private static NativeMethods.SpDeviceInfoData CreateDeviceInfoDataInstance()
{
NativeMethods.SpDeviceInfoData did = new NativeMethods.SpDeviceInfoData();
did.cbSize = (uint)Marshal.SizeOf(did);
return(did);
}
internal static IEnumerable <DeviceInfo> EnumerateDevicesInternal(SafeHandle safeHandle, string hostName, DeviceGuid deviceInterfaceGuid)
{
bool callerHandle = safeHandle != null;
Guid deviceGuid = new Guid(Utils.GetEnumDescription(deviceInterfaceGuid));
// CM_Connect_Machine()
// MSDN Note: Beginning in Windows 8 and Windows Server 2012 functionality to access remote machines has been removed.
// You cannot access remote machines when running on these versions of Windows.
// http://msdn.microsoft.com/en-us/library/windows/hardware/ff537948%28v=vs.85%29.aspx
SafeCmConnectMachineHandle safeMachineHandle;
int lastError = NativeMethods.CM_Connect_Machine(Path.LocalToUncInternal(Host.GetUncName(hostName), false, false, false, false), out safeMachineHandle);
if (safeMachineHandle.IsInvalid)
{
safeMachineHandle.Close();
NativeError.ThrowException(lastError, Resources.HandleInvalid);
}
using (safeMachineHandle)
{
// Start at the "Root" of the device tree of the specified machine.
if (!callerHandle)
{
safeHandle = NativeMethods.SetupDiGetClassDevsEx(ref deviceGuid, IntPtr.Zero, IntPtr.Zero,
NativeMethods.SetupDiGetClassDevsExFlags.Present |
NativeMethods.SetupDiGetClassDevsExFlags.DeviceInterface,
IntPtr.Zero, hostName, IntPtr.Zero);
}
if (safeHandle.IsInvalid)
{
safeHandle.Close();
NativeError.ThrowException(Marshal.GetLastWin32Error(), Resources.HandleInvalid);
}
try
{
uint memberInterfaceIndex = 0;
NativeMethods.SpDeviceInterfaceData deviceInterfaceData = CreateDeviceInterfaceDataInstance();
// Start enumerating Device Interfaces.
while (NativeMethods.SetupDiEnumDeviceInterfaces(safeHandle, IntPtr.Zero, ref deviceGuid, memberInterfaceIndex++, ref deviceInterfaceData))
{
lastError = Marshal.GetLastWin32Error();
if (lastError != Win32Errors.NO_ERROR)
{
NativeError.ThrowException(lastError, hostName);
}
NativeMethods.SpDeviceInfoData deviceInfoData = CreateDeviceInfoDataInstance();
NativeMethods.SpDeviceInterfaceDetailData deviceInterfaceDetailData = GetDeviceInterfaceDetailDataInstance(safeHandle, deviceInterfaceData, deviceInfoData);
// Get device interace details.
if (!NativeMethods.SetupDiGetDeviceInterfaceDetail(safeHandle, ref deviceInterfaceData, ref deviceInterfaceDetailData, NativeMethods.DefaultFileBufferSize, IntPtr.Zero, ref deviceInfoData))
{
lastError = Marshal.GetLastWin32Error();
if (lastError != Win32Errors.NO_ERROR)
{
NativeError.ThrowException(lastError, hostName);
}
}
// Create DeviceInfo instance.
// Set DevicePath property of DeviceInfo instance.
DeviceInfo deviceInfo = new DeviceInfo(hostName)
{
DevicePath = deviceInterfaceDetailData.DevicePath
};
// Current InstanceId is at the "USBSTOR" level, so we
// need up "move up" one level to get to the "USB" level.
uint ptrPrevious;
// CM_Get_Parent_Ex()
// Note: Using this function to access remote machines is not supported
// beginning with Windows 8 and Windows Server 2012, as this functionality has been removed.
// http://msdn.microsoft.com/en-us/library/windows/hardware/ff538615%28v=vs.85%29.aspx
lastError = NativeMethods.CM_Get_Parent_Ex(out ptrPrevious, deviceInfoData.DevInst, 0, safeMachineHandle);
if (lastError != Win32Errors.CR_SUCCESS)
{
NativeError.ThrowException(lastError, hostName);
}
// Now we get the InstanceID of the USB level device.
using (SafeGlobalMemoryBufferHandle safeBuffer = new SafeGlobalMemoryBufferHandle(NativeMethods.DefaultFileBufferSize))
{
// CM_Get_Device_ID_Ex()
// Note: Using this function to access remote machines is not supported beginning with Windows 8 and Windows Server 2012,
// as this functionality has been removed.
// http://msdn.microsoft.com/en-us/library/windows/hardware/ff538411%28v=vs.85%29.aspx
lastError = NativeMethods.CM_Get_Device_ID_Ex(deviceInfoData.DevInst, safeBuffer, (uint)safeBuffer.Capacity, 0, safeMachineHandle);
if (lastError != Win32Errors.CR_SUCCESS)
{
NativeError.ThrowException(lastError, hostName);
}
// CA2001:AvoidCallingProblematicMethods
IntPtr buffer = IntPtr.Zero;
bool successRef = false;
safeBuffer.DangerousAddRef(ref successRef);
// MSDN: The DangerousGetHandle method poses a security risk because it can return a handle that is not valid.
if (successRef)
{
buffer = safeBuffer.DangerousGetHandle();
}
safeBuffer.DangerousRelease();
if (buffer == IntPtr.Zero)
{
NativeError.ThrowException(Resources.HandleDangerousRef);
}
// CA2001:AvoidCallingProblematicMethods
// Add to instance.
deviceInfo.InstanceId = Marshal.PtrToStringUni(buffer);
}
#region Get Registry Properties
using (SafeGlobalMemoryBufferHandle safeBuffer = new SafeGlobalMemoryBufferHandle(NativeMethods.DefaultFileBufferSize))
{
uint regType;
string dataString;
// CA2001:AvoidCallingProblematicMethods
IntPtr buffer = IntPtr.Zero;
bool successRef = false;
safeBuffer.DangerousAddRef(ref successRef);
// MSDN: The DangerousGetHandle method poses a security risk because it can return a handle that is not valid.
if (successRef)
{
buffer = safeBuffer.DangerousGetHandle();
}
safeBuffer.DangerousRelease();
if (buffer == IntPtr.Zero)
{
NativeError.ThrowException(Resources.HandleDangerousRef);
}
// CA2001:AvoidCallingProblematicMethods
uint safeBufferCapacity = (uint)safeBuffer.Capacity;
if (NativeMethods.SetupDiGetDeviceRegistryProperty(safeHandle, ref deviceInfoData, NativeMethods.SetupDiGetDeviceRegistryPropertyEnum.BaseContainerId, out regType, safeBuffer, safeBufferCapacity, IntPtr.Zero))
{
dataString = Marshal.PtrToStringUni(buffer);
if (!Utils.IsNullOrWhiteSpace(dataString))
{
deviceInfo.BaseContainerId = new Guid(dataString);
}
}
if (NativeMethods.SetupDiGetDeviceRegistryProperty(safeHandle, ref deviceInfoData, NativeMethods.SetupDiGetDeviceRegistryPropertyEnum.ClassGuid, out regType, safeBuffer, safeBufferCapacity, IntPtr.Zero))
{
dataString = Marshal.PtrToStringUni(buffer);
if (!Utils.IsNullOrWhiteSpace(dataString))
{
deviceInfo.ClassGuid = new Guid(dataString);
}
}
if (NativeMethods.SetupDiGetDeviceRegistryProperty(safeHandle, ref deviceInfoData, NativeMethods.SetupDiGetDeviceRegistryPropertyEnum.Class, out regType, safeBuffer, safeBufferCapacity, IntPtr.Zero))
{
deviceInfo.Class = Marshal.PtrToStringUni(buffer);
}
if (NativeMethods.SetupDiGetDeviceRegistryProperty(safeHandle, ref deviceInfoData, NativeMethods.SetupDiGetDeviceRegistryPropertyEnum.CompatibleIds, out regType, safeBuffer, safeBufferCapacity, IntPtr.Zero))
{
deviceInfo.CompatibleIds = Marshal.PtrToStringUni(buffer);
}
if (NativeMethods.SetupDiGetDeviceRegistryProperty(safeHandle, ref deviceInfoData, NativeMethods.SetupDiGetDeviceRegistryPropertyEnum.DeviceDescription, out regType, safeBuffer, safeBufferCapacity, IntPtr.Zero))
{
deviceInfo.DeviceDescription = Marshal.PtrToStringUni(buffer);
}
if (NativeMethods.SetupDiGetDeviceRegistryProperty(safeHandle, ref deviceInfoData, NativeMethods.SetupDiGetDeviceRegistryPropertyEnum.Driver, out regType, safeBuffer, safeBufferCapacity, IntPtr.Zero))
{
deviceInfo.Driver = Marshal.PtrToStringUni(buffer);
}
if (NativeMethods.SetupDiGetDeviceRegistryProperty(safeHandle, ref deviceInfoData, NativeMethods.SetupDiGetDeviceRegistryPropertyEnum.EnumeratorName, out regType, safeBuffer, safeBufferCapacity, IntPtr.Zero))
{
deviceInfo.EnumeratorName = Marshal.PtrToStringUni(buffer);
}
if (NativeMethods.SetupDiGetDeviceRegistryProperty(safeHandle, ref deviceInfoData, NativeMethods.SetupDiGetDeviceRegistryPropertyEnum.FriendlyName, out regType, safeBuffer, safeBufferCapacity, IntPtr.Zero))
{
deviceInfo.FriendlyName = Marshal.PtrToStringUni(buffer);
}
if (NativeMethods.SetupDiGetDeviceRegistryProperty(safeHandle, ref deviceInfoData, NativeMethods.SetupDiGetDeviceRegistryPropertyEnum.HardwareId, out regType, safeBuffer, safeBufferCapacity, IntPtr.Zero))
{
deviceInfo.HardwareId = Marshal.PtrToStringUni(buffer);
}
if (NativeMethods.SetupDiGetDeviceRegistryProperty(safeHandle, ref deviceInfoData, NativeMethods.SetupDiGetDeviceRegistryPropertyEnum.LocationInformation, out regType, safeBuffer, safeBufferCapacity, IntPtr.Zero))
{
deviceInfo.LocationInformation = Marshal.PtrToStringUni(buffer);
}
if (NativeMethods.SetupDiGetDeviceRegistryProperty(safeHandle, ref deviceInfoData, NativeMethods.SetupDiGetDeviceRegistryPropertyEnum.LocationPaths, out regType, safeBuffer, safeBufferCapacity, IntPtr.Zero))
{
deviceInfo.LocationPaths = Marshal.PtrToStringUni(buffer);
}
if (NativeMethods.SetupDiGetDeviceRegistryProperty(safeHandle, ref deviceInfoData, NativeMethods.SetupDiGetDeviceRegistryPropertyEnum.Manufacturer, out regType, safeBuffer, safeBufferCapacity, IntPtr.Zero))
{
deviceInfo.Manufacturer = Marshal.PtrToStringUni(buffer);
}
if (NativeMethods.SetupDiGetDeviceRegistryProperty(safeHandle, ref deviceInfoData, NativeMethods.SetupDiGetDeviceRegistryPropertyEnum.PhysicalDeviceObjectName, out regType, safeBuffer, safeBufferCapacity, IntPtr.Zero))
{
deviceInfo.PhysicalDeviceObjectName = Marshal.PtrToStringUni(buffer);
}
if (NativeMethods.SetupDiGetDeviceRegistryProperty(safeHandle, ref deviceInfoData, NativeMethods.SetupDiGetDeviceRegistryPropertyEnum.Service, out regType, safeBuffer, safeBufferCapacity, IntPtr.Zero))
{
deviceInfo.Service = Marshal.PtrToStringUni(buffer);
}
}
#endregion // Get Registry Properties
yield return(deviceInfo);
// Get new structure instance.
deviceInterfaceData = CreateDeviceInterfaceDataInstance();
}
}
finally
{
// Handle is ours, dispose.
if (!callerHandle && safeHandle != null)
{
safeHandle.Close();
}
}
}
}
private static NativeMethods.SpDeviceInterfaceDetailData GetDeviceInterfaceDetailDataInstance(SafeHandle safeHandle, NativeMethods.SpDeviceInterfaceData deviceInterfaceData, NativeMethods.SpDeviceInfoData deviceInfoData)
{
// Build a Device Interface Detail Data structure.
NativeMethods.SpDeviceInterfaceDetailData didd = new NativeMethods.SpDeviceInterfaceDetailData
{
cbSize = (IntPtr.Size == 4) ? (uint)(Marshal.SystemDefaultCharSize + 4) : 8
};
// Get device interace details.
if (!NativeMethods.SetupDiGetDeviceInterfaceDetail(safeHandle, ref deviceInterfaceData, ref didd, NativeMethods.DefaultFileBufferSize, IntPtr.Zero, ref deviceInfoData))
{
int lastError = Marshal.GetLastWin32Error();
if (lastError != Win32Errors.NO_ERROR)
{
// Throws IOException.
NativeError.ThrowException(lastError, true);
}
}
return(didd);
}
