public static string GetManufact(IntPtr h, USB_DEVICE_DESCRIPTOR PortDeviceDescriptor, int PortPortNumber)
{
if (PortDeviceDescriptor.iManufacturer > 0)
{
int nBytesReturned;
int nBytes = BUFFER_SIZE;
// build a request for string descriptor
USB_DESCRIPTOR_REQUEST Request = new USB_DESCRIPTOR_REQUEST();
Request.ConnectionIndex = PortPortNumber;
Request.SetupPacket.wValue = (short)((USB_STRING_DESCRIPTOR_TYPE << 8) + PortDeviceDescriptor.iManufacturer);
Request.SetupPacket.wLength = (short)(nBytes - Marshal.SizeOf(Request));
Request.SetupPacket.wIndex = 0x409; // Language Code
// Geez, I wish C# had a Marshal.MemSet() method
string NullString = new string((char)0, nBytes / Marshal.SystemDefaultCharSize);
IntPtr ptrRequest = Marshal.StringToHGlobalAuto(NullString);
Marshal.StructureToPtr(Request, ptrRequest, true);
// Use an IOCTL call to request the String Descriptor
if (DeviceIoControl(h, IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION, ptrRequest, nBytes, ptrRequest, nBytes, out nBytesReturned, IntPtr.Zero))
{
// The location of the string descriptor is immediately after
// the Request structure. Because this location is not "covered"
// by the structure allocation, we're forced to zero out this
// chunk of memory by using the StringToHGlobalAuto() hack above
IntPtr ptrStringDesc = new IntPtr(ptrRequest.ToInt32() + Marshal.SizeOf(Request));
USB_STRING_DESCRIPTOR StringDesc = (USB_STRING_DESCRIPTOR)Marshal.PtrToStructure(ptrStringDesc, typeof(USB_STRING_DESCRIPTOR));
return(StringDesc.bString);
}
Marshal.FreeHGlobal(ptrRequest);
}
return("");
}
private string GetSerialNumber()
{
if (_usbConnectInfomation.DeviceDescriptor.iSerialNumber <= 0)
{
return(string.Empty);
}
var request = new USB_DESCRIPTOR_REQUEST
{
ConnectionIndex = _portNo,
SetupPacket =
{
wValue = (short)((USB_STRING_DESCRIPTOR_TYPE << 8) +
_usbConnectInfomation.DeviceDescriptor.iSerialNumber)
}
};
request.SetupPacket.wLength = (short)Marshal.SizeOf(request);
// Language Code
request.SetupPacket.wIndex = 0x409;
var usbDescriptorRequest = DeviceIoControlInvoker.Invoke(
_hubHandle, IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION, request);
return(usbDescriptorRequest.StringDescriptor.bString);
}
/// <summary>
/// 获取字符串描述符
/// </summary>
/// <param name="hHubDevice">USB Hub设备句柄</param>
/// <param name="ConnectionIndex">连接索引号</param>
/// <param name="DescriptorIndex">描述符索引号</param>
/// <param name="LanguageID">语言ID</param>
/// <returns>字符串描述符</returns>
public static String GetStringDescriptor(IntPtr hHubDevice, Int32 ConnectionIndex, Byte DescriptorIndex, UInt16 LanguageID)
{
USB_DESCRIPTOR_REQUEST Buffer = new USB_DESCRIPTOR_REQUEST();
Buffer.ConnectionIndex = ConnectionIndex;
Buffer.SetupPacket.wValue = (UInt16)((USB_STRING_DESCRIPTOR_TYPE << 8) | DescriptorIndex);
Buffer.SetupPacket.wIndex = LanguageID;
Buffer.SetupPacket.wLength = MAXIMUM_USB_STRING_LENGTH;
Int32 nBytesReturned;
Boolean Status = DeviceIoControl(hHubDevice,
IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION,
ref Buffer,
Marshal.SizeOf(Buffer),
ref Buffer,
Marshal.SizeOf(Buffer),
out nBytesReturned,
IntPtr.Zero);
if (Status)
{
return(Buffer.Data.bString);
}
else
{
return(null);
}
}
internal static extern Boolean DeviceIoControl(
IntPtr hFile,
Int32 dwIoControlCode,
ref USB_DESCRIPTOR_REQUEST lpInBuffer,
Int32 nInBufferSize,
ref USB_DESCRIPTOR_REQUEST lpOutBuffer,
Int32 nOutBufferSize,
out Int32 lpBytesReturned,
IntPtr lpOverlapped
);
public int GetDescriptor(byte descriptorType, byte index, short langId, byte[] buffer, int offset, int length)
{
using (SafeFileHandle handle = Parent.OpenHandle()) {
int szRequest = Marshal.SizeOf(typeof(USB_DESCRIPTOR_REQUEST));
USB_DESCRIPTOR_REQUEST request = new USB_DESCRIPTOR_REQUEST();
request.ConnectionIndex = AdapterNumber;
request.SetupPacket.Value = (short)((descriptorType << 8) + index);
request.SetupPacket.Index = (short)langId;
request.SetupPacket.Length = (short)length;
int nBytes = length + szRequest;
Byte[] bigbuffer = new Byte[nBytes];
if (!Kernel32.DeviceIoControl(handle, UsbApi.IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION, ref request, Marshal.SizeOf(typeof(USB_DESCRIPTOR_REQUEST)), bigbuffer, nBytes, out nBytes, IntPtr.Zero))
{
if (descriptorType == (Byte)UsbDescriptorType.Device && index == 0 && langId == 0)
{
Byte[] descbytes = DeviceDescriptor.GetBytes();
length = Math.Min(descbytes.Length, length);
Array.Copy(descbytes, 0, buffer, 0, length);
return(length);
}
int err = Marshal.GetLastWin32Error();
if (err != 31)
{
throw new Win32Exception(err);
}
return(0);
}
nBytes -= szRequest;
if (nBytes > length)
{
nBytes = length;
}
if (nBytes < 0)
{
return(0);
}
if (nBytes > 0)
{
Buffer.BlockCopy(bigbuffer, szRequest, buffer, offset, nBytes);
}
return(nBytes);
}
}
public USBDevice GetDevice()
{
if (!this.PortIsDeviceConnected)
{
return(null);
}
USBDevice uSBDevice = new USBDevice();
uSBDevice.DevicePortNumber = this.PortPortNumber;
uSBDevice.DeviceHubDevicePath = this.PortHubDevicePath;
uSBDevice.DeviceDescriptor = this.PortDeviceDescriptor;
uSBDevice.DeviceVID = this.PortDeviceDescriptor.idVendor;
uSBDevice.DevicePID = this.PortDeviceDescriptor.idProduct;
IntPtr intPtr = Acer_USB_Library.CreateFile(this.PortHubDevicePath, 1073741824, 2, IntPtr.Zero, 3, 0, IntPtr.Zero);
if (intPtr.ToInt32() != -1)
{
int num = 2048;
string s = new string('\0', 2048 / Marshal.SystemDefaultCharSize);
int num2 = default(int);
if (this.PortDeviceDescriptor.iManufacturer > 0)
{
USB_DESCRIPTOR_REQUEST structure = default(USB_DESCRIPTOR_REQUEST);
structure.ConnectionIndex = this.PortPortNumber;
structure.SetupPacket.wValue = (short)(768 + this.PortDeviceDescriptor.iManufacturer);
structure.SetupPacket.wLength = (short)(num - Marshal.SizeOf(structure));
structure.SetupPacket.wIndex = 1033;
IntPtr intPtr2 = Marshal.StringToHGlobalAuto(s);
Marshal.StructureToPtr(structure, intPtr2, true);
if (Acer_USB_Library.DeviceIoControl(intPtr, 2229264, intPtr2, num, intPtr2, num, out num2, IntPtr.Zero))
{
USB_STRING_DESCRIPTOR uSB_STRING_DESCRIPTOR = (USB_STRING_DESCRIPTOR)Marshal.PtrToStructure(new IntPtr(intPtr2.ToInt32() + Marshal.SizeOf(structure)), typeof(USB_STRING_DESCRIPTOR));
uSBDevice.DeviceManufacturer = uSB_STRING_DESCRIPTOR.bString;
}
Marshal.FreeHGlobal(intPtr2);
}
if (this.PortDeviceDescriptor.iProduct > 0)
{
USB_DESCRIPTOR_REQUEST structure2 = default(USB_DESCRIPTOR_REQUEST);
structure2.ConnectionIndex = this.PortPortNumber;
structure2.SetupPacket.wValue = (short)(768 + this.PortDeviceDescriptor.iProduct);
structure2.SetupPacket.wLength = (short)(num - Marshal.SizeOf(structure2));
structure2.SetupPacket.wIndex = 1033;
IntPtr intPtr3 = Marshal.StringToHGlobalAuto(s);
Marshal.StructureToPtr(structure2, intPtr3, true);
if (Acer_USB_Library.DeviceIoControl(intPtr, 2229264, intPtr3, num, intPtr3, num, out num2, IntPtr.Zero))
{
USB_STRING_DESCRIPTOR uSB_STRING_DESCRIPTOR2 = (USB_STRING_DESCRIPTOR)Marshal.PtrToStructure(new IntPtr(intPtr3.ToInt32() + Marshal.SizeOf(structure2)), typeof(USB_STRING_DESCRIPTOR));
uSBDevice.DeviceProduct = uSB_STRING_DESCRIPTOR2.bString;
}
Marshal.FreeHGlobal(intPtr3);
}
if (this.PortDeviceDescriptor.iSerialNumber > 0)
{
USB_DESCRIPTOR_REQUEST structure3 = default(USB_DESCRIPTOR_REQUEST);
structure3.ConnectionIndex = this.PortPortNumber;
structure3.SetupPacket.wValue = (short)(768 + this.PortDeviceDescriptor.iSerialNumber);
structure3.SetupPacket.wLength = (short)(num - Marshal.SizeOf(structure3));
structure3.SetupPacket.wIndex = 1033;
IntPtr intPtr4 = Marshal.StringToHGlobalAuto(s);
Marshal.StructureToPtr(structure3, intPtr4, true);
if (Acer_USB_Library.DeviceIoControl(intPtr, 2229264, intPtr4, num, intPtr4, num, out num2, IntPtr.Zero))
{
USB_STRING_DESCRIPTOR uSB_STRING_DESCRIPTOR3 = (USB_STRING_DESCRIPTOR)Marshal.PtrToStructure(new IntPtr(intPtr4.ToInt32() + Marshal.SizeOf(structure3)), typeof(USB_STRING_DESCRIPTOR));
uSBDevice.DeviceSerialNumber = uSB_STRING_DESCRIPTOR3.bString;
}
Marshal.FreeHGlobal(intPtr4);
}
USB_NODE_CONNECTION_DRIVERKEY_NAME uSB_NODE_CONNECTION_DRIVERKEY_NAME = default(USB_NODE_CONNECTION_DRIVERKEY_NAME);
uSB_NODE_CONNECTION_DRIVERKEY_NAME.ConnectionIndex = this.PortPortNumber;
num = Marshal.SizeOf(uSB_NODE_CONNECTION_DRIVERKEY_NAME);
IntPtr intPtr5 = Marshal.AllocHGlobal(num);
Marshal.StructureToPtr(uSB_NODE_CONNECTION_DRIVERKEY_NAME, intPtr5, true);
if (Acer_USB_Library.DeviceIoControl(intPtr, 2229280, intPtr5, num, intPtr5, num, out num2, IntPtr.Zero))
{
uSB_NODE_CONNECTION_DRIVERKEY_NAME = (USB_NODE_CONNECTION_DRIVERKEY_NAME)Marshal.PtrToStructure(intPtr5, typeof(USB_NODE_CONNECTION_DRIVERKEY_NAME));
uSBDevice.DeviceDriverKey = uSB_NODE_CONNECTION_DRIVERKEY_NAME.DriverKeyName;
uSBDevice.DeviceName = Acer_USB_Library.GetDescriptionByKeyName(uSBDevice.DeviceDriverKey);
uSBDevice.DeviceInstanceID = Acer_USB_Library.GetInstanceIDByKeyName(uSBDevice.DeviceDriverKey);
}
Marshal.FreeHGlobal(intPtr5);
Acer_USB_Library.CloseHandle(intPtr);
}
return(uSBDevice);
}
// return a down stream external hub
public USBDevice GetDevice()
{
if (!PortIsDeviceConnected)
{
return null;
}
USBDevice Device = new USBDevice();
// Copy over some values from the Port class
// Ya know, I've given some thought about making Device a derived class...
Device.DevicePortNumber = PortPortNumber;
Device.DeviceHubDevicePath = PortHubDevicePath;
Device.DeviceDescriptor = PortDeviceDescriptor;
// Open a handle to the Hub device
IntPtr h = CreateFile(PortHubDevicePath, GENERIC_WRITE, FILE_SHARE_WRITE, IntPtr.Zero, OPEN_EXISTING, 0, IntPtr.Zero);
if (h.ToInt32() != INVALID_HANDLE_VALUE)
{
int nBytesReturned;
int nBytes = BUFFER_SIZE;
// We use this to zero fill a buffer
string NullString = new string((char)0, BUFFER_SIZE / Marshal.SystemDefaultCharSize);
// The iManufacturer, iProduct and iSerialNumber entries in the
// Device Descriptor are really just indexes. So, we have to
// request a String Descriptor to get the values for those strings.
if (PortDeviceDescriptor.iManufacturer > 0)
{
// build a request for string descriptor
USB_DESCRIPTOR_REQUEST Request = new USB_DESCRIPTOR_REQUEST();
Request.ConnectionIndex = PortPortNumber;
Request.SetupPacket.wValue = (short)((USB_STRING_DESCRIPTOR_TYPE << 8) + PortDeviceDescriptor.iManufacturer);
Request.SetupPacket.wLength = (short)(nBytes - Marshal.SizeOf(Request));
Request.SetupPacket.wIndex = 0x409; // Language Code
// Geez, I wish C# had a Marshal.MemSet() method
IntPtr ptrRequest = Marshal.StringToHGlobalAuto(NullString);
Marshal.StructureToPtr(Request, ptrRequest, true);
// Use an IOCTL call to request the String Descriptor
if (DeviceIoControl(h, IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION, ptrRequest, nBytes, ptrRequest, nBytes, out nBytesReturned, IntPtr.Zero))
{
// The location of the string descriptor is immediately after
// the Request structure. Because this location is not "covered"
// by the structure allocation, we're forced to zero out this
// chunk of memory by using the StringToHGlobalAuto() hack above
IntPtr ptrStringDesc = new IntPtr(ptrRequest.ToInt32() + Marshal.SizeOf(Request));
USB_STRING_DESCRIPTOR StringDesc = (USB_STRING_DESCRIPTOR)Marshal.PtrToStructure(ptrStringDesc, typeof(USB_STRING_DESCRIPTOR));
Device.DeviceManufacturer = StringDesc.bString;
}
Marshal.FreeHGlobal(ptrRequest);
}
if (PortDeviceDescriptor.iProduct > 0)
{
// build a request for string descriptor
USB_DESCRIPTOR_REQUEST Request = new USB_DESCRIPTOR_REQUEST();
Request.ConnectionIndex = PortPortNumber;
Request.SetupPacket.wValue = (short)((USB_STRING_DESCRIPTOR_TYPE << 8) + PortDeviceDescriptor.iProduct);
Request.SetupPacket.wLength = (short)(nBytes - Marshal.SizeOf(Request));
Request.SetupPacket.wIndex = 0x409; // Language Code
// Geez, I wish C# had a Marshal.MemSet() method
IntPtr ptrRequest = Marshal.StringToHGlobalAuto(NullString);
Marshal.StructureToPtr(Request, ptrRequest, true);
// Use an IOCTL call to request the String Descriptor
if (DeviceIoControl(h, IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION, ptrRequest, nBytes, ptrRequest, nBytes, out nBytesReturned, IntPtr.Zero))
{
// the location of the string descriptor is immediately after the Request structure
IntPtr ptrStringDesc = new IntPtr(ptrRequest.ToInt32() + Marshal.SizeOf(Request));
USB_STRING_DESCRIPTOR StringDesc = (USB_STRING_DESCRIPTOR)Marshal.PtrToStructure(ptrStringDesc, typeof(USB_STRING_DESCRIPTOR));
Device.DeviceProduct = StringDesc.bString;
}
Marshal.FreeHGlobal(ptrRequest);
}
if (PortDeviceDescriptor.iSerialNumber > 0)
{
// build a request for string descriptor
USB_DESCRIPTOR_REQUEST Request = new USB_DESCRIPTOR_REQUEST();
Request.ConnectionIndex = PortPortNumber;
Request.SetupPacket.wValue = (short)((USB_STRING_DESCRIPTOR_TYPE << 8) + PortDeviceDescriptor.iSerialNumber);
Request.SetupPacket.wLength = (short)(nBytes - Marshal.SizeOf(Request));
Request.SetupPacket.wIndex = 0x409; // Language Code
// Geez, I wish C# had a Marshal.MemSet() method
IntPtr ptrRequest = Marshal.StringToHGlobalAuto(NullString);
Marshal.StructureToPtr(Request, ptrRequest, true);
// Use an IOCTL call to request the String Descriptor
if (DeviceIoControl(h, IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION, ptrRequest, nBytes, ptrRequest, nBytes, out nBytesReturned, IntPtr.Zero))
{
// the location of the string descriptor is immediately after the Request structure
IntPtr ptrStringDesc = new IntPtr(ptrRequest.ToInt32() + Marshal.SizeOf(Request));
USB_STRING_DESCRIPTOR StringDesc = (USB_STRING_DESCRIPTOR)Marshal.PtrToStructure(ptrStringDesc, typeof(USB_STRING_DESCRIPTOR));
Device.DeviceSerialNumber = StringDesc.bString;
}
Marshal.FreeHGlobal(ptrRequest);
}
// Get the Driver Key Name (usefull in locating a device)
USB_NODE_CONNECTION_DRIVERKEY_NAME DriverKey = new USB_NODE_CONNECTION_DRIVERKEY_NAME();
DriverKey.ConnectionIndex = PortPortNumber;
nBytes = Marshal.SizeOf(DriverKey);
IntPtr ptrDriverKey = Marshal.AllocHGlobal(nBytes);
Marshal.StructureToPtr(DriverKey, ptrDriverKey, true);
// Use an IOCTL call to request the Driver Key Name
if (DeviceIoControl(h, IOCTL_USB_GET_NODE_CONNECTION_DRIVERKEY_NAME, ptrDriverKey, nBytes, ptrDriverKey, nBytes, out nBytesReturned, IntPtr.Zero))
{
DriverKey = (USB_NODE_CONNECTION_DRIVERKEY_NAME)Marshal.PtrToStructure(ptrDriverKey, typeof(USB_NODE_CONNECTION_DRIVERKEY_NAME));
Device.DeviceDriverKey = DriverKey.DriverKeyName;
// use the DriverKeyName to get the Device Description and Instance ID
Device.DeviceName = GetDescriptionByKeyName(Device.DeviceDriverKey);
Device.DeviceInstanceID = GetInstanceIDByKeyName(Device.DeviceDriverKey);
}
Marshal.FreeHGlobal(ptrDriverKey);
CloseHandle(h);
}
return Device;
}
internal static extern Boolean DeviceIoControl(
IntPtr hFile,
Int32 dwIoControlCode,
ref USB_DESCRIPTOR_REQUEST lpInBuffer,
Int32 nInBufferSize,
ref USB_DESCRIPTOR_REQUEST lpOutBuffer,
Int32 nOutBufferSize,
out Int32 lpBytesReturned,
IntPtr lpOverlapped
);
/// <summary>
/// 获取字符串描述符
/// </summary>
/// <param name="hHubDevice">USB Hub设备句柄</param>
/// <param name="ConnectionIndex">连接索引号</param>
/// <param name="DescriptorIndex">描述符索引号</param>
/// <param name="LanguageID">语言ID</param>
/// <returns>字符串描述符</returns>
public static String GetStringDescriptor(IntPtr hHubDevice, Int32 ConnectionIndex, Byte DescriptorIndex, UInt16 LanguageID)
{
USB_DESCRIPTOR_REQUEST Buffer = new USB_DESCRIPTOR_REQUEST();
Buffer.ConnectionIndex = ConnectionIndex;
Buffer.SetupPacket.wValue = (UInt16)((USB_STRING_DESCRIPTOR_TYPE << 8) | DescriptorIndex);
Buffer.SetupPacket.wIndex = LanguageID;
Buffer.SetupPacket.wLength = MAXIMUM_USB_STRING_LENGTH;
Int32 nBytesReturned;
Boolean Status = DeviceIoControl(hHubDevice,
IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION,
ref Buffer,
Marshal.SizeOf(Buffer),
ref Buffer,
Marshal.SizeOf(Buffer),
out nBytesReturned,
IntPtr.Zero);
if (Status)
return Buffer.Data.bString;
else
return null;
}
// return a down stream external hub
public USBDevice GetDevice()
{
if (!PortIsDeviceConnected)
{
return(null);
}
// Copy over some values from the Port class
// Ya know, I've given some thought about making Device a derived class...
var Device = new USBDevice
{
DevicePortNumber = PortPortNumber,
DeviceHubDevicePath = PortHubDevicePath,
DeviceDescriptor = PortDeviceDescriptor
};
// Open a handle to the Hub device
var h = CreateFile(PortHubDevicePath, GENERIC_WRITE, FILE_SHARE_WRITE, IntPtr.Zero, OPEN_EXISTING, 0, IntPtr.Zero);
if (h.ToInt32() == INVALID_HANDLE_VALUE)
{
return(Device);
}
int nBytesReturned;
var nBytes = BUFFER_SIZE;
// We use this to zero fill a buffer
var NullString = new string((char)0, BUFFER_SIZE / Marshal.SystemDefaultCharSize);
// The iManufacturer, iProduct and iSerialNumber entries in the
// Device Descriptor are really just indexes. So, we have to
// request a String Descriptor to get the values for those strings.
if (PortDeviceDescriptor.iManufacturer > 0)
{
// build a request for string descriptor
var Request = new USB_DESCRIPTOR_REQUEST
{
ConnectionIndex = PortPortNumber,
SetupPacket =
{
wValue =
(short)((USB_STRING_DESCRIPTOR_TYPE << 8) + PortDeviceDescriptor.iManufacturer)
}
};
Request.SetupPacket.wLength = (short)(nBytes - Marshal.SizeOf(Request));
Request.SetupPacket.wIndex = 0x409; // Language Code
// Geez, I wish C# had a Marshal.MemSet() method
var ptrRequest = Marshal.StringToHGlobalAuto(NullString);
Marshal.StructureToPtr(Request, ptrRequest, true);
// Use an IOCTL call to request the String Descriptor
if (DeviceIoControl(h, IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION, ptrRequest, nBytes, ptrRequest, nBytes, out nBytesReturned, IntPtr.Zero))
{
// The location of the string descriptor is immediately after
// the Request structure. Because this location is not "covered"
// by the structure allocation, we're forced to zero out this
// chunk of memory by using the StringToHGlobalAuto() hack above
var ptrStringDesc = new IntPtr(ptrRequest.ToInt32() + Marshal.SizeOf(Request));
var StringDesc = (USB_STRING_DESCRIPTOR)Marshal.PtrToStructure(ptrStringDesc, typeof(USB_STRING_DESCRIPTOR));
Device.DeviceManufacturer = StringDesc.bString;
}
Marshal.FreeHGlobal(ptrRequest);
}
if (PortDeviceDescriptor.iProduct > 0)
{
// build a request for string descriptor
var Request = new USB_DESCRIPTOR_REQUEST
{
ConnectionIndex = PortPortNumber,
SetupPacket =
{
wValue = (short)((USB_STRING_DESCRIPTOR_TYPE << 8) + PortDeviceDescriptor.iProduct)
}
};
Request.SetupPacket.wLength = (short)(nBytes - Marshal.SizeOf(Request));
Request.SetupPacket.wIndex = 0x409; // Language Code
// Geez, I wish C# had a Marshal.MemSet() method
var ptrRequest = Marshal.StringToHGlobalAuto(NullString);
Marshal.StructureToPtr(Request, ptrRequest, true);
// Use an IOCTL call to request the String Descriptor
if (DeviceIoControl(h, IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION, ptrRequest, nBytes, ptrRequest, nBytes, out nBytesReturned, IntPtr.Zero))
{
// the location of the string descriptor is immediately after the Request structure
var ptrStringDesc = new IntPtr(ptrRequest.ToInt32() + Marshal.SizeOf(Request));
var StringDesc = (USB_STRING_DESCRIPTOR)Marshal.PtrToStructure(ptrStringDesc, typeof(USB_STRING_DESCRIPTOR));
Device.DeviceProduct = StringDesc.bString;
}
Marshal.FreeHGlobal(ptrRequest);
}
if (PortDeviceDescriptor.iSerialNumber > 0)
{
// build a request for string descriptor
var Request = new USB_DESCRIPTOR_REQUEST
{
ConnectionIndex = PortPortNumber,
SetupPacket =
{
wValue =
(short)((USB_STRING_DESCRIPTOR_TYPE << 8) + PortDeviceDescriptor.iSerialNumber)
}
};
Request.SetupPacket.wLength = (short)(nBytes - Marshal.SizeOf(Request));
Request.SetupPacket.wIndex = 0x409; // Language Code
// Geez, I wish C# had a Marshal.MemSet() method
var ptrRequest = Marshal.StringToHGlobalAuto(NullString);
Marshal.StructureToPtr(Request, ptrRequest, true);
// Use an IOCTL call to request the String Descriptor
if (DeviceIoControl(h, IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION, ptrRequest, nBytes, ptrRequest, nBytes, out nBytesReturned, IntPtr.Zero))
{
// the location of the string descriptor is immediately after the Request structure
var ptrStringDesc = new IntPtr(ptrRequest.ToInt32() + Marshal.SizeOf(Request));
var StringDesc = (USB_STRING_DESCRIPTOR)Marshal.PtrToStructure(ptrStringDesc, typeof(USB_STRING_DESCRIPTOR));
Device.DeviceSerialNumber = StringDesc.bString;
}
Marshal.FreeHGlobal(ptrRequest);
}
// Get the Driver Key Name (usefull in locating a device)
var DriverKey = new USB_NODE_CONNECTION_DRIVERKEY_NAME {
ConnectionIndex = PortPortNumber
};
nBytes = Marshal.SizeOf(DriverKey);
var ptrDriverKey = Marshal.AllocHGlobal(nBytes);
Marshal.StructureToPtr(DriverKey, ptrDriverKey, true);
// Use an IOCTL call to request the Driver Key Name
if (DeviceIoControl(h, IOCTL_USB_GET_NODE_CONNECTION_DRIVERKEY_NAME, ptrDriverKey, nBytes, ptrDriverKey, nBytes, out nBytesReturned, IntPtr.Zero))
{
DriverKey = (USB_NODE_CONNECTION_DRIVERKEY_NAME)Marshal.PtrToStructure(ptrDriverKey, typeof(USB_NODE_CONNECTION_DRIVERKEY_NAME));
Device.DeviceDriverKey = DriverKey.DriverKeyName;
// use the DriverKeyName to get the Device Description and Instance ID
Device.DeviceName = GetDescriptionByKeyName(Device.DeviceDriverKey);
Device.DeviceInstanceID = GetInstanceIDByKeyName(Device.DeviceDriverKey);
}
Marshal.FreeHGlobal(ptrDriverKey);
CloseHandle(h);
return(Device);
}
