290 lines
6.8 KiB
C
290 lines
6.8 KiB
C
/* Main method of the layer2/3 stack */
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/* (C) 2010 by Holger Hans Peter Freyther
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* (C) 2010 by Harald Welte <laforge@gnumonks.org>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <osmocom/bb/common/osmocom_data.h>
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#include <osmocom/bb/common/l1ctl.h>
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#include <osmocom/bb/common/l1l2_interface.h>
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#include <osmocom/bb/common/sap_interface.h>
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#include <osmocom/bb/misc/layer3.h>
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#include <osmocom/bb/common/logging.h>
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#include <osmocom/bb/common/l23_app.h>
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#include <osmocom/core/msgb.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/core/select.h>
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#include <osmocom/core/linuxlist.h>
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#include <osmocom/core/gsmtap_util.h>
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#include <osmocom/core/gsmtap.h>
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#include <osmocom/core/utils.h>
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#include <arpa/inet.h>
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#define _GNU_SOURCE
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#include <getopt.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <signal.h>
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struct log_target *stderr_target;
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void *l23_ctx = NULL;
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static char *layer2_socket_path = "/tmp/osmocom_l2";
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static char *sap_socket_path = "/tmp/osmocom_sap";
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struct llist_head ms_list;
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static struct osmocom_ms *ms = NULL;
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static char *gsmtap_ip = NULL;
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static char *vty_ip = "127.0.0.1";
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unsigned short vty_port = 4247;
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int (*l23_app_work) (struct osmocom_ms *ms) = NULL;
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int (*l23_app_exit) (struct osmocom_ms *ms) = NULL;
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int quit = 0;
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struct gsmtap_inst *gsmtap_inst;
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const char *openbsc_copyright =
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"%s"
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"%s\n"
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"License GPLv2+: GNU GPL version 2 or later "
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"<http://gnu.org/licenses/gpl.html>\n"
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"This is free software: you are free to change and redistribute it.\n"
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"There is NO WARRANTY, to the extent permitted by law.\n\n";
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static void print_usage(const char *app)
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{
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printf("Usage: %s\n", app);
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}
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static void print_help()
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{
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int options = 0xff;
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struct l23_app_info *app = l23_app_info();
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if (app && app->cfg_supported != 0)
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options = app->cfg_supported();
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printf(" Some help...\n");
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printf(" -h --help this text\n");
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printf(" -s --socket /tmp/osmocom_l2. Path to the unix "
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"domain socket (l2)\n");
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if (options & L23_OPT_SAP)
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printf(" -S --sap /tmp/osmocom_sap. Path to the "
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"unix domain socket (BTSAP)\n");
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if (options & L23_OPT_ARFCN)
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printf(" -a --arfcn NR The ARFCN to be used for layer2.\n");
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if (options & L23_OPT_TAP)
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printf(" -i --gsmtap-ip The destination IP used for GSMTAP.\n");
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if (options & L23_OPT_VTY)
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printf(" -v --vty-port The VTY port number to telnet "
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"to. (default %u)\n", vty_port);
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if (options & L23_OPT_DBG)
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printf(" -d --debug Change debug flags.\n");
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if (options & L23_OPT_VTYIP)
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printf(" -u --vty-ip The VTY IP to bind telnet to. "
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"(default %s)\n", vty_ip);
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if (app && app->cfg_print_help)
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app->cfg_print_help();
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}
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static void build_config(char **opt, struct option **option)
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{
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struct l23_app_info *app;
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struct option *app_opp = NULL;
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int app_len = 0, len;
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static struct option long_options[] = {
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{"help", 0, 0, 'h'},
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{"socket", 1, 0, 's'},
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{"sap", 1, 0, 'S'},
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{"arfcn", 1, 0, 'a'},
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{"gsmtap-ip", 1, 0, 'i'},
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{"vty-ip", 1, 0, 'u'},
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{"vty-port", 1, 0, 'v'},
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{"debug", 1, 0, 'd'},
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};
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app = l23_app_info();
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*opt = talloc_asprintf(l23_ctx, "hs:S:a:i:v:d:u:%s",
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app && app->getopt_string ? app->getopt_string : "");
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len = ARRAY_SIZE(long_options);
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if (app && app->cfg_getopt_opt)
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app_len = app->cfg_getopt_opt(&app_opp);
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*option = talloc_zero_array(l23_ctx, struct option, len + app_len + 1);
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memcpy(*option, long_options, sizeof(long_options));
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if (app_opp)
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memcpy(*option + len, app_opp, app_len * sizeof(struct option));
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}
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static void handle_options(int argc, char **argv)
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{
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struct l23_app_info *app = l23_app_info();
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struct option *long_options;
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char *opt;
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build_config(&opt, &long_options);
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while (1) {
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int option_index = 0, c;
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c = getopt_long(argc, argv, opt,
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long_options, &option_index);
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if (c == -1)
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break;
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switch (c) {
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case 'h':
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print_usage(argv[0]);
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print_help();
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exit(0);
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break;
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case 's':
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layer2_socket_path = talloc_strdup(l23_ctx, optarg);
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break;
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case 'S':
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sap_socket_path = talloc_strdup(l23_ctx, optarg);
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break;
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case 'a':
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ms->test_arfcn = atoi(optarg);
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break;
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case 'i':
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gsmtap_ip = optarg;
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break;
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case 'u':
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vty_ip = optarg;
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break;
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case 'v':
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vty_port = atoi(optarg);
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break;
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case 'd':
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log_parse_category_mask(stderr_target, optarg);
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break;
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default:
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if (app && app->cfg_handle_opt)
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app->cfg_handle_opt(c, optarg);
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break;
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}
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}
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talloc_free(opt);
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talloc_free(long_options);
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}
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void sighandler(int sigset)
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{
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int rc = 0;
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if (sigset == SIGHUP || sigset == SIGPIPE)
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return;
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fprintf(stderr, "Signal %d received.\n", sigset);
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if (l23_app_exit)
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rc = l23_app_exit(ms);
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if (rc != -EBUSY)
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exit (0);
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}
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static void print_copyright()
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{
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struct l23_app_info *app;
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app = l23_app_info();
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printf(openbsc_copyright,
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app && app->copyright ? app->copyright : "",
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app && app->contribution ? app->contribution : "");
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}
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int main(int argc, char **argv)
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{
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int rc;
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INIT_LLIST_HEAD(&ms_list);
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log_init(&log_info, NULL);
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stderr_target = log_target_create_stderr();
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log_add_target(stderr_target);
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log_set_all_filter(stderr_target, 1);
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l23_ctx = talloc_named_const(NULL, 1, "layer2 context");
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ms = talloc_zero(l23_ctx, struct osmocom_ms);
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if (!ms) {
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fprintf(stderr, "Failed to allocate MS\n");
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exit(1);
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}
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print_copyright();
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llist_add_tail(&ms->entity, &ms_list);
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ms->name = talloc_strdup(ms, "1");
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ms->test_arfcn = 871;
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handle_options(argc, argv);
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rc = layer2_open(ms, layer2_socket_path);
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if (rc < 0) {
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fprintf(stderr, "Failed during layer2_open()\n");
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exit(1);
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}
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ms->lapdm_channel.lapdm_dcch.l1_ctx = ms;
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ms->lapdm_channel.lapdm_dcch.l3_ctx = ms;
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ms->lapdm_channel.lapdm_acch.l1_ctx = ms;
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ms->lapdm_channel.lapdm_acch.l3_ctx = ms;
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lapdm_channel_init(&ms->lapdm_channel, LAPDM_MODE_MS);
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lapdm_channel_set_l1(&ms->lapdm_channel, l1ctl_ph_prim_cb, ms);
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rc = l23_app_init(ms);
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if (rc < 0)
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exit(1);
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if (gsmtap_ip) {
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gsmtap_inst = gsmtap_source_init(gsmtap_ip, GSMTAP_UDP_PORT, 1);
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if (!gsmtap_inst) {
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fprintf(stderr, "Failed during gsmtap_init()\n");
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exit(1);
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}
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gsmtap_source_add_sink(gsmtap_inst);
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}
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signal(SIGINT, sighandler);
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signal(SIGHUP, sighandler);
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signal(SIGTERM, sighandler);
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signal(SIGPIPE, sighandler);
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while (!quit) {
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if (l23_app_work)
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l23_app_work(ms);
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osmo_select_main(0);
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}
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return 0;
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}
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