Hi, as far as I remember the IP RFC, the smallest IP fragment has a length of 21 octets. Unfortunately the IP code of Linux (2.4.17) drops all packets which have a payload of less than 8 octets (see the code fragment below). Yesterday we were running some tests with very small packets and it took some time until we had figured out why our receive handler did not see any packet. Any comments? Morten the code which discards our packets (File ip_input.c; function int ip_local_deliver_finish(struct sk_buff *skb) 227 /* Pull out additionl 8 bytes to save some space in protocols. */ 228 if (!pskb_may_pull(skb, ihl+8)) 229 goto out; 230 __skb_pull(skb, ihl); -- ------------------------------------------------------------------------ Morten Schläger Tel.: ++49 (030) 314-23834 Technical University Berlin Fax.: ++49 (030) 314-23818 Telecommunication Networks Group (TKN) morten@ee.TU-Berlin.DE Sekr. FT 5-2/Einsteinufer 25 10587 Berlin, Germany - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
