Dearborn Group Technology has released under GPL this plugin
for Wireshark. It decodes the protocol used by their Gryphon
and BEACON automotive network tool.

The plugin decodes the communication protocol, but not any
vehicle network messages.

Dearborn Group Technology can be found at https://www.dgtech.com
The author is Steve Limkemann <stevelim@dgtech.com>,
with fixes and updates by Mark Ciechanowski
<mciechanowski@dgtech.com>