#!/usr/bin/python
from scapy.all import *

conf.verb = 0
for ip in range(100, 255):
    #packet = IP(dst="192.168.2." + str(ip), ttl=20)/ICMP()
    #on peut aussi en profiter pour envoyer un flag (ctf)
    MESSAGE = "code=01234"
    packet = IP(dst="192.168.2." + str(ip), ttl=20)/ICMP()/MESSAGE
    reply = sr1(packet, timeout=1)
    if not (reply is None):
         print(reply.src, "is online")