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// Copyright (c) 2002-2010 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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// Implements the active object that controls the Read() requests.
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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 "Receiver.h"
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#include "Constants.h"
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#include <es_ini.h>
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const TUint KBufferIncreaseStep=500;
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const TUint K64k=65535;
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CReceiver::CReceiver(CBcaIoController& aObserver, CBttLogger* aTheLogger, TUint aMaxPacketSize)
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/**
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* Constructor. Performs standard active object initialisation.
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*
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* @param aObserver Reference to the observer of this state machine
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* @param aTheLogger The logging object
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*/
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: CActive(EPriorityHigh),
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iObserver(aObserver),
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iTheLogger(aTheLogger),
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iMaxPacketSize(aMaxPacketSize)
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{
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CActiveScheduler::Add(this);
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}
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CReceiver* CReceiver::NewL(CBcaIoController& aObserver, CBttLogger* aTheLogger, TUint aMaxPacketSize)
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/**
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* Two-phase constructor. Creates a new CBcaIoController object, performs
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* second-phase construction, then returns it.
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*
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* @param aObserver The observer, to which events will be reported
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* @param aTheLogger The logging object
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* @return A newly constructed CBcaIoController object
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*/
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{
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CReceiver* self = new (ELeave) CReceiver(aObserver, aTheLogger, aMaxPacketSize);
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CleanupStack::PushL(self);
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self->ConstructL();
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CleanupStack::Pop(self);
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return self;
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}
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void CReceiver::ConstructL()
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/**
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* Second-phase constructor. Creates all the state objects it owns.
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*/
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{
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_LOG_L1C1(_L8("CReceiver::ConstructL"));
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iData.CreateL(iMaxPacketSize);
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}
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CReceiver::~CReceiver()
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/**
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* Destructor.
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*/
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{
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iData.Close();
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Cancel();
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}
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void CReceiver::RunL()
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/**
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* Method called when read request completes. This will only be once the BCA has a full IP
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* packet in its buffer.
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*/
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{
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_LOG_L1C2(_L8("CReceiver::RunL [iStatus=%d]"), iStatus.Int());
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if (iStatus != KErrNone)
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{
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if (iStatus == KErrNoMemory)
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{
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_LOG_L2C1(
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_L8("WARNING! CReceiver: Read failed with KErrNoMemory. Increase buffer."));
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// Read operation failed!! Nif will re-issue the read request. Increase buffer.
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if ((iMaxPacketSize + KBufferIncreaseStep) > K64k)
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{
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// In theory IP packet can't be bigger than 64k, so if we come here something is wrong so stop observer.
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iObserver.Stop(KErrNoMemory);
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}
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else
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{
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iMaxPacketSize += KBufferIncreaseStep;
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TInt err = iData.ReAlloc(iMaxPacketSize);
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if (KErrNoMemory == err)
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{
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iObserver.Stop(KErrNoMemory);
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}
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else
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{
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(iObserver.Bca())->Read(iStatus, iData);
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SetActive();
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}
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}
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}
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else
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{
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_LOG_L2C1(_L8("WARNING! CReceiver: Read failed"));
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iObserver.Stop(iStatus.Int());
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}
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return;
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}
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else
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{
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_LOG_L1C1(_L8("CReceiver: Data Packet Received"));
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iRMBufPacket.CreateL(iData);
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// Immediately execute new read request.
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(iObserver.Bca())->Read(iStatus, iData);
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SetActive();
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iRMBufPacket.Pack();
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#ifdef RAWIP_HEADER_APPENDED_TO_PACKETS
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TUint16 protocolCode = iObserver.RemoveHeader(iRMBufPacket);
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#else
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TUint16 protocolCode = 0;
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#endif // RAWIP_HEADER_APPENDED_TO_PACKETS
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// Process the packet
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iObserver.GetObserver().Process(iRMBufPacket, protocolCode);
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iRMBufPacket.Free();
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}
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}
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void CReceiver::DoCancel()
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/**
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* Cancel active request
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*/
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{
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_LOG_L1C1(_L8("CReceiver::DoCancel"));
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(iObserver.Bca())->CancelRead();
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}
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void CReceiver::StartListening()
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/**
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* This method issues a Read request. This is the API used to receive
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* packets from BCA.
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*/
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{
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_LOG_L1C1(_L8("CReceiver::StartListening"));
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// The BCA will complete this read once it has a full IP packet in its buffer.
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(iObserver.Bca())->Read(iStatus, iData);
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SetActive();
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}
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