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open5gs/src/nrf/nf-sm.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 "context.h"
#include "sbi-path.h"
#include "nnrf-handler.h"
void nrf_nf_fsm_init(ogs_sbi_nf_instance_t *nf_instance)
{
nrf_event_t e;
ogs_assert(nf_instance);
memset(&e, 0, sizeof(e));
e.nf_instance = nf_instance;
ogs_fsm_init(&nf_instance->sm,
nrf_nf_state_initial, nrf_nf_state_final, &e);
}
void nrf_nf_fsm_fini(ogs_sbi_nf_instance_t *nf_instance)
{
nrf_event_t e;
ogs_assert(nf_instance);
memset(&e, 0, sizeof(e));
e.nf_instance = nf_instance;
ogs_fsm_fini(&nf_instance->sm, &e);
}
void nrf_nf_state_initial(ogs_fsm_t *s, nrf_event_t *e)
{
ogs_sbi_nf_instance_t *nf_instance = NULL;
ogs_assert(s);
ogs_assert(e);
nrf_sm_debug(e);
nf_instance = e->nf_instance;
ogs_assert(nf_instance);
nf_instance->t_no_heartbeat = ogs_timer_add(ogs_app()->timer_mgr,
nrf_timer_nf_instance_no_heartbeat, nf_instance);
ogs_assert(nf_instance->t_no_heartbeat);
OGS_FSM_TRAN(s, &nrf_nf_state_will_register);
}
void nrf_nf_state_final(ogs_fsm_t *s, nrf_event_t *e)
{
ogs_sbi_nf_instance_t *nf_instance = NULL;
ogs_assert(s);
ogs_assert(e);
nrf_sm_debug(e);
nf_instance = e->nf_instance;
ogs_assert(nf_instance);
ogs_timer_delete(nf_instance->t_no_heartbeat);
}
void nrf_nf_state_will_register(ogs_fsm_t *s, nrf_event_t *e)
{
bool handled;
ogs_sbi_nf_instance_t *nf_instance = NULL;
ogs_sbi_stream_t *stream = NULL;
ogs_sbi_message_t *message = NULL;
ogs_assert(s);
ogs_assert(e);
nrf_sm_debug(e);
nf_instance = e->nf_instance;
ogs_assert(nf_instance);
switch (e->h.id) {
case OGS_FSM_ENTRY_SIG:
break;
case OGS_FSM_EXIT_SIG:
break;
case OGS_EVENT_SBI_SERVER:
message = e->h.sbi.message;
ogs_assert(message);
stream = e->h.sbi.data;
ogs_assert(stream);
SWITCH(message->h.service.name)
CASE(OGS_SBI_SERVICE_NAME_NNRF_NFM)
SWITCH(message->h.resource.component[0])
CASE(OGS_SBI_RESOURCE_NAME_NF_INSTANCES)
SWITCH(message->h.method)
CASE(OGS_SBI_HTTP_METHOD_PUT)
handled = nrf_nnrf_handle_nf_register(
nf_instance, stream, message);
if (handled == false)
OGS_FSM_TRAN(s, nrf_nf_state_exception);
break;
DEFAULT
ogs_error("[%s] Invalid HTTP method [%s]",
nf_instance->id, message->h.method);
ogs_assert(true ==
ogs_sbi_server_send_error(stream,
OGS_SBI_HTTP_STATUS_METHOD_NOT_ALLOWED, message,
"Invalid HTTP method", message->h.method, NULL));
END
break;
DEFAULT
ogs_error("[%s] Invalid resource name [%s]",
nf_instance->id, message->h.resource.component[0]);
ogs_assert(true ==
ogs_sbi_server_send_error(stream,
OGS_SBI_HTTP_STATUS_METHOD_NOT_ALLOWED, message,
"Invalid resource name",
message->h.resource.component[0], NULL));
END
break;
DEFAULT
ogs_error("[%s] Invalid API name [%s]",
nf_instance->id, message->h.service.name);
ogs_assert(true ==
ogs_sbi_server_send_error(stream,
OGS_SBI_HTTP_STATUS_METHOD_NOT_ALLOWED, message,
"Invalid resource name", message->h.service.name,
NULL));
END
OGS_FSM_TRAN(s, nrf_nf_state_registered);
break;
default:
ogs_error("[%s] Unknown event %s",
nf_instance->id, nrf_event_get_name(e));
ogs_assert(true ==
ogs_sbi_server_send_error(stream,
OGS_SBI_HTTP_STATUS_INTERNAL_SERVER_ERROR,
message, "Unknown event", nrf_event_get_name(e),
NULL));
OGS_FSM_TRAN(s, nrf_nf_state_exception);
break;
}
}
void nrf_nf_state_registered(ogs_fsm_t *s, nrf_event_t *e)
{
bool handled;
ogs_sbi_nf_instance_t *nf_instance = NULL;
ogs_sbi_stream_t *stream = NULL;
ogs_sbi_message_t *message = NULL;
ogs_sbi_response_t *response = NULL;
ogs_assert(s);
ogs_assert(e);
nrf_sm_debug(e);
nf_instance = e->nf_instance;
ogs_assert(nf_instance);
switch (e->h.id) {
case OGS_FSM_ENTRY_SIG:
ogs_info("[%s] NF registered [Heartbeat:%ds]",
nf_instance->id, nf_instance->time.heartbeat_interval);
if (nf_instance->time.heartbeat_interval) {
ogs_timer_start(nf_instance->t_no_heartbeat,
ogs_time_from_sec(
nf_instance->time.heartbeat_interval +
ogs_local_conf()->time.nf_instance.
no_heartbeat_margin));
}
ogs_assert(true ==
nrf_nnrf_nfm_send_nf_status_notify_all(
OpenAPI_notification_event_type_NF_REGISTERED, nf_instance));
break;
case OGS_FSM_EXIT_SIG:
ogs_info("[%s] NF de-registered", nf_instance->id);
if (nf_instance->time.heartbeat_interval) {
ogs_timer_stop(nf_instance->t_no_heartbeat);
}
ogs_assert(true ==
nrf_nnrf_nfm_send_nf_status_notify_all(
OpenAPI_notification_event_type_NF_DEREGISTERED, nf_instance));
break;
case OGS_EVENT_SBI_SERVER:
message = e->h.sbi.message;
ogs_assert(message);
stream = e->h.sbi.data;
ogs_assert(stream);
SWITCH(message->h.service.name)
CASE(OGS_SBI_SERVICE_NAME_NNRF_NFM)
SWITCH(message->h.resource.component[0])
CASE(OGS_SBI_RESOURCE_NAME_NF_INSTANCES)
SWITCH(message->h.method)
CASE(OGS_SBI_HTTP_METHOD_PUT)
CASE(OGS_SBI_HTTP_METHOD_PATCH)
if (nf_instance->time.heartbeat_interval) {
ogs_timer_start(nf_instance->t_no_heartbeat,
ogs_time_from_sec(
nf_instance->time.heartbeat_interval +
ogs_local_conf()->time.nf_instance.
no_heartbeat_margin));
}
handled = nrf_nnrf_handle_nf_update(
nf_instance, stream, message);
if (handled == false)
OGS_FSM_TRAN(s, nrf_nf_state_exception);
break;
CASE(OGS_SBI_HTTP_METHOD_DELETE)
response = ogs_sbi_build_response(
message, OGS_SBI_HTTP_STATUS_NO_CONTENT);
ogs_assert(response);
ogs_assert(true ==
ogs_sbi_server_send_response(stream, response));
OGS_FSM_TRAN(s, nrf_nf_state_de_registered);
break;
DEFAULT
ogs_error("[%s] Invalid HTTP method [%s]",
nf_instance->id, message->h.method);
ogs_assert(true ==
ogs_sbi_server_send_error(stream,
OGS_SBI_HTTP_STATUS_METHOD_NOT_ALLOWED, message,
"Invalid HTTP method", message->h.method, NULL));
END
break;
DEFAULT
ogs_error("[%s] Invalid resource name [%s]",
nf_instance->id, message->h.resource.component[0]);
ogs_assert(true ==
ogs_sbi_server_send_error(stream,
OGS_SBI_HTTP_STATUS_METHOD_NOT_ALLOWED, message,
"Invalid resource name",
message->h.resource.component[0], NULL));
END
break;
DEFAULT
ogs_error("[%s] Invalid API name [%s]",
nf_instance->id, message->h.service.name);
ogs_assert(true ==
ogs_sbi_server_send_error(stream,
OGS_SBI_HTTP_STATUS_METHOD_NOT_ALLOWED, message,
"Invalid resource name", message->h.service.name,
NULL));
END
break;
default:
ogs_error("[%s] Unknown event %s",
nf_instance->id, nrf_event_get_name(e));
ogs_assert(true ==
ogs_sbi_server_send_error(stream,
OGS_SBI_HTTP_STATUS_INTERNAL_SERVER_ERROR,
message, "Unknown event", nrf_event_get_name(e),
NULL));
OGS_FSM_TRAN(s, nrf_nf_state_exception);
break;
}
}
void nrf_nf_state_de_registered(ogs_fsm_t *s, nrf_event_t *e)
{
ogs_assert(s);
ogs_assert(e);
nrf_sm_debug(e);
switch (e->h.id) {
case OGS_FSM_ENTRY_SIG:
break;
case OGS_FSM_EXIT_SIG:
break;
default:
ogs_error("Unknown event %s", nrf_event_get_name(e));
break;
}
}
void nrf_nf_state_exception(ogs_fsm_t *s, nrf_event_t *e)
{
ogs_assert(s);
ogs_assert(e);
nrf_sm_debug(e);
switch (e->h.id) {
case OGS_FSM_ENTRY_SIG:
break;
case OGS_FSM_EXIT_SIG:
break;
default:
ogs_error("Unknown event %s", nrf_event_get_name(e));
break;
}
}
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