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open5gs/src/smf/sbi-path.c

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/*
* Copyright (C) 2019-2022 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 "ngap-path.h"
#include "sbi-path.h"
int smf_sbi_open(void)
{
ogs_sbi_nf_instance_t *nf_instance = NULL;
ogs_sbi_nf_service_t *service = NULL;
/*
* SMF can only run to support 4G EPC mode.
*
* If the SMF is only running in 4G EPC mode,
* it should not send NFRegister/NFStatusSubscribe messages to the NRF.
*/
if (ogs_sbi_server_first() == NULL)
return OGS_OK;
/* Initialize SELF NF instance */
nf_instance = ogs_sbi_self()->nf_instance;
ogs_assert(nf_instance);
ogs_sbi_nf_fsm_init(nf_instance);
/* Build NF instance information. It will be transmitted to NRF. */
ogs_sbi_nf_instance_build_default(nf_instance);
ogs_sbi_nf_instance_add_allowed_nf_type(nf_instance, OpenAPI_nf_type_SCP);
ogs_sbi_nf_instance_add_allowed_nf_type(nf_instance, OpenAPI_nf_type_AMF);
/* Build NF service information. It will be transmitted to NRF. */
if (ogs_sbi_nf_service_is_available(OGS_SBI_SERVICE_NAME_NSMF_PDUSESSION)) {
service = ogs_sbi_nf_service_build_default(
nf_instance, OGS_SBI_SERVICE_NAME_NSMF_PDUSESSION);
ogs_assert(service);
ogs_sbi_nf_service_add_version(
service, OGS_SBI_API_V1, OGS_SBI_API_V1_0_0, NULL);
ogs_sbi_nf_service_add_allowed_nf_type(service, OpenAPI_nf_type_AMF);
}
/* Initialize NRF NF Instance */
nf_instance = ogs_sbi_self()->nrf_instance;
if (nf_instance)
ogs_sbi_nf_fsm_init(nf_instance);
/* Setup Subscription-Data */
ogs_sbi_subscription_spec_add(OpenAPI_nf_type_SEPP, NULL);
ogs_sbi_subscription_spec_add(
OpenAPI_nf_type_NULL, OGS_SBI_SERVICE_NAME_NAMF_COMM);
ogs_sbi_subscription_spec_add(
OpenAPI_nf_type_NULL, OGS_SBI_SERVICE_NAME_NPCF_SMPOLICYCONTROL);
ogs_sbi_subscription_spec_add(
OpenAPI_nf_type_NULL, OGS_SBI_SERVICE_NAME_NUDM_SDM);
ogs_sbi_subscription_spec_add(
OpenAPI_nf_type_NULL, OGS_SBI_SERVICE_NAME_NUDM_UECM);
if (ogs_sbi_server_start_all(ogs_sbi_server_handler) != OGS_OK)
return OGS_ERROR;
return OGS_OK;
}
void smf_sbi_close(void)
{
ogs_sbi_client_stop_all();
ogs_sbi_server_stop_all();
}
bool smf_sbi_send_request(
ogs_sbi_nf_instance_t *nf_instance, ogs_sbi_xact_t *xact)
{
ogs_assert(nf_instance);
ogs_assert(xact);
return ogs_sbi_send_request_to_nf_instance(nf_instance, xact);
}
int smf_sbi_discover_and_send(
ogs_sbi_service_type_e service_type,
ogs_sbi_discovery_option_t *discovery_option,
ogs_sbi_request_t *(*build)(smf_sess_t *sess, void *data),
smf_sess_t *sess, ogs_sbi_stream_t *stream, int state, void *data)
{
int r;
smf_ue_t *smf_ue = NULL;
ogs_sbi_xact_t *xact = NULL;
OpenAPI_nf_type_e target_nf_type = OpenAPI_nf_type_NULL;
ogs_assert(service_type);
target_nf_type = ogs_sbi_service_type_to_nf_type(service_type);
ogs_assert(target_nf_type);
ogs_assert(sess);
smf_ue = sess->smf_ue;
ogs_assert(smf_ue);
ogs_assert(build);
/*
* Use ogs_sbi_supi_in_vplmn() instead of ogs_sbi_plmn_id_in_vplmn().
* This is because some vendors might not use the full DNN in LBO and
* Open5GS cannot derive the home PLMN ID without the full DNN.
*
* TS29.502
* 6.1 Nsmf_PDUSession Service API
* Table 6.1.6.2.2-1: Definition of type SmContextCreateData
*
* NAME: dnn
* Data type: Dnn
* P: C
* Cardinality: 0..1
*
* This IE shall be present, except during an EPS to 5GS Idle mode mobility
* or handover using the N26 interface.
*
* When present, it shall contain the requested DNN; the DNN shall
* be the full DNN (i.e. with both the Network Identifier and
* Operator Identifier) for a HR PDU session, and it should be
* the full DNN in LBO and non-roaming scenarios. If the Operator Identifier
* is absent, the serving core network operator shall be assumed.
*
* TS29.512
* 5 Npcf_SMPolicyControl Service API
* 5.6 Data Model
* 5.6.2 Structured data types
* Table 5.6.2.3-1: Definition of type SmPolicyContextData
*
* NAME: dnn
* Data type: Dnn
* P: M
* Cardinality: 1
* The DNN of the PDU session, a full DNN with both the Network Identifier
* and Operator Identifier, or a DNN with the Network Identifier only
*/
if (target_nf_type == OpenAPI_nf_type_UDM &&
ogs_sbi_supi_in_vplmn(smf_ue->supi) == true) {
int i;
/* TODO: PCF and UDM Selection
*
* FROM: Ultra Cloud Core 5G Session Management Function,
* Release 2023.04 - Configuration and Administration Guide
* https://www.cisco.com/c/en/us/td/docs/wireless/ucc/smf/2023-04/config-and-admin/b_ucc-5g-smf-config-and-admin-guide_2023-04/m_roaming-support.html#Cisco_Reference.dita_ed2a198e-b60d-4d77-b09c-932d82169c11https://www.cisco.com/c/en/us/td/docs/wireless/ucc/smf/2023-04/config-and-admin/b_ucc-5g-smf-config-and-admin-guide_2023-04/m_roaming-support.html#Cisco_Reference.dita_ed2a198e-b60d-4d77-b09c-932d82169c11
*
* During roaming, the AMF selects both vPCF and hPCF and sends
* the vPCF ID and hPCF ID to the SMF and vPCF respectively
* during policy association. The SMF selects the PCF
* using the received vPCF ID.
*
* During AMF relocation, target AMF selects a new vPCF and hPCF.
* The SMF receives a redirection indication with PCF ID
* from the existing PCF for the PDU session. The SMF terminates
* the current SM Policy Control association and reselects
* a PCF based on the received PCF ID.
*
* The SMF then establishes an SM Policy Control association
* with the reselected PCF.
*
* For selection of PCF and UDM based on local configuration,
* the locally configured addresses map to the VPLMN and HPLMN
* respectively since the PCF is in VPLMN and the UDM is in HPLMN
* for roaming with LBO case.
*
* For NRF-based discovery of PCF and UDM, the query criteria includes
* VPLMN for PCF discovery and HPLMN for UDM discovery. The AMF sends
* the UDM group ID to enable the SMF to select UDM.
*
* The S-NSSAI used by SMF to select PCF should be the VPLMN S-NSSAI
* received from AMF.
*/
if (!discovery_option) {
discovery_option = ogs_sbi_discovery_option_new();
ogs_assert(discovery_option);
}
ogs_sbi_discovery_option_add_target_plmn_list(
discovery_option, &sess->home_plmn_id);
ogs_assert(ogs_local_conf()->num_of_serving_plmn_id);
for (i = 0; i < ogs_local_conf()->num_of_serving_plmn_id; i++) {
ogs_sbi_discovery_option_add_requester_plmn_list(
discovery_option, &ogs_local_conf()->serving_plmn_id[i]);
}
}
xact = ogs_sbi_xact_add(
&sess->sbi, service_type, discovery_option,
(ogs_sbi_build_f)build, sess, data);
if (!xact) {
ogs_error("smf_sbi_discover_and_send() failed");
if (stream)
ogs_assert(true ==
ogs_sbi_server_send_error(stream,
OGS_SBI_HTTP_STATUS_GATEWAY_TIMEOUT, NULL,
"Cannot discover", smf_ue->supi, NULL));
return OGS_ERROR;
}
xact->state = state;
xact->assoc_stream = stream;
r = ogs_sbi_discover_and_send(xact);
if (r != OGS_OK) {
ogs_error("smf_sbi_discover_and_send() failed");
ogs_sbi_xact_remove(xact);
if (stream)
ogs_assert(true ==
ogs_sbi_server_send_error(stream,
OGS_SBI_HTTP_STATUS_GATEWAY_TIMEOUT, NULL,
"Cannot discover", smf_ue->supi, NULL));
return r;
}
return OGS_OK;
}
void smf_namf_comm_send_n1_n2_message_transfer(
smf_sess_t *sess, smf_n1_n2_message_transfer_param_t *param)
{
smf_ue_t *smf_ue = NULL;
ogs_sbi_xact_t *xact = NULL;
ogs_sbi_discovery_option_t *discovery_option = NULL;
int r;
ogs_assert(sess);
smf_ue = sess->smf_ue;
ogs_assert(smf_ue);
ogs_assert(param);
ogs_assert(param->state);
ogs_assert(param->n1smbuf || param->n2smbuf);
discovery_option = ogs_sbi_discovery_option_new();
ogs_assert(discovery_option);
ogs_sbi_discovery_option_set_target_nf_instance_id(
discovery_option, sess->serving_nf_id);
xact = ogs_sbi_xact_add(
&sess->sbi, OGS_SBI_SERVICE_TYPE_NAMF_COMM, discovery_option,
(ogs_sbi_build_f)smf_namf_comm_build_n1_n2_message_transfer,
sess, param);
if (!xact) {
ogs_error("smf_namf_comm_send_n1_n2_message_transfer() failed");
return;
}
xact->state = param->state;
r = ogs_sbi_discover_and_send(xact);
if (r != OGS_OK) {
ogs_error("smf_namf_comm_send_n1_n2_message_transfer() failed");
ogs_sbi_xact_remove(xact);
ogs_assert(r != OGS_ERROR);
}
}
void smf_namf_comm_send_n1_n2_pdu_establishment_reject(
smf_sess_t *sess)
{
smf_n1_n2_message_transfer_param_t param;
memset(&param, 0, sizeof(param));
param.state = SMF_NETWORK_REQUESTED_PDU_SESSION_RELEASE;
param.n1smbuf = gsm_build_pdu_session_establishment_reject(sess,
OGS_5GSM_CAUSE_NETWORK_FAILURE);
ogs_assert(param.n1smbuf);
smf_namf_comm_send_n1_n2_message_transfer(sess, &param);
}
void smf_sbi_send_sm_context_create_error(
ogs_sbi_stream_t *stream,
int status, ogs_sbi_app_errno_e err,
const char *title, const char *detail,
ogs_pkbuf_t *n1smbuf)
{
ogs_sbi_message_t sendmsg;
ogs_sbi_response_t *response = NULL;
OpenAPI_sm_context_create_error_t SmContextCreateError;
OpenAPI_ext_problem_details_t problem;
OpenAPI_ref_to_binary_data_t n1SmMsg;
ogs_assert(stream);
memset(&problem, 0, sizeof(problem));
if (status) {
problem.is_status = true;
problem.status = status;
}
problem.title = (char*)title;
problem.detail = (char*)detail;
if (err > OGS_SBI_APP_ERRNO_NULL && err < OGS_SBI_MAX_NUM_OF_APP_ERRNO)
problem.cause = (char*)ogs_sbi_app_strerror(err);
memset(&sendmsg, 0, sizeof(sendmsg));
sendmsg.SmContextCreateError = &SmContextCreateError;
memset(&SmContextCreateError, 0, sizeof(SmContextCreateError));
SmContextCreateError.error = &problem;
if (n1smbuf) {
SmContextCreateError.n1_sm_msg = &n1SmMsg;
n1SmMsg.content_id = (char *)OGS_SBI_CONTENT_5GNAS_SM_ID;
sendmsg.part[0].content_id = (char *)OGS_SBI_CONTENT_5GNAS_SM_ID;
sendmsg.part[0].content_type = (char *)OGS_SBI_CONTENT_5GNAS_TYPE;
sendmsg.part[0].pkbuf = n1smbuf;
sendmsg.num_of_part = 1;
}
response = ogs_sbi_build_response(&sendmsg, problem.status);
ogs_assert(response);
ogs_assert(true == ogs_sbi_server_send_response(stream, response));
smf_metrics_inst_by_cause_add(problem.status,
SMF_METR_CTR_SM_PDUSESSIONCREATIONFAIL, 1);
if (n1smbuf)
ogs_pkbuf_free(n1smbuf);
}
void smf_sbi_send_sm_context_updated_data(
smf_sess_t *sess, ogs_sbi_stream_t *stream,
OpenAPI_up_cnx_state_e up_cnx_state,
OpenAPI_ho_state_e ho_state,
ogs_pkbuf_t *n1smbuf,
OpenAPI_n2_sm_info_type_e n2type, ogs_pkbuf_t *n2smbuf)
{
int i;
ogs_sbi_message_t sendmsg;
ogs_sbi_response_t *response = NULL;
OpenAPI_sm_context_updated_data_t SmContextUpdatedData;
OpenAPI_ref_to_binary_data_t n1SmMsg;
OpenAPI_ref_to_binary_data_t n2SmInfo;
ogs_assert(sess);
ogs_assert(stream);
ogs_assert(up_cnx_state != OpenAPI_up_cnx_state_NULL ||
ho_state != OpenAPI_ho_state_NULL ||
n1smbuf || n2smbuf);
memset(&sendmsg, 0, sizeof(sendmsg));
memset(&SmContextUpdatedData, 0, sizeof(SmContextUpdatedData));
/* up_cnx_state */
SmContextUpdatedData.up_cnx_state = up_cnx_state;
/* ho_state */
SmContextUpdatedData.ho_state = ho_state;
/* n1smbuf */
if (n1smbuf) {
n1SmMsg.content_id = (char *)OGS_SBI_CONTENT_5GNAS_SM_ID;
SmContextUpdatedData.n1_sm_msg = &n1SmMsg;
sendmsg.part[sendmsg.num_of_part].content_id =
(char *)OGS_SBI_CONTENT_5GNAS_SM_ID;
sendmsg.part[sendmsg.num_of_part].content_type =
(char *)OGS_SBI_CONTENT_5GNAS_TYPE;
sendmsg.part[sendmsg.num_of_part].pkbuf = n1smbuf;
sendmsg.num_of_part++;
}
/* n2smbuf */
if (n2smbuf) {
ogs_assert(n2type);
SmContextUpdatedData.n2_sm_info_type = n2type;
n2SmInfo.content_id = (char *)OGS_SBI_CONTENT_NGAP_SM_ID;
SmContextUpdatedData.n2_sm_info = &n2SmInfo;
sendmsg.part[sendmsg.num_of_part].content_id =
(char *)OGS_SBI_CONTENT_NGAP_SM_ID;
sendmsg.part[sendmsg.num_of_part].content_type =
(char *)OGS_SBI_CONTENT_NGAP_TYPE;
sendmsg.part[sendmsg.num_of_part].pkbuf = n2smbuf;
sendmsg.num_of_part++;
}
sendmsg.SmContextUpdatedData = &SmContextUpdatedData;
response = ogs_sbi_build_response(&sendmsg, OGS_SBI_HTTP_STATUS_OK);
ogs_assert(response);
ogs_assert(true == ogs_sbi_server_send_response(stream, response));
for (i = 0; i < sendmsg.num_of_part; i++)
ogs_pkbuf_free(sendmsg.part[i].pkbuf);
}
void smf_sbi_send_sm_context_update_error(
ogs_sbi_stream_t *stream,
int status, ogs_sbi_app_errno_e err,
const char *title, const char *detail,
ogs_pkbuf_t *n1smbuf, ogs_pkbuf_t *n2smbuf,
OpenAPI_n2_sm_info_type_e n2_sm_info_type,
OpenAPI_up_cnx_state_e up_cnx_state)
{
ogs_sbi_message_t sendmsg;
ogs_sbi_response_t *response = NULL;
OpenAPI_sm_context_update_error_t SmContextUpdateError;
OpenAPI_ext_problem_details_t problem;
OpenAPI_ref_to_binary_data_t n1SmMsg;
OpenAPI_ref_to_binary_data_t n2SmInfo;
ogs_assert(stream);
memset(&problem, 0, sizeof(problem));
if (status) {
problem.is_status = true;
problem.status = status;
}
problem.title = (char*)title;
problem.detail = (char*)detail;
if (err > OGS_SBI_APP_ERRNO_NULL && err < OGS_SBI_MAX_NUM_OF_APP_ERRNO)
problem.cause = (char*)ogs_sbi_app_strerror(err);
memset(&sendmsg, 0, sizeof(sendmsg));
sendmsg.SmContextUpdateError = &SmContextUpdateError;
memset(&SmContextUpdateError, 0, sizeof(SmContextUpdateError));
SmContextUpdateError.error = &problem;
if (n1smbuf) {
SmContextUpdateError.n1_sm_msg = &n1SmMsg;
n1SmMsg.content_id = (char *)OGS_SBI_CONTENT_5GNAS_SM_ID;
sendmsg.part[sendmsg.num_of_part].content_id =
(char *)OGS_SBI_CONTENT_5GNAS_SM_ID;
sendmsg.part[sendmsg.num_of_part].content_type =
(char *)OGS_SBI_CONTENT_5GNAS_TYPE;
sendmsg.part[sendmsg.num_of_part].pkbuf = n1smbuf;
sendmsg.num_of_part++;
}
if (n2smbuf) {
SmContextUpdateError.n2_sm_info = &n2SmInfo;
n2SmInfo.content_id = (char *)OGS_SBI_CONTENT_NGAP_SM_ID;
sendmsg.part[sendmsg.num_of_part].content_id =
(char *)OGS_SBI_CONTENT_NGAP_SM_ID;
sendmsg.part[sendmsg.num_of_part].content_type =
(char *)OGS_SBI_CONTENT_NGAP_TYPE;
sendmsg.part[sendmsg.num_of_part].pkbuf = n2smbuf;
sendmsg.num_of_part++;
}
SmContextUpdateError.n2_sm_info_type = n2_sm_info_type;
SmContextUpdateError.up_cnx_state = up_cnx_state;
response = ogs_sbi_build_response(&sendmsg, problem.status);
ogs_assert(response);
ogs_assert(true == ogs_sbi_server_send_response(stream, response));
if (n1smbuf)
ogs_pkbuf_free(n1smbuf);
if (n2smbuf)
ogs_pkbuf_free(n2smbuf);
}
static int client_notify_cb(
int status, ogs_sbi_response_t *response, void *data)
{
int rv;
ogs_sbi_message_t message;
if (status != OGS_OK) {
ogs_log_message(
status == OGS_DONE ? OGS_LOG_DEBUG : OGS_LOG_WARN, 0,
"client_notify_cb() failed [%d]", status);
return OGS_ERROR;
}
ogs_assert(response);
rv = ogs_sbi_parse_response(&message, response);
if (rv != OGS_OK) {
ogs_error("cannot parse HTTP response");
ogs_sbi_message_free(&message);
ogs_sbi_response_free(response);
return OGS_ERROR;
}
if (message.res_status != OGS_SBI_HTTP_STATUS_NO_CONTENT)
ogs_error("SmContextStatusNotification failed [%d]",
message.res_status);
ogs_sbi_message_free(&message);
ogs_sbi_response_free(response);
return OGS_OK;
}
bool smf_sbi_send_sm_context_status_notify(smf_sess_t *sess)
{
bool rc;
ogs_sbi_request_t *request = NULL;
ogs_sbi_client_t *client = NULL;
ogs_assert(sess);
client = sess->namf.client;
ogs_assert(client);
request = smf_namf_callback_build_sm_context_status(sess, NULL);
if (!request) {
ogs_error("smf_namf_callback_build_sm_context_status() failed");
return false;
}
rc = ogs_sbi_send_request_to_client(
client, client_notify_cb, request, NULL);
ogs_expect(rc == true);
ogs_sbi_request_free(request);
return rc;
}
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