Re: Using Lua Field Extractors

[izo <marcin.izo () gmail com>]

Hi,
Field extractor returns table of messges if there's more then one,
but you have to assign table to your variable rather than first
element so it should look something like:


local isup_messages  = { isup_extractor() }

for i, isup_single_msg in ipairs(isup_messages)
do
   -- process your single isup message here
end



regards
m





On Sun, Nov 22, 2009 at 12:22 AM, Markus Pilz <markus () pilz name> wrote:
> Hi all,
>
> I am using a Lua to obtain data from an SCTP stream. In this scenario, a
> single SCTP packet can contain the same field type multiple times.
> Although Wireshark displays this correctly, I don't know how to access
> these fields via Lua.
>
> Example packet figure:
> ...[SCTP [M3UA [ ISUP ] ] [ M3UA [ ISUP 2 ] ] ]...
>
> A field extractor only gets the info from the first M3UA/ISUP part. Even
> if the listener is set to M3UA or ISUP packets (local tap =
> Listener.new( "isup" )).
>
> Is there a way to extract a list of all fields (from the same type) via Lua?
>
> Best Regards
> Markus
>
> P.S.: This is maybe is Wireshark+Lua newbie question.
>
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