--- nfqnl_test.original.c	2009-02-17 20:27:28.000000000 +0100
+++ nfqnl_test.c	2010-11-05 11:24:26.000000000 +0100
@@ -8,6 +8,8 @@
 
 #include <libnetfilter_queue/libnetfilter_queue.h>
 
+#include <errno.h>
+
 /* returns packet id */
 static u_int32_t print_pkt (struct nfq_data *tb)
 {
@@ -115,9 +117,21 @@
 
 	fd = nfq_fd(h);
 
-	while ((rv = recv(fd, buf, sizeof(buf), 0)) && rv >= 0) {
-		printf("pkt received\n");
-		nfq_handle_packet(h, buf, rv);
+	for (;;) {
+		if ((rv = recv(fd, buf, sizeof(buf), 0)) >= 0) {
+			printf("pkt received\n");
+			nfq_handle_packet(h, buf, rv);
+			continue;
+		}
+		/* if the computer is slower than the network the buffer
+		* may fill up. Depending on the application, this error
+		* may be ignored */		
+		if (errno == ENOBUFS) {
+			printf("pkt lost!!\n");
+			continue;
+		}
+		printf("recv failed: errno=%d (%s)\n",
+			errno, strerror(errno));
 	}
 
 	printf("unbinding from queue 0\n");