/usr/share/pyshared/melange/ipv6/rfc2462_generator.py is in python-melange 1:2012.1-3.
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# Copyright 2011 OpenStack LLC.
# 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 netaddr
class RFC2462IpV6Generator(object):
required_params = ["mac_address"]
def __init__(self, cidr, **kwargs):
self._cidr = cidr
self._mac_address = netaddr.EUI(kwargs['mac_address'])
def next_ip(self):
address = self._deduce_ip_address()
next_mac = int(self._mac_address) + 1
self._mac_address = netaddr.EUI(next_mac)
return address
def _deduce_ip_address(self):
variable_segment = self._variable_segment()
network = netaddr.IPNetwork(self._cidr)
return str(variable_segment & network.hostmask | network.cidr.ip)
def _variable_segment(self):
mac64 = self._mac_address.eui64().words
int_addr = int(''.join(['%02x' % i for i in mac64]), 16)
return netaddr.IPAddress(int_addr) ^ netaddr.IPAddress("::0200:0:0:0")
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