forked from acouzens/open5gs
328 lines
8.0 KiB
C
328 lines
8.0 KiB
C
/*
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* Copyright (C) 2019-2022 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 bsf_context_t self;
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int __bsf_log_domain;
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static OGS_POOL(bsf_sess_pool, bsf_sess_t);
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static int context_initialized = 0;
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static void clear_ipv4addr(bsf_sess_t *sess);
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static void clear_ipv6prefix(bsf_sess_t *sess);
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void bsf_context_init(void)
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{
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ogs_assert(context_initialized == 0);
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/* Initialize BSF context */
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memset(&self, 0, sizeof(bsf_context_t));
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ogs_log_install_domain(&__bsf_log_domain, "bsf", ogs_core()->log.level);
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ogs_pool_init(&bsf_sess_pool, ogs_app()->pool.sess);
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self.ipv4addr_hash = ogs_hash_make();
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ogs_assert(self.ipv4addr_hash);
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self.ipv6prefix_hash = ogs_hash_make();
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ogs_assert(self.ipv6prefix_hash);
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context_initialized = 1;
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}
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void bsf_context_final(void)
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{
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ogs_assert(context_initialized == 1);
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bsf_sess_remove_all();
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ogs_assert(self.ipv4addr_hash);
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ogs_hash_destroy(self.ipv4addr_hash);
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ogs_assert(self.ipv6prefix_hash);
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ogs_hash_destroy(self.ipv6prefix_hash);
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ogs_pool_final(&bsf_sess_pool);
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context_initialized = 0;
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}
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bsf_context_t *bsf_self(void)
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{
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return &self;
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}
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static int bsf_context_prepare(void)
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{
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return OGS_OK;
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}
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static int bsf_context_validation(void)
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{
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return OGS_OK;
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}
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int bsf_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 = bsf_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, "bsf")) {
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ogs_yaml_iter_t bsf_iter;
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ogs_yaml_iter_recurse(&root_iter, &bsf_iter);
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while (ogs_yaml_iter_next(&bsf_iter)) {
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const char *bsf_key = ogs_yaml_iter_key(&bsf_iter);
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ogs_assert(bsf_key);
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if (!strcmp(bsf_key, "sbi")) {
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/* handle config in sbi library */
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} else if (!strcmp(bsf_key, "service_name")) {
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/* handle config in sbi library */
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} else
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ogs_warn("unknown key `%s`", bsf_key);
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}
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}
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}
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rv = bsf_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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bsf_sess_t *bsf_sess_add_by_snssai_and_dnn(ogs_s_nssai_t *s_nssai, char *dnn)
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{
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bsf_sess_t *sess = NULL;
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ogs_assert(s_nssai);
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ogs_assert(s_nssai->sst);
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ogs_assert(dnn);
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ogs_pool_alloc(&bsf_sess_pool, &sess);
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if (!sess) {
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ogs_error("Maximum number of session[%lld] reached",
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(long long)ogs_app()->pool.sess);
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return NULL;
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}
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memset(sess, 0, sizeof *sess);
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/* SBI Features */
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OGS_SBI_FEATURES_SET(sess->management_features,
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OGS_SBI_NBSF_MANAGEMENT_BINDING_UPDATE);
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sess->s_nssai.sst = s_nssai->sst;
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sess->s_nssai.sd.v = s_nssai->sd.v;
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sess->dnn = ogs_strdup(dnn);
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ogs_assert(sess->dnn);
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sess->binding_id = ogs_msprintf("%d",
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(int)ogs_pool_index(&bsf_sess_pool, sess));
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ogs_assert(sess->binding_id);
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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 bsf_sess_remove(bsf_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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ogs_assert(sess->binding_id);
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ogs_free(sess->binding_id);
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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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clear_ipv4addr(sess);
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clear_ipv6prefix(sess);
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ogs_assert(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->num_of_pcf_ip; i++) {
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if (sess->pcf_ip[i].addr)
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ogs_free(sess->pcf_ip[i].addr);
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if (sess->pcf_ip[i].addr6)
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ogs_free(sess->pcf_ip[i].addr6);
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}
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sess->num_of_pcf_ip = 0;
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ogs_pool_free(&bsf_sess_pool, sess);
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}
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void bsf_sess_remove_all(void)
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{
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bsf_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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bsf_sess_remove(sess);
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}
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static void clear_ipv4addr(bsf_sess_t *sess)
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{
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ogs_assert(sess);
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if (sess->ipv4addr_string) {
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ogs_hash_set(self.ipv4addr_hash,
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&sess->ipv4addr, sizeof(sess->ipv4addr), NULL);
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ogs_free(sess->ipv4addr_string);
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}
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}
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static void clear_ipv6prefix(bsf_sess_t *sess)
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{
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ogs_assert(sess);
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if (sess->ipv6prefix_string) {
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ogs_hash_set(self.ipv6prefix_hash,
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&sess->ipv6prefix, (sess->ipv6prefix.len >> 3) + 1, NULL);
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ogs_free(sess->ipv6prefix_string);
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}
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}
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bool bsf_sess_set_ipv4addr(bsf_sess_t *sess, char *ipv4addr_string)
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{
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int rv;
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ogs_assert(sess);
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ogs_assert(ipv4addr_string);
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clear_ipv4addr(sess);
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rv = ogs_ipv4_from_string(&sess->ipv4addr, ipv4addr_string);
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ogs_expect_or_return_val(rv == OGS_OK, false);
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sess->ipv4addr_string = ogs_strdup(ipv4addr_string);
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ogs_expect_or_return_val(sess->ipv4addr_string, false);
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ogs_hash_set(self.ipv4addr_hash,
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&sess->ipv4addr, sizeof(sess->ipv4addr), sess);
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return true;
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}
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bool bsf_sess_set_ipv6prefix(bsf_sess_t *sess, char *ipv6prefix_string)
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{
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int rv;
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ogs_assert(sess);
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ogs_assert(ipv6prefix_string);
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clear_ipv6prefix(sess);
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rv = ogs_ipv6prefix_from_string(
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sess->ipv6prefix.addr6, &sess->ipv6prefix.len, ipv6prefix_string);
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ogs_expect_or_return_val(rv == OGS_OK, false);
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ogs_assert(sess->ipv6prefix.len == OGS_IPV6_128_PREFIX_LEN);
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sess->ipv6prefix_string = ogs_strdup(ipv6prefix_string);
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ogs_expect_or_return_val(sess->ipv6prefix_string, false);
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ogs_hash_set(self.ipv6prefix_hash,
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&sess->ipv6prefix, (sess->ipv6prefix.len >> 3) + 1, sess);
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return true;
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}
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bsf_sess_t *bsf_sess_find(uint32_t index)
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{
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return ogs_pool_find(&bsf_sess_pool, index);
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}
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bsf_sess_t *bsf_sess_find_by_snssai_and_dnn(ogs_s_nssai_t *s_nssai, char *dnn)
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{
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bsf_sess_t *sess = NULL;
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ogs_assert(s_nssai);
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ogs_assert(dnn);
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ogs_list_for_each(&self.sess_list, sess)
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if (sess->s_nssai.sst == s_nssai->sst &&
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sess->dnn && strcmp(sess->dnn, dnn) == 0)
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return sess;
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return NULL;
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}
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bsf_sess_t *bsf_sess_find_by_binding_id(char *binding_id)
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{
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ogs_assert(binding_id);
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return bsf_sess_find(atoll(binding_id));
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}
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bsf_sess_t *bsf_sess_find_by_ipv4addr(char *ipv4addr_string)
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{
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uint32_t ipv4addr;
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int rv;
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ogs_assert(ipv4addr_string);
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rv = ogs_ipv4_from_string(&ipv4addr, ipv4addr_string);
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ogs_expect_or_return_val(rv == OGS_OK, NULL);
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return ogs_hash_get(self.ipv4addr_hash, &ipv4addr, sizeof(ipv4addr));
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}
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bsf_sess_t *bsf_sess_find_by_ipv6prefix(char *ipv6prefix_string)
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{
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int rv;
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struct {
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uint8_t len;
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uint8_t addr6[OGS_IPV6_LEN];
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} ipv6prefix;
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ogs_assert(ipv6prefix_string);
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rv = ogs_ipv6prefix_from_string(
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ipv6prefix.addr6, &ipv6prefix.len, ipv6prefix_string);
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ogs_assert(rv == OGS_OK);
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ogs_assert(ipv6prefix.len == OGS_IPV6_128_PREFIX_LEN);
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return ogs_hash_get(self.ipv6prefix_hash,
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&ipv6prefix, (ipv6prefix.len >> 3) + 1);
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}
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