648 lines
23 KiB
C
648 lines
23 KiB
C
/*
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* Copyright (C) 2019,2020 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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void pcf_state_initial(ogs_fsm_t *s, pcf_event_t *e)
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{
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pcf_sm_debug(e);
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ogs_assert(s);
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OGS_FSM_TRAN(s, &pcf_state_operational);
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}
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void pcf_state_final(ogs_fsm_t *s, pcf_event_t *e)
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{
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pcf_sm_debug(e);
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}
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void pcf_state_operational(ogs_fsm_t *s, pcf_event_t *e)
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{
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int rv;
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ogs_sbi_stream_t *stream = NULL;
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ogs_sbi_request_t *request = NULL;
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ogs_sbi_nf_instance_t *nf_instance = NULL;
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ogs_sbi_subscription_t *subscription = NULL;
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ogs_sbi_response_t *response = NULL;
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ogs_sbi_message_t message;
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ogs_sbi_object_t *sbi_object = NULL;
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ogs_sbi_xact_t *sbi_xact = NULL;
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OpenAPI_nf_type_e target_nf_type = OpenAPI_nf_type_NULL;
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pcf_ue_t *pcf_ue = NULL;
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pcf_sess_t *sess = NULL;
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pcf_app_t *app_session = NULL;
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pcf_sm_debug(e);
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ogs_assert(s);
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switch (e->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 PCF_EVT_SBI_SERVER:
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request = e->sbi.request;
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ogs_assert(request);
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stream = e->sbi.data;
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ogs_assert(stream);
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rv = ogs_sbi_parse_request(&message, request);
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if (rv != OGS_OK) {
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/* 'message' buffer is released in ogs_sbi_parse_request() */
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ogs_error("cannot parse HTTP message");
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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, "cannot parse HTTP message", NULL));
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break;
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}
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if (strcmp(message.h.api.version, OGS_SBI_API_V1) != 0) {
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ogs_error("Not supported version [%s]", message.h.api.version);
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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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&message, "Not supported version", NULL));
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ogs_sbi_message_free(&message);
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break;
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}
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SWITCH(message.h.service.name)
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CASE(OGS_SBI_SERVICE_NAME_NNRF_NFM)
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SWITCH(message.h.resource.component[0])
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CASE(OGS_SBI_RESOURCE_NAME_NF_STATUS_NOTIFY)
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SWITCH(message.h.method)
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CASE(OGS_SBI_HTTP_METHOD_POST)
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pcf_nnrf_handle_nf_status_notify(stream, &message);
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break;
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DEFAULT
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ogs_error("Invalid HTTP method [%s]", 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_FORBIDDEN, &message,
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"Invalid HTTP method", message.h.method));
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END
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break;
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DEFAULT
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ogs_error("Invalid resource name [%s]",
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message.h.resource.component[0]);
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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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"Unknown resource name",
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message.h.resource.component[0]));
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END
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break;
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CASE(OGS_SBI_SERVICE_NAME_NPCF_AM_POLICY_CONTROL)
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SWITCH(message.h.method)
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CASE(OGS_SBI_HTTP_METHOD_POST)
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if (message.PolicyAssociationRequest &&
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message.PolicyAssociationRequest->supi) {
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pcf_ue = pcf_ue_find_by_supi(
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message.PolicyAssociationRequest->supi);
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if (!pcf_ue) {
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pcf_ue = pcf_ue_add(
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message.PolicyAssociationRequest->supi);
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ogs_assert(pcf_ue);
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}
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}
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break;
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CASE(OGS_SBI_HTTP_METHOD_DELETE)
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if (message.h.resource.component[1]) {
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pcf_ue = pcf_ue_find_by_association_id(
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message.h.resource.component[1]);
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} else {
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ogs_error("No Policy Association Id");
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}
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break;
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DEFAULT
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END
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if (!pcf_ue) {
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ogs_error("Not found [%s]", 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_NOT_FOUND,
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&message, "Not found", message.h.method));
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break;
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}
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ogs_assert(OGS_FSM_STATE(&pcf_ue->sm));
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e->pcf_ue = pcf_ue;
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e->sbi.message = &message;
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ogs_fsm_dispatch(&pcf_ue->sm, e);
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if (OGS_FSM_CHECK(&pcf_ue->sm, pcf_am_state_exception)) {
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ogs_error("[%s] State machine exception", pcf_ue->supi);
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pcf_ue_remove(pcf_ue);
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} else if (OGS_FSM_CHECK(&pcf_ue->sm, pcf_am_state_deleted)) {
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ogs_debug("[%s] PCF-AM removed", pcf_ue->supi);
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pcf_ue_remove(pcf_ue);
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}
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break;
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CASE(OGS_SBI_SERVICE_NAME_NPCF_SMPOLICYCONTROL)
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SWITCH(message.h.resource.component[0])
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CASE(OGS_SBI_RESOURCE_NAME_SM_POLICIES)
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if (!message.h.resource.component[1]) {
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if (message.SmPolicyContextData &&
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message.SmPolicyContextData->supi) {
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pcf_ue = pcf_ue_find_by_supi(
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message.SmPolicyContextData->supi);
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if (pcf_ue) {
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if (message.SmPolicyContextData->pdu_session_id) {
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sess = pcf_sess_find_by_psi(pcf_ue, message.
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SmPolicyContextData->pdu_session_id);
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if (!sess) {
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sess = pcf_sess_add(pcf_ue, message.
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SmPolicyContextData->pdu_session_id);
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ogs_assert(sess);
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ogs_debug("[%s:%d] PCF session added",
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pcf_ue->supi, sess->psi);
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}
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}
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}
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}
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} else {
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sess = pcf_sess_find_by_sm_policy_id(
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message.h.resource.component[1]);
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}
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break;
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DEFAULT
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END
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if (!sess) {
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ogs_error("Not found [%s]", 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_NOT_FOUND,
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&message, "Not found", message.h.uri));
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break;
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}
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ogs_assert(OGS_FSM_STATE(&sess->sm));
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e->sess = sess;
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e->sbi.message = &message;
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ogs_fsm_dispatch(&sess->sm, e);
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if (OGS_FSM_CHECK(&sess->sm, pcf_sm_state_exception)) {
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ogs_error("[%s:%d] State machine exception",
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pcf_ue->supi, sess->psi);
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pcf_sess_remove(sess);
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}
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break;
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CASE(OGS_SBI_SERVICE_NAME_NPCF_POLICYAUTHORIZATION)
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SWITCH(message.h.resource.component[0])
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CASE(OGS_SBI_RESOURCE_NAME_APP_SESSIONS)
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if (!message.h.resource.component[1]) {
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if (message.AppSessionContext &&
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message.AppSessionContext->asc_req_data &&
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(message.AppSessionContext->asc_req_data->ue_ipv4 ||
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message.AppSessionContext->asc_req_data->ue_ipv6)) {
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if (!sess &&
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message.AppSessionContext->asc_req_data->ue_ipv4)
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sess = pcf_sess_find_by_ipv4addr(message.
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AppSessionContext->asc_req_data->ue_ipv4);
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if (!sess &&
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message.AppSessionContext->asc_req_data->ue_ipv6)
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sess = pcf_sess_find_by_ipv6addr(message.
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AppSessionContext->asc_req_data->ue_ipv6);
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}
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} else {
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app_session = pcf_app_find_by_app_session_id(
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message.h.resource.component[1]);
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if (app_session)
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sess = app_session->sess;
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}
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break;
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DEFAULT
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END
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if (!sess) {
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ogs_error("Not found [%s]", 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_NOT_FOUND,
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&message, "Not found", message.h.uri));
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break;
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}
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ogs_assert(OGS_FSM_STATE(&sess->sm));
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e->sess = sess;
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e->app = app_session;
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e->sbi.message = &message;
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ogs_fsm_dispatch(&sess->sm, e);
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if (OGS_FSM_CHECK(&sess->sm, pcf_sm_state_exception)) {
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ogs_error("[%s:%d] State machine exception",
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pcf_ue->supi, sess->psi);
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pcf_sess_remove(sess);
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}
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break;
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DEFAULT
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ogs_error("Invalid API name [%s]", message.h.service.name);
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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 API name", message.h.service.name));
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END
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/* In lib/sbi/server.c, notify_completed() releases 'request' buffer. */
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ogs_sbi_message_free(&message);
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break;
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case PCF_EVT_SBI_CLIENT:
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ogs_assert(e);
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response = e->sbi.response;
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ogs_assert(response);
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rv = ogs_sbi_parse_response(&message, response);
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if (rv != OGS_OK) {
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ogs_error("cannot parse HTTP response");
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ogs_sbi_message_free(&message);
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ogs_sbi_response_free(response);
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break;
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}
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if (strcmp(message.h.api.version, OGS_SBI_API_V1) != 0) {
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ogs_error("Not supported version [%s]", message.h.api.version);
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ogs_sbi_message_free(&message);
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ogs_sbi_response_free(response);
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break;
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}
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SWITCH(message.h.service.name)
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CASE(OGS_SBI_SERVICE_NAME_NNRF_NFM)
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SWITCH(message.h.resource.component[0])
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CASE(OGS_SBI_RESOURCE_NAME_NF_INSTANCES)
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nf_instance = e->sbi.data;
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ogs_assert(nf_instance);
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ogs_assert(OGS_FSM_STATE(&nf_instance->sm));
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e->sbi.message = &message;
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ogs_fsm_dispatch(&nf_instance->sm, e);
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break;
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CASE(OGS_SBI_RESOURCE_NAME_SUBSCRIPTIONS)
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subscription = e->sbi.data;
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ogs_assert(subscription);
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SWITCH(message.h.method)
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CASE(OGS_SBI_HTTP_METHOD_POST)
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if (message.res_status == OGS_SBI_HTTP_STATUS_CREATED ||
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message.res_status == OGS_SBI_HTTP_STATUS_OK) {
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pcf_nnrf_handle_nf_status_subscribe(
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subscription, &message);
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} else {
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ogs_error("[%s] HTTP response error [%d]",
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subscription->id, message.res_status);
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}
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break;
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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_sbi_subscription_remove(subscription);
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} else {
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ogs_error("[%s] HTTP response error [%d]",
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subscription->id, message.res_status);
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}
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break;
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DEFAULT
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ogs_error("[%s] Invalid HTTP method [%s]",
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subscription->id, 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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DEFAULT
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ogs_error("Invalid resource name [%s]",
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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_NNRF_DISC)
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SWITCH(message.h.resource.component[0])
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CASE(OGS_SBI_RESOURCE_NAME_NF_INSTANCES)
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sbi_xact = e->sbi.data;
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ogs_assert(sbi_xact);
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SWITCH(message.h.method)
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CASE(OGS_SBI_HTTP_METHOD_GET)
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if (message.res_status == OGS_SBI_HTTP_STATUS_OK)
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pcf_nnrf_handle_nf_discover(sbi_xact, &message);
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else
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ogs_error("HTTP response error [%d]",
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message.res_status);
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break;
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DEFAULT
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ogs_error("Invalid HTTP method [%s]", 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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DEFAULT
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ogs_error("Invalid resource name [%s]",
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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_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[3])
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CASE(OGS_SBI_RESOURCE_NAME_AM_DATA)
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sbi_xact = e->sbi.data;
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ogs_assert(sbi_xact);
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sbi_xact = ogs_sbi_xact_cycle(sbi_xact);
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if (!sbi_xact) {
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/* CLIENT_WAIT timer could remove SBI transaction
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* before receiving SBI message */
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ogs_error("SBI transaction has already been removed");
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break;
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}
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pcf_ue = (pcf_ue_t *)sbi_xact->sbi_object;
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ogs_assert(pcf_ue);
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e->sbi.data = sbi_xact->assoc_stream;
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ogs_sbi_xact_remove(sbi_xact);
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pcf_ue = pcf_ue_cycle(pcf_ue);
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if (!pcf_ue) {
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ogs_error("UE(pcf_ue) Context "
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"has already been removed");
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break;
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}
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e->pcf_ue = pcf_ue;
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e->sbi.message = &message;
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ogs_fsm_dispatch(&pcf_ue->sm, e);
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if (OGS_FSM_CHECK(&pcf_ue->sm, pcf_am_state_exception)) {
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ogs_error("[%s] State machine exception", pcf_ue->supi);
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pcf_ue_remove(pcf_ue);
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}
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break;
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CASE(OGS_SBI_RESOURCE_NAME_SM_DATA)
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sbi_xact = e->sbi.data;
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ogs_assert(sbi_xact);
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sbi_xact = ogs_sbi_xact_cycle(sbi_xact);
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if (!sbi_xact) {
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/* CLIENT_WAIT timer could remove SBI transaction
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* before receiving SBI message */
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ogs_error("SBI transaction has already been removed");
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break;
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}
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sess = (pcf_sess_t *)sbi_xact->sbi_object;
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ogs_assert(sess);
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e->sbi.data = sbi_xact->assoc_stream;
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ogs_sbi_xact_remove(sbi_xact);
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sess = pcf_sess_cycle(sess);
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if (!sess) {
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ogs_error("Session has already been removed");
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break;
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}
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pcf_ue = sess->pcf_ue;
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ogs_assert(pcf_ue);
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pcf_ue = pcf_ue_cycle(pcf_ue);
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ogs_assert(pcf_ue);
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e->sess = sess;
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e->sbi.message = &message;
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ogs_fsm_dispatch(&sess->sm, e);
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if (OGS_FSM_CHECK(&sess->sm, pcf_sm_state_exception)) {
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ogs_error("[%s:%d] State machine exception",
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pcf_ue->supi, sess->psi);
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pcf_sess_remove(sess);
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}
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break;
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DEFAULT
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ogs_error("Invalid resource name [%s]",
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message.h.resource.component[3]);
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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("Invalid resource name [%s]",
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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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sbi_xact = e->sbi.data;
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ogs_assert(sbi_xact);
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sbi_xact = ogs_sbi_xact_cycle(sbi_xact);
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if (!sbi_xact) {
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/* CLIENT_WAIT timer could remove SBI transaction
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* before receiving SBI message */
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ogs_error("SBI transaction has already been removed");
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break;
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|
}
|
|
|
|
sess = (pcf_sess_t *)sbi_xact->sbi_object;
|
|
ogs_assert(sess);
|
|
|
|
e->sbi.data = sbi_xact->assoc_stream;
|
|
|
|
ogs_sbi_xact_remove(sbi_xact);
|
|
|
|
sess = pcf_sess_cycle(sess);
|
|
if (!sess) {
|
|
ogs_error("Session has already been removed");
|
|
break;
|
|
}
|
|
|
|
pcf_ue = sess->pcf_ue;
|
|
ogs_assert(pcf_ue);
|
|
pcf_ue = pcf_ue_cycle(pcf_ue);
|
|
ogs_assert(pcf_ue);
|
|
|
|
e->sess = sess;
|
|
e->sbi.message = &message;
|
|
|
|
ogs_fsm_dispatch(&sess->sm, e);
|
|
if (OGS_FSM_CHECK(&sess->sm, pcf_sm_state_exception)) {
|
|
ogs_error("[%s:%d] State machine exception",
|
|
pcf_ue->supi, sess->psi);
|
|
pcf_sess_remove(sess);
|
|
} else if (OGS_FSM_CHECK(&sess->sm, pcf_sm_state_deleted)) {
|
|
ogs_debug("[%s:%d] PCF session removed",
|
|
pcf_ue->supi, sess->psi);
|
|
pcf_sess_remove(sess);
|
|
}
|
|
break;
|
|
|
|
DEFAULT
|
|
ogs_error("Invalid resource name [%s]",
|
|
message.h.resource.component[0]);
|
|
ogs_assert_if_reached();
|
|
END
|
|
break;
|
|
|
|
DEFAULT
|
|
ogs_error("Invalid API name [%s]", message.h.service.name);
|
|
ogs_assert_if_reached();
|
|
END
|
|
|
|
ogs_sbi_message_free(&message);
|
|
ogs_sbi_response_free(response);
|
|
break;
|
|
|
|
case PCF_EVT_SBI_TIMER:
|
|
ogs_assert(e);
|
|
|
|
switch(e->timer_id) {
|
|
case PCF_TIMER_NF_INSTANCE_REGISTRATION_INTERVAL:
|
|
case PCF_TIMER_NF_INSTANCE_HEARTBEAT_INTERVAL:
|
|
case PCF_TIMER_NF_INSTANCE_NO_HEARTBEAT:
|
|
case PCF_TIMER_NF_INSTANCE_VALIDITY:
|
|
nf_instance = e->sbi.data;
|
|
ogs_assert(nf_instance);
|
|
ogs_assert(OGS_FSM_STATE(&nf_instance->sm));
|
|
|
|
ogs_fsm_dispatch(&nf_instance->sm, e);
|
|
if (OGS_FSM_CHECK(&nf_instance->sm, pcf_nf_state_exception))
|
|
ogs_error("[%s:%s] State machine exception [%d]",
|
|
OpenAPI_nf_type_ToString(nf_instance->nf_type),
|
|
nf_instance->id, e->timer_id);
|
|
break;
|
|
|
|
case PCF_TIMER_SUBSCRIPTION_VALIDITY:
|
|
subscription = e->sbi.data;
|
|
ogs_assert(subscription);
|
|
|
|
ogs_assert(ogs_sbi_self()->nf_instance);
|
|
ogs_assert(true ==
|
|
ogs_nnrf_nfm_send_nf_status_subscribe(subscription->client,
|
|
ogs_sbi_self()->nf_instance->nf_type,
|
|
subscription->req_nf_instance_id,
|
|
subscription->subscr_cond.nf_type));
|
|
|
|
ogs_info("[%s] Subscription validity expired", subscription->id);
|
|
ogs_sbi_subscription_remove(subscription);
|
|
break;
|
|
|
|
case PCF_TIMER_SBI_CLIENT_WAIT:
|
|
sbi_xact = e->sbi.data;
|
|
ogs_assert(sbi_xact);
|
|
|
|
sbi_object = sbi_xact->sbi_object;
|
|
ogs_assert(sbi_object);
|
|
|
|
stream = sbi_xact->assoc_stream;
|
|
ogs_assert(stream);
|
|
|
|
target_nf_type = sbi_xact->target_nf_type;
|
|
|
|
ogs_sbi_xact_remove(sbi_xact);
|
|
|
|
ogs_assert(sbi_object->type > OGS_SBI_OBJ_BASE &&
|
|
sbi_object->type < OGS_SBI_OBJ_TOP);
|
|
|
|
switch(sbi_object->type) {
|
|
case OGS_SBI_OBJ_UE_TYPE:
|
|
pcf_ue = (pcf_ue_t *)sbi_object;
|
|
ogs_assert(pcf_ue);
|
|
pcf_ue = pcf_ue_cycle(pcf_ue);
|
|
if (!pcf_ue) {
|
|
ogs_error("UE(pcf_ue) has already been removed");
|
|
break;
|
|
}
|
|
ogs_error("[%s] Cannot receive SBI message", pcf_ue->supi);
|
|
break;
|
|
|
|
case OGS_SBI_OBJ_SESS_TYPE:
|
|
sess = (pcf_sess_t *)sbi_object;
|
|
ogs_assert(sess);
|
|
sess = pcf_sess_cycle(sess);
|
|
if (!sess) {
|
|
ogs_error("Session has already been removed");
|
|
break;
|
|
}
|
|
ogs_error("[%d] Cannot receive SBI message", sess->psi);
|
|
break;
|
|
|
|
default:
|
|
ogs_fatal("Not implemented [%s:%d]",
|
|
OpenAPI_nf_type_ToString(target_nf_type), sbi_object->type);
|
|
ogs_assert_if_reached();
|
|
}
|
|
|
|
ogs_error("Cannot receive SBI message");
|
|
ogs_assert(true ==
|
|
ogs_sbi_server_send_error(stream,
|
|
OGS_SBI_HTTP_STATUS_GATEWAY_TIMEOUT, NULL,
|
|
"Cannot receive SBI message", NULL));
|
|
break;
|
|
|
|
default:
|
|
ogs_error("Unknown timer[%s:%d]",
|
|
pcf_timer_get_name(e->timer_id), e->timer_id);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
ogs_error("No handler for event %s", pcf_event_get_name(e));
|
|
break;
|
|
}
|
|
}
|