# Configuration file for setting IP addresses for a network interface.

INTERFACE="$1"
DOCKER_USER_INTERFACE=net-tools0

HWADDR="00:00:5e:00:53:ff"

IPV6_ADDR_1="2001:db8::254"
IPV6_ROUTE_1="2001:db8::/64"

IPV4_ADDR_1="192.0.2.254"
IPV4_ROUTE_1="192.0.2.0/24"

DOCKER_INTERFACE=$( docker network create \
		    --subnet $IPV4_ROUTE_1 \
		    --gateway $IPV4_ADDR_1 \
		    --ipv6=true \
		    --subnet $IPV6_ROUTE_1 \
		    --gateway $IPV6_ADDR_1 \
		    $DOCKER_USER_INTERFACE )

if [ $? -eq 0 ]
then
	DOCKER_INTERFACE="br-$(echo $DOCKER_INTERFACE | cut -c -12)"

	ip link set dev $INTERFACE address $HWADDR

	brctl addif $DOCKER_INTERFACE $INTERFACE

	# By default the LLDP packets are not crossing the bridge interface
	# so need to enable it here.
	echo 16384 > /sys/class/net/${DOCKER_INTERFACE}/bridge/group_fwd_mask

	ip link set dev $INTERFACE up
else
	DOCKER_INTERFACE=br-"$(docker network ls | \
			 grep $DOCKER_USER_INTERFACE | \
			 (read br rest ; echo $br) )"
fi

echo $DOCKER_INTERFACE