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Wireshark-dev: Re: [Wireshark-dev] Lua Dissector <lua fake item>

From: Hadriel Kaplan <hadriel.kaplan@xxxxxxxxxx>
Date: Thu, 3 Apr 2014 23:52:25 -0400
Do you have the “Display hidden protocol items” enabled in your Protocol preferences for some reason? That would probably cause that “fake lua item” to be displayed.

-hadriel


On Apr 3, 2014, at 11:46 PM, Hadriel Kaplan <hadriel.kaplan@xxxxxxxxxx> wrote:

> 
> Doesn’t happen for me, on Windows-XP (sorry I don’t have a newer windows to try it on right now - my main machine’s a Mac).
> 
> If you can’t show your real script, can you try downloading the “dissector.lua" one on the script examples wiki page, along with the "dns_port.pcap" file, and try those to see if you see the same thing with that?
> 
> The examples page is here:
> 
> http://wiki.wireshark.org/Lua/Examples
> 
> ...and the first section of that page is labeled "A dissector tutorial script", with the download link for "dissector.lua" and a few paragraphs later the link for "dns_port.pcap”.
> 
> -hadriel
> 
> On Apr 3, 2014, at 11:04 PM, Matthew Parlane <parlane@xxxxxxxxx> wrote:
> 
>> Hey everyone,
>> 
>> I grabbed the latest Wireshark-win64-1.11.3-2224-gdf52f81.exe install.
>> 
>> Made a lua script for decoding a simple protocol header and I am getting:
>> 
>> User Datagram Protocol
>> <lua fake item>
>> Blah Protocol
>> 
>> Basically my lua is
>> 
>> 
>>    local p_blah = Proto("blah","Blah Protocol");
>>    blah.fields = {... }
>>    function p_blah.dissector(buf, pinfo, root)
>>      local t = root:add(p_blah, buf(0,BLAH_HEADER_SIZE))
>>      t:add(f_item1, buf(0,4))
>>      -- root:set_text("What?")
>>    end
>> 
>> Now if I do the root:set_text("What?"), it changes from <lua fake item> to <Text item>
>> 
>> 
>> User Datagram Protocol
>> <Text item>
>> Blah Protocol
>> 
>> 
>> The Blah protocol decodes perfectly, so that's fine. Just curious how to correctly add the nodes so that it doesn't give this extra row of fake lua ?
>> 
>> 
>> p.s. Sorry on light details, I can't share the specs.
>> 
>> Cheers,
>> Matthew Parlane
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