core-agent-linux/network/setup_ip

#!/bin/sh

ip=`/usr/bin/xenstore-read qubes_ip 2> /dev/null`
if [ x$ip != x ]; then
    netmask=`/usr/bin/xenstore-read qubes_netmask`
    gateway=`/usr/bin/xenstore-read qubes_gateway`
    secondary_dns=`/usr/bin/xenstore-read qubes_secondary_dns`
    /sbin/ifconfig $INTERFACE $ip netmask 255.255.255.255
    /sbin/ifconfig $INTERFACE up
    /sbin/route add -host $gateway dev $INTERFACE
    /sbin/route add default gw $gateway
    /sbin/ethtool -K $INTERFACE sg off
    echo "nameserver $gateway" > /etc/resolv.conf
    echo "nameserver $secondary_dns" >> /etc/resolv.conf
	network=$(/usr/bin/xenstore-read qubes_netvm_network 2>/dev/null)
	if [ "x$network" != "x" ]; then
		gateway=$(/usr/bin/xenstore-read qubes_netvm_gateway)
		netmask=$(/usr/bin/xenstore-read qubes_netvm_netmask)
		secondary_dns=$(/usr/bin/xenstore-read qubes_netvm_secondary_dns)
		echo "NS1=$gateway" > /var/run/qubes/qubes_ns
		echo "NS2=$secondary_dns" >> /var/run/qubes/qubes_ns
		/usr/lib/qubes/qubes_setup_dnat_to_ns
		[ -x /rw/config/qubes_ip_change_hook ] && /rw/config/qubes_ip_change_hook
	fi

fi