/*
net_setup.c -- Setup.
Copyright (C) 1998-2005 Ivo Timmermans,
- 2000-2006 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2013 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 <openssl/pem.h>
-#include <openssl/rsa.h>
-#include <openssl/rand.h>
-#include <openssl/err.h>
-#include <openssl/evp.h>
-
-#include "avl_tree.h"
+#include "cipher.h"
#include "conf.h"
#include "connection.h"
+#include "control.h"
#include "device.h"
+#include "digest.h"
+#include "ecdsa.h"
#include "graph.h"
#include "logger.h"
+#include "names.h"
#include "net.h"
#include "netutl.h"
#include "process.h"
#include "protocol.h"
#include "route.h"
+#include "rsa.h"
#include "subnet.h"
#include "utils.h"
#include "xalloc.h"
char *myport;
-static struct event device_ev;
+static io_t device_io;
+devops_t devops;
+
+char *proxyhost;
+char *proxyport;
+char *proxyuser;
+char *proxypass;
+proxytype_t proxytype;
+int autoconnect;
+
+char *scriptinterpreter;
+char *scriptextension;
+
+bool node_read_ecdsa_public_key(node_t *n) {
+ if(ecdsa_active(&n->ecdsa))
+ return true;
-bool read_rsa_public_key(connection_t *c)
-{
+ splay_tree_t *config_tree;
FILE *fp;
- char *fname;
- char *key;
+ char *pubname = NULL, *hcfname = NULL;
+ char *p;
+ bool result = false;
- cp();
+ xasprintf(&hcfname, "%s" SLASH "hosts" SLASH "%s", confbase, n->name);
- if(!c->rsa_key) {
- c->rsa_key = RSA_new();
-// RSA_blinding_on(c->rsa_key, NULL);
- }
+ init_configuration(&config_tree);
+ if(!read_config_file(config_tree, hcfname))
+ goto exit;
- /* First, check for simple PublicKey statement */
+ /* First, check for simple ECDSAPublicKey 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");
- free(key);
- return true;
+ 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 PublicKeyFile statement and read it */
+ /* Else, check for ECDSAPublicKeyFile 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(config_tree, "ECDSAPublicKeyFile"), &pubname))
+ xasprintf(&pubname, "%s" SLASH "hosts" SLASH "%s", confbase, n->name);
- if(!fp) {
- logger(LOG_ERR, _("Error reading RSA public key file `%s': %s"),
- fname, strerror(errno));
- free(fname);
- return false;
- }
+ fp = fopen(pubname, "r");
- free(fname);
- c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
- fclose(fp);
+ if(!fp) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Error reading ECDSA public key file `%s': %s", pubname, strerror(errno));
+ goto exit;
+ }
- if(c->rsa_key)
- return true; /* Woohoo. */
+ result = ecdsa_read_pem_public_key(&n->ecdsa, fp);
+ fclose(fp);
- /* If it fails, try PEM_read_RSA_PUBKEY. */
- fp = fopen(fname, "r");
+exit:
+ exit_configuration(&config_tree);
+ free(hcfname);
+ free(pubname);
+ return result;
+}
- if(!fp) {
- logger(LOG_ERR, _("Error reading RSA public key file `%s': %s"),
- fname, strerror(errno));
- free(fname);
- return false;
- }
+bool read_ecdsa_public_key(connection_t *c) {
+ FILE *fp;
+ char *fname;
+ char *p;
+ bool result;
- free(fname);
- c->rsa_key = PEM_read_RSA_PUBKEY(fp, &c->rsa_key, NULL, NULL);
- fclose(fp);
+ /* First, check for simple ECDSAPublicKey statement */
- if(c->rsa_key) {
-// RSA_blinding_on(c->rsa_key, NULL);
- return true;
- }
+ if(get_config_string(lookup_config(c->config_tree, "ECDSAPublicKey"), &p)) {
+ result = ecdsa_set_base64_public_key(&c->ecdsa, p);
+ free(p);
+ return result;
+ }
- logger(LOG_ERR, _("Reading RSA public key file `%s' failed: %s"),
+ /* Else, check for ECDSAPublicKeyFile statement and read it */
+
+ if(!get_config_string(lookup_config(c->config_tree, "ECDSAPublicKeyFile"), &fname))
+ xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, c->name);
+
+ fp = fopen(fname, "r");
+
+ if(!fp) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Error reading ECDSA public key file `%s': %s",
fname, strerror(errno));
+ free(fname);
return false;
}
- /* Else, check if a harnessed public key is in the config file */
+ result = ecdsa_read_pem_public_key(&c->ecdsa, fp);
+ fclose(fp);
+
+ if(!result)
+ logger(DEBUG_ALWAYS, LOG_ERR, "Parsing ECDSA public key file `%s' failed.", fname);
+ free(fname);
+ return result;
+}
+
+bool read_rsa_public_key(connection_t *c) {
+ FILE *fp;
+ char *fname;
+ char *n;
+ bool result;
+
+ /* First, check for simple PublicKey statement */
+
+ if(get_config_string(lookup_config(c->config_tree, "PublicKey"), &n)) {
+ result = rsa_set_hex_public_key(&c->rsa, n, "FFFF");
+ free(n);
+ return result;
+ }
+
+ /* 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);
- asprintf(&fname, "%s/hosts/%s", confbase, c->name);
fp = fopen(fname, "r");
- if(fp) {
- c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
- fclose(fp);
+ if(!fp) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Error reading RSA public key file `%s': %s", fname, strerror(errno));
+ free(fname);
+ return false;
}
+ result = rsa_read_pem_public_key(&c->rsa, fp);
+ fclose(fp);
+
+ if(!result)
+ logger(DEBUG_ALWAYS, LOG_ERR, "Reading RSA public key file `%s' failed: %s", fname, strerror(errno));
free(fname);
+ return result;
+}
- if(c->rsa_key)
- return true;
+static bool read_ecdsa_private_key(void) {
+ FILE *fp;
+ char *fname;
+ bool result;
+
+ /* Check for PrivateKeyFile statement and read it */
- /* Try again with PEM_read_RSA_PUBKEY. */
+ if(!get_config_string(lookup_config(config_tree, "ECDSAPrivateKeyFile"), &fname))
+ xasprintf(&fname, "%s" SLASH "ecdsa_key.priv", confbase);
- asprintf(&fname, "%s/hosts/%s", confbase, c->name);
fp = fopen(fname, "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(DEBUG_ALWAYS, LOG_ERR, "Error reading ECDSA private key file `%s': %s", fname, strerror(errno));
+ free(fname);
+ return false;
}
- free(fname);
+#if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN)
+ struct stat s;
- if(c->rsa_key)
- return true;
+ if(fstat(fileno(fp), &s)) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Could not stat ECDSA private key file `%s': %s'", fname, strerror(errno));
+ free(fname);
+ return false;
+ }
- logger(LOG_ERR, _("No public key for %s specified!"), c->name);
+ if(s.st_mode & ~0100700)
+ logger(DEBUG_ALWAYS, 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);
- return false;
+ if(!result)
+ logger(DEBUG_ALWAYS, LOG_ERR, "Reading ECDSA private key file `%s' failed: %s", fname, strerror(errno));
+ free(fname);
+ return result;
}
-bool read_rsa_private_key(void)
-{
+static bool read_rsa_private_key(void) {
FILE *fp;
- char *fname, *key, *pubkey;
- struct stat s;
+ char *fname;
+ char *n, *d;
+ bool result;
- cp();
+ /* First, check for simple PrivateKey statement */
- 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!"));
+ 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_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");
- free(key);
- free(pubkey);
- return true;
+ result = rsa_set_hex_private_key(&myself->connection->rsa, n, "FFFF", d);
+ free(n);
+ free(d);
+ return result;
}
+ /* Else, check for PrivateKeyFile statement and read it */
+
if(!get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname))
- asprintf(&fname, "%s/rsa_key.priv", confbase);
+ xasprintf(&fname, "%s" SLASH "rsa_key.priv", confbase);
fp = fopen(fname, "r");
if(!fp) {
- logger(LOG_ERR, _("Error reading RSA private key file `%s': %s"),
+ logger(DEBUG_ALWAYS, LOG_ERR, "Error reading RSA 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 RSA private key file `%s': %s'"),
- fname, strerror(errno));
+ 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(LOG_WARNING, _("Warning: insecure file permissions for RSA private key file `%s'!"), fname);
+ logger(DEBUG_ALWAYS, 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);
+ result = rsa_read_pem_private_key(&myself->connection->rsa, fp);
fclose(fp);
- if(!myself->connection->rsa_key) {
- logger(LOG_ERR, _("Reading RSA private key file `%s' failed: %s"),
- fname, strerror(errno));
- free(fname);
- return false;
- }
-
+ if(!result)
+ logger(DEBUG_ALWAYS, LOG_ERR, "Reading RSA private key file `%s' failed: %s", fname, strerror(errno));
free(fname);
- return true;
+ return result;
}
-static struct event keyexpire_event;
+static timeout_t keyexpire_timeout;
-static void keyexpire_handler(int fd, short events, void *data) {
+static void keyexpire_handler(void *data) {
regenerate_key();
+ timeout_set(data, &(struct timeval){keylifetime, rand() % 100000});
}
-void regenerate_key() {
- RAND_pseudo_bytes((unsigned char *)myself->key, myself->keylength);
+void regenerate_key(void) {
+ logger(DEBUG_STATUS, LOG_INFO, "Expiring symmetric keys");
+ send_key_changed();
+}
- if(timeout_initialized(&keyexpire_event)) {
- ifdebug(STATUS) logger(LOG_INFO, _("Regenerating symmetric key"));
- event_del(&keyexpire_event);
- send_key_changed(broadcast, myself);
- } else {
- timeout_set(&keyexpire_event, keyexpire_handler, NULL);
+/*
+ Read Subnets from all host config files
+*/
+void load_all_subnets(void) {
+ DIR *dir;
+ struct dirent *ent;
+ char *dname;
+
+ xasprintf(&dname, "%s" SLASH "hosts", confbase);
+ dir = opendir(dname);
+ if(!dir) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Could not open %s: %s", dname, strerror(errno));
+ free(dname);
+ return;
}
- event_add(&keyexpire_event, &(struct timeval){keylifetime, 0});
+ while((ent = readdir(dir))) {
+ if(!check_id(ent->d_name))
+ continue;
+
+ node_t *n = lookup_node(ent->d_name);
+ #ifdef _DIRENT_HAVE_D_TYPE
+ //if(ent->d_type != DT_REG)
+ // continue;
+ #endif
- 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));
- abort();
+ char *fname;
+ xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, ent->d_name);
+
+ splay_tree_t *config_tree;
+ 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(config_t *cfg = lookup_config(config_tree, "Subnet"); cfg; cfg = lookup_config_next(config_tree, cfg)) {
+ subnet_t *s, *s2;
+
+ 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);
}
-/*
- Configure node_t myself and set up the local sockets (listen only)
-*/
-bool setup_myself(void)
-{
- config_t *cfg;
- subnet_t *subnet;
- char *name, *hostname, *mode, *afname, *cipher, *digest;
- char *address = NULL;
- char *envp[5];
- struct addrinfo *ai, *aip, hint = {0};
- bool choice;
- int i, err;
+void load_all_nodes(void) {
+ DIR *dir;
+ struct dirent *ent;
+ char *dname;
+
+ xasprintf(&dname, "%s" SLASH "hosts", confbase);
+ dir = opendir(dname);
+ if(!dir) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Could not open %s: %s", dname, strerror(errno));
+ free(dname);
+ return;
+ }
- cp();
+ while((ent = readdir(dir))) {
+ if(!check_id(ent->d_name))
+ continue;
- myself = new_node();
- myself->connection = new_connection();
- init_configuration(&myself->connection->config_tree);
+ node_t *n = lookup_node(ent->d_name);
+ if(n)
+ continue;
- asprintf(&myself->hostname, _("MYSELF"));
- asprintf(&myself->connection->hostname, _("MYSELF"));
+ n = new_node();
+ n->name = xstrdup(ent->d_name);
+ node_add(n);
+ }
- myself->connection->options = 0;
- myself->connection->protocol_version = PROT_CURRENT;
+ closedir(dir);
+}
- if(!get_config_string(lookup_config(config_tree, "Name"), &name)) { /* Not acceptable */
- logger(LOG_ERR, _("Name for tinc daemon required!"));
- return false;
+
+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);
+ if(!envname) {
+ if(strcmp(name + 1, "HOST")) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Invalid Name: environment variable %s does not exist\n", name + 1);
+ return false;
+ }
+ char envname[32];
+ if(gethostname(envname, 32)) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Could not get hostname: %s\n", strerror(errno));
+ return false;
+ }
+ envname[31] = 0;
+ }
+ 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!"));
+ logger(DEBUG_ALWAYS, LOG_ERR, "Invalid name for myself!");
free(name);
return false;
}
- myself->name = name;
- myself->connection->name = xstrdup(name);
-
- if(!read_connection_config(myself->connection)) {
- logger(LOG_ERR, _("Cannot open host configuration file for myself!"));
- return false;
- }
+ return name;
+}
- if(!read_rsa_private_key())
- return false;
+bool setup_myself_reloadable(void) {
+ char *proxy = NULL;
+ char *rmode = NULL;
+ char *fmode = NULL;
+ char *bmode = NULL;
+ char *afname = NULL;
+ char *space;
+ bool choice;
- if(!get_config_string(lookup_config(myself->connection->config_tree, "Port"), &myport))
- asprintf(&myport, "655");
+ free(scriptinterpreter);
+ scriptinterpreter = NULL;
+ get_config_string(lookup_config(config_tree, "ScriptsInterpreter"), &scriptinterpreter);
- /* Read in all the subnets specified in the host configuration file */
- cfg = lookup_config(myself->connection->config_tree, "Subnet");
+ free(scriptextension);
+ if(!get_config_string(lookup_config(config_tree, "ScriptsExtension"), &scriptextension))
+#ifdef HAVE_MINGW
+ scriptextension = xstrdup(".bat");
+#else
+ scriptextension = xstrdup("");
+#endif
- while(cfg) {
- if(!get_config_subnet(cfg, &subnet))
+ get_config_string(lookup_config(config_tree, "Proxy"), &proxy);
+ if(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(DEBUG_ALWAYS, LOG_ERR, "Unknown proxy type %s!", proxy);
return false;
+ }
- subnet_add(myself, subnet);
+ switch(proxytype) {
+ case PROXY_NONE:
+ default:
+ break;
+
+ case PROXY_EXEC:
+ if(!space || !*space) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Argument expected for proxy type exec!");
+ 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(DEBUG_ALWAYS, LOG_ERR, "Host and port argument expected for proxy!");
+ return false;
+ }
+ proxyhost = xstrdup(proxyhost);
+ proxyport = xstrdup(proxyport);
+ if(proxyuser && *proxyuser)
+ proxyuser = xstrdup(proxyuser);
+ if(proxypass && *proxypass)
+ proxypass = xstrdup(proxypass);
+ break;
+ }
- cfg = lookup_config_next(myself->connection->config_tree, cfg);
+ free(proxy);
}
- /* 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)
- myself->options |= OPTION_INDIRECT;
-
- if(get_config_bool(lookup_config(myself->connection->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)
myself->options |= OPTION_INDIRECT;
- get_config_bool(lookup_config(config_tree, "TunnelServer"), &tunnelserver);
+ get_config_bool(lookup_config(config_tree, "DirectOnly"), &directonly);
+ get_config_bool(lookup_config(config_tree, "LocalDiscovery"), &localdiscovery);
- if(get_config_string(lookup_config(config_tree, "Mode"), &mode)) {
- if(!strcasecmp(mode, "router"))
+ if(get_config_string(lookup_config(config_tree, "Mode"), &rmode)) {
+ if(!strcasecmp(rmode, "router"))
routing_mode = RMODE_ROUTER;
- else if(!strcasecmp(mode, "switch"))
+ else if(!strcasecmp(rmode, "switch"))
routing_mode = RMODE_SWITCH;
- else if(!strcasecmp(mode, "hub"))
+ else if(!strcasecmp(rmode, "hub"))
routing_mode = RMODE_HUB;
else {
- logger(LOG_ERR, _("Invalid routing mode!"));
+ logger(DEBUG_ALWAYS, LOG_ERR, "Invalid routing mode!");
return false;
}
- free(mode);
- } else
- routing_mode = RMODE_ROUTER;
+ free(rmode);
+ }
+
+ if(get_config_string(lookup_config(config_tree, "Forwarding"), &fmode)) {
+ if(!strcasecmp(fmode, "off"))
+ forwarding_mode = FMODE_OFF;
+ else if(!strcasecmp(fmode, "internal"))
+ forwarding_mode = FMODE_INTERNAL;
+ else if(!strcasecmp(fmode, "kernel"))
+ forwarding_mode = FMODE_KERNEL;
+ else {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Invalid forwarding mode!");
+ return false;
+ }
+ free(fmode);
+ }
+
+ choice = true;
+ 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"), &bmode)) {
+ if(!strcasecmp(bmode, "no"))
+ broadcast_mode = BMODE_NONE;
+ else if(!strcasecmp(bmode, "yes") || !strcasecmp(bmode, "mst"))
+ broadcast_mode = BMODE_MST;
+ else if(!strcasecmp(bmode, "direct"))
+ broadcast_mode = BMODE_DIRECT;
+ else {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Invalid broadcast mode!");
+ return false;
+ }
+ free(bmode);
+ }
#if !defined(SOL_IP) || !defined(IP_TOS)
if(priorityinheritance)
- logger(LOG_WARNING, _("PriorityInheritance not supported on this platform"));
+ logger(DEBUG_ALWAYS, LOG_WARNING, "%s not supported on this platform", "PriorityInheritance");
#endif
if(!get_config_int(lookup_config(config_tree, "MACExpire"), &macexpire))
if(get_config_int(lookup_config(config_tree, "MaxTimeout"), &maxtimeout)) {
if(maxtimeout <= 0) {
- logger(LOG_ERR, _("Bogus maximum timeout!"));
+ logger(DEBUG_ALWAYS, LOG_ERR, "Bogus maximum timeout!");
return false;
}
} else
else if(!strcasecmp(afname, "any"))
addressfamily = AF_UNSPEC;
else {
- logger(LOG_ERR, _("Invalid address family!"));
+ logger(DEBUG_ALWAYS, LOG_ERR, "Invalid address family!");
return false;
}
free(afname);
get_config_bool(lookup_config(config_tree, "Hostnames"), &hostnames);
- /* Generate packet encryption key */
+ if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime))
+ keylifetime = 3600;
- if(get_config_string
- (lookup_config(myself->connection->config_tree, "Cipher"), &cipher)) {
- if(!strcasecmp(cipher, "none")) {
- myself->cipher = NULL;
- } else {
- myself->cipher = EVP_get_cipherbyname(cipher);
+ get_config_int(lookup_config(config_tree, "AutoConnect"), &autoconnect);
- if(!myself->cipher) {
- logger(LOG_ERR, _("Unrecognized cipher type!"));
- return false;
- }
- }
- } else
- myself->cipher = EVP_bf_cbc();
+ return true;
+}
+
+/*
+ Configure node_t myself and set up the local sockets (listen only)
+*/
+static bool setup_myself(void) {
+ char *name, *hostname, *cipher, *digest, *type;
+ char *fname = NULL;
+ char *address = NULL;
- if(myself->cipher)
- myself->keylength = myself->cipher->key_len + myself->cipher->iv_len;
- else
- myself->keylength = 1;
+ if(!(name = get_name())) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Name for tinc daemon required!");
+ return false;
+ }
- myself->connection->outcipher = EVP_bf_ofb();
+ myself = new_node();
+ myself->connection = new_connection();
+ myself->name = name;
+ myself->connection->name = xstrdup(name);
+ xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, name);
+ read_config_options(config_tree, name);
+ read_config_file(config_tree, fname);
+ free(fname);
- myself->key = xmalloc(myself->keylength);
+ if(!get_config_string(lookup_config(config_tree, "Port"), &myport))
+ myport = xstrdup("655");
- if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime))
- keylifetime = 3600;
+ xasprintf(&myself->hostname, "MYSELF port %s", myport);
+ myself->connection->hostname = xstrdup(myself->hostname);
- regenerate_key();
- /* Check if we want to use message authentication codes... */
+ myself->connection->options = 0;
+ myself->connection->protocol_major = PROT_MAJOR;
+ myself->connection->protocol_minor = PROT_MINOR;
- if(get_config_string
- (lookup_config(myself->connection->config_tree, "Digest"), &digest)) {
- if(!strcasecmp(digest, "none")) {
- myself->digest = NULL;
- } else {
- myself->digest = EVP_get_digestbyname(digest);
+ myself->options |= PROT_MINOR << 24;
- if(!myself->digest) {
- logger(LOG_ERR, _("Unrecognized digest type!"));
- return false;
- }
+ get_config_bool(lookup_config(config_tree, "ExperimentalProtocol"), &experimental);
+
+ if(experimental && !read_ecdsa_private_key())
+ return false;
+
+ if(!read_rsa_private_key())
+ return false;
+
+ 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);
+ }
+
+ /* Read in all the subnets specified in the host configuration file */
+
+ for(config_t *cfg = lookup_config(config_tree, "Subnet"); cfg; cfg = lookup_config_next(config_tree, cfg)) {
+ subnet_t *subnet;
+
+ if(!get_config_subnet(cfg, &subnet))
+ return false;
+
+ subnet_add(myself, subnet);
+ }
+
+ /* Check some options */
+
+ if(!setup_myself_reloadable())
+ return false;
+
+ get_config_bool(lookup_config(config_tree, "StrictSubnets"), &strictsubnets);
+ get_config_bool(lookup_config(config_tree, "TunnelServer"), &tunnelserver);
+ strictsubnets |= tunnelserver;
+
+
+
+ if(get_config_int(lookup_config(config_tree, "UDPRcvBuf"), &udp_rcvbuf)) {
+ if(udp_rcvbuf <= 0) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "UDPRcvBuf cannot be negative!");
+ return false;
}
- } else
- myself->digest = EVP_sha1();
+ }
- myself->connection->outdigest = EVP_sha1();
+ if(get_config_int(lookup_config(config_tree, "UDPSndBuf"), &udp_sndbuf)) {
+ if(udp_sndbuf <= 0) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "UDPSndBuf cannot be negative!");
+ return false;
+ }
+ }
- 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!"));
- return false;
- } else if(myself->maclength < 0) {
- logger(LOG_ERR, _("Bogus MAC length!"));
- return false;
- }
+ int replaywin_int;
+ if(get_config_int(lookup_config(config_tree, "ReplayWindow"), &replaywin_int)) {
+ if(replaywin_int < 0) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "ReplayWindow cannot be negative!");
+ return false;
}
- } else
- myself->maclength = 4;
+ replaywin = (unsigned)replaywin_int;
+ sptps_replaywin = replaywin;
+ }
+
+ /* Generate packet encryption key */
+
+ if(!get_config_string(lookup_config(config_tree, "Cipher"), &cipher))
+ cipher = xstrdup("blowfish");
+
+ if(!cipher_open_by_name(&myself->incipher, cipher)) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Unrecognized cipher type!");
+ return false;
+ }
- myself->connection->outmaclength = 0;
+ free(cipher);
+
+ send_key_changed();
+ timeout_add(&keyexpire_timeout, keyexpire_handler, &keyexpire_timeout, &(struct timeval){keylifetime, rand() % 100000});
+
+ /* Check if we want to use message authentication codes... */
+
+ int maclength = 4;
+ get_config_int(lookup_config(config_tree, "MACLength"), &maclength);
+
+ if(maclength < 0) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Bogus MAC length!");
+ 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(DEBUG_ALWAYS, LOG_ERR, "Unrecognized digest type!");
+ return false;
+ }
+
+ free(digest);
/* 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(DEBUG_ALWAYS, LOG_ERR, "Bogus compression level!");
return false;
}
} else
- myself->compression = 0;
+ myself->incompression = 0;
myself->connection->outcompression = 0;
myself->nexthop = myself;
myself->via = myself;
myself->status.reachable = true;
+ myself->last_state_change = time(NULL);
+ myself->status.sptps = experimental;
node_add(myself);
graph();
+ if(strictsubnets)
+ load_all_subnets();
+ else if(autoconnect)
+ load_all_nodes();
+
/* Open device */
- if(!setup_device())
- return false;
+ 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
+ }
- event_set(&device_ev, device_fd, EV_READ|EV_PERSIST,
- handle_device_data, NULL);
- if (event_add(&device_ev, NULL) < 0) {
- logger(LOG_ERR, _("event_add failed: %s"), strerror(errno));
- close_device();
+ if(!devops.setup())
return false;
- }
+
+ if(device_fd >= 0)
+ io_add(&device_io, handle_device_data, NULL, device_fd, IO_READ);
/* 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);
+ char *envp[5];
+ 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);
envp[4] = NULL;
execute_script("tinc-up", envp);
- for(i = 0; i < 5; i++)
+ for(int 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);
+#ifndef HAVE_MINGW
+ int unix_fd = socket(AF_UNIX, SOCK_STREAM, 0);
+ if(unix_fd < 0) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Could not create UNIX socket: %s", sockstrerror(errno));
+ return false;
+ }
+
+ struct sockaddr_un sa;
+ sa.sun_family = AF_UNIX;
+ strncpy(sa.sun_path, unixsocketname, sizeof sa.sun_path);
- hint.ai_family = addressfamily;
- hint.ai_socktype = SOCK_STREAM;
- hint.ai_protocol = IPPROTO_TCP;
- hint.ai_flags = AI_PASSIVE;
+ if(connect(unix_fd, (struct sockaddr *)&sa, sizeof sa) >= 0) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "UNIX socket %s is still in use!", unixsocketname);
+ return false;
+ }
- err = getaddrinfo(address, myport, &hint, &ai);
+ unlink(unixsocketname);
- if(err || !ai) {
- logger(LOG_ERR, _("System call `%s' failed: %s"), "getaddrinfo",
- gai_strerror(err));
+ if(bind(unix_fd, (struct sockaddr *)&sa, sizeof sa) < 0) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Could not bind UNIX socket to %s: %s", unixsocketname, sockstrerror(errno));
return false;
}
- listen_sockets = 0;
+ if(listen(unix_fd, 3) < 0) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Could not listen on UNIX socket %s: %s", unixsocketname, 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);
+ io_add(&unix_socket, handle_new_unix_connection, &unix_socket, unix_fd, IO_READ);
+#endif
- if(listen_socket[listen_sockets].tcp < 0)
- continue;
+ if(!do_detach && getenv("LISTEN_FDS")) {
+ sockaddr_t sa;
+ socklen_t salen;
- listen_socket[listen_sockets].udp =
- setup_vpn_in_socket((sockaddr_t *) aip->ai_addr);
+ listen_sockets = atoi(getenv("LISTEN_FDS"));
+#ifdef HAVE_UNSETENV
+ unsetenv("LISTEN_FDS");
+#endif
- if(listen_socket[listen_sockets].udp < 0) {
- close(listen_socket[listen_sockets].tcp);
- continue;
+ if(listen_sockets > MAXSOCKETS) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Too many listening sockets");
+ return false;
}
- 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_WARNING, _("event_add failed: %s"), strerror(errno));
- close(listen_socket[listen_sockets].tcp);
- close(listen_socket[listen_sockets].udp);
- continue;
- }
+ for(int i = 0; i < listen_sockets; i++) {
+ salen = sizeof sa;
+ if(getsockname(i + 3, &sa.sa, &salen) < 0) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Could not get address of listen fd %d: %s", i + 3, sockstrerror(errno));
+ return false;
+ }
- 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_WARNING, _("event_add failed: %s"), strerror(errno));
- close(listen_socket[listen_sockets].tcp);
- close(listen_socket[listen_sockets].udp);
- event_del(&listen_socket[listen_sockets].ev_tcp);
- continue;
- }
+#ifdef FD_CLOEXEC
+ fcntl(i + 3, F_SETFD, FD_CLOEXEC);
+#endif
- ifdebug(CONNECTIONS) {
- hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
- logger(LOG_NOTICE, _("Listening on %s"), hostname);
- free(hostname);
- }
+ int udp_fd = setup_vpn_in_socket(&sa);
+ if(udp_fd < 0)
+ return false;
- memcpy(&listen_socket[listen_sockets].sa, aip->ai_addr, aip->ai_addrlen);
- listen_sockets++;
+ io_add(&listen_socket[i].tcp, (io_cb_t)handle_new_meta_connection, &listen_socket[i], i + 3, IO_READ);
+ io_add(&listen_socket[i].udp, (io_cb_t)handle_incoming_vpn_data, &listen_socket[i], udp_fd, IO_READ);
- if(listen_sockets >= MAXSOCKETS) {
- logger(LOG_WARNING, _("Maximum of %d listening sockets reached"), MAXSOCKETS);
- break;
+ if(debug_level >= DEBUG_CONNECTIONS) {
+ hostname = sockaddr2hostname(&sa);
+ logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Listening on %s", hostname);
+ free(hostname);
+ }
+
+ memcpy(&listen_socket[i].sa, &sa, salen);
}
- }
+ } else {
+ listen_sockets = 0;
+ config_t *cfg = lookup_config(config_tree, "BindToAddress");
+
+ 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;
+ }
+
+ struct addrinfo *ai, hint = {0};
+ hint.ai_family = addressfamily;
+ hint.ai_socktype = SOCK_STREAM;
+ hint.ai_protocol = IPPROTO_TCP;
+ hint.ai_flags = AI_PASSIVE;
+
+ int err = getaddrinfo(address && *address ? address : NULL, port, &hint, &ai);
+ free(address);
+
+ if(err || !ai) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "getaddrinfo",
+ gai_strerror(err));
+ return false;
+ }
+
+ for(struct addrinfo *aip = ai; aip; aip = aip->ai_next) {
+ if(listen_sockets >= MAXSOCKETS) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Too many listening sockets");
+ return false;
+ }
+
+ int tcp_fd = setup_listen_socket((sockaddr_t *) aip->ai_addr);
+
+ if(tcp_fd < 0)
+ continue;
+
+ int udp_fd = setup_vpn_in_socket((sockaddr_t *) aip->ai_addr);
- freeaddrinfo(ai);
+ if(tcp_fd < 0) {
+ close(tcp_fd);
+ continue;
+ }
+
+ io_add(&listen_socket[listen_sockets].tcp, handle_new_meta_connection, &listen_socket[listen_sockets], tcp_fd, IO_READ);
+ io_add(&listen_socket[listen_sockets].udp, handle_incoming_vpn_data, &listen_socket[listen_sockets], udp_fd, IO_READ);
+
+ if(debug_level >= DEBUG_CONNECTIONS) {
+ hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
+ logger(DEBUG_CONNECTIONS, 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_NOTICE, _("Ready"));
+ logger(DEBUG_ALWAYS, LOG_NOTICE, "Ready");
else {
- logger(LOG_ERR, _("Unable to create any listening socket!"));
+ logger(DEBUG_ALWAYS, LOG_ERR, "Unable to create any listening socket!");
return false;
}
+ last_config_check = time(NULL);
+
return true;
}
/*
- setup all initial network connections
+ initialize network
*/
-bool setup_network_connections(void)
-{
- cp();
-
+bool setup_network(void) {
init_connections();
init_subnets();
init_nodes();
pingtimeout = pinginterval;
if(!get_config_int(lookup_config(config_tree, "MaxOutputBufferSize"), &maxoutbufsize))
- maxoutbufsize = 4 * MTU;
+ maxoutbufsize = 10 * MTU;
if(!setup_myself())
return false;
- try_outgoing_connections();
-
return true;
}
/*
close all open network connections
*/
-void close_network_connections(void)
-{
- avl_node_t *node, *next;
- connection_t *c;
- char *envp[5];
- int i;
-
- cp();
-
- for(node = connection_tree->head; node; node = next) {
+void close_network_connections(void) {
+ for(list_node_t *node = connection_list->head, *next; node; node = next) {
next = node->next;
- c = node->data;
-
- if(c->outgoing) {
- if(c->outgoing->ai)
- freeaddrinfo(c->outgoing->ai);
- free(c->outgoing->name);
- free(c->outgoing);
- c->outgoing = NULL;
- }
-
+ connection_t *c = node->data;
+ /* Keep control connections open until the end, so they know when we really terminated */
+ if(c->status.control)
+ c->socket = -1;
+ c->outgoing = NULL;
terminate_connection(c, false);
}
+ 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++) {
- event_del(&listen_socket[i].ev_tcp);
- event_del(&listen_socket[i].ev_udp);
- close(listen_socket[i].tcp);
- close(listen_socket[i].udp);
+ for(int i = 0; i < listen_sockets; i++) {
+ io_del(&listen_socket[i].tcp);
+ io_del(&listen_socket[i].udp);
+ close(listen_socket[i].tcp.fd);
+ close(listen_socket[i].udp.fd);
}
- 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);
+#ifndef HAVE_MINGW
+ io_del(&unix_socket);
+ close(unix_socket.fd);
+#endif
+
+ char *envp[5];
+ 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);
envp[4] = NULL;
exit_requests();
execute_script("tinc-down", envp);
- for(i = 0; i < 4; i++)
+ if(myport) free(myport);
+
+ for(int i = 0; i < 4; i++)
free(envp[i]);
- close_device();
+ devops.close();
return;
}