/*
 * 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      emm_reg.c

Version     0.1

Date        2012/10/16

Product     NAS stack

Subsystem   EPS Mobility Management

Author      Frederic Maurel

Description Defines the EMMREG Service Access Point that provides
        registration services for location updating and attach/detach
        procedures.

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

#include "emm_reg.h"
#include "commonDef.h"
#include "nas_log.h"

#include "emm_fsm.h"

#include <assert.h>

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

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

/****************************************************************************
 **                                                                        **
 ** Name:    emm_reg_initialize()                                      **
 **                                                                        **
 ** Description: Initializes the EMMREG Service Access Point               **
 **                                                                        **
 ** Inputs:  None                                                      **
 **      Others:    None                                       **
 **                                                                        **
 ** Outputs:     None                                                      **
 **      Return:    None                                       **
 **      Others:    NONE                                       **
 **                                                                        **
 ***************************************************************************/
void emm_reg_initialize(nas_user_t *user)
{
  LOG_FUNC_IN;

  /* Initialize the EMM state machine */
  user->emm_fsm_status = emm_fsm_initialize();

  LOG_FUNC_OUT;
}

/****************************************************************************
 **                                                                        **
 ** Name:    emm_reg_send()                                            **
 **                                                                        **
 ** Description: Processes the EMMREG Service Access Point primitive       **
 **                                                                        **
 ** Inputs:  msg:       The EMMREG-SAP primitive to process        **
 **      Others:    None                                       **
 **                                                                        **
 ** Outputs:     None                                                      **
 **      Return:    RETURNok, RETURNerror                      **
 **      Others:    None                                       **
 **                                                                        **
 ***************************************************************************/
int emm_reg_send(nas_user_t *user, const emm_reg_t *msg)
{
  LOG_FUNC_IN;

  int rc;

  /* Check the EMM-SAP primitive */
  emm_reg_primitive_t primitive = msg->primitive;
  assert( (primitive > _EMMREG_START) && (primitive < _EMMREG_END));

  /* avoid gcc warnings */
  (void)primitive;

  /* Execute the EMM procedure */
  rc = emm_fsm_process(user, msg);

  LOG_FUNC_RETURN (rc);
}

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