172 lines
6.9 KiB
C
172 lines
6.9 KiB
C
/*
|
|
* Copyright (C) 2019 by Sukchan Lee <acetcom@gmail.com>
|
|
*
|
|
* This file is part of Open5GS.
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "ogs-sctp.h"
|
|
|
|
#include "mme-event.h"
|
|
#include "s1ap-path.h"
|
|
|
|
static int usrsctp_recv_handler(struct socket *sock,
|
|
union sctp_sockstore addr, void *data, size_t datalen,
|
|
struct sctp_rcvinfo rcv, int flags, void *ulp_info);
|
|
|
|
ogs_sock_t *s1ap_server(ogs_socknode_t *node)
|
|
{
|
|
char buf[OGS_ADDRSTRLEN];
|
|
ogs_sock_t *sock = NULL;
|
|
|
|
ogs_assert(node);
|
|
|
|
ogs_socknode_sctp_option(node, &ogs_config()->sockopt);
|
|
ogs_socknode_nodelay(node, true);
|
|
ogs_socknode_set_poll(node, mme_self()->pollset,
|
|
OGS_POLLIN, usrsctp_recv_handler, node);
|
|
|
|
/* FIXME : libsctp 0.9.3.0 is not properly working in SOCK_STREAM */
|
|
sock = ogs_sctp_server(SOCK_SEQPACKET, node);
|
|
ogs_assert(sock);
|
|
|
|
ogs_info("s1ap_server() [%s]:%d",
|
|
OGS_ADDR(node->addr, buf), OGS_PORT(node->addr));
|
|
|
|
return sock;
|
|
}
|
|
|
|
void s1ap_recv_handler(short when, ogs_socket_t fd, void *data)
|
|
{
|
|
/* At this point, open5gs does not use SOCK_STREAM in libusrsctp */
|
|
ogs_assert_if_reached();
|
|
}
|
|
|
|
static int usrsctp_recv_handler(struct socket *sock,
|
|
union sctp_sockstore store, void *data, size_t datalen,
|
|
struct sctp_rcvinfo rcv, int flags, void *ulp_info)
|
|
{
|
|
ogs_sockaddr_t *addr = NULL;
|
|
|
|
if (data) {
|
|
if (flags & MSG_NOTIFICATION) {
|
|
union sctp_notification *not = (union sctp_notification *)data;
|
|
if (not->sn_header.sn_length == (uint32_t)datalen) {
|
|
switch(not->sn_header.sn_type) {
|
|
case SCTP_ASSOC_CHANGE :
|
|
ogs_debug("SCTP_ASSOC_CHANGE:"
|
|
"[T:%d, F:0x%x, S:%d, I/O:%d/%d]",
|
|
not->sn_assoc_change.sac_type,
|
|
not->sn_assoc_change.sac_flags,
|
|
not->sn_assoc_change.sac_state,
|
|
not->sn_assoc_change.sac_inbound_streams,
|
|
not->sn_assoc_change.sac_outbound_streams);
|
|
|
|
if (not->sn_assoc_change.sac_state ==
|
|
SCTP_SHUTDOWN_COMP ||
|
|
not->sn_assoc_change.sac_state ==
|
|
SCTP_COMM_LOST) {
|
|
addr = ogs_usrsctp_remote_addr(&store);
|
|
ogs_assert(addr);
|
|
|
|
if (not->sn_assoc_change.sac_state ==
|
|
SCTP_SHUTDOWN_COMP)
|
|
ogs_debug("SCTP_SHUTDOWN_COMP");
|
|
if (not->sn_assoc_change.sac_state ==
|
|
SCTP_COMM_LOST)
|
|
ogs_debug("SCTP_COMM_LOST");
|
|
|
|
s1ap_event_push(MME_EVT_S1AP_LO_CONNREFUSED,
|
|
sock, addr, NULL, 0, 0);
|
|
|
|
} else if (not->sn_assoc_change.sac_state == SCTP_COMM_UP) {
|
|
addr = ogs_usrsctp_remote_addr(&store);
|
|
ogs_assert(addr);
|
|
|
|
ogs_debug("SCTP_COMM_UP");
|
|
|
|
s1ap_event_push(MME_EVT_S1AP_LO_SCTP_COMM_UP,
|
|
sock, addr, NULL,
|
|
not->sn_assoc_change.sac_inbound_streams,
|
|
not->sn_assoc_change.sac_outbound_streams);
|
|
}
|
|
break;
|
|
case SCTP_SHUTDOWN_EVENT :
|
|
case SCTP_SEND_FAILED :
|
|
addr = ogs_usrsctp_remote_addr(&store);
|
|
ogs_assert(addr);
|
|
|
|
if (not->sn_header.sn_type == SCTP_SHUTDOWN_EVENT)
|
|
ogs_debug("SCTP_SHUTDOWN_EVENT:"
|
|
"[T:0x%x, F:0x%x, L:0x%x]",
|
|
not->sn_shutdown_event.sse_type,
|
|
not->sn_shutdown_event.sse_flags,
|
|
not->sn_shutdown_event.sse_length);
|
|
if (not->sn_header.sn_type == SCTP_SEND_FAILED)
|
|
ogs_error("SCTP_SEND_FAILED:[T:%d, F:0x%x, S:%d]",
|
|
not->sn_send_failed_event.ssfe_type,
|
|
not->sn_send_failed_event.ssfe_flags,
|
|
not->sn_send_failed_event.ssfe_error);
|
|
|
|
s1ap_event_push(MME_EVT_S1AP_LO_CONNREFUSED,
|
|
sock, addr, NULL, 0, 0);
|
|
break;
|
|
case SCTP_PEER_ADDR_CHANGE:
|
|
ogs_warn("SCTP_PEER_ADDR_CHANGE:"
|
|
"[T:%d, F:0x%x, S:%d]",
|
|
not->sn_paddr_change.spc_type,
|
|
not->sn_paddr_change.spc_flags,
|
|
not->sn_paddr_change.spc_error);
|
|
break;
|
|
case SCTP_ADAPTATION_INDICATION :
|
|
ogs_info("SCTP_ADAPTATION_INDICATION:"
|
|
"[T:%d, F:0x%x, S:%d, I:%d]",
|
|
not->sn_adaptation_event.sai_type,
|
|
not->sn_adaptation_event.sai_flags,
|
|
not->sn_adaptation_event.sai_length,
|
|
not->sn_adaptation_event.sai_adaptation_ind);
|
|
break;
|
|
case SCTP_REMOTE_ERROR:
|
|
ogs_warn("SCTP_REMOTE_ERROR:[T:%d, F:0x%x, S:%d]",
|
|
not->sn_remote_error.sre_type,
|
|
not->sn_remote_error.sre_flags,
|
|
not->sn_remote_error.sre_error);
|
|
break;
|
|
break;
|
|
default :
|
|
ogs_error("Discarding event with "
|
|
"unknown flags:0x%x type:0x%x",
|
|
flags, not->sn_header.sn_type);
|
|
break;
|
|
}
|
|
}
|
|
} else if (flags & MSG_EOR) {
|
|
ogs_pkbuf_t *pkbuf;
|
|
|
|
pkbuf = ogs_pkbuf_alloc(NULL, OGS_MAX_SDU_LEN);
|
|
ogs_pkbuf_put_data(pkbuf, data, datalen);
|
|
|
|
addr = ogs_usrsctp_remote_addr(&store);
|
|
ogs_assert(addr);
|
|
|
|
s1ap_event_push(MME_EVT_S1AP_MESSAGE, sock, addr, pkbuf, 0, 0);
|
|
} else {
|
|
ogs_error("Not engough buffer. Need more recv : 0x%x", flags);
|
|
}
|
|
free(data);
|
|
}
|
|
return (1);
|
|
}
|