ffmap-backend/hostid.py

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import re
from functools import reduce
def mac_to_hostid(mac):
int_mac = list(map(lambda x: int(x, 16), mac.split(":")))
int_mac[0] ^= 2
bytes = map(lambda x: "%02x" % x, int_mac[0:3] + [0xff, 0xfe] + int_mac[3:])
return reduce(lambda a, i:
[a[0] + ("" if i == 0 else ":") + a[1] + a[2]] + a[3:],
range(0, 4),
[""] + list(bytes)
)