In message <Pine.NEB.4.21.0106051654390.1026-100000@wojtek.3miasto.net>, wojtek
@wojtek.3miasto.net writes:
>>  > 
>>  > doesn't ethernet has it's own layer-2 checksumming?
>> 
>> Sure, but there are plenty of cheap hubs/switches that screw it up in
>> a way that makes a corrupted/packet appear OK.
>
>hmm.. i did not know that.. anyway when one know/tested he has good
>hardware it could be usable.
>if hardware checksumming is implemented it should be easy by treating this
>card as hardware-checksum capable but with null function
>
>
See

@inproceedings{ stone00when,
    author = "Jonathan Stone and Craig Partridge",
    title = "When the {CRC} and {TCP} checksum disagree",
    booktitle = "{SIGCOMM}",
    pages = "309-319",
    year = "2000",
    url = "citeseer.nj.nec.com/stone00when.html"
}

		--Steve Bellovin, http://www.research.att.com/~smb