// Copyright (c) 2001-2009 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:

//

#include "gprs.h"

#include "Gprscontext.h"

#include "mSLOGGER.H"

#include <pcktcs.h>

#include "ATGprsAttach.H"

#include "ATIO.H"

#include <etelpckt.h>

#include "TSYCONFG.H"

#include "NOTIFY.H"

#include "Matstd.h"

/** 

 * @file

 * This file implements the CATGprsAttach class which is one of the state machine used by the

 * GPRS AT TSY library.

 */

/**

 * This state machine uses the "AT+CGATT" command to connect to the GPRS network.

 */

_LIT8(KAttachCommand, "AT+CGATT=1\r");

CATGprsAttach* CATGprsAttach::NewL(CATIO* aIo, CTelObject* aTelObject, CATInit* aInit, CPhoneGlobals* aPhoneGlobals )

/**

 *  Standard 2 phase constructor.

 *

 * @param aIo pointer to communication object.

 * @param aTelObject pointer to parent.

 * @param aPhoneGlobals pointer to phone global wide states.

 */

	{

	CATGprsAttach* p =new(ELeave) CATGprsAttach(aIo, aTelObject, aInit, aPhoneGlobals);

	CleanupStack::PushL(p);

	p->ConstructL();

	CleanupStack::Pop();

	return p;

	}

void CATGprsAttach::ConstructL()

/**

 * Construct all objects that can leave.

 */

	{

	CATCommands::ConstructL();

	}

CATGprsAttach::CATGprsAttach(CATIO* aIo, CTelObject* aTelObject, CATInit* aInit, CPhoneGlobals* aPhoneGlobals)

	:CATCommands(aIo, aTelObject, aInit, aPhoneGlobals)

/**

 * Constructor.

 *

 * @param aIo pointer to communication object.

 * @param aTelObject pointer to parent.

 * @param aInit pointer to AT phone init object.

 * @param aPhoneGlobals pointer to phone global wide states.

 */

	{

	LOGTEXT(_L8("CATGprsAttach::CATGprsAttach called"));

	}

CATGprsAttach::~CATGprsAttach()

/**

 * Destructor.

 */

	{

	LOGTEXT(_L8("CATGprsAttach::~CATGprsAttach called"));

	iIo->RemoveExpectStrings(this);				

	}

void CATGprsAttach::Start(TTsyReqHandle aTsyReqHandle, TAny* /*aParams*/)

/**

 * This is the standard entry point for sending attach command.

 * @param aTsyReqHandle handle to the client.

 */

	{

	LOGTEXT(_L8("CATGprsAttach::Start called"));

	iReqHandle = aTsyReqHandle;

	iState=ESendAttachCommand;

	Write(KAttachCommand, KGprsCommandTimeOut);	

	}

void CATGprsAttach::Stop(TTsyReqHandle aTsyReqHandle)

/**

 * This funciton stops this AT state machine

 */

	{

	LOGTEXT(_L8("CATGprsAttach::Stop called"));

	if(iState!=EATNotInProgress && aTsyReqHandle==iReqHandle)

		{

		LOGTEXT(_L8("CATGprsAttach::Stop Completing client request with KErrCancel"));

		Complete(KErrCancel,ETimeOutCompletion);		// Pretend we have had a timeout

		}

	}

void CATGprsAttach::CompleteWithIOError(TEventSource aSource,TInt aStatus)

/**

 * This Function completes the command from the client with an error.

 * @param aSource source of event from communication class.

 * @param aStatus status of event.

 */

	{

	LOGTEXT(_L8("CATGprsAttach::CompleteWithIOError called"));

	Complete(aStatus, aSource);

	}

void CATGprsAttach::Complete(TInt aError,TEventSource aSource)

/**

 * This Function completes the command from the client.

 * @param aError an error code to relay to client.

 */

	{

	LOGTEXT2(_L8("CATGprsAttach::Complete called error: %d"), aError);

	RemoveStdExpectStrings();

	iIo->WriteAndTimerCancel(this);	

	iIo->RemoveExpectStrings(this);

	if (aError==KErrNone)

		{

		((CGprs*)iTelObject)->SetStatus(RPacketService::EStatusAttached);

		iPhoneGlobals->iNotificationStore->CheckNotification(iTelObject, EPacketStatusChanged);

		}

	// Allow our base class to do its thing and then complete the client request

	CATCommands::Complete(aError,aSource);		

	iTelObject->ReqCompleted(iReqHandle, aError);

	iState = EATNotInProgress;

	}

void CATGprsAttach::EventSignal(TEventSource aSource)

/**

 * This function contains the state machine for the command.  The states flow consecutively and are

 * described below.

 * @par ESendAttachCommand

 * Reads the Modem's response to the AT+CGATT=1 command and completes the request.

 */

	{

	LOGTEXT2(_L8("CATGprsAttach::EventSignal called with iState=%d"),iState);

	if ((aSource==ETimeOutCompletion))

		{

		LOGTEXT(_L8("CATGprsAttach::EventSignal, Timeout"));

		Complete(KErrTimedOut,aSource);

		return;

		}

	switch(iState)

		{

		case ESendAttachCommand:

			__ASSERT_ALWAYS(aSource==EWriteCompletion,Panic(EATCommand_IllegalCompletionWriteExpected));

			{

			LOGTEXT(_L8("CATGprsAttach::EventSignal, ESendConnectCommand"));

			__ASSERT_ALWAYS(aSource==EWriteCompletion,Panic(EATCommand_IllegalCompletionWriteExpected));

			StandardWriteCompletionHandler(aSource, KGprsLongCommandTimeOut);

			iState = EAttachReadComplete;

			}

			break;

		case EAttachReadComplete:

			__ASSERT_ALWAYS(aSource==EReadCompletion,Panic(EATCommand_IllegalCompletionWriteExpected));

			{

			LOGTEXT(_L8("CATGprsAttach::EventSignal, EConnectReadComplete"));

			__ASSERT_ALWAYS(aSource==EReadCompletion,Panic(EATCommand_IllegalCompletionReadExpected));

			TInt ret = ValidateExpectString();

			Complete(ret, aSource);

			}

			break;

		case EATNotInProgress:

			break;

		default:

			{

			LOGTEXT(_L8("CATGprsAttach::EventSignal, Default, panic"));

			Panic(EIllegalEvent);

			}

		}		

	}