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python检测远程udp端口是否打开的方法

2024-04-03 11:12:03 468

本文实例讲述了python检测远程udp端口是否打开的方法。分享给大家供大家参考。具体实现方法如下：

importsocket

importthreading

importtime

importstruct

importQueue

queue=Queue.Queue()

defudp_sender(ip,port):

   try:

       ADDR=(ip,port)

       sock_udp=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)

       sock_udp.sendto("abcd...",ADDR)

       sock_udp.close()

   except:

       pass

deficmp_receiver(ip,port):

   icmp=socket.getprotobyname("icmp")

   try:

       sock_icmp=socket.socket(socket.AF_INET,socket.SOCK_RAW,icmp)

   exceptsocket.error,(errno,msg):

       iferrno==1:

           #Operationnotpermitted

           msg=msg+(

               "-NotethatICMPmessagescanonlybesentfromprocesses"

               "runningasroot."

           )

           raisesocket.error(msg)

       raise#raisetheoriginalerror

   sock_icmp.settimeout(3)

   try:

       recPacket,addr=sock_icmp.recvfrom(64)

   except:

       queue.put(True)

       return

   icmpHeader=recPacket[20:28]

   icmpPort=int(recPacket.encode('hex')[100:104],16)

   head_type,code,checksum,packetID,sequence=struct.unpack(

           "bbHHh",icmpHeader

   )

   sock_icmp.close()

   ifcode==3andicmpPort==portandaddr[0]==ip:

       queue.put(False)

   return

defchecker_udp(ip,port):

   thread_udp=threading.Thread(target=udp_sender,args=(ip,port))

   thread_icmp=threading.Thread(target=icmp_receiver,args=(ip,port))

   thread_udp.daemon=True

   thread_icmp.daemon=True

   thread_icmp.start()

   time.sleep(0.1)

   thread_udp.start()

thread_icmp.join() thread_udp.join() returnqueue.get(False) if__name__=='__main__': importsys printchecker_udp(sys.argv[1],int(sys.argv[2]))

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python检测远程udp端口是否打开的方法

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