python编写的一个简单的扫描端口的程序详解编程语言

#------------------------------------------------------------------------------- 
# Name:        PortScan 
# Purpose:     扫描目标主机的端口开放情况 
# 
# Author:      xxh 
# 
# Created:     05-12-2011 
# Copyright:   (c) xxh 2011 
# Licence:     <your licence> 
#------------------------------------------------------------------------------- 
#!/usr/bin/env python 
  
import socket 
  
def main(): 
    sk = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
    sk.settimeout(1000) 
    ip=input('请输入目标主机：(默认:127.0.0.1)') 
    if ip=='': 
        ip='127.0.0.1' 
  
  
  
    s=input('请输入目标主机开始端口：(默认:80)') 
    if s=='': 
        startport=80 
    else: 
        startport=int(s) 
  
    s=input('请输入目标主机结束端口：(默认:80)') 
    if s=='': 
        endport=80 
    else: 
        endport=int(s) 
  
    for port in range(startport,endport+1): 
        print('正在扫描端口：%d' % port) 
        try: 
            sk.connect((ip,port)) 
            print('Server %s port %d OK!' % (ip,port)) 
        except Exception: 
            print('Server %s port %d is not connected!' % (ip,port)) 
    sk.close() 
  
  
if __name__ == '__main__': 
    main()