---
title: tcphdr
framework: Kernel
role: symbol
platforms: [macOS 10.6+]
path: kernel/tcphdr
---

# tcphdr

## Declaration

```occ
struct tcphdr {
    ...
};
```

## Topics

### Instance Properties

- [th_ack](kernel/tcphdr/1562047-th_ack.md)
- [th_dport](kernel/tcphdr/1562019-th_dport.md)
- [th_flags](kernel/tcphdr/1562022-th_flags.md)
- [th_off](kernel/tcphdr/1562051-th_off.md)
- [th_seq](kernel/tcphdr/1561964-th_seq.md)
- [th_sport](kernel/tcphdr/1561984-th_sport.md)
- [th_sum](kernel/tcphdr/1562049-th_sum.md)
- [th_urp](kernel/tcphdr/1561957-th_urp.md)
- [th_win](kernel/tcphdr/1562017-th_win.md)
- [th_x2](kernel/tcphdr/1561978-th_x2.md)