1 /*

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

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

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

     6 * which accompanies this distribution, and is available

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

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Common keep alive object

    15 *

    16 */

    17 

    18 

    19 #include "ikev2keepalive.h"

    20 #include "ikemsgheader.h"

    21 #include "ikev2pluginsession.h"

    22 

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

    24 {

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

    26     CleanupStack::PushL(self);                        

    27     self->ConstructL();

    28     CleanupStack::Pop(self);                          

    29     return self;

    30 }

    31 

    32 

    33 //Constructor

    34 CIkeV2KeepAlive::CIkeV2KeepAlive(TInt aDpdKeepAlive, 

    35                                  MIkeV2DpdHeartBeatEventHandler& aHandler) 

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

    37 {	

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

    39     CActiveScheduler::Add(this);

    40 }

    41 

    42 //Destructor

    43 CIkeV2KeepAlive::~CIkeV2KeepAlive()

    44 {

    45     if (IsActive())

    46         Cancel();

    47 }

    48 

    49 

    50 void CIkeV2KeepAlive::ConstructL()

    51 {

    52    //

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

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

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

    56    // Start keep alive timer

    57    //

    58    CTimer::ConstructL();

    59    

    60    iRemainingTime = iDpdKeepAlive;

    61    StartTimer();			

    62 }

    63 

    64 

    65 void CIkeV2KeepAlive::DoCancel()

    66 {

    67     CTimer::DoCancel();

    68 }

    69 

    70 void CIkeV2KeepAlive::RunL()

    71 {

    72 	if ( iRemainingTime == 0 && iDpdKeepAlive) 

    73 	{	

    74         iCallback.EventHandlerL();

    75         iRemainingTime = iDpdKeepAlive;				 			  		 	   

    76 	}	

    77     StartTimer();	

    78 }

    79 

    80 void CIkeV2KeepAlive::StartTimer()

    81 {

    82 	

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

    84 	{

    85 		iRemainingTime -= KMaxTInt/1000000;

    86 		After(KMaxTInt);

    87 	}

    88 	else    //No overflow

    89 	{

    90 		if ( iRemainingTime )

    91 		   After(iRemainingTime*1000000);

    92 		iRemainingTime = 0;

    93 	}

    94 }

    95