from argparse import ArgumentParser
from time import sleep
import scapy.all as scapy


deviceList = {}


def getArguments():

	myParser = ArgumentParser()
	myParser.add_argument("-r")
	myParser.add_argument("-l")
	return myParser.parse_args()



def ipControl(ip):
	
	c = ip.count("/")
	d = ip.count(".")
	
	if (d == 3):
		ip = ip.replace("/", ".").split(".")
		
		for i in ip[:4]:
			if (not i.isnumeric()) or (int(i) not in range(0, 255)):
				return False
		
		if (c == 0):
			return True
			
		elif (c == 1):
			return (ip[-1] in ("8", "16", "24", "32"))
			
		else:
			return False	
	
	else:
		return False
	
	




def scan(ipRange):

	arpPacket = scapy.ARP(psrc="", pdst=ipRange)
	broadcastPacket = scapy.Ether(dst="ff:ff:ff:ff:ff:ff")
	arpBroadcastPacket = broadcastPacket/arpPacket
	answeredList = scapy.srp(arpBroadcastPacket, retry=1, timeout=1, verbose=False)[0]
	
	for info in answeredList:
		info = info[1]
		if (info.psrc not in deviceList):
			deviceList[info.psrc] = info.hwsrc



def display():

	print("     IP                     MAC")
	print("--------------------------------------")
	for (ip, mac) in deviceList.items():
		print(ip.ljust(20), mac)



arguments = getArguments()
ip_range = arguments.r
loop_value = arguments.l

if (ip_range) and (ipControl(ip_range)):

	if (loop_value != None) and (int(loop_value) > 0):

		for i in range(0, int(loop_value)):
			scan(ip_range)
			sleep(1)
			
	
	else:
		scan(ip_range)
	
	display()


else:
	print("[!]-> IP range error! <-[!]")