--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/telephonyprotocols/rawipnif/version1/src/IPTagHeader.cpp	Wed Sep 01 12:40:21 2010 +0100
@@ -0,0 +1,101 @@
+// 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:
+// Implements the adding and removal of tag headers.
+// 
+//
+
+/**
+ @file
+*/
+
+#ifdef RAWIP_HEADER_APPENDED_TO_PACKETS
+
+#include "IPTagHeader.h"
+#include "Constants.h"
+
+/**
+Default constructor. 
+*/
+CIPTagHeader::CIPTagHeader(CBttLogger* aTheLogger)
+	: iTheLogger(aTheLogger)
+	{
+	iHeaderByte.SetMax();
+	iHeaderByte.FillZ();
+	}
+
+/**
+Default destructor.
+*/
+CIPTagHeader::~CIPTagHeader()
+	{
+	}
+
+/**
+This method will set the type of the IP header.
+
+@param aType IP header type
+*/
+void CIPTagHeader::SetType(TUint16 aType)
+	{
+	_LOG_L1C1(_L8("CIPTagHeader::SetType"));
+	
+	iHeaderByte[0] = (TUint8)(aType>>8); 
+	iHeaderByte[1] = (TUint8)(aType&0xff);	
+	}
+
+/**
+This method will add a two-byte header to the send buffer detailing the
+protocol the aDes data packet is encoded with; in this case an IPv4
+header tag is appended.
+
+@param aDes the send buffer
+*/
+void CIPTagHeader::AddHeader(TDes8& aDes)
+	{
+	_LOG_L1C1(_L8("CIPTagHeader::AddHeader"));
+
+	// Add the protocol code as a header to the buffer
+	aDes.Insert(0,iHeaderByte);
+	}
+
+/**
+This method will remove the two-byte header from the received data,
+which specifies whether it is an IPv4/IPv6 packet.  This information
+will be stored in protocolCode and returned to the caller.
+
+@param aPdu The received data packet
+@return The protocol header tag stripped from aPdu
+*/
+TUint16 CIPTagHeader::RemoveHeader(RMBufChain& aPdu)
+	{
+	_LOG_L1C1(_L8("CIPTagHeader::RemoveHeader"));
+
+	if (aPdu.Length() > KIPTagHeaderLength)
+		{
+		//Strip off the first part of the header
+		aPdu.TrimStart(1);
+		//Read the remaining part of the header as this contains the protocol code
+		TUint8* payloadPtr = aPdu.First()->Ptr();
+		TUint16 protocolCode = static_cast<TUint16>(*payloadPtr);
+		//Strip off the remaining protocol code part of the header
+
+		aPdu.TrimStart(1);
+
+		return protocolCode;
+		}
+
+	return 0;
+	}
+
+#endif // RAWIP_HEADER_APPENDED_TO_PACKETS