Multiple ping script in Python

Question

I m unable to find any good easy to learn documentation on python and networking   In this instance  I m just trying to make a easy script which I can ping a number of remote machines   for ping in range 1 10      ip  127 0 0   str ping     os system  ping -c 3  s    ip    A simple script like that will ping the machines fine  but I d like to get the script to returns  active   no response   Which makes me think I ll have to look up the time module as well  I think time sleep 5  and after that  there would be a break statement  Which makes me think there should be a while loop inside for  I m not 100  sure  I could be going in the wrong direction completely    if anyone could help or point me in the direction of some documentation that d be great

User · Answer

To ping several hosts at once you could use subprocess.Popen():

#!/usr/bin/env python3
import os
import time
from subprocess import Popen, DEVNULL

p = {} # ip -> process
for n in range(1, 100): # start ping processes
    ip = "127.0.0.%d" % n
    p[ip] = Popen(['ping', '-n', '-w5', '-c3', ip], stdout=DEVNULL)
    #NOTE: you could set stderr=subprocess.STDOUT to ignore stderr also

while p:
    for ip, proc in p.items():
        if proc.poll() is not None: # ping finished
            del p[ip] # remove from the process list
            if proc.returncode == 0:
                print('%s active' % ip)
            elif proc.returncode == 1:
                print('%s no response' % ip)
            else:
                print('%s error' % ip)
            break

If you can run as a root you could use a pure Python ping script or scapy:

from scapy.all import sr, ICMP, IP, L3RawSocket, conf

conf.L3socket = L3RawSocket # for loopback interface
ans, unans = sr(IP(dst="127.0.0.1-99")/ICMP(), verbose=0) # make requests
ans.summary(lambda (s,r): r.sprintf("%IP.src% is alive"))

User · Answer

Try subprocess call  It saves the return value of the program that was used   According to my ping manual  it returns 0 on success  2 when pings were sent but no reply was received and any other value indicates an error     typo error in import import subprocess  for ping in range 1 10       address    127 0 0     str ping      res   subprocess call   ping    -c    3   address       if res    0          print  ping to   address   OK      elif res    2          print  no response from   address     else          print  ping to   address   failed

User · Answer

This script   import subprocess import os with open os devnull   wb   as limbo          for n in xrange 1  10                   ip  192 168 0  0   format n                  result subprocess Popen   ping    -c    1    -n    -W    2   ip                           stdout limbo  stderr limbo  wait                   if result                          print ip   inactive                  else                          print ip   active    will produce something like this output   192 168 0 1 active 192 168 0 2 active 192 168 0 3 inactive 192 168 0 4 inactive 192 168 0 5 inactive 192 168 0 6 inactive 192 168 0 7 active 192 168 0 8 inactive 192 168 0 9 inactive   You can capture the output if you replace limbo with subprocess PIPE and use communicate   on the Popen object   p Popen        output p communicate   result p wait     This way you get the return value of the command and can capture the text  Following the manual this is the preferred way to operate a subprocess if you need flexibility      The underlying process creation and management in this module is   handled by the Popen class  It offers a lot of flexibility so that   developers are able to handle the less common cases not covered by the   convenience functions

User · Answer

Thank you so much for this   I have modified it to work with Windows   I have also put a low timeout so  the IP s that have no return will not sit and wait for 5 seconds each   This is from hochl source code   import subprocess import os with open os devnull   wb   as limbo          for n in xrange 200  240                   ip  10 2 7  0   format n                  result subprocess Popen   ping    -n    1    -w    200   ip                           stdout limbo  stderr limbo  wait                   if result                          print ip   inactive                  else                          print ip   active    Just change the ip  for your scheme and the xrange for the hosts

User · Answer

import subprocess os threading time from queue import Queue lock threading Lock    start time time   def check n       with open os devnull   wb   as limbo                  ip  192 168 21  0   format n                  result subprocess Popen   ping    -n    1    -w    300   ip  stdout limbo  stderr limbo  wait                   with lock                                          if not result                          print  ip   active                                           else                          pass                          def threader        while True          worker q get           check worker          q task done   q Queue    for x in range 255       t threading Thread target threader      t daemon True     t start   for worker in range 1 255       q put worker  q join   print  Process completed in    time time  - start    I think this will be better one

User · Answer

I m a beginner and wrote a script to ping multiple hosts To ping multiple host you can use ipaddress module    import ipaddress from subprocess import Popen  PIPE  net4   ipaddress ip network  192 168 2 0 24   for x in net4 hosts        x   str x      hostup   Popen   ping    -c1   x   stdout PIPE      output   hostup communicate   0      val1   hostup returncode  if val1    0      print x   is pinging    else      print x   is not responding

User · Answer

Python actually has a really sweet method that will  return an iterator over the usable hosts in the network    setting strict to false iterates over all IPs   For example   import subprocess import ipaddress  subnet   ipaddress ip network  192 168 1 0 24   strict False  for i in subnet hosts        i   str i      subprocess call   ping    -c1    -n    -i0 1    -W1   i     The wait interval  -i0 1  may be important for automations  even a one second timeout  -t1  can take forever over a  0 24  EDIT  So  in order to track ICMP  ping  requests  we can do something like this      usr bin env python  import subprocess import ipaddress  alive      subnet   ipaddress ip network  192 168 1 0 23   strict False  for i in subnet hosts        i   str i      retval   subprocess call   ping    -c1    -n    -i0 1    -W1   i       if retval    0          alive append i  for ip in alive      print ip     is alive      Which will return something like   192 168 0 1 is alive 192 168 0 2 is alive 192 168 1 1 is alive 192 168 1 246 is alive   i e  all of the IPs responding to ICMP ranging over an entire  23-- Pretty cool

User · Answer

I have done a few modifications in the above code with multithreading in python 2 7  import subprocess os threading time import Queue  lock threading Lock    start time time   def check n       with open os devnull   quot wb quot   as limbo                  ip n                 result subprocess Popen   quot ping quot    quot -n quot    quot 2 quot    quot -w quot    quot 300 quot   ip  stdout limbo  stderr limbo  wait                   with lock                      if not result                          print ip   quot active quot                      else                          print ip   quot Inactive quot   def threader        while True          worker q get           check worker          q task done   q   Queue Queue    for x in range 255       t threading Thread target threader      t daemon True     t start    ip     quot 13 45 23 523 quot    quot 13 35 23 523 quot   quot 23 23 56 346 quot   for worker in ip      q put worker  q join   print  quot Process completed in   quot  time time  - start

User · Answer

import subprocess import os     servers txt contains ip address in following format 192 168 1 1 192 168 1 2         with open  servers txt    r   as f          for ip in f              result subprocess Popen   ping    -c    1    -n    -W    2      ip  stdout f  stderr f  wait               if result                  print ip   inactive               else                  print ip   active

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