Suspend on LAN Service

sol.py

import win32serviceutil
import servicemanager
import ctypes
import socket
import select
import netifaces
import time
from contextlib import closing

def suspend(hibernate=False):
    ctypes.windll.PowrProf.SetSuspendState(hibernate, 0, 0)

def macaddrs():
    return [netifaces.ifaddresses(iface_name)[netifaces.AF_LINK][0]['addr'].lower() for iface_name in netifaces.interfaces()]

def get_macaddr(data):
    if data[:6] != '\xFF' * 6 or len(data) != 102:
        return None
    mac = data[6:12]
    if data[6:] != mac * 16:
        return None
    return ':'.join(['%02x' % ord(x) for x in mac])

class SoLService(win32serviceutil.ServiceFramework):
    _svc_name_ = 'SoLService'
    _svc_display_name_ = 'Suspend on LAN'
    _svc_description_ = 'Suspend on LAN Service'
    port = 9
    hibernate = True

    def SvcStop(self):
        self.run = False

    def SvcDoRun(self):
        self.run = True
        with closing(socket.socket(socket.AF_INET, socket.SOCK_DGRAM)) as sock:
            sock.bind(('', self.port))
            while self.run:
                rlist, wlist, xlist = select.select([sock], [], [], 0)
                for s in rlist:
                    try:
                        data, addr = s.recvfrom(1024)
                        if get_macaddr(data) in macaddrs():
                            servicemanager.LogInfoMsg('Suspended by SoL')
                            suspend(self.hibernate)
                    except socket.error as e:
                        pass
                else:
                    time.sleep(0.1)

if __name__ == '__main__':
    win32serviceutil.HandleCommandLine(SoLService)