3 Copyright (C) 1998-2005 Ivo Timmermans,
4 2000-2010 Guus Sliepen <guus@tinc-vpn.org>
5 2006 Scott Lamb <slamb@slamb.org>
6 2010 Brandon Black <blblack@gmail.com>
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.
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.
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.
25 #include "splay_tree.h"
28 #include "connection.h"
45 static struct event device_ev;
47 bool read_rsa_public_key(connection_t *c) {
53 /* First, check for simple PublicKey statement */
55 if(get_config_string(lookup_config(c->config_tree, "PublicKey"), &n)) {
56 result = rsa_set_hex_public_key(&c->rsa, n, "FFFF");
61 /* Else, check for PublicKeyFile statement and read it */
63 if(!get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &fname))
64 xasprintf(&fname, "%s/hosts/%s", confbase, c->name);
66 fp = fopen(fname, "r");
69 logger(LOG_ERR, "Error reading RSA public key file `%s': %s",
70 fname, strerror(errno));
75 result = rsa_read_pem_public_key(&c->rsa, fp);
79 logger(LOG_ERR, "Reading RSA public key file `%s' failed: %s", fname, strerror(errno));
84 bool read_rsa_private_key() {
90 /* First, check for simple PrivateKey statement */
92 if(get_config_string(lookup_config(config_tree, "PrivateKey"), &d)) {
93 if(!get_config_string(lookup_config(config_tree, "PublicKey"), &n)) {
94 logger(LOG_ERR, "PrivateKey used but no PublicKey found!");
98 result = rsa_set_hex_private_key(&myself->connection->rsa, n, "FFFF", d);
104 /* Else, check for PrivateKeyFile statement and read it */
106 if(!get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname))
107 xasprintf(&fname, "%s/rsa_key.priv", confbase);
109 fp = fopen(fname, "r");
112 logger(LOG_ERR, "Error reading RSA private key file `%s': %s",
113 fname, strerror(errno));
118 #if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN)
121 if(fstat(fileno(fp), &s)) {
122 logger(LOG_ERR, "Could not stat RSA private key file `%s': %s'", fname, strerror(errno));
127 if(s.st_mode & ~0100700)
128 logger(LOG_WARNING, "Warning: insecure file permissions for RSA private key file `%s'!", fname);
131 result = rsa_read_pem_private_key(&myself->connection->rsa, fp);
135 logger(LOG_ERR, "Reading RSA private key file `%s' failed: %s", fname, strerror(errno));
140 static struct event keyexpire_event;
142 static void keyexpire_handler(void *data) {
146 void regenerate_key() {
147 ifdebug(STATUS) logger(LOG_INFO, "Expiring symmetric keys");
148 event_del(&keyexpire_event);
149 send_key_changed(broadcast, myself);
150 keyexpire_event.time = time(NULL) + keylifetime;
151 keyexpire_event.handler = keyexpire_handler;
152 event_add(&keyexpire_event);
156 Read Subnets from all host config files
158 void load_all_subnets(void) {
163 splay_tree_t *config_tree;
169 xasprintf(&dname, "%s/hosts", confbase);
170 dir = opendir(dname);
172 logger(LOG_ERR, "Could not open %s: %s", dname, strerror(errno));
177 while((ent = readdir(dir))) {
178 if(!check_id(ent->d_name))
181 n = lookup_node(ent->d_name);
182 #ifdef _DIRENT_HAVE_D_TYPE
183 //if(ent->d_type != DT_REG)
187 xasprintf(&fname, "%s/hosts/%s", confbase, ent->d_name);
188 init_configuration(&config_tree);
189 result = read_config_file(config_tree, fname);
196 n->name = xstrdup(ent->d_name);
200 for(cfg = lookup_config(config_tree, "Subnet"); cfg; cfg = lookup_config_next(config_tree, cfg)) {
201 if(!get_config_subnet(cfg, &s))
204 if((s2 = lookup_subnet(n, s))) {
211 exit_configuration(&config_tree);
218 Configure node_t myself and set up the local sockets (listen only)
220 bool setup_myself(void) {
223 char *name, *hostname, *mode, *afname, *cipher, *digest;
225 char *address = NULL;
227 struct addrinfo *ai, *aip, hint = {0};
233 myself->connection = new_connection();
235 myself->hostname = xstrdup("MYSELF");
236 myself->connection->hostname = xstrdup("MYSELF");
238 myself->connection->options = 0;
239 myself->connection->protocol_version = PROT_CURRENT;
241 if(!get_config_string(lookup_config(config_tree, "Name"), &name)) { /* Not acceptable */
242 logger(LOG_ERR, "Name for tinc daemon required!");
246 if(!check_id(name)) {
247 logger(LOG_ERR, "Invalid name for myself!");
253 myself->connection->name = xstrdup(name);
254 xasprintf(&fname, "%s/hosts/%s", confbase, name);
255 read_config_options(config_tree, name);
256 read_config_file(config_tree, fname);
259 if(!read_rsa_private_key())
262 if(!get_config_string(lookup_config(config_tree, "Port"), &myport))
263 myport = xstrdup("655");
266 struct addrinfo *ai = str2addrinfo("localhost", myport, SOCK_DGRAM);
268 if(!ai || !ai->ai_addr)
271 memcpy(&sa, ai->ai_addr, ai->ai_addrlen);
272 sockaddr2str(&sa, NULL, &myport);
275 /* Read in all the subnets specified in the host configuration file */
277 cfg = lookup_config(config_tree, "Subnet");
280 if(!get_config_subnet(cfg, &subnet))
283 subnet_add(myself, subnet);
285 cfg = lookup_config_next(config_tree, cfg);
288 /* Check some options */
290 if(get_config_bool(lookup_config(config_tree, "IndirectData"), &choice) && choice)
291 myself->options |= OPTION_INDIRECT;
293 if(get_config_bool(lookup_config(config_tree, "TCPOnly"), &choice) && choice)
294 myself->options |= OPTION_TCPONLY;
296 if(myself->options & OPTION_TCPONLY)
297 myself->options |= OPTION_INDIRECT;
299 get_config_bool(lookup_config(config_tree, "DirectOnly"), &directonly);
300 get_config_bool(lookup_config(config_tree, "StrictSubnets"), &strictsubnets);
301 get_config_bool(lookup_config(config_tree, "TunnelServer"), &tunnelserver);
302 strictsubnets |= tunnelserver;
304 if(get_config_string(lookup_config(config_tree, "Mode"), &mode)) {
305 if(!strcasecmp(mode, "router"))
306 routing_mode = RMODE_ROUTER;
307 else if(!strcasecmp(mode, "switch"))
308 routing_mode = RMODE_SWITCH;
309 else if(!strcasecmp(mode, "hub"))
310 routing_mode = RMODE_HUB;
312 logger(LOG_ERR, "Invalid routing mode!");
318 if(get_config_string(lookup_config(config_tree, "Forwarding"), &mode)) {
319 if(!strcasecmp(mode, "off"))
320 forwarding_mode = FMODE_OFF;
321 else if(!strcasecmp(mode, "internal"))
322 forwarding_mode = FMODE_INTERNAL;
323 else if(!strcasecmp(mode, "kernel"))
324 forwarding_mode = FMODE_KERNEL;
326 logger(LOG_ERR, "Invalid forwarding mode!");
333 get_config_bool(lookup_config(config_tree, "PMTUDiscovery"), &choice);
335 myself->options |= OPTION_PMTU_DISCOVERY;
338 get_config_bool(lookup_config(config_tree, "ClampMSS"), &choice);
340 myself->options |= OPTION_CLAMP_MSS;
342 get_config_bool(lookup_config(config_tree, "PriorityInheritance"), &priorityinheritance);
344 #if !defined(SOL_IP) || !defined(IP_TOS)
345 if(priorityinheritance)
346 logger(LOG_WARNING, "%s not supported on this platform", "PriorityInheritance");
349 if(!get_config_int(lookup_config(config_tree, "MACExpire"), &macexpire))
352 if(get_config_int(lookup_config(config_tree, "MaxTimeout"), &maxtimeout)) {
353 if(maxtimeout <= 0) {
354 logger(LOG_ERR, "Bogus maximum timeout!");
360 if(get_config_int(lookup_config(config_tree, "UDPRcvBuf"), &udp_rcvbuf)) {
361 if(udp_rcvbuf <= 0) {
362 logger(LOG_ERR, "UDPRcvBuf cannot be negative!");
367 if(get_config_int(lookup_config(config_tree, "UDPSndBuf"), &udp_sndbuf)) {
368 if(udp_sndbuf <= 0) {
369 logger(LOG_ERR, "UDPSndBuf cannot be negative!");
374 if(get_config_int(lookup_config(config_tree, "ReplayWindow"), &replaywin_int)) {
375 if(replaywin_int < 0) {
376 logger(LOG_ERR, "ReplayWindow cannot be negative!");
379 replaywin = (unsigned)replaywin_int;
382 if(get_config_string(lookup_config(config_tree, "AddressFamily"), &afname)) {
383 if(!strcasecmp(afname, "IPv4"))
384 addressfamily = AF_INET;
385 else if(!strcasecmp(afname, "IPv6"))
386 addressfamily = AF_INET6;
387 else if(!strcasecmp(afname, "any"))
388 addressfamily = AF_UNSPEC;
390 logger(LOG_ERR, "Invalid address family!");
396 get_config_bool(lookup_config(config_tree, "Hostnames"), &hostnames);
398 /* Generate packet encryption key */
400 if(!get_config_string(lookup_config(config_tree, "Cipher"), &cipher))
401 cipher = xstrdup("blowfish");
403 if(!cipher_open_by_name(&myself->incipher, cipher)) {
404 logger(LOG_ERR, "Unrecognized cipher type!");
408 if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime))
413 /* Check if we want to use message authentication codes... */
415 if(!get_config_string(lookup_config(config_tree, "Digest"), &digest))
416 digest = xstrdup("sha1");
419 get_config_int(lookup_config(config_tree, "MACLength"), &maclength);
422 logger(LOG_ERR, "Bogus MAC length!");
426 if(!digest_open_by_name(&myself->indigest, digest, maclength)) {
427 logger(LOG_ERR, "Unrecognized digest type!");
433 if(get_config_int(lookup_config(config_tree, "Compression"), &myself->incompression)) {
434 if(myself->incompression < 0 || myself->incompression > 11) {
435 logger(LOG_ERR, "Bogus compression level!");
439 myself->incompression = 0;
441 myself->connection->outcompression = 0;
445 myself->nexthop = myself;
446 myself->via = myself;
447 myself->status.reachable = true;
460 /* Run tinc-up script to further initialize the tap interface */
461 xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
462 xasprintf(&envp[1], "DEVICE=%s", device ? : "");
463 xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
464 xasprintf(&envp[3], "NAME=%s", myself->name);
467 execute_script("tinc-up", envp);
469 for(i = 0; i < 4; i++)
472 /* Run subnet-up scripts for our own subnets */
474 subnet_update(myself, NULL, true);
478 get_config_string(lookup_config(config_tree, "BindToAddress"), &address);
480 hint.ai_family = addressfamily;
481 hint.ai_socktype = SOCK_STREAM;
482 hint.ai_protocol = IPPROTO_TCP;
483 hint.ai_flags = AI_PASSIVE;
485 err = getaddrinfo(address, myport, &hint, &ai);
488 logger(LOG_ERR, "System call `%s' failed: %s", "getaddrinfo",
495 for(aip = ai; aip; aip = aip->ai_next) {
496 listen_socket[listen_sockets].tcp =
497 setup_listen_socket((sockaddr_t *) aip->ai_addr);
499 if(listen_socket[listen_sockets].tcp < 0)
502 listen_socket[listen_sockets].udp =
503 setup_vpn_in_socket((sockaddr_t *) aip->ai_addr);
505 if(listen_socket[listen_sockets].udp < 0) {
506 close(listen_socket[listen_sockets].tcp);
510 memcpy(&listen_socket[listen_sockets].sa, aip->ai_addr, aip->ai_addrlen);
512 if(!thread_create(&listen_socket[listen_sockets].tcp_thread, handle_new_meta_connection, &listen_socket[listen_sockets])) {
513 logger(LOG_ERR, "thread_create failed: %s", strerror(errno));
517 if(!thread_create(&listen_socket[listen_sockets].udp_thread, handle_incoming_vpn_data, &listen_socket[listen_sockets])) {
518 logger(LOG_ERR, "thread_create failed: %s", strerror(errno));
522 ifdebug(CONNECTIONS) {
523 hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
524 logger(LOG_NOTICE, "Listening on %s", hostname);
530 if(listen_sockets >= MAXSOCKETS) {
531 logger(LOG_WARNING, "Maximum of %d listening sockets reached", MAXSOCKETS);
539 logger(LOG_NOTICE, "Ready");
541 logger(LOG_ERR, "Unable to create any listening socket!");
551 bool setup_network(void) {
558 if(get_config_int(lookup_config(config_tree, "PingInterval"), &pinginterval)) {
559 if(pinginterval < 1) {
560 pinginterval = 86400;
565 if(!get_config_int(lookup_config(config_tree, "PingTimeout"), &pingtimeout))
567 if(pingtimeout < 1 || pingtimeout > pinginterval)
568 pingtimeout = pinginterval;
570 if(!get_config_int(lookup_config(config_tree, "MaxOutputBufferSize"), &maxoutbufsize))
571 maxoutbufsize = 10 * MTU;
580 close all open network connections
582 void close_network_connections(void) {
583 splay_node_t *node, *next;
588 for(node = connection_tree->head; node; node = next) {
592 terminate_connection(c, false);
595 list_delete_list(outgoing_list);
597 if(myself && myself->connection) {
598 subnet_update(myself, NULL, false);
599 terminate_connection(myself->connection, false);
600 free_connection(myself->connection);
603 for(i = 0; i < listen_sockets; i++) {
604 close(listen_socket[i].tcp);
605 close(listen_socket[i].udp);
606 thread_destroy(&listen_socket[i].tcp_thread);
607 thread_destroy(&listen_socket[i].udp_thread);
610 xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
611 xasprintf(&envp[1], "DEVICE=%s", device ? : "");
612 xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
613 xasprintf(&envp[3], "NAME=%s", myself->name);
622 execute_script("tinc-down", envp);
624 if(myport) free(myport);
626 for(i = 0; i < 4; i++)