/*

* 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 CNATBINDINGCRLFREFRESHER_H

#define CNATBINDINGCRLFREFRESHER_H

//  INCLUDES

#include "cnatbindingrefresher.h"

// FORWARD DECLARATIONS

class CCRLFSender;

// CLASS DECLARATION

/**

* A class for refreshing NAT bindings using CRLF bursts

* over connection oriented transports like TCP and TLS.

*/

class CNATBindingCRLFRefresher : public CNATBindingRefresher

    {

    public:  // Constructors and destructor

        CNATBindingCRLFRefresher(

            CDeltaTimer& aDeltaTimer,

            TInt aRefreshInterval,

            MNATBindingRefresherObserver& aObserver,

            CCRLFSender* aSender );

        ~CNATBindingCRLFRefresher();

    public: // From CNATBindingRefresher

        TBool PersistentConnectionRequired() const;

        TBool HasSocket(const RSocket& aSocket) const;

        TBool HasSocket(const CSecureSocket& aSocket) const;

    protected: // From CNATBindingRefresher

        TInt RefreshInterval();

        void RefreshTimerExpiredL();

        void CancelRefresh();

    private: // Data

        TInt iRefreshInterval;

        CCRLFSender* iSender; // owned

    };

#endif // CNATBINDINGCRLFREFRESHER_H

// End of File