bin/mac.py

mac.py

#!/usr/bin/env python

from string import hexdigits
from sys import argv

OUIDB = '/usr/share/nmap/nmap-mac-prefixes'


def fmt_mac_three(m):
    return f"{m[:4]}-{m[4:8]}-{m[8:13]}"


def fmt_mac_six(m):
    return f"{m[:2]}:{m[2:4]}:{m[4:6]}:{m[6:8]}:{m[8:10]}:{m[10:12]}"


smac = ''

for c in argv[1]:
    if c in hexdigits:
        smac += c

bmac = bytes.fromhex(smac)

print(f"MAC address {smac} {fmt_mac_three(smac)} {fmt_mac_six(smac)}")

if int.from_bytes(bmac[:1], byteorder='big') & 1 << 1:
    if int.from_bytes(bmac[:1], byteorder='big') & 1 << 0:
        print("Locally administered multicast address")
    else:
        print("Locally administered unicast address")
else:
    with open(OUIDB) as f:
        d = dict(x.rstrip().split(None, 1) for x in f)

    try:
        print(d[''.join(smac.upper())[:6]])
    except :
        print("Not found")