MiniLab

1.0.2

Private/ConfirmAzureVM.ps1

                                function ConfirmAzureVM {

    $source = @"

using System;

using System.Collections.Generic;

using System.Text;

using System.Runtime.InteropServices;

using System.ComponentModel;

using System.Net.NetworkInformation;

namespace Microsoft.WindowsAzure.Internal

{

    /// <summary>

    /// A simple DHCP client.

    /// </summary>

    public class DhcpClient : IDisposable

    {

        public DhcpClient()

        {

            uint version;

            int err = NativeMethods.DhcpCApiInitialize(out version);

            if (err != 0)

                throw new Win32Exception(err);

        }

        public void Dispose()

        {

            NativeMethods.DhcpCApiCleanup();

        }

        /// <summary>

        /// Gets the available interfaces that are enabled for DHCP.

        /// </summary>

        /// <remarks>

        /// The operational status of the interface is not assessed.

        /// </remarks>

        /// <returns></returns>

        public static IEnumerable<NetworkInterface> GetDhcpInterfaces()

        {

            foreach (NetworkInterface nic in NetworkInterface.GetAllNetworkInterfaces())

            {

                if (nic.NetworkInterfaceType != NetworkInterfaceType.Ethernet) continue;

                if (!nic.Supports(NetworkInterfaceComponent.IPv4)) continue;

                IPInterfaceProperties props = nic.GetIPProperties();

                if (props == null) continue;

                IPv4InterfaceProperties v4props = props.GetIPv4Properties();

                if (v4props == null) continue;

                if (!v4props.IsDhcpEnabled) continue;

                yield return nic;

            }

        }

        /// <summary>

        /// Requests DHCP parameter data.

        /// </summary>

        /// <remarks>

        /// Windows serves the data from a cache when possible.  

        /// With persistent requests, the option is obtained during boot-time DHCP negotiation.

        /// </remarks>

        /// <param name="optionId">the option to obtain.</param>

        /// <param name="isVendorSpecific">indicates whether the option is vendor-specific.</param>

        /// <param name="persistent">indicates whether the request should be persistent.</param>

        /// <returns></returns>

        public byte[] DhcpRequestParams(string adapterName, uint optionId)

        {

            uint bufferSize = 1024;

        Retry:

            IntPtr buffer = Marshal.AllocHGlobal((int)bufferSize);

            try

            {

                NativeMethods.DHCPCAPI_PARAMS_ARRAY sendParams = new NativeMethods.DHCPCAPI_PARAMS_ARRAY();

                sendParams.nParams = 0;

                sendParams.Params = IntPtr.Zero;

                NativeMethods.DHCPCAPI_PARAMS recv = new NativeMethods.DHCPCAPI_PARAMS();

                recv.Flags = 0x0;

                recv.OptionId = optionId;

                recv.IsVendor = false;

                recv.Data = IntPtr.Zero;

                recv.nBytesData = 0;

                IntPtr recdParamsPtr = Marshal.AllocHGlobal(Marshal.SizeOf(recv));

                try

                {

                    Marshal.StructureToPtr(recv, recdParamsPtr, false);

                    NativeMethods.DHCPCAPI_PARAMS_ARRAY recdParams = new NativeMethods.DHCPCAPI_PARAMS_ARRAY();

                    recdParams.nParams = 1;

                    recdParams.Params = recdParamsPtr;

                    NativeMethods.DhcpRequestFlags flags = NativeMethods.DhcpRequestFlags.DHCPCAPI_REQUEST_SYNCHRONOUS;

                    int err = NativeMethods.DhcpRequestParams(

                        flags,

                        IntPtr.Zero,

                        adapterName,

                        IntPtr.Zero,

                        sendParams,

                        recdParams,

                        buffer,

                        ref bufferSize,

                        null);

                    if (err == NativeMethods.ERROR_MORE_DATA)

                    {

                        bufferSize *= 2;

                        goto Retry;

                    }

                    if (err != 0)

                        throw new Win32Exception(err);

                    recv = (NativeMethods.DHCPCAPI_PARAMS) 

                        Marshal.PtrToStructure(recdParamsPtr, typeof(NativeMethods.DHCPCAPI_PARAMS));

                    if (recv.Data == IntPtr.Zero)

                        return null;

                    byte[] data = new byte[recv.nBytesData];

                    Marshal.Copy(recv.Data, data, 0, (int)recv.nBytesData);

                    return data;

                }

                finally

                {

                    Marshal.FreeHGlobal(recdParamsPtr);

                }

            }

            finally

            {

                Marshal.FreeHGlobal(buffer);

            }

        }

        ///// <summary>

        ///// Unregisters a persistent request.

        ///// </summary>

        //public void DhcpUndoRequestParams()

        //{

        //    int err = NativeMethods.DhcpUndoRequestParams(0, IntPtr.Zero, null, this.ApplicationID);

        //    if (err != 0)

        //        throw new Win32Exception(err);

        //}

        #region Native Methods

    }

    internal static partial class NativeMethods

    {

        public const uint ERROR_MORE_DATA = 124;

        [DllImport("dhcpcsvc.dll", EntryPoint = "DhcpRequestParams", CharSet = CharSet.Unicode, SetLastError = false)]

        public static extern int DhcpRequestParams(

            DhcpRequestFlags Flags,

            IntPtr Reserved,

            string AdapterName,

            IntPtr ClassId,

            DHCPCAPI_PARAMS_ARRAY SendParams,

            DHCPCAPI_PARAMS_ARRAY RecdParams,

            IntPtr Buffer,

            ref UInt32 pSize,

            string RequestIdStr

            );

        [DllImport("dhcpcsvc.dll", EntryPoint = "DhcpUndoRequestParams", CharSet = CharSet.Unicode, SetLastError = false)]

        public static extern int DhcpUndoRequestParams(

            uint Flags,

            IntPtr Reserved,

            string AdapterName,

            string RequestIdStr);

        [DllImport("dhcpcsvc.dll", EntryPoint = "DhcpCApiInitialize", CharSet = CharSet.Unicode, SetLastError = false)]

        public static extern int DhcpCApiInitialize(out uint Version);

        [DllImport("dhcpcsvc.dll", EntryPoint = "DhcpCApiCleanup", CharSet = CharSet.Unicode, SetLastError = false)]

        public static extern int DhcpCApiCleanup();

        [Flags]

        public enum DhcpRequestFlags : uint

        {

            DHCPCAPI_REQUEST_PERSISTENT = 0x01,

            DHCPCAPI_REQUEST_SYNCHRONOUS = 0x02,

            DHCPCAPI_REQUEST_ASYNCHRONOUS = 0x04,

            DHCPCAPI_REQUEST_CANCEL = 0x08,

            DHCPCAPI_REQUEST_MASK = 0x0F

        }

        [StructLayout(LayoutKind.Sequential)]

        public struct DHCPCAPI_PARAMS_ARRAY

        {

            public UInt32 nParams;

            public IntPtr Params;

        }

        [StructLayout(LayoutKind.Sequential)]

        public struct DHCPCAPI_PARAMS

        {

            public UInt32 Flags;

            public UInt32 OptionId;

            [MarshalAs(UnmanagedType.Bool)] 

            public bool IsVendor;

            public IntPtr Data;

            public UInt32 nBytesData;

        }

        #endregion

    }

}

"@

    $CurrentlyLoadedAssemblies = [System.AppDomain]::CurrentDomain.GetAssemblies()

    $detected = $False

    if (![bool]$($CurrentlyLoadedAssemblies -match "Microsoft.WindowsAzure.Internal")) {

        Add-Type -TypeDefinition $source

    }

    if (![bool]$($CurrentlyLoadedAssemblies -match "System.Serviceprocess")) {

        [void][System.Reflection.Assembly]::LoadWithPartialName('System.Serviceprocess')

    }

 $vmbus = [System.ServiceProcess.ServiceController]::GetDevices() | where {$_.Name -eq 'vmbus'}

 If($vmbus.Status -eq 'Running')

 {

  $client = New-Object Microsoft.WindowsAzure.Internal.DhcpClient

  try {

   [Microsoft.WindowsAzure.Internal.DhcpClient]::GetDhcpInterfaces() | % { 

    $val = $client.DhcpRequestParams($_.Id, 245)

    if($val -And $val.Length -eq 4) {

     $detected = $True

                }

   }

  } finally {

   $client.Dispose()

  } 

    }

 $detected

}

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# SIG # End signature block