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janusdata / raw_data /open5gs_source_code /src /smf /context.c
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/*
 * Copyright (C) 2019-2024 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"
static smf_context_t self;
static ogs_diam_config_t g_diam_conf;
int __smf_log_domain;
int __gsm_log_domain;
static OGS_POOL(smf_gtp_node_pool, smf_gtp_node_t);
static OGS_POOL(smf_ue_pool, smf_ue_t);
static OGS_POOL(smf_bearer_pool, smf_bearer_t);
static OGS_POOL(smf_pf_pool, smf_pf_t);
static OGS_POOL(smf_sess_pool, smf_sess_t);
static OGS_POOL(smf_n4_seid_pool, ogs_pool_id_t);
static int context_initialized = 0;
static int num_of_smf_sess = 0;
static void stats_add_smf_session(void);
static void stats_remove_smf_session(smf_sess_t *sess);
int smf_ctf_config_init(smf_ctf_config_t *ctf_config)
{
 ctf_config->enabled = SMF_CTF_ENABLED_AUTO;
 return OGS_OK;
}
/* Shall Gy session be used according to policy and state? 1: yes, 0: no, -1: reject */
int smf_use_gy_iface(void)
{
 switch (smf_self()->ctf_config.enabled) {
 case SMF_CTF_ENABLED_AUTO:
 return ogs_diam_app_connected(OGS_DIAM_GY_APPLICATION_ID) ? 1 : 0;
 case SMF_CTF_ENABLED_YES:
 return ogs_diam_app_connected(OGS_DIAM_GY_APPLICATION_ID) ? 1 : -1;
 case SMF_CTF_ENABLED_NO:
 return 0;
 default:
 return -1;
 }
}
void smf_context_init(void)
{
 ogs_assert(context_initialized == 0);
/* Initial FreeDiameter Config */
 memset(&g_diam_conf, 0, sizeof(ogs_diam_config_t));
/* Initialize SMF context */
 memset(&self, 0, sizeof(smf_context_t));
 smf_ctf_config_init(&self.ctf_config);
 self.diam_config = &g_diam_conf;
ogs_log_install_domain(&__ogs_ngap_domain, "ngap", ogs_core()->log.level);
 ogs_log_install_domain(&__ogs_nas_domain, "nas", ogs_core()->log.level);
 ogs_log_install_domain(&__ogs_diam_domain, "diam", ogs_core()->log.level);
 ogs_log_install_domain(&__smf_log_domain, "smf", ogs_core()->log.level);
 ogs_log_install_domain(&__gsm_log_domain, "gsm", ogs_core()->log.level);
ogs_pool_init(&smf_gtp_node_pool, ogs_app()->pool.nf);
 ogs_pool_init(&smf_ue_pool, ogs_global_conf()->max.ue);
 ogs_pool_init(&smf_bearer_pool, ogs_app()->pool.bearer);
 ogs_pool_init(&smf_pf_pool,
 ogs_app()->pool.bearer * OGS_MAX_NUM_OF_FLOW_IN_BEARER);
ogs_pool_init(&smf_sess_pool, ogs_app()->pool.sess);
 ogs_pool_init(&smf_n4_seid_pool, ogs_app()->pool.sess);
 ogs_pool_random_id_generate(&smf_n4_seid_pool);
self.supi_hash = ogs_hash_make();
 ogs_assert(self.supi_hash);
 self.imsi_hash = ogs_hash_make();
 ogs_assert(self.imsi_hash);
 self.smf_n4_seid_hash = ogs_hash_make();
 ogs_assert(self.smf_n4_seid_hash);
 self.ipv4_hash = ogs_hash_make();
 ogs_assert(self.ipv4_hash);
 self.ipv6_hash = ogs_hash_make();
 ogs_assert(self.ipv6_hash);
 self.n1n2message_hash = ogs_hash_make();
 ogs_assert(self.n1n2message_hash);
context_initialized = 1;
}
void smf_context_final(void)
{
 ogs_gtp_node_t *gnode = NULL, *next_gnode = NULL;
 ogs_assert(context_initialized == 1);
smf_ue_remove_all();
ogs_assert(self.supi_hash);
 ogs_hash_destroy(self.supi_hash);
 ogs_assert(self.imsi_hash);
 ogs_hash_destroy(self.imsi_hash);
 ogs_assert(self.smf_n4_seid_hash);
 ogs_hash_destroy(self.smf_n4_seid_hash);
 ogs_assert(self.ipv4_hash);
 ogs_hash_destroy(self.ipv4_hash);
 ogs_assert(self.ipv6_hash);
 ogs_hash_destroy(self.ipv6_hash);
 ogs_assert(self.n1n2message_hash);
 ogs_hash_destroy(self.n1n2message_hash);
ogs_pool_final(&smf_ue_pool);
 ogs_pool_final(&smf_bearer_pool);
 ogs_pool_final(&smf_pf_pool);
ogs_pool_final(&smf_sess_pool);
 ogs_pool_final(&smf_n4_seid_pool);
ogs_list_for_each_entry_safe(&self.sgw_s5c_list, next_gnode, gnode, node) {
 smf_gtp_node_t *smf_gnode = gnode->data_ptr;
 ogs_assert(smf_gnode);
 smf_gtp_node_free(smf_gnode);
 ogs_gtp_node_remove(&self.sgw_s5c_list, gnode);
 }
ogs_pool_final(&smf_gtp_node_pool);
context_initialized = 0;
}
smf_context_t *smf_self(void)
{
 return &self;
}
static int smf_context_prepare(void)
{
 self.diam_config->cnf_port = DIAMETER_PORT;
 self.diam_config->cnf_port_tls = DIAMETER_SECURE_PORT;
return OGS_OK;
}
static int smf_context_validation(void)
{
 ogs_sbi_nf_instance_t *nf_instance = NULL;
 ogs_sbi_nf_info_t *nf_info = NULL;
nf_instance = ogs_sbi_self()->nf_instance;
 ogs_assert(nf_instance);
if (self.dns[0] == NULL && self.dns6[0] == NULL) {
 ogs_error("No smf.dns in '%s'", ogs_app()->file);
 return OGS_ERROR;
 }
 if (ogs_list_first(&ogs_gtp_self()->gtpu_list) == NULL) {
 ogs_error("No smf.gtpu.address in '%s'", ogs_app()->file);
 return OGS_ERROR;
 }
 if (ogs_list_first(&ogs_pfcp_self()->subnet_list) == NULL) {
 ogs_error("No smf.session.subnet: in '%s'", ogs_app()->file);
 return OGS_ERROR;
 }
ogs_list_for_each(&nf_instance->nf_info_list, nf_info) {
 int i;
 ogs_sbi_smf_info_t *smf_info = &nf_info->smf;
 ogs_assert(smf_info);
if (smf_info->num_of_slice == 0) {
 ogs_error("CHECK CONFIGURATION: No S-NSSAI in smfInfo");
 return OGS_ERROR;
 }
for (i = 0; i < smf_info->num_of_slice; i++) {
 if (smf_info->slice[i].num_of_dnn == 0) {
 ogs_error("CHECK CONFIGURATION: No DNN in SST[%d] SD[0x%x]",
 smf_info->slice[i].s_nssai.sst,
 smf_info->slice[i].s_nssai.sd.v);
 return OGS_ERROR;
 }
 }
 for (i = 0; i < smf_info->num_of_nr_tai_range; i++) {
 if (smf_info->nr_tai_range[i].num_of_tac_range == 0) {
 ogs_error("CHECK CONFIGURATION: No TacRange in "
 "MCC[%d] MNC[0x%x]",
 ogs_plmn_id_mcc(&smf_info->nr_tai[i].plmn_id),
 ogs_plmn_id_mnc(&smf_info->nr_tai[i].plmn_id));
 return OGS_ERROR;
 }
 }
 }
if (self.security_indication.integrity_protection_indication ||
 self.security_indication.confidentiality_protection_indication) {
 if (!self.security_indication.integrity_protection_indication ||
 !self.security_indication.confidentiality_protection_indication) {
 ogs_error("Invalid security_indication [%s,%s]",
 self.security_indication.integrity_protection_indication ?
 self.security_indication.integrity_protection_indication :
 "No integrity_protection_indication",
 self.security_indication.confidentiality_protection_indication ?
 self.security_indication.confidentiality_protection_indication :
 "No confidentiality_protection_indication");
 return OGS_ERROR;
 }
 if (smf_integrity_protection_indication_value2enum(
 self.security_indication.integrity_protection_indication) < 0) {
 ogs_error("Invalid integrity_protection_indication [%s]",
 self.security_indication.integrity_protection_indication);
 return OGS_ERROR;
 }
 if (smf_confidentiality_protection_indication_value2enum(
 self.security_indication.
 confidentiality_protection_indication) < 0) {
 ogs_error("Invalid confidentiality_protection_indication [%s]",
 self.security_indication.confidentiality_protection_indication);
 return OGS_ERROR;
 }
 }
if (self.security_indication.maximum_integrity_protected_data_rate_uplink) {
 NGAP_IntegrityProtectionIndication_t integrityProtectionIndication;
 if (smf_maximum_integrity_protected_data_rate_uplink_value2enum(
 self.security_indication.
 maximum_integrity_protected_data_rate_uplink) < 0) {
 ogs_error("Invalid "
 "maximum_integrity_protected_data_rate_uplink [%s]",
 self.security_indication.
 maximum_integrity_protected_data_rate_uplink);
 return OGS_ERROR;
 }
 integrityProtectionIndication =
 smf_integrity_protection_indication_value2enum(
 self.security_indication.integrity_protection_indication);
 if (integrityProtectionIndication ==
 NGAP_IntegrityProtectionIndication_required ||
 integrityProtectionIndication ==
 NGAP_IntegrityProtectionIndication_preferred) {
 } else {
 ogs_error("Invalid security_indication [%s:UL-%s]",
 self.security_indication.integrity_protection_indication ?
 self.security_indication.integrity_protection_indication :
 "No integrity_protection_indication",
 self.security_indication.
 maximum_integrity_protected_data_rate_uplink ?
 self.security_indication.
 maximum_integrity_protected_data_rate_uplink :
 "No integrity_protection_indication");
 return OGS_ERROR;
 }
 }
if (self.security_indication.maximum_integrity_protected_data_rate_downlink) {
 if (smf_maximum_integrity_protected_data_rate_downlink_value2enum(
 self.security_indication.
 maximum_integrity_protected_data_rate_downlink) < 0) {
 ogs_error("Invalid "
 "maximum_integrity_protected_data_rate_downlink [%s]",
 self.security_indication.
 maximum_integrity_protected_data_rate_downlink);
 return OGS_ERROR;
 }
 if (!self.security_indication.
 maximum_integrity_protected_data_rate_uplink) {
 ogs_error("No maximum_integrity_protected_data_rate_uplink");
 return OGS_ERROR;
 }
 }
return OGS_OK;
}
int smf_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 = smf_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, "smf")) {
 ogs_yaml_iter_t smf_iter;
 ogs_yaml_iter_recurse(&root_iter, &smf_iter);
 while (ogs_yaml_iter_next(&smf_iter)) {
 const char *smf_key = ogs_yaml_iter_key(&smf_iter);
 ogs_assert(smf_key);
 if (!strcmp(smf_key, "freeDiameter")) {
 yaml_node_t *node =
 yaml_document_get_node(document, smf_iter.pair->value);
 ogs_assert(node);
 if (node->type == YAML_SCALAR_NODE) {
 self.diam_conf_path = ogs_yaml_iter_value(&smf_iter);
 } else if (node->type == YAML_MAPPING_NODE) {
 ogs_yaml_iter_t fd_iter;
 ogs_yaml_iter_recurse(&smf_iter, &fd_iter);
while (ogs_yaml_iter_next(&fd_iter)) {
 const char *fd_key = ogs_yaml_iter_key(&fd_iter);
 ogs_assert(fd_key);
 if (!strcmp(fd_key, "identity")) {
 self.diam_config->cnf_diamid =
 ogs_yaml_iter_value(&fd_iter);
 } else if (!strcmp(fd_key, "realm")) {
 self.diam_config->cnf_diamrlm =
 ogs_yaml_iter_value(&fd_iter);
 } else if (!strcmp(fd_key, "port")) {
 const char *v = ogs_yaml_iter_value(&fd_iter);
 if (v) self.diam_config->cnf_port = atoi(v);
 } else if (!strcmp(fd_key, "sec_port")) {
 const char *v = ogs_yaml_iter_value(&fd_iter);
 if (v) self.diam_config->cnf_port_tls = atoi(v);
 } else if (!strcmp(fd_key, "listen_on")) {
 self.diam_config->cnf_addr =
 ogs_yaml_iter_value(&fd_iter);
 } else if (!strcmp(fd_key, "no_fwd")) {
 self.diam_config->cnf_flags.no_fwd =
 ogs_yaml_iter_bool(&fd_iter);
 } else if (!strcmp(fd_key, "load_extension")) {
 ogs_yaml_iter_t ext_array, ext_iter;
 ogs_yaml_iter_recurse(&fd_iter, &ext_array);
 do {
 const char *module = NULL;
 const char *conf = NULL;
if (ogs_yaml_iter_type(&ext_array) ==
 YAML_MAPPING_NODE) {
 memcpy(&ext_iter, &ext_array,
 sizeof(ogs_yaml_iter_t));
 } else if (ogs_yaml_iter_type(&ext_array) ==
 YAML_SEQUENCE_NODE) {
 if (!ogs_yaml_iter_next(&ext_array))
 break;
 ogs_yaml_iter_recurse(
 &ext_array, &ext_iter);
 } else if (ogs_yaml_iter_type(&ext_array) ==
 YAML_SCALAR_NODE) {
 break;
 } else
 ogs_assert_if_reached();
while (ogs_yaml_iter_next(&ext_iter)) {
 const char *ext_key =
 ogs_yaml_iter_key(&ext_iter);
 ogs_assert(ext_key);
 if (!strcmp(ext_key, "module")) {
 module = ogs_yaml_iter_value(
 &ext_iter);
 } else if (!strcmp(ext_key, "conf")) {
 conf = ogs_yaml_iter_value(
 &ext_iter);
 } else
 ogs_warn("unknown key `%s`",
 ext_key);
 }
if (module) {
 self.diam_config->
 ext[self.diam_config->num_of_ext].
 module = module;
 self.diam_config->
 ext[self.diam_config->num_of_ext].
 conf = conf;
 self.diam_config->num_of_ext++;
 }
 } while (ogs_yaml_iter_type(&ext_array) ==
 YAML_SEQUENCE_NODE);
 } else if (!strcmp(fd_key, "connect")) {
 ogs_yaml_iter_t conn_array, conn_iter;
 ogs_yaml_iter_recurse(&fd_iter, &conn_array);
 do {
 const char *identity = NULL;
 const char *addr = NULL;
 uint16_t port = 0;
 int tc_timer = 0;
if (ogs_yaml_iter_type(&conn_array) ==
 YAML_MAPPING_NODE) {
 memcpy(&conn_iter, &conn_array,
 sizeof(ogs_yaml_iter_t));
 } else if (ogs_yaml_iter_type(
 &conn_array) == YAML_SEQUENCE_NODE) {
 if (!ogs_yaml_iter_next(&conn_array))
 break;
 ogs_yaml_iter_recurse(&conn_array,
 &conn_iter);
 } else if (ogs_yaml_iter_type(
 &conn_array) == YAML_SCALAR_NODE) {
 break;
 } else
 ogs_assert_if_reached();
while (ogs_yaml_iter_next(&conn_iter)) {
 const char *conn_key =
 ogs_yaml_iter_key(&conn_iter);
 ogs_assert(conn_key);
 if (!strcmp(conn_key, "identity")) {
 identity =
 ogs_yaml_iter_value(&conn_iter);
 } else if (!strcmp(conn_key,
 "address")) {
 addr =
 ogs_yaml_iter_value(&conn_iter);
 } else if (!strcmp(conn_key, "port")) {
 const char *v =
 ogs_yaml_iter_value(&conn_iter);
 if (v) port = atoi(v);
 } else if (!strcmp(conn_key, "tc_timer")) {
 const char *v =
 ogs_yaml_iter_value(&conn_iter);
 if (v) tc_timer = atoi(v);
 } else
 ogs_warn("unknown key `%s`",
 conn_key);
 }
if (identity && addr) {
 self.diam_config->
 conn[self.diam_config->num_of_conn].
 identity = identity;
 self.diam_config->
 conn[self.diam_config->num_of_conn].
 addr = addr;
 self.diam_config->
 conn[self.diam_config->num_of_conn].
 port = port;
 self.diam_config->
 conn[self.diam_config->num_of_conn].
 tc_timer = tc_timer;
 self.diam_config->num_of_conn++;
 }
 } while (ogs_yaml_iter_type(&conn_array) ==
 YAML_SEQUENCE_NODE);
 } else if (!strcmp(fd_key, "tc_timer")) {
 const char *v = ogs_yaml_iter_value(&fd_iter);
 if (v) self.diam_config->cnf_timer_tc = atoi(v);
 } else
 ogs_warn("unknown key `%s`", fd_key);
 }
 }
 } else if (!strcmp(smf_key, "ctf")) {
 ogs_yaml_iter_t ctf_iter;
 yaml_node_t *node =
 yaml_document_get_node(document, smf_iter.pair->value);
 ogs_assert(node);
 ogs_assert(node->type == YAML_MAPPING_NODE);
 ogs_yaml_iter_recurse(&smf_iter, &ctf_iter);
 while (ogs_yaml_iter_next(&ctf_iter)) {
 const char *ctf_key = ogs_yaml_iter_key(&ctf_iter);
 ogs_assert(ctf_key);
 if (!strcmp(ctf_key, "enabled")) {
 yaml_node_t *ctf_node = yaml_document_get_node(
 document, ctf_iter.pair->value);
 ogs_assert(ctf_node->type == YAML_SCALAR_NODE);
 const char* enabled =
 ogs_yaml_iter_value(&ctf_iter);
 if (!strcmp(enabled, "auto"))
 self.ctf_config.enabled = SMF_CTF_ENABLED_AUTO;
 else if (!strcmp(enabled, "yes"))
 self.ctf_config.enabled = SMF_CTF_ENABLED_YES;
 else if (!strcmp(enabled, "no"))
 self.ctf_config.enabled = SMF_CTF_ENABLED_NO;
 else
 ogs_warn("unknown 'enabled' value `%s`",
 enabled);
 } else
 ogs_warn("unknown key `%s`", ctf_key);
 }
 } else if (!strcmp(smf_key, "gtpc")) {
 /* handle config in gtp library */
 } else if (!strcmp(smf_key, "gtpu")) {
 /* handle config in gtp library */
 } else if (!strcmp(smf_key, "dns")) {
 ogs_yaml_iter_t dns_iter;
 ogs_yaml_iter_recurse(&smf_iter, &dns_iter);
 ogs_assert(ogs_yaml_iter_type(&dns_iter) !=
 YAML_MAPPING_NODE);
do {
 const char *v = NULL;
if (ogs_yaml_iter_type(&dns_iter) ==
 YAML_SEQUENCE_NODE) {
 if (!ogs_yaml_iter_next(&dns_iter))
 break;
 }
v = ogs_yaml_iter_value(&dns_iter);
 if (v && strlen(v)) {
 ogs_ipsubnet_t ipsub;
 rv = ogs_ipsubnet(&ipsub, v, NULL);
 ogs_assert(rv == OGS_OK);
if (ipsub.family == AF_INET) {
 if (self.dns[0] && self.dns[1])
 ogs_warn("Ignore DNS : %s", v);
 else if (self.dns[0]) self.dns[1] = v;
 else self.dns[0] = v;
 }
 else if (ipsub.family == AF_INET6) {
 if (self.dns6[0] && self.dns6[1])
 ogs_warn("Ignore DNS : %s", v);
 else if (self.dns6[0]) self.dns6[1] = v;
 else self.dns6[0] = v;
 } else
 ogs_warn("Ignore DNS : %s", v);
 }
} while (ogs_yaml_iter_type(&dns_iter) ==
 YAML_SEQUENCE_NODE);
 } else if (!strcmp(smf_key, "mtu")) {
 ogs_assert(ogs_yaml_iter_type(&smf_iter) !=
 YAML_SCALAR_NODE);
 self.mtu = atoi(ogs_yaml_iter_value(&smf_iter));
 ogs_assert(self.mtu);
 } else if (!strcmp(smf_key, "p-cscf")) {
 ogs_yaml_iter_t p_cscf_iter;
 ogs_yaml_iter_recurse(&smf_iter, &p_cscf_iter);
 ogs_assert(ogs_yaml_iter_type(&p_cscf_iter) !=
 YAML_MAPPING_NODE);
self.num_of_p_cscf = 0;
 self.num_of_p_cscf6 = 0;
 do {
 const char *v = NULL;
if (ogs_yaml_iter_type(&p_cscf_iter) ==
 YAML_SEQUENCE_NODE) {
 if (!ogs_yaml_iter_next(&p_cscf_iter))
 break;
 }
v = ogs_yaml_iter_value(&p_cscf_iter);
 if (v) {
 ogs_ipsubnet_t ipsub;
 rv = ogs_ipsubnet(&ipsub, v, NULL);
 ogs_assert(rv == OGS_OK);
if (ipsub.family == AF_INET) {
 if (self.num_of_p_cscf >= MAX_NUM_OF_P_CSCF)
 ogs_warn("Ignore P-CSCF : %s", v);
 else self.p_cscf[self.num_of_p_cscf++] = v;
 }
 else if (ipsub.family == AF_INET6) {
 if (self.num_of_p_cscf6 >= MAX_NUM_OF_P_CSCF)
 ogs_warn("Ignore P-CSCF : %s", v);
 else self.p_cscf6[self.num_of_p_cscf6++] = v;
 } else
 ogs_warn("Ignore P-CSCF : %s", v);
 }
} while (ogs_yaml_iter_type(&p_cscf_iter) ==
 YAML_SEQUENCE_NODE);
 } else if (!strcmp(smf_key, "info")) {
 ogs_sbi_nf_instance_t *nf_instance = NULL;
ogs_yaml_iter_t info_array, info_iter;
 ogs_yaml_iter_recurse(&smf_iter, &info_array);
nf_instance = ogs_sbi_self()->nf_instance;
 ogs_assert(nf_instance);
do {
 ogs_sbi_nf_info_t *nf_info = NULL;
 ogs_sbi_smf_info_t *smf_info = NULL;
if (ogs_yaml_iter_type(&info_array) ==
 YAML_MAPPING_NODE) {
 memcpy(&info_iter, &info_array,
 sizeof(ogs_yaml_iter_t));
 } else if (ogs_yaml_iter_type(&info_array) ==
 YAML_SEQUENCE_NODE) {
 if (!ogs_yaml_iter_next(&info_array))
 break;
 ogs_yaml_iter_recurse(&info_array, &info_iter);
 } else if (ogs_yaml_iter_type(&info_array) ==
 YAML_SCALAR_NODE) {
 break;
 } else
 ogs_assert_if_reached();
nf_info = ogs_sbi_nf_info_add(
 &nf_instance->nf_info_list,
 OpenAPI_nf_type_SMF);
 ogs_assert(nf_info);
smf_info = &nf_info->smf;
 ogs_assert(smf_info);
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, "s_nssai")) {
 int num_of_slice = 0;
ogs_yaml_iter_t s_nssai_array, s_nssai_iter;
 ogs_yaml_iter_recurse(&info_iter,
 &s_nssai_array);
 do {
 ogs_s_nssai_t *s_nssai = NULL;
 const char *sst = NULL, *sd = NULL;
 int num_of_dnn = 0;
 const char *dnn[OGS_MAX_NUM_OF_DNN];
ogs_assert(num_of_slice <
 OGS_MAX_NUM_OF_SLICE);
 s_nssai = &smf_info->slice[num_of_slice].
 s_nssai;
 ogs_assert(s_nssai);
if (ogs_yaml_iter_type(&s_nssai_array) ==
 YAML_MAPPING_NODE) {
 memcpy(&s_nssai_iter, &s_nssai_array,
 sizeof(ogs_yaml_iter_t));
 } else if (ogs_yaml_iter_type(
 &s_nssai_array) ==
 YAML_SEQUENCE_NODE) {
 if (!ogs_yaml_iter_next(&s_nssai_array))
 break;
 ogs_yaml_iter_recurse(&s_nssai_array,
 &s_nssai_iter);
 } else if (ogs_yaml_iter_type(
 &s_nssai_array) ==
 YAML_SCALAR_NODE) {
 break;
 } else
 ogs_assert_if_reached();
while (ogs_yaml_iter_next(&s_nssai_iter)) {
 const char *s_nssai_key =
 ogs_yaml_iter_key(&s_nssai_iter);
 ogs_assert(s_nssai_key);
 if (!strcmp(s_nssai_key, "sst")) {
 sst = ogs_yaml_iter_value(
 &s_nssai_iter);
 } else if (!strcmp(s_nssai_key, "sd")) {
 sd = ogs_yaml_iter_value(
 &s_nssai_iter);
 } else if (!strcmp(s_nssai_key,
 "dnn")) {
 ogs_yaml_iter_t dnn_iter;
 ogs_yaml_iter_recurse(&s_nssai_iter,
 &dnn_iter);
 ogs_assert(ogs_yaml_iter_type(
 &dnn_iter) !=
 YAML_MAPPING_NODE);
do {
 const char *v = NULL;
if (ogs_yaml_iter_type(
 &dnn_iter) ==
 YAML_SEQUENCE_NODE) {
 if (!ogs_yaml_iter_next(
 &dnn_iter))
 break;
 }
v = ogs_yaml_iter_value(
 &dnn_iter);
 if (v) {
 ogs_assert(num_of_dnn <
 OGS_MAX_NUM_OF_DNN);
 dnn[num_of_dnn++] = v;
 }
 } while (ogs_yaml_iter_type(
 &dnn_iter) ==
 YAML_SEQUENCE_NODE);
 }
 }
if (sst) {
 int i;
s_nssai->sst = atoi(sst);
 if (sd)
 s_nssai->sd =
 ogs_uint24_from_string(
 (char*)sd);
 else
 s_nssai->sd.v =
 OGS_S_NSSAI_NO_SD_VALUE;
ogs_assert(num_of_dnn <
 OGS_MAX_NUM_OF_DNN);
for (i = 0; i < num_of_dnn; i++) {
 smf_info->slice[num_of_slice].
 dnn[i] = ogs_strdup(dnn[i]);
 ogs_assert(
 smf_info->slice[num_of_slice].
 dnn[i]);
 }
smf_info->slice[num_of_slice].
 num_of_dnn = num_of_dnn;
num_of_slice++;
 }
 } while (ogs_yaml_iter_type(&s_nssai_array) ==
 YAML_SEQUENCE_NODE);
smf_info->num_of_slice = num_of_slice;
} else if (!strcmp(info_key, "tai")) {
 int num_of_nr_tai = 0;
 int num_of_nr_tai_range = 0;
ogs_yaml_iter_t tai_array, tai_iter;
 ogs_yaml_iter_recurse(&info_iter, &tai_array);
 do {
 const char *mcc = NULL, *mnc = NULL;
 int num_of_tac = 0;
 ogs_uint24_t start[OGS_MAX_NUM_OF_TAI];
 ogs_uint24_t end[OGS_MAX_NUM_OF_TAI];
if (ogs_yaml_iter_type(&tai_array) ==
 YAML_MAPPING_NODE) {
 memcpy(&tai_iter, &tai_array,
 sizeof(ogs_yaml_iter_t));
 } else if (ogs_yaml_iter_type(&tai_array) ==
 YAML_SEQUENCE_NODE) {
 if (!ogs_yaml_iter_next(&tai_array))
 break;
 ogs_yaml_iter_recurse(&tai_array,
 &tai_iter);
 } else if (ogs_yaml_iter_type(&tai_array) ==
 YAML_SCALAR_NODE) {
 break;
 } else
 ogs_assert_if_reached();
while (ogs_yaml_iter_next(&tai_iter)) {
 const char *tai_key =
 ogs_yaml_iter_key(&tai_iter);
 ogs_assert(tai_key);
 if (!strcmp(tai_key, "plmn_id")) {
 ogs_yaml_iter_t plmn_id_iter;
ogs_yaml_iter_recurse(
 &tai_iter, &plmn_id_iter);
 while (ogs_yaml_iter_next(
 &plmn_id_iter)) {
 const char *plmn_id_key =
 ogs_yaml_iter_key(
 &plmn_id_iter);
 ogs_assert(plmn_id_key);
 if (!strcmp(plmn_id_key,
 "mcc")) {
 mcc = ogs_yaml_iter_value(
 &plmn_id_iter);
 } else if (!strcmp(plmn_id_key,
 "mnc")) {
 mnc = ogs_yaml_iter_value(
 &plmn_id_iter);
 }
 }
 } else if (!strcmp(tai_key, "tac")) {
 ogs_yaml_iter_t tac_iter;
 ogs_yaml_iter_recurse(&tai_iter,
 &tac_iter);
 ogs_assert(ogs_yaml_iter_type(
 &tac_iter) !=
 YAML_MAPPING_NODE);
 do {
 char *v = NULL;
 char *low = NULL, *high = NULL;
if (ogs_yaml_iter_type(
 &tac_iter) ==
 YAML_SEQUENCE_NODE) {
 if (!ogs_yaml_iter_next(
 &tac_iter))
 break;
 }
v = (char *)ogs_yaml_iter_value(
 &tac_iter);
 if (v) {
 low = strsep(&v, "-");
 if (low && strlen(low) == 0)
 low = NULL;
high = v;
 if (high &&
 strlen(high) == 0)
 high = NULL;
if (low) {
 ogs_assert(num_of_tac <
 OGS_MAX_NUM_OF_TAI);
 start[num_of_tac].v =
 atoi(low);
 if (high) {
 end[num_of_tac].v =
 atoi(high);
 if (end[num_of_tac].
 v <
 start[
 num_of_tac].
 v)
 ogs_error(
 "Invalid TAI "
 "range: LOW:%s,"
 "HIGH:%s",
 low, high);
 else
 num_of_tac++;
 } else {
 end[num_of_tac].v =
 start[
 num_of_tac].v;
 num_of_tac++;
 }
 }
 }
 } while (
 ogs_yaml_iter_type(&tac_iter) ==
 YAML_SEQUENCE_NODE);
} else
 ogs_warn("unknown key `%s`",
 tai_key);
 }
if (mcc && mnc && num_of_tac) {
 int tac, num_of_tac_range = 0;
 for (tac = 0; tac < num_of_tac; tac++) {
 ogs_assert(end[tac].v >=
 start[tac].v);
 if (start[tac].v == end[tac].v) {
 ogs_assert(num_of_nr_tai <
 OGS_MAX_NUM_OF_TAI);
 ogs_plmn_id_build(
 &smf_info->nr_tai[
 num_of_nr_tai].plmn_id,
 atoi(mcc), atoi(mnc),
 strlen(mnc));
 smf_info->nr_tai[num_of_nr_tai].
 tac.v = start[tac].v;
 num_of_nr_tai++;
 } else if (start[tac].v <
 end[tac].v) {
 ogs_assert(num_of_nr_tai_range <
 OGS_MAX_NUM_OF_TAI);
 ogs_assert(num_of_tac_range <
 OGS_MAX_NUM_OF_TAI);
 smf_info->nr_tai_range[
 num_of_nr_tai_range].
 start[num_of_tac_range].v =
 start[tac].v;
 smf_info->nr_tai_range[
 num_of_nr_tai_range].
 end[num_of_tac_range].v =
 end[tac].v;
 num_of_tac_range++;
 }
 }
 if (num_of_tac_range) {
 ogs_plmn_id_build(
 &smf_info->nr_tai_range[
 num_of_nr_tai_range].plmn_id,
 atoi(mcc), atoi(mnc),
 strlen(mnc));
 smf_info->nr_tai_range[
 num_of_nr_tai_range].
 num_of_tac_range =
 num_of_tac_range;
 num_of_nr_tai_range++;
 }
 } else {
 ogs_warn("Ignore tai : mcc(%p), "
 "mnc(%p), num_of_tac(%d)",
 mcc, mnc, num_of_tac);
 }
 } while (ogs_yaml_iter_type(&tai_array) ==
 YAML_SEQUENCE_NODE);
smf_info->num_of_nr_tai = num_of_nr_tai;
 smf_info->num_of_nr_tai_range =
 num_of_nr_tai_range;
 } else
 ogs_warn("unknown key `%s`", info_key);
 }
 } while (ogs_yaml_iter_type(&info_array) ==
 YAML_SEQUENCE_NODE);
} else if (!strcmp(smf_key, "security_indication")) {
 ogs_yaml_iter_t security_indication_iter;
 ogs_yaml_iter_recurse(
 &smf_iter, &security_indication_iter);
 while (ogs_yaml_iter_next(&security_indication_iter)) {
 const char *security_indication_key =
 ogs_yaml_iter_key(&security_indication_iter);
 ogs_assert(security_indication_key);
 if (!strcmp(security_indication_key,
 "integrity_protection_indication")) {
 self.security_indication.
 integrity_protection_indication =
 ogs_yaml_iter_value(
 &security_indication_iter);
 } else if (!strcmp(security_indication_key,
 "confidentiality_protection_indication")) {
 self.security_indication.
 confidentiality_protection_indication =
 ogs_yaml_iter_value(
 &security_indication_iter);
 } else if (!strcmp(security_indication_key,
 "maximum_integrity_protected_data_rate_uplink")) {
 self.security_indication.
 maximum_integrity_protected_data_rate_uplink =
 ogs_yaml_iter_value(
 &security_indication_iter);
 } else if (!strcmp(security_indication_key,
 "maximum_integrity_protected_data_rate_downlink")) {
 self.security_indication.
 maximum_integrity_protected_data_rate_downlink =
 ogs_yaml_iter_value(
 &security_indication_iter);
 }
 }
 } else if (!strcmp(smf_key, "pfcp")) {
 /* handle config in pfcp library */
 } else if (!strcmp(smf_key, "upf")) {
 /* handle config in pfcp library */
 } else if (!strcmp(smf_key, "session")) {
 /* handle config in pfcp library */
 } else if (!strcmp(smf_key, "default")) {
 /* handle config in sbi library */
 } else if (!strcmp(smf_key, "sbi")) {
 /* handle config in sbi library */
 } else if (!strcmp(smf_key, "nrf")) {
 /* handle config in sbi library */
 } else if (!strcmp(smf_key, "scp")) {
 /* handle config in sbi library */
 } else if (!strcmp(smf_key, "service_name")) {
 /* handle config in sbi library */
 } else if (!strcmp(smf_key, "discovery")) {
 /* handle config in sbi library */
 } else if (!strcmp(smf_key, "metrics")) {
 /* handle config in metrics library */
 } else
 ogs_warn("unknown key `%s`", smf_key);
 }
 }
 }
rv = smf_context_validation();
 if (rv != OGS_OK) return rv;
return OGS_OK;
}
smf_gtp_node_t *smf_gtp_node_new(ogs_gtp_node_t *gnode)
{
 smf_gtp_node_t *smf_gnode = NULL;
 char addr[OGS_ADDRSTRLEN];
ogs_pool_alloc(&smf_gtp_node_pool, &smf_gnode);
 if (!smf_gnode) {
 ogs_error("ogs_pool_alloc() failed");
 return NULL;
 }
 memset(smf_gnode, 0, sizeof(smf_gtp_node_t));
addr[0] = '\0';
 ogs_assert(gnode->sa_list);
 ogs_inet_ntop(&gnode->sa_list[0].sa, addr, sizeof(addr));
 ogs_assert(smf_metrics_init_inst_gtp_node(smf_gnode->metrics, addr)
 == OGS_OK);
smf_gnode->gnode = gnode;
 gnode->data_ptr = smf_gnode; /* Set backpointer */
 return smf_gnode;
}
void smf_gtp_node_free(smf_gtp_node_t *smf_gnode)
{
 ogs_assert(smf_gnode);
 if (smf_gnode->gnode)
 smf_gnode->gnode->data_ptr = NULL; /* Drop backpointer */
 smf_metrics_free_inst_gtp_node(smf_gnode->metrics);
 ogs_pool_free(&smf_gtp_node_pool, smf_gnode);
}
static smf_ue_t *smf_ue_add(void)
{
 smf_ue_t *smf_ue = NULL;
ogs_pool_id_calloc(&smf_ue_pool, &smf_ue);
 if (!smf_ue) {
 ogs_error("Maximum number of smf_ue[%lld] reached",
 (long long)ogs_global_conf()->max.ue);
 return NULL;
 }
ogs_list_init(&smf_ue->sess_list);
ogs_list_add(&self.smf_ue_list, smf_ue);
smf_metrics_inst_global_inc(SMF_METR_GLOB_GAUGE_UES_ACTIVE);
 ogs_info("[Added] Number of SMF-UEs is now %d",
 ogs_list_count(&self.smf_ue_list));
 return smf_ue;
}
smf_ue_t *smf_ue_add_by_supi(char *supi)
{
 smf_ue_t *smf_ue;
ogs_assert(supi);
if ((smf_ue = smf_ue_add()) == NULL) {
 ogs_error("smf_ue_add_by_supi() failed");
 return NULL;
 }
smf_ue->supi = ogs_strdup(supi);
 ogs_assert(smf_ue->supi);
 ogs_hash_set(self.supi_hash, smf_ue->supi, strlen(smf_ue->supi), smf_ue);
return smf_ue;
}
smf_ue_t *smf_ue_add_by_imsi(uint8_t *imsi, int imsi_len)
{
 smf_ue_t *smf_ue;
ogs_assert(imsi);
 ogs_assert(imsi_len);
if ((smf_ue = smf_ue_add()) == NULL)
 return NULL;;
smf_ue->imsi_len = ogs_min(imsi_len, OGS_MAX_IMSI_LEN);
 memcpy(smf_ue->imsi, imsi, smf_ue->imsi_len);
 ogs_buffer_to_bcd(smf_ue->imsi, smf_ue->imsi_len, smf_ue->imsi_bcd);
 ogs_hash_set(self.imsi_hash, smf_ue->imsi, smf_ue->imsi_len, smf_ue);
return smf_ue;
}
void smf_ue_remove(smf_ue_t *smf_ue)
{
 ogs_assert(smf_ue);
ogs_list_remove(&self.smf_ue_list, smf_ue);
smf_sess_remove_all(smf_ue);
if (smf_ue->supi) {
 ogs_hash_set(self.supi_hash, smf_ue->supi, strlen(smf_ue->supi), NULL);
 ogs_free(smf_ue->supi);
 }
if (smf_ue->imsi_len) {
 ogs_hash_set(self.imsi_hash, smf_ue->imsi, smf_ue->imsi_len, NULL);
 }
ogs_pool_id_free(&smf_ue_pool, smf_ue);
smf_metrics_inst_global_dec(SMF_METR_GLOB_GAUGE_UES_ACTIVE);
 ogs_info("[Removed] Number of SMF-UEs is now %d",
 ogs_list_count(&self.smf_ue_list));
}
void smf_ue_remove_all(void)
{
 smf_ue_t *smf_ue = NULL, *next = NULL;;
ogs_list_for_each_safe(&self.smf_ue_list, next, smf_ue)
 smf_ue_remove(smf_ue);
}
smf_ue_t *smf_ue_find_by_supi(char *supi)
{
 ogs_assert(supi);
 return (smf_ue_t *)ogs_hash_get(self.supi_hash, supi, strlen(supi));
}
smf_ue_t *smf_ue_find_by_imsi(uint8_t *imsi, int imsi_len)
{
 ogs_assert(imsi);
 ogs_assert(imsi_len);
 return (smf_ue_t *)ogs_hash_get(self.imsi_hash, imsi, imsi_len);
}
static bool compare_ue_info(ogs_pfcp_node_t *node, smf_sess_t *sess)
{
 int i;
ogs_assert(node);
 ogs_assert(sess);
 ogs_assert(sess->session.name);
for (i = 0; i < node->num_of_dnn; i++)
 if (ogs_strcasecmp(node->dnn[i], sess->session.name) == 0) return true;
for (i = 0; i < node->num_of_e_cell_id; i++)
 if (sess->gtp_rat_type == OGS_GTP2_RAT_TYPE_EUTRAN &&
 node->e_cell_id[i] == sess->e_cgi.cell_id) return true;
for (i = 0; i < node->num_of_nr_cell_id; i++)
 if (node->nr_cell_id[i] == sess->nr_cgi.cell_id) return true;
for (i = 0; i < node->num_of_tac; i++)
 if ((sess->gtp_rat_type == OGS_GTP2_RAT_TYPE_EUTRAN &&
 node->tac[i] == sess->e_tai.tac) ||
 (node->tac[i] == sess->nr_tai.tac.v)) return true;
return false;
}
static ogs_pfcp_node_t *selected_upf_node(
 ogs_pfcp_node_t *current, smf_sess_t *sess)
{
 ogs_pfcp_node_t *next, *node;
ogs_assert(current);
 ogs_assert(sess);
/* continue search from current position */
 next = ogs_list_next(current);
 for (node = next; node; node = ogs_list_next(node)) {
 if (OGS_FSM_CHECK(&node->sm, smf_pfcp_state_associated) &&
 compare_ue_info(node, sess) == true) return node;
 }
 /* cyclic search from top to current position */
 for (node = ogs_list_first(&ogs_pfcp_self()->pfcp_peer_list);
 node != next; node = ogs_list_next(node)) {
 if (OGS_FSM_CHECK(&node->sm, smf_pfcp_state_associated) &&
 compare_ue_info(node, sess) == true) return node;
 }
if (ogs_global_conf()->parameter.no_pfcp_rr_select == 0) {
 /* continue search from current position */
 next = ogs_list_next(current);
 for (node = next; node; node = ogs_list_next(node)) {
 if (OGS_FSM_CHECK(&node->sm, smf_pfcp_state_associated))
 return node;
 }
 /* cyclic search from top to current position */
 for (node = ogs_list_first(&ogs_pfcp_self()->pfcp_peer_list);
 node != next; node = ogs_list_next(node)) {
 if (OGS_FSM_CHECK(&node->sm, smf_pfcp_state_associated))
 return node;
 }
 }
ogs_error("No UPFs are PFCP associated that are suited to RR");
 return ogs_list_first(&ogs_pfcp_self()->pfcp_peer_list);
}
void smf_sess_select_upf(smf_sess_t *sess)
{
 char buf[OGS_ADDRSTRLEN];
ogs_assert(sess);
/*
 * When used for the first time, if last node is set,
 * the search is performed from the first UPF in a round-robin manner.
 */
 if (ogs_pfcp_self()->pfcp_node == NULL)
 ogs_pfcp_self()->pfcp_node =
 ogs_list_last(&ogs_pfcp_self()->pfcp_peer_list);
/* setup GTP session with selected UPF */
 ogs_pfcp_self()->pfcp_node =
 selected_upf_node(ogs_pfcp_self()->pfcp_node, sess);
 ogs_assert(ogs_pfcp_self()->pfcp_node);
 OGS_SETUP_PFCP_NODE(sess, ogs_pfcp_self()->pfcp_node);
 ogs_debug("UE using UPF on IP[%s]",
 OGS_ADDR(&ogs_pfcp_self()->pfcp_node->addr, buf));
}
smf_sess_t *smf_sess_add_by_apn(smf_ue_t *smf_ue, char *apn, uint8_t rat_type)
{
 smf_event_t e;
smf_sess_t *sess = NULL;
ogs_assert(smf_ue);
 ogs_assert(apn);
ogs_pool_id_calloc(&smf_sess_pool, &sess);
 if (!sess) {
 ogs_error("Maximum number of session[%lld] reached",
 (long long)ogs_app()->pool.sess);
 return NULL;
 }
ogs_pfcp_pool_init(&sess->pfcp);
 smf_qfi_pool_init(sess);
 smf_pf_precedence_pool_init(sess);
sess->index = ogs_pool_index(&smf_sess_pool, sess);
 ogs_assert(sess->index > 0 && sess->index <= ogs_app()->pool.sess);
/* Set TEID & SEID */
 ogs_pool_alloc(&smf_n4_seid_pool, &sess->smf_n4_seid_node);
 ogs_assert(sess->smf_n4_seid_node);
sess->smf_n4_teid = *(sess->smf_n4_seid_node);
 sess->smf_n4_seid = *(sess->smf_n4_seid_node);
ogs_hash_set(self.smf_n4_seid_hash, &sess->smf_n4_seid,
 sizeof(sess->smf_n4_seid), sess);
/* Set Charging ID */
 sess->charging.id = sess->index;
/* Create BAR in PFCP Session */
 ogs_pfcp_bar_new(&sess->pfcp);
/* Set APN */
 sess->session.name = ogs_strdup(apn);
 ogs_assert(sess->session.name);
/* Set RAT-Type */
 sess->gtp_rat_type = rat_type;
 ogs_assert(sess->gtp_rat_type);
/* Set EPC */
 sess->epc = true;
memset(&e, 0, sizeof(e));
 e.sess_id = sess->id;
 ogs_fsm_init(&sess->sm, smf_gsm_state_initial, smf_gsm_state_final, &e);
sess->smf_ue_id = smf_ue->id;
ogs_list_add(&smf_ue->sess_list, sess);
stats_add_smf_session();
return sess;
}
smf_sess_t *smf_sess_add_by_gtp1_message(ogs_gtp1_message_t *message)
{
 smf_ue_t *smf_ue = NULL;
 smf_sess_t *sess = NULL;
 char apn[OGS_MAX_APN_LEN+1];
ogs_gtp1_create_pdp_context_request_t *req = &message->create_pdp_context_request;
if (req->imsi.presence == 0) {
 ogs_error("No IMSI");
 return NULL;
 }
 if (req->tunnel_endpoint_identifier_data_i.presence == 0) {
 ogs_error("No Tunnel Endpoint Identifier Data I");
 return NULL;
 }
 if (req->nsapi.presence == 0) {
 ogs_error("No NSAPI");
 return NULL;
 }
 if (req->access_point_name.presence == 0) {
 ogs_error("No APN");
 return NULL;
 } else {
 if (ogs_fqdn_parse(apn, req->access_point_name.data,
 ogs_min(req->access_point_name.len, OGS_MAX_APN_LEN)) <= 0) {
 ogs_error("Invalid APN");
 return NULL;
 }
 }
if (req->sgsn_address_for_signalling.presence == 0) {
 ogs_error("No SGSN Address for signalling");
 return NULL;
 }
 if (req->sgsn_address_for_user_traffic.presence == 0) {
 ogs_error("No SGSN Address for user traffic");
 return NULL;
 }
 if (req->quality_of_service_profile.presence == 0) {
 ogs_error("No QoS Profile");
 return NULL;
 }
 if (req->rat_type.presence == 0) {
 ogs_error("No RAT Type");
 return NULL;
 }
ogs_trace("smf_sess_add_by_message() [APN:%s]", apn);
/*
 * 7.3.1 in 3GPP TS 29.060 Release 16
 *
 * If a new Create PDP Context Request is incoming on TEID 0 for an already
 * active PDP context, this Create PDP Context Request must be considered
 * related to a new session. The existing PDP context shall be torn down
 * locally, and the associated PDP contexts deleted locally, before the new
 * session is created.
 */
smf_ue = smf_ue_find_by_imsi(req->imsi.data, req->imsi.len);
 if (!smf_ue) {
 smf_ue = smf_ue_add_by_imsi(req->imsi.data, req->imsi.len);
 if (!smf_ue)
 return NULL;
 }
sess = smf_sess_find_by_apn(smf_ue, apn, req->rat_type.u8);
 if (sess) {
 ogs_warn("OLD Session Will Release [IMSI:%s,APN:%s]",
 smf_ue->imsi_bcd, sess->session.name);
 smf_sess_remove(sess);
 }
sess = smf_sess_add_by_apn(smf_ue, apn, req->rat_type.u8);
 sess->gtp.version = 1;
 smf_metrics_inst_global_inc(SMF_METR_GLOB_GAUGE_GTP1_PDPCTXS_ACTIVE);
 return sess;
}
smf_sess_t *smf_sess_add_by_gtp2_message(ogs_gtp2_message_t *message)
{
 smf_ue_t *smf_ue = NULL;
 smf_sess_t *sess = NULL;
 char apn[OGS_MAX_APN_LEN+1];
ogs_gtp2_create_session_request_t *req = &message->create_session_request;
if (req->imsi.presence == 0) {
 ogs_error("No IMSI");
 return NULL;
 }
 if (req->access_point_name.presence == 0) {
 ogs_error("No APN");
 return NULL;
 } else {
 if (ogs_fqdn_parse(apn, req->access_point_name.data,
 ogs_min(req->access_point_name.len, OGS_MAX_APN_LEN)) <= 0) {
 ogs_error("Invalid APN");
 return NULL;
 }
 }
 if (req->rat_type.presence == 0) {
 ogs_error("No RAT Type");
 return NULL;
 }
ogs_trace("smf_sess_add_by_message() [APN:%s]", apn);
/*
 * 7.2.1 in 3GPP TS 29.274 Release 15
 *
 * If the new Create Session Request received by the SMF collides with
 * an existing PDN connection context (the existing PDN connection context
 * is identified with the triplet [IMSI, EPS Bearer ID, Interface type],
 * where applicable Interface type here is S2a TWAN GTP-C interface or
 * S2b ePDG GTP-C interface or S5/S8 SGW GTP-C interface, and where IMSI
 * shall be replaced by TAC and SNR part of ME Identity for emergency
 * attached UE without UICC or authenticated IMSI), this Create Session
 * Request shall be treated as a request for a new session. Before creating
 * the new session, the SMF should delete:
 *
 * - the existing PDN connection context, if the Create Session Request
 * collides with the default bearer of an existing PDN connection context;
 * - the existing dedicated bearer context, if the Create Session Request
 * collides with a dedicated bearer of an existing PDN connection context.
 */
smf_ue = smf_ue_find_by_imsi(req->imsi.data, req->imsi.len);
 if (!smf_ue) {
 smf_ue = smf_ue_add_by_imsi(req->imsi.data, req->imsi.len);
 if (!smf_ue)
 return NULL;
 }
sess = smf_sess_find_by_apn(smf_ue, apn, req->rat_type.u8);
 if (sess) {
 ogs_info("OLD Session Will Release [IMSI:%s,APN:%s]",
 smf_ue->imsi_bcd, sess->session.name);
 smf_sess_remove(sess);
 }
sess = smf_sess_add_by_apn(smf_ue, apn, req->rat_type.u8);
 sess->gtp.version = 2;
 smf_metrics_inst_global_inc(SMF_METR_GLOB_GAUGE_GTP2_SESSIONS_ACTIVE);
 return sess;
}
smf_sess_t *smf_sess_add_by_psi(smf_ue_t *smf_ue, uint8_t psi)
{
 smf_event_t e;
smf_sess_t *sess = NULL;
ogs_assert(smf_ue);
 ogs_assert(psi != OGS_NAS_PDU_SESSION_IDENTITY_UNASSIGNED);
ogs_pool_id_calloc(&smf_sess_pool, &sess);
 if (!sess) {
 ogs_error("Maximum number of session[%lld] reached",
 (long long)ogs_app()->pool.sess);
 return NULL;
 }
/* SBI Features */
 OGS_SBI_FEATURES_SET(sess->smpolicycontrol_features,
 OGS_SBI_NPCF_SMPOLICYCONTROL_DN_AUTHORIZATION);
ogs_pfcp_pool_init(&sess->pfcp);
 smf_qfi_pool_init(sess);
 smf_pf_precedence_pool_init(sess);
sess->index = ogs_pool_index(&smf_sess_pool, sess);
 ogs_assert(sess->index > 0 && sess->index <= ogs_app()->pool.sess);
/* Set TEID & SEID */
 ogs_pool_alloc(&smf_n4_seid_pool, &sess->smf_n4_seid_node);
 ogs_assert(sess->smf_n4_seid_node);
sess->smf_n4_teid = *(sess->smf_n4_seid_node);
 sess->smf_n4_seid = *(sess->smf_n4_seid_node);
ogs_hash_set(self.smf_n4_seid_hash, &sess->smf_n4_seid,
 sizeof(sess->smf_n4_seid), sess);
/* Set SmContextRef in 5GC */
 sess->sm_context_ref = ogs_msprintf("%d", sess->index);
 ogs_assert(sess->sm_context_ref);
/* Create BAR in PFCP Session */
 ogs_pfcp_bar_new(&sess->pfcp);
/* Set PSI */
 sess->psi = psi;
/* Set S-NSSAI */
 sess->s_nssai.sst = 0;
 sess->s_nssai.sd.v = OGS_S_NSSAI_NO_SD_VALUE;
 sess->mapped_hplmn.sst = 0;
 sess->mapped_hplmn.sd.v = OGS_S_NSSAI_NO_SD_VALUE;
/* Set Charging Id */
 sess->charging.id = sess->index;
memset(&e, 0, sizeof(e));
 e.sess_id = sess->id;
 ogs_fsm_init(&sess->sm, smf_gsm_state_initial, smf_gsm_state_final, &e);
sess->smf_ue_id = smf_ue->id;
ogs_list_add(&smf_ue->sess_list, sess);
stats_add_smf_session();
return sess;
}
smf_sess_t *smf_sess_add_by_sbi_message(ogs_sbi_message_t *message)
{
 smf_ue_t *smf_ue = NULL;
 smf_sess_t *sess = NULL;
OpenAPI_sm_context_create_data_t *SmContextCreateData = NULL;
ogs_assert(message);
 SmContextCreateData = message->SmContextCreateData;
 if (!SmContextCreateData) {
 ogs_error("No SmContextCreateData");
 return NULL;
 }
if (!SmContextCreateData->supi) {
 ogs_error("No SUPI");
 return NULL;
 }
if (SmContextCreateData->is_pdu_session_id == false) {
 ogs_error("PDU session identitiy is unassigned");
 return NULL;
 }
smf_ue = smf_ue_find_by_supi(SmContextCreateData->supi);
 if (!smf_ue) {
 smf_ue = smf_ue_add_by_supi(SmContextCreateData->supi);
 if (!smf_ue) {
 ogs_error("smf_ue_add_by_supi() failed");
 return NULL;
 }
 }
sess = smf_sess_find_by_psi(smf_ue, SmContextCreateData->pdu_session_id);
 if (sess) {
 ogs_warn("OLD Session Will Release [SUPI:%s,PDU Session identity:%d]",
 SmContextCreateData->supi, SmContextCreateData->pdu_session_id);
 smf_metrics_inst_by_slice_add(&sess->serving_plmn_id, &sess->s_nssai,
 SMF_METR_GAUGE_SM_SESSIONNBR, -1);
 smf_sess_remove(sess);
 }
sess = smf_sess_add_by_psi(smf_ue, SmContextCreateData->pdu_session_id);
return sess;
}
uint8_t smf_sess_set_ue_ip(smf_sess_t *sess)
{
 ogs_pfcp_subnet_t *subnet6 = NULL;
 smf_ue_t *smf_ue = NULL;
uint8_t cause_value = OGS_PFCP_CAUSE_REQUEST_ACCEPTED;
ogs_assert(sess);
 smf_ue = smf_ue_find_by_id(sess->smf_ue_id);
 ogs_assert(smf_ue);
if (sess->session.session_type == OGS_PDU_SESSION_TYPE_IPV4V6) {
/*
 * This is the case when the HSS is set to IPv4v6 and
 * the UE requests IPv4v6.
 *
 * At this time, it was changed to operate normally
 * even when SMF has no IPv4 or IPv6 subnet.
 *
 * If there is no IPv6 subnet, only IPv4 IP address is assigned.
 * If there is no IPv4 subnet, only IPv6 IP address is assigned.
 * If there are IPv4/IPv6 subnet, IPv4/IPv6 IP address are assigned.
 */
ogs_pfcp_subnet_t *subnet = NULL;
 ogs_pfcp_subnet_t *subnet6 = NULL;
ogs_assert(sess->session.name);
 subnet = ogs_pfcp_find_subnet_by_dnn(AF_INET, sess->session.name);
 subnet6 = ogs_pfcp_find_subnet_by_dnn(AF_INET6, sess->session.name);
if (subnet != NULL && subnet6 == NULL) {
 sess->session.session_type = OGS_PDU_SESSION_TYPE_IPV4;
 ogs_error("[%s] No IPv6 subnet or set to /63 or /64, "
 "only IPv4 assigned", sess->session.name);
 } else if (subnet == NULL && subnet6 != NULL) {
 sess->session.session_type = OGS_PDU_SESSION_TYPE_IPV6;
 ogs_error("[%s] No IPv4 subnet or set to /31 or /32, "
 "only IPv6 assigned", sess->session.name);
 }
 }
sess->paa.session_type = sess->session.session_type;
 ogs_assert(sess->session.session_type);
if (sess->ipv4) {
 ogs_hash_set(smf_self()->ipv4_hash,
 sess->ipv4->addr, OGS_IPV4_LEN, NULL);
 ogs_pfcp_ue_ip_free(sess->ipv4);
 }
 if (sess->ipv6) {
 ogs_hash_set(smf_self()->ipv6_hash,
 sess->ipv6->addr, OGS_IPV6_DEFAULT_PREFIX_LEN >> 3, NULL);
 ogs_pfcp_ue_ip_free(sess->ipv6);
 }
if (sess->session.session_type == OGS_PDU_SESSION_TYPE_IPV4) {
 sess->ipv4 = ogs_pfcp_ue_ip_alloc(&cause_value, AF_INET,
 sess->session.name, (uint8_t *)&sess->session.ue_ip.addr);
 if (!sess->ipv4) {
 ogs_error("ogs_pfcp_ue_ip_alloc() failed[%d]", cause_value);
 return cause_value;
 }
 sess->paa.addr = sess->ipv4->addr[0];
 ogs_hash_set(smf_self()->ipv4_hash,
 sess->ipv4->addr, OGS_IPV4_LEN, sess);
 } else if (sess->session.session_type == OGS_PDU_SESSION_TYPE_IPV6) {
 sess->ipv6 = ogs_pfcp_ue_ip_alloc(&cause_value, AF_INET6,
 sess->session.name, sess->session.ue_ip.addr6);
 if (!sess->ipv6) {
 ogs_error("ogs_pfcp_ue_ip_alloc() failed[%d]", cause_value);
 return cause_value;
 }
subnet6 = sess->ipv6->subnet;
 ogs_assert(subnet6);
sess->paa.len = OGS_IPV6_DEFAULT_PREFIX_LEN >> 3;
 memcpy(sess->paa.addr6, sess->ipv6->addr, OGS_IPV6_LEN);
 ogs_hash_set(smf_self()->ipv6_hash,
 sess->ipv6->addr, OGS_IPV6_DEFAULT_PREFIX_LEN >> 3, sess);
 } else if (sess->session.session_type == OGS_PDU_SESSION_TYPE_IPV4V6) {
 sess->ipv4 = ogs_pfcp_ue_ip_alloc(&cause_value, AF_INET,
 sess->session.name, (uint8_t *)&sess->session.ue_ip.addr);
 if (!sess->ipv4) {
 ogs_error("ogs_pfcp_ue_ip_alloc() failed[%d]", cause_value);
 return cause_value;
 }
 sess->ipv6 = ogs_pfcp_ue_ip_alloc(&cause_value, AF_INET6,
 sess->session.name, sess->session.ue_ip.addr6);
 if (!sess->ipv6) {
 ogs_error("ogs_pfcp_ue_ip_alloc() failed[%d]", cause_value);
 ogs_assert(cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED);
 if (sess->ipv4) {
 ogs_hash_set(smf_self()->ipv4_hash,
 sess->ipv4->addr, OGS_IPV4_LEN, NULL);
 ogs_pfcp_ue_ip_free(sess->ipv4);
 sess->ipv4 = NULL;
 }
 return cause_value;
 }
subnet6 = sess->ipv6->subnet;
 ogs_assert(subnet6);
sess->paa.both.addr = sess->ipv4->addr[0];
 sess->paa.both.len = OGS_IPV6_DEFAULT_PREFIX_LEN >> 3;
 memcpy(sess->paa.both.addr6, sess->ipv6->addr, OGS_IPV6_LEN);
 ogs_hash_set(smf_self()->ipv4_hash,
 sess->ipv4->addr, OGS_IPV4_LEN, sess);
 ogs_hash_set(smf_self()->ipv6_hash,
 sess->ipv6->addr, OGS_IPV6_DEFAULT_PREFIX_LEN >> 3, sess);
 } else {
 ogs_fatal("Invalid sess->session.session_type[%d]",
 sess->session.session_type);
 ogs_assert_if_reached();
 }
return cause_value;
}
void smf_sess_set_paging_n1n2message_location(
 smf_sess_t *sess, char *n1n2message_location)
{
 ogs_assert(sess);
 ogs_assert(n1n2message_location);
if (sess->paging.n1n2message_location) {
 ogs_hash_set(self.n1n2message_hash,
 sess->paging.n1n2message_location,
 strlen(sess->paging.n1n2message_location),
 NULL);
 ogs_free(sess->paging.n1n2message_location);
 }
sess->paging.n1n2message_location = ogs_strdup(n1n2message_location);
 ogs_assert(sess->paging.n1n2message_location);
ogs_hash_set(self.n1n2message_hash,
 sess->paging.n1n2message_location,
 strlen(sess->paging.n1n2message_location),
 sess);
}
void smf_sess_remove(smf_sess_t *sess)
{
 int i;
 smf_ue_t *smf_ue = NULL;
 smf_event_t e;
char buf1[OGS_ADDRSTRLEN];
 char buf2[OGS_ADDRSTRLEN];
ogs_assert(sess);
 smf_ue = smf_ue_find_by_id(sess->smf_ue_id);
 ogs_assert(smf_ue);
ogs_info("Removed Session: UE IMSI:[%s] DNN:[%s:%d] IPv4:[%s] IPv6:[%s]",
 smf_ue->supi ? smf_ue->supi : smf_ue->imsi_bcd,
 sess->session.name, sess->psi,
 sess->ipv4 ? OGS_INET_NTOP(&sess->ipv4->addr, buf1) : "",
 sess->ipv6 ? OGS_INET6_NTOP(&sess->ipv6->addr, buf2) : "");
ogs_list_remove(&smf_ue->sess_list, sess);
memset(&e, 0, sizeof(e));
 e.sess_id = sess->id;
 ogs_fsm_fini(&sess->sm, &e);
OGS_TLV_CLEAR_DATA(&sess->gtp.ue_pco);
 OGS_TLV_CLEAR_DATA(&sess->gtp.ue_apco);
 OGS_TLV_CLEAR_DATA(&sess->gtp.ue_epco);
 OGS_TLV_CLEAR_DATA(&sess->gtp.user_location_information);
 OGS_TLV_CLEAR_DATA(&sess->gtp.ue_timezone);
 OGS_TLV_CLEAR_DATA(&sess->gtp.charging_characteristics);
 OGS_TLV_CLEAR_DATA(&sess->gtp.v1.qos);
OGS_NAS_CLEAR_DATA(&sess->nas.ue_epco);
for (i = 0; i < sess->policy.num_of_pcc_rule; i++)
 OGS_PCC_RULE_FREE(&sess->policy.pcc_rule[i]);
 sess->policy.num_of_pcc_rule = 0;
ogs_hash_set(self.smf_n4_seid_hash, &sess->smf_n4_seid,
 sizeof(sess->smf_n4_seid), NULL);
if (sess->ipv4) {
 ogs_hash_set(self.ipv4_hash, sess->ipv4->addr, OGS_IPV4_LEN, NULL);
 ogs_pfcp_ue_ip_free(sess->ipv4);
 }
 if (sess->ipv6) {
 ogs_hash_set(self.ipv6_hash,
 sess->ipv6->addr, OGS_IPV6_DEFAULT_PREFIX_LEN >> 3, NULL);
 ogs_pfcp_ue_ip_free(sess->ipv6);
 }
if (sess->paging.n1n2message_location) {
 ogs_hash_set(self.n1n2message_hash,
 sess->paging.n1n2message_location,
 strlen(sess->paging.n1n2message_location),
 NULL);
 ogs_free(sess->paging.n1n2message_location);
 }
if (sess->sm_context_ref)
 ogs_free(sess->sm_context_ref);
if (sess->sm_context_status_uri)
 ogs_free(sess->sm_context_status_uri);
 if (sess->namf.client)
 ogs_sbi_client_remove(sess->namf.client);
PCF_SM_POLICY_CLEAR(sess);
 if (sess->policy_association.client)
 ogs_sbi_client_remove(sess->policy_association.client);
if (sess->session.name)
 ogs_free(sess->session.name);
 if (sess->full_dnn)
 ogs_free(sess->full_dnn);
if (sess->session.ipv4_framed_routes) {
 for (i = 0; i < OGS_MAX_NUM_OF_FRAMED_ROUTES_IN_PDI; i++) {
 if (!sess->session.ipv4_framed_routes[i])
 break;
 ogs_free(sess->session.ipv4_framed_routes[i]);
 }
 ogs_free(sess->session.ipv4_framed_routes);
 }
 if (sess->session.ipv6_framed_routes) {
 for (i = 0; i < OGS_MAX_NUM_OF_FRAMED_ROUTES_IN_PDI; i++) {
 if (!sess->session.ipv6_framed_routes[i])
 break;
 ogs_free(sess->session.ipv6_framed_routes[i]);
 }
 ogs_free(sess->session.ipv6_framed_routes);
 }
if (sess->upf_n3_addr)
 ogs_freeaddrinfo(sess->upf_n3_addr);
 if (sess->upf_n3_addr6)
 ogs_freeaddrinfo(sess->upf_n3_addr6);
if (sess->handover.upf_dl_addr)
 ogs_freeaddrinfo(sess->handover.upf_dl_addr);
 if (sess->handover.upf_dl_addr6)
 ogs_freeaddrinfo(sess->handover.upf_dl_addr6);
if (sess->pcf_id)
 ogs_free(sess->pcf_id);
 if (sess->serving_nf_id)
 ogs_free(sess->serving_nf_id);
/* Free SBI object memory */
 ogs_sbi_object_free(&sess->sbi);
smf_bearer_remove_all(sess);
ogs_assert(sess->pfcp.bar);
 ogs_pfcp_bar_delete(sess->pfcp.bar);
smf_sess_delete_cp_up_data_forwarding(sess);
ogs_pfcp_pool_final(&sess->pfcp);
 smf_qfi_pool_final(sess);
 smf_pf_precedence_pool_final(sess);
switch (sess->gtp.version) {
 case 1:
 smf_metrics_inst_global_dec(SMF_METR_GLOB_GAUGE_GTP1_PDPCTXS_ACTIVE);
 break;
 case 2:
 smf_metrics_inst_global_dec(SMF_METR_GLOB_GAUGE_GTP2_SESSIONS_ACTIVE);
 break;
 }
 stats_remove_smf_session(sess);
ogs_pool_free(&smf_n4_seid_pool, sess->smf_n4_seid_node);
 ogs_pool_id_free(&smf_sess_pool, sess);
}
void smf_sess_remove_all(smf_ue_t *smf_ue)
{
 smf_sess_t *sess = NULL, *next = NULL;;
ogs_assert(smf_ue);
ogs_list_for_each_safe(&smf_ue->sess_list, next, sess)
 smf_sess_remove(sess);
}
smf_sess_t *smf_sess_find_by_teid(uint32_t teid)
{
 return smf_sess_find_by_seid(teid);
}
smf_sess_t *smf_sess_find_by_seid(uint64_t seid)
{
 return ogs_hash_get(self.smf_n4_seid_hash, &seid, sizeof(seid));
}
smf_sess_t *smf_sess_find_by_apn(smf_ue_t *smf_ue, char *apn, uint8_t rat_type)
{
 smf_sess_t *sess = NULL;
ogs_assert(smf_ue);
 ogs_assert(apn);
ogs_list_reverse_for_each(&smf_ue->sess_list, sess) {
 if (ogs_strcasecmp(sess->session.name, apn) == 0 &&
 sess->gtp_rat_type == rat_type)
 return sess;
 }
return NULL;
}
smf_sess_t *smf_sess_find_by_psi(smf_ue_t *smf_ue, uint8_t psi)
{
 smf_sess_t *sess = NULL;
ogs_assert(smf_ue);
 ogs_assert(psi != OGS_NAS_PDU_SESSION_IDENTITY_UNASSIGNED);
ogs_list_reverse_for_each(&smf_ue->sess_list, sess) {
 if (sess->psi == psi)
 return sess;
 }
return NULL;
}
smf_sess_t *smf_sess_find(uint32_t index)
{
 return ogs_pool_find(&smf_sess_pool, index);
}
smf_sess_t *smf_sess_find_by_charging_id(uint32_t charging_id)
{
 ogs_assert(charging_id);
 return smf_sess_find(charging_id);
}
smf_sess_t *smf_sess_find_by_sm_context_ref(char *sm_context_ref)
{
 ogs_assert(sm_context_ref);
 return smf_sess_find(atoll(sm_context_ref));
}
smf_sess_t *smf_sess_find_by_ipv4(uint32_t addr)
{
 ogs_assert(self.ipv4_hash);
 return (smf_sess_t *)ogs_hash_get(self.ipv4_hash, &addr, OGS_IPV4_LEN);
}
smf_sess_t *smf_sess_find_by_ipv6(uint32_t *addr6)
{
 ogs_assert(self.ipv6_hash);
 ogs_assert(addr6);
 return (smf_sess_t *)ogs_hash_get(
 self.ipv6_hash, addr6, OGS_IPV6_DEFAULT_PREFIX_LEN >> 3);
}
smf_sess_t *smf_sess_find_by_paging_n1n2message_location(
 char *n1n2message_location)
{
 ogs_assert(self.n1n2message_hash);
 ogs_assert(n1n2message_location);
 return (smf_sess_t *)ogs_hash_get(self.n1n2message_hash,
 n1n2message_location, strlen(n1n2message_location));
}
ogs_pcc_rule_t *smf_pcc_rule_find_by_id(smf_sess_t *sess, char *pcc_rule_id)
{
 int i;
ogs_assert(sess);
 ogs_assert(pcc_rule_id);
for (i = 0; i < sess->policy.num_of_pcc_rule; i++) {
 ogs_pcc_rule_t *pcc_rule = &sess->policy.pcc_rule[i];
 if (pcc_rule->id && strcmp(pcc_rule->id, pcc_rule_id) == 0) {
 return pcc_rule;
 }
 }
return NULL;
}
smf_bearer_t *smf_qos_flow_add(smf_sess_t *sess)
{
 smf_bearer_t *qos_flow = NULL;
ogs_pfcp_pdr_t *dl_pdr = NULL;
 ogs_pfcp_pdr_t *ul_pdr = NULL;
 ogs_pfcp_far_t *dl_far = NULL;
 ogs_pfcp_far_t *ul_far = NULL;
 ogs_pfcp_urr_t *urr = NULL;
 ogs_pfcp_qer_t *qer = NULL;
ogs_assert(sess);
ogs_pool_id_calloc(&smf_bearer_pool, &qos_flow);
 ogs_assert(qos_flow);
smf_pf_identifier_pool_init(qos_flow);
ogs_list_init(&qos_flow->pf_list);
/* PDR */
 dl_pdr = ogs_pfcp_pdr_add(&sess->pfcp);
 ogs_assert(dl_pdr);
 qos_flow->dl_pdr = dl_pdr;
ogs_assert(sess->session.name);
 dl_pdr->apn = ogs_strdup(sess->session.name);
 ogs_assert(dl_pdr->apn);
dl_pdr->src_if = OGS_PFCP_INTERFACE_CORE;
ul_pdr = ogs_pfcp_pdr_add(&sess->pfcp);
 ogs_assert(ul_pdr);
 qos_flow->ul_pdr = ul_pdr;
ogs_assert(sess->session.name);
 ul_pdr->apn = ogs_strdup(sess->session.name);
 ogs_assert(ul_pdr->apn);
ul_pdr->src_if = OGS_PFCP_INTERFACE_ACCESS;
ul_pdr->outer_header_removal_len = 2;
 if (sess->session.session_type == OGS_PDU_SESSION_TYPE_IPV4) {
 ul_pdr->outer_header_removal.description =
 OGS_PFCP_OUTER_HEADER_REMOVAL_GTPU_UDP_IPV4;
 } else if (sess->session.session_type == OGS_PDU_SESSION_TYPE_IPV6) {
 ul_pdr->outer_header_removal.description =
 OGS_PFCP_OUTER_HEADER_REMOVAL_GTPU_UDP_IPV6;
 } else if (sess->session.session_type == OGS_PDU_SESSION_TYPE_IPV4V6) {
 ul_pdr->outer_header_removal.description =
 OGS_PFCP_OUTER_HEADER_REMOVAL_GTPU_UDP_IP;
 } else
 ogs_assert_if_reached();
 ul_pdr->outer_header_removal.gtpu_extheader_deletion =
 OGS_PFCP_PDU_SESSION_CONTAINER_TO_BE_DELETED;
/* FAR */
 dl_far = ogs_pfcp_far_add(&sess->pfcp);
 ogs_assert(dl_far);
 qos_flow->dl_far = dl_far;
ogs_assert(sess->session.name);
 dl_far->apn = ogs_strdup(sess->session.name);
 ogs_assert(dl_far->apn);
dl_far->dst_if = OGS_PFCP_INTERFACE_ACCESS;
 ogs_pfcp_pdr_associate_far(dl_pdr, dl_far);
dl_far->apply_action =
 OGS_PFCP_APPLY_ACTION_BUFF| OGS_PFCP_APPLY_ACTION_NOCP;
 ogs_assert(sess->pfcp.bar);
ul_far = ogs_pfcp_far_add(&sess->pfcp);
 ogs_assert(ul_far);
 qos_flow->ul_far = ul_far;
ogs_assert(sess->session.name);
 ul_far->apn = ogs_strdup(sess->session.name);
 ogs_assert(ul_far->apn);
ul_far->dst_if = OGS_PFCP_INTERFACE_CORE;
 ogs_pfcp_pdr_associate_far(ul_pdr, ul_far);
ul_far->apply_action = OGS_PFCP_APPLY_ACTION_FORW;
/* URR */
 urr = ogs_pfcp_urr_add(&sess->pfcp);
 ogs_assert(urr);
 qos_flow->urr = urr;
urr->meas_method = OGS_PFCP_MEASUREMENT_METHOD_VOLUME;
 urr->rep_triggers.volume_threshold = 1;
 urr->vol_threshold.tovol = 1;
 urr->vol_threshold.total_volume = 1024*1024*100;
ogs_pfcp_pdr_associate_urr(dl_pdr, urr);
/* QER */
 qer = ogs_pfcp_qer_add(&sess->pfcp);
 ogs_assert(qer);
 qos_flow->qer = qer;
ogs_pfcp_pdr_associate_qer(dl_pdr, qer);
 ogs_pfcp_pdr_associate_qer(ul_pdr, qer);
/* Allocate QFI */
 ogs_pool_alloc(&sess->qfi_pool, &qos_flow->qfi_node);
 ogs_assert(qos_flow->qfi_node);
qos_flow->qfi = ul_pdr->qfi = qer->qfi = *(qos_flow->qfi_node);
qos_flow->sess_id = sess->id;
ogs_list_add(&sess->bearer_list, qos_flow);
 smf_metrics_inst_by_5qi_add(&sess->serving_plmn_id, &sess->s_nssai,
 sess->session.qos.index, SMF_METR_GAUGE_SM_QOSFLOWNBR, 1);
 smf_metrics_inst_global_inc(SMF_METR_GLOB_GAUGE_BEARERS_ACTIVE);
return qos_flow;
}
void smf_sess_create_indirect_data_forwarding(smf_sess_t *sess)
{
 smf_bearer_t *qos_flow = NULL;
ogs_assert(sess);
ogs_list_for_each(&sess->bearer_list, qos_flow) {
 ogs_pfcp_pdr_t *pdr = NULL;
 ogs_pfcp_far_t *far = NULL;
 ogs_pfcp_qer_t *qer = NULL;
ogs_assert(sess);
pdr = ogs_pfcp_pdr_add(&sess->pfcp);
 ogs_assert(pdr);
ogs_assert(sess->session.name);
 pdr->apn = ogs_strdup(sess->session.name);
 ogs_assert(pdr->apn);
pdr->src_if = OGS_PFCP_INTERFACE_ACCESS;
pdr->outer_header_removal_len = 1;
 if (sess->session.session_type == OGS_PDU_SESSION_TYPE_IPV4) {
 pdr->outer_header_removal.description =
 OGS_PFCP_OUTER_HEADER_REMOVAL_GTPU_UDP_IPV4;
 } else if (sess->session.session_type == OGS_PDU_SESSION_TYPE_IPV6) {
 pdr->outer_header_removal.description =
 OGS_PFCP_OUTER_HEADER_REMOVAL_GTPU_UDP_IPV6;
 } else if (sess->session.session_type == OGS_PDU_SESSION_TYPE_IPV4V6) {
 pdr->outer_header_removal.description =
 OGS_PFCP_OUTER_HEADER_REMOVAL_GTPU_UDP_IP;
 } else
 ogs_assert_if_reached();
far = ogs_pfcp_far_add(&sess->pfcp);
 ogs_assert(far);
ogs_assert(sess->session.name);
 far->apn = ogs_strdup(sess->session.name);
 ogs_assert(far->apn);
far->dst_if = OGS_PFCP_INTERFACE_ACCESS;
 ogs_pfcp_pdr_associate_far(pdr, far);
far->apply_action = OGS_PFCP_APPLY_ACTION_FORW;
qer = qos_flow->qer;
 ogs_assert(qer);
ogs_pfcp_pdr_associate_qer(pdr, qer);
pdr->qfi = qos_flow->qfi;
ogs_assert(sess->pfcp_node);
 if (sess->pfcp_node->up_function_features.ftup) {
/* TS 129 244 V16.5.0 8.2.3
 *
 * At least one of the V4 and V6 flags shall be set to "1",
 * and both may be set to "1" for both scenarios:
 *
 * - when the CP function is providing F-TEID, i.e.
 * both IPv4 address field and IPv6 address field may be present;
 * or
 * - when the UP function is requested to allocate the F-TEID,
 * i.e. when CHOOSE bit is set to "1",
 * and the IPv4 address and IPv6 address fields are not present.
 */
pdr->f_teid.ipv4 = 1;
 pdr->f_teid.ipv6 = 1;
 pdr->f_teid.ch = 1;
 pdr->f_teid.chid = 1;
 pdr->f_teid.choose_id = OGS_PFCP_INDIRECT_DATA_FORWARDING_CHOOSE_ID;
 pdr->f_teid_len = 2;
 } else {
 /*
 * CHOOSE_ID is set in INDIRECT so that all PDRs must be set
 * to the same TEID.
 *
 * If sess->handover.upf_dl_teid is set in the PDR of
 * the first QoS flow, the PDRs of the remaining QoS flows use
 * the same TEID.
 */
 if (ogs_list_first(&sess->bearer_list) == qos_flow) {
 ogs_gtpu_resource_t *resource = NULL;
if (sess->handover.upf_dl_addr)
 ogs_freeaddrinfo(sess->handover.upf_dl_addr);
 if (sess->handover.upf_dl_addr6)
 ogs_freeaddrinfo(sess->handover.upf_dl_addr6);
resource = ogs_pfcp_find_gtpu_resource(
 &sess->pfcp_node->gtpu_resource_list,
 sess->session.name, pdr->src_if);
if (resource) {
 ogs_user_plane_ip_resource_info_to_sockaddr(&resource->info,
 &sess->handover.upf_dl_addr,
 &sess->handover.upf_dl_addr6);
 if (resource->info.teidri)
 sess->handover.upf_dl_teid =
 OGS_PFCP_GTPU_INDEX_TO_TEID(
 pdr->teid, resource->info.teidri,
 resource->info.teid_range);
 else
 sess->handover.upf_dl_teid = pdr->teid;
 } else {
 if (sess->pfcp_node->addr.ogs_sa_family == AF_INET)
 ogs_assert(OGS_OK == ogs_copyaddrinfo(
 &sess->handover.upf_dl_addr,
 &sess->pfcp_node->addr));
 else if (sess->pfcp_node->addr.ogs_sa_family == AF_INET6)
 ogs_assert(OGS_OK == ogs_copyaddrinfo(
 &sess->handover.upf_dl_addr6,
 &sess->pfcp_node->addr));
 else
 ogs_assert_if_reached();
sess->handover.upf_dl_teid = pdr->teid;
 }
 }
ogs_assert(OGS_OK ==
 ogs_pfcp_sockaddr_to_f_teid(
 sess->handover.upf_dl_addr, sess->handover.upf_dl_addr6,
 &pdr->f_teid, &pdr->f_teid_len));
 pdr->f_teid.teid = sess->handover.upf_dl_teid;
 }
ogs_assert(OGS_OK ==
 ogs_pfcp_ip_to_outer_header_creation(
 &sess->handover.gnb_dl_ip,
 &far->outer_header_creation,
 &far->outer_header_creation_len));
 far->outer_header_creation.teid = sess->handover.gnb_dl_teid;
/* Indirect Data Forwarding PDRs is set to highest precedence
 * (lowest precedence value) */
 pdr->precedence = OGS_PFCP_INDIRECT_PDR_PRECEDENCE;
 }
}
bool smf_sess_have_indirect_data_forwarding(smf_sess_t *sess)
{
 ogs_pfcp_pdr_t *pdr = NULL;
ogs_assert(sess);
ogs_list_for_each(&sess->pfcp.pdr_list, pdr) {
 ogs_pfcp_far_t *far = pdr->far;
ogs_assert(far);
if ((pdr->src_if == OGS_PFCP_INTERFACE_ACCESS) &&
 (far->dst_if == OGS_PFCP_INTERFACE_ACCESS)) {
 return true;
 }
 }
return false;
}
void smf_sess_delete_indirect_data_forwarding(smf_sess_t *sess)
{
 ogs_pfcp_pdr_t *pdr = NULL;
ogs_assert(sess);
ogs_list_for_each(&sess->pfcp.pdr_list, pdr) {
 ogs_pfcp_far_t *far = pdr->far;
ogs_assert(far);
if ((pdr->src_if == OGS_PFCP_INTERFACE_ACCESS) &&
 (far->dst_if == OGS_PFCP_INTERFACE_ACCESS)) {
 ogs_pfcp_pdr_remove(pdr);
 ogs_pfcp_far_remove(far);
 }
 }
}
void smf_sess_create_cp_up_data_forwarding(smf_sess_t *sess)
{
 smf_bearer_t *qos_flow = NULL;
ogs_pfcp_pdr_t *cp2up_pdr = NULL;
 ogs_pfcp_pdr_t *up2cp_pdr = NULL;
 ogs_pfcp_far_t *cp2up_far = NULL;
 ogs_pfcp_far_t *up2cp_far = NULL;
ogs_assert(sess);
smf_sess_delete_cp_up_data_forwarding(sess);
cp2up_pdr = ogs_pfcp_pdr_add(&sess->pfcp);
 ogs_assert(cp2up_pdr);
 sess->cp2up_pdr = cp2up_pdr;
ogs_assert(sess->session.name);
 cp2up_pdr->apn = ogs_strdup(sess->session.name);
 ogs_assert(cp2up_pdr->apn);
cp2up_pdr->src_if = OGS_PFCP_INTERFACE_CP_FUNCTION;
cp2up_pdr->outer_header_removal_len = 1;
 if (sess->session.session_type == OGS_PDU_SESSION_TYPE_IPV4) {
 cp2up_pdr->outer_header_removal.description =
 OGS_PFCP_OUTER_HEADER_REMOVAL_GTPU_UDP_IPV4;
 } else if (sess->session.session_type == OGS_PDU_SESSION_TYPE_IPV6) {
 cp2up_pdr->outer_header_removal.description =
 OGS_PFCP_OUTER_HEADER_REMOVAL_GTPU_UDP_IPV6;
 } else if (sess->session.session_type == OGS_PDU_SESSION_TYPE_IPV4V6) {
 cp2up_pdr->outer_header_removal.description =
 OGS_PFCP_OUTER_HEADER_REMOVAL_GTPU_UDP_IP;
 } else
 ogs_assert_if_reached();
up2cp_pdr = ogs_pfcp_pdr_add(&sess->pfcp);
 ogs_assert(up2cp_pdr);
 sess->up2cp_pdr = up2cp_pdr;
ogs_assert(sess->session.name);
 up2cp_pdr->apn = ogs_strdup(sess->session.name);
 ogs_assert(up2cp_pdr->apn);
up2cp_pdr->src_if = OGS_PFCP_INTERFACE_ACCESS;
up2cp_pdr->outer_header_removal_len = 1;
 if (sess->session.session_type == OGS_PDU_SESSION_TYPE_IPV4) {
 up2cp_pdr->outer_header_removal.description =
 OGS_PFCP_OUTER_HEADER_REMOVAL_GTPU_UDP_IPV4;
 } else if (sess->session.session_type == OGS_PDU_SESSION_TYPE_IPV6) {
 up2cp_pdr->outer_header_removal.description =
 OGS_PFCP_OUTER_HEADER_REMOVAL_GTPU_UDP_IPV6;
 } else if (sess->session.session_type == OGS_PDU_SESSION_TYPE_IPV4V6) {
 up2cp_pdr->outer_header_removal.description =
 OGS_PFCP_OUTER_HEADER_REMOVAL_GTPU_UDP_IP;
 } else
 ogs_assert_if_reached();
qos_flow = smf_default_bearer_in_sess(sess);
 ogs_assert(qos_flow);
 ogs_assert(ogs_list_next(qos_flow) == NULL);
/* We'll use the DL-FAR for CP2UP-FAR */
 cp2up_far = qos_flow->dl_far;
 ogs_assert(cp2up_far);
 ogs_pfcp_pdr_associate_far(cp2up_pdr, cp2up_far);
 sess->cp2up_far = cp2up_far;
up2cp_far = ogs_pfcp_far_add(&sess->pfcp);
 ogs_assert(up2cp_far);
 sess->up2cp_far = up2cp_far;
ogs_assert(sess->session.name);
 up2cp_far->apn = ogs_strdup(sess->session.name);
 ogs_assert(up2cp_far->apn);
up2cp_far->dst_if = OGS_PFCP_INTERFACE_CP_FUNCTION;
 ogs_pfcp_pdr_associate_far(up2cp_pdr, up2cp_far);
up2cp_far->apply_action = OGS_PFCP_APPLY_ACTION_FORW;
if (qos_flow->qer && qos_flow->qfi) {
 /* To match the PDI of UP2CP_PDR(from ff02::2/128 to assigned)
 * Router-Solicitation has QFI in the Extended Header */
 up2cp_pdr->qfi = qos_flow->qfi;
/* When UPF sends router advertisement to gNB,
 * it includes QFI in extension header */
 ogs_pfcp_pdr_associate_qer(cp2up_pdr, qos_flow->qer);
 }
}
void smf_sess_delete_cp_up_data_forwarding(smf_sess_t *sess)
{
 ogs_assert(sess);
if (sess->cp2up_pdr)
 ogs_pfcp_pdr_remove(sess->cp2up_pdr);
 if (sess->up2cp_pdr)
 ogs_pfcp_pdr_remove(sess->up2cp_pdr);
/* CP2UP-FAR == DL-FAR in Default QoS Flow
 * Should not remove CP2UP-FAR here */
 if (sess->up2cp_far)
 ogs_pfcp_far_remove(sess->up2cp_far);
}
smf_bearer_t *smf_qos_flow_find_by_qfi(smf_sess_t *sess, uint8_t qfi)
{
 smf_bearer_t *qos_flow = NULL;
ogs_assert(sess);
 ogs_list_for_each(&sess->bearer_list, qos_flow) {
 if (qos_flow->qfi == qfi)
 return qos_flow;
 }
return qos_flow;
}
smf_bearer_t *smf_qos_flow_find_by_pcc_rule_id(
 smf_sess_t *sess, char *pcc_rule_id)
{
 smf_bearer_t *qos_flow = NULL;
ogs_assert(sess);
 ogs_assert(pcc_rule_id);
ogs_list_for_each(&sess->bearer_list, qos_flow) {
 if (qos_flow->pcc_rule.id &&
 strcmp(qos_flow->pcc_rule.id, pcc_rule_id) == 0)
 return qos_flow;
 }
return NULL;
}
smf_bearer_t *smf_bearer_add(smf_sess_t *sess)
{
 smf_bearer_t *bearer = NULL;
ogs_pfcp_pdr_t *dl_pdr = NULL;
 ogs_pfcp_pdr_t *ul_pdr = NULL;
 ogs_pfcp_far_t *dl_far = NULL;
 ogs_pfcp_far_t *ul_far = NULL;
ogs_assert(sess);
ogs_pool_id_calloc(&smf_bearer_pool, &bearer);
 ogs_assert(bearer);
smf_pf_identifier_pool_init(bearer);
ogs_list_init(&bearer->pf_list);
/* PDR */
 dl_pdr = ogs_pfcp_pdr_add(&sess->pfcp);
 ogs_assert(dl_pdr);
 bearer->dl_pdr = dl_pdr;
ogs_assert(sess->session.name);
 dl_pdr->apn = ogs_strdup(sess->session.name);
 ogs_assert(dl_pdr->apn);
dl_pdr->src_if = OGS_PFCP_INTERFACE_CORE;
ul_pdr = ogs_pfcp_pdr_add(&sess->pfcp);
 ogs_assert(ul_pdr);
 bearer->ul_pdr = ul_pdr;
ogs_assert(sess->session.name);
 ul_pdr->apn = ogs_strdup(sess->session.name);
 ogs_assert(ul_pdr->apn);
ul_pdr->src_if = OGS_PFCP_INTERFACE_ACCESS;
ul_pdr->outer_header_removal_len = 1;
 if (sess->session.session_type == OGS_PDU_SESSION_TYPE_IPV4) {
 ul_pdr->outer_header_removal.description =
 OGS_PFCP_OUTER_HEADER_REMOVAL_GTPU_UDP_IPV4;
 } else if (sess->session.session_type == OGS_PDU_SESSION_TYPE_IPV6) {
 ul_pdr->outer_header_removal.description =
 OGS_PFCP_OUTER_HEADER_REMOVAL_GTPU_UDP_IPV6;
 } else if (sess->session.session_type == OGS_PDU_SESSION_TYPE_IPV4V6) {
 ul_pdr->outer_header_removal.description =
 OGS_PFCP_OUTER_HEADER_REMOVAL_GTPU_UDP_IP;
 } else
 ogs_assert_if_reached();
/* FAR */
 dl_far = ogs_pfcp_far_add(&sess->pfcp);
 ogs_assert(dl_far);
 bearer->dl_far = dl_far;
ogs_assert(sess->session.name);
 dl_far->apn = ogs_strdup(sess->session.name);
 ogs_assert(dl_far->apn);
dl_far->dst_if = OGS_PFCP_INTERFACE_ACCESS;
 ogs_pfcp_pdr_associate_far(dl_pdr, dl_far);
dl_far->apply_action =
 OGS_PFCP_APPLY_ACTION_BUFF| OGS_PFCP_APPLY_ACTION_NOCP;
 ogs_assert(sess->pfcp.bar);
ul_far = ogs_pfcp_far_add(&sess->pfcp);
 ogs_assert(ul_far);
 bearer->ul_far = ul_far;
ogs_assert(sess->session.name);
 ul_far->apn = ogs_strdup(sess->session.name);
 ogs_assert(ul_far->apn);
ul_far->dst_if = OGS_PFCP_INTERFACE_CORE;
 ogs_pfcp_pdr_associate_far(ul_pdr, ul_far);
ul_far->apply_action = OGS_PFCP_APPLY_ACTION_FORW;
bearer->sess_id = sess->id;
ogs_list_add(&sess->bearer_list, bearer);
smf_metrics_inst_global_inc(SMF_METR_GLOB_GAUGE_BEARERS_ACTIVE);
 return bearer;
}
int smf_bearer_remove(smf_bearer_t *bearer)
{
 smf_sess_t *sess = NULL;
 ogs_assert(bearer);
 sess = smf_sess_find_by_id(bearer->sess_id);
 ogs_assert(sess);
ogs_list_remove(&sess->bearer_list, bearer);
ogs_assert(bearer->dl_pdr);
 ogs_pfcp_pdr_remove(bearer->dl_pdr);
 ogs_assert(bearer->ul_pdr);
 ogs_pfcp_pdr_remove(bearer->ul_pdr);
 ogs_assert(bearer->dl_far);
 ogs_pfcp_far_remove(bearer->dl_far);
 ogs_assert(bearer->ul_far);
 ogs_pfcp_far_remove(bearer->ul_far);
 if (bearer->urr)
 ogs_pfcp_urr_remove(bearer->urr);
 if (bearer->qer)
 ogs_pfcp_qer_remove(bearer->qer);
if (bearer->pcc_rule.name)
 ogs_free(bearer->pcc_rule.name);
 if (bearer->pcc_rule.id)
 ogs_free(bearer->pcc_rule.id);
 if (bearer->pgw_s5u_addr)
 ogs_freeaddrinfo(bearer->pgw_s5u_addr);
 if (bearer->pgw_s5u_addr6)
 ogs_freeaddrinfo(bearer->pgw_s5u_addr6);
smf_pf_remove_all(bearer);
smf_pf_identifier_pool_final(bearer);
if (SMF_IS_QOF_FLOW(bearer))
 ogs_pool_free(&sess->qfi_pool, bearer->qfi_node);
ogs_pool_id_free(&smf_bearer_pool, bearer);
smf_metrics_inst_global_dec(SMF_METR_GLOB_GAUGE_BEARERS_ACTIVE);
 return OGS_OK;
}
void smf_bearer_remove_all(smf_sess_t *sess)
{
 smf_bearer_t *bearer = NULL, *next_bearer = NULL;
ogs_assert(sess);
 ogs_list_for_each_safe(&sess->bearer_list, next_bearer, bearer)
 smf_bearer_remove(bearer);
}
smf_bearer_t *smf_bearer_find_by_pgw_s5u_teid(
 smf_sess_t *sess, uint32_t pgw_s5u_teid)
{
 smf_bearer_t *bearer = NULL;
ogs_assert(sess);
ogs_list_for_each(&sess->bearer_list, bearer) {
 if (bearer->pgw_s5u_teid == pgw_s5u_teid)
 return bearer;
 }
return NULL;
}
smf_bearer_t *smf_bearer_find_by_ebi(smf_sess_t *sess, uint8_t ebi)
{
 smf_bearer_t *bearer = NULL;
ogs_assert(sess);
ogs_list_for_each(&sess->bearer_list, bearer) {
 if (bearer->ebi == ebi)
 return bearer;
 }
return NULL;
}
smf_bearer_t *smf_bearer_find_by_pcc_rule_name(
 smf_sess_t *sess, char *pcc_rule_name)
{
 smf_bearer_t *bearer = NULL;
ogs_assert(sess);
 ogs_assert(pcc_rule_name);
ogs_list_for_each(&sess->bearer_list, bearer) {
 if (bearer->pcc_rule.name &&
 strcmp(bearer->pcc_rule.name, pcc_rule_name) == 0)
 return bearer;
 }
return NULL;
}
smf_bearer_t *smf_bearer_find_by_pdr_id(
 smf_sess_t *sess, ogs_pfcp_pdr_id_t pdr_id)
{
 smf_bearer_t *bearer = NULL;
ogs_assert(sess);
ogs_list_for_each(&sess->bearer_list, bearer) {
 ogs_pfcp_pdr_t *dl_pdr = NULL;
 ogs_pfcp_pdr_t *ul_pdr = NULL;
dl_pdr = bearer->dl_pdr;
 ogs_assert(dl_pdr);
 ul_pdr = bearer->ul_pdr;
 ogs_assert(ul_pdr);
if (dl_pdr->id == pdr_id || ul_pdr->id == pdr_id)
 return bearer;
 }
return NULL;
}
void smf_bearer_tft_update(smf_bearer_t *bearer)
{
 smf_pf_t *pf = NULL;
 ogs_pfcp_pdr_t *dl_pdr = NULL, *ul_pdr = NULL;
ogs_assert(bearer);
dl_pdr = bearer->dl_pdr;
 ogs_assert(dl_pdr);
 ul_pdr = bearer->ul_pdr;
 ogs_assert(ul_pdr);
dl_pdr->num_of_flow = 0;
 ul_pdr->num_of_flow = 0;
ogs_list_for_each(&bearer->pf_list, pf) {
 if (pf->direction == OGS_FLOW_DOWNLINK_ONLY) {
 dl_pdr->flow[dl_pdr->num_of_flow].fd = 1;
 dl_pdr->flow[dl_pdr->num_of_flow].description =
 pf->flow_description;
 dl_pdr->num_of_flow++;
 } else if (pf->direction == OGS_FLOW_UPLINK_ONLY) {
 ul_pdr->flow[ul_pdr->num_of_flow].fd = 1;
 ul_pdr->flow[ul_pdr->num_of_flow].description =
 pf->flow_description;
 ul_pdr->num_of_flow++;
 } else if (pf->direction == OGS_FLOW_BIDIRECTIONAL) {
 dl_pdr->flow[dl_pdr->num_of_flow].fd = 1;
 dl_pdr->flow[dl_pdr->num_of_flow].description =
 pf->flow_description;
 dl_pdr->flow[dl_pdr->num_of_flow].bid = 1;
 dl_pdr->flow[dl_pdr->num_of_flow].sdf_filter_id = pf->sdf_filter_id;
 dl_pdr->num_of_flow++;
 ul_pdr->flow[ul_pdr->num_of_flow].bid = 1;
 ul_pdr->flow[ul_pdr->num_of_flow].sdf_filter_id = pf->sdf_filter_id;
 ul_pdr->num_of_flow++;
 } else {
 ogs_fatal("Unsupported direction [%d]", pf->direction);
 ogs_assert_if_reached();
 }
 }
}
void smf_bearer_qos_update(smf_bearer_t *bearer)
{
 smf_sess_t *sess = NULL;
ogs_pfcp_pdr_t *dl_pdr = NULL, *ul_pdr = NULL;
 ogs_pfcp_qer_t *qer = NULL;
ogs_assert(bearer);
 sess = smf_sess_find_by_id(bearer->sess_id);
 ogs_assert(sess);
dl_pdr = bearer->dl_pdr;
 ogs_assert(dl_pdr);
 ul_pdr = bearer->ul_pdr;
 ogs_assert(ul_pdr);
qer = bearer->qer;
 if (!qer) {
 qer = ogs_pfcp_qer_add(&sess->pfcp);
 ogs_assert(qer);
 bearer->qer = qer;
 }
ogs_pfcp_pdr_associate_qer(dl_pdr, qer);
 ogs_pfcp_pdr_associate_qer(ul_pdr, qer);
qer->mbr.uplink = bearer->qos.mbr.uplink;
 qer->mbr.downlink = bearer->qos.mbr.downlink;
 qer->gbr.uplink = bearer->qos.gbr.uplink;
 qer->gbr.downlink = bearer->qos.gbr.downlink;
}
smf_bearer_t *smf_default_bearer_in_sess(smf_sess_t *sess)
{
 ogs_assert(sess);
 return ogs_list_first(&sess->bearer_list);
}
smf_ue_t *smf_ue_find_by_id(ogs_pool_id_t id)
{
 return ogs_pool_find_by_id(&smf_ue_pool, id);
}
smf_sess_t *smf_sess_find_by_id(ogs_pool_id_t id)
{
 return ogs_pool_find_by_id(&smf_sess_pool, id);
}
smf_bearer_t *smf_bearer_find_by_id(ogs_pool_id_t id)
{
 return ogs_pool_find_by_id(&smf_bearer_pool, id);
}
smf_bearer_t *smf_qos_flow_find_by_id(ogs_pool_id_t id)
{
 return ogs_pool_find_by_id(&smf_bearer_pool, id);
}
smf_pf_t *smf_pf_find_by_id(ogs_pool_id_t id)
{
 return ogs_pool_find_by_id(&smf_pf_pool, id);
}
smf_pf_t *smf_pf_add(smf_bearer_t *bearer)
{
 smf_sess_t *sess = NULL;
 smf_pf_t *pf = NULL;
ogs_assert(bearer);
 sess = smf_sess_find_by_id(bearer->sess_id);
 ogs_assert(sess);
ogs_pool_id_calloc(&smf_pf_pool, &pf);
 ogs_assert(pf);
ogs_pool_alloc(&bearer->pf_identifier_pool, &pf->identifier_node);
 if (!pf->identifier_node) {
 ogs_error("smf_pf_add: Expectation `pf->identifier_node' failed");
 ogs_pool_id_free(&smf_pf_pool, pf);
 return NULL;
 }
pf->identifier = *(pf->identifier_node);
 ogs_assert(pf->identifier > 0 && pf->identifier <=
 OGS_MAX_NUM_OF_FLOW_IN_BEARER);
ogs_pool_alloc(&sess->pf_precedence_pool, &pf->precedence_node);
 if (!pf->precedence_node) {
 ogs_error("smf_pf_add: Expectation `pf->precedence_node' failed");
 ogs_pool_free(&bearer->pf_identifier_pool, pf->identifier_node);
 ogs_pool_id_free(&smf_pf_pool, pf);
 return NULL;
 }
pf->precedence = *(pf->precedence_node);
 ogs_assert(pf->precedence > 0 && pf->precedence <=
 (OGS_MAX_NUM_OF_BEARER * OGS_MAX_NUM_OF_FLOW_IN_BEARER));
/* Re-use 'pf_precedence_pool' to generate SDF Filter ID */
 pf->sdf_filter_id = *(pf->precedence_node);
pf->bearer_id = bearer->id;
ogs_list_add(&bearer->pf_list, pf);
return pf;
}
int smf_pf_remove(smf_pf_t *pf)
{
 smf_sess_t *sess = NULL;
 smf_bearer_t *bearer = NULL;
ogs_assert(pf);
 bearer = smf_bearer_find_by_id(pf->bearer_id);
 ogs_assert(bearer);
 sess = smf_sess_find_by_id(bearer->sess_id);
 ogs_assert(sess);
ogs_list_remove(&bearer->pf_list, pf);
 if (pf->flow_description)
 ogs_free(pf->flow_description);
if (pf->identifier_node)
 ogs_pool_free(&bearer->pf_identifier_pool, pf->identifier_node);
 if (pf->precedence_node)
 ogs_pool_free(
 &sess->pf_precedence_pool, pf->precedence_node);
ogs_pool_id_free(&smf_pf_pool, pf);
return OGS_OK;
}
void smf_pf_remove_all(smf_bearer_t *bearer)
{
 smf_pf_t *pf = NULL, *next_pf = NULL;
ogs_assert(bearer);
 ogs_list_for_each_safe(&bearer->pf_list, next_pf, pf)
 smf_pf_remove(pf);
}
smf_pf_t *smf_pf_find_by_identifier(
 smf_bearer_t *bearer, uint8_t identifier)
{
 smf_pf_t *pf = NULL;
ogs_list_for_each(&bearer->pf_list, pf) {
 if (pf->identifier == identifier) return pf;
 }
return NULL;
}
smf_pf_t *smf_pf_find_by_flow(
 smf_bearer_t *bearer, uint8_t direction, char *flow_description)
{
 smf_pf_t *pf = NULL;
ogs_list_for_each(&bearer->pf_list, pf) {
 if ((pf->direction == direction) &&
 (!strcmp(pf->flow_description, flow_description))) {
 return pf;
 }
 }
return NULL;
}
smf_pf_t *smf_pf_first(smf_bearer_t *bearer)
{
 return ogs_list_first(&bearer->pf_list);
}
smf_pf_t *smf_pf_next(smf_pf_t *pf)
{
 return ogs_list_next(pf);
}
/*
 * The following code is stolen from osmo-ggsn.
 * https://github.com/osmocom/osmo-ggsn/blob/master/ggsn/pco.c#L26-L43
 */
/* determine if IPCP contains given option */
static const uint8_t *ipcp_contains_option(
 const ogs_pco_ipcp_t *ipcp, size_t ipcp_len,
 enum ogs_pco_ipcp_options opt, size_t opt_minlen)
{
 const uint8_t *cur_opt = (const uint8_t *)ipcp->options;
/* iterate over Options and check if protocol contained */
 while (cur_opt + sizeof(struct ogs_pco_ipcp_options_s) <=
 (uint8_t*)ipcp + ipcp_len) {
 const struct ogs_pco_ipcp_options_s *cur_opt_hdr =
 (const struct ogs_pco_ipcp_options_s *)cur_opt;
 /* length value includes 2 bytes type/length */
 if (cur_opt_hdr->len < 2)
 return NULL;
 if (cur_opt_hdr->type == opt &&
 cur_opt_hdr->len >= 2 + opt_minlen)
 return cur_opt;
 cur_opt += cur_opt_hdr->len;
 }
 return NULL;
}
#include "../version.h"
static const char *pap_welcome = "Welcome to open5gs-smfd " OPEN5GS_VERSION;
int smf_pco_build(uint8_t *pco_buf, uint8_t *buffer, int length)
{
 int rv;
 ogs_pco_t ue, smf;
 ogs_pco_pap_t pco_pap;
 ogs_pco_chap_t pco_chap;
#define OGS_PCO_MAX_NUM_OF_IPCP 4
 ogs_pco_ipcp_t pco_ipcp[OGS_PCO_MAX_NUM_OF_IPCP];
 int num_of_ipcp;
 int pco_size = 0;
 ogs_ipsubnet_t dns_primary, dns_secondary, dns6_primary, dns6_secondary;
 ogs_ipsubnet_t p_cscf, p_cscf6;
 int size = 0;
 int i = 0;
 uint16_t mtu = 0;
ogs_assert(pco_buf);
 ogs_assert(buffer);
 ogs_assert(length);
num_of_ipcp = 0;
 memset(&pco_ipcp, 0, sizeof(pco_ipcp));
size = ogs_pco_parse(&ue, buffer, length);
 ogs_assert(size);
memset(&smf, 0, sizeof(ogs_pco_t));
 smf.ext = ue.ext;
 smf.configuration_protocol = ue.configuration_protocol;
for (i = 0; i < ue.num_of_id; i++) {
 uint8_t *data = ue.ids[i].data;
 switch(ue.ids[i].id) {
 case OGS_PCO_ID_PASSWORD_AUTHENTICATION_PROTOCOL:
 if (data[0] == 1) { /* Code : Authenticate-Request */
 memset(&pco_pap, 0, sizeof(ogs_pco_pap_t));
pco_pap.welcome_len = strlen(pap_welcome);
 memcpy(pco_pap.welcome, pap_welcome, pco_pap.welcome_len);
pco_size =
 4 + /* sizeof(code+identifier+len) */
 1 + /* sizeof(welcome_len) */
 pco_pap.welcome_len;
pco_pap.code = 2; /* Code : Authenticate-Ack */
 pco_pap.identifier = data[1]; /* Identifier */
 pco_pap.len = htobe16(pco_size);
smf.ids[smf.num_of_id].id = ue.ids[i].id;
 smf.ids[smf.num_of_id].len = pco_size;
 smf.ids[smf.num_of_id].data = (uint8_t *)&pco_pap;
 smf.num_of_id++;
 }
 break;
 case OGS_PCO_ID_CHALLENGE_HANDSHAKE_AUTHENTICATION_PROTOCOL:
 if (data[0] == 2) { /* Code : Response */
 memset(&pco_chap, 0, sizeof(ogs_pco_chap_t));
 pco_size = 4; /* sizeof(code+identifier+len) */
pco_chap.code = 3; /* Code : Success */
 pco_chap.identifier = data[1]; /* Identifier */
 pco_chap.len = htobe16(pco_size);
smf.ids[smf.num_of_id].id = ue.ids[i].id;
 smf.ids[smf.num_of_id].len = pco_size;
 smf.ids[smf.num_of_id].data = (uint8_t *)&pco_chap;
 smf.num_of_id++;
 }
 break;
 case OGS_PCO_ID_INTERNET_PROTOCOL_CONTROL_PROTOCOL:
 if (data[0] == 1) { /* Code : Configuration Request */
 ogs_pco_ipcp_t *ipcp = (ogs_pco_ipcp_t *)data;
 uint16_t in_len = 0;
 uint16_t out_len = 0;
 int num_of_option = 0;
ogs_assert(smf_self()->dns[0] || smf_self()->dns[1]);
ogs_assert(ipcp);
 in_len = be16toh(ipcp->len);
ogs_assert(num_of_ipcp <= OGS_PCO_MAX_NUM_OF_IPCP);
 pco_ipcp[num_of_ipcp].code = 2; /* Code : Configuration Ack */
 pco_ipcp[num_of_ipcp].identifier = ipcp->identifier; /* ID: Needs to match request */
out_len = 4;
 /* Primary DNS Server IP Address */
 if (smf_self()->dns[0] &&
 ipcp_contains_option(ipcp, in_len,
 OGS_IPCP_OPT_PRIMARY_DNS, 4)) {
 rv = ogs_ipsubnet(
 &dns_primary, smf_self()->dns[0], NULL);
 ogs_assert(rv == OGS_OK);
 ogs_assert(
 num_of_option <= OGS_PCO_MAX_NUM_OF_IPCP_OPTIONS);
 pco_ipcp[num_of_ipcp].options[num_of_option].type =
 OGS_IPCP_OPT_PRIMARY_DNS;
 pco_ipcp[num_of_ipcp].options[num_of_option].len = 6;
 pco_ipcp[num_of_ipcp].options[num_of_option].addr =
 dns_primary.sub[0];
 num_of_option++;
out_len += 6;
 }
/* Secondary DNS Server IP Address */
 if (smf_self()->dns[1] &&
 ipcp_contains_option(ipcp, in_len,
 OGS_IPCP_OPT_SECONDARY_DNS, 4)) {
 rv = ogs_ipsubnet(
 &dns_secondary, smf_self()->dns[1], NULL);
 ogs_assert(rv == OGS_OK);
 ogs_assert(
 num_of_option <= OGS_PCO_MAX_NUM_OF_IPCP_OPTIONS);
 pco_ipcp[num_of_ipcp].options[num_of_option].type =
 OGS_IPCP_OPT_SECONDARY_DNS;
 pco_ipcp[num_of_ipcp].options[num_of_option].len = 6;
 pco_ipcp[num_of_ipcp].options[num_of_option].addr =
 dns_secondary.sub[0];
 num_of_option++;
out_len += 6;
 }
pco_ipcp[num_of_ipcp].len = htobe16(out_len);
smf.ids[smf.num_of_id].id = ue.ids[i].id;
 smf.ids[smf.num_of_id].len = out_len;
 smf.ids[smf.num_of_id].data = (uint8_t *)&pco_ipcp[num_of_ipcp];
num_of_ipcp++;
smf.num_of_id++;
 }
 break;
 case OGS_PCO_ID_DNS_SERVER_IPV4_ADDRESS_REQUEST:
 if (smf_self()->dns[0]) {
 rv = ogs_ipsubnet(
 &dns_primary, smf_self()->dns[0], NULL);
 ogs_assert(rv == OGS_OK);
 smf.ids[smf.num_of_id].id = ue.ids[i].id;
 smf.ids[smf.num_of_id].len = OGS_IPV4_LEN;
 smf.ids[smf.num_of_id].data = dns_primary.sub;
 smf.num_of_id++;
 }
if (smf_self()->dns[1]) {
 rv = ogs_ipsubnet(
 &dns_secondary, smf_self()->dns[1], NULL);
 ogs_assert(rv == OGS_OK);
 smf.ids[smf.num_of_id].id = ue.ids[i].id;
 smf.ids[smf.num_of_id].len = OGS_IPV4_LEN;
 smf.ids[smf.num_of_id].data = dns_secondary.sub;
 smf.num_of_id++;
 }
 break;
 case OGS_PCO_ID_DNS_SERVER_IPV6_ADDRESS_REQUEST:
 if (smf_self()->dns6[0]) {
 rv = ogs_ipsubnet(
 &dns6_primary, smf_self()->dns6[0], NULL);
 ogs_assert(rv == OGS_OK);
 smf.ids[smf.num_of_id].id = ue.ids[i].id;
 smf.ids[smf.num_of_id].len = OGS_IPV6_LEN;
 smf.ids[smf.num_of_id].data = dns6_primary.sub;
 smf.num_of_id++;
 }
if (smf_self()->dns6[1]) {
 rv = ogs_ipsubnet(
 &dns6_secondary, smf_self()->dns6[1], NULL);
 ogs_assert(rv == OGS_OK);
 smf.ids[smf.num_of_id].id = ue.ids[i].id;
 smf.ids[smf.num_of_id].len = OGS_IPV6_LEN;
 smf.ids[smf.num_of_id].data = dns6_secondary.sub;
 smf.num_of_id++;
 }
 break;
 case OGS_PCO_ID_P_CSCF_IPV4_ADDRESS_REQUEST:
 if (smf_self()->num_of_p_cscf) {
 rv = ogs_ipsubnet(&p_cscf,
 smf_self()->p_cscf[smf_self()->p_cscf_index], NULL);
 ogs_assert(rv == OGS_OK);
 smf.ids[smf.num_of_id].id = ue.ids[i].id;
 smf.ids[smf.num_of_id].len = OGS_IPV4_LEN;
 smf.ids[smf.num_of_id].data = p_cscf.sub;
 smf.num_of_id++;
smf_self()->p_cscf_index++;
 smf_self()->p_cscf_index %= smf_self()->num_of_p_cscf;
 }
 break;
 case OGS_PCO_ID_P_CSCF_IPV6_ADDRESS_REQUEST:
 if (smf_self()->num_of_p_cscf6) {
 rv = ogs_ipsubnet(&p_cscf6,
 smf_self()->p_cscf6[smf_self()->p_cscf6_index], NULL);
 ogs_assert(rv == OGS_OK);
 smf.ids[smf.num_of_id].id = ue.ids[i].id;
 smf.ids[smf.num_of_id].len = OGS_IPV6_LEN;
 smf.ids[smf.num_of_id].data = p_cscf6.sub;
 smf.num_of_id++;
smf_self()->p_cscf6_index++;
 smf_self()->p_cscf6_index %= smf_self()->num_of_p_cscf6;
 }
 break;
 case OGS_PCO_ID_IPV4_LINK_MTU_REQUEST:
 if (smf_self()->mtu) {
 mtu = htobe16(smf_self()->mtu);
 smf.ids[smf.num_of_id].id = ue.ids[i].id;
 smf.ids[smf.num_of_id].len = sizeof(uint16_t);
 smf.ids[smf.num_of_id].data = &mtu;
 smf.num_of_id++;
 }
 break;
 case OGS_PCO_ID_IP_ADDRESS_ALLOCATION_VIA_NAS_SIGNALLING:
 /* TODO */
 break;
 case OGS_PCO_ID_MS_SUPPORTS_BCM:
 /* TODO */
 break;
 case OGS_PCO_ID_MS_SUPPORT_LOCAL_ADDR_TFT_INDICATOR:
 /* TODO */
 break;
 case OGS_PCO_ID_P_CSCF_RE_SELECTION_SUPPORT:
 /* TODO */
 break;
 default:
 ogs_warn("Unknown PCO ID:(0x%x)", ue.ids[i].id);
 }
 }
size = ogs_pco_build(pco_buf, OGS_MAX_PCO_LEN, &smf);
 return size;
}
void smf_qfi_pool_init(smf_sess_t *sess)
{
 ogs_assert(sess);
ogs_pool_create(&sess->qfi_pool, OGS_MAX_QOS_FLOW_ID);
 ogs_pool_sequence_id_generate(&sess->qfi_pool);
}
void smf_qfi_pool_final(smf_sess_t *sess)
{
 ogs_assert(sess);
ogs_pool_destroy(&sess->qfi_pool);
}
void smf_pf_identifier_pool_init(smf_bearer_t *bearer)
{
 ogs_assert(bearer);
ogs_pool_create(&bearer->pf_identifier_pool, OGS_MAX_NUM_OF_FLOW_IN_BEARER);
 ogs_pool_sequence_id_generate(&bearer->pf_identifier_pool);
}
void smf_pf_identifier_pool_final(smf_bearer_t *bearer)
{
 ogs_assert(bearer);
ogs_pool_destroy(&bearer->pf_identifier_pool);
}
void smf_pf_precedence_pool_init(smf_sess_t *sess)
{
 ogs_assert(sess);
ogs_pool_create(&sess->pf_precedence_pool,
 OGS_MAX_NUM_OF_BEARER * OGS_MAX_NUM_OF_FLOW_IN_BEARER);
 ogs_pool_sequence_id_generate(&sess->pf_precedence_pool);
}
void smf_pf_precedence_pool_final(smf_sess_t *sess)
{
 ogs_assert(sess);
ogs_pool_destroy(&sess->pf_precedence_pool);
}
static void stats_add_smf_session(void)
{
 num_of_smf_sess = num_of_smf_sess + 1;
 ogs_info("[Added] Number of SMF-Sessions is now %d", num_of_smf_sess);
}
static void stats_remove_smf_session(smf_sess_t *sess)
{
 ogs_assert(sess);
num_of_smf_sess = num_of_smf_sess - 1;
 ogs_info("[Removed] Number of SMF-Sessions is now %d", num_of_smf_sess);
}
int smf_instance_get_load(void)
{
 return (((ogs_pool_size(&smf_sess_pool) -
 ogs_pool_avail(&smf_sess_pool)) * 100) /
 ogs_pool_size(&smf_sess_pool));
}
int smf_integrity_protection_indication_value2enum(const char *value)
{
 ogs_assert(value);
 if (!strcmp(value, "required"))
 return NGAP_IntegrityProtectionIndication_required;
 else if (!strcmp(value, "preferred"))
 return NGAP_IntegrityProtectionIndication_preferred;
 else if (!strcmp(value, "not-needed"))
 return NGAP_IntegrityProtectionIndication_not_needed;
 else {
 ogs_error("Invalid value[%s]", value);
 return -1;
 }
}
int smf_confidentiality_protection_indication_value2enum(const char *value)
{
 ogs_assert(value);
 return smf_integrity_protection_indication_value2enum(value);
}
int smf_maximum_integrity_protected_data_rate_uplink_value2enum(
 const char *value)
{
 ogs_assert(value);
 if (!strcmp(value, "bitrate64kbs"))
 return NGAP_MaximumIntegrityProtectedDataRate_bitrate64kbs;
 else if (!strcmp(value, "maximum-UE-rate"))
 return NGAP_MaximumIntegrityProtectedDataRate_maximum_UE_rate;
 else {
 ogs_error("Invalid value[%s]", value);
 return -1;
 }
}
int smf_maximum_integrity_protected_data_rate_downlink_value2enum(
 const char *value)
{
 ogs_assert(value);
 return smf_maximum_integrity_protected_data_rate_uplink_value2enum(value);
}