/*

* Copyright (c) 2006-2007 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:  Class for parsing WMM QoS IEs.

*

*/

#include "core_frame_wmm_ie.h"

#include "core_tools.h"

#include "core_tools_parser.h"

#include "am_debug.h"

const u8_t CORE_FRAME_WMM_IE_PARAMETER_LENGTH = 26;

const u8_t CORE_FRAME_WMM_IE_PARAMETER_OUI_OFFSET = 2;

const u8_t CORE_FRAME_WMM_IE_PARAMETER_OUI_LENGTH = 5;

const u8_t CORE_FRAME_WMM_IE_PARAMETER_OUI[] = { 0x00, 0x50, 0xF2, 0x02, 0x1 };

const u8_t CORE_FRAME_WMM_IE_PARAMETER_VERSION_OFFSET = 7;

const u8_t CORE_FRAME_WMM_IE_PARAMETER_QOS_INFO_OFFSET = 8;

const u8_t CORE_FRAME_WMM_IE_PARAMETER_ACI_BE_OFFSET = 10;

const u8_t CORE_FRAME_WMM_IE_PARAMETER_ACI_BK_OFFSET = 14;

const u8_t CORE_FRAME_WMM_IE_PARAMETER_ACI_VI_OFFSET = 18;

const u8_t CORE_FRAME_WMM_IE_PARAMETER_ACI_VO_OFFSET = 22;

const u8_t CORE_FRAME_WMM_IE_PARAMETER_UAPSD_MASK = 0x80;

const u8_t CORE_FRAME_WMM_IE_PARAMETER_ACM_MASK = 0x10;

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

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

//

core_frame_wmm_ie_parameter_c* core_frame_wmm_ie_parameter_c::instance(

    const core_frame_dot11_ie_c& ie )

    {

    if ( ie.data_length() != CORE_FRAME_WMM_IE_PARAMETER_LENGTH )

        {

        DEBUG( "core_frame_wmm_ie_parameter_c::instance() - not a valid IE, invalid length" );

        return NULL;

        }

    if ( core_tools_c::compare(

        &ie.data()[CORE_FRAME_WMM_IE_PARAMETER_OUI_OFFSET],

        CORE_FRAME_WMM_IE_PARAMETER_OUI_LENGTH,

        &CORE_FRAME_WMM_IE_PARAMETER_OUI[0],

        CORE_FRAME_WMM_IE_PARAMETER_OUI_LENGTH ) )

        {

        DEBUG( "core_frame_wpa_ie_c::instance() - not a valid IE, WMM OUI missing" );

        return NULL;       

        }

    core_frame_wmm_ie_parameter_c* instance = new core_frame_wmm_ie_parameter_c(

        ie.data_length(),

        ie.data(),

        0 );

    if ( !instance )

        {

        DEBUG( "core_frame_wmm_ie_parameter_c::instance() - unable to create an instance" );

        return NULL;

        }

    return instance;

    }

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

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

//       

core_frame_wmm_ie_parameter_c::~core_frame_wmm_ie_parameter_c()

    {

    }

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

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

//

u8_t core_frame_wmm_ie_parameter_c::version() const

    {

    return data_m[CORE_FRAME_WMM_IE_PARAMETER_VERSION_OFFSET];

    }

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

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

//

bool_t core_frame_wmm_ie_parameter_c::is_uapsd_supported() const

    {

    if ( data_m[CORE_FRAME_WMM_IE_PARAMETER_QOS_INFO_OFFSET] & CORE_FRAME_WMM_IE_PARAMETER_UAPSD_MASK )

        {

        return true_t;

        }

    return false_t;

    }

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

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

//

bool_t core_frame_wmm_ie_parameter_c::is_admission_control_required(

    core_access_class_e access_class ) const

    {

    u8_t offset( 0 );

    switch ( access_class )

        {

        case core_access_class_best_effort:

            offset = CORE_FRAME_WMM_IE_PARAMETER_ACI_BE_OFFSET;

            break;

        case core_access_class_background:

            offset = CORE_FRAME_WMM_IE_PARAMETER_ACI_BK_OFFSET;

            break;

        case core_access_class_video:

            offset = CORE_FRAME_WMM_IE_PARAMETER_ACI_VI_OFFSET;

            break;

        case core_access_class_voice:

            /** Falls through on purpose. */

        default:

            offset = CORE_FRAME_WMM_IE_PARAMETER_ACI_VO_OFFSET;

            break;

        }

    if ( data_m[offset] & CORE_FRAME_WMM_IE_PARAMETER_ACM_MASK )

        {

        return true_t;

        }

    return false_t;    

    }

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

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

//

core_frame_wmm_ie_parameter_c::core_frame_wmm_ie_parameter_c(

    u16_t data_length,

    const u8_t* data,

    u16_t max_data_length ) :

    core_frame_dot11_ie_c( data_length, data, max_data_length )

    {

    }