// Copyright (c) 2005-2009 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          : csipunregistering.cpp

// Part of       : SIP Registration

// Version       : SIP/4.0 

//

#include "csipunregistering.h"

#include "CSIPRegistrar.h"

#include "SipAssert.h"

#include "sipcontactheader.h"

#include "sipresponse.h"

#include "MRegistrationOwner.h"

#include "siprequest.h"

#include "sipstrings.h"

#include "sipstrconsts.h"

// -----------------------------------------------------------------------------

// CSIPUnregistering::NewL

// -----------------------------------------------------------------------------

//

CSIPUnregistering* CSIPUnregistering::NewL(MRegistrationContext& aRegistration)

	{

	CSIPUnregistering* self = CSIPUnregistering::NewLC(aRegistration);

	CleanupStack::Pop(self);

	return self;

	}

// -----------------------------------------------------------------------------

// CSIPUnregistering::NewLC

// -----------------------------------------------------------------------------

//

CSIPUnregistering* CSIPUnregistering::NewLC(MRegistrationContext& aRegistration)

	{

	CSIPUnregistering* self = new (ELeave) CSIPUnregistering(aRegistration);

	CleanupStack::PushL(self);

	return self;

	}

// -----------------------------------------------------------------------------

// CSIPUnregistering::NewLC

// -----------------------------------------------------------------------------

//

void CSIPUnregistering::SetNeighbourStates(

	CSIPRegistrationState* aUnregistered)

	{

	__SIP_ASSERT_RETURN(aUnregistered, KErrArgument);

	iUnregistered = aUnregistered;

	}

// -----------------------------------------------------------------------------

// CSIPUnregistering::~CSIPUnregistering

// -----------------------------------------------------------------------------

//

CSIPUnregistering::~CSIPUnregistering()

	{

	}

// -----------------------------------------------------------------------------

// CSIPUnregistering::UnregisterL

// -----------------------------------------------------------------------------

//	

void CSIPUnregistering::UnregisterL(TTransactionId& aTransactionId,

					                CSIPRequest*    aRequest)

	{

	__SIP_ASSERT_LEAVE(aRequest, KErrArgument);	

	CSIPContactHeader* contact = static_cast<CSIPContactHeader*>(

		aRequest->Header(SIPStrings::StringF(SipStrConsts::EContactHeader),0));

	__SIP_ASSERT_LEAVE(contact->ExpiresParameter() == 0, KErrArgument);

	// registrar must not be NULL after registering succeed.

	__SIP_ASSERT_LEAVE(iRegistration.Registrar(), KErrGeneral);

	// copy CallId and CSeq header from binding's registrar to request.

	iRegistration.Registrar()->FillCallIdAndCSeqL(*aRequest);

	// update registration expires parameter from aRequest Contact header

	iRegistration.SetExpiresValueL(*aRequest);

	// copy To and From header from registration binding to request

	iRegistration.FillToFromL(*aRequest);

	iRegistration.UnregisterL(aTransactionId, aRequest);

	}

// -----------------------------------------------------------------------------

// CSIPUnregistering::ReceiveL

// -----------------------------------------------------------------------------

//	

void CSIPUnregistering::ReceiveL(TTransactionId aTransactionId,

		                         CSIPResponse*  aResponse)

	{

	__SIP_ASSERT_LEAVE(aResponse, KErrArgument);

	// the expires parameter value must be 0, other wise panic in debug

	// mode, leaves in release mode.

	__SIP_ASSERT_LEAVE(iRegistration.Contact().ExpiresParameter() == 0, 

		KErrGeneral);

	if (aResponse->Type() == CSIPResponse::E1XX)

		{

		// pass provisional response to owner. 

		PassResponseToOwnerL(aResponse, aTransactionId,

			iRegistration.RegistrationId());

		}

	else 

		{

        // any final response (response code start from 200-)

		// will terminate the binding. so this function is 

		// called in order to remove the binding. 

		iRegistration.ReceivedErrorResponseL();

		PassResponseToOwnerL(aResponse, aTransactionId,

			iRegistration.RegistrationId());

		iRegistration.SelfDetach(ETrue);

		iRegistration.ChangeState(iUnregistered);

		}

	}

// -----------------------------------------------------------------------------

// CSIPUnregistering::TransactionEnded

// -----------------------------------------------------------------------------

//

TInt CSIPUnregistering::TransactionEnded(TTransactionId aTransactionId, 

		                                 TInt           aReason)

	{

	if (aReason != KErrNone)

		{

		iRegistration.ChangeState(iUnregistered);

		}

	// pass error to owner.

	return (PassErrorToOwner(aReason, aTransactionId, 

		iRegistration.RegistrationId()));	

	}

// -----------------------------------------------------------------------------

// CSIPUnregistering::CSIPUnregistering

// -----------------------------------------------------------------------------

//

CSIPUnregistering::CSIPUnregistering(MRegistrationContext& aRegistration)

	: CSIPRegistrationState (aRegistration)

	{

	}