// 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:

//

/**

 @file

 @internalAll 

*/

#ifndef __ATGPRSCONTEXTDEACTIVATE_H

#define __ATGPRSCONTEXTDEACTIVATE_H

#include "ATBASE.H"

class CPhoneGlobals;

class CATGprsContextDeactivate : public CATCommands

/**

Sends the AT command to deactivate a context to the network.

CATGprsContextDeactivate inherits from the CATCommands class. 

This class transmits the following commands: ATH, +++ and ATH.

This will release the ppp chain and return to AT command mode.

@internalComponent

*/

	{

public:

	static CATGprsContextDeactivate * NewL(CATIO* aIo, CTelObject* aTelObject, CATInit* aInit, CPhoneGlobals* aPhoneGlobals);

	~CATGprsContextDeactivate ();

	virtual void Start(TTsyReqHandle aTsyReqHandle, TAny* /*aDummy*/);

	virtual void Stop(TTsyReqHandle aTsyReqHandle);

protected:

	CATGprsContextDeactivate (CATIO* aIo, CTelObject* aTelObject, CATInit* aInit, CPhoneGlobals* aPhoneGlobals);

	void ConstructL();

	virtual void EventSignal(TEventSource aSource);

	virtual void CompleteWithIOError(TEventSource aSource,TInt aStatus);

	virtual void Complete(TInt aError,TEventSource aSource);

private:

	void ValidateHangUpExpectStringL();

private:

	CCommChatString* iNoCarrierExpectString;				//< Pointer to response string.

	enum													

		{

		EATNotInProgress,									

		EDTRDropped,

		EWaitForDTRRaiseSettle,

		EATEscapeSeqWaitForWriteComplete,

		EATEscapeSeqCompleted,

		EATHangupWaitForWriteComplete,

		EATHangupReadCompleted,

		EHangUpCancelling

		} iState;											//< Enum for class states.

	};

#endif