forked from acouzens/open5gs
267 lines
7.4 KiB
C
267 lines
7.4 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 sgwu_context_t self;
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int __sgwu_log_domain;
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static OGS_POOL(sgwu_sess_pool, sgwu_sess_t);
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static OGS_POOL(sgwu_sxa_seid_pool, ogs_pool_id_t);
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static int context_initialized = 0;
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void sgwu_context_init(void)
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{
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ogs_assert(context_initialized == 0);
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/* Initialize SGWU context */
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memset(&self, 0, sizeof(sgwu_context_t));
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ogs_log_install_domain(&__sgwu_log_domain, "sgwu", ogs_core()->log.level);
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/* Setup UP Function Features */
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ogs_pfcp_self()->up_function_features.ftup = 1;
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ogs_pfcp_self()->up_function_features.empu = 1;
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ogs_pfcp_self()->up_function_features_len = 2;
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ogs_list_init(&self.sess_list);
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ogs_pool_init(&sgwu_sess_pool, ogs_app()->pool.sess);
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ogs_pool_init(&sgwu_sxa_seid_pool, ogs_app()->pool.sess);
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ogs_pool_random_id_generate(&sgwu_sxa_seid_pool);
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self.sgwu_sxa_seid_hash = ogs_hash_make();
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ogs_assert(self.sgwu_sxa_seid_hash);
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self.sgwc_sxa_seid_hash = ogs_hash_make();
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ogs_assert(self.sgwc_sxa_seid_hash);
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self.sgwc_sxa_f_seid_hash = ogs_hash_make();
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ogs_assert(self.sgwc_sxa_f_seid_hash);
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context_initialized = 1;
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}
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void sgwu_context_final(void)
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{
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ogs_assert(context_initialized == 1);
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sgwu_sess_remove_all();
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ogs_assert(self.sgwu_sxa_seid_hash);
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ogs_hash_destroy(self.sgwu_sxa_seid_hash);
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ogs_assert(self.sgwc_sxa_seid_hash);
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ogs_hash_destroy(self.sgwc_sxa_seid_hash);
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ogs_assert(self.sgwc_sxa_f_seid_hash);
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ogs_hash_destroy(self.sgwc_sxa_f_seid_hash);
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ogs_pool_final(&sgwu_sess_pool);
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ogs_pool_final(&sgwu_sxa_seid_pool);
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context_initialized = 0;
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}
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sgwu_context_t *sgwu_self(void)
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{
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return &self;
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}
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static int sgwu_context_prepare(void)
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{
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return OGS_OK;
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}
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static int sgwu_context_validation(void)
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{
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if (ogs_list_first(&ogs_gtp_self()->gtpu_list) == NULL) {
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ogs_error("No sgwu.gtpu in '%s'", ogs_app()->file);
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return OGS_ERROR;
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}
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return OGS_OK;
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}
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int sgwu_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 = sgwu_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, "sgwu")) {
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ogs_yaml_iter_t sgwu_iter;
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ogs_yaml_iter_recurse(&root_iter, &sgwu_iter);
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while (ogs_yaml_iter_next(&sgwu_iter)) {
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const char *sgwu_key = ogs_yaml_iter_key(&sgwu_iter);
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ogs_assert(sgwu_key);
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if (!strcmp(sgwu_key, "gtpu")) {
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/* handle config in gtp library */
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} else if (!strcmp(sgwu_key, "pfcp")) {
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/* handle config in pfcp library */
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} else
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ogs_warn("unknown key `%s`", sgwu_key);
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}
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}
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}
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rv = sgwu_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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sgwu_sess_t *sgwu_sess_add(ogs_pfcp_f_seid_t *cp_f_seid)
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{
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sgwu_sess_t *sess = NULL;
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ogs_assert(cp_f_seid);
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ogs_pool_alloc(&sgwu_sess_pool, &sess);
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ogs_assert(sess);
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memset(sess, 0, sizeof *sess);
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ogs_pfcp_pool_init(&sess->pfcp);
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/* Set SEID */
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ogs_pool_alloc(&sgwu_sxa_seid_pool, &sess->sgwu_sxa_seid_node);
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ogs_assert(sess->sgwu_sxa_seid_node);
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sess->sgwu_sxa_seid = *(sess->sgwu_sxa_seid_node);
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ogs_hash_set(self.sgwu_sxa_seid_hash, &sess->sgwu_sxa_seid,
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sizeof(sess->sgwu_sxa_seid), sess);
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/* Since F-SEID is composed of ogs_ip_t and uint64-seid,
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* all these values must be put into the structure-sgwc_sxa_f_eid
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* before creating hash */
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sess->sgwc_sxa_f_seid.seid = cp_f_seid->seid;
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ogs_assert(OGS_OK ==
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ogs_pfcp_f_seid_to_ip(cp_f_seid, &sess->sgwc_sxa_f_seid.ip));
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ogs_hash_set(self.sgwc_sxa_f_seid_hash, &sess->sgwc_sxa_f_seid,
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sizeof(sess->sgwc_sxa_f_seid), sess);
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ogs_hash_set(self.sgwc_sxa_seid_hash, &sess->sgwc_sxa_f_seid.seid,
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sizeof(sess->sgwc_sxa_f_seid.seid), sess);
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ogs_info("UE F-SEID[UP:0x%lx CP:0x%lx]",
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(long)sess->sgwu_sxa_seid, (long)sess->sgwc_sxa_f_seid.seid);
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ogs_list_add(&self.sess_list, sess);
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ogs_info("[Added] Number of SGWU-Sessions is now %d",
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ogs_list_count(&self.sess_list));
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return sess;
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}
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int sgwu_sess_remove(sgwu_sess_t *sess)
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{
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ogs_assert(sess);
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ogs_list_remove(&self.sess_list, sess);
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ogs_pfcp_sess_clear(&sess->pfcp);
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ogs_hash_set(self.sgwu_sxa_seid_hash, &sess->sgwu_sxa_seid,
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sizeof(sess->sgwu_sxa_seid), NULL);
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ogs_hash_set(self.sgwc_sxa_seid_hash, &sess->sgwc_sxa_f_seid.seid,
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sizeof(sess->sgwc_sxa_f_seid.seid), NULL);
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ogs_hash_set(self.sgwc_sxa_f_seid_hash, &sess->sgwc_sxa_f_seid,
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sizeof(sess->sgwc_sxa_f_seid), NULL);
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ogs_pfcp_pool_final(&sess->pfcp);
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ogs_pool_free(&sgwu_sxa_seid_pool, sess->sgwu_sxa_seid_node);
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ogs_pool_free(&sgwu_sess_pool, sess);
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ogs_info("[Removed] Number of SGWU-sessions is now %d",
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ogs_list_count(&self.sess_list));
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return OGS_OK;
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}
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void sgwu_sess_remove_all(void)
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{
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sgwu_sess_t *sess = NULL, *next = NULL;
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ogs_list_for_each_safe(&self.sess_list, next, sess) {
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sgwu_sess_remove(sess);
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}
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}
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sgwu_sess_t *sgwu_sess_find_by_sgwc_sxa_seid(uint64_t seid)
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{
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return ogs_hash_get(self.sgwc_sxa_seid_hash, &seid, sizeof(seid));
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}
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sgwu_sess_t *sgwu_sess_find_by_sgwc_sxa_f_seid(ogs_pfcp_f_seid_t *f_seid)
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{
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struct {
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uint64_t seid;
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ogs_ip_t ip;
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} key;
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ogs_assert(f_seid);
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ogs_assert(OGS_OK == ogs_pfcp_f_seid_to_ip(f_seid, &key.ip));
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key.seid = f_seid->seid;
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return ogs_hash_get(self.sgwc_sxa_f_seid_hash, &key, sizeof(key));
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}
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sgwu_sess_t *sgwu_sess_find_by_sgwu_sxa_seid(uint64_t seid)
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{
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return ogs_hash_get(self.sgwu_sxa_seid_hash, &seid, sizeof(seid));
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}
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sgwu_sess_t *sgwu_sess_add_by_message(ogs_pfcp_message_t *message)
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{
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sgwu_sess_t *sess = NULL;
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ogs_pfcp_f_seid_t *f_seid = NULL;
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ogs_pfcp_session_establishment_request_t *req =
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&message->pfcp_session_establishment_request;;
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f_seid = req->cp_f_seid.data;
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if (req->cp_f_seid.presence == 0 || f_seid == NULL) {
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ogs_error("No CP F-SEID");
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return NULL;
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}
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f_seid->seid = be64toh(f_seid->seid);
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sess = sgwu_sess_find_by_sgwc_sxa_f_seid(f_seid);
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if (!sess) {
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sess = sgwu_sess_add(f_seid);
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if (!sess) {
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ogs_error("No Session Context");
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return NULL;
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}
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}
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ogs_assert(sess);
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return sess;
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}
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