// 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          : csipregistering.cpp

// Part of       : SIP Registration

// Version       : SIP/4.0 

//

#include "csipregistering.h"

#include "SipAssert.h"

#include "CSIPRegistrar.h"

#include "siprequest.h"

#include "sipresponse.h"

#include "sipcontactheader.h"

#include "sipminexpiresheader.h"

#include "MRegistrationOwner.h"

#include "CSIPResponseUtility.h"

#include "siperr.h"

#include "sipstrings.h"

#include "sipstrconsts.h"

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

// CSIPRegistering::NewL

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

//

CSIPRegistering* CSIPRegistering::NewL(MRegistrationContext& aRegistration)

	{

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

	CleanupStack::Pop(self);

	return self;

	}

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

// CSIPRegistering::NewLC

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

//

CSIPRegistering* CSIPRegistering::NewLC(MRegistrationContext& aRegistration)

	{

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

	CleanupStack::PushL(self);

	return self;

	}

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

// CSIPRegistering::SetNeighbourStates

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

//	

void CSIPRegistering::SetNeighbourStates(

	CSIPRegistrationState* aResponse423Received,

	CSIPRegistrationState* aRegistered,

	CSIPRegistrationState* aUnregistered)

	{

	__SIP_ASSERT_RETURN(aResponse423Received, KErrArgument);

    __SIP_ASSERT_RETURN(aRegistered, KErrArgument);

	__SIP_ASSERT_RETURN(aUnregistered, KErrArgument);

    iResponse423Received = aResponse423Received;

	iRegistered = aRegistered;

	iUnregistered = aUnregistered;

	}

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

// CSIPRegistering::~CSIPRegistering

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

//

CSIPRegistering::~CSIPRegistering()

	{

	}

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

// CSIPRegistering::CSIPRegistering

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

//

CSIPRegistering::CSIPRegistering(MRegistrationContext& aRegistration)

	: CSIPRegistrationState(aRegistration)

	{

	}

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

// CSIPRegistering::RegisterL

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

//	

void CSIPRegistering::RegisterL(TTransactionId&  aTransactionId, 

								CSIPRequest*     aRequest,

		                        CSIPRouteHeader* aOutboundProxy)

	{

    __SIP_ASSERT_LEAVE(aRequest, KErrArgument);

	// if registrar is not NULL, fill in CallId and CSeq to request

	if (iRegistration.Registrar())

		{

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

		}

	iRegistration.RegisterL(aTransactionId, aRequest, aOutboundProxy);

	}

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

// CSIPRegistering::ReceiveL

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

//

void CSIPRegistering::ReceiveL(TTransactionId aTransactionId, 

		                       CSIPResponse*  aResponse)

	{

	__SIP_ASSERT_LEAVE(aResponse, KErrArgument);

	// the expires parameter value must not be 0, other wise panic in debug

	// mode, leaves in release mode.

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

		KErrGeneral);

	if (aResponse->Type() == CSIPResponse::E2XX)

		{

		// ConnectionMgr may have changed the the host part of the Contact

		iRegistration.UpdateContactFromRequestL();

		if (iRegistration.Request())

			{			

			iRegistration.Request()->DeleteHeaders(

				SIPStrings::StringF(SipStrConsts::ERouteHeader));

			}

        TInt err = 

            CSIPResponseUtility::Check2XXResponse(iRegistration,*aResponse);

        if (err)

			{

			iRegistration.ReceivedErrorResponseL();

			User::LeaveIfError(PassErrorToOwner(err,aTransactionId));

			delete aResponse;

			iRegistration.SelfDetach(ETrue);

			iRegistration.ChangeState(iUnregistered); 

			}

		// if there is no error, call function Received2XXResponseL,

		// which will update bindings, start timer for non refresh binding

		else 

			{

			iRegistration.Received2XXResponseL(*aResponse,aTransactionId);	

			// pass response to owner

			PassResponseToOwnerL(aResponse, aTransactionId, 

				iRegistration.RegistrationId());

			//if EFalse, detach from lower layer only for non refresh binding.

			iRegistration.SelfDetach(EFalse);

			// for non refresh register, the request ownership is not passed 

			// to lower, it can be deleted after 2xx response received. 

			iRegistration.ClearRequest();

			iRegistration.ChangeState(iRegistered); 

			}

		}

	else if (aResponse->IsErrorResponse())

		{

		// if 423 response is received and there is min expires header,

		// set min expires header from response to request and send 

		// the request again.

        const RStringF KMinExpiresHeaderName = 

            SIPStrings::StringF(SipStrConsts::EMinExpiresHeader);		

		if (aResponse->ResponseCode() == K423Response && 

			aResponse->HasHeader(KMinExpiresHeaderName))

			{

			iRegistration.Received423ResponseL(*aResponse);

			iRegistration.ChangeState(iResponse423Received);

			iRegistration.CurrentState().RegisterL(

			    aTransactionId,iRegistration.Request(),NULL);

			delete aResponse;

			}

		// either response code is 423, but no MinExpires-header in response

		// or response code not 423

		else

			{

			// function ReceivedErrorResponseL removes binding.

			iRegistration.ReceivedErrorResponseL();

			// pass response to owner

			PassResponseToOwnerL(aResponse, aTransactionId);

			iRegistration.SelfDetach(ETrue);

			iRegistration.ChangeState(iUnregistered);

			}

		}

	else // response type == 1XX

		{

		// pass provisional response to owner

		PassResponseToOwnerL(aResponse, aTransactionId);

		}

	}

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

// CSIPRegistering::TransactionEnded

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

//

TInt CSIPRegistering::TransactionEnded(TTransactionId aTransactionId, 

									   TInt           aReason)

	{

	if (aReason != KErrNone)

		{

		// changes state to unregistered if error received.

		iRegistration.ChangeState(iUnregistered);

		}

	// pass error to owner.

	return (PassErrorToOwner(aReason, aTransactionId));	

	}