#! /bin/sh -e

# busybox's dc doesn't support i :<
# Its awk does support 0xa0 as an int, but gawk doesn't.  This only works on busybox.
lastd=$(awk -F ':' '{for (i=1; i<NF; i++) {q = xor(q, "0x" $i);} print (q<2?2:q);}' /sys/class/net/eth0/address)

myip=10.0.0.$lastd

ifconfig eth0 $myip netmask 255.255.0.0
ifconfig eth1 192.168.0.1

while true; do
    sleep 10d
done