/*

* 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:    Transmit indications to sender

*

*/

#ifndef C_STUNINDICATIONTRANSMITTER_H

#define C_STUNINDICATIONTRANSMITTER_H

#include <e32base.h>

#include <in_sock.h>

#include "cnatfwunsafmediaconnsender.h"

#include "mncmsenderobserver.h"

#include "cnatfwunsaftcprelaypacketsender.h"

class CNATFWUNSAFMessage;

class CNATFWUNSAFBindingRequest;

class MNcmConnectionMultiplexer;

/**

 *  Class for transmitting indications to multiplexer.

 *  Multiplexer acts as sender, meaning it will send indications 

 *  eventually to network .

 *

 *  @lib    natfwstunclient.lib

 *  @since  S60 v3.2

 */

class CStunIndicationTransmitter : public CBase

    {

public:

    /**

     * Two-phased constructor.

     * @param aMux          multiplexer

     * @param aStreamId     stream identifier

     * @param aConnectionId connection identifier

     */

    static CStunIndicationTransmitter* NewL( MNcmConnectionMultiplexer& aMux,

                                             TUint aStreamId,

                                             TUint aConnectionId );

    /**

     * Destructor.

     */

    virtual ~CStunIndicationTransmitter();

    /**

     * Transmits indication to multiplexer's send queue.

     *

     * @since   S60 v3.2

     * @param   aIndication     indication to send 

     * @return  void

     */

    void TransmitL( CNATFWUNSAFMessage& aIndication );

    /**

     * Transmits indication to multiplexer's send queue.

     *

     * @since   S60 v3.2

     * @param   aIndication     indication to send 

     * @param   aAddress        address to send to (destination)

     * @param   aSharedSecret   shared secret

     *                          optional - added if authentication needed

     * @param   aAddFingerprint fingerprint; added or not

     *                          optional - by default EFalse

     * @return  void

     */

    void TransmitL( CNATFWUNSAFMessage& aIndication,

                    const TInetAddr& aAddress,

                    const TDesC8& aSharedSecret=KNullDesC8(),

                    TBool aAddFingerprint=EFalse );

    /**

     * Transmits indication to multiplexer's send queue by using TCP relay

     * packet sender.

     *

     * @since   S60 v3.2

     * @param   aMessage TCP relay message

     * @return  void

     */

    void TransmitL( const CNATFWUNSAFTcpRelayPacket& aMessage );                    

private:

    CStunIndicationTransmitter();

    CStunIndicationTransmitter( MNcmConnectionMultiplexer& aMux,

                                TUint aStreamId,

                                TUint aConnectionId );

    void ConstructL();

private: // data

    /**

     * multiplexer

     * not own.

     */

    MNcmConnectionMultiplexer& iMux;

    /**

     * stream identifier

     */

    TUint iStreamId;

    /**

     * connection identifier

     */

    TUint iConnectionId;

    /**

     * media connection sender

     * own.

     */

    CNATFWUNSAFMediaConnSender* iSender;

    /**

     * TCP relay packet sender

     * Own.

     */

    CNATFWUNSAFTcpRelayPacketSender* iTcpRelaySender; 

    };

#endif // C_STUNINDICATIONTRANSMITTER_H