I use the wireshark. But then this does not happen for all packets and so I don't know if it be a problem with the Wireshark here. In anycase the communication stops and I can see retransmissions occuring for the same packet, but every time this one gets the checksum error. I don't see any chance of recovery either, other than doing a shutdown of the machine and bringing it back online.
- Sourath On 1/24/08, Frédéric BERNON <[EMAIL PROTECTED]> wrote: > > Be careful with some network sniffer, like ethereal/wireshark: sometimes, > if the capture is done from a pc with checksum offload features, you could > see checksums errors which are not real. How do you do your capture ? > > ----- Original Message ----- > *From:* Sourath Roy <[EMAIL PROTECTED]> > *To:* [email protected] > *Sent:* Wednesday, January 23, 2008 7:26 PM > *Subject:* [lwip-users] Re: Checksum calculations > > Hello! > I am porting some network applications from Linux to lwIP stack. So far > the progress has been good, but while some stress tests I often see checksum > errors being reported by the network sniffer. The ethernet chip does not > have any checksum generation support, and so we rely on the software > algorithms available inside lwIP library. Have you guys seen such a problem > before? Endianness on the system is little-endian, but I believe the > algorithm already takes care of that. > > Also I don't quite follow the need for check on len being odd and swapping > the acc inside inet_chksum_pseudo (and similar) functions. I think that's > already taken care off in lwip_standard_chksum functions. Any thoughts on > this? > > Regards, > Sourath > > ------------------------------ > > _______________________________________________ > lwip-users mailing list > [email protected] > http://lists.nongnu.org/mailman/listinfo/lwip-users > > > _______________________________________________ > lwip-users mailing list > [email protected] > http://lists.nongnu.org/mailman/listinfo/lwip-users >
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