343 lines
8.8 KiB
C++
343 lines
8.8 KiB
C++
/* pcu_main.cpp
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*
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* Copyright (C) 2012 Ivan Klyuchnikov
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (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
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <pcu_l1_if.h>
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#include <gprs_rlcmac.h>
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#include <gprs_debug.h>
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#include <unistd.h>
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#include <stdbool.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 <errno.h>
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#include <getopt.h>
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#include <signal.h>
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#include <sched.h>
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#include <bts.h>
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#include <osmocom/pcu/pcuif_proto.h>
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#include "gprs_bssgp_pcu.h"
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extern "C" {
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#include "pcu_vty.h"
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#include "coding_scheme.h"
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#include <osmocom/gprs/gprs_bssgp.h>
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#include <osmocom/gprs/gprs_ns2.h>
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#include <osmocom/vty/telnet_interface.h>
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#include <osmocom/vty/command.h>
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#include <osmocom/vty/vty.h>
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#include <osmocom/vty/ports.h>
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#include <osmocom/vty/logging.h>
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#include <osmocom/vty/cpu_sched_vty.h>
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#include <osmocom/core/rate_ctr.h>
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#include <osmocom/core/select.h>
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#include <osmocom/core/application.h>
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#include <osmocom/core/msgb.h>
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#include <osmocom/core/stats.h>
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#include <osmocom/core/gsmtap.h>
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#include <osmocom/core/gsmtap_util.h>
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}
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extern struct gprs_nsvc *nsvc;
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uint16_t spoof_mcc = 0, spoof_mnc = 0;
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bool spoof_mnc_3_digits = false;
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static int config_given = 0;
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static char *config_file = strdup("osmo-pcu.cfg");
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extern struct vty_app_info pcu_vty_info;
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void *tall_pcu_ctx = NULL;
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extern void *bv_tall_ctx;
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static int quit = 0;
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static int rt_prio = -1;
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static bool daemonize = false;
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static const char *gsmtap_addr = "localhost"; // FIXME: use gengetopt's default value instead
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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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" -c --config-file Specify the filename of the config file\n"
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" -m --mcc MCC Use given MCC instead of value provided by BTS\n"
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" -n --mnc MNC Use given MNC instead of value provided by BTS\n"
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" -V --version Print version\n"
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" -D --daemonize Fork the process into a background daemon\n"
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" -i --gsmtap-ip The destination IP used for GSMTAP\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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);
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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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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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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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{ "help", 0, 0, 'h' },
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{ "config-file", 1, 0, 'c' },
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{ "mcc", 1, 0, 'm' },
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{ "mnc", 1, 0, 'n' },
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{ "version", 0, 0, 'V' },
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{ "realtime", 1, 0, 'r' },
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{ "daemonize", 0, 0, 'D' },
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{ "exit", 0, 0, 'e' },
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{ "gsmtap-ip", 1, 0, 'i' },
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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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{ 0, 0, 0, 0 }
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};
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c = getopt_long(argc, argv, "hc:m:n:Vr:De:i:",
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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 'c':
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free(config_file);
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config_file = strdup(optarg);
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config_given = 1;
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break;
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case 'm':
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spoof_mcc = atoi(optarg);
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break;
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case 'n':
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if (osmo_mnc_from_str(optarg, &spoof_mnc, &spoof_mnc_3_digits)) {
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fprintf(stderr, "Error decoding MNC '%s'\n", optarg);
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exit(1);
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}
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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 'i':
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gsmtap_addr = 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 'D':
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daemonize = true;
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break;
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case 'e':
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fprintf(stderr, "Warning: Option '-e' is deprecated!\n");
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break;
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default:
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fprintf(stderr, "Unknown option '%c'\n", c);
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exit(0);
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break;
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}
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}
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}
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void sighandler(int sigset)
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{
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if (sigset == SIGPIPE)
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return;
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fprintf(stderr, "Signal %d received.\n", sigset);
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switch (sigset) {
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case SIGINT:
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case SIGTERM:
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/* If another signal is received afterwards, the program
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* is terminated without finishing shutdown process.
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*/
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signal(SIGINT, SIG_DFL);
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signal(SIGTERM, SIG_DFL);
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signal(SIGPIPE, SIG_DFL);
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signal(SIGABRT, SIG_DFL);
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signal(SIGUSR1, SIG_DFL);
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signal(SIGUSR2, SIG_DFL);
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quit = 1;
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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_pcu_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_pcu_ctx, stderr);
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break;
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}
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}
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int main(int argc, char *argv[])
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{
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struct sched_param param;
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struct gprs_pcu *pcu;
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int rc;
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/* tall_pcu_ctx may already have been initialized in bts.cpp during early_init(). */
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if (!tall_pcu_ctx) {
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tall_pcu_ctx = talloc_named_const(NULL, 1, "Osmo-PCU context");
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if (!tall_pcu_ctx)
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return -ENOMEM;
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osmo_init_logging2(tall_pcu_ctx, &gprs_log_info);
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}
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pcu = gprs_pcu_alloc(tall_pcu_ctx);
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the_pcu = pcu; /* globally avaialable object */
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pcu->pcu_sock_path = talloc_strdup(tall_pcu_ctx, PCU_SOCK_DEFAULT);
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msgb_talloc_ctx_init(tall_pcu_ctx, 0);
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osmo_stats_init(tall_pcu_ctx);
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rate_ctr_init(tall_pcu_ctx);
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pcu_vty_info.tall_ctx = tall_pcu_ctx;
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vty_init(&pcu_vty_info);
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pcu_vty_init();
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osmo_cpu_sched_vty_init(tall_pcu_ctx);
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logging_vty_add_deprecated_subsys(tall_pcu_ctx, "bssgp");
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handle_options(argc, argv);
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if ((!!spoof_mcc) + (!!spoof_mnc) == 1) {
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fprintf(stderr, "--mcc and --mnc must be specified "
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"together.\n");
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exit(0);
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}
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pcu->gsmtap = gsmtap_source_init(gsmtap_addr, GSMTAP_UDP_PORT, 1);
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if (pcu->gsmtap)
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gsmtap_source_add_sink(pcu->gsmtap);
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else
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fprintf(stderr, "Failed to initialize GSMTAP for %s\n", gsmtap_addr);
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pcu->nsi = gprs_ns2_instantiate(tall_pcu_ctx, gprs_ns_prim_cb, NULL);
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if (!pcu->nsi) {
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LOGP(DBSSGP, LOGL_ERROR, "Failed to create NS instance\n");
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exit(1);
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}
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bssgp_set_bssgp_callback(gprs_gp_send_cb, pcu->nsi);
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gprs_ns2_vty_init(pcu->nsi);
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rc = vty_read_config_file(config_file, NULL);
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if (rc < 0 && config_given) {
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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 (rc < 0)
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fprintf(stderr, "No config file: '%s' Using default config.\n",
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config_file);
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rc = telnet_init_dynif(tall_pcu_ctx, NULL, vty_get_bind_addr(),
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OSMO_VTY_PORT_PCU);
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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->alloc_algorithm)
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pcu->alloc_algorithm = alloc_algorithm_dynamic;
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rc = pcu_l1if_open();
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if (rc < 0)
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return rc;
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signal(SIGINT, sighandler);
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signal(SIGTERM, sighandler);
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signal(SIGPIPE, sighandler);
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signal(SIGABRT, sighandler);
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signal(SIGUSR1, sighandler);
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signal(SIGUSR2, sighandler);
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osmo_init_ignore_signals();
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/* enable realtime priority for us */
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if (rt_prio != -1) {
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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 (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) {
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osmo_select_main(0);
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}
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telnet_exit();
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pcu_l1if_close();
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TALLOC_FREE(the_pcu);
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talloc_report_full(tall_pcu_ctx, stderr);
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talloc_free(tall_pcu_ctx);
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return 0;
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}
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