407 lines
8.8 KiB
C
407 lines
8.8 KiB
C
/* Relay UDT/all SCCP messages */
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/*
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* (C) 2010-2011 by Holger Hans Peter Freyther <zecke@selfish.org>
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* (C) 2010-2011 by On-Waves
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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 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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <mtp_data.h>
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#include <mtp_level3.h>
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#include <mtp_pcap.h>
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#include <thread.h>
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#include <bsc_data.h>
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#include <snmp_mtp.h>
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#include <cellmgr_debug.h>
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#include <sctp_m2ua.h>
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#include <ss7_application.h>
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#include <osmocom/m2ua/m2ua_msg.h>
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#include <osmocore/talloc.h>
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#include <osmocom/sccp/sccp.h>
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#include <osmocom/vty/vty.h>
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#include <osmocom/vty/telnet_interface.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include <unistd.h>
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#include <getopt.h>
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#undef PACKAGE_NAME
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#undef PACKAGE_VERSION
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#undef PACKAGE_BUGREPORT
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#undef PACKAGE_TARNAME
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#undef PACKAGE_STRING
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#include <cellmgr_config.h>
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static struct log_target *stderr_target;
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static char *config = "osmo_stp.cfg";
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struct bsc_data *bsc;
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extern void cell_vty_init(void);
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/*
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* methods called from the MTP Level3 part
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*/
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static void print_usage()
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{
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printf("Usage: osmo-stp\n");
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}
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static void sigint()
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{
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static pthread_mutex_t exit_mutex = PTHREAD_MUTEX_INITIALIZER;
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static int handled = 0;
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struct mtp_link_set *set;
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/* failed to lock */
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if (pthread_mutex_trylock(&exit_mutex) != 0)
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return;
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if (handled)
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goto out;
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printf("Terminating.\n");
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handled = 1;
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if (bsc) {
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llist_for_each_entry(set, &bsc->linksets, entry)
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link_shutdown_all(set);
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}
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exit(0);
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out:
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pthread_mutex_unlock(&exit_mutex);
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}
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static void print_help()
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{
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printf(" Some useful help...\n");
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printf(" -h --help this text\n");
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printf(" -c --config=CFG The config file to use.\n");
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printf(" -p --pcap=FILE. Write MSUs to the PCAP file.\n");
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printf(" -c --once. Send the SLTM msg only once.\n");
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printf(" -v --version. Print the version number\n");
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}
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static void handle_options(int argc, char **argv)
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{
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while (1) {
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int option_index = 0, c;
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static struct option long_options[] = {
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{"help", 0, 0, 'h'},
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{"config", 1, 0, 'c'},
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{"pcap", 1, 0, 'p'},
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{"version", 0, 0, 0},
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{0, 0, 0, 0},
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};
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c = getopt_long(argc, argv, "hc:p:v",
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long_options, &option_index);
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if (c == -1)
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break;
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switch (c) {
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case 'h':
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print_usage();
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print_help();
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exit(0);
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case 'p':
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if (bsc->pcap_fd >= 0)
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close(bsc->pcap_fd);
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bsc->pcap_fd = open(optarg, O_WRONLY | O_TRUNC | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP| S_IROTH);
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if (bsc->pcap_fd < 0) {
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fprintf(stderr, "Failed to open PCAP file.\n");
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exit(0);
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}
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mtp_pcap_write_header(bsc->pcap_fd);
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break;
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case 'c':
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config = optarg;
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break;
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case 'v':
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printf("This is %s version %s.\n", PACKAGE, VERSION);
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exit(0);
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break;
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default:
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fprintf(stderr, "Unknown option.\n");
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break;
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}
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}
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}
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static struct mtp_link_set *find_link_set(struct bsc_data *bsc,
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int len, const char *buf)
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{
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struct mtp_link_set *set;
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llist_for_each_entry(set, &bsc->linksets, entry)
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if (strncmp(buf, set->name, len) == 0)
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return set;
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return NULL;
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}
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static int inject_read_cb(struct bsc_fd *fd, unsigned int what)
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{
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struct msgb *msg;
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struct m2ua_msg_part *data, *link;
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struct bsc_data *bsc;
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struct m2ua_msg *m2ua;
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struct mtp_link_set *out_set;
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uint8_t buf[4096];
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bsc = fd->data;
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int rc = read(fd->fd, buf, sizeof(buf));
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if (rc <= 0) {
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LOGP(DINP, LOGL_ERROR, "Failed to read from the console.\n");
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return -1;
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}
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if (!bsc->allow_inject) {
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LOGP(DINP, LOGL_ERROR, "Injecting messages is not allowed.\n");
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return -1;
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}
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m2ua = m2ua_from_msg(rc, buf);
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if (!m2ua) {
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LOGP(DINP, LOGL_ERROR, "Failed to parse M2UA.\n");
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return -1;
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}
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if (m2ua->hdr.msg_class == M2UA_CLS_MAUP && m2ua->hdr.msg_type == M2UA_MAUP_DATA) {
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data = m2ua_msg_find_tag(m2ua, M2UA_TAG_DATA);
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if (!data) {
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LOGP(DINP, LOGL_ERROR, "MAUP Data without data.\n");
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goto exit;
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}
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if (data->len > 2048) {
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LOGP(DINP, LOGL_ERROR, "Data is too big for this configuration.\n");
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goto exit;
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}
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link = m2ua_msg_find_tag(m2ua, MUA_TAG_IDENT_TEXT);
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if (!link) {
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LOGP(DINP, LOGL_ERROR, "Interface Identifier Text is mandantory.\n");
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goto exit;
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}
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if (link->len > 255) {
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LOGP(DINP, LOGL_ERROR, "Spec violation. Ident text should be shorter than 255.\n");
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goto exit;
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}
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out_set = find_link_set(bsc, link->len, (const char *) link->dat);
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if (!out_set) {
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LOGP(DINP, LOGL_ERROR, "Identified linkset does not exist.\n");
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goto exit;
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}
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msg = msgb_alloc(2048, "inject-data");
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if (!msg) {
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LOGP(DINP, LOGL_ERROR, "Failed to allocate storage.\n");
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goto exit;
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}
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msg->l2h = msgb_put(msg, data->len);
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memcpy(msg->l2h, data->dat, data->len);
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/* we are diretcly going to the output. no checking of anything */
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if (mtp_link_set_send(out_set, msg) != 0) {
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LOGP(DINP, LOGL_ERROR, "Failed to send message.\n");
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msgb_free(msg);
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}
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}
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exit:
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m2ua_msg_free(m2ua);
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return 0;
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}
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static int inject_init(struct bsc_data *bsc)
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{
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int fd;
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struct sockaddr_in addr;
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fd = socket(PF_INET, SOCK_DGRAM, 0);
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if (fd < 0)
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return -1;
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memset(&addr, 0, sizeof(addr));
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addr.sin_family = AF_INET;
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addr.sin_port = htons(5001);
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if (bind(fd, (struct sockaddr *) &addr, sizeof(addr)) != 0) {
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LOGP(DINP, LOGL_ERROR, "Failed to bind to port 5001.\n");
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close(fd);
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return -1;
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}
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bsc->inject_fd.fd = fd;
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bsc->inject_fd.when = BSC_FD_READ;
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bsc->inject_fd.cb = inject_read_cb;
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bsc->inject_fd.data = bsc;
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if (bsc_register_fd(&bsc->inject_fd) != 0) {
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LOGP(DINP, LOGL_ERROR, "Failed to register.\n");
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close(fd);
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return -1;
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}
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return 0;
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}
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int main(int argc, char **argv)
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{
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int rc;
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struct mtp_link_set *set;
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struct mtp_link_set *m2ua_set;
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struct mtp_m2ua_link *lnk;
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struct ss7_application *app;
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thread_init();
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log_init(&log_info);
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stderr_target = log_target_create_stderr();
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log_add_target(stderr_target);
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/* enable filters */
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log_set_all_filter(stderr_target, 1);
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log_set_category_filter(stderr_target, DINP, 1, LOGL_INFO);
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log_set_category_filter(stderr_target, DSCCP, 1, LOGL_INFO);
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log_set_category_filter(stderr_target, DMSC, 1, LOGL_INFO);
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log_set_category_filter(stderr_target, DMGCP, 1, LOGL_INFO);
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log_set_print_timestamp(stderr_target, 1);
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log_set_use_color(stderr_target, 0);
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sccp_set_log_area(DSCCP);
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m2ua_set_log_area(DM2UA);
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bsc = bsc_data_create();
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if (!bsc)
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return -1;
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handle_options(argc, argv);
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signal(SIGPIPE, SIG_IGN);
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signal(SIGINT, sigint);
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srand(time(NULL));
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cell_vty_init();
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if (vty_read_config_file(config, NULL) < 0) {
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fprintf(stderr, "Failed to read the VTY config.\n");
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return -1;
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}
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rc = telnet_init(NULL, NULL, 4242);
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if (rc < 0)
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return rc;
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if (inject_init(bsc) != 0) {
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LOGP(DINP, LOGL_NOTICE, "Failed to initialize inject interface.\n");
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return -1;
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}
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app = ss7_application_alloc(bsc);
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if (!app)
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return -1;
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set = link_init(bsc);
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if (!set)
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return -1;
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bsc->m2ua_trans = sctp_m2ua_transp_create("0.0.0.0", 2904);
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if (!bsc->m2ua_trans) {
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LOGP(DINP, LOGL_ERROR, "Failed to create SCTP transport.\n");
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return -1;
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}
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m2ua_set = mtp_link_set_alloc(bsc);
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m2ua_set->dpc = 92;
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m2ua_set->opc = 9;
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m2ua_set->sccp_opc = 9;
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m2ua_set->isup_opc = 9;
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m2ua_set->ni = 3;
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m2ua_set->bsc = bsc;
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m2ua_set->pcap_fd = bsc->pcap_fd;
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m2ua_set->name = talloc_strdup(m2ua_set, "M2UA");
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/* setup things */
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set->pass_all_isup = bsc->isup_pass;
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m2ua_set->pass_all_isup = bsc->isup_pass;
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lnk = mtp_m2ua_link_create(m2ua_set);
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lnk->base.pcap_fd = -1;
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mtp_link_set_add_link(m2ua_set, (struct mtp_link *) lnk);
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ss7_application_setup(app, APP_STP,
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SS7_SET_LINKSET, 0,
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SS7_SET_LINKSET, 1);
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ss7_application_start(app);
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while (1) {
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bsc_select_main(0);
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}
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return 0;
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}
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/* dummy for links */
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int msc_connection_start(struct msc_connection *conn)
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{
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return 0;
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}
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struct msc_connection *msc_connection_num(struct bsc_data *bsc, int num)
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{
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return NULL;
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}
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void msc_mgcp_reset(struct msc_connection *msc)
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{
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}
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void msc_send_reset(struct msc_connection *bsc)
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{
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}
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void app_resources_released(struct ss7_application *ss7)
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{
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}
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void app_clear_connections(struct ss7_application *ss7)
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{
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}
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void app_forward_sccp(struct ss7_application *ss7, struct msgb *_msg, int sls)
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{
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}
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