- Non-blocking connect()s.
- Socket handling revamped to use sockaddr_t. - tinc can now tunnel over IPv6. - Handle all addresses and subnets in network byte order. Only convert them when they need to be printed. - IPv6 subnets bigger than /128 now work. - Use %s and strerror(errno) instead of %m.
This commit is contained in:
Guus Sliepen
parent
fc674eaae1
commit
c2b9c06062
33 changed files with 2487 additions and 2018 deletions
557
src/net_setup.c
Normal file
557
src/net_setup.c
Normal file
|
|
@ -0,0 +1,557 @@
|
|||
/*
|
||||
net_setup.c -- Setup.
|
||||
Copyright (C) 1998-2002 Ivo Timmermans <itimmermans@bigfoot.com>,
|
||||
2000-2002 Guus Sliepen <guus@sliepen.warande.net>
|
||||
|
||||
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
|
||||
the Free Software Foundation; either version 2 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
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: net_setup.c,v 1.1.2.1 2002/02/18 16:25:16 guus Exp $
|
||||
*/
|
||||
|
||||
#include "config.h"
|
||||
|
||||
#include <errno.h>
|
||||
#include <fcntl.h>
|
||||
#include <netdb.h>
|
||||
#include <netinet/in.h>
|
||||
#ifdef HAVE_LINUX
|
||||
#include <netinet/ip.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 <openssl/pem.h>
|
||||
#include <openssl/rsa.h>
|
||||
#include <openssl/rand.h>
|
||||
|
||||
#include <utils.h>
|
||||
#include <xalloc.h>
|
||||
#include <avl_tree.h>
|
||||
#include <list.h>
|
||||
|
||||
#include "conf.h"
|
||||
#include "connection.h"
|
||||
#include "meta.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"
|
||||
|
||||
char *myport;
|
||||
|
||||
int read_rsa_public_key(connection_t *c)
|
||||
{
|
||||
FILE *fp;
|
||||
char *fname;
|
||||
char *key;
|
||||
cp
|
||||
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");
|
||||
free(key);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Else, check for PublicKeyFile statement and read it */
|
||||
|
||||
if(get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &fname))
|
||||
{
|
||||
if(is_safe_path(fname))
|
||||
{
|
||||
if((fp = fopen(fname, "r")) == NULL)
|
||||
{
|
||||
syslog(LOG_ERR, _("Error reading RSA public key file `%s': %s"),
|
||||
fname, strerror(errno));
|
||||
free(fname);
|
||||
return -1;
|
||||
}
|
||||
free(fname);
|
||||
c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
|
||||
fclose(fp);
|
||||
if(!c->rsa_key)
|
||||
{
|
||||
syslog(LOG_ERR, _("Reading RSA public key file `%s' failed: %s"),
|
||||
fname, strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
free(fname);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
/* Else, check if a harnessed public key is in the config file */
|
||||
|
||||
asprintf(&fname, "%s/hosts/%s", confbase, c->name);
|
||||
if((fp = fopen(fname, "r")))
|
||||
{
|
||||
c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
|
||||
fclose(fp);
|
||||
}
|
||||
|
||||
free(fname);
|
||||
|
||||
if(c->rsa_key)
|
||||
return 0;
|
||||
else
|
||||
{
|
||||
syslog(LOG_ERR, _("No public key for %s specified!"), c->name);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
int read_rsa_private_key(void)
|
||||
{
|
||||
FILE *fp;
|
||||
char *fname, *key;
|
||||
cp
|
||||
if(get_config_string(lookup_config(config_tree, "PrivateKey"), &key))
|
||||
{
|
||||
myself->connection->rsa_key = RSA_new();
|
||||
BN_hex2bn(&myself->connection->rsa_key->d, key);
|
||||
BN_hex2bn(&myself->connection->rsa_key->e, "FFFF");
|
||||
free(key);
|
||||
return 0;
|
||||
}
|
||||
|
||||
if(!get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname))
|
||||
asprintf(&fname, "%s/rsa_key.priv", confbase);
|
||||
|
||||
if(is_safe_path(fname))
|
||||
{
|
||||
if((fp = fopen(fname, "r")) == NULL)
|
||||
{
|
||||
syslog(LOG_ERR, _("Error reading RSA private key file `%s': %s"),
|
||||
fname, strerror(errno));
|
||||
free(fname);
|
||||
return -1;
|
||||
}
|
||||
free(fname);
|
||||
myself->connection->rsa_key = PEM_read_RSAPrivateKey(fp, NULL, NULL, NULL);
|
||||
fclose(fp);
|
||||
if(!myself->connection->rsa_key)
|
||||
{
|
||||
syslog(LOG_ERR, _("Reading RSA private key file `%s' failed: %s"),
|
||||
fname, strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
free(fname);
|
||||
return -1;
|
||||
}
|
||||
|
||||
int check_rsa_key(RSA *rsa_key)
|
||||
{
|
||||
char *test1, *test2, *test3;
|
||||
cp
|
||||
if(rsa_key->p && rsa_key->q)
|
||||
{
|
||||
if(RSA_check_key(rsa_key) != 1)
|
||||
return -1;
|
||||
}
|
||||
else
|
||||
{
|
||||
test1 = xmalloc(RSA_size(rsa_key));
|
||||
test2 = xmalloc(RSA_size(rsa_key));
|
||||
test3 = xmalloc(RSA_size(rsa_key));
|
||||
|
||||
if(RSA_public_encrypt(RSA_size(rsa_key), test1, test2, rsa_key, RSA_NO_PADDING) != RSA_size(rsa_key))
|
||||
return -1;
|
||||
|
||||
if(RSA_private_decrypt(RSA_size(rsa_key), test2, test3, rsa_key, RSA_NO_PADDING) != RSA_size(rsa_key))
|
||||
return -1;
|
||||
|
||||
if(memcmp(test1, test3, RSA_size(rsa_key)))
|
||||
return -1;
|
||||
}
|
||||
cp
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
Configure node_t myself and set up the local sockets (listen only)
|
||||
*/
|
||||
int setup_myself(void)
|
||||
{
|
||||
config_t *cfg;
|
||||
subnet_t *subnet;
|
||||
char *name, *mode, *afname, *cipher, *digest;
|
||||
struct addrinfo hint, *ai;
|
||||
int choice;
|
||||
cp
|
||||
myself = new_node();
|
||||
myself->connection = new_connection();
|
||||
init_configuration(&myself->connection->config_tree);
|
||||
|
||||
asprintf(&myself->hostname, _("MYSELF"));
|
||||
asprintf(&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 */
|
||||
{
|
||||
syslog(LOG_ERR, _("Name for tinc daemon required!"));
|
||||
return -1;
|
||||
}
|
||||
|
||||
if(check_id(name))
|
||||
{
|
||||
syslog(LOG_ERR, _("Invalid name for myself!"));
|
||||
free(name);
|
||||
return -1;
|
||||
}
|
||||
|
||||
myself->name = name;
|
||||
myself->connection->name = xstrdup(name);
|
||||
|
||||
cp
|
||||
if(read_rsa_private_key())
|
||||
return -1;
|
||||
|
||||
if(read_connection_config(myself->connection))
|
||||
{
|
||||
syslog(LOG_ERR, _("Cannot open host configuration file for myself!"));
|
||||
return -1;
|
||||
}
|
||||
|
||||
if(read_rsa_public_key(myself->connection))
|
||||
return -1;
|
||||
cp
|
||||
|
||||
if(check_rsa_key(myself->connection->rsa_key))
|
||||
{
|
||||
syslog(LOG_ERR, _("Invalid public/private keypair!"));
|
||||
return -1;
|
||||
}
|
||||
|
||||
if(!get_config_string(lookup_config(myself->connection->config_tree, "Port"), &myport))
|
||||
asprintf(&myport, "655");
|
||||
|
||||
/* Read in all the subnets specified in the host configuration file */
|
||||
|
||||
cfg = lookup_config(myself->connection->config_tree, "Subnet");
|
||||
|
||||
while(cfg)
|
||||
{
|
||||
if(!get_config_subnet(cfg, &subnet))
|
||||
return -1;
|
||||
|
||||
subnet_add(myself, subnet);
|
||||
|
||||
cfg = lookup_config_next(myself->connection->config_tree, cfg);
|
||||
}
|
||||
|
||||
cp
|
||||
/* 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, "TCPOnly"), &choice))
|
||||
if(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, "TCPOnly"), &choice))
|
||||
if(choice)
|
||||
myself->options |= OPTION_TCPONLY;
|
||||
|
||||
if(myself->options & OPTION_TCPONLY)
|
||||
myself->options |= OPTION_INDIRECT;
|
||||
|
||||
if(get_config_string(lookup_config(config_tree, "Mode"), &mode))
|
||||
{
|
||||
if(!strcasecmp(mode, "router"))
|
||||
routing_mode = RMODE_ROUTER;
|
||||
else if (!strcasecmp(mode, "switch"))
|
||||
routing_mode = RMODE_SWITCH;
|
||||
else if (!strcasecmp(mode, "hub"))
|
||||
routing_mode = RMODE_HUB;
|
||||
else
|
||||
{
|
||||
syslog(LOG_ERR, _("Invalid routing mode!"));
|
||||
return -1;
|
||||
}
|
||||
free(mode);
|
||||
}
|
||||
else
|
||||
routing_mode = RMODE_ROUTER;
|
||||
|
||||
if(get_config_int(lookup_config(myself->connection->config_tree, "MaxTimeout"), &maxtimeout))
|
||||
{
|
||||
if(maxtimeout <= 0)
|
||||
{
|
||||
syslog(LOG_ERR, _("Bogus maximum timeout!"));
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
else
|
||||
maxtimeout = 900;
|
||||
|
||||
if(get_config_string(lookup_config(config_tree, "AddressFamily"), &afname))
|
||||
{
|
||||
if(!strcasecmp(afname, "IPv4"))
|
||||
addressfamily = AF_INET;
|
||||
else if (!strcasecmp(afname, "IPv6"))
|
||||
addressfamily = AF_INET6;
|
||||
else if (!strcasecmp(afname, "any"))
|
||||
addressfamily = AF_UNSPEC;
|
||||
else
|
||||
{
|
||||
syslog(LOG_ERR, _("Invalid address family!"));
|
||||
return -1;
|
||||
}
|
||||
free(afname);
|
||||
}
|
||||
else
|
||||
addressfamily = AF_INET;
|
||||
|
||||
get_config_bool(lookup_config(config_tree, "Hostnames"), &hostnames);
|
||||
cp
|
||||
/* Generate packet encryption key */
|
||||
|
||||
if(get_config_string(lookup_config(myself->connection->config_tree, "Cipher"), &cipher))
|
||||
{
|
||||
if(!strcasecmp(cipher, "none"))
|
||||
{
|
||||
myself->cipher = NULL;
|
||||
}
|
||||
else
|
||||
{
|
||||
if(!(myself->cipher = EVP_get_cipherbyname(cipher)))
|
||||
{
|
||||
syslog(LOG_ERR, _("Unrecognized cipher type!"));
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
myself->cipher = EVP_bf_cbc();
|
||||
|
||||
if(myself->cipher)
|
||||
myself->keylength = myself->cipher->key_len + myself->cipher->iv_len;
|
||||
else
|
||||
myself->keylength = 1;
|
||||
|
||||
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 = time(NULL) + keylifetime;
|
||||
|
||||
/* Check if we want to use message authentication codes... */
|
||||
|
||||
if(get_config_string(lookup_config(myself->connection->config_tree, "Digest"), &digest))
|
||||
{
|
||||
if(!strcasecmp(digest, "none"))
|
||||
{
|
||||
myself->digest = NULL;
|
||||
}
|
||||
else
|
||||
{
|
||||
if(!(myself->digest = EVP_get_digestbyname(digest)))
|
||||
{
|
||||
syslog(LOG_ERR, _("Unrecognized digest type!"));
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
myself->digest = 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)
|
||||
{
|
||||
syslog(LOG_ERR, _("MAC length exceeds size of digest!"));
|
||||
return -1;
|
||||
}
|
||||
else if (myself->maclength < 0)
|
||||
{
|
||||
syslog(LOG_ERR, _("Bogus MAC length!"));
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
myself->maclength = 4;
|
||||
|
||||
/* 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;
|
||||
}
|
||||
}
|
||||
else
|
||||
myself->compression = 0;
|
||||
cp
|
||||
/* Done */
|
||||
|
||||
myself->nexthop = myself;
|
||||
myself->via = myself;
|
||||
myself->status.active = 1;
|
||||
node_add(myself);
|
||||
|
||||
graph();
|
||||
|
||||
cp
|
||||
/* Open sockets */
|
||||
|
||||
hint.ai_family = (addressfamily == AF_UNSPEC)?AF_INET6:addressfamily;
|
||||
hint.ai_socktype = SOCK_STREAM;
|
||||
hint.ai_protocol = IPPROTO_TCP;
|
||||
hint.ai_flags = AI_PASSIVE;
|
||||
|
||||
if(getaddrinfo(NULL, myport, &hint, &ai) || !ai)
|
||||
{
|
||||
syslog(LOG_ERR, _("System call `%s' failed: %s"), "getaddrinfo", strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
|
||||
if((tcp_socket = setup_listen_socket((sockaddr_t *)ai->ai_addr)) < 0)
|
||||
{
|
||||
syslog(LOG_ERR, _("Unable to set up a listening TCP socket!"));
|
||||
return -1;
|
||||
}
|
||||
|
||||
if((udp_socket = setup_vpn_in_socket((sockaddr_t *)ai->ai_addr)) < 0)
|
||||
{
|
||||
syslog(LOG_ERR, _("Unable to set up a listening UDP socket!"));
|
||||
return -1;
|
||||
}
|
||||
|
||||
freeaddrinfo(ai);
|
||||
|
||||
syslog(LOG_NOTICE, _("Ready: listening on port %s"), myport);
|
||||
cp
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
setup all initial network connections
|
||||
*/
|
||||
int setup_network_connections(void)
|
||||
{
|
||||
cp
|
||||
init_connections();
|
||||
init_subnets();
|
||||
init_nodes();
|
||||
init_edges();
|
||||
init_events();
|
||||
|
||||
if(get_config_int(lookup_config(config_tree, "PingTimeout"), &pingtimeout))
|
||||
{
|
||||
if(pingtimeout < 1)
|
||||
{
|
||||
pingtimeout = 86400;
|
||||
}
|
||||
}
|
||||
else
|
||||
pingtimeout = 60;
|
||||
|
||||
if(setup_device() < 0)
|
||||
return -1;
|
||||
|
||||
/* Run tinc-up script to further initialize the tap interface */
|
||||
execute_script("tinc-up");
|
||||
|
||||
if(setup_myself() < 0)
|
||||
return -1;
|
||||
|
||||
try_outgoing_connections();
|
||||
cp
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
close all open network connections
|
||||
*/
|
||||
void close_network_connections(void)
|
||||
{
|
||||
avl_node_t *node, *next;
|
||||
connection_t *c;
|
||||
cp
|
||||
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);
|
||||
terminate_connection(c, 0);
|
||||
}
|
||||
|
||||
if(myself && myself->connection)
|
||||
terminate_connection(myself->connection, 0);
|
||||
|
||||
close(udp_socket);
|
||||
close(tcp_socket);
|
||||
|
||||
exit_events();
|
||||
exit_edges();
|
||||
exit_subnets();
|
||||
exit_nodes();
|
||||
exit_connections();
|
||||
|
||||
execute_script("tinc-down");
|
||||
|
||||
close_device();
|
||||
cp
|
||||
return;
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue