#
# UCS test
#
# Copyright 2013-2018 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/>.

import time

import dns.resolver as resolver
from dns.exception import Timeout
from dns.resolver import NXDOMAIN
from dns.resolver import NoNameservers


def resolveDnsEntry(zoneName, resourceRecord, timeout=120, tries=3):
	start = time.time()

	while True:
		try:
			answers = resolver.query(zoneName, resourceRecord)
			return answers
		except Timeout:
			tries -= 1
			if tries < 0:
				raise
		except (NXDOMAIN, NoNameservers):
			diff = time.time() - start
			if diff > timeout:
				raise

		time.sleep(1)


if __name__ == '__main__':
    pass
