iReuse     = iSockFlags.iReuse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4564
		aSAP->iFlags.iOobInline     = iFlags.iOobInline;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4565
		aSAP->iFlags.iNoDelay       = iFlags.iNoDelay;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4566
		aSAP->iFlags.iEcn		  = iFlags.iEcn;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4567
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4568
		// Clone the flow. Lower layer socket options get copied to the new flow.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4569
		aSAP->iFlow.Clone(iFlow);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4570
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4571
		// Clone currently resets the notifier, so we reinstall it here
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4572
		aSAP->iFlow.SetNotify(aSAP);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4573
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4574
		// If the listen queue is full, kill a random connection.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4575
		if (iConnectCount == iListenQueueSize)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4576
			{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4577
			TInt i = Protocol()->Random(iListenQueueSize);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4578
			CProviderTCP6 *sap = iListenQueue[i];
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4579
			sap->iParent = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4580
			iListenQueue[i] = iListenQueue[--iConnectCount];
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4581
			iListenQueue[iConnectCount] = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4582
			sap->Expire();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4583
			}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4584
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4585
		// Add the new connection into listen queue.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4586
		iListenQueue[iConnectCount++] = aSAP;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4587
		} //lint -restore
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4588
	return err;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4589
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4590
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4591
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4592
void CProviderTCP6::DetachChild(CProviderTCP6* aSAP)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4593
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4594
	ASSERT(iConnectCount > 0);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4595
	ASSERT(iListenQueue);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4596
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4597
	// Remove child from listen queue
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4598
	for (TUint i = 0; i < iConnectCount; i++)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4599
		if (iListenQueue[i] == aSAP)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4600
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4601
		aSAP->iParent = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4602
		iListenQueue[i] = iListenQueue[--iConnectCount];
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4603
		iListenQueue[iConnectCount] = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4604
		return;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4605
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4606
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4607
#ifdef _DEBUG
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4608
	User::Panic(_L("CProviderTCP6::DetachChild()"), 0);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4609
#endif
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4610
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4611
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4612
TInt CProviderTCP6::CompleteChildConnect(CProviderTCP6* aSAP)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4613
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4614
	ASSERT(aSAP);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4615
	ASSERT(iSocket);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4616
	iChildDeleted = EFalse;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4617
	iSocket->ConnectComplete(*aSAP);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4618
	// In some cases SocketServer might have destroyed SAP.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4619
	// If this happens, return error for deleted SAP.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4620
	return iChildDeleted ? KErrAbort : KErrNone;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4621
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4622
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4623
inline void CProviderTCP6::SetChildDeleted(TBool aDeleted)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4624
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4625
	iChildDeleted = aDeleted;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4626
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4627
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4628
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4629
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4630
// Clear all set option bits for SYNs
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4631
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4632
void CProviderTCP6::ClearSYNSettings()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4633
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4634
	// Remove SYN options from active TCP options.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4635
	iOptions.SetWindowScale(0);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4636
	iOptions.ClearMSS();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4637
	iOptions.ClearSackOk();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4638
	if (!iFlags.iUseTimeStamps)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4639
		iOptions.ClearTimeStamps();	
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4640
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4641
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4642
TUint8 CProviderTCP6::NeedWindowScale()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4643
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4644
	TUint bufbits = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4645
#ifdef SYMBIAN_ADAPTIVE_TCP_RECEIVE_WINDOW
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4646
	//Window scaling factor needs to be negotiated if the iMaxRecvWin
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4647
	//is more than the 64K, irrespective of the socket receive buffer
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4648
	//size. This will help in achieving the maximum throughput in case
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4649
	//modulation changes
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4650
	if(iTcpMaxRecvWin > iSockInBufSize )
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4651
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4652
		bufbits = iTcpMaxRecvWin >> 16;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4653
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4654
	else
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4655
#endif //SYMBIAN_ADAPTIVE_TCP_RECEIVE_WINDOW
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4656
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4657
		bufbits = iSockInBufSize >> 16;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4658
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4659
	TUint8 scale = 0;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4660
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4661
	while (bufbits)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4662
		{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4663
		scale++;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4664
		bufbits >>= 1;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4665
		}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4666
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4667
	return scale;
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4668
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4669
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4670
TInt CProviderTCP6::CheckPolicy(const TSecurityPolicy& aPolicy, const char *aDiagnostic)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4671
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4672
	return iParent ? iParent->CheckPolicy(aPolicy, aDiagnostic) : CProviderInet6Transport::CheckPolicy(aPolicy, aDiagnostic);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4673
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4674
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4675
// TCP reassembly queue implementation
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4676
//
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4677
TUint RMBufTcpFrag::Offset()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4678
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4679
	//LOG(Log::Printf(_L("RMBufTcpFrag::FragOffset()\r\n")));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4680
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4681
	TTcpPacket seg(*this);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4682
	return seg.iHdr->Sequence().Uint32();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4683
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4684
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4685
TUint RMBufTcpFrag::FragmentLength()
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4686
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4687
	//LOG(Log::Printf(_L("RMBufTcpFrag::FragLength(): length = %d\r\n"), Length()));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4688
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4689
	TTcpPacket seg(*this);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4690
	return Length() - seg.iHdr->HeaderLength();
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4691
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4692
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4693
void RMBufTcpFrag::Join(RMBufChain& aSeg)
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4694
	{
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4695
	//LOG(Log::Printf(_L("RMBufTcpFrag::Join()\r\n")));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4696
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4697
	TTcpPacket thisSeg(*this), newSeg(aSeg);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4698
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4699
	// Remove header and overlapping data from aSeg.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4700
	aSeg.TrimStart(newSeg.iHdr->HeaderLength() +
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4701
		(Length() - thisSeg.iHdr->HeaderLength()) -
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4702
		(newSeg.iHdr->Sequence() - thisSeg.iHdr->Sequence()));
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4703
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4704
	// Append.
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4705
	Append(aSeg);
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4706
	}
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4707
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4708
#ifdef __ARMCC__
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4709
#pragma pop
af10295192d8 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
  4710
#endif