Python获取网段内ping通IP的方法
时间：2021-02-21 14:55:20|栏目：Python代码|点击： 次
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。
