/*

* Copyright (c) 2003-2007 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  Common keep alive object

*

*/

#include "ikev2keepalive.h"

#include "ikemsgheader.h"

#include "ikev2pluginsession.h"

CIkeV2KeepAlive* CIkeV2KeepAlive::NewL(TInt DpdKeepAlive, MIkeV2DpdHeartBeatEventHandler& aHandler)

{

    CIkeV2KeepAlive* self = new (ELeave) CIkeV2KeepAlive(DpdKeepAlive, aHandler);

    CleanupStack::PushL(self);                        

    self->ConstructL();

    CleanupStack::Pop(self);                          

    return self;

}

//Constructor

CIkeV2KeepAlive::CIkeV2KeepAlive(TInt aDpdKeepAlive, 

                                 MIkeV2DpdHeartBeatEventHandler& aHandler) 

: CTimer(EPriorityStandard), iCallback(aHandler), iDpdKeepAlive(aDpdKeepAlive)

{	

    __ASSERT_DEBUG(iDpdKeepAlive > 0, User::Invariant());

    CActiveScheduler::Add(this);

}

//Destructor

CIkeV2KeepAlive::~CIkeV2KeepAlive()

{

    if (IsActive())

        Cancel();

}

void CIkeV2KeepAlive::ConstructL()

{

   //

   // If NAT keepalive timoeut allocate (and initialize) a TIkeXmitBfr data buffer for

   // NAT keepalive. Allocate a data buffer for special "Echo request"

   // keepalive message, if proprietary "Nokia NAT Traversal is used".

   // Start keep alive timer

   //

   CTimer::ConstructL();

   iRemainingTime = iDpdKeepAlive;

   StartTimer();			

}

void CIkeV2KeepAlive::DoCancel()

{

    CTimer::DoCancel();

}

void CIkeV2KeepAlive::RunL()

{

	if ( iRemainingTime == 0 && iDpdKeepAlive) 

	{	

        iCallback.EventHandlerL();

        iRemainingTime = iDpdKeepAlive;				 			  		 	   

	}	

    StartTimer();	

}

void CIkeV2KeepAlive::StartTimer()

{

	if ( iRemainingTime > KMaxTInt/1000000 )   //To avoid overflowing the Timer

	{

		iRemainingTime -= KMaxTInt/1000000;

		After(KMaxTInt);

	}

	else    //No overflow

	{

		if ( iRemainingTime )

		   After(iRemainingTime*1000000);

		iRemainingTime = 0;

	}

}