Wireshark-dev: [Wireshark-dev] How does a LUA Field Extractor work?
From: Paul Offord <[email protected]>
Date: Wed, 7 Sep 2016 07:45:58 +0000



I’m having problems accessing data in a postdissector that I am writing.  I’m porting the postdissector from LUA to C.  I need to understand how the LUA Field Extractor works.  In the LUA script I can do the following:


  -- initialisation code

 tcp_stream_f = Field.new("tcp.stream")



  -- in the dissector

  this_stream = tcp_stream_f()

  tcp_stream = this_stream.value


How does this work?  How does the LUA code gain access to the tcp.stream value?


Thanks and regards…Paul


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