92a20d0755
Notably mac.is_multicast() which is needed for TAPs / LCPs and interfaces. Add a test for interface MAC addresses being non-multicast.
49 lines
1.4 KiB
Python
49 lines
1.4 KiB
Python
#
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# Copyright (c) 2022 Pim van Pelt
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at:
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# http://www.apache.org/licenses/LICENSE-2.0
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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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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import logging
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import netaddr
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def is_valid(mac):
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""" Return True if the string given in `mac` is a valid (6-byte) MAC address,
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as defined by netaddr.EUI """
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try:
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addr = netaddr.EUI(mac)
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except:
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return False
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return True
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def is_local(mac):
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""" Return True if a MAC address is a valid locally administered one. """
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try:
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addr = netaddr.EUI(mac)
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except:
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return False
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return bool(addr.words[0] & 0b10)
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def is_multicast(mac):
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""" Return True if a MAC address is a valid multicast one. """
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try:
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addr = netaddr.EUI(mac)
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except:
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return False
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return bool(addr.words[0] & 0b01)
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def is_unicast(mac):
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""" Return True if a MAC address is a valid unicast one. """
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try:
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addr = netaddr.EUI(mac)
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except:
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return False
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return not bool(addr.words[0] & 0b01)
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