#!/usr/bin/env python
"""
Author:     phillips321 contact at phillips321.co.uk
License:    CC BY-SA 3.0
Use:        Simple scapy arpscanner
Released:   www.phillips321.co.uk
Dependencies:
    scapy
ChangeLog:
    v0.1 - first release
"""
version = "0.1"
import sys, netifaces, thread
from scapy.all import *
if len(sys.argv) == 2 :
    interface = sys.argv[1]
else: #no values defined print help
    print "Usage: %s [interface] \n   eg: %s eth0" % (sys.argv[0],sys.argv[0])
    exit(1)

sourceipaddress = netifaces.ifaddresses(interface)[2][0]['addr']
parts = sourceipaddress.split(".")
lefthandside = parts[0] + "." + parts[1] + "." + parts[2] + "."
global pkts

def sniffer_thread(interface):
    global pkts
    pkts = sniff(iface=interface, filter="arp", timeout=15)

def arpscan_thread(target, interface, right):
    arpRequest = Ether(dst="ff:ff:ff:ff:ff:ff:ff")/ARP(pdst=target, hwdst="ff:ff:ff:ff:ff:ff")
    sendp(arpRequest, iface=interface, verbose=0)
    if right == 255:
        global endtime
        endtime = time.time()

thread.start_new_thread(sniffer_thread, (interface,))

time.sleep(1)

starttime = time.time()

for right in range(1,256):
    target = lefthandside + str(right)
    thread.start_new_thread(arpscan_thread, (target, interface, right))
endtime = 0.0
while endtime == 0.0:
    pass

totaltime = endtime - starttime
sleeptime = 15 - totaltime
print "Sent ARP requests in %f seconds, waiting %f more seconds for responses..." % (totaltime, sleeptime)
time.sleep(sleeptime)

for i in range(0,len(pkts)):
        if pkts[i].type == 2054:
            if pkts[i].op == 2:
                print "Response from " + pkts[i].psrc + " using " + pkts[i].hwsrc