forked from acouzens/open5gs
284 lines
8.7 KiB
C
284 lines
8.7 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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#include "nsmf-handler.h"
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#include "nudm-handler.h"
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#include "gsm-handler.h"
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#include "ngap-handler.h"
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#include "pfcp-path.h"
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void smf_gsm_state_initial(ogs_fsm_t *s, smf_event_t *e)
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{
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ogs_assert(s);
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OGS_FSM_TRAN(s, &smf_gsm_state_operational);
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}
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void smf_gsm_state_final(ogs_fsm_t *s, smf_event_t *e)
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{
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}
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void smf_gsm_state_operational(ogs_fsm_t *s, smf_event_t *e)
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{
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int rv;
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char *strerror = NULL;
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smf_ue_t *smf_ue = NULL;
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smf_sess_t *sess = NULL;
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ogs_pkbuf_t *pkbuf = NULL;
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ogs_nas_5gs_message_t *nas_message = NULL;
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ogs_sbi_stream_t *stream = NULL;
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ogs_sbi_message_t *sbi_message = NULL;
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ogs_assert(s);
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ogs_assert(e);
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smf_sm_debug(e);
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sess = e->sess;
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ogs_assert(sess);
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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 SMF_EVT_SBI_SERVER:
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sbi_message = e->sbi.message;
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ogs_assert(sbi_message);
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stream = e->sbi.data;
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ogs_assert(stream);
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SWITCH(sbi_message->h.service.name)
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CASE(OGS_SBI_SERVICE_NAME_NSMF_PDUSESSION)
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SWITCH(sbi_message->h.resource.component[2])
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CASE(OGS_SBI_RESOURCE_NAME_MODIFY)
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smf_nsmf_handle_update_sm_context(sess, stream, sbi_message);
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break;
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CASE(OGS_SBI_RESOURCE_NAME_RELEASE)
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smf_nsmf_handle_release_sm_context(sess, stream, sbi_message);
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break;
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DEFAULT
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smf_nsmf_handle_create_sm_context(sess, stream, sbi_message);
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break;
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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]", sbi_message->h.service.name);
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ogs_sbi_server_send_error(stream,
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OGS_SBI_HTTP_STATUS_BAD_REQUEST, sbi_message,
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"Invalid API name", sbi_message->h.service.name);
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END
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break;
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case SMF_EVT_SBI_CLIENT:
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sbi_message = e->sbi.message;
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ogs_assert(sbi_message);
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sess = e->sess;
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ogs_assert(sess);
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smf_ue = sess->smf_ue;
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ogs_assert(smf_ue);
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stream = e->sbi.data;
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ogs_assert(stream);
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SWITCH(sbi_message->h.service.name)
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CASE(OGS_SBI_SERVICE_NAME_NUDM_SDM)
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SWITCH(sbi_message->h.resource.component[1])
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CASE(OGS_SBI_RESOURCE_NAME_SM_DATA)
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if (sbi_message->res_status != OGS_SBI_HTTP_STATUS_OK) {
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ogs_error("[%s] HTTP response error [%d]",
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smf_ue->supi, sbi_message->res_status);
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ogs_sbi_server_send_error(
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stream, sbi_message->res_status,
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NULL, "HTTP response error", smf_ue->supi);
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break;
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}
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if (smf_nudm_sdm_handle_get(
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sess, stream, sbi_message) != true) {
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ogs_sbi_server_send_error(stream,
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OGS_SBI_HTTP_STATUS_INTERNAL_SERVER_ERROR,
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sbi_message, "HTTP response error", smf_ue->supi);
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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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sbi_message->h.resource.component[1]);
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ogs_sbi_server_send_error(stream,
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OGS_SBI_HTTP_STATUS_BAD_REQUEST, sbi_message,
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"Invalid resource name",
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sbi_message->h.resource.component[1]);
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END
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break;
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CASE(OGS_SBI_SERVICE_NAME_NAMF_COMM)
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SWITCH(sbi_message->h.resource.component[0])
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CASE(OGS_SBI_RESOURCE_NAME_UE_CONTEXTS)
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if (sbi_message->res_status != OGS_SBI_HTTP_STATUS_OK &&
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sbi_message->res_status != OGS_SBI_HTTP_STATUS_ACCEPTED) {
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ogs_error("[%s] HTTP response error [%d]",
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smf_ue->supi, sbi_message->res_status);
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break;
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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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sbi_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 API name [%s]", sbi_message->h.service.name);
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END
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break;
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case SMF_EVT_5GSM_MESSAGE:
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nas_message = e->nas.message;
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ogs_assert(nas_message);
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sess = e->sess;
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ogs_assert(sess);
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stream = e->sbi.data;
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ogs_assert(stream);
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smf_ue = sess->smf_ue;
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ogs_assert(smf_ue);
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switch (nas_message->gsm.h.message_type) {
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case OGS_NAS_5GS_PDU_SESSION_ESTABLISHMENT_REQUEST:
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rv = gsm_handle_pdu_session_establishment_request(sess, stream,
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&nas_message->gsm.pdu_session_establishment_request);
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if (rv != OGS_OK) {
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ogs_error("[%s:%d] Cannot handle NAS message",
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smf_ue->supi, sess->psi);
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OGS_FSM_TRAN(s, smf_gsm_state_exception);
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}
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break;
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case OGS_NAS_5GS_PDU_SESSION_RELEASE_REQUEST:
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smf_5gc_pfcp_send_session_deletion_request(
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sess, stream, OGS_PFCP_DELETE_TRIGGER_UE_REQUESTED);
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break;
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case OGS_NAS_5GS_PDU_SESSION_RELEASE_COMPLETE:
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smf_sbi_send_response(stream, OGS_SBI_HTTP_STATUS_NO_CONTENT);
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/*
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* Race condition for PDU session release complete
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* - CLIENT : /nsmf-pdusession/v1/sm-contexts/{smContextRef}/modify
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* - SERVER : /namf-callback/v1/{supi}/sm-context-status/{psi})
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*
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* smf_sbi_send_response(stream, OGS_SBI_HTTP_STATUS_NO_CONTENT);
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* smf_sbi_send_sm_context_status_notify(sess);
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*
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* When executed as above,
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* NOTIFY transmits first, and Modify's Response transmits later.
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*
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* Use the Release Timer to send Notify
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* later than Modify's Response.
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*/
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ogs_timer_start(sess->t_release_holding, ogs_time_from_msec(1));
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break;
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default:
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strerror = ogs_msprintf("Unknown message [%d]",
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nas_message->gsm.h.message_type);
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ogs_assert(strerror);
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ogs_error("%s", strerror);
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ogs_sbi_server_send_error(stream,
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OGS_SBI_HTTP_STATUS_BAD_REQUEST, NULL, strerror, NULL);
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ogs_free(strerror);
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break;
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}
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break;
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case SMF_EVT_NGAP_MESSAGE:
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sess = e->sess;
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ogs_assert(sess);
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stream = e->sbi.data;
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ogs_assert(stream);
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smf_ue = sess->smf_ue;
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ogs_assert(smf_ue);
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pkbuf = e->pkbuf;
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ogs_assert(pkbuf);
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ogs_assert(e->ngap.type);
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switch (e->ngap.type) {
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case OpenAPI_n2_sm_info_type_PDU_RES_SETUP_RSP:
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rv = ngap_handle_pdu_session_resource_setup_response_transfer(
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sess, stream, pkbuf);
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if (rv != OGS_OK) {
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ogs_error("[%s:%d] Cannot handle NGAP message",
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smf_ue->supi, sess->psi);
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OGS_FSM_TRAN(s, smf_gsm_state_exception);
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}
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break;
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case OpenAPI_n2_sm_info_type_PDU_RES_REL_RSP:
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smf_sbi_send_response(stream, OGS_SBI_HTTP_STATUS_NO_CONTENT);
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break;
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default:
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ogs_error("Unknown message[%d]", e->ngap.type);
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}
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break;
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default:
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ogs_error("Unknown event [%s]", smf_event_get_name(e));
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break;
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}
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}
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void smf_gsm_state_exception(ogs_fsm_t *s, smf_event_t *e)
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{
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smf_sess_t *sess = NULL;
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ogs_assert(s);
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ogs_assert(e);
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smf_sm_debug(e);
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sess = e->sess;
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ogs_assert(sess);
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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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default:
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ogs_error("Unknown event %s", smf_event_get_name(e));
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break;
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}
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}
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