X-Git-Url: https://tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Fnet_setup.c;h=207ce42543b4c9da1c542aa4f7484b580953a425;hb=3fba80174dbe29bcfe0d121a2a1d2e61be5ee57b;hp=9c188957afa449c5fca8849f69d0884893cae642;hpb=a22041922f160667573e9a5ae3f4195e1668906a;p=tinc diff --git a/src/net_setup.c b/src/net_setup.c index 9c188957..207ce425 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 @@ -28,6 +29,7 @@ #include "control.h" #include "device.h" #include "digest.h" +#include "ecdsa.h" #include "graph.h" #include "logger.h" #include "net.h" @@ -42,6 +44,91 @@ char *myport; static struct event device_ev; +devops_t devops; + +bool node_read_ecdsa_public_key(node_t *n) { + if(ecdsa_active(&n->ecdsa)) + return true; + + splay_tree_t *config_tree; + FILE *fp; + char *fname; + char *p; + bool result = false; + + xasprintf(&fname, "%s/hosts/%s", confbase, n->name); + + init_configuration(&config_tree); + if(!read_config_file(config_tree, fname)) + goto exit; + + /* First, check for simple ECDSAPublicKey statement */ + + if(get_config_string(lookup_config(config_tree, "ECDSAPublicKey"), &p)) { + result = ecdsa_set_base64_public_key(&n->ecdsa, p); + free(p); + goto exit; + } + + /* Else, check for ECDSAPublicKeyFile statement and read it */ + + free(fname); + + if(!get_config_string(lookup_config(config_tree, "ECDSAPublicKeyFile"), &fname)) + xasprintf(&fname, "%s/hosts/%s", confbase, n->name); + + fp = fopen(fname, "r"); + + if(!fp) { + logger(LOG_ERR, "Error reading ECDSA public key file `%s': %s", fname, strerror(errno)); + goto exit; + } + + result = ecdsa_read_pem_public_key(&n->ecdsa, fp); + fclose(fp); + +exit: + exit_configuration(&config_tree); + free(fname); + return result; +} + +bool read_ecdsa_public_key(connection_t *c) { + FILE *fp; + char *fname; + char *p; + bool result; + + /* First, check for simple ECDSAPublicKey statement */ + + if(get_config_string(lookup_config(c->config_tree, "ECDSAPublicKey"), &p)) { + result = ecdsa_set_base64_public_key(&c->ecdsa, p); + free(p); + return result; + } + + /* Else, check for ECDSAPublicKeyFile statement and read it */ + + if(!get_config_string(lookup_config(c->config_tree, "ECDSAPublicKeyFile"), &fname)) + xasprintf(&fname, "%s/hosts/%s", confbase, c->name); + + fp = fopen(fname, "r"); + + if(!fp) { + logger(LOG_ERR, "Error reading ECDSA public key file `%s': %s", + fname, strerror(errno)); + free(fname); + return false; + } + + result = ecdsa_read_pem_public_key(&c->ecdsa, fp); + fclose(fp); + + if(!result) + logger(LOG_ERR, "Reading ECDSA public key file `%s' failed: %s", fname, strerror(errno)); + free(fname); + return result; +} bool read_rsa_public_key(connection_t *c) { FILE *fp; @@ -65,8 +152,7 @@ bool read_rsa_public_key(connection_t *c) { fp = fopen(fname, "r"); if(!fp) { - logger(LOG_ERR, "Error reading RSA public key file `%s': %s", - fname, strerror(errno)); + logger(LOG_ERR, "Error reading RSA public key file `%s': %s", fname, strerror(errno)); free(fname); return false; } @@ -80,7 +166,47 @@ bool read_rsa_public_key(connection_t *c) { return result; } -bool read_rsa_private_key() { +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/ecdsa_key.priv", confbase); + + fp = fopen(fname, "r"); + + if(!fp) { + logger(LOG_ERR, "Error reading ECDSA private key file `%s': %s", fname, strerror(errno)); + free(fname); + return false; + } + +#if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN) + struct stat s; + + if(fstat(fileno(fp), &s)) { + logger(LOG_ERR, "Could not stat ECDSA private key file `%s': %s'", fname, strerror(errno)); + free(fname); + return false; + } + + if(s.st_mode & ~0100700) + logger(LOG_WARNING, "Warning: insecure file permissions for ECDSA private key file `%s'!", fname); +#endif + + result = ecdsa_read_pem_private_key(&myself->connection->ecdsa, fp); + fclose(fp); + + if(!result) + logger(LOG_ERR, "Reading ECDSA private key file `%s' failed: %s", fname, strerror(errno)); + free(fname); + return result; +} + +static bool read_rsa_private_key(void) { FILE *fp; char *fname; char *n, *d; @@ -142,11 +268,11 @@ static void keyexpire_handler(int fd, short events, void *data) { regenerate_key(); } -void regenerate_key() { +void regenerate_key(void) { if(timeout_initialized(&keyexpire_event)) { ifdebug(STATUS) logger(LOG_INFO, "Expiring symmetric keys"); event_del(&keyexpire_event); - send_key_changed(broadcast, myself); + send_key_changed(); } else { timeout_set(&keyexpire_event, keyexpire_handler, NULL); } @@ -219,16 +345,17 @@ 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(); @@ -237,7 +364,8 @@ bool setup_myself(void) { myself->connection->hostname = xstrdup("MYSELF"); myself->connection->options = 0; - myself->connection->protocol_version = PROT_CURRENT; + myself->connection->protocol_major = PROT_MAJOR; + myself->connection->protocol_minor = PROT_MINOR; if(!get_config_string(lookup_config(config_tree, "Name"), &name)) { /* Not acceptable */ logger(LOG_ERR, "Name for tinc daemon required!"); @@ -257,6 +385,11 @@ bool setup_myself(void) { 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; @@ -341,6 +474,8 @@ 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); + get_config_bool(lookup_config(config_tree, "Broadcast"), &broadcast); #if !defined(SOL_IP) || !defined(IP_TOS) if(priorityinheritance) @@ -358,6 +493,28 @@ 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; @@ -391,9 +548,6 @@ 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)) - digest = xstrdup("sha1"); - int maclength = 4; get_config_int(lookup_config(config_tree, "MACLength"), &maclength); @@ -402,6 +556,9 @@ bool setup_myself(void) { return false; } + if(!get_config_string(lookup_config(config_tree, "Digest"), &digest)) + digest = xstrdup("sha1"); + if(!digest_open_by_name(&myself->indigest, digest, maclength)) { logger(LOG_ERR, "Unrecognized digest type!"); return false; @@ -433,7 +590,24 @@ 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; if(device_fd >= 0) { @@ -441,7 +615,7 @@ bool setup_myself(void) { if (event_add(&device_ev, NULL) < 0) { logger(LOG_ERR, "event_add failed: %s", strerror(errno)); - close_device(); + devops.close(); return false; } } @@ -464,72 +638,78 @@ 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) { - close(listen_socket[listen_sockets].tcp); - continue; - } + listen_socket[listen_sockets].udp = + setup_vpn_in_socket((sockaddr_t *) aip->ai_addr); - 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(LOG_ERR, "event_add failed: %s", strerror(errno)); - abort(); - } + if(listen_socket[listen_sockets].udp < 0) { + close(listen_socket[listen_sockets].tcp); + continue; + } - event_set(&listen_socket[listen_sockets].ev_udp, - listen_socket[listen_sockets].udp, - EV_READ|EV_PERSIST, - handle_incoming_vpn_data, NULL); - if(event_add(&listen_socket[listen_sockets].ev_udp, NULL) < 0) { - logger(LOG_ERR, "event_add failed: %s", strerror(errno)); - abort(); - } + 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(LOG_ERR, "event_add failed: %s", strerror(errno)); + abort(); + } - ifdebug(CONNECTIONS) { - hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr); - logger(LOG_NOTICE, "Listening on %s", hostname); - free(hostname); - } + 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(LOG_ERR, "event_add failed: %s", strerror(errno)); + abort(); + } - 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); + } - if(listen_sockets >= MAXSOCKETS) { - logger(LOG_WARNING, "Maximum of %d listening sockets reached", MAXSOCKETS); - break; + 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"); @@ -584,7 +764,7 @@ void close_network_connections(void) { for(node = connection_tree->head; node; node = next) { next = node->next; c = node->data; - c->outgoing = false; + c->outgoing = NULL; terminate_connection(c, false); } @@ -622,7 +802,7 @@ void close_network_connections(void) { for(i = 0; i < 4; i++) free(envp[i]); - close_device(); + devops.close(); return; }