core-agent-linux/network/setup-ip

#!/bin/sh

# setup-ip is potentially invoked before qubes-sysinit.sh is done, therefore
# we perform our qubesdb reads here instead of relying on qvm-service
# files under /var/run/qubes-service/
disablegw=`qubesdb-read /qubes-service/disable-default-route 2> /dev/null`
disabledns=`qubesdb-read /qubes-service/disable-dns-server 2> /dev/null`

# Location of files which contains list of protected files
PROTECTED_FILE_LIST='/etc/qubes/protected-files.d'

ip=`/usr/bin/qubesdb-read /qubes-ip 2> /dev/null`
if [ x$ip != x ]; then
    netmask=`/usr/bin/qubesdb-read /qubes-netmask`
    gateway=`/usr/bin/qubesdb-read /qubes-gateway`
    secondary_dns=`/usr/bin/qubesdb-read /qubes-secondary-dns`
    /sbin/ethtool -K $INTERFACE sg off
    /sbin/ethtool -K $INTERFACE tx off
    # If NetworkManager is enabled, let it configure the network
    if [ -f /var/run/qubes-service/network-manager ]; then
        nm_config=/etc/NetworkManager/system-connections/qubes-uplink-$INTERFACE
        cat > $nm_config <<__EOF__
[802-3-ethernet]
duplex=full

[ethernet]
mac-address=`ip l show dev $INTERFACE |grep link|awk '{print $2}'`

[connection]
id=VM uplink $INTERFACE
uuid=de85f79b-8c3d-405f-a652-cb4c10b4f9ef
type=802-3-ethernet

[ipv6]
method=ignore

[ipv4]
method=manual
may-fail=false
__EOF__
        if [ "x$disabledns" != "x1" ]; then
            echo "dns=$gateway;$secondary_dns" >> $nm_config
        fi
        if [ "x$disablegw" != "x1" ]; then
            echo "addresses1=$ip;32;$gateway" >> $nm_config
        else
            echo "addresses1=$ip;32" >> $nm_config
        fi
        chmod 600 $nm_config
    else
        # No NetworkManager enabled, configure the network manually
        /sbin/ifconfig $INTERFACE $ip netmask 255.255.255.255
        /sbin/ifconfig $INTERFACE up
        /sbin/route add -host $gateway dev $INTERFACE
        if [ "x$disablegw" != "x1" ]; then
            /sbin/route add default gw $gateway
        fi
        if ! grep -rq "^/etc/resolv[.]conf$" "${PROTECTED_FILE_LIST}" 2>/dev/null; then
        echo > /etc/resolv.conf
            if [ "x$disabledns" != "x1" ]; then
                echo "nameserver $gateway" > /etc/resolv.conf
                echo "nameserver $secondary_dns" >> /etc/resolv.conf
            fi
        fi
    fi
    network=$(qubesdb-read /qubes-netvm-network 2>/dev/null)
    if [ "x$network" != "x" ] && [ "x$disabledns" != "x1" ]; then
        gateway=$(qubesdb-read /qubes-netvm-gateway)
        netmask=$(qubesdb-read /qubes-netvm-netmask)
        secondary_dns=$(qubesdb-read /qubes-netvm-secondary-dns)
        echo "NS1=$gateway" > /var/run/qubes/qubes-ns
        echo "NS2=$secondary_dns" >> /var/run/qubes/qubes-ns
        /usr/lib/qubes/qubes-setup-dnat-to-ns
    fi
    if [ "x$network" != "x" ]; then
        [ -x /rw/config/qubes-ip-change-hook ] && /rw/config/qubes-ip-change-hook
        # XXX: Backward compatibility
        [ -x /rw/config/qubes_ip_change_hook ] && /rw/config/qubes_ip_change_hook
    fi
fi