python检测远程udp端口是否打开的方法
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]))