X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fnet_setup.c;h=23dd2521c74b465cdc64405ea79b3f821e3040aa;hp=bebde4d9d2cbd3078cf8cee83289e7173c5f06d5;hb=0c7e0210d900185d4c1a9ffd969dc2a26d9523a9;hpb=18237e1f2d9dd5eef4a4e0d746d016bf94a42ad4 diff --git a/src/net_setup.c b/src/net_setup.c index bebde4d9..23dd2521 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, - 2000-2012 Guus Sliepen + 2000-2015 Guus Sliepen 2006 Scott Lamb 2010 Brandon Black @@ -22,7 +22,6 @@ #include "system.h" -#include "splay_tree.h" #include "cipher.h" #include "conf.h" #include "connection.h" @@ -32,122 +31,133 @@ #include "ecdsa.h" #include "graph.h" #include "logger.h" +#include "names.h" #include "net.h" #include "netutl.h" #include "process.h" #include "protocol.h" #include "route.h" #include "rsa.h" +#include "script.h" #include "subnet.h" #include "utils.h" #include "xalloc.h" char *myport; -static struct event device_ev; +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; +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; - char *fname; + char *pubname = NULL; char *p; - bool result = false; - - xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, n->name); init_configuration(&config_tree); - if(!read_config_file(config_tree, fname)) + 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)) { - result = ecdsa_set_base64_public_key(&n->ecdsa, 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 */ - free(fname); + if(!get_config_string(lookup_config(config_tree, "Ed25519PublicKeyFile"), &pubname)) + xasprintf(&pubname, "%s" SLASH "hosts" SLASH "%s", confbase, n->name); - if(!get_config_string(lookup_config(config_tree, "ECDSAPublicKeyFile"), &fname)) - xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, n->name); + fp = fopen(pubname, "r"); - fp = fopen(fname, "r"); - - if(!fp) { - logger(DEBUG_ALWAYS, LOG_ERR, "Error reading ECDSA public key file `%s': %s", fname, strerror(errno)); + if(!fp) goto exit; - } - result = ecdsa_read_pem_public_key(&n->ecdsa, fp); + n->ecdsa = ecdsa_read_pem_public_key(fp); fclose(fp); exit: exit_configuration(&config_tree); - free(fname); - return result; + free(pubname); + return n->ecdsa; } bool read_ecdsa_public_key(connection_t *c) { + if(ecdsa_active(c->ecdsa)) + return true; + FILE *fp; char *fname; char *p; - bool result; - /* First, check for simple ECDSAPublicKey statement */ + if(!c->config_tree) { + init_configuration(&c->config_tree); + if(!read_host_config(c->config_tree, c->name)) + return false; + } + + /* First, check for simple Ed25519PublicKey statement */ - if(get_config_string(lookup_config(c->config_tree, "ECDSAPublicKey"), &p)) { - result = ecdsa_set_base64_public_key(&c->ecdsa, p); + if(get_config_string(lookup_config(c->config_tree, "Ed25519PublicKey"), &p)) { + c->ecdsa = ecdsa_set_base64_public_key(p); free(p); - return result; + 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; } - result = ecdsa_read_pem_public_key(&c->ecdsa, fp); - fclose(fp); + c->ecdsa = ecdsa_read_pem_public_key(fp); - if(!result) - 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 result; + return c->ecdsa; } +#ifndef DISABLE_LEGACY 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"); + c->rsa = rsa_set_hex_public_key(n, "FFFF"); free(n); - return result; + return c->rsa; } /* Else, check for PublicKeyFile statement and read it */ @@ -163,29 +173,31 @@ bool read_rsa_public_key(connection_t *c) { return false; } - result = rsa_read_pem_public_key(&c->rsa, fp); + c->rsa = rsa_read_pem_public_key(fp); fclose(fp); - if(!result) + if(!c->rsa) logger(DEBUG_ALWAYS, LOG_ERR, "Reading RSA public key file `%s' failed: %s", fname, strerror(errno)); free(fname); - return result; + return c->rsa; } +#endif 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); + 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 Ed25519 keypair with `tinc -n %s generate-ed25519-keys'.", netname ?: "."); free(fname); return false; } @@ -194,29 +206,52 @@ 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 - result = ecdsa_read_pem_private_key(&myself->connection->ecdsa, fp); + myself->connection->ecdsa = ecdsa_read_pem_private_key(fp); fclose(fp); - if(!result) - 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 result; + 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; char *n, *d; - bool result; /* First, check for simple PrivateKey statement */ @@ -226,10 +261,10 @@ static bool read_rsa_private_key(void) { free(d); return false; } - result = rsa_set_hex_private_key(&myself->connection->rsa, n, "FFFF", d); + myself->connection->rsa = rsa_set_hex_private_key(n, "FFFF", d); free(n); free(d); - return true; + return myself->connection->rsa; } /* Else, check for PrivateKeyFile statement and read it */ @@ -242,6 +277,8 @@ 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; } @@ -259,31 +296,28 @@ static bool read_rsa_private_key(void) { 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); + myself->connection->rsa = rsa_read_pem_private_key(fp); fclose(fp); - if(!result) + if(!myself->connection->rsa) logger(DEBUG_ALWAYS, LOG_ERR, "Reading RSA private key file `%s' failed: %s", fname, strerror(errno)); free(fname); - return result; + return myself->connection->rsa; } +#endif -static struct event keyexpire_event; +static timeout_t keyexpire_timeout; -static void keyexpire_handler(int fd, short events, void *data) { +static void keyexpire_handler(void *data) { regenerate_key(); + timeout_set(data, &(struct timeval){keylifetime, rand() % 100000}); } 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}); + logger(DEBUG_STATUS, LOG_INFO, "Expiring symmetric keys"); + send_key_changed(); + for splay_each(node_t, n, node_tree) + n->status.validkey_in = false; } /* @@ -292,18 +326,12 @@ void regenerate_key(void) { void load_all_subnets(void) { DIR *dir; struct dirent *ent; - char *dname; - char *fname; - splay_tree_t *config_tree; - config_t *cfg; - subnet_t *s, *s2; - node_t *n; + 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; } @@ -311,17 +339,16 @@ void load_all_subnets(void) { if(!check_id(ent->d_name)) continue; - n = lookup_node(ent->d_name); + node_t *n = lookup_node(ent->d_name); #ifdef _DIRENT_HAVE_D_TYPE //if(ent->d_type != DT_REG) // continue; #endif - 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); + read_host_config(config_tree, ent->d_name); if(!n) { n = new_node(); @@ -329,12 +356,15 @@ void load_all_subnets(void) { node_add(n); } - for(cfg = lookup_config(config_tree, "Subnet"); cfg; cfg = lookup_config_next(config_tree, cfg)) { + 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; + free(s); } else { subnet_add(n, s); } @@ -346,51 +376,67 @@ void load_all_subnets(void) { closedir(dir); } +void load_all_nodes(void) { + DIR *dir; + struct dirent *ent; + char dname[PATH_MAX]; + + 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)); + return; + } + + while((ent = readdir(dir))) { + if(!check_id(ent->d_name)) + continue; + + node_t *n = lookup_node(ent->d_name); + if(n) + continue; + + n = new_node(); + n->name = xstrdup(ent->d_name); + node_add(n); + } + + closedir(dir); +} + + 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); - if(!envname) { - if(strcmp(name + 1, "HOST")) { - fprintf(stderr, "Invalid Name: environment variable %s does not exist\n", name + 1); - return false; - } - envname = alloca(32); - if(gethostname(envname, 32)) { - fprintf(stderr, "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) { char *proxy = NULL; - char *mode = 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)) + scriptextension = xstrdup(""); + get_config_string(lookup_config(config_tree, "Proxy"), &proxy); if(proxy) { if((space = strchr(proxy, ' '))) @@ -462,35 +508,43 @@ bool setup_myself_reloadable(void) { 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"), &mode)) { - if(!strcasecmp(mode, "router")) + + if(get_config_string(lookup_config(config_tree, "Mode"), &rmode)) { + if(!strcasecmp(rmode, "router")) routing_mode = RMODE_ROUTER; - else if(!strcasecmp(mode, "switch")) + else if(!strcasecmp(rmode, "switch")) routing_mode = RMODE_SWITCH; - else if(!strcasecmp(mode, "hub")) + else if(!strcasecmp(rmode, "hub")) routing_mode = RMODE_HUB; else { logger(DEBUG_ALWAYS, LOG_ERR, "Invalid routing mode!"); return false; } - free(mode); + free(rmode); } - if(get_config_string(lookup_config(config_tree, "Forwarding"), &mode)) { - if(!strcasecmp(mode, "off")) + if(get_config_string(lookup_config(config_tree, "Forwarding"), &fmode)) { + if(!strcasecmp(fmode, "off")) forwarding_mode = FMODE_OFF; - else if(!strcasecmp(mode, "internal")) + else if(!strcasecmp(fmode, "internal")) forwarding_mode = FMODE_INTERNAL; - else if(!strcasecmp(mode, "kernel")) + else if(!strcasecmp(fmode, "kernel")) forwarding_mode = FMODE_KERNEL; else { logger(DEBUG_ALWAYS, LOG_ERR, "Invalid forwarding mode!"); return false; } - free(mode); + free(fmode); } choice = true; @@ -505,18 +559,32 @@ bool setup_myself_reloadable(void) { 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"), &mode)) { - if(!strcasecmp(mode, "no")) + if(get_config_string(lookup_config(config_tree, "Broadcast"), &bmode)) { + if(!strcasecmp(bmode, "no")) broadcast_mode = BMODE_NONE; - else if(!strcasecmp(mode, "yes") || !strcasecmp(mode, "mst")) + else if(!strcasecmp(bmode, "yes") || !strcasecmp(bmode, "mst")) broadcast_mode = BMODE_MST; - else if(!strcasecmp(mode, "direct")) + else if(!strcasecmp(bmode, "direct")) broadcast_mode = BMODE_DIRECT; else { logger(DEBUG_ALWAYS, LOG_ERR, "Invalid broadcast mode!"); return false; } - free(mode); + 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) @@ -554,28 +622,163 @@ bool setup_myself_reloadable(void) { if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime)) keylifetime = 3600; + 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); + + 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(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) */ static bool setup_myself(void) { - config_t *cfg; - subnet_t *subnet; char *name, *hostname, *cipher, *digest, *type; - char *fname = NULL; char *address = NULL; - char *envp[5]; - struct addrinfo *ai, *aip, hint = {0}; - int i, err; - int replaywin_int; + 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); - myself->hostname = xstrdup("MYSELF"); - myself->connection->hostname = xstrdup("MYSELF"); + if(!get_config_string(lookup_config(config_tree, "Port"), &myport)) + myport = xstrdup("655"); + else + port_specified = true; myself->connection->options = 0; myself->connection->protocol_major = PROT_MAJOR; @@ -583,28 +786,33 @@ static bool setup_myself(void) { myself->options |= PROT_MINOR << 24; - if(!(name = get_name())) { - logger(DEBUG_ALWAYS, LOG_ERR, "Name for tinc daemon required!"); +#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(); + if(!experimental) + logger(DEBUG_ALWAYS, LOG_WARNING, "Support for SPTPS disabled."); + } else { + if(experimental && !read_ecdsa_private_key()) + return false; + } - 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); - - 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(!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 - if(!get_config_string(lookup_config(config_tree, "Port"), &myport)) - myport = xstrdup("655"); + /* Ensure myport is numeric */ if(!atoi(myport)) { struct addrinfo *ai = str2addrinfo("localhost", myport, SOCK_DGRAM); @@ -618,15 +826,13 @@ static bool setup_myself(void) { /* Read in all the subnets specified in the host configuration file */ - cfg = lookup_config(config_tree, "Subnet"); + for(config_t *cfg = lookup_config(config_tree, "Subnet"); cfg; cfg = lookup_config_next(config_tree, cfg)) { + subnet_t *subnet; - while(cfg) { if(!get_config_subnet(cfg, &subnet)) return false; subnet_add(myself, subnet); - - cfg = lookup_config_next(config_tree, cfg); } /* Check some options */ @@ -638,41 +844,53 @@ static bool setup_myself(void) { 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(!cipher_open_by_name(&myself->incipher, 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; } - regenerate_key(); + free(cipher); + + timeout_add(&keyexpire_timeout, keyexpire_handler, &keyexpire_timeout, &(struct timeval){keylifetime, rand() % 100000}); /* Check if we want to use message authentication codes... */ @@ -687,11 +905,16 @@ static bool setup_myself(void) { if(!get_config_string(lookup_config(config_tree, "Digest"), &digest)) digest = xstrdup("sha1"); - if(!digest_open_by_name(&myself->indigest, 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 */ if(get_config_int(lookup_config(config_tree, "Compression"), &myself->incompression)) { @@ -709,12 +932,16 @@ static bool setup_myself(void) { myself->nexthop = myself; myself->via = myself; myself->status.reachable = true; + myself->last_state_change = now.tv_sec; + myself->status.sptps = experimental; node_add(myself); graph(); if(strictsubnets) load_all_subnets(); + else if(autoconnect) + load_all_nodes(); /* Open device */ @@ -735,36 +962,16 @@ static bool setup_myself(void) { else if(!strcasecmp(type, "vde")) devops = vde_devops; #endif + free(type); } + get_config_bool(lookup_config(config_tree, "DeviceStandby"), &device_standby); + 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 */ - 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(i = 0; i < 4; i++) - free(envp[i]); - - /* Run subnet-up scripts for our own subnets */ - - subnet_update(myself, NULL, true); + if(device_fd >= 0) + io_add(&device_io, handle_device_data, NULL, device_fd, IO_READ); /* Open sockets */ @@ -782,34 +989,23 @@ static bool setup_myself(void) { return false; } - for(i = 0; i < listen_sockets; i++) { + 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; } - listen_socket[i].tcp = i + 3; - #ifdef FD_CLOEXEC - fcntl(i + 3, F_SETFD, 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) + int udp_fd = setup_vpn_in_socket(&sa); + if(udp_fd < 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(); - } + 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); if(debug_level >= DEBUG_CONNECTIONS) { hostname = sockaddr2hostname(&sa); @@ -821,98 +1017,51 @@ static bool setup_myself(void) { } } else { listen_sockets = 0; - 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; - } - - hint.ai_family = addressfamily; - hint.ai_socktype = SOCK_STREAM; - hint.ai_protocol = IPPROTO_TCP; - hint.ai_flags = AI_PASSIVE; - - 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)); + if(!add_listen_address(address, true)) return false; - } - - for(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); + 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; + } - if(listen_socket[listen_sockets].udp < 0) { - close(listen_socket[listen_sockets].tcp); - continue; - } + if(!cfgs) + if(!add_listen_address(address, NULL)) + return false; + } - 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(); - } + if(!listen_sockets) { + logger(DEBUG_ALWAYS, LOG_ERR, "Unable to create any listening socket!"); + return false; + } - 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 no Port option was specified, set myport to the port used by the first listening socket. */ - if(debug_level >= DEBUG_CONNECTIONS) { - hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr); - logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Listening on %s", hostname); - free(hostname); - } + if(!port_specified || atoi(myport) == 0) { + sockaddr_t sa; + socklen_t salen = sizeof sa; + if(!getsockname(listen_socket[0].udp.fd, &sa.sa, &salen)) { + free(myport); + sockaddr2str(&sa, NULL, &myport); + if(!myport) + myport = xstrdup("655"); + } + } - memcpy(&listen_socket[listen_sockets].sa, aip->ai_addr, aip->ai_addrlen); - listen_sockets++; - } + xasprintf(&myself->hostname, "MYSELF port %s", myport); + myself->connection->hostname = xstrdup(myself->hostname); - freeaddrinfo(ai); - } while(cfg); - } + /* Done. */ - 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 = now.tv_sec; return true; } @@ -945,6 +1094,16 @@ bool setup_network(void) { 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; } @@ -952,19 +1111,18 @@ bool setup_network(void) { close all open network connections */ void close_network_connections(void) { - splay_node_t *node, *next; - connection_t *c; - char *envp[5]; - int i; - - for(node = connection_tree->head; node; node = next) { + for(list_node_t *node = connection_list->head, *next; node; node = next) { next = node->next; - c = node->data; + 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(outgoing_list) + list_delete_list(outgoing_list); if(myself && myself->connection) { subnet_update(myself, NULL, false); @@ -972,33 +1130,34 @@ void close_network_connections(void) { free_connection(myself->connection); } - for(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); + for(int i = 0; i < listen_sockets; i++) { + io_del(&listen_socket[i].tcp); + io_del(&listen_socket[i].udp); + close(listen_socket[i].tcp.fd); + close(listen_socket[i].udp.fd); } - 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(i = 0; i < 4; i++) - free(envp[i]); + if (device_fd >= 0) + io_del(&device_io); + if (devops.close) + devops.close(); + + exit_control(); - devops.close(); + free(myname); + free(scriptextension); + free(scriptinterpreter); return; }