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                 NULL
 150         };
 151
 152         if (config == NULL) {
 153                 connman_settings.auto_connect =
 154                         parse_service_types(default_auto_connect, 3);
 155                 return;
 156         }
 157
 158         DBG("parsing main.conf");
 159
 160         boolean = g_key_file_get_boolean(config, "General",
 161                                                 "BackgroundScanning", &error);
 162         if (error == NULL)
 163                 connman_settings.bg_scan = boolean;
 164
 165         g_clear_error(&error);
 166
 167         timeservers = g_key_file_get_string_list(config, "General",
 168                                                 "FallbackTimeservers", NULL, &error);
 169         if (error == NULL)
 170                 connman_settings.pref_timeservers = timeservers;
 171
 172         g_clear_error(&error);
 173
 174         str_list = g_key_file_get_string_list(config, "General",
 175                         "DefaultAutoConnectTechnologies", &len, &error);
 176
 177         if (error == NULL)
 178                 connman_settings.auto_connect =
 179                         parse_service_types(str_list, len);
 180         else
 181                 connman_settings.auto_connect =
 182                         parse_service_types(default_auto_connect, 3);
 183
 184         g_strfreev(str_list);
 185
 186         g_clear_error(&error);
 187
 188         str_list = g_key_file_get_string_list(config, "General",
 189                         "PreferredTechnologies", &len, &error);
 190
 191         if (error == NULL)
 192                 connman_settings.preferred_techs =
 193                         parse_service_types(str_list, len);
 194
 195         g_strfreev(str_list);
 196
 197         g_clear_error(&error);
 198
 199         str_list = g_key_file_get_string_list(config, "General",
 200                         "FallbackNameservers", &len, &error);
 201
 202         if (error == NULL)
 203                 connman_settings.fallback_nameservers =
 204                         parse_fallback_nameservers(str_list, len);
 205
 206         g_strfreev(str_list);
 207
 208         g_clear_error(&error);
 209 }
 210
 211 static GMainLoop *main_loop = NULL;
 212
 213 static unsigned int __terminated = 0;
 214
 215 static gboolean signal_handler(GIOChannel *channel, GIOCondition cond,
 216                                                         gpointer user_data)
 217 {
 218         struct signalfd_siginfo si;
 219         ssize_t result;
 220         int fd;
 221
 222         if (cond & (G_IO_NVAL | G_IO_ERR | G_IO_HUP))
 223                 return FALSE;
 224
 225         fd = g_io_channel_unix_get_fd(channel);
 226
 227         result = read(fd, &si, sizeof(si));
 228         if (result != sizeof(si))
 229                 return FALSE;
 230
 231         switch (si.ssi_signo) {
 232         case SIGINT:
 233         case SIGTERM:
 234                 if (__terminated == 0) {
 235                         connman_info("Terminating");
 236                         g_main_loop_quit(main_loop);
 237                 }
 238
 239                 __terminated = 1;
 240                 break;
 241         }
 242
 243         return TRUE;
 244 }
 245
 246 static guint setup_signalfd(void)
 247 {
 248         GIOChannel *channel;
 249         guint source;
 250         sigset_t mask;
 251         int fd;
 252
 253         sigemptyset(&mask);
 254         sigaddset(&mask, SIGINT);
 255         sigaddset(&mask, SIGTERM);
 256
 257         if (sigprocmask(SIG_BLOCK, &mask, NULL) < 0) {
 258                 perror("Failed to set signal mask");
 259                 return 0;
 260         }
 261
 262         fd = signalfd(-1, &mask, 0);
 263         if (fd < 0) {
 264                 perror("Failed to create signal descriptor");
 265                 return 0;
 266         }
 267
 268         channel = g_io_channel_unix_new(fd);
 269
 270         g_io_channel_set_close_on_unref(channel, TRUE);
 271         g_io_channel_set_encoding(channel, NULL, NULL);
 272         g_io_channel_set_buffered(channel, FALSE);
 273
 274         source = g_io_add_watch(channel,
 275                                 G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_NVAL,
 276                                 signal_handler, NULL);
 277
 278         g_io_channel_unref(channel);
 279
 280         return source;
 281 }
 282
 283 static void disconnect_callback(DBusConnection *conn, void *user_data)
 284 {
 285         connman_error("D-Bus disconnect");
 286
 287         g_main_loop_quit(main_loop);
 288 }
 289
 290 static gchar *option_debug = NULL;
 291 static gchar *option_device = NULL;
 292 static gchar *option_plugin = NULL;
 293 static gchar *option_nodevice = NULL;
 294 static gchar *option_noplugin = NULL;
 295 static gchar *option_wifi = NULL;
 296 static gboolean option_detach = TRUE;
 297 static gboolean option_dnsproxy = TRUE;
 298 static gboolean option_compat = FALSE;
 299 static gboolean option_version = FALSE;
 300
 301 static gboolean parse_debug(const char *key, const char *value,
 302                                         gpointer user_data, GError **error)
 303 {
 304         if (value)
 305                 option_debug = g_strdup(value);
 306         else
 307                 option_debug = g_strdup("*");
 308
 309         return TRUE;
 310 }
 311
 312 static GOptionEntry options[] = {
 313         { "debug", 'd', G_OPTION_FLAG_OPTIONAL_ARG,
 314                                 G_OPTION_ARG_CALLBACK, parse_debug,
 315                                 "Specify debug options to enable", "DEBUG" },
 316         { "device", 'i', 0, G_OPTION_ARG_STRING, &option_device,
 317                         "Specify networking device or interface", "DEV" },
 318         { "nodevice", 'I', 0, G_OPTION_ARG_STRING, &option_nodevice,
 319                         "Specify networking interface to ignore", "DEV" },
 320         { "plugin", 'p', 0, G_OPTION_ARG_STRING, &option_plugin,
 321                                 "Specify plugins to load", "NAME,..." },
 322         { "noplugin", 'P', 0, G_OPTION_ARG_STRING, &option_noplugin,
 323                                 "Specify plugins not to load", "NAME,..." },
 324         { "wifi", 'W', 0, G_OPTION_ARG_STRING, &option_wifi,
 325                                 "Specify driver for WiFi/Supplicant", "NAME" },
 326         { "nodaemon", 'n', G_OPTION_FLAG_REVERSE,
 327                                 G_OPTION_ARG_NONE, &option_detach,
 328                                 "Don't fork daemon to background" },
 329         { "nodnsproxy", 'r', G_OPTION_FLAG_REVERSE,
 330                                 G_OPTION_ARG_NONE, &option_dnsproxy,
 331                                 "Don't enable DNS Proxy" },
 332         { "compat", 'c', 0, G_OPTION_ARG_NONE, &option_compat,
 333                                 "(obsolete)" },
 334         { "version", 'v', 0, G_OPTION_ARG_NONE, &option_version,
 335                                 "Show version information and exit" },
 336         { NULL },
 337 };
 338
 339 const char *connman_option_get_string(const char *key)
 340 {
 341         if (g_strcmp0(key, "wifi") == 0) {
 342                 if (option_wifi == NULL)
 343                         return "nl80211,wext";
 344                 else
 345                         return option_wifi;
 346         }
 347
 348         return NULL;
 349 }
 350
 351 connman_bool_t connman_setting_get_bool(const char *key)
 352 {
 353         if (g_str_equal(key, "BackgroundScanning") == TRUE)
 354                 return connman_settings.bg_scan;
 355
 356         return FALSE;
 357 }
 358
 359 char **connman_setting_get_string_list(const char *key)
 360 {
 361         if (g_str_equal(key, "FallbackTimeservers") == TRUE)
 362                 return connman_settings.pref_timeservers;
 363
 364         if (g_str_equal(key, "FallbackNameservers") == TRUE)
 365                 return connman_settings.fallback_nameservers;
 366
 367         return NULL;
 368 }
 369
 370 unsigned int *connman_setting_get_uint_list(const char *key)
 371 {
 372         if (g_str_equal(key, "DefaultAutoConnectTechnologies") == TRUE)
 373                 return connman_settings.auto_connect;
 374
 375         if (g_str_equal(key, "PreferredTechnologies") == TRUE)
 376                 return connman_settings.preferred_techs;
 377
 378         return NULL;
 379 }
 380
 381 int main(int argc, char *argv[])
 382 {
 383         GOptionContext *context;
 384         GError *error = NULL;
 385         DBusConnection *conn;
 386         DBusError err;
 387         GKeyFile *config;
 388         guint signal;
 389
 390 #ifdef HAVE_CAPNG
 391         /* Drop capabilities */
 392 #endif
 393
 394 #ifdef NEED_THREADS
 395         if (g_thread_supported() == FALSE)
 396                 g_thread_init(NULL);
 397 #endif
 398
 399         context = g_option_context_new(NULL);
 400         g_option_context_add_main_entries(context, options, NULL);
 401
 402         if (g_option_context_parse(context, &argc, &argv, &error) == FALSE) {
 403                 if (error != NULL) {
 404                         g_printerr("%s\n", error->message);
 405                         g_error_free(error);
 406                 } else
 407                         g_printerr("An unknown error occurred\n");
 408                 exit(1);
 409         }
 410
 411         g_option_context_free(context);
 412
 413         if (option_version == TRUE) {
 414                 printf("%s\n", VERSION);
 415                 exit(0);
 416         }
 417
 418         if (option_detach == TRUE) {
 419                 if (daemon(0, 0)) {
 420                         perror("Can't start daemon");
 421                         exit(1);
 422                 }
 423         }
 424
 425         if (mkdir(STATEDIR, S_IRUSR | S_IWUSR | S_IXUSR |
 426                                 S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) < 0) {
 427                 if (errno != EEXIST)
 428                         perror("Failed to create state directory");
 429         }
 430
 431         if (mkdir(STORAGEDIR, S_IRUSR | S_IWUSR | S_IXUSR |
 432                                 S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) < 0) {
 433                 if (errno != EEXIST)
 434                         perror("Failed to create storage directory");
 435         }
 436
 437         umask(0077);
 438
 439         main_loop = g_main_loop_new(NULL, FALSE);
 440
 441 #ifdef NEED_THREADS
 442         if (dbus_threads_init_default() == FALSE) {
 443                 fprintf(stderr, "Can't init usage of threads\n");
 444                 exit(1);
 445         }
 446 #endif
 447
 448         signal = setup_signalfd();
 449
 450         dbus_error_init(&err);
 451
 452         conn = g_dbus_setup_bus(DBUS_BUS_SYSTEM, CONNMAN_SERVICE, &err);
 453         if (conn == NULL) {
 454                 if (dbus_error_is_set(&err) == TRUE) {
 455                         fprintf(stderr, "%s\n", err.message);
 456                         dbus_error_free(&err);
 457                 } else
 458                         fprintf(stderr, "Can't register with system bus\n");
 459                 exit(1);
 460         }
 461
 462         g_dbus_set_disconnect_function(conn, disconnect_callback, NULL, NULL);
 463
 464         __connman_log_init(argv[0], option_debug, option_detach);
 465
 466         __connman_dbus_init(conn);
 467
 468         config = load_config(CONFIGDIR "/main.conf");
 469         parse_config(config);
 470         if (config != NULL)
 471                 g_key_file_free(config);
 472
 473         __connman_storage_migrate();
 474         __connman_technology_init();
 475         __connman_notifier_init();
 476         __connman_service_init();
 477         __connman_provider_init();
 478         __connman_network_init();
 479         __connman_device_init(option_device, option_nodevice);
 480
 481         __connman_agent_init();
 482         __connman_ippool_init();
 483         __connman_iptables_init();
 484         __connman_nat_init();
 485         __connman_tethering_init();
 486         __connman_counter_init();
 487         __connman_manager_init();
 488         __connman_config_init();
 489         __connman_stats_init();
 490         __connman_clock_init();
 491
 492         __connman_resolver_init(option_dnsproxy);
 493         __connman_ipconfig_init();
 494         __connman_rtnl_init();
 495         __connman_task_init();
 496         __connman_proxy_init();
 497         __connman_detect_init();
 498         __connman_session_init();
 499         __connman_timeserver_init();
 500         __connman_connection_init();
 501
 502         __connman_plugin_init(option_plugin, option_noplugin);
 503
 504         __connman_rtnl_start();
 505         __connman_dhcp_init();
 506         __connman_dhcpv6_init();
 507         __connman_wpad_init();
 508         __connman_wispr_init();
 509         __connman_rfkill_init();
 510
 511         g_free(option_device);
 512         g_free(option_plugin);
 513         g_free(option_nodevice);
 514         g_free(option_noplugin);
 515
 516         g_main_loop_run(main_loop);
 517
 518         g_source_remove(signal);
 519
 520         __connman_rfkill_cleanup();
 521         __connman_wispr_cleanup();
 522         __connman_wpad_cleanup();
 523         __connman_dhcpv6_cleanup();
 524         __connman_dhcp_cleanup();
 525         __connman_provider_cleanup();
 526         __connman_plugin_cleanup();
 527         __connman_connection_cleanup();
 528         __connman_timeserver_cleanup();
 529         __connman_session_cleanup();
 530         __connman_detect_cleanup();
 531         __connman_proxy_cleanup();
 532         __connman_task_cleanup();
 533         __connman_rtnl_cleanup();
 534         __connman_resolver_cleanup();
 535
 536         __connman_clock_cleanup();
 537         __connman_stats_cleanup();
 538         __connman_config_cleanup();
 539         __connman_manager_cleanup();
 540         __connman_counter_cleanup();
 541         __connman_agent_cleanup();
 542         __connman_tethering_cleanup();
 543         __connman_nat_cleanup();
 544         __connman_iptables_cleanup();
 545         __connman_ippool_cleanup();
 546         __connman_device_cleanup();
 547         __connman_network_cleanup();
 548         __connman_service_cleanup();
 549         __connman_ipconfig_cleanup();
 550         __connman_notifier_cleanup();
 551         __connman_technology_cleanup();
 552
 553         __connman_dbus_cleanup();
 554
 555         __connman_log_cleanup();
 556
 557         dbus_connection_unref(conn);
 558
 559         g_main_loop_unref(main_loop);
 560
 561         if (connman_settings.pref_timeservers != NULL)
 562                 g_strfreev(connman_settings.pref_timeservers);
 563
 564         g_free(connman_settings.auto_connect);
 565         g_free(connman_settings.preferred_techs);
 566         g_strfreev(connman_settings.fallback_nameservers);
 567
 568         g_free(option_debug);
 569
 570         return 0;
 571 }