/*
 * 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    user_indication.h

Version   0.1

Date    2012/10/25

Product   NAS stack

Subsystem Application Programming Interface

Author    Frederic Maurel

Description Defines functions which allow the user application to register
    procedures to be executed upon receiving asynchronous notifi-
    cation.

*****************************************************************************/
#ifndef __USER_IND_H__
#define __USER_IND_H__

#include "commonDef.h"
#include "networkDef.h"
#include "user_api_defs.h"

/****************************************************************************/
/*********************  G L O B A L    C O N S T A N T S  *******************/
/****************************************************************************/

/*
 * Type of notification that may be asynchronously received by the user
 */
typedef enum {
  USER_IND_REG = 0, /* Registration notification  */
  USER_IND_LOC, /* Location notification  */
  USER_IND_PLMN,  /* Network notification   */
  USER_IND_PDN, /* PDN connection notification  */
  USER_IND_MAX
} user_ind_t;

/*
 * Registration notification are received whenever there is a change in the
 * UE's network registration status in GERAN/UTRAN/E-UTRAN
 */
typedef struct {
  Stat_t status;  /* network registration status  */
} user_ind_reg_t;

/*
 * Location notification are received whenever there is a change in the
 * network serving cell in GERAN/UTRAN/E-UTRAN
 */
typedef struct {
  Stat_t status;  /* network registration status  */
  tac_t tac;    /* Location/Tracking area code  */
  ci_t ci;    /* GERAN/UTRAN/E-UTRAN cell ID  */
  AcT_t AcT;    /* Supported Access Technology  */
} user_ind_loc_t;

/*
 * PDN connection notification are received whenever the user or the network
 * has activated or desactivated a PDN connection
 */
typedef struct {
  uint8_t cid;    /* PDN connection identifier  */
  network_pdn_state_t status; /* PDN connection status  */
} user_ind_pdn_t;

/*
 * Structure of asynchronous notification received by the user
 */
typedef struct {
  union {
    user_ind_reg_t reg; /* Registration notification  */
    user_ind_loc_t loc; /* Location notification  */
    user_ind_pdn_t pdn; /* PDN connection notification  */
  } notification;
} user_indication_t;

/*
 * Type of procedure executed upon receiving registered notification
 */
typedef int (*user_ind_callback_t) (user_api_id_t *user_api_id, unsigned char, const void*, size_t);

/****************************************************************************/
/************************  G L O B A L    T Y P E S  ************************/
/****************************************************************************/

/****************************************************************************/
/********************  G L O B A L    V A R I A B L E S  ********************/
/****************************************************************************/

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

int user_ind_register(user_ind_t ind, unsigned char id, user_ind_callback_t cb);
int user_ind_deregister(user_ind_t ind);
int user_ind_notify(user_api_id_t *user_api_id, user_ind_t ind, const void* data, size_t size);

#endif /* __USER_IND_H__*/