UsbBuildInterruptOrBulkTransferRequest - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// usbdlib.h
void UsbBuildInterruptOrBulkTransferRequest(
[in, out] urb,
[in] length,
[in] pipeHandle,
[in, optional] transferBuffer,
[in, optional] transferBufferMDL,
[in] transferBufferLength,
[in] transferFlags,
[in] link
);
View the official Windows Driver Kit DDI referenceNo description available.
The UsbBuildInterruptOrBulkTransferRequest macro formats an URB to send or receive data on a bulk pipe, or to receive data from an interrupt pipe.
urb [in, out]Pointer to an URB to be formatted as an interrupt or bulk transfer request.
length [in]Specifies the size, in bytes, of the URB.
pipeHandle [in]Specifies the handle for this pipe returned by the HCD when a configuration was selected.
transferBuffer [in, optional]Pointer to a resident buffer for the transfer or is NULL if an MDL is supplied in TransferBufferMDL. The contents of this buffer depend on the value of TransferFlags. If USBD_TRANSFER_DIRECTION_IN is specified, this buffer will contain data read from the device on return from the HCD. Otherwise, this buffer contains driver-supplied data to be transferred to the device.
transferBufferMDL [in, optional]Pointer to an MDL that describes a resident buffer or is NULL if a buffer is supplied in TransferBuffer. The contents of the buffer depend on the value of TransferFlags. If USBD_TRANSFER_DIRECTION_IN is specified, the described buffer will contain data read from the device on return from the HCD. Otherwise, the buffer contains driver-supplied data to be transferred to the device. The MDL must be allocated from nonpaged pool.
transferBufferLength [in]Specifies the length, in bytes, of the buffer specified in TransferBuffer or described in TransferBufferMDL.
transferFlags [in]Specifies zero, one, or a combination of the following flags:
Is set to request data from a device. To transfer data to a device, this flag must be clear.
Can be used if USBD_TRANSFER_DIRECTION_IN is set. If set, directs the HCD not to return an error if a packet is received from the device that is shorter than the maximum packet size for the endpoint. Otherwise, a short request returns an error condition.
link [in]Reserved. Must be set to NULL.
USB device driver programming reference