2000-03-26 00:33:07 +00:00
|
|
|
/*
|
|
|
|
net.c -- most of the network code
|
2001-01-07 17:09:07 +00:00
|
|
|
Copyright (C) 1998-2001 Ivo Timmermans <itimmermans@bigfoot.com>,
|
|
|
|
2000,2001 Guus Sliepen <guus@sliepen.warande.net>
|
2000-03-26 00:33:07 +00:00
|
|
|
|
|
|
|
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.
|
2000-05-29 22:20:04 +00:00
|
|
|
|
2001-10-27 15:19:13 +00:00
|
|
|
$Id: net.c,v 1.35.4.139 2001/10/27 15:19:13 guus Exp $
|
2000-03-26 00:33:07 +00:00
|
|
|
*/
|
|
|
|
|
|
|
|
#include "config.h"
|
|
|
|
|
|
|
|
#include <errno.h>
|
|
|
|
#include <fcntl.h>
|
|
|
|
#include <netdb.h>
|
|
|
|
#include <netinet/in.h>
|
2001-05-28 08:56:57 +00:00
|
|
|
#ifdef HAVE_LINUX
|
2001-05-28 08:21:43 +00:00
|
|
|
#include <netinet/ip.h>
|
|
|
|
#include <netinet/tcp.h>
|
|
|
|
#endif
|
2000-03-26 00:33:07 +00:00
|
|
|
#include <stdio.h>
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <string.h>
|
|
|
|
#include <sys/signal.h>
|
|
|
|
#include <sys/time.h>
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <syslog.h>
|
|
|
|
#include <unistd.h>
|
2000-10-29 00:02:20 +00:00
|
|
|
#include <sys/ioctl.h>
|
2000-11-15 13:33:27 +00:00
|
|
|
/* 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>
|
2000-11-15 01:06:13 +00:00
|
|
|
|
2001-07-04 08:41:36 +00:00
|
|
|
#include <openssl/rand.h>
|
|
|
|
#include <openssl/evp.h>
|
|
|
|
#include <openssl/pem.h>
|
2000-03-26 00:33:07 +00:00
|
|
|
|
2001-07-04 08:41:36 +00:00
|
|
|
#ifndef HAVE_RAND_PSEUDO_BYTES
|
|
|
|
#define RAND_pseudo_bytes RAND_bytes
|
2000-11-30 22:48:48 +00:00
|
|
|
#endif
|
|
|
|
|
2000-03-26 00:33:07 +00:00
|
|
|
#include <utils.h>
|
|
|
|
#include <xalloc.h>
|
2001-01-05 23:53:53 +00:00
|
|
|
#include <avl_tree.h>
|
2001-01-07 15:25:49 +00:00
|
|
|
#include <list.h>
|
2000-03-26 00:33:07 +00:00
|
|
|
|
|
|
|
#include "conf.h"
|
2000-11-20 19:12:17 +00:00
|
|
|
#include "connection.h"
|
2000-11-03 22:33:16 +00:00
|
|
|
#include "meta.h"
|
2000-03-26 00:33:07 +00:00
|
|
|
#include "net.h"
|
|
|
|
#include "netutl.h"
|
2000-11-16 17:54:29 +00:00
|
|
|
#include "process.h"
|
2000-03-26 00:33:07 +00:00
|
|
|
#include "protocol.h"
|
2000-10-28 21:52:22 +00:00
|
|
|
#include "subnet.h"
|
2001-03-01 21:32:04 +00:00
|
|
|
#include "process.h"
|
2001-03-04 13:59:32 +00:00
|
|
|
#include "route.h"
|
2001-10-27 12:13:17 +00:00
|
|
|
#include "device.h"
|
2000-03-26 00:33:07 +00:00
|
|
|
|
2000-05-29 21:01:26 +00:00
|
|
|
#include "system.h"
|
|
|
|
|
2001-10-27 13:13:35 +00:00
|
|
|
int maxtimeout = 900;
|
2001-06-08 18:02:10 +00:00
|
|
|
int seconds_till_retry = 5;
|
2001-10-27 13:13:35 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
int tcp_socket = -1;
|
|
|
|
int udp_socket = -1;
|
2000-05-27 19:44:04 +00:00
|
|
|
|
2000-10-29 10:39:08 +00:00
|
|
|
int keylifetime = 0;
|
|
|
|
int keyexpires = 0;
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
/* VPN packet I/O */
|
|
|
|
|
|
|
|
void receive_udppacket(node_t *n, vpn_packet_t *inpkt)
|
|
|
|
{
|
|
|
|
vpn_packet_t outpkt;
|
|
|
|
int outlen, outpad;
|
|
|
|
EVP_CIPHER_CTX ctx;
|
|
|
|
cp
|
|
|
|
/* Decrypt the packet */
|
|
|
|
|
|
|
|
EVP_DecryptInit(&ctx, myself->cipher, myself->key, myself->key + myself->cipher->key_len);
|
|
|
|
EVP_DecryptUpdate(&ctx, outpkt.salt, &outlen, inpkt->salt, inpkt->len);
|
|
|
|
EVP_DecryptFinal(&ctx, outpkt.salt + outlen, &outpad);
|
|
|
|
outlen += outpad;
|
|
|
|
outpkt.len = outlen - sizeof(outpkt.salt);
|
|
|
|
|
|
|
|
receive_packet(n, &outpkt);
|
|
|
|
cp
|
|
|
|
}
|
|
|
|
|
|
|
|
void receive_tcppacket(connection_t *c, char *buffer, int len)
|
|
|
|
{
|
|
|
|
vpn_packet_t outpkt;
|
|
|
|
cp
|
|
|
|
outpkt.len = len;
|
|
|
|
memcpy(outpkt.data, buffer, len);
|
|
|
|
|
|
|
|
receive_packet(c->node, &outpkt);
|
|
|
|
cp
|
|
|
|
}
|
|
|
|
|
|
|
|
void receive_packet(node_t *n, vpn_packet_t *packet)
|
|
|
|
{
|
|
|
|
cp
|
|
|
|
if(debug_lvl >= DEBUG_TRAFFIC)
|
|
|
|
syslog(LOG_DEBUG, _("Received packet of %d bytes from %s (%s)"), packet->len, n->name, n->hostname);
|
|
|
|
|
|
|
|
route_incoming(n, packet);
|
|
|
|
cp
|
|
|
|
}
|
|
|
|
|
|
|
|
void send_udppacket(node_t *n, vpn_packet_t *inpkt)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2000-10-11 10:35:17 +00:00
|
|
|
vpn_packet_t outpkt;
|
|
|
|
int outlen, outpad;
|
2000-10-29 10:39:08 +00:00
|
|
|
EVP_CIPHER_CTX ctx;
|
2000-11-25 13:33:33 +00:00
|
|
|
struct sockaddr_in to;
|
|
|
|
socklen_t tolen = sizeof(to);
|
2001-03-04 13:59:32 +00:00
|
|
|
vpn_packet_t *copy;
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2001-10-27 12:13:17 +00:00
|
|
|
if(!n->status.validkey)
|
2001-03-04 13:59:32 +00:00
|
|
|
{
|
|
|
|
if(debug_lvl >= DEBUG_TRAFFIC)
|
|
|
|
syslog(LOG_INFO, _("No valid key known yet for %s (%s), queueing packet"),
|
2001-10-27 12:13:17 +00:00
|
|
|
n->name, n->hostname);
|
2001-03-04 13:59:32 +00:00
|
|
|
|
|
|
|
/* Since packet is on the stack of handle_tap_input(),
|
|
|
|
we have to make a copy of it first. */
|
|
|
|
|
|
|
|
copy = xmalloc(sizeof(vpn_packet_t));
|
|
|
|
memcpy(copy, inpkt, sizeof(vpn_packet_t));
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
list_insert_tail(n->queue, copy);
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(!n->status.waitingforkey)
|
|
|
|
send_req_key(n->nexthop->connection, myself, n);
|
2001-03-04 13:59:32 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2001-02-25 16:34:19 +00:00
|
|
|
/* Encrypt the packet. */
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2001-07-04 08:41:36 +00:00
|
|
|
RAND_pseudo_bytes(inpkt->salt, sizeof(inpkt->salt));
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
EVP_EncryptInit(&ctx, n->cipher, n->key, n->key + n->cipher->key_len);
|
2001-05-07 19:08:46 +00:00
|
|
|
EVP_EncryptUpdate(&ctx, outpkt.salt, &outlen, inpkt->salt, inpkt->len + sizeof(inpkt->salt));
|
|
|
|
EVP_EncryptFinal(&ctx, outpkt.salt + outlen, &outpad);
|
|
|
|
outlen += outpad;
|
2000-10-28 21:05:20 +00:00
|
|
|
|
2000-11-25 13:33:33 +00:00
|
|
|
to.sin_family = AF_INET;
|
2001-10-27 12:13:17 +00:00
|
|
|
to.sin_addr.s_addr = htonl(n->address);
|
|
|
|
to.sin_port = htons(n->port);
|
2000-11-25 13:33:33 +00:00
|
|
|
|
2001-10-27 13:13:35 +00:00
|
|
|
if((sendto(udp_socket, (char *) outpkt.salt, outlen, 0, (const struct sockaddr *)&to, tolen)) < 0)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2000-09-14 21:51:21 +00:00
|
|
|
syslog(LOG_ERR, _("Error sending packet to %s (%s): %m"),
|
2001-10-27 12:13:17 +00:00
|
|
|
n->name, n->hostname);
|
2001-03-04 13:59:32 +00:00
|
|
|
return;
|
2000-03-26 00:33:07 +00:00
|
|
|
}
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2000-03-26 00:33:07 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
send a packet to the given vpn ip.
|
|
|
|
*/
|
2001-10-27 12:13:17 +00:00
|
|
|
void send_packet(node_t *n, vpn_packet_t *packet)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2001-03-04 13:59:32 +00:00
|
|
|
if(debug_lvl >= DEBUG_TRAFFIC)
|
|
|
|
syslog(LOG_ERR, _("Sending packet of %d bytes to %s (%s)"),
|
2001-10-27 12:13:17 +00:00
|
|
|
packet->len, n->name, n->hostname);
|
2000-10-28 16:41:40 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(n == myself)
|
2000-11-04 17:09:10 +00:00
|
|
|
{
|
|
|
|
if(debug_lvl >= DEBUG_TRAFFIC)
|
|
|
|
{
|
2001-03-04 13:59:32 +00:00
|
|
|
syslog(LOG_NOTICE, _("Packet is looping back to us!"));
|
2000-11-04 17:09:10 +00:00
|
|
|
}
|
|
|
|
|
2001-03-04 13:59:32 +00:00
|
|
|
return;
|
2000-11-04 17:09:10 +00:00
|
|
|
}
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(!n->status.active)
|
2001-01-07 15:25:49 +00:00
|
|
|
{
|
|
|
|
if(debug_lvl >= DEBUG_TRAFFIC)
|
|
|
|
syslog(LOG_INFO, _("%s (%s) is not active, dropping packet"),
|
2001-10-27 12:13:17 +00:00
|
|
|
n->name, n->hostname);
|
2001-01-07 15:25:49 +00:00
|
|
|
|
2001-03-04 13:59:32 +00:00
|
|
|
return;
|
2001-01-07 15:25:49 +00:00
|
|
|
}
|
2001-10-27 12:13:17 +00:00
|
|
|
/* FIXME
|
|
|
|
if(n->via == myself)
|
|
|
|
via = n->nexthop;
|
2001-01-07 20:19:35 +00:00
|
|
|
else
|
2001-10-27 12:13:17 +00:00
|
|
|
via = n->via;
|
2001-09-24 14:12:00 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(via != n && debug_lvl >= DEBUG_TRAFFIC)
|
2001-10-08 11:47:55 +00:00
|
|
|
syslog(LOG_ERR, _("Sending packet to %s via %s (%s)"),
|
2001-10-27 12:13:17 +00:00
|
|
|
n->name, via->name, via->hostname);
|
2001-09-24 14:12:00 +00:00
|
|
|
|
2001-10-08 11:47:55 +00:00
|
|
|
if((myself->options | via->options) & OPTION_TCPONLY)
|
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
if(send_tcppacket(via->connection, packet))
|
|
|
|
terminate_connection(via->connection, 1);
|
2001-09-24 14:12:00 +00:00
|
|
|
}
|
2001-10-08 11:47:55 +00:00
|
|
|
else
|
|
|
|
send_udppacket(via, packet);
|
2001-10-27 12:13:17 +00:00
|
|
|
*/
|
2000-03-26 00:33:07 +00:00
|
|
|
}
|
|
|
|
|
2001-07-20 13:54:19 +00:00
|
|
|
/* Broadcast a packet to all active direct connections */
|
2001-06-05 16:09:55 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
void broadcast_packet(node_t *from, vpn_packet_t *packet)
|
2001-06-05 16:09:55 +00:00
|
|
|
{
|
|
|
|
avl_node_t *node;
|
2001-10-27 12:13:17 +00:00
|
|
|
connection_t *c;
|
2001-06-05 16:09:55 +00:00
|
|
|
cp
|
|
|
|
if(debug_lvl >= DEBUG_TRAFFIC)
|
|
|
|
syslog(LOG_INFO, _("Broadcasting packet of %d bytes from %s (%s)"),
|
|
|
|
packet->len, from->name, from->hostname);
|
|
|
|
|
|
|
|
for(node = connection_tree->head; node; node = node->next)
|
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
c = (connection_t *)node->data;
|
|
|
|
if(c->status.active && c != from->nexthop->connection)
|
|
|
|
send_packet(c->node, packet);
|
2001-06-05 16:09:55 +00:00
|
|
|
}
|
|
|
|
cp
|
|
|
|
}
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
void flush_queue(node_t *n)
|
2001-01-07 15:25:49 +00:00
|
|
|
{
|
|
|
|
list_node_t *node, *next;
|
2001-02-25 16:04:00 +00:00
|
|
|
cp
|
2001-01-07 15:25:49 +00:00
|
|
|
if(debug_lvl >= DEBUG_TRAFFIC)
|
2001-10-27 12:13:17 +00:00
|
|
|
syslog(LOG_INFO, _("Flushing queue for %s (%s)"), n->name, n->hostname);
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
for(node = n->queue->head; node; node = next)
|
2001-01-07 15:25:49 +00:00
|
|
|
{
|
|
|
|
next = node->next;
|
2001-10-27 12:13:17 +00:00
|
|
|
send_udppacket(n, (vpn_packet_t *)node->data);
|
|
|
|
list_delete_node(n->queue, node);
|
2001-01-07 15:25:49 +00:00
|
|
|
}
|
2001-02-25 16:04:00 +00:00
|
|
|
cp
|
2001-01-07 15:25:49 +00:00
|
|
|
}
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
/* Setup sockets */
|
2000-10-16 19:04:47 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
int setup_listen_socket(int port)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
|
|
|
int nfd, flags;
|
|
|
|
struct sockaddr_in a;
|
2001-02-27 16:17:04 +00:00
|
|
|
int option;
|
2001-10-27 12:13:17 +00:00
|
|
|
char *interface;
|
|
|
|
char *address;
|
|
|
|
ip_mask_t *ipmask;
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2000-03-26 00:33:07 +00:00
|
|
|
if((nfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
|
|
|
|
{
|
2000-05-29 21:01:26 +00:00
|
|
|
syslog(LOG_ERR, _("Creating metasocket failed: %m"));
|
2000-03-26 00:33:07 +00:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
flags = fcntl(nfd, F_GETFL);
|
|
|
|
if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0)
|
|
|
|
{
|
2000-11-08 17:56:34 +00:00
|
|
|
close(nfd);
|
2000-11-02 22:05:36 +00:00
|
|
|
syslog(LOG_ERR, _("System call `%s' failed: %m"),
|
|
|
|
"fcntl");
|
2000-03-26 00:33:07 +00:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2001-02-27 16:17:04 +00:00
|
|
|
/* Optimize TCP settings */
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2001-02-27 16:17:04 +00:00
|
|
|
option = 1;
|
|
|
|
setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option));
|
|
|
|
setsockopt(nfd, SOL_SOCKET, SO_KEEPALIVE, &option, sizeof(option));
|
2001-05-28 08:56:57 +00:00
|
|
|
#ifdef HAVE_LINUX
|
2001-02-27 16:17:04 +00:00
|
|
|
setsockopt(nfd, SOL_TCP, TCP_NODELAY, &option, sizeof(option));
|
|
|
|
|
|
|
|
option = IPTOS_LOWDELAY;
|
|
|
|
setsockopt(nfd, SOL_IP, IP_TOS, &option, sizeof(option));
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(get_config_string(lookup_config(config_tree, "BindToInterface"), &interface))
|
|
|
|
if(setsockopt(nfd, SOL_SOCKET, SO_BINDTODEVICE, interface, strlen(interface)))
|
|
|
|
{
|
|
|
|
close(nfd);
|
|
|
|
syslog(LOG_ERR, _("Can't bind to interface %s: %m"), interface);
|
|
|
|
return -1;
|
|
|
|
}
|
2001-05-28 08:21:43 +00:00
|
|
|
#endif
|
2000-08-09 14:02:16 +00:00
|
|
|
|
2000-03-26 00:33:07 +00:00
|
|
|
memset(&a, 0, sizeof(a));
|
|
|
|
a.sin_family = AF_INET;
|
2001-10-27 12:13:17 +00:00
|
|
|
a.sin_addr.s_addr = htonl(INADDR_ANY);
|
2000-03-26 00:33:07 +00:00
|
|
|
a.sin_port = htons(port);
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(get_config_string(lookup_config(config_tree, "BindToAddress"), &address))
|
|
|
|
{
|
|
|
|
ipmask = strtoip(address);
|
|
|
|
if(ipmask)
|
|
|
|
{
|
|
|
|
a.sin_addr.s_addr = htonl(ipmask->address);
|
|
|
|
free(ipmask);
|
|
|
|
}
|
|
|
|
}
|
2000-03-26 00:33:07 +00:00
|
|
|
|
|
|
|
if(bind(nfd, (struct sockaddr *)&a, sizeof(struct sockaddr)))
|
|
|
|
{
|
2000-11-08 17:56:34 +00:00
|
|
|
close(nfd);
|
2000-05-29 21:01:26 +00:00
|
|
|
syslog(LOG_ERR, _("Can't bind to port %hd/tcp: %m"), port);
|
2000-03-26 00:33:07 +00:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if(listen(nfd, 3))
|
|
|
|
{
|
2000-11-08 17:56:34 +00:00
|
|
|
close(nfd);
|
2000-11-02 22:05:36 +00:00
|
|
|
syslog(LOG_ERR, _("System call `%s' failed: %m"),
|
|
|
|
"listen");
|
2000-03-26 00:33:07 +00:00
|
|
|
return -1;
|
|
|
|
}
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2000-03-26 00:33:07 +00:00
|
|
|
return nfd;
|
|
|
|
}
|
|
|
|
|
|
|
|
int setup_vpn_in_socket(int port)
|
|
|
|
{
|
|
|
|
int nfd, flags;
|
|
|
|
struct sockaddr_in a;
|
|
|
|
const int one = 1;
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2000-03-26 00:33:07 +00:00
|
|
|
if((nfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
|
|
|
|
{
|
2000-11-08 17:56:34 +00:00
|
|
|
close(nfd);
|
2000-05-29 21:01:26 +00:00
|
|
|
syslog(LOG_ERR, _("Creating socket failed: %m"));
|
2000-03-26 00:33:07 +00:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2001-02-27 16:17:04 +00:00
|
|
|
setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
|
2000-03-26 00:33:07 +00:00
|
|
|
|
|
|
|
flags = fcntl(nfd, F_GETFL);
|
|
|
|
if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0)
|
|
|
|
{
|
2000-11-08 17:56:34 +00:00
|
|
|
close(nfd);
|
2000-11-02 22:05:36 +00:00
|
|
|
syslog(LOG_ERR, _("System call `%s' failed: %m"),
|
|
|
|
"fcntl");
|
2000-03-26 00:33:07 +00:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
memset(&a, 0, sizeof(a));
|
|
|
|
a.sin_family = AF_INET;
|
|
|
|
a.sin_port = htons(port);
|
|
|
|
a.sin_addr.s_addr = htonl(INADDR_ANY);
|
|
|
|
|
|
|
|
if(bind(nfd, (struct sockaddr *)&a, sizeof(struct sockaddr)))
|
|
|
|
{
|
2000-11-08 17:56:34 +00:00
|
|
|
close(nfd);
|
2000-05-29 21:01:26 +00:00
|
|
|
syslog(LOG_ERR, _("Can't bind to port %hd/udp: %m"), port);
|
2000-03-26 00:33:07 +00:00
|
|
|
return -1;
|
|
|
|
}
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2000-03-26 00:33:07 +00:00
|
|
|
return nfd;
|
|
|
|
}
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
int setup_outgoing_socket(connection_t *c)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
|
|
|
int flags;
|
|
|
|
struct sockaddr_in a;
|
2001-02-27 16:17:04 +00:00
|
|
|
int option;
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2000-10-21 11:52:08 +00:00
|
|
|
if(debug_lvl >= DEBUG_CONNECTIONS)
|
2001-10-27 12:13:17 +00:00
|
|
|
syslog(LOG_INFO, _("Trying to connect to %s (%s)"), c->name, c->hostname);
|
2000-06-27 20:10:48 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
c->socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
|
2000-03-26 00:33:07 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(c->socket == -1)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2000-06-30 12:41:06 +00:00
|
|
|
syslog(LOG_ERR, _("Creating socket for %s port %d failed: %m"),
|
2001-10-27 12:13:17 +00:00
|
|
|
c->hostname, c->port);
|
2000-03-26 00:33:07 +00:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
/* Bind first to get a fix on our source port???
|
2001-01-05 23:53:53 +00:00
|
|
|
|
|
|
|
a.sin_family = AF_INET;
|
|
|
|
a.sin_port = htons(0);
|
|
|
|
a.sin_addr.s_addr = htonl(INADDR_ANY);
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(bind(c->socket, (struct sockaddr *)&a, sizeof(struct sockaddr)))
|
2001-01-05 23:53:53 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
close(c->socket);
|
2001-01-05 23:53:53 +00:00
|
|
|
syslog(LOG_ERR, _("System call `%s' failed: %m"), "bind");
|
|
|
|
return -1;
|
|
|
|
}
|
2001-02-27 16:17:04 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
*/
|
|
|
|
|
|
|
|
/* Optimize TCP settings?
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2001-02-27 16:17:04 +00:00
|
|
|
option = 1;
|
2001-10-27 12:13:17 +00:00
|
|
|
setsockopt(c->socket, SOL_SOCKET, SO_KEEPALIVE, &option, sizeof(option));
|
2001-05-28 08:56:57 +00:00
|
|
|
#ifdef HAVE_LINUX
|
2001-10-27 12:13:17 +00:00
|
|
|
setsockopt(c->socket, SOL_TCP, TCP_NODELAY, &option, sizeof(option));
|
2001-02-27 16:17:04 +00:00
|
|
|
|
|
|
|
option = IPTOS_LOWDELAY;
|
2001-10-27 12:13:17 +00:00
|
|
|
setsockopt(c->socket, SOL_IP, IP_TOS, &option, sizeof(option));
|
2001-05-28 08:21:43 +00:00
|
|
|
#endif
|
2001-10-27 12:13:17 +00:00
|
|
|
|
|
|
|
*/
|
|
|
|
|
2001-02-27 16:17:04 +00:00
|
|
|
/* Connect */
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2000-03-26 00:33:07 +00:00
|
|
|
a.sin_family = AF_INET;
|
2001-10-27 12:13:17 +00:00
|
|
|
a.sin_port = htons(c->port);
|
|
|
|
a.sin_addr.s_addr = htonl(c->address);
|
2000-03-26 00:33:07 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(connect(c->socket, (struct sockaddr *)&a, sizeof(a)) == -1)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
close(c->socket);
|
|
|
|
syslog(LOG_ERR, _("%s port %hd: %m"), c->hostname, c->port);
|
2000-03-26 00:33:07 +00:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
flags = fcntl(c->socket, F_GETFL);
|
|
|
|
|
|
|
|
if(fcntl(c->socket, F_SETFL, flags | O_NONBLOCK) < 0)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
close(c->socket);
|
2000-06-30 12:41:06 +00:00
|
|
|
syslog(LOG_ERR, _("fcntl for %s port %d: %m"),
|
2001-10-27 12:13:17 +00:00
|
|
|
c->hostname, c->port);
|
2000-03-26 00:33:07 +00:00
|
|
|
return -1;
|
|
|
|
}
|
2000-08-09 09:34:21 +00:00
|
|
|
|
2000-10-21 11:52:08 +00:00
|
|
|
if(debug_lvl >= DEBUG_CONNECTIONS)
|
2000-06-30 21:03:51 +00:00
|
|
|
syslog(LOG_INFO, _("Connected to %s port %hd"),
|
2001-10-27 12:13:17 +00:00
|
|
|
c->hostname, c->port);
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2000-03-26 00:33:07 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2000-10-16 16:33:30 +00:00
|
|
|
int setup_outgoing_connection(char *name)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
connection_t *c;
|
2000-07-02 13:36:18 +00:00
|
|
|
struct hostent *h;
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2001-10-27 12:13:17 +00:00
|
|
|
c = new_connection();
|
|
|
|
c->name = xstrdup(name);
|
2001-07-19 12:29:40 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
read_connection_config(c);
|
|
|
|
|
|
|
|
if(!get_config_string(lookup_config(c->config_tree, "Address"), &c->hostname))
|
2000-10-16 16:33:30 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
syslog(LOG_ERR, _("No address specified for %s"), c->name);
|
|
|
|
free_connection(c);
|
2000-10-16 16:33:30 +00:00
|
|
|
return -1;
|
|
|
|
}
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(!get_config_port(lookup_config(c->config_tree, "Port"), &c->port))
|
2000-10-16 16:33:30 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
syslog(LOG_ERR, _("No port specified for %s"), c->name);
|
|
|
|
free_connection(c);
|
2000-10-16 16:33:30 +00:00
|
|
|
return -1;
|
|
|
|
}
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(!(h = gethostbyname(c->hostname)))
|
2000-10-16 16:33:30 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
syslog(LOG_ERR, _("Error looking up `%s': %m"), c->hostname);
|
|
|
|
free_connection(c);
|
2000-10-16 16:33:30 +00:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
c->address = ntohl(*((ipv4_t*)(h->h_addr_list[0])));
|
|
|
|
c->hostname = hostlookup(htonl(c->address));
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(setup_outgoing_socket(c) < 0)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
syslog(LOG_ERR, _("Could not set up a meta connection to %s (%s)"),
|
|
|
|
c->name, c->hostname);
|
|
|
|
free_connection(c);
|
2000-03-26 00:33:07 +00:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
c->status.outgoing = 1;
|
|
|
|
c->last_ping_time = time(NULL);
|
2000-10-16 16:33:30 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
connection_add(c);
|
2000-10-16 16:33:30 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
send_id(c);
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2000-03-26 00:33:07 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
int read_rsa_public_key(connection_t *c)
|
2000-11-30 23:18:21 +00:00
|
|
|
{
|
|
|
|
FILE *fp;
|
2001-01-13 16:36:23 +00:00
|
|
|
char *fname;
|
2001-10-27 12:13:17 +00:00
|
|
|
char *key;
|
2000-12-22 21:34:24 +00:00
|
|
|
void *result;
|
|
|
|
cp
|
2001-10-27 12:13:17 +00:00
|
|
|
if(!c->rsa_key)
|
|
|
|
c->rsa_key = RSA_new();
|
2000-11-30 23:18:21 +00:00
|
|
|
|
2001-01-13 16:36:23 +00:00
|
|
|
/* First, check for simple PublicKey statement */
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(get_config_string(lookup_config(c->config_tree, "PublicKey"), &key))
|
2000-11-30 23:18:21 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
BN_hex2bn(&c->rsa_key->n, key);
|
|
|
|
BN_hex2bn(&c->rsa_key->e, "FFFF");
|
2001-01-13 16:36:23 +00:00
|
|
|
return 0;
|
2000-11-30 23:18:21 +00:00
|
|
|
}
|
2001-01-13 16:36:23 +00:00
|
|
|
|
|
|
|
/* Else, check for PublicKeyFile statement and read it */
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &fname))
|
2000-11-30 23:18:21 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
if(is_safe_path(fname))
|
2000-12-22 21:34:24 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
if((fp = fopen(fname, "r")) == NULL)
|
2000-12-22 21:34:24 +00:00
|
|
|
{
|
|
|
|
syslog(LOG_ERR, _("Error reading RSA public key file `%s': %m"),
|
2001-10-27 12:13:17 +00:00
|
|
|
fname);
|
2000-12-22 21:34:24 +00:00
|
|
|
return -1;
|
|
|
|
}
|
2001-10-27 12:13:17 +00:00
|
|
|
result = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
|
2000-12-22 21:34:24 +00:00
|
|
|
fclose(fp);
|
|
|
|
if(!result)
|
|
|
|
{
|
|
|
|
syslog(LOG_ERR, _("Reading RSA public key file `%s' failed: %m"),
|
2001-10-27 12:13:17 +00:00
|
|
|
fname);
|
2000-12-22 21:34:24 +00:00
|
|
|
return -1;
|
|
|
|
}
|
2001-01-13 16:36:23 +00:00
|
|
|
return 0;
|
2000-12-22 21:34:24 +00:00
|
|
|
}
|
|
|
|
else
|
|
|
|
return -1;
|
2001-03-04 13:59:32 +00:00
|
|
|
}
|
2001-01-13 16:36:23 +00:00
|
|
|
|
|
|
|
/* Else, check if a harnessed public key is in the config file */
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
result = NULL;
|
|
|
|
|
|
|
|
asprintf(&fname, "%s/hosts/%s", confbase, c->name);
|
2001-01-13 16:36:23 +00:00
|
|
|
if((fp = fopen(fname, "r")))
|
2000-12-22 21:34:24 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
result = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
|
2001-01-13 16:36:23 +00:00
|
|
|
fclose(fp);
|
|
|
|
free(fname);
|
2000-11-30 23:18:21 +00:00
|
|
|
}
|
2001-01-13 16:36:23 +00:00
|
|
|
|
|
|
|
free(fname);
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(result)
|
|
|
|
return 0;
|
|
|
|
else
|
|
|
|
{
|
|
|
|
syslog(LOG_ERR, _("No public key for %s specified!"), c->name);
|
|
|
|
return -1;
|
|
|
|
}
|
2000-11-30 23:18:21 +00:00
|
|
|
}
|
|
|
|
|
2000-12-22 21:34:24 +00:00
|
|
|
int read_rsa_private_key(void)
|
2000-11-30 20:08:41 +00:00
|
|
|
{
|
|
|
|
FILE *fp;
|
2000-12-22 21:34:24 +00:00
|
|
|
void *result;
|
2001-10-27 12:13:17 +00:00
|
|
|
char *fname, *key;
|
2000-12-22 21:34:24 +00:00
|
|
|
cp
|
2001-10-27 12:13:17 +00:00
|
|
|
if(!myself->connection->rsa_key)
|
|
|
|
myself->connection->rsa_key = RSA_new();
|
2000-11-30 20:08:41 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(get_config_string(lookup_config(config_tree, "PrivateKey"), &key))
|
2000-11-30 20:08:41 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
BN_hex2bn(&myself->connection->rsa_key->d, key);
|
|
|
|
BN_hex2bn(&myself->connection->rsa_key->e, "FFFF");
|
2000-11-30 20:08:41 +00:00
|
|
|
}
|
2001-10-27 12:13:17 +00:00
|
|
|
else if(get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname))
|
2000-11-30 22:48:48 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
if((fp = fopen(fname, "r")) == NULL)
|
2000-12-22 21:34:24 +00:00
|
|
|
{
|
|
|
|
syslog(LOG_ERR, _("Error reading RSA private key file `%s': %m"),
|
2001-10-27 12:13:17 +00:00
|
|
|
fname);
|
2000-12-22 21:34:24 +00:00
|
|
|
return -1;
|
|
|
|
}
|
2001-10-27 12:13:17 +00:00
|
|
|
result = PEM_read_RSAPrivateKey(fp, &myself->connection->rsa_key, NULL, NULL);
|
2000-12-22 21:34:24 +00:00
|
|
|
fclose(fp);
|
|
|
|
if(!result)
|
|
|
|
{
|
|
|
|
syslog(LOG_ERR, _("Reading RSA private key file `%s' failed: %m"),
|
2001-10-27 12:13:17 +00:00
|
|
|
fname);
|
2000-12-22 21:34:24 +00:00
|
|
|
return -1;
|
|
|
|
}
|
2001-03-04 13:59:32 +00:00
|
|
|
}
|
2000-12-22 21:34:24 +00:00
|
|
|
else
|
2000-11-30 20:08:41 +00:00
|
|
|
{
|
2000-12-22 21:34:24 +00:00
|
|
|
syslog(LOG_ERR, _("No private key for tinc daemon specified!"));
|
2000-11-30 20:08:41 +00:00
|
|
|
return -1;
|
|
|
|
}
|
2000-12-22 21:34:24 +00:00
|
|
|
cp
|
|
|
|
return 0;
|
2000-11-30 20:08:41 +00:00
|
|
|
}
|
|
|
|
|
2000-03-26 00:33:07 +00:00
|
|
|
/*
|
2001-10-27 12:13:17 +00:00
|
|
|
Configure node_t myself and set up the local sockets (listen only)
|
2000-03-26 00:33:07 +00:00
|
|
|
*/
|
|
|
|
int setup_myself(void)
|
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
config_t *cfg;
|
|
|
|
subnet_t *subnet;
|
|
|
|
char *name, *mode;
|
|
|
|
int choice;
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2001-10-27 12:13:17 +00:00
|
|
|
myself = new_node();
|
|
|
|
myself->connection = new_connection();
|
2000-03-26 00:33:07 +00:00
|
|
|
|
2001-06-05 16:09:55 +00:00
|
|
|
asprintf(&myself->hostname, _("MYSELF"));
|
2001-10-27 12:13:17 +00:00
|
|
|
asprintf(&myself->connection->hostname, _("MYSELF"));
|
2000-10-11 10:35:17 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
myself->connection->options = 0;
|
|
|
|
myself->connection->protocol_version = PROT_CURRENT;
|
|
|
|
|
|
|
|
if(!get_config_string(lookup_config(config_tree, "Name"), &name)) /* Not acceptable */
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2000-10-11 10:35:17 +00:00
|
|
|
syslog(LOG_ERR, _("Name for tinc daemon required!"));
|
2000-03-26 00:33:07 +00:00
|
|
|
return -1;
|
|
|
|
}
|
2000-10-14 17:04:16 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(check_id(name))
|
2000-10-14 17:04:16 +00:00
|
|
|
{
|
|
|
|
syslog(LOG_ERR, _("Invalid name for myself!"));
|
2001-10-27 12:13:17 +00:00
|
|
|
free(name);
|
2000-10-14 17:04:16 +00:00
|
|
|
return -1;
|
|
|
|
}
|
2001-10-27 12:13:17 +00:00
|
|
|
|
|
|
|
myself->name = name;
|
|
|
|
myself->connection->name = xstrdup(name);
|
|
|
|
|
2000-10-20 15:34:38 +00:00
|
|
|
cp
|
2000-12-22 21:34:24 +00:00
|
|
|
if(read_rsa_private_key())
|
2000-11-30 20:08:41 +00:00
|
|
|
return -1;
|
2000-10-14 17:04:16 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(read_connection_config(myself->connection))
|
2000-10-14 17:04:16 +00:00
|
|
|
{
|
|
|
|
syslog(LOG_ERR, _("Cannot open host configuration file for myself!"));
|
|
|
|
return -1;
|
|
|
|
}
|
2000-12-22 21:34:24 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(read_rsa_public_key(myself->connection))
|
2000-12-22 21:34:24 +00:00
|
|
|
return -1;
|
2001-03-04 13:59:32 +00:00
|
|
|
cp
|
2000-11-30 23:18:21 +00:00
|
|
|
|
2000-10-20 15:34:38 +00:00
|
|
|
/*
|
2001-10-27 12:13:17 +00:00
|
|
|
if(RSA_check_key(rsa_key) != 1)
|
2000-10-20 15:34:38 +00:00
|
|
|
{
|
|
|
|
syslog(LOG_ERR, _("Invalid public/private keypair!"));
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
*/
|
2001-10-27 15:19:13 +00:00
|
|
|
if(!get_config_port(lookup_config(myself->connection->config_tree, "Port"), &myself->port))
|
2000-03-26 00:33:07 +00:00
|
|
|
myself->port = 655;
|
|
|
|
|
2001-10-27 15:19:13 +00:00
|
|
|
myself->connection->port = myself->port;
|
|
|
|
|
2000-10-24 15:46:18 +00:00
|
|
|
/* Read in all the subnets specified in the host configuration file */
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
cfg = lookup_config(myself->connection->config_tree, "Subnet");
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
while(cfg)
|
|
|
|
{
|
|
|
|
if(!get_config_subnet(cfg, &subnet))
|
|
|
|
return -1;
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
subnet_add(myself, subnet);
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
cfg = lookup_config_next(myself->connection->config_tree, cfg);
|
2000-10-24 15:46:18 +00:00
|
|
|
}
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2001-06-05 19:39:54 +00:00
|
|
|
cp
|
|
|
|
/* Check some options */
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(get_config_bool(lookup_config(config_tree, "IndirectData"), &choice))
|
|
|
|
if(choice)
|
2001-06-05 19:39:54 +00:00
|
|
|
myself->options |= OPTION_INDIRECT;
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(get_config_bool(lookup_config(config_tree, "TCPOnly"), &choice))
|
|
|
|
if(choice)
|
2001-06-05 19:39:54 +00:00
|
|
|
myself->options |= OPTION_TCPONLY;
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(get_config_bool(lookup_config(myself->connection->config_tree, "IndirectData"), &choice))
|
|
|
|
if(choice)
|
2001-06-05 19:39:54 +00:00
|
|
|
myself->options |= OPTION_INDIRECT;
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(get_config_bool(lookup_config(myself->connection->config_tree, "TCPOnly"), &choice))
|
|
|
|
if(choice)
|
2001-06-05 19:39:54 +00:00
|
|
|
myself->options |= OPTION_TCPONLY;
|
|
|
|
|
|
|
|
if(myself->options & OPTION_TCPONLY)
|
|
|
|
myself->options |= OPTION_INDIRECT;
|
|
|
|
|
2001-10-27 15:19:13 +00:00
|
|
|
if(get_config_string(lookup_config(config_tree, "Mode"), &mode))
|
2001-06-05 19:39:54 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
if(!strcasecmp(mode, "router"))
|
2001-06-05 19:39:54 +00:00
|
|
|
routing_mode = RMODE_ROUTER;
|
2001-10-27 12:13:17 +00:00
|
|
|
else if (!strcasecmp(mode, "switch"))
|
2001-06-05 19:39:54 +00:00
|
|
|
routing_mode = RMODE_SWITCH;
|
2001-10-27 12:13:17 +00:00
|
|
|
else if (!strcasecmp(mode, "hub"))
|
2001-06-05 19:39:54 +00:00
|
|
|
routing_mode = RMODE_HUB;
|
|
|
|
else
|
|
|
|
{
|
|
|
|
syslog(LOG_ERR, _("Invalid routing mode!"));
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else
|
|
|
|
routing_mode = RMODE_ROUTER;
|
|
|
|
|
|
|
|
cp
|
|
|
|
/* Open sockets */
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if((tcp_socket = setup_listen_socket(myself->port)) < 0)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2000-11-25 13:33:33 +00:00
|
|
|
syslog(LOG_ERR, _("Unable to set up a listening TCP socket!"));
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if((udp_socket = setup_vpn_in_socket(myself->port)) < 0)
|
2000-11-25 13:33:33 +00:00
|
|
|
{
|
|
|
|
syslog(LOG_ERR, _("Unable to set up a listening UDP socket!"));
|
2000-03-26 00:33:07 +00:00
|
|
|
return -1;
|
|
|
|
}
|
2001-01-05 23:53:53 +00:00
|
|
|
cp
|
2000-10-29 10:39:08 +00:00
|
|
|
/* Generate packet encryption key */
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
myself->cipher = EVP_bf_cbc();
|
2000-10-29 22:10:44 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
myself->keylength = myself->cipher->key_len + myself->cipher->iv_len;
|
2000-10-29 10:39:08 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
myself->key = (char *)xmalloc(myself->keylength);
|
|
|
|
RAND_pseudo_bytes(myself->key, myself->keylength);
|
2000-10-29 10:39:08 +00:00
|
|
|
|
2001-10-27 15:19:13 +00:00
|
|
|
if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime))
|
2000-10-29 10:39:08 +00:00
|
|
|
keylifetime = 3600;
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2000-10-29 10:39:08 +00:00
|
|
|
keyexpires = time(NULL) + keylifetime;
|
2001-01-05 23:53:53 +00:00
|
|
|
cp
|
2001-07-20 20:25:10 +00:00
|
|
|
/* Done */
|
2001-01-05 23:53:53 +00:00
|
|
|
|
2001-09-25 13:39:11 +00:00
|
|
|
myself->nexthop = myself;
|
2001-10-08 11:47:55 +00:00
|
|
|
myself->via = myself;
|
2000-03-26 00:33:07 +00:00
|
|
|
myself->status.active = 1;
|
2001-10-27 12:13:17 +00:00
|
|
|
node_add(myself);
|
2000-03-26 00:33:07 +00:00
|
|
|
|
2000-06-29 13:04:15 +00:00
|
|
|
syslog(LOG_NOTICE, _("Ready: listening on port %hd"), myself->port);
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2000-03-26 00:33:07 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
setup all initial network connections
|
|
|
|
*/
|
|
|
|
int setup_network_connections(void)
|
|
|
|
{
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2000-11-20 19:41:13 +00:00
|
|
|
init_connections();
|
|
|
|
init_subnets();
|
2001-10-27 15:19:13 +00:00
|
|
|
init_nodes();
|
2000-11-20 19:41:13 +00:00
|
|
|
|
2001-10-27 15:19:13 +00:00
|
|
|
if(get_config_int(lookup_config(config_tree, "PingTimeout"), &timeout))
|
2000-11-04 20:44:28 +00:00
|
|
|
{
|
|
|
|
if(timeout < 1)
|
|
|
|
{
|
|
|
|
timeout = 86400;
|
|
|
|
}
|
2001-10-27 12:13:17 +00:00
|
|
|
}
|
|
|
|
else
|
|
|
|
timeout = 60;
|
2000-03-26 00:33:07 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(setup_device() < 0)
|
2000-03-26 00:33:07 +00:00
|
|
|
return -1;
|
|
|
|
|
2000-10-20 19:46:58 +00:00
|
|
|
/* Run tinc-up script to further initialize the tap interface */
|
2000-11-03 22:33:16 +00:00
|
|
|
execute_script("tinc-up");
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2000-11-24 23:13:07 +00:00
|
|
|
if(setup_myself() < 0)
|
|
|
|
return -1;
|
|
|
|
|
2001-09-01 12:36:06 +00:00
|
|
|
signal(SIGALRM, try_outgoing_connections);
|
|
|
|
alarm(5);
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2000-05-27 19:44:04 +00:00
|
|
|
return 0;
|
2000-03-26 00:33:07 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
close all open network connections
|
|
|
|
*/
|
|
|
|
void close_network_connections(void)
|
|
|
|
{
|
2001-07-20 20:25:10 +00:00
|
|
|
avl_node_t *node, *next;
|
2001-10-27 12:13:17 +00:00
|
|
|
connection_t *c;
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2001-07-20 20:25:10 +00:00
|
|
|
for(node = connection_tree->head; node; node = next)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2001-07-20 20:25:10 +00:00
|
|
|
next = node->next;
|
2001-10-27 12:13:17 +00:00
|
|
|
c = (connection_t *)node->data;
|
|
|
|
c->status.outgoing = 0;
|
|
|
|
terminate_connection(c, 0);
|
2000-03-26 00:33:07 +00:00
|
|
|
}
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
// terminate_connection(myself, 0);
|
2001-07-20 20:25:10 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
// destroy_trees();
|
2000-03-26 00:33:07 +00:00
|
|
|
|
2000-11-03 22:33:16 +00:00
|
|
|
execute_script("tinc-down");
|
2000-10-20 19:46:58 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
close_device();
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2000-03-26 00:33:07 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
handle an incoming tcp connect call and open
|
|
|
|
a connection to it.
|
|
|
|
*/
|
2000-11-20 19:12:17 +00:00
|
|
|
connection_t *create_new_connection(int sfd)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
connection_t *c;
|
2000-03-26 00:33:07 +00:00
|
|
|
struct sockaddr_in ci;
|
|
|
|
int len = sizeof(ci);
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2001-10-27 12:13:17 +00:00
|
|
|
c = new_connection();
|
2000-03-26 00:33:07 +00:00
|
|
|
|
2000-11-15 13:33:27 +00:00
|
|
|
if(getpeername(sfd, (struct sockaddr *) &ci, (socklen_t *) &len) < 0)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2000-11-02 22:05:36 +00:00
|
|
|
syslog(LOG_ERR, _("System call `%s' failed: %m"),
|
|
|
|
"getpeername");
|
2001-01-11 11:19:08 +00:00
|
|
|
close(sfd);
|
2000-03-26 00:33:07 +00:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
c->address = ntohl(ci.sin_addr.s_addr);
|
|
|
|
c->hostname = hostlookup(ci.sin_addr.s_addr);
|
|
|
|
c->port = htons(ci.sin_port); /* This one will be overwritten later */
|
|
|
|
c->socket = sfd;
|
|
|
|
c->last_ping_time = time(NULL);
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2000-10-21 11:52:08 +00:00
|
|
|
if(debug_lvl >= DEBUG_CONNECTIONS)
|
2000-06-26 20:30:21 +00:00
|
|
|
syslog(LOG_NOTICE, _("Connection from %s port %d"),
|
2001-10-27 12:13:17 +00:00
|
|
|
c->hostname, htons(ci.sin_port));
|
2000-03-26 00:33:07 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
c->allow_request = ID;
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2001-10-27 12:13:17 +00:00
|
|
|
return c;
|
2000-03-26 00:33:07 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
put all file descriptors in an fd_set array
|
|
|
|
*/
|
|
|
|
void build_fdset(fd_set *fs)
|
|
|
|
{
|
2001-01-05 23:53:53 +00:00
|
|
|
avl_node_t *node;
|
2001-10-27 12:13:17 +00:00
|
|
|
connection_t *c;
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2000-03-26 00:33:07 +00:00
|
|
|
FD_ZERO(fs);
|
|
|
|
|
2001-01-05 23:53:53 +00:00
|
|
|
for(node = connection_tree->head; node; node = node->next)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
c = (connection_t *)node->data;
|
|
|
|
FD_SET(c->socket, fs);
|
2000-03-26 00:33:07 +00:00
|
|
|
}
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
FD_SET(tcp_socket, fs);
|
|
|
|
FD_SET(udp_socket, fs);
|
|
|
|
FD_SET(device_fd, fs);
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2000-03-26 00:33:07 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
receive incoming data from the listening
|
|
|
|
udp socket and write it to the ethertap
|
|
|
|
device after being decrypted
|
|
|
|
*/
|
2001-03-04 13:59:32 +00:00
|
|
|
void handle_incoming_vpn_data(void)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2000-10-11 10:35:17 +00:00
|
|
|
vpn_packet_t pkt;
|
2000-03-26 00:33:07 +00:00
|
|
|
int x, l = sizeof(x);
|
2000-11-25 13:33:33 +00:00
|
|
|
struct sockaddr_in from;
|
|
|
|
socklen_t fromlen = sizeof(from);
|
2001-10-27 12:13:17 +00:00
|
|
|
node_t *n;
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2001-10-27 12:13:17 +00:00
|
|
|
if(getsockopt(udp_socket, SOL_SOCKET, SO_ERROR, &x, &l) < 0)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2000-10-11 10:35:17 +00:00
|
|
|
syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%m"),
|
2001-10-27 12:13:17 +00:00
|
|
|
__FILE__, __LINE__, udp_socket);
|
2001-03-04 13:59:32 +00:00
|
|
|
return;
|
2000-03-26 00:33:07 +00:00
|
|
|
}
|
|
|
|
if(x)
|
|
|
|
{
|
2000-10-11 10:35:17 +00:00
|
|
|
syslog(LOG_ERR, _("Incoming data socket error: %s"), strerror(x));
|
2001-03-04 13:59:32 +00:00
|
|
|
return;
|
2000-03-26 00:33:07 +00:00
|
|
|
}
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if((pkt.len = recvfrom(udp_socket, (char *) pkt.salt, MTU, 0, (struct sockaddr *)&from, &fromlen)) <= 0)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2000-10-11 10:35:17 +00:00
|
|
|
syslog(LOG_ERR, _("Receiving packet failed: %m"));
|
2001-03-04 13:59:32 +00:00
|
|
|
return;
|
2000-03-26 00:33:07 +00:00
|
|
|
}
|
2000-10-29 22:10:44 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
n = lookup_node_udp(ntohl(from.sin_addr.s_addr), ntohs(from.sin_port));
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(!n)
|
2000-11-25 13:33:33 +00:00
|
|
|
{
|
2001-01-05 23:53:53 +00:00
|
|
|
syslog(LOG_WARNING, _("Received UDP packets on port %hd from unknown source %x:%hd"), myself->port, ntohl(from.sin_addr.s_addr), ntohs(from.sin_port));
|
2001-03-04 13:59:32 +00:00
|
|
|
return;
|
2000-11-04 22:57:33 +00:00
|
|
|
}
|
2001-10-27 12:13:17 +00:00
|
|
|
/*
|
|
|
|
if(n->connection)
|
|
|
|
n->connection->last_ping_time = time(NULL);
|
|
|
|
*/
|
|
|
|
receive_udppacket(n, &pkt);
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2000-03-26 00:33:07 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2001-07-20 20:25:10 +00:00
|
|
|
Terminate a connection:
|
|
|
|
- Close the sockets
|
|
|
|
- Remove associated hosts and subnets
|
|
|
|
- Deactivate the host
|
|
|
|
- Since it might still be referenced, put it on the prune list.
|
2001-07-21 15:34:18 +00:00
|
|
|
- If report == 1, then send DEL_HOST messages to the other tinc daemons.
|
2000-03-26 00:33:07 +00:00
|
|
|
*/
|
2001-10-27 12:13:17 +00:00
|
|
|
void terminate_connection(connection_t *c, int report)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
/* Needs a serious rewrite. */
|
2000-03-26 00:33:07 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2000-05-14 13:02:20 +00:00
|
|
|
Check if the other end is active.
|
|
|
|
If we have sent packets, but didn't receive any,
|
|
|
|
then possibly the other end is dead. We send a
|
|
|
|
PING request over the meta connection. If the other
|
|
|
|
end does not reply in time, we consider them dead
|
|
|
|
and close the connection.
|
2000-03-26 00:33:07 +00:00
|
|
|
*/
|
2000-11-20 19:12:17 +00:00
|
|
|
void check_dead_connections(void)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2000-05-14 13:02:20 +00:00
|
|
|
time_t now;
|
2001-10-08 13:37:30 +00:00
|
|
|
avl_node_t *node, *next;
|
2001-10-27 12:13:17 +00:00
|
|
|
connection_t *c;
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2000-05-14 13:02:20 +00:00
|
|
|
now = time(NULL);
|
2000-11-20 19:12:17 +00:00
|
|
|
|
2001-10-08 13:37:30 +00:00
|
|
|
for(node = connection_tree->head; node; node = next)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2001-10-08 13:37:30 +00:00
|
|
|
next = node->next;
|
2001-10-27 12:13:17 +00:00
|
|
|
c = (connection_t *)node->data;
|
|
|
|
if(c->last_ping_time + timeout < now)
|
2000-11-20 19:12:17 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
if(c->status.active)
|
2000-05-14 13:06:52 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
if(c->status.pinged)
|
2000-05-14 13:06:52 +00:00
|
|
|
{
|
2000-10-21 11:52:08 +00:00
|
|
|
if(debug_lvl >= DEBUG_PROTOCOL)
|
2000-09-14 21:51:21 +00:00
|
|
|
syslog(LOG_INFO, _("%s (%s) didn't respond to PING"),
|
2001-10-27 12:13:17 +00:00
|
|
|
c->name, c->hostname);
|
|
|
|
c->status.timeout = 1;
|
|
|
|
terminate_connection(c, 1);
|
2000-05-14 13:06:52 +00:00
|
|
|
}
|
2000-11-04 20:44:28 +00:00
|
|
|
else
|
2000-05-14 13:06:52 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
send_ping(c);
|
2000-05-14 13:06:52 +00:00
|
|
|
}
|
|
|
|
}
|
2001-10-08 13:37:30 +00:00
|
|
|
else
|
|
|
|
{
|
|
|
|
if(debug_lvl >= DEBUG_CONNECTIONS)
|
|
|
|
syslog(LOG_WARNING, _("Timeout from %s (%s) during authentication"),
|
2001-10-27 12:13:17 +00:00
|
|
|
c->name, c->hostname);
|
|
|
|
terminate_connection(c, 0);
|
2001-10-08 13:37:30 +00:00
|
|
|
}
|
2000-11-20 19:12:17 +00:00
|
|
|
}
|
2000-03-26 00:33:07 +00:00
|
|
|
}
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2000-03-26 00:33:07 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
accept a new tcp connect and create a
|
|
|
|
new connection
|
|
|
|
*/
|
2000-10-11 10:35:17 +00:00
|
|
|
int handle_new_meta_connection()
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
connection_t *new;
|
2000-03-26 00:33:07 +00:00
|
|
|
struct sockaddr client;
|
2001-10-27 12:13:17 +00:00
|
|
|
int fd, len = sizeof(client);
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2001-10-27 12:13:17 +00:00
|
|
|
if((fd = accept(tcp_socket, &client, &len)) < 0)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2000-05-29 21:01:26 +00:00
|
|
|
syslog(LOG_ERR, _("Accepting a new connection failed: %m"));
|
2000-03-26 00:33:07 +00:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(!(new = create_new_connection(fd)))
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
shutdown(fd, 2);
|
|
|
|
close(fd);
|
2000-06-25 15:16:12 +00:00
|
|
|
syslog(LOG_NOTICE, _("Closed attempted connection"));
|
2000-03-26 00:33:07 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
connection_add(new);
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
send_id(new);
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2000-03-26 00:33:07 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
void randomized_alarm(int seconds)
|
|
|
|
{
|
|
|
|
unsigned char r;
|
|
|
|
RAND_pseudo_bytes(&r, 1);
|
|
|
|
alarm((seconds * (int)r) / 128 + 1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* This function is severely fucked up.
|
|
|
|
We want to redesign it so the following rules apply:
|
|
|
|
|
|
|
|
- Try all ConnectTo's in a row:
|
|
|
|
- if a connect() fails, try next one immediately,
|
|
|
|
- if it works, wait 5 seconds or so.
|
|
|
|
- If none of them were succesful, increase delay and retry.
|
|
|
|
- If all were succesful, don't try anymore.
|
2000-03-26 00:33:07 +00:00
|
|
|
*/
|
2001-10-27 12:13:17 +00:00
|
|
|
|
|
|
|
RETSIGTYPE
|
|
|
|
try_outgoing_connections(int a)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
static config_t *cfg = NULL;
|
|
|
|
static int retry = 0;
|
|
|
|
char *name;
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2001-10-27 12:13:17 +00:00
|
|
|
if(!cfg)
|
|
|
|
cfg = lookup_config(config_tree, "ConnectTo");
|
2000-11-25 13:33:33 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(!cfg)
|
|
|
|
return;
|
|
|
|
|
|
|
|
while(cfg)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
get_config_string(cfg, &name);
|
|
|
|
cfg = lookup_config_next(config_tree, cfg); /* Next time skip to next ConnectTo line */
|
2000-11-20 19:12:17 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(!setup_outgoing_connection(name)) /* function returns 0 when there are no problems */
|
|
|
|
retry = 1;
|
2000-04-25 18:57:23 +00:00
|
|
|
|
2000-03-26 00:33:07 +00:00
|
|
|
}
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
get_config_int(lookup_config(config_tree, "MaxTimeout"), &maxtimeout);
|
|
|
|
|
|
|
|
if(retry)
|
|
|
|
{
|
|
|
|
seconds_till_retry += 5;
|
|
|
|
if(seconds_till_retry > maxtimeout) /* Don't wait more than MAXTIMEOUT seconds. */
|
|
|
|
seconds_till_retry = maxtimeout;
|
|
|
|
|
|
|
|
syslog(LOG_ERR, _("Failed to setup all outgoing connections, will retry in %d seconds"),
|
|
|
|
seconds_till_retry);
|
|
|
|
|
|
|
|
/* Randomize timeout to avoid global synchronisation effects */
|
|
|
|
randomized_alarm(seconds_till_retry);
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
seconds_till_retry = 5;
|
|
|
|
}
|
2000-03-26 00:33:07 +00:00
|
|
|
cp
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2001-10-27 12:13:17 +00:00
|
|
|
check all connections to see if anything
|
|
|
|
happened on their sockets
|
2000-03-26 00:33:07 +00:00
|
|
|
*/
|
2001-10-27 12:13:17 +00:00
|
|
|
void check_network_activity(fd_set *f)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
connection_t *c;
|
|
|
|
avl_node_t *node;
|
2001-03-04 13:59:32 +00:00
|
|
|
cp
|
2001-10-27 12:13:17 +00:00
|
|
|
if(FD_ISSET(udp_socket, f))
|
|
|
|
handle_incoming_vpn_data();
|
2000-03-26 00:33:07 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
for(node = connection_tree->head; node; node = node->next)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
2001-10-27 12:13:17 +00:00
|
|
|
c = (connection_t *)node->data;
|
2000-03-26 00:33:07 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(c->status.remove)
|
|
|
|
return;
|
|
|
|
|
|
|
|
if(FD_ISSET(c->socket, f))
|
|
|
|
if(receive_meta(c) < 0)
|
|
|
|
{
|
|
|
|
terminate_connection(c, c->status.active);
|
|
|
|
return;
|
|
|
|
}
|
2000-10-24 15:46:18 +00:00
|
|
|
}
|
2000-03-26 00:33:07 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
if(FD_ISSET(tcp_socket, f))
|
|
|
|
handle_new_meta_connection();
|
2000-03-26 00:33:07 +00:00
|
|
|
cp
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2000-04-30 01:15:47 +00:00
|
|
|
this is where it all happens...
|
2000-03-26 00:33:07 +00:00
|
|
|
*/
|
|
|
|
void main_loop(void)
|
|
|
|
{
|
|
|
|
fd_set fset;
|
|
|
|
struct timeval tv;
|
|
|
|
int r;
|
2000-05-14 13:02:20 +00:00
|
|
|
time_t last_ping_check;
|
2000-10-29 10:39:08 +00:00
|
|
|
int t;
|
2001-10-27 13:13:35 +00:00
|
|
|
vpn_packet_t packet;
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2000-05-14 13:02:20 +00:00
|
|
|
last_ping_check = time(NULL);
|
2000-03-26 00:33:07 +00:00
|
|
|
|
|
|
|
for(;;)
|
|
|
|
{
|
|
|
|
tv.tv_sec = timeout;
|
|
|
|
tv.tv_usec = 0;
|
|
|
|
|
|
|
|
build_fdset(&fset);
|
|
|
|
|
|
|
|
if((r = select(FD_SETSIZE, &fset, NULL, NULL, &tv)) < 0)
|
|
|
|
{
|
2000-06-29 19:47:04 +00:00
|
|
|
if(errno != EINTR) /* because of alarm */
|
|
|
|
{
|
|
|
|
syslog(LOG_ERR, _("Error while waiting for input: %m"));
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if(sighup)
|
|
|
|
{
|
2000-10-29 02:07:41 +00:00
|
|
|
syslog(LOG_INFO, _("Rereading configuration file and restarting in 5 seconds"));
|
2000-06-30 11:45:16 +00:00
|
|
|
sighup = 0;
|
2000-06-29 19:47:04 +00:00
|
|
|
close_network_connections();
|
2001-10-27 12:13:17 +00:00
|
|
|
exit_configuration(&config_tree);
|
2000-10-29 02:07:41 +00:00
|
|
|
|
|
|
|
if(read_server_config())
|
2000-06-29 19:47:04 +00:00
|
|
|
{
|
2000-06-30 11:45:16 +00:00
|
|
|
syslog(LOG_ERR, _("Unable to reread configuration file, exiting"));
|
2001-03-01 21:32:04 +00:00
|
|
|
exit(1);
|
2000-06-29 19:47:04 +00:00
|
|
|
}
|
2000-10-29 02:07:41 +00:00
|
|
|
|
2000-06-30 12:41:06 +00:00
|
|
|
sleep(5);
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2000-10-29 02:07:41 +00:00
|
|
|
if(setup_network_connections())
|
|
|
|
return;
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2000-06-29 19:47:04 +00:00
|
|
|
continue;
|
2000-03-26 00:33:07 +00:00
|
|
|
}
|
|
|
|
|
2000-10-29 10:39:08 +00:00
|
|
|
t = time(NULL);
|
|
|
|
|
|
|
|
/* Let's check if everybody is still alive */
|
|
|
|
|
|
|
|
if(last_ping_check + timeout < t)
|
2000-03-26 00:33:07 +00:00
|
|
|
{
|
|
|
|
check_dead_connections();
|
2000-05-14 13:02:20 +00:00
|
|
|
last_ping_check = time(NULL);
|
2000-10-29 10:39:08 +00:00
|
|
|
|
|
|
|
/* Should we regenerate our key? */
|
|
|
|
|
|
|
|
if(keyexpires < t)
|
|
|
|
{
|
|
|
|
if(debug_lvl >= DEBUG_STATUS)
|
|
|
|
syslog(LOG_INFO, _("Regenerating symmetric key"));
|
2001-03-04 13:59:32 +00:00
|
|
|
|
2001-10-27 12:13:17 +00:00
|
|
|
RAND_pseudo_bytes(myself->key, myself->keylength);
|
|
|
|
send_key_changed(myself->connection, myself);
|
2000-10-29 10:39:08 +00:00
|
|
|
keyexpires = time(NULL) + keylifetime;
|
|
|
|
}
|
2000-03-26 00:33:07 +00:00
|
|
|
}
|
|
|
|
|
2000-06-30 11:45:16 +00:00
|
|
|
if(r > 0)
|
|
|
|
{
|
|
|
|
check_network_activity(&fset);
|
2000-03-26 00:33:07 +00:00
|
|
|
|
2000-06-30 11:45:16 +00:00
|
|
|
/* local tap data */
|
2001-10-27 12:13:17 +00:00
|
|
|
if(FD_ISSET(device_fd, &fset))
|
2001-10-27 13:13:35 +00:00
|
|
|
{
|
|
|
|
if(read_packet(&packet))
|
|
|
|
route_outgoing(&packet);
|
|
|
|
else
|
|
|
|
return;
|
|
|
|
}
|
2000-06-30 11:45:16 +00:00
|
|
|
}
|
2000-03-26 00:33:07 +00:00
|
|
|
}
|
2000-04-25 18:57:23 +00:00
|
|
|
cp
|
2000-03-26 00:33:07 +00:00
|
|
|
}
|