/*

* Copyright (c) 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: 

*

*/

#ifndef CNATBINDINGSTUNREFRESHER_H

#define CNATBINDINGSTUNREFRESHER_H

//  INCLUDES

#include "cnatbindingrefresher.h"

// FORWARD DECLARATIONS

class CNATBinding;

// CLASS DECLARATION

/**

* A class for STUN based NAT binding refresh.

*/

class CNATBindingSTUNRefresher : public CNATBindingRefresher

    {

    public:  // Constructors and destructor

        CNATBindingSTUNRefresher(

            CDeltaTimer& aDeltaTimer,

            TInt aRefreshInterval,

            MNATBindingRefresherObserver& aObserver,

            CNATBinding& aNATBinding );

        ~CNATBindingSTUNRefresher();

    public: // From CNATBindingRefresher

        TBool HasSocket(const RSocket& aSocket) const;

    protected: // From CNATBindingRefresher

        TInt RefreshInterval();

        virtual void RefreshTimerExpiredL();

        virtual void CancelRefresh();

    protected: // Data

        CNATBinding& iNATBinding;

    private: // Data

        TInt iRefreshInterval;

        TInt64 iRandomSeed;

    friend class UT_CNATBindingSTUNRefresher;

    };

#endif // CNATBINDINGSTUNREFRESHER_H

// End of File