/*

* Copyright (c) 2006 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:  Implementation of WLAN Coverage Check class

*

*/

#include <wlanmgmtclient.h>

#include "wlancoveragecheck.h"

#include "NetworkInfoBase.h"

#include "ConnectionDialogsLogger.h"

/**

* Management frame information element IDs.

* needed to determine coverage

*/

enum T802Dot11InformationElementID

    {

    E802Dot11SsidIE                 = 0,

    E802Dot11SupportedRatesIE       = 1,

    E802Doi11FhParameterSetIE       = 2,

    E802Dot11DsParameterSetIE       = 3,

    E802Dot11CfParameterSetIE       = 4,

    E802Dot11TimIE                  = 5,

    E802Dot11IbssParameterSetIE     = 6,

    E802Dot11CountryIE              = 7,

    E802Dot11HoppingPatternParamIE  = 8,

    E802Dot11HoppingPatternTableIE  = 9,

    E802Dot11RequestIE              = 10,

    E802Dot11ChallengeTextIE        = 16,

    // Reserved for challenge text extension 17 - 31

    E802Dot11ErpInformationIE       = 42,

    E802Dot11ExtendedRatesIE        = 50,

    E802Dot11AironetIE              = 133,

    E802Dot11ApIpAddressIE          = 149,

    E802Dot11RsnIE                  = 221

    };

/**

* Bit masks for Capability Information field.

*/

enum T802Dot11CapabilityBitMask

    {

    E802Dot11CapabilityEssMask          = 0x0001,

    E802Dot11CapabilityIbssMask         = 0x0002,

    E802Dot11CapabilityCfPollableMask   = 0x0004,

    E802Dot11CapabilityCfPollRequestMask= 0x0008,

    E802Dot11CapabilityPrivacyMask      = 0x0010,

    E802Dot11ShortPreambleMask          = 0x0020,

    E802Dot11PbccMask                   = 0x0040,      

    E802Dot11ChannelAgilityMask         = 0x0080

    };

// ======================= MEMBER FUNCTIONS =================================

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

// CWlanCoverageCheck::CWlanCoverageCheck()

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

//

CWlanCoverageCheck::CWlanCoverageCheck() 

: CActive( EPriorityStandard )

    {

    CActiveScheduler::Add( this );

    }

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

// CWlanCoverageCheck::~CWlanCoverageCheck()

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

//

CWlanCoverageCheck::~CWlanCoverageCheck()

    {

    Cancel();

    }

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

// CWlanCoverageCheck::DoCancel

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

//

void CWlanCoverageCheck::DoCancel()

    {

    iWait.AsyncStop();

    }

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

// CWlanCoverageCheck::RunL

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

//

void CWlanCoverageCheck::RunL()

    {

    CLOG_WRITE( "RunL entered" );

    switch( iProgState )

        {

        case EScanning:

            {

            CLOG_WRITE( "Scanning state" );

            if( !iStatus.Int() )

                // The list is ready 

                {

                CLOG_WRITE( "No error" );

                iProgState = EDone;

                iWait.AsyncStop();

                CLOG_WRITE( "wait stopped" );

                }

            else

                // something went wrong -> no coverage.

                {

                CLOG_WRITE( "error" );

                iWait.AsyncStop();

                }

            }

            break;            

        case EDone:

            {

            CLOG_WRITE( "State Done entered" );

            iWait.AsyncStop();

            }

            break;

        default:

            {

            }

        }

    }

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

// CWlanCoverageCheck::ScanForPromptedSsidL

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

//

TBool CWlanCoverageCheck::ScanForPromptedSsidL( TWlanSsid aEnteredSsid,

                                TBool aBroadcast,

                                TWlanConnectionMode& aConnectionMode, 

                                TWlanConnectionSecurityMode& aSecurityMode,

                                TWlanConnectionExtentedSecurityMode& aExtSecurityMode,

                                TBool& aProtectedSetupSupported )

    {

    TBool found = EFalse;

    CLOG_WRITE( "ScanForPromptedSsidL started" );

    CWlanMgmtClient* wlanMgmt = CWlanMgmtClient::NewL();

    CleanupStack::PushL( wlanMgmt );

    CLOG_WRITE( "Client created" );

    CWlanScanInfo* scanInfo = CWlanScanInfo::NewL();

    CleanupStack::PushL( scanInfo );

    CLOG_WRITE( "Scaninfo created" );

    iProgState = EScanning;

    CLOG_WRITE( "State set to scanning" );

    if ( aBroadcast )

        {

        wlanMgmt->GetScanResults( iStatus, *scanInfo );

        }

    else

        {

        wlanMgmt->GetScanResults( aEnteredSsid, iStatus, *scanInfo );

        }

    CLOG_WRITE( "GetScanResult called" );

    SetActive();

    CLOG_WRITE( "SetActive called" );

    CLOG_WRITE( "wait started" );

    iWait.Start();

    CLOG_WRITE( "Wait returned" );

    // now we have the results and might start to work on them...

    if ( iProgState == EDone )

        {       //finished without error, work on the result...

        TSignalStrength signalStrength = ESignalStrengthMin;

        for ( scanInfo->First(); !scanInfo->IsDone(); scanInfo->Next() )

            {

            TUint8 ieLen( 0 );

            const TUint8* ieData;

            TBuf8<KWlanMaxSsidLength> ssid8;

            TInt ret = scanInfo->InformationElement( E802Dot11SsidIE, ieLen, 

                                                     &ieData );

            if ( ret == KErrNone ) 

                {               

                CLOG_WRITE( "Starting copying ssid" );  

                // get the ssid

                ssid8.Copy( ieData, ieLen );

                CLOG_WRITE( "SSID copied" );  

                if ( !aEnteredSsid.Compare( ssid8 ) )

                    {

                    // get the signal strength                        

                    TUint8 rxLevel8 = scanInfo->RXLevel();

                    TInt rxLevel = static_cast< TInt >( rxLevel8 );

                    TSignalStrength strength = ( TSignalStrength )rxLevel;

                    if ( !found || ( found && strength < signalStrength ) )

                        {

                        found = ETrue;

                        signalStrength = strength;

                        if ( scanInfo->Capability() & 

                             E802Dot11CapabilityEssMask )

                            {

                            aConnectionMode = 

                             ( TWlanConnectionMode )ENetworkModeInfrastructure;

                            }

                        else

                            {

                            aConnectionMode = 

                                    ( TWlanConnectionMode )ENetworkModeAdHoc;

                            }

                        aSecurityMode = scanInfo->SecurityMode();

                        aExtSecurityMode = scanInfo->ExtendedSecurityMode();

                        aProtectedSetupSupported = 

                                        scanInfo->IsProtectedSetupSupported();

                        CLOG_WRITEF( _L( "****Protected Setup in CWlanCoverageCheck::ScanForPromptedSsidL: %d***" ), aProtectedSetupSupported );

                        }

                    }

                }

            else

                {

                User::Leave( ret );

                }

            }

        CleanupStack::PopAndDestroy( scanInfo );

        CleanupStack::PopAndDestroy( wlanMgmt );

        }

    else

        {

        User::LeaveIfError( iStatus.Int() );        

        }

    return found;

    }