tincd.c

   1 /*
   2     tincd.c -- the main file for tincd
   3
   4     Copyright (C) 2000-2004 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 #include <getopt.h>
  26
  27 #include "cfg/cfg.h"
  28 #include "fd/event.h"
  29 #include "fd/fd.h"
  30 #include "logger/logger.h"
  31 #include "support/avl.h"
  32 #include "support/sockaddr.h"
  33 #include "support/xalloc.h"
  34 #include "tnl/tnl.h"
  35 #include "vnd/vnd.h"
  36
  37 static bool show_help = false;
  38 static bool show_version = false;
  39 static int kill_tincd = 0;
  40 static bool bypass_security = false;
  41 static bool do_mlock = false;
  42 static bool use_logfile = false;
  43 static bool do_detach = true;
  44 static int debug_level = 1;
  45
  46 static char *confbase = NULL;
  47 static char *identname = NULL;
  48 static char *pidfilename = NULL;
  49 static char *logfilename = NULL;
  50 static char *cfgfilename = NULL;
  51
  52 int tinc_argc;
  53 char **tinc_argv;
  54 cfg_tree_t tinc_cfg;
  55
  56 static struct option const long_options[] = {
  57         {"config", required_argument, NULL, 'c'},
  58         {"kill", optional_argument, NULL, 'k'},
  59         {"net", required_argument, NULL, 'n'},
  60         {"help", no_argument, NULL, 1},
  61         {"version", no_argument, NULL, 2},
  62         {"no-detach", no_argument, NULL, 'D'},
  63         {"debug", optional_argument, NULL, 'd'},
  64         {"bypass-security", no_argument, NULL, 3},
  65         {"mlock", no_argument, NULL, 'L'},
  66         {"logfile", optional_argument, NULL, 4},
  67         {"pidfile", required_argument, NULL, 5},
  68         {NULL, 0, NULL, 0}
  69 };
  70
  71 #ifdef HAVE_MINGW
  72 static struct WSAData wsa_state;
  73 #endif
  74
  75 static void usage(bool status) {
  76         if(status)
  77                 fprintf(stderr, _("Try `%s --help\' for more information.\n"), tinc_argv[0]);
  78         else {
  79                 printf(_("Usage: %s [option]...\n\n"), tinc_argv[0]);
  80                 printf(_("  -c, --config=DIR           Read configuration options from DIR.\n"
  81                                 "  -D, --no-detach            Don't fork and detach.\n"
  82                                 "  -d, --debug[=LEVEL]        Increase debug level or set it to LEVEL.\n"
  83                                 "  -k, --kill[=SIGNAL]        Attempt to kill a running tincd and exit.\n"
  84                                 "  -n, --net=NETNAME          Connect to net NETNAME.\n"
  85                                 "  -L, --mlock                Lock tinc into main memory.\n"
  86                                 "      --logfile[=FILENAME]   Write log entries to a logfile.\n"
  87                                 "      --pidfile=FILENAME     Write PID to FILENAME.\n"
  88                                 "      --help                 Display this help and exit.\n"
  89                                 "      --version              Output version information and exit.\n\n"));
  90                 printf(_("Report bugs to tinc@tinc-vpn.org.\n"));
  91         }
  92 }
  93
  94 static bool parse_options(int argc, char **argv) {
  95         int result;
  96         int option_index = 0;
  97
  98         while((result = getopt_long(argc, argv, "c:DLd::k::n:", long_options, &option_index)) != EOF) {
  99                 switch (result) {
 100                         case 0:
 101                                 break;
 102
 103                         case 'c': /* --config */
 104                                 confbase = xstrdup(optarg);
 105                                 break;
 106
 107                         case 'D': /* --no-detach */
 108                                 do_detach = false;
 109                                 break;
 110
 111                         case 'L': /* --mlock */
 112                                 do_mlock = true;
 113                                 break;
 114
 115                         case 'd': /* --debug */
 116                                 if(optarg)
 117                                         debug_level = atoi(optarg);
 118                                 else
 119                                         debug_level++;
 120                                 break;
 121
 122                         case 'k': /* --kill */
 123 #ifndef HAVE_MINGW
 124                                 if(optarg) {
 125                                         if(!strcasecmp(optarg, "HUP"))
 126                                                 kill_tincd = SIGHUP;
 127                                         else if(!strcasecmp(optarg, "TERM"))
 128                                                 kill_tincd = SIGTERM;
 129                                         else if(!strcasecmp(optarg, "KILL"))
 130                                                 kill_tincd = SIGKILL;
 131                                         else if(!strcasecmp(optarg, "USR1"))
 132                                                 kill_tincd = SIGUSR1;
 133                                         else if(!strcasecmp(optarg, "USR2"))
 134                                                 kill_tincd = SIGUSR2;
 135                                         else if(!strcasecmp(optarg, "WINCH"))
 136                                                 kill_tincd = SIGWINCH;
 137                                         else if(!strcasecmp(optarg, "INT"))
 138                                                 kill_tincd = SIGINT;
 139                                         else if(!strcasecmp(optarg, "ALRM"))
 140                                                 kill_tincd = SIGALRM;
 141                                         else {
 142                                                 kill_tincd = atoi(optarg);
 143
 144                                                 if(!kill_tincd) {
 145                                                         fprintf(stderr, _("Invalid argument `%s'; SIGNAL must be a number or one of HUP, TERM, KILL, USR1, USR2, WINCH, INT or ALRM.\n"),
 146                                                                         optarg);
 147                                                         usage(true);
 148                                                         return false;
 149                                                 }
 150                                         }
 151                                 } else
 152                                         kill_tincd = SIGTERM;
 153 #else
 154                                         kill_tincd = 1;
 155 #endif
 156                                 break;
 157
 158                         case 'n': /* --net */
 159                                 netname = xstrdup(optarg);
 160                                 break;
 161
 162                         case 1: /* --help */
 163                                 show_help = true;
 164                                 break;
 165
 166                         case 2: /* --version */
 167                                 show_version = true;
 168                                 break;
 169
 170                         case 3: /* --bypass-security */
 171                                 bypass_security = true;
 172                                 break;
 173
 174                         case 4: /* --logfile */
 175                                 use_logfile = true;
 176                                 if(optarg)
 177                                         logfilename = xstrdup(optarg);
 178                                 break;
 179
 180                         case 5: /* --pidfile */
 181                                 pidfilename = xstrdup(optarg);
 182                                 break;
 183
 184                         case '?':
 185                                 usage(true);
 186                                 return false;
 187
 188                         default:
 189                                 break;
 190                 }
 191         }
 192
 193         return true;
 194 }
 195
 196 static void make_names(void)
 197 {
 198 #ifdef HAVE_MINGW
 199         HKEY key;
 200         char installdir[1024] = "";
 201         long len = sizeof(installdir);
 202 #endif
 203
 204         if(netname)
 205                 asprintf(&identname, "tinc.%s", netname);
 206         else
 207                 identname = xstrdup("tinc");
 208
 209 #ifdef HAVE_MINGW
 210         if(!RegOpenKeyEx(HKEY_LOCAL_MACHINE, "SOFTWARE\\tinc", 0, KEY_READ, &key)) {
 211                 if(!RegQueryValueEx(key, NULL, 0, 0, installdir, &len)) {
 212                         if(!logfilename)
 213                                 asprintf(&logfilename, "%s/log/%s.log", identname);
 214                         if(!confbase) {
 215                                 if(netname)
 216                                         asprintf(&confbase, "%s/%s", installdir, netname);
 217                                 else
 218                                         asprintf(&confbase, "%s", installdir);
 219                         }
 220                 }
 221                 RegCloseKey(key);
 222                 if(*installdir)
 223                         return;
 224         }
 225 #endif
 226
 227         if(!pidfilename)
 228                 asprintf(&pidfilename, LOCALSTATEDIR "/run/%s.pid", identname);
 229
 230         if(!logfilename)
 231                 asprintf(&logfilename, LOCALSTATEDIR "/log/%s.log", identname);
 232
 233         if(!confbase) {
 234                 if(netname)
 235                         asprintf(&confbase, CONFDIR "/tinc/%s", netname);
 236                 else
 237                         asprintf(&confbase, CONFDIR "/tinc");
 238         }
 239
 240         asprintf(&cfgfilename, "%s/tinc.conf", confbase);
 241 }
 242
 243 int main(int argc, char **argv) {
 244         tinc_argc = argc;
 245         tinc_argv = argv;
 246
 247         setlocale(LC_ALL, "");
 248         bindtextdomain(PACKAGE, LOCALEDIR);
 249         textdomain(PACKAGE);
 250
 251         if(!parse_options(argc, argv))
 252                 return 1;
 253
 254         make_names();
 255
 256         if(show_version) {
 257                 printf(_("%s version %s (built %s %s, protocol %d)\n"), PACKAGE,
 258                            VERSION, __DATE__, __TIME__, PROT_CURRENT);
 259                 printf(_("Copyright (C) 1998-2004 Ivo Timmermans, Guus Sliepen and others.\n"
 260                                 "See the AUTHORS file for a complete list.\n\n"
 261                                 "tinc comes with ABSOLUTELY NO WARRANTY.  This is free software,\n"
 262                                 "and you are welcome to redistribute it under certain conditions;\n"
 263                                 "see the file COPYING for details.\n"));
 264
 265                 return 0;
 266         }
 267
 268         if(show_help) {
 269                 usage(false);
 270                 return 0;
 271         }
 272
 273         if(kill_tincd)
 274                 return !kill_other(kill_tincd);
 275
 276         openlogger("tinc", use_logfile?LOGMODE_FILE:LOGMODE_STDERR);
 277
 278         /* Lock all pages into memory if requested */
 279
 280         if(do_mlock)
 281 #ifdef HAVE_MLOCKALL
 282                 if(mlockall(MCL_CURRENT | MCL_FUTURE)) {
 283                         logger(LOG_ERR, _("System call `%s' failed: %s"), "mlockall",
 284                                    strerror(errno));
 285 #else
 286         {
 287                 logger(LOG_ERR, _("mlockall() not supported on this platform!"));
 288 #endif
 289                 return -1;
 290         }
 291
 292         tinc_cfg = cfg_tree_new();
 293
 294         asprintf(cfgfilename, "%s/tinc.conf", confbase);
 295
 296         if(!cfg_read_file(tinc_cfg, cfgfilename))
 297                 return 1;
 298
 299 #ifdef HAVE_MINGW
 300         if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
 301                 logger(LOG_ERR, _("System call `%s' failed: %s"), "WSAStartup", winerror(GetLastError()));
 302                 return 1;
 303         }
 304 #endif
 305
 306         if(do_detach && !detach())
 307                 return 1;
 308
 309         if(!fd_init() || !tnl_init() || !rt_init())
 310                 return 1;
 311
 312         fd_run();
 313
 314         rt_exit();
 315         tnl_exit();
 316         fd_exit();
 317 end:
 318         logger(LOG_NOTICE, _("Terminating"));
 319
 320 #ifndef HAVE_MINGW
 321         remove_pid(pidfilename);
 322 #endif
 323
 324         logger_exit();
 325
 326         return 0;
 327 }