#!/usr/bin/env bash

if [ ${MODE} == "start" ]
then
    set -ue
elif [ ${MODE} == "stop" ]
then
    set -u
else
    echo "$(basename ${0}): mode must be one of either 'start' or 'stop'" 1>&2
    exit 1
fi

case ${PHASE} in
    "pre-up")
        /usr/sbin/ip link add ${IFACE} type wireguard
        /usr/sbin/ip link set dev ${IFACE} mtu {{ vpn_wireguard_mtu }}

        /usr/sbin/sysctl -q -w net.ipv6.conf.${IFACE}.autoconf=0

        /usr/bin/wg setconf ${IFACE} {{ system_etc_root_directory }}/network/interfaces/${IFACE}/wireguard/wireguard-{{ vpn_wireguard_role }}.conf

        /usr/sbin/ip -4 address add {{ vpn_wireguard_inet_address }}/{{ vpn_wireguard_inet_prefixlen }} dev ${IFACE}
        /usr/sbin/ip -6 address add {{ vpn_wireguard_inet6_address }}/{{ vpn_wireguard_inet6_prefixlen }} dev ${IFACE}
        ;;
    "post-up")
        ;;
    "pre-down")
        ;;
    "post-down")
        /usr/sbin/ip -6 address flush dev ${IFACE}
        /usr/sbin/ip -4 address flush dev ${IFACE}

        /usr/sbin/ip link delete dev ${IFACE}
        ;;
esac