scan alive host by python3

scan-host-alive.py

from scapy.all import *
import ipaddress
import argparse

# from https://npfs06.top/
# need install scapy:
# pip isntall scapy

def icmp_request(ip_dst):
    global a  # call a
    pocket = Ether()/IP(dst=ip_dst)/ICMP(type=8)/b'Hello'
    req = srp1(pocket, timeout=2, verbose=False)
    if req:
        print('[+]', ip_dst, ' Host is up')
        a += 1

def icmp_speed(network):
    threads = []
    length = len(network)
    for ip in network:
        t = threading.Thread(target=icmp_request, args=(str(ip),))
        threads.append(t)
    for i in range(length):
        threads[i].start()
    for i in range(length):
        threads[i].join()

def main():
    parser = argparse.ArgumentParser(description='imformation')
    # type是要传入的参数的数据类型  help是该参数的提示信息
    parser.add_argument('network', type=str, help='eg: 192.168.1.0/24')
    args = parser.parse_args()
    print("----------------scan begin(%s)----------------"%time.ctime())
    network = list(ipaddress.ip_network(args.network))
    icmp_speed(network)
    print("----------------scan end(%s)------------------"%time.ctime())
    print("Scan finished: ", len(network), "IP addresses (", a, "hosts up) scanned")

if __name__ == '__main__':
    a = 0
    main()

# exp:
# python3 scan-host-alive.py 192.168.1.1/24