case "$INTERFACE" in
  "client"|\
  "mmfd")
	;;
  *)
	exit 0
	;;
esac

BPFCOUNTD_RUN="/var/run/bpfcountd"
mkdir -p "${BPFCOUNTD_RUN}/gluon-ifaces"

get_ifup_ifaces() {
	local ifaces="$DEVICE"
	local brports

	if [ -d "/sys/class/net/$DEVICE/bridge/" ]; then
		brports="$(ls "/sys/class/net/$DEVICE/brif/")"
		[ -n "$brports" ] && ifaces="$(echo -e "${brports}\n${ifaces}")"
	fi

	echo "$ifaces"
}

get_ifdown_ifaces() {
	cat "${BPFCOUNTD_RUN}/gluon-ifaces/$INTERFACE"
}

bpfcountd_start() {
	local ifaces="$(get_ifup_ifaces)"
	local iface

	[ -z "$ifaces" ] && return
	[ -f "${BPFCOUNTD_RUN}/gluon-ifaces/$INTERFACE" ] && return
	echo "$ifaces" > "${BPFCOUNTD_RUN}/gluon-ifaces/$INTERFACE"

	for iface in $ifaces; do
		IFNAME="$iface" /lib/gluon/core/mesh/setup.d/40-bpfcountd "clients"
	done
}

bpfcountd_stop() {
	local ifaces="$(get_ifdown_ifaces)"
	local iface

	[ -z "$ifaces" ] && return
	rm "${BPFCOUNTD_RUN}/gluon-ifaces/$INTERFACE"

	for iface in $ifaces; do
		IFNAME="$iface" /lib/gluon/core/mesh/teardown.d/40-bpfcountd
	done
}

# synchronize reads+writes to /var/run/gluon-ifaces/$INTERFACE
lock /var/lock/gluon_bpfcountd_ifaces.lock

case "$ACTION" in
  "ifup")
	bpfcountd_start
	;;
  "ifdown")
	bpfcountd_stop
	;;
  *)
	;;
esac

lock -u /var/lock/gluon_bpfcountd_ifaces.lock