/*
net_packet.c -- Handles in- and outgoing VPN packets
- Copyright (C) 1998-2002 Ivo Timmermans <itimmermans@bigfoot.com>,
- 2000-2002 Guus Sliepen <guus@sliepen.warande.net>
+ Copyright (C) 1998-2002 Ivo Timmermans <ivo@o2w.nl>,
+ 2000-2002 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_packet.c,v 1.1.2.8 2002/03/01 15:14:29 guus Exp $
+ $Id: net_packet.c,v 1.1.2.21 2002/09/09 19:39:58 guus Exp $
*/
#include "config.h"
#include <fcntl.h>
#include <netdb.h>
#include <netinet/in.h>
-#ifdef HAVE_LINUX
+#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 <openssl/pem.h>
#include <openssl/hmac.h>
-#ifndef HAVE_RAND_PSEUDO_BYTES
-#define RAND_pseudo_bytes RAND_bytes
-#endif
-
#include <zlib.h>
#include <utils.h>
long int complen = MTU + 12;
EVP_CIPHER_CTX ctx;
char hmac[EVP_MAX_MD_SIZE];
-cp
+ cp();
/* Check the message authentication code */
if(myself->digest && myself->maclength)
HMAC(myself->digest, myself->key, myself->keylength, (char *)&inpkt->seqno, inpkt->len, hmac, NULL);
if(memcmp(hmac, (char *)&inpkt->seqno + inpkt->len, myself->maclength))
{
- syslog(LOG_DEBUG, _("Got unauthenticated packet from %s (%s)"), n->name, n->hostname);
+ if(debug_lvl >= DEBUG_TRAFFIC)
+ syslog(LOG_DEBUG, _("Got unauthenticated packet from %s (%s)"), n->name, n->hostname);
return;
}
}
if(inpkt->seqno <= n->received_seqno)
{
- syslog(LOG_DEBUG, _("Got late or replayed packet from %s (%s), seqno %d"), n->name, n->hostname, inpkt->seqno);
+ if(debug_lvl >= DEBUG_TRAFFIC)
+ syslog(LOG_DEBUG, _("Got late or replayed packet from %s (%s), seqno %d"), n->name, n->hostname, inpkt->seqno);
return;
}
}
receive_packet(n, inpkt);
-cp
+ cp();
}
void receive_tcppacket(connection_t *c, char *buffer, int len)
{
vpn_packet_t outpkt;
-cp
+ cp();
outpkt.len = len;
memcpy(outpkt.data, buffer, len);
receive_packet(c->node, &outpkt);
-cp
+ cp();
}
void receive_packet(node_t *n, vpn_packet_t *packet)
{
-cp
+ 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
+ cp();
}
void send_udppacket(node_t *n, vpn_packet_t *inpkt)
vpn_packet_t *copy;
static int priority = 0;
int origpriority;
-cp
+ int sock;
+ cp();
+ /* Make sure we have a valid key */
+
if(!n->status.validkey)
{
if(debug_lvl >= DEBUG_TRAFFIC)
list_insert_tail(n->queue, copy);
+ if(n->queue->count > MAXQUEUELENGTH)
+ list_delete_head(n->queue);
+
if(!n->status.waitingforkey)
send_req_key(n->nexthop->connection, myself, n);
+ n->status.waitingforkey = 1;
+
return;
}
inpkt->len += n->maclength;
}
+ /* Determine which socket we have to use */
+
+ for(sock = 0; sock < listen_sockets; sock++)
+ if(n->address.sa.sa_family == listen_socket[sock].sa.sa.sa_family)
+ break;
+
+ if(sock >= listen_sockets)
+ sock = 0; /* If none is available, just use the first and hope for the best. */
+
/* Send the packet */
#if defined(SOL_IP) && defined(IP_TOS)
- if(priorityinheritance && origpriority != priority)
+ if(priorityinheritance && origpriority != priority && listen_socket[sock].sa.sa.sa_family == AF_INET)
{
priority = origpriority;
if(debug_lvl >= DEBUG_TRAFFIC)
syslog(LOG_DEBUG, _("Setting outgoing packet priority to %d"), priority);
- if(setsockopt(udp_socket[0], SOL_IP, IP_TOS, &priority, sizeof(priority))) /* SO_PRIORITY doesn't seem to work */
+ if(setsockopt(sock, SOL_IP, IP_TOS, &priority, sizeof(priority))) /* SO_PRIORITY doesn't seem to work */
syslog(LOG_ERR, _("System call `%s' failed: %s"), "setsockopt", strerror(errno));
}
#endif
- if((sendto(udp_socket[0], (char *)&inpkt->seqno, inpkt->len, 0, &(n->address.sa), SALEN(n->address.sa))) < 0)
+ if((sendto(listen_socket[sock].udp, (char *)&inpkt->seqno, inpkt->len, 0, &(n->address.sa), SALEN(n->address.sa))) < 0)
{
syslog(LOG_ERR, _("Error sending packet to %s (%s): %s"),
n->name, n->hostname, strerror(errno));
}
inpkt->len = origlen;
-cp
+ cp();
}
/*
void send_packet(node_t *n, vpn_packet_t *packet)
{
node_t *via;
-cp
+ cp();
if(debug_lvl >= DEBUG_TRAFFIC)
syslog(LOG_ERR, _("Sending packet of %d bytes to %s (%s)"),
packet->len, n->name, n->hostname);
{
avl_node_t *node;
connection_t *c;
-cp
+ cp();
if(debug_lvl >= DEBUG_TRAFFIC)
syslog(LOG_INFO, _("Broadcasting packet of %d bytes from %s (%s)"),
packet->len, from->name, from->hostname);
if(c->status.active && c->status.mst && c != from->nexthop->connection)
send_packet(c->node, packet);
}
-cp
+ cp();
}
void flush_queue(node_t *n)
{
list_node_t *node, *next;
-cp
+ cp();
if(debug_lvl >= DEBUG_TRAFFIC)
syslog(LOG_INFO, _("Flushing queue for %s (%s)"), n->name, n->hostname);
send_udppacket(n, (vpn_packet_t *)node->data);
list_delete_node(n->queue, node);
}
-cp
+ cp();
}
void handle_incoming_vpn_data(int sock)
sockaddr_t from;
socklen_t fromlen = sizeof(from);
node_t *n;
-cp
+ cp();
if(getsockopt(sock, SOL_SOCKET, SO_ERROR, &x, &l) < 0)
{
syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%s"),
return;
}
- if((pkt.len = recvfrom(sock, (char *)&pkt.seqno, MAXSIZE, 0, &from.sa, &fromlen)) <= 0)
+ pkt.len = recvfrom(sock, (char *)&pkt.seqno, MAXSIZE, 0, &from.sa, &fromlen);
+
+ if(pkt.len <= 0)
{
syslog(LOG_ERR, _("Receiving packet failed: %s"), strerror(errno));
return;
}
+ sockaddrunmap(&from); /* Some braindead IPv6 implementations do stupid things. */
+
n = lookup_node_udp(&from);
if(!n)
n->connection->last_ping_time = now;
receive_udppacket(n, &pkt);
-cp
+ cp();
}
-
projects / tinc / blobdiff