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：

复制代码 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]))