/*
net_setup.c -- Setup.
Copyright (C) 1998-2005 Ivo Timmermans,
- 2000-2016 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2017 Guus Sliepen <guus@tinc-vpn.org>
2006 Scott Lamb <slamb@slamb.org>
2010 Brandon Black <blblack@gmail.com>
#ifndef HAVE_RSA_SET0_KEY
int RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d) {
- BN_free(r->n); r->n = n;
- BN_free(r->e); r->e = e;
- BN_free(r->d); r->d = d;
+ BN_free(r->n);
+ r->n = n;
+ BN_free(r->e);
+ r->e = e;
+ BN_free(r->d);
+ r->d = d;
return 1;
}
#endif
logger(LOG_ERR, "Invalid PublicKey for %s!", c->name);
return false;
}
+
free(key);
BN_hex2bn(&e, "FFFF");
+
if(!n || !e || RSA_set0_key(c->rsa_key, n, e, NULL) != 1) {
BN_free(e);
BN_free(n);
logger(LOG_ERR, "RSA_set0_key() failed with PublicKey for %s!", c->name);
return false;
}
+
return true;
}
if(c->rsa_key) {
free(pubname);
- return true; /* Woohoo. */
+ return true; /* Woohoo. */
}
/* If it fails, try PEM_read_RSA_PUBKEY. */
// RSA_blinding_on(c->rsa_key, NULL);
fclose(fp);
- if(c->rsa_key)
+ if(c->rsa_key) {
return true;
+ }
logger(LOG_ERR, "No public key for %s specified!", c->name);
if(get_config_string(lookup_config(config_tree, "PrivateKey"), &key)) {
myself->connection->rsa_key = RSA_new();
+
// RSA_blinding_on(myself->connection->rsa_key, NULL);
if(BN_hex2bn(&d, key) != strlen(key)) {
logger(LOG_ERR, "Invalid PrivateKey for myself!");
free(key);
return false;
}
+
free(key);
+
if(!get_config_string(lookup_config(config_tree, "PublicKey"), &pubkey)) {
BN_free(d);
logger(LOG_ERR, "PrivateKey used but no PublicKey found!");
return false;
}
+
if(BN_hex2bn(&n, pubkey) != strlen(pubkey)) {
free(pubkey);
BN_free(d);
logger(LOG_ERR, "Invalid PublicKey for myself!");
return false;
}
+
free(pubkey);
BN_hex2bn(&e, "FFFF");
+
if(!n || !e || !d || RSA_set0_key(myself->connection->rsa_key, n, e, d) != 1) {
BN_free(d);
BN_free(e);
logger(LOG_ERR, "RSA_set0_key() failed with PrivateKey for myself!");
return false;
}
+
return true;
}
- if(!get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname))
+ if(!get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname)) {
xasprintf(&fname, "%s/rsa_key.priv", confbase);
+ }
fp = fopen(fname, "r");
if(!fp) {
logger(LOG_ERR, "Error reading RSA private key file `%s': %s",
- fname, strerror(errno));
+ fname, strerror(errno));
free(fname);
return false;
}
struct stat s;
if(!fstat(fileno(fp), &s)) {
- if(s.st_mode & ~0100700)
+ if(s.st_mode & ~0100700) {
logger(LOG_WARNING, "Warning: insecure file permissions for RSA private key file `%s'!", fname);
+ }
} else {
logger(LOG_WARNING, "Could not stat RSA private key file `%s': %s'", fname, strerror(errno));
}
+
#endif
myself->connection->rsa_key = PEM_read_RSAPrivateKey(fp, NULL, NULL, NULL);
if(!myself->connection->rsa_key) {
logger(LOG_ERR, "Reading RSA private key file `%s' failed: %s",
- fname, strerror(errno));
+ fname, strerror(errno));
free(fname);
return false;
}
xasprintf(&dname, "%s/hosts", confbase);
dir = opendir(dname);
+
if(!dir) {
logger(LOG_ERR, "Could not open %s: %s", dname, strerror(errno));
free(dname);
}
while((ent = readdir(dir))) {
- if(!check_id(ent->d_name))
+ if(!check_id(ent->d_name)) {
continue;
+ }
n = lookup_node(ent->d_name);
- #ifdef _DIRENT_HAVE_D_TYPE
+#ifdef _DIRENT_HAVE_D_TYPE
//if(ent->d_type != DT_REG)
- // continue;
- #endif
+ // continue;
+#endif
xasprintf(&fname, "%s/hosts/%s", confbase, ent->d_name);
init_configuration(&config_tree);
}
for(cfg = lookup_config(config_tree, "Subnet"); cfg; cfg = lookup_config_next(config_tree, cfg)) {
- if(!get_config_subnet(cfg, &s))
+ if(!get_config_subnet(cfg, &s)) {
continue;
+ }
if((s2 = lookup_subnet(n, s))) {
s2->expires = -1;
get_config_string(lookup_config(config_tree, "Name"), &name);
- if(!name)
+ if(!name) {
return NULL;
+ }
if(*name == '$') {
char *envname = getenv(name + 1);
char hostname[32] = "";
+
if(!envname) {
if(strcmp(name + 1, "HOST")) {
fprintf(stderr, "Invalid Name: environment variable %s does not exist\n", name + 1);
free(name);
return false;
}
- if(gethostname(hostname, sizeof hostname) || !*hostname) {
+
+ if(gethostname(hostname, sizeof(hostname)) || !*hostname) {
fprintf(stderr, "Could not get hostname: %s\n", strerror(errno));
free(name);
return false;
}
+
hostname[31] = 0;
envname = hostname;
}
+
free(name);
name = xstrdup(envname);
+
for(char *c = name; *c; c++)
- if(!isalnum(*c))
+ if(!isalnum(*c)) {
*c = '_';
+ }
}
if(!check_id(name)) {
read_config_file(config_tree, fname);
free(fname);
- if(!read_rsa_private_key())
+ if(!read_rsa_private_key()) {
return false;
+ }
- if(!get_config_string(lookup_config(config_tree, "Port"), &myport))
+ if(!get_config_string(lookup_config(config_tree, "Port"), &myport)) {
myport = xstrdup("655");
- else
+ } else {
port_specified = true;
+ }
/* 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);
sockaddr2str(&sa, NULL, &myport);
}
if(get_config_string(lookup_config(config_tree, "Proxy"), &proxy)) {
- if((space = strchr(proxy, ' ')))
+ if((space = strchr(proxy, ' '))) {
*space++ = 0;
+ }
if(!strcasecmp(proxy, "none")) {
proxytype = PROXY_NONE;
}
switch(proxytype) {
- case PROXY_NONE:
- default:
- break;
-
- case PROXY_EXEC:
- if(!space || !*space) {
- logger(LOG_ERR, "Argument expected for proxy type exec!");
- free(proxy);
- 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!");
- free(proxy);
- return false;
- }
- proxyhost = xstrdup(proxyhost);
- proxyport = xstrdup(proxyport);
- if(proxyuser && *proxyuser)
- proxyuser = xstrdup(proxyuser);
- if(proxypass && *proxypass)
- proxypass = xstrdup(proxypass);
- break;
+ case PROXY_NONE:
+ default:
+ break;
+
+ case PROXY_EXEC:
+ if(!space || !*space) {
+ logger(LOG_ERR, "Argument expected for proxy type exec!");
+ free(proxy);
+ 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!");
+ free(proxy);
+ return false;
+ }
+
+ proxyhost = xstrdup(proxyhost);
+ proxyport = xstrdup(proxyport);
+
+ if(proxyuser && *proxyuser) {
+ proxyuser = xstrdup(proxyuser);
+ }
+
+ if(proxypass && *proxypass) {
+ proxypass = xstrdup(proxypass);
+ }
+
+ break;
}
free(proxy);
cfg = lookup_config(config_tree, "Subnet");
while(cfg) {
- if(!get_config_subnet(cfg, &subnet))
+ if(!get_config_subnet(cfg, &subnet)) {
return false;
+ }
subnet_add(myself, subnet);
/* Check some options */
- 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, "DirectOnly"), &directonly);
get_config_bool(lookup_config(config_tree, "StrictSubnets"), &strictsubnets);
strictsubnets |= tunnelserver;
if(get_config_string(lookup_config(config_tree, "Mode"), &mode)) {
- if(!strcasecmp(mode, "router"))
+ if(!strcasecmp(mode, "router")) {
routing_mode = RMODE_ROUTER;
- else if(!strcasecmp(mode, "switch"))
+ } else if(!strcasecmp(mode, "switch")) {
routing_mode = RMODE_SWITCH;
- else if(!strcasecmp(mode, "hub"))
+ } else if(!strcasecmp(mode, "hub")) {
routing_mode = RMODE_HUB;
- else {
+ } else {
logger(LOG_ERR, "Invalid routing mode!");
free(mode);
return false;
}
+
free(mode);
}
if(get_config_string(lookup_config(config_tree, "Forwarding"), &mode)) {
- if(!strcasecmp(mode, "off"))
+ if(!strcasecmp(mode, "off")) {
forwarding_mode = FMODE_OFF;
- else if(!strcasecmp(mode, "internal"))
+ } else if(!strcasecmp(mode, "internal")) {
forwarding_mode = FMODE_INTERNAL;
- else if(!strcasecmp(mode, "kernel"))
+ } else if(!strcasecmp(mode, "kernel")) {
forwarding_mode = FMODE_KERNEL;
- else {
+ } else {
logger(LOG_ERR, "Invalid forwarding mode!");
free(mode);
return false;
}
+
free(mode);
}
- 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"), &mode)) {
- if(!strcasecmp(mode, "no"))
+ if(!strcasecmp(mode, "no")) {
broadcast_mode = BMODE_NONE;
- else if(!strcasecmp(mode, "yes") || !strcasecmp(mode, "mst"))
+ } else if(!strcasecmp(mode, "yes") || !strcasecmp(mode, "mst")) {
broadcast_mode = BMODE_MST;
- else if(!strcasecmp(mode, "direct"))
+ } else if(!strcasecmp(mode, "direct")) {
broadcast_mode = BMODE_DIRECT;
- else {
+ } else {
logger(LOG_ERR, "Invalid broadcast mode!");
free(mode);
return false;
}
+
free(mode);
}
#if !defined(SOL_IP) || !defined(IP_TOS)
- if(priorityinheritance)
+
+ if(priorityinheritance) {
logger(LOG_WARNING, "%s not supported on this platform for IPv4 connection", "PriorityInheritance");
+ }
+
#endif
#if !defined(IPPROTO_IPV6) || !defined(IPV6_TCLASS)
- if(priorityinheritance)
+
+ if(priorityinheritance) {
logger(LOG_WARNING, "%s not supported on this platform for IPv6 connection", "PriorityInheritance");
+ }
+
#endif
- if(!get_config_int(lookup_config(config_tree, "MACExpire"), &macexpire))
+ 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(LOG_ERR, "Bogus maximum timeout!");
return false;
}
- } else
+ } else {
maxtimeout = 900;
+ }
if(get_config_int(lookup_config(config_tree, "MinTimeout"), &mintimeout)) {
- if(mintimeout < 0) {
- logger(LOG_ERR, "Bogus minimum timeout!");
- return false;
- }
- if(mintimeout > maxtimeout) {
- logger(LOG_WARNING, "Minimum timeout (%d s) cannot be larger than maximum timeout (%d s). Correcting !", mintimeout, maxtimeout );
- mintimeout=maxtimeout;
- }
- } else
- mintimeout = 0;
+ if(mintimeout < 0) {
+ logger(LOG_ERR, "Bogus minimum timeout!");
+ return false;
+ }
+
+ if(mintimeout > maxtimeout) {
+ logger(LOG_WARNING, "Minimum timeout (%d s) cannot be larger than maximum timeout (%d s). Correcting !", mintimeout, maxtimeout);
+ mintimeout = maxtimeout;
+ }
+ } else {
+ mintimeout = 0;
+ }
if(get_config_int(lookup_config(config_tree, "UDPRcvBuf"), &udp_rcvbuf)) {
if(udp_rcvbuf <= 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"))
+ 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(LOG_ERR, "Invalid address family!");
free(afname);
return false;
}
+
free(afname);
}
return false;
}
}
+
free(cipher);
- } else
+ } else {
myself->incipher = EVP_aes_256_cbc();
+ }
- if(myself->incipher)
+ if(myself->incipher) {
myself->inkeylength = EVP_CIPHER_key_length(myself->incipher) + EVP_CIPHER_iv_length(myself->incipher);
- else
+ } else {
myself->inkeylength = 1;
+ }
/* We need to use a stream mode for the meta protocol. Use AES for this,
but try to match the key size with the one from the cipher selected
by Cipher.
+
+ If Cipher is set to none, still use a low level of encryption for the
+ meta protocol.
*/
- int keylen = EVP_CIPHER_key_length(myself->incipher);
- if(keylen <= 16)
+ int keylen = myself->incipher ? EVP_CIPHER_key_length(myself->incipher) : 0;
+
+ if(keylen <= 16) {
myself->connection->outcipher = EVP_aes_128_cfb();
- else if(keylen <= 24)
+ } else if(keylen <= 24) {
myself->connection->outcipher = EVP_aes_192_cfb();
- else
+ } else {
myself->connection->outcipher = EVP_aes_256_cfb();
+ }
- if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime))
+ if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime)) {
keylifetime = 3600;
+ }
keyexpires = now + keylifetime;
-
+
/* Check if we want to use message authentication codes... */
if(get_config_string(lookup_config(config_tree, "Digest"), &digest)) {
}
free(digest);
- } else
+ } else {
myself->indigest = EVP_sha256();
+ }
myself->connection->outdigest = EVP_sha256();
return false;
}
}
- } else
+ } else {
myself->inmaclength = 4;
+ }
myself->connection->outmaclength = 0;
logger(LOG_ERR, "Bogus compression level!");
return false;
}
- } else
+ } else {
myself->incompression = 0;
+ }
myself->connection->outcompression = 0;
graph();
- if(strictsubnets)
+ if(strictsubnets) {
load_all_subnets();
+ }
/* 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;
+ }
+
#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
free(type);
}
- if(!devops.setup())
+ if(!devops.setup()) {
return false;
+ }
/* Run tinc-up script to further initialize the tap interface */
xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
#endif
execute_script("tinc-up", envp);
- for(i = 0; i < 4; i++)
+ for(i = 0; i < 4; i++) {
free(envp[i]);
+ }
/* Run subnet-up scripts for our own subnets */
}
for(i = 0; i < listen_sockets; i++) {
- salen = sizeof sa;
+ 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;
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)
+
+ if(listen_socket[i].udp < 0) {
return false;
+ }
ifdebug(CONNECTIONS) {
hostname = sockaddr2hostname(&sa);
do {
get_config_string(cfg, &address);
- if(cfg)
+
+ 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, "*"))
+ if(!strcmp(address, "*")) {
*address = 0;
+ }
}
hint.ai_family = addressfamily;
if(err || !ai) {
logger(LOG_ERR, "System call `%s' failed: %s", "getaddrinfo",
- gai_strerror(err));
+ gai_strerror(err));
return false;
}
}
listen_socket[listen_sockets].tcp =
- setup_listen_socket((sockaddr_t *) aip->ai_addr);
+ setup_listen_socket((sockaddr_t *) aip->ai_addr);
- if(listen_socket[listen_sockets].tcp < 0)
+ if(listen_socket[listen_sockets].tcp < 0) {
continue;
+ }
listen_socket[listen_sockets].udp =
- setup_vpn_in_socket((sockaddr_t *) aip->ai_addr);
+ setup_vpn_in_socket((sockaddr_t *) aip->ai_addr);
- if(listen_socket[listen_sockets].udp < 0)
+ if(listen_socket[listen_sockets].udp < 0) {
continue;
+ }
ifdebug(CONNECTIONS) {
hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
if(!port_specified) {
sockaddr_t sa;
- socklen_t salen = sizeof sa;
+ socklen_t salen = sizeof(sa);
+
if(!getsockname(listen_socket[0].udp, &sa.sa, &salen)) {
free(myport);
sockaddr2str(&sa, NULL, &myport);
- if(!myport)
+
+ if(!myport) {
myport = xstrdup("655");
+ }
}
}
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;
+ }
return true;
}
for(list_node_t *node = outgoing_list->head; node; node = node->next) {
outgoing_t *outgoing = node->data;
- if(outgoing->event)
+ if(outgoing->event) {
event_del(outgoing->event);
+ }
}
list_delete_list(outgoing_list);
execute_script("tinc-down", envp);
- if(myport) free(myport);
+ if(myport) {
+ free(myport);
+ }
- for(i = 0; i < 4; i++)
+ for(i = 0; i < 4; i++) {
free(envp[i]);
+ }
devops.close();
projects / tinc / blobdiff