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)