forked from acouzens/open5gs
518 lines
18 KiB
C
518 lines
18 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 "npcf-handler.h"
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#include "namf-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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#include "ngap-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, ngap_state;
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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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int state = 0;
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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_assert(true ==
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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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SWITCH(sbi_message->h.service.name)
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CASE(OGS_SBI_SERVICE_NAME_NUDM_SDM)
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stream = e->sbi.data;
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ogs_assert(stream);
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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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strerror = ogs_msprintf("[%s:%d] HTTP response error [%d]",
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smf_ue->supi, sess->psi, sbi_message->res_status);
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ogs_assert(strerror);
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ogs_error("%s", strerror);
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ogs_assert(true ==
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ogs_sbi_server_send_error(
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stream, sbi_message->res_status,
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sbi_message, strerror, NULL));
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ogs_free(strerror);
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OGS_FSM_TRAN(s, smf_gsm_state_exception);
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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_FSM_TRAN(s, smf_gsm_state_session_will_release);
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}
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break;
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DEFAULT
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strerror = ogs_msprintf("[%s:%d] Invalid resource name [%s]",
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smf_ue->supi, sess->psi,
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sbi_message->h.resource.component[1]);
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ogs_assert(strerror);
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ogs_error("%s", strerror);
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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,
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sbi_message, strerror, NULL));
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ogs_free(strerror);
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OGS_FSM_TRAN(s, smf_gsm_state_exception);
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END
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break;
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CASE(OGS_SBI_SERVICE_NAME_NPCF_SMPOLICYCONTROL)
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stream = e->sbi.data;
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state = e->sbi.state;
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SWITCH(sbi_message->h.resource.component[0])
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CASE(OGS_SBI_RESOURCE_NAME_SM_POLICIES)
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if (!sbi_message->h.resource.component[1]) {
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ogs_assert(stream);
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if (sbi_message->res_status !=
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OGS_SBI_HTTP_STATUS_CREATED) {
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strerror = ogs_msprintf(
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"[%s:%d] HTTP response error [%d]",
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smf_ue->supi, sess->psi,
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sbi_message->res_status);
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ogs_assert(strerror);
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ogs_error("%s", strerror);
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ogs_assert(true ==
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ogs_sbi_server_send_error(stream,
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sbi_message->res_status,
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sbi_message, strerror, NULL));
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ogs_free(strerror);
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break;
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}
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smf_npcf_smpolicycontrol_handle_create(
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sess, stream, state, sbi_message);
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} else {
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SWITCH(sbi_message->h.resource.component[2])
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CASE(OGS_SBI_RESOURCE_NAME_DELETE)
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if (sbi_message->res_status !=
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OGS_SBI_HTTP_STATUS_NO_CONTENT) {
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strerror = ogs_msprintf(
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"[%s:%d] HTTP response error [%d]",
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smf_ue->supi, sess->psi,
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sbi_message->res_status);
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ogs_assert(strerror);
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ogs_error("%s", strerror);
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ogs_free(strerror);
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}
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smf_npcf_smpolicycontrol_handle_delete(
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sess, stream, state, sbi_message);
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break;
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DEFAULT
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strerror = ogs_msprintf("[%s:%d] "
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"Unknown resource name [%s]",
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smf_ue->supi, sess->psi,
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sbi_message->h.resource.component[2]);
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ogs_assert(strerror);
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ogs_error("%s", strerror);
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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_BAD_REQUEST,
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sbi_message, strerror, NULL));
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ogs_free(strerror);
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END
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}
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break;
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DEFAULT
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strerror = ogs_msprintf("[%s:%d] Invalid resource name [%s]",
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smf_ue->supi, sess->psi,
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sbi_message->h.resource.component[0]);
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ogs_assert(strerror);
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ogs_error("%s", strerror);
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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,
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sbi_message, strerror, NULL));
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ogs_free(strerror);
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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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smf_namf_comm_handle_n1_n2_message_transfer(
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sess, e->sbi.state, sbi_message);
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break;
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DEFAULT
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ogs_error("[%s:%d] Invalid resource name [%s]",
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smf_ue->supi, sess->psi,
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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("[%s:%d] Invalid API name [%s]",
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smf_ue->supi, sess->psi, sbi_message->h.service.name);
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ogs_assert_if_reached();
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END
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break;
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case 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_MODIFICATION_REQUEST:
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rv = gsm_handle_pdu_session_modification_request(sess, stream,
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&nas_message->gsm.pdu_session_modification_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_MODIFICATION_COMPLETE:
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ogs_assert(true == ogs_sbi_send_http_status_no_content(stream));
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break;
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case OGS_NAS_5GS_PDU_SESSION_RELEASE_REQUEST:
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if (sess->policy_association_id) {
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smf_npcf_smpolicycontrol_param_t param;
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memset(¶m, 0, sizeof(param));
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param.ran_nas_release.gsm_cause =
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OGS_5GSM_CAUSE_REGULAR_DEACTIVATION;
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param.ran_nas_release.ngap_cause.group = NGAP_Cause_PR_nas;
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param.ran_nas_release.ngap_cause.value =
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NGAP_CauseNas_normal_release;
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ogs_assert(true ==
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smf_sbi_discover_and_send(OpenAPI_nf_type_PCF, sess, stream,
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OGS_PFCP_DELETE_TRIGGER_UE_REQUESTED, ¶m,
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smf_npcf_smpolicycontrol_build_delete));
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} else {
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ogs_error("[%s:%d] No PolicyAssociationId",
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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_COMPLETE:
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ogs_assert(true == ogs_sbi_send_http_status_no_content(stream));
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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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* ogs_sbi_send_http_status_no_content(stream);
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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_assert(true ==
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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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}
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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_SETUP_FAIL:
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rv = ngap_handle_pdu_session_resource_setup_unsuccessful_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_MOD_RSP:
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rv = ngap_handle_pdu_session_resource_modify_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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ngap_state = sess->ngap_state.pdu_session_resource_release;
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if (ngap_state == SMF_NGAP_STATE_NONE) {
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strerror = ogs_msprintf(
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"[%s:%d] No PDUSessionResourceReleaseRequest",
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smf_ue->supi, sess->psi);
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ogs_assert(strerror);
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ogs_error("%s", strerror);
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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, NULL, strerror, NULL));
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ogs_free(strerror);
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OGS_FSM_TRAN(s, smf_gsm_state_exception);
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} else if (
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ngap_state == SMF_NGAP_STATE_DELETE_TRIGGER_UE_REQUESTED ||
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ngap_state == SMF_NGAP_STATE_DELETE_TRIGGER_PCF_INITIATED) {
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ogs_assert(true == ogs_sbi_send_http_status_no_content(stream));
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} else if (ngap_state ==
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SMF_NGAP_STATE_ERROR_INDICATION_RECEIVED_FROM_5G_AN) {
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smf_n1_n2_message_transfer_param_t param;
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ogs_assert(true == ogs_sbi_send_http_status_no_content(stream));
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memset(¶m, 0, sizeof(param));
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param.state = SMF_NETWORK_TRIGGERED_SERVICE_REQUEST;
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param.n2smbuf =
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ngap_build_pdu_session_resource_setup_request_transfer(
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sess);
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ogs_assert(param.n2smbuf);
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param.n1n2_failure_txf_notif_uri = true;
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smf_namf_comm_send_n1_n2_message_transfer(sess, ¶m);
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} else {
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ogs_fatal("Invalid state [%d]", ngap_state);
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ogs_assert_if_reached();
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}
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break;
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case OpenAPI_n2_sm_info_type_PATH_SWITCH_REQ:
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rv = ngap_handle_path_switch_request_transfer(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_HANDOVER_REQUIRED:
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rv = ngap_handle_handover_required_transfer(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_HANDOVER_REQ_ACK:
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rv = ngap_handle_handover_request_ack(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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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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}
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}
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void smf_gsm_state_session_will_release(ogs_fsm_t *s, smf_event_t *e)
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{
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smf_sess_t *sess = NULL;
|
|
ogs_assert(s);
|
|
ogs_assert(e);
|
|
|
|
smf_sm_debug(e);
|
|
|
|
sess = e->sess;
|
|
ogs_assert(sess);
|
|
|
|
switch (e->id) {
|
|
case OGS_FSM_ENTRY_SIG:
|
|
break;
|
|
|
|
case OGS_FSM_EXIT_SIG:
|
|
break;
|
|
|
|
default:
|
|
ogs_error("Unknown event %s", smf_event_get_name(e));
|
|
break;
|
|
}
|
|
}
|
|
|
|
void smf_gsm_state_exception(ogs_fsm_t *s, smf_event_t *e)
|
|
{
|
|
smf_sess_t *sess = NULL;
|
|
ogs_assert(s);
|
|
ogs_assert(e);
|
|
|
|
smf_sm_debug(e);
|
|
|
|
sess = e->sess;
|
|
ogs_assert(sess);
|
|
|
|
switch (e->id) {
|
|
case OGS_FSM_ENTRY_SIG:
|
|
break;
|
|
|
|
case OGS_FSM_EXIT_SIG:
|
|
break;
|
|
|
|
default:
|
|
ogs_error("Unknown event %s", smf_event_get_name(e));
|
|
break;
|
|
}
|
|
}
|