forked from acouzens/open5gs
208 lines
7.0 KiB
C
208 lines
7.0 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 "sgsap-path.h"
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#include "mme-context.h"
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#include "mme-event.h"
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#include "s1ap-path.h"
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#if HAVE_USRSCTP
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static void usrsctp_recv_handler(struct socket *socket, void *data, int flags);
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#else
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static void lksctp_recv_handler(short when, ogs_socket_t fd, void *data);
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#endif
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static void recv_handler(ogs_sock_t *sock);
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ogs_sock_t *sgsap_client(mme_vlr_t *vlr)
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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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sock = ogs_sctp_client(SOCK_SEQPACKET, vlr->sa_list, vlr->option);
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if (sock) {
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vlr->sock = sock;
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#if HAVE_USRSCTP
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vlr->addr = vlr->sa_list;
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usrsctp_set_non_blocking((struct socket *)sock, 1);
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usrsctp_set_upcall((struct socket *)sock, usrsctp_recv_handler, NULL);
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#else
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vlr->addr = &sock->remote_addr;
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vlr->poll = ogs_pollset_add(ogs_app()->pollset,
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OGS_POLLIN, sock->fd, lksctp_recv_handler, sock);
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ogs_assert(vlr->poll);
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#endif
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ogs_info("sgsap client() [%s]:%d",
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OGS_ADDR(vlr->addr, buf), OGS_PORT(vlr->addr));
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}
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return sock;
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}
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#if HAVE_USRSCTP
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static void usrsctp_recv_handler(struct socket *socket, void *data, int flags)
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{
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int events;
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while ((events = usrsctp_get_events(socket)) &&
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(events & SCTP_EVENT_READ)) {
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recv_handler((ogs_sock_t *)socket);
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}
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}
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#else
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static void lksctp_recv_handler(short when, ogs_socket_t fd, void *data)
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{
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ogs_sock_t *sock = NULL;
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sock = data;
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ogs_assert(fd != INVALID_SOCKET);
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ogs_assert(sock);
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recv_handler(sock);
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}
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#endif
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static void recv_handler(ogs_sock_t *sock)
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{
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ogs_pkbuf_t *pkbuf;
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int size;
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ogs_sockaddr_t *addr = NULL;
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ogs_sockaddr_t from;
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ogs_sctp_info_t sinfo;
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int flags = 0;
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ogs_assert(sock);
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pkbuf = ogs_pkbuf_alloc(NULL, OGS_MAX_SDU_LEN);
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ogs_assert(pkbuf);
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ogs_pkbuf_put(pkbuf, OGS_MAX_SDU_LEN);
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size = ogs_sctp_recvmsg(
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sock, pkbuf->data, pkbuf->len, &from, &sinfo, &flags);
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if (size < 0 || size >= OGS_MAX_SDU_LEN) {
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ogs_error("ogs_sctp_recvmsg(%d) failed(%d:%s)",
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size, errno, strerror(errno));
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ogs_pkbuf_free(pkbuf);
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return;
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}
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if (flags & MSG_NOTIFICATION) {
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union sctp_notification *not =
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(union sctp_notification *)pkbuf->data;
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switch(not->sn_header.sn_type) {
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case SCTP_ASSOC_CHANGE :
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ogs_debug("SCTP_ASSOC_CHANGE:"
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"[T:%d, F:0x%x, S:%d, I/O:%d/%d]",
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not->sn_assoc_change.sac_type,
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not->sn_assoc_change.sac_flags,
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not->sn_assoc_change.sac_state,
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not->sn_assoc_change.sac_inbound_streams,
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not->sn_assoc_change.sac_outbound_streams);
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if (not->sn_assoc_change.sac_state == SCTP_COMM_UP) {
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ogs_debug("SCTP_COMM_UP");
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addr = ogs_calloc(1, sizeof(ogs_sockaddr_t));
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ogs_assert(addr);
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memcpy(addr, &from, sizeof(ogs_sockaddr_t));
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sgsap_event_push(MME_EVT_SGSAP_LO_SCTP_COMM_UP,
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sock, addr, NULL,
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not->sn_assoc_change.sac_inbound_streams,
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not->sn_assoc_change.sac_outbound_streams);
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} else if (not->sn_assoc_change.sac_state == SCTP_SHUTDOWN_COMP ||
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not->sn_assoc_change.sac_state == SCTP_COMM_LOST) {
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if (not->sn_assoc_change.sac_state == SCTP_SHUTDOWN_COMP)
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ogs_debug("SCTP_SHUTDOWN_COMP");
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if (not->sn_assoc_change.sac_state == SCTP_COMM_LOST)
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ogs_debug("SCTP_COMM_LOST");
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addr = ogs_calloc(1, sizeof(ogs_sockaddr_t));
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ogs_assert(addr);
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memcpy(addr, &from, sizeof(ogs_sockaddr_t));
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sgsap_event_push(MME_EVT_SGSAP_LO_CONNREFUSED,
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sock, addr, NULL, 0, 0);
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}
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break;
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case SCTP_SHUTDOWN_EVENT :
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case SCTP_SEND_FAILED :
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if (not->sn_header.sn_type == SCTP_SHUTDOWN_EVENT)
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ogs_debug("SCTP_SHUTDOWN_EVENT:[T:%d, F:0x%x, L:%d]",
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not->sn_shutdown_event.sse_type,
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not->sn_shutdown_event.sse_flags,
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not->sn_shutdown_event.sse_length);
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if (not->sn_header.sn_type == SCTP_SEND_FAILED)
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#if HAVE_USRSCTP
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ogs_error("SCTP_SEND_FAILED:[T:%d, F:0x%x, S:%d]",
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not->sn_send_failed_event.ssfe_type,
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not->sn_send_failed_event.ssfe_flags,
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not->sn_send_failed_event.ssfe_error);
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#else
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ogs_error("SCTP_SEND_FAILED:[T:%d, F:0x%x, S:%d]",
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not->sn_send_failed.ssf_type,
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not->sn_send_failed.ssf_flags,
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not->sn_send_failed.ssf_error);
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#endif
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addr = ogs_calloc(1, sizeof(ogs_sockaddr_t));
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ogs_assert(addr);
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memcpy(addr, &from, sizeof(ogs_sockaddr_t));
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sgsap_event_push(MME_EVT_SGSAP_LO_CONNREFUSED,
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sock, addr, NULL, 0, 0);
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break;
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case SCTP_PEER_ADDR_CHANGE:
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ogs_warn("SCTP_PEER_ADDR_CHANGE:[T:%d, F:0x%x, S:%d]",
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not->sn_paddr_change.spc_type,
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not->sn_paddr_change.spc_flags,
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not->sn_paddr_change.spc_error);
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break;
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case SCTP_REMOTE_ERROR:
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ogs_warn("SCTP_REMOTE_ERROR:[T:%d, F:0x%x, S:%d]",
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not->sn_remote_error.sre_type,
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not->sn_remote_error.sre_flags,
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not->sn_remote_error.sre_error);
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break;
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default :
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ogs_error("Discarding event with unknown flags:0x%x type:0x%x",
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flags, not->sn_header.sn_type);
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break;
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}
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} else if (flags & MSG_EOR) {
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ogs_pkbuf_trim(pkbuf, size);
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addr = ogs_calloc(1, sizeof(ogs_sockaddr_t));
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ogs_assert(addr);
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memcpy(addr, &from, sizeof(ogs_sockaddr_t));
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sgsap_event_push(MME_EVT_SGSAP_MESSAGE, sock, addr, pkbuf, 0, 0);
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return;
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} else {
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ogs_fatal("Invalid flag(0x%x)", flags);
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ogs_assert_if_reached();
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}
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ogs_pkbuf_free(pkbuf);
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}
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