hme(4) broken on non-sparc64 systems in -current

Scott Long scottl at samsco.org
Tue Mar 21 06:20:28 UTC 2006


Joerg Wunsch wrote:
> As Pyun YongHyeon wrote:
> 
> 
>>How about backing out rev. 1.46(if_hme.c)?
> 
> 
>>For the same patch sent to bard at OpenBSD I got a positive report
>>so it's strange to me though.(brad at OpenBSD reported Rx checksum
>>offload breakage on little endian systems.)
> 
> 
> Yes, backing that out helps.  I'm not sure what this change was trying
> to fix.  I've noticed before that tools like ethereal reported the
> checksum as invalid but the traffic itself was unaffected.  Anyway, as
> it was now, the traffic was blocked, so perhaps there's more than one
> spot where this needs to be fixed?
> 
> I'll look a bit further into it tonight.  Thanks!
> 

When tx checksum offloading is enabled, you'll always get checksum 
errors when capturing the local end of the transmission.  That expected,
since the checksum never gets computed until long after the bpf tap has
captured it.

Scott



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