/*

* 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 CNATBINDING_H

#define CNATBINDING_H

//  INCLUDES

#include <in_sock.h>

#include <e32base.h>

#include "mnatbindingrefresherobserver.h"

#include "nattraversalsocketuser.h"

// FORWARD DECLARATIONS

class CSTUNBinding;

class MSIPNATTraversalRequestObserver;

class MSIPNATBindingObserver;

class MNATTraversalSocketManager;

class CNATBindingRefresher;

// CLASS DECLARATION

/**

* NAT binding.

*/

class CNATBinding : public CBase,

                    public MNATBindingRefresherObserver,

                    public MNATTraversalSocketUser

    {

    public:  // Constructors and destructor

        static CNATBinding* NewL(

            TUint32 aInitialRequestId,

            RSocket& aSTUNSocket,

            const TInetAddr& aLocalAddr,

            MSIPNATTraversalRequestObserver& aInitialRequestObserver,

            MSIPNATBindingObserver& aBindingObserver,

            MNATTraversalSocketManager& aSocketManager);

        static CNATBinding* NewLC(

            TUint32 aInitialRequestId,

            RSocket& aSTUNSocket,

            const TInetAddr& aLocalAddr,

            MSIPNATTraversalRequestObserver& aInitialRequestObserver,

            MSIPNATBindingObserver& aBindingObserver,

            MNATTraversalSocketManager& aSocketManager);

        ~CNATBinding();

    public: // New functions

        TBool PersistentConnectionRequired() const;

        RSocket& STUNSocket();

        void SetBinding(CSTUNBinding* aBinding);

        CSTUNBinding* Binding();

        void SendSTUNRequestL();

        void SetBindingFailed(TInt aError);

        TBool SetPublicAddr(const TInetAddr& aPublicAddr);

        void SetRefresher(CNATBindingRefresher* aRefresher);

        CNATBindingRefresher* Refresher();

        TUint32 InitialRequestId() const;

        MSIPNATBindingObserver& NATBindingObserver();

        TBool AddressResolved() const;

        const TInetAddr& PublicAddr() const;

        void HandleDataL(const TDesC8& aData,

                         const RSocket& aSocket,

                         TBool& aConsumed);

        void ContinueRefreshing();

    public: // From MNATBindingRefresherObserver

        void NATBindingRefreshComplete(TInt aCompletionCode);

    public: // MNATTraversalSocketUser

        const RSocket& Socket() const;

        void SendingAllowed();

        TBool IsSending() const;

        void CancelSending();

    private: // Constructors

        CNATBinding(

            TUint32 aInitialRequestId,

            RSocket& aSocket,

            const TInetAddr& aLocalAddr,

            MSIPNATTraversalRequestObserver& aInitialRequestObserver,

            MSIPNATBindingObserver& aBindingObserver,

            MNATTraversalSocketManager& aSocketManager);

    private: // New functions

        void SendingCompleted();

    private: // Data

        TUint32 iInitialReqId;

        RSocket& iSTUNSocket;

        MSIPNATTraversalRequestObserver& iInitialReqObserver;

        MSIPNATBindingObserver& iBindingObserver;

        MNATTraversalSocketManager& iSocketManager;

        TInetAddr iPublicAddr;

        TBool iAddressResolved;

        CSTUNBinding* iBinding; // owned

        CNATBindingRefresher* iRefresher; // owned

        TBool iIsSending;

    };

#endif // CNATBINDING_H

// End of File