46 lines
1.4 KiB
Python
46 lines
1.4 KiB
Python
# Copyright 2014 DreamHost, LLC
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#
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# Author: DreamHost, LLC
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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 logging
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import re
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from akanda.router.drivers import base
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LOG = logging.getLogger(__name__)
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class ARPManager(base.Manager):
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EXECUTABLE = '/usr/sbin/arp'
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def remove_stale_entries(self, config):
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for network in config.networks:
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for a in network.address_allocations:
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for ip in a.dhcp_addresses:
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address_for_ip = self._mac_address_for_ip(ip)
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if address_for_ip and address_for_ip != a.mac_address:
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self._delete_from_arp_cache(ip)
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def _mac_address_for_ip(self, ip):
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cmd_out = self.sudo('-an')
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match = re.search(' \(%s\) at ([^\s]+)' % ip, cmd_out)
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if match and match.groups():
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return match.group(1)
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def _delete_from_arp_cache(self, ip):
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self.sudo('-d', ip)
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