2019-06-23 11:43:23 +00:00
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/*
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* Copyright (C) 2019 by Sukchan Lee <acetcom@gmail.com>
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*
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* This file is part of Open5GS.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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2019-06-11 09:28:25 +00:00
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#include "nas/nas-message.h"
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2017-03-27 10:32:24 +00:00
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2019-06-11 13:10:47 +00:00
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#include "mme-context.h"
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#include "nas-path.h"
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2019-06-22 02:16:22 +00:00
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#include "sgsap-path.h"
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2019-06-11 13:10:47 +00:00
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#include "mme-gtp-path.h"
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2017-09-07 06:56:31 +00:00
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2019-06-11 13:10:47 +00:00
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#include "esm-build.h"
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2017-04-08 02:38:09 +00:00
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2019-04-27 14:54:30 +00:00
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#undef OGS_LOG_DOMAIN
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#define OGS_LOG_DOMAIN __esm_log_domain
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int esm_handle_pdn_connectivity_request(mme_bearer_t *bearer,
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2017-04-08 02:38:09 +00:00
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nas_pdn_connectivity_request_t *pdn_connectivity_request)
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{
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2019-04-27 14:54:30 +00:00
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int rv;
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2017-09-06 15:37:16 +00:00
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mme_ue_t *mme_ue = NULL;
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2017-09-08 07:46:37 +00:00
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mme_sess_t *sess = NULL;
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2019-04-27 14:54:30 +00:00
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uint8_t security_protected_required = 0;
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2017-09-06 15:37:16 +00:00
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2019-04-27 14:54:30 +00:00
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ogs_assert(bearer);
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2017-09-08 07:46:37 +00:00
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sess = bearer->sess;
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2019-04-27 14:54:30 +00:00
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ogs_assert(sess);
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2017-09-06 15:37:16 +00:00
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mme_ue = sess->mme_ue;
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2019-04-27 14:54:30 +00:00
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ogs_assert(mme_ue);
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2017-12-14 12:42:19 +00:00
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2019-04-27 14:54:30 +00:00
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ogs_assert(pdn_connectivity_request);
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2017-09-06 15:37:16 +00:00
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2019-04-27 14:54:30 +00:00
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ogs_assert(MME_UE_HAVE_IMSI(mme_ue));
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ogs_assert(SECURITY_CONTEXT_IS_VALID(mme_ue));
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2017-09-08 07:46:37 +00:00
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2017-12-14 12:42:19 +00:00
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memcpy(&sess->request_type, &pdn_connectivity_request->request_type,
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sizeof(sess->request_type));
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2017-09-23 15:59:51 +00:00
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security_protected_required = 0;
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if (pdn_connectivity_request->presencemask &
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2019-06-23 11:43:23 +00:00
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NAS_PDN_CONNECTIVITY_REQUEST_ESM_INFORMATION_TRANSFER_FLAG_PRESENT) {
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2017-09-23 15:59:51 +00:00
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nas_esm_information_transfer_flag_t *esm_information_transfer_flag =
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&pdn_connectivity_request->esm_information_transfer_flag;
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security_protected_required =
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esm_information_transfer_flag->security_protected_required;
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2019-04-27 14:54:30 +00:00
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ogs_debug(" EIT(ESM information transfer)[%d]",
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2018-01-22 14:14:20 +00:00
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security_protected_required);
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2017-09-23 15:59:51 +00:00
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}
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2017-09-06 15:37:16 +00:00
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if (pdn_connectivity_request->presencemask &
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2019-06-23 11:43:23 +00:00
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NAS_PDN_CONNECTIVITY_REQUEST_ACCESS_POINT_NAME_PRESENT) {
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2017-09-06 15:37:16 +00:00
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sess->pdn = mme_pdn_find_by_apn(mme_ue,
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2017-09-23 15:59:51 +00:00
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pdn_connectivity_request->access_point_name.apn);
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2019-06-23 11:43:23 +00:00
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if (!sess->pdn) {
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2017-12-19 08:05:54 +00:00
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/* Invalid APN */
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rv = nas_send_pdn_connectivity_reject(
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sess, ESM_CAUSE_MISSING_OR_UNKNOWN_APN);
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2019-04-27 14:54:30 +00:00
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ogs_assert(rv == OGS_OK);
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2017-12-19 08:05:54 +00:00
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2019-04-27 14:54:30 +00:00
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return OGS_ERROR;
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2017-12-19 08:05:54 +00:00
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}
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2017-09-06 15:37:16 +00:00
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}
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2017-08-26 09:52:06 +00:00
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2017-04-14 02:51:27 +00:00
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if (pdn_connectivity_request->presencemask &
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2019-06-23 11:43:23 +00:00
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NAS_PDN_CONNECTIVITY_REQUEST_PROTOCOL_CONFIGURATION_OPTIONS_PRESENT) {
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2017-04-14 02:51:27 +00:00
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nas_protocol_configuration_options_t *protocol_configuration_options =
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&pdn_connectivity_request->protocol_configuration_options;
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2017-09-06 11:29:55 +00:00
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NAS_STORE_DATA(&sess->ue_pco, protocol_configuration_options);
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2017-04-14 02:51:27 +00:00
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}
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2017-09-08 07:46:37 +00:00
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2019-06-23 11:43:23 +00:00
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if (security_protected_required) {
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2017-09-23 15:59:51 +00:00
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rv = nas_send_esm_information_request(bearer);
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2019-04-27 14:54:30 +00:00
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ogs_assert(rv == OGS_OK);
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2017-12-19 08:05:54 +00:00
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2019-04-27 14:54:30 +00:00
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return OGS_OK;
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2017-12-19 08:05:54 +00:00
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}
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2019-06-23 11:43:23 +00:00
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if (!sess->pdn) {
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2017-12-19 08:05:54 +00:00
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/* Default APN */
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sess->pdn = mme_default_pdn(mme_ue);
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}
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2019-06-23 11:43:23 +00:00
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if (sess->pdn) {
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2019-04-27 14:54:30 +00:00
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ogs_debug(" APN[%s]", sess->pdn->apn);
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2017-12-19 08:05:54 +00:00
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rv = mme_gtp_send_create_session_request(sess);
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2019-04-27 14:54:30 +00:00
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ogs_assert(rv == OGS_OK);
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2019-06-23 11:43:23 +00:00
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} else {
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2017-12-19 08:05:54 +00:00
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rv = nas_send_pdn_connectivity_reject(
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sess, ESM_CAUSE_MISSING_OR_UNKNOWN_APN);
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2019-04-27 14:54:30 +00:00
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ogs_assert(rv == OGS_OK);
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2017-09-23 15:59:51 +00:00
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2019-04-27 14:54:30 +00:00
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return OGS_ERROR;
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2017-09-08 07:46:37 +00:00
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}
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2017-09-23 15:59:51 +00:00
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2019-04-27 14:54:30 +00:00
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return OGS_OK;
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2017-04-08 02:38:09 +00:00
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}
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2017-04-11 06:07:46 +00:00
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2019-04-27 14:54:30 +00:00
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int esm_handle_information_response(mme_sess_t *sess,
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2017-04-11 06:07:46 +00:00
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nas_esm_information_response_t *esm_information_response)
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{
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2019-04-27 14:54:30 +00:00
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int rv;
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2017-04-28 07:11:45 +00:00
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mme_ue_t *mme_ue = NULL;
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2017-04-11 06:13:30 +00:00
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2019-04-27 14:54:30 +00:00
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ogs_assert(sess);
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2017-08-26 09:52:06 +00:00
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mme_ue = sess->mme_ue;
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2019-04-27 14:54:30 +00:00
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ogs_assert(mme_ue);
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2017-04-12 04:45:57 +00:00
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2017-04-11 12:38:24 +00:00
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if (esm_information_response->presencemask &
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2019-06-23 11:43:23 +00:00
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NAS_ESM_INFORMATION_RESPONSE_ACCESS_POINT_NAME_PRESENT) {
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2017-08-11 11:25:52 +00:00
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sess->pdn = mme_pdn_find_by_apn(mme_ue,
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2017-04-11 12:38:24 +00:00
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esm_information_response->access_point_name.apn);
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}
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2017-04-11 14:25:33 +00:00
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if (esm_information_response->presencemask &
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2019-06-23 11:43:23 +00:00
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NAS_ESM_INFORMATION_RESPONSE_PROTOCOL_CONFIGURATION_OPTIONS_PRESENT) {
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2017-04-11 14:25:33 +00:00
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nas_protocol_configuration_options_t *protocol_configuration_options =
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&esm_information_response->protocol_configuration_options;
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2017-09-06 11:29:55 +00:00
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NAS_STORE_DATA(&sess->ue_pco, protocol_configuration_options);
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2017-04-11 14:25:33 +00:00
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}
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2017-09-08 07:46:37 +00:00
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2019-06-23 11:43:23 +00:00
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if (sess->pdn) {
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2019-04-27 14:54:30 +00:00
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ogs_debug(" APN[%s]", sess->pdn->apn);
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2019-06-23 11:43:23 +00:00
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if (SESSION_CONTEXT_IS_AVAILABLE(mme_ue)) {
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2019-06-22 02:16:22 +00:00
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mme_vlr_t *vlr = mme_vlr_find_by_tai(&mme_ue->tai);
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mme_ue->vlr = vlr;
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2019-07-20 13:30:53 +00:00
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if (vlr) {
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2019-06-22 02:16:22 +00:00
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sgsap_send_location_update_request(mme_ue);
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2019-07-20 13:30:53 +00:00
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} else {
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CLEAR_MME_UE_TIMER(mme_ue->t3450);
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2019-06-22 02:16:22 +00:00
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nas_send_attach_accept(mme_ue);
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2019-07-20 13:30:53 +00:00
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}
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2019-06-23 11:43:23 +00:00
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} else {
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2017-09-23 15:59:51 +00:00
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rv = mme_gtp_send_create_session_request(sess);
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2019-04-27 14:54:30 +00:00
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ogs_assert(rv == OGS_OK);
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2017-09-23 15:59:51 +00:00
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}
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2019-06-23 11:43:23 +00:00
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} else {
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2017-09-23 15:59:51 +00:00
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rv = nas_send_pdn_connectivity_reject(
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sess, ESM_CAUSE_MISSING_OR_UNKNOWN_APN);
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2019-04-27 14:54:30 +00:00
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ogs_assert(rv == OGS_OK);
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2017-09-23 15:59:51 +00:00
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2019-04-27 14:54:30 +00:00
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return OGS_ERROR;
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2017-09-23 15:59:51 +00:00
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}
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2019-04-27 14:54:30 +00:00
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return OGS_OK;
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2017-04-11 06:07:46 +00:00
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}
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