NetBSD doesn't even have this capability, yet.

In some email I received from Reinoud, sie wrote:
> Hi,
> 
> Currently i am away from home and cant reach a netbsd with up to date
> source now.
> However, i wonder if netbsd does such a checks a Darren refered to below?
> Anyone knows?
> Bye,
> 
> Reinoud.
> 
> 
> ---------- Forwarded message ----------
> Date: Tue, 1 Aug 2000 07:11:36 +1000 (EST)
> From: Darren Reed <avalon@coombs.anu.edu.au>
> To: Siobhan Patricia Lynch <trish@bsdunix.net>
> Cc: freebsd-security@FreeBSD.ORG
> Subject: Bridge filtering can cause crash
> 
> 
> Just in case anyone is wondering, if you look at the bridge_filter()
> routine in /sys/net/if_bridg.c for OpenBSD, you will see that it does
> a number of sanity checks on the packet - none of which FreeBSD does -
> before passing it to the filtering routine(s).
> 
> 
> 
>