>>>>> "|" == Jonathan Stone <jonathan@DSG.Stanford.EDU> writes:

 |> I think that would mean adding:
 |> 	* ip_input checking for a dest addr of INADDR_ANY, and
 |> 	  dropping packets that aren't IPPROTO_UDP;
 |> 	* udp_input checking for destaddr of INADDR_ANY,
 |> 	   and silently dropping such packets if the destination
 |> 	   port isn't the bootp client port.

 |> 	* I assume the in-kernel bootp client is already checking the xid,

Processing IP address which is not ifconfig'ed to interface is useful
for other purposes(such as transparent proxy). I don't like such bootp 
specialized implementation.

To achieve such filtering only for bootp, bpf may be appropriate, i
think.
--
Koji Imada - je4owb/2
koji@math.human.nagoya-u.ac.jp