author | Petteri Saari <petteri.saari@digia.com> |
Thu, 02 Dec 2010 15:23:48 +0200 | |
branch | MSRP_FrameWork |
changeset 60 | 7634585a4347 |
parent 0 | 307788aac0a8 |
permissions | -rw-r--r-- |
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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: Represents receiver (incoming) SRTP stream. |
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* |
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*/ |
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#ifndef __SRTP_STREAM_IN_H__ |
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#define __SRTP_STREAM_IN_H__ |
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// INCLUDES |
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#include <e32def.h> |
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#include "srtpstream.h" |
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#include "msrtpstreamincontext.h" |
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|
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// FORWARD DECLARATIONS |
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class CSRTPSession; |
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class CSRTPCryptoContext; |
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class MSRTPReKeyingObserver; |
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class TSRTPStreamInStateBase; |
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|
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/** |
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* Represents an SRTP stream. |
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*/ |
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class CSRTPStreamIn : public CSRTPStream, |
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public MSRTPStreamInContext |
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{ |
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public: |
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/** |
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* Two-phased constructor. |
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* Use this function if the stream will use the SRTP session's default |
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* cryptographic context. |
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* @param aSession The session containing the cryptographic |
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* context for this object. |
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* @param aSSRC The synchronization source ID of the RTP stream |
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* that corresponds to this object. |
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* @leave KErrNone if success, system-wide error code otherwise |
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*/ |
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IMPORT_C static CSRTPStreamIn* NewL( CSRTPSession& aSession, |
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TUint aSSRC); |
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|
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/** |
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* Two-phased constructor. |
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* Use this function if the stream will have its own cryptographic |
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* context. |
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* @param aSession The session containing the cryptographic |
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* context for this object. |
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* @param aSSRC The synchronization source ID of the RTP stream |
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* that corresponds to this object. |
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* @param aCon The cryptographic context, ownership is transfered. |
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* @param aObs The callback object |
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* @leave KErrNone if success, system-wide error code otherwise |
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*/ |
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IMPORT_C static CSRTPStreamIn* NewL( CSRTPSession& aSession, |
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TUint aSSRC, |
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CSRTPCryptoContext* aCon, |
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MSRTPReKeyingObserver& aObs ); |
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|
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/** |
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* Two-phased constructor. |
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* Use this function if the stream will use the SRTP session's default |
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* cryptographic context and "late binding" is to be used, that is, |
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* no SSRC is provided. |
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* @param aSession The session containing the cryptographic |
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* context for this object. |
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* @leave KErrNone if success, system-wide error code otherwise |
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*/ |
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IMPORT_C static CSRTPStreamIn* NewL( CSRTPSession& aSession); |
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|
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/** |
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* Two-phased constructor. |
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* Use this function if the stream will have its own cryptographic |
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* context and "late binding" is to be used, that is, |
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* no SSRC is provided. |
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* @param aSession The session containing the cryptographic |
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* context for this object. |
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* @param aCon The cryptographic context, ownership is transfered. |
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* @param aObs The callback object |
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* @leave KErrNone if success, system-wide error code otherwise |
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*/ |
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IMPORT_C static CSRTPStreamIn* NewL( CSRTPSession& aSession, |
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CSRTPCryptoContext* aCon, |
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MSRTPReKeyingObserver& aObs ); |
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/** |
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* Two-phased constructor. |
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* Use this function if the stream will have its own cryptographic |
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* context and this cryptographic context will be set later. |
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* Note that if the crypto context is not been set, the encoded packets |
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* will not be handled. |
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* @param aSession The session which includes the streams. |
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* @param aSSRC The synchronization source ID of the RTP stream |
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* that corresponds to this object. |
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* @param aObs The callback object |
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* @leave KErrNone if success, system-wide error code otherwise |
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*/ |
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IMPORT_C static CSRTPStreamIn* NewL( CSRTPSession& aSession, |
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TUint aSSRC, |
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MSRTPReKeyingObserver& aObs ); |
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112 |
|
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/** |
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* Two-phased constructor. |
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* Use this function if the stream will have its own cryptographic |
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* context and "late binding" is to be used, that is, |
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* no SSRC is provided.Stream own cryptocontext will be set later. |
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* Note that if the crypto context is not been set, the encoded packets |
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* will not be handled. |
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* @param aSession The session which includes the streams. |
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* @param aObs The callback object |
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* @leave KErrNone if success, system-wide error code otherwise |
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*/ |
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IMPORT_C static CSRTPStreamIn* NewL( CSRTPSession& aSession, |
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MSRTPReKeyingObserver& aObs ); |
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126 |
|
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/** |
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* Unprotect an SRTP packet. |
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* The settings for the protection are fetched from the appropriate |
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* cryptographic context. If the operation fails, the function leaves |
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* with a system error code. |
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* @param aPacket The SRTP packet to process. |
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* @leave KErrNone if success, system-wide error code otherwise |
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* @return An RTP packet. |
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*/ |
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IMPORT_C HBufC8* UnprotectSrtpL( const TDesC8& aPacket ); |
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137 |
|
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/** |
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* Unprotect an SRTCP packet. |
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* The settings for the protection are fetched from the appropriate |
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* cryptographic context. If the operation fails, the function leaves |
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* with a system error code. |
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* @param aPacket The SRTCP packet to process. |
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* @leave KErrNone if success, system-wide error code otherwise |
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* @return An RTCP packet. |
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*/ |
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IMPORT_C HBufC8* UnprotectSrtcpL( const TDesC8& aPacket ); |
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148 |
|
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/** |
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* Set/Update CryptoContext for InStream |
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* Setting cryptographic context must be done to enable encode/decode packets. |
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* During offer/Answer, offerer do not know which crypto context is |
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* chosen by answerer. CryptoContext then can be set after getting response |
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* from answerer. If crypto context has not been set, no packets in secure |
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* session will be handled. |
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* Updating stream specific crypto Context |
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* Note that to update crypto context, ROC will not be re-intialed to zero but |
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* the states and number of receiving packets will be reset. This can be |
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* use only when keys lifetime has not expired. |
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* Crypto context ownershíp is transfered. |
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* @param aCon aCryyptoContext which wants be used, ownership is transfered. |
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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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IMPORT_C void SetCryptoInL(CSRTPCryptoContext* aCon); |
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166 |
|
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/** |
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* Destructor |
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* Note that crypto context will be deleted if stream has it's own cryptocontext |
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*/ |
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~CSRTPStreamIn( ); |
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|
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/** |
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* Delete the existed crypto context and re-initial the states |
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* @param None |
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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 UpdateCryptoAndStatesL(); |
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180 |
|
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181 |
|
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private: //methods |
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CSRTPStreamIn (CSRTPSession& aSession, |
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TUint aSSRC); |
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185 |
|
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CSRTPStreamIn (CSRTPSession& aSession, |
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TUint aSSRC, |
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CSRTPCryptoContext* aCon, |
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MSRTPReKeyingObserver& aObs ); |
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190 |
|
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CSRTPStreamIn (CSRTPSession& aSession, |
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TUint aSSRC, |
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MSRTPReKeyingObserver& aObs ); |
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194 |
|
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CSRTPStreamIn (CSRTPSession& aSession); |
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|
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CSRTPStreamIn (CSRTPSession& aSession, |
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CSRTPCryptoContext* aCon, |
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MSRTPReKeyingObserver& aObs ); |
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CSRTPStreamIn (CSRTPSession& aSession, |
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MSRTPReKeyingObserver& aObs ); |
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|
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void ConstructL(); |
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|
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/** |
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* Create states defined in TSRTPStreamInStateBase |
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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 InitializeStatesL(); |
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private: |
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TSRTPStreamInStateBase& CurrentRTPState(); |
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TSRTPStreamInStateBase& CurrentRTCPState(); |
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private: //from MSRTPStreamInContext |
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/* |
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* Change state of the current incoming stream (for RTP) |
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* @return void. |
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*/ |
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void ChangeRTPState(MSRTPStreamInContext::TContextInState aNewState); |
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/* |
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* Change state of the current incoming stream (for RTCP) |
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* @return void. |
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*/ |
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void ChangeRTCPState(MSRTPStreamInContext::TContextInState aNewState); |
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protected: |
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/* |
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states for CSRTPStreamIn |
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*/ |
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CArrayVarFlat<TSRTPStreamInStateBase> iStates; |
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/* |
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the same stream can handle RTP and RTCP packets, |
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these can have different states |
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*/ |
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MSRTPStreamInContext::TContextInState iCurrentRTPState; |
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MSRTPStreamInContext::TContextInState iCurrentRTCPState; |
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private: |
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friend class CSRTPSession; |
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#ifdef EUNIT_TESTING |
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friend class UT_CSRTPStreamIn; |
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friend class UT_CSRTPSession; |
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#endif |
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}; |
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#endif // __SRTP_STREAM_IN_H__ |
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