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Date:      Tue, 17 Apr 2007 22:00:58 +1000
From:      Peter Jeremy <peterjeremy@optushome.com.au>
To:        Alan Garfield <alan@fromorbit.com>
Cc:        freebsd-net@freebsd.org
Subject:   Re: fake MAC addresses and ARP
Message-ID:  <20070417120058.GN1624@turion.vk2pj.dyndns.org>
In-Reply-To: <1176781003.6367.12.camel@hiro.auspc.com.au>
References:  <1176781003.6367.12.camel@hiro.auspc.com.au>

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On 2007-Apr-17 13:36:43 +1000, Alan Garfield <alan@fromorbit.com> wrote:
>I've got a little driver that communicates via a small buffer on the
>motherboard of a Sun Fire V20z to a built-in "service processor" which
>is running Linux. The driver on both sides makes the buffer look like a
>Ethernet interface.

I'd be interested in using this.

>arplookup 169.254.101.2 failed: could not allocate llinfo
>arpresolve: can't allocate route for 169.254.101.2
>
>The Linux driver I'm porting simply grabbed any outgoing arp requests,
>made up an appropriate response with the pre-defined fake MAC's, put it
>into the input queue and ate the request packet.

A quick-and-dirty work-around would seem to be
  arp -s 169.254.101.2 Fa:ke:ma:cA:dd:re:ss

Otherwise, I think you would need to fiddle with the transmit packet
code in your driver.

--=20
Peter Jeremy

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