This is a Lua script Wireshark dissector for the AppleTalk Update-Based Routing Protocol, or AURP. AURP is a routing and tunneling protocol that operates over UDP port 387. Currently, this only decodes the routing-related packets described in "AppleTalk Update-Based Routing Protocol - Enhanced AppleTalk Routing". It will also delegate tunneled data (packet type 2) to the Datagram Delivery Protocol (DDP) dissector so you can see what's inside.
All AURP packets should be decoded, but I don't have dumps that exercise every part of the protocol so it is quite likely there are errors. Also my brain is fried from trying to interpret diagrams, so maybe even the stuff I have tested is wrong.
Copy aurp-dissector.lua to your Wireshark plugins directory. This is
~/.local/lib/wireshark/plugins on Unix-like systems and
%APPDATA%\Wireshark\plugins on Windows. Restart Wireshark or press
Cmd/Ctrl-Shift-L to reload Lua scripts.
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If you can figure out what broke, send me a patch. If you can't figure out what broke, send me a packet dump. If you can't figure out either, I can't help you.