---
title: GetInterfaceProtocol
framework: IOKit
role: symbol
role_heading: Instance Property
platforms: [Mac Catalyst 18.4+, macOS 10.14+]
path: iokit/iousbinterfaceinterface942/2977220-getinterfaceprotocol
---

# GetInterfaceProtocol

## Declaration

```occ
IOReturn (*GetInterfaceProtocol)(void *self, UInt8 *intfProtocol);
```