c24e16a505
In order to support stateless IPv6, neutron should calculate IPv6 address base on IPv6 prefix and MAC address via EUI-64 specification. This change adds common library to calculate IPv6 address. Partially-implements bp ipv6-two-attributes Co-Authored-By: Xu Han Peng <xuhanp@cn.ibm.com> Change-Id: I68ccbc42388ec760d6fead242e080822ca753913
40 lines
1.5 KiB
Python
40 lines
1.5 KiB
Python
# Copyright 2013 IBM Corp.
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# All Rights Reserved.
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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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"""
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IPv6-related utilities and helper functions.
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"""
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import netaddr
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def get_ipv6_addr_by_EUI64(prefix, mac):
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# Check if the prefix is IPv4 address
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isIPv4 = netaddr.valid_ipv4(prefix)
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if isIPv4:
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msg = _("Unable to generate IP address by EUI64 for IPv4 prefix")
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raise TypeError(msg)
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try:
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eui64 = int(netaddr.EUI(mac).eui64())
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prefix = netaddr.IPNetwork(prefix)
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return netaddr.IPAddress(prefix.first + eui64 ^ (1 << 57))
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except netaddr.AddrFormatError:
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raise TypeError(_('Bad prefix or mac format for generating IPv6 '
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'address by EUI-64: %(prefix)s, %(mac)s:')
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% {'prefix': prefix, 'mac': mac})
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except TypeError:
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raise TypeError(_('Bad prefix type for generate IPv6 address by '
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'EUI-64: %s') % prefix)
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