vpnengine/ikev2lib/src/ikev2sa.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 09:14:51 +0200
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/*
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* Copyright (c) 2003-2007 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:  IKEv2 SA
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*
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*/
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#include "ikedebug.h"
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#include "ikev2SA.h"
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#include "ikepolparser.h"
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#include "ikev2ipsecsadata.h"
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#include "ikev2pluginsession.h"
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CIkev2SA* CIkev2SA::NewL(CIkev2PluginSession& aIkeV2PluginSession, TIkev2SAData& aIkev2SAdata, MIkeDebug& aDebug)
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{
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	CIkev2SA *sa = new (ELeave) CIkev2SA(aIkeV2PluginSession, aDebug);
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	sa->ConstructL(aIkev2SAdata);
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	return sa;
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}
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CIkev2SA::CIkev2SA(CIkev2PluginSession& aIkeV2PluginSession, MIkeDebug& aDebug)
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:CTimer(EPriorityStandard), iIkeV2PluginSession(aIkeV2PluginSession), iDebug(aDebug)
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{
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    CActiveScheduler::Add(this);
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}
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void CIkev2SA::ConstructL(TIkev2SAData& aIkev2SAdata)
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{
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	CTimer::ConstructL();		
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	iIkeV2SaData.Copy(aIkev2SAdata);
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	//
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	// Calculate lifetime value for the new IKE SA
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	// The jitter value is adjusted from SA internal ID (SAId mod 8) 
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	//
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    iRemainingTime = iIkeV2SaData.iLifetime + (iIkeV2SaData.SaId() % 8);
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	iIkeV2SaData.iSAState  = KSaStateReady;
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	TInt DPDHeartbeat = 0;
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	if ( iIkeV2SaData.iIkeData->iDPDHeartBeat )
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	   DPDHeartbeat = iIkeV2SaData.iIkeData->iDPDHeartBeat;      
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	if ( DPDHeartbeat )
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	{
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		iIkeKeepAlive = CIkeV2KeepAlive::NewL(DPDHeartbeat, *this);
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	}
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	DEBUG_LOG2(_L("IKEv2 SA constructed, SAId: %d, Lifetime: %d"), iIkeV2SaData.SaId(), iRemainingTime);
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	StartTimer();
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}
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CIkev2SA::~CIkev2SA()
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{
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    if (IsActive())
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        Cancel();
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	PurgeIpsecDataQue();  	
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	iIkeV2SaData.CleanUp();
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	delete iIkeKeepAlive;	
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}
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void CIkev2SA::DoCancel()
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{
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    CTimer::DoCancel();
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}
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void CIkev2SA::UpdateL(TIkev2SAData* aIkev2SAdata, TIkeV2IpsecSAData* aIpsecSAdata)
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{
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    DEBUG_LOG(_L("CIkev2SA::UpdateL"));
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	if ( aIkev2SAdata )
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	{
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	   //
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	   // Update IKE Sa data information and reset/restart IKE SA lifetime
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	   //
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	    iIkeV2SaData.Copy(*aIkev2SAdata);
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	    iIkeV2SaData.iSAState = KSaStateReady;		
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	}
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	if ( aIpsecSAdata )
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	{
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	   //
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	   // Link an Ipsec SA pair information into IKE SA
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	   //
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		TIkeV2IpsecSAData* IpsecSA = new (ELeave) TIkeV2IpsecSAData(iDebug);
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		IpsecSA->Copy(*aIpsecSAdata);
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		LinkIpsecSa(IpsecSA);						  
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		DEBUG_LOG3(_L("Ipsec SA added into IKE SA, SAId: %d, In SPI: %d, Out SPI: %d"),
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				   iIkeV2SaData.SaId(), &aIpsecSAdata->iSPI_In, &aIpsecSAdata->iSPI_Out);
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	}
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}
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TBool CIkev2SA::RemoteAddrChanged(TInetAddr& aNewIp)
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{
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#if __DEBUG
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	TBuf<40> txt_addr;				
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	aNewIp.OutputWithScope(txt_addr);
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   112
	DEBUG_LOG2(_L("Remote IP changed IKE SA: %d, new address %S"), iIkeV2SaData.SaId(), &txt_addr);
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parents:
diff changeset
   113
#endif //__DEBUG
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parents:
diff changeset
   114
	aNewIp = aNewIp; //To silence UREL warnings: contents of DEB macro invisible in UREL builds
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parents:
diff changeset
   115
	
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   116
	return ETrue;
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diff changeset
   117
}
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parents:
diff changeset
   118
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parents:
diff changeset
   119
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   120
TIkeV2IpsecSAData* CIkev2SA::RemoveIpsecSaData(const TDesC8& aInSpi, const TDesC8& aOutSpi)
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parents:
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   121
{ 
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   122
    return FindIpsecSaData(aInSpi, aOutSpi, ETrue); 
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diff changeset
   123
} 
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parents:
diff changeset
   124
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parents:
diff changeset
   125
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   126
TIkeV2IpsecSAData* CIkev2SA::FindIpsecSaData(const TDesC8& aInSpi, const TDesC8& aOutSpi, TBool aRemove)
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parents:
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   127
{
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parents:
diff changeset
   128
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   129
    __ASSERT_DEBUG( aInSpi.Length() == 4 || aInSpi.Length() == 0, User::Invariant() );
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   130
    __ASSERT_DEBUG( aOutSpi.Length() == 4 || aOutSpi.Length() == 0, User::Invariant() );
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parents:
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   131
    __ASSERT_DEBUG( aInSpi.Length() != 0 || aOutSpi.Length() != 0, User::Invariant() );
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diff changeset
   132
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   133
	TInt Found = 0;
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   134
	if ( aInSpi.Length() > 0 )
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   135
		Found ++;
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parents:
diff changeset
   136
	if ( aOutSpi.Length() > 0 )
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   137
		Found ++;
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   138
	if ( Found == 0 )
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   139
	   return NULL;	
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff changeset
   140
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   141
	TInt Match;
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   142
	TIkeV2IpsecSAData* Prev = NULL;
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   143
	TIkeV2IpsecSAData* Sa   = iIpsecSaQue;
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diff changeset
   144
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   145
	while ( Sa )
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parents:
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   146
	{
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   147
		Match = 0;
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   148
		if ( aInSpi.Length() > 0 && (aInSpi.Compare(Sa->iSPI_In) == 0))
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   149
           Match ++;   		
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parents:
diff changeset
   150
		if ( aOutSpi.Length() > 0 && (aOutSpi.Compare(Sa->iSPI_Out) == 0) )
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parents:
diff changeset
   151
		   Match ++;
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parents:
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   152
		if ( Match == Found )
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parents:
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   153
		{
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parents:
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   154
		   if ( aRemove )
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parents:
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   155
		   {
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parents:
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   156
			  if ( Prev )
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   157
				   Prev->iNext = Sa->iNext;
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parents:
diff changeset
   158
			  else iIpsecSaQue = Sa->iNext;
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parents:
diff changeset
   159
		   }	   
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   160
		   break;
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parents:
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   161
		}
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parents:
diff changeset
   162
		Prev = Sa;
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parents:
diff changeset
   163
		Sa   = Sa->iNext;
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parents:
diff changeset
   164
	}
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diff changeset
   165
	return Sa;
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parents:
diff changeset
   166
}
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parents:
diff changeset
   167
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parents:
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   168
void CIkev2SA::DeleteIpsecSaData(const TDesC8& aInSpi, const TDesC8& aOutSpi)
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parents:
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   169
{
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   170
	TIkeV2IpsecSAData* SaData = FindIpsecSaData(aInSpi, aOutSpi, ETrue);
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parents:
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   171
	if ( SaData )
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parents:
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   172
	{
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parents:
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   173
		SaData->PurgeKeyMaterial();
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parents:
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   174
		SaData->DeleteRekeyData();
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parents:
diff changeset
   175
		DeleteIpsecSas(SaData);		
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parents:
diff changeset
   176
		delete SaData;
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parents:
diff changeset
   177
	}	
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parents:
diff changeset
   178
}
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parents:
diff changeset
   179
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   180
void CIkev2SA::LinkIpsecSa(TIkeV2IpsecSAData* aSa) 
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   181
{
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   182
    ASSERT(aSa);
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parents:
diff changeset
   183
    aSa->iNext = iIpsecSaQue; 
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parents:
diff changeset
   184
    iIpsecSaQue = aSa;
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parents:
diff changeset
   185
}   
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parents:
diff changeset
   186
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parents:
diff changeset
   187
void CIkev2SA::PurgeIpsecDataQue()
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parents:
diff changeset
   188
{
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parents:
diff changeset
   189
	
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   190
	TIkeV2IpsecSAData* Sa = iIpsecSaQue;
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   191
	while ( iIpsecSaQue )
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parents:
diff changeset
   192
	{
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parents:
diff changeset
   193
		iIpsecSaQue = Sa->iNext;
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   194
		Sa->PurgeKeyMaterial();
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   195
		Sa->DeleteRekeyData();
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parents:
diff changeset
   196
		DeleteIpsecSas(Sa);
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parents:
diff changeset
   197
		delete Sa;
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parents:
diff changeset
   198
		Sa = iIpsecSaQue;
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parents:
diff changeset
   199
	}	
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parents:
diff changeset
   200
}
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parents:
diff changeset
   201
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   202
void CIkev2SA::DeleteIpsecSas(TIkeV2IpsecSAData* aSa)
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parents:
diff changeset
   203
{
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parents:
diff changeset
   204
    ASSERT(aSa);
33413c0669b9 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   205
	TInetAddr LocalAddr;
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   206
	if ( aSa->iSrcSpecific )
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   207
		 LocalAddr = iIkeV2SaData.iLocalAddr;
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   208
	else LocalAddr.Init(0); 
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   209
	LocalAddr.SetPort(0);	
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   210
	TInetAddr RemoteAddr = iIkeV2SaData.iRemoteAddr;
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   211
	RemoteAddr.SetPort(0);
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   212
	if ( aSa->iSPI_In.Length() > 0 ) 
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parents:
diff changeset
   213
	{
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parents:
diff changeset
   214
        TUint32 spi;
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   215
        TPtr8 spiPtr(reinterpret_cast<TUint8*>(&spi), sizeof(spi));
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   216
        spiPtr = aSa->iSPI_In;
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   217
		iIkeV2PluginSession.DeleteIpsecSA(spi, RemoteAddr, LocalAddr, aSa->iSaType);
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parents:
diff changeset
   218
	}
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   219
	if ( aSa->iSPI_Out.Length() > 0 )
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   220
	{
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parents:
diff changeset
   221
        TUint32 spi;
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   222
        TPtr8 spiPtr(reinterpret_cast<TUint8*>(&spi), sizeof(spi));
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   223
        spiPtr = aSa->iSPI_Out;
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   224
        iIkeV2PluginSession.DeleteIpsecSA(spi, LocalAddr, RemoteAddr, aSa->iSaType);
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	}
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}
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void CIkev2SA::RunL()
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{
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	//
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	// If IKE SA lifetime expired, delete IKE SA if there is no
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	// active IPSEC SA:s alive. If there is rekey IKE SA.
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	//
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    DEBUG_LOG2(_L("CIkev2SA::RunL, SAId=%d, remaining time=%d"),
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            iIkeV2SaData.SaId(), iRemainingTime );
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	if (iRemainingTime == 0) 
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	{										 		
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		if ( iIpsecSaQue )
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		{
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		    iIkeV2PluginSession.RekeyIkeSAL(&iIkeV2SaData);
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		}
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		else 
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		{		 
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		    iIkeV2PluginSession.DeleteIkeSAL(&iIkeV2SaData, ETrue); // "Normal" close
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		}
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	}
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	else StartTimer();
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}
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void CIkev2SA::StartTimer()
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{
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	if (iRemainingTime > KMaxTInt/SECOND)   //To avoid overflowing the Timer
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	{
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		iRemainingTime -= KMaxTInt/SECOND;
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		After(KMaxTInt);
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	}
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	else    //No overflow
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	{
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		After(iRemainingTime*SECOND);
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		iRemainingTime = 0;
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	}
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}
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void CIkev2SA::EventHandlerL()
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{
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	//
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	// The implementation for class MDpdHeartBeatEventHandler virtual function
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	// This method is called by an CIkeKeepAlive object instance when
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	// DPD heartbeat timeout has elapsed.
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	//
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    iIkeV2PluginSession.KeepAliveIkeSAL(&iIkeV2SaData);
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}
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TIkeV2IpsecSAData* CIkev2SA::GetIpsecSaQue()
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{ 
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    TIkeV2IpsecSAData* Que = iIpsecSaQue; 
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    iIpsecSaQue = NULL; 
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    return Que; 
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}
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void CIkev2SA::SetIpsecSaQue(TIkeV2IpsecSAData* aQue) 
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{ 
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    if (aQue != NULL) 
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        { 
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        LinkIpsecSa(aQue); 
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        } 
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}
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