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// Copyright (c) 2004-2009 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:
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// Implements the adding and removal of tag headers.
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//
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//
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/**
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@file
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*/
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#ifdef RAWIP_HEADER_APPENDED_TO_PACKETS
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#include "IPTagHeader.h"
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#include "Constants.h"
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/**
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Default constructor.
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*/
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CIPTagHeader::CIPTagHeader(CBttLogger* aTheLogger)
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: iTheLogger(aTheLogger)
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{
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iHeaderByte.SetMax();
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iHeaderByte.FillZ();
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}
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/**
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Default destructor.
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*/
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CIPTagHeader::~CIPTagHeader()
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{
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}
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/**
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This method will set the type of the IP header.
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@param aType IP header type
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*/
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void CIPTagHeader::SetType(TUint16 aType)
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{
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_LOG_L1C1(_L8("CIPTagHeader::SetType"));
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iHeaderByte[0] = (TUint8)(aType>>8);
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iHeaderByte[1] = (TUint8)(aType&0xff);
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}
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/**
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This method will add a two-byte header to the send buffer detailing the
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protocol the aDes data packet is encoded with; in this case an IPv4
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header tag is appended.
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@param aDes the send buffer
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*/
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void CIPTagHeader::AddHeader(TDes8& aDes)
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{
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_LOG_L1C1(_L8("CIPTagHeader::AddHeader"));
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// Add the protocol code as a header to the buffer
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aDes.Insert(0,iHeaderByte);
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}
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/**
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This method will remove the two-byte header from the received data,
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which specifies whether it is an IPv4/IPv6 packet. This information
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will be stored in protocolCode and returned to the caller.
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@param aPdu The received data packet
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@return The protocol header tag stripped from aPdu
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*/
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TUint16 CIPTagHeader::RemoveHeader(RMBufChain& aPdu)
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{
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_LOG_L1C1(_L8("CIPTagHeader::RemoveHeader"));
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if (aPdu.Length() > KIPTagHeaderLength)
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{
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//Strip off the first part of the header
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aPdu.TrimStart(1);
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//Read the remaining part of the header as this contains the protocol code
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TUint8* payloadPtr = aPdu.First()->Ptr();
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TUint16 protocolCode = static_cast<TUint16>(*payloadPtr);
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//Strip off the remaining protocol code part of the header
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aPdu.TrimStart(1);
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return protocolCode;
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}
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return 0;
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}
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#endif // RAWIP_HEADER_APPENDED_TO_PACKETS
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