tinc-vpn.org Git - tinc/blob - src/tincd.c

   1 /*
   2     tincd.c -- the main file for tincd
   3     Copyright (C) 1998-2005 Ivo Timmermans
   4                   2000-2007 Guus Sliepen <guus@tinc-vpn.org>
   5
   6     This program is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  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., 675 Mass Ave, Cambridge, MA 02139, USA.
  19
  20     $Id$
  21 */
  22
  23 #include "system.h"
  24
  25 /* Darwin (MacOS/X) needs the following definition... */
  26 #ifndef _P1003_1B_VISIBLE
  27 #define _P1003_1B_VISIBLE
  28 #endif
  29
  30 #ifdef HAVE_SYS_MMAN_H
  31 #include <sys/mman.h>
  32 #endif
  33
  34 #include LZO1X_H
  35
  36 #include <getopt.h>
  37
  38 #include "conf.h"
  39 #include "control.h"
  40 #include "crypto.h"
  41 #include "device.h"
  42 #include "logger.h"
  43 #include "net.h"
  44 #include "netutl.h"
  45 #include "process.h"
  46 #include "protocol.h"
  47 #include "utils.h"
  48 #include "xalloc.h"
  49
  50 /* The name this program was run with. */
  51 char *program_name = NULL;
  52
  53 /* If nonzero, display usage information and exit. */
  54 bool show_help = false;
  55
  56 /* If nonzero, print the version on standard output and exit.  */
  57 bool show_version = false;
  58
  59 /* If nonzero, use null ciphers and skip all key exchanges. */
  60 bool bypass_security = false;
  61
  62 /* If nonzero, disable swapping for this process. */
  63 bool do_mlock = false;
  64
  65 /* If nonzero, write log entries to a separate file. */
  66 bool use_logfile = false;
  67
  68 char *identname = NULL;                         /* program name for syslog */
  69 char *controlsocketname = NULL;                 /* control socket location */
  70 char *logfilename = NULL;                       /* log file location */
  71 char **g_argv;                                  /* a copy of the cmdline arguments */
  72
  73 static int status;
  74
  75 static struct option const long_options[] = {
  76         {"config", required_argument, NULL, 'c'},
  77         {"net", required_argument, NULL, 'n'},
  78         {"help", no_argument, NULL, 1},
  79         {"version", no_argument, NULL, 2},
  80         {"no-detach", no_argument, NULL, 'D'},
  81         {"debug", optional_argument, NULL, 'd'},
  82         {"bypass-security", no_argument, NULL, 3},
  83         {"mlock", no_argument, NULL, 'L'},
  84         {"logfile", optional_argument, NULL, 4},
  85         {"controlsocket", required_argument, NULL, 5},
  86         {NULL, 0, NULL, 0}
  87 };
  88
  89 #ifdef HAVE_MINGW
  90 static struct WSAData wsa_state;
  91 #endif
  92
  93 static void usage(bool status)
  94 {
  95         if(status)
  96                 fprintf(stderr, _("Try `%s --help\' for more information.\n"),
  97                                 program_name);
  98         else {
  99                 printf(_("Usage: %s [option]...\n\n"), program_name);
 100                 printf(_("  -c, --config=DIR                     Read configuration options from DIR.\n"
 101                                 "  -D, --no-detach               Don't fork and detach.\n"
 102                                 "  -d, --debug[=LEVEL]           Increase debug level or set it to LEVEL.\n"
 103                                 "  -n, --net=NETNAME             Connect to net NETNAME.\n"
 104                                 "  -L, --mlock                   Lock tinc into main memory.\n"
 105                                 "      --logfile[=FILENAME]      Write log entries to a logfile.\n"
 106                                 "      --controlsocket=FILENAME  Open control socket at FILENAME.\n"
 107                                 "      --help                    Display this help and exit.\n"
 108                                 "      --version                 Output version information and exit.\n\n"));
 109                 printf(_("Report bugs to tinc@tinc-vpn.org.\n"));
 110         }
 111 }
 112
 113 static bool parse_options(int argc, char **argv)
 114 {
 115         int r;
 116         int option_index = 0;
 117
 118         while((r = getopt_long(argc, argv, "c:DLd::n:", long_options, &option_index)) != EOF) {
 119                 switch (r) {
 120                         case 0:                         /* long option */
 121                                 break;
 122
 123                         case 'c':                               /* config file */
 124                                 confbase = xstrdup(optarg);
 125                                 break;
 126
 127                         case 'D':                               /* no detach */
 128                                 do_detach = false;
 129                                 break;
 130
 131                         case 'L':                               /* no detach */
 132                                 do_mlock = true;
 133                                 break;
 134
 135                         case 'd':                               /* inc debug level */
 136                                 if(optarg)
 137                                         debug_level = atoi(optarg);
 138                                 else
 139                                         debug_level++;
 140                                 break;
 141
 142                         case 'n':                               /* net name given */
 143                                 netname = xstrdup(optarg);
 144                                 break;
 145
 146                         case 1:                                 /* show help */
 147                                 show_help = true;
 148                                 break;
 149
 150                         case 2:                                 /* show version */
 151                                 show_version = true;
 152                                 break;
 153
 154                         case 3:                                 /* bypass security */
 155                                 bypass_security = true;
 156                                 break;
 157
 158                         case 4:                                 /* write log entries to a file */
 159                                 use_logfile = true;
 160                                 if(optarg)
 161                                         logfilename = xstrdup(optarg);
 162                                 break;
 163
 164                         case 5:                                 /* open control socket here */
 165                                 controlsocketname = xstrdup(optarg);
 166                                 break;
 167
 168                         case '?':
 169                                 usage(true);
 170                                 return false;
 171
 172                         default:
 173                                 break;
 174                 }
 175         }
 176
 177         return true;
 178 }
 179
 180 /*
 181   Set all files and paths according to netname
 182 */
 183 static void make_names(void)
 184 {
 185 #ifdef HAVE_MINGW
 186         HKEY key;
 187         char installdir[1024] = "";
 188         long len = sizeof(installdir);
 189 #endif
 190
 191         if(netname)
 192                 asprintf(&identname, "tinc.%s", netname);
 193         else
 194                 identname = xstrdup("tinc");
 195
 196 #ifdef HAVE_MINGW
 197         if(!RegOpenKeyEx(HKEY_LOCAL_MACHINE, "SOFTWARE\\tinc", 0, KEY_READ, &key)) {
 198                 if(!RegQueryValueEx(key, NULL, 0, 0, installdir, &len)) {
 199                         if(!logfilename)
 200                                 asprintf(&logfilename, "%s/log/%s.log", identname);
 201                         if(!confbase) {
 202                                 if(netname)
 203                                         asprintf(&confbase, "%s/%s", installdir, netname);
 204                                 else
 205                                         asprintf(&confbase, "%s", installdir);
 206                         }
 207                 }
 208                 RegCloseKey(key);
 209                 if(*installdir)
 210                         return;
 211         }
 212 #endif
 213
 214         if(!controlsocketname)
 215                 asprintf(&controlsocketname, LOCALSTATEDIR "/run/%s.control", identname);
 216
 217         if(!logfilename)
 218                 asprintf(&logfilename, LOCALSTATEDIR "/log/%s.log", identname);
 219
 220         if(netname) {
 221                 if(!confbase)
 222                         asprintf(&confbase, CONFDIR "/tinc/%s", netname);
 223                 else
 224                         logger(LOG_INFO, _("Both netname and configuration directory given, using the latter..."));
 225         } else {
 226                 if(!confbase)
 227                         asprintf(&confbase, CONFDIR "/tinc");
 228         }
 229 }
 230
 231 int main(int argc, char **argv)
 232 {
 233         program_name = argv[0];
 234
 235         setlocale(LC_ALL, "");
 236         bindtextdomain(PACKAGE, LOCALEDIR);
 237         textdomain(PACKAGE);
 238
 239         if(!parse_options(argc, argv))
 240                 return 1;
 241
 242         make_names();
 243
 244         if(show_version) {
 245                 printf(_("%s version %s (built %s %s, protocol %d)\n"), PACKAGE,
 246                            VERSION, __DATE__, __TIME__, PROT_CURRENT);
 247                 printf(_("Copyright (C) 1998-2007 Ivo Timmermans, Guus Sliepen and others.\n"
 248                                 "See the AUTHORS file for a complete list.\n\n"
 249                                 "tinc comes with ABSOLUTELY NO WARRANTY.  This is free software,\n"
 250                                 "and you are welcome to redistribute it under certain conditions;\n"
 251                                 "see the file COPYING for details.\n"));
 252
 253                 return 0;
 254         }
 255
 256         if(show_help) {
 257                 usage(false);
 258                 return 0;
 259         }
 260
 261         openlogger("tinc", use_logfile?LOGMODE_FILE:LOGMODE_STDERR);
 262
 263         if(!event_init()) {
 264                 logger(LOG_ERR, _("Error initializing libevent!"));
 265                 return 1;
 266         }
 267
 268         if(!init_control())
 269                 return 1;
 270
 271         /* Lock all pages into memory if requested */
 272
 273         if(do_mlock)
 274 #ifdef HAVE_MLOCKALL
 275                 if(mlockall(MCL_CURRENT | MCL_FUTURE)) {
 276                         logger(LOG_ERR, _("System call `%s' failed: %s"), "mlockall",
 277                                    strerror(errno));
 278 #else
 279         {
 280                 logger(LOG_ERR, _("mlockall() not supported on this platform!"));
 281 #endif
 282                 return -1;
 283         }
 284
 285         g_argv = argv;
 286
 287         init_configuration(&config_tree);
 288
 289         /* Slllluuuuuuurrrrp! */
 290
 291         srand(time(NULL));
 292         crypto_init();
 293
 294         if(!read_server_config())
 295                 return 1;
 296
 297         if(lzo_init() != LZO_E_OK) {
 298                 logger(LOG_ERR, _("Error initializing LZO compressor!"));
 299                 return 1;
 300         }
 301
 302 #ifdef HAVE_MINGW
 303         if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
 304                 logger(LOG_ERR, _("System call `%s' failed: %s"), "WSAStartup", winerror(GetLastError()));
 305                 return 1;
 306         }
 307
 308         if(!do_detach || !init_service())
 309                 return main2(argc, argv);
 310         else
 311                 return 1;
 312 }
 313
 314 int main2(int argc, char **argv)
 315 {
 316 #endif
 317
 318         if(!detach())
 319                 return 1;
 320
 321
 322         /* Setup sockets and open device. */
 323
 324         if(!setup_network_connections())
 325                 goto end;
 326
 327         /* Start main loop. It only exits when tinc is killed. */
 328
 329         status = main_loop();
 330
 331         /* Shutdown properly. */
 332
 333         close_network_connections();
 334
 335         ifdebug(CONNECTIONS)
 336                 dump_device_stats();
 337
 338 end:
 339         logger(LOG_NOTICE, _("Terminating"));
 340
 341 #ifndef HAVE_MINGW
 342         exit_control();
 343 #endif
 344
 345         crypto_exit();
 346
 347         return status;
 348 }