--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtp/srtpstack/inc/tsrtpstreaminstatebase.h	Tue Feb 02 01:03:15 2010 +0200
@@ -0,0 +1,74 @@
+/*
+* Copyright (c) 2005 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:    Base class for incoming SRTP stream states
+*
+*/
+
+
+
+
+#ifndef TSRTPSTREAMINSTATEBASE_H
+#define TSRTPSTREAMINSTATEBASE_H
+
+// INCLUDES
+#include <e32std.h>
+#include "tsrtpstreamstatebase.h"
+
+// FORWARD DECLARATIONS
+class MSRTPStreamInContext;
+class MSRTPCryptoHandlerContext;
+class MSRTPCryptoHandlerContextRTP;
+class MSRTPCryptoHandlerContextRTCP;
+
+// CLASS DECLARATION
+class TSRTPStreamInStateBase : public TSRTPStreamStateBase
+	{
+	protected:	// Constructors and destructor
+
+		TSRTPStreamInStateBase(MSRTPStreamInContext& aStreamContext,
+		    MSRTPCryptoHandlerContextRTP& aCryptoHandlerRTPContext,
+		    MSRTPCryptoHandlerContextRTCP& aCryptoHandlerRTCPContext);
+
+	public: // New methods
+        /**
+        * virtual function for unprotecting encrypted RTP packet.
+        * implemented in substates of TSRTPStreamInStateBase.
+        * @param aPacket encrypted packet
+        * @leave KErrNone if success, system-wide error code otherwise        
+        * @return HBufC8* decrypted packet
+        */                              
+		virtual HBufC8* DoUnprotectSrtpL(const TDesC8& aPacket)=0;
+
+        /**
+        * virtual function for unprotecting encrypted RTCP packet.
+        * implemented in substates of TSRTPStreamInStateBase.
+        * @param aPacket encrypted packet
+        * @leave KErrNone if success, system-wide error code otherwise        
+        * @return HBufC8* decrypted packet
+        */                              
+		virtual HBufC8* DoUnprotectSrtcpL(const TDesC8& aPacket)=0;
+		
+	private: // Constructors
+		/// Default constructor. Not implemented.
+		TSRTPStreamInStateBase();
+
+	protected: // Data
+	    /* 
+	    * interface for a receiver stream for changing state
+	    */
+		MSRTPStreamInContext& iStreamContext;
+		
+	};
+
+#endif // TSRTPStreamInStateBase_H