src/main.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2010  Intel Corporation. All rights reserved.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License version 2 as
   9  *  published by the Free Software Foundation.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <errno.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <unistd.h>
  30 #include <string.h>
  31 #include <signal.h>
  32 #include <sys/signalfd.h>
  33 #include <getopt.h>
  34 #include <sys/stat.h>
  35 #include <net/if.h>
  36
  37 #include <gdbus.h>
  38
  39 #ifdef HAVE_CAPNG
  40 #include <cap-ng.h>
  41 #endif
  42
  43 #include "connman.h"
  44
  45 static struct {
  46         connman_bool_t bg_scan;
  47 } connman_settings  = {
  48         .bg_scan = TRUE,
  49 };
  50
  51 static GKeyFile *load_config(const char *file)
  52 {
  53         GError *err = NULL;
  54         GKeyFile *keyfile;
  55
  56         keyfile = g_key_file_new();
  57
  58         g_key_file_set_list_separator(keyfile, ',');
  59
  60         if (!g_key_file_load_from_file(keyfile, file, 0, &err)) {
  61                 if (err->code != G_FILE_ERROR_NOENT) {
  62                         connman_error("Parsing %s failed: %s", file,
  63                                                                 err->message);
  64                 }
  65
  66                 g_error_free(err);
  67                 g_key_file_free(keyfile);
  68                 return NULL;
  69         }
  70
  71         return keyfile;
  72 }
  73
  74 static void parse_config(GKeyFile *config)
  75 {
  76         GError *error = NULL;
  77         gboolean boolean;
  78
  79         if (config == NULL)
  80                 return;
  81
  82         DBG("parsing main.conf");
  83
  84         boolean = g_key_file_get_boolean(config, "General",
  85                                                 "BackgroundScanning", &error);
  86         if (error == NULL)
  87                 connman_settings.bg_scan = boolean;
  88
  89         g_clear_error(&error);
  90 }
  91
  92 static GMainLoop *main_loop = NULL;
  93
  94 static unsigned int __terminated = 0;
  95
  96 static gboolean signal_handler(GIOChannel *channel, GIOCondition cond,
  97                                                         gpointer user_data)
  98 {
  99         struct signalfd_siginfo si;
 100         ssize_t result;
 101         int fd;
 102
 103         if (cond & (G_IO_NVAL | G_IO_ERR | G_IO_HUP))
 104                 return FALSE;
 105
 106         fd = g_io_channel_unix_get_fd(channel);
 107
 108         result = read(fd, &si, sizeof(si));
 109         if (result != sizeof(si))
 110                 return FALSE;
 111
 112         switch (si.ssi_signo) {
 113         case SIGINT:
 114         case SIGTERM:
 115                 if (__terminated == 0) {
 116                         connman_info("Terminating");
 117                         g_main_loop_quit(main_loop);
 118                 }
 119
 120                 __terminated = 1;
 121                 break;
 122         }
 123
 124         return TRUE;
 125 }
 126
 127 static guint setup_signalfd(void)
 128 {
 129         GIOChannel *channel;
 130         guint source;
 131         sigset_t mask;
 132         int fd;
 133
 134         sigemptyset(&mask);
 135         sigaddset(&mask, SIGINT);
 136         sigaddset(&mask, SIGTERM);
 137
 138         if (sigprocmask(SIG_BLOCK, &mask, NULL) < 0) {
 139                 perror("Failed to set signal mask");
 140                 return 0;
 141         }
 142
 143         fd = signalfd(-1, &mask, 0);
 144         if (fd < 0) {
 145                 perror("Failed to create signal descriptor");
 146                 return 0;
 147         }
 148
 149         channel = g_io_channel_unix_new(fd);
 150
 151         g_io_channel_set_close_on_unref(channel, TRUE);
 152         g_io_channel_set_encoding(channel, NULL, NULL);
 153         g_io_channel_set_buffered(channel, FALSE);
 154
 155         source = g_io_add_watch(channel,
 156                                 G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_NVAL,
 157                                 signal_handler, NULL);
 158
 159         g_io_channel_unref(channel);
 160
 161         return source;
 162 }
 163
 164 static void disconnect_callback(DBusConnection *conn, void *user_data)
 165 {
 166         connman_error("D-Bus disconnect");
 167
 168         g_main_loop_quit(main_loop);
 169 }
 170
 171 static gchar *option_debug = NULL;
 172 static gchar *option_device = NULL;
 173 static gchar *option_plugin = NULL;
 174 static gchar *option_nodevice = NULL;
 175 static gchar *option_noplugin = NULL;
 176 static gchar *option_wifi = NULL;
 177 static gboolean option_detach = TRUE;
 178 static gboolean option_dnsproxy = TRUE;
 179 static gboolean option_compat = FALSE;
 180 static gboolean option_version = FALSE;
 181
 182 static gboolean parse_debug(const char *key, const char *value,
 183                                         gpointer user_data, GError **error)
 184 {
 185         if (value)
 186                 option_debug = g_strdup(value);
 187         else
 188                 option_debug = g_strdup("*");
 189
 190         return TRUE;
 191 }
 192
 193 static GOptionEntry options[] = {
 194         { "debug", 'd', G_OPTION_FLAG_OPTIONAL_ARG,
 195                                 G_OPTION_ARG_CALLBACK, parse_debug,
 196                                 "Specify debug options to enable", "DEBUG" },
 197         { "device", 'i', 0, G_OPTION_ARG_STRING, &option_device,
 198                         "Specify networking device or interface", "DEV" },
 199         { "nodevice", 'I', 0, G_OPTION_ARG_STRING, &option_nodevice,
 200                         "Specify networking interface to ignore", "DEV" },
 201         { "plugin", 'p', 0, G_OPTION_ARG_STRING, &option_plugin,
 202                                 "Specify plugins to load", "NAME,..." },
 203         { "noplugin", 'P', 0, G_OPTION_ARG_STRING, &option_noplugin,
 204                                 "Specify plugins not to load", "NAME,..." },
 205         { "wifi", 'W', 0, G_OPTION_ARG_STRING, &option_wifi,
 206                                 "Specify driver for WiFi/Supplicant", "NAME" },
 207         { "nodaemon", 'n', G_OPTION_FLAG_REVERSE,
 208                                 G_OPTION_ARG_NONE, &option_detach,
 209                                 "Don't fork daemon to background" },
 210         { "nodnsproxy", 'r', G_OPTION_FLAG_REVERSE,
 211                                 G_OPTION_ARG_NONE, &option_dnsproxy,
 212                                 "Don't enable DNS Proxy" },
 213         { "compat", 'c', 0, G_OPTION_ARG_NONE, &option_compat,
 214                                 "(obsolete)" },
 215         { "version", 'v', 0, G_OPTION_ARG_NONE, &option_version,
 216                                 "Show version information and exit" },
 217         { NULL },
 218 };
 219
 220 const char *connman_option_get_string(const char *key)
 221 {
 222         if (g_strcmp0(key, "wifi") == 0) {
 223                 if (option_wifi == NULL)
 224                         return "nl80211,wext";
 225                 else
 226                         return option_wifi;
 227         }
 228
 229         return NULL;
 230 }
 231
 232 connman_bool_t connman_setting_get_bool(const char *key)
 233 {
 234         if (g_str_equal(key, "BackgroundScanning") == TRUE)
 235                 return connman_settings.bg_scan;
 236
 237         return FALSE;
 238 }
 239
 240 int main(int argc, char *argv[])
 241 {
 242         GOptionContext *context;
 243         GError *error = NULL;
 244         DBusConnection *conn;
 245         DBusError err;
 246         GKeyFile *config;
 247         guint signal;
 248
 249 #ifdef HAVE_CAPNG
 250         /* Drop capabilities */
 251 #endif
 252
 253 #ifdef NEED_THREADS
 254         if (g_thread_supported() == FALSE)
 255                 g_thread_init(NULL);
 256 #endif
 257
 258         context = g_option_context_new(NULL);
 259         g_option_context_add_main_entries(context, options, NULL);
 260
 261         if (g_option_context_parse(context, &argc, &argv, &error) == FALSE) {
 262                 if (error != NULL) {
 263                         g_printerr("%s\n", error->message);
 264                         g_error_free(error);
 265                 } else
 266                         g_printerr("An unknown error occurred\n");
 267                 exit(1);
 268         }
 269
 270         g_option_context_free(context);
 271
 272         if (option_version == TRUE) {
 273                 printf("%s\n", VERSION);
 274                 exit(0);
 275         }
 276
 277         if (option_detach == TRUE) {
 278                 if (daemon(0, 0)) {
 279                         perror("Can't start daemon");
 280                         exit(1);
 281                 }
 282         }
 283
 284         if (mkdir(STATEDIR, S_IRUSR | S_IWUSR | S_IXUSR |
 285                                 S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) < 0) {
 286                 if (errno != EEXIST)
 287                         perror("Failed to create state directory");
 288         }
 289
 290         if (mkdir(STORAGEDIR, S_IRUSR | S_IWUSR | S_IXUSR |
 291                                 S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) < 0) {
 292                 if (errno != EEXIST)
 293                         perror("Failed to create storage directory");
 294         }
 295
 296         umask(0077);
 297
 298         main_loop = g_main_loop_new(NULL, FALSE);
 299
 300 #ifdef NEED_THREADS
 301         if (dbus_threads_init_default() == FALSE) {
 302                 fprintf(stderr, "Can't init usage of threads\n");
 303                 exit(1);
 304         }
 305 #endif
 306
 307         signal = setup_signalfd();
 308
 309         dbus_error_init(&err);
 310
 311         conn = g_dbus_setup_bus(DBUS_BUS_SYSTEM, CONNMAN_SERVICE, &err);
 312         if (conn == NULL) {
 313                 if (dbus_error_is_set(&err) == TRUE) {
 314                         fprintf(stderr, "%s\n", err.message);
 315                         dbus_error_free(&err);
 316                 } else
 317                         fprintf(stderr, "Can't register with system bus\n");
 318                 exit(1);
 319         }
 320
 321         g_dbus_set_disconnect_function(conn, disconnect_callback, NULL, NULL);
 322
 323         __connman_log_init(option_debug, option_detach);
 324
 325         __connman_dbus_init(conn);
 326
 327         config = load_config(CONFIGDIR "/main.conf");
 328
 329         parse_config(config);
 330
 331         __connman_storage_migrate();
 332         __connman_technology_init();
 333         __connman_notifier_init();
 334         __connman_location_init();
 335         __connman_service_init();
 336         __connman_provider_init();
 337         __connman_network_init();
 338         __connman_device_init(option_device, option_nodevice);
 339
 340         __connman_agent_init();
 341         __connman_iptables_init();
 342         __connman_tethering_init();
 343         __connman_counter_init();
 344         __connman_manager_init();
 345         __connman_config_init();
 346         __connman_stats_init();
 347         __connman_clock_init();
 348
 349         __connman_resolver_init(option_dnsproxy);
 350         __connman_ipconfig_init();
 351         __connman_rtnl_init();
 352         __connman_task_init();
 353         __connman_proxy_init();
 354         __connman_detect_init();
 355         __connman_session_init();
 356         __connman_timeserver_init();
 357         __connman_connection_init();
 358
 359         __connman_plugin_init(option_plugin, option_noplugin);
 360
 361         __connman_rtnl_start();
 362         __connman_dhcp_init();
 363         __connman_wpad_init();
 364         __connman_wispr_init();
 365         __connman_rfkill_init();
 366
 367         g_free(option_device);
 368         g_free(option_plugin);
 369         g_free(option_nodevice);
 370         g_free(option_noplugin);
 371
 372         g_main_loop_run(main_loop);
 373
 374         g_source_remove(signal);
 375
 376         __connman_rfkill_cleanup();
 377         __connman_wispr_cleanup();
 378         __connman_wpad_cleanup();
 379         __connman_dhcp_cleanup();
 380         __connman_provider_cleanup();
 381         __connman_plugin_cleanup();
 382         __connman_connection_cleanup();
 383         __connman_timeserver_cleanup();
 384         __connman_session_cleanup();
 385         __connman_detect_cleanup();
 386         __connman_proxy_cleanup();
 387         __connman_task_cleanup();
 388         __connman_rtnl_cleanup();
 389         __connman_ipconfig_cleanup();
 390         __connman_resolver_cleanup();
 391
 392         __connman_clock_cleanup();
 393         __connman_stats_cleanup();
 394         __connman_config_cleanup();
 395         __connman_manager_cleanup();
 396         __connman_counter_cleanup();
 397         __connman_agent_cleanup();
 398         __connman_tethering_cleanup();
 399         __connman_iptables_cleanup();
 400         __connman_device_cleanup();
 401         __connman_network_cleanup();
 402         __connman_service_cleanup();
 403         __connman_location_cleanup();
 404         __connman_notifier_cleanup();
 405         __connman_technology_cleanup();
 406
 407         __connman_dbus_cleanup();
 408
 409         __connman_log_cleanup();
 410
 411         dbus_connection_unref(conn);
 412
 413         g_main_loop_unref(main_loop);
 414
 415         if (config)
 416                 g_key_file_free(config);
 417
 418         return 0;
 419 }