author | William Roberts <williamr@symbian.org> |
Wed, 10 Nov 2010 13:36:07 +0000 | |
branch | RCL_3 |
changeset 79 | 4b172931a477 |
parent 5 | 1422c6cd3f0c |
permissions | -rw-r--r-- |
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// Copyright (c) 1997-2009 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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// Implementation CLanIp4Bearer class, a derived from CLanxBearer. |
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// History |
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// 15/11/01 Started by Julian Skidmore. |
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// 11/03 Refactored as part of DHCP relocation work |
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// |
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// |
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/** |
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@file |
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*/ |
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#include <in_sock.h> // Header is retained, but in_sock.h is modified for ipv6 |
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#include <in_pkt.h> |
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#include <in6_if.h> |
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#include <nifvar.h> |
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#include <comms-infras/connectionsettings.h> |
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#include "CLanIp4Bearer.h" |
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#include "arp_hdr.h" |
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#include <commdb.h> |
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#include <cdblen.h> |
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#include "EthProto.h" |
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#include "eth_log.h" |
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#include "ProtocolHeaders.h" |
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#include <comms-infras/es_protbinder.h> |
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#include "EthProvision.h" |
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#include <nifmbuf.h> |
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using namespace ESock; |
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/** |
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Required ConstructL() method. Performs the following: |
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" Sets a unique name for this binder instance in the iIfName field - "eth6[0x%x]" where "%x" |
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is the hexadecimal address of the "this" object. |
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" Reads the IP Interface Settings using ReadIPInterfaceSettingsL(). |
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" Reads CommDb settings (e.g. IPv6 static DNS configuration) from the LAN Service Table via |
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ReadCommDbLanSettingsL(). |
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*/ |
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void CLanIp4Bearer::ConstructL() |
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{ |
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iIfName.Format(_L("eth[0x%08x]"), this); |
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// ReadCommDbLanSettingsL() moved from here to point when provisioning information received |
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} |
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TInt CLanIp4Bearer::Control(TUint aLevel, TUint aName, TDes8& aOption) |
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{ |
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if ((aLevel==KCOLInterface) || (aLevel==KSOLInterface)) |
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{ |
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switch (aName) |
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{ |
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case KSoIfHardwareAddr: |
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{ |
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if (static_cast<TUint>(aOption.Length())<sizeof(TSoIfHardwareAddr)) |
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{ |
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return KErrArgument; |
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} |
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TSoIfHardwareAddr& opt=*(TSoIfHardwareAddr*)aOption.Ptr(); |
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opt.iHardwareAddr.SetFamily(1); // Set up the address family type |
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opt.iHardwareAddr.SetPort(1); // Hardware Type, has to be returned in the port field... |
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opt.iHardwareAddr.SetLength(8); // The length so far, 4 for family + 4 for port... |
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opt.iHardwareAddr.Append(Link()->MacAddress()); |
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return KErrNone; |
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} |
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default: |
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return KErrNotSupported; |
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} |
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} |
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return KErrNotSupported; // keep compiler happy - all returns covered by switch above |
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} |
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|
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|
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_LIT8(KEtherMACMultiCastPrefix,"\x01\x00\x5e"); |
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|
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/** |
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Call down from the Protocol |
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Real Protocol data is in the second MBuf of the RMBufChain |
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The info block contains important addressing information; |
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If the destination address family is KAfInet, |
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then we must generate the hardware destination address |
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since it could not be resolved by ARP. It is probably |
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a broadcast or multicast address. |
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Otherwise, |
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the destination address contains a resolved hardware |
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address and we only need to shift the address bytes |
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for the lower layer. |
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Caller Flow controls off if the return to this method is <= 0 |
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@param aPdu A reference to the packet to be sent (really an RMBufPkt) |
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@param aSource A pointer to the source protocol. |
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@return The no. of bytes send. |
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*/ |
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MLowerDataSender::TSendResult CLanIp4Bearer::Send(RMBufChain& aPdu) |
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104 |
{ |
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// Check that we are allowed to send data |
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if (!Link()->BearerIsActive(this)) |
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107 |
{ |
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108 |
aPdu.Free(); |
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return ESendBlocked; |
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110 |
} |
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111 |
|
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RMBufPktInfo* info = RMBufPacket::PeekInfoInChain(aPdu); |
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113 |
|
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if (info->iDstAddr.Family() == KAfInet) |
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115 |
{ |
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// Create hardware addresses for multicast and broadcast destinations |
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117 |
|
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if (TInetAddr::Cast(info->iDstAddr).IsMulticast()) |
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119 |
{ |
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TInetAddr multicastDest(TInetAddr::Cast(info->iDstAddr).Address() & KArpMacMulticastMask, 0); |
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info->iDstAddr.Copy(KEtherMACMultiCastPrefix); |
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TUint32 addr = multicastDest.Address(); |
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info->iDstAddr.Append((addr&0xff0000)>>16); |
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info->iDstAddr.Append((addr&0xff00)>>8); |
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info->iDstAddr.Append((addr&0xff)); |
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126 |
} |
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127 |
else |
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// Catch all types of broadcast addresses (including subnet) |
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129 |
{ |
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for(TUint ix = 0; ix < KMACByteLength; ix++) |
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131 |
{ |
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info->iDstAddr[ix] = 0xff; |
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133 |
} |
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134 |
} |
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135 |
} |
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136 |
else |
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// Shift the already resolved hardware address to the beginning |
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138 |
{ |
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for(TUint ix = 0; ix < KMACByteLength; ix++) |
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140 |
{ |
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info->iDstAddr[ix] = info->iDstAddr[ix + KDestAddrOffset]; |
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142 |
} |
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143 |
} |
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144 |
|
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145 |
TInt ret = Link()->FrameSend(aPdu, NULL, (TUint)info->iProtocol == KProtocolArp ? KArpFrameType : KIPFrameType); |
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__FLOG_STATIC(KEther802LogTag1, KEthLogTag2, _L("CLanIp4Bearer::Send() sent packet")); |
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return static_cast<MLowerDataSender::TSendResult>(ret); |
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148 |
} |
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149 |
|
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150 |
/** |
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151 |
StartSending notifies the protocol that this object is ready to transmit and process data. |
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@param aProtocol A pointer to the object which signalled it is ready to StartSending. |
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153 |
*/ |
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154 |
void CLanIp4Bearer::StartSending(CProtocolBase* aProtocol) |
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155 |
{ |
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__FLOG_STATIC(KEther802LogTag1, KEthLogTag2, _L("CLanIp4Bearer::StartSending()")); |
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CLanxBearer::StartSending(aProtocol); |
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158 |
} |
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159 |
|
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160 |
/** |
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161 |
WantsProtocol, takes an ethernet aProtocolCode code and the initial part of the packet's |
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162 |
payload as input and returns ETrue if the bearer wants the packet of this type of protocol |
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and payload, or EFalse otherwise. CLanIp4Bearer wants the protocol if it is an Arp message or |
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an Ip4 protocol (an Ip protocol, whose Version field == 4). WantsProtocol also sets |
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165 |
iArpMsgNext to ETrue if the protocol was Arp or EFalse otherwise. |
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@param aProtocolCode The Ethernet protocol Type. |
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@param aPayload A pointer to the beginning of the packet payload. |
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@return sets iArpMsgNext to ETrue if the protocol was Arp or EFalse otherwise. |
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169 |
*/ |
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170 |
TBool CLanIp4Bearer::WantsProtocol(TUint16 aProtocolCode,const TUint8* aPayload) |
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171 |
{ |
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return ((aProtocolCode==KIPProtocol && (aPayload[0]>>4)==KIP4Protocol) || (aProtocolCode==KArpFrameType)) ? ETrue:EFalse; |
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173 |
} |
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174 |
|
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175 |
/** |
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176 |
Process processes a packet received from the LinkLayer. |
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@param aPdu The Packet to be sent (actually an RMBufPkt). |
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@param aLLC Unclear. |
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179 |
*/ |
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180 |
void CLanIp4Bearer::Process(RMBufChain& aPdu, TAny* aLLC) |
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181 |
{ |
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182 |
__FLOG_STATIC(KEther802LogTag1, KEthLogTag2, _L("CLanIp4Bearer::Process(RMBufChain& aPdu,TAny* aLLC)")); |
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183 |
|
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184 |
if (iUpperReceiver) |
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185 |
{ |
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186 |
// Set the protocol type in the info header if ARP packet |
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RMBufPktInfo* info = RMBufPacket::PeekInfoInChain(aPdu); |
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188 |
if (reinterpret_cast<TUint32>(aLLC) == KArpFrameType) |
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189 |
{ |
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190 |
__FLOG_STATIC(KEther802LogTag1, KEthLogTag2, _L("CLanIp4Bearer::Process() - Received ARP packet")); |
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191 |
info->iProtocol = KProtocolArp; |
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192 |
} |
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193 |
|
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194 |
__FLOG_STATIC(KEther802LogTag1, KEthLogTag2, _L("CLanIp4Bearer::Process() - calling iProtocol->Process(aPdu,..)")); |
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195 |
iUpperReceiver->Process(aPdu); |
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196 |
} |
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197 |
else |
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198 |
{ |
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199 |
aPdu.Free(); |
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200 |
} |
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201 |
} |
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202 |
|
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203 |
/** |
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204 |
ReadCommDbLanSettingsL() reads CommDb settings from the LAN Service Table. In particular, it |
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205 |
reads the fields related to IPv4 Static DNS configuration. The LAN_IP4_DNS_ADDR_FROM_SERVER |
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206 |
field is a boolean that indicates whether IPv4 Static DNS configuration is required or not. |
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If FALSE, then static configuration is required. In this case, the IPv4 primary and secondary |
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DNS server addresses are read from the CommDb fields LAN_IP4_NAME_SERVER1 and LAN_IP4_NAME_SERVER2 |
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and stored in the iPrimaryDns and iSecondaryDns data members. They are later presented to |
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the TCP/IP stack when the Control() method is called with the KSoIfConfig option. |
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*/ |
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void CLanIp4Bearer::ReadCommDbLanSettingsL() |
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{ |
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ASSERT(iProvision); |
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iLocalAddr = iProvision->LocalAddr(); |
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iNetMask = iProvision->NetMask(); |
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iDefGateway = iProvision->DefGateway(); |
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iPrimaryDns = iProvision->PrimaryDns(); |
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iSecondaryDns = iProvision->SecondaryDns(); |
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} |
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TInt CLanIp4Bearer::GetConfig(TBinderConfig& aConfig) |
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{ |
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TBinderConfig4* config = TBinderConfig::Cast<TBinderConfig4>(aConfig); |
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if(config == NULL) |
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{ |
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return KErrNotSupported; |
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} |
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config->iFamily = KAfInet; /* KAfInet / KAfInet6 - selects TBinderConfig4/6 */ |
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|
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config->iInfo.iFeatures = KIfCanBroadcast | KIfCanMulticast | KIfNeedsND; /* Feature flags */ |
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config->iInfo.iMtu = Link()->Mtu(); /* Maximum transmission unit. */ |
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config->iInfo.iRMtu = Link()->Mtu(); /* Maximum transmission unit for receiving. */ |
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config->iInfo.iSpeedMetric = Link()->SpeedMetric(); /* approximation of the interface speed in Kbps. */ |
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|
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config->iAddress.SetAddress(iLocalAddr); /* Interface IP address. */ |
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config->iNetMask.SetAddress(iNetMask); /* IP netmask. */ |
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config->iBrdAddr.SetAddress(iBroadcastAddr); /* IP broadcast address. */ |
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config->iDefGate.SetAddress(iDefGateway); /* IP default gateway or peer address (if known). */ |
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config->iNameSer1.SetAddress(iPrimaryDns); /* IP primary name server (if any). */ |
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config->iNameSer2.SetAddress(iSecondaryDns); /* IP secondary name server (if any). */ |
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|
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return KErrNone; |
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} |
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|
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const TDesC8& CLanIp4Bearer::ProtocolName() const |
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/** |
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Return the protocol name of this bearer |
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Called from CLANLinkCommon |
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*/ |
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{ |
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_LIT8(KProtocolName, "ip"); |
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return KProtocolName(); |
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} |
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void CLanIp4Bearer::SetProvisionL(const Meta::SMetaData* aProvision) |
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{ |
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if (iProvision == NULL) |
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{ |
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iProvision = static_cast<const TLanIp4Provision*>(aProvision); |
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ReadCommDbLanSettingsL(); |
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} |
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} |
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269 |