/*

* Copyright (c) 2007 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: 

*

*/

#ifndef DHCPWLANQUERYHANDLER_H

#define DHCPWLANQUERYHANDLER_H

#include <e32base.h>

#include <es_sock.h>

#include <in_sock.h>

#include "dhcppsyrequesterprogressobserver.h"

#include "dhcpconstants.h"

class CDhcpPsySocketListener;

class CDhcpDataRequestor;

class CDhcpConnectionEngine;

class CDhcpPsyDhcpServerIPResolver;

/**

*  Class for handling the DHCP Messages sending and receiving.

*

*  @lib dhcppositionprovider

*  @since S60 3.2

*/

class CDhcpWlanQueryHandler : public CActive

    {

    public:

        /**

         * Two-phased statical constructor which can leave

         *

         * @since S60 3.2

         */

        static CDhcpWlanQueryHandler* NewL(MDhcpPsyRequesterProgressObserver *aObserver);

        /**

         * C++ destructor

         *

         * @since S60 3.2

         */

        virtual ~CDhcpWlanQueryHandler();

    public:

        /**

         * Make DHCP location query to WLAN network

         * @param aIAPProfileId     Id to used IAP profile

         *

         */

        void MakeLocationQueryL (TUint32 aIAPProfileId );

        /**

        * Return location data for requestor.

         *

         * @returns   Address to location data object

         */

        HBufC8* LocationData ();

    protected:  // From CActive

        /**

        * Handles an active object's request completion event.

        */

        void RunL();

        /**

        * Cancellation of an outstanding request.

        */

        void DoCancel();

        /**

        * Handles a leave occurring in the RunL()

        */

        TInt RunError( TInt aErr );

    private:

        /**

         * C++ constructor

         *

         * @since S60 3.2

         */

        CDhcpWlanQueryHandler(MDhcpPsyRequesterProgressObserver *aObserver);

        /**

         * Symbian Os construtor which can leave

         *

         * @since S60 3.2

         */

        void ConstructL();

        /**

         * Release location based reserved resources

         *

         * @since S60 3.2

         */

        void Flush ();

    private:

        enum TDhcpWLanQueryStates

            {

            EDhpWlanIdle,

            EAttachToConnection,

            EDhcpIpAddressQuery,

            ESendDhcpLocatinQuery,

            EReceiveDhcpLocationAck,

            EWlanMakeQueryToConnectionIoctl,

            EStopExecution

            };

    private: // data

        // Address of psy progress observer object.

        MDhcpPsyRequesterProgressObserver *iPsyProgressObserver;

        /**

        * Socket server

        */

        RSocketServ iSocketServer;

        /**

        * Connection

        */

        RConnection iConnection;

        /**

        * Sockets

        */

        RSocket iSocket;

        //

        TDhcpWLanQueryStates iState;

        //

        CDhcpDataRequestor* iLctnDataRequestor;

        //

        CDhcpPsySocketListener* iLctnDataListener;

        //

        CDhcpPsyDhcpServerIPResolver* iDhcpResolver;

        //

        CDhcpConnectionEngine*    iConnectionEngine;

        // Owned

        HBufC8*     iLocationBufferData;

        //

        TInetAddr   iInetLclIpAddress;

        // Used IAP

        TUint32 iIapProfileId;

    };

#endif // DHCPWLANQUERYHANDLER_H