/* net_setup.c -- Setup. Copyright (C) 1998-2005 Ivo Timmermans, 2000-2012 Guus Sliepen 2006 Scott Lamb 2010 Brandon Black This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include "system.h" #include "cipher.h" #include "conf.h" #include "connection.h" #include "control.h" #include "device.h" #include "digest.h" #include "ecdsa.h" #include "graph.h" #include "logger.h" #include "net.h" #include "netutl.h" #include "process.h" #include "protocol.h" #include "route.h" #include "rsa.h" #include "subnet.h" #include "utils.h" #include "xalloc.h" char *myport; static struct event device_ev; devops_t devops; char *proxyhost; char *proxyport; char *proxyuser; char *proxypass; proxytype_t proxytype; char *scriptinterpreter; char *scriptextension; bool node_read_ecdsa_public_key(node_t *n) { if(ecdsa_active(&n->ecdsa)) return true; splay_tree_t *config_tree; FILE *fp; char *pubname = NULL, *hcfname = NULL; char *p; bool result = false; xasprintf(&hcfname, "%s" SLASH "hosts" SLASH "%s", confbase, n->name); init_configuration(&config_tree); if(!read_config_file(config_tree, hcfname)) goto exit; /* First, check for simple ECDSAPublicKey statement */ if(get_config_string(lookup_config(config_tree, "ECDSAPublicKey"), &p)) { result = ecdsa_set_base64_public_key(&n->ecdsa, p); free(p); goto exit; } /* Else, check for ECDSAPublicKeyFile statement and read it */ if(!get_config_string(lookup_config(config_tree, "ECDSAPublicKeyFile"), &pubname)) xasprintf(&pubname, "%s" SLASH "hosts" SLASH "%s", confbase, n->name); fp = fopen(pubname, "r"); if(!fp) { logger(DEBUG_ALWAYS, LOG_ERR, "Error reading ECDSA public key file `%s': %s", pubname, strerror(errno)); goto exit; } result = ecdsa_read_pem_public_key(&n->ecdsa, fp); fclose(fp); exit: exit_configuration(&config_tree); free(hcfname); free(pubname); return result; } bool read_ecdsa_public_key(connection_t *c) { FILE *fp; char *fname; char *p; bool result; /* First, check for simple ECDSAPublicKey statement */ if(get_config_string(lookup_config(c->config_tree, "ECDSAPublicKey"), &p)) { result = ecdsa_set_base64_public_key(&c->ecdsa, p); free(p); return result; } /* Else, check for ECDSAPublicKeyFile statement and read it */ if(!get_config_string(lookup_config(c->config_tree, "ECDSAPublicKeyFile"), &fname)) xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, c->name); fp = fopen(fname, "r"); if(!fp) { logger(DEBUG_ALWAYS, LOG_ERR, "Error reading ECDSA public key file `%s': %s", fname, strerror(errno)); free(fname); return false; } result = ecdsa_read_pem_public_key(&c->ecdsa, fp); fclose(fp); if(!result) logger(DEBUG_ALWAYS, LOG_ERR, "Parsing ECDSA public key file `%s' failed.", fname); free(fname); return result; } bool read_rsa_public_key(connection_t *c) { FILE *fp; char *fname; char *n; bool result; /* First, check for simple PublicKey statement */ if(get_config_string(lookup_config(c->config_tree, "PublicKey"), &n)) { result = rsa_set_hex_public_key(&c->rsa, n, "FFFF"); free(n); return result; } /* Else, check for PublicKeyFile statement and read it */ if(!get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &fname)) xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, c->name); fp = fopen(fname, "r"); if(!fp) { logger(DEBUG_ALWAYS, LOG_ERR, "Error reading RSA public key file `%s': %s", fname, strerror(errno)); free(fname); return false; } result = rsa_read_pem_public_key(&c->rsa, fp); fclose(fp); if(!result) logger(DEBUG_ALWAYS, LOG_ERR, "Reading RSA public key file `%s' failed: %s", fname, strerror(errno)); free(fname); return result; } static bool read_ecdsa_private_key(void) { FILE *fp; char *fname; bool result; /* Check for PrivateKeyFile statement and read it */ if(!get_config_string(lookup_config(config_tree, "ECDSAPrivateKeyFile"), &fname)) xasprintf(&fname, "%s" SLASH "ecdsa_key.priv", confbase); fp = fopen(fname, "r"); if(!fp) { logger(DEBUG_ALWAYS, LOG_ERR, "Error reading ECDSA private key file `%s': %s", fname, strerror(errno)); free(fname); return false; } #if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN) struct stat s; if(fstat(fileno(fp), &s)) { logger(DEBUG_ALWAYS, LOG_ERR, "Could not stat ECDSA private key file `%s': %s'", fname, strerror(errno)); free(fname); return false; } if(s.st_mode & ~0100700) logger(DEBUG_ALWAYS, LOG_WARNING, "Warning: insecure file permissions for ECDSA private key file `%s'!", fname); #endif result = ecdsa_read_pem_private_key(&myself->connection->ecdsa, fp); fclose(fp); if(!result) logger(DEBUG_ALWAYS, LOG_ERR, "Reading ECDSA private key file `%s' failed: %s", fname, strerror(errno)); free(fname); return result; } static bool read_rsa_private_key(void) { FILE *fp; char *fname; char *n, *d; bool result; /* First, check for simple PrivateKey statement */ if(get_config_string(lookup_config(config_tree, "PrivateKey"), &d)) { if(!get_config_string(lookup_config(config_tree, "PublicKey"), &n)) { logger(DEBUG_ALWAYS, LOG_ERR, "PrivateKey used but no PublicKey found!"); free(d); return false; } result = rsa_set_hex_private_key(&myself->connection->rsa, n, "FFFF", d); free(n); free(d); return result; } /* Else, check for PrivateKeyFile statement and read it */ if(!get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname)) xasprintf(&fname, "%s" SLASH "rsa_key.priv", confbase); fp = fopen(fname, "r"); if(!fp) { logger(DEBUG_ALWAYS, LOG_ERR, "Error reading RSA private key file `%s': %s", fname, strerror(errno)); free(fname); return false; } #if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN) struct stat s; if(fstat(fileno(fp), &s)) { logger(DEBUG_ALWAYS, LOG_ERR, "Could not stat RSA private key file `%s': %s'", fname, strerror(errno)); free(fname); return false; } if(s.st_mode & ~0100700) logger(DEBUG_ALWAYS, LOG_WARNING, "Warning: insecure file permissions for RSA private key file `%s'!", fname); #endif result = rsa_read_pem_private_key(&myself->connection->rsa, fp); fclose(fp); if(!result) logger(DEBUG_ALWAYS, LOG_ERR, "Reading RSA private key file `%s' failed: %s", fname, strerror(errno)); free(fname); return result; } static struct event keyexpire_event; static void keyexpire_handler(int fd, short events, void *data) { regenerate_key(); } void regenerate_key(void) { if(timeout_initialized(&keyexpire_event)) { logger(DEBUG_STATUS, LOG_INFO, "Expiring symmetric keys"); event_del(&keyexpire_event); send_key_changed(); } else { timeout_set(&keyexpire_event, keyexpire_handler, NULL); } event_add(&keyexpire_event, &(struct timeval){keylifetime, 0}); } /* Read Subnets from all host config files */ void load_all_subnets(void) { DIR *dir; struct dirent *ent; char *dname; xasprintf(&dname, "%s" SLASH "hosts", confbase); dir = opendir(dname); if(!dir) { logger(DEBUG_ALWAYS, LOG_ERR, "Could not open %s: %s", dname, strerror(errno)); free(dname); return; } while((ent = readdir(dir))) { if(!check_id(ent->d_name)) continue; node_t *n = lookup_node(ent->d_name); #ifdef _DIRENT_HAVE_D_TYPE //if(ent->d_type != DT_REG) // continue; #endif char *fname; xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, ent->d_name); splay_tree_t *config_tree; init_configuration(&config_tree); read_config_options(config_tree, ent->d_name); read_config_file(config_tree, fname); free(fname); if(!n) { n = new_node(); n->name = xstrdup(ent->d_name); node_add(n); } for(config_t *cfg = lookup_config(config_tree, "Subnet"); cfg; cfg = lookup_config_next(config_tree, cfg)) { subnet_t *s, *s2; if(!get_config_subnet(cfg, &s)) continue; if((s2 = lookup_subnet(n, s))) { s2->expires = -1; } else { subnet_add(n, s); } } exit_configuration(&config_tree); } closedir(dir); } char *get_name(void) { char *name = NULL; get_config_string(lookup_config(config_tree, "Name"), &name); if(!name) return NULL; if(*name == '$') { char *envname = getenv(name + 1); if(!envname) { if(strcmp(name + 1, "HOST")) { logger(DEBUG_ALWAYS, LOG_ERR, "Invalid Name: environment variable %s does not exist\n", name + 1); return false; } envname = alloca(32); if(gethostname(envname, 32)) { logger(DEBUG_ALWAYS, LOG_ERR, "Could not get hostname: %s\n", strerror(errno)); return false; } envname[31] = 0; } free(name); name = xstrdup(envname); for(char *c = name; *c; c++) if(!isalnum(*c)) *c = '_'; } if(!check_id(name)) { logger(DEBUG_ALWAYS, LOG_ERR, "Invalid name for myself!"); free(name); return false; } return name; } bool setup_myself_reloadable(void) { char *proxy = NULL; char *rmode = NULL; char *fmode = NULL; char *bmode = NULL; char *afname = NULL; char *space; bool choice; free(scriptinterpreter); scriptinterpreter = NULL; get_config_string(lookup_config(config_tree, "ScriptsInterpreter"), &scriptinterpreter); free(scriptextension); if(!get_config_string(lookup_config(config_tree, "ScriptsExtension"), &scriptextension)) #ifdef HAVE_MINGW scriptextension = xstrdup(".bat"); #else scriptextension = xstrdup(""); #endif get_config_string(lookup_config(config_tree, "Proxy"), &proxy); if(proxy) { if((space = strchr(proxy, ' '))) *space++ = 0; if(!strcasecmp(proxy, "none")) { proxytype = PROXY_NONE; } else if(!strcasecmp(proxy, "socks4")) { proxytype = PROXY_SOCKS4; } else if(!strcasecmp(proxy, "socks4a")) { proxytype = PROXY_SOCKS4A; } else if(!strcasecmp(proxy, "socks5")) { proxytype = PROXY_SOCKS5; } else if(!strcasecmp(proxy, "http")) { proxytype = PROXY_HTTP; } else if(!strcasecmp(proxy, "exec")) { proxytype = PROXY_EXEC; } else { logger(DEBUG_ALWAYS, LOG_ERR, "Unknown proxy type %s!", proxy); return false; } switch(proxytype) { case PROXY_NONE: default: break; case PROXY_EXEC: if(!space || !*space) { logger(DEBUG_ALWAYS, LOG_ERR, "Argument expected for proxy type exec!"); return false; } proxyhost = xstrdup(space); break; case PROXY_SOCKS4: case PROXY_SOCKS4A: case PROXY_SOCKS5: case PROXY_HTTP: proxyhost = space; if(space && (space = strchr(space, ' '))) *space++ = 0, proxyport = space; if(space && (space = strchr(space, ' '))) *space++ = 0, proxyuser = space; if(space && (space = strchr(space, ' '))) *space++ = 0, proxypass = space; if(!proxyhost || !*proxyhost || !proxyport || !*proxyport) { logger(DEBUG_ALWAYS, LOG_ERR, "Host and port argument expected for proxy!"); return false; } proxyhost = xstrdup(proxyhost); proxyport = xstrdup(proxyport); if(proxyuser && *proxyuser) proxyuser = xstrdup(proxyuser); if(proxypass && *proxypass) proxypass = xstrdup(proxypass); break; } free(proxy); } if(get_config_bool(lookup_config(config_tree, "IndirectData"), &choice) && choice) myself->options |= OPTION_INDIRECT; if(get_config_bool(lookup_config(config_tree, "TCPOnly"), &choice) && choice) myself->options |= OPTION_TCPONLY; if(myself->options & OPTION_TCPONLY) myself->options |= OPTION_INDIRECT; get_config_bool(lookup_config(config_tree, "DirectOnly"), &directonly); get_config_bool(lookup_config(config_tree, "LocalDiscovery"), &localdiscovery); if(get_config_string(lookup_config(config_tree, "Mode"), &rmode)) { if(!strcasecmp(rmode, "router")) routing_mode = RMODE_ROUTER; else if(!strcasecmp(rmode, "switch")) routing_mode = RMODE_SWITCH; else if(!strcasecmp(rmode, "hub")) routing_mode = RMODE_HUB; else { logger(DEBUG_ALWAYS, LOG_ERR, "Invalid routing mode!"); return false; } free(rmode); } if(get_config_string(lookup_config(config_tree, "Forwarding"), &fmode)) { if(!strcasecmp(fmode, "off")) forwarding_mode = FMODE_OFF; else if(!strcasecmp(fmode, "internal")) forwarding_mode = FMODE_INTERNAL; else if(!strcasecmp(fmode, "kernel")) forwarding_mode = FMODE_KERNEL; else { logger(DEBUG_ALWAYS, LOG_ERR, "Invalid forwarding mode!"); return false; } free(fmode); } choice = true; get_config_bool(lookup_config(config_tree, "PMTUDiscovery"), &choice); if(choice) myself->options |= OPTION_PMTU_DISCOVERY; choice = true; get_config_bool(lookup_config(config_tree, "ClampMSS"), &choice); if(choice) myself->options |= OPTION_CLAMP_MSS; get_config_bool(lookup_config(config_tree, "PriorityInheritance"), &priorityinheritance); get_config_bool(lookup_config(config_tree, "DecrementTTL"), &decrement_ttl); if(get_config_string(lookup_config(config_tree, "Broadcast"), &bmode)) { if(!strcasecmp(bmode, "no")) broadcast_mode = BMODE_NONE; else if(!strcasecmp(bmode, "yes") || !strcasecmp(bmode, "mst")) broadcast_mode = BMODE_MST; else if(!strcasecmp(bmode, "direct")) broadcast_mode = BMODE_DIRECT; else { logger(DEBUG_ALWAYS, LOG_ERR, "Invalid broadcast mode!"); return false; } free(bmode); } #if !defined(SOL_IP) || !defined(IP_TOS) if(priorityinheritance) logger(DEBUG_ALWAYS, LOG_WARNING, "%s not supported on this platform", "PriorityInheritance"); #endif if(!get_config_int(lookup_config(config_tree, "MACExpire"), &macexpire)) macexpire = 600; if(get_config_int(lookup_config(config_tree, "MaxTimeout"), &maxtimeout)) { if(maxtimeout <= 0) { logger(DEBUG_ALWAYS, LOG_ERR, "Bogus maximum timeout!"); return false; } } else maxtimeout = 900; if(get_config_string(lookup_config(config_tree, "AddressFamily"), &afname)) { if(!strcasecmp(afname, "IPv4")) addressfamily = AF_INET; else if(!strcasecmp(afname, "IPv6")) addressfamily = AF_INET6; else if(!strcasecmp(afname, "any")) addressfamily = AF_UNSPEC; else { logger(DEBUG_ALWAYS, LOG_ERR, "Invalid address family!"); return false; } free(afname); } get_config_bool(lookup_config(config_tree, "Hostnames"), &hostnames); if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime)) keylifetime = 3600; return true; } /* Configure node_t myself and set up the local sockets (listen only) */ static bool setup_myself(void) { char *name, *hostname, *cipher, *digest, *type; char *fname = NULL; char *address = NULL; if(!(name = get_name())) { logger(DEBUG_ALWAYS, LOG_ERR, "Name for tinc daemon required!"); return false; } myself = new_node(); myself->connection = new_connection(); myself->name = name; myself->connection->name = xstrdup(name); xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, name); read_config_options(config_tree, name); read_config_file(config_tree, fname); free(fname); if(!get_config_string(lookup_config(config_tree, "Port"), &myport)) myport = xstrdup("655"); xasprintf(&myself->hostname, "MYSELF port %s", myport); myself->connection->hostname = xstrdup(myself->hostname); myself->connection->options = 0; myself->connection->protocol_major = PROT_MAJOR; myself->connection->protocol_minor = PROT_MINOR; myself->options |= PROT_MINOR << 24; get_config_bool(lookup_config(config_tree, "ExperimentalProtocol"), &experimental); if(experimental && !read_ecdsa_private_key()) return false; if(!read_rsa_private_key()) return false; if(!atoi(myport)) { struct addrinfo *ai = str2addrinfo("localhost", myport, SOCK_DGRAM); sockaddr_t sa; if(!ai || !ai->ai_addr) return false; free(myport); memcpy(&sa, ai->ai_addr, ai->ai_addrlen); sockaddr2str(&sa, NULL, &myport); } /* Read in all the subnets specified in the host configuration file */ for(config_t *cfg = lookup_config(config_tree, "Subnet"); cfg; cfg = lookup_config_next(config_tree, cfg)) { subnet_t *subnet; if(!get_config_subnet(cfg, &subnet)) return false; subnet_add(myself, subnet); } /* Check some options */ if(!setup_myself_reloadable()) return false; get_config_bool(lookup_config(config_tree, "StrictSubnets"), &strictsubnets); get_config_bool(lookup_config(config_tree, "TunnelServer"), &tunnelserver); strictsubnets |= tunnelserver; if(get_config_int(lookup_config(config_tree, "UDPRcvBuf"), &udp_rcvbuf)) { if(udp_rcvbuf <= 0) { logger(DEBUG_ALWAYS, LOG_ERR, "UDPRcvBuf cannot be negative!"); return false; } } if(get_config_int(lookup_config(config_tree, "UDPSndBuf"), &udp_sndbuf)) { if(udp_sndbuf <= 0) { logger(DEBUG_ALWAYS, LOG_ERR, "UDPSndBuf cannot be negative!"); return false; } } int replaywin_int; if(get_config_int(lookup_config(config_tree, "ReplayWindow"), &replaywin_int)) { if(replaywin_int < 0) { logger(DEBUG_ALWAYS, LOG_ERR, "ReplayWindow cannot be negative!"); return false; } replaywin = (unsigned)replaywin_int; sptps_replaywin = replaywin; } /* Generate packet encryption key */ if(!get_config_string(lookup_config(config_tree, "Cipher"), &cipher)) cipher = xstrdup("blowfish"); if(!cipher_open_by_name(&myself->incipher, cipher)) { logger(DEBUG_ALWAYS, LOG_ERR, "Unrecognized cipher type!"); return false; } free(cipher); regenerate_key(); /* Check if we want to use message authentication codes... */ int maclength = 4; get_config_int(lookup_config(config_tree, "MACLength"), &maclength); if(maclength < 0) { logger(DEBUG_ALWAYS, LOG_ERR, "Bogus MAC length!"); return false; } if(!get_config_string(lookup_config(config_tree, "Digest"), &digest)) digest = xstrdup("sha1"); if(!digest_open_by_name(&myself->indigest, digest, maclength)) { logger(DEBUG_ALWAYS, LOG_ERR, "Unrecognized digest type!"); return false; } free(digest); /* Compression */ if(get_config_int(lookup_config(config_tree, "Compression"), &myself->incompression)) { if(myself->incompression < 0 || myself->incompression > 11) { logger(DEBUG_ALWAYS, LOG_ERR, "Bogus compression level!"); return false; } } else myself->incompression = 0; myself->connection->outcompression = 0; /* Done */ myself->nexthop = myself; myself->via = myself; myself->status.reachable = true; myself->last_state_change = time(NULL); myself->status.sptps = experimental; node_add(myself); graph(); if(strictsubnets) load_all_subnets(); /* Open device */ devops = os_devops; if(get_config_string(lookup_config(config_tree, "DeviceType"), &type)) { if(!strcasecmp(type, "dummy")) devops = dummy_devops; else if(!strcasecmp(type, "raw_socket")) devops = raw_socket_devops; else if(!strcasecmp(type, "multicast")) devops = multicast_devops; #ifdef ENABLE_UML else if(!strcasecmp(type, "uml")) devops = uml_devops; #endif #ifdef ENABLE_VDE else if(!strcasecmp(type, "vde")) devops = vde_devops; #endif } if(!devops.setup()) return false; if(device_fd >= 0) { event_set(&device_ev, device_fd, EV_READ|EV_PERSIST, handle_device_data, NULL); if (event_add(&device_ev, NULL) < 0) { logger(DEBUG_ALWAYS, LOG_ERR, "event_add failed: %s", strerror(errno)); devops.close(); return false; } } /* Run tinc-up script to further initialize the tap interface */ char *envp[5]; xasprintf(&envp[0], "NETNAME=%s", netname ? : ""); xasprintf(&envp[1], "DEVICE=%s", device ? : ""); xasprintf(&envp[2], "INTERFACE=%s", iface ? : ""); xasprintf(&envp[3], "NAME=%s", myself->name); envp[4] = NULL; execute_script("tinc-up", envp); for(int i = 0; i < 4; i++) free(envp[i]); /* Run subnet-up scripts for our own subnets */ subnet_update(myself, NULL, true); /* Open sockets */ if(!do_detach && getenv("LISTEN_FDS")) { sockaddr_t sa; socklen_t salen; listen_sockets = atoi(getenv("LISTEN_FDS")); #ifdef HAVE_UNSETENV unsetenv("LISTEN_FDS"); #endif if(listen_sockets > MAXSOCKETS) { logger(DEBUG_ALWAYS, LOG_ERR, "Too many listening sockets"); return false; } for(int i = 0; i < listen_sockets; i++) { salen = sizeof sa; if(getsockname(i + 3, &sa.sa, &salen) < 0) { logger(DEBUG_ALWAYS, LOG_ERR, "Could not get address of listen fd %d: %s", i + 3, sockstrerror(errno)); return false; } listen_socket[i].tcp = i + 3; #ifdef FD_CLOEXEC fcntl(i + 3, F_SETFD, FD_CLOEXEC); #endif listen_socket[i].udp = setup_vpn_in_socket(&sa); if(listen_socket[i].udp < 0) return false; event_set(&listen_socket[i].ev_tcp, listen_socket[i].tcp, EV_READ|EV_PERSIST, handle_new_meta_connection, NULL); if(event_add(&listen_socket[i].ev_tcp, NULL) < 0) { logger(DEBUG_ALWAYS, LOG_ERR, "event_add failed: %s", strerror(errno)); abort(); } event_set(&listen_socket[i].ev_udp, listen_socket[i].udp, EV_READ|EV_PERSIST, handle_incoming_vpn_data, (void *)(intptr_t)listen_sockets); if(event_add(&listen_socket[listen_sockets].ev_udp, NULL) < 0) { logger(DEBUG_ALWAYS, LOG_ERR, "event_add failed: %s", strerror(errno)); abort(); } if(debug_level >= DEBUG_CONNECTIONS) { hostname = sockaddr2hostname(&sa); logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Listening on %s", hostname); free(hostname); } memcpy(&listen_socket[i].sa, &sa, salen); } } else { listen_sockets = 0; config_t *cfg = lookup_config(config_tree, "BindToAddress"); do { get_config_string(cfg, &address); if(cfg) cfg = lookup_config_next(config_tree, cfg); char *port = myport; if(address) { char *space = strchr(address, ' '); if(space) { *space++ = 0; port = space; } if(!strcmp(address, "*")) *address = 0; } struct addrinfo *ai, hint = {0}; hint.ai_family = addressfamily; hint.ai_socktype = SOCK_STREAM; hint.ai_protocol = IPPROTO_TCP; hint.ai_flags = AI_PASSIVE; int err = getaddrinfo(address && *address ? address : NULL, port, &hint, &ai); free(address); if(err || !ai) { logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "getaddrinfo", gai_strerror(err)); return false; } for(struct addrinfo *aip = ai; aip; aip = aip->ai_next) { if(listen_sockets >= MAXSOCKETS) { logger(DEBUG_ALWAYS, LOG_ERR, "Too many listening sockets"); return false; } listen_socket[listen_sockets].tcp = setup_listen_socket((sockaddr_t *) aip->ai_addr); if(listen_socket[listen_sockets].tcp < 0) continue; listen_socket[listen_sockets].udp = setup_vpn_in_socket((sockaddr_t *) aip->ai_addr); if(listen_socket[listen_sockets].udp < 0) { close(listen_socket[listen_sockets].tcp); continue; } event_set(&listen_socket[listen_sockets].ev_tcp, listen_socket[listen_sockets].tcp, EV_READ|EV_PERSIST, handle_new_meta_connection, NULL); if(event_add(&listen_socket[listen_sockets].ev_tcp, NULL) < 0) { logger(DEBUG_ALWAYS, LOG_ERR, "event_add failed: %s", strerror(errno)); abort(); } event_set(&listen_socket[listen_sockets].ev_udp, listen_socket[listen_sockets].udp, EV_READ|EV_PERSIST, handle_incoming_vpn_data, (void *)(intptr_t)listen_sockets); if(event_add(&listen_socket[listen_sockets].ev_udp, NULL) < 0) { logger(DEBUG_ALWAYS, LOG_ERR, "event_add failed: %s", strerror(errno)); abort(); } if(debug_level >= DEBUG_CONNECTIONS) { hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr); logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Listening on %s", hostname); free(hostname); } memcpy(&listen_socket[listen_sockets].sa, aip->ai_addr, aip->ai_addrlen); listen_sockets++; } freeaddrinfo(ai); } while(cfg); } if(listen_sockets) logger(DEBUG_ALWAYS, LOG_NOTICE, "Ready"); else { logger(DEBUG_ALWAYS, LOG_ERR, "Unable to create any listening socket!"); return false; } last_config_check = time(NULL); return true; } /* initialize network */ bool setup_network(void) { init_connections(); init_subnets(); init_nodes(); init_edges(); init_requests(); if(get_config_int(lookup_config(config_tree, "PingInterval"), &pinginterval)) { if(pinginterval < 1) { pinginterval = 86400; } } else pinginterval = 60; if(!get_config_int(lookup_config(config_tree, "PingTimeout"), &pingtimeout)) pingtimeout = 5; if(pingtimeout < 1 || pingtimeout > pinginterval) pingtimeout = pinginterval; if(!get_config_int(lookup_config(config_tree, "MaxOutputBufferSize"), &maxoutbufsize)) maxoutbufsize = 10 * MTU; if(!setup_myself()) return false; return true; } /* close all open network connections */ void close_network_connections(void) { for(list_node_t *node = connection_list->head, *next; node; node = next) { next = node->next; connection_t *c = node->data; /* Keep control connections open until the end, so they know when we really terminated */ if(c->status.control) c->socket = -1; c->outgoing = NULL; terminate_connection(c, false); } list_delete_list(outgoing_list); if(myself && myself->connection) { subnet_update(myself, NULL, false); terminate_connection(myself->connection, false); free_connection(myself->connection); } for(int i = 0; i < listen_sockets; i++) { event_del(&listen_socket[i].ev_tcp); event_del(&listen_socket[i].ev_udp); close(listen_socket[i].tcp); close(listen_socket[i].udp); } char *envp[5]; xasprintf(&envp[0], "NETNAME=%s", netname ? : ""); xasprintf(&envp[1], "DEVICE=%s", device ? : ""); xasprintf(&envp[2], "INTERFACE=%s", iface ? : ""); xasprintf(&envp[3], "NAME=%s", myself->name); envp[4] = NULL; exit_requests(); exit_edges(); exit_subnets(); exit_nodes(); exit_connections(); execute_script("tinc-down", envp); if(myport) free(myport); for(int i = 0; i < 4; i++) free(envp[i]); devops.close(); return; }