rtp/srtpstack/inc/srtppacketsrtcp.h
author Petteri Saari <petteri.saari@digia.com>
Thu, 25 Nov 2010 13:59:42 +0200
branchMSRP_FrameWork
changeset 58 cdb720e67852
parent 0 307788aac0a8
permissions -rw-r--r--
This release addresses the following issues: 1. The crash bug fix when receiving file 2. Now the sending is based on MSRP messages, there is no longer file receiving or sending. Client sends data as MSRP was designed. 3. Soma MSRP stack was created so that the client told the correct session-id, Symbian stack generated it by itself. This is not allowed, it was changed so that clients tell the session-id (same as used in SIP INVITE). 4. Unnecessary division of data to chunks removed when there is no need to interrupt sending. The message is sent in as few chunks as possible. 5. Stack can now receive files and chunks with ?unlimited? size. Old stack wrote the incoming data to memory and did not utilize disk space until the end of chunk was reached (large chunks from another client crashed it). 6. Now when writing the incoming data to file, it will take into account the byte-range header values. So, this complies with the RFC4975 requirements that stack must be able to handle chunks that come in any sequence. 7. Some buffering changes to outgoing/incoming data. 8. The outgoing data is now checked that it does not contain the created transaction-id before sending the data. 9. MSRP success reports are now implemented and tested against servers. 10. Progress report system fixed so progress is now visible on client (all the way to 100%). 11. Message Cancel receiving / Cancel sending now corrected and made to work as rfc4975 requires. (termination from sender and error code from receiver when cancelling). 12. Bug correction related to messages received not belonging to any session, old stack implementation did send error response, but after response was written it did give the buffer to client anyway. Now corrected.

/*
* Copyright (c) 2004 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:    SRTP packet class (SRTCP)
*
*/




#ifndef __SRTP_PACKET_SRTCP_H__
#define __SRTP_PACKET_SRTCP_H__

// INCLUDES
#include <in_sock.h>
#include "srtppacket.h"
#include "srtppacketrtcp.h"


// FORWARD DECLARATIONS
class CSRTPCryptoHandler;
/**
* Contains general SRTCP-specific packet routines
*/
class CSRTPPacketSRTCP : public CSRTPPacketRTCP
    {
    public:
    
        /**
	    * Constructor.
	    * @param aPacket a SRTCP packet
	    * @param aHandler the cryptohandler for this packet
	    * @leave KErrNone if success, system-wide error code otherwise
	    */
    	static CSRTPPacketSRTCP* NewL(const TDesC8& aPacket,
                      CSRTPCryptoHandler& aHandler);

        /**
        * Get authentication tag
        * @return authentication tag
        */                                      
        TPtrC8 AuthenticationTag();   
        
        /**
        * Get master key identifier
        * @return TPtrC8 master key identifier
        */                                                                 
        TPtrC8 MasterKeyIdentifier();

        
        /**
        * Allocate size for decrypted packet and copy payload + header
        * @param aDecryptedPayloadPtr  decrypted payload to be copied
        * @return HBufC8* decrypted packet
        */                                      
        HBufC8* CreateDecryptedPacketL(TUint8* aDecryptedPayloadPtr);

    private: //methods

        CSRTPPacketSRTCP (const TDesC8& aPacket,
                      CSRTPCryptoHandler& aHandler);
        ~CSRTPPacketSRTCP();                
                        
        void ConstructL();          
        
       /**
        * Read Index number and update class member
        * @return void
        */                              
        void UpdatePacketIndex();                          

        /**
        * Update payload length information
        * @return void
        */                              
        void UpdatePayloadLength();
        
        /**
        * Update authentication tag
        * @return void
        */                                      
        void UpdateAuthenticationTag();    
            
        /**
        * Update master key identifier
        * @return void
        */                                      
        void UpdateMasterKeyIdentifier(); 
                   
        /**
        * Count size of the decrypted packet
        * @return TUint size of the decrypted packet
        */                                      
        TUint CountDecryptedPacketSize();  
        
                
        /*
        * Read Master Key Identifier (MKI) from packet
        * @return TPtrC8 pointer to MKI
        */                                            
        TPtrC8 GetAuthenticationTag();   
        
        /*
        * Read Master Key Identifier (MKI) from packet
        * @return TPtrC8 pointer to MKI
        */                                            
        TPtrC8 GetMasterKeyIdentifier();        
                            
                    
    private: //data
        TPtrC8                iAuthenticationTag;   // auth. tag
        TPtrC8                iMasterKeyIdentifier; // MKI
    
    };

#endif // __SRTP_PACKET_SRTCP_H__