Wireshark-bugs: [Wireshark-bugs] [Bug 8629] bad tcp checksum not detected
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Fri, 10 May 2013 17:43:33 +0000

Comment # 13 on bug 8629 from 
I don't know enough about TCO and all of its implementations, but if TCO is
enabled, is the TCP checksum that Wireshark sees always 0x0000?  I doesn't seem
so, based on the current comment in the Wireshark code.  Assuming that it's not
always going to be 0x0000, then I still think it could be useful to provide a
way to allow reassembly to be attempted even if checksums are computed by
Wireshark to be invalid.  I don't think that disabling TCO would always be an
option.

I guess we can leave that as a separate enhancement if anyone really sees value
in implementing it ... along with possibly adding tcp.checksum_computed, if
there's value in doing that too.  Regarding the latter, if deemed useful, it
might also be useful to add ip.checksum_computed, udp.checksum_computed, ...

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