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