复制代码 代码如下:

#!/usr/bin/python

# -*- coding: utf-8 -*-

from scapy.all import *

from time import ctime,sleep

import threading

TIMEOUT = 4

conf.verb=0

def pro(cc,handle):

dst = "192.168.1." + str(cc)

packet = IP(dst=dst, ttl=20)/ICMP()

reply = sr1(packet, timeout=TIMEOUT)

if not (reply is None):

handle.write(reply.src+" is online"+"n")

#print reply.src, "is online"

def main():

threads=[]

f=open('ip.log','a')

for i in range(2,254):

t=threading.Thread(target=pro,args=(i,f))

threads.append(t)

print "main Thread begins at ",ctime()

for t in threads :

t.start()

for t in threads :

t.join()

print "main Thread ends at ",ctime()

if __name__=="__main__" :

main();