@echo off
echo start %date%  %time%>>log.txt
set ip=192.168.1.1

:start
ping %ip% -w 50 -n 1 >nul
IF %ERRORLEVEL% EQU 1 goto error1
IF %ERRORLEVEL% EQU 0 goto start

:error1
ping %ip% -w 50 -n 1 >nul
IF %ERRORLEVEL% EQU 1 goto error2
IF %ERRORLEVEL% EQU 0 goto start

:error2
ping %ip% -w 50 -n 1 >nul
IF %ERRORLEVEL% EQU 1 goto end
IF %ERRORLEVEL% EQU 0 goto start

:end
echo end %date%  %time%>>log.txt
exit
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set n=0
:m
call:Network_Check
if defined $Network_Check (set "n=0")else (set/a "n+=1")
if %n% equ 0 (
  echo,网络正常: %Date% %Time%
)else if %n% geq 3 (set "n=3"
  echo,网络异常: %Date% %Time%
)else (
  echo,网络丢包: %Date% %Time%
)
goto:m
:Network_Check
rem:网络检查
set "$Network_Check="&&for /f "delims=" %%p in ('ping.exe /n 2 "192.168.1.1"')do for %%q in (%%p)do if /i "%%q"=="ttl" set "$Network_Check=%%~p"
goto:eof
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