discovery.py

from scapy.all import *
response = ""
def discovery(dst, time):
    global response
    ethernet_layer = Ether(dst="ff:ff:ff:ff:ff:ff")
    arp_layer = ARP(pdst= dst)
    ans, unans = srp(ethernet_layer/arp_layer, timeout=int(time))

    for sent, received in ans:
        response = response + received[ARP].psrc + " "
    
    return response