forked from acouzens/open5gs
209 lines
7.2 KiB
C
209 lines
7.2 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 "app/context.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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static void recv_handler(short when, ogs_socket_t fd, void *data);
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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_socknode_t *node = NULL;
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ogs_sock_t *sock = NULL;
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node = mme_vlr_new_node(vlr);
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ogs_assert(node);
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ogs_socknode_sctp_option(node, &context_self()->config.sockopt);
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ogs_socknode_nodelay(node, true);
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ogs_socknode_set_poll(node, mme_self()->pollset,
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OGS_POLLIN, recv_handler, node);
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sock = ogs_sctp_client(SOCK_SEQPACKET, node);
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if (sock) {
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ogs_info("sgsap client() [%s]:%d",
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OGS_ADDR(node->addr, buf), OGS_PORT(node->addr));
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vlr->addr = &sock->remote_addr;
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}
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return sock;
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}
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static void recv_handler(short when, ogs_socket_t fd, void *data)
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{
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int rv;
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ogs_pkbuf_t *pkbuf;
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int size;
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mme_event_t *e = NULL;
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ogs_socknode_t *node = data;
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ogs_sock_t *sock = NULL;
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ogs_sockaddr_t *addr = NULL;
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ogs_sctp_info_t sinfo;
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int flags = 0;
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ogs_assert(node);
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sock = node->sock;
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ogs_assert(sock);
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ogs_assert(fd != INVALID_SOCKET);
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pkbuf = ogs_pkbuf_alloc(NULL, MAX_SDU_LEN);
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ogs_pkbuf_put(pkbuf, MAX_SDU_LEN);
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size = ogs_sctp_recvmsg(
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sock, pkbuf->data, pkbuf->len, NULL, &sinfo, &flags);
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if (size < 0) {
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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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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, &sock->remote_addr, sizeof(ogs_sockaddr_t));
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e = mme_event_new(MME_EVT_SGSAP_LO_SCTP_COMM_UP);
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ogs_assert(e);
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e->vlr_sock = sock;
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e->vlr_addr = addr;
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e->max_num_of_istreams =
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not->sn_assoc_change.sac_inbound_streams;
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e->max_num_of_ostreams =
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not->sn_assoc_change.sac_outbound_streams;
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rv = ogs_queue_push(mme_self()->queue, e);
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if (rv != OGS_OK) {
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ogs_warn("ogs_queue_push() failed:%d", (int)rv);
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ogs_free(e->vlr_addr);
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mme_event_free(e);
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}
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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, &sock->remote_addr, sizeof(ogs_sockaddr_t));
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e = mme_event_new(MME_EVT_SGSAP_LO_CONNREFUSED);
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ogs_assert(e);
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e->vlr_sock = sock;
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e->vlr_addr = addr;
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rv = ogs_queue_push(mme_self()->queue, e);
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if (rv != OGS_OK) {
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ogs_warn("ogs_queue_push() failed:%d", (int)rv);
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ogs_free(e->vlr_addr);
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mme_event_free(e);
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}
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}
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break;
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case 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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addr = ogs_calloc(1, sizeof(ogs_sockaddr_t));
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ogs_assert(addr);
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memcpy(addr, &sock->remote_addr, sizeof(ogs_sockaddr_t));
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e = mme_event_new(MME_EVT_SGSAP_LO_CONNREFUSED);
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ogs_assert(e);
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e->vlr_sock = sock;
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e->vlr_addr = addr;
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rv = ogs_queue_push(mme_self()->queue, e);
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if (rv != OGS_OK) {
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ogs_warn("ogs_queue_push() failed:%d", (int)rv);
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ogs_free(e->vlr_addr);
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mme_event_free(e);
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}
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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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case SCTP_SEND_FAILED :
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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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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, &sock->remote_addr, sizeof(ogs_sockaddr_t));
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e = mme_event_new(MME_EVT_SGSAP_MESSAGE);
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ogs_assert(e);
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e->vlr_sock = sock;
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e->vlr_addr = addr;
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e->pkbuf = pkbuf;
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rv = ogs_queue_push(mme_self()->queue, e);
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if (rv != OGS_OK) {
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ogs_warn("ogs_queue_push() failed:%d", (int)rv);
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ogs_free(e->vlr_addr);
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ogs_pkbuf_free(e->pkbuf);
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mme_event_free(e);
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}
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return;
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} else {
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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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