385 lines
8.8 KiB
C
385 lines
8.8 KiB
C
/* GTP Hub main program */
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/* (C) 2015 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
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* All Rights Reserved
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*
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* Author: Neels Hofmeyr
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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 Affero 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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#include <unistd.h>
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#include <signal.h>
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#include <string.h>
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#include <errno.h>
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#include <inttypes.h>
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#include <sys/stat.h>
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#define _GNU_SOURCE
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#include <getopt.h>
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#include <osmocom/core/signal.h>
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#include <osmocom/core/application.h>
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#include <osmocom/core/logging.h>
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#include <osmocom/core/utils.h>
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#include <osmocom/core/rate_ctr.h>
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#include <osmocom/core/msgb.h>
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#include <osmocom/vty/logging.h>
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#include <osmocom/vty/telnet_interface.h>
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#include <osmocom/vty/ports.h>
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#include <osmocom/vty/misc.h>
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#include <osmocom/sgsn/debug.h>
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#include <osmocom/gtphub/gtphub.h>
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#include <osmocom/sgsn/vty.h>
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#include "../../config.h"
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#if BUILD_IU
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#include <osmocom/sigtran/osmo_ss7.h>
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#endif
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extern void *osmo_gtphub_ctx;
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void *tall_sgsn_ctx;
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const char *gtphub_copyright =
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"Copyright (C) 2015 sysmocom s.f.m.c GmbH <info@sysmocom.de>\r\n"
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"License AGPLv3+: GNU AGPL version 2 or later <http://gnu.org/licenses/agpl-3.0.html>\r\n"
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"This is free software: you are free to change and redistribute it.\r\n"
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"There is NO WARRANTY, to the extent permitted by law.\r\n";
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static struct log_info_cat gtphub_categories[] = {
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[DGTPHUB] = {
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.name = "DGTPHUB",
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.description = "GTP Hub",
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.color = "\033[1;33m",
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.enabled = 1,
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.loglevel = LOGL_INFO,
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},
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};
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int gtphub_log_filter_fn(const struct log_context *ctx,
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struct log_target *tar)
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{
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return 0;
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}
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static const struct log_info gtphub_log_info = {
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.filter_fn = gtphub_log_filter_fn,
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.cat = gtphub_categories,
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.num_cat = ARRAY_SIZE(gtphub_categories),
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};
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void log_cfg(struct gtphub_cfg *cfg)
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{
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int side_idx, plane_idx;
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for_each_side_and_plane(side_idx, plane_idx) {
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struct gtphub_cfg_addr *a;
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a = &cfg->to_gsns[side_idx][plane_idx].bind;
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LOGP(DGTPHUB, LOGL_NOTICE,
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"to-%ss bind, %s: %s port %d\n",
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gtphub_side_idx_names[side_idx],
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gtphub_plane_idx_names[plane_idx],
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a->addr_str, a->port);
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}
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}
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static void signal_handler(int signum)
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{
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fprintf(stdout, "signal %d 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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osmo_signal_dispatch(SS_L_GLOBAL, S_L_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 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(osmo_gtphub_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(osmo_gtphub_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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static struct vty_app_info vty_info = {
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.name = "OsmoGTPhub",
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.version = PACKAGE_VERSION,
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#if BUILD_IU
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.go_parent_cb = osmo_ss7_vty_go_parent,
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#endif
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};
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struct cmdline_cfg {
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const char *config_file;
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const char *restart_counter_file;
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int daemonize;
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};
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static uint8_t next_restart_count(const char *path)
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{
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int umask_was = umask(022);
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uint8_t counter = 0;
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FILE *f = fopen(path, "r");
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if (f) {
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int rc = fscanf(f, "%hhu", &counter);
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if (rc != 1)
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goto failed_to_read;
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char c;
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while (fread(&c, 1, 1, f) > 0) {
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switch (c) {
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case ' ':
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case '\t':
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case '\n':
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case '\r':
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break;
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default:
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goto failed_to_read;
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}
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}
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fclose(f);
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}
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counter ++;
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f = fopen(path, "w");
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if (!f)
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goto failed_to_write;
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if (fprintf(f, "%" PRIu8 "\n", counter) < 2)
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goto failed_to_write;
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if (fclose(f)) {
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f = NULL;
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goto failed_to_write;
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}
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umask(umask_was);
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LOGP(DGTPHUB, LOGL_NOTICE, "Restarted with counter %hhu\n", counter);
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return counter;
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failed_to_read:
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fclose(f);
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umask(umask_was);
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LOGP(DGTPHUB, LOGL_FATAL, "Restart counter file cannot be parsed:"
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" %s\n", path);
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exit(1);
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failed_to_write:
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if (f)
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fclose(f);
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umask(umask_was);
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LOGP(DGTPHUB, LOGL_FATAL, "Restart counter file cannot be written:"
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" %s\n", path);
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exit(1);
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}
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static void print_help(struct cmdline_cfg *ccfg)
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{
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printf("gtphub commandline options\n");
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printf(" -h,--help This text.\n");
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printf(" -D,--daemonize Fork the process into a background daemon.\n");
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printf(" -d,--debug <cat> Enable Debugging for this category.\n");
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printf(" Pass '-d list' to get a category listing.\n");
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printf(" -s,--disable-color\n");
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printf(" -c,--config-file <path> The config file to use [%s].\n",
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ccfg->config_file);
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printf(" -e,--log-level <nr> Set a global log level.\n");
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printf(" -r,--restart-file <path> File for counting restarts [%s].\n",
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ccfg->restart_counter_file);
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printf(" -V,--version Print the version.\n");
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}
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static void list_categories(void)
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{
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printf("Available debug categories:\n");
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int i;
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for (i = 0; i < gtphub_log_info.num_cat; ++i) {
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if (!gtphub_log_info.cat[i].name)
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continue;
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printf("%s\n", gtphub_log_info.cat[i].name);
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}
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}
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static void handle_options(struct cmdline_cfg *ccfg, int argc, char **argv)
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{
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while (1) {
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int option_index = 0, c;
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static struct option long_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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{"log-level", 1, 0, 'e'},
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{"restart-file", 1, 0, 'r'},
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{ "version", 0, 0, 'V' },
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{NULL, 0, 0, 0}
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};
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c = getopt_long(argc, argv, "hd:Dc:sTe:r:V",
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long_options, &option_index);
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if (c == -1) {
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if (optind < argc) {
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LOGP(DGTPHUB, LOGL_FATAL,
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"Excess commandline arguments ('%s').\n",
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argv[optind]);
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exit(2);
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}
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break;
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}
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switch (c) {
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case 'h':
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//print_usage();
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print_help(ccfg);
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exit(0);
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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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if (strcmp("list", optarg) == 0) {
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list_categories();
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exit(0);
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} else
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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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ccfg->daemonize = 1;
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break;
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case 'c':
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ccfg->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 '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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ccfg->restart_counter_file = optarg;
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break;
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case 'V':
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print_version(1);
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exit(EXIT_SUCCESS);
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break;
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default:
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LOGP(DGTPHUB, LOGL_FATAL, "Invalid command line argument, abort.\n");
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exit(1);
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break;
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}
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}
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if (argc > optind) {
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fprintf(stderr, "Unsupported positional arguments on command line\n");
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exit(2);
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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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int rc;
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struct cmdline_cfg _ccfg;
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struct cmdline_cfg *ccfg = &_ccfg;
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memset(ccfg, '\0', sizeof(*ccfg));
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ccfg->config_file = "./gtphub.conf";
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ccfg->restart_counter_file = "./gtphub_restart_count";
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struct gtphub_cfg _cfg;
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struct gtphub_cfg *cfg = &_cfg;
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memset(cfg, '\0', sizeof(*cfg));
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struct gtphub _hub;
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struct gtphub *hub = &_hub;
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osmo_gtphub_ctx = talloc_named_const(NULL, 0, "osmo_gtphub");
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msgb_talloc_ctx_init(osmo_gtphub_ctx, 0);
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vty_info.tall_ctx = osmo_gtphub_ctx;
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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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osmo_init_logging2(osmo_gtphub_ctx, >phub_log_info);
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vty_info.copyright = gtphub_copyright;
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vty_init(&vty_info);
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logging_vty_add_cmds();
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osmo_talloc_vty_add_cmds();
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gtphub_vty_init(hub, cfg);
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rate_ctr_init(osmo_gtphub_ctx);
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handle_options(ccfg, argc, argv);
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rc = gtphub_cfg_read(cfg, ccfg->config_file);
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if (rc < 0) {
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LOGP(DGTPHUB, LOGL_FATAL, "Cannot parse config file '%s'\n",
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ccfg->config_file);
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exit(2);
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}
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/* start telnet after reading config for vty_get_bind_addr() */
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rc = telnet_init_default(osmo_gtphub_ctx, NULL, OSMO_VTY_PORT_GTPHUB);
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if (rc < 0)
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exit(1);
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if (gtphub_start(hub, cfg,
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next_restart_count(ccfg->restart_counter_file))
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!= 0)
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return -1;
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log_cfg(cfg);
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if (ccfg->daemonize) {
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rc = osmo_daemonize();
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if (rc < 0) {
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LOGP(DGTPHUB, LOGL_FATAL, "Error during daemonize");
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exit(1);
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}
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}
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while (1) {
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rc = osmo_select_main(0);
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if (rc < 0)
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exit(3);
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}
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/* not reached */
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exit(0);
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}
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