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)