Python获取网段内ping通IP的方法

问题描述

在某些问题背景下，需要确认是否多台终端在线，也就是会使用我们牛逼的ping这个命令，做一些的ping操作，如果需要确认的设备比较少，也还能承受。倘若，在手中维护的设备很多。那么这无疑会变成一个恼人的问题。脚本的作用就凸显了。另外，我们需要使用多线程的一种措施，否则单线程很难在很短的时间内拿到统计结果。

应用背景

有多台设备需要维护，周期短，重复度高;

单台设备配备多个IP，需要经常确认网络是否通常；

等等其他需要确认网络是否畅通的地方

问题解决

使用python自带threading模块，实现多线程的并发操作。如果本机没有相关的python模块，请使用pip install package name安装之。

threading并发ping操作代码实现

这部分代码取材于网络，忘记是不是stackoverflow，这不重要，重要的是这段代码或者就有价值，代码中部分关键位置做了注释，可以自行定义IP所属的网段，以及使用的线程数量。从鄙人的观点来看是一段相当不错的代码，

# -*- coding: utf-8 -*-

import sys
import os
import platform
import subprocess
import Queue
import threading
import ipaddress
import re

def worker_func(pingArgs, pending, done):
try:
 while True:
  # Get the next address to ping.
  address = pending.get_nowait()

ping = subprocess.Popen(pingArgs + [address],
   stdout = subprocess.PIPE,
   stderr = subprocess.PIPE
  )
  out, error = ping.communicate()

if re.match(r".*, 0％ packet loss.*", out.replace("\n", "")):
   done.put(address)

# Output the result to the 'done' queue.
except Queue.Empty:
 # No more addresses.
 pass
finally:
 # Tell the main thread that a worker is about to terminate.
 done.put(None)

# The number of workers.
NUM_WORKERS = 14

plat = platform.system()
scriptDir = sys.path[0]
hosts = os.path.join(scriptDir, 'hosts.txt')

# The arguments for the 'ping', excluding the address.
if plat == "Windows":
pingArgs = ["ping", "-n", "1", "-l", "1", "-w", "100"]
elif plat == "Linux":
pingArgs = ["ping", "-c", "1", "-l", "1", "-s", "1", "-W", "1"]
else:
raise ValueError("Unknown platform")

# The queue of addresses to ping.
pending = Queue.Queue()

# The queue of results.
done = Queue.Queue()

# Create all the workers.
workers = []
for _ in range(NUM_WORKERS):
workers.append(threading.Thread(target=worker_func, args=(pingArgs, pending, done)))

# Put all the addresses into the 'pending' queue.
for ip in list(ipaddress.ip_network(u"10.69.69.0/24").hosts()):
pending.put(str(ip))

# Start all the workers.
for w in workers:
w.daemon = True
w.start()

# Print out the results as they arrive.

numTerminated = 0
while numTerminated < NUM_WORKERS:
result = done.get()
if result is None:
 # A worker is about to terminate.
 numTerminated += 1
else:
 print result # print out the ok ip

# Wait for all the workers to terminate.
for w in workers:
w.join()

使用资源池的概念，直接使用gevent这么python模块提供的相关功能。

资源池代码实现

这部分代码，是公司的一个Python方面的大师的作品，鄙人为了这个主题做了小调整。还是那句话，只要代码有价值，有生命力就是对的，就是值得的。

# -*- coding: utf-8 -*-

from gevent import subprocess
import itertools
from gevent.pool import Pool

pool = Pool(100) # concurrent action count

ips = itertools.product((10, ), (69, ), (69, ), range(1, 255))

def get_response_time(ip):
try:
 out = subprocess.check_output('ping -c 1 -W 1 {}.{}.{}.{}'.format(*ip).split())
 for line in out.splitlines():
  if '0％ packet loss' in line:
   return ip
except subprocess.CalledProcessError:
 pass

return None

resps = pool.map(get_response_time, ips)
reachable_resps = filter(lambda (ip): ip != None, resps)

for ip in reachable_resps:
print ip

github目录：git@github.com:qcq/Code.git 下的子目录utils内部。

来源：https://blog.csdn.net/u011233383/article/details/51099183