---
title: nd_opt_hdr
framework: Kernel
role: symbol
platforms: [macOS 12.0+]
path: kernel/nd_opt_hdr
---

# nd_opt_hdr

## Declaration

```occ
struct nd_opt_hdr {
    ...
};
```

## Topics

### Instance Properties

- [nd_opt_len](kernel/nd_opt_hdr/3754123-nd_opt_len.md)
- [nd_opt_type](kernel/nd_opt_hdr/3754124-nd_opt_type.md)