[Click] packet data compression?

[Robert Sombrutzki]

Hi,
i started to implement such an element some weeks ago. It uses LZW for 
compression. In the archive, there is a element called packetcompression and 
a click-file for testing. 
I agree with Bart, that in-place compression is faster than my current 
implementation, but the problem is, that the lzw-compression can result in 
bigger packets and so you would overwrite the data you want to compress.
Maybe, it is possible to seperate the comression-part of the click-element in 
an extra element (like a plugin), so that it can be replace by other method 
(bzip2,....).
Please let me know if you have a implementation of other compression-methods, 
which can be used for click-element. And also if you have an in-place 
compression !
Oh, and send an email, if something is not working.

Best regards,
Robert

On Freitag, 6. November 2009, Bart Braem wrote:
> Hi,
>
> On 02 Nov 2009, at 15:09, Alastair McKinley wrote:
> > Does anyone have any experience with compressing packet data from
> > within or
> > with click elements?
> > I had a quick search and didn't see anything, and just wanted to ask
> > before
> > possibly re-inventing the wheel.
> > Is this a feature that other people might be interested in?
>
> I do not think much elements exist that perform compression.
> It will not be easy, as you will want to perform in-place compression
> to avoid expensive payload copies. But I guess with the right take
> calls on the packet you will get there.
> It would be interesting to see an implementation of this, especially
> an efficient one.
>
> Best regards,
> Bart


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