475 lines
17 KiB
C
475 lines
17 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 "nbsf-handler.h"
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#include "npcf-handler.h"
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void af_state_initial(ogs_fsm_t *s, af_event_t *e)
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{
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af_sm_debug(e);
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ogs_assert(s);
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OGS_FSM_TRAN(s, &af_state_operational);
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}
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void af_state_final(ogs_fsm_t *s, af_event_t *e)
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{
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af_sm_debug(e);
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ogs_assert(s);
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}
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void af_state_operational(ogs_fsm_t *s, af_event_t *e)
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{
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int rv;
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af_sess_t *sess = NULL;
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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_xact_t *sbi_xact = NULL;
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af_sm_debug(e);
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ogs_assert(s);
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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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request = e->h.sbi.request;
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ogs_assert(request);
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stream = e->h.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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/* 'sbi_message' buffer is released in ogs_sbi_parse_request() */
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ogs_error("cannot parse HTTP sbi_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 sbi_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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ogs_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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"Invalid 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_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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af_sess_t *app_session = NULL;
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if (!message.h.resource.component[1]) {
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ogs_error("[%s] Unknown app session id",
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message.h.resource.component[1]);
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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",
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message.h.resource.component[1]));
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break;
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}
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app_session = af_sess_find_by_af_app_session_id(
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message.h.resource.component[1]);
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if (!app_session) {
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ogs_error("[%s] Unknown app session id",
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message.h.resource.component[1]);
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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",
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message.h.resource.component[1]));
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break;
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}
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SWITCH(message.h.resource.component[2])
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CASE(OGS_SBI_RESOURCE_NAME_TERMINATE)
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ogs_assert(true ==
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ogs_sbi_send_http_status_no_content(stream));
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af_sess_remove(app_session);
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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[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",
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message.h.resource.component[2]));
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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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"Invalid 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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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 OGS_EVENT_SBI_CLIENT:
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ogs_assert(e);
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response = e->h.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->h.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->h.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->h.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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ogs_nnrf_handle_nf_status_subscribe(
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subscription, &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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}
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break;
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CASE(OGS_SBI_HTTP_METHOD_DELETE)
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if (message.res_status == 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("HTTP response error : %d",
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message.res_status);
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}
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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_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->h.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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af_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_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->h.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 = (af_sess_t *)sbi_xact->sbi_object;
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ogs_assert(sess);
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ogs_sbi_xact_remove(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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af_nbsf_management_handle_pcf_binding(sess, &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_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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sess = e->h.sbi.data;
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ogs_assert(sess);
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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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af_sess_remove(sess);
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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[2]);
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ogs_assert_if_reached();
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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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if (message.res_status == OGS_SBI_HTTP_STATUS_OK)
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af_npcf_policyauthorization_handle_update(
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sess, &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]",
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message.h.method);
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ogs_assert_if_reached();
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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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if (message.res_status == OGS_SBI_HTTP_STATUS_CREATED)
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af_npcf_policyauthorization_handle_create(
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sess, &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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}
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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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DEFAULT
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ogs_error("Invalid service name [%s]", message.h.service.name);
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ogs_assert_if_reached();
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END
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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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case OGS_EVENT_SBI_TIMER:
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ogs_assert(e);
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switch(e->h.timer_id) {
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case OGS_TIMER_NF_INSTANCE_REGISTRATION_INTERVAL:
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case OGS_TIMER_NF_INSTANCE_HEARTBEAT_INTERVAL:
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case OGS_TIMER_NF_INSTANCE_NO_HEARTBEAT:
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case OGS_TIMER_NF_INSTANCE_VALIDITY:
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nf_instance = e->h.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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ogs_fsm_dispatch(&nf_instance->sm, e);
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if (OGS_FSM_CHECK(&nf_instance->sm, ogs_sbi_nf_state_exception))
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ogs_error("State machine exception [%d]", e->h.timer_id);
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break;
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case OGS_TIMER_SUBSCRIPTION_VALIDITY:
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subscription = e->h.sbi.data;
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ogs_assert(subscription);
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ogs_assert(ogs_sbi_self()->nf_instance);
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ogs_assert(true ==
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ogs_nnrf_nfm_send_nf_status_subscribe(subscription->client,
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ogs_sbi_self()->nf_instance->nf_type,
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subscription->req_nf_instance_id,
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subscription->subscr_cond.nf_type));
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ogs_info("Subscription validity expired [%s]", subscription->id);
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ogs_sbi_subscription_remove(subscription);
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break;
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case OGS_TIMER_SBI_CLIENT_WAIT:
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sbi_xact = e->h.sbi.data;
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ogs_assert(sbi_xact);
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stream = sbi_xact->assoc_stream;
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/* Here, we should not use ogs_assert(stream)
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* since 'namf-comm' service has no an associated stream. */
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ogs_sbi_xact_remove(sbi_xact);
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ogs_error("Cannot receive SBI message");
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if (stream) {
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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_GATEWAY_TIMEOUT, NULL,
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"Cannot receive SBI message", NULL));
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}
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break;
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default:
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ogs_error("Unknown timer[%s:%d]",
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ogs_timer_get_name(e->h.timer_id), e->h.timer_id);
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}
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break;
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case AF_EVENT_SBI_LOCAL:
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ogs_assert(e);
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switch(e->local_id) {
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case AF_LOCAL_DISCOVER_AND_SEND:
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af_sbi_discover_and_send(e->local.service_type, NULL,
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e->local.build, e->sess, e->local.data);
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break;
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case AF_LOCAL_SEND_TO_PCF:
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af_sbi_send_to_pcf(e->sess, e->local.data, e->local.build);
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break;
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default:
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ogs_error("Unknown local[%s:%d]",
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af_local_get_name(e->local_id), e->local_id);
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}
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break;
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default:
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ogs_error("No handler for event %s", af_event_get_name(e));
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break;
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}
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}
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