X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fnet_packet.c;h=00733b6fbd12c22b4dce6523632b01eb9e1ddd6f;hp=db31b770aec2c41b624a2957f83429313fdb328c;hb=f75dcef72a81a337e847adf0bae54198894f65b9;hpb=5fc1ed17f41f0c535cf57a4b7e00cd6d45759503

diff --git a/src/net_packet.c b/src/net_packet.c
index db31b770..00733b6f 100644
--- a/src/net_packet.c
+++ b/src/net_packet.c
@@ -17,7 +17,7 @@
     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 1.1.2.21 2002/09/09 19:39:58 guus Exp $
+    $Id: net_packet.c,v 1.1.2.22 2002/09/09 21:24:41 guus Exp $
 */
 
 #include "config.h"
@@ -27,13 +27,13 @@
 #include <netdb.h>
 #include <netinet/in.h>
 #ifdef HAVE_NETINET_IN_SYSTM_H
- #include <netinet/in_systm.h>
+#include <netinet/in_systm.h>
 #endif
 #ifdef HAVE_NETINET_IP_H
- #include <netinet/ip.h>
+#include <netinet/ip.h>
 #endif
 #ifdef HAVE_NETINET_TCP_H
- #include <netinet/tcp.h>
+#include <netinet/tcp.h>
 #endif
 #include <stdio.h>
 #include <stdlib.h>
@@ -85,349 +85,353 @@ int keyexpires = 0;
 
 /* VPN packet I/O */
 
-void receive_udppacket(node_t *n, vpn_packet_t *inpkt)
+void receive_udppacket(node_t * n, vpn_packet_t * inpkt)
 {
-  vpn_packet_t pkt1, pkt2;
-  vpn_packet_t *pkt[] = {&pkt1, &pkt2, &pkt1, &pkt2};
-  int nextpkt = 0;
-  vpn_packet_t *outpkt = pkt[0];
-  int outlen, outpad;
-  long int complen = MTU + 12;
-  EVP_CIPHER_CTX ctx;
-  char hmac[EVP_MAX_MD_SIZE];
-  cp();
-  /* Check the message authentication code */
-
-  if(myself->digest && myself->maclength)
-    {
-      inpkt->len -= 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))
-        {
-          if(debug_lvl >= DEBUG_TRAFFIC)
-            syslog(LOG_DEBUG, _("Got unauthenticated packet from %s (%s)"), n->name, n->hostname);
-          return;
-        }
-    }
-
-  /* Decrypt the packet */
-
-  if(myself->cipher)
-  {
-    outpkt = pkt[nextpkt++];
-
-    EVP_DecryptInit(&ctx, myself->cipher, myself->key, myself->key + myself->cipher->key_len);
-    EVP_DecryptUpdate(&ctx, (char *)&outpkt->seqno, &outlen, (char *)&inpkt->seqno, inpkt->len);
-    EVP_DecryptFinal(&ctx, (char *)&outpkt->seqno + outlen, &outpad);
-
-    outpkt->len = outlen + outpad;
-    inpkt = outpkt;
-  }
-
-  /* Check the sequence number */
-
-  inpkt->len -= sizeof(inpkt->seqno);
-  inpkt->seqno = ntohl(inpkt->seqno);
-
-  if(inpkt->seqno <= n->received_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;
-  }
-  
-  n->received_seqno = inpkt->seqno;
-
-  if(n->received_seqno > MAX_SEQNO)
-    keyexpires = 0;
-
-  /* Decompress the packet */
-  
-  if(myself->compression)
-  {
-    outpkt = pkt[nextpkt++];
-
-    if(uncompress(outpkt->data, &complen, inpkt->data, inpkt->len) != Z_OK)
-    {
-      syslog(LOG_ERR, _("Error while uncompressing packet from %s (%s)"), n->name, n->hostname);
-      return;
-    }
-    
-    outpkt->len = complen;
-    inpkt = outpkt;
-  }
-
-  receive_packet(n, inpkt);
-  cp();
+	vpn_packet_t pkt1, pkt2;
+	vpn_packet_t *pkt[] = { &pkt1, &pkt2, &pkt1, &pkt2 };
+	int nextpkt = 0;
+	vpn_packet_t *outpkt = pkt[0];
+	int outlen, outpad;
+	long int complen = MTU + 12;
+	EVP_CIPHER_CTX ctx;
+	char hmac[EVP_MAX_MD_SIZE];
+
+	cp();
+
+	/* Check the message authentication code */
+
+	if(myself->digest && myself->maclength) {
+		inpkt->len -= 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)) {
+			if(debug_lvl >= DEBUG_TRAFFIC)
+				syslog(LOG_DEBUG, _("Got unauthenticated packet from %s (%s)"),
+					   n->name, n->hostname);
+			return;
+		}
+	}
+
+	/* Decrypt the packet */
+
+	if(myself->cipher) {
+		outpkt = pkt[nextpkt++];
+
+		EVP_DecryptInit(&ctx, myself->cipher, myself->key,
+						myself->key + myself->cipher->key_len);
+		EVP_DecryptUpdate(&ctx, (char *) &outpkt->seqno, &outlen,
+						  (char *) &inpkt->seqno, inpkt->len);
+		EVP_DecryptFinal(&ctx, (char *) &outpkt->seqno + outlen, &outpad);
+
+		outpkt->len = outlen + outpad;
+		inpkt = outpkt;
+	}
+
+	/* Check the sequence number */
+
+	inpkt->len -= sizeof(inpkt->seqno);
+	inpkt->seqno = ntohl(inpkt->seqno);
+
+	if(inpkt->seqno <= n->received_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;
+	}
+
+	n->received_seqno = inpkt->seqno;
+
+	if(n->received_seqno > MAX_SEQNO)
+		keyexpires = 0;
+
+	/* Decompress the packet */
+
+	if(myself->compression) {
+		outpkt = pkt[nextpkt++];
+
+		if(uncompress(outpkt->data, &complen, inpkt->data, inpkt->len) != Z_OK) {
+			syslog(LOG_ERR, _("Error while uncompressing packet from %s (%s)"),
+				   n->name, n->hostname);
+			return;
+		}
+
+		outpkt->len = complen;
+		inpkt = outpkt;
+	}
+
+	receive_packet(n, inpkt);
 }
 
-void receive_tcppacket(connection_t *c, char *buffer, int len)
+void receive_tcppacket(connection_t * c, char *buffer, int len)
 {
-  vpn_packet_t outpkt;
-  cp();
-  outpkt.len = len;
-  memcpy(outpkt.data, buffer, len);
+	vpn_packet_t outpkt;
+
+	cp();
 
-  receive_packet(c->node, &outpkt);
-  cp();
+	outpkt.len = len;
+	memcpy(outpkt.data, buffer, len);
+
+	receive_packet(c->node, &outpkt);
 }
 
-void receive_packet(node_t *n, vpn_packet_t *packet)
+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);
+	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();
+	route_incoming(n, packet);
 }
 
-void send_udppacket(node_t *n, vpn_packet_t *inpkt)
+void send_udppacket(node_t * n, vpn_packet_t * inpkt)
 {
-  vpn_packet_t pkt1, pkt2;
-  vpn_packet_t *pkt[] = {&pkt1, &pkt2, &pkt1, &pkt2};
-  int nextpkt = 0;
-  vpn_packet_t *outpkt;
-  int origlen;
-  int outlen, outpad;
-  long int complen = MTU + 12;
-  EVP_CIPHER_CTX ctx;
-  vpn_packet_t *copy;
-  static int priority = 0;
-  int origpriority;
-  int sock;
-  cp();
-  /* Make sure we have a valid key */
+	vpn_packet_t pkt1, pkt2;
+	vpn_packet_t *pkt[] = { &pkt1, &pkt2, &pkt1, &pkt2 };
+	int nextpkt = 0;
+	vpn_packet_t *outpkt;
+	int origlen;
+	int outlen, outpad;
+	long int complen = MTU + 12;
+	EVP_CIPHER_CTX ctx;
+	vpn_packet_t *copy;
+	static int priority = 0;
+	int origpriority;
+	int sock;
 
-  if(!n->status.validkey)
-    {
-      if(debug_lvl >= DEBUG_TRAFFIC)
-        syslog(LOG_INFO, _("No valid key known yet for %s (%s), queueing packet"),
-               n->name, n->hostname);
+	cp();
 
-      /* Since packet is on the stack of handle_tap_input(),
-         we have to make a copy of it first. */
+	/* Make sure we have a valid key */
 
-      copy = xmalloc(sizeof(vpn_packet_t));
-      memcpy(copy, inpkt, sizeof(vpn_packet_t));
+	if(!n->status.validkey) {
+		if(debug_lvl >= DEBUG_TRAFFIC)
+			syslog(LOG_INFO,
+				   _("No valid key known yet for %s (%s), queueing packet"),
+				   n->name, n->hostname);
 
-      list_insert_tail(n->queue, copy);
+		/* Since packet is on the stack of handle_tap_input(), we have to make a copy of it first. */
 
-      if(n->queue->count > MAXQUEUELENGTH)
-        list_delete_head(n->queue);
+		copy = xmalloc(sizeof(vpn_packet_t));
+		memcpy(copy, inpkt, sizeof(vpn_packet_t));
 
-      if(!n->status.waitingforkey)
-        send_req_key(n->nexthop->connection, myself, n);
+		list_insert_tail(n->queue, copy);
 
-      n->status.waitingforkey = 1;
+		if(n->queue->count > MAXQUEUELENGTH)
+			list_delete_head(n->queue);
 
-      return;
-    }
+		if(!n->status.waitingforkey)
+			send_req_key(n->nexthop->connection, myself, n);
 
-  origlen = inpkt->len;
-  origpriority = inpkt->priority;
+		n->status.waitingforkey = 1;
 
-  /* Compress the packet */
+		return;
+	}
 
-  if(n->compression)
-  {
-    outpkt = pkt[nextpkt++];
+	origlen = inpkt->len;
+	origpriority = inpkt->priority;
 
-    if(compress2(outpkt->data, &complen, inpkt->data, inpkt->len, n->compression) != Z_OK)
-    {
-      syslog(LOG_ERR, _("Error while compressing packet to %s (%s)"), n->name, n->hostname);
-      return;
-    }
-    
-    outpkt->len = complen;
-    inpkt = outpkt;
-  }
+	/* Compress the packet */
 
-  /* Add sequence number */
+	if(n->compression) {
+		outpkt = pkt[nextpkt++];
 
-  inpkt->seqno = htonl(++(n->sent_seqno));
-  inpkt->len += sizeof(inpkt->seqno);
+		if(compress2
+		   (outpkt->data, &complen, inpkt->data, inpkt->len,
+			n->compression) != Z_OK) {
+			syslog(LOG_ERR, _("Error while compressing packet to %s (%s)"),
+				   n->name, n->hostname);
+			return;
+		}
 
-  /* Encrypt the packet */
+		outpkt->len = complen;
+		inpkt = outpkt;
+	}
 
-  if(n->cipher)
-  {
-    outpkt = pkt[nextpkt++];
+	/* Add sequence number */
 
-    EVP_EncryptInit(&ctx, n->cipher, n->key, n->key + n->cipher->key_len);
-    EVP_EncryptUpdate(&ctx, (char *)&outpkt->seqno, &outlen, (char *)&inpkt->seqno, inpkt->len);
-    EVP_EncryptFinal(&ctx, (char *)&outpkt->seqno + outlen, &outpad);
+	inpkt->seqno = htonl(++(n->sent_seqno));
+	inpkt->len += sizeof(inpkt->seqno);
 
-    outpkt->len = outlen + outpad;
-    inpkt = outpkt;
-  }
+	/* Encrypt the packet */
 
-  /* Add the message authentication code */
+	if(n->cipher) {
+		outpkt = pkt[nextpkt++];
 
-  if(n->digest && n->maclength)
-    {
-      HMAC(n->digest, n->key, n->keylength, (char *)&inpkt->seqno, inpkt->len, (char *)&inpkt->seqno + inpkt->len, &outlen);
-      inpkt->len += n->maclength;
-    }
+		EVP_EncryptInit(&ctx, n->cipher, n->key, n->key + n->cipher->key_len);
+		EVP_EncryptUpdate(&ctx, (char *) &outpkt->seqno, &outlen,
+						  (char *) &inpkt->seqno, inpkt->len);
+		EVP_EncryptFinal(&ctx, (char *) &outpkt->seqno + outlen, &outpad);
 
-  /* Determine which socket we have to use */
+		outpkt->len = outlen + outpad;
+		inpkt = outpkt;
+	}
 
-  for(sock = 0; sock < listen_sockets; sock++)
-    if(n->address.sa.sa_family == listen_socket[sock].sa.sa.sa_family)
-      break;
+	/* Add the message authentication code */
 
-  if(sock >= listen_sockets)
-    sock = 0;  /* If none is available, just use the first and hope for the best. */
-  
-  /* Send the packet */
+	if(n->digest && n->maclength) {
+		HMAC(n->digest, n->key, n->keylength, (char *) &inpkt->seqno,
+			 inpkt->len, (char *) &inpkt->seqno + inpkt->len, &outlen);
+		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 && 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(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));
-    }
+	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(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(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));
-      return;
-    }
-  
-  inpkt->len = origlen;
-  cp();
+	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));
+		return;
+	}
+
+	inpkt->len = origlen;
 }
 
 /*
   send a packet to the given vpn ip.
 */
-void send_packet(node_t *n, vpn_packet_t *packet)
+void send_packet(node_t * n, vpn_packet_t * packet)
 {
-  node_t *via;
-  cp();
-  if(debug_lvl >= DEBUG_TRAFFIC)
-    syslog(LOG_ERR, _("Sending packet of %d bytes to %s (%s)"),
-           packet->len, n->name, n->hostname);
-
-  if(n == myself)
-    {
-      if(debug_lvl >= DEBUG_TRAFFIC)
-        {
-          syslog(LOG_NOTICE, _("Packet is looping back to us!"));
-        }
-
-      return;
-    }
- 
-  if(!n->status.reachable)
-    {
-      if(debug_lvl >= DEBUG_TRAFFIC)
-        syslog(LOG_INFO, _("Node %s (%s) is not reachable"),
-               n->name, n->hostname);
-      return;
-    }
-
-  via = (n->via == myself)?n->nexthop:n->via;
-
-  if(via != n && debug_lvl >= DEBUG_TRAFFIC)
-    syslog(LOG_ERR, _("Sending packet to %s via %s (%s)"),
-           n->name, via->name, n->via->hostname);
-
-  if((myself->options | via->options) & OPTION_TCPONLY)
-    {
-      if(send_tcppacket(via->connection, packet))
-        terminate_connection(via->connection, 1);
-    }
-  else
-    send_udppacket(via, packet);
+	node_t *via;
+
+	cp();
+
+	if(debug_lvl >= DEBUG_TRAFFIC)
+		syslog(LOG_ERR, _("Sending packet of %d bytes to %s (%s)"),
+			   packet->len, n->name, n->hostname);
+
+	if(n == myself) {
+		if(debug_lvl >= DEBUG_TRAFFIC)
+			syslog(LOG_NOTICE, _("Packet is looping back to us!"));
+
+		return;
+	}
+
+	if(!n->status.reachable) {
+		if(debug_lvl >= DEBUG_TRAFFIC)
+			syslog(LOG_INFO, _("Node %s (%s) is not reachable"),
+				   n->name, n->hostname);
+
+		return;
+	}
+
+	via = (n->via == myself) ? n->nexthop : n->via;
+
+	if(via != n && debug_lvl >= DEBUG_TRAFFIC)
+		syslog(LOG_ERR, _("Sending packet to %s via %s (%s)"),
+			   n->name, via->name, n->via->hostname);
+
+	if((myself->options | via->options) & OPTION_TCPONLY) {
+		if(send_tcppacket(via->connection, packet))
+			terminate_connection(via->connection, 1);
+	} else
+		send_udppacket(via, packet);
 }
 
 /* Broadcast a packet using the minimum spanning tree */
 
-void broadcast_packet(node_t *from, vpn_packet_t *packet)
+void broadcast_packet(node_t * from, vpn_packet_t * packet)
 {
-  avl_node_t *node;
-  connection_t *c;
-  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)
-    {
-      c = (connection_t *)node->data;
-      if(c->status.active && c->status.mst && c != from->nexthop->connection)
-        send_packet(c->node, packet);
-    }
-  cp();
+	avl_node_t *node;
+	connection_t *c;
+
+	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) {
+		c = (connection_t *) node->data;
+
+		if(c->status.active && c->status.mst && c != from->nexthop->connection)
+			send_packet(c->node, packet);
+	}
 }
 
-void flush_queue(node_t *n)
+void flush_queue(node_t * n)
 {
-  list_node_t *node, *next;
-  cp();
-  if(debug_lvl >= DEBUG_TRAFFIC)
-    syslog(LOG_INFO, _("Flushing queue for %s (%s)"), n->name, n->hostname);
-
-  for(node = n->queue->head; node; node = next)
-    {
-      next = node->next;
-      send_udppacket(n, (vpn_packet_t *)node->data);
-      list_delete_node(n->queue, node);
-    }
-  cp();
+	list_node_t *node, *next;
+
+	cp();
+
+	if(debug_lvl >= DEBUG_TRAFFIC)
+		syslog(LOG_INFO, _("Flushing queue for %s (%s)"), n->name, n->hostname);
+
+	for(node = n->queue->head; node; node = next) {
+		next = node->next;
+		send_udppacket(n, (vpn_packet_t *) node->data);
+		list_delete_node(n->queue, node);
+	}
 }
 
 void handle_incoming_vpn_data(int sock)
 {
-  vpn_packet_t pkt;
-  int x, l = sizeof(x);
-  char *hostname;
-  sockaddr_t from;
-  socklen_t fromlen = sizeof(from);
-  node_t *n;
-  cp();
-  if(getsockopt(sock, SOL_SOCKET, SO_ERROR, &x, &l) < 0)
-    {
-      syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%s"),
-             __FILE__, __LINE__, sock, strerror(errno));
-      cp_trace();
-      exit(1);
-    }
-  if(x)
-    {
-      syslog(LOG_ERR, _("Incoming data socket error: %s"), strerror(x));
-      return;
-    }
-
-  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)
-    {
-      hostname = sockaddr2hostname(&from);
-      syslog(LOG_WARNING, _("Received UDP packet from unknown source %s"), hostname);
-      free(hostname);
-      return;
-    }
-
-  if(n->connection)
-    n->connection->last_ping_time = now;
-
-  receive_udppacket(n, &pkt);
-  cp();
+	vpn_packet_t pkt;
+	int x, l = sizeof(x);
+	char *hostname;
+	sockaddr_t from;
+	socklen_t fromlen = sizeof(from);
+	node_t *n;
+
+	cp();
+
+	if(getsockopt(sock, SOL_SOCKET, SO_ERROR, &x, &l) < 0) {
+		syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%s"),
+			   __FILE__, __LINE__, sock, strerror(errno));
+		cp_trace();
+		exit(1);
+	}
+
+	if(x) {
+		syslog(LOG_ERR, _("Incoming data socket error: %s"), strerror(x));
+		return;
+	}
+
+	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) {
+		hostname = sockaddr2hostname(&from);
+		syslog(LOG_WARNING, _("Received UDP packet from unknown source %s"),
+			   hostname);
+		free(hostname);
+		return;
+	}
+
+	if(n->connection)
+		n->connection->last_ping_time = now;
+
+	receive_udppacket(n, &pkt);
 }