forked from acouzens/open5gs
297 lines
7.3 KiB
C
297 lines
7.3 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-event.h"
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#include "mme-sm.h"
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#include "sgsap-path.h"
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int sgsap_open(void)
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{
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mme_vlr_t *vlr = NULL;
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ogs_list_for_each(&mme_self()->vlr_list, vlr) {
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mme_event_t e;
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memset(&e, 0, sizeof(e));
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e.vlr = vlr;
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ogs_fsm_init(&vlr->sm, sgsap_state_initial, sgsap_state_final, &e);
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}
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return OGS_OK;
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}
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void sgsap_close(void)
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{
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mme_vlr_t *vlr = NULL;
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ogs_list_for_each(&mme_self()->vlr_list, vlr) {
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mme_event_t e;
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memset(&e, 0, sizeof(e));
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e.vlr = vlr;
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ogs_fsm_fini(&vlr->sm, &e);
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}
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}
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int sgsap_send(ogs_sock_t *sock, ogs_pkbuf_t *pkbuf,
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ogs_sockaddr_t *addr, uint16_t stream_no)
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{
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int sent;
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ogs_assert(sock);
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ogs_assert(pkbuf);
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sent = ogs_sctp_sendmsg(sock, pkbuf->data, pkbuf->len,
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addr, OGS_SCTP_SGSAP_PPID, stream_no);
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if (sent < 0 || sent != pkbuf->len) {
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ogs_error("ogs_sctp_sendmsg(len:%d,ssn:%d) error (%d:%s)",
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pkbuf->len, stream_no, errno, strerror(errno));
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ogs_pkbuf_free(pkbuf);
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return OGS_ERROR;
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}
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ogs_pkbuf_free(pkbuf);
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return OGS_OK;
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}
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int sgsap_send_to_vlr_with_sid(
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mme_vlr_t *vlr, ogs_pkbuf_t *pkbuf, uint16_t stream_no)
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{
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char buf[OGS_ADDRSTRLEN];
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ogs_sock_t *sock = NULL;;
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ogs_assert(vlr);
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ogs_assert(pkbuf);
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sock = vlr->sock;
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ogs_assert(sock);
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ogs_debug(" VLR-IP[%s]", OGS_ADDR(vlr->addr, buf));
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return sgsap_send(sock, pkbuf, vlr->addr, stream_no);
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}
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int sgsap_send_to_vlr(mme_ue_t *mme_ue, ogs_pkbuf_t *pkbuf)
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{
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mme_csmap_t *csmap = NULL;
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mme_vlr_t *vlr = NULL;
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ogs_assert(pkbuf);
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ogs_assert(mme_ue);
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csmap = mme_ue->csmap;
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ogs_assert(csmap);
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vlr = csmap->vlr;
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ogs_assert(vlr);
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ogs_debug(" TAI[PLMN_ID:%06x,TAC:%d]",
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ogs_plmn_id_hexdump(&csmap->tai.nas_plmn_id), csmap->tai.tac);
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ogs_debug(" LAI[PLMN_ID:%06x,LAC:%d]",
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ogs_plmn_id_hexdump(&csmap->lai.nas_plmn_id), csmap->lai.lac);
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return sgsap_send_to_vlr_with_sid(vlr, pkbuf, mme_ue->vlr_ostream_id);
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}
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int sgsap_send_location_update_request(mme_ue_t *mme_ue)
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{
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int rv;
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ogs_pkbuf_t *pkbuf = NULL;
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ogs_assert(mme_ue);
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ogs_debug("[SGSAP] LOCATION-UPDATE-REQUEST");
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ogs_debug(" IMSI[%s]", mme_ue->imsi_bcd);
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pkbuf = sgsap_build_location_update_request(mme_ue);
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if (!pkbuf) {
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ogs_error("sgsap_build_location_update_request() failed");
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return OGS_ERROR;
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}
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rv = sgsap_send_to_vlr(mme_ue, pkbuf);
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ogs_expect(rv == OGS_OK);
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return rv;
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}
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int sgsap_send_tmsi_reallocation_complete(mme_ue_t *mme_ue)
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{
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int rv;
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ogs_pkbuf_t *pkbuf = NULL;
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ogs_assert(mme_ue);
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ogs_debug("[SGSAP] TMSI-REALLOCATION-COMPLETE");
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ogs_debug(" IMSI[%s]", mme_ue->imsi_bcd);
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pkbuf = sgsap_build_tmsi_reallocation_complete(mme_ue);
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if (!pkbuf) {
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ogs_error("sgsap_build_tmsi_reallocation_complete() failed");
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return OGS_ERROR;
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}
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rv = sgsap_send_to_vlr(mme_ue, pkbuf);
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ogs_expect(rv == OGS_OK);
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return rv;
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}
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int sgsap_send_detach_indication(mme_ue_t *mme_ue)
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{
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int rv;
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ogs_pkbuf_t *pkbuf = NULL;
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ogs_assert(mme_ue);
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pkbuf = sgsap_build_detach_indication(mme_ue);
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if (!pkbuf) {
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ogs_error("sgsap_build_detach_indication() failed");
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return OGS_ERROR;
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}
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rv = sgsap_send_to_vlr(mme_ue, pkbuf);
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ogs_expect(rv == OGS_OK);
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return rv;
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}
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int sgsap_send_mo_csfb_indication(mme_ue_t *mme_ue)
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{
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int rv;
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ogs_pkbuf_t *pkbuf = NULL;
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ogs_assert(mme_ue);
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ogs_debug("[SGSAP] MO-CSFB-INDICATION");
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ogs_debug(" IMSI[%s]", mme_ue->imsi_bcd);
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pkbuf = sgsap_build_mo_csfb_indication(mme_ue);
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if (!pkbuf) {
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ogs_error("sgsap_build_mo_csfb_indication() failed");
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return OGS_ERROR;
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}
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rv = sgsap_send_to_vlr(mme_ue, pkbuf);
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ogs_expect(rv == OGS_OK);
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return rv;
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}
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int sgsap_send_paging_reject(mme_ue_t *mme_ue, uint8_t sgs_cause)
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{
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int rv;
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ogs_pkbuf_t *pkbuf = NULL;
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ogs_assert(mme_ue);
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ogs_debug("[SGSAP] PAGING-REJECT");
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ogs_debug(" IMSI[%s]", mme_ue->imsi_bcd);
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pkbuf = sgsap_build_paging_reject(
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&mme_ue->nas_mobile_identity_imsi,
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SGSAP_IE_IMSI_LEN, sgs_cause);
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if (!pkbuf) {
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ogs_error("sgsap_build_paging_reject() failed");
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return OGS_ERROR;
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}
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rv = sgsap_send_to_vlr(mme_ue, pkbuf);
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ogs_expect(rv == OGS_OK);
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return rv;
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}
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int sgsap_send_service_request(mme_ue_t *mme_ue, uint8_t emm_mode)
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{
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int rv;
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ogs_pkbuf_t *pkbuf = NULL;
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ogs_assert(mme_ue);
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ogs_debug("[SGSAP] SERVICE-REQUEST");
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ogs_debug(" IMSI[%s]", mme_ue->imsi_bcd);
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ogs_debug(" SERVICE_INDICATOR[%d]", mme_ue->service_indicator);
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ogs_debug(" EMM_MODE[%d]", emm_mode);
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pkbuf = sgsap_build_service_request(mme_ue, emm_mode);
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if (!pkbuf) {
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ogs_error("sgsap_build_service_request() failed");
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return OGS_ERROR;
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}
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rv = sgsap_send_to_vlr(mme_ue, pkbuf);
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ogs_expect(rv == OGS_OK);
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return rv;
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}
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int sgsap_send_reset_ack(mme_vlr_t *vlr)
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{
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int rv;
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ogs_pkbuf_t *pkbuf = NULL;
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ogs_assert(vlr);
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ogs_debug("[SGSAP] RESET-ACK");
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pkbuf = sgsap_build_reset_ack(vlr);
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if (!pkbuf) {
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ogs_error("sgsap_build_reset_ack() failed");
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return OGS_ERROR;
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}
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rv = sgsap_send_to_vlr_with_sid(vlr, pkbuf, 0);
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ogs_expect(rv == OGS_OK);
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return rv;
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}
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int sgsap_send_uplink_unitdata(mme_ue_t *mme_ue,
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ogs_nas_eps_message_container_t *nas_message_container)
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{
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int rv;
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ogs_pkbuf_t *pkbuf = NULL;
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ogs_assert(mme_ue);
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ogs_assert(nas_message_container);
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ogs_debug("[SGSAP] UPLINK-UNITDATA");
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ogs_debug(" IMSI[%s]", mme_ue->imsi_bcd);
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ogs_log_hexdump(OGS_LOG_DEBUG,
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nas_message_container->buffer, nas_message_container->length);
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pkbuf = sgsap_build_uplink_unidata(mme_ue, nas_message_container);
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if (!pkbuf) {
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ogs_error("sgsap_build_uplink_unidata() failed");
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return OGS_ERROR;
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}
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rv = sgsap_send_to_vlr(mme_ue, pkbuf);
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ogs_expect(rv == OGS_OK);
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return rv;
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}
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int sgsap_send_ue_unreachable(mme_ue_t *mme_ue, uint8_t sgs_cause)
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{
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int rv;
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ogs_pkbuf_t *pkbuf = NULL;
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ogs_assert(mme_ue);
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ogs_debug("[SGSAP] UE-UNREACHABLE");
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ogs_debug(" IMSI[%s]", mme_ue->imsi_bcd);
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ogs_debug(" CAUSE[%d]", sgs_cause);
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pkbuf = sgsap_build_ue_unreachable(mme_ue, sgs_cause);
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if (!pkbuf) {
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ogs_error("sgsap_build_ue_unreachable() failed");
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return OGS_ERROR;
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}
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rv = sgsap_send_to_vlr(mme_ue, pkbuf);
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ogs_expect(rv == OGS_OK);
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return rv;
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}
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