/*

* Copyright (c) 2006-2008 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:    Receive data from User of NAT Connectivity Framework.

*

*/

#ifndef C_SOCKET_RECEIVER_H

#define C_SOCKET_RECEIVER_H

#include <e32base.h>

#include <es_sock.h> 

#include <in_sock.h>

#include "natfwconnectivityapidefs.h"

#include "natfwsocketreceiverobserver.h"

const TUint KReceiveBuffer = 8192;

/**

 *  Data receiver

 *

 *  Receive data from User of NAT Connectivity Framework.

 *

 *  @lib socketmediaconnwrapper.dll

 *  @since S60 v3.2

 */

NONSHARABLE_CLASS( CNATFWSocketReceiver ) : public CActive

    {

    friend class ut_cnatfwsocketreceiver;

public:

    /**

     * Two-phased constructor.

     * @param aRecObs reveive observer

     * @param aProtocol used protocol

     */       

    static CNATFWSocketReceiver* NewL( MNATFWSocketReceiverObserver& aRecObs,

                                       TUint aProtocol );

    virtual ~CNATFWSocketReceiver();

    /**

     * Starts listening data from remote address.

     * 

     * @since S60 v3.2

     * @param aSocket socket handle

     * @return void

     */  

    void StartListening( const RSocket& aSocket );

    /**

     * Enables wrapper to forward packets from mediaengine to connection

     * multiplexer.

     * 

     * @since S60 v3.2

     * @param   aState          The sending state

     * @return void

     */     

    void SetReceivingStateForMuxWrapper( TNATFWStreamingState aState );    

private:

    CNATFWSocketReceiver( MNATFWSocketReceiverObserver& aRecObs, 

                          TUint aProtocol );

// from base class CActive

    /* From CActive

     * 

     *

     * @since S60 v3.2

     */

    void RunL();

    /* From CActive

     * 

     *

     * @since S60 v3.2

     */

    void DoCancel();

    /* From CActive

     * 

     *

     * @since S60 v3.2

     */

    TInt RunError( TInt aError );

private: // data

    /**

     * Used protocol udp or tcp

     */

    TUint iProtocol;

    /**

     * Socket

     */

    RSocket iSocket;

    /**

     * Observer

     * Not own.

     */

    MNATFWSocketReceiverObserver& iObserver;

    /**

     * Data buffer

     */

    TBuf8<KReceiveBuffer> iBuffer;

    /**

     * Remote address

     */

    TSockAddr iRemoteAddress;

    /**

     * Data length

     */    

    TSockXfrLength iSockDataLength;

    /**

     * Receiving state for wrapper mux datapath

     */

    TNATFWStreamingState iWrapperMuxReceiveState; 

    };

#endif // C_SOCKET_RECEIVER_H