具有嵌套循环的批处理脚本，可对IP的ping范围进行嵌套 [英] Batch script with nested loops to ping range of IP's

问题描述

工作1个循环代码:

for /l %i in (1,1,254) do @ping 131.212.30.%i -n 1 -w 100 | find "Reply"

在我尝试使用计数器的地方没有运行代码，因此每次ping收到答复时，我们都会在网上添加1:

Not running code where I try to use a counter so every time the ping gets a reply we add 1 to online:

SET online=0 for /L %i in (1,1,254) do for /L %j in (1,1,255) do @ping 131.212.%i.%j -n 1 -w 100 | find "Reply" SET /A online=online+1

非常感谢.

推荐答案

Reply from 146.57.239.18: Destination host unreachable 

目的地不可达，因此您的本地主机(146.57.239.18)答复目的地主机不可达".

The destination is not reachable, so your local host (146.57.239.18) replies with "Destination host unreachable").

146.57.239.18不是ping通的主机，而是您的本地主机.

146.57.239.18 is not the pinged host, but your localhost.

最好搜索TTL=而不是Reply:

...
ping 131.212.%%i.%%j -n 1 -w 100 | find "TTL="
...

您的set /a online=%online%+1也不起作用.您需要延迟扩展. set /a online +=1语法效果更好:

Also your set /a online=%online%+1 doesn't work. You would need delayed expansion. The set /a online +=1 syntax works better:

...
ping 131.212.%%i.%%j -n 1 -w 100 | find "TTL=" && SET /A online +=1 || set /a offline +=1
...

结果，整个代码如下:

SET online=0 
for /L %%i in (1,1,254) do for /L %%j in (1,1,255) do ping 131.212.%%i.%%j -n 1 -w 100 | find "TTL=" && SET /A online +=1 
echo %online% hosts are online.

编辑是一种更快的解决方案(并行工作):

EDIT a much quicker solution (working parallel):

@echo off 
SET online=0 
for /L %%i in (1,1,254) do (
  start /min "pinging" cmd /c "(@for /L %%j in (1,1,255) do @ping 146.254.%%i.%%j -n 1 -w 100 | find "TTL=") >ping%%i.txt"
)

:loop
timeout /t 1 >nul
tasklist /v | find "pinging" && goto :loop
pause

for /f %%i in ('type ping*.txt 2^>nul^|find /c "TTL="') do echo %%i hosts are online
del ping*.txt

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