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-rw-r--r--src/main_udt.c363
1 files changed, 363 insertions, 0 deletions
diff --git a/src/main_udt.c b/src/main_udt.c
new file mode 100644
index 0000000..0b07da7
--- /dev/null
+++ b/src/main_udt.c
@@ -0,0 +1,363 @@
+/* Relay UDT/all SCCP messages */
+/*
+ * (C) 2010 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * (C) 2010 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_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 = "udt_relay.cfg";
+
+struct bsc_data bsc;
+extern void cell_vty_init(void);
+
+int link_c7_init(struct link_data *data) __attribute__((__weak__));
+
+int link_c7_init(struct link_data *data)
+{
+ return -1;
+}
+
+/*
+ * methods called from the MTP Level3 part
+ */
+void mtp_link_submit(struct mtp_link *link, struct msgb *msg)
+{
+ bsc.link.write(&bsc.link, msg);
+}
+
+void mtp_link_restart(struct mtp_link *link)
+{
+ LOGP(DINP, LOGL_ERROR, "Need to restart the SS7 link.\n");
+ bsc.link.reset(&bsc.link);
+}
+
+void mtp_link_sccp_down(struct mtp_link *link)
+{
+ msc_clear_queue(&bsc);
+}
+
+void mtp_link_forward_sccp(struct mtp_link *link, struct msgb *_msg, int sls)
+{
+ msc_send_direct(&bsc, _msg);
+}
+
+void bsc_link_down(struct link_data *data)
+{
+ int was_up;
+ struct mtp_link *link = data->the_link;
+
+ link->available = 0;
+ was_up = link->sccp_up;
+ mtp_link_stop(link);
+
+ data->clear_queue(data);
+
+ /* clear pending messages from the MSC */
+ msc_clear_queue(data->bsc);
+
+ /* If we have an A link send a reset to the MSC */
+ msc_send_reset(data->bsc);
+}
+
+void bsc_link_up(struct link_data *data)
+{
+ data->the_link->available = 1;
+ mtp_link_reset(data->the_link);
+}
+
+static void print_usage()
+{
+ printf("Usage: cellmgr_ng\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)
+ bsc.link.shutdown(&bsc.link);
+ exit(0);
+
+out:
+ pthread_mutex_unlock(&exit_mutex);
+}
+
+static void sigusr2()
+{
+ printf("Closing the MSC connection on demand.\n");
+ msc_close_connection(&bsc);
+}
+
+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.link.pcap_fd >= 0)
+ close(bsc.link.pcap_fd);
+ bsc.link.pcap_fd = open(optarg, O_WRONLY | O_TRUNC | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP| S_IROTH);
+ if (bsc.link.pcap_fd < 0) {
+ fprintf(stderr, "Failed to open PCAP file.\n");
+ exit(0);
+ }
+ mtp_pcap_write_header(bsc.link.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;
+ }
+ }
+}
+
+static void start_rest(void *start)
+{
+ bsc.setup = 1;
+
+ if (msc_init(&bsc, 0) != 0) {
+ fprintf(stderr, "Failed to init MSC part.\n");
+ exit(3);
+ }
+
+ bsc.link.start(&bsc.link);
+}
+
+
+int main(int argc, char **argv)
+{
+ int rc;
+ INIT_LLIST_HEAD(&bsc.sccp_connections);
+
+ bsc.dpc = 1;
+ bsc.opc = 0;
+ bsc.udp_port = 3456;
+ bsc.udp_ip = NULL;
+ bsc.src_port = 1313;
+
+ mtp_link_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.link.pcap_fd = -1;
+ bsc.link.udp.reset_timeout = 180;
+ bsc.ping_time = 20;
+ bsc.pong_time = 5;
+ bsc.msc_time = 20;
+
+ handle_options(argc, argv);
+
+ signal(SIGPIPE, SIG_IGN);
+ signal(SIGINT, sigint);
+ signal(SIGUSR2, sigusr2);
+ 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;
+
+ bsc.link.the_link = mtp_link_alloc();
+ bsc.link.the_link->dpc = bsc.dpc;
+ bsc.link.the_link->opc = bsc.opc;
+ bsc.link.the_link->link = 0;
+ bsc.link.the_link->sltm_once = bsc.once;
+ bsc.link.bsc = &bsc;
+
+ if (bsc.udp_ip) {
+ LOGP(DINP, LOGL_NOTICE, "Using UDP MTP mode.\n");
+
+ /* setup SNMP first, it is blocking */
+ bsc.link.udp.session = snmp_mtp_session_create(bsc.udp_ip);
+ if (!bsc.link.udp.session)
+ return -1;
+
+ /* now connect to the transport */
+ if (link_udp_init(&bsc.link, bsc.src_port, bsc.udp_ip, bsc.udp_port) != 0)
+ return -1;
+
+ /*
+ * We will ask the MTP link to be taken down for two
+ * timeouts of the BSC to make sure we are missing the
+ * SLTM and it begins a reset. Then we will take it up
+ * again and do the usual business.
+ */
+ snmp_mtp_deactivate(bsc.link.udp.session);
+ bsc.start_timer.cb = start_rest;
+ bsc.start_timer.data = &bsc;
+ bsc_schedule_timer(&bsc.start_timer, bsc.link.udp.reset_timeout, 0);
+ LOGP(DMSC, LOGL_NOTICE, "Making sure SLTM will timeout.\n");
+ } else {
+ LOGP(DINP, LOGL_NOTICE, "Using NexusWare C7 input.\n");
+ if (link_c7_init(&bsc.link) != 0)
+ return -1;
+
+ /* give time to things to start*/
+ bsc.start_timer.cb = start_rest;
+ bsc.start_timer.data = &bsc;
+ bsc_schedule_timer(&bsc.start_timer, 30, 0);
+ LOGP(DMSC, LOGL_NOTICE, "Waiting to continue to startup.\n");
+ }
+
+
+ while (1) {
+ bsc_select_main(0);
+ }
+
+ return 0;
+}
+
+void release_bsc_resources(struct bsc_data *bsc)
+{
+ /* clear pending messages from the MSC */
+ msc_clear_queue(bsc);
+}
+
+struct msgb *create_sccp_rlc(struct sccp_source_reference *src_ref,
+ struct sccp_source_reference *dst)
+{
+ abort();
+ return NULL;
+}
+
+struct msgb *create_reset()
+{
+ abort();
+ return NULL;
+}
+
+void update_con_state(struct mtp_link *link, int rc, struct sccp_parse_result *res, struct msgb *msg, int from_msc, int sls)
+{
+ LOGP(DMSC, LOGL_ERROR, "Should not be called.\n");
+ return;
+}
+
+unsigned int sls_for_src_ref(struct sccp_source_reference *ref)
+{
+ return 13;
+}
+
+int bsc_ussd_handle_in_msg(struct bsc_data *bsc, struct sccp_parse_result *res, struct msgb *msg)
+{
+ return 0;
+}
+
+int bsc_ussd_handle_out_msg(struct bsc_data *bsc, struct sccp_parse_result *res, struct msgb *msg)
+{
+ return 0;
+}
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