/*

* Copyright (c) 2006-2010 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:  Statemachine for handling traffic stream deletion from network side.

*

*/

/*

* %version: 9 %

*/

#include "core_operation_handle_delete_ts.h"

#include "core_operation_update_tx_rate_policies.h"

#include "core_tools.h"

#include "core_server.h"

#include "core_traffic_stream_list_iter.h"

#include "core_virtual_traffic_stream_list_iter.h"

#include "am_debug.h"

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

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

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

//

core_operation_handle_delete_ts_c::core_operation_handle_delete_ts_c(

    u32_t request_id,

    core_server_c* server,

    abs_core_driverif_c* drivers,

    abs_core_server_callback_c* adaptation,

    u8_t tid ) :

    core_operation_base_c( core_operation_handle_delete_ts, request_id, server, drivers, adaptation, 

        core_base_flag_none ),

    tid_m( tid )

    {

    DEBUG( "core_operation_handle_delete_ts_c::core_operation_handle_delete_ts_c()" );

    }

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

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

//

core_operation_handle_delete_ts_c::~core_operation_handle_delete_ts_c()

    {

    DEBUG( "core_operation_handle_delete_ts_c::~core_operation_handle_delete_ts_c()" );

    }

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

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

//

core_error_e core_operation_handle_delete_ts_c::next_state()

    {

    DEBUG( "core_operation_handle_delete_ts_c::next_state()" );

    switch ( operation_state_m )

        {              

        case core_state_init:

            {

            operation_state_m = core_base_state_parameters_set;

            if ( !server_m->get_core_settings().is_connected() )

                {

                DEBUG( "core_operation_handle_delete_ts_c::next_state() - not connected, nothing to do" );

                return core_error_general;

                }

            DEBUG1( "core_operation_handle_delete_ts_c::next_state() - network has requested deletion of TID %u",

                tid_m );

            core_traffic_stream_list_c& ts_list(

                server_m->get_connection_data()->traffic_stream_list() );

            core_virtual_traffic_stream_list_c& virtual_ts_list(

                server_m->get_connection_data()->virtual_traffic_stream_list() );

            core_traffic_stream_list_iter_c ts_iter( ts_list );

            virtual_ts_list.print_contents();

            ts_list.print_contents();

            core_traffic_stream_c* stream = NULL;

            core_traffic_stream_c* iter = ts_iter.first();

            while( iter )

                {

                if ( iter->tid() == tid_m )

                    {

                    stream = iter;

                    iter = NULL;

                    }

                else

                    {

                    iter = ts_iter.next();

                    }

                }

            if ( !stream )

                {

                DEBUG1( "core_operation_handle_delete_ts_c::next_state() - no traffic stream with TID %u found",

                    tid_m );

                return core_error_not_found;

                }

            u8_t user_priority = stream->user_priority();

            core_traffic_stream_direction_e direction = stream->direction();

            /**

             * Send a status update to all affected virtual traffic streams. 

             */

            set_virtual_traffic_stream_inactive_by_tid(

                tid_m,

                core_traffic_stream_status_inactive_deleted_by_ap );

            /**

             * Delete the actual traffic stream.

             */

            server_m->get_wpx_adaptation_instance().handle_ts_delete(

                tid_m, user_priority );           

            ts_iter.remove();

            if( direction == core_traffic_stream_direction_uplink ||

                direction == core_traffic_stream_direction_bidirectional )

                {

                server_m->get_connection_data()->set_ac_traffic_status(

                    core_tools_c::convert_user_priority_to_ac( user_priority ),

                    core_access_class_traffic_status_not_admitted );

                /**

                 * Send an indication to notify clients that this access class

                 * is no longer admitted.

                 * 

                 * We don't have to the check the ACM bits since the traffic

                 * stream wouldn't exist if the AP didn't require admission

                 * control.  

                 */

                DEBUG( "core_operation_handle_delete_ts_c::next_state() - traffic no longer admitted on this AC, notifying clients" );

                u8_t buf[5];

                buf[0] = static_cast<u8_t>( 

                    core_tools_c::convert_user_priority_to_ac( user_priority ) );

                buf[1] = static_cast<u8_t>(

                    core_access_class_traffic_status_not_admitted );

                adaptation_m->notify(

                    core_notification_ac_traffic_status_changed,

                    sizeof( buf ),

                    buf );

                /**

                 * Reset TX queue parameters back to default values.

                 */

                DEBUG( "core_operation_delete_ts_c::next_state() - resetting tx queue parameters" ); 

                drivers_m->set_tx_queue_parameters(

                    request_id_m,

                    core_tools_c::convert_user_priority_to_ac( user_priority ),

                    0,

                    server_m->get_device_settings().max_tx_msdu_life_time );

                }

            else

                {

                /**

                 * Since TX queue parameters apply only to uplink, there is nothing

                 * more to do on downlink streams.

                 */

                return core_error_ok; 

                }            

            break;

            }

        case core_base_state_parameters_set:

            {

            DEBUG( "core_operation_handle_delete_ts_c::next_state() - tx queue parameters reset" );

            return core_error_ok;

            }

        default:

            {

            ASSERT( false_t );

            }

        }

    return core_error_request_pending;

    }

void core_operation_handle_delete_ts_c::set_virtual_traffic_stream_inactive_by_tid(

    u8_t tid,

    core_traffic_stream_status_e stream_status )

    {

    DEBUG( "core_operation_handle_delete_ts_c::set_virtual_traffic_stream_inactive_by_tid()" );

    core_virtual_traffic_stream_list_c& virtual_ts_list(

        server_m->get_connection_data()->virtual_traffic_stream_list() );

    core_virtual_traffic_stream_list_iter_c virtual_ts_iter( virtual_ts_list );

    core_virtual_traffic_stream_c* virtual_iter = virtual_ts_iter.first();

    while( virtual_iter )

        {

        if( virtual_iter->tid() == tid )

            {

            u32_t id( virtual_iter->id() );

            /**

             * The virtual traffic stream is no longer mapped to any actual

             * traffic stream.

             */

            virtual_iter->set_tid(

                TRAFFIC_STREAM_TID_NONE );

            virtual_iter->set_status(

                stream_status );

            DEBUG1( "core_operation_handle_delete_ts_c::set_virtual_traffic_stream_inactive_by_tid() - virtual traffic stream with ID %u is now inactive",

                id );

            u8_t buf[5];                    

            core_tools_c::copy(

                &buf[0],

                reinterpret_cast<u8_t*>( &id ),

                sizeof( u32_t ) );

            buf[4] = static_cast<u8_t>( stream_status );

            adaptation_m->notify(

                core_notification_ts_status_changed,

                sizeof( buf ),

                buf );                    

            }

        virtual_iter = virtual_ts_iter.next();

        }

    }