3 Copyright (C) 1998-2005 Ivo Timmermans,
4 2000-2014 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.
27 #include "connection.h"
47 static io_t device_io;
54 proxytype_t proxytype;
56 bool disablebuggypeers;
58 char *scriptinterpreter;
59 char *scriptextension;
61 bool node_read_ecdsa_public_key(node_t *n) {
62 if(ecdsa_active(n->ecdsa))
65 splay_tree_t *config_tree;
70 init_configuration(&config_tree);
71 if(!read_host_config(config_tree, n->name))
74 /* First, check for simple ECDSAPublicKey statement */
76 if(get_config_string(lookup_config(config_tree, "ECDSAPublicKey"), &p)) {
77 n->ecdsa = ecdsa_set_base64_public_key(p);
82 /* Else, check for ECDSAPublicKeyFile statement and read it */
84 if(!get_config_string(lookup_config(config_tree, "ECDSAPublicKeyFile"), &pubname))
85 xasprintf(&pubname, "%s" SLASH "hosts" SLASH "%s", confbase, n->name);
87 fp = fopen(pubname, "r");
92 n->ecdsa = ecdsa_read_pem_public_key(fp);
96 exit_configuration(&config_tree);
101 bool read_ecdsa_public_key(connection_t *c) {
102 if(ecdsa_active(c->ecdsa))
109 if(!c->config_tree) {
110 init_configuration(&c->config_tree);
111 if(!read_host_config(c->config_tree, c->name))
115 /* First, check for simple ECDSAPublicKey statement */
117 if(get_config_string(lookup_config(c->config_tree, "ECDSAPublicKey"), &p)) {
118 c->ecdsa = ecdsa_set_base64_public_key(p);
123 /* Else, check for ECDSAPublicKeyFile statement and read it */
125 if(!get_config_string(lookup_config(c->config_tree, "ECDSAPublicKeyFile"), &fname))
126 xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, c->name);
128 fp = fopen(fname, "r");
131 logger(DEBUG_ALWAYS, LOG_ERR, "Error reading ECDSA public key file `%s': %s",
132 fname, strerror(errno));
137 c->ecdsa = ecdsa_read_pem_public_key(fp);
141 logger(DEBUG_ALWAYS, LOG_ERR, "Parsing ECDSA public key file `%s' failed.", fname);
146 bool read_rsa_public_key(connection_t *c) {
147 if(ecdsa_active(c->ecdsa))
154 /* First, check for simple PublicKey statement */
156 if(get_config_string(lookup_config(c->config_tree, "PublicKey"), &n)) {
157 c->rsa = rsa_set_hex_public_key(n, "FFFF");
162 /* Else, check for PublicKeyFile statement and read it */
164 if(!get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &fname))
165 xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, c->name);
167 fp = fopen(fname, "r");
170 logger(DEBUG_ALWAYS, LOG_ERR, "Error reading RSA public key file `%s': %s", fname, strerror(errno));
175 c->rsa = rsa_read_pem_public_key(fp);
179 logger(DEBUG_ALWAYS, LOG_ERR, "Reading RSA public key file `%s' failed: %s", fname, strerror(errno));
184 static bool read_ecdsa_private_key(void) {
188 /* Check for PrivateKeyFile statement and read it */
190 if(!get_config_string(lookup_config(config_tree, "ECDSAPrivateKeyFile"), &fname))
191 xasprintf(&fname, "%s" SLASH "ecdsa_key.priv", confbase);
193 fp = fopen(fname, "r");
196 logger(DEBUG_ALWAYS, LOG_ERR, "Error reading ECDSA private key file `%s': %s", fname, strerror(errno));
198 logger(DEBUG_ALWAYS, LOG_INFO, "Create an ECDSA keypair with `tinc -n %s generate-ecdsa-keys'.", netname ?: ".");
203 #if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN)
206 if(fstat(fileno(fp), &s)) {
207 logger(DEBUG_ALWAYS, LOG_ERR, "Could not stat ECDSA private key file `%s': %s'", fname, strerror(errno));
212 if(s.st_mode & ~0100700)
213 logger(DEBUG_ALWAYS, LOG_WARNING, "Warning: insecure file permissions for ECDSA private key file `%s'!", fname);
216 myself->connection->ecdsa = ecdsa_read_pem_private_key(fp);
219 if(!myself->connection->ecdsa)
220 logger(DEBUG_ALWAYS, LOG_ERR, "Reading ECDSA private key file `%s' failed: %s", fname, strerror(errno));
222 return myself->connection->ecdsa;
225 static bool read_invitation_key(void) {
230 ecdsa_free(invitation_key);
231 invitation_key = NULL;
234 xasprintf(&fname, "%s" SLASH "invitations" SLASH "ecdsa_key.priv", confbase);
236 fp = fopen(fname, "r");
239 invitation_key = ecdsa_read_pem_private_key(fp);
242 logger(DEBUG_ALWAYS, LOG_ERR, "Reading ECDSA private key file `%s' failed: %s", fname, strerror(errno));
246 return invitation_key;
249 static bool read_rsa_private_key(void) {
254 /* First, check for simple PrivateKey statement */
256 if(get_config_string(lookup_config(config_tree, "PrivateKey"), &d)) {
257 if(!get_config_string(lookup_config(config_tree, "PublicKey"), &n)) {
258 logger(DEBUG_ALWAYS, LOG_ERR, "PrivateKey used but no PublicKey found!");
262 myself->connection->rsa = rsa_set_hex_private_key(n, "FFFF", d);
265 return myself->connection->rsa;
268 /* Else, check for PrivateKeyFile statement and read it */
270 if(!get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname))
271 xasprintf(&fname, "%s" SLASH "rsa_key.priv", confbase);
273 fp = fopen(fname, "r");
276 logger(DEBUG_ALWAYS, LOG_ERR, "Error reading RSA private key file `%s': %s",
277 fname, strerror(errno));
282 #if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN)
285 if(fstat(fileno(fp), &s)) {
286 logger(DEBUG_ALWAYS, LOG_ERR, "Could not stat RSA private key file `%s': %s'", fname, strerror(errno));
291 if(s.st_mode & ~0100700)
292 logger(DEBUG_ALWAYS, LOG_WARNING, "Warning: insecure file permissions for RSA private key file `%s'!", fname);
295 myself->connection->rsa = rsa_read_pem_private_key(fp);
298 if(!myself->connection->rsa)
299 logger(DEBUG_ALWAYS, LOG_ERR, "Reading RSA private key file `%s' failed: %s", fname, strerror(errno));
301 return myself->connection->rsa;
304 static timeout_t keyexpire_timeout;
306 static void keyexpire_handler(void *data) {
308 timeout_set(data, &(struct timeval){keylifetime, rand() % 100000});
311 void regenerate_key(void) {
312 logger(DEBUG_STATUS, LOG_INFO, "Expiring symmetric keys");
317 Read Subnets from all host config files
319 void load_all_subnets(void) {
324 xasprintf(&dname, "%s" SLASH "hosts", confbase);
325 dir = opendir(dname);
327 logger(DEBUG_ALWAYS, LOG_ERR, "Could not open %s: %s", dname, strerror(errno));
332 while((ent = readdir(dir))) {
333 if(!check_id(ent->d_name))
336 node_t *n = lookup_node(ent->d_name);
337 #ifdef _DIRENT_HAVE_D_TYPE
338 //if(ent->d_type != DT_REG)
342 splay_tree_t *config_tree;
343 init_configuration(&config_tree);
344 read_config_options(config_tree, ent->d_name);
345 read_host_config(config_tree, ent->d_name);
349 n->name = xstrdup(ent->d_name);
353 for(config_t *cfg = lookup_config(config_tree, "Subnet"); cfg; cfg = lookup_config_next(config_tree, cfg)) {
356 if(!get_config_subnet(cfg, &s))
359 if((s2 = lookup_subnet(n, s))) {
366 exit_configuration(&config_tree);
372 void load_all_nodes(void) {
377 xasprintf(&dname, "%s" SLASH "hosts", confbase);
378 dir = opendir(dname);
380 logger(DEBUG_ALWAYS, LOG_ERR, "Could not open %s: %s", dname, strerror(errno));
385 while((ent = readdir(dir))) {
386 if(!check_id(ent->d_name))
389 node_t *n = lookup_node(ent->d_name);
394 n->name = xstrdup(ent->d_name);
402 char *get_name(void) {
405 get_config_string(lookup_config(config_tree, "Name"), &name);
411 char *envname = getenv(name + 1);
412 char hostname[32] = "";
414 if(strcmp(name + 1, "HOST")) {
415 logger(DEBUG_ALWAYS, LOG_ERR, "Invalid Name: environment variable %s does not exist\n", name + 1);
418 if(gethostname(hostname, sizeof hostname) || !*hostname) {
419 logger(DEBUG_ALWAYS, LOG_ERR, "Could not get hostname: %s\n", strerror(errno));
426 name = xstrdup(envname);
427 for(char *c = name; *c; c++)
432 if(!check_id(name)) {
433 logger(DEBUG_ALWAYS, LOG_ERR, "Invalid name for myself!");
441 bool setup_myself_reloadable(void) {
447 char *address = NULL;
451 free(scriptinterpreter);
452 scriptinterpreter = NULL;
453 get_config_string(lookup_config(config_tree, "ScriptsInterpreter"), &scriptinterpreter);
456 free(scriptextension);
457 if(!get_config_string(lookup_config(config_tree, "ScriptsExtension"), &scriptextension))
458 scriptextension = xstrdup("");
460 get_config_string(lookup_config(config_tree, "Proxy"), &proxy);
462 if((space = strchr(proxy, ' ')))
465 if(!strcasecmp(proxy, "none")) {
466 proxytype = PROXY_NONE;
467 } else if(!strcasecmp(proxy, "socks4")) {
468 proxytype = PROXY_SOCKS4;
469 } else if(!strcasecmp(proxy, "socks4a")) {
470 proxytype = PROXY_SOCKS4A;
471 } else if(!strcasecmp(proxy, "socks5")) {
472 proxytype = PROXY_SOCKS5;
473 } else if(!strcasecmp(proxy, "http")) {
474 proxytype = PROXY_HTTP;
475 } else if(!strcasecmp(proxy, "exec")) {
476 proxytype = PROXY_EXEC;
478 logger(DEBUG_ALWAYS, LOG_ERR, "Unknown proxy type %s!", proxy);
488 if(!space || !*space) {
489 logger(DEBUG_ALWAYS, LOG_ERR, "Argument expected for proxy type exec!");
492 proxyhost = xstrdup(space);
500 if(space && (space = strchr(space, ' ')))
501 *space++ = 0, proxyport = space;
502 if(space && (space = strchr(space, ' ')))
503 *space++ = 0, proxyuser = space;
504 if(space && (space = strchr(space, ' ')))
505 *space++ = 0, proxypass = space;
506 if(!proxyhost || !*proxyhost || !proxyport || !*proxyport) {
507 logger(DEBUG_ALWAYS, LOG_ERR, "Host and port argument expected for proxy!");
510 proxyhost = xstrdup(proxyhost);
511 proxyport = xstrdup(proxyport);
512 if(proxyuser && *proxyuser)
513 proxyuser = xstrdup(proxyuser);
514 if(proxypass && *proxypass)
515 proxypass = xstrdup(proxypass);
522 if(get_config_bool(lookup_config(config_tree, "IndirectData"), &choice) && choice)
523 myself->options |= OPTION_INDIRECT;
525 if(get_config_bool(lookup_config(config_tree, "TCPOnly"), &choice) && choice)
526 myself->options |= OPTION_TCPONLY;
528 if(myself->options & OPTION_TCPONLY)
529 myself->options |= OPTION_INDIRECT;
531 get_config_bool(lookup_config(config_tree, "DirectOnly"), &directonly);
532 get_config_bool(lookup_config(config_tree, "LocalDiscovery"), &localdiscovery);
534 memset(&localdiscovery_address, 0, sizeof localdiscovery_address);
535 if(get_config_string(lookup_config(config_tree, "LocalDiscoveryAddress"), &address)) {
536 struct addrinfo *ai = str2addrinfo(address, myport, SOCK_DGRAM);
540 memcpy(&localdiscovery_address, ai->ai_addr, ai->ai_addrlen);
544 if(get_config_string(lookup_config(config_tree, "Mode"), &rmode)) {
545 if(!strcasecmp(rmode, "router"))
546 routing_mode = RMODE_ROUTER;
547 else if(!strcasecmp(rmode, "switch"))
548 routing_mode = RMODE_SWITCH;
549 else if(!strcasecmp(rmode, "hub"))
550 routing_mode = RMODE_HUB;
552 logger(DEBUG_ALWAYS, LOG_ERR, "Invalid routing mode!");
558 if(get_config_string(lookup_config(config_tree, "Forwarding"), &fmode)) {
559 if(!strcasecmp(fmode, "off"))
560 forwarding_mode = FMODE_OFF;
561 else if(!strcasecmp(fmode, "internal"))
562 forwarding_mode = FMODE_INTERNAL;
563 else if(!strcasecmp(fmode, "kernel"))
564 forwarding_mode = FMODE_KERNEL;
566 logger(DEBUG_ALWAYS, LOG_ERR, "Invalid forwarding mode!");
573 get_config_bool(lookup_config(config_tree, "PMTUDiscovery"), &choice);
575 myself->options |= OPTION_PMTU_DISCOVERY;
578 get_config_bool(lookup_config(config_tree, "ClampMSS"), &choice);
580 myself->options |= OPTION_CLAMP_MSS;
582 get_config_bool(lookup_config(config_tree, "PriorityInheritance"), &priorityinheritance);
583 get_config_bool(lookup_config(config_tree, "DecrementTTL"), &decrement_ttl);
584 if(get_config_string(lookup_config(config_tree, "Broadcast"), &bmode)) {
585 if(!strcasecmp(bmode, "no"))
586 broadcast_mode = BMODE_NONE;
587 else if(!strcasecmp(bmode, "yes") || !strcasecmp(bmode, "mst"))
588 broadcast_mode = BMODE_MST;
589 else if(!strcasecmp(bmode, "direct"))
590 broadcast_mode = BMODE_DIRECT;
592 logger(DEBUG_ALWAYS, LOG_ERR, "Invalid broadcast mode!");
598 #if !defined(SOL_IP) || !defined(IP_TOS)
599 if(priorityinheritance)
600 logger(DEBUG_ALWAYS, LOG_WARNING, "%s not supported on this platform", "PriorityInheritance");
603 if(!get_config_int(lookup_config(config_tree, "MACExpire"), &macexpire))
606 if(get_config_int(lookup_config(config_tree, "MaxTimeout"), &maxtimeout)) {
607 if(maxtimeout <= 0) {
608 logger(DEBUG_ALWAYS, LOG_ERR, "Bogus maximum timeout!");
614 if(get_config_string(lookup_config(config_tree, "AddressFamily"), &afname)) {
615 if(!strcasecmp(afname, "IPv4"))
616 addressfamily = AF_INET;
617 else if(!strcasecmp(afname, "IPv6"))
618 addressfamily = AF_INET6;
619 else if(!strcasecmp(afname, "any"))
620 addressfamily = AF_UNSPEC;
622 logger(DEBUG_ALWAYS, LOG_ERR, "Invalid address family!");
628 get_config_bool(lookup_config(config_tree, "Hostnames"), &hostnames);
630 if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime))
633 get_config_int(lookup_config(config_tree, "AutoConnect"), &autoconnect);
637 get_config_bool(lookup_config(config_tree, "DisableBuggyPeers"), &disablebuggypeers);
639 read_invitation_key();
645 Add listening sockets.
647 static bool add_listen_address(char *address, bool bindto) {
651 char *space = strchr(address, ' ');
657 if(!strcmp(address, "*"))
661 struct addrinfo *ai, hint = {0};
662 hint.ai_family = addressfamily;
663 hint.ai_socktype = SOCK_STREAM;
664 hint.ai_protocol = IPPROTO_TCP;
665 hint.ai_flags = AI_PASSIVE;
667 int err = getaddrinfo(address && *address ? address : NULL, port, &hint, &ai);
671 logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "getaddrinfo", err == EAI_SYSTEM ? strerror(err) : gai_strerror(err));
675 for(struct addrinfo *aip = ai; aip; aip = aip->ai_next) {
676 // Ignore duplicate addresses
679 for(int i = 0; i < listen_sockets; i++)
680 if(!memcmp(&listen_socket[i].sa, aip->ai_addr, aip->ai_addrlen)) {
688 if(listen_sockets >= MAXSOCKETS) {
689 logger(DEBUG_ALWAYS, LOG_ERR, "Too many listening sockets");
693 int tcp_fd = setup_listen_socket((sockaddr_t *) aip->ai_addr);
698 int udp_fd = setup_vpn_in_socket((sockaddr_t *) aip->ai_addr);
705 io_add(&listen_socket[listen_sockets].tcp, handle_new_meta_connection, &listen_socket[listen_sockets], tcp_fd, IO_READ);
706 io_add(&listen_socket[listen_sockets].udp, handle_incoming_vpn_data, &listen_socket[listen_sockets], udp_fd, IO_READ);
708 if(debug_level >= DEBUG_CONNECTIONS) {
709 char *hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
710 logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Listening on %s", hostname);
714 listen_socket[listen_sockets].bindto = bindto;
715 memcpy(&listen_socket[listen_sockets].sa, aip->ai_addr, aip->ai_addrlen);
724 Configure node_t myself and set up the local sockets (listen only)
726 static bool setup_myself(void) {
727 char *name, *hostname, *cipher, *digest, *type;
728 char *address = NULL;
729 bool port_specified = false;
731 if(!(name = get_name())) {
732 logger(DEBUG_ALWAYS, LOG_ERR, "Name for tinc daemon required!");
737 myself->connection = new_connection();
739 myself->connection->name = xstrdup(name);
740 read_host_config(config_tree, name);
742 if(!get_config_string(lookup_config(config_tree, "Port"), &myport))
743 myport = xstrdup("655");
745 port_specified = true;
747 myself->connection->options = 0;
748 myself->connection->protocol_major = PROT_MAJOR;
749 myself->connection->protocol_minor = PROT_MINOR;
751 myself->options |= PROT_MINOR << 24;
753 if(!get_config_bool(lookup_config(config_tree, "ExperimentalProtocol"), &experimental)) {
754 experimental = read_ecdsa_private_key();
756 logger(DEBUG_ALWAYS, LOG_WARNING, "Support for SPTPS disabled.");
758 if(experimental && !read_ecdsa_private_key())
762 if(!read_rsa_private_key())
765 /* Ensure myport is numeric */
768 struct addrinfo *ai = str2addrinfo("localhost", myport, SOCK_DGRAM);
770 if(!ai || !ai->ai_addr)
773 memcpy(&sa, ai->ai_addr, ai->ai_addrlen);
774 sockaddr2str(&sa, NULL, &myport);
777 /* Read in all the subnets specified in the host configuration file */
779 for(config_t *cfg = lookup_config(config_tree, "Subnet"); cfg; cfg = lookup_config_next(config_tree, cfg)) {
782 if(!get_config_subnet(cfg, &subnet))
785 subnet_add(myself, subnet);
788 /* Check some options */
790 if(!setup_myself_reloadable())
793 get_config_bool(lookup_config(config_tree, "StrictSubnets"), &strictsubnets);
794 get_config_bool(lookup_config(config_tree, "TunnelServer"), &tunnelserver);
795 strictsubnets |= tunnelserver;
797 if(get_config_int(lookup_config(config_tree, "MaxConnectionBurst"), &max_connection_burst)) {
798 if(max_connection_burst <= 0) {
799 logger(DEBUG_ALWAYS, LOG_ERR, "MaxConnectionBurst cannot be negative!");
804 if(get_config_int(lookup_config(config_tree, "UDPRcvBuf"), &udp_rcvbuf)) {
805 if(udp_rcvbuf <= 0) {
806 logger(DEBUG_ALWAYS, LOG_ERR, "UDPRcvBuf cannot be negative!");
811 if(get_config_int(lookup_config(config_tree, "UDPSndBuf"), &udp_sndbuf)) {
812 if(udp_sndbuf <= 0) {
813 logger(DEBUG_ALWAYS, LOG_ERR, "UDPSndBuf cannot be negative!");
819 if(get_config_int(lookup_config(config_tree, "ReplayWindow"), &replaywin_int)) {
820 if(replaywin_int < 0) {
821 logger(DEBUG_ALWAYS, LOG_ERR, "ReplayWindow cannot be negative!");
824 replaywin = (unsigned)replaywin_int;
825 sptps_replaywin = replaywin;
828 /* Generate packet encryption key */
830 if(!get_config_string(lookup_config(config_tree, "Cipher"), &cipher))
831 cipher = xstrdup("blowfish");
833 if(!strcasecmp(cipher, "none")) {
834 myself->incipher = NULL;
835 } else if(!(myself->incipher = cipher_open_by_name(cipher))) {
836 logger(DEBUG_ALWAYS, LOG_ERR, "Unrecognized cipher type!");
842 timeout_add(&keyexpire_timeout, keyexpire_handler, &keyexpire_timeout, &(struct timeval){keylifetime, rand() % 100000});
844 /* Check if we want to use message authentication codes... */
847 get_config_int(lookup_config(config_tree, "MACLength"), &maclength);
850 logger(DEBUG_ALWAYS, LOG_ERR, "Bogus MAC length!");
854 if(!get_config_string(lookup_config(config_tree, "Digest"), &digest))
855 digest = xstrdup("sha1");
857 if(!strcasecmp(digest, "none")) {
858 myself->indigest = NULL;
859 } else if(!(myself->indigest = digest_open_by_name(digest, maclength))) {
860 logger(DEBUG_ALWAYS, LOG_ERR, "Unrecognized digest type!");
868 if(get_config_int(lookup_config(config_tree, "Compression"), &myself->incompression)) {
869 if(myself->incompression < 0 || myself->incompression > 11) {
870 logger(DEBUG_ALWAYS, LOG_ERR, "Bogus compression level!");
874 myself->incompression = 0;
876 myself->connection->outcompression = 0;
880 myself->nexthop = myself;
881 myself->via = myself;
882 myself->status.reachable = true;
883 myself->last_state_change = now.tv_sec;
884 myself->status.sptps = experimental;
898 if(get_config_string(lookup_config(config_tree, "DeviceType"), &type)) {
899 if(!strcasecmp(type, "dummy"))
900 devops = dummy_devops;
901 else if(!strcasecmp(type, "raw_socket"))
902 devops = raw_socket_devops;
903 else if(!strcasecmp(type, "multicast"))
904 devops = multicast_devops;
906 else if(!strcasecmp(type, "uml"))
910 else if(!strcasecmp(type, "vde"))
919 io_add(&device_io, handle_device_data, NULL, device_fd, IO_READ);
923 if(!do_detach && getenv("LISTEN_FDS")) {
927 listen_sockets = atoi(getenv("LISTEN_FDS"));
929 unsetenv("LISTEN_FDS");
932 if(listen_sockets > MAXSOCKETS) {
933 logger(DEBUG_ALWAYS, LOG_ERR, "Too many listening sockets");
937 for(int i = 0; i < listen_sockets; i++) {
939 if(getsockname(i + 3, &sa.sa, &salen) < 0) {
940 logger(DEBUG_ALWAYS, LOG_ERR, "Could not get address of listen fd %d: %s", i + 3, sockstrerror(errno));
945 fcntl(i + 3, F_SETFD, FD_CLOEXEC);
948 int udp_fd = setup_vpn_in_socket(&sa);
952 io_add(&listen_socket[i].tcp, (io_cb_t)handle_new_meta_connection, &listen_socket[i], i + 3, IO_READ);
953 io_add(&listen_socket[i].udp, (io_cb_t)handle_incoming_vpn_data, &listen_socket[i], udp_fd, IO_READ);
955 if(debug_level >= DEBUG_CONNECTIONS) {
956 hostname = sockaddr2hostname(&sa);
957 logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Listening on %s", hostname);
961 memcpy(&listen_socket[i].sa, &sa, salen);
967 for(config_t *cfg = lookup_config(config_tree, "BindToAddress"); cfg; cfg = lookup_config_next(config_tree, cfg)) {
969 get_config_string(cfg, &address);
970 if(!add_listen_address(address, true))
974 for(config_t *cfg = lookup_config(config_tree, "ListenAddress"); cfg; cfg = lookup_config_next(config_tree, cfg)) {
976 get_config_string(cfg, &address);
977 if(!add_listen_address(address, false))
982 if(!add_listen_address(address, NULL))
986 if(!listen_sockets) {
987 logger(DEBUG_ALWAYS, LOG_ERR, "Unable to create any listening socket!");
991 /* If no Port option was specified, set myport to the port used by the first listening socket. */
993 if(!port_specified) {
995 socklen_t salen = sizeof sa;
996 if(!getsockname(listen_socket[0].udp.fd, &sa.sa, &salen)) {
998 sockaddr2str(&sa, NULL, &myport);
1000 myport = xstrdup("655");
1004 xasprintf(&myself->hostname, "MYSELF port %s", myport);
1005 myself->connection->hostname = xstrdup(myself->hostname);
1009 last_config_check = now.tv_sec;
1017 bool setup_network(void) {
1024 if(get_config_int(lookup_config(config_tree, "PingInterval"), &pinginterval)) {
1025 if(pinginterval < 1) {
1026 pinginterval = 86400;
1031 if(!get_config_int(lookup_config(config_tree, "PingTimeout"), &pingtimeout))
1033 if(pingtimeout < 1 || pingtimeout > pinginterval)
1034 pingtimeout = pinginterval;
1036 if(!get_config_int(lookup_config(config_tree, "MaxOutputBufferSize"), &maxoutbufsize))
1037 maxoutbufsize = 10 * MTU;
1045 /* Run tinc-up script to further initialize the tap interface */
1047 char *envp[5] = {NULL};
1048 xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
1049 xasprintf(&envp[1], "DEVICE=%s", device ? : "");
1050 xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
1051 xasprintf(&envp[3], "NAME=%s", myself->name);
1053 execute_script("tinc-up", envp);
1055 for(int i = 0; i < 4; i++)
1058 /* Run subnet-up scripts for our own subnets */
1060 subnet_update(myself, NULL, true);
1066 close all open network connections
1068 void close_network_connections(void) {
1069 for(list_node_t *node = connection_list->head, *next; node; node = next) {
1071 connection_t *c = node->data;
1072 /* Keep control connections open until the end, so they know when we really terminated */
1073 if(c->status.control)
1076 terminate_connection(c, false);
1080 list_delete_list(outgoing_list);
1082 if(myself && myself->connection) {
1083 subnet_update(myself, NULL, false);
1084 terminate_connection(myself->connection, false);
1085 free_connection(myself->connection);
1088 for(int i = 0; i < listen_sockets; i++) {
1089 io_del(&listen_socket[i].tcp);
1090 io_del(&listen_socket[i].udp);
1091 close(listen_socket[i].tcp.fd);
1092 close(listen_socket[i].udp.fd);
1095 char *envp[5] = {NULL};
1096 xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
1097 xasprintf(&envp[1], "DEVICE=%s", device ? : "");
1098 xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
1099 xasprintf(&envp[3], "NAME=%s", myself->name);
1107 execute_script("tinc-down", envp);
1109 if(myport) free(myport);
1111 for(int i = 0; i < 4; i++)