/*

* 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:    Send data to User of NAT Connectivity Framework.

*

*/

#ifndef C_SOCKET_SENDER_H

#define C_SOCKET_SENDER_H

#include <e32base.h>

#include <es_sock.h> 

#include <in_sock.h>

#include "natfwsocketsenderobserver.h"

#include "cnsmcwsenditem.h"

/**

 *  Data sender

 *

 *  Send data to User of NAT Connectivity Framework.

 *

 *  @lib socketmediaconnwrapper.dll

 *  @since S60 v3.2

 */

NONSHARABLE_CLASS( CNATFWSocketSender ) : public CActive

    {

    friend class ut_cnatfwsocketsender;

public:

    /**

     * Two-phased constructor.

     * @param aObserver sender observer

     * @param aProtocol used protocol

     */    

    static CNATFWSocketSender* NewL( 

        MNATFWSocketSenderObserver& aObserver, TUint aProtocol );

    virtual ~CNATFWSocketSender();

    /**

     * Set remote address

     *

     * @since S60 v3.2

     * @param aRemoteAddress remote address

     * @param aSocket        socket handle

     * @return void

     */      

    void SetRemoteAddress( const TSockAddr& aRemoteAddress, 

                           const RSocket& aSocket );

    /**

     * Send data to connected media engine.

     *

     * @since S60 v3.2

     * @param aStreamPortion a reference to buffer where received data put

     * @return void

     */   

    void SendL( const TDesC8& aStreamPortion );

private:

    CNATFWSocketSender( MNATFWSocketSenderObserver& aObserver, 

                        TUint aProtocol );

    /**

     * Send next packet from the queue

     *

     * @since S60 v3.2

     * @return void

     */  

    void SendNextPacket();

    /**

     * Remove item from queue

     *

     * @since S60 v3.2

     * @return void

     */  

    void RemoveFromQueue();

// from base class CActive

    /* From CActive

     * 

     *

     * @since S60 v3.2

     */

    void RunL();

    /* From CActive

     * 

     *

     * @since S60 v3.2

     */

    void DoCancel();

private: // data

    /**

     * Socket

     */

    RSocket iSocket;

    /**

     * Used protocol udp or tcp.

     */

    TUint iProtocol;

    /**

     * Remote address

     */

    TSockAddr iRemoteAddress;

    /**

     * Observer

     */

    MNATFWSocketSenderObserver& iObserver;

    /**

     * Send queue

     */

    TSglQue <CNsmcwSendItem> iSendQueue;

    /**

     * List iterator which is needed to delete all the items

     */

    TSglQueIter<CNsmcwSendItem> iQueueIter;

    };

#endif // C_SOCKET_SENDER_H