#!/bin/sh
#
# Univention System Setup
#  helper script: getting settings from dhclient
#
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# Copyright 2009-2022 Univention GmbH
#
# https://www.univention.de/
#
# All rights reserved.
#
# The source code of this program is made available
# under the terms of the GNU Affero General Public License version 3
# (GNU AGPL V3) as published by the Free Software Foundation.
#
# Binary versions of this program provided by Univention to you as
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# the program is provided in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
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# License with the Debian GNU/Linux or Univention distribution in file
# /usr/share/common-licenses/AGPL-3; if not, see
# <https://www.gnu.org/licenses/>.

case "$reason" in
	PREINIT)
		# The DHCP client is requesting that an interface be
		# configured as required in order to send packets prior to
		# receiving an actual address. - dhclient-script(8)

		#if [ -n "$alias_ip_address" ]; then
		#	# Bring down alias interface. Its routes will disappear too.
		#	ifconfig $interface:0- inet 0
		#fi

		# silence the kernel printk
		PRINTK=$(cat /proc/sys/kernel/printk)
		echo "0" >/proc/sys/kernel/printk

		# basic interface setup if it is not already up
		ip link show "$interface" | grep -w UP || ip link set "$interface" dynamic off up

		# We need to give the kernel some time to get the interface up.
		sleep 1
		# echo "$PRINTK" >/proc/sys/kernel/printk
		;;
    BOUND|RENEW|REBIND|REBOOT)
		set -- $new_routers
		first_router="$1"

		i=1
		for new_nameserver in $new_domain_name_servers; do
			eval nameserver_$i=$new_nameserver
			i=$((i+1))
		done
		if [ -n "$dhclientscript_outputfile" ]; then
			cat > $dhclientscript_outputfile <<%EOF%
${interface}_ip="$new_ip_address"
${interface}_netmask="$new_subnet_mask"
${interface}_broadcast="$new_broadcast_address"
gateway="$first_router"
nameserver_1="$nameserver_1"
nameserver_2="$nameserver_2"
nameserver_3="$nameserver_3"
domainname="$new_domain_name"
%EOF%
		fi

        ;;
esac

exit 0
