63 lines
1.9 KiB
Python
63 lines
1.9 KiB
Python
# Copyright 2016 Red Hat, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import functools
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import random
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import netaddr
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from neutron.tests.common.exclusive_resources import resource_allocator
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TEST_NET_RANGE = {
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1: ('192.0.2.1', '192.0.2.254'),
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2: ('198.51.100.1', '198.51.100.254'),
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3: ('203.0.113.1', '203.0.113.254'),
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}
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def get_test_net_address_fixture(test_net_number):
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"""Return exclusive ip address on the system based on RFC 5737.
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:param block: One of following constants: 1, 2, 3
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https://tools.ietf.org/html/rfc5737
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"""
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try:
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net_range = TEST_NET_RANGE[test_net_number]
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except KeyError:
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raise ValueError("Unknown constant for TEST-NET: %d" % test_net_number)
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return ExclusiveIPAddress(*net_range)
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def get_random_ip(low, high):
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parent_range = netaddr.IPRange(low, high)
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return str(random.choice(parent_range))
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class ExclusiveIPAddress(resource_allocator.ExclusiveResource):
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"""Allocate a unique ip address.
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:ivar address: allocated ip address
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:type address: netaddr.IPAddress
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"""
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def __init__(self, low, high):
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super(ExclusiveIPAddress, self).__init__(
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'ip_addresses', functools.partial(get_random_ip, low, high))
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def _setUp(self):
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super(ExclusiveIPAddress, self)._setUp()
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self.address = netaddr.IPAddress(self.resource)
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