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open5gs/lib/sbi/nf-sm.c
Sukchan Lee 148ea44562 Release v2.5.6
2022-11-18 22:45:25 +09:00

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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 "ogs-sbi.h"
void ogs_sbi_nf_fsm_init(ogs_sbi_nf_instance_t *nf_instance)
{
ogs_event_t e;
ogs_assert(nf_instance);
memset(&e, 0, sizeof(e));
e.sbi.data = nf_instance;
ogs_fsm_init(&nf_instance->sm,
ogs_sbi_nf_state_initial, ogs_sbi_nf_state_final, &e);
}
void ogs_sbi_nf_fsm_tran(ogs_sbi_nf_instance_t *nf_instance, void *state)
{
ogs_event_t e;
ogs_assert(nf_instance);
memset(&e, 0, sizeof(e));
e.sbi.data = nf_instance;
ogs_fsm_tran(&nf_instance->sm, state, &e);
}
void ogs_sbi_nf_fsm_fini(ogs_sbi_nf_instance_t *nf_instance)
{
ogs_event_t e;
ogs_assert(nf_instance);
memset(&e, 0, sizeof(e));
e.sbi.data = nf_instance;
ogs_fsm_fini(&nf_instance->sm, &e);
}
void ogs_sbi_nf_state_initial(ogs_fsm_t *s, ogs_event_t *e)
{
ogs_sbi_nf_instance_t *nf_instance = NULL;
ogs_assert(s);
ogs_assert(e);
ogs_sbi_sm_debug(e);
nf_instance = e->sbi.data;
ogs_assert(nf_instance);
nf_instance->t_registration_interval = ogs_timer_add(ogs_app()->timer_mgr,
ogs_timer_nf_instance_registration_interval, nf_instance);
ogs_assert(nf_instance->t_registration_interval);
nf_instance->t_heartbeat_interval = ogs_timer_add(ogs_app()->timer_mgr,
ogs_timer_nf_instance_heartbeat_interval, nf_instance);
ogs_assert(nf_instance->t_heartbeat_interval);
nf_instance->t_no_heartbeat = ogs_timer_add(ogs_app()->timer_mgr,
ogs_timer_nf_instance_no_heartbeat, nf_instance);
ogs_assert(nf_instance->t_no_heartbeat);
nf_instance->t_validity = ogs_timer_add(ogs_app()->timer_mgr,
ogs_timer_nf_instance_validity, nf_instance);
ogs_assert(nf_instance->t_validity);
if (NF_INSTANCE_TYPE_IS_NRF(nf_instance)) {
OGS_FSM_TRAN(s, &ogs_sbi_nf_state_will_register);
} else {
ogs_assert(nf_instance->id);
OGS_FSM_TRAN(s, &ogs_sbi_nf_state_registered);
}
}
void ogs_sbi_nf_state_final(ogs_fsm_t *s, ogs_event_t *e)
{
ogs_sbi_nf_instance_t *nf_instance = NULL;
ogs_assert(s);
ogs_assert(e);
ogs_sbi_sm_debug(e);
nf_instance = e->sbi.data;
ogs_assert(nf_instance);
ogs_timer_delete(nf_instance->t_registration_interval);
ogs_timer_delete(nf_instance->t_heartbeat_interval);
ogs_timer_delete(nf_instance->t_no_heartbeat);
ogs_timer_delete(nf_instance->t_validity);
}
void ogs_sbi_nf_state_will_register(ogs_fsm_t *s, ogs_event_t *e)
{
ogs_sbi_nf_instance_t *nf_instance = NULL;
ogs_sbi_message_t *message = NULL;
ogs_assert(s);
ogs_assert(e);
ogs_sbi_sm_debug(e);
nf_instance = e->sbi.data;
ogs_assert(nf_instance);
ogs_assert(NF_INSTANCE_TYPE_IS_NRF(nf_instance));
switch (e->id) {
case OGS_FSM_ENTRY_SIG:
ogs_timer_start(nf_instance->t_registration_interval,
ogs_app()->time.message.sbi.nf_register_interval);
ogs_assert(true == ogs_nnrf_nfm_send_nf_register(nf_instance));
break;
case OGS_FSM_EXIT_SIG:
ogs_timer_stop(nf_instance->t_registration_interval);
break;
case OGS_EVENT_SBI_CLIENT:
message = e->sbi.message;
ogs_assert(message);
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)
if (message->res_status == OGS_SBI_HTTP_STATUS_OK ||
message->res_status == OGS_SBI_HTTP_STATUS_CREATED) {
ogs_nnrf_nfm_handle_nf_register(nf_instance, message);
OGS_FSM_TRAN(s, &ogs_sbi_nf_state_registered);
} else {
ogs_error("[%s] HTTP Response Status Code [%d]",
NF_INSTANCE_ID(ogs_sbi_self()->nf_instance),
message->res_status);
OGS_FSM_TRAN(s, &ogs_sbi_nf_state_exception);
}
break;
DEFAULT
ogs_error("[%s] Invalid resource name [%s]",
NF_INSTANCE_ID(ogs_sbi_self()->nf_instance),
message->h.resource.component[0]);
END
break;
DEFAULT
ogs_error("[%s] Invalid API name [%s]",
NF_INSTANCE_ID(ogs_sbi_self()->nf_instance),
message->h.service.name);
END
break;
case OGS_EVENT_SBI_TIMER:
switch(e->timer_id) {
case OGS_TIMER_NF_INSTANCE_REGISTRATION_INTERVAL:
ogs_warn("[%s] Retry to registration with NRF",
NF_INSTANCE_ID(ogs_sbi_self()->nf_instance));
ogs_timer_start(nf_instance->t_registration_interval,
ogs_app()->time.message.sbi.nf_register_interval);
ogs_assert(true == ogs_nnrf_nfm_send_nf_register(nf_instance));
break;
default:
ogs_error("[%s] Unknown timer[%s:%d]",
NF_INSTANCE_ID(ogs_sbi_self()->nf_instance),
ogs_timer_get_name(e->timer_id), e->timer_id);
}
break;
default:
ogs_error("Unknown event %s", ogs_event_get_name(e));
break;
}
}
void ogs_sbi_nf_state_registered(ogs_fsm_t *s, ogs_event_t *e)
{
ogs_sbi_nf_instance_t *nf_instance = NULL;
ogs_sbi_message_t *message = NULL;
ogs_assert(s);
ogs_assert(e);
ogs_sbi_sm_debug(e);
nf_instance = e->sbi.data;
ogs_assert(nf_instance);
switch (e->id) {
case OGS_FSM_ENTRY_SIG:
if (NF_INSTANCE_TYPE_IS_NRF(nf_instance)) {
ogs_sbi_subscription_spec_t *subscription_spec = NULL;
ogs_info("[%s] NF registered [Heartbeat:%ds]",
NF_INSTANCE_ID(ogs_sbi_self()->nf_instance),
nf_instance->time.heartbeat_interval);
if (nf_instance->time.heartbeat_interval) {
ogs_timer_start(nf_instance->t_heartbeat_interval,
ogs_time_from_sec(nf_instance->time.heartbeat_interval));
ogs_timer_start(nf_instance->t_no_heartbeat,
ogs_time_from_sec(
nf_instance->time.heartbeat_interval +
ogs_app()->time.nf_instance.no_heartbeat_margin));
}
ogs_list_for_each(
&ogs_sbi_self()->subscription_spec_list, subscription_spec) {
ogs_nnrf_nfm_send_nf_status_subscribe(
ogs_sbi_self()->nf_instance->nf_type,
ogs_sbi_self()->nf_instance->id,
subscription_spec->subscr_cond.nf_type,
subscription_spec->subscr_cond.service_name);
}
}
break;
case OGS_FSM_EXIT_SIG:
if (NF_INSTANCE_TYPE_IS_NRF(nf_instance)) {
ogs_info("[%s] NF de-registered",
NF_INSTANCE_ID(ogs_sbi_self()->nf_instance));
if (nf_instance->time.heartbeat_interval) {
ogs_timer_stop(nf_instance->t_heartbeat_interval);
ogs_timer_stop(nf_instance->t_no_heartbeat);
}
if (!OGS_FSM_CHECK(&nf_instance->sm, ogs_sbi_nf_state_exception)) {
ogs_assert(true ==
ogs_nnrf_nfm_send_nf_de_register(nf_instance));
}
}
break;
case OGS_EVENT_SBI_CLIENT:
message = e->sbi.message;
ogs_assert(message);
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)
if (message->res_status == OGS_SBI_HTTP_STATUS_NO_CONTENT ||
message->res_status == OGS_SBI_HTTP_STATUS_OK) {
if (nf_instance->time.heartbeat_interval)
ogs_timer_start(nf_instance->t_no_heartbeat,
ogs_time_from_sec(
nf_instance->time.heartbeat_interval +
ogs_app()->time.nf_instance.
no_heartbeat_margin));
} else {
ogs_warn("[%s] HTTP response error [%d]",
NF_INSTANCE_ID(ogs_sbi_self()->nf_instance),
message->res_status);
OGS_FSM_TRAN(s, &ogs_sbi_nf_state_exception);
}
break;
DEFAULT
ogs_error("[%s] Invalid resource name [%s]",
NF_INSTANCE_ID(ogs_sbi_self()->nf_instance),
message->h.resource.component[0]);
END
break;
DEFAULT
ogs_error("[%s] Invalid API name [%s]",
NF_INSTANCE_ID(ogs_sbi_self()->nf_instance),
message->h.service.name);
END
break;
case OGS_EVENT_SBI_TIMER:
switch(e->timer_id) {
case OGS_TIMER_NF_INSTANCE_HEARTBEAT_INTERVAL:
if (nf_instance->time.heartbeat_interval)
ogs_timer_start(nf_instance->t_heartbeat_interval,
ogs_time_from_sec(nf_instance->time.heartbeat_interval));
ogs_assert(true == ogs_nnrf_nfm_send_nf_update(nf_instance));
break;
case OGS_TIMER_NF_INSTANCE_NO_HEARTBEAT:
ogs_error("[%s:%s] No heartbeat",
NF_INSTANCE_ID(ogs_sbi_self()->nf_instance),
OpenAPI_nf_type_ToString(
NF_INSTANCE_TYPE(ogs_sbi_self()->nf_instance)));
OGS_FSM_TRAN(s, &ogs_sbi_nf_state_will_register);
break;
case OGS_TIMER_NF_INSTANCE_VALIDITY:
ogs_assert(!NF_INSTANCE_TYPE_IS_NRF(nf_instance));
ogs_assert(nf_instance->id);
ogs_info("[%s] NF expired", nf_instance->id);
OGS_FSM_TRAN(s, &ogs_sbi_nf_state_de_registered);
break;
default:
ogs_error("[%s:%s] Unknown timer[%s:%d]",
OpenAPI_nf_type_ToString(nf_instance->nf_type),
nf_instance->id ? nf_instance->id : "Undefined",
ogs_timer_get_name(e->timer_id), e->timer_id);
}
break;
default:
ogs_error("[%s:%s] Unknown event %s",
OpenAPI_nf_type_ToString(nf_instance->nf_type),
nf_instance->id ? nf_instance->id : "Undefined",
ogs_event_get_name(e));
break;
}
}
void ogs_sbi_nf_state_de_registered(ogs_fsm_t *s, ogs_event_t *e)
{
ogs_sbi_nf_instance_t *nf_instance = NULL;
ogs_assert(s);
ogs_assert(e);
ogs_sbi_sm_debug(e);
nf_instance = e->sbi.data;
ogs_assert(nf_instance);
ogs_assert(ogs_sbi_self()->nf_instance);
switch (e->id) {
case OGS_FSM_ENTRY_SIG:
if (NF_INSTANCE_TYPE_IS_NRF(nf_instance)) {
ogs_info("[%s] NF de-registered",
NF_INSTANCE_ID(ogs_sbi_self()->nf_instance));
}
break;
case OGS_FSM_EXIT_SIG:
break;
default:
ogs_error("[%s:%s] Unknown event %s",
OpenAPI_nf_type_ToString(nf_instance->nf_type),
nf_instance->id ? nf_instance->id : "Undefined",
ogs_event_get_name(e));
break;
}
}
void ogs_sbi_nf_state_exception(ogs_fsm_t *s, ogs_event_t *e)
{
ogs_sbi_nf_instance_t *nf_instance = NULL;
ogs_sbi_message_t *message = NULL;
ogs_assert(s);
ogs_assert(e);
ogs_sbi_sm_debug(e);
nf_instance = e->sbi.data;
ogs_assert(nf_instance);
ogs_assert(ogs_sbi_self()->nf_instance);
switch (e->id) {
case OGS_FSM_ENTRY_SIG:
if (NF_INSTANCE_TYPE_IS_NRF(nf_instance)) {
ogs_timer_start(nf_instance->t_registration_interval,
ogs_app()->time.message.sbi.
nf_register_interval_in_exception);
}
break;
case OGS_FSM_EXIT_SIG:
if (NF_INSTANCE_TYPE_IS_NRF(nf_instance)) {
ogs_timer_stop(nf_instance->t_registration_interval);
}
break;
case OGS_EVENT_SBI_TIMER:
switch(e->timer_id) {
case OGS_TIMER_NF_INSTANCE_REGISTRATION_INTERVAL:
ogs_warn("[%s] Retry to registration with NRF",
NF_INSTANCE_ID(ogs_sbi_self()->nf_instance));
OGS_FSM_TRAN(s, &ogs_sbi_nf_state_will_register);
break;
default:
ogs_error("[%s:%s] Unknown timer[%s:%d]",
OpenAPI_nf_type_ToString(nf_instance->nf_type),
nf_instance->id ? nf_instance->id : "Undefined",
ogs_timer_get_name(e->timer_id), e->timer_id);
}
break;
case OGS_EVENT_SBI_CLIENT:
message = e->sbi.message;
ogs_assert(message);
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)
break;
DEFAULT
ogs_error("Invalid resource name [%s]",
message->h.resource.component[0]);
END
break;
DEFAULT
ogs_error("Invalid API name [%s]", message->h.service.name);
END
break;
default:
ogs_error("[%s:%s] Unknown event %s",
OpenAPI_nf_type_ToString(nf_instance->nf_type),
nf_instance->id ? nf_instance->id : "Undefined",
ogs_event_get_name(e));
break;
}
}
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