DHCP sniff python3

Question

我已经看到了这个视频https://www.youtube.com/watch?v=imN-vhi5ZWQ&t=82s&ab_channel=KalleHallden，并且我已经尝试了这个代码用于DHCP SNIFF。

import sys
import subprocess
import os
from decouple import config

IP_NETWORK = config('IP_NETWORK')
IP_DEVICE = config('IP_DEVICE')

proc = subprocess.Popen(['ping', IP_NETWORK], stdout=subprocess.PIPE)

while True:
    line = proc.stdout.readline()
    if not line:
        break
    connected_ip = line.decode('utf-8').split[3]

    if connected_ip == IP_DEVICE:
        subprocess.Popen(['say', 'saar is home'])

当我尝试运行它时，我得到了这个错误

Traceback (most recent call last):
  File "netsniff.py", line 6, in <module>
    IP_NETWORK = config('IP_NETWORK')
  File "/home/codeterminal/anaconda3/lib/python3.8/site-packages/decouple.py", line 199, in __call__
    return self.config(*args, **kwargs)
  File "/home/codeterminal/anaconda3/lib/python3.8/site-packages/decouple.py", line 83, in __call__
    return self.get(*args, **kwargs)
  File "/home/codeterminal/anaconda3/lib/python3.8/site-packages/decouple.py", line 68, in get
    raise UndefinedValueError('{} not found. Declare it as envvar or define a default value.'.format(option))
decouple.UndefinedValueError: IP_NETWORK not found. Declare it as envvar or define a default value.

Answer 1

我认为IP_NETWORK应该被定义为一个环境变量，并传递给你的python进程，例如：

IP_NETWORK=<your value here> python sniff.py