python检测远程udp端口是否打开
- 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]))
来源: http://www.phpxs.com/code/1005132/