tinc-vpn.org Git - tinc/blob - 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 *pubname;
  59         char *hcfname;
  60         char *key;
  61
  62         if(!c->rsa_key) {
  63                 c->rsa_key = RSA_new();
  64 //              RSA_blinding_on(c->rsa_key, NULL);
  65         }
  66
  67         /* First, check for simple PublicKey statement */
  68
  69         if(get_config_string(lookup_config(c->config_tree, "PublicKey"), &key)) {
  70                 if(BN_hex2bn(&c->rsa_key->n, key) != strlen(key)) {
  71                         logger(LOG_ERR, "Invalid PublicKey for %s!", c->name);
  72                         return false;
  73                 }
  74                 BN_hex2bn(&c->rsa_key->e, "FFFF");
  75                 free(key);
  76                 return true;
  77         }
  78
  79         /* Else, check for PublicKeyFile statement and read it */
  80
  81         if(get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &pubname)) {
  82                 fp = fopen(pubname, "r");
  83
  84                 if(!fp) {
  85                         logger(LOG_ERR, "Error reading RSA public key file `%s': %s", pubname, strerror(errno));
  86                         free(pubname);
  87                         return false;
  88                 }
  89
  90                 c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
  91                 fclose(fp);
  92
  93                 if(c->rsa_key) {
  94                         free(pubname);
  95                         return true;            /* Woohoo. */
  96                 }
  97
  98                 /* If it fails, try PEM_read_RSA_PUBKEY. */
  99                 fp = fopen(pubname, "r");
 100
 101                 if(!fp) {
 102                         logger(LOG_ERR, "Error reading RSA public key file `%s': %s", pubname, strerror(errno));
 103                         free(pubname);
 104                         return false;
 105                 }
 106
 107                 c->rsa_key = PEM_read_RSA_PUBKEY(fp, &c->rsa_key, NULL, NULL);
 108                 fclose(fp);
 109
 110                 if(c->rsa_key) {
 111 //                              RSA_blinding_on(c->rsa_key, NULL);
 112                         free(pubname);
 113                         return true;
 114                 }
 115
 116                 logger(LOG_ERR, "Reading RSA public key file `%s' failed: %s", pubname, strerror(errno));
 117                 free(pubname);
 118                 return false;
 119         }
 120
 121         /* Else, check if a harnessed public key is in the config file */
 122
 123         xasprintf(&hcfname, "%s/hosts/%s", confbase, c->name);
 124         fp = fopen(hcfname, "r");
 125
 126         if(!fp) {
 127                 logger(LOG_ERR, "Error reading RSA public key file `%s': %s", hcfname, strerror(errno));
 128                 free(hcfname);
 129                 return false;
 130         }
 131
 132         c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
 133         fclose(fp);
 134
 135         if(c->rsa_key) {
 136                 free(hcfname);
 137                 return true;
 138         }
 139
 140         /* Try again with PEM_read_RSA_PUBKEY. */
 141
 142         fp = fopen(hcfname, "r");
 143
 144         if(!fp) {
 145                 logger(LOG_ERR, "Error reading RSA public key file `%s': %s", hcfname, strerror(errno));
 146                 free(hcfname);
 147                 return false;
 148         }
 149
 150         free(hcfname);
 151         c->rsa_key = PEM_read_RSA_PUBKEY(fp, &c->rsa_key, NULL, NULL);
 152 //      RSA_blinding_on(c->rsa_key, NULL);
 153         fclose(fp);
 154
 155         if(c->rsa_key)
 156                 return true;
 157
 158         logger(LOG_ERR, "No public key for %s specified!", c->name);
 159
 160         return false;
 161 }
 162
 163 static bool read_rsa_private_key(void) {
 164         FILE *fp;
 165         char *fname, *key, *pubkey;
 166         struct stat s;
 167
 168         if(get_config_string(lookup_config(config_tree, "PrivateKey"), &key)) {
 169                 if(!get_config_string(lookup_config(config_tree, "PublicKey"), &pubkey)) {
 170                         logger(LOG_ERR, "PrivateKey used but no PublicKey found!");
 171                         return false;
 172                 }
 173                 myself->connection->rsa_key = RSA_new();
 174 //              RSA_blinding_on(myself->connection->rsa_key, NULL);
 175                 if(BN_hex2bn(&myself->connection->rsa_key->d, key) != strlen(key)) {
 176                         logger(LOG_ERR, "Invalid PrivateKey for myself!");
 177                         return false;
 178                 }
 179                 if(BN_hex2bn(&myself->connection->rsa_key->n, pubkey) != strlen(pubkey)) {
 180                         logger(LOG_ERR, "Invalid PublicKey for myself!");
 181                         return false;
 182                 }
 183                 BN_hex2bn(&myself->connection->rsa_key->e, "FFFF");
 184                 free(key);
 185                 free(pubkey);
 186                 return true;
 187         }
 188
 189         if(!get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname))
 190                 xasprintf(&fname, "%s/rsa_key.priv", confbase);
 191
 192         fp = fopen(fname, "r");
 193
 194         if(!fp) {
 195                 logger(LOG_ERR, "Error reading RSA private key file `%s': %s",
 196                            fname, strerror(errno));
 197                 free(fname);
 198                 return false;
 199         }
 200
 201 #if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN)
 202         if(fstat(fileno(fp), &s)) {
 203                 logger(LOG_ERR, "Could not stat RSA private key file `%s': %s'",
 204                                 fname, strerror(errno));
 205                 free(fname);
 206                 return false;
 207         }
 208
 209         if(s.st_mode & ~0100700)
 210                 logger(LOG_WARNING, "Warning: insecure file permissions for RSA private key file `%s'!", fname);
 211 #endif
 212
 213         myself->connection->rsa_key = PEM_read_RSAPrivateKey(fp, NULL, NULL, NULL);
 214         fclose(fp);
 215
 216         if(!myself->connection->rsa_key) {
 217                 logger(LOG_ERR, "Reading RSA private key file `%s' failed: %s",
 218                            fname, strerror(errno));
 219                 free(fname);
 220                 return false;
 221         }
 222
 223         free(fname);
 224         return true;
 225 }
 226
 227 /*
 228   Read Subnets from all host config files
 229 */
 230 void load_all_subnets(void) {
 231         DIR *dir;
 232         struct dirent *ent;
 233         char *dname;
 234         char *fname;
 235         avl_tree_t *config_tree;
 236         config_t *cfg;
 237         subnet_t *s, *s2;
 238         node_t *n;
 239
 240         xasprintf(&dname, "%s/hosts", confbase);
 241         dir = opendir(dname);
 242         if(!dir) {
 243                 logger(LOG_ERR, "Could not open %s: %s", dname, strerror(errno));
 244                 free(dname);
 245                 return;
 246         }
 247
 248         while((ent = readdir(dir))) {
 249                 if(!check_id(ent->d_name))
 250                         continue;
 251
 252                 n = lookup_node(ent->d_name);
 253                 #ifdef _DIRENT_HAVE_D_TYPE
 254                 //if(ent->d_type != DT_REG)
 255                 //      continue;
 256                 #endif
 257
 258                 xasprintf(&fname, "%s/hosts/%s", confbase, ent->d_name);
 259                 init_configuration(&config_tree);
 260                 read_config_options(config_tree, ent->d_name);
 261                 read_config_file(config_tree, fname);
 262                 free(fname);
 263
 264                 if(!n) {
 265                         n = new_node();
 266                         n->name = xstrdup(ent->d_name);
 267                         node_add(n);
 268                 }
 269
 270                 for(cfg = lookup_config(config_tree, "Subnet"); cfg; cfg = lookup_config_next(config_tree, cfg)) {
 271                         if(!get_config_subnet(cfg, &s))
 272                                 continue;
 273
 274                         if((s2 = lookup_subnet(n, s))) {
 275                                 s2->expires = -1;
 276                         } else {
 277                                 subnet_add(n, s);
 278                         }
 279                 }
 280
 281                 exit_configuration(&config_tree);
 282         }
 283
 284         closedir(dir);
 285 }
 286
 287 char *get_name(void) {
 288         char *name = NULL;
 289
 290         get_config_string(lookup_config(config_tree, "Name"), &name);
 291
 292         if(!name)
 293                 return NULL;
 294
 295         if(*name == '$') {
 296                 char *envname = getenv(name + 1);
 297                 if(!envname) {
 298                         if(strcmp(name + 1, "HOST")) {
 299                                 fprintf(stderr, "Invalid Name: environment variable %s does not exist\n", name + 1);
 300                                 return false;
 301                         }
 302                         envname = alloca(32);
 303                         if(gethostname(envname, 32)) {
 304                                 fprintf(stderr, "Could not get hostname: %s\n", strerror(errno));
 305                                 return false;
 306                         }
 307                         envname[31] = 0;
 308                 }
 309                 free(name);
 310                 name = xstrdup(envname);
 311                 for(char *c = name; *c; c++)
 312                         if(!isalnum(*c))
 313                                 *c = '_';
 314         }
 315
 316         if(!check_id(name)) {
 317                 logger(LOG_ERR, "Invalid name for myself!");
 318                 free(name);
 319                 return false;
 320         }
 321
 322         return name;
 323 }
 324
 325 /*
 326   Configure node_t myself and set up the local sockets (listen only)
 327 */
 328 static bool setup_myself(void) {
 329         config_t *cfg;
 330         subnet_t *subnet;
 331         char *name, *hostname, *mode, *afname, *cipher, *digest, *type;
 332         char *fname = NULL;
 333         char *address = NULL;
 334         char *proxy = NULL;
 335         char *space;
 336         char *envp[5];
 337         struct addrinfo *ai, *aip, hint = {0};
 338         bool choice;
 339         int i, err;
 340         int replaywin_int;
 341
 342         myself = new_node();
 343         myself->connection = new_connection();
 344
 345         myself->hostname = xstrdup("MYSELF");
 346         myself->connection->hostname = xstrdup("MYSELF");
 347
 348         myself->connection->options = 0;
 349         myself->connection->protocol_version = PROT_CURRENT;
 350
 351         if(!(name = get_name())) {
 352                 logger(LOG_ERR, "Name for tinc daemon required!");
 353                 return false;
 354         }
 355
 356         myself->name = name;
 357         myself->connection->name = xstrdup(name);
 358         xasprintf(&fname, "%s/hosts/%s", confbase, name);
 359         read_config_options(config_tree, name);
 360         read_config_file(config_tree, fname);
 361         free(fname);
 362
 363         if(!read_rsa_private_key())
 364                 return false;
 365
 366         if(!get_config_string(lookup_config(config_tree, "Port"), &myport))
 367                 myport = xstrdup("655");
 368
 369         if(!atoi(myport)) {
 370                 struct addrinfo *ai = str2addrinfo("localhost", myport, SOCK_DGRAM);
 371                 sockaddr_t sa;
 372                 if(!ai || !ai->ai_addr)
 373                         return false;
 374                 free(myport);
 375                 memcpy(&sa, ai->ai_addr, ai->ai_addrlen);
 376                 sockaddr2str(&sa, NULL, &myport);
 377         }
 378
 379         get_config_string(lookup_config(config_tree, "Proxy"), &proxy);
 380         if(proxy) {
 381                 if((space = strchr(proxy, ' ')))
 382                         *space++ = 0;
 383
 384                 if(!strcasecmp(proxy, "none")) {
 385                         proxytype = PROXY_NONE;
 386                 } else if(!strcasecmp(proxy, "socks4")) {
 387                         proxytype = PROXY_SOCKS4;
 388                 } else if(!strcasecmp(proxy, "socks4a")) {
 389                         proxytype = PROXY_SOCKS4A;
 390                 } else if(!strcasecmp(proxy, "socks5")) {
 391                         proxytype = PROXY_SOCKS5;
 392                 } else if(!strcasecmp(proxy, "http")) {
 393                         proxytype = PROXY_HTTP;
 394                 } else if(!strcasecmp(proxy, "exec")) {
 395                         proxytype = PROXY_EXEC;
 396                 } else {
 397                         logger(LOG_ERR, "Unknown proxy type %s!", proxy);
 398                         return false;
 399                 }
 400
 401                 switch(proxytype) {
 402                         case PROXY_NONE:
 403                         default:
 404                                 break;
 405
 406                         case PROXY_EXEC:
 407                                 if(!space || !*space) {
 408                                         logger(LOG_ERR, "Argument expected for proxy type exec!");
 409                                         return false;
 410                                 }
 411                                 proxyhost =  xstrdup(space);
 412                                 break;
 413
 414                         case PROXY_SOCKS4:
 415                         case PROXY_SOCKS4A:
 416                         case PROXY_SOCKS5:
 417                         case PROXY_HTTP:
 418                                 proxyhost = space;
 419                                 if(space && (space = strchr(space, ' ')))
 420                                         *space++ = 0, proxyport = space;
 421                                 if(space && (space = strchr(space, ' ')))
 422                                         *space++ = 0, proxyuser = space;
 423                                 if(space && (space = strchr(space, ' ')))
 424                                         *space++ = 0, proxypass = space;
 425                                 if(!proxyhost || !*proxyhost || !proxyport || !*proxyport) {
 426                                         logger(LOG_ERR, "Host and port argument expected for proxy!");
 427                                         return false;
 428                                 }
 429                                 proxyhost = xstrdup(proxyhost);
 430                                 proxyport = xstrdup(proxyport);
 431                                 if(proxyuser && *proxyuser)
 432                                         proxyuser = xstrdup(proxyuser);
 433                                 if(proxypass && *proxypass)
 434                                         proxypass = xstrdup(proxypass);
 435                                 break;
 436                 }
 437
 438                 free(proxy);
 439         }
 440
 441         /* Read in all the subnets specified in the host configuration file */
 442
 443         cfg = lookup_config(config_tree, "Subnet");
 444
 445         while(cfg) {
 446                 if(!get_config_subnet(cfg, &subnet))
 447                         return false;
 448
 449                 subnet_add(myself, subnet);
 450
 451                 cfg = lookup_config_next(config_tree, cfg);
 452         }
 453
 454         /* Check some options */
 455
 456         if(get_config_bool(lookup_config(config_tree, "IndirectData"), &choice) && choice)
 457                 myself->options |= OPTION_INDIRECT;
 458
 459         if(get_config_bool(lookup_config(config_tree, "TCPOnly"), &choice) && choice)
 460                 myself->options |= OPTION_TCPONLY;
 461
 462         if(myself->options & OPTION_TCPONLY)
 463                 myself->options |= OPTION_INDIRECT;
 464
 465         get_config_bool(lookup_config(config_tree, "DirectOnly"), &directonly);
 466         get_config_bool(lookup_config(config_tree, "StrictSubnets"), &strictsubnets);
 467         get_config_bool(lookup_config(config_tree, "TunnelServer"), &tunnelserver);
 468         get_config_bool(lookup_config(config_tree, "LocalDiscovery"), &localdiscovery);
 469         strictsubnets |= tunnelserver;
 470
 471         if(get_config_string(lookup_config(config_tree, "Mode"), &mode)) {
 472                 if(!strcasecmp(mode, "router"))
 473                         routing_mode = RMODE_ROUTER;
 474                 else if(!strcasecmp(mode, "switch"))
 475                         routing_mode = RMODE_SWITCH;
 476                 else if(!strcasecmp(mode, "hub"))
 477                         routing_mode = RMODE_HUB;
 478                 else {
 479                         logger(LOG_ERR, "Invalid routing mode!");
 480                         return false;
 481                 }
 482                 free(mode);
 483         }
 484
 485         if(get_config_string(lookup_config(config_tree, "Forwarding"), &mode)) {
 486                 if(!strcasecmp(mode, "off"))
 487                         forwarding_mode = FMODE_OFF;
 488                 else if(!strcasecmp(mode, "internal"))
 489                         forwarding_mode = FMODE_INTERNAL;
 490                 else if(!strcasecmp(mode, "kernel"))
 491                         forwarding_mode = FMODE_KERNEL;
 492                 else {
 493                         logger(LOG_ERR, "Invalid forwarding mode!");
 494                         return false;
 495                 }
 496                 free(mode);
 497         }
 498
 499         choice = true;
 500         get_config_bool(lookup_config(config_tree, "PMTUDiscovery"), &choice);
 501         if(choice)
 502                 myself->options |= OPTION_PMTU_DISCOVERY;
 503
 504         choice = true;
 505         get_config_bool(lookup_config(config_tree, "ClampMSS"), &choice);
 506         if(choice)
 507                 myself->options |= OPTION_CLAMP_MSS;
 508
 509         get_config_bool(lookup_config(config_tree, "PriorityInheritance"), &priorityinheritance);
 510         get_config_bool(lookup_config(config_tree, "DecrementTTL"), &decrement_ttl);
 511         if(get_config_string(lookup_config(config_tree, "Broadcast"), &mode)) {
 512                 if(!strcasecmp(mode, "no"))
 513                         broadcast_mode = BMODE_NONE;
 514                 else if(!strcasecmp(mode, "yes") || !strcasecmp(mode, "mst"))
 515                         broadcast_mode = BMODE_MST;
 516                 else if(!strcasecmp(mode, "direct"))
 517                         broadcast_mode = BMODE_DIRECT;
 518                 else {
 519                         logger(LOG_ERR, "Invalid broadcast mode!");
 520                         return false;
 521                 }
 522                 free(mode);
 523         }
 524
 525 #if !defined(SOL_IP) || !defined(IP_TOS)
 526         if(priorityinheritance)
 527                 logger(LOG_WARNING, "%s not supported on this platform", "PriorityInheritance");
 528 #endif
 529
 530         if(!get_config_int(lookup_config(config_tree, "MACExpire"), &macexpire))
 531                 macexpire = 600;
 532
 533         if(get_config_int(lookup_config(config_tree, "MaxTimeout"), &maxtimeout)) {
 534                 if(maxtimeout <= 0) {
 535                         logger(LOG_ERR, "Bogus maximum timeout!");
 536                         return false;
 537                 }
 538         } else
 539                 maxtimeout = 900;
 540
 541         if(get_config_int(lookup_config(config_tree, "UDPRcvBuf"), &udp_rcvbuf)) {
 542                 if(udp_rcvbuf <= 0) {
 543                         logger(LOG_ERR, "UDPRcvBuf cannot be negative!");
 544                         return false;
 545                 }
 546         }
 547
 548         if(get_config_int(lookup_config(config_tree, "UDPSndBuf"), &udp_sndbuf)) {
 549                 if(udp_sndbuf <= 0) {
 550                         logger(LOG_ERR, "UDPSndBuf cannot be negative!");
 551                         return false;
 552                 }
 553         }
 554
 555         if(get_config_int(lookup_config(config_tree, "ReplayWindow"), &replaywin_int)) {
 556                 if(replaywin_int < 0) {
 557                         logger(LOG_ERR, "ReplayWindow cannot be negative!");
 558                         return false;
 559                 }
 560                 replaywin = (unsigned)replaywin_int;
 561         }
 562
 563         if(get_config_string(lookup_config(config_tree, "AddressFamily"), &afname)) {
 564                 if(!strcasecmp(afname, "IPv4"))
 565                         addressfamily = AF_INET;
 566                 else if(!strcasecmp(afname, "IPv6"))
 567                         addressfamily = AF_INET6;
 568                 else if(!strcasecmp(afname, "any"))
 569                         addressfamily = AF_UNSPEC;
 570                 else {
 571                         logger(LOG_ERR, "Invalid address family!");
 572                         return false;
 573                 }
 574                 free(afname);
 575         }
 576
 577         get_config_bool(lookup_config(config_tree, "Hostnames"), &hostnames);
 578
 579         /* Generate packet encryption key */
 580
 581         if(get_config_string
 582            (lookup_config(config_tree, "Cipher"), &cipher)) {
 583                 if(!strcasecmp(cipher, "none")) {
 584                         myself->incipher = NULL;
 585                 } else {
 586                         myself->incipher = EVP_get_cipherbyname(cipher);
 587
 588                         if(!myself->incipher) {
 589                                 logger(LOG_ERR, "Unrecognized cipher type!");
 590                                 return false;
 591                         }
 592                 }
 593         } else
 594                 myself->incipher = EVP_bf_cbc();
 595
 596         if(myself->incipher)
 597                 myself->inkeylength = myself->incipher->key_len + myself->incipher->iv_len;
 598         else
 599                 myself->inkeylength = 1;
 600
 601         myself->connection->outcipher = EVP_bf_ofb();
 602
 603         if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime))
 604                 keylifetime = 3600;
 605
 606         keyexpires = now + keylifetime;
 607
 608         /* Check if we want to use message authentication codes... */
 609
 610         if(get_config_string(lookup_config(config_tree, "Digest"), &digest)) {
 611                 if(!strcasecmp(digest, "none")) {
 612                         myself->indigest = NULL;
 613                 } else {
 614                         myself->indigest = EVP_get_digestbyname(digest);
 615
 616                         if(!myself->indigest) {
 617                                 logger(LOG_ERR, "Unrecognized digest type!");
 618                                 return false;
 619                         }
 620                 }
 621         } else
 622                 myself->indigest = EVP_sha1();
 623
 624         myself->connection->outdigest = EVP_sha1();
 625
 626         if(get_config_int(lookup_config(config_tree, "MACLength"), &myself->inmaclength)) {
 627                 if(myself->indigest) {
 628                         if(myself->inmaclength > myself->indigest->md_size) {
 629                                 logger(LOG_ERR, "MAC length exceeds size of digest!");
 630                                 return false;
 631                         } else if(myself->inmaclength < 0) {
 632                                 logger(LOG_ERR, "Bogus MAC length!");
 633                                 return false;
 634                         }
 635                 }
 636         } else
 637                 myself->inmaclength = 4;
 638
 639         myself->connection->outmaclength = 0;
 640
 641         /* Compression */
 642
 643         if(get_config_int(lookup_config(config_tree, "Compression"), &myself->incompression)) {
 644                 if(myself->incompression < 0 || myself->incompression > 11) {
 645                         logger(LOG_ERR, "Bogus compression level!");
 646                         return false;
 647                 }
 648         } else
 649                 myself->incompression = 0;
 650
 651         myself->connection->outcompression = 0;
 652
 653         /* Done */
 654
 655         myself->nexthop = myself;
 656         myself->via = myself;
 657         myself->status.reachable = true;
 658         node_add(myself);
 659
 660         graph();
 661
 662         if(strictsubnets)
 663                 load_all_subnets();
 664
 665         /* Open device */
 666
 667         devops = os_devops;
 668
 669         if(get_config_string(lookup_config(config_tree, "DeviceType"), &type)) {
 670                 if(!strcasecmp(type, "dummy"))
 671                         devops = dummy_devops;
 672                 else if(!strcasecmp(type, "raw_socket"))
 673                         devops = raw_socket_devops;
 674                 else if(!strcasecmp(type, "multicast"))
 675                         devops = multicast_devops;
 676 #ifdef ENABLE_UML
 677                 else if(!strcasecmp(type, "uml"))
 678                         devops = uml_devops;
 679 #endif
 680 #ifdef ENABLE_VDE
 681                 else if(!strcasecmp(type, "vde"))
 682                         devops = vde_devops;
 683 #endif
 684         }
 685
 686         if(!devops.setup())
 687                 return false;
 688
 689         /* Run tinc-up script to further initialize the tap interface */
 690         xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
 691         xasprintf(&envp[1], "DEVICE=%s", device ? : "");
 692         xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
 693         xasprintf(&envp[3], "NAME=%s", myself->name);
 694         envp[4] = NULL;
 695
 696         execute_script("tinc-up", envp);
 697
 698         for(i = 0; i < 5; i++)
 699                 free(envp[i]);
 700
 701         /* Run subnet-up scripts for our own subnets */
 702
 703         subnet_update(myself, NULL, true);
 704
 705         /* Open sockets */
 706
 707         if(!do_detach && getenv("LISTEN_FDS")) {
 708                 sockaddr_t sa;
 709                 socklen_t salen;
 710
 711                 listen_sockets = atoi(getenv("LISTEN_FDS"));
 712 #ifdef HAVE_UNSETENV
 713                 unsetenv("LISTEN_FDS");
 714 #endif
 715
 716                 if(listen_sockets > MAXSOCKETS) {
 717                         logger(LOG_ERR, "Too many listening sockets");
 718                         return false;
 719                 }
 720
 721                 for(i = 0; i < listen_sockets; i++) {
 722                         salen = sizeof sa;
 723                         if(getsockname(i + 3, &sa.sa, &salen) < 0) {
 724                                 logger(LOG_ERR, "Could not get address of listen fd %d: %s", i + 3, sockstrerror(errno));
 725                                 return false;
 726                         }
 727
 728                         listen_socket[i].tcp = i + 3;
 729
 730 #ifdef FD_CLOEXEC
 731                         fcntl(i + 3, F_SETFD, FD_CLOEXEC);
 732 #endif
 733
 734                         listen_socket[i].udp = setup_vpn_in_socket(&sa);
 735                         if(listen_socket[i].udp < 0)
 736                                 return false;
 737
 738                         ifdebug(CONNECTIONS) {
 739                                 hostname = sockaddr2hostname(&sa);
 740                                 logger(LOG_NOTICE, "Listening on %s", hostname);
 741                                 free(hostname);
 742                         }
 743
 744                         memcpy(&listen_socket[i].sa, &sa, salen);
 745                 }
 746         } else {
 747                 listen_sockets = 0;
 748                 cfg = lookup_config(config_tree, "BindToAddress");
 749
 750                 do {
 751                         get_config_string(cfg, &address);
 752                         if(cfg)
 753                                 cfg = lookup_config_next(config_tree, cfg);
 754
 755                         char *port = myport;
 756
 757                         if(address) {
 758                                 char *space = strchr(address, ' ');
 759                                 if(space) {
 760                                         *space++ = 0;
 761                                         port = space;
 762                                 }
 763
 764                                 if(!strcmp(address, "*"))
 765                                         *address = 0;
 766                         }
 767
 768                         hint.ai_family = addressfamily;
 769                         hint.ai_socktype = SOCK_STREAM;
 770                         hint.ai_protocol = IPPROTO_TCP;
 771                         hint.ai_flags = AI_PASSIVE;
 772
 773                         err = getaddrinfo(address && *address ? address : NULL, port, &hint, &ai);
 774                         free(address);
 775
 776                         if(err || !ai) {
 777                                 logger(LOG_ERR, "System call `%s' failed: %s", "getaddrinfo",
 778                                            gai_strerror(err));
 779                                 return false;
 780                         }
 781
 782                         for(aip = ai; aip; aip = aip->ai_next) {
 783                                 if(listen_sockets >= MAXSOCKETS) {
 784                                         logger(LOG_ERR, "Too many listening sockets");
 785                                         return false;
 786                                 }
 787
 788                                 listen_socket[listen_sockets].tcp =
 789                                         setup_listen_socket((sockaddr_t *) aip->ai_addr);
 790
 791                                 if(listen_socket[listen_sockets].tcp < 0)
 792                                         continue;
 793
 794                                 listen_socket[listen_sockets].udp =
 795                                         setup_vpn_in_socket((sockaddr_t *) aip->ai_addr);
 796
 797                                 if(listen_socket[listen_sockets].udp < 0)
 798                                         continue;
 799
 800                                 ifdebug(CONNECTIONS) {
 801                                         hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
 802                                         logger(LOG_NOTICE, "Listening on %s", hostname);
 803                                         free(hostname);
 804                                 }
 805
 806                                 memcpy(&listen_socket[listen_sockets].sa, aip->ai_addr, aip->ai_addrlen);
 807                                 listen_sockets++;
 808                         }
 809
 810                         freeaddrinfo(ai);
 811                 } while(cfg);
 812         }
 813
 814         if(listen_sockets)
 815                 logger(LOG_NOTICE, "Ready");
 816         else {
 817                 logger(LOG_ERR, "Unable to create any listening socket!");
 818                 return false;
 819         }
 820
 821         return true;
 822 }
 823
 824 /*
 825   initialize network
 826 */
 827 bool setup_network(void) {
 828         now = time(NULL);
 829
 830         init_events();
 831         init_connections();
 832         init_subnets();
 833         init_nodes();
 834         init_edges();
 835         init_requests();
 836
 837         if(get_config_int(lookup_config(config_tree, "PingInterval"), &pinginterval)) {
 838                 if(pinginterval < 1) {
 839                         pinginterval = 86400;
 840                 }
 841         } else
 842                 pinginterval = 60;
 843
 844         if(!get_config_int(lookup_config(config_tree, "PingTimeout"), &pingtimeout))
 845                 pingtimeout = 5;
 846         if(pingtimeout < 1 || pingtimeout > pinginterval)
 847                 pingtimeout = pinginterval;
 848
 849         if(!get_config_int(lookup_config(config_tree, "MaxOutputBufferSize"), &maxoutbufsize))
 850                 maxoutbufsize = 10 * MTU;
 851
 852         if(!setup_myself())
 853                 return false;
 854
 855         return true;
 856 }
 857
 858 /*
 859   close all open network connections
 860 */
 861 void close_network_connections(void) {
 862         avl_node_t *node, *next;
 863         connection_t *c;
 864         char *envp[5];
 865         int i;
 866
 867         for(node = connection_tree->head; node; node = next) {
 868                 next = node->next;
 869                 c = node->data;
 870                 c->outgoing = NULL;
 871                 terminate_connection(c, false);
 872         }
 873
 874         for(list_node_t *node = outgoing_list->head; node; node = node->next) {
 875                 outgoing_t *outgoing = node->data;
 876
 877                 if(outgoing->event)
 878                         event_del(outgoing->event);
 879         }
 880
 881         list_delete_list(outgoing_list);
 882
 883         if(myself && myself->connection) {
 884                 subnet_update(myself, NULL, false);
 885                 terminate_connection(myself->connection, false);
 886                 free_connection(myself->connection);
 887         }
 888
 889         for(i = 0; i < listen_sockets; i++) {
 890                 close(listen_socket[i].tcp);
 891                 close(listen_socket[i].udp);
 892         }
 893
 894         xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
 895         xasprintf(&envp[1], "DEVICE=%s", device ? : "");
 896         xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
 897         xasprintf(&envp[3], "NAME=%s", myself->name);
 898         envp[4] = NULL;
 899
 900         exit_requests();
 901         exit_edges();
 902         exit_subnets();
 903         exit_nodes();
 904         exit_connections();
 905         exit_events();
 906
 907         execute_script("tinc-down", envp);
 908
 909         if(myport) free(myport);
 910
 911         for(i = 0; i < 4; i++)
 912                 free(envp[i]);
 913
 914         devops.close();
 915
 916         return;
 917 }