realtimenetprots/sipfw/SDP/src/SdpMediaField.cpp
author Petteri Saari <petteri.saari@digia.com>
Thu, 25 Nov 2010 13:59:42 +0200
branchMSRP_FrameWork
changeset 58 cdb720e67852
parent 0 307788aac0a8
permissions -rw-r--r--
This release addresses the following issues: 1. The crash bug fix when receiving file 2. Now the sending is based on MSRP messages, there is no longer file receiving or sending. Client sends data as MSRP was designed. 3. Soma MSRP stack was created so that the client told the correct session-id, Symbian stack generated it by itself. This is not allowed, it was changed so that clients tell the session-id (same as used in SIP INVITE). 4. Unnecessary division of data to chunks removed when there is no need to interrupt sending. The message is sent in as few chunks as possible. 5. Stack can now receive files and chunks with ?unlimited? size. Old stack wrote the incoming data to memory and did not utilize disk space until the end of chunk was reached (large chunks from another client crashed it). 6. Now when writing the incoming data to file, it will take into account the byte-range header values. So, this complies with the RFC4975 requirements that stack must be able to handle chunks that come in any sequence. 7. Some buffering changes to outgoing/incoming data. 8. The outgoing data is now checked that it does not contain the created transaction-id before sending the data. 9. MSRP success reports are now implemented and tested against servers. 10. Progress report system fixed so progress is now visible on client (all the way to 100%). 11. Message Cancel receiving / Cancel sending now corrected and made to work as rfc4975 requires. (termination from sender and error code from receiver when cancelling). 12. Bug correction related to messages received not belonging to any session, old stack implementation did send error response, but after response was written it did give the buffer to client anyway. Now corrected.

// Copyright (c) 2003-2009 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          : SdpMediaField.cpp
// Part of       : SDP Codec
// Version       : 1.0
//



#include <s32mem.h>
#include <s32strm.h>
#include "SdpMediaField.h"
#include "SdpConnectionField.h"
#include "SdpBandwidthField.h"
#include "SdpAttributeField.h"
#include "SdpKeyField.h"
#include "sdpcodecstringconstants.h"
#include "SdpUtil.h"
#include "SDPCodec.pan"
#include "_sdpdefs.h"
#include "SdpCodecStringPool.h"
#include "SdpFmtAttributeField.h"
#include "SdpCodecTemplate.h"
#include "SdpCodecErr.h"
#include "SdpCodecParseUtil.h"
#include "SdpCodecConstants.h"

// ----------------------------------------------------------------------------
// CSdpMediaField::DecodeL
// ----------------------------------------------------------------------------
//
EXPORT_C CSdpMediaField* 
CSdpMediaField::DecodeL(const TDesC8& aText, TBool aRecurse)
	{
	CSdpMediaField* obj = DecodeLC(aText,aRecurse);
	CleanupStack::Pop();
	return obj;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::DecodeLC
// ----------------------------------------------------------------------------
//
EXPORT_C CSdpMediaField* 
CSdpMediaField::DecodeLC(const TDesC8& aText, TBool aRecurse)
	{
	__ASSERT_ALWAYS (aText.Length() > 0, User::Leave(KErrSdpCodecMediaField));
	CSdpMediaField* obj = new(ELeave)CSdpMediaField;
	CleanupStack::PushL(obj);
	obj->ConstructL(aRecurse);
	obj->ParseL(aText);
	return obj;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::NewL
// ----------------------------------------------------------------------------
//
EXPORT_C CSdpMediaField* CSdpMediaField::NewL(RStringF aMedia,
											TUint aPort,
											RStringF aProtocol,
											const TDesC8& aFormatList)
	{
	CSdpMediaField* obj = NewLC(aMedia, aPort, aProtocol, aFormatList);
	CleanupStack::Pop();
	return obj;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::NewLC
// ----------------------------------------------------------------------------
//
EXPORT_C CSdpMediaField* CSdpMediaField::NewLC(RStringF aMedia,
											TUint aPort,
											RStringF aProtocol,
											const TDesC8& aFormatList)
	{
	CSdpMediaField* obj = new(ELeave)CSdpMediaField;
	CleanupStack::PushL(obj);
	obj->ConstructL(aMedia, aPort, aProtocol, aFormatList);
	return obj;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::~CSdpMediaField
// ----------------------------------------------------------------------------
//
EXPORT_C CSdpMediaField::~CSdpMediaField()
	{
	delete iInfo;
	delete iSdpKeyField;
	iElementArray.Reset();
	iMedia.Close();
	iProtocol.Close();
	delete iFormatList;
	delete iToken;
	if(iBandwidthFields)
		{
		iBandwidthFields->ResetAndDestroy();
		delete iBandwidthFields;
		}
	if(iAttributeFields)
		{
		iAttributeFields->ResetAndDestroy();
		delete iAttributeFields;
		}
	if(iConnectionFields)
		{
		iConnectionFields->ResetAndDestroy();
		delete iConnectionFields;
		}
	if(iFmtAttrFields)
		{
		iFmtAttrFields->ResetAndDestroy();
		delete iFmtAttrFields;
		}
	delete iSdpCodecParseUtil;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::CloneL
// ----------------------------------------------------------------------------
//
EXPORT_C CSdpMediaField * CSdpMediaField::CloneL(TBool aRecurse) const
	{
	CSdpMediaField* obj = new(ELeave)CSdpMediaField;
	CleanupStack::PushL(obj);
	obj->ConstructL(aRecurse);
	obj->ConstructL(*this);
	CleanupStack::Pop();//obj
	return obj;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::operator ==
// ----------------------------------------------------------------------------
//
EXPORT_C TBool CSdpMediaField::operator == (const CSdpMediaField& aObj) const
	{
	TBool result = ETrue;
	if(	!(iMedia==aObj.Media()) ||
		!(iPort == aObj.Port()) ||
		!(iPortCount == aObj.iPortCount) ||
		!(iProtocol == aObj.Protocol()) ||
		!(*iFormatList==(*aObj.iFormatList)) ||
		(!(*iInfo==(*aObj.iInfo)))||
		(!iSdpKeyField && aObj.Key())||
		(iSdpKeyField && !aObj.Key())||
		((iSdpKeyField && aObj.Key()) && (!(*iSdpKeyField==(*aObj.Key()))))||
		(iBandwidthFields->Count() != aObj.iBandwidthFields->Count())||
		(iAttributeFields->Count() != aObj.iAttributeFields->Count())||
		(iFmtAttrFields->Count() != aObj.iFmtAttrFields->Count())||
		(iConnectionFields->Count() != aObj.iConnectionFields->Count()))
		{
		result = EFalse;
		}

	TInt i  = 0;
	if(result)
		{
		for (i=0; i < (aObj.iConnectionFields)->Count(); i++)
			{
			if((!(*iConnectionFields)[i] && (*aObj.iConnectionFields)[i]) ||
				((*iConnectionFields)[i] && !(*aObj.iConnectionFields)[i]))
				{
				return EFalse;
				}

			if(((*iConnectionFields)[i] && (*aObj.iConnectionFields)[i]) &&
				(!(*(*iConnectionFields)[i]==(*(*aObj.iConnectionFields)[i]))))
				{	
				return EFalse;
				}
			}

		for (i=0; i < (aObj.iBandwidthFields)->Count(); i++)
			{
			if((!(*iBandwidthFields)[i] && (*aObj.iBandwidthFields)[i]) ||
				((*iBandwidthFields)[i] && !(*aObj.iBandwidthFields)[i]))
				{
				return EFalse;
				}

			if(((*iBandwidthFields)[i] && (*aObj.iBandwidthFields)[i]) &&
				(!(*(*iBandwidthFields)[i]==(*(*aObj.iBandwidthFields)[i]))))
				{	
				return EFalse;
				}
			}

		for (i=0; i < (aObj.iAttributeFields)->Count(); i++)
			{
			if((!((*iAttributeFields)[i]) && ((*aObj.iAttributeFields)[i]))||
				((*iAttributeFields)[i] && !(*aObj.iAttributeFields)[i]))
				{
				return EFalse;
				}
	
			if(((*iAttributeFields)[i] && (*aObj.iAttributeFields)[i]) &&
				(!(*(*iAttributeFields)[i]==(*(*aObj.iAttributeFields)[i]))))
				{
				return EFalse;
				}
			}

		for (i=0; i < (aObj.iFmtAttrFields)->Count(); i++)
			{
			if((!((*iFmtAttrFields)[i]) && ((*aObj.iFmtAttrFields)[i]))||
				((*iFmtAttrFields)[i] && !(*aObj.iFmtAttrFields)[i]))
				{
				return EFalse;
				}
	
			if(((*iFmtAttrFields)[i] && (*aObj.iFmtAttrFields)[i]) &&
				(!(*(*iFmtAttrFields)[i]==(*(*aObj.iFmtAttrFields)[i]))))
				{
				return EFalse;
				}
			}
		}
	return result;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::Media
// ----------------------------------------------------------------------------
//
EXPORT_C RStringF CSdpMediaField::Media() const
	{
	return iMedia;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::SetMedia
// ----------------------------------------------------------------------------
//
EXPORT_C void CSdpMediaField::SetMediaL(RStringF aMedia)
	{
	__ASSERT_ALWAYS(SdpUtil::IsTokenChar(aMedia.DesC()), 
					User::Leave(KErrSdpCodecMediaField));
	iMedia.Close();
	iMedia = aMedia.Copy();
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::Protocol
// ----------------------------------------------------------------------------
//
EXPORT_C RStringF CSdpMediaField::Protocol() const
	{
	return iProtocol;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::SetProtocol
// ----------------------------------------------------------------------------
//
EXPORT_C void CSdpMediaField::SetProtocolL(RStringF aProtocol)
	{
	__ASSERT_ALWAYS(SdpUtil::IsTokenCharWithOptionalSlash(aProtocol.DesC()),
					User::Leave(KErrSdpCodecMediaField));
    if (aProtocol == iPool.StringF( SdpCodecStringConstants::EProtocolUdp, 
                            SdpCodecStringConstants::Table ))
        {
	    __ASSERT_ALWAYS((iPort == 0 || (iPort >= 1024 && iPort <= 65535)),
					User::Leave(KErrSdpCodecMediaField));
        }

	iProtocol.Close();
	iProtocol = aProtocol.Copy();    
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::Port
// ----------------------------------------------------------------------------
//
EXPORT_C TUint CSdpMediaField::Port() const
	{
	return iPort;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::SetPortL
// ----------------------------------------------------------------------------
//
EXPORT_C void CSdpMediaField::SetPortL(TUint aPort)
	{
    if ( iProtocol == iPool.StringF( SdpCodecStringConstants::EProtocolUdp, 
                            SdpCodecStringConstants::Table ))
        {
	    __ASSERT_ALWAYS((aPort == 0 || (aPort >= 1024 && aPort <= 65535)),
					User::Leave(KErrSdpCodecMediaField));
        }
	iPort = aPort;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::PortCount
// ----------------------------------------------------------------------------
//
EXPORT_C TUint CSdpMediaField::PortCount() const
	{
	return iPortCount;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::SetPortCount
// ----------------------------------------------------------------------------
//
EXPORT_C void CSdpMediaField::SetPortCountL(TUint aCount)
	{
	__ASSERT_ALWAYS(aCount > 0, User::Leave(KErrSdpCodecMediaField));
	iPortCount = aCount;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::FormatList
// ----------------------------------------------------------------------------
//
EXPORT_C const TDesC8& CSdpMediaField::FormatList() const
	{
	return *iFormatList;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::SetFormatListL
// ----------------------------------------------------------------------------
//
EXPORT_C void CSdpMediaField::SetFormatListL(const TDesC8& aValue)
	{
	__ASSERT_ALWAYS(SdpUtil::IsTokenCharWithSpacesL(aValue), 
										User::Leave(KErrSdpCodecMediaField));
	HBufC8* tmp = aValue.AllocL();
	delete iFormatList;
	iFormatList = tmp;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::CSdpMediaField
// ----------------------------------------------------------------------------
//
CSdpMediaField::CSdpMediaField()
	{
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::ConstructL
// ----------------------------------------------------------------------------
//
void CSdpMediaField::ConstructL()
	{
	iPool = SdpCodecStringPool::StringPoolL();
	iInfo = KNullDesC8().AllocL();
	iFormatList = KNullDesC8().AllocL();
	iToken = KNullDesC8().AllocL();
	iBandwidthFields = new(ELeave)RPointerArray<CSdpBandwidthField>;
	iConnectionFields = new(ELeave)RPointerArray<CSdpConnectionField>;
	iAttributeFields = new(ELeave)RPointerArray<CSdpAttributeField>;
	iFmtAttrFields = new(ELeave)RPointerArray<CSdpFmtAttributeField>;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::ConstructL
// ----------------------------------------------------------------------------
//
void CSdpMediaField::ConstructL(TBool aRecurse)
	{
	ConstructL();
	iRecurse = aRecurse;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::ConstructL
// ----------------------------------------------------------------------------
//
void 
CSdpMediaField::ConstructL(RStringF aMedia, TUint aPort, RStringF aProtocol,
						const TDesC8& aFormatList)
	{
	__ASSERT_ALWAYS(SdpUtil::IsTokenChar(aMedia.DesC()) &&
					(aPort== 0 || (aPort >= 1024 && aPort <= 65535)) &&
					SdpUtil::IsTokenCharWithOptionalSlash(aProtocol.DesC()) &&
					SdpUtil::IsTokenCharWithSpacesL(aFormatList), 
					User::Leave(KErrArgument));
	ConstructL();
	iMedia = aMedia.Copy();
	iProtocol = aProtocol.Copy(); 
	SetPortL(aPort);
	delete iFormatList;
	iFormatList = 0;
	iFormatList = aFormatList.AllocL();	
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::ConstructL
// ----------------------------------------------------------------------------
//
void CSdpMediaField::ConstructL(const CSdpMediaField& aSdpMediaField)
	{
	iMedia = aSdpMediaField.Media().Copy();
	iProtocol = aSdpMediaField.Protocol().Copy();
    SetPortL(aSdpMediaField.Port());
	iPortCount = aSdpMediaField.PortCount();
	HBufC8* tmp = aSdpMediaField.FormatList().AllocL();
	delete iFormatList;
	iFormatList = 0;
	iFormatList = tmp;
	if(iRecurse)
		{
		tmp = aSdpMediaField.Info().AllocL();
		delete iInfo;
		iInfo = tmp;
		SdpCodecTemplate<CSdpConnectionField>::CloneArrayL(*iConnectionFields,
			*aSdpMediaField.iConnectionFields);
		SdpCodecTemplate<CSdpBandwidthField>::CloneArrayL(*iBandwidthFields,
			*aSdpMediaField.iBandwidthFields);
		if(aSdpMediaField.Key())
			{
			iSdpKeyField = aSdpMediaField.Key()->CloneL();
			}
		SdpCodecTemplate<CSdpAttributeField>::CloneArrayL(*iAttributeFields,
			*aSdpMediaField.iAttributeFields);
		SdpCodecTemplate<CSdpFmtAttributeField>::CloneArrayL(*iFmtAttrFields,
			*aSdpMediaField.iFmtAttrFields);		
		}
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::Info
// ----------------------------------------------------------------------------
//
EXPORT_C const TDesC8& CSdpMediaField::Info() const
	{
	return *iInfo;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::SetInfoL
// ----------------------------------------------------------------------------
//
EXPORT_C void CSdpMediaField::SetInfoL(const TDesC8& aValue)
	{
	__ASSERT_ALWAYS (aValue.Compare(KNullDesC8) == 0||
					SdpUtil::IsByteString(aValue),
					User::Leave(KErrSdpCodecMediaInfoField));
	HBufC8* tmp = aValue.AllocL();
	tmp->Des().Trim();
	delete iInfo;
	iInfo = tmp;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::Key
// ----------------------------------------------------------------------------
//
EXPORT_C CSdpKeyField* CSdpMediaField::Key()
	{
	return iSdpKeyField;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::Key
// ----------------------------------------------------------------------------
//
EXPORT_C const CSdpKeyField* CSdpMediaField::Key() const
	{
	return iSdpKeyField;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::SetKey
// ----------------------------------------------------------------------------
//
EXPORT_C void CSdpMediaField::SetKey(CSdpKeyField* aObj)
	{
	delete iSdpKeyField;
	iSdpKeyField = aObj;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::ConnectionFields
// ----------------------------------------------------------------------------
//
EXPORT_C RPointerArray<CSdpConnectionField>& CSdpMediaField::ConnectionFields()
	{
	return *iConnectionFields;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::BandwidthFields
// ----------------------------------------------------------------------------
//
EXPORT_C RPointerArray<CSdpBandwidthField>& CSdpMediaField::BandwidthFields()
	{
	return *iBandwidthFields;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::AttributeFields
// ----------------------------------------------------------------------------
//
EXPORT_C RPointerArray<CSdpAttributeField>& CSdpMediaField::AttributeFields()
	{
	return *iAttributeFields;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::FormatAttributeFields()
// ----------------------------------------------------------------------------
//
EXPORT_C RPointerArray<CSdpFmtAttributeField>& 
CSdpMediaField::FormatAttributeFields()
	{
	return *iFmtAttrFields;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::EncodeL
// ----------------------------------------------------------------------------
//
EXPORT_C void 
CSdpMediaField::EncodeL(RWriteStream& aStream, TBool aRecurse) const
	{
	RStringF headername = iPool.StringF( SdpCodecStringConstants::EMedia, 
                                               SdpCodecStringConstants::Table );
    aStream.WriteL(headername.DesC());
	aStream.WriteL(iMedia.DesC());
	aStream.WriteL(KSPStr);
	TBuf8<80> text;
	text.Format(_L8("%u"), iPort);
	aStream.WriteL(text);
	if(iPortCount>0)
		{
		aStream.WriteL(_L8("/"));
		text.Format(_L8("%u"), iPortCount);
	    aStream.WriteL(text);
		}
	aStream.WriteL(KSPStr);
	aStream.WriteL(iProtocol.DesC());
	aStream.WriteL(KSPStr);
	aStream.WriteL(*iFormatList);
	aStream.WriteL(KCRLFStr);	
	if(aRecurse)
		{
		SdpUtil::EncodeBufferL(*iInfo, 
						SdpCodecStringConstants::EInfo, aStream);
		SdpCodecTemplate<CSdpConnectionField>::EncodeArrayL(*iConnectionFields,
															aStream);
		SdpCodecTemplate<CSdpBandwidthField>::EncodeArrayL(*iBandwidthFields,
															aStream);
		SdpCodecTemplate<CSdpKeyField>::EncodeL(Key(), aStream);

		for (TInt i = 0;i < iAttributeFields->Count();i++)
			{
			if (!(((*iAttributeFields)[i])->IsFmtAttribute()))
				{
				((*iAttributeFields)[i])->EncodeL(aStream);
				}
			}

		for (TInt i = 0;i < iFmtAttrFields->Count();i++)
			{
			((*iFmtAttrFields)[i])->EncodeL(aStream);
			
			for (TInt j=0; j<iAttributeFields->Count(); j++)
				{
				if ((((*iAttributeFields)[j])->IsFmtAttribute()) &&
					((*iAttributeFields)[j])->BelongsTo(*(*iFmtAttrFields)[i]))
					{
					((*iAttributeFields)[j])->EncodeL(aStream);
					}
				}
			}
		}
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::IsValid
// ----------------------------------------------------------------------------
//
EXPORT_C TBool CSdpMediaField::IsValid() const
	{
	TBool result = EFalse;
	if(!(iMedia.DesC()==(KNullDesC8)) &&
		!(iProtocol.DesC()==(KNullDesC8))&&
		!(*iFormatList==(KNullDesC8)))
		{
		result = ETrue;
		}
	return result;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::IsContactPresent
// ----------------------------------------------------------------------------
//
TBool CSdpMediaField::IsContactPresent() const
	{
	TBool result = EFalse;
	if(iConnectionFields->Count() > 0)
		{
		result = ETrue;
		}
	return result;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::ExternalizeL
// ----------------------------------------------------------------------------
//
void CSdpMediaField::ExternalizeL(RWriteStream& aStream) const
	{
	aStream.WriteUint32L (iMedia.DesC().Length());
	if (iMedia.DesC().Length() > 0)
		{
		aStream.WriteL (iMedia.DesC());
		}
	aStream.WriteUint32L (iPort);
	if(iPortCount)
		{
		aStream.WriteUint8L (1);
		aStream.WriteUint32L (iPortCount);
		}
	else
		{
		aStream.WriteUint8L (0);
		}
	aStream.WriteUint32L (iProtocol.DesC().Length());
	if (iProtocol.DesC().Length() > 0)
		{
		aStream.WriteL (iProtocol.DesC());
		}
	aStream.WriteUint32L (iFormatList->Length());
	if (iFormatList->Length() > 0)
		{
		aStream.WriteL (*iFormatList);
		}
	aStream.WriteUint32L (iInfo->Length());
	if (iInfo->Length() > 0)
		{
		aStream.WriteL (*iInfo);
		}
	SdpCodecTemplate<CSdpConnectionField>::ExternalizeArrayL(*iConnectionFields,
															aStream);
	SdpCodecTemplate<CSdpBandwidthField>::ExternalizeArrayL(*iBandwidthFields,
															aStream);
	SdpCodecTemplate<CSdpKeyField>::ExternalizeL(Key(), aStream);
	SdpCodecTemplate<CSdpAttributeField>::ExternalizeArrayL(*iAttributeFields,
															aStream);
	SdpCodecTemplate<CSdpFmtAttributeField>::ExternalizeArrayL(*iFmtAttrFields,
																aStream);
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::InternalizeL
// ----------------------------------------------------------------------------
//
CSdpMediaField* CSdpMediaField::InternalizeL(RReadStream& aStream)
	{
	CSdpMediaField* obj = new(ELeave)CSdpMediaField();
	CleanupStack::PushL(obj);
	obj->ConstructL();
	obj->DoInternalizeL (aStream);
	CleanupStack::Pop();
	return obj;
	}

// ----------------------------------------------------------------------------
// CSdpMediaField::DoInternalizeL
// ----------------------------------------------------------------------------
//
void CSdpMediaField::DoInternalizeL(RReadStream& aStream)
	{
	RStringF media = iPool.OpenFStringL(GetTokenFromStreamL(aStream));
	CleanupClosePushL(media);
	SetMediaL(media);
	CleanupStack::Pop();//media
	media.Close();
    TUint32 port = aStream.ReadUint32L();
	//SetPortL(aStream.ReadUint32L());
	TUint flag = aStream.ReadUint8L();
	if(flag)
		{
		SetPortCountL(aStream.ReadUint32L());
		}
	RStringF protocol =iPool.OpenFStringL(GetTokenFromStreamL(aStream));
	CleanupClosePushL(protocol);
	SetProtocolL(protocol);
	CleanupStack::Pop();//protocol
	protocol.Close();
    SetPortL(port);
	SetFormatListL(GetTokenFromStreamL(aStream));	
	SetInfoL(GetTokenFromStreamL(aStream));
	SdpCodecTemplate<CSdpConnectionField>::InternalizeArrayL(*iConnectionFields,
															aStream);
	SdpCodecTemplate<CSdpBandwidthField>::InternalizeArrayL(*iBandwidthFields,
															aStream);
	if(aStream.ReadUint8L())
		{
		SetKey(CSdpKeyField::InternalizeL(aStream));
		}
	SdpCodecTemplate<CSdpAttributeField>::InternalizeArrayL(*iAttributeFields,
													aStream);
	SdpCodecTemplate<CSdpFmtAttributeField>::InternalizeArrayL(*iFmtAttrFields,
													aStream);
	}

// ---------------------------------------------------------------------------
// CSdpMediaField::ParseL
// ---------------------------------------------------------------------------
//
void CSdpMediaField::ParseL (const TDesC8& aText)
	{
	iElementArray.Reset();
	iSdpCodecParseUtil = 
			CSdpCodecParseUtil::NewL(iPool,aText, KErrSdpCodecMediaField);
	ParseMediaL();
	if(iRecurse)
		{
		ParseAttributeFieldsL();
		ParseInformationL();
		ParseConnectionL();
		ParseBandwithL();
		ParseEncryptionKeyL();
		}
	}

// ---------------------------------------------------------------------------
// CSdpMediaField::ParseMediaL
// ---------------------------------------------------------------------------
//
void CSdpMediaField::ParseMediaL()
	{
	iElementArray = iSdpCodecParseUtil->FirstLineArrayElementL(iPool,
												SdpCodecStringConstants::EMedia,
												KErrSdpCodecMediaField);
	__ASSERT_ALWAYS (iElementArray.Count() >= 4,
					User::Leave(KErrSdpCodecMediaField));

	RStringF media = iPool.OpenFStringL(iElementArray[1]);
	CleanupClosePushL(media);
	SetMediaL(media);
	CleanupStack::Pop();//media
	media.Close();

	iProtocol = iPool.OpenFStringL(iElementArray[3]);

    TInt lineEndPosition = iElementArray[2].Locate('/');
	TUint port;
	if(lineEndPosition == KErrNotFound)
		{
		User::LeaveIfError(
		TLex8(iElementArray[2]).Val(port, EDecimal));
		SetPortL(port);
		}
	else
		{
		User::LeaveIfError(TLex8(
				(iElementArray[2]).Left(lineEndPosition)).Val(port, EDecimal));
		SetPortL(port);
		User::LeaveIfError(TLex8(
			  (iElementArray[2]).Mid(lineEndPosition +1)).Val(port, EDecimal));
		SetPortCountL(port);
		}
	__ASSERT_ALWAYS(SdpUtil::IsTokenCharWithOptionalSlash(iElementArray[3]),
					User::Leave(KErrArgument));
	
    //iProtocol = iPool.OpenFStringL(iElementArray[3]);

	TInt length = 0;
	TInt i;
	for(i=4;i<iElementArray.Count();i++)
		{
		length += iElementArray[i].Length();
		if(i + 1 <iElementArray.Count())
			{
			length += KSPStr().Length();
			}
		}
	HBufC8* value = HBufC8::NewLC(length);
	TPtr8 ptr(value->Des());
	for(i=4;i<iElementArray.Count();i++)
		{
		ptr.Append(iElementArray[i]);
		if(i + 1 <iElementArray.Count())
			{
			ptr.Append(KSPStr);
			}
		}
	SetFormatListL(*value);
	CleanupStack::Pop();//value
	delete value;
	iElementArray.Reset();
	if (iSdpCodecParseUtil->LineArray().Count() > 0)
	    {
	    iSdpCodecParseUtil->LineArray().Remove(0);
	    }
	}

// ---------------------------------------------------------------------------
// CSdpMediaField::ParseInformationL
// ---------------------------------------------------------------------------
//
void CSdpMediaField::ParseInformationL()
	{
	SetInfoL(iSdpCodecParseUtil->ParseInformationL(KErrSdpCodecMediaInfoField));
	}

// ---------------------------------------------------------------------------
// CSdpMediaField::ParseConnectionL
// ---------------------------------------------------------------------------
//
void CSdpMediaField::ParseConnectionL()
	{
	delete iConnectionFields;
	iConnectionFields = 0;
	iConnectionFields = iSdpCodecParseUtil->ParseConnectionFieldsL(
										KErrSdpCodecMediaConnectionField);
	}

// ---------------------------------------------------------------------------
// CSdpMediaField::ParseBandwithL
// ---------------------------------------------------------------------------
//
void CSdpMediaField::ParseBandwithL()
	{
	delete iBandwidthFields;
	iBandwidthFields = 0;
	iBandwidthFields = 
		iSdpCodecParseUtil->ParseBandwidthL(KErrSdpCodecMediaBandwidthField);
	}

// ---------------------------------------------------------------------------
// CSdpMediaField::ParseEncryptionKeyL
// ---------------------------------------------------------------------------
//
void CSdpMediaField::ParseEncryptionKeyL()
	{
	SetKey(iSdpCodecParseUtil->ParseEncryptionKeyL(KErrSdpCodecMediaKeyField));
	}

// ---------------------------------------------------------------------------
// CSdpMediaField::ParseAttributeFieldsL
// ---------------------------------------------------------------------------
//
void CSdpMediaField::ParseAttributeFieldsL()
	{
	CSdpFmtAttributeField* fmtattributefield = 0;

    RArray<TPtrC8>& lineArray = iSdpCodecParseUtil->LineArray();
	for (TInt i=0; i<lineArray.Count(); i++)
		{
		iElementArray = CSdpCodecParseUtil::CheckOptionalFieldNameL(iPool,
								SdpCodecStringConstants::EAttribute,
								lineArray[i],
								KErrSdpCodecMediaAttributeField);
		if (iElementArray.Count())
			{
			CSdpAttributeField* attributefield = 
	            CSdpAttributeField::DecodeLC(lineArray[i]);		
		    
            if ( attributefield->Attribute() == 
                 iPool.StringF( SdpCodecStringConstants::EAttributeRtpmap,
                                SdpCodecStringConstants::Table ) ||
                 attributefield->Attribute() ==
                 iPool.StringF( SdpCodecStringConstants::EAttributeFmtp,
                                SdpCodecStringConstants::Table ) )
                {
                CleanupStack::PopAndDestroy(attributefield);
                fmtattributefield = 
                    CSdpFmtAttributeField::DecodeLC(lineArray[i]);
				iFmtAttrFields->AppendL(fmtattributefield);
				CleanupStack::Pop(fmtattributefield);
                }
            else
                {
                iAttributeFields->AppendL(attributefield);
			    CleanupStack::Pop(attributefield);
			    if (fmtattributefield)
			    	{
			    	attributefield->AssignTo(*fmtattributefield);
			    	}
                }
                   
			iElementArray.Reset();
			lineArray.Remove(i);
			if (i < lineArray.Count())
			    {
			    i--;
			    }
			}
		}
	}

// ---------------------------------------------------------------------------
// CSdpMediaField::GetTokenFromStreamL
// ---------------------------------------------------------------------------
//
TDesC8& CSdpMediaField::GetTokenFromStreamL(RReadStream& aStream)
	{
	TUint32 tokenLength = aStream.ReadUint32L();
	HBufC8* tmp = 0;
	if (tokenLength > 0)
		{
		tmp = HBufC8::NewLC(tokenLength);
		TPtr8 tokenptr(tmp->Des());
		aStream.ReadL (tokenptr, tokenLength);
		CleanupStack::Pop();//tmp
		}
	else
		{
		tmp = KNullDesC8().AllocL();
		}
	delete iToken;
	iToken = tmp;
	return *iToken;
	}

// ---------------------------------------------------------------------------
// CSdpMediaField::RemoveFormatL
// ---------------------------------------------------------------------------
//
EXPORT_C void CSdpMediaField::RemoveFormatL(const TDesC8& aFormat)
    {
    if ( !iFormatList || iFormatList->Des().Length() == 0 )
        {
        User::Leave( KErrSdpCodecMediaField );
        }
    TLex8 lexer( *iFormatList );
    TBool tokenRemoved( EFalse );
    while ( !tokenRemoved && !lexer.Eos() )
        {
        lexer.SkipSpaceAndMark();
        lexer.SkipCharacters();
        if ( lexer.TokenLength() > 0 )
            {
             if ( aFormat.CompareF(lexer.MarkedToken()) == 0)
                {                    
                RArray<TInt> removedObjs;           
                CleanupClosePushL( removedObjs );
                for ( TInt i( 0 ); i < iFmtAttrFields->Count(); i++ )
                    {
					if (aFormat.CompareF((*iFmtAttrFields)[i]->Format()) == 0)
                        {
                        User::LeaveIfError( removedObjs.Append(i) );                        
                        }                        
                    }
                // Remove all format attributes of type format
                TInt removedCount( 0 );
                while ( removedObjs.Count() > 0 )
                    {
                    CSdpFmtAttributeField* obj = 
                        (*iFmtAttrFields)[removedObjs[0] - removedCount];
                    delete obj;
					obj = 0;
                    iFmtAttrFields->Remove( removedObjs[0] - removedCount);
                    removedObjs.Remove(0);
                    removedCount++;
                    }
                CleanupStack::PopAndDestroy();  // removedObjs

                // Remove format from format list
                iFormatList->Des().Delete( lexer.MarkedOffset(), 
                                        lexer.Offset() - lexer.MarkedOffset());
                iFormatList->Des().TrimAll();
                tokenRemoved = ETrue;
                }
            }
        }
    }

// ---------------------------------------------------------------------------
// CSdpMediaField::KeepFormatL
// ---------------------------------------------------------------------------
//
EXPORT_C void CSdpMediaField::KeepFormatL(const TDesC8& aFormat)
    {
    if ( !iFormatList )
        {
        User::Leave( KErrSdpCodecMediaField );
        }
    // Empty set will continue to be empty
    if ( iFormatList->Des().Length() > 0 )
        {                
        HBufC8* formatList = aFormat.AllocLC();       
        // Mark all format attributes not aFormat so that they will be deleted
        RArray<TInt> removedObjs;  
        CleanupClosePushL( removedObjs );         
        for ( TInt i( 0 ); i < iFmtAttrFields->Count(); i++ )
            {
			if (aFormat.CompareF((*iFmtAttrFields)[i]->Format()) != 0)
                {
                User::LeaveIfError( removedObjs.Append( i ) );                        
                }                                 
            }
        // Delete attribute fields
        TInt removedCount( 0 );
        while ( removedObjs.Count() > 0 )
            {
            CSdpFmtAttributeField* obj = 
                (*iFmtAttrFields)[removedObjs[0] - removedCount];
            delete obj;
            iFmtAttrFields->Remove( removedObjs[0] - removedCount );
            removedObjs.Remove( 0 );
            removedCount++;
            }
        CleanupStack::PopAndDestroy();  // removedObjs
        // Change format list
        delete iFormatList;
        iFormatList = formatList;
        CleanupStack::Pop();    // formatList
        }
    }

// ---------------------------------------------------------------------------
// CSdpMediaField::RejectMedia
// ---------------------------------------------------------------------------
//
EXPORT_C void CSdpMediaField::RejectMedia()
    {
    iPort = 0;
    iPortCount = 0;

    TLex8 lexer( *iFormatList );
    lexer.SkipSpaceAndMark();
    lexer.SkipCharacters();
    if ( lexer.TokenLength() > 0 )
        {
        TRAPD(err, KeepFormatL( lexer.MarkedToken() ));
        err++; // Nothing to do, if error happens. Silence compiler warning.
        }
    }