#!/bin/sh
#
# ppp-linkup
#
# 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.

export PATH=/bin:/usr/bin:/usr/local/bin:/sbin:/usr/sbin:/usr/local/sbin

DNSALLOWOVERRIDE=$(/usr/local/sbin/read_xml_tag.sh boolean system/dnsallowoverride)

IF="${1}"
PROTOCOL="${2}"
LOCAL_IP="${3}"
REMOTE_IP="${4}"
AUTH_NAME="${5}"
DNS1_RAW="${6}"
DNS2_RAW="${7}"

if [ "${PROTOCOL}" = "inet" ]; then
	# let the configuration system know that the ipv4 has changed.
	echo "${REMOTE_IP}" > "/tmp/${IF}_router"
	/bin/rm -f "/tmp/${IF}_router.last"
	echo "${LOCAL_IP}" > "/tmp/${IF}_ip"
	touch "/tmp/${IF}up"
	touch "/tmp/${IF}_upstart4"

	if [ "${DNSALLOWOVERRIDE}" = "true" ]; then
		# write nameservers to file
		echo -n "" > "/var/etc/nameserver_${IF}"
		if echo "${DNS1_RAW}" | grep -q dns1; then
			DNS1=`echo "${DNS1_RAW}" | awk '{print $2}'`
			echo "${DNS1}" >> "/var/etc/nameserver_${IF}"
			route change "${DNS1}" "${REMOTE_IP}" \
				|| route add "${DNS1}" "${REMOTE_IP}"
		fi
		if echo "${DNS2_RAW}" | grep -q dns2; then
			DNS2=`echo "${DNS2_RAW}" | awk '{print $2}'`
			echo "${DNS2}" >> "/var/etc/nameserver_${IF}"
			route change "${DNS2}" "${REMOTE_IP}" \
				|| route add "${DNS2}" "${REMOTE_IP}"
		fi
		pfSctl -c 'service reload dns'
		sleep 1
	fi
	pfSctl -c "interface newip ${IF}"

elif [ "${PROTOCOL}" = "inet6" ]; then
	/usr/local/sbin/ppp-ipv6 "${IF}" up
	# let the configuration system know that the ipv6 has changed.
	echo "${REMOTE_IP}" > "/tmp/${IF}_routerv6"
	/bin/rm -f "/tmp/${IF}_routerv6.last"
	echo "${LOCAL_IP}" | cut -d% -f1 > "/tmp/${IF}_ipv6"
	touch "/tmp/${IF}upv6"
	touch "/tmp/${IF}_upstart6"

	if [ "${DNSALLOWOVERRIDE}" = "true" ]; then
		# write nameservers to file
		echo -n "" > "/var/etc/nameserver_v6${IF}"
		if echo "${DNS1_RAW}" | grep -q dns1; then
			DNS1=`echo "${DNS1_RAW}" | awk '{print $2}'`
			echo "${DNS1}" >> "/var/etc/nameserver_v6${IF}"
			route change -inet6 "${DNS1}" "${REMOTE_IP}" \
				|| route add -inet6 "${DNS1}" "${REMOTE_IP}"
		fi
		if echo "${DNS2_RAW}" | grep -q dns2; then
			DNS2=`echo "${DNS2_RAW}" | awk '{print $2}'`
			echo "${DNS2}" >> "/var/etc/nameserver_v6${IF}"
			route change -inet6 "${DNS2}" "${REMOTE_IP}" \
				|| route add -inet6 "${DNS2}" "${REMOTE_IP}"
		fi
		pfSctl -c 'service reload dns'
		sleep 1
	fi
	pfSctl -c "interface newipv6 ${IF}"
fi

exit 0
