/*

* Copyright (c) 2005 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:   Base class for OMA SUPL SMS Listener implementations

*

*/

#ifndef C_COMASUPLSMSLISTENERBASE_H

#define C_COMASUPLSMSLISTENERBASE_H

#include <e32base.h>

#include <e32std.h>

#include <es_sock.h>

#include <f32file.h>

/**  WDP Port on which to listen for incoming messages */

const TInt KWDPPort             = 7275;

/**

 *  Base class for OMA SUPL SMS Listener implementations

 *  @since S60 v3.1

 */

class COMASuplSmsListenerBase : public CActive

    {

public:

    /**  

     * States of SMS Listener component 

     */

    enum TState

        {

        EIdle = 0, 

        EListening, 

        EAcknowledging,

        ESubscriptionActive,

        ESettingsInitialized,

        EComplete

        };

public:

    /**

     * Destructor

     *

     */

    virtual ~COMASuplSmsListenerBase();

    /**

     * Listens for incoming SMS messages

     *

     * @since S60 v3.1

     */

    void ListenForSMSL();

	/**

	 * Wrapper function used for tracing

	 *

	 */

	void Trace( const TDesC& aMessage, const TDesC& aFileName, TInt line );

protected:

    /** 

     * Connection to Socket Server

     */

    RSocketServ 	            iSocketServer;

    /** 

     * Socket over which SMS is received

     */

    RSocket 		            iSocket;

    /**

     * Connection to File server required by CSMSMessage API

     */

    RFs 			            iFs;

    /** 

     * 

     */

    TPckgBuf<TUint>             iBuf;

    /** 

     * Current state transition

     */

    TState 			            iState;

protected:

    /**

     * Constructor

     *

     */

    COMASuplSmsListenerBase();

	/*

	 * Forwards message to SUPL gateway

	 *

	 * @since S60 v3.1

	 */

    // from base class CActive    

    /**

     * Cancels outanding events

     *

     */	

	void DoCancel();

    /**

     * Event handling function

     *

     */	

	void RunL();

private:

    /**

     * Associates the socket with a specific address family 

     * based on the implementation and binds the socket

     *

     * @since S60 v3.1

     */

    virtual void InitializeL()		= 0;

    /**

     * Extracts the payload from the received SMS message

     *

     * @since S60 v3.1

     */	

    virtual void ProcessMessageL()	= 0;

    };

#include "epos_comasuplsmslistenerbase.inl"

#endif  // C_COMASUPLSMSLISTENERBASE_H