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Diffstat (limited to 'src/main_udt.c')
-rw-r--r-- | src/main_udt.c | 363 |
1 files changed, 363 insertions, 0 deletions
diff --git a/src/main_udt.c b/src/main_udt.c new file mode 100644 index 0000000..0b07da7 --- /dev/null +++ b/src/main_udt.c @@ -0,0 +1,363 @@ +/* Relay UDT/all SCCP messages */ +/* + * (C) 2010 by Holger Hans Peter Freyther <zecke@selfish.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 General Public License as published by + * the Free Software Foundation; either version 2 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * + */ + +#include <mtp_data.h> +#include <mtp_pcap.h> +#include <thread.h> +#include <bsc_data.h> +#include <snmp_mtp.h> +#include <cellmgr_debug.h> + +#include <osmocore/talloc.h> + +#include <osmocom/vty/vty.h> +#include <osmocom/vty/telnet_interface.h> + +#include <sys/stat.h> +#include <sys/types.h> + +#include <fcntl.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <assert.h> +#include <unistd.h> + +#ifndef _GNU_SOURCE +#define _GNU_SOURCE +#endif +#include <getopt.h> + +#undef PACKAGE_NAME +#undef PACKAGE_VERSION +#undef PACKAGE_BUGREPORT +#undef PACKAGE_TARNAME +#undef PACKAGE_STRING +#include <cellmgr_config.h> + +static struct log_target *stderr_target; + +static char *config = "udt_relay.cfg"; + +struct bsc_data bsc; +extern void cell_vty_init(void); + +int link_c7_init(struct link_data *data) __attribute__((__weak__)); + +int link_c7_init(struct link_data *data) +{ + return -1; +} + +/* + * methods called from the MTP Level3 part + */ +void mtp_link_submit(struct mtp_link *link, struct msgb *msg) +{ + bsc.link.write(&bsc.link, msg); +} + +void mtp_link_restart(struct mtp_link *link) +{ + LOGP(DINP, LOGL_ERROR, "Need to restart the SS7 link.\n"); + bsc.link.reset(&bsc.link); +} + +void mtp_link_sccp_down(struct mtp_link *link) +{ + msc_clear_queue(&bsc); +} + +void mtp_link_forward_sccp(struct mtp_link *link, struct msgb *_msg, int sls) +{ + msc_send_direct(&bsc, _msg); +} + +void bsc_link_down(struct link_data *data) +{ + int was_up; + struct mtp_link *link = data->the_link; + + link->available = 0; + was_up = link->sccp_up; + mtp_link_stop(link); + + data->clear_queue(data); + + /* clear pending messages from the MSC */ + msc_clear_queue(data->bsc); + + /* If we have an A link send a reset to the MSC */ + msc_send_reset(data->bsc); +} + +void bsc_link_up(struct link_data *data) +{ + data->the_link->available = 1; + mtp_link_reset(data->the_link); +} + +static void print_usage() +{ + printf("Usage: cellmgr_ng\n"); +} + +static void sigint() +{ + static pthread_mutex_t exit_mutex = PTHREAD_MUTEX_INITIALIZER; + static int handled = 0; + + /* failed to lock */ + if (pthread_mutex_trylock(&exit_mutex) != 0) + return; + if (handled) + goto out; + + printf("Terminating.\n"); + handled = 1; + if (bsc.setup) + bsc.link.shutdown(&bsc.link); + exit(0); + +out: + pthread_mutex_unlock(&exit_mutex); +} + +static void sigusr2() +{ + printf("Closing the MSC connection on demand.\n"); + msc_close_connection(&bsc); +} + +static void print_help() +{ + printf(" Some useful help...\n"); + printf(" -h --help this text\n"); + printf(" -c --config=CFG The config file to use.\n"); + printf(" -p --pcap=FILE. Write MSUs to the PCAP file.\n"); + printf(" -c --once. Send the SLTM msg only once.\n"); + printf(" -v --version. Print the version number\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'}, + {"config", 1, 0, 'c'}, + {"pcap", 1, 0, 'p'}, + {"version", 0, 0, 0}, + {0, 0, 0, 0}, + }; + + c = getopt_long(argc, argv, "hc:p:v", + long_options, &option_index); + if (c == -1) + break; + + switch (c) { + case 'h': + print_usage(); + print_help(); + exit(0); + case 'p': + if (bsc.link.pcap_fd >= 0) + close(bsc.link.pcap_fd); + bsc.link.pcap_fd = open(optarg, O_WRONLY | O_TRUNC | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP| S_IROTH); + if (bsc.link.pcap_fd < 0) { + fprintf(stderr, "Failed to open PCAP file.\n"); + exit(0); + } + mtp_pcap_write_header(bsc.link.pcap_fd); + break; + case 'c': + config = optarg; + break; + case 'v': + printf("This is %s version %s.\n", PACKAGE, VERSION); + exit(0); + break; + default: + fprintf(stderr, "Unknown option.\n"); + break; + } + } +} + +static void start_rest(void *start) +{ + bsc.setup = 1; + + if (msc_init(&bsc, 0) != 0) { + fprintf(stderr, "Failed to init MSC part.\n"); + exit(3); + } + + bsc.link.start(&bsc.link); +} + + +int main(int argc, char **argv) +{ + int rc; + INIT_LLIST_HEAD(&bsc.sccp_connections); + + bsc.dpc = 1; + bsc.opc = 0; + bsc.udp_port = 3456; + bsc.udp_ip = NULL; + bsc.src_port = 1313; + + mtp_link_init(); + thread_init(); + + log_init(&log_info); + stderr_target = log_target_create_stderr(); + log_add_target(stderr_target); + + /* enable filters */ + log_set_all_filter(stderr_target, 1); + log_set_category_filter(stderr_target, DINP, 1, LOGL_INFO); + log_set_category_filter(stderr_target, DSCCP, 1, LOGL_INFO); + log_set_category_filter(stderr_target, DMSC, 1, LOGL_INFO); + log_set_category_filter(stderr_target, DMGCP, 1, LOGL_INFO); + log_set_print_timestamp(stderr_target, 1); + log_set_use_color(stderr_target, 0); + + sccp_set_log_area(DSCCP); + + bsc.setup = 0; + bsc.msc_address = "127.0.0.1"; + bsc.link.pcap_fd = -1; + bsc.link.udp.reset_timeout = 180; + bsc.ping_time = 20; + bsc.pong_time = 5; + bsc.msc_time = 20; + + handle_options(argc, argv); + + signal(SIGPIPE, SIG_IGN); + signal(SIGINT, sigint); + signal(SIGUSR2, sigusr2); + srand(time(NULL)); + + cell_vty_init(); + if (vty_read_config_file(config, NULL) < 0) { + fprintf(stderr, "Failed to read the VTY config.\n"); + return -1; + } + + rc = telnet_init(NULL, NULL, 4242); + if (rc < 0) + return rc; + + bsc.link.the_link = mtp_link_alloc(); + bsc.link.the_link->dpc = bsc.dpc; + bsc.link.the_link->opc = bsc.opc; + bsc.link.the_link->link = 0; + bsc.link.the_link->sltm_once = bsc.once; + bsc.link.bsc = &bsc; + + if (bsc.udp_ip) { + LOGP(DINP, LOGL_NOTICE, "Using UDP MTP mode.\n"); + + /* setup SNMP first, it is blocking */ + bsc.link.udp.session = snmp_mtp_session_create(bsc.udp_ip); + if (!bsc.link.udp.session) + return -1; + + /* now connect to the transport */ + if (link_udp_init(&bsc.link, bsc.src_port, bsc.udp_ip, bsc.udp_port) != 0) + return -1; + + /* + * We will ask the MTP link to be taken down for two + * timeouts of the BSC to make sure we are missing the + * SLTM and it begins a reset. Then we will take it up + * again and do the usual business. + */ + snmp_mtp_deactivate(bsc.link.udp.session); + bsc.start_timer.cb = start_rest; + bsc.start_timer.data = &bsc; + bsc_schedule_timer(&bsc.start_timer, bsc.link.udp.reset_timeout, 0); + LOGP(DMSC, LOGL_NOTICE, "Making sure SLTM will timeout.\n"); + } else { + LOGP(DINP, LOGL_NOTICE, "Using NexusWare C7 input.\n"); + if (link_c7_init(&bsc.link) != 0) + return -1; + + /* give time to things to start*/ + bsc.start_timer.cb = start_rest; + bsc.start_timer.data = &bsc; + bsc_schedule_timer(&bsc.start_timer, 30, 0); + LOGP(DMSC, LOGL_NOTICE, "Waiting to continue to startup.\n"); + } + + + while (1) { + bsc_select_main(0); + } + + return 0; +} + +void release_bsc_resources(struct bsc_data *bsc) +{ + /* clear pending messages from the MSC */ + msc_clear_queue(bsc); +} + +struct msgb *create_sccp_rlc(struct sccp_source_reference *src_ref, + struct sccp_source_reference *dst) +{ + abort(); + return NULL; +} + +struct msgb *create_reset() +{ + abort(); + return NULL; +} + +void update_con_state(struct mtp_link *link, int rc, struct sccp_parse_result *res, struct msgb *msg, int from_msc, int sls) +{ + LOGP(DMSC, LOGL_ERROR, "Should not be called.\n"); + return; +} + +unsigned int sls_for_src_ref(struct sccp_source_reference *ref) +{ + return 13; +} + +int bsc_ussd_handle_in_msg(struct bsc_data *bsc, struct sccp_parse_result *res, struct msgb *msg) +{ + return 0; +} + +int bsc_ussd_handle_out_msg(struct bsc_data *bsc, struct sccp_parse_result *res, struct msgb *msg) +{ + return 0; +} |