38 lines
1.2 KiB
Python
38 lines
1.2 KiB
Python
# 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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import random
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def get_random_mac(base_mac):
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"""Get a random MAC address string of the specified base format.
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The first 3 octets will remain unchanged and the others will be
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randomly generated.
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:param base_mac: Base MAC address represented by an array of 6 strings/int
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:returns: The MAC address string.
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"""
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mac = [int(base_mac[0], 16), int(base_mac[1], 16),
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int(base_mac[2], 16), random.getrandbits(8),
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random.getrandbits(8), random.getrandbits(8)]
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return ':'.join(["%02x" % byte for byte in mac])
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def set_mask(data, mask):
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return data | mask
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def unset_mask(data, mask, bit_size=32):
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return data & ((2 ** bit_size - 1) ^ mask)
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