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

Hi,

 

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


______________________________________________________________________

This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system.

Any views or opinions expressed are solely those of the author and do not necessarily represent those of Advance Seven Ltd. E-mail transmission cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept liability for any errors or omissions in the contents of this message, which arise as a result of e-mail transmission.

Advance Seven Ltd. Registered in England & Wales numbered 2373877 at Endeavour House, Coopers End Lane, Stansted, Essex CM24 1SJ

______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please visit http://www.symanteccloud.com
______________________________________________________________________