Re: fake MAC addresses and ARP

On 2007-Apr-17 13:36:43 +1000, Alan Garfield <alan@xxxxxxxxxxxxx> 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.

--
Peter Jeremy

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