310 lines
8.4 KiB
C
310 lines
8.4 KiB
C
/*
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* Copyright (C) 2019-2023 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 "context.h"
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static af_context_t self;
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int __af_log_domain;
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static OGS_POOL(af_sess_pool, af_sess_t);
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static int context_initialized = 0;
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static void clear_pcf_app_session_id(af_sess_t *sess);
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void af_context_init(void)
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{
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ogs_assert(context_initialized == 0);
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/* Initialize AF context */
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memset(&self, 0, sizeof(af_context_t));
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ogs_log_install_domain(&__af_log_domain, "af", ogs_core()->log.level);
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ogs_pool_init(&af_sess_pool, ogs_app()->pool.sess);
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self.supi_hash = ogs_hash_make();
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ogs_assert(self.supi_hash);
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self.ipv4_hash = ogs_hash_make();
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ogs_assert(self.ipv4_hash);
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self.ipv6_hash = ogs_hash_make();
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ogs_assert(self.ipv6_hash);
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self.pcf_app_session_id_hash = ogs_hash_make();
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ogs_assert(self.pcf_app_session_id_hash);
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context_initialized = 1;
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}
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void af_context_final(void)
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{
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ogs_assert(context_initialized == 1);
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af_sess_remove_all();
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ogs_assert(self.supi_hash);
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ogs_hash_destroy(self.supi_hash);
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ogs_assert(self.ipv4_hash);
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ogs_hash_destroy(self.ipv4_hash);
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ogs_assert(self.ipv6_hash);
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ogs_hash_destroy(self.ipv6_hash);
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ogs_assert(self.pcf_app_session_id_hash);
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ogs_hash_destroy(self.pcf_app_session_id_hash);
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ogs_pool_final(&af_sess_pool);
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context_initialized = 0;
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}
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af_context_t *af_self(void)
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{
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return &self;
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}
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static int af_context_prepare(void)
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{
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return OGS_OK;
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}
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static int af_context_validation(void)
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{
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return OGS_OK;
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}
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int af_context_parse_config(void)
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{
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int rv;
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yaml_document_t *document = NULL;
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ogs_yaml_iter_t root_iter;
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document = ogs_app()->document;
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ogs_assert(document);
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rv = af_context_prepare();
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if (rv != OGS_OK) return rv;
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ogs_yaml_iter_init(&root_iter, document);
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while (ogs_yaml_iter_next(&root_iter)) {
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const char *root_key = ogs_yaml_iter_key(&root_iter);
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ogs_assert(root_key);
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if (!strcmp(root_key, "af")) {
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ogs_yaml_iter_t af_iter;
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ogs_yaml_iter_recurse(&root_iter, &af_iter);
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while (ogs_yaml_iter_next(&af_iter)) {
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const char *af_key = ogs_yaml_iter_key(&af_iter);
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ogs_assert(af_key);
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if (!strcmp(af_key, "default")) {
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/* handle config in sbi library */
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} else if (!strcmp(af_key, "sbi")) {
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/* handle config in sbi library */
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} else if (!strcmp(af_key, "nrf")) {
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/* handle config in sbi library */
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} else if (!strcmp(af_key, "scp")) {
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/* handle config in sbi library */
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} else if (!strcmp(af_key, "service_name")) {
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/* handle config in sbi library */
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} else if (!strcmp(af_key, "discovery")) {
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/* handle config in sbi library */
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} else
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ogs_warn("unknown key `%s`", af_key);
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}
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}
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}
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rv = af_context_validation();
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if (rv != OGS_OK) return rv;
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return OGS_OK;
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}
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af_sess_t *af_sess_add_by_ue_address(ogs_ip_t *ue_address)
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{
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af_sess_t *sess = NULL;
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ogs_assert(ue_address);
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ogs_assert(ue_address->ipv4 || ue_address->ipv6);
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ogs_pool_alloc(&af_sess_pool, &sess);
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ogs_assert(sess);
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memset(sess, 0, sizeof *sess);
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sess->af_app_session_id = ogs_msprintf("%d",
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(int)ogs_pool_index(&af_sess_pool, sess));
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ogs_assert(sess->af_app_session_id);
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if (ue_address->ipv4) {
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sess->ipv4addr = ogs_ipv4_to_string(ue_address->addr);
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ogs_assert(sess->ipv4addr);
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}
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if (ue_address->ipv6) {
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sess->ipv6addr = ogs_ipv6addr_to_string(ue_address->addr6);
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ogs_assert(sess->ipv6addr);
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sess->ipv6prefix = ogs_ipv6prefix_to_string(
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ue_address->addr6, OGS_IPV6_128_PREFIX_LEN);
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ogs_assert(sess->ipv6prefix);
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}
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OGS_SBI_FEATURES_SET(sess->policyauthorization_features,
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OGS_SBI_NPCF_POLICYAUTHORIZATION_SPONSORED_CONNECTIVITY);
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OGS_SBI_FEATURES_SET(sess->policyauthorization_features,
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OGS_SBI_NPCF_POLICYAUTHORIZATION_IMS_SBI);
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ogs_list_add(&self.sess_list, sess);
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return sess;
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}
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void af_sess_remove(af_sess_t *sess)
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{
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int i;
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ogs_assert(sess);
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ogs_list_remove(&self.sess_list, sess);
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/* Free SBI object memory */
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ogs_sbi_object_free(&sess->sbi);
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if (sess->af_app_session_id)
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ogs_free(sess->af_app_session_id);
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clear_pcf_app_session_id(sess);
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if (sess->ipv4addr)
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ogs_free(sess->ipv4addr);
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if (sess->ipv6addr)
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ogs_free(sess->ipv6addr);
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if (sess->ipv6prefix)
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ogs_free(sess->ipv6prefix);
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if (sess->supi)
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ogs_free(sess->supi);
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if (sess->gpsi)
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ogs_free(sess->gpsi);
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if (sess->dnn)
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ogs_free(sess->dnn);
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if (sess->pcf.fqdn)
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ogs_free(sess->pcf.fqdn);
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for (i = 0; i < sess->pcf.num_of_ip; i++) {
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if (sess->pcf.ip[i].addr)
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ogs_freeaddrinfo(sess->pcf.ip[i].addr);
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if (sess->pcf.ip[i].addr6)
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ogs_freeaddrinfo(sess->pcf.ip[i].addr6);
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}
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sess->pcf.num_of_ip = 0;
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if (sess->pcf.client)
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ogs_sbi_client_remove(sess->pcf.client);
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ogs_pool_free(&af_sess_pool, sess);
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}
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void af_sess_remove_all(void)
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{
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af_sess_t *sess = NULL, *next_sess = NULL;
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ogs_list_for_each_safe(&self.sess_list, next_sess, sess)
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af_sess_remove(sess);
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}
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static void clear_pcf_app_session_id(af_sess_t *sess)
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{
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ogs_assert(sess);
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if (sess->pcf_app_session_id) {
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ogs_hash_set(self.pcf_app_session_id_hash,
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&sess->pcf_app_session_id, sizeof(sess->pcf_app_session_id), NULL);
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ogs_free(sess->pcf_app_session_id);
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}
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}
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bool af_sess_set_pcf_app_session_id(af_sess_t *sess, char *pcf_app_session_id)
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{
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ogs_assert(sess);
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ogs_assert(pcf_app_session_id);
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clear_pcf_app_session_id(sess);
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sess->pcf_app_session_id = ogs_strdup(pcf_app_session_id);
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ogs_assert(sess->pcf_app_session_id);
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ogs_hash_set(self.pcf_app_session_id_hash,
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&sess->pcf_app_session_id, strlen(sess->pcf_app_session_id), sess);
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return true;
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}
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af_sess_t *af_sess_find(uint32_t index)
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{
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return ogs_pool_find(&af_sess_pool, index);
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}
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af_sess_t *af_sess_find_by_af_app_session_id(char *af_app_session_id)
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{
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ogs_assert(af_app_session_id);
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return af_sess_find(atoll(af_app_session_id));
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}
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af_sess_t *af_sess_find_by_pcf_app_session_id(char *pcf_app_session_id)
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{
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ogs_assert(pcf_app_session_id);
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return (af_sess_t *)ogs_hash_get(self.pcf_app_session_id_hash,
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pcf_app_session_id, strlen(pcf_app_session_id));
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}
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void af_sess_associate_pcf_client(af_sess_t *sess)
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{
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ogs_sbi_client_t *client = NULL;
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ogs_sockaddr_t *addr = NULL, *addr6 = NULL;
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OpenAPI_uri_scheme_e scheme = OpenAPI_uri_scheme_NULL;
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ogs_assert(sess);
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scheme = ogs_sbi_self()->tls.client.scheme;
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ogs_assert(scheme);
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if (!client) {
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/* At this point, CLIENT selection method is very simple. */
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if (sess->pcf.num_of_ip) {
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addr = sess->pcf.ip[0].addr;
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addr6 = sess->pcf.ip[0].addr6;
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}
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if (sess->pcf.fqdn || addr || addr6) {
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client = ogs_sbi_client_find(
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scheme, sess->pcf.fqdn, 0, addr, addr6);
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if (!client) {
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ogs_debug("%s: ogs_sbi_client_add()", OGS_FUNC);
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client = ogs_sbi_client_add(
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scheme, sess->pcf.fqdn, 0, addr, addr6);
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if (!client) {
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ogs_error("%s: ogs_sbi_client_add() failed", OGS_FUNC);
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return;
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}
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}
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}
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}
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if (client)
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OGS_SBI_SETUP_CLIENT(&sess->pcf, client);
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}
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