| /* 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/gprs/gprs_ns.h> |
| #include <osmocom/gprs/gprs_bssgp.h> |
| |
| #include <openbsc/signal.h> |
| #include <openbsc/debug.h> |
| #include <openbsc/vty.h> |
| #include <openbsc/gb_proxy.h> |
| |
| #include <osmocom/vty/command.h> |
| #include <osmocom/vty/telnet_interface.h> |
| #include <osmocom/vty/logging.h> |
| |
| #include "../../bscconfig.h" |
| |
| /* this is here for the vty... it will never be called */ |
| void subscr_put() { abort(); } |
| |
| #define _GNU_SOURCE |
| #include <getopt.h> |
| |
| void *tall_bsc_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"; |
| |
| static char *config_file = "osmo_gbproxy.cfg"; |
| struct gbproxy_config gbcfg = {0}; |
| static int daemonize = 0; |
| |
| /* Pointer to the SGSN peer */ |
| extern struct gbprox_peer *gbprox_peer_sgsn; |
| |
| /* call-back function for the NS protocol */ |
| static int proxy_ns_cb(enum gprs_ns_evt event, struct gprs_nsvc *nsvc, |
| struct msgb *msg, uint16_t bvci) |
| { |
| int rc = 0; |
| |
| switch (event) { |
| case GPRS_NS_EVT_UNIT_DATA: |
| rc = gbprox_rcvmsg(&gbcfg, msg, nsvc->nsei, bvci, nsvc->nsvci); |
| break; |
| default: |
| LOGP(DGPRS, LOGL_ERROR, "SGSN: Unknown event %u from NS\n", event); |
| if (msg) |
| msgb_free(msg); |
| rc = -EIO; |
| break; |
| } |
| return rc; |
| } |
| |
| static void signal_handler(int signal) |
| { |
| fprintf(stdout, "signal %u received\n", signal); |
| |
| switch (signal) { |
| case SIGINT: |
| 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 return to the caller, who will abort the process */ |
| case SIGUSR1: |
| talloc_report(tall_vty_ctx, stderr); |
| talloc_report_full(tall_bsc_ctx, stderr); |
| break; |
| case SIGUSR2: |
| talloc_report_full(tall_vty_ctx, stderr); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static void print_usage() |
| { |
| printf("Usage: bsc_hack\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.\n"); |
| printf(" -s --disable-color\n"); |
| printf(" -T --timestamp Prefix every log line with a timestamp\n"); |
| printf(" -V --version. Print the version of OpenBSC.\n"); |
| printf(" -e --log-level number. Set a global loglevel.\n"); |
| } |
| |
| static void handle_options(int argc, char **argv) |
| { |
| while (1) { |
| int option_index = 0, c; |
| 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' }, |
| { 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 '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 = strdup(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; |
| } |
| } |
| } |
| |
| extern void *tall_msgb_ctx; |
| |
| extern enum node_type bsc_vty_go_parent(struct vty *vty); |
| |
| static struct vty_app_info vty_info = { |
| .name = "OsmoGbProxy", |
| .version = PACKAGE_VERSION, |
| .go_parent_cb = bsc_vty_go_parent, |
| .is_config_node = bsc_vty_is_config_node, |
| }; |
| |
| /* default categories */ |
| static struct log_info_cat gprs_categories[] = { |
| [DGPRS] = { |
| .name = "DGPRS", |
| .description = "GPRS Packet Service", |
| .enabled = 1, .loglevel = LOGL_DEBUG, |
| }, |
| [DNS] = { |
| .name = "DNS", |
| .description = "GPRS Network Service (NS)", |
| .enabled = 1, .loglevel = LOGL_INFO, |
| }, |
| [DBSSGP] = { |
| .name = "DBSSGP", |
| .description = "GPRS BSS Gateway Protocol (BSSGP)", |
| .enabled = 1, .loglevel = LOGL_DEBUG, |
| }, |
| }; |
| |
| static const struct log_info gprs_log_info = { |
| .filter_fn = gprs_log_filter_fn, |
| .cat = gprs_categories, |
| .num_cat = ARRAY_SIZE(gprs_categories), |
| }; |
| |
| int main(int argc, char **argv) |
| { |
| struct gsm_network dummy_network; |
| int rc; |
| |
| tall_bsc_ctx = talloc_named_const(NULL, 0, "nsip_proxy"); |
| tall_msgb_ctx = talloc_named_const(tall_bsc_ctx, 0, "msgb"); |
| |
| signal(SIGINT, &signal_handler); |
| signal(SIGABRT, &signal_handler); |
| signal(SIGUSR1, &signal_handler); |
| signal(SIGUSR2, &signal_handler); |
| osmo_init_ignore_signals(); |
| |
| osmo_init_logging(&gprs_log_info); |
| |
| vty_info.copyright = openbsc_copyright; |
| vty_init(&vty_info); |
| logging_vty_add_cmds(&gprs_log_info); |
| gbproxy_vty_init(); |
| |
| handle_options(argc, argv); |
| |
| rate_ctr_init(tall_bsc_ctx); |
| |
| rc = telnet_init(tall_bsc_ctx, &dummy_network, 4246); |
| if (rc < 0) |
| exit(1); |
| |
| bssgp_nsi = gprs_ns_instantiate(&proxy_ns_cb, tall_bsc_ctx); |
| if (!bssgp_nsi) { |
| LOGP(DGPRS, LOGL_ERROR, "Unable to instantiate NS\n"); |
| exit(1); |
| } |
| gbproxy_init_config(&gbcfg); |
| gbcfg.nsi = bssgp_nsi; |
| gprs_ns_vty_init(bssgp_nsi); |
| gprs_ns_set_log_ss(DNS); |
| bssgp_set_log_ss(DBSSGP); |
| osmo_signal_register_handler(SS_L_NS, &gbprox_signal, &gbcfg); |
| |
| rc = gbproxy_parse_config(config_file, &gbcfg); |
| if (rc < 0) { |
| LOGP(DGPRS, LOGL_FATAL, "Cannot parse config file\n"); |
| exit(2); |
| } |
| |
| if (!gprs_nsvc_by_nsei(gbcfg.nsi, gbcfg.nsip_sgsn_nsei)) { |
| LOGP(DGPRS, LOGL_FATAL, "You cannot proxy to NSEI %u " |
| "without creating that NSEI before\n", |
| gbcfg.nsip_sgsn_nsei); |
| exit(2); |
| } |
| |
| rc = gprs_ns_nsip_listen(bssgp_nsi); |
| if (rc < 0) { |
| LOGP(DGPRS, LOGL_FATAL, "Cannot bind/listen on NSIP socket\n"); |
| exit(2); |
| } |
| |
| rc = gprs_ns_frgre_listen(bssgp_nsi); |
| if (rc < 0) { |
| LOGP(DGPRS, LOGL_FATAL, "Cannot bind/listen GRE " |
| "socket. Do you have CAP_NET_RAW?\n"); |
| exit(2); |
| } |
| |
| if (daemonize) { |
| rc = osmo_daemonize(); |
| if (rc < 0) { |
| perror("Error during daemonize"); |
| exit(1); |
| } |
| } |
| |
| /* Reset all the persistent NS-VCs that we've read from the config */ |
| gbprox_reset_persistent_nsvcs(bssgp_nsi); |
| |
| while (1) { |
| rc = osmo_select_main(0); |
| if (rc < 0) |
| exit(3); |
| } |
| |
| exit(0); |
| } |