Wireshark · Wireshark-users: Re: [Wireshark-users] Wireshark 1.0.13 and Lua (post)dissectors

[Oleg <oleg.khr@xxxxxxxxx>]

Is anybody using Lua for post dissectors?

Is it the right mailing list to send the question?

Thanks,

Oleg

On Mon, May 17, 2010 at 5:52 PM, Oleg <oleg.khr@xxxxxxxxx> wrote:

I am trying to implement postdissectors using Lua and Wireshark 1.0.13.

And even a basic example doesn't work for me.

Field extractor always returns nil:

udp_len_f = Field.new("udp.length")

test_proto = Proto ("test", "Test Protocol")

function test_proto.dissector (buffer, pinfo, tree)

   pinfo.cols.info = "Test"

   local udp_len = udp_len_f()

   if udp_len then

     pinfo.cols.info = "UDP length: " .. udp_len.value

else

     pinfo.cols.info = "UDP length: nil" 

   end

end

register_postdissector(test_proto)

Such postdissector always produces "UDP length: nil" for all UDP messages.

It works fine on the newer versions of Wireshark but I have to use 1.0.x series for my task.

Was anyone able to get it working with 1.0.13?

Thanks,

Oleg