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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 "sbi-path.h"
#include "nnrf-handler.h"
#include "npcf-handler.h"
#include "nudr-handler.h"
#include "nbsf-handler.h"
void pcf_sm_state_initial(ogs_fsm_t *s, pcf_event_t *e)
{
ogs_assert(s);
OGS_FSM_TRAN(s, &pcf_sm_state_operational);
}
void pcf_sm_state_final(ogs_fsm_t *s, pcf_event_t *e)
{
}
void pcf_sm_state_operational(ogs_fsm_t *s, pcf_event_t *e)
{
bool handled;
pcf_ue_t *pcf_ue = NULL;
pcf_sess_t *sess = NULL;
ogs_sbi_stream_t *stream = NULL;
ogs_pool_id_t stream_id;
ogs_sbi_message_t *message = NULL;
ogs_assert(s);
ogs_assert(e);
pcf_sm_debug(e);
sess = pcf_sess_find_by_id(e->sess_id);
ogs_assert(sess);
pcf_ue = pcf_ue_find_by_id(sess->pcf_ue_id);
ogs_assert(pcf_ue);
switch (e->h.id) {
case OGS_FSM_ENTRY_SIG:
break;
case OGS_FSM_EXIT_SIG:
break;
case OGS_EVENT_SBI_SERVER:
message = e->h.sbi.message;
ogs_assert(message);
stream_id = OGS_POINTER_TO_UINT(e->h.sbi.data);
ogs_assert(stream_id >= OGS_MIN_POOL_ID &&
stream_id <= OGS_MAX_POOL_ID);
stream = ogs_sbi_stream_find_by_id(stream_id);
if (!stream) {
ogs_error("STREAM has already been removed [%d]", stream_id);
break;
}
SWITCH(message->h.service.name)
CASE(OGS_SBI_SERVICE_NAME_NPCF_SMPOLICYCONTROL)
if (!message->h.resource.component[1]) {
handled = pcf_npcf_smpolicycontrol_handle_create(
sess, stream, message);
if (!handled) {
ogs_error("[%s:%d] "
"pcf_npcf_smpolicycontrol_handle_create() failed",
pcf_ue->supi, sess->psi);
OGS_FSM_TRAN(s, pcf_sm_state_exception);
}
} else {
SWITCH(message->h.resource.component[2])
CASE(OGS_SBI_RESOURCE_NAME_DELETE)
handled = pcf_npcf_smpolicycontrol_handle_delete(
sess, stream, message);
if (!handled) {
ogs_error("[%s:%d] "
"pcf_npcf_smpolicycontrol_handle_delete() failed",
pcf_ue->supi, sess->psi);
OGS_FSM_TRAN(s, pcf_sm_state_exception);
}
break;
DEFAULT
ogs_error("[%s:%d] Invalid HTTP URI [%s]",
pcf_ue->supi, sess->psi, message->h.uri);
ogs_assert(true ==
ogs_sbi_server_send_error(stream,
OGS_SBI_HTTP_STATUS_METHOD_NOT_ALLOWED, message,
"Invalid HTTP method", message->h.uri, NULL));
END
}
break;
CASE(OGS_SBI_SERVICE_NAME_NPCF_POLICYAUTHORIZATION)
if (message->h.resource.component[1]) {
if (message->h.resource.component[2]) {
SWITCH(message->h.resource.component[2])
CASE(OGS_SBI_RESOURCE_NAME_DELETE)
handled = pcf_npcf_policyauthorization_handle_delete(
sess, e->app, stream, message);
break;
DEFAULT
ogs_error("[%s:%d] Invalid resource name [%s]",
pcf_ue->supi, sess->psi,
message->h.resource.component[2]);
ogs_assert(true ==
ogs_sbi_server_send_error(stream,
OGS_SBI_HTTP_STATUS_BAD_REQUEST, message,
"Invalid resource name", message->h.uri, NULL));
END
} else {
SWITCH(message->h.method)
CASE(OGS_SBI_HTTP_METHOD_PATCH)
handled = pcf_npcf_policyauthorization_handle_update(
sess, e->app, stream, message);
break;
DEFAULT
ogs_error("[%s:%d] Unknown method [%s]",
pcf_ue->supi, sess->psi, message->h.method);
ogs_assert(true ==
ogs_sbi_server_send_error(stream,
OGS_SBI_HTTP_STATUS_METHOD_NOT_ALLOWED, message,
"Invalid HTTP method", message->h.uri, NULL));
END
}
} else {
SWITCH(message->h.method)
CASE(OGS_SBI_HTTP_METHOD_POST)
handled = pcf_npcf_policyauthorization_handle_create(
sess, stream, message);
break;
DEFAULT
ogs_error("[%s:%d] Unknown method [%s]",
pcf_ue->supi, sess->psi, message->h.method);
ogs_assert(true ==
ogs_sbi_server_send_error(stream,
OGS_SBI_HTTP_STATUS_METHOD_NOT_ALLOWED, message,
"Invalid HTTP method", message->h.uri, NULL));
END
}
break;
DEFAULT
ogs_error("[%s:%d] Invalid API name [%s]",
pcf_ue->supi, sess->psi, message->h.service.name);
ogs_assert_if_reached();
END
break;
case OGS_EVENT_SBI_CLIENT:
message = e->h.sbi.message;
ogs_assert(message);
stream_id = OGS_POINTER_TO_UINT(e->h.sbi.data);
ogs_assert(stream_id >= OGS_MIN_POOL_ID &&
stream_id <= OGS_MAX_POOL_ID);
stream = ogs_sbi_stream_find_by_id(stream_id);
if (!stream) {
ogs_error("STREAM has already been removed [%d]", stream_id);
break;
}
SWITCH(message->h.service.name)
CASE(OGS_SBI_SERVICE_NAME_NUDR_DR)
SWITCH(message->h.resource.component[0])
CASE(OGS_SBI_RESOURCE_NAME_POLICY_DATA)
SWITCH(message->h.resource.component[1])
CASE(OGS_SBI_RESOURCE_NAME_UES)
if (message->res_status != OGS_SBI_HTTP_STATUS_OK &&
message->res_status != OGS_SBI_HTTP_STATUS_NO_CONTENT) {
if (message->res_status ==
OGS_SBI_HTTP_STATUS_NOT_FOUND) {
ogs_warn("[%s:%d] Cannot find SUPI [%d]",
pcf_ue->supi, sess->psi, message->res_status);
/*
* TS29.512
* 4.2.2.2 SM Policy Association establishment
*
* If the user information received within the "supi"
* attribute is unknown, the PCF shall reject the
* request with an HTTP "400 Bad Request" response
* message including the "cause" attribute of the
* ProblemDetails data structure set to "USER_UNKNOWN".
*/
ogs_assert(true ==
ogs_sbi_server_send_error(
stream, OGS_SBI_HTTP_STATUS_BAD_REQUEST,
NULL, "End user is unknown to the PCF",
pcf_ue->supi, "USER_UNKNOWN"));
} else {
ogs_error("[%s:%d] HTTP response error [%d]",
pcf_ue->supi, sess->psi, message->res_status);
/*
* TS29.512
* 4.2.2.2 SM Policy Association establishment
*
* If the PCF, based on local configuration and/or
* operator policies, denies the creation of the
* Individual SM Policy resource, the PCF may reject
* the request and include in an HTTP "403 Forbidden"
* response message the "cause" attribute of the
* ProblemDetails data structure set to
* "POLICY_CONTEXT_DENIED".
*/
ogs_assert(true ==
ogs_sbi_server_send_error(
stream, OGS_SBI_HTTP_STATUS_FORBIDDEN,
NULL, "HTTP response error",
pcf_ue->supi, "POLICY_CONTEXT_DENIED"));
}
break;
}
pcf_nudr_dr_handle_query_sm_data(sess, stream, message);
break;
DEFAULT
ogs_error("[%s:%d] Invalid resource name [%s]",
pcf_ue->supi, sess->psi,
message->h.resource.component[1]);
ogs_assert_if_reached();
END
break;
DEFAULT
ogs_error("[%s:%d] Invalid resource name [%s]",
pcf_ue->supi, sess->psi,
message->h.resource.component[0]);
ogs_assert_if_reached();
END
break;
CASE(OGS_SBI_SERVICE_NAME_NBSF_MANAGEMENT)
SWITCH(message->h.resource.component[0])
CASE(OGS_SBI_RESOURCE_NAME_PCF_BINDINGS)
if (message->h.resource.component[1]) {
SWITCH(message->h.method)
CASE(OGS_SBI_HTTP_METHOD_DELETE)
if (message->res_status !=
OGS_SBI_HTTP_STATUS_NO_CONTENT) {
ogs_warn("[%s:%d] HTTP response error [%d]",
pcf_ue->supi, sess->psi, message->res_status);
/*
* The PCfBindings resource for that UE may not exist in the BSF
* for reasons such as restarting the BSF.
*
* So, session Release continues even if there is no resource in BSF.
*/
#if 0
ogs_assert(true ==
ogs_sbi_server_send_error(stream,
message->res_status,
NULL, "HTTP response error", pcf_ue->supi));
OGS_FSM_TRAN(s, pcf_sm_state_exception);
break;
#endif
}
pcf_nbsf_management_handle_de_register(
sess, stream, message);
OGS_FSM_TRAN(s, pcf_sm_state_deleted);
break;
DEFAULT
ogs_error("[%s:%d] Unknown method [%s]",
pcf_ue->supi, sess->psi, message->h.method);
ogs_assert_if_reached();
END
break;
} else {
SWITCH(message->h.method)
CASE(OGS_SBI_HTTP_METHOD_POST)
pcf_nbsf_management_handle_register(
sess, stream, message);
break;
DEFAULT
ogs_error("[%s:%d] Unknown method [%s]",
pcf_ue->supi, sess->psi, message->h.method);
ogs_assert_if_reached();
END
}
break;
DEFAULT
ogs_error("[%s:%d] Invalid resource name [%s]",
pcf_ue->supi, sess->psi,
message->h.resource.component[0]);
ogs_assert_if_reached();
END
break;
DEFAULT
ogs_error("[%s:%d] Invalid API name [%s]",
pcf_ue->supi, sess->psi, message->h.service.name);
ogs_assert_if_reached();
END
break;
default:
ogs_error("[%s:%d] Unknown event %s",
pcf_ue->supi, sess->psi, pcf_event_get_name(e));
break;
}
}
void pcf_sm_state_deleted(ogs_fsm_t *s, pcf_event_t *e)
{
pcf_ue_t *pcf_ue = NULL;
pcf_sess_t *sess = NULL;
ogs_assert(s);
ogs_assert(e);
pcf_sm_debug(e);
sess = pcf_sess_find_by_id(e->sess_id);
ogs_assert(sess);
pcf_ue = pcf_ue_find_by_id(sess->pcf_ue_id);
ogs_assert(pcf_ue);
switch (e->h.id) {
case OGS_FSM_ENTRY_SIG:
pcf_metrics_inst_by_slice_add(&pcf_ue->guami.plmn_id,
&sess->s_nssai, PCF_METR_GAUGE_PA_SESSIONNBR, -1);
break;
case OGS_FSM_EXIT_SIG:
break;
default:
ogs_error("[%s:%d] Unknown event %s",
pcf_ue->supi, sess->psi, pcf_event_get_name(e));
break;
}
}
void pcf_sm_state_exception(ogs_fsm_t *s, pcf_event_t *e)
{
pcf_ue_t *pcf_ue = NULL;
pcf_sess_t *sess = NULL;
ogs_assert(s);
ogs_assert(e);
pcf_sm_debug(e);
sess = pcf_sess_find_by_id(e->sess_id);
ogs_assert(sess);
pcf_ue = pcf_ue_find_by_id(sess->pcf_ue_id);
ogs_assert(pcf_ue);
switch (e->h.id) {
case OGS_FSM_ENTRY_SIG:
pcf_metrics_inst_by_slice_add(&pcf_ue->guami.plmn_id,
&sess->s_nssai, PCF_METR_GAUGE_PA_SESSIONNBR, -1);
break;
case OGS_FSM_EXIT_SIG:
break;
default:
ogs_error("[%s:%d] Unknown event %s",
pcf_ue->supi, sess->psi, pcf_event_get_name(e));
break;
}
}
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