X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fnet_setup.c;h=3e435ddaebfd87b125f016298f10ead62aa1381d;hp=2301c83a25a2badc884b153ea5c3792f8a1e4a98;hb=8793fb7d43161f4d5358ff73b7a4937ad7e642e2;hpb=0233b1d710222cb09be0cbd08c1297e3ece38a9f diff --git a/src/net_setup.c b/src/net_setup.c index 2301c83a..3e435dda 100644 --- a/src/net_setup.c +++ b/src/net_setup.c @@ -47,9 +47,16 @@ char *myport; devops_t devops; +char *proxyhost; +char *proxyport; +char *proxyuser; +char *proxypass; +proxytype_t proxytype; + bool read_rsa_public_key(connection_t *c) { FILE *fp; - char *fname; + char *pubname; + char *hcfname; char *key; if(!c->rsa_key) { @@ -60,7 +67,10 @@ bool read_rsa_public_key(connection_t *c) { /* First, check for simple PublicKey statement */ if(get_config_string(lookup_config(c->config_tree, "PublicKey"), &key)) { - BN_hex2bn(&c->rsa_key->n, key); + if(BN_hex2bn(&c->rsa_key->n, key) != strlen(key)) { + logger(LOG_ERR, "Invalid PublicKey for %s!", c->name); + return false; + } BN_hex2bn(&c->rsa_key->e, "FFFF"); free(key); return true; @@ -68,80 +78,79 @@ 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)) { - fp = fopen(fname, "r"); + if(get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &pubname)) { + fp = fopen(pubname, "r"); if(!fp) { - logger(LOG_ERR, "Error reading RSA public key file `%s': %s", - fname, strerror(errno)); - free(fname); + logger(LOG_ERR, "Error reading RSA public key file `%s': %s", pubname, strerror(errno)); + free(pubname); return false; } - free(fname); c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL); fclose(fp); - if(c->rsa_key) + if(c->rsa_key) { + free(pubname); return true; /* Woohoo. */ + } /* If it fails, try PEM_read_RSA_PUBKEY. */ - fp = fopen(fname, "r"); + fp = fopen(pubname, "r"); if(!fp) { - logger(LOG_ERR, "Error reading RSA public key file `%s': %s", - fname, strerror(errno)); - free(fname); + logger(LOG_ERR, "Error reading RSA public key file `%s': %s", pubname, strerror(errno)); + free(pubname); return false; } - free(fname); c->rsa_key = PEM_read_RSA_PUBKEY(fp, &c->rsa_key, NULL, NULL); fclose(fp); if(c->rsa_key) { // RSA_blinding_on(c->rsa_key, NULL); + free(pubname); return true; } - logger(LOG_ERR, "Reading RSA public key file `%s' failed: %s", - fname, strerror(errno)); + logger(LOG_ERR, "Reading RSA public key file `%s' failed: %s", pubname, strerror(errno)); + free(pubname); return false; } /* Else, check if a harnessed public key is in the config file */ - xasprintf(&fname, "%s/hosts/%s", confbase, c->name); - fp = fopen(fname, "r"); + xasprintf(&hcfname, "%s/hosts/%s", confbase, c->name); + fp = fopen(hcfname, "r"); if(!fp) { - logger(LOG_ERR, "Error reading RSA public key file `%s': %s", fname, strerror(errno)); - free(fname); + logger(LOG_ERR, "Error reading RSA public key file `%s': %s", hcfname, strerror(errno)); + free(hcfname); return false; } c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL); fclose(fp); - free(fname); - if(c->rsa_key) + if(c->rsa_key) { + free(hcfname); return true; + } /* Try again with PEM_read_RSA_PUBKEY. */ - xasprintf(&fname, "%s/hosts/%s", confbase, c->name); - fp = fopen(fname, "r"); + fp = fopen(hcfname, "r"); if(!fp) { - logger(LOG_ERR, "Error reading RSA public key file `%s': %s", fname, strerror(errno)); - free(fname); + logger(LOG_ERR, "Error reading RSA public key file `%s': %s", hcfname, strerror(errno)); + free(hcfname); return false; } + free(hcfname); c->rsa_key = PEM_read_RSA_PUBKEY(fp, &c->rsa_key, NULL, NULL); // RSA_blinding_on(c->rsa_key, NULL); fclose(fp); - free(fname); if(c->rsa_key) return true; @@ -163,8 +172,14 @@ static bool read_rsa_private_key(void) { } myself->connection->rsa_key = RSA_new(); // RSA_blinding_on(myself->connection->rsa_key, NULL); - BN_hex2bn(&myself->connection->rsa_key->d, key); - BN_hex2bn(&myself->connection->rsa_key->n, pubkey); + if(BN_hex2bn(&myself->connection->rsa_key->d, key) != strlen(key)) { + logger(LOG_ERR, "Invalid PrivateKey for myself!"); + return false; + } + if(BN_hex2bn(&myself->connection->rsa_key->n, pubkey) != strlen(pubkey)) { + logger(LOG_ERR, "Invalid PublicKey for myself!"); + return false; + } BN_hex2bn(&myself->connection->rsa_key->e, "FFFF"); free(key); free(pubkey); @@ -221,7 +236,6 @@ void load_all_subnets(void) { config_t *cfg; subnet_t *s, *s2; node_t *n; - bool result; xasprintf(&dname, "%s/hosts", confbase); dir = opendir(dname); @@ -243,10 +257,9 @@ void load_all_subnets(void) { xasprintf(&fname, "%s/hosts/%s", confbase, ent->d_name); init_configuration(&config_tree); - result = read_config_file(config_tree, fname); + read_config_options(config_tree, ent->d_name); + read_config_file(config_tree, fname); free(fname); - if(!result) - continue; if(!n) { n = new_node(); @@ -271,6 +284,44 @@ void load_all_subnets(void) { closedir(dir); } +char *get_name(void) { + char *name = NULL; + + get_config_string(lookup_config(config_tree, "Name"), &name); + + if(!name) + return NULL; + + if(*name == '$') { + char *envname = getenv(name + 1); + if(!envname) { + if(strcmp(name + 1, "HOST")) { + 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(LOG_ERR, "Invalid name for myself!"); + free(name); + return false; + } + + return name; +} + /* Configure node_t myself and set up the local sockets (listen only) */ @@ -280,6 +331,8 @@ static bool setup_myself(void) { char *name, *hostname, *mode, *afname, *cipher, *digest, *type; char *fname = NULL; char *address = NULL; + char *proxy = NULL; + char *space; char *envp[5]; struct addrinfo *ai, *aip, hint = {0}; bool choice; @@ -295,17 +348,11 @@ static bool setup_myself(void) { myself->connection->options = 0; myself->connection->protocol_version = PROT_CURRENT; - if(!get_config_string(lookup_config(config_tree, "Name"), &name)) { /* Not acceptable */ + if(!(name = get_name())) { logger(LOG_ERR, "Name for tinc daemon required!"); return false; } - if(!check_id(name)) { - logger(LOG_ERR, "Invalid name for myself!"); - free(name); - return false; - } - myself->name = name; myself->connection->name = xstrdup(name); xasprintf(&fname, "%s/hosts/%s", confbase, name); @@ -329,6 +376,68 @@ static bool setup_myself(void) { sockaddr2str(&sa, NULL, &myport); } + get_config_string(lookup_config(config_tree, "Proxy"), &proxy); + if(proxy) { + if((space = strchr(proxy, ' '))) + *space++ = 0; + + if(!strcasecmp(proxy, "none")) { + proxytype = PROXY_NONE; + } else if(!strcasecmp(proxy, "socks4")) { + proxytype = PROXY_SOCKS4; + } else if(!strcasecmp(proxy, "socks4a")) { + proxytype = PROXY_SOCKS4A; + } else if(!strcasecmp(proxy, "socks5")) { + proxytype = PROXY_SOCKS5; + } else if(!strcasecmp(proxy, "http")) { + proxytype = PROXY_HTTP; + } else if(!strcasecmp(proxy, "exec")) { + proxytype = PROXY_EXEC; + } else { + logger(LOG_ERR, "Unknown proxy type %s!", proxy); + return false; + } + + switch(proxytype) { + case PROXY_NONE: + default: + break; + + case PROXY_EXEC: + if(!space || !*space) { + logger(LOG_ERR, "Argument expected for proxy type exec!"); + return false; + } + proxyhost = xstrdup(space); + break; + + case PROXY_SOCKS4: + case PROXY_SOCKS4A: + case PROXY_SOCKS5: + case PROXY_HTTP: + proxyhost = space; + if(space && (space = strchr(space, ' '))) + *space++ = 0, proxyport = space; + if(space && (space = strchr(space, ' '))) + *space++ = 0, proxyuser = space; + if(space && (space = strchr(space, ' '))) + *space++ = 0, proxypass = space; + if(!proxyhost || !*proxyhost || !proxyport || !*proxyport) { + logger(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); + } + /* Read in all the subnets specified in the host configuration file */ cfg = lookup_config(config_tree, "Subnet"); @@ -356,6 +465,7 @@ static bool setup_myself(void) { get_config_bool(lookup_config(config_tree, "DirectOnly"), &directonly); get_config_bool(lookup_config(config_tree, "StrictSubnets"), &strictsubnets); get_config_bool(lookup_config(config_tree, "TunnelServer"), &tunnelserver); + get_config_bool(lookup_config(config_tree, "LocalDiscovery"), &localdiscovery); strictsubnets |= tunnelserver; if(get_config_string(lookup_config(config_tree, "Mode"), &mode)) { @@ -397,8 +507,20 @@ static bool setup_myself(void) { 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"), &mode)) { + if(!strcasecmp(mode, "no")) + broadcast_mode = BMODE_NONE; + else if(!strcasecmp(mode, "yes") || !strcasecmp(mode, "mst")) + broadcast_mode = BMODE_MST; + else if(!strcasecmp(mode, "direct")) + broadcast_mode = BMODE_DIRECT; + else { + logger(LOG_ERR, "Invalid broadcast mode!"); + return false; + } + free(mode); + } #if !defined(SOL_IP) || !defined(IP_TOS) if(priorityinheritance) @@ -549,6 +671,8 @@ static bool setup_myself(void) { devops = dummy_devops; else if(!strcasecmp(type, "raw_socket")) devops = raw_socket_devops; + else if(!strcasecmp(type, "multicast")) + devops = multicast_devops; #ifdef ENABLE_UML else if(!strcasecmp(type, "uml")) devops = uml_devops; @@ -580,54 +704,112 @@ static bool setup_myself(void) { /* Open sockets */ - cfg = lookup_config(config_tree, "BindToAddress"); - - do { - get_config_string(cfg, &address); - if(cfg) - cfg = lookup_config_next(config_tree, cfg); - - hint.ai_family = addressfamily; - hint.ai_socktype = SOCK_STREAM; - hint.ai_protocol = IPPROTO_TCP; - hint.ai_flags = AI_PASSIVE; + if(!do_detach && getenv("LISTEN_FDS")) { + sockaddr_t sa; + socklen_t salen; - err = getaddrinfo(address, myport, &hint, &ai); - free(address); + listen_sockets = atoi(getenv("LISTEN_FDS")); +#ifdef HAVE_UNSETENV + unsetenv("LISTEN_FDS"); +#endif - if(err || !ai) { - logger(LOG_ERR, "System call `%s' failed: %s", "getaddrinfo", - gai_strerror(err)); + if(listen_sockets > MAXSOCKETS) { + logger(LOG_ERR, "Too many listening sockets"); return false; } - listen_sockets = 0; - - for(aip = ai; aip; aip = aip->ai_next) { - listen_socket[listen_sockets].tcp = - setup_listen_socket((sockaddr_t *) aip->ai_addr); + for(i = 0; i < listen_sockets; i++) { + salen = sizeof sa; + if(getsockname(i + 3, &sa.sa, &salen) < 0) { + logger(LOG_ERR, "Could not get address of listen fd %d: %s", i + 3, sockstrerror(errno)); + return false; + } - if(listen_socket[listen_sockets].tcp < 0) - continue; + listen_socket[i].tcp = i + 3; - listen_socket[listen_sockets].udp = - setup_vpn_in_socket((sockaddr_t *) aip->ai_addr); +#ifdef FD_CLOEXEC + fcntl(i + 3, F_SETFD, FD_CLOEXEC); +#endif - if(listen_socket[listen_sockets].udp < 0) - continue; + listen_socket[i].udp = setup_vpn_in_socket(&sa); + if(listen_socket[i].udp < 0) + return false; ifdebug(CONNECTIONS) { - hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr); + hostname = sockaddr2hostname(&sa); logger(LOG_NOTICE, "Listening on %s", hostname); free(hostname); } - memcpy(&listen_socket[listen_sockets].sa, aip->ai_addr, aip->ai_addrlen); - listen_sockets++; + memcpy(&listen_socket[i].sa, &sa, salen); } + } else { + listen_sockets = 0; + cfg = lookup_config(config_tree, "BindToAddress"); + + do { + get_config_string(cfg, &address); + if(cfg) + cfg = lookup_config_next(config_tree, cfg); + + char *port = myport; - freeaddrinfo(ai); - } while(cfg); + 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(LOG_ERR, "System call `%s' failed: %s", "getaddrinfo", + gai_strerror(err)); + return false; + } + + for(aip = ai; aip; aip = aip->ai_next) { + if(listen_sockets >= MAXSOCKETS) { + logger(LOG_ERR, "Too many listening sockets"); + return false; + } + + listen_socket[listen_sockets].tcp = + setup_listen_socket((sockaddr_t *) aip->ai_addr); + + if(listen_socket[listen_sockets].tcp < 0) + continue; + + listen_socket[listen_sockets].udp = + setup_vpn_in_socket((sockaddr_t *) aip->ai_addr); + + if(listen_socket[listen_sockets].udp < 0) + continue; + + ifdebug(CONNECTIONS) { + hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr); + logger(LOG_NOTICE, "Listening on %s", hostname); + free(hostname); + } + + memcpy(&listen_socket[listen_sockets].sa, aip->ai_addr, aip->ai_addrlen); + listen_sockets++; + } + + freeaddrinfo(ai); + } while(cfg); + } if(listen_sockets) logger(LOG_NOTICE, "Ready");