/*
net_setup.c -- Setup.
Copyright (C) 1998-2005 Ivo Timmermans,
- 2000-2006 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>
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
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- $Id$
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "system.h"
#include "netutl.h"
#include "process.h"
#include "protocol.h"
+#include "proxy.h"
#include "route.h"
#include "subnet.h"
#include "utils.h"
#include "xalloc.h"
char *myport;
+devops_t devops;
+
+#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;
+ return 1;
+}
+#endif
-bool read_rsa_public_key(connection_t *c)
-{
+bool read_rsa_public_key(connection_t *c) {
FILE *fp;
- char *fname;
+ char *pubname;
+ char *hcfname;
char *key;
-
- cp();
+ BIGNUM *n = NULL;
+ BIGNUM *e = NULL;
if(!c->rsa_key) {
c->rsa_key = RSA_new();
/* First, check for simple PublicKey statement */
if(get_config_string(lookup_config(c->config_tree, "PublicKey"), &key)) {
- BN_hex2bn(&c->rsa_key->n, key);
- BN_hex2bn(&c->rsa_key->e, "FFFF");
+ if((size_t)BN_hex2bn(&n, key) != strlen(key)) {
+ free(key);
+ 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;
}
/* Else, check for PublicKeyFile statement and read it */
- if(get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &fname)) {
- fp = fopen(fname, "r");
+ if(get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &pubname)) {
+ fp = fopen(pubname, "r");
if(!fp) {
- logger(LOG_ERR, _("Error reading RSA public key file `%s': %s"),
- fname, strerror(errno));
- free(fname);
+ logger(LOG_ERR, "Error reading RSA public key file `%s': %s", pubname, strerror(errno));
+ free(pubname);
return false;
}
- free(fname);
c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
fclose(fp);
- if(c->rsa_key)
- return true; /* Woohoo. */
+ if(c->rsa_key) {
+ free(pubname);
+ return true; /* Woohoo. */
+ }
/* If it fails, try PEM_read_RSA_PUBKEY. */
- fp = fopen(fname, "r");
+ fp = fopen(pubname, "r");
if(!fp) {
- logger(LOG_ERR, _("Error reading RSA public key file `%s': %s"),
- fname, strerror(errno));
- free(fname);
+ logger(LOG_ERR, "Error reading RSA public key file `%s': %s", pubname, strerror(errno));
+ free(pubname);
return false;
}
- free(fname);
c->rsa_key = PEM_read_RSA_PUBKEY(fp, &c->rsa_key, NULL, NULL);
fclose(fp);
if(c->rsa_key) {
// RSA_blinding_on(c->rsa_key, NULL);
+ free(pubname);
return true;
}
- logger(LOG_ERR, _("Reading RSA public key file `%s' failed: %s"),
- fname, strerror(errno));
+ logger(LOG_ERR, "Reading RSA public key file `%s' failed: %s", pubname, strerror(errno));
+ free(pubname);
return false;
}
/* Else, check if a harnessed public key is in the config file */
- asprintf(&fname, "%s/hosts/%s", confbase, c->name);
- fp = fopen(fname, "r");
+ xasprintf(&hcfname, "%s/hosts/%s", confbase, c->name);
+ fp = fopen(hcfname, "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", hcfname, strerror(errno));
+ free(hcfname);
+ return false;
}
- free(fname);
+ c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
+ fclose(fp);
- if(c->rsa_key)
+ if(c->rsa_key) {
+ free(hcfname);
return true;
+ }
/* Try again with PEM_read_RSA_PUBKEY. */
- asprintf(&fname, "%s/hosts/%s", confbase, c->name);
- fp = fopen(fname, "r");
+ fp = fopen(hcfname, "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", hcfname, strerror(errno));
+ free(hcfname);
+ return false;
}
- free(fname);
+ free(hcfname);
+ c->rsa_key = PEM_read_RSA_PUBKEY(fp, &c->rsa_key, NULL, NULL);
+// 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);
+ logger(LOG_ERR, "No public key for %s specified!", c->name);
return false;
}
-bool read_rsa_private_key(void)
-{
+static bool read_rsa_private_key(void) {
FILE *fp;
char *fname, *key, *pubkey;
- struct stat s;
-
- cp();
+ BIGNUM *n = NULL;
+ BIGNUM *e = NULL;
+ BIGNUM *d = NULL;
if(get_config_string(lookup_config(config_tree, "PrivateKey"), &key)) {
- if(!get_config_string(lookup_config(myself->connection->config_tree, "PublicKey"), &pubkey)) {
- logger(LOG_ERR, _("PrivateKey used but no PublicKey found!"));
- return false;
- }
myself->connection->rsa_key = RSA_new();
+
// RSA_blinding_on(myself->connection->rsa_key, NULL);
- BN_hex2bn(&myself->connection->rsa_key->d, key);
- BN_hex2bn(&myself->connection->rsa_key->n, pubkey);
- BN_hex2bn(&myself->connection->rsa_key->e, "FFFF");
+ if((size_t)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((size_t)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);
+ BN_free(n);
+ 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))
- asprintf(&fname, "%s/rsa_key.priv", confbase);
+ 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));
+ logger(LOG_ERR, "Error reading RSA private key file `%s': %s",
+ fname, strerror(errno));
free(fname);
return false;
}
#if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN)
- if(fstat(fileno(fp), &s)) {
- logger(LOG_ERR, _("Could not stat RSA private key file `%s': %s'"),
- fname, strerror(errno));
- free(fname);
- return false;
+ struct stat s;
+
+ if(!fstat(fileno(fp), &s)) {
+ 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));
}
- if(s.st_mode & ~0100700)
- logger(LOG_WARNING, _("Warning: insecure file permissions for RSA private key file `%s'!"), fname);
#endif
myself->connection->rsa_key = PEM_read_RSAPrivateKey(fp, NULL, NULL, NULL);
fclose(fp);
if(!myself->connection->rsa_key) {
- logger(LOG_ERR, _("Reading RSA private key file `%s' failed: %s"),
- fname, strerror(errno));
+ logger(LOG_ERR, "Reading RSA private key file `%s' failed: %s",
+ fname, strerror(errno));
free(fname);
return false;
}
return true;
}
+/*
+ Read Subnets from all host config files
+*/
+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, *s2;
+ node_t *n;
+
+ xasprintf(&dname, "%s/hosts", confbase);
+ dir = opendir(dname);
+
+ if(!dir) {
+ logger(LOG_ERR, "Could not open %s: %s", dname, strerror(errno));
+ free(dname);
+ return;
+ }
+
+ while((ent = readdir(dir))) {
+ if(!check_id(ent->d_name)) {
+ continue;
+ }
+
+ n = lookup_node(ent->d_name);
+#ifdef _DIRENT_HAVE_D_TYPE
+ //if(ent->d_type != DT_REG)
+ // continue;
+#endif
+
+ xasprintf(&fname, "%s/hosts/%s", confbase, ent->d_name);
+ init_configuration(&config_tree);
+ read_config_options(config_tree, ent->d_name);
+ read_config_file(config_tree, fname);
+ free(fname);
+
+ 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;
+ }
+
+ if((s2 = lookup_subnet(n, s))) {
+ s2->expires = -1;
+ } else {
+ subnet_add(n, s);
+ }
+ }
+
+ exit_configuration(&config_tree);
+ }
+
+ closedir(dir);
+}
+
+char *get_name(void) {
+ char *name = NULL;
+
+ get_config_string(lookup_config(config_tree, "Name"), &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) {
+ 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)) {
+ *c = '_';
+ }
+ }
+
+ if(!check_id(name)) {
+ logger(LOG_ERR, "Invalid name for myself!");
+ free(name);
+ return false;
+ }
+
+ return name;
+}
+
/*
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};
+ char *proxy = NULL;
+ char *space;
+ char *envp[5] = {};
+ struct addrinfo *ai, *aip, hint = {};
bool choice;
int i, err;
-
- cp();
+ int replaywin_int;
+ bool port_specified = false;
myself = new_node();
myself->connection = new_connection();
- init_configuration(&myself->connection->config_tree);
- asprintf(&myself->hostname, _("MYSELF"));
- asprintf(&myself->connection->hostname, _("MYSELF"));
+ myself->hostname = xstrdup("MYSELF");
+ myself->connection->hostname = xstrdup("MYSELF");
myself->connection->options = 0;
myself->connection->protocol_version = PROT_CURRENT;
- if(!get_config_string(lookup_config(config_tree, "Name"), &name)) { /* Not acceptable */
- logger(LOG_ERR, _("Name for tinc daemon required!"));
+ if(!(name = get_name())) {
+ logger(LOG_ERR, "Name for tinc daemon required!");
return false;
}
- if(!check_id(name)) {
- logger(LOG_ERR, _("Invalid name for myself!"));
- free(name);
- return false;
- }
+ /* Read tinc.conf and our own host config file */
myself->name = name;
myself->connection->name = xstrdup(name);
+ xasprintf(&fname, "%s/hosts/%s", confbase, name);
+ read_config_options(config_tree, name);
+ read_config_file(config_tree, fname);
+ free(fname);
- if(!read_connection_config(myself->connection)) {
- logger(LOG_ERR, _("Cannot open host configuration file for myself!"));
+ if(!read_rsa_private_key()) {
return false;
}
- if(!read_rsa_private_key())
- return false;
+ if(!get_config_string(lookup_config(config_tree, "Port"), &myport)) {
+ myport = xstrdup("655");
+ } else {
+ port_specified = true;
+ }
- if(!get_config_string(lookup_config(myself->connection->config_tree, "Port"), &myport))
- asprintf(&myport, "655");
+ /* Ensure myport is numeric */
+
+ if(!atoi(myport)) {
+ struct addrinfo *ai = str2addrinfo("localhost", myport, SOCK_DGRAM);
+ sockaddr_t sa;
+
+ 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, ' '))) {
+ *space++ = 0;
+ }
+
+ if(!strcasecmp(proxy, "none")) {
+ proxytype = PROXY_NONE;
+ } else if(!strcasecmp(proxy, "socks4")) {
+ proxytype = PROXY_SOCKS4;
+ } else if(!strcasecmp(proxy, "socks4a")) {
+ proxytype = PROXY_SOCKS4A;
+ } else if(!strcasecmp(proxy, "socks5")) {
+ proxytype = PROXY_SOCKS5;
+ } else if(!strcasecmp(proxy, "http")) {
+ proxytype = PROXY_HTTP;
+ } else if(!strcasecmp(proxy, "exec")) {
+ proxytype = PROXY_EXEC;
+ } else {
+ logger(LOG_ERR, "Unknown proxy type %s!", proxy);
+ free(proxy);
+ return false;
+ }
+
+ 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;
+ }
+
+ free(proxy);
+ }
/* 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))
+ if(!get_config_subnet(cfg, &subnet)) {
return false;
+ }
subnet_add(myself, subnet);
- cfg = lookup_config_next(myself->connection->config_tree, cfg);
+ cfg = lookup_config_next(config_tree, cfg);
}
/* Check some options */
- 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)
- myself->options |= OPTION_TCPONLY;
-
- if(get_config_bool(lookup_config(myself->connection->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(myself->connection->config_tree, "TCPOnly"), &choice) && choice)
+ 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, "PMTUDiscovery"), &choice) && choice)
- myself->options |= OPTION_PMTU_DISCOVERY;
-
- 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);
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)) {
- 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 {
- logger(LOG_ERR, _("Invalid routing mode!"));
+ } 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")) {
+ forwarding_mode = FMODE_OFF;
+ } else if(!strcasecmp(mode, "internal")) {
+ forwarding_mode = FMODE_INTERNAL;
+ } else if(!strcasecmp(mode, "kernel")) {
+ forwarding_mode = FMODE_KERNEL;
+ } else {
+ logger(LOG_ERR, "Invalid forwarding mode!");
+ free(mode);
return false;
}
+
free(mode);
- } else
- routing_mode = RMODE_ROUTER;
+ }
+
+ choice = !(myself->options & OPTION_TCPONLY);
+ 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);
+
+ 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")) {
+ broadcast_mode = BMODE_NONE;
+ } else if(!strcasecmp(mode, "yes") || !strcasecmp(mode, "mst")) {
+ broadcast_mode = BMODE_MST;
+ } else if(!strcasecmp(mode, "direct")) {
+ broadcast_mode = BMODE_DIRECT;
+ } else {
+ logger(LOG_ERR, "Invalid broadcast mode!");
+ free(mode);
+ return false;
+ }
+
+ free(mode);
+ }
#if !defined(SOL_IP) || !defined(IP_TOS)
- if(priorityinheritance)
- logger(LOG_WARNING, _("PriorityInheritance not supported on this platform"));
+
+ 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) {
+ 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!"));
+ 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(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"))
+ 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 {
- logger(LOG_ERR, _("Invalid address family!"));
+ } else {
+ logger(LOG_ERR, "Invalid address family!");
+ free(afname);
return false;
}
+
free(afname);
}
/* Generate packet encryption key */
- if(get_config_string
- (lookup_config(myself->connection->config_tree, "Cipher"), &cipher)) {
+ if(get_config_string(lookup_config(config_tree, "Cipher"), &cipher)) {
if(!strcasecmp(cipher, "none")) {
- myself->cipher = NULL;
+ myself->incipher = NULL;
} else {
- myself->cipher = EVP_get_cipherbyname(cipher);
+ myself->incipher = EVP_get_cipherbyname(cipher);
- if(!myself->cipher) {
- logger(LOG_ERR, _("Unrecognized cipher type!"));
+ if(!myself->incipher) {
+ logger(LOG_ERR, "Unrecognized cipher type!");
+ free(cipher);
return false;
}
}
- } else
- myself->cipher = EVP_bf_cbc();
- if(myself->cipher)
- myself->keylength = myself->cipher->key_len + myself->cipher->iv_len;
- else
- myself->keylength = 1;
+ free(cipher);
+ } else {
+ myself->incipher = EVP_aes_256_cbc();
+ }
- myself->connection->outcipher = EVP_bf_ofb();
+ if(myself->incipher) {
+ myself->inkeylength = EVP_CIPHER_key_length(myself->incipher) + EVP_CIPHER_iv_length(myself->incipher);
+ } else {
+ myself->inkeylength = 1;
+ }
- myself->key = xmalloc(myself->keylength);
- RAND_pseudo_bytes((unsigned char *)myself->key, myself->keylength);
+ /* 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(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime))
- keylifetime = 3600;
+ If Cipher is set to none, still use a low level of encryption for the
+ meta protocol.
+ */
- keyexpires = now + keylifetime;
-
- if(myself->cipher) {
- EVP_CIPHER_CTX_init(&packet_ctx);
- if(!EVP_DecryptInit_ex(&packet_ctx, myself->cipher, NULL, (unsigned char *)myself->key, (unsigned char *)myself->key + myself->cipher->key_len)) {
- logger(LOG_ERR, _("Error during initialisation of cipher for %s (%s): %s"),
- myself->name, myself->hostname, ERR_error_string(ERR_get_error(), NULL));
- return false;
- }
+ 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) {
+ myself->connection->outcipher = EVP_aes_192_cfb();
+ } else {
+ myself->connection->outcipher = EVP_aes_256_cfb();
}
+ 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(myself->connection->config_tree, "Digest"), &digest)) {
+ if(get_config_string(lookup_config(config_tree, "Digest"), &digest)) {
if(!strcasecmp(digest, "none")) {
- myself->digest = NULL;
+ myself->indigest = NULL;
} else {
- myself->digest = EVP_get_digestbyname(digest);
+ myself->indigest = EVP_get_digestbyname(digest);
- if(!myself->digest) {
- logger(LOG_ERR, _("Unrecognized digest type!"));
+ if(!myself->indigest) {
+ logger(LOG_ERR, "Unrecognized digest type!");
+ free(digest);
return false;
}
}
- } else
- myself->digest = EVP_sha1();
- myself->connection->outdigest = EVP_sha1();
+ free(digest);
+ } else {
+ myself->indigest = EVP_sha256();
+ }
+
+ myself->connection->outdigest = EVP_sha256();
- if(get_config_int(lookup_config(myself->connection->config_tree, "MACLength"),
- &myself->maclength)) {
- if(myself->digest) {
- if(myself->maclength > myself->digest->md_size) {
- logger(LOG_ERR, _("MAC length exceeds size of digest!"));
+ if(get_config_int(lookup_config(config_tree, "MACLength"), &myself->inmaclength)) {
+ if(myself->indigest) {
+ if(myself->inmaclength > EVP_MD_size(myself->indigest)) {
+ logger(LOG_ERR, "MAC length exceeds size of digest!");
return false;
- } else if(myself->maclength < 0) {
- logger(LOG_ERR, _("Bogus MAC length!"));
+ } else if(myself->inmaclength < 0) {
+ logger(LOG_ERR, "Bogus MAC length!");
return false;
}
}
- } else
- myself->maclength = 4;
+ } else {
+ myself->inmaclength = 4;
+ }
myself->connection->outmaclength = 0;
/* Compression */
- if(get_config_int(lookup_config(myself->connection->config_tree, "Compression"),
- &myself->compression)) {
- if(myself->compression < 0 || myself->compression > 11) {
- logger(LOG_ERR, _("Bogus compression level!"));
+ 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;
}
- } else
- myself->compression = 0;
+ } else {
+ myself->incompression = 0;
+ }
myself->connection->outcompression = 0;
graph();
+ if(strictsubnets) {
+ load_all_subnets();
+ }
+
/* 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;
+ } else if(!strcasecmp(type, "multicast")) {
+ devops = multicast_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
+ free(type);
+ }
+
+ if(!devops.setup()) {
return false;
+ }
/* Run tinc-up script to further initialize the tap interface */
- asprintf(&envp[0], "NETNAME=%s", netname ? : "");
- asprintf(&envp[1], "DEVICE=%s", device ? : "");
- asprintf(&envp[2], "INTERFACE=%s", iface ? : "");
- asprintf(&envp[3], "NAME=%s", myself->name);
- envp[4] = NULL;
+ xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
+ xasprintf(&envp[1], "DEVICE=%s", device ? : "");
+ xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
+ xasprintf(&envp[3], "NAME=%s", myself->name);
+#ifdef HAVE_MINGW
+ Sleep(1000);
+#endif
+#ifdef HAVE_CYGWIN
+ sleep(1);
+#endif
execute_script("tinc-up", envp);
- for(i = 0; i < 5; i++)
+ for(i = 0; i < 4; i++) {
free(envp[i]);
+ }
/* Run subnet-up scripts for our own subnets */
/* Open sockets */
- get_config_string(lookup_config(config_tree, "BindToAddress"), &address);
+ if(!do_detach && getenv("LISTEN_FDS")) {
+ sockaddr_t sa;
+ socklen_t salen;
- hint.ai_family = addressfamily;
- hint.ai_socktype = SOCK_STREAM;
- hint.ai_protocol = IPPROTO_TCP;
- hint.ai_flags = AI_PASSIVE;
+ listen_sockets = atoi(getenv("LISTEN_FDS"));
+#ifdef HAVE_UNSETENV
+ unsetenv("LISTEN_FDS");
+#endif
- err = getaddrinfo(address, myport, &hint, &ai);
+ if(listen_sockets > MAXSOCKETS) {
+ logger(LOG_ERR, "Too many listening sockets");
+ return false;
+ }
- if(err || !ai) {
- logger(LOG_ERR, _("System call `%s' failed: %s"), "getaddrinfo",
- gai_strerror(err));
- return false;
- }
+ for(i = 0; i < listen_sockets; i++) {
+ salen = sizeof(sa);
- listen_sockets = 0;
+ 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;
+ }
- for(aip = ai; aip; aip = aip->ai_next) {
- listen_socket[listen_sockets].tcp =
- setup_listen_socket((sockaddr_t *) aip->ai_addr);
+ listen_socket[i].tcp = i + 3;
- if(listen_socket[listen_sockets].tcp < 0)
- continue;
+#ifdef FD_CLOEXEC
+ fcntl(i + 3, F_SETFD, FD_CLOEXEC);
+#endif
- listen_socket[listen_sockets].udp =
- setup_vpn_in_socket((sockaddr_t *) aip->ai_addr);
+ listen_socket[i].udp = setup_vpn_in_socket(&sa);
- if(listen_socket[listen_sockets].udp < 0)
- continue;
+ if(listen_socket[i].udp < 0) {
+ return false;
+ }
+
+ ifdebug(CONNECTIONS) {
+ hostname = sockaddr2hostname(&sa);
+ logger(LOG_NOTICE, "Listening on %s", hostname);
+ free(hostname);
+ }
- ifdebug(CONNECTIONS) {
- hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
- logger(LOG_NOTICE, _("Listening on %s"), hostname);
- free(hostname);
+ memcpy(&listen_socket[i].sa, &sa, salen);
}
+ } else {
+ listen_sockets = 0;
+ cfg = lookup_config(config_tree, "BindToAddress");
- memcpy(&listen_socket[listen_sockets].sa, aip->ai_addr, aip->ai_addrlen);
- listen_sockets++;
- }
+ do {
+ get_config_string(cfg, &address);
+
+ 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, "*")) {
+ *address = 0;
+ }
+ }
+
+ hint.ai_family = addressfamily;
+ hint.ai_socktype = SOCK_STREAM;
+ hint.ai_protocol = IPPROTO_TCP;
+ hint.ai_flags = AI_PASSIVE;
+
+#if HAVE_DECL_RES_INIT
+ // ensure glibc reloads /etc/resolv.conf.
+ res_init();
+#endif
+ err = getaddrinfo(address && *address ? address : NULL, port, &hint, &ai);
+ free(address);
+
+ if(err || !ai) {
+ logger(LOG_ERR, "System call `%s' failed: %s", "getaddrinfo",
+ gai_strerror(err));
+ return false;
+ }
- freeaddrinfo(ai);
+ for(aip = ai; aip; aip = aip->ai_next) {
+ if(listen_sockets >= MAXSOCKETS) {
+ logger(LOG_ERR, "Too many listening sockets");
+ return false;
+ }
- if(listen_sockets)
- logger(LOG_NOTICE, _("Ready"));
- else {
- logger(LOG_ERR, _("Unable to create any listening socket!"));
+ listen_socket[listen_sockets].tcp =
+ setup_listen_socket((sockaddr_t *) aip->ai_addr);
+
+ if(listen_socket[listen_sockets].tcp < 0) {
+ continue;
+ }
+
+ listen_socket[listen_sockets].udp =
+ setup_vpn_in_socket((sockaddr_t *) aip->ai_addr);
+
+ if(listen_socket[listen_sockets].udp < 0) {
+ continue;
+ }
+
+ 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);
+ } while(cfg);
+ }
+
+ if(!listen_sockets) {
+ logger(LOG_ERR, "Unable to create any listening socket!");
return false;
}
+ /* If no Port option was specified, set myport to the port used by the first listening socket. */
+
+ if(!port_specified) {
+ sockaddr_t sa;
+ socklen_t salen = sizeof(sa);
+
+ if(!getsockname(listen_socket[0].udp, &sa.sa, &salen)) {
+ free(myport);
+ sockaddr2str(&sa, NULL, &myport);
+
+ if(!myport) {
+ myport = xstrdup("655");
+ }
+ }
+ }
+
+ /* Done. */
+
+ logger(LOG_NOTICE, "Ready");
return true;
}
/*
- setup all initial network connections
+ initialize network
*/
-bool setup_network_connections(void)
-{
- cp();
-
+bool setup_network(void) {
now = time(NULL);
+ init_events();
init_connections();
init_subnets();
init_nodes();
init_edges();
- init_events();
init_requests();
if(get_config_int(lookup_config(config_tree, "PingInterval"), &pinginterval)) {
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))
- maxoutbufsize = 4 * MTU;
+ if(!get_config_int(lookup_config(config_tree, "MaxOutputBufferSize"), &maxoutbufsize)) {
+ maxoutbufsize = 10 * MTU;
+ }
- if(!setup_myself())
+ if(!setup_myself()) {
return false;
-
- try_outgoing_connections();
+ }
return true;
}
/*
close all open network connections
*/
-void close_network_connections(void)
-{
+void close_network_connections(void) {
avl_node_t *node, *next;
connection_t *c;
- char *envp[5];
+ char *envp[5] = {};
int i;
- cp();
-
for(node = connection_tree->head; node; node = next) {
next = node->next;
c = node->data;
-
- if(c->outgoing)
- free(c->outgoing->name), free(c->outgoing), c->outgoing = NULL;
+ c->outgoing = NULL;
terminate_connection(c, false);
}
+ for(list_node_t *node = outgoing_list->head; node; node = node->next) {
+ outgoing_t *outgoing = node->data;
+
+ if(outgoing->event) {
+ event_del(outgoing->event);
+ }
+ }
+
+ list_delete_list(outgoing_list);
+
if(myself && myself->connection) {
subnet_update(myself, NULL, false);
terminate_connection(myself->connection, false);
+ free_connection(myself->connection);
}
for(i = 0; i < listen_sockets; i++) {
close(listen_socket[i].udp);
}
- asprintf(&envp[0], "NETNAME=%s", netname ? : "");
- asprintf(&envp[1], "DEVICE=%s", device ? : "");
- asprintf(&envp[2], "INTERFACE=%s", iface ? : "");
- asprintf(&envp[3], "NAME=%s", myself->name);
- envp[4] = NULL;
+ xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
+ xasprintf(&envp[1], "DEVICE=%s", device ? : "");
+ xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
+ xasprintf(&envp[3], "NAME=%s", myself->name);
exit_requests();
- exit_events();
exit_edges();
exit_subnets();
exit_nodes();
exit_connections();
+ exit_events();
execute_script("tinc-down", envp);
- for(i = 0; i < 4; i++)
+ if(myport) {
+ free(myport);
+ }
+
+ for(i = 0; i < 4; i++) {
free(envp[i]);
+ }
- close_device();
+ devops.close();
return;
}
projects / tinc / blobdiff