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