Wireshark-bugs: [Wireshark-bugs] [Bug 10687] Feature Request: Bad Checksum 0x00000000

Date: Thu, 29 Jan 2015 21:23:16 +0000

Comment # 17 on bug 10687 from
(In reply to Chris Maynard from comment #16)
> (In reply to Michael Tüxen from comment #15)
> > For TCP a zero checksum is not allowed (which is the same for UDP when enabled).
> 
> A TCP zero checksum is allowed; a TCP checksum of 0xFFFF is the problematic
> value and is probably why Wireshark flags it as an Expert Info.  See
> http://tools.ietf.org/html/rfc1624.
Ahh, I was wrong. I thought UDP and TCP handle it the same. Thanks for pointing
that out!

Best regards
Michael
> 
> As for a UDP 0 checksum, refer to the UDP-relevant part of comment 7.


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