[Click] Ethernet MAC address and click...

[Nicholas Weaver]

On common hardware (particularly intel ethernet chipsets), in user
mode (FreeBSD):

Is it possible for ToDevice to preserve the from MAC address in the
header of packets passed to it?  Or am I stuck with the observed
behavior: the from MAC is assigned to that associated with the
ethernet card?

The simple queue:

FromDevice(em0) -> Queue -> ToDevice(em1);


TCPDump em0 side:
14:14:58.900668 0:d0:bb:fa:86:19 ff:ff:ff:ff:ff:ff 0806 60: 
		arp who-has 192.150.187.20 tell 192.150.187.109


TCPDump em1 side (verified at a 2nd machine attached to em1's switch):
14:14:58.900710 0:e:c:69:f:7e ff:ff:ff:ff:ff:ff 0806 60: 
		arp who-has 192.150.187.20 tell 192.150.187.109

(em1 outputs gain em1's MAC address)


Barring that, does anyone have a bootp/dhcp proxy code in Click?  

Many thanks.

-- 
Nicholas C. Weaver                               nweaver at icsi.berkeley.edu
     This message has been ROT-13 encrypted twice for higher security.