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

# nd_opt_rd_hdr

## Declaration

```occ
struct nd_opt_rd_hdr {
    ...
};
```

## Topics

### Instance Properties

- [nd_opt_rh_len](kernel/nd_opt_rd_hdr/3754149-nd_opt_rh_len.md)
- [nd_opt_rh_reserved1](kernel/nd_opt_rd_hdr/3754150-nd_opt_rh_reserved1.md)
- [nd_opt_rh_reserved2](kernel/nd_opt_rd_hdr/3754151-nd_opt_rh_reserved2.md)
- [nd_opt_rh_type](kernel/nd_opt_rd_hdr/3754152-nd_opt_rh_type.md)