forked from acouzens/open5gs
373 lines
14 KiB
C
373 lines
14 KiB
C
/*
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* Copyright (C) 2019-2022 by Sukchan Lee <acetcom@gmail.com>
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*
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* This file is part of Open5GS.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "sbi-path.h"
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#include "nnrf-handler.h"
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#include "npcf-handler.h"
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#include "nudr-handler.h"
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#include "nbsf-handler.h"
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void pcf_sm_state_initial(ogs_fsm_t *s, pcf_event_t *e)
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{
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ogs_assert(s);
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OGS_FSM_TRAN(s, &pcf_sm_state_operational);
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}
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void pcf_sm_state_final(ogs_fsm_t *s, pcf_event_t *e)
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{
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}
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void pcf_sm_state_operational(ogs_fsm_t *s, pcf_event_t *e)
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{
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bool handled;
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pcf_ue_t *pcf_ue = NULL;
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pcf_sess_t *sess = NULL;
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ogs_sbi_stream_t *stream = NULL;
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ogs_sbi_message_t *message = NULL;
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ogs_assert(s);
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ogs_assert(e);
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pcf_sm_debug(e);
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sess = e->sess;
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ogs_assert(sess);
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pcf_ue = sess->pcf_ue;
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ogs_assert(pcf_ue);
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switch (e->h.id) {
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case OGS_FSM_ENTRY_SIG:
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break;
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case OGS_FSM_EXIT_SIG:
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break;
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case OGS_EVENT_SBI_SERVER:
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message = e->h.sbi.message;
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ogs_assert(message);
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stream = e->h.sbi.data;
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ogs_assert(stream);
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SWITCH(message->h.service.name)
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CASE(OGS_SBI_SERVICE_NAME_NPCF_SMPOLICYCONTROL)
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if (!message->h.resource.component[1]) {
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handled = pcf_npcf_smpolicycontrol_handle_create(
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sess, stream, message);
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if (!handled) {
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ogs_error("[%s:%d] "
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"pcf_npcf_smpolicycontrol_handle_create() failed",
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pcf_ue->supi, sess->psi);
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OGS_FSM_TRAN(s, pcf_sm_state_exception);
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}
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} else {
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SWITCH(message->h.resource.component[2])
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CASE(OGS_SBI_RESOURCE_NAME_DELETE)
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handled = pcf_npcf_smpolicycontrol_handle_delete(
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sess, stream, message);
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if (!handled) {
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ogs_error("[%s:%d] "
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"pcf_npcf_smpolicycontrol_handle_delete() failed",
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pcf_ue->supi, sess->psi);
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OGS_FSM_TRAN(s, pcf_sm_state_exception);
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}
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break;
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DEFAULT
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ogs_error("[%s:%d] Invalid HTTP URI [%s]",
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pcf_ue->supi, sess->psi, message->h.uri);
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ogs_assert(true ==
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ogs_sbi_server_send_error(stream,
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OGS_SBI_HTTP_STATUS_METHOD_NOT_ALLOWED, message,
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"Invalid HTTP method", message->h.uri, NULL));
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END
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}
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break;
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CASE(OGS_SBI_SERVICE_NAME_NPCF_POLICYAUTHORIZATION)
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if (message->h.resource.component[1]) {
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if (message->h.resource.component[2]) {
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SWITCH(message->h.resource.component[2])
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CASE(OGS_SBI_RESOURCE_NAME_DELETE)
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handled = pcf_npcf_policyauthorization_handle_delete(
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sess, e->app, stream, message);
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break;
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DEFAULT
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ogs_error("[%s:%d] Invalid resource name [%s]",
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pcf_ue->supi, sess->psi,
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message->h.resource.component[2]);
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ogs_assert(true ==
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ogs_sbi_server_send_error(stream,
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OGS_SBI_HTTP_STATUS_BAD_REQUEST, message,
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"Invalid resource name", message->h.uri, NULL));
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END
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} else {
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SWITCH(message->h.method)
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CASE(OGS_SBI_HTTP_METHOD_PATCH)
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handled = pcf_npcf_policyauthorization_handle_update(
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sess, e->app, stream, message);
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break;
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DEFAULT
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ogs_error("[%s:%d] Unknown method [%s]",
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pcf_ue->supi, sess->psi, message->h.method);
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ogs_assert(true ==
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ogs_sbi_server_send_error(stream,
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OGS_SBI_HTTP_STATUS_METHOD_NOT_ALLOWED, message,
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"Invalid HTTP method", message->h.uri, NULL));
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END
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}
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} else {
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SWITCH(message->h.method)
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CASE(OGS_SBI_HTTP_METHOD_POST)
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handled = pcf_npcf_policyauthorization_handle_create(
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sess, stream, message);
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break;
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DEFAULT
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ogs_error("[%s:%d] Unknown method [%s]",
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pcf_ue->supi, sess->psi, message->h.method);
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ogs_assert(true ==
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ogs_sbi_server_send_error(stream,
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OGS_SBI_HTTP_STATUS_METHOD_NOT_ALLOWED, message,
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"Invalid HTTP method", message->h.uri, NULL));
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END
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}
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break;
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DEFAULT
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ogs_error("[%s:%d] Invalid API name [%s]",
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pcf_ue->supi, sess->psi, message->h.service.name);
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ogs_assert_if_reached();
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END
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break;
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case OGS_EVENT_SBI_CLIENT:
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message = e->h.sbi.message;
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ogs_assert(message);
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stream = e->h.sbi.data;
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ogs_assert(stream);
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SWITCH(message->h.service.name)
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CASE(OGS_SBI_SERVICE_NAME_NUDR_DR)
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SWITCH(message->h.resource.component[0])
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CASE(OGS_SBI_RESOURCE_NAME_POLICY_DATA)
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SWITCH(message->h.resource.component[1])
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CASE(OGS_SBI_RESOURCE_NAME_UES)
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if (message->res_status != OGS_SBI_HTTP_STATUS_OK &&
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message->res_status != OGS_SBI_HTTP_STATUS_NO_CONTENT) {
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if (message->res_status ==
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OGS_SBI_HTTP_STATUS_NOT_FOUND) {
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ogs_warn("[%s:%d] Cannot find SUPI [%d]",
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pcf_ue->supi, sess->psi, message->res_status);
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/*
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* TS29.512
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* 4.2.2.2 SM Policy Association establishment
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*
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* If the user information received within the "supi"
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* attribute is unknown, the PCF shall reject the
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* request with an HTTP "400 Bad Request" response
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* message including the "cause" attribute of the
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* ProblemDetails data structure set to "USER_UNKNOWN".
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*/
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ogs_assert(true ==
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ogs_sbi_server_send_error(
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stream, OGS_SBI_HTTP_STATUS_BAD_REQUEST,
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NULL, "End user is unknown to the PCF",
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pcf_ue->supi, "USER_UNKNOWN"));
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} else {
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ogs_error("[%s:%d] HTTP response error [%d]",
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pcf_ue->supi, sess->psi, message->res_status);
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/*
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* TS29.512
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* 4.2.2.2 SM Policy Association establishment
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*
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* If the PCF, based on local configuration and/or
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* operator policies, denies the creation of the
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* Individual SM Policy resource, the PCF may reject
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* the request and include in an HTTP "403 Forbidden"
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* response message the "cause" attribute of the
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* ProblemDetails data structure set to
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* "POLICY_CONTEXT_DENIED".
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*/
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ogs_assert(true ==
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ogs_sbi_server_send_error(
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stream, OGS_SBI_HTTP_STATUS_FORBIDDEN,
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NULL, "HTTP response error",
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pcf_ue->supi, "POLICY_CONTEXT_DENIED"));
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}
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break;
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}
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pcf_nudr_dr_handle_query_sm_data(sess, stream, message);
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break;
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DEFAULT
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ogs_error("[%s:%d] Invalid resource name [%s]",
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pcf_ue->supi, sess->psi,
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message->h.resource.component[1]);
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ogs_assert_if_reached();
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END
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break;
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DEFAULT
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ogs_error("[%s:%d] Invalid resource name [%s]",
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pcf_ue->supi, sess->psi,
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message->h.resource.component[0]);
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ogs_assert_if_reached();
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END
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break;
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CASE(OGS_SBI_SERVICE_NAME_NBSF_MANAGEMENT)
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SWITCH(message->h.resource.component[0])
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CASE(OGS_SBI_RESOURCE_NAME_PCF_BINDINGS)
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if (message->h.resource.component[1]) {
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SWITCH(message->h.method)
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CASE(OGS_SBI_HTTP_METHOD_DELETE)
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if (message->res_status !=
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OGS_SBI_HTTP_STATUS_NO_CONTENT) {
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ogs_warn("[%s:%d] HTTP response error [%d]",
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pcf_ue->supi, sess->psi, message->res_status);
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/*
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* The PCfBindings resource for that UE may not exist in the BSF
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* for reasons such as restarting the BSF.
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*
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* So, session Release continues even if there is no resource in BSF.
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*/
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#if 0
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ogs_assert(true ==
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ogs_sbi_server_send_error(stream,
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message->res_status,
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NULL, "HTTP response error", pcf_ue->supi));
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OGS_FSM_TRAN(s, pcf_sm_state_exception);
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break;
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#endif
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}
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pcf_nbsf_management_handle_de_register(
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sess, stream, message);
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OGS_FSM_TRAN(s, pcf_sm_state_deleted);
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break;
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DEFAULT
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ogs_error("[%s:%d] Unknown method [%s]",
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pcf_ue->supi, sess->psi, message->h.method);
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ogs_assert_if_reached();
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END
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break;
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} else {
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SWITCH(message->h.method)
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CASE(OGS_SBI_HTTP_METHOD_POST)
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pcf_nbsf_management_handle_register(
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sess, stream, message);
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break;
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DEFAULT
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ogs_error("[%s:%d] Unknown method [%s]",
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pcf_ue->supi, sess->psi, message->h.method);
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ogs_assert_if_reached();
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END
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}
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break;
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DEFAULT
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ogs_error("[%s:%d] Invalid resource name [%s]",
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pcf_ue->supi, sess->psi,
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message->h.resource.component[0]);
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ogs_assert_if_reached();
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END
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break;
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DEFAULT
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ogs_error("[%s:%d] Invalid API name [%s]",
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pcf_ue->supi, sess->psi, message->h.service.name);
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ogs_assert_if_reached();
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END
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break;
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default:
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ogs_error("[%s:%d] Unknown event %s",
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pcf_ue->supi, sess->psi, pcf_event_get_name(e));
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break;
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}
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}
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void pcf_sm_state_deleted(ogs_fsm_t *s, pcf_event_t *e)
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{
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pcf_ue_t *pcf_ue = NULL;
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pcf_sess_t *sess = NULL;
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ogs_assert(s);
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ogs_assert(e);
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pcf_sm_debug(e);
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sess = e->sess;
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ogs_assert(sess);
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pcf_ue = sess->pcf_ue;
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ogs_assert(pcf_ue);
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switch (e->h.id) {
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case OGS_FSM_ENTRY_SIG:
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ogs_assert(sess->pcf_ue);
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pcf_metrics_inst_by_slice_add(&sess->pcf_ue->guami.plmn_id,
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&sess->s_nssai, PCF_METR_GAUGE_PA_SESSIONNBR, -1);
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break;
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case OGS_FSM_EXIT_SIG:
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break;
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default:
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ogs_error("[%s:%d] Unknown event %s",
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pcf_ue->supi, sess->psi, pcf_event_get_name(e));
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break;
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}
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}
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void pcf_sm_state_exception(ogs_fsm_t *s, pcf_event_t *e)
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{
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pcf_ue_t *pcf_ue = NULL;
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pcf_sess_t *sess = NULL;
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ogs_assert(s);
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ogs_assert(e);
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pcf_sm_debug(e);
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sess = e->sess;
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ogs_assert(sess);
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pcf_ue = sess->pcf_ue;
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ogs_assert(pcf_ue);
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switch (e->h.id) {
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case OGS_FSM_ENTRY_SIG:
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ogs_assert(sess->pcf_ue);
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pcf_metrics_inst_by_slice_add(&sess->pcf_ue->guami.plmn_id,
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&sess->s_nssai, PCF_METR_GAUGE_PA_SESSIONNBR, -1);
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break;
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case OGS_FSM_EXIT_SIG:
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break;
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default:
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ogs_error("[%s:%d] Unknown event %s",
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pcf_ue->supi, sess->psi, pcf_event_get_name(e));
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break;
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}
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}
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