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_URB_CONTROL_GET_CONFIGURATION_REQUEST structure

The _URB_CONTROL_GET_CONFIGURATION_REQUEST structure is used by USB client drivers to retrieve the current configuration for a device.

Syntax


struct _URB_CONTROL_GET_CONFIGURATION_REQUEST {
  struct URB_HEADER  Hdr;
  PVOID               Reserved;
  ULONG               Reserved0;
  ULONG               TransferBufferLength;
  PVOID               TransferBuffer;
  PMDL                TransferBufferMDL;
  struct URB  *UrbLink;
  struct URB_HCD_AREA  hca;
  UCHAR               Reserved1[8];
};

Members

Hdr

Pointer to a _URB_HEADER structure that specifies the URB header information. Hdr.Function must be set to URB_FUNCTION_GET_CONFIGURATION.

Hdr.Length must equal sizeof(_URB_CONTROL_GET_CONFIGURATION_REQUEST).

Reserved

Reserved. Do not use.

Reserved0

Reserved. Do not use.

TransferBufferLength

Must be 1. This member specifies the length, in bytes, of the buffer specified in TransferBuffer or described in TransferBufferMDL.

TransferBuffer

Pointer to a resident buffer for the transfer or is NULL if an MDL is supplied in TransferBufferMDL. The bus driver returns a single byte that specifies the index of the current configuration.

TransferBufferMDL

Pointer to an MDL that describes a resident buffer or is NULL if a buffer is supplied in TransferBuffer. The bus driver returns a single byte that specifies the index of the current configuration. This MDL must be allocated from nonpaged pool.

UrbLink

Reserved. Do not use.

hca

Reserved. Do not use.

Reserved1

Reserved. Do not use.

Remarks

The reserved members of this structure must be treated as opaque and are reserved for system use.

Requirements

Header

Usb.h (include Usb.h)

See also

URB
_URB_HEADER
USB Structures

 

 

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