/*

* Copyright (c) 2005-2006 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:  Parser utility for beacon and probe response frames

*

*/

#include "core_frame_beacon.h"

#include "core_frame_dot11_ie.h"

#include "core_tools.h"

#include "am_debug.h"

const u16_t CORE_BEACON_LENGTH = 36;

const u16_t CORE_BEACON_TIMESTAMP_INDEX = 0;

const u16_t CORE_BEACON_BEACON_INTERVAL_INDEX = 8;

const u16_t CORE_BEACON_CAPABILITY_INDEX = 10;

const u16_t CORE_BEACON_IE_INDEX = 12;

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

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

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

//

core_frame_beacon_c* core_frame_beacon_c::instance(

    const core_frame_dot11_c& frame,

    bool_t is_copied )

    {

    DEBUG( "core_frame_beacon_c::instance()" );

    if ( frame.data_length() < CORE_BEACON_LENGTH )

        {

        DEBUG( "core_frame_beacon_c::instance() - not a valid 802.11 frame, frame is too short" );

        return NULL;

        }

    u8_t* buffer = const_cast<u8_t*>( frame.data() );

    u16_t buffer_length( 0 );

    if ( is_copied )

        {

        buffer_length = frame.data_length();

        buffer = new u8_t[buffer_length];

        if ( !buffer )

            {

            DEBUG( "core_frame_beacon_c::instance() - not able to allocate buffer for copying" );

            return NULL;            

            }

        core_tools_c::copy(

            buffer,

            frame.data(),

            buffer_length );            

        }

    core_frame_beacon_c* instance = new core_frame_beacon_c(

        frame.data_length(),

        buffer,

        buffer_length );

    if ( !instance )

        {

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

        if ( is_copied )

            {

            delete[] buffer;

            }

        return NULL;

        }

    if ( instance->type() != core_frame_dot11_c::core_dot11_type_beacon &&

         instance->type() != core_frame_dot11_c::core_dot11_type_probe_resp )

        {

        DEBUG( "core_frame_beacon_c::instance() - not a valid beacon or probe response frame" );

        delete instance;

        return NULL;

        }

    return instance;

    }

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

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

//

core_frame_beacon_c::~core_frame_beacon_c()

    {

    DEBUG( "core_frame_beacon_c::~core_frame_beacon_c()" );

    }

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

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

//

u16_t core_frame_beacon_c::first_ie_offset() const

    {

    return CORE_BEACON_IE_INDEX;

    }    

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

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

//

core_tsf_value_s core_frame_beacon_c::timestamp() const

    {

    core_tsf_value_s timestamp;

    core_tools_c::copy(

        &timestamp.tsf[0],

        payload_data() + CORE_BEACON_TIMESTAMP_INDEX,

        TSF_VALUE_LEN );

    return timestamp;

    }

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

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

//

u16_t core_frame_beacon_c::beacon_interval() const

    {

    return core_tools_c::get_u16( payload_data(),

        CORE_BEACON_BEACON_INTERVAL_INDEX );

    }

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

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

//

u16_t core_frame_beacon_c::capability() const

    {

    return core_tools_c::get_u16( payload_data(),

        CORE_BEACON_CAPABILITY_INDEX );

    }

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

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

//

core_frame_beacon_c::core_frame_beacon_c(

    u16_t data_length,

    const u8_t* data,

    u16_t max_data_length ) :

    core_frame_dot11_c( data_length, data, max_data_length )

    {

    DEBUG( "core_frame_beacon_c::core_frame_beacon_c()" );

    }