/*
net_setup.c -- Setup.
- Copyright (C) 1998-2003 Ivo Timmermans <ivo@o2w.nl>,
- 2000-2003 Guus Sliepen <guus@sliepen.eu.org>
+ Copyright (C) 1998-2005 Ivo Timmermans,
+ 2000-2009 Guus Sliepen <guus@tinc-vpn.org>
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
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: net_setup.c,v 1.1.2.36 2003/07/18 13:45:06 guus Exp $
+ $Id$
*/
#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 "conf.h"
char *myport;
-int read_rsa_public_key(connection_t *c)
+bool read_rsa_public_key(connection_t *c)
{
FILE *fp;
char *fname;
BN_hex2bn(&c->rsa_key->n, key);
BN_hex2bn(&c->rsa_key->e, "FFFF");
free(key);
- return 0;
+ return true;
}
/* Else, check for PublicKeyFile statement and read it */
- if(get_config_string
- (lookup_config(c->config_tree, "PublicKeyFile"), &fname)) {
- if(is_safe_path(fname)) {
- fp = fopen(fname, "r");
-
- if(!fp) {
- logger(LOG_ERR, _("Error reading RSA public key file `%s': %s"),
- fname, strerror(errno));
- free(fname);
- return -1;
- }
+ if(get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &fname)) {
+ fp = fopen(fname, "r");
+ if(!fp) {
+ logger(LOG_ERR, _("Error reading RSA public key file `%s': %s"),
+ fname, strerror(errno));
free(fname);
- c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
- fclose(fp);
+ return false;
+ }
- if(c->rsa_key)
- return 0; /* Woohoo. */
+ free(fname);
+ c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
+ fclose(fp);
- /* If it fails, try PEM_read_RSA_PUBKEY. */
- fp = fopen(fname, "r");
+ if(c->rsa_key)
+ return true; /* Woohoo. */
- if(!fp) {
- logger(LOG_ERR, _("Error reading RSA public key file `%s': %s"),
- fname, strerror(errno));
- free(fname);
- return -1;
- }
+ /* If it fails, try PEM_read_RSA_PUBKEY. */
+ fp = fopen(fname, "r");
+ if(!fp) {
+ logger(LOG_ERR, _("Error reading RSA public key file `%s': %s"),
+ fname, strerror(errno));
free(fname);
- c->rsa_key = PEM_read_RSA_PUBKEY(fp, &c->rsa_key, NULL, NULL);
- fclose(fp);
+ return false;
+ }
- if(c->rsa_key) {
-// RSA_blinding_on(c->rsa_key, NULL);
- return 0;
- }
+ free(fname);
+ c->rsa_key = PEM_read_RSA_PUBKEY(fp, &c->rsa_key, NULL, NULL);
+ fclose(fp);
- logger(LOG_ERR, _("Reading RSA public key file `%s' failed: %s"),
- fname, strerror(errno));
- return -1;
- } else {
- free(fname);
- return -1;
+ if(c->rsa_key) {
+// RSA_blinding_on(c->rsa_key, NULL);
+ return true;
}
+
+ logger(LOG_ERR, _("Reading RSA public key file `%s' failed: %s"),
+ fname, strerror(errno));
+ return false;
}
/* Else, check if a harnessed public key is in the config file */
- asprintf(&fname, "%s/hosts/%s", confbase, c->name);
+ xasprintf(&fname, "%s/hosts/%s", confbase, c->name);
fp = fopen(fname, "r");
if(fp) {
free(fname);
if(c->rsa_key)
- return 0;
+ return true;
/* Try again with PEM_read_RSA_PUBKEY. */
- asprintf(&fname, "%s/hosts/%s", confbase, c->name);
+ xasprintf(&fname, "%s/hosts/%s", confbase, c->name);
fp = fopen(fname, "r");
if(fp) {
free(fname);
if(c->rsa_key)
- return 0;
+ return true;
logger(LOG_ERR, _("No public key for %s specified!"), c->name);
- return -1;
+ return false;
}
-int read_rsa_private_key(void)
+bool read_rsa_private_key(void)
{
FILE *fp;
- char *fname, *key;
+ char *fname, *key, *pubkey;
+ struct stat s;
cp();
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");
free(key);
- return 0;
+ free(pubkey);
+ return true;
}
if(!get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname))
- asprintf(&fname, "%s/rsa_key.priv", confbase);
+ xasprintf(&fname, "%s/rsa_key.priv", confbase);
- if(is_safe_path(fname)) {
- fp = fopen(fname, "r");
+ fp = fopen(fname, "r");
- if(!fp) {
- logger(LOG_ERR, _("Error reading RSA private key file `%s': %s"),
- fname, strerror(errno));
- free(fname);
- return -1;
- }
+ if(!fp) {
+ 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);
- myself->connection->rsa_key =
- PEM_read_RSAPrivateKey(fp, NULL, NULL, NULL);
- fclose(fp);
+ return false;
+ }
- if(!myself->connection->rsa_key) {
- logger(LOG_ERR, _("Reading RSA private key file `%s' failed: %s"),
- fname, strerror(errno));
- return -1;
- }
+ 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);
- return 0;
+ if(!myself->connection->rsa_key) {
+ logger(LOG_ERR, _("Reading RSA private key file `%s' failed: %s"),
+ fname, strerror(errno));
+ free(fname);
+ return false;
}
free(fname);
- return -1;
+ return true;
}
/*
Configure node_t myself and set up the local sockets (listen only)
*/
-int setup_myself(void)
+bool setup_myself(void)
{
config_t *cfg;
subnet_t *subnet;
char *name, *hostname, *mode, *afname, *cipher, *digest;
char *address = NULL;
- struct addrinfo hint, *ai, *aip;
- int choice, err;
+ char *envp[5];
+ struct addrinfo *ai, *aip, hint = {0};
+ bool choice;
+ int i, err;
cp();
myself->connection = new_connection();
init_configuration(&myself->connection->config_tree);
- asprintf(&myself->hostname, _("MYSELF"));
- asprintf(&myself->connection->hostname, _("MYSELF"));
+ xasprintf(&myself->hostname, _("MYSELF"));
+ xasprintf(&myself->connection->hostname, _("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!"));
- return -1;
+ return false;
}
- if(check_id(name)) {
+ if(!check_id(name)) {
logger(LOG_ERR, _("Invalid name for myself!"));
free(name);
- return -1;
+ return false;
}
myself->name = name;
myself->connection->name = xstrdup(name);
- if(read_rsa_private_key())
- return -1;
-
- if(read_connection_config(myself->connection)) {
+ if(!read_connection_config(myself->connection)) {
logger(LOG_ERR, _("Cannot open host configuration file for myself!"));
- return -1;
+ return false;
}
- if(read_rsa_public_key(myself->connection))
- return -1;
+ if(!read_rsa_private_key())
+ return false;
- if(!get_config_string
- (lookup_config(myself->connection->config_tree, "Port"), &myport))
- asprintf(&myport, "655");
+ if(!get_config_string(lookup_config(myself->connection->config_tree, "Port"), &myport))
+ xasprintf(&myport, "655");
/* Read in all the subnets specified in the host configuration file */
while(cfg) {
if(!get_config_subnet(cfg, &subnet))
- return -1;
+ return false;
subnet_add(myself, subnet);
/* Check some options */
- if(get_config_bool(lookup_config(config_tree, "IndirectData"), &choice))
- if(choice)
- myself->options |= OPTION_INDIRECT;
+ 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))
- if(choice)
- myself->options |= OPTION_TCPONLY;
+ 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))
- if(choice)
- myself->options |= OPTION_INDIRECT;
+ 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))
- if(choice)
- myself->options |= OPTION_TCPONLY;
+ if(get_config_bool(lookup_config(myself->connection->config_tree, "TCPOnly"), &choice) && choice)
+ myself->options |= OPTION_TCPONLY;
if(myself->options & OPTION_TCPONLY)
myself->options |= OPTION_INDIRECT;
+ get_config_bool(lookup_config(config_tree, "TunnelServer"), &tunnelserver);
+
if(get_config_string(lookup_config(config_tree, "Mode"), &mode)) {
if(!strcasecmp(mode, "router"))
routing_mode = RMODE_ROUTER;
routing_mode = RMODE_HUB;
else {
logger(LOG_ERR, _("Invalid routing mode!"));
- return -1;
+ return false;
}
free(mode);
} else
routing_mode = RMODE_ROUTER;
- get_config_bool(lookup_config(config_tree, "PriorityInheritance"),
- &priorityinheritance);
+ // Enable PMTUDiscovery by default if we are in router mode.
+
+ choice = routing_mode == RMODE_ROUTER;
+ get_config_bool(lookup_config(myself->connection->config_tree, "PMTUDiscovery"), &choice);
+ if(choice)
+ myself->options |= OPTION_PMTU_DISCOVERY;
+
+ get_config_bool(lookup_config(config_tree, "PriorityInheritance"), &priorityinheritance);
+
#if !defined(SOL_IP) || !defined(IP_TOS)
if(priorityinheritance)
- logger(LOG_WARNING, _("PriorityInheritance not supported on this platform"));
+ logger(LOG_WARNING, _("%s not supported on this platform"), "PriorityInheritance");
#endif
if(!get_config_int(lookup_config(config_tree, "MACExpire"), &macexpire))
macexpire = 600;
- if(get_config_int
- (lookup_config(myself->connection->config_tree, "MaxTimeout"),
- &maxtimeout)) {
+ if(get_config_int(lookup_config(config_tree, "MaxTimeout"), &maxtimeout)) {
if(maxtimeout <= 0) {
logger(LOG_ERR, _("Bogus maximum timeout!"));
- return -1;
+ return false;
}
} else
maxtimeout = 900;
addressfamily = AF_UNSPEC;
else {
logger(LOG_ERR, _("Invalid address family!"));
- return -1;
+ return false;
}
free(afname);
}
if(get_config_string
(lookup_config(myself->connection->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) {
+ if(!myself->incipher) {
logger(LOG_ERR, _("Unrecognized cipher type!"));
- return -1;
+ return false;
}
}
} else
- myself->cipher = EVP_bf_cbc();
+ myself->incipher = EVP_bf_cbc();
- if(myself->cipher)
- myself->keylength = myself->cipher->key_len + myself->cipher->iv_len;
+ if(myself->incipher)
+ myself->inkeylength = myself->incipher->key_len + myself->incipher->iv_len;
else
- myself->keylength = 1;
+ myself->inkeylength = 1;
myself->connection->outcipher = EVP_bf_ofb();
- myself->key = (char *) xmalloc(myself->keylength);
- RAND_pseudo_bytes(myself->key, myself->keylength);
-
if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime))
keylifetime = 3600;
keyexpires = now + keylifetime;
- EVP_CIPHER_CTX_init(&packet_ctx);
- EVP_DecryptInit_ex(&packet_ctx, myself->cipher, NULL, myself->key, myself->key + myself->cipher->key_len);
-
/* 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(myself->connection->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) {
+ if(!myself->indigest) {
logger(LOG_ERR, _("Unrecognized digest type!"));
- return -1;
+ return false;
}
}
} else
- myself->digest = EVP_sha1();
+ myself->indigest = EVP_sha1();
myself->connection->outdigest = EVP_sha1();
- if(get_config_int
- (lookup_config(myself->connection->config_tree, "MACLength"),
- &myself->maclength)) {
- if(myself->digest) {
- if(myself->maclength > myself->digest->md_size) {
+ if(get_config_int(lookup_config(myself->connection->config_tree, "MACLength"), &myself->inmaclength)) {
+ if(myself->indigest) {
+ if(myself->inmaclength > myself->indigest->md_size) {
logger(LOG_ERR, _("MAC length exceeds size of digest!"));
- return -1;
- } else if(myself->maclength < 0) {
+ return false;
+ } else if(myself->inmaclength < 0) {
logger(LOG_ERR, _("Bogus MAC length!"));
- return -1;
+ return false;
}
}
} else
- myself->maclength = 4;
+ 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) {
+ if(get_config_int(lookup_config(myself->connection->config_tree, "Compression"), &myself->incompression)) {
+ if(myself->incompression < 0 || myself->incompression > 11) {
logger(LOG_ERR, _("Bogus compression level!"));
- return -1;
+ return false;
}
} else
- myself->compression = 0;
+ myself->incompression = 0;
myself->connection->outcompression = 0;
myself->nexthop = myself;
myself->via = myself;
- myself->status.active = 1;
- myself->status.reachable = 1;
+ myself->status.reachable = true;
node_add(myself);
graph();
- /* Open sockets */
+ /* Open device */
+
+ if(!setup_device())
+ return false;
+
+ /* Run tinc-up script to further initialize the tap interface */
+ 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++)
+ free(envp[i]);
- memset(&hint, 0, sizeof(hint));
+ /* Run subnet-up scripts for our own subnets */
+
+ subnet_update(myself, NULL, true);
+
+ /* Open sockets */
get_config_string(lookup_config(config_tree, "BindToAddress"), &address);
if(err || !ai) {
logger(LOG_ERR, _("System call `%s' failed: %s"), "getaddrinfo",
gai_strerror(err));
- return -1;
+ return false;
}
listen_sockets = 0;
free(hostname);
}
- listen_socket[listen_sockets].sa.sa = *aip->ai_addr;
+ memcpy(&listen_socket[listen_sockets].sa, aip->ai_addr, aip->ai_addrlen);
listen_sockets++;
}
logger(LOG_NOTICE, _("Ready"));
else {
logger(LOG_ERR, _("Unable to create any listening socket!"));
- return -1;
+ return false;
}
- return 0;
+ return true;
}
/*
- setup all initial network connections
+ initialize network
*/
-int setup_network_connections(void)
+bool setup_network(void)
{
- char *envp[5];
- int i;
-
cp();
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, "PingTimeout"), &pingtimeout)) {
- if(pingtimeout < 1) {
- pingtimeout = 86400;
+ if(get_config_int(lookup_config(config_tree, "PingInterval"), &pinginterval)) {
+ if(pinginterval < 1) {
+ pinginterval = 86400;
}
} else
- pingtimeout = 60;
+ pinginterval = 60;
- if(setup_device() < 0)
- return -1;
+ if(!get_config_int(lookup_config(config_tree, "PingTimeout"), &pingtimeout))
+ pingtimeout = 5;
+ if(pingtimeout < 1 || pingtimeout > pinginterval)
+ pingtimeout = pinginterval;
- if(setup_myself() < 0)
- return -1;
-
- /* 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;
-
- execute_script("tinc-up", envp);
-
- for(i = 0; i < 5; i++)
- free(envp[i]);
+ if(!get_config_int(lookup_config(config_tree, "MaxOutputBufferSize"), &maxoutbufsize))
+ maxoutbufsize = 10 * MTU;
- try_outgoing_connections();
+ if(!setup_myself())
+ return false;
- return 0;
+ return true;
}
/*
for(node = connection_tree->head; node; node = next) {
next = node->next;
- c = (connection_t *) node->data;
-
- if(c->outgoing)
- free(c->outgoing->name), free(c->outgoing), c->outgoing = NULL;
- terminate_connection(c, 0);
+ c = node->data;
+ c->outgoing = false;
+ terminate_connection(c, false);
}
- if(myself && myself->connection)
- terminate_connection(myself->connection, 0);
+ 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].tcp);
close(listen_socket[i].udp);
}
+ 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();
- exit_events();
exit_edges();
exit_subnets();
exit_nodes();
exit_connections();
-
- 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;
+ exit_events();
execute_script("tinc-down", envp);
+ if(myport) free(myport);
+
for(i = 0; i < 4; i++)
free(envp[i]);
projects / oweals / tinc.git / blobdiff