--- ping_common.c	2006-12-01 12:58:33.000000000 +0100
+++ ping_common.c	2006-12-01 12:59:59.000000000 +0100
@@ -187,6 +187,13 @@
 			fprintf(stderr, "ping: illegal negative packet size %d.\n", datalen);
 			exit(2);
 		}
+		if (datalen > 0xFFFF - 8 ) {
+			if (uid || datalen > 0xFFFF ) {
+				fprintf(stderr, "Error: packet size %d is too large. Maximim is %d\n", datalen, 0xFFFF - 8);
+				exit(2);
+			}
+			fprintf(stderr, "WARNING: packet size %d is too large. Maximim is %d\n", datalen, 0xFFFF - 8 );
+		}
 		break;
 	case 'v':
 		options |= F_VERBOSE;