/*

* 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 and generating echo test frames.

*

*/

#include "core_frame_echo_test.h"

#include "core_tools.h"

#include "am_debug.h"

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

const u16_t CORE_FRAME_ECHO_TEST_LENGTH = 16;

const u16_t CORE_FRAME_ECHO_TOKEN_INDEX = 14;

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

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

//

core_frame_echo_test_c* core_frame_echo_test_c::instance(

    const core_frame_ethernet_c& frame )

    {

    DEBUG( "core_frame_echo_test_c::instance()" );

    if ( frame.data_length() < CORE_FRAME_ECHO_TEST_LENGTH )

        {

        DEBUG( "core_frame_echo_test_c::instance() - not a valid echo test frame, frame is too short" );

        return NULL;

        }

    core_frame_echo_test_c* instance = new core_frame_echo_test_c(

        frame.data_length(),

        frame.data(),

        0 );

    if ( !instance )

        {

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

        return NULL;

        }

    return instance;

    }

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

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

//

core_frame_echo_test_c* core_frame_echo_test_c::instance(

    const core_mac_address_s& destination,

    const core_mac_address_s& source,

    u16_t token )

    {

    const u8_t max_data_length = CORE_FRAME_ECHO_TEST_LENGTH;

    u8_t* buffer = new u8_t[max_data_length];

    if ( !buffer )

        {

        DEBUG( "core_frame_echo_test_c::instance() - unable create the internal buffer" );

        return NULL;

        }

    core_frame_echo_test_c* instance =

        new core_frame_echo_test_c( 0, buffer, max_data_length );

    if ( !instance )

        {

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

        delete[] buffer;

        buffer = NULL;

        return NULL;

        }

    instance->generate(

        destination,

        source,

        token );

    return instance;    

    }

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

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

//

core_frame_echo_test_c::~core_frame_echo_test_c()

    {

    DEBUG( "core_frame_echo_test_c::~core_frame_echo_test_c()" );

    }

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

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

//

u16_t core_frame_echo_test_c::token() const

    {

    return core_tools_c::get_u16_big_endian( data_m, CORE_FRAME_ECHO_TOKEN_INDEX );

    }

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

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

//

void core_frame_echo_test_c::generate(

    const core_mac_address_s& destination,

    const core_mac_address_s& source,

    u16_t token )

    {

    ASSERT( !data_length_m );

    ASSERT( max_data_length_m );   

    // Ethernet header

    core_frame_ethernet_c::generate(    

        destination,

        source,    

        core_frame_ethernet_c::core_ethernet_type_test );

    // Token

    u16_t temp16 = core_tools_c::convert_host_to_big_endian(

        token  );

    core_tools_c::copy(

        &data_m[data_length_m],

        reinterpret_cast<u8_t*>( &temp16 ),

        sizeof( temp16 ) );

    data_length_m += sizeof( temp16 );    

    }

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

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

//

core_frame_echo_test_c::core_frame_echo_test_c(

    u16_t data_length,

    const u8_t* data,

    u16_t max_data_length ) :

    core_frame_ethernet_c( data_length, data, max_data_length )

    {

    DEBUG( "core_frame_echo_test_c::core_frame_echo_test()" );

    }