# Copyright (c) 2017 Cisco Systems Inc.
# All Rights Reserved.
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

import collections

from neutron.agent.linux import dhcp


class ApicDnsmasq(dhcp.Dnsmasq):
    @classmethod
    def get_isolated_subnets(cls, network):
        """Returns a dict indicating whether or not a subnet is isolated

        A subnet is always considered isolated for APIC.
        """
        isolated_subnets = collections.defaultdict(lambda: True)
        return isolated_subnets