116 lines
2.8 KiB
C
116 lines
2.8 KiB
C
/* Command line utility to create GTP link */
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/* (C) 2014 by sysmocom - s.f.m.c. GmbH
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* (C) 2016 by Pablo Neira Ayuso <pablo@netfilter.org>
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*
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* Author: Pablo Neira Ayuso <pablo@gnumonks.org>
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*
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* All Rights Reserved
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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 General Public License as published by
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* the Free Software Foundation; either version 2 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 Affero 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 <http://www.gnu.org/licenses/>.
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <time.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <libmnl/libmnl.h>
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#include <linux/if.h>
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#include <linux/if_link.h>
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#include <linux/rtnetlink.h>
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#include <linux/gtp.h>
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#include <linux/if_link.h>
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#include <libgtpnl/gtpnl.h>
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int main(int argc, char *argv[])
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{
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char buf[MNL_SOCKET_BUFFER_SIZE];
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int ret, sgsn_mode = 0;
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if (argc < 3) {
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printf("Usage: %s add <device> [--sgsn]\n", argv[0]);
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printf(" %s del <device>\n", argv[0]);
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exit(EXIT_FAILURE);
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}
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if (!strcmp(argv[1], "del")) {
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printf("destroying gtp interface...\n");
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if (gtp_dev_destroy(argv[2]) < 0)
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perror("gtp_dev_destroy");
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return 0;
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}
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if (argc > 3 && !strcmp(argv[3], "--sgsn"))
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sgsn_mode = 1;
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int fd1 = socket(AF_INET, SOCK_DGRAM, 0);
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int fd2 = socket(AF_INET, SOCK_DGRAM, 0);
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struct sockaddr_in sockaddr_fd1 = {
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.sin_family = AF_INET,
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.sin_port = htons(3386),
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.sin_addr = {
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.s_addr = INADDR_ANY,
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},
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};
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struct sockaddr_in sockaddr_fd2 = {
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.sin_family = AF_INET,
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.sin_port = htons(2152),
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.sin_addr = {
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.s_addr = INADDR_ANY,
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},
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};
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if (bind(fd1, (struct sockaddr *) &sockaddr_fd1,
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sizeof(sockaddr_fd1)) < 0) {
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perror("bind");
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exit(EXIT_FAILURE);
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}
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if (bind(fd2, (struct sockaddr *) &sockaddr_fd2,
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sizeof(sockaddr_fd2)) < 0) {
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perror("bind");
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exit(EXIT_FAILURE);
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}
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if (sgsn_mode)
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ret = gtp_dev_create_sgsn(-1, argv[2], fd1, fd2);
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else
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ret = gtp_dev_create(-1, argv[2], fd1, fd2);
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if (ret < 0) {
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perror("cannot create GTP device\n");
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exit(EXIT_FAILURE);
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}
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fprintf(stderr, "WARNING: attaching dummy socket descriptors. Keep "
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"this process running for testing purposes.\n");
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while (1) {
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struct sockaddr_in addr;
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socklen_t len = sizeof(addr);
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ret = recvfrom(fd1, buf, sizeof(buf), 0,
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(struct sockaddr *)&addr, &len);
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printf("received %d bytes via UDP socket\n", ret);
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}
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return 0;
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}
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