[En-Nut-Discussion] ip filtering

[Matthew Franz]

This idea of a lightweight portable API for RTOS packet filtering (just incoming seems adequate) is something I've also been thinking about 
lately.

Linux kernel 2.0.x and the userspace (ipfwadm) filtering would be the simplist (vs. 2.2. or 2.4) and double-checking that eCOS doesn't already
have something similar.

I'm pretty new to Ethernut/NutOS but would be glad to help out.

- mdf

> The IP filtering in Linux is very interesting. It is based in 3 basic 
> chains, one for input, one for forward and one for output (others may be 
> added).
> 
> I think it will take much space to implement it. Maybe a simple solution 
> like the one provided by the tcp-wrappers should be very simple to 
> implement. It is based in a couple of files: hosts.allow and hosts.deny.
> 
> Hugo.
> 
> Harald Kipp wrote:
> 
> > I've been just asking in case you got any source. I can
> > also try check BSD for filtering options.
> >
> > The callback itself is really simple. But some kind of API
> > call is required to enable/disable it.
> >
> > As an alternative, the libnutnet may provide a default
> > callback, which could be overridden by the application.
> >
> > Harald
> >
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> >
> 
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-- 
| Matthew Franz                              mdfranz at io.com |
|              http://www.io.com/~mdfranz                   |