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From: Jung-uk Kim <jkim@FreeBSD.org>
To: Darren Reed <darrenr@hub.freebsd.org>
Date: Tue, 3 Jan 2006 12:13:00 -0500
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Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: Re: cvs commit: src/sys/net bpf_filter.c
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On Saturday 31 December 2005 09:50 am, Darren Reed wrote:
> On Thu, Dec 08, 2005 at 12:05:03AM +0000, Jung-uk Kim wrote:
> > jkim        2005-12-08 00:05:03 UTC
> >
> >   FreeBSD src repository
> >
> >   Modified files:
> >     sys/net              bpf_filter.c
> >   Log:
> >   Do not accept an empty bpf program.
>
> You need to make one of two follow up changes here:
>
> 1) explicitly allow 0-length programs
>
> 2) fix bpf_filter (see the first check and its comments for "return
> -1")
>
> Personally I'd prefer to see (1) because it allows you
> to "set" a BPF program and measure the performance impact
> of the BPF code on networking without having to worry
> about the cost of executing the BPF program itself.

Hmm...  You're right.  I will fix that.

Thanks,

Jung-uk Kim

> Darren