rtp/srtpstack/inc/srtppacketrtcp.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 01:03:15 +0200
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/*
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* Copyright (c) 2004 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:    SRTP packet class (RTCP)
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*
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*/
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#ifndef __SRTP_PACKET_RTCP_H__
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#define __SRTP_PACKET_RTCP_H__
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// INCLUDES
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#include <in_sock.h>
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#include "srtppacket.h"
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// FORWARD DECLARATIONS
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class CSRTPCryptoHandler;
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/**
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* Contains general RTCP-specific packet routines
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*/
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class CSRTPPacketRTCP : public CSRTPPacket
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    {
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    public:
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    	static CSRTPPacketRTCP* NewL(const TDesC8& aPacket,
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                      CSRTPCryptoHandler& aHandler);
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        /**
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        * Create encrypted packet.
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        * @param aEncryptedPayloadPtr  encrypted payload to be copied
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        * @leave KErrNone if success, system-wide error code otherwise        
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        * @return HBufC8* encrypted packet
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        */                              
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        HBufC8* CreateEncryptedPacketL(TUint8* aEncryptedPayloadPtr);
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        /**
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        * virtual function for creating decrypted packet.
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        * @param aDecryptedPayloadPtr  decrypted payload to be copied
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        * @leave KErrNone if success, system-wide error code otherwise        
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        * @return HBufC8* decrypted packet
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        * implemented in CSRTPPacketSRTCP.
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        */                              
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        virtual HBufC8* CreateDecryptedPacketL(TUint8* aDecryptedPayloadPtr);
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        /**
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        * virtual function for getting the authentication tag
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        * implemented in CSRTPPacketSRTCP.
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        */                                      
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        virtual TPtrC8 AuthenticationTag();
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        /**
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        * virtual function for getting the master key identifier
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        * implemented in CSRTPPacketSRTP.
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        */                              
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        virtual TPtrC8 MasterKeyIdentifier();
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        /**
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        * Get packet index.
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        * @return TUint64 packet index.
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        */                              
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        TUint64 PacketIndex();
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       /**
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        * Set packet index.
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        * @param aPacketIndex  new packet index
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        * @return void
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        */                              
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        void SetPacketIndex(TUint64 aPacketIndex);
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		/*
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        * Update header length member
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        * @leave KErrNone if success, system-wide error code otherwise        
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        * @return void
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        */
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        void UpdateHeaderLengthL();        
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    protected: //methods        
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        CSRTPPacketRTCP (const TDesC8& aPacket,
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                      CSRTPCryptoHandler& aHandler);
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        ~CSRTPPacketRTCP(); 
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        /**
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        * Update payload length information
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        * @return void
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        */                              
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        void UpdatePayloadLength();
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        void ConstructL();     
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    private: //methods
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       /**
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        * Count size of the encrypted packet
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        * @return TUint size of the encrypted packet
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        */                                  
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        TUint CountEncryptedPacketSizeL();        
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       /**
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        * Count size of the decrypted packet
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        * @return TUint size of the decrypted packet
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        */                              
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        TUint CountDecryptedPacketSize();                
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    protected: //data    
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        TUint32                     iPacketIndex;       // packet index                      
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    };
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#endif // __SRTP_PACKET_RTCP_H__
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