GUsb.Device.control_transfer

### Method

# GUsb Devicecontrol_transfer

since: 0.1.0

#### Declaration

    gboolean
    g_usb_device_control_transfer (
      GUsbDevice* self,
      GUsbDeviceDirection direction,
      GUsbDeviceRequestType request_type,
      GUsbDeviceRecipient recipient,
      guint8 request,
      guint16 value,
      guint16 idx,
      guint8* data,
      gsize length,
      gsize* actual_length,
      guint timeout,
      GCancellable* cancellable,
      GError** error
    )

#### Description

Perform a USB control transfer.

Warning: this function is synchronous, and cannot be cancelled.

Available since: 0.1.0

#### Parameters

`direction`

  Type: `GUsbDeviceDirection`

  No description available.

`request_type`

  Type: `GUsbDeviceRequestType`

  The request type field for the setup packet.

`recipient`

  Type: `GUsbDeviceRecipient`

  No description available.

`request`

  Type: `guint8`

  The request field for the setup packet.

`value`

  Type: `guint16`

  The value field for the setup packet.

`idx`

  Type: `guint16`

  The index field for the setup packet.

`data`

  Type: An array of `guint8`

  A suitably-sized data buffer for either input or output.

  The length of the array is specified in the `length` argument.
  The data is owned by the caller of the function.

`length`

  Type: `gsize`

  The length field for the setup packet.

`actual_length`

  Type: `gsize*`

  The actual number of bytes sent, or `NULL`.

  The argument will be set by the function.
  The argument can be `NULL`.

`timeout`

  Type: `guint`

  Timeout timeout (in milliseconds) that this function should wait before giving up due to no response being received. For an unlimited timeout, use 0.

`cancellable`

  Type: `GCancellable`

  A `GCancellable`, or `NULL`.

  The argument can be `NULL`.
  The data is owned by the caller of the function.

`error`

  Type: `GError **`

  The return location for a recoverable error.

  The argument can be `NULL`.
  If the return location is not `NULL`, then you must initialize it to a `NULL` `GError*`.
  The argument will left initialized to `NULL` by the method if there are no errors.
  In case of error, the argument will be set to a newly allocated `GError`; the caller will take ownership of the data, and be responsible for freeing it.

#### Return value

Type: `gboolean`

`TRUE` on success.