2019-06-23 11:43:23 +00:00
|
|
|
/*
|
|
|
|
* Copyright (C) 2019 by Sukchan Lee <acetcom@gmail.com>
|
|
|
|
*
|
|
|
|
* This file is part of Open5GS.
|
|
|
|
*
|
|
|
|
* This program is free software: you can redistribute it and/or modify
|
|
|
|
* it under the terms of the GNU Affero General Public License as published by
|
|
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
|
|
* (at your option) any later version.
|
|
|
|
*
|
|
|
|
* This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
*/
|
|
|
|
|
2019-06-11 13:10:47 +00:00
|
|
|
#include "mme-event.h"
|
2019-07-20 04:07:40 +00:00
|
|
|
#include "mme-timer.h"
|
2019-06-11 13:10:47 +00:00
|
|
|
#include "s1ap-handler.h"
|
|
|
|
#include "mme-fd-path.h"
|
|
|
|
#include "emm-handler.h"
|
|
|
|
#include "emm-build.h"
|
|
|
|
#include "esm-handler.h"
|
|
|
|
#include "nas-path.h"
|
2019-07-21 02:42:12 +00:00
|
|
|
#include "nas-security.h"
|
2019-06-01 09:52:38 +00:00
|
|
|
#include "s1ap-path.h"
|
2019-07-09 00:27:45 +00:00
|
|
|
#include "sgsap-types.h"
|
2019-07-05 09:13:32 +00:00
|
|
|
#include "sgsap-path.h"
|
2019-06-11 13:10:47 +00:00
|
|
|
#include "mme-gtp-path.h"
|
|
|
|
#include "mme-path.h"
|
|
|
|
#include "mme-sm.h"
|
2017-03-06 00:00:37 +00:00
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
#undef OGS_LOG_DOMAIN
|
|
|
|
#define OGS_LOG_DOMAIN __emm_log_domain
|
|
|
|
|
|
|
|
void emm_state_initial(ogs_fsm_t *s, mme_event_t *e)
|
2017-03-05 07:49:57 +00:00
|
|
|
{
|
2019-04-27 14:54:30 +00:00
|
|
|
ogs_assert(s);
|
2017-03-05 07:49:57 +00:00
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
mme_sm_debug(e);
|
2017-03-05 07:49:57 +00:00
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_de_registered);
|
2017-03-05 07:49:57 +00:00
|
|
|
}
|
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
void emm_state_final(ogs_fsm_t *s, mme_event_t *e)
|
2017-03-05 07:49:57 +00:00
|
|
|
{
|
2019-04-27 14:54:30 +00:00
|
|
|
ogs_assert(s);
|
2017-03-05 07:49:57 +00:00
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
mme_sm_debug(e);
|
2017-03-05 07:49:57 +00:00
|
|
|
}
|
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
static void common_register_state(ogs_fsm_t *s, mme_event_t *e);
|
2018-01-22 07:35:12 +00:00
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
void emm_state_de_registered(ogs_fsm_t *s, mme_event_t *e)
|
2017-03-05 07:49:57 +00:00
|
|
|
{
|
2019-07-20 13:30:53 +00:00
|
|
|
mme_ue_t *mme_ue = NULL;
|
2019-04-27 14:54:30 +00:00
|
|
|
ogs_assert(s);
|
|
|
|
ogs_assert(e);
|
2017-09-03 15:06:39 +00:00
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
mme_sm_debug(e);
|
2018-01-22 07:35:12 +00:00
|
|
|
|
2019-07-20 13:30:53 +00:00
|
|
|
mme_ue = e->mme_ue;
|
|
|
|
ogs_assert(mme_ue);
|
|
|
|
|
|
|
|
switch (e->id) {
|
|
|
|
case OGS_FSM_ENTRY_SIG:
|
2019-07-20 14:06:54 +00:00
|
|
|
CLEAR_SERVICE_INDICATOR(mme_ue);
|
2019-07-20 13:30:53 +00:00
|
|
|
CLEAR_MME_UE_ALL_TIMERS(mme_ue);
|
|
|
|
break;
|
|
|
|
case OGS_FSM_EXIT_SIG:
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2018-01-23 08:18:18 +00:00
|
|
|
common_register_state(s, e);
|
2018-01-22 07:35:12 +00:00
|
|
|
}
|
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
void emm_state_registered(ogs_fsm_t *s, mme_event_t *e)
|
2018-01-22 07:35:12 +00:00
|
|
|
{
|
2019-04-27 14:54:30 +00:00
|
|
|
ogs_assert(s);
|
|
|
|
ogs_assert(e);
|
2017-03-05 07:49:57 +00:00
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
mme_sm_debug(e);
|
2017-03-05 07:49:57 +00:00
|
|
|
|
2018-01-23 08:18:18 +00:00
|
|
|
common_register_state(s, e);
|
2018-01-22 07:35:12 +00:00
|
|
|
}
|
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
static void common_register_state(ogs_fsm_t *s, mme_event_t *e)
|
2018-01-22 07:35:12 +00:00
|
|
|
{
|
2019-04-27 14:54:30 +00:00
|
|
|
int rv;
|
2018-01-22 07:53:47 +00:00
|
|
|
|
|
|
|
mme_ue_t *mme_ue = NULL;
|
2018-02-03 13:55:05 +00:00
|
|
|
enb_ue_t *enb_ue = NULL;
|
2020-05-23 02:24:48 +00:00
|
|
|
ogs_nas_eps_message_t *message = NULL;
|
2020-08-22 03:33:45 +00:00
|
|
|
ogs_nas_security_header_type_t h;
|
2019-04-27 14:54:30 +00:00
|
|
|
|
|
|
|
ogs_assert(e);
|
2018-01-22 07:53:47 +00:00
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
mme_ue = e->mme_ue;
|
|
|
|
ogs_assert(mme_ue);
|
2017-09-03 15:06:39 +00:00
|
|
|
|
2019-06-23 11:43:23 +00:00
|
|
|
switch (e->id) {
|
|
|
|
case OGS_FSM_ENTRY_SIG:
|
2020-09-22 17:27:58 +00:00
|
|
|
break;
|
2019-06-23 11:43:23 +00:00
|
|
|
case OGS_FSM_EXIT_SIG:
|
2020-09-22 17:27:58 +00:00
|
|
|
break;
|
|
|
|
|
2019-06-23 11:43:23 +00:00
|
|
|
case MME_EVT_EMM_MESSAGE:
|
|
|
|
message = e->nas_message;
|
|
|
|
ogs_assert(message);
|
|
|
|
|
2020-10-29 02:59:27 +00:00
|
|
|
enb_ue = enb_ue_cycle(mme_ue->enb_ue);
|
2019-06-23 11:43:23 +00:00
|
|
|
ogs_assert(enb_ue);
|
|
|
|
|
2020-08-22 03:33:45 +00:00
|
|
|
h.type = e->nas_type;
|
|
|
|
|
2019-06-23 11:43:23 +00:00
|
|
|
if (message->emm.h.security_header_type
|
2019-09-13 12:07:47 +00:00
|
|
|
== OGS_NAS_SECURITY_HEADER_FOR_SERVICE_REQUEST_MESSAGE) {
|
2021-04-23 06:16:18 +00:00
|
|
|
ogs_info("[%s] Service request", mme_ue->imsi_bcd);
|
2019-06-23 11:43:23 +00:00
|
|
|
rv = emm_handle_service_request(
|
|
|
|
mme_ue, &message->emm.service_request);
|
|
|
|
if (rv != OGS_OK) {
|
|
|
|
ogs_error("emm_handle_service_request() failed");
|
|
|
|
OGS_FSM_TRAN(s, emm_state_exception);
|
2020-07-01 04:22:55 +00:00
|
|
|
break;
|
2019-06-23 11:43:23 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if (!MME_UE_HAVE_IMSI(mme_ue)) {
|
2020-10-01 17:27:58 +00:00
|
|
|
ogs_info("Service request : Unknown UE");
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_service_reject(mme_ue,
|
|
|
|
EMM_CAUSE_UE_IDENTITY_CANNOT_BE_DERIVED_BY_THE_NETWORK));
|
2019-06-23 11:43:23 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
2020-07-01 04:22:55 +00:00
|
|
|
break;
|
2019-06-23 11:43:23 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if (!SECURITY_CONTEXT_IS_VALID(mme_ue)) {
|
|
|
|
ogs_warn("No Security Context : IMSI[%s]", mme_ue->imsi_bcd);
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_service_reject(mme_ue,
|
|
|
|
EMM_CAUSE_UE_IDENTITY_CANNOT_BE_DERIVED_BY_THE_NETWORK));
|
2019-06-24 00:44:05 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
2020-07-01 04:22:55 +00:00
|
|
|
break;
|
2019-06-23 11:43:23 +00:00
|
|
|
}
|
|
|
|
|
2020-03-25 18:02:06 +00:00
|
|
|
if (!SESSION_CONTEXT_IS_AVAILABLE(mme_ue)) {
|
|
|
|
ogs_warn("No Session Context : IMSI[%s]", mme_ue->imsi_bcd);
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_service_reject(mme_ue,
|
|
|
|
EMM_CAUSE_UE_IDENTITY_CANNOT_BE_DERIVED_BY_THE_NETWORK));
|
2020-03-25 18:02:06 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
2020-07-01 04:22:55 +00:00
|
|
|
break;
|
2020-03-25 18:02:06 +00:00
|
|
|
}
|
|
|
|
|
2020-11-07 22:27:12 +00:00
|
|
|
if (!ACTIVE_EPS_BEARERS_IS_AVAIABLE(mme_ue)) {
|
|
|
|
ogs_warn("No active EPS bearers : IMSI[%s]", mme_ue->imsi_bcd);
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_service_reject(mme_ue,
|
|
|
|
EMM_CAUSE_NO_EPS_BEARER_CONTEXT_ACTIVATED));
|
2020-11-07 22:27:12 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
s1ap_send_initial_context_setup_request(mme_ue));
|
2020-09-21 18:37:17 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_registered);
|
2020-07-01 04:22:55 +00:00
|
|
|
break;
|
2017-03-05 07:49:57 +00:00
|
|
|
}
|
2017-03-05 08:36:16 +00:00
|
|
|
|
2019-06-23 11:43:23 +00:00
|
|
|
switch (message->emm.h.message_type) {
|
2020-05-23 02:24:48 +00:00
|
|
|
case OGS_NAS_EPS_IDENTITY_RESPONSE:
|
2021-01-05 04:24:22 +00:00
|
|
|
ogs_info("Identity response");
|
2019-07-20 12:49:47 +00:00
|
|
|
CLEAR_MME_UE_TIMER(mme_ue->t3470);
|
|
|
|
|
2019-06-23 11:43:23 +00:00
|
|
|
rv = emm_handle_identity_response(mme_ue,
|
|
|
|
&message->emm.identity_response);
|
|
|
|
if (rv != OGS_OK) {
|
|
|
|
ogs_error("emm_handle_identity_response() failed");
|
|
|
|
OGS_FSM_TRAN(s, emm_state_exception);
|
2020-07-01 04:22:55 +00:00
|
|
|
break;
|
2019-06-23 11:43:23 +00:00
|
|
|
}
|
2018-02-03 13:55:05 +00:00
|
|
|
|
2019-06-23 11:43:23 +00:00
|
|
|
if (!MME_UE_HAVE_IMSI(mme_ue)) {
|
|
|
|
ogs_error("No IMSI");
|
|
|
|
OGS_FSM_TRAN(s, emm_state_exception);
|
2020-07-01 04:22:55 +00:00
|
|
|
break;
|
2019-06-23 11:43:23 +00:00
|
|
|
}
|
|
|
|
|
2020-07-01 04:22:55 +00:00
|
|
|
if (SESSION_CONTEXT_IS_AVAILABLE(mme_ue)) {
|
2020-10-22 21:53:13 +00:00
|
|
|
mme_gtp_send_delete_all_sessions(mme_ue,
|
2020-11-07 22:27:12 +00:00
|
|
|
OGS_GTP_DELETE_SEND_AUTHENTICATION_REQUEST);
|
2020-07-01 04:22:55 +00:00
|
|
|
} else {
|
|
|
|
mme_s6a_send_air(mme_ue, NULL);
|
|
|
|
}
|
|
|
|
OGS_FSM_TRAN(s, &emm_state_authentication);
|
2019-06-23 11:43:23 +00:00
|
|
|
break;
|
2020-07-01 04:22:55 +00:00
|
|
|
|
2020-05-23 02:24:48 +00:00
|
|
|
case OGS_NAS_EPS_ATTACH_REQUEST:
|
2021-03-09 05:28:07 +00:00
|
|
|
ogs_warn("[%s] Attach request", mme_ue->imsi_bcd);
|
2019-06-23 11:43:23 +00:00
|
|
|
rv = emm_handle_attach_request(
|
2020-07-03 05:03:13 +00:00
|
|
|
mme_ue, &message->emm.attach_request, e->pkbuf);
|
2019-06-23 11:43:23 +00:00
|
|
|
if (rv != OGS_OK) {
|
|
|
|
ogs_error("emm_handle_attach_request() failed");
|
|
|
|
OGS_FSM_TRAN(s, emm_state_exception);
|
2020-07-01 04:22:55 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!MME_UE_HAVE_IMSI(mme_ue)) {
|
|
|
|
CLEAR_MME_UE_TIMER(mme_ue->t3470);
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_identity_request(mme_ue));
|
2020-07-01 04:22:55 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2020-08-22 03:33:45 +00:00
|
|
|
if (h.integrity_protected && SECURITY_CONTEXT_IS_VALID(mme_ue)) {
|
2020-10-22 21:53:13 +00:00
|
|
|
if (SESSION_CONTEXT_IS_AVAILABLE(mme_ue)) {
|
|
|
|
mme_gtp_send_delete_all_sessions(mme_ue,
|
|
|
|
OGS_GTP_DELETE_HANDLE_PDN_CONNECTIVITY_REQUEST);
|
2020-07-01 04:22:55 +00:00
|
|
|
} else {
|
2020-10-22 21:53:13 +00:00
|
|
|
rv = nas_eps_send_emm_to_esm(mme_ue,
|
|
|
|
&mme_ue->pdn_connectivity_request);
|
|
|
|
if (rv != OGS_OK) {
|
|
|
|
ogs_error("nas_eps_send_emm_to_esm() failed");
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_attach_reject(mme_ue,
|
|
|
|
EMM_CAUSE_PROTOCOL_ERROR_UNSPECIFIED,
|
|
|
|
ESM_CAUSE_PROTOCOL_ERROR_UNSPECIFIED));
|
2020-10-22 21:53:13 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
|
|
|
break;
|
|
|
|
}
|
2020-07-01 04:22:55 +00:00
|
|
|
}
|
2020-10-22 21:53:13 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_initial_context_setup);
|
2020-07-01 04:22:55 +00:00
|
|
|
} else {
|
|
|
|
if (SESSION_CONTEXT_IS_AVAILABLE(mme_ue)) {
|
2020-10-22 21:53:13 +00:00
|
|
|
mme_gtp_send_delete_all_sessions(mme_ue,
|
2020-11-07 22:27:12 +00:00
|
|
|
OGS_GTP_DELETE_SEND_AUTHENTICATION_REQUEST);
|
2020-07-01 04:22:55 +00:00
|
|
|
} else {
|
|
|
|
mme_s6a_send_air(mme_ue, NULL);
|
|
|
|
}
|
|
|
|
OGS_FSM_TRAN(s, &emm_state_authentication);
|
2019-06-23 11:43:23 +00:00
|
|
|
}
|
|
|
|
break;
|
2020-07-01 04:22:55 +00:00
|
|
|
|
2020-05-23 02:24:48 +00:00
|
|
|
case OGS_NAS_EPS_TRACKING_AREA_UPDATE_REQUEST:
|
2021-04-23 06:16:18 +00:00
|
|
|
ogs_info("[%s] Tracking area update request", mme_ue->imsi_bcd);
|
2020-07-03 05:03:13 +00:00
|
|
|
rv = emm_handle_tau_request(mme_ue,
|
|
|
|
&message->emm.tracking_area_update_request, e->pkbuf);
|
2019-06-23 11:43:23 +00:00
|
|
|
if (rv != OGS_OK) {
|
|
|
|
ogs_error("emm_handle_tau_request() failed");
|
|
|
|
OGS_FSM_TRAN(s, emm_state_exception);
|
2020-07-01 04:22:55 +00:00
|
|
|
break;
|
2019-06-23 11:43:23 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if (!MME_UE_HAVE_IMSI(mme_ue)) {
|
2020-10-01 17:27:58 +00:00
|
|
|
ogs_info("TAU request : Unknown UE");
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_tau_reject(mme_ue,
|
|
|
|
EMM_CAUSE_UE_IDENTITY_CANNOT_BE_DERIVED_BY_THE_NETWORK));
|
2019-06-23 11:43:23 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
2020-07-01 04:22:55 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!SESSION_CONTEXT_IS_AVAILABLE(mme_ue)) {
|
|
|
|
ogs_warn("No PDN Connection : UE[%s]", mme_ue->imsi_bcd);
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_tau_reject(mme_ue,
|
|
|
|
EMM_CAUSE_UE_IDENTITY_CANNOT_BE_DERIVED_BY_THE_NETWORK));
|
2020-07-01 04:22:55 +00:00
|
|
|
OGS_FSM_TRAN(s, emm_state_exception);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2020-11-07 22:27:12 +00:00
|
|
|
if (!ACTIVE_EPS_BEARERS_IS_AVAIABLE(mme_ue)) {
|
|
|
|
ogs_warn("No active EPS bearers : IMSI[%s]", mme_ue->imsi_bcd);
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_tau_reject(mme_ue,
|
|
|
|
EMM_CAUSE_NO_EPS_BEARER_CONTEXT_ACTIVATED));
|
2020-11-07 22:27:12 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2021-03-09 05:28:07 +00:00
|
|
|
if (!h.integrity_protected || !SECURITY_CONTEXT_IS_VALID(mme_ue)) {
|
2020-07-01 04:22:55 +00:00
|
|
|
mme_s6a_send_air(mme_ue, NULL);
|
|
|
|
OGS_FSM_TRAN(&mme_ue->sm, &emm_state_authentication);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2021-04-23 06:16:18 +00:00
|
|
|
/*
|
|
|
|
* <EMM-IDLE State>
|
|
|
|
* 1. InitialUEMessage + Tracking area update request
|
|
|
|
* Active flag : No bearer establishment requested (0)
|
|
|
|
* EPS update type : TA updating (0) or Periodic updating (3)
|
|
|
|
* 2. DownlinkNASTransport + Tracking area update accept
|
|
|
|
* EPS update result value : TA updated (0)
|
|
|
|
* 3. UEContextReleaseCommand
|
|
|
|
* Cause : nas(2) + normal-release(0)
|
|
|
|
* 4. UEContextReleaseComplete
|
|
|
|
*
|
|
|
|
* <EMM-IDLE State>
|
|
|
|
* 1. InitialUEMessage + Tracking area update request
|
|
|
|
* Active flag : bearer establishment requested (1)
|
|
|
|
* EPS update type : Combined TA/LA updating with IMSI attach (2)
|
|
|
|
* 2. InitialContextSetupRequest + Tracking area update accept
|
|
|
|
* EPS update result : Combined TA/LA updated (1)
|
|
|
|
* New GUTI
|
|
|
|
* 3. InitialContextSetupResponse
|
|
|
|
* 4. UplinkNASTransport + Tracking area update complete
|
|
|
|
*
|
|
|
|
* <De-registered State>
|
|
|
|
* 1. S1SetupRequest/S1SetupResponse
|
|
|
|
* 2. InitialUEMessage + Tracking area update request
|
|
|
|
* Active flag : bearer establishment requested (1)
|
|
|
|
* EPS update type : Periodic updating (3)
|
|
|
|
* 3. InitialContextSetupRequest + Tracking area update accept
|
|
|
|
* EPS update result : TA updated (0)
|
|
|
|
* No GUTI
|
|
|
|
* 4. InitialContextSetupResponse
|
|
|
|
*
|
|
|
|
* <Handover>
|
|
|
|
* 1. HandoverNotify (Target)
|
|
|
|
* 2. UplinkNASTransport + Tracking area update request (Target)
|
|
|
|
* Active flag : bearer establishment requested (1)
|
|
|
|
* EPS update type : TA updating (0)
|
|
|
|
* 3. UEContextReleaseCommand (Source)
|
|
|
|
* Cause : radioNetwork(0) + successful-handover(2)
|
|
|
|
* 4. UEcontextReleaseComplete (Source)
|
|
|
|
* 5. DownlinkNASTransport + Tracking area update accept (Target)
|
|
|
|
* EPS update result : TA updated (0)
|
|
|
|
*
|
|
|
|
* <Handover + EMM-Idle State>
|
|
|
|
* 1. HandoverNotify (Target)
|
|
|
|
*
|
|
|
|
* 2. UEContextReleaseCommand (Source)
|
|
|
|
* Cause : radioNetwork(0) + successful-handover(2)
|
|
|
|
* 3. UEcontextReleaseComplete (Source)
|
|
|
|
* 4. UEContextReleaseRequest (Target)
|
|
|
|
* Cause : transport(1) + transport-resource-unavailable(0)
|
|
|
|
* 5. UEContextReleaseCommand (Target)
|
|
|
|
* Cause : nas(2) + normal-release(0)
|
|
|
|
* 6. UEcontextReleaseComplete (Target)
|
|
|
|
*
|
|
|
|
* 7. InitialUEMessage + Tracking area update request (Target)
|
|
|
|
* Active flag : bearer establishment requested (1)
|
|
|
|
* EPS update type : TA updating (0)
|
|
|
|
* 8. InitialContextSetupRequest + Tracking area update accept
|
|
|
|
* EPS update result : TA updated (0)
|
|
|
|
* New GUTI
|
|
|
|
* 9. InitialContextSetupResponse (Target)
|
|
|
|
* EPS update result : TA updated (0)
|
|
|
|
* 10. UplinkNASTransport + Tracking area update complete (Target)
|
|
|
|
*/
|
|
|
|
|
2020-07-01 04:22:55 +00:00
|
|
|
if (e->s1ap_code == S1AP_ProcedureCode_id_initialUEMessage) {
|
|
|
|
ogs_debug(" Iniital UE Message");
|
|
|
|
if (mme_ue->nas_eps.update.active_flag) {
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_tau_accept(mme_ue,
|
|
|
|
S1AP_ProcedureCode_id_InitialContextSetup));
|
2020-07-01 04:22:55 +00:00
|
|
|
} else {
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_tau_accept(mme_ue,
|
|
|
|
S1AP_ProcedureCode_id_downlinkNASTransport));
|
2020-07-01 04:22:55 +00:00
|
|
|
}
|
|
|
|
} else if (e->s1ap_code ==
|
|
|
|
S1AP_ProcedureCode_id_uplinkNASTransport) {
|
|
|
|
ogs_debug(" Uplink NAS Transport");
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_tau_accept(mme_ue,
|
|
|
|
S1AP_ProcedureCode_id_downlinkNASTransport));
|
2020-07-01 04:22:55 +00:00
|
|
|
} else {
|
|
|
|
ogs_fatal("Invalid Procedure Code[%d]", (int)e->s1ap_code);
|
2017-09-08 22:56:42 +00:00
|
|
|
}
|
|
|
|
|
2021-04-23 06:16:18 +00:00
|
|
|
if (!mme_ue->nas_eps.update.active_flag)
|
|
|
|
mme_send_release_access_bearer_or_ue_context_release(enb_ue);
|
2020-07-01 04:22:55 +00:00
|
|
|
|
2021-04-13 08:34:25 +00:00
|
|
|
if (mme_ue->next.m_tmsi) {
|
2021-04-23 06:16:18 +00:00
|
|
|
ogs_fatal("MME does not create new GUTI");
|
|
|
|
ogs_assert_if_reached();
|
|
|
|
OGS_FSM_TRAN(s, &emm_state_initial_context_setup);
|
2021-04-13 08:34:25 +00:00
|
|
|
} else {
|
2021-04-23 06:16:18 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_registered);
|
2021-04-13 08:34:25 +00:00
|
|
|
}
|
2020-07-01 04:22:55 +00:00
|
|
|
break;
|
|
|
|
|
2020-05-23 02:24:48 +00:00
|
|
|
case OGS_NAS_EPS_EXTENDED_SERVICE_REQUEST:
|
2021-04-23 06:16:18 +00:00
|
|
|
ogs_info("[%s] Extended service request", mme_ue->imsi_bcd);
|
2019-07-06 13:16:13 +00:00
|
|
|
rv = emm_handle_extended_service_request(
|
|
|
|
mme_ue, &message->emm.extended_service_request);
|
|
|
|
if (rv != OGS_OK) {
|
|
|
|
ogs_error("emm_handle_extended_service_request() failed");
|
|
|
|
OGS_FSM_TRAN(s, emm_state_exception);
|
2020-07-01 04:22:55 +00:00
|
|
|
break;
|
2019-07-06 13:16:13 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if (!MME_UE_HAVE_IMSI(mme_ue)) {
|
2020-10-01 17:27:58 +00:00
|
|
|
ogs_warn("Extended Service request : Unknown UE");
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_service_reject(mme_ue,
|
|
|
|
EMM_CAUSE_UE_IDENTITY_CANNOT_BE_DERIVED_BY_THE_NETWORK));
|
2019-07-06 13:16:13 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
2020-07-01 04:22:55 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!SESSION_CONTEXT_IS_AVAILABLE(mme_ue)) {
|
|
|
|
ogs_warn("No PDN Connection : UE[%s]", mme_ue->imsi_bcd);
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_service_reject(mme_ue,
|
|
|
|
EMM_CAUSE_UE_IDENTITY_CANNOT_BE_DERIVED_BY_THE_NETWORK));
|
2020-07-01 04:22:55 +00:00
|
|
|
OGS_FSM_TRAN(s, emm_state_exception);
|
|
|
|
break;
|
2019-07-06 13:16:13 +00:00
|
|
|
}
|
|
|
|
|
2020-07-01 04:22:55 +00:00
|
|
|
if (!SECURITY_CONTEXT_IS_VALID(mme_ue)) {
|
|
|
|
ogs_warn("No Security Context : IMSI[%s]", mme_ue->imsi_bcd);
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_service_reject(mme_ue,
|
|
|
|
EMM_CAUSE_UE_IDENTITY_CANNOT_BE_DERIVED_BY_THE_NETWORK));
|
2020-07-01 04:22:55 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (e->s1ap_code == S1AP_ProcedureCode_id_initialUEMessage) {
|
|
|
|
ogs_debug(" Initial UE Message");
|
2020-11-03 10:54:12 +00:00
|
|
|
|
|
|
|
if (!MME_P_TMSI_IS_AVAILABLE(mme_ue)) {
|
|
|
|
ogs_warn("No P-TMSI : UE[%s]", mme_ue->imsi_bcd);
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_service_reject(mme_ue,
|
|
|
|
EMM_CAUSE_UE_IDENTITY_CANNOT_BE_DERIVED_BY_THE_NETWORK)
|
|
|
|
);
|
2020-11-03 10:54:12 +00:00
|
|
|
mme_send_release_access_bearer_or_ue_context_release(
|
|
|
|
enb_ue);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2020-07-01 04:22:55 +00:00
|
|
|
if (mme_ue->nas_eps.service.value ==
|
|
|
|
OGS_NAS_SERVICE_TYPE_CS_FALLBACK_FROM_UE ||
|
|
|
|
mme_ue->nas_eps.service.value ==
|
|
|
|
OGS_NAS_SERVICE_TYPE_CS_FALLBACK_EMERGENCY_CALL_FROM_UE) {
|
|
|
|
ogs_debug(" MO-CSFB-INDICATION[%d]",
|
|
|
|
mme_ue->nas_eps.service.value);
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
sgsap_send_mo_csfb_indication(mme_ue));
|
2020-07-01 04:22:55 +00:00
|
|
|
} else if (mme_ue->nas_eps.service.value ==
|
|
|
|
OGS_NAS_SERVICE_TYPE_CS_FALLBACK_TO_UE) {
|
|
|
|
ogs_debug(" SERVICE_REQUEST[%d]",
|
|
|
|
mme_ue->nas_eps.service.value);
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
sgsap_send_service_request(mme_ue, SGSAP_EMM_IDLE_MODE)
|
|
|
|
);
|
2020-07-01 04:22:55 +00:00
|
|
|
} else {
|
|
|
|
ogs_warn(" Unknown CSFB Service Type[%d]",
|
|
|
|
mme_ue->nas_eps.service.value);
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_service_reject(mme_ue,
|
|
|
|
EMM_CAUSE_UE_IDENTITY_CANNOT_BE_DERIVED_BY_THE_NETWORK)
|
|
|
|
);
|
2020-07-01 04:22:55 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
s1ap_send_initial_context_setup_request(mme_ue));
|
2020-07-01 04:22:55 +00:00
|
|
|
|
|
|
|
} else if (e->s1ap_code ==
|
|
|
|
S1AP_ProcedureCode_id_uplinkNASTransport) {
|
|
|
|
ogs_debug(" Uplink NAS Transport");
|
2020-11-03 10:54:12 +00:00
|
|
|
|
|
|
|
if (!MME_P_TMSI_IS_AVAILABLE(mme_ue)) {
|
|
|
|
ogs_warn("No P-TMSI : UE[%s]", mme_ue->imsi_bcd);
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_service_reject(mme_ue,
|
|
|
|
EMM_CAUSE_UE_IDENTITY_CANNOT_BE_DERIVED_BY_THE_NETWORK)
|
|
|
|
);
|
2020-11-03 10:54:12 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2020-07-01 04:22:55 +00:00
|
|
|
if (mme_ue->nas_eps.service.value ==
|
|
|
|
OGS_NAS_SERVICE_TYPE_CS_FALLBACK_FROM_UE ||
|
|
|
|
mme_ue->nas_eps.service.value ==
|
|
|
|
OGS_NAS_SERVICE_TYPE_CS_FALLBACK_EMERGENCY_CALL_FROM_UE) {
|
|
|
|
ogs_debug(" MO-CSFB-INDICATION[%d]",
|
|
|
|
mme_ue->nas_eps.service.value);
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
sgsap_send_mo_csfb_indication(mme_ue));
|
2020-07-01 04:22:55 +00:00
|
|
|
} else if (mme_ue->nas_eps.service.value ==
|
|
|
|
OGS_NAS_SERVICE_TYPE_CS_FALLBACK_TO_UE) {
|
|
|
|
ogs_debug(" SERVICE_REQUEST[%d]",
|
|
|
|
mme_ue->nas_eps.service.value);
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
sgsap_send_service_request(
|
|
|
|
mme_ue, SGSAP_EMM_CONNECTED_MODE));
|
2020-07-01 04:22:55 +00:00
|
|
|
} else {
|
|
|
|
ogs_warn(" Unknown CSFB Service Type[%d]",
|
|
|
|
mme_ue->nas_eps.service.value);
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_service_reject(mme_ue,
|
|
|
|
EMM_CAUSE_UE_IDENTITY_CANNOT_BE_DERIVED_BY_THE_NETWORK)
|
|
|
|
);
|
2020-07-01 04:22:55 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
s1ap_send_ue_context_modification_request(mme_ue));
|
2020-07-01 04:22:55 +00:00
|
|
|
} else {
|
|
|
|
ogs_error("Invalid Procedure Code[%d]", (int)e->s1ap_code);
|
|
|
|
}
|
2019-07-06 13:16:13 +00:00
|
|
|
break;
|
2020-07-01 04:22:55 +00:00
|
|
|
|
2020-05-23 02:24:48 +00:00
|
|
|
case OGS_NAS_EPS_EMM_STATUS:
|
2020-10-01 17:27:58 +00:00
|
|
|
ogs_warn("EMM STATUS : IMSI[%s] Cause[%d]",
|
2019-06-23 11:43:23 +00:00
|
|
|
mme_ue->imsi_bcd,
|
|
|
|
message->emm.emm_status.emm_cause);
|
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
2020-07-01 04:22:55 +00:00
|
|
|
break;
|
|
|
|
|
2020-05-23 02:24:48 +00:00
|
|
|
case OGS_NAS_EPS_DETACH_REQUEST:
|
2021-04-23 06:16:18 +00:00
|
|
|
ogs_info("[%s] Detach request", mme_ue->imsi_bcd);
|
2019-06-23 11:43:23 +00:00
|
|
|
rv = emm_handle_detach_request(
|
|
|
|
mme_ue, &message->emm.detach_request_from_ue);
|
2020-07-01 04:22:55 +00:00
|
|
|
if (rv != OGS_OK) {
|
2020-07-03 05:03:13 +00:00
|
|
|
ogs_error("emm_handle_detach_request() failed");
|
2019-06-23 11:43:23 +00:00
|
|
|
OGS_FSM_TRAN(s, emm_state_exception);
|
2020-07-01 04:22:55 +00:00
|
|
|
break;
|
2017-09-03 15:06:39 +00:00
|
|
|
}
|
2019-06-23 11:43:23 +00:00
|
|
|
|
2019-07-06 14:30:05 +00:00
|
|
|
if (MME_P_TMSI_IS_AVAILABLE(mme_ue)) {
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
sgsap_send_detach_indication(mme_ue));
|
2019-07-05 09:13:32 +00:00
|
|
|
} else {
|
2019-11-15 14:56:55 +00:00
|
|
|
mme_send_delete_session_or_detach(mme_ue);
|
2019-07-05 09:13:32 +00:00
|
|
|
}
|
2019-06-23 11:43:23 +00:00
|
|
|
|
|
|
|
OGS_FSM_TRAN(s, &emm_state_de_registered);
|
2020-07-01 04:22:55 +00:00
|
|
|
break;
|
|
|
|
|
2020-05-23 02:24:48 +00:00
|
|
|
case OGS_NAS_EPS_UPLINK_NAS_TRANSPORT:
|
2020-10-01 17:27:58 +00:00
|
|
|
ogs_debug("Uplink NAS Transport");
|
2019-07-13 02:51:28 +00:00
|
|
|
ogs_debug(" IMSI[%s]", mme_ue->imsi_bcd);
|
|
|
|
if (MME_SGSAP_IS_CONNECTED(mme_ue)) {
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
sgsap_send_uplink_unitdata(mme_ue, &message->emm.
|
|
|
|
uplink_nas_transport.nas_message_container));
|
2019-07-13 02:51:28 +00:00
|
|
|
} else {
|
2019-07-13 05:51:35 +00:00
|
|
|
S1AP_MME_UE_S1AP_ID_t MME_UE_S1AP_ID;
|
|
|
|
S1AP_ENB_UE_S1AP_ID_t ENB_UE_S1AP_ID;
|
|
|
|
|
2019-07-13 02:51:28 +00:00
|
|
|
ogs_warn("No connection of MSC/VLR");
|
2019-07-13 05:51:35 +00:00
|
|
|
MME_UE_S1AP_ID = enb_ue->mme_ue_s1ap_id;
|
|
|
|
ENB_UE_S1AP_ID = enb_ue->enb_ue_s1ap_id;
|
|
|
|
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
s1ap_send_error_indication(enb_ue->enb,
|
2019-07-13 05:51:35 +00:00
|
|
|
&MME_UE_S1AP_ID, &ENB_UE_S1AP_ID,
|
|
|
|
S1AP_Cause_PR_transport,
|
2021-05-16 03:22:10 +00:00
|
|
|
S1AP_CauseTransport_transport_resource_unavailable));
|
2019-07-13 02:51:28 +00:00
|
|
|
}
|
2020-07-01 04:22:55 +00:00
|
|
|
break;
|
2019-07-13 02:51:28 +00:00
|
|
|
|
2020-10-01 17:27:58 +00:00
|
|
|
case OGS_NAS_EPS_ATTACH_COMPLETE:
|
2021-03-09 05:28:07 +00:00
|
|
|
ogs_error("[%s] Attach complete in INVALID-STATE",
|
|
|
|
mme_ue->imsi_bcd);
|
2020-10-01 17:27:58 +00:00
|
|
|
break;
|
|
|
|
|
2021-04-23 06:16:18 +00:00
|
|
|
case OGS_NAS_EPS_TRACKING_AREA_UPDATE_COMPLETE:
|
|
|
|
ogs_error("[%s] Tracking area update complete in INVALID-STATE",
|
|
|
|
mme_ue->imsi_bcd);
|
|
|
|
break;
|
|
|
|
|
2017-09-03 15:06:39 +00:00
|
|
|
default:
|
2019-06-23 11:43:23 +00:00
|
|
|
ogs_warn("Unknown message[%d]", message->emm.h.message_type);
|
2017-09-03 15:06:39 +00:00
|
|
|
}
|
2019-06-23 11:43:23 +00:00
|
|
|
break;
|
2020-07-01 04:22:55 +00:00
|
|
|
|
2019-07-20 04:07:40 +00:00
|
|
|
case MME_EVT_EMM_TIMER:
|
|
|
|
switch (e->timer_id) {
|
|
|
|
case MME_TIMER_T3413:
|
2019-07-20 11:38:03 +00:00
|
|
|
if (mme_ue->t3413.retry_count >=
|
2019-07-20 07:25:09 +00:00
|
|
|
mme_timer_cfg(MME_TIMER_T3413)->max_count) {
|
2019-07-20 04:07:40 +00:00
|
|
|
/* Paging failed */
|
2020-10-01 17:27:58 +00:00
|
|
|
ogs_warn("Paging to IMSI[%s] failed. Stop paging",
|
2019-07-20 04:07:40 +00:00
|
|
|
mme_ue->imsi_bcd);
|
2019-07-20 12:28:36 +00:00
|
|
|
CLEAR_MME_UE_TIMER(mme_ue->t3413);
|
|
|
|
|
2020-11-07 22:27:12 +00:00
|
|
|
mme_send_after_paging(mme_ue, OGS_GTP_CAUSE_UNABLE_TO_PAGE_UE);
|
|
|
|
|
2019-07-21 04:08:21 +00:00
|
|
|
if (CS_CALL_SERVICE_INDICATOR(mme_ue) ||
|
|
|
|
SMS_SERVICE_INDICATOR(mme_ue)) {
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
sgsap_send_ue_unreachable(mme_ue,
|
|
|
|
SGSAP_SGS_CAUSE_UE_UNREACHABLE));
|
2020-11-07 22:27:12 +00:00
|
|
|
|
2019-07-21 04:08:21 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
CLEAR_SERVICE_INDICATOR(mme_ue);
|
2020-07-01 04:22:55 +00:00
|
|
|
|
2019-07-20 04:07:40 +00:00
|
|
|
} else {
|
2019-07-20 11:38:03 +00:00
|
|
|
mme_ue->t3413.retry_count++;
|
2019-07-20 12:28:36 +00:00
|
|
|
/*
|
|
|
|
* If t3413 is timeout, the saved pkbuf is used.
|
|
|
|
* We don't have to set CNDomain.
|
|
|
|
* So, we just set CNDomain to 0
|
|
|
|
*/
|
2021-06-06 13:35:46 +00:00
|
|
|
ogs_assert(OGS_OK == s1ap_send_paging(mme_ue, 0));
|
2019-07-20 04:07:40 +00:00
|
|
|
}
|
|
|
|
break;
|
2020-07-01 04:22:55 +00:00
|
|
|
|
2019-07-20 12:49:47 +00:00
|
|
|
case MME_TIMER_T3470:
|
|
|
|
if (mme_ue->t3470.retry_count >=
|
|
|
|
mme_timer_cfg(MME_TIMER_T3470)->max_count) {
|
2020-10-01 17:27:58 +00:00
|
|
|
ogs_warn("Retransmission of Identity-Request failed. "
|
2019-07-20 12:49:47 +00:00
|
|
|
"Stop retransmission");
|
|
|
|
OGS_FSM_TRAN(&mme_ue->sm, &emm_state_exception);
|
|
|
|
} else {
|
|
|
|
mme_ue->t3470.retry_count++;
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_identity_request(mme_ue));
|
2019-07-20 12:49:47 +00:00
|
|
|
}
|
|
|
|
break;
|
2020-07-01 04:22:55 +00:00
|
|
|
|
2019-07-20 04:07:40 +00:00
|
|
|
default:
|
2019-07-20 06:16:46 +00:00
|
|
|
ogs_error("Unknown timer[%s:%d]",
|
2019-07-20 04:07:40 +00:00
|
|
|
mme_timer_get_name(e->timer_id), e->timer_id);
|
2019-06-23 11:43:23 +00:00
|
|
|
}
|
|
|
|
break;
|
2019-07-06 13:16:13 +00:00
|
|
|
|
2019-06-23 11:43:23 +00:00
|
|
|
default:
|
2020-07-01 04:22:55 +00:00
|
|
|
ogs_error("Unknown event[%s]", mme_event_get_name(e));
|
2017-09-03 15:06:39 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
void emm_state_authentication(ogs_fsm_t *s, mme_event_t *e)
|
2017-09-03 15:06:39 +00:00
|
|
|
{
|
2019-04-27 14:54:30 +00:00
|
|
|
int rv;
|
2017-09-03 15:06:39 +00:00
|
|
|
mme_ue_t *mme_ue = NULL;
|
2020-05-23 02:24:48 +00:00
|
|
|
ogs_nas_eps_message_t *message = NULL;
|
2017-09-03 15:06:39 +00:00
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
ogs_assert(s);
|
|
|
|
ogs_assert(e);
|
|
|
|
|
|
|
|
mme_sm_debug(e);
|
2017-09-03 15:06:39 +00:00
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
mme_ue = e->mme_ue;
|
|
|
|
ogs_assert(mme_ue);
|
2017-09-03 15:06:39 +00:00
|
|
|
|
2019-06-23 11:43:23 +00:00
|
|
|
switch (e->id) {
|
|
|
|
case OGS_FSM_ENTRY_SIG:
|
|
|
|
break;
|
|
|
|
case OGS_FSM_EXIT_SIG:
|
|
|
|
break;
|
|
|
|
case MME_EVT_EMM_MESSAGE:
|
|
|
|
message = e->nas_message;
|
|
|
|
ogs_assert(message);
|
|
|
|
|
|
|
|
switch (message->emm.h.message_type) {
|
2020-05-23 02:24:48 +00:00
|
|
|
case OGS_NAS_EPS_AUTHENTICATION_RESPONSE:
|
2017-09-03 15:06:39 +00:00
|
|
|
{
|
2020-05-23 02:24:48 +00:00
|
|
|
ogs_nas_eps_authentication_response_t *authentication_response =
|
2019-06-23 11:43:23 +00:00
|
|
|
&message->emm.authentication_response;
|
2019-09-13 12:07:47 +00:00
|
|
|
ogs_nas_authentication_response_parameter_t
|
2019-06-23 11:43:23 +00:00
|
|
|
*authentication_response_parameter =
|
|
|
|
&authentication_response->
|
|
|
|
authentication_response_parameter;
|
|
|
|
|
2020-10-01 17:27:58 +00:00
|
|
|
ogs_debug("Authentication response");
|
2019-06-23 11:43:23 +00:00
|
|
|
ogs_debug(" IMSI[%s]", mme_ue->imsi_bcd);
|
|
|
|
|
2019-07-20 12:28:36 +00:00
|
|
|
CLEAR_MME_UE_TIMER(mme_ue->t3460);
|
|
|
|
|
2020-04-03 00:43:22 +00:00
|
|
|
if (authentication_response_parameter->length == 0 ||
|
|
|
|
memcmp(authentication_response_parameter->res,
|
2019-06-23 11:43:23 +00:00
|
|
|
mme_ue->xres,
|
|
|
|
authentication_response_parameter->length) != 0) {
|
|
|
|
ogs_log_hexdump(OGS_LOG_WARN,
|
|
|
|
authentication_response_parameter->res,
|
|
|
|
authentication_response_parameter->length);
|
|
|
|
ogs_log_hexdump(OGS_LOG_WARN,
|
2019-09-13 12:07:47 +00:00
|
|
|
mme_ue->xres, OGS_MAX_RES_LEN);
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_authentication_reject(mme_ue));
|
2019-06-23 11:43:23 +00:00
|
|
|
OGS_FSM_TRAN(&mme_ue->sm, &emm_state_exception);
|
|
|
|
} else {
|
|
|
|
OGS_FSM_TRAN(&mme_ue->sm, &emm_state_security_mode);
|
|
|
|
}
|
2019-07-20 12:28:36 +00:00
|
|
|
|
2017-09-03 15:06:39 +00:00
|
|
|
break;
|
|
|
|
}
|
2020-05-23 02:24:48 +00:00
|
|
|
case OGS_NAS_EPS_AUTHENTICATION_FAILURE:
|
2017-09-03 15:06:39 +00:00
|
|
|
{
|
2020-05-23 02:24:48 +00:00
|
|
|
ogs_nas_eps_authentication_failure_t *authentication_failure =
|
2019-06-23 11:43:23 +00:00
|
|
|
&message->emm.authentication_failure;
|
2019-09-13 12:07:47 +00:00
|
|
|
ogs_nas_authentication_failure_parameter_t
|
2019-06-23 11:43:23 +00:00
|
|
|
*authentication_failure_parameter =
|
|
|
|
&authentication_failure->
|
|
|
|
authentication_failure_parameter;
|
|
|
|
|
2020-10-01 17:27:58 +00:00
|
|
|
ogs_debug("Authentication failure");
|
2019-06-23 11:43:23 +00:00
|
|
|
ogs_debug(" IMSI[%s] EMM_CAUSE[%d]", mme_ue->imsi_bcd,
|
|
|
|
authentication_failure->emm_cause);
|
|
|
|
|
2019-07-20 12:28:36 +00:00
|
|
|
CLEAR_MME_UE_TIMER(mme_ue->t3460);
|
|
|
|
|
2019-06-23 11:43:23 +00:00
|
|
|
switch (authentication_failure->emm_cause) {
|
|
|
|
case EMM_CAUSE_MAC_FAILURE:
|
|
|
|
ogs_warn("Authentication failure(MAC failure)");
|
|
|
|
break;
|
|
|
|
case EMM_CAUSE_NON_EPS_AUTHENTICATION_UNACCEPTABLE:
|
|
|
|
ogs_error("Authentication failure"
|
|
|
|
"(Non-EPS authentication unacceptable)");
|
|
|
|
break;
|
|
|
|
case EMM_CAUSE_SYNCH_FAILURE:
|
2020-09-09 02:16:46 +00:00
|
|
|
ogs_info("Authentication failure(Synch failure)");
|
2019-06-23 11:43:23 +00:00
|
|
|
mme_s6a_send_air(mme_ue,
|
|
|
|
authentication_failure_parameter);
|
|
|
|
return;
|
|
|
|
default:
|
|
|
|
ogs_error("Unknown EMM_CAUSE{%d] in Authentication"
|
|
|
|
" failure",
|
|
|
|
authentication_failure->emm_cause);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_authentication_reject(mme_ue));
|
2019-06-23 11:43:23 +00:00
|
|
|
OGS_FSM_TRAN(&mme_ue->sm, &emm_state_exception);
|
2019-07-20 12:28:36 +00:00
|
|
|
|
2017-09-03 15:06:39 +00:00
|
|
|
break;
|
|
|
|
}
|
2020-05-23 02:24:48 +00:00
|
|
|
case OGS_NAS_EPS_ATTACH_REQUEST:
|
2021-03-09 05:28:07 +00:00
|
|
|
ogs_warn("[%s] Attach request", mme_ue->imsi_bcd);
|
2019-06-23 11:43:23 +00:00
|
|
|
rv = emm_handle_attach_request(
|
2020-07-03 05:03:13 +00:00
|
|
|
mme_ue, &message->emm.attach_request, e->pkbuf);
|
2019-06-23 11:43:23 +00:00
|
|
|
if (rv != OGS_OK) {
|
|
|
|
ogs_error("emm_handle_attach_request() failed");
|
|
|
|
OGS_FSM_TRAN(s, emm_state_exception);
|
2020-09-22 17:27:58 +00:00
|
|
|
break;
|
2019-06-23 11:43:23 +00:00
|
|
|
}
|
2017-09-03 15:06:39 +00:00
|
|
|
|
2019-06-23 11:43:23 +00:00
|
|
|
mme_s6a_send_air(mme_ue, NULL);
|
|
|
|
OGS_FSM_TRAN(s, &emm_state_authentication);
|
|
|
|
break;
|
2020-05-23 02:24:48 +00:00
|
|
|
case OGS_NAS_EPS_EMM_STATUS:
|
2020-10-01 17:27:58 +00:00
|
|
|
ogs_warn("EMM STATUS : IMSI[%s] Cause[%d]",
|
2019-06-23 11:43:23 +00:00
|
|
|
mme_ue->imsi_bcd,
|
|
|
|
message->emm.emm_status.emm_cause);
|
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
|
|
|
break;
|
2020-05-23 02:24:48 +00:00
|
|
|
case OGS_NAS_EPS_DETACH_REQUEST:
|
2021-01-05 04:24:22 +00:00
|
|
|
ogs_warn("Detach request");
|
2019-06-23 11:43:23 +00:00
|
|
|
rv = emm_handle_detach_request(
|
|
|
|
mme_ue, &message->emm.detach_request_from_ue);
|
|
|
|
if (rv != OGS_OK) {
|
2020-07-03 05:03:13 +00:00
|
|
|
ogs_error("emm_handle_detach_request() failed");
|
2019-06-23 11:43:23 +00:00
|
|
|
OGS_FSM_TRAN(s, emm_state_exception);
|
2020-09-22 17:27:58 +00:00
|
|
|
break;
|
2017-09-04 04:04:35 +00:00
|
|
|
}
|
2019-06-23 11:43:23 +00:00
|
|
|
|
2019-11-15 14:56:55 +00:00
|
|
|
mme_send_delete_session_or_detach(mme_ue);
|
2019-06-23 11:43:23 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_de_registered);
|
2017-09-04 04:04:35 +00:00
|
|
|
break;
|
|
|
|
default:
|
2019-06-23 11:43:23 +00:00
|
|
|
ogs_warn("Unknown message[%d]", message->emm.h.message_type);
|
2017-09-04 04:04:35 +00:00
|
|
|
break;
|
|
|
|
}
|
2019-06-23 11:43:23 +00:00
|
|
|
break;
|
2019-07-20 12:28:36 +00:00
|
|
|
case MME_EVT_EMM_TIMER:
|
|
|
|
switch (e->timer_id) {
|
|
|
|
case MME_TIMER_T3460:
|
|
|
|
if (mme_ue->t3460.retry_count >=
|
|
|
|
mme_timer_cfg(MME_TIMER_T3460)->max_count) {
|
2020-10-01 17:27:58 +00:00
|
|
|
ogs_warn("Retransmission of IMSI[%s] failed. "
|
2021-04-23 06:16:18 +00:00
|
|
|
"Stop retransmission", mme_ue->imsi_bcd);
|
2019-07-20 12:49:47 +00:00
|
|
|
OGS_FSM_TRAN(&mme_ue->sm, &emm_state_exception);
|
2019-07-20 12:28:36 +00:00
|
|
|
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_authentication_reject(mme_ue));
|
2019-07-20 12:28:36 +00:00
|
|
|
} else {
|
|
|
|
mme_ue->t3460.retry_count++;
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_authentication_request(mme_ue));
|
2019-07-20 12:28:36 +00:00
|
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
ogs_error("Unknown timer[%s:%d]",
|
|
|
|
mme_timer_get_name(e->timer_id), e->timer_id);
|
|
|
|
break;
|
|
|
|
}
|
2019-07-20 13:30:53 +00:00
|
|
|
break;
|
2019-06-23 11:43:23 +00:00
|
|
|
default:
|
|
|
|
ogs_error("Unknown event[%s]", mme_event_get_name(e));
|
|
|
|
break;
|
2017-09-04 04:04:35 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
void emm_state_security_mode(ogs_fsm_t *s, mme_event_t *e)
|
2017-09-04 04:04:35 +00:00
|
|
|
{
|
2019-04-27 14:54:30 +00:00
|
|
|
int rv;
|
2017-09-04 04:04:35 +00:00
|
|
|
mme_ue_t *mme_ue = NULL;
|
2020-05-23 02:24:48 +00:00
|
|
|
ogs_nas_eps_message_t *message = NULL;
|
|
|
|
ogs_nas_security_header_type_t h;
|
2017-09-04 04:04:35 +00:00
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
ogs_assert(s);
|
|
|
|
ogs_assert(e);
|
2017-09-04 04:04:35 +00:00
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
mme_sm_debug(e);
|
2017-09-04 04:04:35 +00:00
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
mme_ue = e->mme_ue;
|
|
|
|
ogs_assert(mme_ue);
|
2017-09-04 04:04:35 +00:00
|
|
|
|
2019-06-23 11:43:23 +00:00
|
|
|
switch (e->id) {
|
|
|
|
case OGS_FSM_ENTRY_SIG:
|
2019-07-20 12:28:36 +00:00
|
|
|
CLEAR_MME_UE_TIMER(mme_ue->t3460);
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_security_mode_command(mme_ue));
|
2019-06-23 11:43:23 +00:00
|
|
|
break;
|
|
|
|
case OGS_FSM_EXIT_SIG:
|
|
|
|
break;
|
|
|
|
case MME_EVT_EMM_MESSAGE:
|
|
|
|
message = e->nas_message;
|
|
|
|
ogs_assert(message);
|
|
|
|
|
2019-06-23 12:15:59 +00:00
|
|
|
if (message->emm.h.security_header_type
|
2019-09-13 12:07:47 +00:00
|
|
|
== OGS_NAS_SECURITY_HEADER_FOR_SERVICE_REQUEST_MESSAGE) {
|
2020-10-01 17:27:58 +00:00
|
|
|
ogs_debug("Service request");
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_service_reject(mme_ue,
|
|
|
|
EMM_CAUSE_SECURITY_MODE_REJECTED_UNSPECIFIED));
|
2019-06-23 12:15:59 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
2020-09-22 17:27:58 +00:00
|
|
|
break;
|
2019-06-23 12:15:59 +00:00
|
|
|
}
|
|
|
|
|
2019-06-23 11:43:23 +00:00
|
|
|
switch (message->emm.h.message_type) {
|
2020-05-23 02:24:48 +00:00
|
|
|
case OGS_NAS_EPS_SECURITY_MODE_COMPLETE:
|
2020-10-01 17:27:58 +00:00
|
|
|
ogs_debug("Security mode complete");
|
2019-06-23 11:43:23 +00:00
|
|
|
ogs_debug(" IMSI[%s]", mme_ue->imsi_bcd);
|
|
|
|
|
2019-07-20 12:28:36 +00:00
|
|
|
CLEAR_MME_UE_TIMER(mme_ue->t3460);
|
|
|
|
|
2019-07-21 02:42:12 +00:00
|
|
|
/* Now, We will check the MAC in the NAS message*/
|
|
|
|
h.type = e->nas_type;
|
|
|
|
if (h.integrity_protected == 0) {
|
2020-11-08 02:25:53 +00:00
|
|
|
ogs_error("[%s] No Integrity Protected", mme_ue->imsi_bcd);
|
2019-07-21 02:42:12 +00:00
|
|
|
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_attach_reject(mme_ue,
|
|
|
|
EMM_CAUSE_SECURITY_MODE_REJECTED_UNSPECIFIED,
|
|
|
|
ESM_CAUSE_PROTOCOL_ERROR_UNSPECIFIED));
|
2019-07-21 02:42:12 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2019-07-21 06:14:31 +00:00
|
|
|
if (!SECURITY_CONTEXT_IS_VALID(mme_ue)) {
|
2020-11-08 02:25:53 +00:00
|
|
|
ogs_warn("[%s] No Security Context", mme_ue->imsi_bcd);
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_attach_reject(mme_ue,
|
|
|
|
EMM_CAUSE_SECURITY_MODE_REJECTED_UNSPECIFIED,
|
|
|
|
ESM_CAUSE_PROTOCOL_ERROR_UNSPECIFIED));
|
2019-07-21 06:14:31 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
|
|
|
break;
|
2019-06-23 11:43:23 +00:00
|
|
|
}
|
2017-09-04 04:04:35 +00:00
|
|
|
|
2020-06-04 18:12:05 +00:00
|
|
|
emm_handle_security_mode_complete(
|
2019-11-18 10:34:28 +00:00
|
|
|
mme_ue, &message->emm.security_mode_complete);
|
|
|
|
|
2020-06-04 18:12:05 +00:00
|
|
|
ogs_kdf_kenb(mme_ue->kasme, mme_ue->ul_count.i32,
|
2019-07-21 06:14:31 +00:00
|
|
|
mme_ue->kenb);
|
2020-06-04 18:12:05 +00:00
|
|
|
ogs_kdf_nh_enb(mme_ue->kasme, mme_ue->kenb, mme_ue->nh);
|
2019-07-21 06:14:31 +00:00
|
|
|
mme_ue->nhcc = 1;
|
|
|
|
|
2021-03-09 05:28:07 +00:00
|
|
|
/* Create New GUTI */
|
|
|
|
mme_ue_new_guti(mme_ue);
|
|
|
|
|
2019-06-23 11:43:23 +00:00
|
|
|
mme_s6a_send_ulr(mme_ue);
|
2021-04-23 06:16:18 +00:00
|
|
|
|
|
|
|
if (mme_ue->next.m_tmsi) {
|
2021-03-09 05:28:07 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_initial_context_setup);
|
2019-06-23 11:43:23 +00:00
|
|
|
} else {
|
2021-04-23 06:16:18 +00:00
|
|
|
ogs_fatal("MME always creates new GUTI");
|
|
|
|
ogs_assert_if_reached();
|
|
|
|
OGS_FSM_TRAN(s, &emm_state_registered);
|
2019-06-23 11:43:23 +00:00
|
|
|
}
|
2017-09-04 04:04:35 +00:00
|
|
|
break;
|
2020-05-23 02:24:48 +00:00
|
|
|
case OGS_NAS_EPS_SECURITY_MODE_REJECT:
|
2020-10-01 17:27:58 +00:00
|
|
|
ogs_warn("Security mode reject : IMSI[%s] Cause[%d]",
|
2019-06-23 11:43:23 +00:00
|
|
|
mme_ue->imsi_bcd,
|
|
|
|
message->emm.security_mode_reject.emm_cause);
|
2019-07-20 12:28:36 +00:00
|
|
|
CLEAR_MME_UE_TIMER(mme_ue->t3460);
|
2019-06-23 11:43:23 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
2017-09-04 04:04:35 +00:00
|
|
|
break;
|
2020-05-23 02:24:48 +00:00
|
|
|
case OGS_NAS_EPS_ATTACH_REQUEST:
|
2021-03-09 05:28:07 +00:00
|
|
|
ogs_warn("[%s] Attach request", mme_ue->imsi_bcd);
|
2019-06-23 11:43:23 +00:00
|
|
|
rv = emm_handle_attach_request(
|
2020-07-03 05:03:13 +00:00
|
|
|
mme_ue, &message->emm.attach_request, e->pkbuf);
|
2019-06-23 11:43:23 +00:00
|
|
|
if (rv != OGS_OK) {
|
|
|
|
ogs_error("emm_handle_attach_request() failed");
|
|
|
|
OGS_FSM_TRAN(s, emm_state_exception);
|
2019-07-21 06:14:31 +00:00
|
|
|
break;
|
2019-06-23 11:43:23 +00:00
|
|
|
}
|
2017-09-04 04:04:35 +00:00
|
|
|
|
2019-06-23 11:43:23 +00:00
|
|
|
mme_s6a_send_air(mme_ue, NULL);
|
|
|
|
OGS_FSM_TRAN(s, &emm_state_authentication);
|
|
|
|
break;
|
2020-05-23 02:24:48 +00:00
|
|
|
case OGS_NAS_EPS_TRACKING_AREA_UPDATE_REQUEST:
|
2020-10-01 17:27:58 +00:00
|
|
|
ogs_debug("Tracking area update request");
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_tau_reject(mme_ue,
|
|
|
|
EMM_CAUSE_SECURITY_MODE_REJECTED_UNSPECIFIED));
|
2019-06-23 12:15:59 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
|
|
|
break;
|
2020-05-23 02:24:48 +00:00
|
|
|
case OGS_NAS_EPS_EMM_STATUS:
|
2020-10-01 17:27:58 +00:00
|
|
|
ogs_warn("EMM STATUS : IMSI[%s] Cause[%d]",
|
2019-06-23 11:43:23 +00:00
|
|
|
mme_ue->imsi_bcd,
|
|
|
|
message->emm.emm_status.emm_cause);
|
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
|
|
|
break;
|
2020-05-23 02:24:48 +00:00
|
|
|
case OGS_NAS_EPS_DETACH_REQUEST:
|
2021-01-05 04:24:22 +00:00
|
|
|
ogs_warn("Detach request");
|
2019-06-23 11:43:23 +00:00
|
|
|
rv = emm_handle_detach_request(
|
|
|
|
mme_ue, &message->emm.detach_request_from_ue);
|
|
|
|
if (rv != OGS_OK) {
|
2020-07-03 05:03:13 +00:00
|
|
|
ogs_error("emm_handle_detach_request() failed");
|
2019-06-23 11:43:23 +00:00
|
|
|
OGS_FSM_TRAN(s, emm_state_exception);
|
2019-07-21 06:14:31 +00:00
|
|
|
break;
|
2017-09-03 15:06:39 +00:00
|
|
|
}
|
2019-06-23 11:43:23 +00:00
|
|
|
|
2019-11-15 14:56:55 +00:00
|
|
|
mme_send_delete_session_or_detach(mme_ue);
|
2019-06-23 11:43:23 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_de_registered);
|
2017-09-03 15:06:39 +00:00
|
|
|
break;
|
|
|
|
default:
|
2019-06-23 11:43:23 +00:00
|
|
|
ogs_warn("Unknown message[%d]", message->emm.h.message_type);
|
2017-09-03 15:06:39 +00:00
|
|
|
break;
|
|
|
|
}
|
2019-06-23 11:43:23 +00:00
|
|
|
break;
|
2019-07-20 12:28:36 +00:00
|
|
|
case MME_EVT_EMM_TIMER:
|
|
|
|
switch (e->timer_id) {
|
|
|
|
case MME_TIMER_T3460:
|
|
|
|
if (mme_ue->t3460.retry_count >=
|
|
|
|
mme_timer_cfg(MME_TIMER_T3460)->max_count) {
|
2020-10-01 17:27:58 +00:00
|
|
|
ogs_warn("Retransmission of IMSI[%s] failed. "
|
2021-04-23 06:16:18 +00:00
|
|
|
"Stop retransmission", mme_ue->imsi_bcd);
|
2019-07-20 12:28:36 +00:00
|
|
|
OGS_FSM_TRAN(&mme_ue->sm, &emm_state_exception);
|
2019-07-21 02:42:12 +00:00
|
|
|
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_attach_reject(mme_ue,
|
|
|
|
EMM_CAUSE_SECURITY_MODE_REJECTED_UNSPECIFIED,
|
|
|
|
ESM_CAUSE_PROTOCOL_ERROR_UNSPECIFIED));
|
2019-07-20 12:28:36 +00:00
|
|
|
} else {
|
|
|
|
mme_ue->t3460.retry_count++;
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_security_mode_command(mme_ue));
|
2019-07-20 12:28:36 +00:00
|
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
ogs_error("Unknown timer[%s:%d]",
|
|
|
|
mme_timer_get_name(e->timer_id), e->timer_id);
|
|
|
|
break;
|
|
|
|
}
|
2019-07-20 13:30:53 +00:00
|
|
|
break;
|
2019-06-23 11:43:23 +00:00
|
|
|
default:
|
|
|
|
ogs_error("Unknown event[%s]", mme_event_get_name(e));
|
|
|
|
break;
|
2017-09-03 15:06:39 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
void emm_state_initial_context_setup(ogs_fsm_t *s, mme_event_t *e)
|
2017-09-03 15:06:39 +00:00
|
|
|
{
|
2019-04-27 14:54:30 +00:00
|
|
|
int rv;
|
2017-09-03 15:06:39 +00:00
|
|
|
mme_ue_t *mme_ue = NULL;
|
2020-05-23 02:24:48 +00:00
|
|
|
ogs_nas_eps_message_t *message = NULL;
|
2020-11-08 02:25:53 +00:00
|
|
|
ogs_nas_security_header_type_t h;
|
2017-09-03 15:06:39 +00:00
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
ogs_assert(s);
|
|
|
|
ogs_assert(e);
|
2017-09-03 15:06:39 +00:00
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
mme_sm_debug(e);
|
2017-09-03 15:06:39 +00:00
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
mme_ue = e->mme_ue;
|
|
|
|
ogs_assert(mme_ue);
|
2017-09-03 15:06:39 +00:00
|
|
|
|
2019-06-23 11:43:23 +00:00
|
|
|
switch (e->id) {
|
|
|
|
case OGS_FSM_ENTRY_SIG:
|
|
|
|
break;
|
|
|
|
case OGS_FSM_EXIT_SIG:
|
|
|
|
break;
|
|
|
|
case MME_EVT_EMM_MESSAGE:
|
|
|
|
message = e->nas_message;
|
|
|
|
ogs_assert(message);
|
|
|
|
|
2021-03-09 05:28:07 +00:00
|
|
|
if (message->emm.h.security_header_type
|
|
|
|
== OGS_NAS_SECURITY_HEADER_FOR_SERVICE_REQUEST_MESSAGE) {
|
|
|
|
ogs_debug("Service request");
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_service_reject(mme_ue,
|
|
|
|
EMM_CAUSE_UE_IDENTITY_CANNOT_BE_DERIVED_BY_THE_NETWORK));
|
2021-03-09 05:28:07 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2019-06-23 11:43:23 +00:00
|
|
|
switch (message->emm.h.message_type) {
|
2020-05-23 02:24:48 +00:00
|
|
|
case OGS_NAS_EPS_ATTACH_COMPLETE:
|
2021-04-23 06:16:18 +00:00
|
|
|
ogs_info("[%s] Attach complete", mme_ue->imsi_bcd);
|
|
|
|
|
|
|
|
CLEAR_MME_UE_TIMER(mme_ue->t3450);
|
2019-07-20 13:30:53 +00:00
|
|
|
|
2020-11-08 02:25:53 +00:00
|
|
|
h.type = e->nas_type;
|
|
|
|
if (h.integrity_protected == 0) {
|
|
|
|
ogs_error("[%s] No Integrity Protected", mme_ue->imsi_bcd);
|
|
|
|
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_attach_reject(mme_ue,
|
|
|
|
EMM_CAUSE_SECURITY_MODE_REJECTED_UNSPECIFIED,
|
|
|
|
ESM_CAUSE_PROTOCOL_ERROR_UNSPECIFIED));
|
2020-11-08 02:25:53 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!SECURITY_CONTEXT_IS_VALID(mme_ue)) {
|
|
|
|
ogs_warn("[%s] No Security Context", mme_ue->imsi_bcd);
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_attach_reject(mme_ue,
|
|
|
|
EMM_CAUSE_SECURITY_MODE_REJECTED_UNSPECIFIED,
|
|
|
|
ESM_CAUSE_PROTOCOL_ERROR_UNSPECIFIED));
|
2020-11-08 02:25:53 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2019-06-23 11:43:23 +00:00
|
|
|
rv = emm_handle_attach_complete(
|
|
|
|
mme_ue, &message->emm.attach_complete);
|
|
|
|
if (rv != OGS_OK) {
|
|
|
|
ogs_error("emm_handle_attach_complete() failed "
|
|
|
|
"in emm_state_initial_context_setup");
|
|
|
|
OGS_FSM_TRAN(s, emm_state_exception);
|
|
|
|
break;
|
|
|
|
}
|
2021-03-09 05:28:07 +00:00
|
|
|
|
2021-04-13 08:34:25 +00:00
|
|
|
/* Confirm GUTI */
|
|
|
|
if (mme_ue->next.m_tmsi)
|
|
|
|
mme_ue_confirm_guti(mme_ue);
|
2021-03-09 05:28:07 +00:00
|
|
|
|
2019-07-06 14:30:05 +00:00
|
|
|
if (MME_P_TMSI_IS_AVAILABLE(mme_ue))
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
sgsap_send_tmsi_reallocation_complete(mme_ue));
|
2019-07-05 09:13:32 +00:00
|
|
|
|
2019-06-23 11:43:23 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_registered);
|
2017-09-03 15:06:39 +00:00
|
|
|
break;
|
2021-04-23 06:16:18 +00:00
|
|
|
|
|
|
|
case OGS_NAS_EPS_TRACKING_AREA_UPDATE_COMPLETE:
|
|
|
|
ogs_debug("[%s] Tracking area update complete", mme_ue->imsi_bcd);
|
|
|
|
|
|
|
|
CLEAR_MME_UE_TIMER(mme_ue->t3450);
|
|
|
|
|
|
|
|
h.type = e->nas_type;
|
|
|
|
if (h.integrity_protected == 0) {
|
|
|
|
ogs_error("[%s] No Integrity Protected", mme_ue->imsi_bcd);
|
|
|
|
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_attach_reject(mme_ue,
|
|
|
|
EMM_CAUSE_SECURITY_MODE_REJECTED_UNSPECIFIED,
|
|
|
|
ESM_CAUSE_PROTOCOL_ERROR_UNSPECIFIED));
|
2021-04-23 06:16:18 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!SECURITY_CONTEXT_IS_VALID(mme_ue)) {
|
|
|
|
ogs_warn("[%s] No Security Context", mme_ue->imsi_bcd);
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_attach_reject(mme_ue,
|
|
|
|
EMM_CAUSE_SECURITY_MODE_REJECTED_UNSPECIFIED,
|
|
|
|
ESM_CAUSE_PROTOCOL_ERROR_UNSPECIFIED));
|
2021-04-23 06:16:18 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Confirm GUTI */
|
|
|
|
if (mme_ue->next.m_tmsi)
|
|
|
|
mme_ue_confirm_guti(mme_ue);
|
|
|
|
|
|
|
|
OGS_FSM_TRAN(s, &emm_state_registered);
|
|
|
|
break;
|
|
|
|
|
2020-05-23 02:24:48 +00:00
|
|
|
case OGS_NAS_EPS_ATTACH_REQUEST:
|
2021-03-09 05:28:07 +00:00
|
|
|
ogs_warn("[%s] Attach request", mme_ue->imsi_bcd);
|
2019-06-23 11:43:23 +00:00
|
|
|
rv = emm_handle_attach_request(
|
2020-07-03 05:03:13 +00:00
|
|
|
mme_ue, &message->emm.attach_request, e->pkbuf);
|
2019-06-23 11:43:23 +00:00
|
|
|
if (rv != OGS_OK) {
|
|
|
|
ogs_error("emm_handle_attach_request() failed");
|
|
|
|
OGS_FSM_TRAN(s, emm_state_exception);
|
2020-09-22 17:27:58 +00:00
|
|
|
break;
|
2019-06-23 11:43:23 +00:00
|
|
|
}
|
2017-09-03 15:06:39 +00:00
|
|
|
|
2020-10-22 21:53:13 +00:00
|
|
|
mme_gtp_send_delete_all_sessions(mme_ue,
|
2020-11-07 22:27:12 +00:00
|
|
|
OGS_GTP_DELETE_SEND_AUTHENTICATION_REQUEST);
|
2019-06-23 11:43:23 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_authentication);
|
|
|
|
break;
|
2020-05-23 02:24:48 +00:00
|
|
|
case OGS_NAS_EPS_EMM_STATUS:
|
2020-10-01 17:27:58 +00:00
|
|
|
ogs_warn("EMM STATUS : IMSI[%s] Cause[%d]",
|
2019-06-23 11:43:23 +00:00
|
|
|
mme_ue->imsi_bcd,
|
|
|
|
message->emm.emm_status.emm_cause);
|
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
|
|
|
break;
|
2020-05-23 02:24:48 +00:00
|
|
|
case OGS_NAS_EPS_DETACH_REQUEST:
|
2021-01-05 04:24:22 +00:00
|
|
|
ogs_warn("Detach request");
|
2019-06-23 11:43:23 +00:00
|
|
|
rv = emm_handle_detach_request(
|
|
|
|
mme_ue, &message->emm.detach_request_from_ue);
|
|
|
|
if (rv != OGS_OK) {
|
2020-07-03 05:03:13 +00:00
|
|
|
ogs_error("emm_handle_detach_request() failed");
|
2019-06-23 11:43:23 +00:00
|
|
|
OGS_FSM_TRAN(s, emm_state_exception);
|
2020-09-22 17:27:58 +00:00
|
|
|
break;
|
2017-09-03 15:06:39 +00:00
|
|
|
}
|
2019-06-23 11:43:23 +00:00
|
|
|
|
2019-11-15 14:56:55 +00:00
|
|
|
mme_send_delete_session_or_detach(mme_ue);
|
2019-06-23 11:43:23 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_de_registered);
|
2017-09-03 15:06:39 +00:00
|
|
|
break;
|
2020-09-09 02:16:46 +00:00
|
|
|
case OGS_NAS_EPS_SECURITY_MODE_COMPLETE:
|
|
|
|
ogs_warn("[%s] Duplicated : Security mode complete",
|
|
|
|
mme_ue->imsi_bcd);
|
|
|
|
break;
|
2017-09-03 15:06:39 +00:00
|
|
|
default:
|
2021-04-23 06:16:18 +00:00
|
|
|
ogs_warn("Unknown message[%d]", message->emm.h.message_type);
|
2017-09-03 15:06:39 +00:00
|
|
|
break;
|
|
|
|
}
|
2019-06-23 11:43:23 +00:00
|
|
|
break;
|
2019-07-20 13:30:53 +00:00
|
|
|
case MME_EVT_EMM_TIMER:
|
|
|
|
switch (e->timer_id) {
|
2021-04-23 06:16:18 +00:00
|
|
|
case MME_TIMER_T3450:
|
|
|
|
if (mme_ue->t3450.retry_count >=
|
|
|
|
mme_timer_cfg(MME_TIMER_T3450)->max_count) {
|
|
|
|
ogs_warn("Retransmission of IMSI[%s] failed. "
|
|
|
|
"Stop retransmission", mme_ue->imsi_bcd);
|
|
|
|
OGS_FSM_TRAN(&mme_ue->sm, &emm_state_exception);
|
|
|
|
} else {
|
|
|
|
ogs_pkbuf_t *emmbuf = NULL;
|
|
|
|
|
|
|
|
mme_ue->t3450.retry_count++;
|
|
|
|
|
|
|
|
emmbuf = mme_ue->t3450.pkbuf;
|
|
|
|
ogs_expect_or_return(emmbuf);
|
|
|
|
|
|
|
|
mme_ue->t3450.pkbuf = ogs_pkbuf_copy(emmbuf);
|
|
|
|
ogs_assert(mme_ue->t3450.pkbuf);
|
|
|
|
|
|
|
|
ogs_timer_start(mme_ue->t3450.timer,
|
|
|
|
mme_timer_cfg(MME_TIMER_T3450)->duration);
|
|
|
|
|
|
|
|
rv = nas_eps_send_to_downlink_nas_transport(mme_ue, emmbuf);
|
|
|
|
ogs_expect(rv == OGS_OK);
|
|
|
|
}
|
|
|
|
break;
|
2019-07-20 13:30:53 +00:00
|
|
|
default:
|
|
|
|
ogs_error("Unknown timer[%s:%d]",
|
|
|
|
mme_timer_get_name(e->timer_id), e->timer_id);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
break;
|
2019-06-23 11:43:23 +00:00
|
|
|
default:
|
|
|
|
ogs_error("Unknown event[%s]", mme_event_get_name(e));
|
|
|
|
break;
|
2017-09-03 15:06:39 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
void emm_state_exception(ogs_fsm_t *s, mme_event_t *e)
|
2017-09-06 15:37:16 +00:00
|
|
|
{
|
2020-09-22 17:27:58 +00:00
|
|
|
int rv;
|
|
|
|
|
2019-07-20 12:28:36 +00:00
|
|
|
mme_ue_t *mme_ue = NULL;
|
2020-09-22 17:27:58 +00:00
|
|
|
enb_ue_t *enb_ue = NULL;
|
|
|
|
ogs_nas_eps_message_t *message = NULL;
|
|
|
|
ogs_nas_security_header_type_t h;
|
2019-07-20 12:28:36 +00:00
|
|
|
|
2019-04-27 14:54:30 +00:00
|
|
|
ogs_assert(e);
|
|
|
|
mme_sm_debug(e);
|
2017-09-06 15:37:16 +00:00
|
|
|
|
2019-07-20 12:28:36 +00:00
|
|
|
mme_ue = e->mme_ue;
|
|
|
|
ogs_assert(mme_ue);
|
|
|
|
|
2019-06-23 11:43:23 +00:00
|
|
|
switch (e->id) {
|
|
|
|
case OGS_FSM_ENTRY_SIG:
|
2019-07-20 14:06:54 +00:00
|
|
|
CLEAR_SERVICE_INDICATOR(mme_ue);
|
2019-07-20 12:28:36 +00:00
|
|
|
CLEAR_MME_UE_ALL_TIMERS(mme_ue);
|
2019-06-23 11:43:23 +00:00
|
|
|
break;
|
|
|
|
case OGS_FSM_EXIT_SIG:
|
|
|
|
break;
|
2020-09-22 17:27:58 +00:00
|
|
|
|
|
|
|
case MME_EVT_EMM_MESSAGE:
|
|
|
|
message = e->nas_message;
|
|
|
|
ogs_assert(message);
|
|
|
|
|
2020-10-29 02:59:27 +00:00
|
|
|
enb_ue = enb_ue_cycle(mme_ue->enb_ue);
|
2020-09-22 17:27:58 +00:00
|
|
|
ogs_assert(enb_ue);
|
|
|
|
|
|
|
|
h.type = e->nas_type;
|
|
|
|
|
|
|
|
switch (message->emm.h.message_type) {
|
|
|
|
case OGS_NAS_EPS_ATTACH_REQUEST:
|
2021-03-09 05:28:07 +00:00
|
|
|
ogs_warn("[%s] Attach request", mme_ue->imsi_bcd);
|
2020-09-22 17:27:58 +00:00
|
|
|
rv = emm_handle_attach_request(
|
|
|
|
mme_ue, &message->emm.attach_request, e->pkbuf);
|
|
|
|
if (rv != OGS_OK) {
|
|
|
|
ogs_error("emm_handle_attach_request() failed");
|
|
|
|
OGS_FSM_TRAN(s, emm_state_exception);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!MME_UE_HAVE_IMSI(mme_ue)) {
|
|
|
|
CLEAR_MME_UE_TIMER(mme_ue->t3470);
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_identity_request(mme_ue));
|
2021-04-23 06:16:18 +00:00
|
|
|
|
|
|
|
OGS_FSM_TRAN(s, &emm_state_de_registered);
|
2020-09-22 17:27:58 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (h.integrity_protected && SECURITY_CONTEXT_IS_VALID(mme_ue)) {
|
2020-10-22 21:53:13 +00:00
|
|
|
if (SESSION_CONTEXT_IS_AVAILABLE(mme_ue)) {
|
|
|
|
mme_gtp_send_delete_all_sessions(mme_ue,
|
|
|
|
OGS_GTP_DELETE_HANDLE_PDN_CONNECTIVITY_REQUEST);
|
2020-09-22 17:27:58 +00:00
|
|
|
} else {
|
2020-10-22 21:53:13 +00:00
|
|
|
rv = nas_eps_send_emm_to_esm(mme_ue,
|
|
|
|
&mme_ue->pdn_connectivity_request);
|
|
|
|
if (rv != OGS_OK) {
|
|
|
|
ogs_error("nas_eps_send_emm_to_esm() failed");
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
nas_eps_send_attach_reject(mme_ue,
|
|
|
|
EMM_CAUSE_PROTOCOL_ERROR_UNSPECIFIED,
|
|
|
|
ESM_CAUSE_PROTOCOL_ERROR_UNSPECIFIED));
|
2020-10-22 21:53:13 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_exception);
|
|
|
|
break;
|
|
|
|
}
|
2020-09-22 17:27:58 +00:00
|
|
|
}
|
2020-10-22 21:53:13 +00:00
|
|
|
OGS_FSM_TRAN(s, &emm_state_initial_context_setup);
|
2020-09-22 17:27:58 +00:00
|
|
|
} else {
|
|
|
|
if (SESSION_CONTEXT_IS_AVAILABLE(mme_ue)) {
|
2020-10-22 21:53:13 +00:00
|
|
|
mme_gtp_send_delete_all_sessions(mme_ue,
|
2020-11-07 22:27:12 +00:00
|
|
|
OGS_GTP_DELETE_SEND_AUTHENTICATION_REQUEST);
|
2020-09-22 17:27:58 +00:00
|
|
|
} else {
|
|
|
|
mme_s6a_send_air(mme_ue, NULL);
|
|
|
|
}
|
|
|
|
OGS_FSM_TRAN(s, &emm_state_authentication);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
ogs_warn("Unknown message[%d]", message->emm.h.message_type);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
2019-06-23 11:43:23 +00:00
|
|
|
default:
|
|
|
|
ogs_error("Unknown event[%s]", mme_event_get_name(e));
|
2017-09-06 15:37:16 +00:00
|
|
|
}
|
|
|
|
}
|