Wireshark-bugs: [Wireshark-bugs] [Bug 11971] New: 6LoWPAN IPHC traffic class not decompressed co

Date: Thu, 07 Jan 2016 11:11:07 +0000
Bug ID 11971
Summary 6LoWPAN IPHC traffic class not decompressed correctly
Product Wireshark
Version Git
Hardware x86
OS Windows 7
Status CONFIRMED
Severity Major
Priority Low
Component Dissection engine (libwireshark)
Assignee [email protected]
Reporter [email protected]

Build Information:
Paste the COMPLETE build information from "Help->About Wireshark", "wireshark
-v", or "tshark -v".
--
The 6LoWPAN dissector for IPHC correctly dissects the header, showing the
traffic class and flow label fields accurately.

(Although I find it a little weird that it shows the traffic class bits laid
out in their IPv6 form, rather than their layout in the actual IPHC header).

However, when it builds the decompressed IPv6 packet, it doesn't perform the
shifting operations correctly if running on a little-endian system. As a
result, in the IPv6 dissection, some of the traffic class ends up in the flow
label.

Patch to follow.


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