Using Python to scan Active ip addresses in a LAN

Using Python to scan Active ip addresses in a LAN

This article mainly introduces how to use Python to scan Active ip addresses in the LAN (SCAN online computers). This article provides the implementation code directly. For more information, see

Intranet hosts are automatically assigned ip addresses. Sometimes you need to check which ip addresses are in use and write a simple script.

Linux and windows can be used, with multithreading to ping1-255 all addresses, efficiency is not high, 2 minutes or so. Join and use it first.

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#-*-Coding: UTF-8 -*- # Author: orangleliu date: 2014-11-12 # Python2.7.x ip_scaner.py   ''''' Different platforms enable ip address scanning on the Intranet   Sometimes you need to know the valid ip address of the local area network, but you do not want to find a specific tool to scan. How to Use python ip_scaner.py 192.168.1.1 (The ip address 192.168.1.1-255 will be scanned) '''   Import platform Import sys Import OS Import time Import thread   Def get_ OS (): ''''' Get OS type ''' OS = platform. system () If OS = "Windows ": Return "n" Else: Return "c"   Def ping_ip (ip_str ): Cmd = ["ping", "-{op}". format (op = get_ OS ()), "1", ip_str] Output = OS. popen ("". join (cmd). readlines ()   Flag = False For line in list (output ): If not line: Continue If str (line). upper (). find ("TTL")> = 0: Flag = True Break If flag: Print "ip: % s is OK ***" % ip_str   Def find_ip (ip_prefix ): ''''' Returns the current 127.0.0, and then scans all the addresses of the entire segment. ''' For I in range (1,256 ): Ip = '% s. % s' % (ip_prefix, I) Thread. start_new_thread (ping_ip, (ip ,)) Time. sleep (0.3)   If _ name _ = "_ main __": Print "start time % s" % time. ctime () Commandargs = sys. argv [1:] Args = "". join (commandargs)   Ip_prefix = '.'. join (args. split ('.') [:-1]) Find_ip (ip_prefix) Print "end time % s" % time. ctime ()

When it is an application: python ip_scaner.py 192.168.31.1 will scan all IP addresses from 1.

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D: \ CodeHouse \ python \ tools> python ip_scaner.py 10.0.1.38 Start time Wed Nov 12 18:50:58 2014 Ip: 10.0.1.1 is OK *** Ip: 10.0.1.2 is OK *** Ip: 10.0.1.24 is OK *** Ip: 10.0.1.38 is OK *** Ip: 10.0.1.39 is OK *** End time Wed Nov 12 18:52:16 2014

That's it.