437 lines
10 KiB
C
437 lines
10 KiB
C
/* 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 Affero General Public License as published by
|
|
* the Free Software Foundation; either version 3 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 Affero General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#include <unistd.h>
|
|
#include <stdio.h>
|
|
#include <time.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/socket.h>
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
|
|
#include <osmocom/core/application.h>
|
|
#include <osmocom/core/talloc.h>
|
|
#include <osmocom/core/select.h>
|
|
#include <osmocom/core/rate_ctr.h>
|
|
#include <osmocom/core/logging.h>
|
|
#include <osmocom/core/stats.h>
|
|
|
|
#include <osmocom/gprs/gprs_ns.h>
|
|
#include <osmocom/gprs/gprs_bssgp.h>
|
|
|
|
#include <osmocom/vty/telnet_interface.h>
|
|
#include <osmocom/vty/logging.h>
|
|
#include <osmocom/vty/stats.h>
|
|
#include <osmocom/vty/ports.h>
|
|
|
|
#include <osmocom/ctrl/control_vty.h>
|
|
|
|
#include <openbsc/signal.h>
|
|
#include <openbsc/debug.h>
|
|
#include <openbsc/vty.h>
|
|
#include <openbsc/sgsn.h>
|
|
#include <openbsc/gprs_llc.h>
|
|
#include <openbsc/gprs_gmm.h>
|
|
#include <osmocom/ctrl/control_if.h>
|
|
#include <osmocom/ctrl/ports.h>
|
|
|
|
#include <gtp.h>
|
|
|
|
#include "../../bscconfig.h"
|
|
|
|
#define _GNU_SOURCE
|
|
#include <getopt.h>
|
|
|
|
void *tall_bsc_ctx;
|
|
|
|
struct gprs_ns_inst *sgsn_nsi;
|
|
static int daemonize = 0;
|
|
const char *openbsc_copyright =
|
|
"Copyright (C) 2010 Harald Welte and On-Waves\r\n"
|
|
"License AGPLv3+: GNU AGPL version 3 or later <http://gnu.org/licenses/agpl-3.0.html>\r\n"
|
|
"This is free software: you are free to change and redistribute it.\r\n"
|
|
"There is NO WARRANTY, to the extent permitted by law.\r\n";
|
|
|
|
static struct sgsn_instance sgsn_inst = {
|
|
.config_file = "osmo_sgsn.cfg",
|
|
.cfg = {
|
|
.gtp_statedir = "./",
|
|
.auth_policy = SGSN_AUTH_POLICY_CLOSED,
|
|
},
|
|
};
|
|
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, uint16_t bvci)
|
|
{
|
|
int rc = 0;
|
|
|
|
switch (event) {
|
|
case GPRS_NS_EVT_UNIT_DATA:
|
|
/* hand the message into the BSSGP implementation */
|
|
rc = bssgp_rcvmsg(msg);
|
|
break;
|
|
default:
|
|
LOGP(DGPRS, LOGL_ERROR, "SGSN: Unknown event %u from NS\n", event);
|
|
if (msg)
|
|
msgb_free(msg);
|
|
rc = -EIO;
|
|
break;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
/* call-back function for the BSSGP protocol */
|
|
int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx)
|
|
{
|
|
struct osmo_bssgp_prim *bp;
|
|
bp = container_of(oph, struct osmo_bssgp_prim, oph);
|
|
|
|
switch (oph->sap) {
|
|
case SAP_BSSGP_LL:
|
|
switch (oph->primitive) {
|
|
case PRIM_BSSGP_UL_UD:
|
|
return gprs_llc_rcvmsg(oph->msg, bp->tp);
|
|
}
|
|
break;
|
|
case SAP_BSSGP_GMM:
|
|
switch (oph->primitive) {
|
|
case PRIM_BSSGP_GMM_SUSPEND:
|
|
return gprs_gmm_rx_suspend(bp->ra_id, bp->tlli);
|
|
case PRIM_BSSGP_GMM_RESUME:
|
|
return gprs_gmm_rx_resume(bp->ra_id, bp->tlli,
|
|
bp->u.resume.suspend_ref);
|
|
}
|
|
break;
|
|
case SAP_BSSGP_NM:
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void signal_handler(int signal)
|
|
{
|
|
fprintf(stdout, "signal %u received\n", signal);
|
|
|
|
switch (signal) {
|
|
case SIGINT:
|
|
osmo_signal_dispatch(SS_L_GLOBAL, S_L_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;
|
|
|
|
extern int bsc_vty_go_parent(struct vty *vty);
|
|
|
|
static struct vty_app_info vty_info = {
|
|
.name = "OsmoSGSN",
|
|
.version = PACKAGE_VERSION,
|
|
.go_parent_cb = bsc_vty_go_parent,
|
|
.is_config_node = bsc_vty_is_config_node,
|
|
};
|
|
|
|
static void print_help(void)
|
|
{
|
|
printf("Some useful help...\n");
|
|
printf(" -h --help\tthis text\n");
|
|
printf(" -D --daemonize\tFork the process into a background daemon\n");
|
|
printf(" -d option --debug\tenable Debugging\n");
|
|
printf(" -s --disable-color\n");
|
|
printf(" -c --config-file\tThe config file to use [%s]\n", sgsn->config_file);
|
|
printf(" -e --log-level number\tSet a global log level\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'},
|
|
{"debug", 1, 0, 'd'},
|
|
{"daemonize", 0, 0, 'D'},
|
|
{"config-file", 1, 0, 'c'},
|
|
{"disable-color", 0, 0, 's'},
|
|
{"timestamp", 0, 0, 'T'},
|
|
{"log-level", 1, 0, 'e'},
|
|
{NULL, 0, 0, 0}
|
|
};
|
|
|
|
c = getopt_long(argc, argv, "hd:Dc:sTe:",
|
|
long_options, &option_index);
|
|
if (c == -1)
|
|
break;
|
|
|
|
switch (c) {
|
|
case 'h':
|
|
//print_usage();
|
|
print_help();
|
|
exit(0);
|
|
case 's':
|
|
log_set_use_color(osmo_stderr_target, 0);
|
|
break;
|
|
case 'd':
|
|
log_parse_category_mask(osmo_stderr_target, optarg);
|
|
break;
|
|
case 'D':
|
|
daemonize = 1;
|
|
break;
|
|
case 'c':
|
|
sgsn_inst.config_file = strdup(optarg);
|
|
break;
|
|
case 'T':
|
|
log_set_print_timestamp(osmo_stderr_target, 1);
|
|
break;
|
|
case 'e':
|
|
log_set_log_level(osmo_stderr_target, atoi(optarg));
|
|
break;
|
|
default:
|
|
/* ignore */
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* default categories */
|
|
static struct log_info_cat gprs_categories[] = {
|
|
[DMM] = {
|
|
.name = "DMM",
|
|
.description = "Layer3 Mobility Management (MM)",
|
|
.color = "\033[1;33m",
|
|
.enabled = 1, .loglevel = LOGL_NOTICE,
|
|
},
|
|
[DPAG] = {
|
|
.name = "DPAG",
|
|
.description = "Paging Subsystem",
|
|
.color = "\033[1;38m",
|
|
.enabled = 1, .loglevel = LOGL_NOTICE,
|
|
},
|
|
[DMEAS] = {
|
|
.name = "DMEAS",
|
|
.description = "Radio Measurement Processing",
|
|
.enabled = 0, .loglevel = LOGL_NOTICE,
|
|
},
|
|
[DREF] = {
|
|
.name = "DREF",
|
|
.description = "Reference Counting",
|
|
.enabled = 0, .loglevel = LOGL_NOTICE,
|
|
},
|
|
[DGPRS] = {
|
|
.name = "DGPRS",
|
|
.description = "GPRS Packet Service",
|
|
.enabled = 1, .loglevel = LOGL_DEBUG,
|
|
},
|
|
[DNS] = {
|
|
.name = "DNS",
|
|
.description = "GPRS Network Service (NS)",
|
|
.enabled = 1, .loglevel = LOGL_INFO,
|
|
},
|
|
[DBSSGP] = {
|
|
.name = "DBSSGP",
|
|
.description = "GPRS BSS Gateway Protocol (BSSGP)",
|
|
.enabled = 1, .loglevel = LOGL_DEBUG,
|
|
},
|
|
[DLLC] = {
|
|
.name = "DLLC",
|
|
.description = "GPRS Logical Link Control Protocol (LLC)",
|
|
.enabled = 1, .loglevel = LOGL_DEBUG,
|
|
},
|
|
[DSNDCP] = {
|
|
.name = "DSNDCP",
|
|
.description = "GPRS Sub-Network Dependent Control Protocol (SNDCP)",
|
|
.enabled = 1, .loglevel = LOGL_DEBUG,
|
|
},
|
|
[DRANAP] = {
|
|
.name = "DRANAP",
|
|
.description = "RAN Application Part (RANAP)",
|
|
.enabled = 1, .loglevel = LOGL_DEBUG,
|
|
},
|
|
[DSUA] = {
|
|
.name = "DSUA",
|
|
.description = "SCCP User Adaptation (SUA)",
|
|
.enabled = 1, .loglevel = LOGL_DEBUG,
|
|
},
|
|
};
|
|
|
|
static const struct log_info gprs_log_info = {
|
|
.filter_fn = gprs_log_filter_fn,
|
|
.cat = gprs_categories,
|
|
.num_cat = ARRAY_SIZE(gprs_categories),
|
|
};
|
|
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
struct ctrl_handle *ctrl;
|
|
struct gsm_network dummy_network;
|
|
int rc;
|
|
|
|
srand(time(NULL));
|
|
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);
|
|
|
|
osmo_init_ignore_signals();
|
|
osmo_init_logging(&gprs_log_info);
|
|
osmo_stats_init(tall_bsc_ctx);
|
|
|
|
vty_info.copyright = openbsc_copyright;
|
|
vty_init(&vty_info);
|
|
logging_vty_add_cmds(&gprs_log_info);
|
|
osmo_stats_vty_add_cmds(&gprs_log_info);
|
|
sgsn_vty_init();
|
|
ctrl_vty_init(tall_bsc_ctx);
|
|
|
|
handle_options(argc, argv);
|
|
|
|
rate_ctr_init(tall_bsc_ctx);
|
|
|
|
gprs_ns_set_log_ss(DNS);
|
|
bssgp_set_log_ss(DBSSGP);
|
|
|
|
sgsn_nsi = gprs_ns_instantiate(&sgsn_ns_cb, tall_bsc_ctx);
|
|
if (!sgsn_nsi) {
|
|
LOGP(DGPRS, LOGL_ERROR, "Unable to instantiate NS\n");
|
|
exit(1);
|
|
}
|
|
bssgp_nsi = sgsn_inst.cfg.nsi = sgsn_nsi;
|
|
|
|
gprs_llc_init("/usr/local/lib/osmocom/crypt/");
|
|
sgsn_rate_ctr_init();
|
|
sgsn_inst_init();
|
|
|
|
gprs_ns_vty_init(bssgp_nsi);
|
|
bssgp_vty_init();
|
|
gprs_llc_vty_init();
|
|
gprs_sndcp_vty_init();
|
|
sgsn_auth_init();
|
|
sgsn_cdr_init(&sgsn_inst);
|
|
/* FIXME: register signal handler for SS_L_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);
|
|
}
|
|
|
|
/* start telnet after reading config for vty_get_bind_addr() */
|
|
LOGP(DGPRS, LOGL_NOTICE, "VTY at %s %d\n",
|
|
vty_get_bind_addr(), OSMO_VTY_PORT_SGSN);
|
|
rc = telnet_init_dynif(tall_bsc_ctx, &dummy_network,
|
|
vty_get_bind_addr(), OSMO_VTY_PORT_SGSN);
|
|
if (rc < 0)
|
|
exit(1);
|
|
|
|
/* start control interface after reading config for
|
|
* ctrl_vty_get_bind_addr() */
|
|
LOGP(DGPRS, LOGL_NOTICE, "CTRL at %s %d\n",
|
|
ctrl_vty_get_bind_addr(), OSMO_CTRL_PORT_SGSN);
|
|
ctrl = sgsn_controlif_setup(NULL, ctrl_vty_get_bind_addr(),
|
|
OSMO_CTRL_PORT_SGSN);
|
|
if (!ctrl) {
|
|
LOGP(DGPRS, LOGL_ERROR, "Failed to create CTRL interface.\n");
|
|
exit(1);
|
|
}
|
|
|
|
if (sgsn_ctrl_cmds_install() != 0) {
|
|
LOGP(DGPRS, LOGL_ERROR, "Failed to install CTRL commands.\n");
|
|
exit(1);
|
|
}
|
|
|
|
|
|
rc = sgsn_gtp_init(&sgsn_inst);
|
|
if (rc) {
|
|
LOGP(DGPRS, LOGL_FATAL, "Cannot bind/listen on GTP socket\n");
|
|
exit(2);
|
|
}
|
|
|
|
rc = gprs_subscr_init(&sgsn_inst);
|
|
if (rc < 0) {
|
|
LOGP(DGPRS, LOGL_FATAL, "Cannot set up subscriber management\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);
|
|
}
|
|
|
|
if (sgsn->cfg.dynamic_lookup) {
|
|
if (sgsn_ares_init(sgsn) != 0) {
|
|
LOGP(DGPRS, LOGL_FATAL,
|
|
"Failed to initialize c-ares(%d)\n", rc);
|
|
exit(4);
|
|
}
|
|
}
|
|
|
|
if (daemonize) {
|
|
rc = osmo_daemonize();
|
|
if (rc < 0) {
|
|
perror("Error during daemonize");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
while (1) {
|
|
rc = osmo_select_main(0);
|
|
if (rc < 0)
|
|
exit(3);
|
|
}
|
|
|
|
/* not reached */
|
|
exit(0);
|
|
}
|