forked from acouzens/open5gs
157 lines
4.3 KiB
C
157 lines
4.3 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 "context.h"
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#include "event.h"
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#include "gtp-path.h"
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#include "s5c-build.h"
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#define SMF_GTP_HANDLED 1
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static void _gtpv2_c_recv_cb(short when, ogs_socket_t fd, void *data)
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{
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smf_event_t *e = NULL;
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int rv;
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ssize_t size;
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ogs_pkbuf_t *pkbuf = NULL;
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ogs_sockaddr_t from;
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ogs_gtp_node_t *gnode = NULL;
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ogs_assert(fd != INVALID_SOCKET);
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pkbuf = ogs_pkbuf_alloc(NULL, OGS_MAX_SDU_LEN);
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ogs_pkbuf_put(pkbuf, OGS_MAX_SDU_LEN);
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size = ogs_recvfrom(fd, pkbuf->data, pkbuf->len, 0, &from);
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if (size <= 0) {
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ogs_log_message(OGS_LOG_ERROR, ogs_socket_errno,
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"ogs_recvfrom() failed");
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ogs_pkbuf_free(pkbuf);
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return;
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}
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ogs_pkbuf_trim(pkbuf, size);
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e = smf_event_new(SMF_EVT_S5C_MESSAGE);
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gnode = ogs_gtp_node_find_by_addr(&smf_self()->sgw_s5c_list, &from);
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if (!gnode) {
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gnode = ogs_gtp_node_add_by_addr(&smf_self()->sgw_s5c_list, &from);
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ogs_assert(gnode);
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gnode->sock = data;
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}
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ogs_assert(e);
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e->gnode = gnode;
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e->pkbuf = pkbuf;
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rv = ogs_queue_push(smf_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_pkbuf_free(e->pkbuf);
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smf_event_free(e);
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}
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}
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int smf_gtp_open(void)
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{
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ogs_socknode_t *node = NULL;
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ogs_sock_t *sock = NULL;
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ogs_list_for_each(&smf_self()->gtpc_list, node) {
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sock = ogs_gtp_server(node);
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ogs_assert(sock);
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node->poll = ogs_pollset_add(smf_self()->pollset,
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OGS_POLLIN, sock->fd, _gtpv2_c_recv_cb, sock);
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}
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ogs_list_for_each(&smf_self()->gtpc_list6, node) {
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sock = ogs_gtp_server(node);
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ogs_assert(sock);
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node->poll = ogs_pollset_add(smf_self()->pollset,
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OGS_POLLIN, sock->fd, _gtpv2_c_recv_cb, sock);
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}
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smf_self()->gtpc_sock = ogs_socknode_sock_first(&smf_self()->gtpc_list);
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if (smf_self()->gtpc_sock)
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smf_self()->gtpc_addr = &smf_self()->gtpc_sock->local_addr;
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smf_self()->gtpc_sock6 = ogs_socknode_sock_first(&smf_self()->gtpc_list6);
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if (smf_self()->gtpc_sock6)
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smf_self()->gtpc_addr6 = &smf_self()->gtpc_sock6->local_addr;
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ogs_assert(smf_self()->gtpc_addr || smf_self()->gtpc_addr6);
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return OGS_OK;
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}
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void smf_gtp_close(void)
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{
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ogs_socknode_remove_all(&smf_self()->gtpc_list);
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ogs_socknode_remove_all(&smf_self()->gtpc_list6);
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}
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void smf_gtp_send_create_session_response(
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smf_sess_t *sess, ogs_gtp_xact_t *xact)
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{
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int rv;
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ogs_gtp_header_t h;
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ogs_pkbuf_t *pkbuf = NULL;
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ogs_assert(sess);
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ogs_assert(xact);
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memset(&h, 0, sizeof(ogs_gtp_header_t));
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h.type = OGS_GTP_CREATE_SESSION_RESPONSE_TYPE;
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h.teid = sess->sgw_s5c_teid;
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pkbuf = smf_s5c_build_create_session_response(h.type, sess);
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ogs_expect_or_return(pkbuf);
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rv = ogs_gtp_xact_update_tx(xact, &h, pkbuf);
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ogs_expect_or_return(rv == OGS_OK);
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rv = ogs_gtp_xact_commit(xact);
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ogs_expect(rv == OGS_OK);
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}
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void smf_gtp_send_delete_session_response(
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smf_sess_t *sess, ogs_gtp_xact_t *xact)
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{
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int rv;
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ogs_gtp_header_t h;
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ogs_pkbuf_t *pkbuf = NULL;
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ogs_assert(xact);
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ogs_assert(sess);
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memset(&h, 0, sizeof(ogs_gtp_header_t));
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h.type = OGS_GTP_DELETE_SESSION_RESPONSE_TYPE;
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h.teid = sess->sgw_s5c_teid;
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pkbuf = smf_s5c_build_delete_session_response(h.type, sess);
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ogs_expect_or_return(pkbuf);
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rv = ogs_gtp_xact_update_tx(xact, &h, pkbuf);
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ogs_expect_or_return(rv == OGS_OK);
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rv = ogs_gtp_xact_commit(xact);
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ogs_expect(rv == OGS_OK);
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}
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