openairinterface5g/openair-cn/MME_APP/mme_app_location.c

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

This program is free software; you can redistribute it and/or modify it
under the terms and conditions of the GNU General Public License,
version 2, as published by the Free Software Foundation.

This program is distributed in the hope 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
this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

The full GNU General Public License is included in this distribution in
the file called "COPYING".

Contact Information
Openair Admin: openair_admin@eurecom.fr
Openair Tech : openair_tech@eurecom.fr
Forums       : http://forums.eurecom.fsr/openairinterface
Address      : EURECOM,
               Campus SophiaTech,
               450 Route des Chappes,
               CS 50193
               06904 Biot Sophia Antipolis cedex,
               FRANCE
*******************************************************************************/
/*! \file mme_app_location.c
 * \brief
 * \author Sebastien ROUX, Lionel GAUTHIER
 * \version 1.0
 * \company Eurecom
 * \email: lionel.gauthier@eurecom.fr
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "intertask_interface.h"
#include "mme_config.h"

#include "mme_app_extern.h"
#include "mme_app_ue_context.h"
#include "mme_app_defs.h"

#include "secu_defs.h"

#include "assertions.h"
#include "common_types.h"


int
mme_app_send_s6a_update_location_req(
    struct ue_context_s * const ue_context_pP)
{
  struct ue_context_s       *ue_context_p = NULL;
  uint64_t                   imsi         = 0;
  MessageDef                *message_p    = NULL;
  s6a_update_location_req_t *s6a_ulr_p    = NULL;


  MME_APP_STRING_TO_IMSI((char *)ue_context_pP->pending_pdn_connectivity_req_imsi, &imsi);

  MME_APP_DEBUG("Handling imsi %"IMSI_FORMAT"\n", imsi);

  if ((ue_context_p = mme_ue_context_exists_imsi(&mme_app_desc.mme_ue_contexts,
                    imsi)) == NULL) {
      MME_APP_ERROR("That's embarrassing as we don't know this IMSI\n");
      return -1;
  }

  message_p = itti_alloc_new_message(TASK_MME_APP, S6A_UPDATE_LOCATION_REQ);
  if (message_p == NULL) {
      return -1;
  }

  s6a_ulr_p = &message_p->ittiMsg.s6a_update_location_req;
  memset((void*)s6a_ulr_p, 0, sizeof(s6a_update_location_req_t));

  MME_APP_IMSI_TO_STRING(imsi, s6a_ulr_p->imsi);
  s6a_ulr_p->imsi_length         = strlen(s6a_ulr_p->imsi);
  s6a_ulr_p->initial_attach      = INITIAL_ATTACH;
  memcpy(&s6a_ulr_p->visited_plmn, &ue_context_p->guti.gummei.plmn, sizeof(plmn_t));
  s6a_ulr_p->rat_type            = RAT_EUTRAN;
  /* Check if we already have UE data */
  s6a_ulr_p->skip_subscriber_data = 0;

  return itti_send_msg_to_task(TASK_S6A, INSTANCE_DEFAULT, message_p);
}



int
mme_app_handle_s6a_update_location_ans(
        const s6a_update_location_ans_t * const ula_pP)
{
    uint64_t                    imsi              = 0;
    struct ue_context_s        *ue_context_p      = NULL;

    DevAssert(ula_pP != NULL);


    if (ula_pP->result.present == S6A_RESULT_BASE) {
        if (ula_pP->result.choice.base != DIAMETER_SUCCESS) {
            /* The update location procedure has failed. Notify the NAS layer
             * and don't initiate the bearer creation on S-GW side.
             */
            DevMessage("ULR/ULA procedure returned non success\n");
        }
    } else {
        /* The update location procedure has failed. Notify the NAS layer
         * and don't initiate the bearer creation on S-GW side.
         */
        DevMessage("ULR/ULA procedure returned non success\n");
    }

    MME_APP_STRING_TO_IMSI((char *)ula_pP->imsi, &imsi);

    MME_APP_DEBUG("%s Handling imsi %"IMSI_FORMAT"\n", __FUNCTION__, imsi);

    if ((ue_context_p = mme_ue_context_exists_imsi(&mme_app_desc.mme_ue_contexts, imsi)) == NULL) {
        MME_APP_ERROR("That's embarrassing as we don't know this IMSI\n");
        return -1;
    }

    ue_context_p->subscription_known = SUBSCRIPTION_KNOWN;

    ue_context_p->sub_status = ula_pP->subscription_data.subscriber_status;
    ue_context_p->access_restriction_data = ula_pP->subscription_data.access_restriction;

    /* Copy the subscribed ambr to the sgw create session request message */
    memcpy(&ue_context_p->subscribed_ambr, &ula_pP->subscription_data.subscribed_ambr,
           sizeof(ambr_t));
    memcpy(
            ue_context_p->msisdn,
            ula_pP->subscription_data.msisdn,
            ula_pP->subscription_data.msisdn_length);
    ue_context_p->msisdn_length = ula_pP->subscription_data.msisdn_length;
    AssertFatal(ula_pP->subscription_data.msisdn_length != 0, "MSISDN LENGTH IS 0");
    AssertFatal(ula_pP->subscription_data.msisdn_length <= MSISDN_LENGTH, "MSISDN LENGTH is too high %u", MSISDN_LENGTH);
    ue_context_p->msisdn[ue_context_p->msisdn_length] = '\0';

    ue_context_p->rau_tau_timer = ula_pP->subscription_data.rau_tau_timer;
    ue_context_p->access_mode   = ula_pP->subscription_data.access_mode;

    memcpy(&ue_context_p->apn_profile, &ula_pP->subscription_data.apn_config_profile,
           sizeof(apn_config_profile_t));

    return mme_app_send_s11_create_session_req(ue_context_p);
}