Example of multi-threaded port scanning function implemented in python

The example in this article describes the multi-threaded port scanning function implemented in python. Share it with everyone for your reference, the details are as follows:

The following program gives the Python code for multi-thread scanning of a given IP host

#!/usr/bin/env python
#encoding: utf-8
import socket, sys, thread, time
openPortNum = 0
socket.setdefaulttimeout(3)
def usage():
  print '''''Usage:
  Scan the port of one IP: python port_scan_multithread.py -o <ip>
  Scan the port of one IP: python port_scan_multithread.py -m <ip1, ip2, ip3, ip4 ...>
  &#39;&#39;&#39;
  print &#39;Exit&#39;
  sys.exit(1)
def socket_port(ip, PORT):
  global openPortNum
  if PORT > 65535:
    print &#39;Port scanning beyond the port range, interrupt to scan&#39;
    sys.exit(1)
  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
  result = s.connect_ex((ip, PORT))
  if(result == 0):
    print ip, PORT,&#39;is open&#39;
    openPortNum += 1
  s.close()
def start_scan(IP):
  for port in range(0, 65535+1):
    thread.start_new_thread(socket_port, (IP, int(port)))
    time.sleep(0.006)
if __name__ == &#39;__main__&#39;:
  t = 0
  if len(sys.argv)<2 or sys.argv[1] == &#39;-h&#39;:
    usage()
  elif sys.argv[1] == &#39;-o&#39;:
    ONE_IP = raw_input(&#39;Please input ip of scanning: &#39;)
    t = time.time()
    start_scan(ONE_IP)
  elif sys.argv[1] == &#39;-m&#39;:
    MANY_IP = raw_input(&#39;Please input many ip of scanning: &#39;)
    IP_SEG = MANY_IP.split(&#39;,&#39;)
    t = time.time()
    for i in IP_SEG:
      start_scan(i)
  print
  print &#39;total open port is %s, scan used time is: %f &#39; % (openPortNum, time.time()-t)

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