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# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# Copyright 2011 Justin Santa Barbara
# 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.
"""RFC2462 style IPv6 address generation."""
import netaddr
from nova.openstack.common.gettextutils import _
def to_global(prefix, mac, project_id):
try:
mac64 = netaddr.EUI(mac).eui64().words
int_addr = int(''.join(['%02x' % i for i in mac64]), 16)
mac64_addr = netaddr.IPAddress(int_addr)
maskIP = netaddr.IPNetwork(prefix).ip
return (mac64_addr ^ netaddr.IPAddress('::0200:0:0:0') |
maskIP).format()
except netaddr.AddrFormatError:
raise TypeError(_('Bad mac for to_global_ipv6: %s') % mac)
except TypeError:
raise TypeError(_('Bad prefix for to_global_ipv6: %s') % prefix)
def to_mac(ipv6_address):
address = netaddr.IPAddress(ipv6_address)
mask1 = netaddr.IPAddress('::ffff:ffff:ffff:ffff')
mask2 = netaddr.IPAddress('::0200:0:0:0')
mac64 = netaddr.EUI(int(address & mask1 ^ mask2)).words
return ':'.join(['%02x' % i for i in mac64[0:3] + mac64[5:8]])
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