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open5gs/src/scp/context.c

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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"
static scp_context_t self;
int __scp_log_domain;
static OGS_POOL(scp_assoc_pool, scp_assoc_t);
static int context_initialized = 0;
static int max_num_of_scp_assoc = 0;
void scp_context_init(void)
{
ogs_assert(context_initialized == 0);
/* Initialize SCP context */
memset(&self, 0, sizeof(scp_context_t));
ogs_log_install_domain(&__scp_log_domain, "scp", ogs_core()->log.level);
#define MAX_NUM_OF_SCP_ASSOC 8
max_num_of_scp_assoc = ogs_global_conf()->max.ue * MAX_NUM_OF_SCP_ASSOC;
ogs_pool_init(&scp_assoc_pool, max_num_of_scp_assoc);
context_initialized = 1;
}
void scp_context_final(void)
{
ogs_assert(context_initialized == 1);
scp_assoc_remove_all();
ogs_pool_final(&scp_assoc_pool);
context_initialized = 0;
}
scp_context_t *scp_self(void)
{
return &self;
}
static int scp_context_prepare(void)
{
ogs_sbi_server_t *server = NULL;
ogs_sbi_nf_instance_t *nf_instance = NULL;
ogs_sbi_nf_info_t *nf_info = NULL;
ogs_sbi_scp_info_t *scp_info = NULL;
/*********************************************************************
* SCP Port Configuration
*********************************************************************/
nf_instance = ogs_sbi_self()->nf_instance;
ogs_assert(nf_instance);
nf_info = ogs_sbi_nf_info_add(
&nf_instance->nf_info_list, OpenAPI_nf_type_SCP);
if (!nf_info) {
ogs_error("ogs_sbi_nf_info_add() failed");
return OGS_ERROR;
}
scp_info = &nf_info->scp;
for (server = ogs_sbi_server_first();
server; server = ogs_sbi_server_next(server)) {
ogs_sockaddr_t *advertise = NULL;
advertise = server->advertise;
if (!advertise)
advertise = server->node.addr;
ogs_assert(advertise);
if (server->scheme == OpenAPI_uri_scheme_https) {
scp_info->https.presence = true;
scp_info->https.port = OGS_PORT(advertise);
} else if (server->scheme == OpenAPI_uri_scheme_http) {
scp_info->http.presence = true;
scp_info->http.port = OGS_PORT(advertise);
} else {
ogs_error("Unknown scheme[%d]", server->scheme);
ogs_assert_if_reached();
}
}
return OGS_OK;
}
static int scp_context_validation(void)
{
return OGS_OK;
}
int scp_context_parse_config(void)
{
int rv;
yaml_document_t *document = NULL;
ogs_yaml_iter_t root_iter;
document = ogs_app()->document;
ogs_assert(document);
rv = scp_context_prepare();
if (rv != OGS_OK) return rv;
ogs_yaml_iter_init(&root_iter, document);
while (ogs_yaml_iter_next(&root_iter)) {
const char *root_key = ogs_yaml_iter_key(&root_iter);
ogs_assert(root_key);
if (!strcmp(root_key, "scp")) {
ogs_yaml_iter_t scp_iter;
ogs_yaml_iter_recurse(&root_iter, &scp_iter);
while (ogs_yaml_iter_next(&scp_iter)) {
const char *scp_key = ogs_yaml_iter_key(&scp_iter);
ogs_assert(scp_key);
if (!strcmp(scp_key, "default")) {
/* handle config in sbi library */
} else if (!strcmp(scp_key, "sbi")) {
/* handle config in sbi library */
} else if (!strcmp(scp_key, "nrf")) {
/* handle config in sbi library */
} else if (!strcmp(scp_key, "scp")) {
/* handle config in sbi library */
} else if (!strcmp(scp_key, "service_name")) {
/* handle config in sbi library */
} else if (!strcmp(scp_key, "discovery")) {
/* handle config in sbi library */
} else if (!strcmp(scp_key, "info")) {
ogs_sbi_nf_instance_t *nf_instance = NULL;
ogs_sbi_nf_info_t *nf_info = NULL;
ogs_sbi_scp_info_t *scp_info = NULL;
ogs_yaml_iter_t info_iter;
ogs_yaml_iter_recurse(&scp_iter, &info_iter);
nf_instance = ogs_sbi_self()->nf_instance;
ogs_assert(nf_instance);
nf_info = ogs_sbi_nf_info_find(
&nf_instance->nf_info_list,
OpenAPI_nf_type_SCP);
ogs_assert(nf_info);
scp_info = &nf_info->scp;
while (ogs_yaml_iter_next(&info_iter)) {
const char *info_key =
ogs_yaml_iter_key(&info_iter);
ogs_assert(info_key);
if (!strcmp(info_key, "domain")) {
ogs_yaml_iter_t domain_array, domain_iter;
ogs_yaml_iter_recurse(&info_iter, &domain_array);
do {
if (ogs_yaml_iter_type(&domain_array) ==
YAML_MAPPING_NODE) {
memcpy(&domain_iter, &domain_array,
sizeof(ogs_yaml_iter_t));
} else if (ogs_yaml_iter_type(&domain_array) ==
YAML_SEQUENCE_NODE) {
if (!ogs_yaml_iter_next(&domain_array))
break;
ogs_yaml_iter_recurse(&domain_array,
&domain_iter);
} else if (ogs_yaml_iter_type(&domain_array) ==
YAML_SCALAR_NODE) {
break;
} else
ogs_assert_if_reached();
while (ogs_yaml_iter_next(&domain_iter)) {
const char *domain_key =
ogs_yaml_iter_key(&domain_iter);
ogs_assert(domain_key);
if (!strcmp(domain_key, "port")) {
ogs_yaml_iter_t port_iter;
ogs_yaml_iter_recurse(&domain_iter,
&port_iter);
while (ogs_yaml_iter_next(&port_iter)) {
const char *port_key =
ogs_yaml_iter_key(&port_iter);
ogs_assert(port_key);
if (!strcmp(port_key, "http")) {
const char *v =
ogs_yaml_iter_value(
&port_iter);
if (v) {
scp_info->domain[
scp_info->
num_of_domain].
http.presence =
true;
scp_info->domain[
scp_info->
num_of_domain].
http.port = atoi(v);
}
} else if (!strcmp(port_key,
"https")) {
const char *v =
ogs_yaml_iter_value(
&port_iter);
if (v) {
scp_info->domain[
scp_info->
num_of_domain].
https.presence =
true;
scp_info->domain[
scp_info->
num_of_domain].
https.port =
atoi(v);
}
} else
ogs_warn("unknown key `%s`",
port_key);
}
} else if (!strcmp(domain_key, "name")) {
const char *v = ogs_yaml_iter_value(
&domain_iter);
if (v)
scp_info->domain[
scp_info->num_of_domain].
name = ogs_strdup(v);
} else if (!strcmp(domain_key, "fqdn")) {
const char *v = ogs_yaml_iter_value(
&domain_iter);
if (v)
scp_info->domain[
scp_info->num_of_domain].
fqdn = ogs_strdup(v);
} else
ogs_warn("unknown key `%s`",
domain_key);
}
if (scp_info->domain[
scp_info->num_of_domain].name)
scp_info->num_of_domain++;
} while (ogs_yaml_iter_type(&domain_array) ==
YAML_SEQUENCE_NODE);
} else if (!strcmp(info_key, "port")) {
ogs_yaml_iter_t port_iter;
ogs_yaml_iter_recurse(&info_iter, &port_iter);
while (ogs_yaml_iter_next(&port_iter)) {
const char *port_key =
ogs_yaml_iter_key(&port_iter);
ogs_assert(port_key);
if (!strcmp(port_key, "http")) {
const char *v =
ogs_yaml_iter_value(&port_iter);
if (v) {
scp_info->http.presence = true;
scp_info->http.port = atoi(v);
}
} else if (!strcmp(port_key, "https")) {
const char *v =
ogs_yaml_iter_value(&port_iter);
if (v) {
scp_info->https.presence = true;
scp_info->https.port = atoi(v);
}
} else
ogs_warn("unknown key `%s`", port_key);
}
} else
ogs_warn("unknown key `%s`", info_key);
}
} else
ogs_warn("unknown key `%s`", scp_key);
}
}
}
rv = scp_context_validation();
if (rv != OGS_OK) return rv;
return OGS_OK;
}
scp_assoc_t *scp_assoc_add(ogs_sbi_stream_t *stream)
{
scp_assoc_t *assoc = NULL;
ogs_assert(stream);
ogs_pool_alloc(&scp_assoc_pool, &assoc);
if (!assoc) {
ogs_error("Maximum number of association[%d] reached",
max_num_of_scp_assoc);
return NULL;
}
memset(assoc, 0, sizeof *assoc);
assoc->stream = stream;
assoc->discovery_option = ogs_sbi_discovery_option_new();
ogs_assert(assoc->discovery_option);
ogs_list_add(&self.assoc_list, assoc);
return assoc;
}
void scp_assoc_remove(scp_assoc_t *assoc)
{
ogs_assert(assoc);
ogs_list_remove(&self.assoc_list, assoc);
ogs_assert(assoc->discovery_option);
ogs_sbi_discovery_option_free(assoc->discovery_option);
if (assoc->client)
ogs_sbi_client_remove(assoc->client);
if (assoc->nrf_client)
ogs_sbi_client_remove(assoc->nrf_client);
if (assoc->target_apiroot)
ogs_free(assoc->target_apiroot);
ogs_pool_free(&scp_assoc_pool, assoc);
}
void scp_assoc_remove_all(void)
{
scp_assoc_t *assoc = NULL, *next_assoc = NULL;
ogs_list_for_each_safe(&self.assoc_list, next_assoc, assoc)
scp_assoc_remove(assoc);
}
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