multimediacommsengine/mmcesrv/mmceserver/src/mcereliablesender.cpp
author hgs
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permissions -rw-r--r--
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/*
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* Copyright (c) 2005 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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*
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*/
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#include <e32base.h>
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#include <e32cmn.h>
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#include <siprackheader.h>
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#include <sipconnection.h>
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#include <sipresponseelements.h>
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#include <siprequestelements.h>
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#include <sipcseqheader.h> 
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#include <siprseqheader.h> 
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#include <centralrepository.h>
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#include <sipsdkcrkeys.h>
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#include <stringpool.h>
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#include "mcesip.h"
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#include "mcesrvlogs.h"
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#include "mcereliableobserver.h"
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#include "mcereliablesender.h"
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#include "mceeventstatebase.h"
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// CONSTANTS
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const TInt KMaxTransTimeOut = 64;
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const TUint KTransInterval = 2;
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// -----------------------------------------------------------------------------
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// CMCEReliableSender::NewL ;
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// Two-phased constructor. ;
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// -----------------------------------------------------------------------------
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//
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CMceReliableSender* CMceReliableSender::NewL( MMceReliableObserver& aObserver )
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    {
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	CMceReliableSender* self = new( ELeave ) CMceReliableSender( aObserver );
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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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// -----------------------------------------------------------------------------
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// CMceReliableSender::CMceReliableSender
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// Constructor
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// -----------------------------------------------------------------------------
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//
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CMceReliableSender::CMceReliableSender( MMceReliableObserver& aObserver )
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: iObserver( &aObserver )
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    {
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    }
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// -----------------------------------------------------------------------------
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// Destructor
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// -----------------------------------------------------------------------------
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//
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CMceReliableSender::~CMceReliableSender()
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    {
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	delete iDTimer;
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	delete iResponseElements;
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    }
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// -----------------------------------------------------------------------------
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// CMceReliableSender::ConstructL
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// Symbian 2nd phase constructor.
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// -----------------------------------------------------------------------------
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//
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void CMceReliableSender::ConstructL()
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    {
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	const TUint	KMaxRSec = 0x7fffffff;
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    const TUint	KMinRSec = 1;
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	TInt timerT1;
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	CRepository* repository = CRepository::NewLC( KCRUidSIP );
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	User::LeaveIfError( repository->Get( KSIPTransactionTimerT1, timerT1 ));
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	CleanupStack::PopAndDestroy( repository );
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    iT1 = timerT1;
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    iRetransTimer = 1;
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    iTotaltime = 0;
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    iSequenceNumber = MceSip::Random( KMinRSec, KMaxRSec );
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	iTransactionMatched = EFalse;
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	iTransactionStatus = EFalse;	// No Pending transaction Yet 
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	iTransTimeoutFlag = EFalse;
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    // Create the timer entry 
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	iDTimer = CDeltaTimer::NewL( CActive::EPriorityStandard );
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	TCallBack cb( TimerExpire, this );
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	iDeltaEntry.Set( cb );
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    }
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// -----------------------------------------------------------------------------
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// CMceReliableSender::Rseq
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// -----------------------------------------------------------------------------
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//
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TUint CMceReliableSender::Rseq( CSIPServerTransaction& aTransaction )
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    {
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    TInt tInProcess = 0;
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	if  ( iTransactionStatus )
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	    {
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	    MCESRV_DEBUG( "CMceReliableSender::Rseq: Transsaction in Process");
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	    return tInProcess;
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	    }
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   	else if( &aTransaction == iServerTransaction )
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	    {
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		iSequenceNumber = iSequenceNumber + 1;
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		return iSequenceNumber;
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	    }
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	else
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	    {
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	    return iSequenceNumber;
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	    }
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    }
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// -----------------------------------------------------------------------------
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// CMceReliableSender::SendResponseL
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// -----------------------------------------------------------------------------
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//
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void CMceReliableSender::SendResponseL( CSIPServerTransaction& aTransaction, 
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                                        CSIPResponseElements* aElements )
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    {
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	if  ( iTransactionStatus )
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	    {
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        User::Leave( KErrInUse );
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	    }
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    iServerTransaction = &aTransaction;
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	CSIPResponseElements* xResponses;
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	// Set the Transaction in progree Flag  
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	iTransactionStatus = ETrue;
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    TUint queueTimer = 0;
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	xResponses = ResponseCloneL( *aElements );
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	CleanupStack::PushL( xResponses );
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    iServerTransaction->SendResponseL( xResponses );
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    MCESRV_DEBUG_DVALUE( 
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        "CMceReliableSender::SendResponseL - timer value:", iRetransTimer );
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    CleanupStack::Pop( xResponses );
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   	iResponseElements = aElements;  
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   	queueTimer = iRetransTimer * iT1 *KConversionMilliToMicro;
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	iDTimer->Queue( queueTimer, iDeltaEntry );
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    iRetransTimer = iRetransTimer * KTransInterval;    
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    }
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// -----------------------------------------------------------------------------
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// CMceReliableSender::ResponseCloneL
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// -----------------------------------------------------------------------------
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//
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CSIPResponseElements* CMceReliableSender::ResponseCloneL( 
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                                            CSIPResponseElements& aElements )
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    {
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	CSIPResponseElements* cElements = 
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	    CSIPResponseElements::NewLC( aElements.StatusCode(), 
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	                                 aElements.ReasonPhrase() );
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	// Creating messge Elements
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	CSIPMessageElements& msgElements = aElements.MessageElements();
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	CSIPMessageElements& cloneMsgElements = cElements->MessageElements();
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	// Copying Contents 
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	if  ( msgElements.Content().Length() )
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	    {
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    	const CSIPContentTypeHeader* contentType = msgElements.ContentType();
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		CSIPContentTypeHeader* cloneContentType = 
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		    static_cast<CSIPContentTypeHeader *>( contentType->CloneL() );
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		CleanupStack::PushL( cloneContentType );
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		HBufC8* contentBuffer = HBufC8::NewLC( msgElements.Content().Length() );
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		TPtr8 contentsPtr = contentBuffer->Des();
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		contentsPtr.Append( msgElements.Content() );
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		cloneMsgElements.SetContentL( contentBuffer, cloneContentType );
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		CleanupStack::Pop( contentBuffer );
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		CleanupStack::Pop( cloneContentType );
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    	}
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  	// User Headers
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	const RPointerArray<CSIPHeaderBase>& headers = msgElements.UserHeaders();
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	if  ( headers.Count() )
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	    {
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		RPointerArray<CSIPHeaderBase> tmpHeaders;
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		CSIPHeaderBase::PushLC( &tmpHeaders );
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		for(TInt i = 0; i < headers.Count(); i++)
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		    {
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			CSIPHeaderBase* userHeader = headers[i]->CloneL();
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			CleanupStack::PushL( userHeader );
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			tmpHeaders.AppendL( userHeader );
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			CleanupStack::Pop( userHeader );
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		    }
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		cloneMsgElements.SetUserHeadersL( tmpHeaders );
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		CleanupStack::Pop( &tmpHeaders );
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	    }
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    CleanupStack::Pop( cElements );
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	return cElements;
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    }
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// -----------------------------------------------------------------------------
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// CMceReliableSender::PrackReceived
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// -----------------------------------------------------------------------------
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//
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TBool CMceReliableSender::PrackReceived( CSIPServerTransaction& aPrack )
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    {
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	TBool transactionMatched = EFalse;
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	RStringF rackHeaderStr = SIPStrings::StringF( SipStrConsts::ERAckHeader );
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	RStringF rseqStr = SIPStrings::StringF( SipStrConsts::ERSeqHeader );
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   227
			
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	const CSIPRequestElements* reqElements = aPrack.RequestElements();
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	CSIPHeaderBase*	headerBase = 
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	    MceSip::FindHeader( reqElements->MessageElements(), rackHeaderStr );
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	const CSIPRAckHeader* rackHeader = static_cast<CSIPRAckHeader *>( headerBase );
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	const CSIPRequestElements* sReqElements = iServerTransaction->RequestElements();    
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    const CSIPCSeqHeader* cseqHeader = sReqElements->CSeqHeader();
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    CSIPHeaderBase* headerBase3 =  
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        MceSip::FindHeader( iResponseElements->MessageElements(), rseqStr );
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    const CSIPRSeqHeader* rseqHeader = static_cast<CSIPRSeqHeader *> ( headerBase3 );
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   	if  ( ( rackHeader && cseqHeader && rseqHeader ) && 
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   	    ( rackHeader->CSeqNum() == cseqHeader->Seq() ) &&
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	    ( rackHeader->Method() == sReqElements->Method() ) && 
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	    ( rackHeader->Seq() == rseqHeader->Value()) )
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	    {
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	    MCESRV_DEBUG( "CMceReliableSender::PrackReceived: prack matched");
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	    transactionMatched = ETrue;
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        }
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    if  ( transactionMatched )
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	    {
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        // Cease the Re-Transmission of Reliable Response 
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        iDTimer->Remove( iDeltaEntry ); 
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        iTransactionMatched = ETrue;
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        iTransactionStatus = EFalse;    
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      	return ETrue;
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  	    }
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    MCESRV_DEBUG( "CMceReliableSender::PrackReceived: no prack matched");
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    return EFalse;
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    }
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// -----------------------------------------------------------------------------
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// CMceReliableSender::TimerExpire
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// -----------------------------------------------------------------------------
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//
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TInt CMceReliableSender::TimerExpire( TAny *aSelf )
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    { 
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    TInt error;
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    TUint queueTimer;
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    TUint tmpTotalTime;
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    CMceReliableSender* me = static_cast<CMceReliableSender *>( aSelf );
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    if ( !me->iTransTimeoutFlag )        
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        {
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        TRAP(error, me->CloneAndSendResponseL());
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        if ( error )
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            {
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            me->iObserver->ReliableFailed( *me->iServerTransaction, error );
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            }
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        }
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    else 
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        {
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        me->TimeOut( me->iServerTransaction );    
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        }
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   292
		
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	if ( me->iRetransTimer <= KMaxTransTimeOut && me->iTransactionStatus )
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		{
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	    tmpTotalTime = me->iTotaltime;
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		me->iTotaltime = me->iTotaltime + me->iRetransTimer; // acumlated time
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		if ( me->iTotaltime <= KMaxTransTimeOut )
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		    {
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		    queueTimer = me->iRetransTimer * me->iT1 * KConversionMilliToMicro;
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		    }
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        else 
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           {
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            me->iTotaltime = tmpTotalTime;
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            queueTimer = ( KMaxTransTimeOut - me->iTotaltime ) * me->iT1 * KConversionMilliToMicro;
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            me->iTransTimeoutFlag = ETrue;
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            }
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        me->iDTimer->Queue( queueTimer, me->iDeltaEntry );
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        me->iRetransTimer = me->iRetransTimer * KTransInterval;
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        MCESRV_DEBUG_DVALUE( 
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		"CMceReliableSender::TimerExpire: timer added", me->iRetransTimer );
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		}
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	return KErrNone;
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    }
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// -----------------------------------------------------------------------------
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// CMceReliableSender::CloneAndSendResponseL 
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// -----------------------------------------------------------------------------
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//
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void CMceReliableSender::CloneAndSendResponseL()
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    {
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    CSIPResponseElements* oResponses;
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    oResponses = ResponseCloneL( *iResponseElements );
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    MCESRV_DEBUG( 
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        "CMceReliableSender::CloneAndSendResponseL: responseElements cloned");
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    CleanupStack::PushL( oResponses );
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    iServerTransaction->SendResponseL( oResponses );
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    MCESRV_DEBUG( 
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        "CMceReliableSender::CloneAndSendResponseL: reliableResponse sent");
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    CleanupStack::Pop( oResponses );
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    }
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// -----------------------------------------------------------------------------
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// CMceReliableSender::TimeOut
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// -----------------------------------------------------------------------------
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//
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void CMceReliableSender::TimeOut( CSIPServerTransaction* aTransaction )
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    {  
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	iObserver->NoPrackReceived( *aTransaction ); 
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	}
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