202 lines
4.9 KiB
C
202 lines
4.9 KiB
C
/* GPRS SGSN Implementation */
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/* (C) 2010 by Harald Welte <laforge@gnumonks.org>
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* (C) 2010 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 <unistd.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 <getopt.h>
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#include <errno.h>
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#include <signal.h>
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#include <sys/fcntl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <osmocore/talloc.h>
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#include <osmocore/select.h>
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#include <osmocore/rate_ctr.h>
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#include <osmocom/vty/telnet_interface.h>
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#include <openbsc/signal.h>
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#include <openbsc/debug.h>
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#include <openbsc/vty.h>
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#include <openbsc/sgsn.h>
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#include <openbsc/gprs_ns.h>
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#include <openbsc/gprs_bssgp.h>
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#include <openbsc/gprs_llc.h>
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#include <gtp.h>
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#include "../../bscconfig.h"
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/* this is here for the vty... it will never be called */
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void subscr_put() { abort(); }
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#define _GNU_SOURCE
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#include <getopt.h>
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void *tall_bsc_ctx;
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struct gprs_ns_inst *sgsn_nsi;
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const char *openbsc_copyright =
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"Copyright (C) 2010 Harald Welte and On-Waves\n"
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"License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>\n"
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"This is free software: you are free to change and redistribute it.\n"
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"There is NO WARRANTY, to the extent permitted by law.\n";
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static struct sgsn_instance sgsn_inst = {
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.config_file = "osmo_sgsn.cfg",
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.cfg = {
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.gtp_statedir = "./",
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},
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};
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struct sgsn_instance *sgsn = &sgsn_inst;
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/* call-back function for the NS protocol */
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static int sgsn_ns_cb(enum gprs_ns_evt event, struct gprs_nsvc *nsvc,
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struct msgb *msg, u_int16_t bvci)
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{
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int rc = 0;
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switch (event) {
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case GPRS_NS_EVT_UNIT_DATA:
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/* hand the message into the BSSGP implementation */
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rc = gprs_bssgp_rcvmsg(msg);
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break;
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default:
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LOGP(DGPRS, LOGL_ERROR, "SGSN: Unknown event %u from NS\n", event);
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if (msg)
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talloc_free(msg);
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rc = -EIO;
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break;
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}
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return rc;
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}
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static void signal_handler(int signal)
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{
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fprintf(stdout, "signal %u received\n", signal);
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switch (signal) {
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case SIGINT:
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dispatch_signal(SS_GLOBAL, S_GLOBAL_SHUTDOWN, NULL);
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sleep(1);
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exit(0);
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break;
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case SIGABRT:
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/* in case of abort, we want to obtain a talloc report
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* and then return to the caller, who will abort the process */
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case SIGUSR1:
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talloc_report(tall_vty_ctx, stderr);
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talloc_report_full(tall_bsc_ctx, stderr);
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break;
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case SIGUSR2:
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talloc_report_full(tall_vty_ctx, stderr);
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break;
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default:
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break;
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}
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}
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/* NSI that BSSGP uses when transmitting on NS */
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extern struct gprs_ns_inst *bssgp_nsi;
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extern void *tall_msgb_ctx;
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int main(int argc, char **argv)
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{
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struct gsm_network dummy_network;
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struct log_target *stderr_target;
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struct sockaddr_in sin;
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int rc;
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tall_bsc_ctx = talloc_named_const(NULL, 0, "osmo_sgsn");
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tall_msgb_ctx = talloc_named_const(tall_bsc_ctx, 0, "msgb");
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signal(SIGINT, &signal_handler);
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signal(SIGABRT, &signal_handler);
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signal(SIGUSR1, &signal_handler);
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signal(SIGUSR2, &signal_handler);
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signal(SIGPIPE, SIG_IGN);
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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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log_set_all_filter(stderr_target, 1);
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vty_init("Osmocom SGSN", PACKAGE_VERSION, openbsc_copyright);
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logging_vty_add_cmds();
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sgsn_vty_init();
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rate_ctr_init(tall_bsc_ctx);
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rc = telnet_init(tall_bsc_ctx, &dummy_network, 4245);
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if (rc < 0)
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exit(1);
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sgsn_nsi = gprs_ns_instantiate(&sgsn_ns_cb);
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if (!sgsn_nsi) {
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LOGP(DGPRS, LOGL_ERROR, "Unable to instantiate NS\n");
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exit(1);
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}
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bssgp_nsi = sgsn_inst.cfg.nsi = sgsn_nsi;
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gprs_ns_vty_init(bssgp_nsi);
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gprs_bssgp_vty_init();
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gprs_llc_vty_init();
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/* FIXME: register signal handler for SS_NS */
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rc = sgsn_parse_config(sgsn_inst.config_file, &sgsn_inst.cfg);
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if (rc < 0) {
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LOGP(DGPRS, LOGL_FATAL, "Cannot parse config file\n");
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exit(2);
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}
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rc = sgsn_gtp_init(&sgsn_inst);
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if (rc) {
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LOGP(DGPRS, LOGL_FATAL, "Cannot bind/listen on GTP socket\n");
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exit(2);
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}
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rc = gprs_ns_nsip_listen(sgsn_nsi);
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if (rc < 0) {
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LOGP(DGPRS, LOGL_FATAL, "Cannot bind/listen on NSIP socket\n");
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exit(2);
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}
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rc = gprs_ns_frgre_listen(sgsn_nsi);
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if (rc < 0) {
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LOGP(DGPRS, LOGL_FATAL, "Cannot bind/listen GRE "
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"socket. Do you have CAP_NET_RAW?\n");
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exit(2);
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}
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while (1) {
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rc = bsc_select_main(0);
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if (rc < 0)
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exit(3);
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}
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exit(0);
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}
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