Network Scanner

#!/usr/bin/python3
import scapy.all as scapy
import argparse


def get_ip():
    parser = argparse.ArgumentParser()
    parser.add_argument("-r", "--range", dest="ipaddr", help="Specify an IP Address or a range of IP Addresses")
    options = parser.parse_args()

    if not options.ipaddr:
        parser.error("[-] Specify an IP Address or a range of IP Addresses. Use --help for more details.")

    return options


def scan(ip):
    arp_header = scapy.ARP(pdst=ip)
    ether_header = scapy.Ether(dst="ff:ff:ff:ff:ff:ff")
    arp_request_packet = ether_header / arp_header
    answered_list = scapy.srp(arp_request_packet, timeout=1, verbose=False)[0]

    clients_list = []
    for elements in answered_list:
        client_dict = {"ip": elements[1].psrc, "mac": elements[1].hwsrc}
        clients_list.append(client_dict)

    return clients_list


def print_result(result_list):
    print("IP Address\t\tMAC Address")
    print("------------------------------------------")
    for client in result_list:
        print(client['ip'], "\t\t", client['mac'])


def main():
    ip = get_ip()
    scan_result = scan(ip.ipaddr)
    print_result(scan_result)


if __name__ == '__main__':
    main()