@ECHO OFF
:: This will add an ipv4 entry to the hosts file, redirecting ipv6 requests to ipv4
:: This must be run as administrator
SET domain=apollo.rip
SET NEWLINE=^& echo.
SET hostsfile="%WINDIR%system32driversetchosts"

:: check if you set the domain
IF %domain%  EQU ididntsetthis (
    ECHO ERROR: You didn't set the domain in this file. Change "ididntsetthis" to some domain.
    ECHO i.e. SET domain=google.com
    goto:eof
)

:: check if administrater
NET SESSION >nul 2>&1
IF NOT %ERRORLEVEL%  EQU 0 (
    ECHO ERROR: You didn't run this script with administrative privleges.
    ECHO It will not be able to write to the hosts file.
    goto:eof
)

:: get ipv4 address
FOR /f "tokens=1,3 delims=: " %%A IN ('ping -n 1 %domain% -4'') DO IF %%A==Reply SET ipaddress=%%B

ECHO Uupdating the following to hosts file

:: remove existing entry
findstr /v %domain% %hostsfile% > %hostsfile%.tmp
move /Y %hostsfile%.tmp %hostsfile%

:: append hosts file
FIND /C /I "%domain%" %hostsfile%
IF %ERRORLEVEL% NEQ 0 ECHO %NEWLINE%^%ipaddress% %domain% >> %hostsfile%

ECHO Hosts updated with %ipaddress%	%domain%