diff options
Diffstat (limited to 'openbsc/src/osmo-cscn/cscn_main.c')
-rw-r--r-- | openbsc/src/osmo-cscn/cscn_main.c | 511 |
1 files changed, 511 insertions, 0 deletions
diff --git a/openbsc/src/osmo-cscn/cscn_main.c b/openbsc/src/osmo-cscn/cscn_main.c new file mode 100644 index 000000000..eea029de7 --- /dev/null +++ b/openbsc/src/osmo-cscn/cscn_main.c @@ -0,0 +1,511 @@ +/* OsmoCSCN - Circuit-Switched Core Network (MSC+VLR+HLR+SMSC) implementation + */ + +/* (C) 2016 by sysmocom s.f.m.c. GmbH <info@sysmocom.de> + * All Rights Reserved + * + * Based on OsmoNITB: + * (C) 2008-2010 by Harald Welte <laforge@gnumonks.org> + * (C) 2009-2012 by Holger Hans Peter Freyther <zecke@selfish.org> + * 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 <time.h> +#include <errno.h> +#include <signal.h> +#include <fcntl.h> +#include <sys/stat.h> + +#define _GNU_SOURCE +#include <getopt.h> + +/* build switches from the configure script */ +#include "../../bscconfig.h" + +#include <openbsc/db.h> +#include <osmocom/core/application.h> +#include <osmocom/core/select.h> +#include <osmocom/core/stats.h> +#include <openbsc/debug.h> +#include <osmocom/abis/abis.h> +#include <osmocom/abis/e1_input.h> +#include <osmocom/core/talloc.h> +#include <openbsc/signal.h> +#include <openbsc/osmo_msc.h> +#include <openbsc/osmo_msc_data.h> +#include <openbsc/sms_queue.h> +#include <osmocom/vty/telnet_interface.h> +#include <osmocom/vty/ports.h> +#include <osmocom/vty/logging.h> +#include <openbsc/vty.h> +#include <openbsc/bss.h> +#include <openbsc/mncc.h> +#include <openbsc/token_auth.h> +#include <openbsc/handover_decision.h> +#include <openbsc/rrlp.h> +#include <osmocom/ctrl/control_if.h> +#include <osmocom/ctrl/control_vty.h> +#include <osmocom/ctrl/ports.h> +#include <openbsc/ctrl.h> +#include <openbsc/osmo_bsc_rf.h> +#include <openbsc/smpp.h> +#include <osmocom/sigtran/sccp_sap.h> +#include <osmocom/sigtran/sua.h> + +#include <openbsc/msc_ifaces.h> +#include <openbsc/iu.h> +#include <openbsc/iu_cs.h> + +#include "iucs_ranap.h" + +static const char * const osmocscn_copyright = + "OsmoCSCN - Osmocom Circuit-Switched Core Network implementation\r\n" + "Copyright (C) 2016 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>\r\n" + "Based on OsmoNITB:\r\n" + " (C) 2008-2010 by Harald Welte <laforge@gnumonks.org>\r\n" + " (C) 2009-2012 by Holger Hans Peter Freyther <zecke@selfish.org>\r\n" + "Contributions by Daniel Willmann, Jan Lübbe, Stefan Schmidt\r\n" + "Dieter Spaar, Andreas Eversberg, Sylvain Munaut, Neels Hofmeyr\r\n\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"; + +void *tall_cscn_ctx = NULL; + +/* satisfy deps from libbsc legacy. + TODO double check these */ +void *tall_fle_ctx = NULL; +void *tall_paging_ctx = NULL; +void *tall_map_ctx = NULL; +void *tall_upq_ctx = NULL; +/* end deps from libbsc legacy. */ + +static struct { + const char *database_name; + const char *config_file; + int daemonize; + const char *mncc_sock_path; + int use_db_counter; +} cscn_cmdline_config = { + "hlr.sqlite3", + "osmo-cscn.cfg", + 0, + 0, + 1 +}; + +/* timer to store statistics */ +#define DB_SYNC_INTERVAL 60, 0 +#define EXPIRE_INTERVAL 10, 0 + +static struct osmo_timer_list db_sync_timer; + +static void create_pcap_file(char *file) +{ + mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH; + int fd = open(file, O_WRONLY|O_TRUNC|O_CREAT, mode); + + if (fd < 0) { + perror("Failed to open file for pcap"); + return; + } + + e1_set_pcap_fd(fd); +} + +static void print_usage() +{ + printf("Usage: osmo-nitb\n"); +} + +static void print_help() +{ + printf(" Some useful help...\n"); + printf(" -h --help This text.\n"); + printf(" -d option --debug=DRLL:DCC:DMM:DRR:DRSL:DNM 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(" -l --database db-name The database to use.\n"); + printf(" -a --authorize-everyone Authorize every new subscriber. Dangerous!\n"); + printf(" -T --timestamp Prefix every log line with a timestamp.\n"); + printf(" -V --version Print the version of OpenBSC.\n"); + printf(" -P --rtp-proxy Enable the RTP Proxy code inside OpenBSC.\n"); + printf(" -e --log-level number Set a global loglevel.\n"); + printf(" -m --mncc-sock Disable built-in MNCC handler and offer socket.\n"); + printf(" -C --no-dbcounter Disable regular syncing of counters to database.\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'}, + {"database", 1, 0, 'l'}, + {"authorize-everyone", 0, 0, 'a'}, + {"pcap", 1, 0, 'p'}, + {"timestamp", 0, 0, 'T'}, + {"version", 0, 0, 'V' }, + {"rtp-proxy", 0, 0, 'P'}, + {"log-level", 1, 0, 'e'}, + {"mncc-sock", 0, 0, 'm'}, + {"mncc-sock-path", 1, 0, 'M'}, + {"no-dbcounter", 0, 0, 'C'}, + {0, 0, 0, 0} + }; + + c = getopt_long(argc, argv, "hd:Dsl:ar:p:TPVc:e:mCr:M:", + 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': + cscn_cmdline_config.daemonize = 1; + break; + case 'l': + cscn_cmdline_config.database_name = optarg; + break; + case 'c': + cscn_cmdline_config.config_file = optarg; + break; + case 'p': + create_pcap_file(optarg); + break; + case 'T': + log_set_print_timestamp(osmo_stderr_target, 1); + break; +#if BEFORE_MSCSPLIT + case 'P': + ipacc_rtp_direct = 0; + break; +#endif + case 'e': + log_set_log_level(osmo_stderr_target, atoi(optarg)); + break; + case 'M': + cscn_cmdline_config.mncc_sock_path = optarg; + break; + case 'm': + cscn_cmdline_config.mncc_sock_path = "/tmp/bsc_mncc"; + break; + case 'C': + cscn_cmdline_config.use_db_counter = 0; + break; + case 'V': + print_version(1); + exit(0); + break; + default: + /* ignore */ + break; + } + } +} + +struct gsm_network *cscn_network_init(void *ctx, + mncc_recv_cb_t mncc_recv) +{ + struct gsm_network *net = gsm_network_init(ctx, 1, 1, mncc_recv); + if (!net) + return NULL; + + net->name_long = talloc_strdup(net, "OsmoCSCN"); + net->name_short = talloc_strdup(net, "OsmoCSCN"); + + return net; +} + +void cscn_network_shutdown(struct gsm_network *net) +{ + /* nothing here yet */ +} + +static struct gsm_network *cscn_network = NULL; + +/* TODO this is here to satisfy linking during intermediate development. Once + * libbsc is not linked to osmo-cscn, this should go away. */ +struct gsm_network *bsc_gsmnet = NULL; + +extern void *tall_vty_ctx; +static void signal_handler(int signal) +{ + fprintf(stdout, "signal %u received\n", signal); + + switch (signal) { + case SIGINT: + cscn_network_shutdown(cscn_network); + osmo_signal_dispatch(SS_L_GLOBAL, S_L_GLOBAL_SHUTDOWN, NULL); + sleep(3); + 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_cscn_ctx, stderr); + break; + case SIGUSR2: + talloc_report_full(tall_vty_ctx, stderr); + break; + default: + break; + } +} + +/* timer handling */ +static int _db_store_counter(struct osmo_counter *counter, void *data) +{ + return db_store_counter(counter); +} + +static void db_sync_timer_cb(void *data) +{ + /* store counters to database and re-schedule */ + osmo_counters_for_each(_db_store_counter, NULL); + osmo_timer_schedule(&db_sync_timer, DB_SYNC_INTERVAL); +} + +static void subscr_expire_cb(void *data) +{ + subscr_expire(cscn_network->subscr_group); + osmo_timer_schedule(&cscn_network->subscr_expire_timer, EXPIRE_INTERVAL); +} + +void talloc_ctx_init(void *ctx_root); + +extern int bsc_vty_go_parent(struct vty *vty); + +static struct vty_app_info cscn_vty_info = { + .name = "OsmoCSCN", + .version = PACKAGE_VERSION, + .go_parent_cb = bsc_vty_go_parent, + .is_config_node = bsc_vty_is_config_node, +}; + +static int rcvmsg_iu_cs(struct msgb *msg, struct gprs_ra_id *ra_id, /* FIXME gprs_ in CS code */ + uint16_t *sai) +{ + DEBUGP(DIUCS, "got IuCS message" + " %d bytes: %s\n", + msg->len, osmo_hexdump(msg->data, msg->len)); + if (ra_id) { + DEBUGP(DIUCS, "got IuCS message on" + " MNC %d MCC %d LAC %d RAC %d\n", + ra_id->mnc, ra_id->mcc, ra_id->lac, ra_id->rac); + } + + return gsm0408_rcvmsg_iucs(cscn_network, msg, ra_id? &ra_id->lac : NULL); +} + +static int rx_iu_event(struct ue_conn_ctx *ctx, enum iu_event_type type, + void *data) +{ + DEBUGP(DIUCS, "got IuCS event %u: %s\n", type, + iu_event_type_str(type)); + + return iucs_rx_ranap_event(cscn_network, ctx, type, data); +} + +int main(int argc, char **argv) +{ + int rc; + + cscn_vty_info.copyright = osmocscn_copyright; + + tall_cscn_ctx = talloc_named_const(NULL, 1, "osmo_cscn"); + talloc_ctx_init(tall_cscn_ctx); + + osmo_init_logging(&log_info); + osmo_stats_init(tall_cscn_ctx); + + handle_options(argc, argv); + + cscn_network = cscn_network_init(tall_cscn_ctx, + cscn_cmdline_config.mncc_sock_path? + mncc_sock_from_cc + : int_mncc_recv); + if (!cscn_network) + return -ENOMEM; + + vty_init(&cscn_vty_info); + ctrl_vty_init(tall_cscn_ctx); + logging_vty_add_cmds(&log_info); + xsc_vty_init(cscn_network); + cscn_vty_init(); + bsc_vty_init_extra(); + +#ifdef BUILD_SMPP + if (smpp_openbsc_alloc_init(tall_cscn_ctx) < 0) + return -1; +#endif + + rc = vty_read_config_file(cscn_cmdline_config.config_file, NULL); + if (rc < 0) { + LOGP(DNM, LOGL_FATAL, "Failed to parse the config file: '%s'\n", + cscn_cmdline_config.config_file); + return 1; + } + + if (cscn_cmdline_config.mncc_sock_path) { + rc = mncc_sock_init(cscn_network, + cscn_cmdline_config.mncc_sock_path); + if (rc < 0) + exit(1); + } else { + DEBUGP(DMNCC, "Using internal MNCC handler.\n"); + } + + /* start telnet after reading config for vty_get_bind_addr() */ + LOGP(DGPRS, LOGL_NOTICE, "VTY at %s %d\n", + vty_get_bind_addr(), OSMO_VTY_PORT_CSCN); + rc = telnet_init_dynif(tall_cscn_ctx, &cscn_network, + vty_get_bind_addr(), OSMO_VTY_PORT_CSCN); + if (rc < 0) + return 2; + + /* BSC stuff is to be split behind an A-interface to be used with + * OsmoBSC, but there is no need to remove it yet. Most of the + * following code until iu_init() is legacy. */ + +#if 0 + on_dso_load_token(); + on_dso_load_rrlp(); + on_dso_load_ho_dec(); + libosmo_abis_init(tall_cscn_ctx); + + bts_init(); +#endif + +#ifdef BUILD_SMPP + smpp_openbsc_start(cscn_network); +#endif + +#if 0 + bsc_api_init(cscn_network, msc_bsc_api()); // pobably not. +#endif + +#if 0 + the bsc_ctrl_node_lookup() only returns BSC specific ctrl nodes + + /* start control interface after reading config for + * ctrl_vty_get_bind_addr() */ + LOGP(DNM, LOGL_NOTICE, "CTRL at %s %d\n", + ctrl_vty_get_bind_addr(), OSMO_CTRL_PORT_CSCN); + cscn_network->ctrl = bsc_controlif_setup(cscn_network, + ctrl_vty_get_bind_addr(), + OSMO_CTRL_PORT_CSCN); + if (!cscn_network->ctrl) { + printf("Failed to initialize control interface. Exiting.\n"); + return -1; + } +#endif + +#if 0 +TODO: we probably want some of the _net_ ctrl commands from bsc_base_ctrl_cmds_install(). + if (bsc_base_ctrl_cmds_install() != 0) { + printf("Failed to initialize the BSC control commands.\n"); + return -1; + } +#endif + +#if 0 + if (msc_ctrl_cmds_install() != 0) { + printf("Failed to initialize the MSC control commands.\n"); + return -1; + } +#endif + + /* seed the PRNG */ + srand(time(NULL)); + /* TODO: is this used for crypto?? Improve randomness, at least we + * should try to use the nanoseconds part of the current time. */ + +#if 0 + cscn_network->bsc_data->rf_ctrl = osmo_bsc_rf_create(rf_ctrl_name, cscn_network); + if (!cscn_network->bsc_data->rf_ctrl) { + fprintf(stderr, "Failed to create the RF service.\n"); + return 3; + } +#endif + + if (db_init(cscn_cmdline_config.database_name)) { + printf("DB: Failed to init database: %s\n", + cscn_cmdline_config.database_name); + return 4; + } + + if (db_prepare()) { + printf("DB: Failed to prepare database.\n"); + return 5; + } + + db_sync_timer.cb = db_sync_timer_cb; + db_sync_timer.data = NULL; + if (cscn_cmdline_config.use_db_counter) + osmo_timer_schedule(&db_sync_timer, DB_SYNC_INTERVAL); + + cscn_network->subscr_expire_timer.cb = subscr_expire_cb; + cscn_network->subscr_expire_timer.data = NULL; + osmo_timer_schedule(&cscn_network->subscr_expire_timer, EXPIRE_INTERVAL); + + signal(SIGINT, &signal_handler); + signal(SIGABRT, &signal_handler); + signal(SIGUSR1, &signal_handler); + signal(SIGUSR2, &signal_handler); + osmo_init_ignore_signals(); + + /* start the SMS queue */ + if (sms_queue_start(cscn_network, 20) != 0) + return -1; + + /* Set up A-Interface */ + /* TODO: implement A-Interface and remove above legacy stuff. */ + + /* Set up IuCS */ + iu_init(tall_cscn_ctx, "127.0.0.1", 14001, rcvmsg_iu_cs, rx_iu_event); + + if (cscn_cmdline_config.daemonize) { + rc = osmo_daemonize(); + if (rc < 0) { + perror("Error during daemonize"); + return 6; + } + } + + while (1) { + log_reset_context(); + osmo_select_main(0); + } +} |