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

```
#!/usr/bin/env python
#-*- coding: utf-8 -*-

import telnetlib
import threading

def get_ip_status(key,value):
server = telnetlib.Telnet()

try:
server.open(key,value,timeout=0.1)
print('{0} port {1} is open'.format(key,value))
with open('/root/chech_ip_open.txt','a+') as f_open:
f_open.write('{0} {1}'.format(key,'
'))
except Exception as err:
print('{0}'.format(key,value))
with open('/root/chech_ip_fial.txt','a+') as f_fial:
f_fial.write('{0} {1}'.format(key,'
'))
finally:
server.close()


def check_open():
#ip = q.get_nowait()
# 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
hosts = []
with open('/root/iplist', "rb") as f:
for file_name in f:
if file_name.startswith(b'#'):
pass
elif file_name == b'':
pass
else:
ips = file_name.strip().decode()
ipt = ips.split('|')[0]
port = ips.split('|')[1]
# hosts.append(file_name.strip('|').decode())
D = {ipt: port}
hosts.append(D)
print(hosts)
for ip in hosts:
# print("2222",ip)
for key,value in ip.items():
keys=key.encode('utf8')
values=value.encode('utf8')
#print("sdsd",key,value)
get_ip_status(keys,values)

 

if __name__ == '__main__':

import os 
if os.path.exists("/root/chech_ip_open.txt"):
os.remove('/root/chech_ip_open.txt')
if os.path.exists('/root/chech_ip_fial.txt'):
os.remove('/root/chech_ip_fial.txt')
threads = []
for i in range(1):
t = threading.Thread(target=check_open)
t.start()
threads.append(t)

for t in threads:
t.join()

```