python3下使用telnetlib模块连接网络设备

标签：orm   设备   without   lib   comm   split   arch   timeout   dict   

问题提示如下：

import telnetlib
Host = "10.10.10.10"
# 连接Telnet服务器
tn = telnetlib.Telnet(Host, port=23, timeout=10)
tn.set_debuglevel(0)

# 输入登录用户名
tn.read_until(b‘login: ‘)
tn.write(b"admin" + b‘\n‘)

# 输入登录密码
tn.read_until(b‘Password: ‘)
tn.write(b"Admin@1234" + b‘\n‘)

tn.read_until(b‘#‘)
tn.write(b"cd /home/sd" + b‘\n‘)

tn.read_until(b‘#‘)
tn.write(b"ls -al" + b‘\n‘)

r = tn.read_until(b‘#‘).decode(‘ASCII‘)
r1 = r.split(r"\r\n")
for i in r1:
    print(i)

tn.close()

以下是设备实例：

>>> tn=telnetlib.Telnet("10.10.0.6",timeout=2)
>>> tn.read_until(b‘login: ‘,timeout=2)
b"\r\n******************************************************************
****\r\n* Copyright (c) 2004-2018 New H3C Technologies Co., Ltd. All rig
rved.*\r\n* Without the owner‘s prior written consent,
       *\r\n* no decompiling or reverse-engineering shall be allowed.
         *\r\n**********************************************************
************\r\n\r\nlogin: "
>>> tn.write(b‘admin‘+b‘\n‘)
>>> tn.read_until(b‘Password: ‘,timeout=2)
b‘jgtl\r\r\nPassword: ‘
>>> tn.write(b‘Admin@123‘+b‘\n‘)
>>> tn.read_until(b‘>‘)
b‘\r\n<bangong-01>‘
>>> tn.write(b‘ping 10.10.0.7‘)
>>> tn.read_until(b‘>‘)

以上是命令行执行的过程。写成脚本需要考虑两个问题，一个是变量的替换如何编码解封，一个是输出结果加解码

#-*- coding:utf-8 -*-
import telnetlib
import re
import csv
import sys
import time
from datetime import datetime

host_dict={
    "ip":"10.10.0.6",
    "user":"admin",
    "pwd":"Admin@123"
}

def get_loss(addrlist):
    host=host_dict["ip"]
    user=host_dict["user"]
    pwd=host_dict["pwd"]
    print (host)
    resultlist = []
    #try:
    tn = telnetlib.Telnet(host, timeout=2)
    print ("AA")
    if len(host_dict["pwd"]) and len(host_dict["user"]):
        print ("BB")
        tn.read_until(b"login: ", timeout=3)
        #tn.write(b"admin"+b"\n")
        tn.write(user.encode()+b"\n")
        tn.read_until(b"Password: ", timeout=3)
        #tn.write(b"Admin@123"+b"\n")
        tn.write(pwd.encode()+ b"\n")
        # p_error = re.compile("found at")

    if tn.read_until(b">", timeout=4).find(b">") != -1:
        print("Connect to {host} ...... ".format(host=host))
        tn.write(b"ping 127.0.0.1\n")
        print (tn.read_until(b‘01>‘))
    else:
        print("%s Wrong username or password!!!" % host)
        return ""
    #tn.read_until(b">")

    if len(addrlist) != 0:
        for i in range(len(addrlist)-1):
            tep = {}
            command = "ping " + addrlist[i]
            print("command:", command)
            tn.write(command.encode() + b"\n")
            result = str(tn.read_until(b"01>"))
            print(result)
            re_loss = re.compile("\d+\.\d+%")
            loss = re_loss.findall(result)
            tep[host] = loss[0]
            resultlist.append(tep)
            #if p_error.search(result.decode()):
            #    print("There is a error in this command: {0}".format(c.decode()))
    tn.close()
    #except Exception as e:
        #if e:
        #    print ("Connect to {host} Failed!!!".format(host=host),e)
        #return ""
    return resultlist

if __name__=="__main__":
    addrlist=[‘10.10.0.2‘,‘10.10.0.5‘]
    print ("get_loss",get_loss(addrlist))

python3下使用telnetlib模块连接网络设备

标签：orm   设备   without   lib   comm   split   arch   timeout   dict   

原文地址：https://blog.51cto.com/chier11/2530085