#!/bin/sh
[ -z "${VERBOSE}" ] || set -x

[ -z "${IF_METRIC}" ] && IF_METRIC="1"
[ -n "${IF_VRF_TABLE}" ] && VRF_TABLE="table ${IF_VRF_TABLE}"
[ -n "${IF_VRF_MEMBER}" ] && VRF_TABLE="vrf ${IF_VRF_MEMBER}"
[ -n "${IF_METRIC}" ] && METRIC="metric ${IF_METRIC}"


addr_family() {
	if [ "$1" != "${1#*[0-9].[0-9]}" ]; then
		echo "-4"
	elif [ "$1" != "${1#*:[0-9a-fA-F]}" ]; then
		echo "-6"
	else
		exit 1
	fi
}

configure_addresses() {
	for addr in ${IF_ADDRESSES}; do
		addrfam=$(addr_family ${addr})
		if [ "${IF_POINT_TO_POINT}" -a "${addrfam}" = "-4" ]; then
			PEER="peer ${IF_POINT_TO_POINT}"
		else
			PEER=""
		fi

		if [ -z "${MOCK}" -a "${1}" = "del" ]; then
			# When having multiple addresses set from the same prefix they might/will(?) be configured
			# as 'secondary' and implicitly removed when removing the non-secondary address. This
			# leads ip complaining about not being able to remove the secondaries as they are already
			# gone. So we ignore errors while deconfiguring addresses as they liked occur when removing
			# a vanish address anyway.
			${MOCK} ip "${addrfam}" addr "${1}" "${addr}" ${PEER} dev "${IFACE}" 2>/dev/null
		else
			${MOCK} ip "${addrfam}" addr "${1}" "${addr}" ${PEER} dev "${IFACE}"
		fi
	done
}

configure_gateways() {
	for gw in ${IF_GATEWAYS}; do
		addrfam=$(addr_family ${gw})
		${MOCK} ip "${addrfam}" route "${1}" default via "${gw}" ${VRF_TABLE} ${METRIC} dev "${IFACE}"
	done
}

case "$PHASE" in
up)
	configure_addresses add
	configure_gateways add
	;;
down)
	configure_gateways del
	configure_addresses del
	;;
*)	exit 0 ;;
esac