From owner-freebsd-net  Thu Aug  9  9:39:39 2001
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From: Bill Fenner <fenner@research.att.com>
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To: jon@freebsd.org
Subject: BPF and broadcasts (was Re: forwarding broadcast)
Cc: luigi@info.iet.unipi.it, net@freebsd.org
References:  <20010809113638.A9519@enterprise.spock.org> <200108091542.RAA06984@info.iet.unipi.it> <20010809120221.D9519@enterprise.spock.org>
Date: Thu, 9 Aug 2001 09:39:34 -0700
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>One more thing, -CURRENT will stuff two copies of any broadcast into bpf, 
>it seems.

This is because if_simloop() is broken.  I proposed to un-break it
a while ago and never got any feedback.

http://www.FreeBSD.org/cgi/getmsg.cgi?fetch=198310+201485+/usr/local/www/db/text/2001/freebsd-net/20010429.freebsd-net

http://people.freebsd.org/~fenner/if_simloop_callers.html

I've been meaning to just commit my patch, even though it leaves
the callers whose BPF answers are "YES/NO" in that table in the
lurch -- but they're in the lurch anyway because if_simloop uses
DLT_NULL and that's almost never right.

  Bill

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