203 lines
5.1 KiB
C
203 lines
5.1 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 "ogs-sctp.h"
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#include "mme-context.h"
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#include "mme-event.h"
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#include "mme-timer.h"
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#include "mme-sm.h"
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#include "sgsap-path.h"
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#include "sgsap-handler.h"
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void sgsap_state_initial(ogs_fsm_t *s, mme_event_t *e)
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{
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mme_vlr_t *vlr = NULL;
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ogs_assert(s);
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ogs_assert(e);
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mme_sm_debug(e);
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vlr = e->vlr;
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ogs_assert(vlr);
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vlr->t_conn = ogs_timer_add(ogs_app()->timer_mgr,
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mme_timer_sgs_cli_conn_to_srv, vlr);
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ogs_expect_or_return(vlr->t_conn);
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OGS_FSM_TRAN(s, &sgsap_state_will_connect);
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}
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void sgsap_state_final(ogs_fsm_t *s, mme_event_t *e)
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{
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mme_vlr_t *vlr = NULL;
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ogs_assert(s);
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ogs_assert(e);
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mme_sm_debug(e);
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vlr = e->vlr;
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ogs_assert(vlr);
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ogs_timer_delete(vlr->t_conn);
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}
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void sgsap_state_will_connect(ogs_fsm_t *s, mme_event_t *e)
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{
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char buf[OGS_ADDRSTRLEN];
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mme_vlr_t *vlr = NULL;
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ogs_sockaddr_t *addr = NULL;
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ogs_assert(s);
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ogs_assert(e);
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mme_sm_debug(e);
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vlr = e->vlr;
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ogs_assert(vlr);
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ogs_assert(vlr->t_conn);
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switch (e->id) {
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case OGS_FSM_ENTRY_SIG:
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ogs_timer_start(vlr->t_conn,
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mme_timer_cfg(MME_TIMER_SGS_CLI_CONN_TO_SRV)->duration);
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sgsap_client(vlr);
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break;
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case OGS_FSM_EXIT_SIG:
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ogs_timer_stop(vlr->t_conn);
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break;
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case MME_EVENT_SGSAP_TIMER:
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switch(e->timer_id) {
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case MME_TIMER_SGS_CLI_CONN_TO_SRV:
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vlr = e->vlr;
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ogs_assert(vlr);
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addr = vlr->sa_list;
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ogs_assert(addr);
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ogs_warn("[SGsAP] Connect to VLR [%s]:%d failed",
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OGS_ADDR(addr, buf), OGS_PORT(addr));
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ogs_assert(vlr->t_conn);
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ogs_timer_start(vlr->t_conn,
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mme_timer_cfg(MME_TIMER_SGS_CLI_CONN_TO_SRV)->duration);
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mme_vlr_close(vlr);
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sgsap_client(vlr);
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break;
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default:
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ogs_error("Unknown timer[%s:%d]",
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mme_timer_get_name(e->timer_id), e->timer_id);
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break;
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}
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break;
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case MME_EVENT_SGSAP_LO_SCTP_COMM_UP:
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OGS_FSM_TRAN(s, sgsap_state_connected);
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break;
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default:
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ogs_error("Unknown event %s", mme_event_get_name(e));
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break;
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}
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}
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void sgsap_state_connected(ogs_fsm_t *s, mme_event_t *e)
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{
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mme_vlr_t *vlr = NULL;
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ogs_pkbuf_t *pkbuf = NULL;
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uint8_t type;
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ogs_assert(s);
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ogs_assert(e);
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mme_sm_debug(e);
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vlr = e->vlr;
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ogs_assert(vlr);
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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 MME_EVENT_SGSAP_LO_CONNREFUSED:
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mme_vlr_close(vlr);
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OGS_FSM_TRAN(s, sgsap_state_will_connect);
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break;
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case MME_EVENT_SGSAP_MESSAGE:
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pkbuf = e->pkbuf;
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ogs_assert(pkbuf);
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type = *(unsigned char *)(pkbuf->data);
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switch (type) {
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case SGSAP_LOCATION_UPDATE_ACCEPT:
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sgsap_handle_location_update_accept(vlr, pkbuf);
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break;
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case SGSAP_LOCATION_UPDATE_REJECT:
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sgsap_handle_location_update_reject(vlr, pkbuf);
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break;
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case SGSAP_EPS_DETACH_ACK:
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case SGSAP_IMSI_DETACH_ACK:
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sgsap_handle_detach_ack(vlr, pkbuf);
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break;
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case SGSAP_PAGING_REQUEST:
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sgsap_handle_paging_request(vlr, pkbuf);
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break;
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case SGSAP_DOWNLINK_UNITDATA:
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sgsap_handle_downlink_unitdata(vlr, pkbuf);
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break;
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case SGSAP_RESET_INDICATION:
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sgsap_handle_reset_indication(vlr, pkbuf);
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mme_vlr_close(vlr);
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OGS_FSM_TRAN(s, sgsap_state_will_connect);
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break;
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case SGSAP_RELEASE_REQUEST:
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sgsap_handle_release_request(vlr, pkbuf);
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break;
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case SGSAP_MM_INFORMATION_REQUEST:
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sgsap_handle_mm_information_request(vlr, pkbuf);
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break;
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default:
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ogs_warn("Unknown Message Type: [%d]", type);
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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("Unknown event %s", mme_event_get_name(e));
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break;
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}
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}
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void sgsap_state_exception(ogs_fsm_t *s, mme_event_t *e)
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{
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ogs_assert(s);
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ogs_assert(e);
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mme_sm_debug(e);
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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", mme_event_get_name(e));
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break;
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}
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}
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