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 #include <netdb.h>
  37
  38 #include <gdbus.h>
  39
  40 #ifdef HAVE_CAPNG
  41 #include <cap-ng.h>
  42 #endif
  43
  44 #include "connman.h"
  45
  46 static struct {
  47         connman_bool_t bg_scan;
  48         char **pref_timeservers;
  49         unsigned int *auto_connect;
  50         unsigned int *preferred_techs;
  51         char **fallback_nameservers;
  52 } connman_settings  = {
  53         .bg_scan = TRUE,
  54         .pref_timeservers = NULL,
  55         .auto_connect = NULL,
  56         .preferred_techs = NULL,
  57         .fallback_nameservers = NULL,
  58 };
  59
  60 static GKeyFile *load_config(const char *file)
  61 {
  62         GError *err = NULL;
  63         GKeyFile *keyfile;
  64
  65         keyfile = g_key_file_new();
  66
  67         g_key_file_set_list_separator(keyfile, ',');
  68
  69         if (!g_key_file_load_from_file(keyfile, file, 0, &err)) {
  70                 if (err->code != G_FILE_ERROR_NOENT) {
  71                         connman_error("Parsing %s failed: %s", file,
  72                                                                 err->message);
  73                 }
  74
  75                 g_error_free(err);
  76                 g_key_file_free(keyfile);
  77                 return NULL;
  78         }
  79
  80         return keyfile;
  81 }
  82
  83 static uint *parse_service_types(char **str_list, gsize len)
  84 {
  85         unsigned int *type_list;
  86         int i, j;
  87         enum connman_service_type type;
  88
  89         type_list = g_try_new0(unsigned int, len + 1);
  90         if (type_list == NULL)
  91                 return NULL;
  92
  93         i = 0;
  94         j = 0;
  95         while (str_list[i] != NULL)
  96         {
  97                 type = __connman_service_string2type(str_list[i]);
  98
  99                 if (type != CONNMAN_SERVICE_TYPE_UNKNOWN) {
 100                         type_list[j] = type;
 101                         j += 1;
 102                 }
 103                 i += 1;
 104         }
 105
 106         return type_list;
 107 }
 108
 109 static char **parse_fallback_nameservers(char **nameservers, gsize len)
 110 {
 111         char **servers;
 112         int i, j;
 113         struct addrinfo hints;
 114         struct addrinfo *addr;
 115
 116         servers = g_try_new0(char *, len + 1);
 117         if (servers == NULL)
 118                 return NULL;
 119
 120         i = 0;
 121         j = 0;
 122         while (nameservers[i] != NULL) {
 123                 memset(&hints, 0, sizeof(struct addrinfo));
 124                 hints.ai_flags = AI_NUMERICHOST;
 125                 addr = NULL;
 126                 if (getaddrinfo(nameservers[i], NULL, &hints, &addr) == 0) {
 127                         servers[j] = g_strdup(nameservers[i]);
 128                         j += 1;
 129                 }
 130
 131                 freeaddrinfo(addr);
 132                 i += 1;
 133         }
 134
 135         return servers;
 136 }
 137
 138 static void parse_config(GKeyFile *config)
 139 {
 140         GError *error = NULL;
 141         gboolean boolean;
 142         char **timeservers;
 143         char **str_list;
 144         gsize len;
 145         char *default_auto_connect[] = {
 146                 "wifi",
 147                 "ethernet",
 148                 "cellular",
 149         };
 150
 151         if (config == NULL) {
 152                 connman_settings.auto_connect =
 153                         parse_service_types(default_auto_connect, 3);
 154                 return;
 155         }
 156
 157         DBG("parsing main.conf");
 158
 159         boolean = g_key_file_get_boolean(config, "General",
 160                                                 "BackgroundScanning", &error);
 161         if (error == NULL)
 162                 connman_settings.bg_scan = boolean;
 163
 164         g_clear_error(&error);
 165
 166         timeservers = g_key_file_get_string_list(config, "General",
 167                                                 "FallbackTimeservers", NULL, &error);
 168         if (error == NULL)
 169                 connman_settings.pref_timeservers = timeservers;
 170
 171         g_clear_error(&error);
 172
 173         str_list = g_key_file_get_string_list(config, "General",
 174                         "DefaultAutoConnectTechnologies", &len, &error);
 175
 176         if (error == NULL)
 177                 connman_settings.auto_connect =
 178                         parse_service_types(str_list, len);
 179         else
 180                 connman_settings.auto_connect =
 181                         parse_service_types(default_auto_connect, 3);
 182
 183         g_strfreev(str_list);
 184
 185         g_clear_error(&error);
 186
 187         str_list = g_key_file_get_string_list(config, "General",
 188                         "PreferredTechnologies", &len, &error);
 189
 190         if (error == NULL)
 191                 connman_settings.preferred_techs =
 192                         parse_service_types(str_list, len);
 193
 194         g_strfreev(str_list);
 195
 196         g_clear_error(&error);
 197
 198         str_list = g_key_file_get_string_list(config, "General",
 199                         "FallbackNameservers", &len, &error);
 200
 201         if (error == NULL)
 202                 connman_settings.fallback_nameservers =
 203                         parse_fallback_nameservers(str_list, len);
 204
 205         g_strfreev(str_list);
 206
 207         g_clear_error(&error);
 208 }
 209
 210 static GMainLoop *main_loop = NULL;
 211
 212 static unsigned int __terminated = 0;
 213
 214 static gboolean signal_handler(GIOChannel *channel, GIOCondition cond,
 215                                                         gpointer user_data)
 216 {
 217         struct signalfd_siginfo si;
 218         ssize_t result;
 219         int fd;
 220
 221         if (cond & (G_IO_NVAL | G_IO_ERR | G_IO_HUP))
 222                 return FALSE;
 223
 224         fd = g_io_channel_unix_get_fd(channel);
 225
 226         result = read(fd, &si, sizeof(si));
 227         if (result != sizeof(si))
 228                 return FALSE;
 229
 230         switch (si.ssi_signo) {
 231         case SIGINT:
 232         case SIGTERM:
 233                 if (__terminated == 0) {
 234                         connman_info("Terminating");
 235                         g_main_loop_quit(main_loop);
 236                 }
 237
 238                 __terminated = 1;
 239                 break;
 240         }
 241
 242         return TRUE;
 243 }
 244
 245 static guint setup_signalfd(void)
 246 {
 247         GIOChannel *channel;
 248         guint source;
 249         sigset_t mask;
 250         int fd;
 251
 252         sigemptyset(&mask);
 253         sigaddset(&mask, SIGINT);
 254         sigaddset(&mask, SIGTERM);
 255
 256         if (sigprocmask(SIG_BLOCK, &mask, NULL) < 0) {
 257                 perror("Failed to set signal mask");
 258                 return 0;
 259         }
 260
 261         fd = signalfd(-1, &mask, 0);
 262         if (fd < 0) {
 263                 perror("Failed to create signal descriptor");
 264                 return 0;
 265         }
 266
 267         channel = g_io_channel_unix_new(fd);
 268
 269         g_io_channel_set_close_on_unref(channel, TRUE);
 270         g_io_channel_set_encoding(channel, NULL, NULL);
 271         g_io_channel_set_buffered(channel, FALSE);
 272
 273         source = g_io_add_watch(channel,
 274                                 G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_NVAL,
 275                                 signal_handler, NULL);
 276
 277         g_io_channel_unref(channel);
 278
 279         return source;
 280 }
 281
 282 static void disconnect_callback(DBusConnection *conn, void *user_data)
 283 {
 284         connman_error("D-Bus disconnect");
 285
 286         g_main_loop_quit(main_loop);
 287 }
 288
 289 static gchar *option_debug = NULL;
 290 static gchar *option_device = NULL;
 291 static gchar *option_plugin = NULL;
 292 static gchar *option_nodevice = NULL;
 293 static gchar *option_noplugin = NULL;
 294 static gchar *option_wifi = NULL;
 295 static gboolean option_detach = TRUE;
 296 static gboolean option_dnsproxy = TRUE;
 297 static gboolean option_compat = FALSE;
 298 static gboolean option_version = FALSE;
 299
 300 static gboolean parse_debug(const char *key, const char *value,
 301                                         gpointer user_data, GError **error)
 302 {
 303         if (value)
 304                 option_debug = g_strdup(value);
 305         else
 306                 option_debug = g_strdup("*");
 307
 308         return TRUE;
 309 }
 310
 311 static GOptionEntry options[] = {
 312         { "debug", 'd', G_OPTION_FLAG_OPTIONAL_ARG,
 313                                 G_OPTION_ARG_CALLBACK, parse_debug,
 314                                 "Specify debug options to enable", "DEBUG" },
 315         { "device", 'i', 0, G_OPTION_ARG_STRING, &option_device,
 316                         "Specify networking device or interface", "DEV" },
 317         { "nodevice", 'I', 0, G_OPTION_ARG_STRING, &option_nodevice,
 318                         "Specify networking interface to ignore", "DEV" },
 319         { "plugin", 'p', 0, G_OPTION_ARG_STRING, &option_plugin,
 320                                 "Specify plugins to load", "NAME,..." },
 321         { "noplugin", 'P', 0, G_OPTION_ARG_STRING, &option_noplugin,
 322                                 "Specify plugins not to load", "NAME,..." },
 323         { "wifi", 'W', 0, G_OPTION_ARG_STRING, &option_wifi,
 324                                 "Specify driver for WiFi/Supplicant", "NAME" },
 325         { "nodaemon", 'n', G_OPTION_FLAG_REVERSE,
 326                                 G_OPTION_ARG_NONE, &option_detach,
 327                                 "Don't fork daemon to background" },
 328         { "nodnsproxy", 'r', G_OPTION_FLAG_REVERSE,
 329                                 G_OPTION_ARG_NONE, &option_dnsproxy,
 330                                 "Don't enable DNS Proxy" },
 331         { "compat", 'c', 0, G_OPTION_ARG_NONE, &option_compat,
 332                                 "(obsolete)" },
 333         { "version", 'v', 0, G_OPTION_ARG_NONE, &option_version,
 334                                 "Show version information and exit" },
 335         { NULL },
 336 };
 337
 338 const char *connman_option_get_string(const char *key)
 339 {
 340         if (g_strcmp0(key, "wifi") == 0) {
 341                 if (option_wifi == NULL)
 342                         return "nl80211,wext";
 343                 else
 344                         return option_wifi;
 345         }
 346
 347         return NULL;
 348 }
 349
 350 connman_bool_t connman_setting_get_bool(const char *key)
 351 {
 352         if (g_str_equal(key, "BackgroundScanning") == TRUE)
 353                 return connman_settings.bg_scan;
 354
 355         return FALSE;
 356 }
 357
 358 char **connman_setting_get_string_list(const char *key)
 359 {
 360         if (g_str_equal(key, "FallbackTimeservers") == TRUE)
 361                 return connman_settings.pref_timeservers;
 362
 363         if (g_str_equal(key, "FallbackNameservers") == TRUE)
 364                 return connman_settings.fallback_nameservers;
 365
 366         return NULL;
 367 }
 368
 369 unsigned int *connman_setting_get_uint_list(const char *key)
 370 {
 371         if (g_str_equal(key, "DefaultAutoConnectTechnologies") == TRUE)
 372                 return connman_settings.auto_connect;
 373
 374         if (g_str_equal(key, "PreferredTechnologies") == TRUE)
 375                 return connman_settings.preferred_techs;
 376
 377         return NULL;
 378 }
 379
 380 int main(int argc, char *argv[])
 381 {
 382         GOptionContext *context;
 383         GError *error = NULL;
 384         DBusConnection *conn;
 385         DBusError err;
 386         GKeyFile *config;
 387         guint signal;
 388
 389 #ifdef HAVE_CAPNG
 390         /* Drop capabilities */
 391 #endif
 392
 393 #ifdef NEED_THREADS
 394         if (g_thread_supported() == FALSE)
 395                 g_thread_init(NULL);
 396 #endif
 397
 398         context = g_option_context_new(NULL);
 399         g_option_context_add_main_entries(context, options, NULL);
 400
 401         if (g_option_context_parse(context, &argc, &argv, &error) == FALSE) {
 402                 if (error != NULL) {
 403                         g_printerr("%s\n", error->message);
 404                         g_error_free(error);
 405                 } else
 406                         g_printerr("An unknown error occurred\n");
 407                 exit(1);
 408         }
 409
 410         g_option_context_free(context);
 411
 412         if (option_version == TRUE) {
 413                 printf("%s\n", VERSION);
 414                 exit(0);
 415         }
 416
 417         if (option_detach == TRUE) {
 418                 if (daemon(0, 0)) {
 419                         perror("Can't start daemon");
 420                         exit(1);
 421                 }
 422         }
 423
 424         if (mkdir(STATEDIR, S_IRUSR | S_IWUSR | S_IXUSR |
 425                                 S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) < 0) {
 426                 if (errno != EEXIST)
 427                         perror("Failed to create state directory");
 428         }
 429
 430         if (mkdir(STORAGEDIR, S_IRUSR | S_IWUSR | S_IXUSR |
 431                                 S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) < 0) {
 432                 if (errno != EEXIST)
 433                         perror("Failed to create storage directory");
 434         }
 435
 436         umask(0077);
 437
 438         main_loop = g_main_loop_new(NULL, FALSE);
 439
 440 #ifdef NEED_THREADS
 441         if (dbus_threads_init_default() == FALSE) {
 442                 fprintf(stderr, "Can't init usage of threads\n");
 443                 exit(1);
 444         }
 445 #endif
 446
 447         signal = setup_signalfd();
 448
 449         dbus_error_init(&err);
 450
 451         conn = g_dbus_setup_bus(DBUS_BUS_SYSTEM, CONNMAN_SERVICE, &err);
 452         if (conn == NULL) {
 453                 if (dbus_error_is_set(&err) == TRUE) {
 454                         fprintf(stderr, "%s\n", err.message);
 455                         dbus_error_free(&err);
 456                 } else
 457                         fprintf(stderr, "Can't register with system bus\n");
 458                 exit(1);
 459         }
 460
 461         g_dbus_set_disconnect_function(conn, disconnect_callback, NULL, NULL);
 462
 463         __connman_log_init(argv[0], option_debug, option_detach);
 464
 465         __connman_dbus_init(conn);
 466
 467         config = load_config(CONFIGDIR "/main.conf");
 468         parse_config(config);
 469         if (config != NULL)
 470                 g_key_file_free(config);
 471
 472         __connman_storage_migrate();
 473         __connman_technology_init();
 474         __connman_notifier_init();
 475         __connman_service_init();
 476         __connman_provider_init();
 477         __connman_network_init();
 478         __connman_device_init(option_device, option_nodevice);
 479
 480         __connman_agent_init();
 481         __connman_ippool_init();
 482         __connman_iptables_init();
 483         __connman_nat_init();
 484         __connman_tethering_init();
 485         __connman_counter_init();
 486         __connman_manager_init();
 487         __connman_config_init();
 488         __connman_stats_init();
 489         __connman_clock_init();
 490
 491         __connman_resolver_init(option_dnsproxy);
 492         __connman_ipconfig_init();
 493         __connman_rtnl_init();
 494         __connman_task_init();
 495         __connman_proxy_init();
 496         __connman_detect_init();
 497         __connman_session_init();
 498         __connman_timeserver_init();
 499         __connman_connection_init();
 500
 501         __connman_plugin_init(option_plugin, option_noplugin);
 502
 503         __connman_rtnl_start();
 504         __connman_dhcp_init();
 505         __connman_dhcpv6_init();
 506         __connman_wpad_init();
 507         __connman_wispr_init();
 508         __connman_rfkill_init();
 509
 510         g_free(option_device);
 511         g_free(option_plugin);
 512         g_free(option_nodevice);
 513         g_free(option_noplugin);
 514
 515         g_main_loop_run(main_loop);
 516
 517         g_source_remove(signal);
 518
 519         __connman_rfkill_cleanup();
 520         __connman_wispr_cleanup();
 521         __connman_wpad_cleanup();
 522         __connman_dhcpv6_cleanup();
 523         __connman_dhcp_cleanup();
 524         __connman_provider_cleanup();
 525         __connman_plugin_cleanup();
 526         __connman_connection_cleanup();
 527         __connman_timeserver_cleanup();
 528         __connman_session_cleanup();
 529         __connman_detect_cleanup();
 530         __connman_proxy_cleanup();
 531         __connman_task_cleanup();
 532         __connman_rtnl_cleanup();
 533         __connman_resolver_cleanup();
 534
 535         __connman_clock_cleanup();
 536         __connman_stats_cleanup();
 537         __connman_config_cleanup();
 538         __connman_manager_cleanup();
 539         __connman_counter_cleanup();
 540         __connman_agent_cleanup();
 541         __connman_tethering_cleanup();
 542         __connman_nat_cleanup();
 543         __connman_iptables_cleanup();
 544         __connman_ippool_cleanup();
 545         __connman_device_cleanup();
 546         __connman_network_cleanup();
 547         __connman_service_cleanup();
 548         __connman_ipconfig_cleanup();
 549         __connman_notifier_cleanup();
 550         __connman_technology_cleanup();
 551
 552         __connman_dbus_cleanup();
 553
 554         __connman_log_cleanup();
 555
 556         dbus_connection_unref(conn);
 557
 558         g_main_loop_unref(main_loop);
 559
 560         if (connman_settings.pref_timeservers != NULL)
 561                 g_strfreev(connman_settings.pref_timeservers);
 562
 563         g_free(connman_settings.auto_connect);
 564         g_free(connman_settings.preferred_techs);
 565         g_strfreev(connman_settings.fallback_nameservers);
 566
 567         g_free(option_debug);
 568
 569         return 0;
 570 }