forked from acouzens/open5gs
331 lines
9.5 KiB
C
331 lines
9.5 KiB
C
/*
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* Copyright (C) 2019,2020 by Sukchan Lee <acetcom@gmail.com>
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*
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* This file is part of Open5GS.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "sbi-path.h"
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#include "nas-path.h"
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#include "nausf-build.h"
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#include "nudm-build.h"
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static int server_cb(ogs_sbi_request_t *request, void *data)
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{
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amf_event_t *e = NULL;
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int rv;
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ogs_assert(request);
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ogs_assert(data);
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e = amf_event_new(AMF_EVT_SBI_SERVER);
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ogs_assert(e);
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e->sbi.request = request;
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e->sbi.data = data;
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rv = ogs_queue_push(ogs_app()->queue, e);
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if (rv != OGS_OK) {
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ogs_warn("ogs_queue_push() failed:%d", (int)rv);
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amf_event_free(e);
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return OGS_ERROR;
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}
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return OGS_OK;
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}
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static int client_cb(ogs_sbi_response_t *response, void *data)
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{
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amf_event_t *e = NULL;
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int rv;
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ogs_assert(response);
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e = amf_event_new(AMF_EVT_SBI_CLIENT);
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ogs_assert(e);
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e->sbi.response = response;
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e->sbi.data = data;
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rv = ogs_queue_push(ogs_app()->queue, e);
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if (rv != OGS_OK) {
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ogs_warn("ogs_queue_push() failed:%d", (int)rv);
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amf_event_free(e);
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return OGS_ERROR;
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}
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return OGS_OK;
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}
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int amf_sbi_open(void)
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{
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ogs_sbi_nf_instance_t *nf_instance = NULL;
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ogs_sbi_server_start_all(server_cb);
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/*
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* The connection between NF and NRF is a little special.
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*
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* NF and NRF share nf_instance. I get the NRF EndPoint(client) information
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* the configuration file via lib/sbi/context.c.
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*
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* ogs_sbi_self()->nf_instance_id means NF's InstanceId.
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*/
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ogs_list_for_each(&ogs_sbi_self()->nf_instance_list, nf_instance) {
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ogs_sbi_nf_service_t *service = NULL;
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ogs_sbi_client_t *client = NULL;
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/* Build NF instance information. It will be transmitted to NRF. */
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ogs_sbi_nf_instance_build_default(nf_instance, amf_self()->nf_type);
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/* Build NF service information. It will be transmitted to NRF. */
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service = ogs_sbi_nf_service_build_default(nf_instance,
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(char*)OGS_SBI_SERVICE_NAME_NAMF_COMM);
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ogs_assert(service);
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ogs_sbi_nf_service_add_version(service, (char*)OGS_SBI_API_V1,
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(char*)OGS_SBI_API_V1_0_0, NULL);
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/* Client callback is only used when NF sends to NRF */
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client = nf_instance->client;
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ogs_assert(client);
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client->cb = client_cb;
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/* NFRegister is sent and the response is received
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* by the above client callback. */
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amf_nf_fsm_init(nf_instance);
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}
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return OGS_OK;
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}
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void amf_sbi_close(void)
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{
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ogs_sbi_server_stop_all();
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}
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void amf_sbi_send(ogs_sbi_nf_instance_t *nf_instance, ogs_sbi_xact_t *xact)
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{
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ogs_sbi_send(nf_instance, client_cb, xact);
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}
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void amf_ue_sbi_discover_and_send(
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OpenAPI_nf_type_e target_nf_type, amf_ue_t *amf_ue, void *data,
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ogs_sbi_request_t *(*build)(amf_ue_t *amf_ue, void *data))
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{
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ogs_sbi_xact_t *xact = NULL;
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ogs_assert(target_nf_type);
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ogs_assert(amf_ue);
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ogs_assert(build);
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xact = ogs_sbi_xact_add(target_nf_type, &amf_ue->sbi,
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(ogs_sbi_build_f)build, amf_ue, data,
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amf_timer_sbi_client_wait_expire);
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if (!xact) {
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ogs_error("amf_ue_sbi_discover_and_send() failed");
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nas_5gs_send_gmm_reject_from_sbi(
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amf_ue, OGS_SBI_HTTP_STATUS_GATEWAY_TIMEOUT);
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return;
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}
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if (ogs_sbi_discover_and_send(xact,
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(ogs_fsm_handler_t)amf_nf_state_registered, client_cb) != true) {
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ogs_error("amf_ue_sbi_discover_and_send() failed");
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nas_5gs_send_gmm_reject_from_sbi(
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amf_ue, OGS_SBI_HTTP_STATUS_GATEWAY_TIMEOUT);
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return;
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}
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}
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void amf_sess_sbi_discover_and_send(OpenAPI_nf_type_e target_nf_type,
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amf_sess_t *sess, int state, void *data,
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ogs_sbi_request_t *(*build)(amf_sess_t *sess, void *data))
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{
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ogs_sbi_xact_t *xact = NULL;
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ogs_assert(target_nf_type);
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ogs_assert(sess);
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ogs_assert(build);
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xact = ogs_sbi_xact_add(target_nf_type, &sess->sbi,
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(ogs_sbi_build_f)build, sess, data,
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amf_timer_sbi_client_wait_expire);
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if (!xact) {
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ogs_error("amf_sess_sbi_discover_and_send() failed");
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nas_5gs_send_back_5gsm_message_from_sbi(
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sess, OGS_SBI_HTTP_STATUS_GATEWAY_TIMEOUT);
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return;
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}
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xact->state = state;
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if (ogs_sbi_discover_and_send(xact,
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(ogs_fsm_handler_t)amf_nf_state_registered, client_cb) != true) {
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ogs_error("amf_sess_sbi_discover_and_send() failed");
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nas_5gs_send_back_5gsm_message_from_sbi(
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sess, OGS_SBI_HTTP_STATUS_GATEWAY_TIMEOUT);
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return;
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}
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}
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void amf_sbi_send_activating_session(amf_sess_t *sess, int state)
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{
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amf_nsmf_pdusession_update_sm_context_param_t param;
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ogs_assert(sess);
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memset(¶m, 0, sizeof(param));
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param.upCnxState = OpenAPI_up_cnx_state_ACTIVATING;
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amf_sess_sbi_discover_and_send(OpenAPI_nf_type_SMF,
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sess, state, ¶m,
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amf_nsmf_pdusession_build_update_sm_context);
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}
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void amf_sbi_send_deactivate_session(
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amf_sess_t *sess, int state, int group, int cause)
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{
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amf_nsmf_pdusession_update_sm_context_param_t param;
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ogs_assert(sess);
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memset(¶m, 0, sizeof(param));
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param.upCnxState = OpenAPI_up_cnx_state_DEACTIVATED;
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param.ngApCause.group = group;
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param.ngApCause.value = cause;
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param.ue_location = true;
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param.ue_timezone = true;
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amf_sess_sbi_discover_and_send(OpenAPI_nf_type_SMF,
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sess, state, ¶m, amf_nsmf_pdusession_build_update_sm_context);
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}
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void amf_sbi_send_deactivate_all_sessions(
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amf_ue_t *amf_ue, int state, int group, int cause)
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{
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amf_sess_t *sess = NULL;
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ogs_assert(amf_ue);
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ogs_list_for_each(&amf_ue->sess_list, sess) {
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if (SESSION_CONTEXT_IN_SMF(sess))
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amf_sbi_send_deactivate_session(sess, state, group, cause);
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}
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}
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void amf_sbi_send_deactivate_all_ue_in_gnb(amf_gnb_t *gnb, int state)
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{
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amf_ue_t *amf_ue = NULL;
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ran_ue_t *ran_ue = NULL, *ran_ue_next;
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ogs_list_for_each_safe(&gnb->ran_ue_list, ran_ue_next, ran_ue) {
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int old_xact_count = 0, new_xact_count = 0;
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amf_ue = ran_ue->amf_ue;
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if (amf_ue) {
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old_xact_count = amf_sess_xact_count(amf_ue);
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amf_sbi_send_deactivate_all_sessions(
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amf_ue, state, NGAP_Cause_PR_radioNetwork,
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NGAP_CauseRadioNetwork_failure_in_radio_interface_procedure);
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new_xact_count = amf_sess_xact_count(amf_ue);
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if (old_xact_count == new_xact_count) {
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ran_ue_remove(ran_ue);
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amf_ue_deassociate(amf_ue);
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}
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} else {
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ogs_warn("amf_sbi_send_deactivate_all_ue_in_gnb()");
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ogs_warn(" RAN_UE_NGAP_ID[%d] AMF_UE_NGAP_ID[%lld] State[%d]",
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ran_ue->ran_ue_ngap_id, (long long)ran_ue->amf_ue_ngap_id,
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state);
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if (state == AMF_REMOVE_S1_CONTEXT_BY_LO_CONNREFUSED ||
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state == AMF_REMOVE_S1_CONTEXT_BY_RESET_ALL) {
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ran_ue_remove(ran_ue);
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} else {
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/* At this point, it does not support other action */
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ogs_assert_if_reached();
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}
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}
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}
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}
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void amf_sbi_send_release_session(amf_sess_t *sess, int state)
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{
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ogs_assert(sess);
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amf_sess_sbi_discover_and_send(
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OpenAPI_nf_type_SMF, sess, state, NULL,
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amf_nsmf_pdusession_build_release_sm_context);
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/* Prevent to invoke SMF for this session */
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CLEAR_SM_CONTEXT_REF(sess);
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}
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void amf_sbi_send_release_all_sessions(amf_ue_t *amf_ue, int state)
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{
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amf_sess_t *sess = NULL;
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ogs_assert(amf_ue);
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ogs_list_for_each(&amf_ue->sess_list, sess) {
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if (SESSION_CONTEXT_IN_SMF(sess))
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amf_sbi_send_release_session(sess, state);
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}
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}
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static int client_notify_cb(ogs_sbi_response_t *response, void *data)
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{
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int rv;
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ogs_sbi_message_t message;
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ogs_assert(response);
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rv = ogs_sbi_parse_response(&message, response);
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if (rv != OGS_OK) {
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ogs_error("cannot parse HTTP response");
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ogs_sbi_message_free(&message);
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ogs_sbi_response_free(response);
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return OGS_ERROR;
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}
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if (message.res_status != OGS_SBI_HTTP_STATUS_NO_CONTENT)
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ogs_error("N1-N2-Message Transfer Failure Notification failed [%d]",
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message.res_status);
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ogs_sbi_message_free(&message);
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ogs_sbi_response_free(response);
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return OGS_OK;
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}
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void amf_sbi_send_n1_n2_failure_notify(
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amf_sess_t *sess, OpenAPI_n1_n2_message_transfer_cause_e cause)
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{
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ogs_sbi_request_t *request = NULL;
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ogs_sbi_client_t *client = NULL;
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ogs_assert(cause);
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ogs_assert(sess);
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client = sess->paging.client;
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ogs_assert(client);
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request = amf_nsmf_callback_build_n1_n2_failure_notify(sess, cause);
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ogs_assert(request);
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ogs_sbi_client_send_request(client, client_notify_cb, request, NULL);
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}
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