forked from acouzens/open5gs
147 lines
5.3 KiB
C
147 lines
5.3 KiB
C
/*
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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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#include "s1ap-path.h"
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#include "nas-path.h"
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#include "mme-gtp-path.h"
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#include "mme-path.h"
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void mme_send_delete_session_or_detach(mme_ue_t *mme_ue)
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{
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ogs_assert(mme_ue);
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if (SESSION_CONTEXT_IS_AVAILABLE(mme_ue)) {
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mme_gtp_send_delete_all_sessions(mme_ue,
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OGS_GTP_DELETE_SEND_DETACH_ACCEPT);
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} else {
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ogs_assert(OGS_OK ==
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nas_eps_send_detach_accept(mme_ue));
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}
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}
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void mme_send_delete_session_or_mme_ue_context_release(mme_ue_t *mme_ue)
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{
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ogs_assert(mme_ue);
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if (SESSION_CONTEXT_IS_AVAILABLE(mme_ue)) {
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mme_gtp_send_delete_all_sessions(mme_ue,
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OGS_GTP_DELETE_SEND_UE_CONTEXT_RELEASE_COMMAND);
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} else {
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enb_ue_t *enb_ue = enb_ue_cycle(mme_ue->enb_ue);
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if (enb_ue) {
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ogs_assert(OGS_OK ==
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s1ap_send_ue_context_release_command(enb_ue,
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S1AP_Cause_PR_nas, S1AP_CauseNas_normal_release,
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S1AP_UE_CTX_REL_UE_CONTEXT_REMOVE, 0));
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} else {
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ogs_warn("[%s] No S1 Context", mme_ue->imsi_bcd);
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}
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}
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}
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void mme_send_release_access_bearer_or_ue_context_release(enb_ue_t *enb_ue)
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{
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mme_ue_t *mme_ue = NULL;
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ogs_assert(enb_ue);
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mme_ue = enb_ue->mme_ue;
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if (mme_ue) {
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ogs_debug("[%s] Release access bearer request", mme_ue->imsi_bcd);
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ogs_assert(OGS_OK ==
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mme_gtp_send_release_access_bearers_request(
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mme_ue, OGS_GTP_RELEASE_SEND_UE_CONTEXT_RELEASE_COMMAND));
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} else {
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ogs_debug("No UE Context");
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ogs_assert(OGS_OK ==
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s1ap_send_ue_context_release_command(enb_ue,
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S1AP_Cause_PR_nas, S1AP_CauseNas_normal_release,
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S1AP_UE_CTX_REL_S1_CONTEXT_REMOVE, 0));
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}
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}
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void mme_send_after_paging(mme_ue_t *mme_ue, uint8_t cause_value)
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{
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mme_sess_t *sess = NULL;
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mme_bearer_t *bearer = NULL;
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ogs_assert(mme_ue);
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ogs_list_for_each(&mme_ue->sess_list, sess) {
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ogs_list_for_each(&sess->bearer_list, bearer) {
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ogs_gtp_xact_t *xact = NULL;
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uint8_t type;
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xact = ogs_gtp_xact_cycle(bearer->current.xact);
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if (xact) {
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/*
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* It may conflict with GTP transaction already used.
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* To avoid this, check `xact->step` to see if
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* the transaction has already been committed.
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*/
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type = xact->seq[xact->step-1].type;
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switch (type) {
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case OGS_GTP2_DOWNLINK_DATA_NOTIFICATION_TYPE:
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ogs_assert(OGS_OK ==
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mme_gtp_send_downlink_data_notification_ack(
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bearer, cause_value));
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break;
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case OGS_GTP2_CREATE_BEARER_REQUEST_TYPE:
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if (cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
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ogs_assert(OGS_OK ==
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nas_eps_send_activate_dedicated_bearer_context_request(
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bearer));
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} else {
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ogs_assert(OGS_OK ==
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mme_gtp_send_create_bearer_response(
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bearer, cause_value));
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}
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break;
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case OGS_GTP2_UPDATE_BEARER_REQUEST_TYPE:
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if (cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
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ogs_assert(OGS_OK ==
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nas_eps_send_modify_bearer_context_request(bearer,
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(xact->update_flags &
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OGS_GTP_MODIFY_QOS_UPDATE) ? 1 : 0,
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(xact->update_flags &
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OGS_GTP_MODIFY_TFT_UPDATE) ? 1 : 0));
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} else {
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ogs_assert(OGS_OK ==
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mme_gtp_send_update_bearer_response(
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bearer, cause_value));
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}
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break;
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case OGS_GTP2_DELETE_BEARER_REQUEST_TYPE:
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if (cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
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ogs_assert(OGS_OK ==
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nas_eps_send_deactivate_bearer_context_request(bearer));
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} else {
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ogs_assert(OGS_OK ==
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mme_gtp_send_delete_bearer_response(
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bearer, cause_value));
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}
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break;
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default:
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break;
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}
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}
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}
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}
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}
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