/*******************************************************************************
    OpenAirInterface
    Copyright(c) 1999 - 2014 Eurecom

    OpenAirInterface is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.


    OpenAirInterface is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with OpenAirInterface.The full GNU General Public License is
   included in this distribution in the file called "COPYING". If not,
   see <http://www.gnu.org/licenses/>.

  Contact Information
  OpenAirInterface Admin: openair_admin@eurecom.fr
  OpenAirInterface Tech : openair_tech@eurecom.fr
  OpenAirInterface Dev  : openair4g-devel@lists.eurecom.fr

  Address      : Eurecom, Compus SophiaTech 450, route des chappes, 06451 Biot, France.

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

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(void)
{
  LOG_FUNC_IN;

  /* Initialize the EMM state machine */
  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(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));

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

  LOG_FUNC_RETURN (rc);
}

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

