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：
代码如下:
import socket
import threading
import time
import struct
import queue
queue = queue.queue()
def udp_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
def icmp_receiver(ip,port):
    icmp = socket.getprotobyname(icmp)
    try:
        sock_icmp = socket.socket(socket.af_inet, socket.sock_raw, icmp)
    except socket.error, (errno, msg):
        if errno == 1:
            # operation not permitted
            msg = msg + (
                - note that icmp messages can only be sent from processes
                running as root.
            )
            raise socket.error(msg)
        raise # raise the original error
    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()
    if code == 3 and icmpport == port and addr[0] == ip:
        queue.put(false)
    return
def checker_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()
    return queue.get(false)
if __name__ == '__main__':
    import sys
    print checker_udp(sys.argv[1],int(sys.argv[2]))
希望本文所述对大家的python程序设计有所帮助。