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/*
* Copyright (C) 2019-2022 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 "sbi-path.h"
#include "nas-path.h"
#include "ngap-path.h"
#include "nnrf-handler.h"
void amf_nnrf_handle_nf_discover(
ogs_sbi_xact_t *xact, ogs_sbi_message_t *recvmsg)
{
int r;
ogs_sbi_nf_instance_t *nf_instance = NULL;
ogs_sbi_object_t *sbi_object = NULL;
ogs_sbi_service_type_e service_type = OGS_SBI_SERVICE_TYPE_NULL;
OpenAPI_nf_type_e requester_nf_type = OpenAPI_nf_type_NULL;
ogs_sbi_discovery_option_t *discovery_option = NULL;
OpenAPI_search_result_t *SearchResult = NULL;
ogs_assert(recvmsg);
ogs_assert(xact);
sbi_object = xact->sbi_object;
ogs_assert(sbi_object);
service_type = xact->service_type;
ogs_assert(service_type);
requester_nf_type = xact->requester_nf_type;
ogs_assert(requester_nf_type);
discovery_option = xact->discovery_option;
SearchResult = recvmsg->SearchResult;
if (!SearchResult) {
ogs_error("No SearchResult");
return;
}
ogs_nnrf_disc_handle_nf_discover_search_result(SearchResult);
amf_sbi_select_nf(sbi_object,
service_type, requester_nf_type, discovery_option);
nf_instance = OGS_SBI_GET_NF_INSTANCE(
sbi_object->service_type_array[service_type]);
if (!nf_instance) {
amf_ue_t *amf_ue = NULL;
amf_sess_t *sess = NULL;
ogs_assert(sbi_object->type > OGS_SBI_OBJ_BASE &&
sbi_object->type < OGS_SBI_OBJ_TOP);
switch(sbi_object->type) {
case OGS_SBI_OBJ_UE_TYPE:
amf_ue = (amf_ue_t *)sbi_object;
ogs_assert(amf_ue);
ogs_error("[%s] (NF discover) No [%s]", amf_ue->suci,
ogs_sbi_service_type_to_name(service_type));
r = nas_5gs_send_gmm_reject_from_sbi(amf_ue,
OGS_SBI_HTTP_STATUS_GATEWAY_TIMEOUT);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
break;
case OGS_SBI_OBJ_SESS_TYPE:
sess = (amf_sess_t *)sbi_object;
ogs_assert(sess);
ogs_error("[%d:%d] (NF discover) No [%s]", sess->psi, sess->pti,
ogs_sbi_service_type_to_name(service_type));
if (sess->payload_container_type) {
r = nas_5gs_send_back_gsm_message(
ran_ue_find_by_id(sess->ran_ue_id), sess,
OGS_5GMM_CAUSE_PAYLOAD_WAS_NOT_FORWARDED,
AMF_NAS_BACKOFF_TIME);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
} else {
r = ngap_send_error_indication2(
ran_ue_find_by_id(sess->ran_ue_id),
NGAP_Cause_PR_transport,
NGAP_CauseTransport_transport_resource_unavailable);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
}
break;
default:
ogs_fatal("(NF discover) Not implemented [%s:%d]",
ogs_sbi_service_type_to_name(service_type), sbi_object->type);
ogs_assert_if_reached();
}
return;
}
ogs_expect(true == amf_sbi_send_request(nf_instance, xact));
}
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