X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fnet_setup.c;h=17675aec40ace0b3f8d775875c54321961206e55;hp=cb14c5179fb3489c37e3a05abf16a166becf78ae;hb=92d66492e0824674f68d26e787dd1ba4444a4601;hpb=fc119fb0096a9221f2cff279b07c886bcd794d28 diff --git a/src/net_setup.c b/src/net_setup.c index cb14c517..17675aec 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 + 2000-2017 Guus Sliepen 2006 Scott Lamb 2010 Brandon Black @@ -38,28 +38,35 @@ #include "protocol.h" #include "route.h" #include "rsa.h" +#include "script.h" #include "subnet.h" #include "utils.h" #include "xalloc.h" +#ifdef HAVE_MINIUPNPC +#include "upnp.h" +#endif + char *myport; 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; char *scriptextension; bool node_read_ecdsa_public_key(node_t *n) { - if(ecdsa_active(n->ecdsa)) + if(ecdsa_active(n->ecdsa)) { return true; + } splay_tree_t *config_tree; FILE *fp; @@ -67,26 +74,28 @@ bool node_read_ecdsa_public_key(node_t *n) { char *p; init_configuration(&config_tree); - if(!read_host_config(config_tree, n->name)) + + if(!read_host_config(config_tree, n->name, true)) { 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"); if(!fp) { - logger(DEBUG_ALWAYS, LOG_ERR, "Error reading ECDSA public key file `%s': %s", pubname, strerror(errno)); goto exit; } @@ -100,8 +109,9 @@ exit: } bool read_ecdsa_public_key(connection_t *c) { - if(ecdsa_active(c->ecdsa)) + if(ecdsa_active(c->ecdsa)) { return true; + } FILE *fp; char *fname; @@ -109,45 +119,48 @@ bool read_ecdsa_public_key(connection_t *c) { if(!c->config_tree) { init_configuration(&c->config_tree); - if(!read_host_config(c->config_tree, c->name)) + + if(!read_host_config(c->config_tree, c->name, true)) { 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", - fname, strerror(errno)); + 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; - FILE *fp; char *fname; char *n; @@ -162,8 +175,9 @@ bool read_rsa_public_key(connection_t *c) { /* Else, check for PublicKeyFile statement and read it */ - if(!get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &fname)) + 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"); @@ -176,11 +190,14 @@ bool read_rsa_public_key(connection_t *c) { c->rsa = rsa_read_pem_public_key(fp); fclose(fp); - if(!c->rsa) + if(!c->rsa) { logger(DEBUG_ALWAYS, LOG_ERR, "Reading RSA public key file `%s' failed: %s", fname, strerror(errno)); + } + free(fname); return c->rsa; } +#endif static bool read_ecdsa_private_key(void) { FILE *fp; @@ -188,15 +205,19 @@ 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)); - if(errno == ENOENT) - logger(DEBUG_ALWAYS, LOG_INFO, "Create an ECDSA keypair with `tinc -n %s generate-ecdsa-keys'.", netname ?: "."); + 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 Ed25519 keypair with `tinc -n %s generate-ed25519-keys'.", netname ? : "."); + } + free(fname); return false; } @@ -205,24 +226,54 @@ 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); + if(s.st_mode & ~0100700) { + 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)); + if(!myself->connection->ecdsa) { + logger(DEBUG_ALWAYS, LOG_ERR, "Reading Ed25519 private key file `%s' failed", fname); + } + free(fname); return myself->connection->ecdsa; } +static bool read_invitation_key(void) { + FILE *fp; + char fname[PATH_MAX]; + + if(invitation_key) { + ecdsa_free(invitation_key); + invitation_key = NULL; + } + + snprintf(fname, sizeof(fname), "%s" SLASH "invitations" SLASH "ed25519_key.priv", confbase); + + fp = fopen(fname, "r"); + + if(fp) { + invitation_key = ecdsa_read_pem_private_key(fp); + fclose(fp); + + if(!invitation_key) { + logger(DEBUG_ALWAYS, LOG_ERR, "Reading Ed25519 private key file `%s' failed", fname); + } + } + + return invitation_key; +} + +#ifndef DISABLE_LEGACY static bool read_rsa_private_key(void) { FILE *fp; char *fname; @@ -236,6 +287,7 @@ static bool read_rsa_private_key(void) { free(d); return false; } + myself->connection->rsa = rsa_set_hex_private_key(n, "FFFF", d); free(n); free(d); @@ -244,14 +296,20 @@ static bool read_rsa_private_key(void) { /* Else, check for PrivateKeyFile statement and read it */ - if(!get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname)) + 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)); + 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; } @@ -265,61 +323,66 @@ static bool read_rsa_private_key(void) { return false; } - if(s.st_mode & ~0100700) + if(s.st_mode & ~0100700) { logger(DEBUG_ALWAYS, LOG_WARNING, "Warning: insecure file permissions for RSA private key file `%s'!", fname); + } + #endif myself->connection->rsa = rsa_read_pem_private_key(fp); fclose(fp); - if(!myself->connection->rsa) + if(!myself->connection->rsa) { logger(DEBUG_ALWAYS, LOG_ERR, "Reading RSA private key file `%s' failed: %s", fname, strerror(errno)); + } + free(fname); return myself->connection->rsa; } +#endif static timeout_t keyexpire_timeout; static void keyexpire_handler(void *data) { regenerate_key(); - timeout_set(data, &(struct timeval){keylifetime, rand() % 100000}); + timeout_set(data, &(struct timeval) { + keylifetime, rand() % 100000 + }); } 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; + } } -/* - Read Subnets from all host config files -*/ -void load_all_subnets(void) { +void load_all_nodes(void) { DIR *dir; struct dirent *ent; - char *dname; + char dname[PATH_MAX]; - xasprintf(&dname, "%s" SLASH "hosts", confbase); + snprintf(dname, sizeof(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)) + 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 splay_tree_t *config_tree; init_configuration(&config_tree); read_config_options(config_tree, ent->d_name); - read_host_config(config_tree, ent->d_name); + read_host_config(config_tree, ent->d_name, true); if(!n) { n = new_node(); @@ -327,91 +390,46 @@ void load_all_subnets(void) { 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(strictsubnets) { + 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(!get_config_subnet(cfg, &s)) { + continue; + } - if((s2 = lookup_subnet(n, s))) { - s2->expires = -1; - } else { - subnet_add(n, s); + if((s2 = lookup_subnet(n, s))) { + s2->expires = -1; + free(s); + } else { + subnet_add(n, s); + } } } - exit_configuration(&config_tree); - } - - closedir(dir); -} - -void load_all_nodes(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); - if(n) - continue; + if(lookup_config(config_tree, "Address")) { + n->status.has_address = true; + } - n = new_node(); - n->name = xstrdup(ent->d_name); - node_add(n); + exit_configuration(&config_tree); } closedir(dir); } - char *get_name(void) { char *name = NULL; + char *returned_name; get_config_string(lookup_config(config_tree, "Name"), &name); - if(!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; - } - char envname[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; + returned_name = replace_name(name); + free(name); + return returned_name; } bool setup_myself_reloadable(void) { @@ -429,17 +447,17 @@ bool setup_myself_reloadable(void) { free(scriptextension); - if(!get_config_string(lookup_config(config_tree, "ScriptsExtension"), &scriptextension)) -#ifdef HAVE_MINGW - scriptextension = xstrdup(".bat"); -#else + + if(!get_config_string(lookup_config(config_tree, "ScriptsExtension"), &scriptextension)) { scriptextension = xstrdup(""); -#endif + } get_config_string(lookup_config(config_tree, "Proxy"), &proxy); + if(proxy) { - if((space = strchr(proxy, ' '))) + if((space = strchr(proxy, ' '))) { *space++ = 0; + } if(!strcasecmp(proxy, "none")) { proxytype = PROXY_NONE; @@ -459,176 +477,379 @@ bool setup_myself_reloadable(void) { } switch(proxytype) { - case PROXY_NONE: - default: - break; + 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_EXEC: + if(!space || !*space) { + logger(DEBUG_ALWAYS, LOG_ERR, "Argument expected for proxy type exec!"); + return false; + } - 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; + 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) + 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) + if(get_config_bool(lookup_config(config_tree, "TCPOnly"), &choice) && choice) { myself->options |= OPTION_TCPONLY; + } - if(myself->options & OPTION_TCPONLY) + if(myself->options & OPTION_TCPONLY) { myself->options |= OPTION_INDIRECT; + } + + 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); + + 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")) + if(!strcasecmp(rmode, "router")) { routing_mode = RMODE_ROUTER; - else if(!strcasecmp(rmode, "switch")) + } else if(!strcasecmp(rmode, "switch")) { routing_mode = RMODE_SWITCH; - else if(!strcasecmp(rmode, "hub")) + } else if(!strcasecmp(rmode, "hub")) { routing_mode = RMODE_HUB; - else { + } 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")) + if(!strcasecmp(fmode, "off")) { forwarding_mode = FMODE_OFF; - else if(!strcasecmp(fmode, "internal")) + } else if(!strcasecmp(fmode, "internal")) { forwarding_mode = FMODE_INTERNAL; - else if(!strcasecmp(fmode, "kernel")) + } else if(!strcasecmp(fmode, "kernel")) { forwarding_mode = FMODE_KERNEL; - else { + } else { logger(DEBUG_ALWAYS, LOG_ERR, "Invalid forwarding mode!"); return false; } + free(fmode); } - choice = true; + choice = !(myself->options & OPTION_TCPONLY); get_config_bool(lookup_config(config_tree, "PMTUDiscovery"), &choice); - if(choice) + + if(choice) { myself->options |= OPTION_PMTU_DISCOVERY; + } choice = true; get_config_bool(lookup_config(config_tree, "ClampMSS"), &choice); - if(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")) + if(!strcasecmp(bmode, "no")) { broadcast_mode = BMODE_NONE; - else if(!strcasecmp(bmode, "yes") || !strcasecmp(bmode, "mst")) + } else if(!strcasecmp(bmode, "yes") || !strcasecmp(bmode, "mst")) { broadcast_mode = BMODE_MST; - else if(!strcasecmp(bmode, "direct")) + } else if(!strcasecmp(bmode, "direct")) { broadcast_mode = BMODE_DIRECT; - else { + } 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"); + 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(IP_TOS) + + if(priorityinheritance) { + logger(DEBUG_ALWAYS, LOG_WARNING, "%s not supported on this platform for IPv4 connections", "PriorityInheritance"); + } + #endif - if(!get_config_int(lookup_config(config_tree, "MACExpire"), &macexpire)) +#if !defined(IPV6_TCLASS) + + if(priorityinheritance) { + logger(DEBUG_ALWAYS, LOG_WARNING, "%s not supported on this platform for IPv6 connections", "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 + } else { maxtimeout = 900; + } if(get_config_string(lookup_config(config_tree, "AddressFamily"), &afname)) { - if(!strcasecmp(afname, "IPv4")) + if(!strcasecmp(afname, "IPv4")) { addressfamily = AF_INET; - else if(!strcasecmp(afname, "IPv6")) + } else if(!strcasecmp(afname, "IPv6")) { addressfamily = AF_INET6; - else if(!strcasecmp(afname, "any")) + } else if(!strcasecmp(afname, "any")) { addressfamily = AF_UNSPEC; - else { + } 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)) + if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime)) { keylifetime = 3600; + } - get_config_int(lookup_config(config_tree, "AutoConnect"), &autoconnect); + 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); + if(!get_config_int(lookup_config(config_tree, "InvitationExpire"), &invitation_lifetime)) { + invitation_lifetime = 604800; // 1 week + } + + read_invitation_key(); + + 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; + +#if 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(udp_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 */ + + environment_t env; + environment_init(&env); + execute_script("tinc-up", &env); + environment_exit(&env); +} + +void device_disable(void) { + environment_t env; + environment_init(&env); + execute_script("tinc-down", &env); + environment_exit(&env); + + if(devops.disable) { + devops.disable(); + } +} + /* Configure node_t myself and set up the local sockets (listen only) */ static bool setup_myself(void) { char *name, *hostname, *cipher, *digest, *type; char *address = NULL; + bool port_specified = false; if(!(name = get_name())) { logger(DEBUG_ALWAYS, LOG_ERR, "Name for tinc daemon required!"); return false; } + myname = xstrdup(name); myself = new_node(); myself->connection = new_connection(); myself->name = name; myself->connection->name = xstrdup(name); - read_host_config(config_tree, name); + read_host_config(config_tree, name, true); - if(!get_config_string(lookup_config(config_tree, "Port"), &myport)) + 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); + } else { + port_specified = true; + } myself->connection->options = 0; myself->connection->protocol_major = PROT_MAJOR; @@ -636,21 +857,52 @@ static bool setup_myself(void) { myself->options |= PROT_MINOR << 24; - get_config_bool(lookup_config(config_tree, "ExperimentalProtocol"), &experimental); +#ifdef DISABLE_LEGACY + experimental = read_ecdsa_private_key(); - if(experimental && !read_ecdsa_private_key()) + if(!experimental) { + logger(DEBUG_ALWAYS, LOG_ERR, "No private key available, cannot start tinc!"); return false; + } - if(!read_rsa_private_key()) - return false; +#else + + if(!get_config_bool(lookup_config(config_tree, "ExperimentalProtocol"), &experimental)) { + experimental = read_ecdsa_private_key(); + + 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()) { + 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 */ if(!atoi(myport)) { struct addrinfo *ai = str2addrinfo("localhost", myport, SOCK_DGRAM); sockaddr_t sa; - if(!ai || !ai->ai_addr) + + if(!ai || !ai->ai_addr) { return false; + } + free(myport); memcpy(&sa, ai->ai_addr, ai->ai_addrlen); + freeaddrinfo(ai); sockaddr2str(&sa, NULL, &myport); } @@ -659,61 +911,75 @@ static bool setup_myself(void) { 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)) + if(!get_config_subnet(cfg, &subnet)) { return false; + } subnet_add(myself, subnet); } /* Check some options */ - if(!setup_myself_reloadable()) + 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, "MaxConnectionBurst"), &max_connection_burst)) { + if(max_connection_burst <= 0) { + logger(DEBUG_ALWAYS, LOG_ERR, "MaxConnectionBurst cannot be negative!"); + return false; + } + } if(get_config_int(lookup_config(config_tree, "UDPRcvBuf"), &udp_rcvbuf)) { - if(udp_rcvbuf <= 0) { + 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) { + 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; } +#ifndef DISABLE_LEGACY /* Generate packet encryption key */ - if(!get_config_string(lookup_config(config_tree, "Cipher"), &cipher)) - cipher = xstrdup("blowfish"); + if(!get_config_string(lookup_config(config_tree, "Cipher"), &cipher)) { + cipher = xstrdup("aes-256-cbc"); + } - if(!(myself->incipher = cipher_open_by_name(cipher))) { + if(!strcasecmp(cipher, "none")) { + myself->incipher = NULL; + } else if(!(myself->incipher = cipher_open_by_name(cipher))) { logger(DEBUG_ALWAYS, LOG_ERR, "Unrecognized cipher type!"); return false; } free(cipher); - send_key_changed(); - timeout_add(&keyexpire_timeout, keyexpire_handler, &keyexpire_timeout, &(struct timeval){keylifetime, rand() % 100000}); + timeout_add(&keyexpire_timeout, keyexpire_handler, &keyexpire_timeout, &(struct timeval) { + keylifetime, rand() % 100000 + }); /* Check if we want to use message authentication codes... */ @@ -725,15 +991,19 @@ static bool setup_myself(void) { return false; } - if(!get_config_string(lookup_config(config_tree, "Digest"), &digest)) - digest = xstrdup("sha1"); + if(!get_config_string(lookup_config(config_tree, "Digest"), &digest)) { + digest = xstrdup("sha256"); + } - if(!(myself->indigest = digest_open_by_name(digest, maclength))) { + if(!strcasecmp(digest, "none")) { + myself->indigest = NULL; + } else if(!(myself->indigest = digest_open_by_name(digest, maclength))) { logger(DEBUG_ALWAYS, LOG_ERR, "Unrecognized digest type!"); return false; } free(digest); +#endif /* Compression */ @@ -742,8 +1012,9 @@ static bool setup_myself(void) { logger(DEBUG_ALWAYS, LOG_ERR, "Bogus compression level!"); return false; } - } else + } else { myself->incompression = 0; + } myself->connection->outcompression = 0; @@ -758,87 +1029,49 @@ static bool setup_myself(void) { graph(); - if(strictsubnets) - load_all_subnets(); - else if(autoconnect) - load_all_nodes(); + load_all_nodes(); /* Open device */ devops = os_devops; if(get_config_string(lookup_config(config_tree, "DeviceType"), &type)) { - if(!strcasecmp(type, "dummy")) + if(!strcasecmp(type, "dummy")) { devops = dummy_devops; - else if(!strcasecmp(type, "raw_socket")) + } else if(!strcasecmp(type, "raw_socket")) { devops = raw_socket_devops; - else if(!strcasecmp(type, "multicast")) + } else if(!strcasecmp(type, "multicast")) { devops = multicast_devops; + } else if(!strcasecmp(type, "fd")) { + devops = fd_devops; + } + #ifdef ENABLE_UML - else if(!strcasecmp(type, "uml")) + else if(!strcasecmp(type, "uml")) { devops = uml_devops; + } + #endif #ifdef ENABLE_VDE - else if(!strcasecmp(type, "vde")) + else if(!strcasecmp(type, "vde")) { devops = vde_devops; -#endif - } - - if(!devops.setup()) - return false; - - if(device_fd >= 0) - io_add(&device_io, handle_device_data, NULL, device_fd, IO_READ); - - /* 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 */ - -#ifndef HAVE_MINGW - int unix_fd = socket(AF_UNIX, SOCK_STREAM, 0); - if(unix_fd < 0) { - logger(DEBUG_ALWAYS, LOG_ERR, "Could not create UNIX socket: %s", sockstrerror(errno)); - return false; - } - - struct sockaddr_un sa; - sa.sun_family = AF_UNIX; - strncpy(sa.sun_path, unixsocketname, sizeof sa.sun_path); + } - if(connect(unix_fd, (struct sockaddr *)&sa, sizeof sa) >= 0) { - logger(DEBUG_ALWAYS, LOG_ERR, "UNIX socket %s is still in use!", unixsocketname); - return false; +#endif + free(type); } - unlink(unixsocketname); + get_config_bool(lookup_config(config_tree, "DeviceStandby"), &device_standby); - if(bind(unix_fd, (struct sockaddr *)&sa, sizeof sa) < 0) { - logger(DEBUG_ALWAYS, LOG_ERR, "Could not bind UNIX socket to %s: %s", unixsocketname, sockstrerror(errno)); + if(!devops.setup()) { return false; } - if(listen(unix_fd, 3) < 0) { - logger(DEBUG_ALWAYS, LOG_ERR, "Could not listen on UNIX socket %s: %s", unixsocketname, sockstrerror(errno)); - return false; + if(device_fd >= 0) { + io_add(&device_io, handle_device_data, NULL, device_fd, IO_READ); } - io_add(&unix_socket, handle_new_unix_connection, &unix_socket, unix_fd, IO_READ); -#endif + /* Open sockets */ if(!do_detach && getenv("LISTEN_FDS")) { sockaddr_t sa; @@ -855,9 +1088,10 @@ static bool setup_myself(void) { } for(int i = 0; i < listen_sockets; i++) { - salen = sizeof sa; + 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; } @@ -866,8 +1100,10 @@ static bool setup_myself(void) { #endif int udp_fd = setup_vpn_in_socket(&sa); - if(udp_fd < 0) + + if(udp_fd < 0) { return false; + } io_add(&listen_socket[i].tcp, (io_cb_t)handle_new_meta_connection, &listen_socket[i], i + 3, IO_READ); io_add(&listen_socket[i].udp, (io_cb_t)handle_incoming_vpn_data, &listen_socket[i], udp_fd, IO_READ); @@ -882,83 +1118,81 @@ 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; + if(!add_listen_address(address, true)) { + return false; } + } - struct addrinfo *ai, hint = {0}; - hint.ai_family = addressfamily; - hint.ai_socktype = SOCK_STREAM; - hint.ai_protocol = IPPROTO_TCP; - hint.ai_flags = AI_PASSIVE; + for(config_t *cfg = lookup_config(config_tree, "ListenAddress"); cfg; cfg = lookup_config_next(config_tree, cfg)) { + cfgs++; + get_config_string(cfg, &address); - int err = getaddrinfo(address && *address ? address : NULL, port, &hint, &ai); - free(address); + if(!add_listen_address(address, false)) { + return false; + } + } - if(err || !ai) { - logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "getaddrinfo", - gai_strerror(err)); + if(!cfgs) + if(!add_listen_address(address, NULL)) { 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; - } + if(!listen_sockets) { + logger(DEBUG_ALWAYS, LOG_ERR, "Unable to create any listening socket!"); + return false; + } - int tcp_fd = setup_listen_socket((sockaddr_t *) aip->ai_addr); + /* If no Port option was specified, set myport to the port used by the first listening socket. */ - if(tcp_fd < 0) - continue; + if(!port_specified || atoi(myport) == 0) { + sockaddr_t sa; + socklen_t salen = sizeof(sa); - int udp_fd = setup_vpn_in_socket((sockaddr_t *) aip->ai_addr); + if(!getsockname(listen_socket[0].udp.fd, &sa.sa, &salen)) { + free(myport); + sockaddr2str(&sa, NULL, &myport); - if(tcp_fd < 0) { - close(tcp_fd); - continue; - } + if(!myport) { + myport = xstrdup("655"); + } + } + } - 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); + xasprintf(&myself->hostname, "MYSELF port %s", myport); + myself->connection->hostname = xstrdup(myself->hostname); - if(debug_level >= DEBUG_CONNECTIONS) { - hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr); - logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Listening on %s", hostname); - free(hostname); - } + char *upnp = NULL; + get_config_string(lookup_config(config_tree, "UPnP"), &upnp); + bool upnp_tcp = false; + bool upnp_udp = false; - memcpy(&listen_socket[listen_sockets].sa, aip->ai_addr, aip->ai_addrlen); - listen_sockets++; - } + if(upnp) { + if(!strcasecmp(upnp, "yes")) { + upnp_tcp = upnp_udp = true; + } else if(!strcasecmp(upnp, "udponly")) { + upnp_udp = true; + } - freeaddrinfo(ai); - } while(cfg); + free(upnp); } - if(listen_sockets) - logger(DEBUG_ALWAYS, LOG_NOTICE, "Ready"); - else { - logger(DEBUG_ALWAYS, LOG_ERR, "Unable to create any listening socket!"); - return false; + if(upnp_tcp || upnp_udp) { +#ifdef HAVE_MINIUPNPC + upnp_init(upnp_tcp, upnp_udp); +#else + logger(DEBUG_ALWAYS, LOG_WARNING, "UPnP was requested, but tinc isn't built with miniupnpc support!"); +#endif } + /* Done. */ + last_config_check = now.tv_sec; return true; @@ -978,19 +1212,37 @@ bool setup_network(void) { if(pinginterval < 1) { pinginterval = 86400; } - } else + } else { pinginterval = 60; + } - if(!get_config_int(lookup_config(config_tree, "PingTimeout"), &pingtimeout)) + if(!get_config_int(lookup_config(config_tree, "PingTimeout"), &pingtimeout)) { pingtimeout = 5; - if(pingtimeout < 1 || pingtimeout > pinginterval) + } + + if(pingtimeout < 1 || pingtimeout > pinginterval) { pingtimeout = pinginterval; + } - if(!get_config_int(lookup_config(config_tree, "MaxOutputBufferSize"), &maxoutbufsize)) + if(!get_config_int(lookup_config(config_tree, "MaxOutputBufferSize"), &maxoutbufsize)) { maxoutbufsize = 10 * MTU; + } - if(!setup_myself()) + if(!setup_myself()) { return false; + } + + if(!init_control()) { + return false; + } + + if(!device_standby) { + device_enable(); + } + + /* Run subnet-up scripts for our own subnets */ + + subnet_update(myself, NULL, true); return true; } @@ -1002,19 +1254,23 @@ 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) + if(c->status.control) { c->socket = -1; + } + c->outgoing = NULL; 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); - terminate_connection(myself->connection, false); - free_connection(myself->connection); + connection_del(myself->connection); } for(int i = 0; i < listen_sockets; i++) { @@ -1024,32 +1280,30 @@ void close_network_connections(void) { close(listen_socket[i].udp.fd); } -#ifndef HAVE_MINGW - io_del(&unix_socket); - close(unix_socket.fd); -#endif - - 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(!device_standby) { + device_disable(); + } - if(myport) free(myport); + free(myport); - for(int i = 0; i < 4; i++) - free(envp[i]); + if(device_fd >= 0) { + io_del(&device_io); + } - devops.close(); + if(devops.close) { + devops.close(); + } + + exit_control(); + + free(scriptextension); + free(scriptinterpreter); return; }