Ethereal-users: RE: [Ethereal-users] incorrect tcp checksums
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From: Richard Urwin <RUrwin@xxxxxxxxxxxxxx>
Date: Mon, 14 Oct 2002 09:31:01 +0100
Before someone else tells us... You can already display-filter on bad checksums, both for IP and TCP. I don't imagine that capture filtering will ever be up to the job. The packet summary idea is good, though. -- Richard Urwin, Private "No 9000 series computer has ever made a mitsake or corrubiteddatatato." -----Original Message----- From: Richard Urwin [mailto:RUrwin@xxxxxxxxxxxxxx] Sent: 14 October 2002 09:25 To: Richard Urwin; 'Davidson, Stuart'; ethereal-users@xxxxxxxxxxxx Subject: RE: [Ethereal-users] incorrect tcp checksums > I have also seen this (w2000sp2) and it can be quite annoying since TCP-desegmentation > fails to work for packets with TCP-checksum error (but fortunately this check can be > turned off in Ethereal). Also there was IP-checksum errors. Yes, I get them too. >> I assumed this was due to some lower level >> software adding the correct checksums after Ethereal has grabbed the packet. > This could make sense but then it would be nice if Ethereal could handle this > in an "intuitive way", e.g. by "writing the correct checksum" and add a "packet note" > about that these checksums were made by Ethereal. > This could be enabled specific for each platform. > Btw. It could be nice if checksum errors (or other errors) also could be shown in the > high level packet view (to get attention) - and if it was possible to search/filter for > erronous packets. > Hmmm - I know I should contribute with some code instead of just writing mails ;-) It sounds like a two-line fix to me. It would make an easy introduction to Ethereal for somebody... Not me, I'm unable to build Ethereal at the moment; see elsewhere on the dev list. -- Richard Urwin, Private "No 9000 series computer has ever made a mitsake or corrubiteddatatato." ________________________________________________________________________ This email has been scanned for all viruses by the MessageLabs SkyScan service. For more information on a proactive anti-virus service working around the clock, around the globe, visit http://www.messagelabs.com ________________________________________________________________________ _______________________________________________ Ethereal-users mailing list Ethereal-users@xxxxxxxxxxxx http://www.ethereal.com/mailman/listinfo/ethereal-users ________________________________________________________________________ This email has been scanned for all viruses by the MessageLabs SkyScan service. For more information on a proactive anti-virus service working around the clock, around the globe, visit http://www.messagelabs.com ________________________________________________________________________
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