Wake on LAN

wol.py

import struct
import socket


def wake_on_lan(mac, *, broadcast="192.168.1.255"):
    """Send WOL pachet.
    
    https://en.wikipedia.org/wiki/Wake-on-LAN
    """
    
    match len(mac):
        case 12:
            pass
        case 12 + 5:
            sep = mac[2]
            mac = mac.replace(sep, '')
        case _:
            raise ValueError('Unexpected MAC address format {}'.format(mac))

    if isinstance(mac, str):
        mac = bytes(mac.encode())

    data = b"".join([b"FFFFFFFFFFFF", mac * 16])
    send_data = b""

    for i in range(0, len(data), 2):
        send_data = b"".join([send_data, struct.pack("B", int(data[i : i + 2], 16))])

    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
    sock.sendto(send_data, (broadcast, 9))


# wake_on_lan('3c:4a:92:88:d2:c8')  # NAS