428 lines
11 KiB
C
428 lines
11 KiB
C
/* Main program for Osmocom BTS */
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/* (C) 2011-2016 by Harald Welte <laforge@gnumonks.org>
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*
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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 Affero General Public License as published by
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* the Free Software Foundation; either version 3 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 Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <stdint.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <getopt.h>
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#include <limits.h>
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#include <sys/signal.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sched.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <osmocom/core/stats.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/core/application.h>
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#include <osmocom/vty/telnet_interface.h>
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#include <osmocom/vty/logging.h>
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#include <osmocom/vty/stats.h>
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#include <osmocom/vty/misc.h>
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#include <osmocom/vty/cpu_sched_vty.h>
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#include <osmocom/core/gsmtap_util.h>
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#include <osmocom/core/gsmtap.h>
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#include <osmo-bts/gsm_data.h>
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#include <osmo-bts/phy_link.h>
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#include <osmo-bts/logging.h>
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#include <osmo-bts/abis.h>
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#include <osmo-bts/bts.h>
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#include <osmo-bts/vty.h>
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#include <osmo-bts/l1sap.h>
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#include <osmo-bts/bts_model.h>
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#include <osmo-bts/pcu_if.h>
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#include <osmo-bts/control_if.h>
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#include <osmocom/ctrl/control_if.h>
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#include <osmocom/ctrl/ports.h>
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#include <osmocom/ctrl/control_vty.h>
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#include <osmo-bts/oml.h>
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static int quit = 0;
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static const char *config_file = "osmo-bts.cfg";
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static int daemonize = 0;
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static int rt_prio = -1;
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static char *gsmtap_ip = 0;
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extern int g_vty_port_num;
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static bool vty_test_mode = false;
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static void print_help()
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{
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printf( "Some useful options:\n"
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" -h --help this text\n"
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" -d --debug MASK Enable debugging (e.g. -d DRSL:DOML:DLAPDM)\n"
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" -D --daemonize For the process into a background daemon\n"
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" -c --config-file Specify the filename of the config file\n"
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" -s --disable-color Don't use colors in stderr log output\n"
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" -T --timestamp Prefix every log line with a timestamp\n"
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" -V --version Print version information and exit\n"
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" -e --log-level Set a global log-level\n"
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"\nVTY reference generation:\n"
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" --vty-ref-mode MODE VTY reference generation mode (e.g. 'expert').\n"
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" --vty-ref-xml Generate the VTY reference XML output and exit.\n"
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"\nRegression testing:\n"
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" --vty-test VTY test mode. Do not connect to BSC, do not exit.\n"
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);
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bts_model_print_help();
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}
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static void handle_long_options(const char *prog_name, const int long_option)
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{
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static int vty_ref_mode = VTY_REF_GEN_MODE_DEFAULT;
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switch (long_option) {
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case 1:
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vty_ref_mode = get_string_value(vty_ref_gen_mode_names, optarg);
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if (vty_ref_mode < 0) {
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fprintf(stderr, "%s: Unknown VTY reference generation "
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"mode '%s'\n", prog_name, optarg);
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exit(2);
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}
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break;
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case 2:
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fprintf(stderr, "Generating the VTY reference in mode '%s' (%s)\n",
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get_value_string(vty_ref_gen_mode_names, vty_ref_mode),
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get_value_string(vty_ref_gen_mode_desc, vty_ref_mode));
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vty_dump_xml_ref_mode(stdout, (enum vty_ref_gen_mode) vty_ref_mode);
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exit(0);
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case 3:
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vty_test_mode = true;
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break;
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default:
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fprintf(stderr, "%s: error parsing cmdline options\n", prog_name);
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exit(2);
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}
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}
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/* FIXME: finally get some option parsing code into libosmocore */
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static void handle_options(int argc, char **argv)
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{
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char *argv_out[argc];
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int argc_out = 0;
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argv_out[argc_out++] = argv[0];
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/* disable generation of error messages on encountering unknown
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* options */
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opterr = 0;
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while (1) {
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int option_idx = 0, c;
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static int long_option = 0;
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static const struct option long_options[] = {
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/* FIXME: all those are generic Osmocom app options */
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{ "help", 0, 0, 'h' },
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{ "debug", 1, 0, 'd' },
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{ "daemonize", 0, 0, 'D' },
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{ "config-file", 1, 0, 'c' },
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{ "disable-color", 0, 0, 's' },
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{ "timestamp", 0, 0, 'T' },
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{ "version", 0, 0, 'V' },
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{ "log-level", 1, 0, 'e' },
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/* FIXME: generic BTS app options */
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{ "gsmtap-ip", 1, 0, 'i' },
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{ "trx-num", 1, 0, 't' },
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{ "realtime", 1, 0, 'r' },
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{ "vty-ref-mode", 1, &long_option, 1 },
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{ "vty-ref-xml", 0, &long_option, 2 },
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{ "vty-test", 0, &long_option, 3 },
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{ 0, 0, 0, 0 }
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};
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c = getopt_long(argc, argv, "-hc:d:Dc:sTVe:i:t:r:",
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long_options, &option_idx);
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if (c == -1)
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break;
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switch (c) {
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case 'h':
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print_help();
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exit(0);
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break;
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case 0:
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handle_long_options(argv[0], long_option);
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break;
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case 's':
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log_set_use_color(osmo_stderr_target, 0);
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break;
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case 'd':
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log_parse_category_mask(osmo_stderr_target, optarg);
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break;
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case 'D':
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daemonize = 1;
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break;
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case 'c':
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config_file = optarg;
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break;
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case 'T':
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log_set_print_timestamp(osmo_stderr_target, 1);
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break;
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case 'V':
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print_version(1);
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exit(0);
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break;
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case 'e':
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log_set_log_level(osmo_stderr_target, atoi(optarg));
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break;
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case 'r':
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rt_prio = atoi(optarg);
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fprintf(stderr, "Command line argument '-r' is deprecated, use VTY "
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"cpu-sched node setting 'policy rr %d' instead.\n", rt_prio);
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break;
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case 'i':
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gsmtap_ip = optarg;
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fprintf(stderr, "Command line argument '-i' is deprecated, use VTY "
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"parameter 'gsmtap-remote-host %s' instead.\n", gsmtap_ip);
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break;
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case 't':
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fprintf(stderr, "Command line argument '-t' is deprecated and does nothing, "
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"TRX number is calculated from the VTY automatically.\n");
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break;
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case '?':
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case 1:
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/* prepare argv[] for bts_model */
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argv_out[argc_out++] = argv[optind-1];
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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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/* re-set opt-ind for new parsig round */
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optind = 1;
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/* enable error-checking for the following getopt call */
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opterr = 1;
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if (bts_model_handle_options(argc_out, argv_out)) {
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print_help();
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exit(1);
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}
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}
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/* FIXME: remove this once we add multi-BTS support */
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struct gsm_bts *g_bts = NULL;
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static void signal_handler(int signum)
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{
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fprintf(stderr, "signal %u received\n", signum);
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switch (signum) {
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case SIGINT:
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case SIGTERM:
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if (!quit) {
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oml_tx_failure_event_rep(&g_bts->mo,
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NM_SEVER_CRITICAL, OSMO_EVT_CRIT_PROC_STOP,
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"BTS: SIGINT received -> shutdown");
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bts_shutdown_ext(g_bts, "SIGINT", true, false);
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}
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quit++;
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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 and
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* then run default SIGABRT handler, who will generate coredump
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* and abort the process. abort() should do this for us after we
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* return, but program wouldn't exit if an external SIGABRT is
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* received.
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*/
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talloc_report_full(tall_bts_ctx, stderr);
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signal(SIGABRT, SIG_DFL);
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raise(SIGABRT);
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break;
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case SIGUSR1:
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case SIGUSR2:
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talloc_report_full(tall_bts_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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int bts_main(int argc, char **argv)
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{
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struct gsm_bts_trx *trx;
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int rc;
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/* Track the use of talloc NULL memory contexts */
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talloc_enable_null_tracking();
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tall_bts_ctx = talloc_named_const(NULL, 1, "OsmoBTS context");
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msgb_talloc_ctx_init(tall_bts_ctx, 100*1024);
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bts_vty_info.tall_ctx = tall_bts_ctx;
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osmo_init_logging2(tall_bts_ctx, &bts_log_info);
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osmo_stats_init(tall_bts_ctx);
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vty_init(&bts_vty_info);
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ctrl_vty_init(tall_bts_ctx);
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osmo_cpu_sched_vty_init(tall_bts_ctx);
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rate_ctr_init(tall_bts_ctx);
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logging_vty_add_cmds();
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osmo_talloc_vty_add_cmds();
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osmo_stats_vty_add_cmds();
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osmo_fsm_vty_add_cmds();
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bts_vty_init(tall_bts_ctx);
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e1inp_vty_init();
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logging_vty_add_deprecated_subsys(tall_bts_ctx, "sum");
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handle_options(argc, argv);
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fprintf(stderr, "((*))\n |\n / \\ OsmoBTS\n");
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if (vty_test_mode)
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fprintf(stderr, "--- VTY test mode: not connecting to BSC, not exiting ---\n");
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g_bts = gsm_bts_alloc(tall_bts_ctx, 0);
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if (!g_bts) {
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fprintf(stderr, "Failed to create BTS structure\n");
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exit(1);
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}
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/* enable realtime priority for us */
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if (rt_prio != -1) {
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struct sched_param param;
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memset(¶m, 0, sizeof(param));
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param.sched_priority = rt_prio;
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rc = sched_setscheduler(getpid(), SCHED_RR, ¶m);
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if (rc != 0) {
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fprintf(stderr, "Setting SCHED_RR priority(%d) failed: %s\n",
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param.sched_priority, strerror(errno));
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exit(1);
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}
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}
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if (bts_init(g_bts) < 0) {
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fprintf(stderr, "unable to open bts\n");
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exit(1);
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}
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abis_init(g_bts);
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rc = vty_read_config_file(config_file, NULL);
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if (rc < 0) {
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fprintf(stderr, "Failed to parse the config file: '%s'\n",
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config_file);
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exit(1);
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}
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if (!phy_link_by_num(0)) {
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fprintf(stderr, "You need to configure at least phy0\n");
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exit(1);
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}
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llist_for_each_entry(trx, &g_bts->trx_list, list) {
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if (!trx->pinst) {
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fprintf(stderr, "TRX %u has no associated PHY instance\n",
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trx->nr);
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exit(1);
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}
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}
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/* Accept a GSMTAP host from VTY config, but a commandline option overrides that. */
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if (gsmtap_ip != NULL) {
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if (g_bts->gsmtap.remote_host != NULL) {
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LOGP(DLGLOBAL, LOGL_NOTICE,
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"Command line argument '-i %s' overrides "
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"'gsmtap-remote-host %s' from the config file\n",
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gsmtap_ip, g_bts->gsmtap.remote_host);
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talloc_free(g_bts->gsmtap.remote_host);
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}
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g_bts->gsmtap.remote_host = talloc_strdup(g_bts, gsmtap_ip);
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}
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/* TODO: move this to gsm_bts_alloc() */
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if (g_bts->gsmtap.remote_host != NULL) {
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LOGP(DLGLOBAL, LOGL_NOTICE,
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"Setting up GSMTAP Um forwarding to '%s:%u'\n",
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g_bts->gsmtap.remote_host, GSMTAP_UDP_PORT);
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g_bts->gsmtap.inst = gsmtap_source_init(g_bts->gsmtap.remote_host,
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GSMTAP_UDP_PORT, 1);
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if (g_bts->gsmtap.inst == NULL) {
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fprintf(stderr, "Failed during gsmtap_source_init()\n");
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exit(1);
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}
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gsmtap_source_add_sink(g_bts->gsmtap.inst);
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}
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bts_controlif_setup(g_bts, ctrl_vty_get_bind_addr(), OSMO_CTRL_PORT_BTS);
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rc = telnet_init_dynif(tall_bts_ctx, NULL, vty_get_bind_addr(),
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g_vty_port_num);
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if (rc < 0) {
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fprintf(stderr, "Error initializing telnet\n");
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exit(1);
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}
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if (pcu_sock_init(g_bts->pcu.sock_path)) {
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fprintf(stderr, "PCU L1 socket failed\n");
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exit(1);
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}
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signal(SIGINT, &signal_handler);
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signal(SIGTERM, &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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osmo_init_ignore_signals();
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if (bts_osmux_open(g_bts) < 0) {
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fprintf(stderr, "Osmux setup failed\n");
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exit(1);
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}
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if (vty_test_mode) {
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/* Just select-loop without connecting to the BSC, don't exit. This allows running tests on the VTY
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* telnet port. */
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while (!quit) {
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log_reset_context();
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osmo_select_main(0);
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}
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return EXIT_SUCCESS;
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}
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if (abis_open(g_bts, "osmo-bts") != 0)
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exit(1);
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rc = phy_links_open();
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if (rc < 0) {
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fprintf(stderr, "unable to open PHY link(s)\n");
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exit(2);
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}
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if (daemonize) {
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rc = osmo_daemonize();
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if (rc < 0) {
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perror("Error during daemonize");
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exit(1);
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}
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}
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while (quit < 2) {
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log_reset_context();
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osmo_select_main(0);
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}
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return EXIT_SUCCESS;
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}
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