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open5gs/src/pcf/nbsf-handler.c

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/*
* Copyright (C) 2019,2020 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 "sbi-path.h"
#include "nbsf-handler.h"
bool pcf_nbsf_management_handle_register(
pcf_sess_t *sess, ogs_sbi_stream_t *stream, ogs_sbi_message_t *recvmsg)
{
int i, rv, status = 0;
char *strerror = NULL;
pcf_ue_t *pcf_ue = NULL;
ogs_sbi_server_t *server = NULL;
ogs_sbi_message_t sendmsg;
ogs_sbi_header_t header;
ogs_sbi_response_t *response = NULL;
ogs_sbi_message_t message;
ogs_session_data_t session_data;
ogs_session_t *session = NULL;
OpenAPI_pcf_binding_t *PcfBinding = NULL;
OpenAPI_sm_policy_decision_t SmPolicyDecision;
OpenAPI_lnode_t *node = NULL;
OpenAPI_list_t *SessRuleList = NULL;
OpenAPI_map_t *SessRuleMap = NULL;
OpenAPI_session_rule_t *SessionRule = NULL;
OpenAPI_ambr_t AuthSessAmbr;
OpenAPI_authorized_default_qos_t AuthDefQos;
OpenAPI_list_t *PccRuleList = NULL;
OpenAPI_map_t *PccRuleMap = NULL;
OpenAPI_pcc_rule_t *PccRule = NULL;
OpenAPI_list_t *QosDecisionList = NULL;
OpenAPI_map_t *QosDecisionMap = NULL;
OpenAPI_qos_data_t *QosData = NULL;
OpenAPI_list_t *PolicyCtrlReqTriggers = NULL;
ogs_assert(sess);
pcf_ue = sess->pcf_ue;
ogs_assert(pcf_ue);
ogs_assert(stream);
server = ogs_sbi_server_from_stream(stream);
ogs_assert(server);
ogs_assert(recvmsg);
memset(&session_data, 0, sizeof(ogs_session_data_t));
ogs_assert(pcf_ue->supi);
ogs_assert(sess->dnn);
if (!recvmsg->http.location) {
strerror = ogs_msprintf("[%s:%d] No http.location",
pcf_ue->supi, sess->psi);
status = OGS_SBI_HTTP_STATUS_BAD_REQUEST;
goto cleanup;
}
if (!recvmsg->PcfBinding) {
strerror = ogs_msprintf("[%s:%d] No PcfBinding",
pcf_ue->supi, sess->psi);
status = OGS_SBI_HTTP_STATUS_BAD_REQUEST;
goto cleanup;
}
PcfBinding = recvmsg->PcfBinding;
if (PcfBinding->supp_feat) {
uint64_t supported_features =
ogs_uint64_from_string(PcfBinding->supp_feat);
sess->management_features &= supported_features;
}
memset(&header, 0, sizeof(header));
header.uri = recvmsg->http.location;
rv = ogs_sbi_parse_header(&message, &header);
if (rv != OGS_OK) {
strerror = ogs_msprintf("[%s:%d] Cannot parse http.location [%s]",
pcf_ue->supi, sess->psi, recvmsg->http.location);
goto cleanup;
}
if (!message.h.resource.component[1]) {
strerror = ogs_msprintf("[%s:%d] No Binding ID [%s]",
pcf_ue->supi, sess->psi, recvmsg->http.location);
ogs_sbi_header_free(&header);
goto cleanup;
}
if (sess->binding_id)
ogs_free(sess->binding_id);
sess->binding_id = ogs_strdup(message.h.resource.component[1]);
ogs_assert(sess->binding_id);
ogs_sbi_header_free(&header);
rv = ogs_dbi_session_data(
pcf_ue->supi, &sess->s_nssai, sess->dnn, OGS_DBI_NO_CHARGING_CHAR,
&session_data);
if (rv != OGS_OK) {
strerror = ogs_msprintf("[%s:%d] Cannot find SUPI in DB",
pcf_ue->supi, sess->psi);
status = OGS_SBI_HTTP_STATUS_NOT_FOUND;
goto cleanup;
}
session = &session_data.session;
if (!session->qos.index) {
strerror = ogs_msprintf("[%s:%d] No 5QI", pcf_ue->supi, sess->psi);
status = OGS_SBI_HTTP_STATUS_BAD_REQUEST;
goto cleanup;
}
if (!session->qos.arp.priority_level) {
strerror = ogs_msprintf("[%s:%d] No Priority Level",
pcf_ue->supi, sess->psi);
status = OGS_SBI_HTTP_STATUS_BAD_REQUEST;
goto cleanup;
}
if (!session->ambr.uplink && !session->ambr.downlink) {
strerror = ogs_msprintf("[%s:%d] No Session-AMBR",
pcf_ue->supi, sess->psi);
status = OGS_SBI_HTTP_STATUS_BAD_REQUEST;
goto cleanup;
}
memset(&SmPolicyDecision, 0, sizeof(SmPolicyDecision));
PolicyCtrlReqTriggers = OpenAPI_list_create();
ogs_assert(PolicyCtrlReqTriggers);
/**************************************************************
* Session Rule
*************************************************************/
SessRuleList = OpenAPI_list_create();
ogs_assert(SessRuleList);
SessionRule = ogs_calloc(1, sizeof(*SessionRule));
ogs_assert(SessionRule);
/* Only 1 SessionRule is used */
SessionRule->sess_rule_id = (char *)"1";
if (OGS_SBI_FEATURES_IS_SET(sess->smpolicycontrol_features,
OGS_SBI_NPCF_SMPOLICYCONTROL_DN_AUTHORIZATION)) {
if (sess->subscribed_sess_ambr) {
ogs_bitrate_t subscribed_sess_ambr;
subscribed_sess_ambr.uplink = ogs_sbi_bitrate_from_string(
sess->subscribed_sess_ambr->uplink);
subscribed_sess_ambr.downlink = ogs_sbi_bitrate_from_string(
sess->subscribed_sess_ambr->downlink);
if (((subscribed_sess_ambr.uplink / 1024) !=
(session->ambr.uplink / 1024)) ||
((subscribed_sess_ambr.downlink / 1024) !=
(session->ambr.downlink / 1024))) {
OpenAPI_list_add(PolicyCtrlReqTriggers,
(void *)OpenAPI_policy_control_request_trigger_SE_AMBR_CH);
}
memset(&AuthSessAmbr, 0, sizeof(AuthSessAmbr));
AuthSessAmbr.uplink = ogs_sbi_bitrate_to_string(
session->ambr.uplink, OGS_SBI_BITRATE_KBPS);
AuthSessAmbr.downlink = ogs_sbi_bitrate_to_string(
session->ambr.downlink, OGS_SBI_BITRATE_KBPS);
SessionRule->auth_sess_ambr = &AuthSessAmbr;
}
}
if (sess->subscribed_default_qos) {
bool triggered = false;
memset(&AuthDefQos, 0, sizeof(AuthDefQos));
AuthDefQos.arp = ogs_calloc(1, sizeof(OpenAPI_arp_t));
ogs_assert(AuthDefQos.arp);
AuthDefQos.is__5qi = true;
AuthDefQos._5qi = session->qos.index;
AuthDefQos.is_priority_level = true;
AuthDefQos.priority_level = session->qos.arp.priority_level;
if (session->qos.arp.pre_emption_capability ==
OGS_5GC_PRE_EMPTION_ENABLED)
AuthDefQos.arp->preempt_cap =
OpenAPI_preemption_capability_MAY_PREEMPT;
else if (session->qos.arp.pre_emption_capability ==
OGS_5GC_PRE_EMPTION_DISABLED)
AuthDefQos.arp->preempt_cap =
OpenAPI_preemption_capability_NOT_PREEMPT;
ogs_assert(AuthDefQos.arp->preempt_cap);
if (session->qos.arp.pre_emption_vulnerability ==
OGS_5GC_PRE_EMPTION_ENABLED)
AuthDefQos.arp->preempt_vuln =
OpenAPI_preemption_vulnerability_PREEMPTABLE;
else if (session->qos.arp.pre_emption_vulnerability ==
OGS_5GC_PRE_EMPTION_DISABLED)
AuthDefQos.arp->preempt_vuln =
OpenAPI_preemption_vulnerability_NOT_PREEMPTABLE;
ogs_assert(AuthDefQos.arp->preempt_vuln);
AuthDefQos.arp->priority_level = session->qos.arp.priority_level;
SessionRule->auth_def_qos = &AuthDefQos;
if (sess->subscribed_default_qos->_5qi != AuthDefQos._5qi)
triggered = true;
if (sess->subscribed_default_qos->priority_level !=
AuthDefQos.priority_level)
triggered = true;
if (sess->subscribed_default_qos->arp) {
if (sess->subscribed_default_qos->arp->priority_level !=
AuthDefQos.arp->priority_level)
triggered = true;
if (sess->subscribed_default_qos->arp->preempt_cap !=
AuthDefQos.arp->preempt_cap)
triggered = true;
if (sess->subscribed_default_qos->arp->preempt_vuln !=
AuthDefQos.arp->preempt_vuln)
triggered = true;
}
if (triggered)
OpenAPI_list_add(PolicyCtrlReqTriggers,
(void *)OpenAPI_policy_control_request_trigger_DEF_QOS_CH);
}
SessRuleMap = OpenAPI_map_create(
SessionRule->sess_rule_id, SessionRule);
ogs_assert(SessRuleMap);
OpenAPI_list_add(SessRuleList, SessRuleMap);
if (SessRuleList->count)
SmPolicyDecision.sess_rules = SessRuleList;
/**************************************************************
* PCC Rule & QoS Decision
*************************************************************/
PccRuleList = OpenAPI_list_create();
ogs_assert(PccRuleList);
QosDecisionList = OpenAPI_list_create();
ogs_assert(QosDecisionList);
for (i = 0; i < session_data.num_of_pcc_rule; i++) {
ogs_pcc_rule_t *pcc_rule = &session_data.pcc_rule[i];
ogs_assert(pcc_rule);
if (!pcc_rule->num_of_flow) {
/* No Flow */
continue;
}
PccRule = ogs_sbi_build_pcc_rule(pcc_rule, 1);
ogs_assert(PccRule->pcc_rule_id);
PccRuleMap = OpenAPI_map_create(PccRule->pcc_rule_id, PccRule);
ogs_assert(PccRuleMap);
OpenAPI_list_add(PccRuleList, PccRuleMap);
QosData = ogs_sbi_build_qos_data(pcc_rule);
ogs_assert(QosData);
ogs_assert(QosData->qos_id);
QosDecisionMap = OpenAPI_map_create(QosData->qos_id, QosData);
ogs_assert(QosDecisionMap);
OpenAPI_list_add(QosDecisionList, QosDecisionMap);
}
if (PccRuleList->count)
SmPolicyDecision.pcc_rules = PccRuleList;
if (QosDecisionList->count)
SmPolicyDecision.qos_decs = QosDecisionList;
/* Policy Control Request Triggers */
if (PolicyCtrlReqTriggers->count)
SmPolicyDecision.policy_ctrl_req_triggers = PolicyCtrlReqTriggers;
/* Supported Features */
if (sess->smpolicycontrol_features) {
SmPolicyDecision.supp_feat =
ogs_uint64_to_string(sess->smpolicycontrol_features);
ogs_assert(SmPolicyDecision.supp_feat);
}
memset(&header, 0, sizeof(header));
header.service.name = (char *)OGS_SBI_SERVICE_NAME_NPCF_SMPOLICYCONTROL;
header.api.version = (char *)OGS_SBI_API_V1;
header.resource.component[0] = (char *)OGS_SBI_RESOURCE_NAME_POLICIES;
header.resource.component[1] = sess->sm_policy_id;
memset(&sendmsg, 0, sizeof(sendmsg));
sendmsg.SmPolicyDecision = &SmPolicyDecision;
sendmsg.http.location = ogs_sbi_server_uri(server, &header);
response = ogs_sbi_build_response(
&sendmsg, OGS_SBI_HTTP_STATUS_CREATED);
ogs_assert(response);
ogs_assert(true == ogs_sbi_server_send_response(stream, response));
ogs_free(sendmsg.http.location);
OpenAPI_list_for_each(SessRuleList, node) {
SessRuleMap = node->data;
if (SessRuleMap) {
SessionRule = SessRuleMap->value;
if (SessionRule) {
if (SessionRule->auth_sess_ambr) {
if (SessionRule->auth_sess_ambr->uplink)
ogs_free(SessionRule->auth_sess_ambr->uplink);
if (SessionRule->auth_sess_ambr->downlink)
ogs_free(SessionRule->auth_sess_ambr->downlink);
}
if (SessionRule->auth_def_qos) {
ogs_free(SessionRule->auth_def_qos->arp);
}
ogs_free(SessionRule);
}
ogs_free(SessRuleMap);
}
}
OpenAPI_list_free(SessRuleList);
OpenAPI_list_for_each(PccRuleList, node) {
PccRuleMap = node->data;
if (PccRuleMap) {
PccRule = PccRuleMap->value;
if (PccRule)
ogs_sbi_free_pcc_rule(PccRule);
ogs_free(PccRuleMap);
}
}
OpenAPI_list_free(PccRuleList);
OpenAPI_list_for_each(QosDecisionList, node) {
QosDecisionMap = node->data;
if (QosDecisionMap) {
QosData = QosDecisionMap->value;
if (QosData)
ogs_sbi_free_qos_data(QosData);
ogs_free(QosDecisionMap);
}
}
OpenAPI_list_free(QosDecisionList);
OpenAPI_list_free(PolicyCtrlReqTriggers);
if (SmPolicyDecision.supp_feat)
ogs_free(SmPolicyDecision.supp_feat);
ogs_session_data_free(&session_data);
return true;
cleanup:
ogs_assert(strerror);
ogs_assert(status);
ogs_error("%s", strerror);
ogs_assert(true ==
ogs_sbi_server_send_error(stream, status, recvmsg, strerror, NULL));
ogs_free(strerror);
ogs_session_data_free(&session_data);
return false;
}
bool pcf_nbsf_management_handle_de_register(
pcf_sess_t *sess, ogs_sbi_stream_t *stream, ogs_sbi_message_t *recvmsg)
{
ogs_sbi_message_t sendmsg;
ogs_sbi_response_t *response = NULL;
ogs_assert(sess);
ogs_assert(stream);
memset(&sendmsg, 0, sizeof(sendmsg));
response = ogs_sbi_build_response(
&sendmsg, OGS_SBI_HTTP_STATUS_NO_CONTENT);
ogs_assert(response);
ogs_assert(true == ogs_sbi_server_send_response(stream, response));
return true;
}
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