Re: accessing multiple occurrences of the same field with lua

[Tony Trinh <tony19 () gmail com>]

On Wed, Mar 6, 2013 at 7:02 AM, Cristian Constantin <
const.crist () googlemail com> wrote:

> hi!
>
> some protocols are structured in chunks which have the same structure
> but differ in content.
>
> examples:
>
> - diameter (avps)
> - sigtran suite (parameters)
> - sctp (data chunks)
>
> how to access with lua a certain field in such a chunk? NOT necessarly
> the first.
>
> for example, using:
>
> local param_len = Field.new("m3ua.parameter_length")
>
> and later on in the tap.packet():
>
> local len = param_len()
>
> will get me only the length of whatever is the first m3ua parameter. how
> to get the length of the second, third aso??
Try this Lua:

function tap.packet()
  local lengths = { param_len() }
  for i,len in ipairs( lengths ) do
      print( '['..i..']', len )
  end
end

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