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Date:      Fri, 26 Mar 1999 10:19:22 -0800 (PST)
From:      Archie Cobbs <archie@whistle.com>
To:        cmsedore@maxwell.syr.edu (Christopher Sedore)
Cc:        freebsd-net@FreeBSD.ORG
Subject:   Re: bpf bug?
Message-ID:  <199903261819.KAA86181@bubba.whistle.com>
In-Reply-To: <262C3DA9BE0CD211971700A0C9B413A1CBEF@exchange.maxwell.syr.edu> from Christopher Sedore at "Mar 26, 99 11:17:17 am"

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Christopher Sedore writes:
> I noticed today that when sending a packet through the bpf interface,
> the kernel silently resets the ethernet source MAC to the MAC of the
> network card doing the send.  My impression was that bpf writes should
> go direct to the interface without any edits in the kernel--am I wrong
> on this?

My opinion on this is that yes it's a bug. However, it's not so
easy to fix, because other parts of the kernel surely rely on
this behavior. To fix it would probably require a new argument
to if_output() (or whatever it's called) or perhaps a new mbuf flag.
I suggest you file a PR and see what comes back :-)

-Archie

___________________________________________________________________________
Archie Cobbs   *   Whistle Communications, Inc.  *   http://www.whistle.com


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