/*

* Copyright (c) 2002-2010 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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 the UmacDot11Idle class

*

*/

/*

*/

#include "config.h"

#include "UmacDot11Idle.h"

#include "UmacContextImpl.h"

#include "UmacWsaWriteMib.h"

#include "umacwharelease.h"

#include "wha_mibDefaultvalues.h"

#include "UmacWsaAddKey.h"

#include "UmacWsaKeyIndexMapper.h"

#ifndef NDEBUG

const TInt8 WlanDot11Idle::iName[] = "dot11-idle";

const TUint8 WlanDot11Idle::iStateName

    [ESTATEMAX][KMaxStateStringLength] = 

    {

        {"EINIT"}, 

        {"EWRITEMIB"},

        {"EFINIT"}

    };

const TUint8 WlanDot11Idle::iEventName

    [EEVENTMAX][KMaxEventStringLength] = 

    {

        {"ESTATEENTRY"}, {"ETXCOMPLETE"}, {"ESCAN"}, 

        {"ECONNECT"}, {"ECONNECTIBSS"}, {"EDISCONNECT"}, 

        {"ERELEASE"}, {"EABORT"}

    };

#endif

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

#ifndef NDEBUG 

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

// 

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

//

const TInt8* WlanDot11Idle::GetStateName( TUint8& aLength ) const

    {

    aLength = sizeof( iName );

    return iName;

    }

#endif

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

// 

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

//

void WlanDot11Idle::Set( TInt aCompletionCode ) 

    { 

    iEventMask |= KCompleteUponEntry;

    iCompletionCode = aCompletionCode; 

    }

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

// 

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

//

void WlanDot11Idle::CompleteScanUponEntry()

    {

    iEventMask |= KIndicateScanCompletionUponEntry;

    }

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

// 

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

//

void WlanDot11Idle::Entry( WlanContextImpl& aCtxImpl )

    {

    if ( aCtxImpl.WsaCmdActive() )

        {

        // sanity checking code

        OsAssert( (TUint8*)("UMAC * panic"), (TUint8*)(WLAN_FILE), __LINE__ );

        }

    if ( iState != EINIT )

        {

        // this is NOT the start of the the FSM actions

        // note that we send the ETXCOMPLETE event as the states

        // that wait for it are the only ones that can be interrupted

        // as they are asynchronous operations by nature

        // and wait for corresponding WHA completion method

        Fsm( aCtxImpl, ETXCOMPLETE );

        }

    else

        {

        // this is the start of the the FSM actions

        Fsm( aCtxImpl, ESTATEENTRY );

        }

    }

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

// 

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

//

void WlanDot11Idle::Exit( WlanContextImpl& /*aCtxImpl*/ )

    {

    // reset fsm for the next time we come back to this state

    iState = EINIT;

    }

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

// 

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

//

TInt WlanDot11Idle::StartIBSS(

    WlanContextImpl& aCtxImpl,

    const TSSID& aSSID,                 

    TUint32 aBeaconInterval,            

    TUint32 aAtim,                      

    TUint32 aChannel,                   

    TEncryptionStatus aEncryptionStatus)

    {

    aCtxImpl.NetworkOperationMode( WHA::EIBSS );

    GenerateRandomBssIDForIbss( aCtxImpl );

    (aCtxImpl.GetSsId()) = aSSID;   

    aCtxImpl.NetworkChannelNumeber( aChannel );

    aCtxImpl.NetworkBeaconInterval( aBeaconInterval );

    aCtxImpl.AtimWindow( aAtim );

    aCtxImpl.UseShortPreamble( ETrue );

    (aCtxImpl.EncryptionStatus()) = aEncryptionStatus;           

    // clear & set our supported rates

    //

    aCtxImpl.GetOurSupportedRatesIE().Clear();

    aCtxImpl.GetOurExtendedSupportedRatesIE().Clear();

    TUint rateCount ( 0 );

    TUint8 rate_to_add( 0 );

    aCtxImpl.ClearBasicRateSet();    

    aCtxImpl.GetMinBasicRate() = 0;

    aCtxImpl.GetMaxBasicRate() = 0;

    for (TUint i = 0; i < KMaxNumberOfDot11bAndgRates; ++i )

        {

        OsTracePrint( 

            KUmacDetails, 

            (TUint8*)("UMAC: WlanDot11Idle::StartIBSS(): iSupportedRate: %d"),

            aCtxImpl.iSupportedRatesLookUpTable[i].iSupportedRate );

        if ( aCtxImpl.iSupportedRatesLookUpTable[i].iSupportedRate)

            {

            if ( rateCount < KMaxNumberOfRates )

                {

                rate_to_add 

                    = aCtxImpl.iSupportedRatesLookUpTable[i].iSupportedRate;

                if ( rate_to_add == E802Dot11Rate1MBit ||

                     rate_to_add == E802Dot11Rate2MBit ||

                     rate_to_add == E802Dot11Rate5p5MBit ||

                     rate_to_add == E802Dot11Rate11MBit )

                    {

                    // make this rate a basic rate

                    rate_to_add |= KBasicRateMask;

                    // and add it to our WHA basic rate mask

                    aCtxImpl.BasicRateSetBitSet( 

                        aCtxImpl.iSupportedRatesLookUpTable[i].iWsaRate );

                    // store min basic rate

                    if ( aCtxImpl.GetMinBasicRate() == 0 )

                        {

                        aCtxImpl.GetMinBasicRate() = 

                            aCtxImpl.iSupportedRatesLookUpTable[i].iWsaRate;

                        }

                    // store max basic rate

                    if ( aCtxImpl.GetMaxBasicRate() < 

                         aCtxImpl.iSupportedRatesLookUpTable[i].iWsaRate )

                        {

                        aCtxImpl.GetMaxBasicRate() 

                            = aCtxImpl.iSupportedRatesLookUpTable[i].iWsaRate;

                        }

                    }

                aCtxImpl.GetOurSupportedRatesIE().Append( rate_to_add );

                ++rateCount;

                OsTracePrint( 

                    KUmacDetails, 

                    (TUint8*)("UMAC: rateCount: %d"), rateCount );

                }

            else

                {

                aCtxImpl.GetOurExtendedSupportedRatesIE().Append( 

                    aCtxImpl.iSupportedRatesLookUpTable[i].iSupportedRate );

                OsTracePrint( KUmacDetails, 

                    (TUint8*)("UMAC: %d:th rate added to ext rates"), i + 1 );                    

                }

            }

        }

#ifndef NDEBUG 

    OsTracePrint( 

        KUmacDetails, 

        (TUint8*)("UMAC: WlanDot11Idle::StartIBSS(): supported rates len: %d"),

        aCtxImpl.GetOurSupportedRatesIE().iHeader.iLength );                    

    TUint8* ptr 

        = reinterpret_cast<TUint8*>

        (&(aCtxImpl.GetOurSupportedRatesIE().iSupportedRatesIE));

    for (TUint8 j = 0; j < aCtxImpl.GetOurSupportedRatesIE().iHeader.iLength; j++ )

        {

        OsTracePrint( 

            KUmacDetails, 

            (TUint8*)("UMAC: WlanDot11Idle::StartIBSS(): supported rate: %d"),

            *ptr );                    

        ptr++;

        }

    OsTracePrint( 

        KUmacDetails, 

        (TUint8*)("UMAC: WlanDot11Idle::StartIBSS(): ext supported rates len: %d"),

        aCtxImpl.GetOurExtendedSupportedRatesIE().iHeader.iLength );                    

    ptr = reinterpret_cast<TUint8*>

        (&(aCtxImpl.GetOurExtendedSupportedRatesIE().iSupportedRatesIE));

    for (TUint8 j = 0 

        ; j < aCtxImpl.GetOurExtendedSupportedRatesIE().iHeader.iLength 

        ; j++ )

        {

        OsTracePrint( KUmacDetails, 

            (TUint8*)("UMAC: extended supported rate: %d"), *ptr );

        ptr++;

        }

    OsTracePrint( KUmacDetails, (TUint8*)

        ("UMAC: min basic WHA rate: 0x%08x"), aCtxImpl.GetMinBasicRate() );

    OsTracePrint( KUmacDetails, (TUint8*)

        ("UMAC: max basic WHA rate: 0x%08x"), aCtxImpl.GetMaxBasicRate() );

#endif

    // as we are starting our own IBSS nw, the "common" rates between us

    // and the network are our supported rates

    aCtxImpl.RateBitMask( aCtxImpl.WHASettings().iRates );

    // determine U-APSD usage for the ACs/Tx queues; which in this (IBSS) case

    // means disabling U-APSD 

    DetermineAcUapsdUsage( aCtxImpl );

    // inform the next state that we are starting a new IBSS

    aCtxImpl.iStates.iPrepareForIbssMode.Set( ETrue );

    Fsm( aCtxImpl, ECONNECTIBSS );

    // global state transition will occur

    return ETrue;

    }

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

// 

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

//

TBool WlanDot11Idle::Connect(

    WlanContextImpl& aCtxImpl,

    const TSSID& aSSID,                 

    const TMacAddress& aBSSID,          

    TUint16 aAuthAlgorithmNbr,      

    TEncryptionStatus aEncryptionStatus,

    TBool aIsInfra,

    TUint16 aScanResponseFrameBodyLength,

    const TUint8* aScanResponseFrameBody,

    const TUint8* aIeData,

    TUint16 aIeDataLength )

    {

    TBool ret( ETrue );

    (aCtxImpl.GetBssId())= aBSSID;   

    (aCtxImpl.GetSsId()) = aSSID;   

    (aCtxImpl.EncryptionStatus()) = aEncryptionStatus;           

    (aCtxImpl.AuthenticationAlgorithmNumber()) = aAuthAlgorithmNbr;

    // set the BSSID field

    (aCtxImpl.GetAuthenticationFrame()).iHeader.iBSSID 

        = (aCtxImpl.GetBssId());

    (aCtxImpl.GetHtAuthenticationFrame()).iHeader.iBSSID 

        = (aCtxImpl.GetBssId());

    // set the DA field

    (aCtxImpl.GetAuthenticationFrame()).iHeader.iDA 

        = (aCtxImpl.GetBssId()); 

    (aCtxImpl.GetHtAuthenticationFrame()).iHeader.iDA 

        = (aCtxImpl.GetBssId()); 

    // set the SA field

    (aCtxImpl.GetAuthenticationFrame()).iHeader.iSA 

        = aCtxImpl.iWlanMib.dot11StationId;

    (aCtxImpl.GetHtAuthenticationFrame()).iHeader.iSA 

        = aCtxImpl.iWlanMib.dot11StationId;

    aCtxImpl.NetworkOperationMode( 

        aIsInfra ? WHA::EBSS : WHA::EIBSS );

    // store Tx IE data for later access

    // pointers supplied are valid to the point the

    // corresponding completion method is called

    aCtxImpl.IeData( aIeData );

    aCtxImpl.IeDataLength( aIeDataLength );

    // check do we meet the requirements for the network

    // and construct necessary objects for establishing the connection

            aCtxImpl, 

            aScanResponseFrameBodyLength, 

        {

        // continue

        // make WHA types

        WHA::SSSID ssid;

        ssid.iSSIDLength = aSSID.ssidLength;

        os_memcpy( ssid.iSSID, aSSID.ssid, ssid.iSSIDLength );

        // infrastructure or IBSS mode

        if ( aIsInfra )

            {

            OsTracePrint( KUmacDetails, (TUint8*)

                ("UMAC: WlanDot11Idle::Connect: infra"));

            Fsm( aCtxImpl, ECONNECT );            

            }

        else    // --- IBSS mode ---

            {

            OsTracePrint( KUmacDetails, (TUint8*)

                ("UMAC: WlanDot11Idle::Connect: IBSS"));

            Fsm( aCtxImpl, ECONNECTIBSS );

            }

        }

    else    // --- InitNetworkConnect failure ---

        {

        // abort

        ret = EFalse;

        }

    return ret;    

    }

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

// 

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

//

TBool WlanDot11Idle::Disconnect( 

    WlanContextImpl& aCtxImpl )

    {

    Fsm( aCtxImpl, EDISCONNECT );

    // global state transition will occur

    return ETrue;

    }

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

// 

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

//

TBool WlanDot11Idle::RealScan(

    WlanContextImpl& aCtxImpl,

    TScanMode aMode,                    

    const TSSID& aSSID,                 

    TUint32 aScanRate,                    

    SChannels& aChannels,

    TUint32 aMinChannelTime,            

    TUint32 aMaxChannelTime,

    TBool aSplitScan )                 

    {

    // scanning mode requested

    // set parameters

    // NOTE: OID command parameters are guaranteed to be valid

    // to the point a correcponding completion method is called

    aCtxImpl.iStates.iIdleScanningMode.Set( 

        aMode, aSSID, aScanRate, aChannels, 

        aMinChannelTime, aMaxChannelTime, aSplitScan );

    Fsm( aCtxImpl, ESCAN );

    return ETrue; // global statemachine transition will occur 

    }

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

// 

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

//

void WlanDot11Idle::FinitSystem( 

    WlanContextImpl& aCtxImpl )

    {

    Fsm( aCtxImpl, ERELEASE );

    }

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

// 

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

//

TBool WlanDot11Idle::AddBroadcastWepKey(

    WlanContextImpl& aCtxImpl,

    TUint32 aKeyIndex,             

    TBool aUseAsDefaulKey,                

    TUint32 aKeyLength,                      

    const TUint8 aKey[KMaxWEPKeyLength],

    const TMacAddress& aMac )

    {

    return OnAddBroadcastWepKey( aCtxImpl, aKeyIndex, aUseAsDefaulKey, 

        EFalse, // do not set as PTK

        aKeyLength, aKey, aMac );

    }

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

// 

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

//

TBool WlanDot11Idle::AddUnicastWepKey(

    WlanContextImpl& aCtxImpl,

    const TMacAddress& aMacAddr,

    TUint32 aKeyLength,                      

    const TUint8 aKey[KMaxWEPKeyLength])

    {

    // allocate memory for the key structure

    WHA::SWepPairwiseKey* key = static_cast<WHA::SWepPairwiseKey*>

        (os_alloc( WHA::SWepPairwiseKey::KHeaderSize + aKeyLength )); 

    if ( !key )

        {

        // allocation failure

        Fsm( aCtxImpl, EABORT );

        return EFalse;

        }

    os_memcpy( 

        &(key->iMacAddr), 

        aMacAddr.iMacAddress,

        sizeof(key->iMacAddr) );

    key->iKeyLengthInBytes = static_cast<TUint8>(aKeyLength);

    os_memcpy( key->iKey, aKey, key->iKeyLengthInBytes );

    WlanWsaAddKey& wsa_cmd = aCtxImpl.WsaAddKey();    

    wsa_cmd.Set( aCtxImpl, 

        WHA::EWepPairWiseKey,

        key,

        WlanWsaKeyIndexMapper::Extract( WHA::EWepPairWiseKey ) );

    // change global state: entry procedure triggers action

    ChangeState( aCtxImpl, 

        *this,              // prev state

        wsa_cmd,            // next state

        // the ACT

        KCompleteManagementRequest

        );                           

    os_free( key ); // allways remember to release the memory

    // signal caller that a state transition occurred

    return ETrue;

    }

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

// 

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

//

void WlanDot11Idle::ChangeInternalState( 

    WlanContextImpl& aCtxImpl, 

    TState aNewState )

    {

    iState = aNewState;

    Fsm( aCtxImpl, ESTATEENTRY );

    }

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

// 

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

//

void WlanDot11Idle::Fsm( 

    WlanContextImpl& aCtxImpl, 

    TEvent aEvent )

    {

    OsTracePrint( KUmacDetails, 

        (TUint8*)("UMAC * dot11-idle * FSM EVENT") );

#ifndef NDEBUG

    OsTracePrint( KUmacDetails, (TUint8*)("event:"));

    OsTracePrint( KUmacDetails, iEventName[aEvent] );

    OsTracePrint( KUmacDetails, (TUint8*)("state:"));

    OsTracePrint( KUmacDetails, iStateName[iState] );

#endif

    switch ( aEvent )

        {

        case ESTATEENTRY:

            OnStateEntryEvent( aCtxImpl );

            break;

        case ETXCOMPLETE:

            OnTxCompleteEvent( aCtxImpl );

            break;

        case ESCAN:

            OnScanEvent( aCtxImpl );

            break;

        case ECONNECT:

            OnConnectEvent( aCtxImpl );

            break;

        case ECONNECTIBSS:

            OnConnectIbssEvent( aCtxImpl );

            break;

        case EDISCONNECT:

            OnDisconnectEvent( aCtxImpl );

            break;

        case ERELEASE:

            OnReleaseEvent( aCtxImpl );

            break;