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 <openssl/rand.h>
  35 #include <openssl/rsa.h>
  36 #include <openssl/pem.h>
  37 #include <openssl/evp.h>
  38 #include <openssl/engine.h>
  39
  40 #include LZO1X_H
  41
  42 #include <getopt.h>
  43
  44 #include "conf.h"
  45 #include "control.h"
  46 #include "device.h"
  47 #include "logger.h"
  48 #include "net.h"
  49 #include "netutl.h"
  50 #include "process.h"
  51 #include "protocol.h"
  52 #include "utils.h"
  53 #include "xalloc.h"
  54
  55 /* The name this program was run with. */
  56 char *program_name = NULL;
  57
  58 /* If nonzero, display usage information and exit. */
  59 bool show_help = false;
  60
  61 /* If nonzero, print the version on standard output and exit.  */
  62 bool show_version = false;
  63
  64 /* If nonzero, use null ciphers and skip all key exchanges. */
  65 bool bypass_security = false;
  66
  67 /* If nonzero, disable swapping for this process. */
  68 bool do_mlock = false;
  69
  70 /* If nonzero, write log entries to a separate file. */
  71 bool use_logfile = false;
  72
  73 char *identname = NULL;                         /* program name for syslog */
  74 char *controlsocketname = NULL;                 /* control socket location */
  75 char *logfilename = NULL;                       /* log file location */
  76 char **g_argv;                                  /* a copy of the cmdline arguments */
  77
  78 static int status;
  79
  80 static struct option const long_options[] = {
  81         {"config", required_argument, NULL, 'c'},
  82         {"net", required_argument, NULL, 'n'},
  83         {"help", no_argument, NULL, 1},
  84         {"version", no_argument, NULL, 2},
  85         {"no-detach", no_argument, NULL, 'D'},
  86         {"debug", optional_argument, NULL, 'd'},
  87         {"bypass-security", no_argument, NULL, 3},
  88         {"mlock", no_argument, NULL, 'L'},
  89         {"logfile", optional_argument, NULL, 4},
  90         {"controlsocket", required_argument, NULL, 5},
  91         {NULL, 0, NULL, 0}
  92 };
  93
  94 #ifdef HAVE_MINGW
  95 static struct WSAData wsa_state;
  96 #endif
  97
  98 static void usage(bool status)
  99 {
 100         if(status)
 101                 fprintf(stderr, _("Try `%s --help\' for more information.\n"),
 102                                 program_name);
 103         else {
 104                 printf(_("Usage: %s [option]...\n\n"), program_name);
 105                 printf(_(       "  -c, --config=DIR              Read configuration options from DIR.\n"
 106                                 "  -D, --no-detach               Don't fork and detach.\n"
 107                                 "  -d, --debug[=LEVEL]           Increase debug level or set it to LEVEL.\n"
 108                                 "  -n, --net=NETNAME             Connect to net NETNAME.\n"
 109                                 "  -L, --mlock                   Lock tinc into main memory.\n"
 110                                 "      --logfile[=FILENAME]      Write log entries to a logfile.\n"
 111                                 "      --controlsocket=FILENAME  Open control socket at FILENAME.\n"
 112                                 "      --bypass-security         Disables meta protocol security, for debugging.\n"
 113                                 "      --help                    Display this help and exit.\n"
 114                                 "      --version                 Output version information and exit.\n\n"));
 115                 printf(_("Report bugs to tinc@tinc-vpn.org.\n"));
 116         }
 117 }
 118
 119 static bool parse_options(int argc, char **argv)
 120 {
 121         int r;
 122         int option_index = 0;
 123
 124         while((r = getopt_long(argc, argv, "c:DLd::n:", long_options, &option_index)) != EOF) {
 125                 switch (r) {
 126                         case 0:                         /* long option */
 127                                 break;
 128
 129                         case 'c':                               /* config file */
 130                                 confbase = xstrdup(optarg);
 131                                 break;
 132
 133                         case 'D':                               /* no detach */
 134                                 do_detach = false;
 135                                 break;
 136
 137                         case 'L':                               /* no detach */
 138                                 do_mlock = true;
 139                                 break;
 140
 141                         case 'd':                               /* inc debug level */
 142                                 if(optarg)
 143                                         debug_level = atoi(optarg);
 144                                 else
 145                                         debug_level++;
 146                                 break;
 147
 148                         case 'n':                               /* net name given */
 149                                 netname = xstrdup(optarg);
 150                                 break;
 151
 152                         case 1:                                 /* show help */
 153                                 show_help = true;
 154                                 break;
 155
 156                         case 2:                                 /* show version */
 157                                 show_version = true;
 158                                 break;
 159
 160                         case 3:                                 /* bypass security */
 161                                 bypass_security = true;
 162                                 break;
 163
 164                         case 4:                                 /* write log entries to a file */
 165                                 use_logfile = true;
 166                                 if(optarg)
 167                                         logfilename = xstrdup(optarg);
 168                                 break;
 169
 170                         case 5:                                 /* open control socket here */
 171                                 controlsocketname = xstrdup(optarg);
 172                                 break;
 173
 174                         case '?':
 175                                 usage(true);
 176                                 return false;
 177
 178                         default:
 179                                 break;
 180                 }
 181         }
 182
 183         return true;
 184 }
 185
 186 /*
 187   Set all files and paths according to netname
 188 */
 189 static void make_names(void)
 190 {
 191 #ifdef HAVE_MINGW
 192         HKEY key;
 193         char installdir[1024] = "";
 194         long len = sizeof(installdir);
 195 #endif
 196
 197         if(netname)
 198                 asprintf(&identname, "tinc.%s", netname);
 199         else
 200                 identname = xstrdup("tinc");
 201
 202 #ifdef HAVE_MINGW
 203         if(!RegOpenKeyEx(HKEY_LOCAL_MACHINE, "SOFTWARE\\tinc", 0, KEY_READ, &key)) {
 204                 if(!RegQueryValueEx(key, NULL, 0, 0, installdir, &len)) {
 205                         if(!logfilename)
 206                                 asprintf(&logfilename, "%s/log/%s.log", identname);
 207                         if(!confbase) {
 208                                 if(netname)
 209                                         asprintf(&confbase, "%s/%s", installdir, netname);
 210                                 else
 211                                         asprintf(&confbase, "%s", installdir);
 212                         }
 213                 }
 214                 RegCloseKey(key);
 215                 if(*installdir)
 216                         return;
 217         }
 218 #endif
 219
 220         if(!controlsocketname)
 221                 asprintf(&controlsocketname, LOCALSTATEDIR "/run/%s.control", identname);
 222
 223         if(!logfilename)
 224                 asprintf(&logfilename, LOCALSTATEDIR "/log/%s.log", identname);
 225
 226         if(netname) {
 227                 if(!confbase)
 228                         asprintf(&confbase, CONFDIR "/tinc/%s", netname);
 229                 else
 230                         logger(LOG_INFO, _("Both netname and configuration directory given, using the latter..."));
 231         } else {
 232                 if(!confbase)
 233                         asprintf(&confbase, CONFDIR "/tinc");
 234         }
 235 }
 236
 237 int main(int argc, char **argv)
 238 {
 239         program_name = argv[0];
 240
 241         setlocale(LC_ALL, "");
 242         bindtextdomain(PACKAGE, LOCALEDIR);
 243         textdomain(PACKAGE);
 244
 245         if(!parse_options(argc, argv))
 246                 return 1;
 247
 248         make_names();
 249
 250         if(show_version) {
 251                 printf(_("%s version %s (built %s %s, protocol %d)\n"), PACKAGE,
 252                            VERSION, __DATE__, __TIME__, PROT_CURRENT);
 253                 printf(_("Copyright (C) 1998-2007 Ivo Timmermans, Guus Sliepen and others.\n"
 254                                 "See the AUTHORS file for a complete list.\n\n"
 255                                 "tinc comes with ABSOLUTELY NO WARRANTY.  This is free software,\n"
 256                                 "and you are welcome to redistribute it under certain conditions;\n"
 257                                 "see the file COPYING for details.\n"));
 258
 259                 return 0;
 260         }
 261
 262         if(show_help) {
 263                 usage(false);
 264                 return 0;
 265         }
 266
 267         openlogger("tinc", use_logfile?LOGMODE_FILE:LOGMODE_STDERR);
 268
 269         if(!event_init()) {
 270                 logger(LOG_ERR, _("Error initializing libevent!"));
 271                 return 1;
 272         }
 273
 274         if(!init_control())
 275                 return 1;
 276
 277         /* Lock all pages into memory if requested */
 278
 279         if(do_mlock)
 280 #ifdef HAVE_MLOCKALL
 281                 if(mlockall(MCL_CURRENT | MCL_FUTURE)) {
 282                         logger(LOG_ERR, _("System call `%s' failed: %s"), "mlockall",
 283                                    strerror(errno));
 284 #else
 285         {
 286                 logger(LOG_ERR, _("mlockall() not supported on this platform!"));
 287 #endif
 288                 return -1;
 289         }
 290
 291         g_argv = argv;
 292
 293         init_configuration(&config_tree);
 294
 295         /* Slllluuuuuuurrrrp! */
 296
 297         srand(time(NULL));
 298         RAND_load_file("/dev/urandom", 1024);
 299
 300         ENGINE_load_builtin_engines();
 301         ENGINE_register_all_complete();
 302
 303         OpenSSL_add_all_algorithms();
 304
 305         if(!read_server_config())
 306                 return 1;
 307
 308         if(lzo_init() != LZO_E_OK) {
 309                 logger(LOG_ERR, _("Error initializing LZO compressor!"));
 310                 return 1;
 311         }
 312
 313 #ifdef HAVE_MINGW
 314         if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
 315                 logger(LOG_ERR, _("System call `%s' failed: %s"), "WSAStartup", winerror(GetLastError()));
 316                 return 1;
 317         }
 318
 319         if(!do_detach || !init_service())
 320                 return main2(argc, argv);
 321         else
 322                 return 1;
 323 }
 324
 325 int main2(int argc, char **argv)
 326 {
 327 #endif
 328
 329         if(!detach())
 330                 return 1;
 331
 332
 333         /* Setup sockets and open device. */
 334
 335         if(!setup_network_connections())
 336                 goto end;
 337
 338         /* Start main loop. It only exits when tinc is killed. */
 339
 340         status = main_loop();
 341
 342         /* Shutdown properly. */
 343
 344         close_network_connections();
 345
 346         ifdebug(CONNECTIONS)
 347                 dump_device_stats();
 348
 349 end:
 350         logger(LOG_NOTICE, _("Terminating"));
 351
 352 #ifndef HAVE_MINGW
 353         exit_control();
 354 #endif
 355
 356         EVP_cleanup();
 357
 358         return status;
 359 }