import socket, binascii, threading, time

# MAC server discovery by BigNerd95

search = True
devices = []

def discovery(sock):
    global search
    while search:
        sock.sendto(b"\x00\x00\x00\x00", ("255.255.255.255", 5678))
        time.sleep(1)

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
sock.bind(("0.0.0.0", 5678))

threading.Thread(target=discovery, args=(sock,)).start()

print("Looking for Mikrotik devices (MAC servers)\n")

while search:
    try:
        data, addr = sock.recvfrom(1024)
        if b"\x00\x01\x00\x06" in data:
            start = data.index(b"\x00\x01\x00\x06") + 4
            mac = data[start:start+6]
            
            if mac not in devices:
                devices.append(mac)

                #print(addr[0])
                print('\t' + ':'.join('%02x' % b for b in mac))
                print()
    except KeyboardInterrupt:
        search = False
        break