/*
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>
#include "system.h"
#include "cipher.h"
+#include "conf_net.h"
#include "conf.h"
#include "connection.h"
+#include "compression.h"
#include "control.h"
#include "device.h"
#include "digest.h"
#include "process.h"
#include "protocol.h"
#include "route.h"
-#include "rsa.h"
#include "script.h"
#include "subnet.h"
#include "utils.h"
#include "xalloc.h"
+#include "keys.h"
#ifdef HAVE_MINIUPNPC
#include "upnp.h"
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;
return n->ecdsa;
}
-bool read_ecdsa_public_key(connection_t *c) {
- if(ecdsa_active(c->ecdsa)) {
- return true;
- }
-
- FILE *fp;
- char *fname;
- char *p;
-
- if(!c->config_tree) {
- init_configuration(&c->config_tree);
-
- if(!read_host_config(c->config_tree, c->name, true)) {
- return false;
- }
- }
-
- /* First, check for simple Ed25519PublicKey statement */
-
- if(get_config_string(lookup_config(c->config_tree, "Ed25519PublicKey"), &p)) {
- c->ecdsa = ecdsa_set_base64_public_key(p);
- free(p);
- return c->ecdsa;
- }
-
- /* Else, check for Ed25519PublicKeyFile statement and read it */
-
- if(!get_config_string(lookup_config(c->config_tree, "Ed25519PublicKeyFile"), &fname)) {
- xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, c->name);
- }
-
- fp = fopen(fname, "r");
-
- if(!fp) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Error reading Ed25519 public key file `%s': %s",
- fname, strerror(errno));
- free(fname);
- return false;
- }
-
- c->ecdsa = ecdsa_read_pem_public_key(fp);
-
- if(!c->ecdsa && errno != ENOENT) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Parsing Ed25519 public key file `%s' failed.", fname);
- }
-
- fclose(fp);
- free(fname);
- return c->ecdsa;
-}
-
-#ifndef DISABLE_LEGACY
-bool read_rsa_public_key(connection_t *c) {
- FILE *fp;
- char *fname;
- char *n;
-
- /* First, check for simple PublicKey statement */
-
- if(get_config_string(lookup_config(c->config_tree, "PublicKey"), &n)) {
- c->rsa = rsa_set_hex_public_key(n, "FFFF");
- free(n);
- return c->rsa;
- }
-
- /* Else, check for PublicKeyFile statement and read it */
-
- if(!get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &fname)) {
- xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, c->name);
- }
-
- fp = fopen(fname, "r");
-
- if(!fp) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Error reading RSA public key file `%s': %s", fname, strerror(errno));
- free(fname);
- return false;
- }
-
- c->rsa = rsa_read_pem_public_key(fp);
- fclose(fp);
-
- if(!c->rsa) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Reading RSA public key file `%s' failed: %s", fname, strerror(errno));
- }
-
- free(fname);
- return c->rsa;
-}
-#endif
-
-static bool read_ecdsa_private_key(void) {
- FILE *fp;
- char *fname;
-
- /* Check for PrivateKeyFile statement and read it */
-
- if(!get_config_string(lookup_config(config_tree, "Ed25519PrivateKeyFile"), &fname)) {
- xasprintf(&fname, "%s" SLASH "ed25519_key.priv", confbase);
- }
-
- fp = fopen(fname, "r");
-
- if(!fp) {
- 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 ? : ".");
- }
-
- free(fname);
- return false;
- }
-
-#if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN)
- struct stat s;
-
- if(fstat(fileno(fp), &s)) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not stat Ed25519 private key file `%s': %s'", fname, strerror(errno));
- free(fname);
- return false;
- }
-
- if(s.st_mode & ~0100700) {
- logger(DEBUG_ALWAYS, LOG_WARNING, "Warning: insecure file permissions for Ed25519 private key file `%s'!", fname);
- }
-
-#endif
-
- myself->connection->ecdsa = ecdsa_read_pem_private_key(fp);
- fclose(fp);
-
- if(!myself->connection->ecdsa) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Reading Ed25519 private key file `%s' failed", fname);
- }
-
- free(fname);
- return myself->connection->ecdsa;
-}
-
static bool read_invitation_key(void) {
FILE *fp;
char fname[PATH_MAX];
}
#ifndef DISABLE_LEGACY
-static bool read_rsa_private_key(void) {
- FILE *fp;
- char *fname;
- char *n, *d;
-
- /* First, check for simple PrivateKey statement */
-
- if(get_config_string(lookup_config(config_tree, "PrivateKey"), &d)) {
- if(!get_config_string(lookup_config(config_tree, "PublicKey"), &n)) {
- logger(DEBUG_ALWAYS, LOG_ERR, "PrivateKey used but no PublicKey found!");
- free(d);
- return false;
- }
-
- myself->connection->rsa = rsa_set_hex_private_key(n, "FFFF", d);
- free(n);
- free(d);
- return myself->connection->rsa;
- }
-
- /* Else, check for PrivateKeyFile statement and read it */
-
- if(!get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname)) {
- xasprintf(&fname, "%s" SLASH "rsa_key.priv", confbase);
- }
-
- fp = fopen(fname, "r");
-
- if(!fp) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Error reading RSA private key file `%s': %s",
- fname, strerror(errno));
-
- if(errno == ENOENT) {
- logger(DEBUG_ALWAYS, LOG_INFO, "Create an RSA keypair with `tinc -n %s generate-rsa-keys'.", netname ? : ".");
- }
-
- free(fname);
- return false;
- }
-
-#if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN)
- struct stat s;
-
- if(fstat(fileno(fp), &s)) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not stat RSA private key file `%s': %s'", fname, strerror(errno));
- free(fname);
- return false;
- }
-
- if(s.st_mode & ~0100700) {
- logger(DEBUG_ALWAYS, LOG_WARNING, "Warning: insecure file permissions for RSA private key file `%s'!", fname);
- }
-
-#endif
-
- myself->connection->rsa = rsa_read_pem_private_key(fp);
- fclose(fp);
-
- if(!myself->connection->rsa) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Reading RSA private key file `%s' failed: %s", fname, strerror(errno));
- }
-
- free(fname);
- return myself->connection->rsa;
-}
-#endif
-
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");
}
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;
}
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++) {
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->options |= PROT_MINOR << 24;
#ifdef DISABLE_LEGACY
- experimental = read_ecdsa_private_key();
+ myself->connection->ecdsa = read_ecdsa_private_key(config_tree, NULL);
+ experimental = myself->connection->ecdsa != NULL;
if(!experimental) {
logger(DEBUG_ALWAYS, LOG_ERR, "No private key available, cannot start tinc!");
#else
if(!get_config_bool(lookup_config(config_tree, "ExperimentalProtocol"), &experimental)) {
- experimental = read_ecdsa_private_key();
+ myself->connection->ecdsa = read_ecdsa_private_key(config_tree, NULL);
+ experimental = myself->connection->ecdsa != NULL;
if(!experimental) {
logger(DEBUG_ALWAYS, LOG_WARNING, "Support for SPTPS disabled.");
}
} else {
- if(experimental && !read_ecdsa_private_key()) {
- return false;
+ if(experimental) {
+ myself->connection->ecdsa = read_ecdsa_private_key(config_tree, NULL);
+
+ if(!myself->connection->ecdsa) {
+ return false;
+ }
}
}
- if(!read_rsa_private_key()) {
+ myself->connection->rsa = read_rsa_private_key(config_tree, NULL);
+
+ if(!myself->connection->rsa) {
if(experimental) {
logger(DEBUG_ALWAYS, LOG_WARNING, "Support for legacy protocol disabled.");
} else {
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;
}
#endif
/* Compression */
-
if(get_config_int(lookup_config(config_tree, "Compression"), &myself->incompression)) {
- if(myself->incompression < 0 || myself->incompression > 11) {
+ switch(myself->incompression) {
+ case COMPRESS_LZ4:
+#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 COMPRESS_LZO_HI:
+ case COMPRESS_LZO_LO:
+#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 COMPRESS_ZLIB_9:
+ case COMPRESS_ZLIB_8:
+ case COMPRESS_ZLIB_7:
+ case COMPRESS_ZLIB_6:
+ case COMPRESS_ZLIB_5:
+ case COMPRESS_ZLIB_4:
+ case COMPRESS_ZLIB_3:
+ case COMPRESS_ZLIB_2:
+ case COMPRESS_ZLIB_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 COMPRESS_NONE:
+ 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 {
- myself->incompression = 0;
+ myself->incompression = COMPRESS_NONE;
}
- myself->connection->outcompression = 0;
+ myself->connection->outcompression = COMPRESS_NONE;
/* Done */
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;
close all open network connections
*/
void close_network_connections(void) {
- for(list_node_t *node = connection_list->head, *next; node; node = next) {
+ for(list_node_t *node = connection_list.head, *next; node; node = next) {
next = node->next;
connection_t *c = node->data;
terminate_connection(c, false);
}
- if(outgoing_list) {
- list_delete_list(outgoing_list);
- }
+ list_empty_list(&outgoing_list);
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++) {
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