X-Git-Url: https://git.librecmc.org/?p=oweals%2Ftinc.git;a=blobdiff_plain;f=src%2Fnet_setup.c;h=2684514392dac017d4b3faeba8f8b4aa510bce69;hp=813c58baca29fbf782a88d2133d9f01e00d72e4d;hb=9dea33f5301119dd4423eb962956cf2d246af3f3;hpb=f75e71bc693847af71f61fb72cd788e3e47f9bd3 diff --git a/src/net_setup.c b/src/net_setup.c index 813c58b..2684514 100644 --- a/src/net_setup.c +++ b/src/net_setup.c @@ -1,8 +1,9 @@ /* net_setup.c -- Setup. Copyright (C) 1998-2005 Ivo Timmermans, - 2000-2010 Guus Sliepen + 2000-2012 Guus Sliepen 2006 Scott Lamb + 2010 Brandon Black This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -44,6 +45,7 @@ #include "xalloc.h" char *myport; +devops_t devops; bool read_rsa_public_key(connection_t *c) { FILE *fp; @@ -112,11 +114,14 @@ bool read_rsa_public_key(connection_t *c) { xasprintf(&fname, "%s/hosts/%s", confbase, c->name); fp = fopen(fname, "r"); - if(fp) { - c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL); - fclose(fp); + if(!fp) { + logger(LOG_ERR, "Error reading RSA public key file `%s': %s", fname, strerror(errno)); + free(fname); + return false; } + c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL); + fclose(fp); free(fname); if(c->rsa_key) @@ -127,12 +132,15 @@ bool read_rsa_public_key(connection_t *c) { xasprintf(&fname, "%s/hosts/%s", confbase, c->name); fp = fopen(fname, "r"); - if(fp) { - c->rsa_key = PEM_read_RSA_PUBKEY(fp, &c->rsa_key, NULL, NULL); -// RSA_blinding_on(c->rsa_key, NULL); - fclose(fp); + if(!fp) { + logger(LOG_ERR, "Error reading RSA public key file `%s': %s", fname, strerror(errno)); + free(fname); + return false; } + 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) @@ -143,13 +151,13 @@ bool read_rsa_public_key(connection_t *c) { return false; } -bool read_rsa_private_key(void) { +static bool read_rsa_private_key(void) { FILE *fp; char *fname, *key, *pubkey; struct stat s; if(get_config_string(lookup_config(config_tree, "PrivateKey"), &key)) { - if(!get_config_string(lookup_config(myself->connection->config_tree, "PublicKey"), &pubkey)) { + if(!get_config_string(lookup_config(config_tree, "PublicKey"), &pubkey)) { logger(LOG_ERR, "PrivateKey used but no PublicKey found!"); return false; } @@ -204,16 +212,15 @@ bool read_rsa_private_key(void) { /* Read Subnets from all host config files */ -static void load_all_subnets(void) { +void load_all_subnets(void) { DIR *dir; struct dirent *ent; char *dname; char *fname; avl_tree_t *config_tree; config_t *cfg; - subnet_t *s; + subnet_t *s, *s2; node_t *n; - bool result; xasprintf(&dname, "%s/hosts", confbase); dir = opendir(dname); @@ -228,9 +235,6 @@ static void load_all_subnets(void) { continue; n = lookup_node(ent->d_name); - if(n) - continue; - #ifdef _DIRENT_HAVE_D_TYPE //if(ent->d_type != DT_REG) // continue; @@ -238,20 +242,25 @@ static 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; - n = new_node(); - n->name = xstrdup(ent->d_name); - node_add(n); + if(!n) { + n = new_node(); + n->name = xstrdup(ent->d_name); + node_add(n); + } for(cfg = lookup_config(config_tree, "Subnet"); cfg; cfg = lookup_config_next(config_tree, cfg)) { if(!get_config_subnet(cfg, &s)) continue; - subnet_add(n, s); + if((s2 = lookup_subnet(n, s))) { + s2->expires = -1; + } else { + subnet_add(n, s); + } } exit_configuration(&config_tree); @@ -263,19 +272,20 @@ static void load_all_subnets(void) { /* Configure node_t myself and set up the local sockets (listen only) */ -bool setup_myself(void) { +static bool setup_myself(void) { config_t *cfg; subnet_t *subnet; - char *name, *hostname, *mode, *afname, *cipher, *digest; + char *name, *hostname, *mode, *afname, *cipher, *digest, *type; + char *fname = NULL; char *address = NULL; char *envp[5]; struct addrinfo *ai, *aip, hint = {0}; bool choice; int i, err; + int replaywin_int; myself = new_node(); myself->connection = new_connection(); - init_configuration(&myself->connection->config_tree); myself->hostname = xstrdup("MYSELF"); myself->connection->hostname = xstrdup("MYSELF"); @@ -296,17 +306,15 @@ bool setup_myself(void) { myself->name = name; myself->connection->name = xstrdup(name); - - if(!read_connection_config(myself->connection)) { - logger(LOG_ERR, "Cannot open host configuration file for myself!"); - return false; - } + xasprintf(&fname, "%s/hosts/%s", confbase, name); + read_config_options(config_tree, name); + read_config_file(config_tree, fname); + free(fname); if(!read_rsa_private_key()) return false; - if(!get_config_string(lookup_config(config_tree, "Port"), &myport) - && !get_config_string(lookup_config(myself->connection->config_tree, "Port"), &myport)) + if(!get_config_string(lookup_config(config_tree, "Port"), &myport)) myport = xstrdup("655"); if(!atoi(myport)) { @@ -321,7 +329,7 @@ bool setup_myself(void) { /* Read in all the subnets specified in the host configuration file */ - cfg = lookup_config(myself->connection->config_tree, "Subnet"); + cfg = lookup_config(config_tree, "Subnet"); while(cfg) { if(!get_config_subnet(cfg, &subnet)) @@ -329,7 +337,7 @@ bool setup_myself(void) { subnet_add(myself, subnet); - cfg = lookup_config_next(myself->connection->config_tree, cfg); + cfg = lookup_config_next(config_tree, cfg); } /* Check some options */ @@ -340,18 +348,13 @@ bool setup_myself(void) { if(get_config_bool(lookup_config(config_tree, "TCPOnly"), &choice) && choice) myself->options |= OPTION_TCPONLY; - if(get_config_bool(lookup_config(myself->connection->config_tree, "IndirectData"), &choice) && choice) - myself->options |= OPTION_INDIRECT; - - if(get_config_bool(lookup_config(myself->connection->config_tree, "TCPOnly"), &choice) && choice) - myself->options |= OPTION_TCPONLY; - if(myself->options & OPTION_TCPONLY) myself->options |= OPTION_INDIRECT; get_config_bool(lookup_config(config_tree, "DirectOnly"), &directonly); get_config_bool(lookup_config(config_tree, "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)) { @@ -383,18 +386,18 @@ bool setup_myself(void) { } choice = true; - get_config_bool(lookup_config(myself->connection->config_tree, "PMTUDiscovery"), &choice); get_config_bool(lookup_config(config_tree, "PMTUDiscovery"), &choice); if(choice) myself->options |= OPTION_PMTU_DISCOVERY; choice = true; get_config_bool(lookup_config(config_tree, "ClampMSS"), &choice); - get_config_bool(lookup_config(myself->connection->config_tree, "ClampMSS"), &choice); if(choice) myself->options |= OPTION_CLAMP_MSS; get_config_bool(lookup_config(config_tree, "PriorityInheritance"), &priorityinheritance); + get_config_bool(lookup_config(config_tree, "DecrementTTL"), &decrement_ttl); + get_config_bool(lookup_config(config_tree, "Broadcast"), &broadcast); #if !defined(SOL_IP) || !defined(IP_TOS) if(priorityinheritance) @@ -412,6 +415,28 @@ bool setup_myself(void) { } else maxtimeout = 900; + if(get_config_int(lookup_config(config_tree, "UDPRcvBuf"), &udp_rcvbuf)) { + if(udp_rcvbuf <= 0) { + logger(LOG_ERR, "UDPRcvBuf cannot be negative!"); + return false; + } + } + + if(get_config_int(lookup_config(config_tree, "UDPSndBuf"), &udp_sndbuf)) { + if(udp_sndbuf <= 0) { + logger(LOG_ERR, "UDPSndBuf cannot be negative!"); + return false; + } + } + + if(get_config_int(lookup_config(config_tree, "ReplayWindow"), &replaywin_int)) { + if(replaywin_int < 0) { + logger(LOG_ERR, "ReplayWindow cannot be negative!"); + return false; + } + replaywin = (unsigned)replaywin_int; + } + if(get_config_string(lookup_config(config_tree, "AddressFamily"), &afname)) { if(!strcasecmp(afname, "IPv4")) addressfamily = AF_INET; @@ -431,7 +456,7 @@ bool setup_myself(void) { /* Generate packet encryption key */ if(get_config_string - (lookup_config(myself->connection->config_tree, "Cipher"), &cipher)) { + (lookup_config(config_tree, "Cipher"), &cipher)) { if(!strcasecmp(cipher, "none")) { myself->incipher = NULL; } else { @@ -459,7 +484,7 @@ bool setup_myself(void) { /* Check if we want to use message authentication codes... */ - if(get_config_string(lookup_config(myself->connection->config_tree, "Digest"), &digest)) { + if(get_config_string(lookup_config(config_tree, "Digest"), &digest)) { if(!strcasecmp(digest, "none")) { myself->indigest = NULL; } else { @@ -475,7 +500,7 @@ bool setup_myself(void) { myself->connection->outdigest = EVP_sha1(); - if(get_config_int(lookup_config(myself->connection->config_tree, "MACLength"), &myself->inmaclength)) { + if(get_config_int(lookup_config(config_tree, "MACLength"), &myself->inmaclength)) { if(myself->indigest) { if(myself->inmaclength > myself->indigest->md_size) { logger(LOG_ERR, "MAC length exceeds size of digest!"); @@ -492,7 +517,7 @@ bool setup_myself(void) { /* Compression */ - if(get_config_int(lookup_config(myself->connection->config_tree, "Compression"), &myself->incompression)) { + if(get_config_int(lookup_config(config_tree, "Compression"), &myself->incompression)) { if(myself->incompression < 0 || myself->incompression > 11) { logger(LOG_ERR, "Bogus compression level!"); return false; @@ -516,7 +541,24 @@ bool setup_myself(void) { /* Open device */ - if(!setup_device()) + devops = os_devops; + + if(get_config_string(lookup_config(config_tree, "DeviceType"), &type)) { + if(!strcasecmp(type, "dummy")) + devops = dummy_devops; + else if(!strcasecmp(type, "raw_socket")) + devops = raw_socket_devops; +#ifdef ENABLE_UML + else if(!strcasecmp(type, "uml")) + devops = uml_devops; +#endif +#ifdef ENABLE_VDE + else if(!strcasecmp(type, "vde")) + devops = vde_devops; +#endif + } + + if(!devops.setup()) return false; /* Run tinc-up script to further initialize the tap interface */ @@ -537,47 +579,58 @@ bool setup_myself(void) { /* Open sockets */ - get_config_string(lookup_config(config_tree, "BindToAddress"), &address); + listen_sockets = 0; + cfg = lookup_config(config_tree, "BindToAddress"); - hint.ai_family = addressfamily; - hint.ai_socktype = SOCK_STREAM; - hint.ai_protocol = IPPROTO_TCP; - hint.ai_flags = AI_PASSIVE; + do { + get_config_string(cfg, &address); + if(cfg) + cfg = lookup_config_next(config_tree, cfg); - err = getaddrinfo(address, myport, &hint, &ai); + hint.ai_family = addressfamily; + hint.ai_socktype = SOCK_STREAM; + hint.ai_protocol = IPPROTO_TCP; + hint.ai_flags = AI_PASSIVE; - if(err || !ai) { - logger(LOG_ERR, "System call `%s' failed: %s", "getaddrinfo", - gai_strerror(err)); - return false; - } + err = getaddrinfo(address, myport, &hint, &ai); + free(address); - listen_sockets = 0; + 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) { - listen_socket[listen_sockets].tcp = - setup_listen_socket((sockaddr_t *) aip->ai_addr); + for(aip = ai; aip; aip = aip->ai_next) { + if(listen_sockets >= MAXSOCKETS) { + logger(LOG_ERR, "Too many listening sockets"); + return false; + } - if(listen_socket[listen_sockets].tcp < 0) - continue; + listen_socket[listen_sockets].tcp = + setup_listen_socket((sockaddr_t *) aip->ai_addr); - listen_socket[listen_sockets].udp = - setup_vpn_in_socket((sockaddr_t *) aip->ai_addr); + if(listen_socket[listen_sockets].tcp < 0) + continue; - if(listen_socket[listen_sockets].udp < 0) - continue; + listen_socket[listen_sockets].udp = + setup_vpn_in_socket((sockaddr_t *) aip->ai_addr); - ifdebug(CONNECTIONS) { - hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr); - logger(LOG_NOTICE, "Listening on %s", hostname); - free(hostname); - } + if(listen_socket[listen_sockets].udp < 0) + continue; - memcpy(&listen_socket[listen_sockets].sa, aip->ai_addr, aip->ai_addrlen); - listen_sockets++; - } + 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); + freeaddrinfo(ai); + } while(cfg); if(listen_sockets) logger(LOG_NOTICE, "Ready"); @@ -679,7 +732,7 @@ void close_network_connections(void) { for(i = 0; i < 4; i++) free(envp[i]); - close_device(); + devops.close(); return; }