vpn/main.c

   1 /*
   2  *
   3  *  ConnMan VPN daemon
   4  *
   5  *  Copyright (C) 2012-2013  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 #include "../src/connman.h"
  41 #include "vpn.h"
  42
  43 #include "connman/vpn-dbus.h"
  44
  45 #define CONFIGMAINFILE CONFIGDIR "/connman-vpn.conf"
  46
  47 #define DEFAULT_INPUT_REQUEST_TIMEOUT 300 * 1000
  48 #define DEFAULT_BROWSER_LAUNCH_TIMEOUT 300 * 1000
  49
  50 static GMainLoop *main_loop = NULL;
  51
  52 static unsigned int __terminated = 0;
  53
  54 static struct {
  55         unsigned int timeout_inputreq;
  56         unsigned int timeout_browserlaunch;
  57 } connman_vpn_settings  = {
  58         .timeout_inputreq = DEFAULT_INPUT_REQUEST_TIMEOUT,
  59         .timeout_browserlaunch = DEFAULT_BROWSER_LAUNCH_TIMEOUT,
  60 };
  61
  62 static GKeyFile *load_config(const char *file)
  63 {
  64         GError *err = NULL;
  65         GKeyFile *keyfile;
  66
  67         keyfile = g_key_file_new();
  68
  69         g_key_file_set_list_separator(keyfile, ',');
  70
  71         if (!g_key_file_load_from_file(keyfile, file, 0, &err)) {
  72                 if (err->code != G_FILE_ERROR_NOENT) {
  73                         connman_error("Parsing %s failed: %s", file,
  74                                                                 err->message);
  75                 }
  76
  77                 g_error_free(err);
  78                 g_key_file_free(keyfile);
  79                 return NULL;
  80         }
  81
  82         return keyfile;
  83 }
  84
  85 static void parse_config(GKeyFile *config, const char *file)
  86 {
  87         GError *error = NULL;
  88         int timeout;
  89
  90         if (!config)
  91                 return;
  92
  93         DBG("parsing %s", file);
  94
  95         timeout = g_key_file_get_integer(config, "General",
  96                         "InputRequestTimeout", &error);
  97         if (!error && timeout >= 0)
  98                 connman_vpn_settings.timeout_inputreq = timeout * 1000;
  99
 100         g_clear_error(&error);
 101 }
 102
 103 static int config_init(const char *file)
 104 {
 105         GKeyFile *config;
 106
 107         config = load_config(file);
 108         parse_config(config, file);
 109         if (config)
 110                 g_key_file_free(config);
 111
 112         return 0;
 113 }
 114
 115 static gboolean signal_handler(GIOChannel *channel, GIOCondition cond,
 116                                                         gpointer user_data)
 117 {
 118         struct signalfd_siginfo si;
 119         ssize_t result;
 120         int fd;
 121
 122         if (cond & (G_IO_NVAL | G_IO_ERR | G_IO_HUP))
 123                 return FALSE;
 124
 125         fd = g_io_channel_unix_get_fd(channel);
 126
 127         result = read(fd, &si, sizeof(si));
 128         if (result != sizeof(si))
 129                 return FALSE;
 130
 131         switch (si.ssi_signo) {
 132         case SIGINT:
 133         case SIGTERM:
 134                 if (__terminated == 0) {
 135                         connman_info("Terminating");
 136                         g_main_loop_quit(main_loop);
 137                 }
 138
 139                 __terminated = 1;
 140                 break;
 141         }
 142
 143         return TRUE;
 144 }
 145
 146 static guint setup_signalfd(void)
 147 {
 148         GIOChannel *channel;
 149         guint source;
 150         sigset_t mask;
 151         int fd;
 152
 153         sigemptyset(&mask);
 154         sigaddset(&mask, SIGINT);
 155         sigaddset(&mask, SIGTERM);
 156
 157         if (sigprocmask(SIG_BLOCK, &mask, NULL) < 0) {
 158                 perror("Failed to set signal mask");
 159                 return 0;
 160         }
 161
 162         fd = signalfd(-1, &mask, 0);
 163         if (fd < 0) {
 164                 perror("Failed to create signal descriptor");
 165                 return 0;
 166         }
 167
 168         channel = g_io_channel_unix_new(fd);
 169
 170         g_io_channel_set_close_on_unref(channel, TRUE);
 171         g_io_channel_set_encoding(channel, NULL, NULL);
 172         g_io_channel_set_buffered(channel, FALSE);
 173
 174         source = g_io_add_watch(channel,
 175                                 G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_NVAL,
 176                                 signal_handler, NULL);
 177
 178         g_io_channel_unref(channel);
 179
 180         return source;
 181 }
 182
 183 static void disconnect_callback(DBusConnection *conn, void *user_data)
 184 {
 185         connman_error("D-Bus disconnect");
 186
 187         g_main_loop_quit(main_loop);
 188 }
 189
 190 static gchar *option_config = NULL;
 191 static gchar *option_debug = NULL;
 192 static gchar *option_plugin = NULL;
 193 static gchar *option_noplugin = NULL;
 194 static bool option_detach = true;
 195 static bool option_version = false;
 196 static bool option_routes = false;
 197
 198 static bool parse_debug(const char *key, const char *value,
 199                                         gpointer user_data, GError **error)
 200 {
 201         if (value)
 202                 option_debug = g_strdup(value);
 203         else
 204                 option_debug = g_strdup("*");
 205
 206         return true;
 207 }
 208
 209 static GOptionEntry options[] = {
 210         { "config", 'c', 0, G_OPTION_ARG_STRING, &option_config,
 211                                 "Load the specified configuration file "
 212                                 "instead of " CONFIGMAINFILE, "FILE" },
 213         { "debug", 'd', G_OPTION_FLAG_OPTIONAL_ARG,
 214                                 G_OPTION_ARG_CALLBACK, parse_debug,
 215                                 "Specify debug options to enable", "DEBUG" },
 216         { "plugin", 'p', 0, G_OPTION_ARG_STRING, &option_plugin,
 217                                 "Specify plugins to load", "NAME,..." },
 218         { "noplugin", 'P', 0, G_OPTION_ARG_STRING, &option_noplugin,
 219                                 "Specify plugins not to load", "NAME,..." },
 220         { "nodaemon", 'n', G_OPTION_FLAG_REVERSE,
 221                                 G_OPTION_ARG_NONE, &option_detach,
 222                                 "Don't fork daemon to background" },
 223         { "routes", 'r', 0, G_OPTION_ARG_NONE, &option_routes,
 224                                 "Create/delete VPN routes" },
 225         { "version", 'v', 0, G_OPTION_ARG_NONE, &option_version,
 226                                 "Show version information and exit" },
 227         { NULL },
 228 };
 229
 230 bool connman_setting_get_bool(const char *key)
 231 {
 232         return false;
 233 }
 234
 235 char **connman_setting_get_string_list(const char *key)
 236 {
 237         return NULL;
 238 }
 239
 240 unsigned int *connman_setting_get_uint_list(const char *key)
 241 {
 242         return NULL;
 243 }
 244
 245 /*
 246  * This function will be called from generic src/agent.c code so we have
 247  * to use connman_ prefix instead of vpn_ one.
 248  */
 249 unsigned int connman_timeout_input_request(void)
 250 {
 251         return connman_vpn_settings.timeout_inputreq;
 252 }
 253
 254 unsigned int connman_timeout_browser_launch(void)
 255 {
 256         return connman_vpn_settings.timeout_browserlaunch;
 257 }
 258
 259 int main(int argc, char *argv[])
 260 {
 261         GOptionContext *context;
 262         GError *error = NULL;
 263         DBusConnection *conn;
 264         DBusError err;
 265         guint signal;
 266
 267         context = g_option_context_new(NULL);
 268         g_option_context_add_main_entries(context, options, NULL);
 269
 270         if (!g_option_context_parse(context, &argc, &argv, &error)) {
 271                 if (error) {
 272                         g_printerr("%s\n", error->message);
 273                         g_error_free(error);
 274                 } else
 275                         g_printerr("An unknown error occurred\n");
 276                 exit(1);
 277         }
 278
 279         g_option_context_free(context);
 280
 281         if (option_version) {
 282                 printf("%s\n", VERSION);
 283                 exit(0);
 284         }
 285
 286         if (option_detach) {
 287                 if (daemon(0, 0)) {
 288                         perror("Can't start daemon");
 289                         exit(1);
 290                 }
 291         }
 292
 293         if (mkdir(VPN_STATEDIR, S_IRUSR | S_IWUSR | S_IXUSR |
 294                                 S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) < 0) {
 295                 if (errno != EEXIST)
 296                         perror("Failed to create state directory");
 297         }
 298
 299         /*
 300          * At some point the VPN stuff is migrated into VPN_STORAGEDIR
 301          * and this mkdir() call can be removed.
 302          */
 303         if (mkdir(STORAGEDIR, S_IRUSR | S_IWUSR | S_IXUSR |
 304                                 S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) < 0) {
 305                 if (errno != EEXIST)
 306                         perror("Failed to create storage directory");
 307         }
 308
 309         if (mkdir(VPN_STORAGEDIR, S_IRUSR | S_IWUSR | S_IXUSR |
 310                                 S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) < 0) {
 311                 if (errno != EEXIST)
 312                         perror("Failed to create VPN storage directory");
 313         }
 314
 315         umask(0077);
 316
 317         main_loop = g_main_loop_new(NULL, FALSE);
 318
 319         signal = setup_signalfd();
 320
 321         dbus_error_init(&err);
 322
 323         conn = g_dbus_setup_bus(DBUS_BUS_SYSTEM, VPN_SERVICE, &err);
 324         if (!conn) {
 325                 if (dbus_error_is_set(&err)) {
 326                         fprintf(stderr, "%s\n", err.message);
 327                         dbus_error_free(&err);
 328                 } else
 329                         fprintf(stderr, "Can't register with system bus\n");
 330                 exit(1);
 331         }
 332
 333         g_dbus_set_disconnect_function(conn, disconnect_callback, NULL, NULL);
 334
 335         __connman_log_init(argv[0], option_debug, option_detach, false,
 336                         "Connection Manager VPN daemon", VERSION);
 337         __connman_dbus_init(conn);
 338
 339         if (!option_config)
 340                 config_init(CONFIGMAINFILE);
 341         else
 342                 config_init(option_config);
 343
 344         __connman_inotify_init();
 345         __connman_agent_init();
 346         __vpn_provider_init(option_routes);
 347         __vpn_manager_init();
 348         __vpn_ipconfig_init();
 349         __vpn_rtnl_init();
 350         __connman_task_init();
 351         __connman_plugin_init(option_plugin, option_noplugin);
 352         __vpn_config_init();
 353
 354         __vpn_rtnl_start();
 355
 356         g_free(option_plugin);
 357         g_free(option_noplugin);
 358
 359         g_main_loop_run(main_loop);
 360
 361         g_source_remove(signal);
 362
 363         __vpn_config_cleanup();
 364         __connman_plugin_cleanup();
 365         __connman_task_cleanup();
 366         __vpn_rtnl_cleanup();
 367         __vpn_ipconfig_cleanup();
 368         __vpn_manager_cleanup();
 369         __vpn_provider_cleanup();
 370         __connman_agent_cleanup();
 371         __connman_inotify_cleanup();
 372         __connman_dbus_cleanup();
 373         __connman_log_cleanup(false);
 374
 375         dbus_connection_unref(conn);
 376
 377         g_main_loop_unref(main_loop);
 378
 379         g_free(option_debug);
 380
 381         return 0;
 382 }