Wireshark-bugs: [Wireshark-bugs] [Bug 12366] New: J1939 frame without data = malformed packet ?

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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Mon, 25 Apr 2016 11:40:19 +0000
Bug ID 12366
Summary J1939 frame without data = "" packet ?
Product Wireshark
Version 2.0.2
Hardware x86
OS Ubuntu
Status UNCONFIRMED
Severity Major
Priority Low
Component Dissection engine (libwireshark)
Assignee [email protected]
Reporter [email protected] 

Created attachment 14506 [details]
J1939 without datas

Build Information:
Paste the COMPLETE build information from "Help->About Wireshark", "wireshark
-v", or "tshark -v".
--
Hello,

I'm not sure this is a bug:
apparently sending a J1939 frame without data is recognized as "malformed".
I read several documents for J1939 especially "A Comprehensible Guide to J1939"
(author Wilfried Voss).

The data field is supposed to be optional...

I put a message on his forum :
https://ask.wireshark.org/questions/51641/can-bus-j1939-frames-without-datas-wrong-interpreted
then peoples adviced me to report this potential bug here.

please, if you attempt to fix this keep me informed.
Thank you in advance.
Olivier.

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