---
title: rt_msghdr_ext
framework: Kernel
role: symbol
platforms: [macOS 13.0+]
path: kernel/rt_msghdr_ext
---

# rt_msghdr_ext

## Declaration

```occ
struct rt_msghdr_ext {
    ...
};
```

## Topics

### Instance Properties

- [rtm_addrs](kernel/rt_msghdr_ext/3944315-rtm_addrs.md)
- [rtm_errno](kernel/rt_msghdr_ext/3944316-rtm_errno.md)
- [rtm_flags](kernel/rt_msghdr_ext/3944317-rtm_flags.md)
- [rtm_index](kernel/rt_msghdr_ext/3944318-rtm_index.md)
- [rtm_inits](kernel/rt_msghdr_ext/3944319-rtm_inits.md)
- [rtm_msglen](kernel/rt_msghdr_ext/3944320-rtm_msglen.md)
- [rtm_pid](kernel/rt_msghdr_ext/3944321-rtm_pid.md)
- [rtm_reserved](kernel/rt_msghdr_ext/3944322-rtm_reserved.md)
- [rtm_ri](kernel/rt_msghdr_ext/3944323-rtm_ri.md)
- [rtm_rmx](kernel/rt_msghdr_ext/3944324-rtm_rmx.md)
- [rtm_seq](kernel/rt_msghdr_ext/3944325-rtm_seq.md)
- [rtm_type](kernel/rt_msghdr_ext/3944326-rtm_type.md)
- [rtm_use](kernel/rt_msghdr_ext/3944327-rtm_use.md)
- [rtm_version](kernel/rt_msghdr_ext/3944328-rtm_version.md)