49 lines
1.7 KiB
Python
49 lines
1.7 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 netaddr
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from neutron.tests.common.exclusive_resources import ip_address
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from neutron.tests.common.exclusive_resources import resource_allocator
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def _get_random_network(low, high, netmask):
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ip = ip_address.get_random_ip(low, high)
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return str(netaddr.IPNetwork("%s/%s" % (ip, netmask)).cidr)
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class ExclusiveIPNetwork(resource_allocator.ExclusiveResource):
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"""Allocate a non-overlapping ip network.
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:ivar network: allocated ip network
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:type network: netaddr.IPNetwork
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"""
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def __init__(self, low, high, netmask):
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super(ExclusiveIPNetwork, self).__init__(
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'ip_networks',
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functools.partial(_get_random_network, low, high, netmask),
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self.is_valid)
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def _setUp(self):
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super(ExclusiveIPNetwork, self)._setUp()
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self.network = netaddr.IPNetwork(self.resource)
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def is_valid(self, new_resource, allocated_resources):
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new_ipset = netaddr.IPSet([new_resource])
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allocated_ipset = netaddr.IPSet(allocated_resources)
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return new_ipset.isdisjoint(allocated_ipset)
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