stp: Begin to implement a signalling transfer point
This is creating a new application that will be a signalling
transfer point. Right now it is a stripped down version of
the udt_relay, which is a stripped down version of cellmgr_ng.
diff --git a/src/main_stp.c b/src/main_stp.c
new file mode 100644
index 0000000..568a4a6
--- /dev/null
+++ b/src/main_stp.c
@@ -0,0 +1,239 @@
+/* Relay UDT/all SCCP messages */
+/*
+ * (C) 2010-2011 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * (C) 2010-2011 by On-Waves
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <mtp_data.h>
+#include <mtp_level3.h>
+#include <mtp_pcap.h>
+#include <thread.h>
+#include <bsc_data.h>
+#include <snmp_mtp.h>
+#include <cellmgr_debug.h>
+
+#include <osmocore/talloc.h>
+
+#include <osmocom/vty/vty.h>
+#include <osmocom/vty/telnet_interface.h>
+
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include <fcntl.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <unistd.h>
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+#include <getopt.h>
+
+#undef PACKAGE_NAME
+#undef PACKAGE_VERSION
+#undef PACKAGE_BUGREPORT
+#undef PACKAGE_TARNAME
+#undef PACKAGE_STRING
+#include <cellmgr_config.h>
+
+static struct log_target *stderr_target;
+
+static char *config = "osmo_stp.cfg";
+
+struct bsc_data bsc;
+extern void cell_vty_init(void);
+
+/*
+ * methods called from the MTP Level3 part
+ */
+void mtp_link_set_forward_sccp(struct mtp_link_set *link, struct msgb *_msg, int sls)
+{
+}
+
+void mtp_linkset_down(struct mtp_link_set *set)
+{
+ set->available = 0;
+ mtp_link_set_stop(set);
+}
+
+void mtp_linkset_up(struct mtp_link_set *set)
+{
+ set->available = 1;
+ mtp_link_set_reset(set);
+}
+
+static void print_usage()
+{
+ printf("Usage: osmo-stp\n");
+}
+
+static void sigint()
+{
+ static pthread_mutex_t exit_mutex = PTHREAD_MUTEX_INITIALIZER;
+ static int handled = 0;
+
+ /* failed to lock */
+ if (pthread_mutex_trylock(&exit_mutex) != 0)
+ return;
+ if (handled)
+ goto out;
+
+ printf("Terminating.\n");
+ handled = 1;
+ if (bsc.setup)
+ link_shutdown_all(bsc.link_set);
+ exit(0);
+
+out:
+ pthread_mutex_unlock(&exit_mutex);
+}
+
+static void print_help()
+{
+ printf(" Some useful help...\n");
+ printf(" -h --help this text\n");
+ printf(" -c --config=CFG The config file to use.\n");
+ printf(" -p --pcap=FILE. Write MSUs to the PCAP file.\n");
+ printf(" -c --once. Send the SLTM msg only once.\n");
+ printf(" -v --version. Print the version number\n");
+}
+
+static void handle_options(int argc, char **argv)
+{
+ while (1) {
+ int option_index = 0, c;
+ static struct option long_options[] = {
+ {"help", 0, 0, 'h'},
+ {"config", 1, 0, 'c'},
+ {"pcap", 1, 0, 'p'},
+ {"version", 0, 0, 0},
+ {0, 0, 0, 0},
+ };
+
+ c = getopt_long(argc, argv, "hc:p:v",
+ long_options, &option_index);
+ if (c == -1)
+ break;
+
+ switch (c) {
+ case 'h':
+ print_usage();
+ print_help();
+ exit(0);
+ case 'p':
+ if (bsc.pcap_fd >= 0)
+ close(bsc.pcap_fd);
+ bsc.pcap_fd = open(optarg, O_WRONLY | O_TRUNC | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP| S_IROTH);
+ if (bsc.pcap_fd < 0) {
+ fprintf(stderr, "Failed to open PCAP file.\n");
+ exit(0);
+ }
+ mtp_pcap_write_header(bsc.pcap_fd);
+ break;
+ case 'c':
+ config = optarg;
+ break;
+ case 'v':
+ printf("This is %s version %s.\n", PACKAGE, VERSION);
+ exit(0);
+ break;
+ default:
+ fprintf(stderr, "Unknown option.\n");
+ break;
+ }
+ }
+}
+
+int main(int argc, char **argv)
+{
+ int rc;
+ INIT_LLIST_HEAD(&bsc.sccp_connections);
+
+ bsc.dpc = 1;
+ bsc.opc = 0;
+ bsc.sccp_opc = -1;
+ bsc.udp_port = 3456;
+ bsc.udp_ip = NULL;
+ bsc.src_port = 1313;
+ bsc.ni_ni = MTP_NI_NATION_NET;
+ bsc.ni_spare = 0;
+
+ mtp_link_set_init();
+ thread_init();
+
+ log_init(&log_info);
+ stderr_target = log_target_create_stderr();
+ log_add_target(stderr_target);
+
+ /* enable filters */
+ log_set_all_filter(stderr_target, 1);
+ log_set_category_filter(stderr_target, DINP, 1, LOGL_INFO);
+ log_set_category_filter(stderr_target, DSCCP, 1, LOGL_INFO);
+ log_set_category_filter(stderr_target, DMSC, 1, LOGL_INFO);
+ log_set_category_filter(stderr_target, DMGCP, 1, LOGL_INFO);
+ log_set_print_timestamp(stderr_target, 1);
+ log_set_use_color(stderr_target, 0);
+
+ sccp_set_log_area(DSCCP);
+
+ bsc.setup = 0;
+ bsc.msc_address = "127.0.0.1";
+ bsc.pcap_fd = -1;
+ bsc.udp_reset_timeout = 180;
+ bsc.ping_time = 20;
+ bsc.pong_time = 5;
+ bsc.msc_time = 20;
+ bsc.forward_only = 1;
+
+ handle_options(argc, argv);
+
+ signal(SIGPIPE, SIG_IGN);
+ signal(SIGINT, sigint);
+ srand(time(NULL));
+
+ cell_vty_init();
+ if (vty_read_config_file(config, NULL) < 0) {
+ fprintf(stderr, "Failed to read the VTY config.\n");
+ return -1;
+ }
+
+ rc = telnet_init(NULL, NULL, 4242);
+ if (rc < 0)
+ return rc;
+
+ if (link_init(&bsc) != 0)
+ return -1;
+
+ while (1) {
+ bsc_select_main(0);
+ }
+
+ return 0;
+}
+
+/* dummy for links */
+int msc_init(struct bsc_data *data, int dummy)
+{
+ return 0;
+}
+