| /* 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/core/sockaddr_str.h> |
| |
| #include <osmocom/gprs/gprs_ns2.h> |
| #include <osmocom/gprs/gprs_bssgp.h> |
| #include <osmocom/gprs/gprs_bssgp_bss.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 <osmocom/ctrl/control_vty.h> |
| |
| #include <osmocom/sgsn/signal.h> |
| #include <osmocom/sgsn/debug.h> |
| #include <osmocom/sgsn/vty.h> |
| #include <osmocom/sgsn/sgsn.h> |
| #include <osmocom/sgsn/gprs_llc.h> |
| #include <osmocom/sgsn/gprs_gmm.h> |
| #include <osmocom/sgsn/gprs_ranap.h> |
| #include <osmocom/sgsn/gprs_gb.h> |
| #include <osmocom/sgsn/gprs_bssgp.h> |
| |
| #include <osmocom/ctrl/control_if.h> |
| #include <osmocom/ctrl/ports.h> |
| |
| #include <gtp.h> |
| #include <osmocom/sgsn/sgsn_rim.h> |
| |
| #include "../../bscconfig.h" |
| |
| #if BUILD_IU |
| #include <osmocom/sigtran/osmo_ss7.h> |
| #include <osmocom/sigtran/protocol/m3ua.h> |
| #include <osmocom/ranap/iu_client.h> |
| #endif |
| |
| #define _GNU_SOURCE |
| #include <getopt.h> |
| |
| void *tall_sgsn_ctx; |
| struct ctrl_handle *g_ctrlh; |
| |
| struct gprs_ns2_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"; |
| |
| #define CONFIG_FILE_DEFAULT "osmo-sgsn.cfg" |
| #define CONFIG_FILE_LEGACY "osmo_sgsn.cfg" |
| |
| |
| struct sgsn_instance *sgsn; |
| |
| /* call-back function for the BSSGP protocol. |
| * Must be left here so that we can add a new one in tests/sgsn_test */ |
| int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx) |
| { |
| return sgsn_bssgp_rx_prim(oph); |
| } |
| |
| 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 int sgsn_vty_go_parent(struct vty *vty) |
| { |
| switch (vty->node) { |
| case SGSN_NODE: |
| vty->node = CONFIG_NODE; |
| break; |
| case MME_NODE: |
| vty->node = SGSN_NODE; |
| vty->index = NULL; |
| break; |
| default: |
| #if BUILD_IU |
| osmo_ss7_vty_go_parent(vty); |
| #else |
| vty->node = CONFIG_NODE; |
| vty->index = NULL; |
| #endif |
| break; |
| } |
| |
| return vty->node; |
| } |
| |
| /* NSI that BSSGP uses when transmitting on NS */ |
| extern struct gprs_ns_inst *bssgp_nsi; |
| |
| static struct vty_app_info vty_info = { |
| .name = "OsmoSGSN", |
| .version = PACKAGE_VERSION, |
| .go_parent_cb = sgsn_vty_go_parent, |
| }; |
| |
| static void print_help(void) |
| { |
| printf("Some useful help...\n"); |
| printf(" -h --help\tthis text\n"); |
| printf(" -V --version\tPrint the version\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", CONFIG_FILE_DEFAULT); |
| printf(" -e --log-level number\tSet a global log level\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}, |
| {NULL, 0, 0, 0} |
| }; |
| |
| c = getopt_long(argc, argv, "hd:Dc:sTVe:", |
| long_options, &option_index); |
| if (c == -1) |
| break; |
| |
| switch (c) { |
| case 0: |
| handle_long_options(argv[0], long_option); |
| break; |
| 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': |
| osmo_talloc_replace_string(sgsn, &sgsn->config_file, optarg); |
| break; |
| case 'T': |
| log_set_print_timestamp(osmo_stderr_target, 1); |
| break; |
| case 'V': |
| print_version(1); |
| exit(0); |
| break; |
| case 'e': |
| log_set_log_level(osmo_stderr_target, atoi(optarg)); |
| break; |
| default: |
| /* ignore */ |
| break; |
| } |
| } |
| |
| if (argc > optind) { |
| fprintf(stderr, "Unsupported positional arguments on command line\n"); |
| exit(2); |
| } |
| } |
| |
| /* 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_NOTICE, |
| }, |
| [DLLC] = { |
| .name = "DLLC", |
| .description = "GPRS Logical Link Control Protocol (LLC)", |
| .enabled = 1, .loglevel = LOGL_NOTICE, |
| }, |
| [DSNDCP] = { |
| .name = "DSNDCP", |
| .description = "GPRS Sub-Network Dependent Control Protocol (SNDCP)", |
| .enabled = 1, .loglevel = LOGL_NOTICE, |
| }, |
| [DRANAP] = { |
| .name = "DRANAP", |
| .description = "RAN Application Part (RANAP)", |
| .enabled = 1, .loglevel = LOGL_NOTICE, |
| }, |
| [DSUA] = { |
| .name = "DSUA", |
| .description = "SCCP User Adaptation (SUA)", |
| .enabled = 1, .loglevel = LOGL_NOTICE, |
| }, |
| [DSLHC] = { |
| .name = "DSLHC", |
| .description = "RFC1144 TCP/IP Header compression (SLHC)", |
| .enabled = 1, .loglevel = LOGL_NOTICE, |
| }, |
| [DV42BIS] = { |
| .name = "DV42BIS", |
| .description = "V.42bis data compression (SNDCP)", |
| .enabled = 1, .loglevel = LOGL_NOTICE, |
| }, |
| [DGTP] = { |
| .name = "DGTP", |
| .description = "GPRS Tunnelling Protocol (GTP)", |
| .enabled = 1, .loglevel = LOGL_NOTICE, |
| }, |
| [DRIM] = { |
| .name = "DRIM", |
| .description = "RAN Information Management (RIM)", |
| .enabled = 1, .loglevel = LOGL_NOTICE, |
| }, |
| }; |
| |
| 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 main(int argc, char **argv) |
| { |
| int rc; |
| #if BUILD_IU |
| struct osmo_sccp_instance *sccp; |
| #endif |
| |
| srand(time(NULL)); |
| tall_sgsn_ctx = talloc_named_const(NULL, 0, "osmo_sgsn"); |
| sgsn = sgsn_instance_alloc(tall_sgsn_ctx); |
| 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); |
| osmo_stats_init(tall_sgsn_ctx); |
| |
| vty_info.copyright = openbsc_copyright; |
| vty_init(&vty_info); |
| logging_vty_add_cmds(); |
| osmo_talloc_vty_add_cmds(); |
| osmo_stats_vty_add_cmds(); |
| sgsn_vty_init(&sgsn->cfg); |
| ctrl_vty_init(tall_sgsn_ctx); |
| osmo_cpu_sched_vty_init(tall_sgsn_ctx); |
| |
| #if BUILD_IU |
| OSMO_ASSERT(osmo_ss7_init() == 0); |
| osmo_ss7_vty_init_asp(tall_sgsn_ctx); |
| osmo_sccp_vty_init(); |
| #endif |
| |
| rate_ctr_init(tall_sgsn_ctx); |
| |
| logging_vty_add_deprecated_subsys(tall_sgsn_ctx, "bssgp"); |
| logging_vty_add_deprecated_subsys(tall_sgsn_ctx, "ns"); |
| |
| sgsn_nsi = gprs_ns2_instantiate(tall_sgsn_ctx, &gprs_ns_prim_cb, NULL); |
| if (!sgsn_nsi) { |
| LOGP(DGPRS, LOGL_ERROR, "Unable to instantiate NS\n"); |
| exit(1); |
| } |
| sgsn->cfg.nsi = sgsn_nsi; |
| bssgp_set_bssgp_callback(sgsn_bssgp_dispatch_ns_unitdata_req_cb, sgsn_nsi); |
| |
| gprs_llc_init("/usr/local/lib/osmocom/crypt/"); |
| sgsn_rate_ctr_init(); |
| sgsn_inst_init(sgsn); |
| |
| |
| gprs_ns2_vty_init(sgsn_nsi); |
| bssgp_vty_init(); |
| gprs_llc_vty_init(); |
| gprs_sndcp_vty_init(); |
| sgsn_auth_init(sgsn); |
| sgsn_cdr_init(sgsn); |
| |
| handle_options(argc, argv); |
| |
| /* Backwards compatibility: for years, the default config file name was |
| * osmo_sgsn.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 (!sgsn->config_file) { |
| /* No -c option was passed */ |
| if (file_exists(CONFIG_FILE_LEGACY) |
| && !file_exists(CONFIG_FILE_DEFAULT)) |
| osmo_talloc_replace_string(sgsn, &sgsn->config_file, CONFIG_FILE_LEGACY); |
| else |
| osmo_talloc_replace_string(sgsn, &sgsn->config_file, CONFIG_FILE_DEFAULT); |
| } |
| |
| rc = sgsn_parse_config(sgsn->config_file); |
| if (rc < 0) { |
| LOGP(DGPRS, LOGL_FATAL, "Error in config file\n"); |
| 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_SGSN); |
| if (rc < 0) |
| exit(1); |
| |
| /* start control interface after reading config for |
| * ctrl_vty_get_bind_addr() */ |
| g_ctrlh = ctrl_interface_setup(NULL, OSMO_CTRL_PORT_SGSN, NULL); |
| if (!g_ctrlh) { |
| 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); |
| if (rc) { |
| LOGP(DGPRS, LOGL_FATAL, "Cannot bind/listen on GTP socket\n"); |
| exit(2); |
| } else |
| LOGP(DGPRS, LOGL_NOTICE, "libGTP v%s initialized\n", gtp_version()); |
| |
| rc = gprs_subscr_init(sgsn); |
| if (rc < 0) { |
| LOGP(DGPRS, LOGL_FATAL, "Cannot set up subscriber management\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 BUILD_IU |
| /* Note that these are mostly defaults and can be overriden from the VTY */ |
| sccp = osmo_sccp_simple_client_on_ss7_id(tall_sgsn_ctx, |
| sgsn->cfg.iu.cs7_instance, |
| "OsmoSGSN", |
| (23 << 3) + 4, |
| OSMO_SS7_ASP_PROT_M3UA, |
| 0, "localhost", |
| 0, "localhost"); |
| if (!sccp) { |
| printf("Setting up SCCP client failed.\n"); |
| return 8; |
| } |
| |
| ranap_iu_init(tall_sgsn_ctx, DRANAP, "OsmoSGSN-IuPS", sccp, gsm0408_gprs_rcvmsg_iu, sgsn_ranap_iu_event); |
| #endif |
| |
| 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); |
| } |