function – 批处理脚本中的IP验证 – 先通过findstr匹配,然后通

在几个地方可以找到findstr表达式,以识别匹配四个数字序列的数字字符串.

findstr /r "[0-9][0-9]*.[0-9][0-9]*.[0-9][0-9]*.[0-9][0-9]*"

虽然似乎没有更好的方法来识别字符串本身(因为对于findstr的正则表达式支持有限),但它会捕获过于误报,如1234.2.3.4或999.999.999.999,当然还有0.0.0.0.

它“仅”需要进一步验证找到的字符串,例如使用for循环序列,并且`make shure每个找到的字符串八位字节对IP规则有效.

> 1到254之间的第一个八位字节
>第二和
>介于0和255之间的第三个
>介于1和254之间

如果有人将第二部分验证集成到此代码中以进一步确定是否发现IP是3个私有类之一(10.0.0.0/8,172.16.0.0/12和192.168.0.0/16或者是其中之一) ：10.0.0.0到10.255.255.255,172.16.0.0到172.31.255.255和192.168.0.0到192.168.255.255)这将成为一个圆函数.并且不要忘记特殊的127.x.x.x必须得到警告D).

要使IP4完成一个交换机,以选择是否应验证私有IP或公共IP,并且返回值可以告知更接近哪种类型甚至子网掩码已被识别：

>第一个八位字节必须是255
>第二和
>第三和
> 0,128,192,224,240,248,252,254,255中的第四个

总的来说这将是伪例程：

一个函数接受输入,无论来自哪里,只是被调用,接受使用和返回结果的开关

> take用于私有或公共IP范围的交换机
>验证IP语法

> IP验证 – 识别范围和设置返回值

>私人或
> pulic类
>子网
> ……

>设置returnvalue,根据开关设置errorlevel

如果代码确实设置了很好的可用返回代码(例如,返回识别的ip范围),那么对于每个处理IP4的人来说,这将是一个alltime函数.虽然我将自己扩展这些ip范围,但如果只是函数将可靠地返回那些“_return”值,例如示例代码.

我忘了什么吗？

还没有人编码吗？

解：
根据MC ND的示例和Aacini的交换机处理和子网掩码代码,我搞砸了代码,添加了错误处理使用回声和其他情况 – 这里包含一些测试示例代码：

@echo off
          setlocal enableextensions enabledelayedexpansion

          rem try some ip addresses 
          for %%i in ("1.2.3.4" "0.1.2.3" "250.1024.1.2" "10.0.2.1" "127.0.0.1" "1.2.3.255" "172.16.17.18" "192.168.1.1" "255.128.240.0" "0.0.0.0" "something" "" ) do (
          REM 1.2.3.4 is public / 0.1.2.3 is false all / 10.0.2.1 is private / 127.0.0.1 is local / 172.16.17.18 is private / 192.168.1.1 is private / 255.128.240.0 is subnet / 0.0.0.0 is false all (source net)


              echo --------------- run one as default case assuming pulic with ret var -------------------

              rem call default with a return variable 
              call :validateIP %%~i ret && echo %%i is valid || echo %%i is invalid
              echo return value: !ret!
              echo --------------------------------------------

              echo --------------- run two with switch public -------------------

              rem call with switch public 
              call :validateIP %%~i /public && echo %%i is valid || echo %%i is invalid
              echo return value: !ret!
              echo --------------------------------------------

              echo ------------ run three with switch private ---------------------
              rem call with switch private 
              call :validateIP %%~i /private && echo %%i is valid || echo %%i is invalid
              echo return value: !ret!
              echo --------------------------------------------

              echo ------------ run four with switch private and ret variable ---------------------
              rem call with switch private and return variable
              call :validateIP %%~i /private ret && echo %%i is valid || echo %%i is invalid
              echo return value: !ret!
              echo --------------------------------------------

              echo ------------ run five with switch local and ret variable ---------------------
              rem call with switch private and return variable
              call :validateIP %%~i /local ret && echo %%i is valid || echo %%i is invalid
              echo return value: !ret!
              echo --------------------------------------------

              echo ------------ run six with switch subnet and ret variable ---------------------
              rem call with switch private and return variable
              call :validateIP %%~i /subnet ret && echo %%i is valid || echo %%i is invalid
              echo return value: !ret!
              echo --------------------------------------------

              echo ------------ run seven with switch source and ret variable ---------------------
              rem call with switch private and return variable
              call :validateIP %%~i /source ret && echo %%i is valid || echo %%i is invalid
              echo return value: !ret!
              echo --------------------------------------------

              echo ------------ run eight with nothing ---------------------
              rem call with switch private and return variable
              call :validateIP && echo is valid || echo is invalid
              echo return value: !ret!
              echo --------------------------------------------

          )   
          exit /b 


 :validateIP ipAddress [/ipRange] [returnVariable]

  rem prepare environment
  setlocal enableextensions enabledelayedexpansion 


  if "%~1"=="" goto USAGE
  echo %~1| findstr /b /e /r "[0-9][0-9]*.[0-9][0-9]*.[0-9][0-9]*.[0-9][0-9]*" >nul
  if errorlevel 1 goto USAGE
  :afterusage

  rem Initialize ip range as public
  set "ipCASE=public"

  rem Process switches
  set "returnVar=%~2"
  rem If second parameter start with slash...
  if "%returnVar:~0,1%" equ "/" (
      rem It is the /ipRange
      set "ipCASE=%returnVar:~1%"
      set "returnVar=%~3"
  )

  rem asume failure in tests : 0=pass 1=fail : same for return/errorlevel
  set "_return=1"
  set "_returnlevel=1"
  set "subNETNumbers=0,255"

  rem test if address conforms to ip address structure
  echo %~1| findstr /b /e /r "[0-9][0-9]*.[0-9][0-9]*.[0-9][0-9]*.[0-9][0-9]*" >nul

  rem if it conforms to structure,test each octet for range values
  if not errorlevel 1 for /f "tokens=1-4 delims=." %%a in ("%~1") do (
      if %%a gtr 0 if %%a lss 255 if %%b leq 255 if %%c leq 255 if %%d gtr 0 if %%d leq 254 set "_return=public"
      if %%a equ 10 if %%b geq 0 if %%b lss 255 if %%c geq 0 if %%c lss 255 if %%d gtr 0 if %%d leq 254 set "_return=private"
      if %%a equ 172 if %%b geq 16 if %%b lss 31 if %%c geq 0 if %%c lss 255 if %%d gtr 0 if %%d leq 254 set "_return=private"
      if %%a equ 192 if %%b equ 168 if %%c geq 0 if %%c lss 255 if %%d gtr 0 if %%d leq 254 set "_return=private"
      if %%a equ 127 if %%b geq 0 if %%b lss 255 if %%c geq 0 if %%c lss 255 if %%d gtr 0 if %%d leq 254 set "_return=local"
      if %%a equ 255 if not "!subNETNumbers:%%b=!" equ "%subNETNumbers%" if not "!subNETNumbers:%%c=!" equ "%subNETNumbers%" if not "!subNETNumbers:%%d=!" equ "%subNETNumbers%" set "_return=subnetmask"
      if %%a equ 0 set "_return=sourcenetwork"
  )

  rem set returnlevels depending on given switch
  if "%ipCASE%"=="public"  if "%_return%"=="public"  (set "_returnlevel=0") else (set "_returnlevel=1")

  if "%ipCASE%"=="private" if "%_return%"=="private" (set "_returnlevel=0") else (set "_returnlevel=1")

  if "%ipCASE%"=="local" if "%_return%"=="local" (set "_returnlevel=0") else (set "_returnlevel=1")

  if "%ipCASE%"=="subnet" if "%_return%"=="subnetmask" (set "_returnlevel=0") else (set "_returnlevel=1")

  if "%ipCASE%"=="source" if "%_return%"=="sourcenetwork" (set "_returnlevel=0") else (set "_returnlevel=1")

  REM OPTION1 set errorlevel
  REM another correct way to set errorlevel would be to REM this line beneath and instead use _returnlevel with exit /b like in line REM OPTION2 - while this is interesting way to set it indirectly
  if "%_returnlevel%"=="0" (ver > nul) else (set dummy 2> nul)


  :endValidateIP
  rem clean and return data/errorlevel to caller
  endlocal & ( if not "%returnVar%"=="" set "%returnVar%=%_return%" ) & exit /b 
  REM OPTION2 endlocal & ( if not "%returnVar%"=="" set "%returnVar%=%_return%" ) & exit /b %_returnlevel%  

  :usage
  echo.
  echo   Usage:  call :validateIP [/ipRange] [returnVariable]
  echo.   
  echo        for example: call :validateIP 127.0.0.2 /local ret 
  echo.   
  echo     if NO switch is given function assumes public,echo     switch and return var are optional
  echo     errorlevel depends and corresponds on given switch
  echo     known switches: /public,/private,/local,/subnet,/source
  echo     return var reflects syntax check,if return var is "1" the input was malformed anyhow
  echo.
  goto :afterusage