#!/bin/sh
#
# ppp-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.

IF="${1}"
PROTOCOL="${2}"
LOCAL_IP="${3}"

if [ -f "/tmp/${IF}up" ] && [ -f "/conf/${IF}.log" ]; then
	seconds=$((`date -j +%s` - `/usr/bin/stat -f %m "/tmp/${IF}up"`))
	/usr/local/sbin/ppp-log-uptime.sh "$seconds" "${IF}" &
fi

if echo "${IF}" | /usr/bin/egrep -qv "ppp[0-9]+"; then
	/etc/rc.kill_states "${IF}" "${LOCAL_IP}"
fi

if [ "${PROTOCOL}" = "inet" ] && [ -s "/tmp/${IF}_defaultgw" ]; then
	GW=`head -n 1 "/tmp/${IF}_defaultgw"`
	DGW=`/sbin/route -n get -inet default | /usr/bin/awk '/gateway:/ {print $2}'`
	# Only remove the default gateway if it matches the gateway for this interface. See redmine #1837
	if [ "${GW}" = "${DGW}" ]; then
		/sbin/route -q delete default "${GW}"
	fi
fi

if [ "${PROTOCOL}" = "inet6" ]; then
	/usr/local/sbin/ppp-ipv6 "${IF}" down
fi
# delete the node just in case mpd cannot do that
/usr/sbin/ngctl shutdown "${IF}":
if [ -f "/var/etc/nameserver_${IF}" ]; then
	# Remove old entries
	for nameserver in `cat "/var/etc/nameserver_${IF}"`; do
		/sbin/route -q delete "${nameserver}" >/dev/null 2>&1
	done
	/bin/rm -f "/var/etc/nameserver_${IF}"
fi
# Do not remove gateway used during filter reload.

if [ -f "/tmp/${IF}_router" ]; then
	/bin/mv "/tmp/${IF}_router" "/tmp/${IF}_router.last"
fi

# cleanup all VIPs, see https://redmine.pfsense.org/issues/11629
if [ "${PROTOCOL}" != "inet6" ]; then
	while
		aliases=$(/sbin/ifconfig "${IF}" | /usr/bin/grep netmask)
		if [ -z "${aliases}" ]; then
			break
		fi
	do ifconfig "${IF}" -alias; done
fi

/bin/rm -f "/tmp/${IF}up"
/bin/rm -f "/tmp/${IF}_ip"
/usr/local/sbin/pfSctl -c 'service reload dns'
