---
title: tcps_tfo_cookie_invalid
framework: Kernel
role: symbol
role_heading: Instance Property
platforms: [macOS 12.0+]
path: kernel/tcpstat/3754978-tcps_tfo_cookie_invalid
---

# tcps_tfo_cookie_invalid

## Declaration

```occ
u_int32_t tcps_tfo_cookie_invalid;
```