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From: Jung-uk Kim <jkim@FreeBSD.org>
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Date: Thu, 15 Feb 2007 16:55:51 -0500
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Subject: Re: [PATCH] BPF to support directions and more
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On Wednesday 14 February 2007 06:05 pm, Jung-uk Kim wrote:
> I was playing with some BPF ideas for few days and I added two new
> features.  SEESENT flag is extended to see only outgoing packets,
> which is analogous to libpcap's PCAP_D_OUT direction.  Thus SEESENT
> is now called DIRECTION.  Second feature is feedback mode (sort of
> simulated hardware loopback), i.e., when packets are injected, you
> can feed them back as if they are coming from the wire.  You can
> debug link layer protocols easily with this without second machine,
> network controller, or loopback plug.  It's only tested with
> Ethernet, though.  All necessary patches (including libpcap
> modification) are here:
>
> http://people.freebsd.org/~jkim/bpf_feedback.diff

I have received some positive feedbacks and comments.  So, I made some 
adjustments/corrections to reflect them:

http://people.freebsd.org/~jkim/bpf_feedback-20070215.diff

Thanks,

Jung-uk Kim