---
title: bRequest Shifts and Masks
framework: IOKit
role: containerSymbol
role_heading: Enumeration
platforms: [Mac Catalyst 18.4+, macOS 10.0+]
path: iokit/1425528-brequest_shifts_and_masks
---

# bRequest Shifts and Masks

## Declaration

```occ
enum : unsigned int {
    ...
};
```

## Topics

### Constants

- [kUSBRqDirnMask](iokit/1425528-brequest_shifts_and_masks/kusbrqdirnmask.md)
- [kUSBRqDirnShift](iokit/1425528-brequest_shifts_and_masks/kusbrqdirnshift.md)
- [kUSBRqRecipientMask](iokit/1425528-brequest_shifts_and_masks/kusbrqrecipientmask.md)
- [kUSBRqTypeMask](iokit/1425528-brequest_shifts_and_masks/kusbrqtypemask.md)
- [kUSBRqTypeShift](iokit/1425528-brequest_shifts_and_masks/kusbrqtypeshift.md)