导语欢迎关注我的编程栈，在这里你将循序渐进的学到python相关知识，如：爬虫、web框架，数据库，web前端等。不需要你转发+评论什么的发资料，我也没有什么资料给你，你跟着文章敲代码即可。我目前是51CTO微职位辅导老师，如果您想系统的学习也可以联系我，当然，你也可以忽视这条广告如果你觉得文章对你有帮助：感谢关注我。我们常常说python无所不能，今天教大家使用多线程写一个端口扫描工具依赖socket或telnetlib，程序默认使用telnetlib，可选socket知识点：多线程、网络、简单正则、另一种错误处理（见check_ip方法）废话不多说，上代码

import socket,threading,reimport telnetlib# python的内置模块telnetlib也可以完成端口检测任务# 强大的第三方包python-nmap也能完成from concurrent.futures import ThreadPoolExecutor,waitclass CheckPort(object): ''' 检查网段端口 ''' def __init__(self,conn_type='telent',scan_type='custom'): ''' conn_type 扫描时，连接端口的方式，可选：socket telent scan_type 扫描方式，custom 自定义（自行输入网段和端口），auto(输入网段后，自动扫描常用端口) ''' self.open_port_dict = {} # 保存扫描到的开放端口 if scan_type == 'custom': self.check_port_list = [] elif scan_type == 'auto': self.check_port_list = [21,22,23,25,42,69,79,80,88,110,113,119,135,220,389,443,636,993,1433,4000,8000,8080] elif scan_type == 'easy': self.check_port_list = [21,22,23,80,443,1433,4000,8000,8080] else: print(f'[405]{self.errmsg(405)}') exit() if conn_type == 'telent': self.scan_func = self.port_by_telent elif conn_type == 'socket': self.scan_func = self.port_by_socket else: print(f'[404]{self.errmsg(404)}') exit() self.scan_type = scan_type self.star_ip = '' self.end_ip = '' self.ip_list = [] self.input_ip() def input_ip(self): flag = True while flag: self.star_ip = input('请输入网段起始IP：') if self.star_ip.upper() == 'Q': exit() self.end_ip = input('请输入网段结束IP：') if self.end_ip.upper() == 'Q': exit() check = self.check_ip(self.star_ip,self.end_ip) if check == 0: flag = False if self.scan_type == 'custom': self.input_port() else: print(f'[{check}]{self.errmsg(check)}') def input_port(self): flag = True while flag: port = input('请输入要检查的端口：').strip() port = port.replace(' ',',') port = port.replace('，',',') port_list = self.re_port(port.split(',')) if port_list == 203: continue else: self.check_port_list = port_list flag = False  def re_port(self,port_list): temp_port = [] for port in port_list: if port.strip().isdigit(): if int(port.strip()) < 65535 and int(port.strip()) > 1: temp_port.append(int(port.strip())) else: print(f'[201]{self.errmsg(201)}-去除[{port}]端口检测') else: print(f'[202]{self.errmsg(202)}-去除[{port}]端口检测') if len(temp_port) < 1: res = 203 else: res = temp_port return res  def check_ip(self,star_ip,end_ip): ''' 检查IP格式和网段是否正确 @return errcode ''' errcode = 0 pattern = "^(1\\d{2}|2[0-4]\\d|25[0-5]|[1-9]\\d|[1-9])\\.(1\\d{2}|2[0-4]\\d|25[0-5]|[1-9]\\d|\\d)\\.(1\\d{2}|2[0-4]\\d|25[0-5]|[1-9]\\d|\\d)\\.(1\\d{2}|2[0-4]\\d|25[0-5]|[1-9]\\d|\\d)$" if re.match(pattern,star_ip) == None: errcode = 100 return errcode if re.match(pattern,end_ip) == None: errcode = 100 return errcode star_seg = star_ip.split('.') end_seg = end_ip.split('.') if star_seg[0] == end_seg[0] and star_seg[1] == end_seg[1] and star_seg[2] == end_seg[2]: self.ip_list = [f'{star_seg[0]}.{star_seg[1]}.{star_seg[2]}',int(star_seg[3]),int(end_seg[3])] return errcode else: errcode = 101 return errcode  def port_by_socket(self,ip,port): s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) # s.timeout = 5 # 设置超时 try: s.connect((ip,port)) except Exception as e: print(f'[{ip}]:[{port}]未开启') # print(e) else: print(f'{ip}:{port} 开启') self.open_port_dict[ip].append(port) finally: s.close()  def port_by_telent(self,ip,port): server = telnetlib.Telnet() # 创建一个Telnet对象 try: server.open(ip,port) # 利用Telnet对象的open方法进行tcp链接 print(f'{ip}:{port} 开启') self.open_port_dict[ip].append(port) except Exception as err: print(f'[{ip}]:[{port}]未开启') finally: server.close()  def multi_run(self,threads = 5): ''' threads 线程数量 ''' pool = ThreadPoolExecutor(threads) futures = [] for i in range(self.ip_list[1],self.ip_list[2] + 1): ip = f'{self.ip_list[0]}.{i}' self.open_port_dict[ip] = [] for port in self.check_port_list: f = pool.submit(self.scan_func,ip,port) futures.append(f) # print(f) wait(futures,timeout=None,return_when='ALL_COMPLETED') # self.show_port()  def show_port(self): print(self.open_port_dict) for key in self.open_port_dict: print(f'{key}开放如下端口') for port in self.open_port_dict[key]: print(port)  def errmsg(self,errcode): err_dict = { 0:'ok', 100:'IP格式错误', 101:'IP网段错误', 201:'超出端口范围', 202:'端口格式错误，应为整数', 203:'无可检测端口，请重新输入', 404:'扫描方式错误', 405:'扫描类型错误' } return err_dict[errcode]cp = CheckPort(conn_type='socket') # 实例化工具cp.multi_run() # 多线程扫描cp.show_port()

结语到这里，如果你认真阅读这篇文章，且认真的自己敲了一遍，你已经学会了一个python高级脚本啦看不懂？没关系，我的系列教程还没开始讲多线程的东西，这篇是给基础稍好的同学热热手，持续关注我，你会学到更多哦如果你觉得我的文章对你有用，请关注+收藏+分享哦你有python学习过程中的问题可以评论留言或私信我共同探讨~