MSDHCP Server Migration

::http://blogs.technet.com/b/teamdhcp/archive/2009/02/18/migration-of-dhcp-server-from-windows-server-2003-to-windows-server-2008.aspx

@REM DhcpMig.
@ECHO OFF
@REM


@REM Variable decleration.

SET OPERATION=
SET DEST=DHCP_MIG

SET DHCP_EXPORT_FILE=dhcp_export.exp
SET REGISTRY_EXPORT_FILE=dhcp_reg_export.reg
SET DATABASE_FILE_PATH=
SET LOG_FILE_PATH=
SET LOGV6_FILE_PATH=
SET FORCE=0
SET TEMP=
SET DEST_SPECIFIED=0

SET Choice=N
SET del_choice=N

@REM


@REM Command line arguments validation.

IF (%1)==() (
    GOTO HELP
) ELSE (
    SET OPERATION=%1
)

IF NOT (%2)==() IF (%2)==(-f) (
    SET FORCE=1
)

IF NOT (%2)==() IF NOT (%2)==(-f) (
    SET DEST=%2
    SET DEST_SPECIFIED=1
)

IF NOT (%3)==() IF NOT (%2)==(-f) (
    echo.
    echo Wrong Arguments: Please refer the help below
    GOTO HELP
)

IF NOT (%3)==() (
    SET DEST=%3
    SET DEST_SPECIFIED=1
)

echo.

@REM


@REM Call Subroutine based on operation specified.

IF /I %OPERATION% == -export (
    GOTO EXPORT
) ELSE IF /I %OPERATION% == -import (
    GOTO IMPORT
) ELSE IF /I %OPERATION% == -prereq (
    GOTO Prereq
) ELSE (
    GOTO HELP
)

@REM ----------------------------------------------------------------------


@REM Export Subroutine.
@REM

:EXPORT

@REM Validate if server is installed.

sc queryex dhcpserver | findstr /i /c:"EnumQueryServicesStatus:OpenService FAILED 1060" >nul 2>nul
if %ERRORLEVEL% == 0 (
    echo ERROR:Dhcp server does not seen to have been installed on this machine.
    echo       Please run the script on a correct server.
    GOTO:EOF
)

@REM Validate if server is running. Start if -f is specified else bail-out.

sc queryex dhcpserver | findstr STATE | findstr RUNNING 1>nul 2>nul
if not %ERRORLEVEL% == 0 (
    IF %FORCE% == 0 (
        echo Dhcp Server is not running on the Local machine.
        echo Specify -f option to start the Server and perform an export.
        GOTO:EOF
    )
    IF %FORCE% == 1 (
        net start dhcpserver
    )
)

@REM Set Log file paths by reading the registry.

SET LOG_FILE_REG= reg query HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\DHCPServer\Parameters /v DhcpLogFilePath
FOR /F "usebackq delims==" %%z in (`%LOG_FILE_REG%`) do SET TEMP=%%z
SET LOG_FILE_REG=%TEMP%
for %%z in (%LOG_FILE_REG%) do SET LOG_FILE_PATH=%%z

SET LOG_FILE_REG= reg query HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\DHCPServer\Parameters /v DhcpV6LogFilePath
FOR /F "usebackq delims==" %%z in (`%LOG_FILE_REG%`) do SET TEMP=%%z
SET LOG_FILE_REG=%TEMP%
for %%z in (%LOG_FILE_REG%) do SET LOGV6_FILE_PATH=%%z


@REM Create the destination directory if it does not exist.

IF %DEST_SPECIFIED% == 0 (
    echo No destination directory specified.
    echo Settings will be exported to %DEST% in the Local directory.
)

if not exist %DEST%\* (
    md %DEST%
    IF not errorlevel 0 (
        echo Cannot create "%DEST%" directory. Please check permissions.
    ) ELSE (
        echo Successfully created "%DEST%" directory.
    )
)


@REM Validate if the destination directory is empty.
@REM If -f is specified, delete the contents else bail-out.

if exist %DEST%\dhcp*.* (
    echo Directory %DEST% is not empty.
    IF %FORCE% == 0 (
        echo Backup the files and start again or
        echo Please specify a different directory or
        echo Specify '-f' option to overwrite directory contents.
        GOTO:EOF
    )
    IF %FORCE% == 1 (
        echo Force deleting the contents of directory %DEST%
        pushd %DEST%
        del /q *.* 1>nul 2>nul
        if exist Logs (
            pushd Logs
            del /q *.* 1>nul 2>nul
            popd
            rmdir Logs
        )
        popd
    )
)


@REM Invoke Export command.

pushd %DEST%

echo Exporting Server configurations to the file %DHCP_EXPORT_FILE%
netsh dhcp server export %DHCP_EXPORT_FILE% all 1>nul 2>nul

@REM Export registry settings.

echo Exporting registry settings to %REGISTRY_EXPORT_FILE%
REG EXPORT HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\DHCPServer\Parameters %REGISTRY_EXPORT_FILE%

@REM Remove all "Paths" from the registry export.. (Paths will not be migrated)

type %REGISTRY_EXPORT_FILE% | findstr /vi path > temp.reg
del %REGISTRY_EXPORT_FILE%
ren temp.reg %REGISTRY_EXPORT_FILE%


@REM Copy the log files from the location specified in the registry.

md Logs

if %LOG_FILE_PATH%==%LOGV6_FILE_PATH% (
    echo Backing up Log Files from %LOG_FILE_PATH%
    copy %LOG_FILE_PATH%\Dhcp*.log logs 1>nul 2>nul
) ELSE (
    echo Backing up DHCP Log Files from %LOG_FILE_PATH%
    copy %LOG_FILE_PATH%\Dhcp*.log logs 1>nul 2>nul

    echo Backing up DHCPV6 Log Files from %LOGV6_FILE_PATH%
    copy %LOGV6_FILE_PATH%\Dhcp*.log logs 1>nul 2>nul
)

echo.
echo Settings exported successfully.

popd

GOTO:EOF

@REM ----------------------------------------------------------------------


@REM Import Subroutine.
@REM

:IMPORT

@REM Validate source directory and bail-out if it does not exist.

if not exist %DEST%\* (
    echo The directory %DEST% does not exist or is not accessible.
    echo.
    echo Please provide a correct directory and start again.
    popd
    GOTO:EOF
)

@REM Validate individual files and bail-out if they do not exist.

pushd %DEST%

if not exist %DHCP_EXPORT_FILE% (
    echo %DEST%\%DHCP_EXPORT_FILE% file does not exist or is not accessible.
    echo.
    echo Please provide a correct directory and start again.
    popd
    GOTO:EOF
)

if not exist %REGISTRY_EXPORT_FILE% (
    echo %DEST%\%REGISTRY_EXPORT_FILE% file does not exist or is not accessible.
    echo.
    echo Please provide a correct directory and start again.
    popd
    GOTO:EOF
)

if not exist Logs\* (
    echo Directory %DEST% does not contain the "Logs" directory.
    echo.
    echo Please verify and provide a correct directory and start again.
    popd
    GOTO:EOF
)

@REM Check if DHCP Server is installed. Bail-out if not.

sc queryex dhcpserver | findstr /i /c:"EnumQueryServicesStatus:OpenService FAILED 1060" >nul 2>nul
if not %ERRORLEVEL% == 0 goto DhcpServerInstalled
echo DHCP Server is not installed in the local machine.
GOTO Prereq
GOTO:EOF

@REM Stop the server if it is running.

:DhcpServerInstalled
echo DHCP Server Service is installed..
sc queryex dhcpserver | findstr STATE | findstr RUNNING 1>nul 2>nul
if %ERRORLEVEL% == 0 goto DhcpServerStarted
goto DhcpServerStopped


:DhcpServerStarted
echo DHCP Server Service is running..
echo Attempting to cleanup the Server Database..
net stop dhcpserver
CALL:sleep 2

@REM Restore registry settings. (No paths are migrated - Refer prerequisite.)
:DhcpServerStopped
echo Restoring the DHCP specific Registry Settings.
REG IMPORT %REGISTRY_EXPORT_FILE%

SET LOG_FILE_REG= reg query HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\DHCPServer\Parameters /v DatabasePath
FOR /F "usebackq delims==" %%z in (`%LOG_FILE_REG%`) do SET TEMP=%%z
SET LOG_FILE_REG=%TEMP%
for %%z in (%LOG_FILE_REG%) do SET DATABASE_FILE_PATH=%%z

SET LOG_FILE_REG= reg query HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\DHCPServer\Parameters /v DhcpLogFilePath
FOR /F "usebackq delims==" %%z in (`%LOG_FILE_REG%`) do SET TEMP=%%z
SET LOG_FILE_REG=%TEMP%
for %%z in (%LOG_FILE_REG%) do SET LOG_FILE_PATH=%%z

SET LOG_FILE_REG= reg query HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\DHCPServer\Parameters /v DhcpV6LogFilePath
FOR /F "usebackq delims==" %%z in (`%LOG_FILE_REG%`) do SET TEMP=%%z
SET LOG_FILE_REG=%TEMP%
for %%z in (%LOG_FILE_REG%) do SET LOGV6_FILE_PATH=%%z

@REM Delete the existing database if -f is specified.

if %FORCE%==1 (
    echo Deleting stale database if any.
    del /q %DATABASE_FILE_PATH%\*
)

@REM Restore the log files to the path found in registry.

if %LOG_FILE_PATH%==%LOGV6_FILE_PATH% (
    echo Copying the DHCP and DHCPV6 log files to the logs directory.
    copy Logs\Dhcp*.log %LOG_FILE_PATH% 1>nul 2>nul
) ELSE (
    echo Copying the DHCP log files to the logs directory.
    copy Logs\Dhcp*.log %LOG_FILE_PATH% 1>nul 2>nul

    echo Copying the DHCPV6 log files to the logs directory.
    copy Logs\Dhcp*.log %LOGV6_FILE_PATH% 1>nul 2>nul
)

@REM Start the DHCP Server.

echo Starting the DHCP Server.
net start dhcpserver
IF errorlevel 0 (
    echo DHCP Server Started Successfully.
    CALL:sleep 4
) ELSE (
    echo Problem starting DHCP Server.
        echo Reinstall the dhcp service and start importing again.
    GOTO:EOF
)

@REM Import the exported settings.

echo Importing settings from %DHCP_EXPORT_FILE%.
netsh dhcp server import %DHCP_EXPORT_FILE% all 1>nul 2>nul

@REM Detect conflict and bail-out with a message asking to use -f option.
@REM If No conflict detected, display success.
IF errorlevel 1 (
    echo.
    echo Existing Server Database conflicts with the import settings.
    echo Try Force option -f to import after force delete of the current database.
) ELSE (
    echo.
    echo Server Settings imported successfully.
)

echo.

popd

GOTO:EOF

@REM ----------------------------------------------------------------------


@REM Help Subroutine - Usage and Examples.

:HELP

echo.
echo DhcpMig
echo.
echo This Help screen will be displayed if the options specified are either invalid
echo or incomplete.
echo.
echo Please refer to the Usage and Examples below.
echo.
echo USAGE:
echo.
echo Prerequisite: DhcpMig -Prereq
echo.
echo        - Displays Requirements before doing the Export/Import operations.
echo        - Recommended to read it once before proceeding.
echo.
echo Export:  DhcpMig -export [-f] [Path]
echo.
echo    [Path] is an optional Local/Remote location where the settings are stored.
echo        - If not specified, A default  directory with name DHCP_MIG will be
echo          created in the current location.
echo        - It can also be a network fileshare location with write access to the
echo          current user.
echo.
echo    [-f] is an optional force flag.
echo        - When the force flag is specified, If the [Path] specified is not
echo          empty, All contents will be deleted before exporting.
echo        - The server will be started for export operation if it in stopped state.
echo.
echo Import:  DhcpMig -import [-f] [Path]
echo.
echo    [Path] is an optional directory name where the settings will be retrived.
echo        - It should be same as the Path specified during Export operation.
echo        - It can also be a network fileshare location with read access to the
echo          current user.
echo        - If the default directory is used, It should be copied to the target
echo          machine before import.
echo.
echo    [-f] is an optional force flag.
echo        - When the force flag is specified, the current database if any will
echo          be deleted before importing.
echo        - If the force flag is not specified, the databases will be "merged"
echo          and an error will be thrown in case of a collision.
echo.
echo.
echo Examples:
echo.
echo Export:
echo.
echo    DhcpMig -export
echo        - Exports settings and configurations to the default DHCP_MIG
echo          directory in the current location.
echo.
echo    DhcpMig -export "\\<Fileshare>\dhcpconf\"
echo        - Exports setting and configurations to the specified local or shared
echo          directory.  (dhcpconf in this case)
echo        - Please ensure that the directory specified has write permissions to
echo          the current user.
echo.
echo    DhcpMig -export -f "\\<Fileshare>\dhcpconf\"
echo        - Forces deletion of all contents of target directory if it is non-empty.
echo        - Starts the DHCP Server inorder to complete the export operation if it
echo          is not running.
echo        - Exports setting and configurations to the specified local or shared
echo          directory.  (dhcpconf in this case)
echo.
echo.
echo Import:
echo.
echo    DhcpMig -import
echo        - Imports settings and configurations from the default DHCP_MIG
echo          directory in the current location.
echo        - Throws an error if DHCP_MIG directory is not present in the current
echo          location.
echo        - Throws an error if the current server configuration conflicts with
echo          the settings being imported. Use -f if a conflict is reported.
echo.
echo    DhcpMig -import -f
echo        - Deletes current server configurations if any. (FORCE flag Specified)
echo        - Imports settings and configurations from the default DHCP_MIG
echo          directory in the current location.
echo        - Throws an error if the DHCP_MIG directory is not present in the
echo          current location.
echo.
echo    DhcpMig -import "\\<Fileshare>\dhcpconf\"
echo        - Imports settings and configurations from the specified local or shared
echo          directory. (dhcpconf in this case)
echo        - Throws an error if the specified directory is unavailable or
echo          unreachable.
echo        - Throws an error if the current server configuration conflicts with
echo          the settings being imported. Use -f if a conflict is reported.
echo.
echo    DhcpMig -import -f "\\<Fileshare>\dhcpconf\"
echo        - Deletes current server configurations if any. (FORCE flag Specified)
echo        - Imports settings and configurations from the specified local or shared
echo          directory. (dhcpconf in this case)
echo        - Throws an error if the specified directory is unavailable or
echo          unreachable.
echo.
echo NOTE: The DHCP Server will be started and ready to give out addresses after the
echo       import operation completes.
echo.

GOTO:EOF

@REM


@REM Prerequisite Subroutine - Initial conditions for Import and Export.


:Prereq

echo.
echo Please ensure the below Prerequisite before performing export/import operations.
echo.
echo EXPORT:
echo.
echo   - The DHCP Server should be running on the local machine.
echo   - The Export path specified should be accessible from local machine.
echo.
echo IMPORT:
echo.
echo   - The DHCP Server should be installed in the Local machine.
echo   - The Network addresses should be configured and server bound to the addresses.
echo   - The desired Paths for the Database, Backups and Audit Logs should be set as
echo         required. Ignore this step if you don't plan to change default paths.
echo   - The Database/Logs etc will be migrated to the paths mentioned.
echo        Database and Backups:
echo            Dhcpmgmt.msc -^> Select Server -^> Properties -^> To set.
echo        Audit logs:
echo            Dhcpmgmt.msc -^> Ipv4/Ipv6 -^> Properties -^> Advanced -^> To set.
echo   - The server startup should be set to "auto".
echo        SC Config DhcpServer start= auto
echo   - The Server can be Running or Stopped.
echo.
echo.
echo   NOTE: THE PATHS WILL NOT BE MIGRATED. ONLY THE CONFIGURED PATHS WILL BE USED.
echo.

GOTO:EOF


@REM


@REM Sleep Subroutine - Helper.

:sleep

set _x=%~1
set tick=0
set startTime=%time%
set myMili=%startTime:~9,2%

:newTick
set /A tick=%tick%+1
set myTime=%time%
set mySec=%myTime:~7,1%

:newtime
set newTime=%time%
set twoSec=%newTime:~7,1%
set twoMili=%newTime:~9,2%

if %mySec% EQU %twoSec% (GOTO newtime) else GOTO nextTest

:nextTest
if %myMili% LEQ %twoMili%+1 (goto tick) else goto newtime
:tick

if %tick% NEQ %_x% goto newTick else GOTO:EOF

@REM