Batch file to update endpoint and create tunnel - no external dependencies

[LumKitty]

Apologies if this has been done before, but I've been working on a little script that will both create an IPv6 tunnel, and update the endpoint automatically.

Key features:

• No external dependencies (e.g. wget) uses only commands built into windows
• Update endpoint only if needed
• Update endpoint over SSL
• Don't create tunnel if only the endpoint needed changing
• Do nothing if IPv6 is working
• Aims to be idiot proof

It needs to run as admin, so to run at startup do this.

The aim is to be something you can just drop on the computer of a clueless friend or relative and forget about.

ToDo: Find a way to detect if native IPv6 becomes available and disable the tunnels, unfortunately I don't have native IPv6 available anywhere to test with.

Screenshot:

Code Select Expand

@echo off

SET TunnelServer=IP of tunnel server
SET Tunnel=Put your /64 here
SET TunnelID=Found on the tunnel detailspage
SET TunnelKey=MD5 hashof your tunnel update key
SET UserID=Found on the main page below your real name

call:CheckIPv6||exit /b 0

if "%TunnelServer%"=="IP of tunnel server" (
    start notepad %0
    exit /b 1
)

set OldIPFile=%0\..\OldIP.txt
set UpdateResultFile=%temp%\output.txt
set EndPointUpdated=0

for /f "tokens=1-2 delims=:" %%a in ('ipconfig^|find "IPv4"') do set ip=%%b
for /f "tokens=* delims= " %%a in ("%IP%") do set IP=%%a

for /f "delims=: tokens=2" %%a in ('nslookup myip.opendns.com resolver1.opendns.com 2^>nul ^| findstr "Address"') do (set ExternalIP=%%a)
for /f "tokens=* delims= " %%a in ("%ExternalIP%") do set ExternalIP=%%a

set OldIP=None
if exist %OldIPFile% for /f "tokens=*" %%c in (%OldIPFile%) do set OldIP=%%c

echo Current local IPv4 address     : %IP%
echo Current external IPv4 address  : %ExternalIP%
echo Previous external IPv4 address : %OldIP%

if not %OldIP%==%ExternalIP% (
    call:UpdateEndpoint
    call:CheckIPv6||exit /b 0
) else (
    echo Skipping Endpoint update       : [OK]
)

<nul set /p ".=Checking for admin rights      : "
net session >nul 2>&1
if %ErrorLevel%==0 (
    echo [OK]
    <nul set /p ".=Deleting any existing tunnels  : "
    netsh interface teredo set state disabled >nul
    netsh interface isatap set state disabled >nul
    netsh interface 6to4 set state disabled >nul
    netsh interface ipv6 delete interface IP6Tunnel >nul
    echo [OK]

    <nul set /p ".=Creating new tunnel            : [Interface] "
    netsh interface ipv6 add v6v4tunnel interface=IP6Tunnel %IP% %TunnelServer% >nul 2>nul
    if not %ErrorLevel%==0 (
        echo Failed to add interface!
    ) else (
        <nul set /p ".=[Address] "
        netsh interface ipv6 add address IP6Tunnel %Tunnel%::%IP% >nul 2>nul
        if not %ErrorLevel%==0 (
            echo [Error]
        ) else (
            <nul set /p ".=[Route] "
            netsh interface ipv6 add route ::/0 IP6Tunnel %Tunnel%::1 >nul 2>nul
            if not %ErrorLevel%==0 (
                echo [Error]
            ) else (
                echo [OK]
                call:CheckIPv6||exit /b 0
                call:UpdateEndpoint
                if not errorlevel 2 call:CheckIPv6||exit /b 0
                exit /b 1
            )
        )
    )
) else (
    echo [Error]
)

exit /b 1

:CheckIPv6
    <nul set /p ".=Checking IPv6 connectivity     : "
    ping -6 -n 1 ipv6.he.net | find "time=" >nul
    if not errorlevel 1 (
        echo [OK]
        exit /b 1
    ) else (
        echo [Failed]
        exit /b 0
    )

:UpdateEndpoint
    if %EndPointUpdated%==1 exit /b 2
    <nul set /p ".=Updating endpoint              :"
    bitsadmin /transfer "UpdateEndpoint" /priority foreground https://ipv4.tunnelbroker.net/ipv4_end.php?ip=%ExternalIP%^&pass=%TunnelKey%^&user_id=%UserID%^&tid=%TunnelID% %UpdateResultFile% > nul
    for /f "delims=: tokens=1" %%a in (%UpdateResultFile%) do set Result=%%a
    if not "%Result%"=="-OK" (
        set /p Result2=<"%UpdateResultFile%"
        if not "%Result2%"=="-ERROR: This tunnel is already associated with this IP address.  Please try to limit your updates to IP changes." (
            echo  [Error]
            echo %Result%
            exit /b 1
        )
    )
    echo  [OK]
    echo %ExternalIP%>%OldIPFile%
    del %temp%\output.txt >nul 2>nul
    set EndPointUpdated=1
    exit /b 0