I'm writing a Lua dissector for Wireshark for a complex protocol. The protocol has a message header that includes a msgType field. I want to write a subdissector for each message type, with each subdissector stored in a separate source file.
My top-level script is general.lua which dissects the message header and creates the dissector table:
DissectorTable.new("myProtocol.Message")
dofile(DATA_DIR.."cplane.lua")
cplane.lua is a subdissector for message type 'cplane' and includes the code:
my_dissector_table = DissectorTable.get("myProtocol.Message")
my_dissector_table:add(0x02, myProtocol_cplane_proto)
Both scripts are in the same subdirectory of Wireshark's plugins directory.
When I load the plugins I get error:
Lua: Error during loading:
[string "C:\Program Files (x86)\Wireshark\plugins\2.4...."]:9: bad argument
#1 to 'get' (DissectorTable_get: no such dissector_table)
Lua: Error during loading:
[string "C:\Program Files (x86)\Wireshark\plugins\2.4...."]:170: bad
argument #1 to 'dofile' (dofile: file does not exist)
How can I fix this? Is the problem to do with the loading order of the scripts? Is the dofile() call necessary?