/*

* Copyright (c) 2010 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 : P&S key monitor for communication between VPN client

*               and SIP Profile server

* Name        : vpnsipobserver.cpp

* Part of     : VPN client / VPN Connection Agent

* Version     : 1.0

*

*/

// SYSTEM INCLUDES

#include <e32property.h>                  // For P&S key

#include <vpnsipobserverpskeys.h>         // For P&S key definition

// USER INCLUDES

#include "vpnsipobserver.h"

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

// two phased constructor

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

//             

CVpnSipObserver* CVpnSipObserver::NewL( CVPNConnAgt& aAgent )

    {// dkangchecked

    CVpnSipObserver* self = new( ELeave ) CVpnSipObserver( aAgent );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

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

// second phased constructor

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

//        

void CVpnSipObserver::ConstructL()

    {

    // KVpnSipState P&S key is used for communication between VPN client

    // and SIP Profile Server regarding SIP de/re-registration.

    // KPSVpnSipUid is defined in a SIP System State Monitor plugin

    // (CSipVpnMonitorAo).

    User::LeaveIfError( iSIPProperty.Attach( KPSVpnSipUid, KVpnSipState ) );

    // Start monitoring the P&S key.

    Subscribe();

    }

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

// C++ constructor

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

//

CVpnSipObserver::CVpnSipObserver( CVPNConnAgt& aAgent )

    : CActive( EPriorityStandard ),

      iAgent( aAgent )

    {

    CActiveScheduler::Add( this );

    }

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

// C++ destructor

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

//             

CVpnSipObserver::~CVpnSipObserver()

    {

    Cancel();

    iSIPProperty.Close();

    }

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

// CVpnSipObserver::RequestDeregister

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

//             

TInt CVpnSipObserver::RequestDeregister()

    {

    // Tells SIP Profile Server that a VPN session is about to be started.

    // This will trigger SIP deregistration process by SIP Profile Server.

    // Should not leave if failed. This will be handled by VPN Conn Agt.

    return iSIPProperty.Set( KPSVpnSipUid, KVpnSipState, EVpnInitiating );

    }

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

// CVpnSipObserver::RequestRegister

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

//             

TInt CVpnSipObserver::RequestRegister()

    {

    // Tells SIP Profile Server that a VPN session ended.

    // This will trigger SIP re-registration process by SIP Profile Server.	

    // Should not leave if failed. This will be handled by VPN Conn Agt.

    return iSIPProperty.Set( KPSVpnSipUid, KVpnSipState, EVpnTerminated );

    }

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

// CVpnSipObserver::RunL

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

//             

void CVpnSipObserver::RunL()

    {

    LOG_1( "CVpnSipObserver::RunL iStatus = %d", iStatus.Int());

    if ( iStatus == KErrNone ) 

        {

        TInt val = 0;

        // SIP Profile Server notified completion of SIP deregistration.

        TInt err = iSIPProperty.Get( KPSVpnSipUid, KVpnSipState, val );        

        if ( err == KErrNone && val == ESipDeregisterCompleted )

            {

            // If SIP is deregistered, let the VPN Connection Agent to 

            // proceed VPN session start.

            LOG_( "CVpnSipObserver::RunL SIP is deregistered. VPN Connection Agent continue with VPN start." );

            iAgent.ProceedServiceStart();            

            }

        else

            {

            // Keep monitoring.

            Subscribe();

            }

        }

    // Check if observer can be restarted.

    else if ( iStatus != KErrCancel 

           && iStatus != KErrServerTerminated

           && iStatus != KErrNotSupported )

        {

        // Keep monitoring.

        Subscribe();

        }

    else

        {

        // Error.

        LOG_1( "CVpnSipObserver::RunL Unknown error situation, iStatus = %d", iStatus.Int() );

        }

    }

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

// CVpnSipObserver::DoCancel

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

//                

void CVpnSipObserver::DoCancel()

    {

    iSIPProperty.Cancel();

    }

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

// CVpnSipObserver::Subscribe

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

//        

void CVpnSipObserver::Subscribe()

    {

    iSIPProperty.Subscribe( iStatus );

    SetActive();

    }