273 lines
9.8 KiB
C
273 lines
9.8 KiB
C
/*
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* Copyright (C) 2019 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 nrf_state_initial(ogs_fsm_t *s, nrf_event_t *e)
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{
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nrf_sm_debug(e);
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ogs_assert(s);
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OGS_FSM_TRAN(s, &nrf_state_operational);
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}
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void nrf_state_final(ogs_fsm_t *s, nrf_event_t *e)
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{
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nrf_sm_debug(e);
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ogs_assert(s);
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}
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void nrf_state_operational(ogs_fsm_t *s, nrf_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_message_t message;
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ogs_sbi_nf_instance_t *nf_instance = NULL;
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ogs_sbi_subscription_data_t *subscription_data = NULL;
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ogs_assert(e);
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nrf_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 NRF_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_INSTANCES)
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SWITCH(message.h.method)
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CASE(OGS_SBI_HTTP_METHOD_GET)
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if (message.h.resource.component[1]) {
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nrf_nnrf_handle_nf_profile_retrieval(stream, &message);
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} else {
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nrf_nnrf_handle_nf_list_retrieval(stream, &message);
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}
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break;
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DEFAULT
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nf_instance = ogs_sbi_nf_instance_find(
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message.h.resource.component[1]);
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if (!nf_instance) {
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SWITCH(message.h.method)
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CASE(OGS_SBI_HTTP_METHOD_PUT)
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if (ogs_sbi_nf_instance_maximum_number_is_reached())
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{
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ogs_warn("Can't add instance [%s] "
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"due to insufficient space",
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message.h.resource.component[1]);
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ogs_assert(
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true ==
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ogs_sbi_server_send_error(
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stream,
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OGS_SBI_HTTP_STATUS_PAYLOAD_TOO_LARGE,
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&message, "Insufficient space",
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message.h.resource.component[1]));
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break;
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}
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nf_instance = ogs_sbi_nf_instance_add();
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ogs_assert(nf_instance);
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ogs_sbi_nf_instance_set_id(nf_instance,
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message.h.resource.component[1]);
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nrf_nf_fsm_init(nf_instance);
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break;
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DEFAULT
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ogs_warn("Not found [%s]",
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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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END
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}
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if (nf_instance) {
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e->nf_instance = 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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if (OGS_FSM_CHECK(&nf_instance->sm,
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nrf_nf_state_de_registered)) {
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nrf_nf_fsm_fini(nf_instance);
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ogs_sbi_nf_instance_remove(nf_instance);
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} else if (OGS_FSM_CHECK(&nf_instance->sm,
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nrf_nf_state_exception)) {
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ogs_error("[%s] State machine exception",
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nf_instance->id);
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ogs_sbi_message_free(&message);
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nrf_nf_fsm_fini(nf_instance);
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ogs_sbi_nf_instance_remove(nf_instance);
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}
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}
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END
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break;
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CASE(OGS_SBI_RESOURCE_NAME_SUBSCRIPTIONS)
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SWITCH(message.h.method)
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CASE(OGS_SBI_HTTP_METHOD_POST)
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nrf_nnrf_handle_nf_status_subscribe(stream, &message);
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break;
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CASE(OGS_SBI_HTTP_METHOD_DELETE)
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nrf_nnrf_handle_nf_status_unsubscribe(stream, &message);
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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(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_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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SWITCH(message.h.method)
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CASE(OGS_SBI_HTTP_METHOD_GET)
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nrf_nnrf_handle_nf_discover(stream, &message);
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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(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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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.resource.component[0]));
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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 NRF_EVT_SBI_TIMER:
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switch(e->timer_id) {
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case NRF_TIMER_NF_INSTANCE_NO_HEARTBEAT:
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nf_instance = e->nf_instance;
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ogs_assert(nf_instance);
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ogs_warn("[%s] No heartbeat", nf_instance->id);
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nf_instance->nf_status = OpenAPI_nf_status_SUSPENDED;
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nrf_nf_fsm_fini(nf_instance);
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ogs_sbi_nf_instance_remove(nf_instance);
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/* FIXME : Remove unnecessary Client */
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break;
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case NRF_TIMER_SUBSCRIPTION_VALIDITY:
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subscription_data = e->subscription_data;
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ogs_assert(subscription_data);
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ogs_info("[%s] Subscription validity expired",
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subscription_data->id);
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ogs_sbi_subscription_data_remove(subscription_data);
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break;
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default:
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ogs_error("Unknown timer[%s:%d]",
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nrf_timer_get_name(e->timer_id), e->timer_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", nrf_event_get_name(e));
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break;
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}
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}
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