| /* NS-over-IP proxy */ |
| |
| /* (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 <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/stats.h> |
| #include <osmocom/core/signal.h> |
| |
| #include <osmocom/gprs/gprs_ns2.h> |
| #include <osmocom/gprs/gprs_bssgp.h> |
| |
| #include "debug.h" |
| #include <osmocom/gbproxy/gb_proxy.h> |
| |
| #include <osmocom/ctrl/control_vty.h> |
| #include <osmocom/ctrl/control_if.h> |
| #include <osmocom/ctrl/ports.h> |
| |
| #include <osmocom/vty/command.h> |
| #include <osmocom/vty/telnet_interface.h> |
| #include <osmocom/vty/logging.h> |
| #include <osmocom/vty/stats.h> |
| #include <osmocom/vty/ports.h> |
| #include <osmocom/vty/misc.h> |
| #include <osmocom/vty/cpu_sched_vty.h> |
| |
| #include "../bscconfig.h" |
| |
| #define _GNU_SOURCE |
| #include <getopt.h> |
| |
| void *tall_sgsn_ctx; |
| |
| 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"; |
| |
| #define CONFIG_FILE_DEFAULT "osmo-gbproxy.cfg" |
| #define CONFIG_FILE_LEGACY "osmo_gbproxy.cfg" |
| |
| static char *config_file = NULL; |
| struct gbproxy_config *gbcfg; |
| static int daemonize = 0; |
| |
| /* Pointer to the SGSN peer */ |
| extern struct gbprox_peer *gbprox_peer_sgsn; |
| |
| static void signal_handler(int signum) |
| { |
| fprintf(stdout, "signal %u received\n", signum); |
| |
| switch (signum) { |
| case SIGINT: |
| case SIGTERM: |
| 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 run default SIGABRT handler, who will generate coredump |
| * and abort the process. abort() should do this for us after we |
| * return, but program wouldn't exit if an external SIGABRT is |
| * received. |
| */ |
| talloc_report(tall_vty_ctx, stderr); |
| talloc_report_full(tall_sgsn_ctx, stderr); |
| signal(SIGABRT, SIG_DFL); |
| raise(SIGABRT); |
| break; |
| case SIGUSR1: |
| talloc_report(tall_vty_ctx, stderr); |
| talloc_report_full(tall_sgsn_ctx, stderr); |
| break; |
| case SIGUSR2: |
| talloc_report_full(tall_vty_ctx, stderr); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static void print_usage() |
| { |
| printf("Usage: osmo-gbproxy\n"); |
| } |
| |
| static void print_help() |
| { |
| printf(" Some useful help...\n"); |
| printf(" -h --help this text\n"); |
| printf(" -d option --debug=DNS:DGPRS,0:0 enable debugging\n"); |
| printf(" -D --daemonize Fork the process into a background daemon\n"); |
| printf(" -c --config-file filename The config file to use [%s]\n", CONFIG_FILE_DEFAULT); |
| printf(" -s --disable-color\n"); |
| printf(" -T --timestamp Prefix every log line with a timestamp\n"); |
| printf(" -V --version. Print the version.\n"); |
| printf(" -e --log-level number. Set a global loglevel.\n"); |
| |
| printf("\nVTY reference generation:\n"); |
| printf(" --vty-ref-mode MODE VTY reference generation mode (e.g. 'expert').\n"); |
| printf(" --vty-ref-xml Generate the VTY reference XML output and exit.\n"); |
| } |
| |
| static void handle_long_options(const char *prog_name, const int long_option) |
| { |
| static int vty_ref_mode = VTY_REF_GEN_MODE_DEFAULT; |
| |
| switch (long_option) { |
| case 1: |
| vty_ref_mode = get_string_value(vty_ref_gen_mode_names, optarg); |
| if (vty_ref_mode < 0) { |
| fprintf(stderr, "%s: Unknown VTY reference generation " |
| "mode '%s'\n", prog_name, optarg); |
| exit(2); |
| } |
| break; |
| case 2: |
| fprintf(stderr, "Generating the VTY reference in mode '%s' (%s)\n", |
| get_value_string(vty_ref_gen_mode_names, vty_ref_mode), |
| get_value_string(vty_ref_gen_mode_desc, vty_ref_mode)); |
| vty_dump_xml_ref_mode(stdout, (enum vty_ref_gen_mode) vty_ref_mode); |
| exit(0); |
| default: |
| fprintf(stderr, "%s: error parsing cmdline options\n", prog_name); |
| exit(2); |
| } |
| } |
| |
| static void handle_options(int argc, char **argv) |
| { |
| while (1) { |
| int option_index = 0, c; |
| static int long_option = 0; |
| 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' }, |
| { "version", 0, 0, 'V' }, |
| { "log-level", 1, 0, 'e' }, |
| { "vty-ref-mode", 1, &long_option, 1 }, |
| { "vty-ref-xml", 0, &long_option, 2 }, |
| { 0, 0, 0, 0 } |
| }; |
| |
| c = getopt_long(argc, argv, "hd:Dc:sTVe:", |
| long_options, &option_index); |
| if (c == -1) |
| break; |
| |
| switch (c) { |
| case 'h': |
| print_usage(); |
| print_help(); |
| exit(0); |
| case 0: |
| handle_long_options(argv[0], long_option); |
| break; |
| 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': |
| config_file = 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; |
| case 'V': |
| print_version(1); |
| exit(0); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| if (argc > optind) { |
| fprintf(stderr, "Unsupported positional arguments on command line\n"); |
| exit(2); |
| } |
| } |
| |
| static struct vty_app_info vty_info = { |
| .name = "OsmoGbProxy", |
| .version = PACKAGE_VERSION, |
| }; |
| |
| /* default categories */ |
| static struct log_info_cat gprs_categories[] = { |
| [DGPRS] = { |
| .name = "DGPRS", |
| .description = "GPRS Packet Service", |
| .enabled = 1, |
| .loglevel = LOGL_NOTICE, |
| }, |
| [DOBJ] = { |
| .name = "DOBJ", |
| .description = "GbProxy object allocation/release", |
| .enabled = 1, |
| .loglevel = LOGL_NOTICE, |
| .color = "\033[38;5;121m" |
| }, |
| }; |
| |
| static const struct log_info gprs_log_info = { |
| .filter_fn = gprs_log_filter_fn, |
| .cat = gprs_categories, |
| .num_cat = ARRAY_SIZE(gprs_categories), |
| }; |
| |
| static bool file_exists(const char *path) |
| { |
| struct stat sb; |
| return stat(path, &sb) ? false : true; |
| } |
| |
| int gbprox_bssgp_send_cb(void *ctx, struct msgb *msg); |
| |
| int main(int argc, char **argv) |
| { |
| int rc; |
| struct ctrl_handle *ctrl; |
| |
| tall_sgsn_ctx = talloc_named_const(NULL, 0, "gb_proxy"); |
| msgb_talloc_ctx_init(tall_sgsn_ctx, 0); |
| vty_info.tall_ctx = tall_sgsn_ctx; |
| |
| signal(SIGINT, &signal_handler); |
| signal(SIGTERM, &signal_handler); |
| signal(SIGABRT, &signal_handler); |
| signal(SIGUSR1, &signal_handler); |
| signal(SIGUSR2, &signal_handler); |
| osmo_init_ignore_signals(); |
| |
| osmo_init_logging2(tall_sgsn_ctx, &gprs_log_info); |
| |
| vty_info.copyright = openbsc_copyright; |
| vty_init(&vty_info); |
| ctrl_vty_init(tall_sgsn_ctx); |
| logging_vty_add_cmds(); |
| osmo_talloc_vty_add_cmds(); |
| osmo_stats_vty_add_cmds(); |
| osmo_fsm_vty_add_cmds(); |
| osmo_cpu_sched_vty_init(tall_sgsn_ctx); |
| gbproxy_vty_init(); |
| |
| rate_ctr_init(tall_sgsn_ctx); |
| osmo_stats_init(tall_sgsn_ctx); |
| |
| gbcfg = talloc_zero(tall_sgsn_ctx, struct gbproxy_config); |
| if (!gbcfg) { |
| LOGP(DGPRS, LOGL_FATAL, "Unable to allocate config\n"); |
| exit(1); |
| } |
| gbproxy_init_config(gbcfg); |
| gbcfg->nsi = gprs_ns2_instantiate(tall_sgsn_ctx, gprs_ns2_prim_cb, gbcfg); |
| if (!gbcfg->nsi) { |
| LOGP(DGPRS, LOGL_ERROR, "Unable to instantiate NS\n"); |
| exit(1); |
| } |
| gprs_ns2_vty_init(gbcfg->nsi); |
| logging_vty_add_deprecated_subsys(tall_sgsn_ctx, "bssgp"); |
| |
| handle_options(argc, argv); |
| |
| /* Backwards compatibility: for years, the default config file name was |
| * osmo_gbproxy.cfg. All other Osmocom programs use osmo-*.cfg with a |
| * dash. To be able to use the new config file name without breaking |
| * previous setups that might rely on the legacy default config file |
| * name, we need to look for the old config file if no -c option was |
| * passed AND no file exists with the new default file name. */ |
| if (!config_file) { |
| /* No -c option was passed */ |
| if (file_exists(CONFIG_FILE_LEGACY) |
| && !file_exists(CONFIG_FILE_DEFAULT)) |
| config_file = CONFIG_FILE_LEGACY; |
| else |
| config_file = CONFIG_FILE_DEFAULT; |
| } |
| |
| bssgp_set_bssgp_callback(gbprox_bssgp_send_cb, gbcfg); |
| |
| rc = gbproxy_parse_config(config_file, gbcfg); |
| if (rc < 0) { |
| LOGP(DGPRS, LOGL_FATAL, "Cannot parse config file '%s'\n", config_file); |
| exit(2); |
| } |
| |
| /* start telnet after reading config for vty_get_bind_addr() */ |
| rc = telnet_init_dynif(tall_sgsn_ctx, NULL, |
| vty_get_bind_addr(), OSMO_VTY_PORT_GBPROXY); |
| if (rc < 0) |
| exit(1); |
| |
| /* Start control interface after getting config for |
| * ctrl_vty_get_bind_addr() */ |
| ctrl = ctrl_interface_setup_dynip(gbcfg, ctrl_vty_get_bind_addr(), OSMO_CTRL_PORT_GBPROXY, NULL); |
| if (!ctrl) { |
| LOGP(DGPRS, LOGL_FATAL, "Failed to create CTRL interface.\n"); |
| exit(1); |
| } |
| |
| if (gb_ctrl_cmds_install() != 0) { |
| LOGP(DGPRS, LOGL_FATAL, "Failed to install CTRL commands.\n"); |
| exit(1); |
| } |
| |
| 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); |
| } |
| |
| exit(0); |
| } |