#!/bin/sh
#
# ovpn-linkdown
#
# part of pfSense (https://www.pfsense.org)
# Copyright (c) 2004-2013 BSD Perimeter
# Copyright (c) 2013-2016 Electric Sheep Fencing
# Copyright (c) 2014-2026 Rubicon Communications, LLC (Netgate)
# All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

LOG_PREFIX_OPENVPN="OpenVPN"

if [ -n "${1}" ]; then
	/usr/bin/logger -p user.notice -t openvpn "NOTICE [${LOG_PREFIX_OPENVPN}] Flushing states on OpenVPN interface ${1} (Link Down)"
	/sbin/pfctl -i "${1}" -Fs
else
	/usr/bin/logger -p user.warning -t openvpn "WARNING [${LOG_PREFIX_OPENVPN}] ovpn-linkdown called without interface"
fi

/bin/rm -f "/var/etc/searchdomain_${1}"

if [ -f "/tmp/${1}_router" ]; then
	/bin/mv "/tmp/${1}_router" "/tmp/${1}_router.last"
fi
if [ -f "/tmp/${1}_routerv6" ]; then
	/bin/mv "/tmp/${1}_routerv6" "/tmp/${1}_routerv6.last"
fi
/bin/rm -f "/tmp/${1}up"
/usr/local/sbin/pfSctl -c 'filter reload'

if [ -f "/var/etc/nameserver_${1}" ] || [ -f "/var/etc/nameserver_v6${1}" ]; then
	/bin/rm -f "/var/etc/nameserver_${1}"
	/bin/rm -f "/var/etc/nameserver_v6${1}"
	if /usr/bin/pgrep -q -a -F /var/run/unbound.pid unbound >/dev/null 2>&1; then
		/usr/local/sbin/pfSsh.php playback svc restart unbound
	elif /usr/bin/pgrep -q -a -F /var/run/dnsmasq.pid unbound >/dev/null 2>&1; then
		/usr/local/sbin/pfSsh.php playback svc restart dnsmasq
	fi
fi
