/*
net_setup.c -- Setup.
Copyright (C) 1998-2005 Ivo Timmermans,
- 2000-2017 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2021 Guus Sliepen <guus@tinc-vpn.org>
2006 Scott Lamb <slamb@slamb.org>
2010 Brandon Black <blblack@gmail.com>
devops_t devops;
bool device_standby = false;
-char *proxyhost;
-char *proxyport;
-char *proxyuser;
-char *proxypass;
+char *proxyhost = NULL;
+char *proxyport = NULL;
+char *proxyuser = NULL;
+char *proxypass = NULL;
+
proxytype_t proxytype;
bool autoconnect;
bool disablebuggypeers;
init_configuration(&config_tree);
- if(!read_host_config(config_tree, n->name)) {
+ if(!read_host_config(config_tree, n->name, true)) {
goto exit;
}
if(!c->config_tree) {
init_configuration(&c->config_tree);
- if(!read_host_config(c->config_tree, c->name)) {
+ if(!read_host_config(c->config_tree, c->name, true)) {
return false;
}
}
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 ? : ".");
+ logger(DEBUG_ALWAYS, LOG_INFO, "Create an Ed25519 key pair with `tinc -n %s generate-ed25519-keys'.", netname ? netname : ".");
}
free(fname);
return false;
}
-#if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN)
+#ifndef HAVE_MINGW
struct stat s;
if(fstat(fileno(fp), &s)) {
return false;
}
- if(s.st_mode & ~0100700) {
+ if(s.st_mode & ~0100700u) {
logger(DEBUG_ALWAYS, LOG_WARNING, "Warning: insecure file permissions for Ed25519 private key file `%s'!", fname);
}
fname, strerror(errno));
if(errno == ENOENT) {
- logger(DEBUG_ALWAYS, LOG_INFO, "Create an RSA keypair with `tinc -n %s generate-rsa-keys'.", netname ? : ".");
+ logger(DEBUG_ALWAYS, LOG_INFO, "Create an RSA key pair with `tinc -n %s generate-rsa-keys'.", netname ? netname : ".");
}
free(fname);
return false;
}
-#if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN)
+#ifndef HAVE_MINGW
struct stat s;
if(fstat(fileno(fp), &s)) {
return false;
}
- if(s.st_mode & ~0100700) {
+ if(s.st_mode & ~0100700u) {
logger(DEBUG_ALWAYS, LOG_WARNING, "Warning: insecure file permissions for RSA private key file `%s'!", fname);
}
}
#endif
+#ifndef DISABLE_LEGACY
static timeout_t keyexpire_timeout;
static void keyexpire_handler(void *data) {
keylifetime, rand() % 100000
});
}
+#endif
void regenerate_key(void) {
logger(DEBUG_STATUS, LOG_INFO, "Expiring symmetric keys");
splay_tree_t *config_tree;
init_configuration(&config_tree);
read_config_options(config_tree, ent->d_name);
- read_host_config(config_tree, ent->d_name);
+ read_host_config(config_tree, ent->d_name, true);
if(!n) {
n = new_node();
}
bool setup_myself_reloadable(void) {
- char *proxy = 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);
+ get_config_string(lookup_config(config_tree, "ScriptsInterpreter"), &scriptinterpreter);
free(scriptextension);
scriptextension = xstrdup("");
}
+ char *proxy = NULL;
+
get_config_string(lookup_config(config_tree, "Proxy"), &proxy);
if(proxy) {
+ char *space;
+
if((space = strchr(proxy, ' '))) {
*space++ = 0;
}
proxytype = PROXY_EXEC;
} else {
logger(DEBUG_ALWAYS, LOG_ERR, "Unknown proxy type %s!", proxy);
+ free(proxy);
return false;
}
+ free(proxyhost);
+ proxyhost = NULL;
+
+ free(proxyport);
+ proxyport = NULL;
+
+ free(proxyuser);
+ proxyuser = NULL;
+
+ free(proxypass);
+ proxypass = NULL;
+
switch(proxytype) {
case PROXY_NONE:
default:
case PROXY_EXEC:
if(!space || !*space) {
logger(DEBUG_ALWAYS, LOG_ERR, "Argument expected for proxy type exec!");
+ free(proxy);
return false;
}
- proxyhost = xstrdup(space);
+ proxyhost = xstrdup(space);
break;
case PROXY_SOCKS4:
*space++ = 0, proxyport = space;
}
+ if(!proxyhost || !*proxyhost || !proxyport || !*proxyport) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Host and port argument expected for proxy!");
+ proxyport = NULL;
+ proxyhost = NULL;
+ free(proxy);
+ return false;
+ }
+
if(space && (space = strchr(space, ' '))) {
*space++ = 0, proxyuser = space;
}
*space++ = 0, proxypass = space;
}
- if(!proxyhost || !*proxyhost || !proxyport || !*proxyport) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Host and port argument expected for proxy!");
- return false;
- }
-
proxyhost = xstrdup(proxyhost);
proxyport = xstrdup(proxyport);
free(proxy);
}
+ bool choice;
+
if(get_config_bool(lookup_config(config_tree, "IndirectData"), &choice) && choice) {
myself->options |= OPTION_INDIRECT;
}
get_config_bool(lookup_config(config_tree, "DirectOnly"), &directonly);
get_config_bool(lookup_config(config_tree, "LocalDiscovery"), &localdiscovery);
+ char *rmode = NULL;
+
if(get_config_string(lookup_config(config_tree, "Mode"), &rmode)) {
if(!strcasecmp(rmode, "router")) {
routing_mode = RMODE_ROUTER;
routing_mode = RMODE_HUB;
} else {
logger(DEBUG_ALWAYS, LOG_ERR, "Invalid routing mode!");
+ free(rmode);
return false;
}
free(rmode);
}
+ char *fmode = NULL;
+
if(get_config_string(lookup_config(config_tree, "Forwarding"), &fmode)) {
if(!strcasecmp(fmode, "off")) {
forwarding_mode = FMODE_OFF;
forwarding_mode = FMODE_KERNEL;
} else {
logger(DEBUG_ALWAYS, LOG_ERR, "Invalid forwarding mode!");
+ free(fmode);
return false;
}
free(fmode);
}
- choice = true;
+ choice = !(myself->options & OPTION_TCPONLY);
get_config_bool(lookup_config(config_tree, "PMTUDiscovery"), &choice);
if(choice) {
get_config_bool(lookup_config(config_tree, "PriorityInheritance"), &priorityinheritance);
get_config_bool(lookup_config(config_tree, "DecrementTTL"), &decrement_ttl);
+ char *bmode = NULL;
+
if(get_config_string(lookup_config(config_tree, "Broadcast"), &bmode)) {
if(!strcasecmp(bmode, "no")) {
broadcast_mode = BMODE_NONE;
broadcast_mode = BMODE_DIRECT;
} else {
logger(DEBUG_ALWAYS, LOG_ERR, "Invalid broadcast mode!");
+ free(bmode);
return false;
}
free(bmode);
}
+ /* Delete all broadcast subnets before re-adding them */
+
+ for splay_each(subnet_t, s, subnet_tree) {
+ if(!s->owner) {
+ splay_delete_node(subnet_tree, node);
+ }
+ }
+
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_add(NULL, s);
}
-#if !defined(IPPROTO_IP) || !defined(IP_TOS)
+#if !defined(IP_TOS)
if(priorityinheritance) {
logger(DEBUG_ALWAYS, LOG_WARNING, "%s not supported on this platform for IPv4 connections", "PriorityInheritance");
#endif
-#if !defined(IPPROTO_IPV6) || !defined(IPV6_TCLASS)
+#if !defined(IPV6_TCLASS)
if(priorityinheritance) {
logger(DEBUG_ALWAYS, LOG_WARNING, "%s not supported on this platform for IPv6 connections", "PriorityInheritance");
maxtimeout = 900;
}
+ char *afname = NULL;
+
if(get_config_string(lookup_config(config_tree, "AddressFamily"), &afname)) {
if(!strcasecmp(afname, "IPv4")) {
addressfamily = AF_INET;
addressfamily = AF_UNSPEC;
} else {
logger(DEBUG_ALWAYS, LOG_ERR, "Invalid address family!");
+ free(afname);
return false;
}
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;
- }
+ if(!get_config_bool(lookup_config(config_tree, "AutoConnect"), &autoconnect)) {
+ autoconnect = true;
}
get_config_bool(lookup_config(config_tree, "DisableBuggyPeers"), &disablebuggypeers);
if(listen_sockets >= MAXSOCKETS) {
logger(DEBUG_ALWAYS, LOG_ERR, "Too many listening sockets");
+ freeaddrinfo(ai);
return false;
}
Configure node_t myself and set up the local sockets (listen only)
*/
static bool setup_myself(void) {
- char *name, *hostname, *cipher, *digest, *type;
+ char *name, *hostname, *type;
char *address = NULL;
bool port_specified = false;
myself->connection = new_connection();
myself->name = name;
myself->connection->name = xstrdup(name);
- read_host_config(config_tree, name);
+ read_host_config(config_tree, name, true);
if(!get_config_string(lookup_config(config_tree, "Port"), &myport)) {
myport = xstrdup("655");
free(myport);
memcpy(&sa, ai->ai_addr, ai->ai_addrlen);
+ freeaddrinfo(ai);
sockaddr2str(&sa, NULL, &myport);
}
logger(DEBUG_ALWAYS, LOG_ERR, "UDPRcvBuf cannot be negative!");
return false;
}
+
+ udp_rcvbuf_warnings = true;
}
if(get_config_int(lookup_config(config_tree, "UDPSndBuf"), &udp_sndbuf)) {
logger(DEBUG_ALWAYS, LOG_ERR, "UDPSndBuf cannot be negative!");
return false;
}
+
+ udp_sndbuf_warnings = true;
+ }
+
+ get_config_int(lookup_config(config_tree, "FWMark"), &fwmark);
+#ifndef SO_MARK
+
+ if(fwmark) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "FWMark not supported on this platform!");
+ return false;
}
+#endif
+
int replaywin_int;
if(get_config_int(lookup_config(config_tree, "ReplayWindow"), &replaywin_int)) {
#ifndef DISABLE_LEGACY
/* Generate packet encryption key */
+ char *cipher;
+
if(!get_config_string(lookup_config(config_tree, "Cipher"), &cipher)) {
cipher = xstrdup("aes-256-cbc");
}
myself->incipher = NULL;
} else if(!(myself->incipher = cipher_open_by_name(cipher))) {
logger(DEBUG_ALWAYS, LOG_ERR, "Unrecognized cipher type!");
+ free(cipher);
return false;
}
return false;
}
+ char *digest;
+
if(!get_config_string(lookup_config(config_tree, "Digest"), &digest)) {
digest = xstrdup("sha256");
}
myself->indigest = NULL;
} else if(!(myself->indigest = digest_open_by_name(digest, maclength))) {
logger(DEBUG_ALWAYS, LOG_ERR, "Unrecognized digest type!");
+ free(digest);
return false;
}
/* Compression */
if(get_config_int(lookup_config(config_tree, "Compression"), &myself->incompression)) {
- if(myself->incompression < 0 || myself->incompression > 11) {
+ switch(myself->incompression) {
+ case 12:
+#ifdef HAVE_LZ4
+ break;
+#else
+ logger(DEBUG_ALWAYS, LOG_ERR, "Bogus compression level!");
+ logger(DEBUG_ALWAYS, LOG_ERR, "LZ4 compression is unavailable on this node.");
+ return false;
+#endif
+
+ case 11:
+ case 10:
+#ifdef HAVE_LZO
+ break;
+#else
+ logger(DEBUG_ALWAYS, LOG_ERR, "Bogus compression level!");
+ logger(DEBUG_ALWAYS, LOG_ERR, "LZO compression is unavailable on this node.");
+ return false;
+#endif
+
+ case 9:
+ case 8:
+ case 7:
+ case 6:
+ case 5:
+ case 4:
+ case 3:
+ case 2:
+ case 1:
+#ifdef HAVE_ZLIB
+ break;
+#else
logger(DEBUG_ALWAYS, LOG_ERR, "Bogus compression level!");
+ logger(DEBUG_ALWAYS, LOG_ERR, "ZLIB compression is unavailable on this node.");
+ return false;
+#endif
+
+ case 0:
+ break;
+
+ default:
+ logger(DEBUG_ALWAYS, LOG_ERR, "Bogus compression level!");
+ logger(DEBUG_ALWAYS, LOG_ERR, "Compression level %i is unrecognized by this node.", myself->incompression);
return false;
}
} else {
devops = raw_socket_devops;
} else if(!strcasecmp(type, "multicast")) {
devops = multicast_devops;
- } else if(!strcasecmp(type, "fd")) {
+ }
+
+#ifdef HAVE_SYS_UN_H
+ else if(!strcasecmp(type, "fd")) {
devops = fd_devops;
}
+#endif
#ifdef ENABLE_UML
else if(!strcasecmp(type, "uml")) {
devops = uml_devops;
if(myself && myself->connection) {
subnet_update(myself, NULL, false);
- connection_del(myself->connection);
+ free_connection(myself->connection);
}
for(int i = 0; i < listen_sockets; i++) {