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