X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fnet_packet.c;h=a989b09f20733aaf7244bea77073109ddb49469c;hp=8f47f23f2fabb718abca875b20aeddb691dcff20;hb=288d956728ab4d4aabe9bc59b87991420dbda151;hpb=72bdc05cb7e246e56ed21a25256d441c45fccca8

diff --git a/src/net_packet.c b/src/net_packet.c
index 8f47f23f..a989b09f 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 1.1.2.39 2003/08/22 11:18:42 guus Exp $
+    $Id: net_packet.c,v 1.1.2.41 2003/09/23 20:59:01 guus Exp $
 */
 
 #include "system.h"
@@ -118,6 +118,14 @@ static void receive_udppacket(node_t *n, vpn_packet_t *inpkt)
 
 	cp();
 
+	/* Check packet length */
+
+	if(inpkt->len < sizeof(inpkt->seqno) + myself->maclength) {
+		ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Got too short packet from %s (%s)"),
+					n->name, n->hostname);
+		return;
+	}
+
 	/* Check the message authentication code */
 
 	if(myself->digest && myself->maclength) {
@@ -189,6 +197,9 @@ static void receive_udppacket(node_t *n, vpn_packet_t *inpkt)
 		inpkt = outpkt;
 	}
 
+	if(n->connection)
+		n->connection->last_ping_time = now;
+
 	receive_packet(n, inpkt);
 }
 
@@ -367,7 +378,7 @@ void broadcast_packet(const node_t *from, vpn_packet_t *packet)
 			   packet->len, from->name, from->hostname);
 
 	for(node = connection_tree->head; node; node = node->next) {
-		c = (connection_t *) node->data;
+		c = node->data;
 
 		if(c->status.active && c->status.mst && c != from->nexthop->connection)
 			send_packet(c->node, packet);
@@ -384,7 +395,7 @@ void flush_queue(node_t *n)
 
 	for(node = n->queue->head; node; node = next) {
 		next = node->next;
-		send_udppacket(n, (vpn_packet_t *) node->data);
+		send_udppacket(n, node->data);
 		list_delete_node(n->queue, node);
 	}
 }
@@ -401,7 +412,7 @@ void handle_incoming_vpn_data(int sock)
 
 	pkt.len = recvfrom(sock, (char *) &pkt.seqno, MAXSIZE, 0, &from.sa, &fromlen);
 
-	if(pkt.len <= 0) {
+	if(pkt.len < 0) {
 		logger(LOG_ERR, _("Receiving packet failed: %s"), strerror(errno));
 		return;
 	}
@@ -418,8 +429,5 @@ void handle_incoming_vpn_data(int sock)
 		return;
 	}
 
-	if(n->connection)
-		n->connection->last_ping_time = now;
-
 	receive_udppacket(n, &pkt);
 }