https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=7759
Chris Maynard <christopher.maynard@xxxxxxxxx> changed:
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--- Comment #2 from Chris Maynard <christopher.maynard@xxxxxxxxx> 2012-09-26 08:21:51 PDT ---
Comment on attachment 9233
--> https://bugs.wireshark.org/bugzilla/attachment.cgi?id=9233
patch for epan/dissectors/packet-ip.c
An IP checksum of 0 is bad and should be marked as such. The "problem" is that
checksum offloading is going on and so Wireshark gets a copy of the outgoing
packets before the NIC calculates the checksum.
As mentioned in the user guide, you can either disable checksum offloading in
the network driver or you can disable checksum validation in Wireshark. Refer
to section 7.8.2 of the user guide for more details:
http://www.wireshark.org/docs/wsug_html_chunked/ChAdvChecksums.html#id36172093
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