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/*
* Copyright (C) 2019-2023 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 "gtp-path.h"
#include "pfcp-path.h"
#include "metrics.h"
static ogs_thread_t *thread;
static void upf_main(void *data);
static int initialized = 0;
int upf_initialize(void)
{
int rv;
#define APP_NAME "upf"
rv = ogs_app_parse_local_conf(APP_NAME);
if (rv != OGS_OK) return rv;
upf_metrics_init();
ogs_gtp_context_init(OGS_MAX_NUM_OF_GTPU_RESOURCE);
ogs_pfcp_context_init();
upf_context_init();
upf_event_init();
upf_gtp_init();
rv = ogs_pfcp_xact_init();
if (rv != OGS_OK) return rv;
rv = ogs_log_config_domain(
ogs_app()->logger.domain, ogs_app()->logger.level);
if (rv != OGS_OK) return rv;
rv = ogs_gtp_context_parse_config(APP_NAME, "smf");
if (rv != OGS_OK) return rv;
rv = ogs_pfcp_context_parse_config(APP_NAME, "smf");
if (rv != OGS_OK) return rv;
rv = ogs_metrics_context_parse_config(APP_NAME);
if (rv != OGS_OK) return rv;
rv = upf_context_parse_config();
if (rv != OGS_OK) return rv;
rv = ogs_pfcp_ue_pool_generate();
if (rv != OGS_OK) return rv;
ogs_metrics_context_open(ogs_metrics_self());
rv = upf_pfcp_open();
if (rv != OGS_OK) return rv;
rv = upf_gtp_open();
if (rv != OGS_OK) return rv;
thread = ogs_thread_create(upf_main, NULL);
if (!thread) return OGS_ERROR;
initialized = 1;
return OGS_OK;
}
void upf_terminate(void)
{
if (!initialized) return;
upf_event_term();
ogs_thread_destroy(thread);
upf_pfcp_close();
upf_gtp_close();
ogs_metrics_context_close(ogs_metrics_self());
upf_context_final();
ogs_pfcp_context_final();
ogs_gtp_context_final();
ogs_pfcp_xact_final();
upf_gtp_final();
upf_event_final();
upf_metrics_final();
}
static void upf_main(void *data)
{
ogs_fsm_t upf_sm;
int rv;
ogs_fsm_init(&upf_sm, upf_state_initial, upf_state_final, 0);
for ( ;; ) {
ogs_pollset_poll(ogs_app()->pollset,
ogs_timer_mgr_next(ogs_app()->timer_mgr));
/*
* After ogs_pollset_poll(), ogs_timer_mgr_expire() must be called.
*
* The reason is why ogs_timer_mgr_next() can get the corrent value
* when ogs_timer_stop() is called internally in ogs_timer_mgr_expire().
*
* You should not use event-queue before ogs_timer_mgr_expire().
* In this case, ogs_timer_mgr_expire() does not work
* because 'if rv == OGS_DONE' statement is exiting and
* not calling ogs_timer_mgr_expire().
*/
ogs_timer_mgr_expire(ogs_app()->timer_mgr);
for ( ;; ) {
upf_event_t *e = NULL;
rv = ogs_queue_trypop(ogs_app()->queue, (void**)&e);
ogs_assert(rv != OGS_ERROR);
if (rv == OGS_DONE)
goto done;
if (rv == OGS_RETRY)
break;
ogs_assert(e);
ogs_fsm_dispatch(&upf_sm, e);
upf_event_free(e);
}
}
done:
ogs_fsm_fini(&upf_sm, 0);
}
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