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open5gs/src/amf/nsmf-handler.c

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/*
* 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/>.
*/
#include "nsmf-handler.h"
#include "nas-path.h"
#include "ngap-path.h"
#include "sbi-path.h"
#include "gmm-build.h"
int amf_nsmf_pdusession_handle_create_sm_context(
amf_sess_t *sess, ogs_sbi_message_t *recvmsg)
{
int rv, r;
amf_ue_t *amf_ue = NULL;
ran_ue_t *ran_ue = NULL;
ogs_assert(recvmsg);
ogs_assert(sess);
sess = amf_sess_cycle(sess);
if (!sess) {
ogs_error("Session has already been removed");
return OGS_ERROR;
}
amf_ue = amf_ue_cycle(sess->amf_ue);
if (!amf_ue) {
ogs_error("UE(amf_ue) Context has already been removed");
return OGS_ERROR;
}
ran_ue = ran_ue_cycle(sess->ran_ue);
if (!ran_ue) {
ogs_error("[%s] RAN-NG Context has already been removed", amf_ue->supi);
return OGS_ERROR;
}
if (recvmsg->res_status == OGS_SBI_HTTP_STATUS_CREATED) {
ogs_sbi_message_t message;
ogs_sbi_header_t header;
if (!recvmsg->http.location) {
ogs_error("[%d:%d] No http.location", sess->psi, sess->pti);
r = nas_5gs_send_back_gsm_message(ran_ue, sess,
OGS_5GMM_CAUSE_PAYLOAD_WAS_NOT_FORWARDED,
AMF_NAS_BACKOFF_TIME);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
return OGS_ERROR;
}
memset(&header, 0, sizeof(header));
header.uri = recvmsg->http.location;
rv = ogs_sbi_parse_header(&message, &header);
if (rv != OGS_OK) {
ogs_error("[%d:%d] Cannot parse http.location [%s]",
sess->psi, sess->pti, recvmsg->http.location);
r = nas_5gs_send_back_gsm_message(ran_ue, sess,
OGS_5GMM_CAUSE_PAYLOAD_WAS_NOT_FORWARDED,
AMF_NAS_BACKOFF_TIME);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
return OGS_ERROR;
}
if (!message.h.resource.component[1]) {
ogs_error("[%d:%d] No SmContextRef [%s]",
sess->psi, sess->pti, recvmsg->http.location);
ogs_sbi_header_free(&header);
r = nas_5gs_send_back_gsm_message(ran_ue, sess,
OGS_5GMM_CAUSE_PAYLOAD_WAS_NOT_FORWARDED,
AMF_NAS_BACKOFF_TIME);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
return OGS_ERROR;
}
if (sess->pdu_session_establishment_accept) {
/*
* [1-SERVER] /namf-comm/v1/ue-contexts/{supi}/n1-n2-messages
* [2-CLIENT] /nsmf-pdusession/v1/sm-contexts
*
* If [1-SERVER] arrives before [2-CLIENT],
* there is no sm-context-ref. The PDU session establishment accept
* stored in [1-SERVER] is now trasnmitted to gNB.
*/
r = ngap_send_to_ran_ue(ran_ue,
sess->pdu_session_establishment_accept);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
sess->pdu_session_establishment_accept = NULL;
if (rv != OGS_OK) {
ogs_error("[%d:%d] nas_5gs_send_to_gnb() failed",
sess->psi, sess->pti);
ogs_sbi_header_free(&header);
r = nas_5gs_send_back_gsm_message(ran_ue, sess,
OGS_5GMM_CAUSE_PAYLOAD_WAS_NOT_FORWARDED,
AMF_NAS_BACKOFF_TIME);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
return OGS_ERROR;
}
}
if (sess->sm_context_ref)
ogs_free(sess->sm_context_ref);
sess->sm_context_ref = ogs_strdup(message.h.resource.component[1]);
ogs_assert(sess->sm_context_ref);
ogs_sbi_header_free(&header);
} else {
OpenAPI_sm_context_create_error_t *SmContextCreateError = NULL;
OpenAPI_ref_to_binary_data_t *n1SmMsg = NULL;
ogs_pkbuf_t *n1smbuf = NULL;
SmContextCreateError = recvmsg->SmContextCreateError;
if (!SmContextCreateError) {
ogs_error("[%d:%d] No SmContextCreateError", sess->psi, sess->pti);
r = nas_5gs_send_back_gsm_message(ran_ue, sess,
OGS_5GMM_CAUSE_PAYLOAD_WAS_NOT_FORWARDED,
AMF_NAS_BACKOFF_TIME);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
return OGS_ERROR;
}
if (!SmContextCreateError->error) {
ogs_error("[%d:%d] No Error", sess->psi, sess->pti);
r = nas_5gs_send_back_gsm_message(ran_ue, sess,
OGS_5GMM_CAUSE_PAYLOAD_WAS_NOT_FORWARDED,
AMF_NAS_BACKOFF_TIME);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
return OGS_ERROR;
}
n1SmMsg = SmContextCreateError->n1_sm_msg;
if (n1SmMsg && n1SmMsg->content_id) {
n1smbuf = ogs_sbi_find_part_by_content_id(
recvmsg, n1SmMsg->content_id);
if (n1smbuf) {
/*
* NOTE : The pkbuf created in the SBI message will be removed
* from ogs_sbi_message_free(), so it must be copied.
*/
ogs_error("[%d:%d] PDU session establishment reject",
sess->psi, sess->pti);
n1smbuf = ogs_pkbuf_copy(n1smbuf);
ogs_assert(n1smbuf);
r = nas_5gs_send_gsm_reject(ran_ue, sess,
OGS_NAS_PAYLOAD_CONTAINER_N1_SM_INFORMATION, n1smbuf);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
return OGS_ERROR;
}
}
ogs_error("[%d:%d] 5GMM was not forwarded", sess->psi, sess->pti);
r = nas_5gs_send_back_gsm_message(ran_ue, sess,
OGS_5GMM_CAUSE_PAYLOAD_WAS_NOT_FORWARDED,
AMF_NAS_BACKOFF_TIME);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
return OGS_ERROR;
}
return OGS_OK;
}
int amf_nsmf_pdusession_handle_update_sm_context(
amf_sess_t *sess, int state, ogs_sbi_message_t *recvmsg)
{
int r;
amf_ue_t *amf_ue = NULL;
ran_ue_t *ran_ue = NULL;
ogs_assert(recvmsg);
ogs_assert(sess);
sess = amf_sess_cycle(sess);
if (!sess) {
ogs_error("Session has already been removed");
return OGS_ERROR;
}
amf_ue = amf_ue_cycle(sess->amf_ue);
if (!amf_ue) {
ogs_error("UE(amf_ue) Context has already been removed");
return OGS_ERROR;
}
ran_ue = ran_ue_cycle(sess->ran_ue);
if (recvmsg->res_status == OGS_SBI_HTTP_STATUS_NO_CONTENT ||
recvmsg->res_status == OGS_SBI_HTTP_STATUS_OK) {
OpenAPI_sm_context_updated_data_t *SmContextUpdatedData = NULL;
OpenAPI_ref_to_binary_data_t *n1SmMsg = NULL;
OpenAPI_ref_to_binary_data_t *n2SmInfo = NULL;
ogs_pkbuf_t *n1smbuf = NULL;
ogs_pkbuf_t *n2smbuf = NULL;
if (recvmsg->SmContextUpdatedData &&
recvmsg->SmContextUpdatedData->n2_sm_info) {
SmContextUpdatedData = recvmsg->SmContextUpdatedData;
ogs_assert(SmContextUpdatedData);
n2SmInfo = SmContextUpdatedData->n2_sm_info;
ogs_assert(n2SmInfo);
if (n2SmInfo->content_id) {
n2smbuf = ogs_sbi_find_part_by_content_id(
recvmsg, n2SmInfo->content_id);
}
n1SmMsg = SmContextUpdatedData->n1_sm_msg;
if (n1SmMsg && n1SmMsg->content_id) {
n1smbuf = ogs_sbi_find_part_by_content_id(
recvmsg, n1SmMsg->content_id);
}
switch (SmContextUpdatedData->n2_sm_info_type) {
case OpenAPI_n2_sm_info_type_PDU_RES_SETUP_REQ:
if (!n2smbuf) {
ogs_error("[%s:%d] No N2 SM Content",
amf_ue->supi, sess->psi);
nas_5gs_send_gmm_reject(ran_ue, amf_ue,
OGS_5GMM_CAUSE_5GS_SERVICES_NOT_ALLOWED);
AMF_SESS_CLEAR(sess);
return OGS_ERROR;
}
if (state == AMF_UPDATE_SM_CONTEXT_REGISTRATION_REQUEST) {
AMF_SESS_STORE_N2_TRANSFER(
sess, pdu_session_resource_setup_request,
ogs_pkbuf_copy(n2smbuf));
if (AMF_SESSION_SYNC_DONE(amf_ue,
AMF_RELEASE_SM_CONTEXT_REGISTRATION_ACCEPT) &&
AMF_SESSION_SYNC_DONE(amf_ue,
AMF_UPDATE_SM_CONTEXT_REGISTRATION_REQUEST)) {
if (ran_ue) {
if (!PCF_AM_POLICY_ASSOCIATED(amf_ue)) {
r = amf_ue_sbi_discover_and_send(
OGS_SBI_SERVICE_TYPE_NPCF_AM_POLICY_CONTROL,
NULL,
amf_npcf_am_policy_control_build_create,
amf_ue, 0, NULL);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
} else {
CLEAR_AMF_UE_TIMER(amf_ue->t3550);
r = nas_5gs_send_registration_accept(amf_ue);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
AMF_UE_CLEAR_N2_TRANSFER(amf_ue,
pdu_session_resource_setup_request);
}
} else {
ogs_warn("[%s] RAN-NG Context has already "
"been removed", amf_ue->supi);
}
}
} else if (state == AMF_UPDATE_SM_CONTEXT_SERVICE_REQUEST) {
AMF_SESS_STORE_N2_TRANSFER(
sess, pdu_session_resource_setup_request,
ogs_pkbuf_copy(n2smbuf));
if (AMF_SESSION_SYNC_DONE(amf_ue,
AMF_RELEASE_SM_CONTEXT_SERVICE_ACCEPT) &&
AMF_SESSION_SYNC_DONE(amf_ue,
AMF_UPDATE_SM_CONTEXT_SERVICE_REQUEST)) {
r = nas_5gs_send_service_accept(amf_ue);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
AMF_UE_CLEAR_N2_TRANSFER(
amf_ue, pdu_session_resource_setup_request);
}
} else if (state == AMF_UPDATE_SM_CONTEXT_HANDOVER_REQUIRED) {
AMF_SESS_STORE_N2_TRANSFER(
sess, handover_request, ogs_pkbuf_copy(n2smbuf));
if (AMF_SESSION_SYNC_DONE(amf_ue,
AMF_UPDATE_SM_CONTEXT_HANDOVER_REQUIRED)) {
r = ngap_send_handover_request(amf_ue);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
AMF_UE_CLEAR_N2_TRANSFER(amf_ue, handover_request);
}
} else {
ogs_error("Invalid STATE[%d]", state);
ogs_assert_if_reached();
}
break;
case OpenAPI_n2_sm_info_type_PDU_RES_MOD_REQ:
if (!n1smbuf) {
ogs_error("[%s:%d] No N1 SM Content [%s]",
amf_ue->supi, sess->psi, n1SmMsg->content_id);
r = nas_5gs_send_back_gsm_message(ran_ue, sess,
OGS_5GMM_CAUSE_PAYLOAD_WAS_NOT_FORWARDED,
AMF_NAS_BACKOFF_TIME);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
return OGS_ERROR;
}
if (!n2smbuf) {
ogs_error("[%s:%d] No N2 SM Content",
amf_ue->supi, sess->psi);
r = nas_5gs_send_back_gsm_message(ran_ue, sess,
OGS_5GMM_CAUSE_PAYLOAD_WAS_NOT_FORWARDED,
AMF_NAS_BACKOFF_TIME);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
return OGS_ERROR;
}
/*
* NOTE : The pkbuf created in the SBI message will be removed
* from ogs_sbi_message_free(), so it must be copied.
*/
n1smbuf = ogs_pkbuf_copy(n1smbuf);
ogs_assert(n1smbuf);
n2smbuf = ogs_pkbuf_copy(n2smbuf);
ogs_assert(n2smbuf);
r = nas_send_pdu_session_modification_command(
sess, n1smbuf, n2smbuf);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
break;
case OpenAPI_n2_sm_info_type_PDU_RES_REL_CMD:
if (!n1smbuf) {
ogs_error("[%s:%d] No N1 SM Content [%s]",
amf_ue->supi, sess->psi, n1SmMsg->content_id);
r = nas_5gs_send_back_gsm_message(ran_ue, sess,
OGS_5GMM_CAUSE_PAYLOAD_WAS_NOT_FORWARDED,
AMF_NAS_BACKOFF_TIME);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
return OGS_ERROR;
}
if (!n2smbuf) {
ogs_error("[%s:%d] No N2 SM Content",
amf_ue->supi, sess->psi);
r = nas_5gs_send_back_gsm_message(ran_ue, sess,
OGS_5GMM_CAUSE_PAYLOAD_WAS_NOT_FORWARDED,
AMF_NAS_BACKOFF_TIME);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
return OGS_ERROR;
}
/*
* NOTE : The pkbuf created in the SBI message will be removed
* from ogs_sbi_message_free(), so it must be copied.
*/
n1smbuf = ogs_pkbuf_copy(n1smbuf);
ogs_assert(n1smbuf);
n2smbuf = ogs_pkbuf_copy(n2smbuf);
ogs_assert(n2smbuf);
r = nas_send_pdu_session_release_command(
sess, n1smbuf, n2smbuf);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
break;
case OpenAPI_n2_sm_info_type_PATH_SWITCH_REQ_ACK:
if (!n2smbuf) {
ogs_error("[%s:%d] No N2 SM Content",
amf_ue->supi, sess->psi);
r = ngap_send_error_indication2(ran_ue,
NGAP_Cause_PR_protocol,
NGAP_CauseProtocol_semantic_error);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
return OGS_ERROR;
}
AMF_SESS_STORE_N2_TRANSFER(
sess, path_switch_request_ack,
ogs_pkbuf_copy(n2smbuf));
if (AMF_SESSION_SYNC_DONE(amf_ue, state)) {
r = ngap_send_path_switch_ack(sess);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
AMF_UE_CLEAR_N2_TRANSFER(amf_ue, path_switch_request_ack);
}
break;
case OpenAPI_n2_sm_info_type_HANDOVER_CMD:
if (!n2smbuf) {
ogs_error("[%s:%d] No N2 SM Content",
amf_ue->supi, sess->psi);
r = ngap_send_error_indication2(ran_ue,
NGAP_Cause_PR_protocol,
NGAP_CauseProtocol_semantic_error);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
return OGS_ERROR;
}
AMF_SESS_STORE_N2_TRANSFER(
sess, handover_command, ogs_pkbuf_copy(n2smbuf));
if (AMF_SESSION_SYNC_DONE(amf_ue, state)) {
r = ngap_send_handover_command(amf_ue);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
AMF_UE_CLEAR_N2_TRANSFER(amf_ue, handover_command);
}
break;
default:
ogs_error("Not implemented [%d]",
SmContextUpdatedData->n2_sm_info_type);
r = ngap_send_error_indication2(ran_ue,
NGAP_Cause_PR_protocol,
NGAP_CauseProtocol_semantic_error);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
}
} else {
SmContextUpdatedData = recvmsg->SmContextUpdatedData;
if (state == AMF_UPDATE_SM_CONTEXT_ACTIVATED) {
/*
* 1. PDUSessionResourceSetupResponse
* 2. /nsmf-pdusession/v1/sm-contexts/{smContextRef}/modify
* 3. PFCP Session Modifcation Request (OuterHeaderCreation)
* 4. PFCP Session Modifcation Response
*/
/*
* 1. InitialContextSetupResponse
* 2. /nsmf-pdusession/v1/sm-contexts/{smContextRef}/modify
* 3. PFCP Session Modifcation Request (Apply: FORWARD)
* 4. PFCP Session Modifcation Response
*/
} else if (state == AMF_UPDATE_SM_CONTEXT_SETUP_FAIL) {
/*
* TS23.502
* 4.2.3 Service Request procedures
* 4.2.3.2 UE Triggered Service Request
*
* 15. ...
* If a PDU Session is rejected by the serving NG-RAN
* with an indication that the PDU Session was rejected
* because User Plane Security Enforcement is not supported
* in the serving NG-RAN and the User Plane Enforcement Policy
* indicates "Required" as described in clause 5.10.3
* of TS 23.501 [2], the SMF shall trigger the release
* of this PDU Session.
*
* In all other cases of PDU Session rejection,
* the SMF can decide whether to release the PDU Session
* or to deactivate the UP connection of this PDU Session.
*
*
* TS29.502
*
* 5.2.2.3.2
* Activation and Deactivation of the User Plane connection
* of a PDU session
* 5.2.2.3.2.2
* Activation of User Plane connectivity of a PDU session
*
* 3. ...
* N2 SM information received from the 5G-AN
* (see PDU Session Resource Setup Unsuccessful Transfer IE
* in clause 9.3.4.16 of 3GPP TS 38.413 [9]),
* including the Cause of the failure, if resources failed
* to be established for the PDU session.
*
* Upon receipt of this request, the SMF shall:
* - consider that the activation of the User Plane connection
* has failed and set the upCnxState attribute to DEACTIVATED"
* otherwise.
*
* 1. PDUSessionResourceSetupResponse(Unsuccessful)
* 2. /nsmf-pdusession/v1/sm-contexts/{smContextRef}/modify
* 3. PFCP Session Modifcation Request (Apply:Buff & NOCP)
* 4. PFCP Session Modifcation Response
* 5. UEContextReleaseCommand
* 6. UEContextReleaseComplete
*/
ogs_warn("PDUSessionResourceSetupResponse(Unsuccessful)");
ogs_assert(amf_ue->deactivation.group);
r = ngap_send_amf_ue_context_release_command(amf_ue,
amf_ue->deactivation.group,
amf_ue->deactivation.cause,
NGAP_UE_CTX_REL_NG_REMOVE_AND_UNLINK, 0);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
} else if (state == AMF_UPDATE_SM_CONTEXT_MODIFIED) {
/*
* 1. PDUSessionResourceModifyResponse
* 2. /nsmf-pdusession/v1/sm-contexts/{smContextRef}/modify
* 3. PFCP Session Modifcation Request
* 4. PFCP Session Modifcation Response
*/
/*
* 1. PDU session release request
* 2. /nsmf-pdusession/v1/sm-contexts/{smContextRef}/modify
*/
/*
* 1. PDU session modification complete
* 2. /nsmf-pdusession/v1/sm-contexts/{smContextRef}/modify
*/
} else if (state == AMF_UPDATE_SM_CONTEXT_DEACTIVATED) {
/*
* 1. UEContextReleaseRequest
* 2. /nsmf-pdusession/v1/sm-contexts/{smContextRef}/modify
* 3. PFCP Session Modifcation Request (Apply:Buff & NOCP)
* 4. PFCP Session Modifcation Response
* 5. UEContextReleaseCommand
* 6. UEContextReleaseComplete
*/
if (AMF_SESSION_SYNC_DONE(amf_ue, state)) {
ogs_assert(amf_ue->deactivation.group);
r = ngap_send_amf_ue_context_release_command(amf_ue,
amf_ue->deactivation.group,
amf_ue->deactivation.cause,
NGAP_UE_CTX_REL_NG_REMOVE_AND_UNLINK, 0);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
}
} else if (state == AMF_UPDATE_SM_CONTEXT_REGISTRATION_REQUEST) {
/* Not reached here */
ogs_assert_if_reached();
} else if (state == AMF_UPDATE_SM_CONTEXT_SERVICE_REQUEST) {
/* Not reached here */
ogs_assert_if_reached();
} else if (state == AMF_UPDATE_SM_CONTEXT_N2_RELEASED) {
/*
* 1. PDUSessionResourceReleaseResponse
* 2. /nsmf-pdusession/v1/sm-contexts/{smContextRef}/modify
*/
ogs_info("[%s:%d] Receive Update SM context(N2-RELEASED)",
amf_ue->supi, sess->psi);
sess->n2_released = true;
} else if (state == AMF_UPDATE_SM_CONTEXT_N1_RELEASED) {
/*
* 1. PDU session release complete
* CLEAR_SM_CONTEXT_REF(sess) in gmm-handler.c
* 2. /nsmf-pdusession/v1/sm-contexts/{smContextRef}/modify
*/
ogs_info("[%s:%d] Receive Update SM context(N1-RELEASED)",
amf_ue->supi, sess->psi);
sess->n1_released = true;
} else if (state ==
AMF_UPDATE_SM_CONTEXT_DUPLICATED_PDU_SESSION_ID) {
/*
* 1. PDU session establishment request
* (Duplicated PDU Session ID)
* 2. /nsmf-pdusession/v1/sm-contexts/{smContextRef}/modify
* 3. POST /nsmf-pdusession/v1/sm-contexts
*/
ogs_warn("[%s:%d] Receive Update SM context"
"(DUPLICATED_PDU_SESSION_ID)", amf_ue->supi, sess->psi);
if (ran_ue) {
r = amf_sess_sbi_discover_and_send(
OGS_SBI_SERVICE_TYPE_NSMF_PDUSESSION, NULL,
amf_nsmf_pdusession_build_create_sm_context,
ran_ue, sess, AMF_CREATE_SM_CONTEXT_NO_STATE, NULL);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
} else {
ogs_warn("[%s] RAN-NG Context has already been removed",
amf_ue->supi);
}
} else if (state == AMF_UPDATE_SM_CONTEXT_PATH_SWITCH_REQUEST) {
/* Not reached here */
ogs_assert_if_reached();
} else if (state == AMF_UPDATE_SM_CONTEXT_HANDOVER_REQUIRED) {
/* Not reached here */
ogs_assert_if_reached();
} else if (state == AMF_UPDATE_SM_CONTEXT_HANDOVER_REQ_ACK) {
/* Not reached here */
ogs_assert_if_reached();
} else if (state == AMF_UPDATE_SM_CONTEXT_HANDOVER_CANCEL) {
if (AMF_SESSION_SYNC_DONE(amf_ue, state)) {
ran_ue_t *source_ue = NULL, *target_ue = NULL;
source_ue = sess->ran_ue;
ogs_assert(source_ue);
target_ue = ran_ue_cycle(source_ue->target_ue);
if (target_ue) {
r = ngap_send_ran_ue_context_release_command(
target_ue,
NGAP_Cause_PR_radioNetwork,
NGAP_CauseRadioNetwork_handover_cancelled,
NGAP_UE_CTX_REL_NG_HANDOVER_CANCEL, 0);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
} else {
ogs_warn("[%s] RAN-NG Context has already been removed",
amf_ue->supi);
}
}
} else if (state == AMF_UPDATE_SM_CONTEXT_HANDOVER_NOTIFY) {
/* Nothing to do */
} else if (state == AMF_REMOVE_S1_CONTEXT_BY_LO_CONNREFUSED) {
if (AMF_SESSION_SYNC_DONE(amf_ue, state)) {
amf_ue_deassociate(amf_ue);
if (ran_ue) {
ogs_debug(" SUPI[%s]", amf_ue->supi);
ran_ue_remove(ran_ue);
} else {
ogs_warn("[%s] RAN-NG Context has already been removed",
amf_ue->supi);
}
/*
* When AMF release the NAS signalling connection,
* ran_ue context is removed by ran_ue_remove() and
* amf_ue/ran_ue is de-associated by amf_ue_deassociate().
*
* In this case, implicit deregistration is attempted
* by the mobile reachable timer according to the standard document,
* and amf_ue will be removed by amf_ue_remove().
*
* TS 24.501
* 5.3.7 Handling of the periodic registration update timer and
*
* Start AMF_TIMER_MOBILE_REACHABLE
* mobile reachable timer
* The network supervises the periodic registration update procedure
* of the UE by means of the mobile reachable timer.
* If the UE is not registered for emergency services,
* the mobile reachable timer shall be longer than the value of timer
* T3512. In this case, by default, the mobile reachable timer is
* 4 minutes greater than the value of timer T3512.
* The mobile reachable timer shall be reset and started with the
* value as indicated above, when the AMF releases the NAS signalling
* connection for the UE.
*
* TODO: If the UE is registered for emergency services, the AMF shall
* set the mobile reachable timer with a value equal to timer T3512.
*/
ogs_timer_start(amf_ue->mobile_reachable.timer,
ogs_time_from_sec(
amf_self()->time.t3512.value + 240));
}
} else if (state == AMF_REMOVE_S1_CONTEXT_BY_RESET_ALL) {
if (AMF_SESSION_SYNC_DONE(amf_ue, state)) {
amf_ue_deassociate(amf_ue);
if (ran_ue) {
amf_gnb_t *gnb = ran_ue->gnb;
ogs_assert(gnb);
ogs_debug(" SUPI[%s]", amf_ue->supi);
ran_ue_remove(ran_ue);
if (ogs_list_count(&gnb->ran_ue_list) == 0) {
r = ngap_send_ng_reset_ack(gnb, NULL);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
}
} else {
ogs_warn("[%s] RAN-NG Context has already been removed",
amf_ue->supi);
}
/*
* When AMF release the NAS signalling connection,
* ran_ue context is removed by ran_ue_remove() and
* amf_ue/ran_ue is de-associated by amf_ue_deassociate().
*
* In this case, implicit deregistration is attempted
* by the mobile reachable timer according to the standard document,
* and amf_ue will be removed by amf_ue_remove().
*
* TS 24.501
* 5.3.7 Handling of the periodic registration update timer and
*
* Start AMF_TIMER_MOBILE_REACHABLE
* mobile reachable timer
* The network supervises the periodic registration update procedure
* of the UE by means of the mobile reachable timer.
* If the UE is not registered for emergency services,
* the mobile reachable timer shall be longer than the value of timer
* T3512. In this case, by default, the mobile reachable timer is
* 4 minutes greater than the value of timer T3512.
* The mobile reachable timer shall be reset and started with the
* value as indicated above, when the AMF releases the NAS signalling
* connection for the UE.
*
* TODO: If the UE is registered for emergency services, the AMF shall
* set the mobile reachable timer with a value equal to timer T3512.
*/
ogs_timer_start(amf_ue->mobile_reachable.timer,
ogs_time_from_sec(
amf_self()->time.t3512.value + 240));
}
} else if (state == AMF_REMOVE_S1_CONTEXT_BY_RESET_PARTIAL) {
if (AMF_SESSION_SYNC_DONE(amf_ue, state)) {
ran_ue_t *iter = NULL;
amf_ue_deassociate(amf_ue);
if (ran_ue) {
amf_gnb_t *gnb = ran_ue->gnb;
ogs_assert(gnb);
ogs_debug(" SUPI[%s]", amf_ue->supi);
ran_ue_remove(ran_ue);
ogs_list_for_each(&gnb->ran_ue_list, iter) {
if (iter->part_of_ng_reset_requested == true) {
/* The GNB_UE context
* where PartOfNG_interface was requested
* still remains */
return OGS_OK;
}
}
/* All GNB_UE context
* where PartOfNG_interface was requested
* REMOVED */
ogs_assert(gnb->ng_reset_ack);
r = ngap_send_to_gnb(
gnb, gnb->ng_reset_ack, NGAP_NON_UE_SIGNALLING);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
/* Clear NG-Reset Ack Buffer */
gnb->ng_reset_ack = NULL;
} else {
ogs_warn("[%s] RAN-NG Context has already been removed",
amf_ue->supi);
}
/*
* When AMF release the NAS signalling connection,
* ran_ue context is removed by ran_ue_remove() and
* amf_ue/ran_ue is de-associated by amf_ue_deassociate().
*
* In this case, implicit deregistration is attempted
* by the mobile reachable timer according to the standard document,
* and amf_ue will be removed by amf_ue_remove().
*
* TS 24.501
* 5.3.7 Handling of the periodic registration update timer and
*
* Start AMF_TIMER_MOBILE_REACHABLE
* mobile reachable timer
* The network supervises the periodic registration update procedure
* of the UE by means of the mobile reachable timer.
* If the UE is not registered for emergency services,
* the mobile reachable timer shall be longer than the value of timer
* T3512. In this case, by default, the mobile reachable timer is
* 4 minutes greater than the value of timer T3512.
* The mobile reachable timer shall be reset and started with the
* value as indicated above, when the AMF releases the NAS signalling
* connection for the UE.
*
* TODO: If the UE is registered for emergency services, the AMF shall
* set the mobile reachable timer with a value equal to timer T3512.
*/
ogs_timer_start(amf_ue->mobile_reachable.timer,
ogs_time_from_sec(
amf_self()->time.t3512.value + 240));
}
} else {
ogs_error("Invalid STATE[%d]", state);
ogs_assert_if_reached();
}
/*
* If resource-status has already been updated by
* notify(/namf-callback/v1/{supi}/sm-context-status/{psi})
* Remove 'amf_sess_t' context to call
* amf_nsmf_pdusession_handle_release_sm_context().
*/
ogs_info("[%s:%d:%d][%d:%d:%s] "
"/nsmf-pdusession/v1/sm-contexts/{smContextRef}/modify",
amf_ue->supi, sess->psi, state,
sess->n1_released, sess->n2_released,
OpenAPI_resource_status_ToString(sess->resource_status));
if (sess->n1_released == true &&
sess->n2_released == true &&
sess->resource_status == OpenAPI_resource_status_RELEASED) {
amf_nsmf_pdusession_handle_release_sm_context(
sess, AMF_RELEASE_SM_CONTEXT_NO_STATE);
}
}
} else {
OpenAPI_sm_context_update_error_t *SmContextUpdateError = NULL;
OpenAPI_ext_problem_details_t *ProblemDetails = NULL;
OpenAPI_ref_to_binary_data_t *n1SmMsg = NULL;
ogs_pkbuf_t *n1smbuf = NULL;
#if 0 /* Is it needed? */
OpenAPI_ref_to_binary_data_t *n2SmInfo = NULL;
ogs_pkbuf_t *n2smbuf = NULL;
#endif
amf_ue = sess->amf_ue;
ogs_assert(amf_ue);
SmContextUpdateError = recvmsg->SmContextUpdateError;
if (!SmContextUpdateError) {
ogs_error("[%d:%d] No SmContextUpdateError [%d]",
sess->psi, sess->pti, recvmsg->res_status);
r = ngap_send_error_indication2(ran_ue,
NGAP_Cause_PR_protocol, NGAP_CauseProtocol_semantic_error);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
return OGS_ERROR;
}
ProblemDetails = SmContextUpdateError->error;
if (!ProblemDetails) {
ogs_error("[%d:%d] No ProblemDetails [%d]",
sess->psi, sess->pti, recvmsg->res_status);
r = ngap_send_error_indication2(ran_ue,
NGAP_Cause_PR_protocol, NGAP_CauseProtocol_semantic_error);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
return OGS_ERROR;
}
if (state == AMF_UPDATE_SM_CONTEXT_SERVICE_REQUEST) {
/*
* In a situation where the UPF is changed through High Availability
* it is implemented to send the Service-Accept to the UE
* even if reactivation for user-resource fails.
*
* This is because it cannot be predicted whether a UE will
* retransmit or leave it as it is, depending on the manufacturer,
* in case of including reactivation error IE
* such as Insufficient Resource.
*
* TS24.501
* 5.6 5GMM connection management procedures
* 5.6.1 Service request procedure
* 5.6.1.4 Service request procedure accepted by the network
* 5.6.1.4.1 UE is not using 5GS services
* with control plane CIoT 5GS optimization
*
* NOTE 1: It is up to UE implementation when to re-send a request
* for user-plane re-establishment for the associated PDU session
* after receiving a PDU session reactivation result error cause IE
* with a 5GMM cause set to #92 "insufficient user-plane resources
* for the PDU session".
*/
ogs_error("Service-Request: ACTIVATING FAILED [%d:%s:%s]",
recvmsg->res_status,
OpenAPI_up_cnx_state_ToString(
SmContextUpdateError->up_cnx_state),
ProblemDetails->cause ? ProblemDetails->cause : "Unknown");
if (AMF_SESSION_SYNC_DONE(amf_ue,
AMF_UPDATE_SM_CONTEXT_SERVICE_REQUEST)) {
r = nas_5gs_send_service_accept(amf_ue);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
}
return OGS_OK;
}
n1SmMsg = SmContextUpdateError->n1_sm_msg;
if (n1SmMsg && n1SmMsg->content_id) {
n1smbuf = ogs_sbi_find_part_by_content_id(
recvmsg, n1SmMsg->content_id);
if (n1smbuf) {
/*
* NOTE : The pkbuf created in the SBI message will be removed
* from ogs_sbi_message_free(), so it must be copied.
*/
ogs_error("[%d:%d] PDU session establishment reject [state:%d]",
sess->psi, sess->pti, state);
n1smbuf = ogs_pkbuf_copy(n1smbuf);
ogs_assert(n1smbuf);
r = nas_5gs_send_gsm_reject(ran_ue, sess,
OGS_NAS_PAYLOAD_CONTAINER_N1_SM_INFORMATION, n1smbuf);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
return OGS_ERROR;
}
}
#if 0 /* Is it needed? */
n2SmInfo = SmContextUpdateError->n2_sm_info;
if (!n2SmInfo || !n2SmInfo->content_id) {
ogs_error("[%d:%d] No N2 SM Message", sess->psi, sess->pti);
r = ngap_send_error_indication2(ran_ue,
NGAP_Cause_PR_protocol, NGAP_CauseProtocol_semantic_error);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
return OGS_ERROR;
}
n2smbuf = ogs_sbi_find_part_by_content_id(
recvmsg, n2SmInfo->content_id);
if (!n2smbuf) {
ogs_error("[%d:%d] No N2 SM Content [%s]",
sess->psi, sess->pti, n2SmInfo->content_id);
r = ngap_send_error_indication2(ran_ue,
NGAP_Cause_PR_protocol, NGAP_CauseProtocol_semantic_error);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
return OGS_ERROR;
}
#endif
ogs_error("[%d:%d] Error Indication [state:%d]",
sess->psi, sess->pti, state);
r = ngap_send_error_indication2(ran_ue,
NGAP_Cause_PR_protocol, NGAP_CauseProtocol_semantic_error);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
return OGS_ERROR;
}
return OGS_OK;
}
int amf_nsmf_pdusession_handle_release_sm_context(amf_sess_t *sess, int state)
{
int r;
amf_ue_t *amf_ue = NULL;
ran_ue_t *ran_ue = NULL;
ogs_assert(sess);
sess = amf_sess_cycle(sess);
if (!sess) {
ogs_error("Session has already been removed");
return OGS_ERROR;
}
amf_ue = amf_ue_cycle(sess->amf_ue);
if (!amf_ue) {
ogs_error("UE(amf_ue) Context has already been removed");
return OGS_ERROR;
}
ran_ue = ran_ue_cycle(sess->ran_ue);
/*
* To check if Reactivation Request has been used.
*
* During the PFCP recovery process,
* when a Reactivation Request is sent to PDU session release command,
* the UE simultaneously sends PDU session release complete and
* PDU session establishment request.
*
* In this case, old_gsm_type is PDU session release command and
* current_gsm_type is PDU session establishment request.
*/
if (sess->old_gsm_type == OGS_NAS_5GS_PDU_SESSION_RELEASE_COMPLETE &&
sess->current_gsm_type ==
OGS_NAS_5GS_PDU_SESSION_ESTABLISHMENT_REQUEST) {
ogs_error("[%s:%d] Do not remove Session due to Reactivation-requested",
amf_ue->supi, sess->psi);
/*
* Issue #2917
*
* These are variables that need to be initialized
* when a PDU session release command with a Reactivation Request
* and a PDU session release complete are sent at the same time.
*
* It is important to note that XXX_gsm_type, which is initialized now,
* has a different initialization location than
* pdu_session_release_complete_received/
* pdu_session_resource_release_response_received
*
* XXX_received is initialized in the ESTABLISHMENT phase,
* but XXX_gsm_type must be initialized in the RELEASE phase.
*/
sess->old_gsm_type = 0;
sess->current_gsm_type = 0;
sess->n1_released = false;
sess->n2_released = false;
sess->resource_status = OpenAPI_resource_status_NULL;
} else {
ogs_info("[%s:%d] Release SM Context [state:%d]",
amf_ue->supi, sess->psi, state);
AMF_SESS_CLEAR(sess);
}
if (state == AMF_RELEASE_SM_CONTEXT_REGISTRATION_ACCEPT) {
/*
* 1. Registration request
* 2. Release All SM contexts
* 3. Registration accept
*/
if (AMF_SESSION_SYNC_DONE(
amf_ue, AMF_RELEASE_SM_CONTEXT_REGISTRATION_ACCEPT) &&
AMF_SESSION_SYNC_DONE(
amf_ue, AMF_UPDATE_SM_CONTEXT_REGISTRATION_REQUEST)) {
if (ran_ue) {
if (!PCF_AM_POLICY_ASSOCIATED(amf_ue)) {
r = amf_ue_sbi_discover_and_send(
OGS_SBI_SERVICE_TYPE_NPCF_AM_POLICY_CONTROL, NULL,
amf_npcf_am_policy_control_build_create,
amf_ue, 0, NULL);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
} else {
CLEAR_AMF_UE_TIMER(amf_ue->t3550);
r = nas_5gs_send_registration_accept(amf_ue);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
}
} else {
ogs_warn("[%s] RAN-NG Context has already been removed",
amf_ue->supi);
}
}
} else if (state == AMF_RELEASE_SM_CONTEXT_SERVICE_ACCEPT) {
/*
* 1. Service request
* 2. Release All SM contexts
* 3. Service accept
*/
if (AMF_SESSION_SYNC_DONE(amf_ue,
AMF_RELEASE_SM_CONTEXT_SERVICE_ACCEPT) &&
AMF_SESSION_SYNC_DONE(amf_ue,
AMF_UPDATE_SM_CONTEXT_SERVICE_REQUEST)) {
r = nas_5gs_send_service_accept(amf_ue);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
}
} else {
if (AMF_SESSION_SYNC_DONE(amf_ue, state)) {
if (state == AMF_RELEASE_SM_CONTEXT_NG_CONTEXT_REMOVE) {
/*
* 1. Initial context setup failure
* 2. Release All SM contexts
* 3. UE Context release command
* 4. UE Context release complete
*/
r = ngap_send_amf_ue_context_release_command(amf_ue,
NGAP_Cause_PR_nas, NGAP_CauseNas_normal_release,
NGAP_UE_CTX_REL_NG_CONTEXT_REMOVE, 0);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
} else if (state == AMF_RELEASE_SM_CONTEXT_REGISTRATION_ACCEPT) {
/* Not reached here */
ogs_assert_if_reached();
} else if (state == AMF_RELEASE_SM_CONTEXT_SERVICE_ACCEPT) {
/* Not reached here */
ogs_assert_if_reached();
} else if (state == AMF_UE_INITIATED_DE_REGISTERED) {
if (OGS_FSM_CHECK(&amf_ue->sm, gmm_state_de_registered)) {
/*
* 1. PDU session establishment request
* 2. PDUSessionResourceSetupRequest +
* PDU session establishment accept
* 3. PDUSessionResourceSetupResponse
* 4. Deregistration request
* 5. UEContextReleaseCommand
* 6. UEContextReleaseComplete
*/
if (UDM_SDM_SUBSCRIBED(amf_ue)) {
r = amf_ue_sbi_discover_and_send(
OGS_SBI_SERVICE_TYPE_NUDM_SDM, NULL,
amf_nudm_sdm_build_subscription_delete,
amf_ue, state, NULL);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
} else if (PCF_AM_POLICY_ASSOCIATED(amf_ue)) {
r = amf_ue_sbi_discover_and_send(
OGS_SBI_SERVICE_TYPE_NPCF_AM_POLICY_CONTROL,
NULL,
amf_npcf_am_policy_control_build_delete,
amf_ue, state, NULL);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
} else {
r = nas_5gs_send_de_registration_accept(amf_ue);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
}
} else if (OGS_FSM_CHECK(&amf_ue->sm,
gmm_state_authentication)) {
ogs_fatal("Release SM Context in authentication");
ogs_assert_if_reached();
} else if (OGS_FSM_CHECK(
&amf_ue->sm, gmm_state_security_mode)) {
ogs_fatal("Release SM Context in security-mode");
ogs_assert_if_reached();
} else if (OGS_FSM_CHECK(&amf_ue->sm,
gmm_state_initial_context_setup)) {
ogs_fatal("Release SM Context in initial-context-setup");
ogs_assert_if_reached();
} else if (OGS_FSM_CHECK(&amf_ue->sm, gmm_state_registered)) {
ogs_fatal("Release SM Context in registered");
ogs_assert_if_reached();
} else if (OGS_FSM_CHECK(&amf_ue->sm, gmm_state_exception)) {
ogs_fatal("Release SM Context in exception");
ogs_assert_if_reached();
} else {
ogs_fatal("Release SM Context : INVALID STATE");
ogs_assert_if_reached();
}
} else if (state == AMF_NETWORK_INITIATED_IMPLICIT_DE_REGISTERED ||
state == AMF_NETWORK_INITIATED_EXPLICIT_DE_REGISTERED) {
if (OGS_FSM_CHECK(&amf_ue->sm, gmm_state_de_registered)) {
ogs_fatal("Release SM Context in de-registered");
ogs_assert_if_reached();
} else if (OGS_FSM_CHECK(&amf_ue->sm,
gmm_state_authentication)) {
ogs_fatal("Release SM Context in authentication");
ogs_assert_if_reached();
} else if (OGS_FSM_CHECK(
&amf_ue->sm, gmm_state_security_mode)) {
ogs_fatal("Release SM Context in security-mode");
ogs_assert_if_reached();
} else if (OGS_FSM_CHECK(&amf_ue->sm,
gmm_state_initial_context_setup)) {
ogs_fatal("Release SM Context in initial-context-setup");
ogs_assert_if_reached();
} else if (OGS_FSM_CHECK(&amf_ue->sm, gmm_state_registered)) {
/*
* 1. Network-Initiated Implict-Explicit De-Registered
* 5. Deregistration request
* 5. Deregistration accept
* 6. UEContextReleaseCommand
* 7. UEContextReleaseComplete
*/
if (UDM_SDM_SUBSCRIBED(amf_ue)) {
r = amf_ue_sbi_discover_and_send(
OGS_SBI_SERVICE_TYPE_NUDM_SDM, NULL,
amf_nudm_sdm_build_subscription_delete,
amf_ue, state, NULL);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
} else if (PCF_AM_POLICY_ASSOCIATED(amf_ue)) {
r = amf_ue_sbi_discover_and_send(
OGS_SBI_SERVICE_TYPE_NPCF_AM_POLICY_CONTROL,
NULL,
amf_npcf_am_policy_control_build_delete,
amf_ue, state, NULL);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
}
} else if (OGS_FSM_CHECK(&amf_ue->sm, gmm_state_exception)) {
ogs_fatal("Release SM Context in exception");
ogs_assert_if_reached();
} else {
ogs_fatal("Release SM Context : INVALID STATE");
ogs_assert_if_reached();
}
} else if (state == AMF_RELEASE_SM_CONTEXT_NO_STATE) {
/* NO_STATE */
if (OGS_FSM_CHECK(&amf_ue->sm, gmm_state_de_registered)) {
/*
* 1. PDU session release request
* 2. PDUSessionResourceReleaseCommand +
* PDU session release command
* 3. PDUSessionResourceReleaseREsponse
* 4. PDU session release complete
* 5. Deregistration request
* 6. UEContextReleaseCommand
* 7. UEContextReleaseComplete
*/
if (UDM_SDM_SUBSCRIBED(amf_ue)) {
r = amf_ue_sbi_discover_and_send(
OGS_SBI_SERVICE_TYPE_NUDM_SDM, NULL,
amf_nudm_sdm_build_subscription_delete,
amf_ue, state, NULL);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
} else if (PCF_AM_POLICY_ASSOCIATED(amf_ue)) {
r = amf_ue_sbi_discover_and_send(
OGS_SBI_SERVICE_TYPE_NPCF_AM_POLICY_CONTROL,
NULL,
amf_npcf_am_policy_control_build_delete,
amf_ue, state, NULL);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
} else {
r = nas_5gs_send_de_registration_accept(amf_ue);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
}
} else if (OGS_FSM_CHECK(&amf_ue->sm,
gmm_state_authentication)) {
r = amf_ue_sbi_discover_and_send(
OGS_SBI_SERVICE_TYPE_NAUSF_AUTH, NULL,
amf_nausf_auth_build_authenticate,
amf_ue, 0, NULL);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
} else if (OGS_FSM_CHECK(
&amf_ue->sm, gmm_state_security_mode)) {
ogs_fatal("Release SM Context in security-mode");
ogs_assert_if_reached();
} else if (OGS_FSM_CHECK(&amf_ue->sm,
gmm_state_initial_context_setup)) {
ogs_fatal("Release SM Context in initial-context-setup");
ogs_assert_if_reached();
} else if (OGS_FSM_CHECK(&amf_ue->sm, gmm_state_registered)) {
/*
* 1. PDU session release request
* 2. PDUSessionResourceReleaseCommand +
* PDU session release command
* 3. PDUSessionResourceReleaseREsponse
* 4. PDU session release complete
*
* So, Nothing to do!
*/
} else if (OGS_FSM_CHECK(&amf_ue->sm, gmm_state_exception)) {
/*
* 1. GMM Exception
* 2. Release All SM contexts
* 3. UE Context release command
* 4. UE Context release complete
*/
r = ngap_send_amf_ue_context_release_command(amf_ue,
NGAP_Cause_PR_nas, NGAP_CauseNas_normal_release,
NGAP_UE_CTX_REL_UE_CONTEXT_REMOVE, 0);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
} else {
ogs_fatal("Release SM Context : INVALID STATE");
ogs_assert_if_reached();
}
} else {
ogs_fatal("Release SM STATE undefined");
ogs_assert_if_reached();
}
}
}
return OGS_OK;
}
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