/*
 * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The OpenAirInterface Software Alliance licenses this file to You under
 * the OAI Public License, Version 1.1  (the "License"); you may not use this file
 * except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.openairinterface.org/?page_id=698
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *-------------------------------------------------------------------------------
 * For more information about the OpenAirInterface (OAI) Software Alliance:
 *      contact@openairinterface.org
 */

/*****************************************************************************
Source      TrackingAreaUpdate.c

Version     0.1

Date        2013/05/07

Product     NAS stack

Subsystem   EPS Mobility Management

Author      Frederic Maurel

Description Defines the tracking area update EMM procedure executed by the
        Non-Access Stratum.

        The tracking area updating procedure is always initiated by the
        UE and is used to update the registration of the actual tracking
        area of a UE in the network, to periodically notify the availa-
        bility of the UE to the network, for MME load balancing, to up-
        date certain UE specific parameters in the network.

*****************************************************************************/

#include "emm_proc.h"
#include "nas_log.h"
#include "nas_timer.h"

#include "emmData.h"

#include "emm_sap.h"
#include "emm_cause.h"

#include <string.h> // memcmp, memcpy

/****************************************************************************/
/****************  E X T E R N A L    D E F I N I T I O N S  ****************/
/****************************************************************************/

/****************************************************************************/
/*******************  L O C A L    D E F I N I T I O N S  *******************/
/****************************************************************************/

/*
 * --------------------------------------------------------------------------
 *   Internal data handled by the tracking area update procedure in the UE
 * --------------------------------------------------------------------------
 */

/*
 * --------------------------------------------------------------------------
 *   Internal data handled by the tracking area update procedure in the MME
 * --------------------------------------------------------------------------
 */


/****************************************************************************/
/******************  E X P O R T E D    F U N C T I O N S  ******************/
/****************************************************************************/


/****************************************************************************/
/*********************  L O C A L    F U N C T I O N S  *********************/
/****************************************************************************/

/*
 * --------------------------------------------------------------------------
 *              Timer handlers
 * --------------------------------------------------------------------------
 */

/****************************************************************************
 **                                                                        **
 ** Name:        _emm_tau_t3430_handler()                                  **
 **                                                                        **
 ** Description: T3430 timeout handler                                     **
 **                                                                        **
 **              3GPP TS 24.301, section 5.5.3.2.6 case c                  **
 **                                                                        **
 ** Inputs:      args:          handler parameters                         **
 **              Others:        None                                       **
 **                                                                        **
 ** Outputs:     None                                                      **
 **              Return:        None                                       **
 **              Others:        None                                       **
 **                                                                        **
 ***************************************************************************/
void *emm_tau_t3430_handler(void *args)
{
  LOG_FUNC_IN;
  nas_user_t *user = args;
  emm_timers_t *emm_timers = user->emm_data->emm_timers;

  LOG_TRACE(WARNING, "EMM-PROC  - T3430 timer expired");

  /* Stop timer T3430 */
  emm_timers->T3430.id = nas_timer_stop(emm_timers->T3430.id);

  LOG_FUNC_RETURN(NULL);
}