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 /*
 164  * This function will be called from generic src/agent.c code so we have
 165  * to use connman_ prefix instead of vpn_ one.
 166  */
 167 unsigned int connman_timeout_input_request(void)
 168 {
 169         return __vpn_settings_get_timeout_inputreq();
 170 }
 171
 172 int main(int argc, char *argv[])
 173 {
 174         GOptionContext *context;
 175         GError *error = NULL;
 176         DBusConnection *conn;
 177         DBusError err;
 178         guint signal;
 179
 180         context = g_option_context_new(NULL);
 181         g_option_context_add_main_entries(context, options, NULL);
 182
 183         if (!g_option_context_parse(context, &argc, &argv, &error)) {
 184                 if (error) {
 185                         g_printerr("%s\n", error->message);
 186                         g_error_free(error);
 187                 } else
 188                         g_printerr("An unknown error occurred\n");
 189                 exit(1);
 190         }
 191
 192         g_option_context_free(context);
 193
 194         if (option_version) {
 195                 printf("%s\n", VERSION);
 196                 exit(0);
 197         }
 198
 199         if (option_detach) {
 200                 if (daemon(0, 0)) {
 201                         perror("Can't start daemon");
 202                         exit(1);
 203                 }
 204         }
 205
 206         if (mkdir(VPN_STATEDIR, S_IRUSR | S_IWUSR | S_IXUSR |
 207                                 S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) < 0) {
 208                 if (errno != EEXIST)
 209                         perror("Failed to create state directory");
 210         }
 211
 212         /*
 213          * At some point the VPN stuff is migrated into VPN_STORAGEDIR
 214          * and this mkdir() call can be removed.
 215          */
 216         if (mkdir(STORAGEDIR, S_IRUSR | S_IWUSR | S_IXUSR |
 217                                 S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) < 0) {
 218                 if (errno != EEXIST)
 219                         perror("Failed to create storage directory");
 220         }
 221
 222         if (mkdir(VPN_STORAGEDIR, S_IRUSR | S_IWUSR | S_IXUSR |
 223                                 S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) < 0) {
 224                 if (errno != EEXIST)
 225                         perror("Failed to create VPN storage directory");
 226         }
 227
 228         umask(0077);
 229
 230         main_loop = g_main_loop_new(NULL, FALSE);
 231
 232         signal = setup_signalfd();
 233
 234         dbus_error_init(&err);
 235
 236         conn = g_dbus_setup_bus(DBUS_BUS_SYSTEM, VPN_SERVICE, &err);
 237         if (!conn) {
 238                 if (dbus_error_is_set(&err)) {
 239                         fprintf(stderr, "%s\n", err.message);
 240                         dbus_error_free(&err);
 241                 } else
 242                         fprintf(stderr, "Can't register with system bus\n");
 243                 exit(1);
 244         }
 245
 246         g_dbus_set_disconnect_function(conn, disconnect_callback, NULL, NULL);
 247
 248         __connman_log_init(argv[0], option_debug, option_detach, false,
 249                         "Connection Manager VPN daemon", VERSION);
 250         __connman_dbus_init(conn);
 251
 252         if (!option_config)
 253                 __vpn_settings_init(CONFIGMAINFILE);
 254         else
 255                 __vpn_settings_init(option_config);
 256
 257         __connman_inotify_init();
 258         __connman_agent_init();
 259         __vpn_provider_init();
 260         __vpn_manager_init();
 261         __vpn_ipconfig_init();
 262         __vpn_rtnl_init();
 263         __connman_task_init();
 264         __connman_plugin_init(option_plugin, option_noplugin);
 265         __vpn_config_init();
 266
 267         __vpn_rtnl_start();
 268
 269         g_free(option_plugin);
 270         g_free(option_noplugin);
 271
 272         g_main_loop_run(main_loop);
 273
 274         g_source_remove(signal);
 275
 276         __vpn_config_cleanup();
 277         __connman_plugin_cleanup();
 278         __connman_task_cleanup();
 279         __vpn_rtnl_cleanup();
 280         __vpn_ipconfig_cleanup();
 281         __vpn_manager_cleanup();
 282         __vpn_provider_cleanup();
 283         __connman_agent_cleanup();
 284         __connman_inotify_cleanup();
 285         __connman_dbus_cleanup();
 286         __connman_log_cleanup(false);
 287         __vpn_settings_cleanup();
 288
 289         dbus_connection_unref(conn);
 290
 291         g_main_loop_unref(main_loop);
 292
 293         g_free(option_debug);
 294
 295         return 0;
 296 }