Python_sniffer(网络嗅探器)

import socket
import threading
import time activeDegree=dict()
flag=1
def main():
global activeDegree
global glag
#获取本机IP地址
HOST=socket.gethostbyname(socket.gethostbyname())
#创建原始套接字,适用于Windows平台
#对于其他系统,要把socket.IPPROTO_IP替换为socket.IPPROTO_ICMP
s=socket.socket(socket.AF_INET,socket.SOCK_RAW,socket.IPPROTO_IP)
s.bind((HOST,0))
#设置在捕获数据包中含有IP包头
s.setsockopt(socket.IPPROTO_IP,socket.IP_HDRINCL,1)
#启用混杂模式,捕获所有数据包
s.ioctl(socket.SIO_RCVALL,socket.RCVALL_ON)
#开始捕获数据包
while flag:
c=s.recvfrom(65535)
host=c[1][0]
activeDegree[host]=activeDegree.get(host,0)+1
#假设本机ip地址为10.2.1.8
if c[1][0] != '10.2.1.8':
print(c)
#关闭混杂模式
s.ioctl(socket.TIO_RCVALL,socket.RCVALL_OFF)
s.close()
t=threading.Thread(target=main)
t.start()
time.sleep(60)
flag=0
t.join()
for item in activeDegree.items():
print(item)
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