--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtp/srtpstack/src/tsrtpstreaminstatenormal.cpp	Tue Feb 02 01:03:15 2010 +0200
@@ -0,0 +1,127 @@
+/*
+* 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:    implementation
+*
+*/
+
+
+
+
+#include "tsrtpstreaminstatenormal.h"
+#include "msrtpstreamincontext.h"
+#include "msrtpcryptohandlercontext.h"
+#include "msrtpcryptohandlercontextrtp.h"
+#include "msrtpcryptohandlercontextrtcp.h"
+#include "srtputils.h"
+
+// ----------------------------------------------------------------------------
+// TSRTPStreamInStateNormal::TSRTPStreamInStateNormal
+// ----------------------------------------------------------------------------
+//
+TSRTPStreamInStateNormal::TSRTPStreamInStateNormal(
+    MSRTPStreamInContext& aStreamContext,
+    MSRTPCryptoHandlerContextRTP& aCryptoHandlerRTPContext,
+    MSRTPCryptoHandlerContextRTCP& aCryptoHandlerRTCPContext)
+    : TSRTPStreamInStateBase(aStreamContext,
+                            aCryptoHandlerRTPContext, 
+                            aCryptoHandlerRTCPContext)
+    {
+    }
+
+// ----------------------------------------------------------------------------
+// TSRTPStreamInStateNormal::DoUnprotectSrtpL
+// ----------------------------------------------------------------------------
+//		
+HBufC8* TSRTPStreamInStateNormal::DoUnprotectSrtpL(const TDesC8& aPacket)
+    {
+	SRTP_DEBUG_DETAIL( "TSRTPStreamInStateNormal::DoUnprotectSrtpL ENTRY" );
+   	SRTP_DEBUG_TINT_VALUE( "Encrypted PacketLength is", aPacket.Length() );            
+          
+    // first initialize current encrypted RTP packet..
+    iCryptoHandlerRTPContext.InitializeEncryptedPacketL(aPacket);    
+           
+    // Step 2 (in RFC 3711, section 3.3):
+    // count the packet index i
+    iCryptoHandlerRTPContext.CountReceiverPacketIndexL();
+     
+    // check MKI if it is used
+    iCryptoHandlerRTPContext.CheckMasterKeyIdentifierL();
+     
+    // derive session keys..
+    if (iCryptoHandlerRTPContext.MasterKeysUpdated())
+        {
+        iCryptoHandlerRTPContext.DeriveSessionKeysL();        
+        }
+
+    // do the replay protection 
+    iCryptoHandlerRTPContext.ReplayProtectionL();
+
+    // do the authentication (integrity check)
+    iCryptoHandlerRTPContext.AuthenticateL();
+               
+     // decrypt..
+    HBufC8* decryptedPacket = iCryptoHandlerRTPContext.DecryptL();
+     
+    // Step 7, conditional update s_l and ROC values..
+    // (in RFC 3711, section 3.3):         
+    iCryptoHandlerRTPContext.Update_s_l_and_RocL();
+    iCryptoHandlerRTPContext.AddReplayIndex();
+    ///Should check the next Packet Index and decide if need to be re-key
+    
+    SRTP_DEBUG_TINT_VALUE( "the decrypted packet Length is", decryptedPacket->Length());
+    SRTP_DEBUG_DETAIL( "TSRTPStreamInStateNormal::DoUnprotectSrtpL EXIT" );
+	
+    return decryptedPacket;    
+    
+    }
+
+// ----------------------------------------------------------------------------
+// TSRTPStreamInStateNormal::DoUnprotectSrtcpL
+// ----------------------------------------------------------------------------
+//		
+HBufC8* TSRTPStreamInStateNormal::DoUnprotectSrtcpL(const TDesC8& aPacket)
+    {
+    
+    // first initialize current encrypted RTP packet..
+    iCryptoHandlerRTCPContext.InitializeEncryptedPacketL(aPacket);    
+           
+  //(in RFC 3711, section 3.4):
+    // count the packet index i
+    iCryptoHandlerRTCPContext.ReceiverPacketIndexL();
+     
+    // check MKI if it is used
+    iCryptoHandlerRTCPContext.CheckMasterKeyIdentifierL();
+     
+    // derive session keys..
+    if (iCryptoHandlerRTCPContext.MasterKeysUpdated())
+        {
+        iCryptoHandlerRTCPContext.DeriveSessionKeysL();        
+        }
+
+    // do the replay protection 
+    iCryptoHandlerRTCPContext.ReplayProtectionL();
+
+    // do the authentication (integrity check)
+    iCryptoHandlerRTCPContext.AuthenticateL();
+               
+     // decrypt..
+    HBufC8* decryptedPacket = iCryptoHandlerRTCPContext.DecryptL();
+    iCryptoHandlerRTCPContext.AddReplayIndex();  
+    ///Should check the next Packet Index and decide if need to be re-key
+    //Set updateKey needed and then lateron compared the key if the key is the same then ignore packet
+    //implemented later
+    // return decrypted RTCP packet
+    return decryptedPacket;    
+    
+    }