X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fnet_setup.c;h=83fbc2da38a92228b164f60bd83c96a03277378d;hp=98e6ece24397fa823daa4e33d8f2cf33b2b4ac52;hb=76a9be5bce43a1a7363c670882f5315c824c903c;hpb=be1446f5d0e8831b60ea473a5b7b9ba40f18986e diff --git a/src/net_setup.c b/src/net_setup.c index 98e6ece2..83fbc2da 100644 --- a/src/net_setup.c +++ b/src/net_setup.c @@ -1,7 +1,7 @@ /* net_setup.c -- Setup. Copyright (C) 1998-2005 Ivo Timmermans, - 2000-2013 Guus Sliepen + 2000-2014 Guus Sliepen 2006 Scott Lamb 2010 Brandon Black @@ -44,15 +44,17 @@ #include "xalloc.h" char *myport; +static char *myname; static io_t device_io; devops_t devops; +bool device_standby = false; char *proxyhost; char *proxyport; char *proxyuser; char *proxypass; proxytype_t proxytype; -int autoconnect; +bool autoconnect; bool disablebuggypeers; char *scriptinterpreter; @@ -71,17 +73,17 @@ bool node_read_ecdsa_public_key(node_t *n) { if(!read_host_config(config_tree, n->name)) goto exit; - /* First, check for simple ECDSAPublicKey statement */ + /* First, check for simple Ed25519PublicKey statement */ - if(get_config_string(lookup_config(config_tree, "ECDSAPublicKey"), &p)) { + if(get_config_string(lookup_config(config_tree, "Ed25519PublicKey"), &p)) { n->ecdsa = ecdsa_set_base64_public_key(p); free(p); goto exit; } - /* Else, check for ECDSAPublicKeyFile statement and read it */ + /* Else, check for Ed25519PublicKeyFile statement and read it */ - if(!get_config_string(lookup_config(config_tree, "ECDSAPublicKeyFile"), &pubname)) + if(!get_config_string(lookup_config(config_tree, "Ed25519PublicKeyFile"), &pubname)) xasprintf(&pubname, "%s" SLASH "hosts" SLASH "%s", confbase, n->name); fp = fopen(pubname, "r"); @@ -112,37 +114,39 @@ bool read_ecdsa_public_key(connection_t *c) { return false; } - /* First, check for simple ECDSAPublicKey statement */ + /* First, check for simple Ed25519PublicKey statement */ - if(get_config_string(lookup_config(c->config_tree, "ECDSAPublicKey"), &p)) { + if(get_config_string(lookup_config(c->config_tree, "Ed25519PublicKey"), &p)) { c->ecdsa = ecdsa_set_base64_public_key(p); free(p); return c->ecdsa; } - /* Else, check for ECDSAPublicKeyFile statement and read it */ + /* Else, check for Ed25519PublicKeyFile statement and read it */ - if(!get_config_string(lookup_config(c->config_tree, "ECDSAPublicKeyFile"), &fname)) + if(!get_config_string(lookup_config(c->config_tree, "Ed25519PublicKeyFile"), &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", + logger(DEBUG_ALWAYS, LOG_ERR, "Error reading Ed25519 public key file `%s': %s", fname, strerror(errno)); free(fname); return false; } c->ecdsa = ecdsa_read_pem_public_key(fp); - fclose(fp); - if(!c->ecdsa) - logger(DEBUG_ALWAYS, LOG_ERR, "Parsing ECDSA public key file `%s' failed.", fname); + if(!c->ecdsa && errno != ENOENT) + logger(DEBUG_ALWAYS, LOG_ERR, "Parsing Ed25519 public key file `%s' failed.", fname); + + fclose(fp); free(fname); return c->ecdsa; } +#ifndef DISABLE_LEGACY bool read_rsa_public_key(connection_t *c) { if(ecdsa_active(c->ecdsa)) return true; @@ -180,6 +184,7 @@ bool read_rsa_public_key(connection_t *c) { free(fname); return c->rsa; } +#endif static bool read_ecdsa_private_key(void) { FILE *fp; @@ -187,15 +192,15 @@ static bool read_ecdsa_private_key(void) { /* 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); + if(!get_config_string(lookup_config(config_tree, "Ed25519PrivateKeyFile"), &fname)) + xasprintf(&fname, "%s" SLASH "ed25519_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)); + logger(DEBUG_ALWAYS, LOG_ERR, "Error reading Ed25519 private key file `%s': %s", fname, strerror(errno)); if(errno == ENOENT) - logger(DEBUG_ALWAYS, LOG_INFO, "Create an ECDSA keypair with `tinc -n %s generate-ecdsa-keys'.", netname ?: "."); + logger(DEBUG_ALWAYS, LOG_INFO, "Create an Ed25519 keypair with `tinc -n %s generate-ed25519-keys'.", netname ?: "."); free(fname); return false; } @@ -204,20 +209,20 @@ static bool read_ecdsa_private_key(void) { 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)); + logger(DEBUG_ALWAYS, LOG_ERR, "Could not stat Ed25519 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); + logger(DEBUG_ALWAYS, LOG_WARNING, "Warning: insecure file permissions for Ed25519 private key file `%s'!", fname); #endif myself->connection->ecdsa = ecdsa_read_pem_private_key(fp); fclose(fp); if(!myself->connection->ecdsa) - logger(DEBUG_ALWAYS, LOG_ERR, "Reading ECDSA private key file `%s' failed: %s", fname, strerror(errno)); + logger(DEBUG_ALWAYS, LOG_ERR, "Reading Ed25519 private key file `%s' failed", fname); free(fname); return myself->connection->ecdsa; } @@ -231,7 +236,7 @@ static bool read_invitation_key(void) { invitation_key = NULL; } - xasprintf(&fname, "%s" SLASH "invitations" SLASH "ecdsa_key.priv", confbase); + xasprintf(&fname, "%s" SLASH "invitations" SLASH "ed25519_key.priv", confbase); fp = fopen(fname, "r"); @@ -239,13 +244,14 @@ static bool read_invitation_key(void) { invitation_key = ecdsa_read_pem_private_key(fp); fclose(fp); if(!invitation_key) - logger(DEBUG_ALWAYS, LOG_ERR, "Reading ECDSA private key file `%s' failed: %s", fname, strerror(errno)); + logger(DEBUG_ALWAYS, LOG_ERR, "Reading Ed25519 private key file `%s' failed", fname); } free(fname); return invitation_key; } +#ifndef DISABLE_LEGACY static bool read_rsa_private_key(void) { FILE *fp; char *fname; @@ -275,6 +281,8 @@ static bool read_rsa_private_key(void) { if(!fp) { logger(DEBUG_ALWAYS, LOG_ERR, "Error reading RSA private key file `%s': %s", fname, strerror(errno)); + if(errno == ENOENT) + logger(DEBUG_ALWAYS, LOG_INFO, "Create an RSA keypair with `tinc -n %s generate-rsa-keys'.", netname ?: "."); free(fname); return false; } @@ -300,6 +308,7 @@ static bool read_rsa_private_key(void) { free(fname); return myself->connection->rsa; } +#endif static timeout_t keyexpire_timeout; @@ -311,6 +320,8 @@ static void keyexpire_handler(void *data) { void regenerate_key(void) { logger(DEBUG_STATUS, LOG_INFO, "Expiring symmetric keys"); send_key_changed(); + for splay_each(node_t, n, node_tree) + n->status.validkey_in = false; } /* @@ -401,41 +412,16 @@ void load_all_nodes(void) { char *get_name(void) { char *name = NULL; + char *returned_name; get_config_string(lookup_config(config_tree, "Name"), &name); if(!name) return NULL; - if(*name == '$') { - char *envname = getenv(name + 1); - char hostname[32] = ""; - 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; - } - if(gethostname(hostname, sizeof hostname) || !*hostname) { - logger(DEBUG_ALWAYS, LOG_ERR, "Could not get hostname: %s\n", strerror(errno)); - return false; - } - hostname[31] = 0; - envname = hostname; - } - 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; + returned_name = replace_name(name); + free(name); + return returned_name; } bool setup_myself_reloadable(void) { @@ -444,7 +430,6 @@ bool setup_myself_reloadable(void) { char *fmode = NULL; char *bmode = NULL; char *afname = NULL; - char *address = NULL; char *space; bool choice; @@ -528,18 +513,16 @@ bool setup_myself_reloadable(void) { 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); + get_config_bool(lookup_config(config_tree, "UDPDiscovery"), &udp_discovery); + get_config_int(lookup_config(config_tree, "UDPDiscoveryKeepaliveInterval"), &udp_discovery_keepalive_interval); + get_config_int(lookup_config(config_tree, "UDPDiscoveryInterval"), &udp_discovery_interval); + get_config_int(lookup_config(config_tree, "UDPDiscoveryTimeout"), &udp_discovery_timeout); - memset(&localdiscovery_address, 0, sizeof localdiscovery_address); - if(get_config_string(lookup_config(config_tree, "LocalDiscoveryAddress"), &address)) { - struct addrinfo *ai = str2addrinfo(address, myport, SOCK_DGRAM); - free(address); - if(!ai) - return false; - memcpy(&localdiscovery_address, ai->ai_addr, ai->ai_addrlen); - } + get_config_int(lookup_config(config_tree, "MTUInfoInterval"), &mtu_info_interval); + get_config_int(lookup_config(config_tree, "UDPInfoInterval"), &udp_info_interval); + 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")) @@ -595,6 +578,20 @@ bool setup_myself_reloadable(void) { free(bmode); } + const char* const DEFAULT_BROADCAST_SUBNETS[] = { "ff:ff:ff:ff:ff:ff", "255.255.255.255", "224.0.0.0/4", "ff00::/8" }; + for (size_t i = 0; i < sizeof(DEFAULT_BROADCAST_SUBNETS) / sizeof(*DEFAULT_BROADCAST_SUBNETS); i++) { + subnet_t *s = new_subnet(); + if (!str2net(s, DEFAULT_BROADCAST_SUBNETS[i])) + abort(); + subnet_add(NULL, s); + } + for (config_t* cfg = lookup_config(config_tree, "BroadcastSubnet"); cfg; cfg = lookup_config_next(config_tree, cfg)) { + subnet_t *s; + if (!get_config_subnet(cfg, &s)) + continue; + subnet_add(NULL, s); + } + #if !defined(SOL_IP) || !defined(IP_TOS) if(priorityinheritance) logger(DEBUG_ALWAYS, LOG_WARNING, "%s not supported on this platform", "PriorityInheritance"); @@ -630,9 +627,15 @@ bool setup_myself_reloadable(void) { if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime)) keylifetime = 3600; - get_config_int(lookup_config(config_tree, "AutoConnect"), &autoconnect); - if(autoconnect < 0) - autoconnect = 0; + config_t *cfg = lookup_config(config_tree, "AutoConnect"); + if(cfg) { + if(!get_config_bool(cfg, &autoconnect)) { + // Some backwards compatibility with when this option was an int + int val = 0; + get_config_int(cfg, &val); + autoconnect = val; + } + } get_config_bool(lookup_config(config_tree, "DisableBuggyPeers"), &disablebuggypeers); @@ -641,6 +644,122 @@ bool setup_myself_reloadable(void) { return true; } +/* + Add listening sockets. +*/ +static bool add_listen_address(char *address, bool bindto) { + 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; + +#ifdef HAVE_DECL_RES_INIT + res_init(); +#endif + 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", err == EAI_SYSTEM ? strerror(err) : gai_strerror(err)); + return false; + } + + for(struct addrinfo *aip = ai; aip; aip = aip->ai_next) { + // Ignore duplicate addresses + bool found = false; + + for(int i = 0; i < listen_sockets; i++) + if(!memcmp(&listen_socket[i].sa, aip->ai_addr, aip->ai_addrlen)) { + found = true; + break; + } + + if(found) + continue; + + if(listen_sockets >= MAXSOCKETS) { + logger(DEBUG_ALWAYS, LOG_ERR, "Too many listening sockets"); + return false; + } + + int tcp_fd = setup_listen_socket((sockaddr_t *) aip->ai_addr); + + if(tcp_fd < 0) + continue; + + int udp_fd = setup_vpn_in_socket((sockaddr_t *) aip->ai_addr); + + if(tcp_fd < 0) { + close(tcp_fd); + continue; + } + + io_add(&listen_socket[listen_sockets].tcp, handle_new_meta_connection, &listen_socket[listen_sockets], tcp_fd, IO_READ); + io_add(&listen_socket[listen_sockets].udp, handle_incoming_vpn_data, &listen_socket[listen_sockets], udp_fd, IO_READ); + + if(debug_level >= DEBUG_CONNECTIONS) { + char *hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr); + logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Listening on %s", hostname); + free(hostname); + } + + listen_socket[listen_sockets].bindto = bindto; + memcpy(&listen_socket[listen_sockets].sa, aip->ai_addr, aip->ai_addrlen); + listen_sockets++; + } + + freeaddrinfo(ai); + return true; +} + +void device_enable(void) { + if (devops.enable) + devops.enable(); + + /* Run tinc-up script to further initialize the tap interface */ + + char *envp[5] = {NULL}; + xasprintf(&envp[0], "NETNAME=%s", netname ? : ""); + xasprintf(&envp[1], "DEVICE=%s", device ? : ""); + xasprintf(&envp[2], "INTERFACE=%s", iface ? : ""); + xasprintf(&envp[3], "NAME=%s", myname); + + execute_script("tinc-up", envp); + + for(int i = 0; i < 4; i++) + free(envp[i]); +} + +void device_disable(void) { + char *envp[5] = {NULL}; + xasprintf(&envp[0], "NETNAME=%s", netname ? : ""); + xasprintf(&envp[1], "DEVICE=%s", device ? : ""); + xasprintf(&envp[2], "INTERFACE=%s", iface ? : ""); + xasprintf(&envp[3], "NAME=%s", myname); + + execute_script("tinc-down", envp); + + for(int i = 0; i < 4; i++) + free(envp[i]); + + if (devops.disable) + devops.disable(); +} + /* Configure node_t myself and set up the local sockets (listen only) */ @@ -654,6 +773,7 @@ static bool setup_myself(void) { return false; } + myname = xstrdup(name); myself = new_node(); myself->connection = new_connection(); myself->name = name; @@ -671,16 +791,31 @@ static bool setup_myself(void) { myself->options |= PROT_MINOR << 24; +#ifdef DISABLE_LEGACY + experimental = read_ecdsa_private_key(); + if(!experimental) { + logger(DEBUG_ALWAYS, LOG_ERR, "No private key available, cannot start tinc!"); + return false; + } +#else if(!get_config_bool(lookup_config(config_tree, "ExperimentalProtocol"), &experimental)) { experimental = read_ecdsa_private_key(); - logger(DEBUG_ALWAYS, LOG_WARNING, "Support for SPTPS disabled."); + if(!experimental) + logger(DEBUG_ALWAYS, LOG_WARNING, "Support for SPTPS disabled."); } else { if(experimental && !read_ecdsa_private_key()) return false; } - if(!read_rsa_private_key()) - return false; + if(!read_rsa_private_key()) { + if(experimental) { + logger(DEBUG_ALWAYS, LOG_WARNING, "Support for legacy protocol disabled."); + } else { + logger(DEBUG_ALWAYS, LOG_ERR, "No private keys available, cannot start tinc!"); + return false; + } + } +#endif /* Ensure myport is numeric */ @@ -745,6 +880,7 @@ static bool setup_myself(void) { sptps_replaywin = replaywin; } +#ifndef DISABLE_LEGACY /* Generate packet encryption key */ if(!get_config_string(lookup_config(config_tree, "Cipher"), &cipher)) @@ -782,6 +918,7 @@ static bool setup_myself(void) { } free(digest); +#endif /* Compression */ @@ -832,6 +969,8 @@ static bool setup_myself(void) { #endif } + get_config_bool(lookup_config(config_tree, "DeviceStandby"), &device_standby); + if(!devops.setup()) return false; @@ -857,7 +996,7 @@ static bool setup_myself(void) { 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)); + logger(DEBUG_ALWAYS, LOG_ERR, "Could not get address of listen fd %d: %s", i + 3, sockstrerror(sockerrno)); return false; } @@ -882,73 +1021,25 @@ static bool setup_myself(void) { } } else { listen_sockets = 0; - config_t *cfg = lookup_config(config_tree, "BindToAddress"); + int cfgs = 0; - do { + for(config_t *cfg = lookup_config(config_tree, "BindToAddress"); cfg; cfg = lookup_config_next(config_tree, cfg)) { + cfgs++; 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", err == EAI_SYSTEM ? strerror(err) : gai_strerror(err)); + if(!add_listen_address(address, true)) 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; - } - - int tcp_fd = setup_listen_socket((sockaddr_t *) aip->ai_addr); - - if(tcp_fd < 0) - continue; - - int udp_fd = setup_vpn_in_socket((sockaddr_t *) aip->ai_addr); - - if(tcp_fd < 0) { - close(tcp_fd); - continue; - } - - io_add(&listen_socket[listen_sockets].tcp, handle_new_meta_connection, &listen_socket[listen_sockets], tcp_fd, IO_READ); - io_add(&listen_socket[listen_sockets].udp, handle_incoming_vpn_data, &listen_socket[listen_sockets], udp_fd, IO_READ); - - 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++; - } + for(config_t *cfg = lookup_config(config_tree, "ListenAddress"); cfg; cfg = lookup_config_next(config_tree, cfg)) { + cfgs++; + get_config_string(cfg, &address); + if(!add_listen_address(address, false)) + return false; + } - freeaddrinfo(ai); - } while(cfg); + if(!cfgs) + if(!add_listen_address(address, NULL)) + return false; } if(!listen_sockets) { @@ -958,7 +1049,7 @@ static bool setup_myself(void) { /* If no Port option was specified, set myport to the port used by the first listening socket. */ - if(!port_specified) { + if(!port_specified || atoi(myport) == 0) { sockaddr_t sa; socklen_t salen = sizeof sa; if(!getsockname(listen_socket[0].udp.fd, &sa.sa, &salen)) { @@ -1010,18 +1101,8 @@ bool setup_network(void) { if(!init_control()) return false; - /* Run tinc-up script to further initialize the tap interface */ - - char *envp[5] = {NULL}; - 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); - - execute_script("tinc-up", envp); - - for(int i = 0; i < 4; i++) - free(envp[i]); + if (!device_standby) + device_enable(); /* Run subnet-up scripts for our own subnets */ @@ -1044,7 +1125,8 @@ void close_network_connections(void) { terminate_connection(c, false); } - list_delete_list(outgoing_list); + if(outgoing_list) + list_delete_list(outgoing_list); if(myself && myself->connection) { subnet_update(myself, NULL, false); @@ -1059,28 +1141,27 @@ void close_network_connections(void) { close(listen_socket[i].udp.fd); } - char *envp[5] = {NULL}; - 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); - exit_requests(); exit_edges(); exit_subnets(); exit_nodes(); exit_connections(); - execute_script("tinc-down", envp); + if (!device_standby) + device_disable(); - if(myport) free(myport); + free(myport); - for(int i = 0; i < 4; i++) - free(envp[i]); - - devops.close(); + if (device_fd >= 0) + io_del(&device_io); + if (devops.close) + devops.close(); exit_control(); + free(myname); + free(scriptextension); + free(scriptinterpreter); + return; }