#!/bin/bash
#
# 450dhcpdns_create
#  Creates a UCR-policy for DHCP DNS settings
#
# Depends: ucs-school-import
#
# Copyright 2010-2017 Univention GmbH
#
# http://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
# well as other copyrighted, protected or trademarked materials like
# Logos, graphics, fonts, specific documentations and configurations,
# cryptographic keys etc. are subject to a license agreement between
# you and Univention and not subject to the GNU AGPL V3.
#
# In the case you use this program under the terms of the GNU AGPL V3,
# 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.
#
# You should have received a copy of the GNU Affero General Public
# License with the Debian GNU/Linux or Univention distribution in file
# /usr/share/common-licenses/AGPL-3; if not, see
# <http://www.gnu.org/licenses/>.

[ $# -ne 2 ] && echo "USAGE: $(basename $0) FILE DN" && exit 1

eval "$(ucr shell)"
. /usr/share/univention-lib/all.sh


if ! is_ucr_true "ucsschool/import/generate/policy/dhcp/dns/set_per_ou" ; then
	echo "$(basename $0): creation of DHCP DNS policy has been disabled by ucsschool/import/generate/policy/dhcp/dns/set_per_ou"
	exit 0
fi

# create dhcp dns policies for all local OUs (Bug #31930)
IFS="
"
ouname="$(awk -F '\t' '{print $1}' "$1" | tr '[:upper:]' '[:lower:]')"
echo "$(basename $0): modifying OU $ouname ..."
# determine list of available OUs
for oudn in $(univention-ldapsearch -xLLL -b "$ldap_base" "(&(objectClass=ucsschoolOrganizationalUnit)(ou=$ouname))" dn | ldapsearch-wrapper | sed -nre 's/^dn: //p') ; do
	# create dhcp dns policy if missing
	udm policies/dhcp_dns create --ignore_exists \
		--position "cn=policies,$oudn" \
		--set name="dhcp-dns-$ouname"

	# in a single server environment, the master is the DNS server
	if is_ucr_true "ucsschool/singlemaster" ; then
		if [ "$server_role" = "domaincontroller_master" ] ; then
			udm policies/dhcp_dns modify \
				--dn "cn=dhcp-dns-$ouname,cn=policies,$oudn" \
				--set domain_name_servers="$(get_default_ip_address)" \
				--set domain_name="$domainname"
		fi
	fi

	# assign dhcp dns policy to dhcp container if missing
	udm container/cn modify \
		--dn "cn=dhcp,$oudn" \
		--policy-reference "cn=dhcp-dns-${ouname},cn=policies,$oudn"
done

echo "$(basename $0): done"

exit 0
