/*
net_setup.c -- Setup.
- Copyright (C) 1998-2002 Ivo Timmermans <ivo@o2w.nl>,
- 2000-2002 Guus Sliepen <guus@sliepen.eu.org>
+ Copyright (C) 1998-2003 Ivo Timmermans <ivo@o2w.nl>,
+ 2000-2003 Guus Sliepen <guus@sliepen.eu.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 1.1.2.26 2002/09/09 22:32:44 guus Exp $
+ $Id: net_setup.c,v 1.1.2.46 2003/11/17 15:30:17 guus Exp $
*/
-#include "config.h"
-
-#include <errno.h>
-#include <fcntl.h>
-#include <netdb.h>
-#include <netinet/in.h>
-#ifdef HAVE_NETINET_IN_SYSTM_H
-#include <netinet/in_systm.h>
-#endif
-#ifdef HAVE_NETINET_IP_H
-#include <netinet/ip.h>
-#endif
-#ifdef HAVE_NETINET_TCP_H
-#include <netinet/tcp.h>
-#endif
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <signal.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <syslog.h>
-#include <unistd.h>
-#include <sys/ioctl.h>
-/* SunOS really wants sys/socket.h BEFORE net/if.h,
- and FreeBSD wants these lines below the rest. */
-#include <arpa/inet.h>
-#include <sys/socket.h>
-#include <net/if.h>
+#include "system.h"
#include <openssl/pem.h>
#include <openssl/rsa.h>
#include <openssl/rand.h>
+#include <openssl/err.h>
+#include <openssl/evp.h>
-#include <utils.h>
-#include <xalloc.h>
-#include <avl_tree.h>
-#include <list.h>
-
+#include "avl_tree.h"
#include "conf.h"
#include "connection.h"
-#include "meta.h"
+#include "device.h"
+#include "event.h"
+#include "graph.h"
+#include "logger.h"
#include "net.h"
#include "netutl.h"
#include "process.h"
#include "protocol.h"
-#include "subnet.h"
-#include "graph.h"
-#include "process.h"
#include "route.h"
-#include "device.h"
-#include "event.h"
-
-#include "system.h"
+#include "subnet.h"
+#include "utils.h"
+#include "xalloc.h"
char *myport;
-int read_rsa_public_key(connection_t *c)
+bool read_rsa_public_key(connection_t *c)
{
FILE *fp;
char *fname;
cp();
- if(!c->rsa_key)
+ if(!c->rsa_key) {
c->rsa_key = RSA_new();
+// RSA_blinding_on(c->rsa_key, NULL);
+ }
/* First, check for simple PublicKey statement */
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) {
- syslog(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) {
- syslog(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)
- return 0;
+ free(fname);
+ c->rsa_key = PEM_read_RSA_PUBKEY(fp, &c->rsa_key, NULL, NULL);
+ fclose(fp);
- syslog(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 */
free(fname);
if(c->rsa_key)
- return 0;
+ return true;
/* Try again with PEM_read_RSA_PUBKEY. */
if(fp) {
c->rsa_key = PEM_read_RSA_PUBKEY(fp, &c->rsa_key, NULL, NULL);
+// RSA_blinding_on(c->rsa_key, NULL);
fclose(fp);
}
free(fname);
if(c->rsa_key)
- return 0;
+ return true;
- syslog(LOG_ERR, _("No public key for %s specified!"), c->name);
+ 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;
+ struct stat s;
cp();
if(get_config_string(lookup_config(config_tree, "PrivateKey"), &key)) {
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->e, "FFFF");
free(key);
- return 0;
+ return true;
}
if(!get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname))
asprintf(&fname, "%s/rsa_key.priv", confbase);
- if(is_safe_path(fname)) {
- fp = fopen(fname, "r");
+ fp = fopen(fname, "r");
- if(!fp) {
- syslog(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) {
- syslog(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->protocol_version = PROT_CURRENT;
if(!get_config_string(lookup_config(config_tree, "Name"), &name)) { /* Not acceptable */
- syslog(LOG_ERR, _("Name for tinc daemon required!"));
- return -1;
+ logger(LOG_ERR, _("Name for tinc daemon required!"));
+ return false;
}
- if(check_id(name)) {
- syslog(LOG_ERR, _("Invalid name for myself!"));
+ 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_rsa_private_key())
+ return false;
- if(read_connection_config(myself->connection)) {
- syslog(LOG_ERR, _("Cannot open host configuration file for myself!"));
- return -1;
+ if(!read_connection_config(myself->connection)) {
+ logger(LOG_ERR, _("Cannot open host configuration file for myself!"));
+ return false;
}
- if(read_rsa_public_key(myself->connection))
- return -1;
+ if(!read_rsa_public_key(myself->connection))
+ return false;
if(!get_config_string
(lookup_config(myself->connection->config_tree, "Port"), &myport))
while(cfg) {
if(!get_config_subnet(cfg, &subnet))
- return -1;
+ return false;
subnet_add(myself, subnet);
if(choice)
myself->options |= OPTION_TCPONLY;
- if(get_config_bool
- (lookup_config(myself->connection->config_tree, "IndirectData"),
- &choice))
+ 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, "TCPOnly"), &choice))
+ if(get_config_bool(lookup_config(myself->connection->config_tree, "TCPOnly"), &choice))
if(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;
else if(!strcasecmp(mode, "hub"))
routing_mode = RMODE_HUB;
else {
- syslog(LOG_ERR, _("Invalid routing mode!"));
- return -1;
+ logger(LOG_ERR, _("Invalid routing mode!"));
+ return false;
}
free(mode);
} else
routing_mode = RMODE_ROUTER;
- get_config_bool(lookup_config(config_tree, "PriorityInheritance"),
- &priorityinheritance);
+ get_config_bool(lookup_config(config_tree, "PriorityInheritance"), &priorityinheritance);
+
#if !defined(SOL_IP) || !defined(IP_TOS)
if(priorityinheritance)
- syslog(LOG_WARNING, _("PriorityInheritance not supported on this platform"));
+ logger(LOG_WARNING, _("PriorityInheritance not supported on this platform"));
#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(myself->connection->config_tree, "MaxTimeout"), &maxtimeout)) {
if(maxtimeout <= 0) {
- syslog(LOG_ERR, _("Bogus maximum timeout!"));
- return -1;
+ logger(LOG_ERR, _("Bogus maximum timeout!"));
+ return false;
}
} else
maxtimeout = 900;
else if(!strcasecmp(afname, "any"))
addressfamily = AF_UNSPEC;
else {
- syslog(LOG_ERR, _("Invalid address family!"));
- return -1;
+ logger(LOG_ERR, _("Invalid address family!"));
+ return false;
}
free(afname);
- } else
- addressfamily = AF_INET;
+ }
get_config_bool(lookup_config(config_tree, "Hostnames"), &hostnames);
myself->cipher = EVP_get_cipherbyname(cipher);
if(!myself->cipher) {
- syslog(LOG_ERR, _("Unrecognized cipher type!"));
- return -1;
+ logger(LOG_ERR, _("Unrecognized cipher type!"));
+ return false;
}
}
} else
myself->connection->outcipher = EVP_bf_ofb();
- myself->key = (char *) xmalloc(myself->keylength);
+ myself->key = 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;
+
+ if(myself->cipher) {
+ EVP_CIPHER_CTX_init(&packet_ctx);
+ if(!EVP_DecryptInit_ex(&packet_ctx, myself->cipher, NULL, myself->key, 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;
+ }
+
+ }
/* Check if we want to use message authentication codes... */
myself->digest = EVP_get_digestbyname(digest);
if(!myself->digest) {
- syslog(LOG_ERR, _("Unrecognized digest type!"));
- return -1;
+ logger(LOG_ERR, _("Unrecognized digest type!"));
+ return false;
}
}
} else
myself->connection->outdigest = EVP_sha1();
- if(get_config_int
- (lookup_config(myself->connection->config_tree, "MACLength"),
+ if(get_config_int(lookup_config(myself->connection->config_tree, "MACLength"),
&myself->maclength)) {
if(myself->digest) {
if(myself->maclength > myself->digest->md_size) {
- syslog(LOG_ERR, _("MAC length exceeds size of digest!"));
- return -1;
+ logger(LOG_ERR, _("MAC length exceeds size of digest!"));
+ return false;
} else if(myself->maclength < 0) {
- syslog(LOG_ERR, _("Bogus MAC length!"));
- return -1;
+ logger(LOG_ERR, _("Bogus MAC length!"));
+ return false;
}
}
} else
/* Compression */
- if(get_config_int
- (lookup_config(myself->connection->config_tree, "Compression"),
+ if(get_config_int(lookup_config(myself->connection->config_tree, "Compression"),
&myself->compression)) {
- if(myself->compression < 0 || myself->compression > 9) {
- syslog(LOG_ERR, _("Bogus compression level!"));
- return -1;
+ if(myself->compression < 0 || myself->compression > 11) {
+ logger(LOG_ERR, _("Bogus compression level!"));
+ return false;
}
} else
myself->compression = 0;
myself->nexthop = myself;
myself->via = myself;
- myself->status.active = 1;
- myself->status.reachable = 1;
+ myself->status.active = true;
+ myself->status.reachable = true;
node_add(myself);
graph();
- /* Open sockets */
+ /* Open device */
+
+ if(!setup_device())
+ return false;
- memset(&hint, 0, sizeof(hint));
+ /* 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]);
+
+ /* Open sockets */
get_config_string(lookup_config(config_tree, "BindToAddress"), &address);
err = getaddrinfo(address, myport, &hint, &ai);
if(err || !ai) {
- syslog(LOG_ERR, _("System call `%s' failed: %s"), "getaddrinfo",
+ logger(LOG_ERR, _("System call `%s' failed: %s"), "getaddrinfo",
gai_strerror(err));
- return -1;
+ return false;
}
listen_sockets = 0;
if(listen_socket[listen_sockets].udp < 0)
continue;
- if(debug_lvl >= DEBUG_CONNECTIONS) {
+ ifdebug(CONNECTIONS) {
hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
- syslog(LOG_NOTICE, _("Listening on %s"), hostname);
+ logger(LOG_NOTICE, _("Listening on %s"), hostname);
free(hostname);
}
freeaddrinfo(ai);
if(listen_sockets)
- syslog(LOG_NOTICE, _("Ready"));
+ logger(LOG_NOTICE, _("Ready"));
else {
- syslog(LOG_ERR, _("Unable to create any listening socket!"));
- return -1;
+ logger(LOG_ERR, _("Unable to create any listening socket!"));
+ return false;
}
- return 0;
+ return true;
}
/*
setup all initial network connections
*/
-int setup_network_connections(void)
+bool setup_network_connections(void)
{
- char *envp[4];
- int i;
-
cp();
now = time(NULL);
} else
pingtimeout = 60;
- if(setup_device() < 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", interface ? : "");
- envp[3] = NULL;
-
- execute_script("tinc-up", envp);
-
- for(i = 0; i < 4; i++)
- free(envp[i]);
-
- if(setup_myself() < 0)
- return -1;
+ if(!setup_myself())
+ return false;
try_outgoing_connections();
- return 0;
+ return true;
}
/*
{
avl_node_t *node, *next;
connection_t *c;
- char *envp[4];
+ char *envp[5];
int i;
cp();
for(node = connection_tree->head; node; node = next) {
next = node->next;
- c = (connection_t *) node->data;
+ c = node->data;
if(c->outgoing)
free(c->outgoing->name), free(c->outgoing), c->outgoing = NULL;
- terminate_connection(c, 0);
+ terminate_connection(c, false);
}
if(myself && myself->connection)
- terminate_connection(myself->connection, 0);
+ terminate_connection(myself->connection, false);
for(i = 0; i < listen_sockets; i++) {
close(listen_socket[i].tcp);
asprintf(&envp[0], "NETNAME=%s", netname ? : "");
asprintf(&envp[1], "DEVICE=%s", device ? : "");
- asprintf(&envp[2], "INTERFACE=%s", interface ? : "");
- envp[3] = NULL;
+ asprintf(&envp[2], "INTERFACE=%s", iface ? : "");
+ asprintf(&envp[3], "NAME=%s", myself->name);
+ envp[4] = NULL;
execute_script("tinc-down", envp);
projects / tinc / blobdiff