I don't think the UDP checksum is invalid. It maybe come from "Checksum offloading". http://www.wireshark.org/docs/wsug_html_chunked/ChAdvChecksums.html
Subject: Re: [lwip-users] UDP packet sending problem From: patrick Deflandre > I am wondering too why my linux station send bad checksum on a few ip > frame. I don't know if it change something on my problem, but I should > investigate on that problem too. > > Nevertheless, as the udp frame seem to be received by the target, I > don't think this is the problem for sending an udp frame from the > embedded lwIP to my linux station. > Does anybody knows about linux bad checksum of ip frame ? > > 2009/6/26 Bill Auerbach <[email protected]> > > > Could it be the checksum error? > > > > > > > > User Datagram Protocol, Src Port: 41486 (41486), Dst Port: tftp (69) > > Source port: 41486 (41486) > > Destination port: tftp (69) > > Length: 13 > > Checksum: 0x3333 [incorrect, should be 0x419b (maybe caused by "UDP > > checksum offload"?)] > > [Good Checksum: False] > > [Bad Checksum: True] > > Trivial File Transfer Protocol > > Opcode: Unknown (28777) > > Data (3 bytes) _______________________________________________ lwip-users mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/lwip-users
