--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/realtimenetprots/sipfw/SIP/ConnectionMgr/src/TTCPMsgHeaderStart.cpp	Tue Feb 02 01:03:15 2010 +0200
@@ -0,0 +1,75 @@
+// Copyright (c) 2004-2009 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:
+// Name        : TTCPMsgHeaderStart.cpp
+// Part of     : ConnectionMgr
+// Implementation
+// Version     : SIP/4.0
+//
+
+
+
+#include "TTCPMsgHeaderStart.h"
+#include "MMsgAssemblerContext.h"
+
+// ----------------------------------------------------------------------------
+// TTCPMsgHeaderStart::DataReceivedL
+// ----------------------------------------------------------------------------
+//
+void TTCPMsgHeaderStart::DataReceivedL( TPtr8 aData, TUint&  aNextLength )
+	{
+	// if there are existing data in msg buffer
+	if ( iMsgAssembler.MsgBuffer().Size() > 0 )
+		{	
+		// insert the received data to msg buffer.
+		iMsgAssembler.MsgBuffer().InsertL(
+							iMsgAssembler.MsgBuffer().Size(), aData );
+		iMsgAssembler.MsgBuffer().Compress();	
+		// delete content of received data.
+		aData.Delete( 0, aData.Length() );
+		TPtr8 bufPtr = iMsgAssembler.MsgBuffer().Ptr( 0 );
+		
+		// check if header end mark can be found from msg buffer,
+		// if so, allocate new data from msg buffer, and clear msg buffer
+		// enter to Msg header end state. 
+		if (FindHeaderEndPosition( bufPtr ) >= 0)
+			{
+			HBufC8* newData = HBufC8::NewLC( bufPtr.Length() );
+		    // copy the msg buffer data to new data 
+	    	TPtr8 newDataPtr = newData->Des();
+	    	newDataPtr.Append( bufPtr );
+	    	// clean the msg buffer
+			iMsgAssembler.MsgBuffer().Reset();
+			iMsgAssembler.MsgBuffer().Compress();
+	    				
+	    	iMsgAssembler.ChangeState( MMsgAssemblerContext::EMsgHeaderEnd );
+			iMsgAssembler.CurrentState().DataReceivedL( newDataPtr, 
+												        aNextLength );
+	    	CleanupStack::PopAndDestroy(newData);
+			}	
+		}
+	else if ( FindHeaderEndPosition( aData ) >= 0 )
+		{
+		iMsgAssembler.ChangeState( MMsgAssemblerContext::EMsgHeaderEnd );
+		iMsgAssembler.CurrentState().DataReceivedL( aData, aNextLength );
+		}
+	// if the header end mark is not found, it means the received data 
+	// contains only part of SIP message header, copy the received data to 
+	// a buffer and wait for next part of message header
+	else 
+		{
+		iMsgAssembler.MsgBuffer().InsertL(
+									iMsgAssembler.MsgBuffer().Size(), aData );
+		iMsgAssembler.MsgBuffer().Compress();
+		}
+	}