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                                 "      --help                    Display this help and exit.\n"
 113                                 "      --version                 Output version information and exit.\n\n"));
 114                 printf(_("Report bugs to tinc@tinc-vpn.org.\n"));
 115         }
 116 }
 117
 118 static bool parse_options(int argc, char **argv)
 119 {
 120         int r;
 121         int option_index = 0;
 122
 123         while((r = getopt_long(argc, argv, "c:DLd::n:", long_options, &option_index)) != EOF) {
 124                 switch (r) {
 125                         case 0:                         /* long option */
 126                                 break;
 127
 128                         case 'c':                               /* config file */
 129                                 confbase = xstrdup(optarg);
 130                                 break;
 131
 132                         case 'D':                               /* no detach */
 133                                 do_detach = false;
 134                                 break;
 135
 136                         case 'L':                               /* no detach */
 137                                 do_mlock = true;
 138                                 break;
 139
 140                         case 'd':                               /* inc debug level */
 141                                 if(optarg)
 142                                         debug_level = atoi(optarg);
 143                                 else
 144                                         debug_level++;
 145                                 break;
 146
 147                         case 'n':                               /* net name given */
 148                                 netname = xstrdup(optarg);
 149                                 break;
 150
 151                         case 1:                                 /* show help */
 152                                 show_help = true;
 153                                 break;
 154
 155                         case 2:                                 /* show version */
 156                                 show_version = true;
 157                                 break;
 158
 159                         case 3:                                 /* bypass security */
 160                                 bypass_security = true;
 161                                 break;
 162
 163                         case 4:                                 /* write log entries to a file */
 164                                 use_logfile = true;
 165                                 if(optarg)
 166                                         logfilename = xstrdup(optarg);
 167                                 break;
 168
 169                         case 5:                                 /* open control socket here */
 170                                 controlsocketname = xstrdup(optarg);
 171                                 break;
 172
 173                         case '?':
 174                                 usage(true);
 175                                 return false;
 176
 177                         default:
 178                                 break;
 179                 }
 180         }
 181
 182         return true;
 183 }
 184
 185 /*
 186   Set all files and paths according to netname
 187 */
 188 static void make_names(void)
 189 {
 190 #ifdef HAVE_MINGW
 191         HKEY key;
 192         char installdir[1024] = "";
 193         long len = sizeof(installdir);
 194 #endif
 195
 196         if(netname)
 197                 asprintf(&identname, "tinc.%s", netname);
 198         else
 199                 identname = xstrdup("tinc");
 200
 201 #ifdef HAVE_MINGW
 202         if(!RegOpenKeyEx(HKEY_LOCAL_MACHINE, "SOFTWARE\\tinc", 0, KEY_READ, &key)) {
 203                 if(!RegQueryValueEx(key, NULL, 0, 0, installdir, &len)) {
 204                         if(!logfilename)
 205                                 asprintf(&logfilename, "%s/log/%s.log", identname);
 206                         if(!confbase) {
 207                                 if(netname)
 208                                         asprintf(&confbase, "%s/%s", installdir, netname);
 209                                 else
 210                                         asprintf(&confbase, "%s", installdir);
 211                         }
 212                 }
 213                 RegCloseKey(key);
 214                 if(*installdir)
 215                         return;
 216         }
 217 #endif
 218
 219         if(!controlsocketname)
 220                 asprintf(&controlsocketname, LOCALSTATEDIR "/run/%s.control", identname);
 221
 222         if(!logfilename)
 223                 asprintf(&logfilename, LOCALSTATEDIR "/log/%s.log", identname);
 224
 225         if(netname) {
 226                 if(!confbase)
 227                         asprintf(&confbase, CONFDIR "/tinc/%s", netname);
 228                 else
 229                         logger(LOG_INFO, _("Both netname and configuration directory given, using the latter..."));
 230         } else {
 231                 if(!confbase)
 232                         asprintf(&confbase, CONFDIR "/tinc");
 233         }
 234 }
 235
 236 int main(int argc, char **argv)
 237 {
 238         program_name = argv[0];
 239
 240         setlocale(LC_ALL, "");
 241         bindtextdomain(PACKAGE, LOCALEDIR);
 242         textdomain(PACKAGE);
 243
 244         if(!parse_options(argc, argv))
 245                 return 1;
 246
 247         make_names();
 248
 249         if(show_version) {
 250                 printf(_("%s version %s (built %s %s, protocol %d)\n"), PACKAGE,
 251                            VERSION, __DATE__, __TIME__, PROT_CURRENT);
 252                 printf(_("Copyright (C) 1998-2007 Ivo Timmermans, Guus Sliepen and others.\n"
 253                                 "See the AUTHORS file for a complete list.\n\n"
 254                                 "tinc comes with ABSOLUTELY NO WARRANTY.  This is free software,\n"
 255                                 "and you are welcome to redistribute it under certain conditions;\n"
 256                                 "see the file COPYING for details.\n"));
 257
 258                 return 0;
 259         }
 260
 261         if(show_help) {
 262                 usage(false);
 263                 return 0;
 264         }
 265
 266         openlogger("tinc", use_logfile?LOGMODE_FILE:LOGMODE_STDERR);
 267
 268         if(!event_init()) {
 269                 logger(LOG_ERR, _("Error initializing libevent!"));
 270                 return 1;
 271         }
 272
 273         if(!init_control())
 274                 return 1;
 275
 276         /* Lock all pages into memory if requested */
 277
 278         if(do_mlock)
 279 #ifdef HAVE_MLOCKALL
 280                 if(mlockall(MCL_CURRENT | MCL_FUTURE)) {
 281                         logger(LOG_ERR, _("System call `%s' failed: %s"), "mlockall",
 282                                    strerror(errno));
 283 #else
 284         {
 285                 logger(LOG_ERR, _("mlockall() not supported on this platform!"));
 286 #endif
 287                 return -1;
 288         }
 289
 290         g_argv = argv;
 291
 292         init_configuration(&config_tree);
 293
 294         /* Slllluuuuuuurrrrp! */
 295
 296         srand(time(NULL));
 297         RAND_load_file("/dev/urandom", 1024);
 298
 299         ENGINE_load_builtin_engines();
 300         ENGINE_register_all_complete();
 301
 302         OpenSSL_add_all_algorithms();
 303
 304         if(!read_server_config())
 305                 return 1;
 306
 307         if(lzo_init() != LZO_E_OK) {
 308                 logger(LOG_ERR, _("Error initializing LZO compressor!"));
 309                 return 1;
 310         }
 311
 312 #ifdef HAVE_MINGW
 313         if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
 314                 logger(LOG_ERR, _("System call `%s' failed: %s"), "WSAStartup", winerror(GetLastError()));
 315                 return 1;
 316         }
 317
 318         if(!do_detach || !init_service())
 319                 return main2(argc, argv);
 320         else
 321                 return 1;
 322 }
 323
 324 int main2(int argc, char **argv)
 325 {
 326 #endif
 327
 328         if(!detach())
 329                 return 1;
 330
 331
 332         /* Setup sockets and open device. */
 333
 334         if(!setup_network_connections())
 335                 goto end;
 336
 337         /* Start main loop. It only exits when tinc is killed. */
 338
 339         status = main_loop();
 340
 341         /* Shutdown properly. */
 342
 343         close_network_connections();
 344
 345         ifdebug(CONNECTIONS)
 346                 dump_device_stats();
 347
 348 end:
 349         logger(LOG_NOTICE, _("Terminating"));
 350
 351 #ifndef HAVE_MINGW
 352         exit_control();
 353 #endif
 354
 355         EVP_cleanup();
 356
 357         return status;
 358 }