src/net_setup.c

   1 /*
   2     net_setup.c -- Setup.
   3     Copyright (C) 1998-2005 Ivo Timmermans,
   4                   2000-2012 Guus Sliepen <guus@tinc-vpn.org>
   5                   2006      Scott Lamb <slamb@slamb.org>
   6                   2010      Brandon Black <blblack@gmail.com>
   7
   8     This program is free software; you can redistribute it and/or modify
   9     it under the terms of the GNU General Public License as published by
  10     the Free Software Foundation; either version 2 of the License, or
  11     (at your option) any later version.
  12
  13     This program is distributed in the hope that it will be useful,
  14     but WITHOUT ANY WARRANTY; without even the implied warranty of
  15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16     GNU General Public License for more details.
  17
  18     You should have received a copy of the GNU General Public License along
  19     with this program; if not, write to the Free Software Foundation, Inc.,
  20     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21 */
  22
  23 #include "system.h"
  24
  25 #include <openssl/pem.h>
  26 #include <openssl/rsa.h>
  27 #include <openssl/rand.h>
  28 #include <openssl/err.h>
  29 #include <openssl/evp.h>
  30
  31 #include "avl_tree.h"
  32 #include "conf.h"
  33 #include "connection.h"
  34 #include "device.h"
  35 #include "event.h"
  36 #include "graph.h"
  37 #include "logger.h"
  38 #include "net.h"
  39 #include "netutl.h"
  40 #include "process.h"
  41 #include "protocol.h"
  42 #include "route.h"
  43 #include "subnet.h"
  44 #include "utils.h"
  45 #include "xalloc.h"
  46
  47 char *myport;
  48 devops_t devops;
  49
  50 char *proxyhost;
  51 char *proxyport;
  52 char *proxyuser;
  53 char *proxypass;
  54 proxytype_t proxytype;
  55
  56 bool read_rsa_public_key(connection_t *c) {
  57         FILE *fp;
  58         char *fname;
  59         char *key;
  60
  61         if(!c->rsa_key) {
  62                 c->rsa_key = RSA_new();
  63 //              RSA_blinding_on(c->rsa_key, NULL);
  64         }
  65
  66         /* First, check for simple PublicKey statement */
  67
  68         if(get_config_string(lookup_config(c->config_tree, "PublicKey"), &key)) {
  69                 BN_hex2bn(&c->rsa_key->n, key);
  70                 BN_hex2bn(&c->rsa_key->e, "FFFF");
  71                 free(key);
  72                 return true;
  73         }
  74
  75         /* Else, check for PublicKeyFile statement and read it */
  76
  77         if(get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &fname)) {
  78                 fp = fopen(fname, "r");
  79
  80                 if(!fp) {
  81                         logger(LOG_ERR, "Error reading RSA public key file `%s': %s",
  82                                    fname, strerror(errno));
  83                         free(fname);
  84                         return false;
  85                 }
  86
  87                 free(fname);
  88                 c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
  89                 fclose(fp);
  90
  91                 if(c->rsa_key)
  92                         return true;            /* Woohoo. */
  93
  94                 /* If it fails, try PEM_read_RSA_PUBKEY. */
  95                 fp = fopen(fname, "r");
  96
  97                 if(!fp) {
  98                         logger(LOG_ERR, "Error reading RSA public key file `%s': %s",
  99                                    fname, strerror(errno));
 100                         free(fname);
 101                         return false;
 102                 }
 103
 104                 free(fname);
 105                 c->rsa_key = PEM_read_RSA_PUBKEY(fp, &c->rsa_key, NULL, NULL);
 106                 fclose(fp);
 107
 108                 if(c->rsa_key) {
 109 //                              RSA_blinding_on(c->rsa_key, NULL);
 110                         return true;
 111                 }
 112
 113                 logger(LOG_ERR, "Reading RSA public key file `%s' failed: %s",
 114                            fname, strerror(errno));
 115                 return false;
 116         }
 117
 118         /* Else, check if a harnessed public key is in the config file */
 119
 120         xasprintf(&fname, "%s/hosts/%s", confbase, c->name);
 121         fp = fopen(fname, "r");
 122
 123         if(!fp) {
 124                 logger(LOG_ERR, "Error reading RSA public key file `%s': %s", fname, strerror(errno));
 125                 free(fname);
 126                 return false;
 127         }
 128
 129         c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
 130         fclose(fp);
 131         free(fname);
 132
 133         if(c->rsa_key)
 134                 return true;
 135
 136         /* Try again with PEM_read_RSA_PUBKEY. */
 137
 138         xasprintf(&fname, "%s/hosts/%s", confbase, c->name);
 139         fp = fopen(fname, "r");
 140
 141         if(!fp) {
 142                 logger(LOG_ERR, "Error reading RSA public key file `%s': %s", fname, strerror(errno));
 143                 free(fname);
 144                 return false;
 145         }
 146
 147         c->rsa_key = PEM_read_RSA_PUBKEY(fp, &c->rsa_key, NULL, NULL);
 148 //      RSA_blinding_on(c->rsa_key, NULL);
 149         fclose(fp);
 150         free(fname);
 151
 152         if(c->rsa_key)
 153                 return true;
 154
 155         logger(LOG_ERR, "No public key for %s specified!", c->name);
 156
 157         return false;
 158 }
 159
 160 static bool read_rsa_private_key(void) {
 161         FILE *fp;
 162         char *fname, *key, *pubkey;
 163         struct stat s;
 164
 165         if(get_config_string(lookup_config(config_tree, "PrivateKey"), &key)) {
 166                 if(!get_config_string(lookup_config(config_tree, "PublicKey"), &pubkey)) {
 167                         logger(LOG_ERR, "PrivateKey used but no PublicKey found!");
 168                         return false;
 169                 }
 170                 myself->connection->rsa_key = RSA_new();
 171 //              RSA_blinding_on(myself->connection->rsa_key, NULL);
 172                 BN_hex2bn(&myself->connection->rsa_key->d, key);
 173                 BN_hex2bn(&myself->connection->rsa_key->n, pubkey);
 174                 BN_hex2bn(&myself->connection->rsa_key->e, "FFFF");
 175                 free(key);
 176                 free(pubkey);
 177                 return true;
 178         }
 179
 180         if(!get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname))
 181                 xasprintf(&fname, "%s/rsa_key.priv", confbase);
 182
 183         fp = fopen(fname, "r");
 184
 185         if(!fp) {
 186                 logger(LOG_ERR, "Error reading RSA private key file `%s': %s",
 187                            fname, strerror(errno));
 188                 free(fname);
 189                 return false;
 190         }
 191
 192 #if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN)
 193         if(fstat(fileno(fp), &s)) {
 194                 logger(LOG_ERR, "Could not stat RSA private key file `%s': %s'",
 195                                 fname, strerror(errno));
 196                 free(fname);
 197                 return false;
 198         }
 199
 200         if(s.st_mode & ~0100700)
 201                 logger(LOG_WARNING, "Warning: insecure file permissions for RSA private key file `%s'!", fname);
 202 #endif
 203
 204         myself->connection->rsa_key = PEM_read_RSAPrivateKey(fp, NULL, NULL, NULL);
 205         fclose(fp);
 206
 207         if(!myself->connection->rsa_key) {
 208                 logger(LOG_ERR, "Reading RSA private key file `%s' failed: %s",
 209                            fname, strerror(errno));
 210                 free(fname);
 211                 return false;
 212         }
 213
 214         free(fname);
 215         return true;
 216 }
 217
 218 /*
 219   Read Subnets from all host config files
 220 */
 221 void load_all_subnets(void) {
 222         DIR *dir;
 223         struct dirent *ent;
 224         char *dname;
 225         char *fname;
 226         avl_tree_t *config_tree;
 227         config_t *cfg;
 228         subnet_t *s, *s2;
 229         node_t *n;
 230
 231         xasprintf(&dname, "%s/hosts", confbase);
 232         dir = opendir(dname);
 233         if(!dir) {
 234                 logger(LOG_ERR, "Could not open %s: %s", dname, strerror(errno));
 235                 free(dname);
 236                 return;
 237         }
 238
 239         while((ent = readdir(dir))) {
 240                 if(!check_id(ent->d_name))
 241                         continue;
 242
 243                 n = lookup_node(ent->d_name);
 244                 #ifdef _DIRENT_HAVE_D_TYPE
 245                 //if(ent->d_type != DT_REG)
 246                 //      continue;
 247                 #endif
 248
 249                 xasprintf(&fname, "%s/hosts/%s", confbase, ent->d_name);
 250                 init_configuration(&config_tree);
 251                 read_config_options(config_tree, ent->d_name);
 252                 read_config_file(config_tree, fname);
 253                 free(fname);
 254
 255                 if(!n) {
 256                         n = new_node();
 257                         n->name = xstrdup(ent->d_name);
 258                         node_add(n);
 259                 }
 260
 261                 for(cfg = lookup_config(config_tree, "Subnet"); cfg; cfg = lookup_config_next(config_tree, cfg)) {
 262                         if(!get_config_subnet(cfg, &s))
 263                                 continue;
 264
 265                         if((s2 = lookup_subnet(n, s))) {
 266                                 s2->expires = -1;
 267                         } else {
 268                                 subnet_add(n, s);
 269                         }
 270                 }
 271
 272                 exit_configuration(&config_tree);
 273         }
 274
 275         closedir(dir);
 276 }
 277
 278 char *get_name(void) {
 279         char *name = NULL;
 280
 281         get_config_string(lookup_config(config_tree, "Name"), &name);
 282
 283         if(!name)
 284                 return NULL;
 285
 286         if(*name == '$') {
 287                 char *envname = getenv(name + 1);
 288                 if(!envname) {
 289                         if(strcmp(name + 1, "HOST")) {
 290                                 fprintf(stderr, "Invalid Name: environment variable %s does not exist\n", name + 1);
 291                                 return false;
 292                         }
 293                         envname = alloca(32);
 294                         if(gethostname(envname, 32)) {
 295                                 fprintf(stderr, "Could not get hostname: %s\n", strerror(errno));
 296                                 return false;
 297                         }
 298                         envname[31] = 0;
 299                 }
 300                 free(name);
 301                 name = xstrdup(envname);
 302                 for(char *c = name; *c; c++)
 303                         if(!isalnum(*c))
 304                                 *c = '_';
 305         }
 306
 307         if(!check_id(name)) {
 308                 logger(LOG_ERR, "Invalid name for myself!");
 309                 free(name);
 310                 return false;
 311         }
 312
 313         return name;
 314 }
 315
 316 /*
 317   Configure node_t myself and set up the local sockets (listen only)
 318 */
 319 static bool setup_myself(void) {
 320         config_t *cfg;
 321         subnet_t *subnet;
 322         char *name, *hostname, *mode, *afname, *cipher, *digest, *type;
 323         char *fname = NULL;
 324         char *address = NULL;
 325         char *proxy = NULL;
 326         char *space;
 327         char *envp[5];
 328         struct addrinfo *ai, *aip, hint = {0};
 329         bool choice;
 330         int i, err;
 331         int replaywin_int;
 332
 333         myself = new_node();
 334         myself->connection = new_connection();
 335
 336         myself->hostname = xstrdup("MYSELF");
 337         myself->connection->hostname = xstrdup("MYSELF");
 338
 339         myself->connection->options = 0;
 340         myself->connection->protocol_version = PROT_CURRENT;
 341
 342         if(!(name = get_name())) {
 343                 logger(LOG_ERR, "Name for tinc daemon required!");
 344                 return false;
 345         }
 346
 347         myself->name = name;
 348         myself->connection->name = xstrdup(name);
 349         xasprintf(&fname, "%s/hosts/%s", confbase, name);
 350         read_config_options(config_tree, name);
 351         read_config_file(config_tree, fname);
 352         free(fname);
 353
 354         if(!read_rsa_private_key())
 355                 return false;
 356
 357         if(!get_config_string(lookup_config(config_tree, "Port"), &myport))
 358                 myport = xstrdup("655");
 359
 360         if(!atoi(myport)) {
 361                 struct addrinfo *ai = str2addrinfo("localhost", myport, SOCK_DGRAM);
 362                 sockaddr_t sa;
 363                 if(!ai || !ai->ai_addr)
 364                         return false;
 365                 free(myport);
 366                 memcpy(&sa, ai->ai_addr, ai->ai_addrlen);
 367                 sockaddr2str(&sa, NULL, &myport);
 368         }
 369
 370         get_config_string(lookup_config(config_tree, "Proxy"), &proxy);
 371         if(proxy) {
 372                 if((space = strchr(proxy, ' ')))
 373                         *space++ = 0;
 374
 375                 if(!strcasecmp(proxy, "none")) {
 376                         proxytype = PROXY_NONE;
 377                 } else if(!strcasecmp(proxy, "socks4")) {
 378                         proxytype = PROXY_SOCKS4;
 379                 } else if(!strcasecmp(proxy, "socks4a")) {
 380                         proxytype = PROXY_SOCKS4A;
 381                 } else if(!strcasecmp(proxy, "socks5")) {
 382                         proxytype = PROXY_SOCKS5;
 383                 } else if(!strcasecmp(proxy, "http")) {
 384                         proxytype = PROXY_HTTP;
 385                 } else if(!strcasecmp(proxy, "exec")) {
 386                         proxytype = PROXY_EXEC;
 387                 } else {
 388                         logger(LOG_ERR, "Unknown proxy type %s!", proxy);
 389                         return false;
 390                 }
 391
 392                 switch(proxytype) {
 393                         case PROXY_NONE:
 394                         default:
 395                                 break;
 396
 397                         case PROXY_EXEC:
 398                                 if(!space || !*space) {
 399                                         logger(LOG_ERR, "Argument expected for proxy type exec!");
 400                                         return false;
 401                                 }
 402                                 proxyhost =  xstrdup(space);
 403                                 break;
 404
 405                         case PROXY_SOCKS4:
 406                         case PROXY_SOCKS4A:
 407                         case PROXY_SOCKS5:
 408                         case PROXY_HTTP:
 409                                 proxyhost = space;
 410                                 if(space && (space = strchr(space, ' ')))
 411                                         *space++ = 0, proxyport = space;
 412                                 if(space && (space = strchr(space, ' ')))
 413                                         *space++ = 0, proxyuser = space;
 414                                 if(space && (space = strchr(space, ' ')))
 415                                         *space++ = 0, proxypass = space;
 416                                 if(!proxyhost || !*proxyhost || !proxyport || !*proxyport) {
 417                                         logger(LOG_ERR, "Host and port argument expected for proxy!");
 418                                         return false;
 419                                 }
 420                                 proxyhost = xstrdup(proxyhost);
 421                                 proxyport = xstrdup(proxyport);
 422                                 if(proxyuser && *proxyuser)
 423                                         proxyuser = xstrdup(proxyuser);
 424                                 if(proxypass && *proxypass)
 425                                         proxyuser = xstrdup(proxypass);
 426                                 break;
 427                 }
 428
 429                 free(proxy);
 430         }
 431
 432         /* Read in all the subnets specified in the host configuration file */
 433
 434         cfg = lookup_config(config_tree, "Subnet");
 435
 436         while(cfg) {
 437                 if(!get_config_subnet(cfg, &subnet))
 438                         return false;
 439
 440                 subnet_add(myself, subnet);
 441
 442                 cfg = lookup_config_next(config_tree, cfg);
 443         }
 444
 445         /* Check some options */
 446
 447         if(get_config_bool(lookup_config(config_tree, "IndirectData"), &choice) && choice)
 448                 myself->options |= OPTION_INDIRECT;
 449
 450         if(get_config_bool(lookup_config(config_tree, "TCPOnly"), &choice) && choice)
 451                 myself->options |= OPTION_TCPONLY;
 452
 453         if(myself->options & OPTION_TCPONLY)
 454                 myself->options |= OPTION_INDIRECT;
 455
 456         get_config_bool(lookup_config(config_tree, "DirectOnly"), &directonly);
 457         get_config_bool(lookup_config(config_tree, "StrictSubnets"), &strictsubnets);
 458         get_config_bool(lookup_config(config_tree, "TunnelServer"), &tunnelserver);
 459         get_config_bool(lookup_config(config_tree, "LocalDiscovery"), &localdiscovery);
 460         strictsubnets |= tunnelserver;
 461
 462         if(get_config_string(lookup_config(config_tree, "Mode"), &mode)) {
 463                 if(!strcasecmp(mode, "router"))
 464                         routing_mode = RMODE_ROUTER;
 465                 else if(!strcasecmp(mode, "switch"))
 466                         routing_mode = RMODE_SWITCH;
 467                 else if(!strcasecmp(mode, "hub"))
 468                         routing_mode = RMODE_HUB;
 469                 else {
 470                         logger(LOG_ERR, "Invalid routing mode!");
 471                         return false;
 472                 }
 473                 free(mode);
 474         }
 475
 476         if(get_config_string(lookup_config(config_tree, "Forwarding"), &mode)) {
 477                 if(!strcasecmp(mode, "off"))
 478                         forwarding_mode = FMODE_OFF;
 479                 else if(!strcasecmp(mode, "internal"))
 480                         forwarding_mode = FMODE_INTERNAL;
 481                 else if(!strcasecmp(mode, "kernel"))
 482                         forwarding_mode = FMODE_KERNEL;
 483                 else {
 484                         logger(LOG_ERR, "Invalid forwarding mode!");
 485                         return false;
 486                 }
 487                 free(mode);
 488         }
 489
 490         choice = true;
 491         get_config_bool(lookup_config(config_tree, "PMTUDiscovery"), &choice);
 492         if(choice)
 493                 myself->options |= OPTION_PMTU_DISCOVERY;
 494
 495         choice = true;
 496         get_config_bool(lookup_config(config_tree, "ClampMSS"), &choice);
 497         if(choice)
 498                 myself->options |= OPTION_CLAMP_MSS;
 499
 500         get_config_bool(lookup_config(config_tree, "PriorityInheritance"), &priorityinheritance);
 501         get_config_bool(lookup_config(config_tree, "DecrementTTL"), &decrement_ttl);
 502         if(get_config_string(lookup_config(config_tree, "Broadcast"), &mode)) {
 503                 if(!strcasecmp(mode, "no"))
 504                         broadcast_mode = BMODE_NONE;
 505                 else if(!strcasecmp(mode, "yes") || !strcasecmp(mode, "mst"))
 506                         broadcast_mode = BMODE_MST;
 507                 else if(!strcasecmp(mode, "direct"))
 508                         broadcast_mode = BMODE_DIRECT;
 509                 else {
 510                         logger(LOG_ERR, "Invalid broadcast mode!");
 511                         return false;
 512                 }
 513                 free(mode);
 514         }
 515
 516 #if !defined(SOL_IP) || !defined(IP_TOS)
 517         if(priorityinheritance)
 518                 logger(LOG_WARNING, "%s not supported on this platform", "PriorityInheritance");
 519 #endif
 520
 521         if(!get_config_int(lookup_config(config_tree, "MACExpire"), &macexpire))
 522                 macexpire = 600;
 523
 524         if(get_config_int(lookup_config(config_tree, "MaxTimeout"), &maxtimeout)) {
 525                 if(maxtimeout <= 0) {
 526                         logger(LOG_ERR, "Bogus maximum timeout!");
 527                         return false;
 528                 }
 529         } else
 530                 maxtimeout = 900;
 531
 532         if(get_config_int(lookup_config(config_tree, "UDPRcvBuf"), &udp_rcvbuf)) {
 533                 if(udp_rcvbuf <= 0) {
 534                         logger(LOG_ERR, "UDPRcvBuf cannot be negative!");
 535                         return false;
 536                 }
 537         }
 538
 539         if(get_config_int(lookup_config(config_tree, "UDPSndBuf"), &udp_sndbuf)) {
 540                 if(udp_sndbuf <= 0) {
 541                         logger(LOG_ERR, "UDPSndBuf cannot be negative!");
 542                         return false;
 543                 }
 544         }
 545
 546         if(get_config_int(lookup_config(config_tree, "ReplayWindow"), &replaywin_int)) {
 547                 if(replaywin_int < 0) {
 548                         logger(LOG_ERR, "ReplayWindow cannot be negative!");
 549                         return false;
 550                 }
 551                 replaywin = (unsigned)replaywin_int;
 552         }
 553
 554         if(get_config_string(lookup_config(config_tree, "AddressFamily"), &afname)) {
 555                 if(!strcasecmp(afname, "IPv4"))
 556                         addressfamily = AF_INET;
 557                 else if(!strcasecmp(afname, "IPv6"))
 558                         addressfamily = AF_INET6;
 559                 else if(!strcasecmp(afname, "any"))
 560                         addressfamily = AF_UNSPEC;
 561                 else {
 562                         logger(LOG_ERR, "Invalid address family!");
 563                         return false;
 564                 }
 565                 free(afname);
 566         }
 567
 568         get_config_bool(lookup_config(config_tree, "Hostnames"), &hostnames);
 569
 570         /* Generate packet encryption key */
 571
 572         if(get_config_string
 573            (lookup_config(config_tree, "Cipher"), &cipher)) {
 574                 if(!strcasecmp(cipher, "none")) {
 575                         myself->incipher = NULL;
 576                 } else {
 577                         myself->incipher = EVP_get_cipherbyname(cipher);
 578
 579                         if(!myself->incipher) {
 580                                 logger(LOG_ERR, "Unrecognized cipher type!");
 581                                 return false;
 582                         }
 583                 }
 584         } else
 585                 myself->incipher = EVP_bf_cbc();
 586
 587         if(myself->incipher)
 588                 myself->inkeylength = myself->incipher->key_len + myself->incipher->iv_len;
 589         else
 590                 myself->inkeylength = 1;
 591
 592         myself->connection->outcipher = EVP_bf_ofb();
 593
 594         if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime))
 595                 keylifetime = 3600;
 596
 597         keyexpires = now + keylifetime;
 598
 599         /* Check if we want to use message authentication codes... */
 600
 601         if(get_config_string(lookup_config(config_tree, "Digest"), &digest)) {
 602                 if(!strcasecmp(digest, "none")) {
 603                         myself->indigest = NULL;
 604                 } else {
 605                         myself->indigest = EVP_get_digestbyname(digest);
 606
 607                         if(!myself->indigest) {
 608                                 logger(LOG_ERR, "Unrecognized digest type!");
 609                                 return false;
 610                         }
 611                 }
 612         } else
 613                 myself->indigest = EVP_sha1();
 614
 615         myself->connection->outdigest = EVP_sha1();
 616
 617         if(get_config_int(lookup_config(config_tree, "MACLength"), &myself->inmaclength)) {
 618                 if(myself->indigest) {
 619                         if(myself->inmaclength > myself->indigest->md_size) {
 620                                 logger(LOG_ERR, "MAC length exceeds size of digest!");
 621                                 return false;
 622                         } else if(myself->inmaclength < 0) {
 623                                 logger(LOG_ERR, "Bogus MAC length!");
 624                                 return false;
 625                         }
 626                 }
 627         } else
 628                 myself->inmaclength = 4;
 629
 630         myself->connection->outmaclength = 0;
 631
 632         /* Compression */
 633
 634         if(get_config_int(lookup_config(config_tree, "Compression"), &myself->incompression)) {
 635                 if(myself->incompression < 0 || myself->incompression > 11) {
 636                         logger(LOG_ERR, "Bogus compression level!");
 637                         return false;
 638                 }
 639         } else
 640                 myself->incompression = 0;
 641
 642         myself->connection->outcompression = 0;
 643
 644         /* Done */
 645
 646         myself->nexthop = myself;
 647         myself->via = myself;
 648         myself->status.reachable = true;
 649         node_add(myself);
 650
 651         graph();
 652
 653         if(strictsubnets)
 654                 load_all_subnets();
 655
 656         /* Open device */
 657
 658         devops = os_devops;
 659
 660         if(get_config_string(lookup_config(config_tree, "DeviceType"), &type)) {
 661                 if(!strcasecmp(type, "dummy"))
 662                         devops = dummy_devops;
 663                 else if(!strcasecmp(type, "raw_socket"))
 664                         devops = raw_socket_devops;
 665                 else if(!strcasecmp(type, "multicast"))
 666                         devops = multicast_devops;
 667 #ifdef ENABLE_UML
 668                 else if(!strcasecmp(type, "uml"))
 669                         devops = uml_devops;
 670 #endif
 671 #ifdef ENABLE_VDE
 672                 else if(!strcasecmp(type, "vde"))
 673                         devops = vde_devops;
 674 #endif
 675         }
 676
 677         if(!devops.setup())
 678                 return false;
 679
 680         /* Run tinc-up script to further initialize the tap interface */
 681         xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
 682         xasprintf(&envp[1], "DEVICE=%s", device ? : "");
 683         xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
 684         xasprintf(&envp[3], "NAME=%s", myself->name);
 685         envp[4] = NULL;
 686
 687         execute_script("tinc-up", envp);
 688
 689         for(i = 0; i < 5; i++)
 690                 free(envp[i]);
 691
 692         /* Run subnet-up scripts for our own subnets */
 693
 694         subnet_update(myself, NULL, true);
 695
 696         /* Open sockets */
 697
 698         if(!do_detach && getenv("LISTEN_FDS")) {
 699                 sockaddr_t sa;
 700                 socklen_t salen;
 701
 702                 listen_sockets = atoi(getenv("LISTEN_FDS"));
 703 #ifdef HAVE_UNSETENV
 704                 unsetenv("LISTEN_FDS");
 705 #endif
 706
 707                 if(listen_sockets > MAXSOCKETS) {
 708                         logger(LOG_ERR, "Too many listening sockets");
 709                         return false;
 710                 }
 711
 712                 for(i = 0; i < listen_sockets; i++) {
 713                         salen = sizeof sa;
 714                         if(getsockname(i + 3, &sa.sa, &salen) < 0) {
 715                                 logger(LOG_ERR, "Could not get address of listen fd %d: %s", i + 3, sockstrerror(errno));
 716                                 return false;
 717                         }
 718
 719                         listen_socket[i].tcp = i + 3;
 720
 721 #ifdef FD_CLOEXEC
 722                         fcntl(i + 3, F_SETFD, FD_CLOEXEC);
 723 #endif
 724
 725                         listen_socket[i].udp = setup_vpn_in_socket(&sa);
 726                         if(listen_socket[i].udp < 0)
 727                                 return false;
 728
 729                         ifdebug(CONNECTIONS) {
 730                                 hostname = sockaddr2hostname(&sa);
 731                                 logger(LOG_NOTICE, "Listening on %s", hostname);
 732                                 free(hostname);
 733                         }
 734
 735                         memcpy(&listen_socket[i].sa, &sa, salen);
 736                 }
 737         } else {
 738                 listen_sockets = 0;
 739                 cfg = lookup_config(config_tree, "BindToAddress");
 740
 741                 do {
 742                         get_config_string(cfg, &address);
 743                         if(cfg)
 744                                 cfg = lookup_config_next(config_tree, cfg);
 745
 746                         char *port = myport;
 747
 748                         if(address) {
 749                                 char *space = strchr(address, ' ');
 750                                 if(space) {
 751                                         *space++ = 0;
 752                                         port = space;
 753                                 }
 754
 755                                 if(!strcmp(address, "*"))
 756                                         *address = 0;
 757                         }
 758
 759                         hint.ai_family = addressfamily;
 760                         hint.ai_socktype = SOCK_STREAM;
 761                         hint.ai_protocol = IPPROTO_TCP;
 762                         hint.ai_flags = AI_PASSIVE;
 763
 764                         err = getaddrinfo(address && *address ? address : NULL, port, &hint, &ai);
 765                         free(address);
 766
 767                         if(err || !ai) {
 768                                 logger(LOG_ERR, "System call `%s' failed: %s", "getaddrinfo",
 769                                            gai_strerror(err));
 770                                 return false;
 771                         }
 772
 773                         for(aip = ai; aip; aip = aip->ai_next) {
 774                                 if(listen_sockets >= MAXSOCKETS) {
 775                                         logger(LOG_ERR, "Too many listening sockets");
 776                                         return false;
 777                                 }
 778
 779                                 listen_socket[listen_sockets].tcp =
 780                                         setup_listen_socket((sockaddr_t *) aip->ai_addr);
 781
 782                                 if(listen_socket[listen_sockets].tcp < 0)
 783                                         continue;
 784
 785                                 listen_socket[listen_sockets].udp =
 786                                         setup_vpn_in_socket((sockaddr_t *) aip->ai_addr);
 787
 788                                 if(listen_socket[listen_sockets].udp < 0)
 789                                         continue;
 790
 791                                 ifdebug(CONNECTIONS) {
 792                                         hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
 793                                         logger(LOG_NOTICE, "Listening on %s", hostname);
 794                                         free(hostname);
 795                                 }
 796
 797                                 memcpy(&listen_socket[listen_sockets].sa, aip->ai_addr, aip->ai_addrlen);
 798                                 listen_sockets++;
 799                         }
 800
 801                         freeaddrinfo(ai);
 802                 } while(cfg);
 803         }
 804
 805         if(listen_sockets)
 806                 logger(LOG_NOTICE, "Ready");
 807         else {
 808                 logger(LOG_ERR, "Unable to create any listening socket!");
 809                 return false;
 810         }
 811
 812         return true;
 813 }
 814
 815 /*
 816   initialize network
 817 */
 818 bool setup_network(void) {
 819         now = time(NULL);
 820
 821         init_events();
 822         init_connections();
 823         init_subnets();
 824         init_nodes();
 825         init_edges();
 826         init_requests();
 827
 828         if(get_config_int(lookup_config(config_tree, "PingInterval"), &pinginterval)) {
 829                 if(pinginterval < 1) {
 830                         pinginterval = 86400;
 831                 }
 832         } else
 833                 pinginterval = 60;
 834
 835         if(!get_config_int(lookup_config(config_tree, "PingTimeout"), &pingtimeout))
 836                 pingtimeout = 5;
 837         if(pingtimeout < 1 || pingtimeout > pinginterval)
 838                 pingtimeout = pinginterval;
 839
 840         if(!get_config_int(lookup_config(config_tree, "MaxOutputBufferSize"), &maxoutbufsize))
 841                 maxoutbufsize = 10 * MTU;
 842
 843         if(!setup_myself())
 844                 return false;
 845
 846         return true;
 847 }
 848
 849 /*
 850   close all open network connections
 851 */
 852 void close_network_connections(void) {
 853         avl_node_t *node, *next;
 854         connection_t *c;
 855         char *envp[5];
 856         int i;
 857
 858         for(node = connection_tree->head; node; node = next) {
 859                 next = node->next;
 860                 c = node->data;
 861                 c->outgoing = NULL;
 862                 terminate_connection(c, false);
 863         }
 864
 865         for(list_node_t *node = outgoing_list->head; node; node = node->next) {
 866                 outgoing_t *outgoing = node->data;
 867
 868                 if(outgoing->event)
 869                         event_del(outgoing->event);
 870         }
 871
 872         list_delete_list(outgoing_list);
 873
 874         if(myself && myself->connection) {
 875                 subnet_update(myself, NULL, false);
 876                 terminate_connection(myself->connection, false);
 877                 free_connection(myself->connection);
 878         }
 879
 880         for(i = 0; i < listen_sockets; i++) {
 881                 close(listen_socket[i].tcp);
 882                 close(listen_socket[i].udp);
 883         }
 884
 885         xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
 886         xasprintf(&envp[1], "DEVICE=%s", device ? : "");
 887         xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
 888         xasprintf(&envp[3], "NAME=%s", myself->name);
 889         envp[4] = NULL;
 890
 891         exit_requests();
 892         exit_edges();
 893         exit_subnets();
 894         exit_nodes();
 895         exit_connections();
 896         exit_events();
 897
 898         execute_script("tinc-down", envp);
 899
 900         if(myport) free(myport);
 901
 902         for(i = 0; i < 4; i++)
 903                 free(envp[i]);
 904
 905         devops.close();
 906
 907         return;
 908 }