35 lines
1.3 KiB
Python
35 lines
1.3 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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#
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# IP6TOOLS.PY -- IPv6 manipulation routines
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#
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# Copyright © 2011 Nicolas Dandrimont <olasd@crans.org>
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#
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# Authors: Nicolas Dandrimont <olasd@crans.org>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import netaddr
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def mac_to_ipv6(ipv6_prefix, mac_address):
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"""Convert a MAC address (EUI48) to an IPv6 (prefix::EUI64)."""
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if mac_address == '<automatique>':
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return ''
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if type(mac_address) in [str, unicode]:
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mac_address = netaddr.EUI(mac_address)
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addr = int(mac_address.bits(netaddr.mac_bare), 2)
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ip6addr = (((addr >> 24) ^ (1 << 17)) << 40) | (0xFFFE << 24) | (addr & 0xFFFFFF)
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n = netaddr.IPNetwork(ipv6_prefix)
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return netaddr.IPAddress(n.first + ip6addr)
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