/*

* Copyright (c) 2007-2009 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:  Keepalive object for Nokia IPsec over NAT

*

*/

#ifndef C_IKEV1NOKIANATTKEEPALIVE_H

#define C_IKEV1NOKIANATTKEEPALIVE_H

#include <in_sock.h> // TInetAddr

class CIkev1PluginSession;

class MIkeDebug;

/**

 * Nokia IPsec over NAT keepalive object. Sends

 * UDP packets to specified host with specified

 * interval to keep NAT mapping alive. Constructing

 * the object starts sending and sending is stopped

 * when destruction happens.

 * @internalComponent

 */

NONSHARABLE_CLASS(CIkev1NokiaNattKeepAlive) : public CBase

	{

public: // Public constructor and destructor

	static CIkev1NokiaNattKeepAlive* NewL( CIkev1PluginSession&  aPluginSession, 

			                          TInetAddr& aDestAddr,

			                          TUint16 aPort,

			                          TUint aInterval,

			                          MIkeDebug& aDebug );

	virtual ~CIkev1NokiaNattKeepAlive();

private: // Private constructors

	CIkev1NokiaNattKeepAlive( CIkev1PluginSession&  aPluginSession,

	                          TInetAddr& aDestAddr, 

	                          TUint16 aPort,

	                          MIkeDebug& aDebug );

	void ConstructL( TUint aInterval );

private:

	/**

	 * Send

	 * Sends keepalive packet

	 */

	void Send();

	/**

	 * PeriodicCallback

	 * Callback function which is called everytime

	 * the interval is reached.

	 */

	static TInt PeriodicCallback(TAny *aPtr);

private:

    CIkev1PluginSession&  iPluginSession;

	TInetAddr iDestAddr;

	TUint iPort;

	/** Data to send in keepalive packet */

	TBuf8<1> iMsg;

	CPeriodic *iTimer;

	MIkeDebug& iDebug;

	};

#endif // C_IKEV1NOKIANATTKEEPALIVE_H