python telnetlib 模块实现功能端口扫描

# python telnetlib 模块
## 实现功能端口扫描
- 功能1 将开放的端口和失败的端口写入到各自的文件中
- 功能2 先删除创建的文件

 1 ```
 2 #!/usr/bin/env python
 3 #-*- coding: utf-8 -*-
 4 
 5 import telnetlib
 6 import threading
 7 
 8 def get_ip_status(key,value):
 9 server = telnetlib.Telnet()
10 
11 try:
12 server.open(key,value,timeout=0.1)
13 print('{0} port {1} is open'.format(key,value))
14 with open('/root/chech_ip_open.txt','a+') as f_open:
15 f_open.write('{0} {1}'.format(key,'
'))
16 except Exception as err:
17 print('{0}'.format(key,value))
18 with open('/root/chech_ip_fial.txt','a+') as f_fial:
19 f_fial.write('{0} {1}'.format(key,'
'))
20 finally:
21 server.close()
22 
23 
24 def check_open():
25 #ip = q.get_nowait()
26 # 这里模拟多IP地址的情况，也可以从文件中读取IP??list,改成json格式
27 hosts = []
28 with open('/root/iplist', "rb") as f:
29 for file_name in f:
30 if file_name.startswith(b'#'):
31 pass
32 elif file_name == b'':
33 pass
34 else:
35 ips = file_name.strip().decode()
36 ipt = ips.split('|')[0]
37 port = ips.split('|')[1]
38 # hosts.append(file_name.strip('|').decode())
39 D = {ipt: port}
40 hosts.append(D)
41 print(hosts)
42 for ip in hosts:
43 # print("2222",ip)
44 for key,value in ip.items():
45 keys=key.encode('utf8')
46 values=value.encode('utf8')
47 #print("sdsd",key,value)
48 get_ip_status(keys,values)
49 
50  
51 
52 if __name__ == '__main__':
53 
54 import os 
55 if os.path.exists("/root/chech_ip_open.txt"):
56 os.remove('/root/chech_ip_open.txt')
57 if os.path.exists('/root/chech_ip_fial.txt'):
58 os.remove('/root/chech_ip_fial.txt')
59 threads = []
60 for i in range(1):
61 t = threading.Thread(target=check_open)
62 t.start()
63 threads.append(t)
64 
65 for t in threads:
66 t.join()
67 
68 ```