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

# tcpcb

## Declaration

```occ
struct tcpcb {
    ...
};
```

## Topics

### Instance Properties

- [cc_recv](kernel/tcpcb/3754722-cc_recv.md)
- [cc_send](kernel/tcpcb/3754723-cc_send.md)
- [irs](kernel/tcpcb/3754724-irs.md)
- [iss](kernel/tcpcb/3754725-iss.md)
- [last_ack_sent](kernel/tcpcb/3754726-last_ack_sent.md)
- [max_sndwnd](kernel/tcpcb/3754727-max_sndwnd.md)
- [rcv_adv](kernel/tcpcb/3754728-rcv_adv.md)
- [rcv_nxt](kernel/tcpcb/3754729-rcv_nxt.md)
- [rcv_scale](kernel/tcpcb/3754730-rcv_scale.md)
- [rcv_up](kernel/tcpcb/3754731-rcv_up.md)
- [rcv_wnd](kernel/tcpcb/3754732-rcv_wnd.md)
- [request_r_scale](kernel/tcpcb/3754733-request_r_scale.md)
- [requested_s_scale](kernel/tcpcb/3754734-requested_s_scale.md)
- [snd_cwnd](kernel/tcpcb/3754735-snd_cwnd.md)
- [snd_cwnd_prev](kernel/tcpcb/3754736-snd_cwnd_prev.md)
- [snd_max](kernel/tcpcb/3754737-snd_max.md)
- [snd_nxt](kernel/tcpcb/3754738-snd_nxt.md)
- [snd_recover](kernel/tcpcb/3754739-snd_recover.md)
- [snd_scale](kernel/tcpcb/3754740-snd_scale.md)
- [snd_ssthresh](kernel/tcpcb/3754741-snd_ssthresh.md)
- [snd_ssthresh_prev](kernel/tcpcb/3754742-snd_ssthresh_prev.md)
- [snd_una](kernel/tcpcb/3754743-snd_una.md)
- [snd_up](kernel/tcpcb/3754744-snd_up.md)
- [snd_wl1](kernel/tcpcb/3754745-snd_wl1.md)
- [snd_wl2](kernel/tcpcb/3754746-snd_wl2.md)
- [snd_wnd](kernel/tcpcb/3754747-snd_wnd.md)
- [t_badrxtwin](kernel/tcpcb/3754748-t_badrxtwin.md)
- [t_dupacks](kernel/tcpcb/3754749-t_dupacks.md)
- [t_flags](kernel/tcpcb/3754750-t_flags.md)
- [t_force](kernel/tcpcb/3754751-t_force.md)
- [t_inpcb](kernel/tcpcb/3754752-t_inpcb.md)
- [t_iobc](kernel/tcpcb/3754753-t_iobc.md)
- [t_maxopd](kernel/tcpcb/3754754-t_maxopd.md)
- [t_maxseg](kernel/tcpcb/3754755-t_maxseg.md)
- [t_oobflags](kernel/tcpcb/3754756-t_oobflags.md)
- [t_rcvtime](kernel/tcpcb/3754757-t_rcvtime.md)
- [t_rtseq](kernel/tcpcb/3754758-t_rtseq.md)
- [t_rttmin](kernel/tcpcb/3754759-t_rttmin.md)
- [t_rtttime](kernel/tcpcb/3754760-t_rtttime.md)
- [t_rttupdated](kernel/tcpcb/3754761-t_rttupdated.md)
- [t_rttvar](kernel/tcpcb/3754762-t_rttvar.md)
- [t_rxtcur](kernel/tcpcb/3754763-t_rxtcur.md)
- [t_rxtshift](kernel/tcpcb/3754764-t_rxtshift.md)
- [t_segq](kernel/tcpcb/3754765-t_segq.md)
- [t_softerror](kernel/tcpcb/3754766-t_softerror.md)
- [t_srtt](kernel/tcpcb/3754767-t_srtt.md)
- [t_starttime](kernel/tcpcb/3754768-t_starttime.md)
- [t_state](kernel/tcpcb/3754769-t_state.md)
- [t_timer](kernel/tcpcb/3754770-t_timer.md)
- [ts_recent](kernel/tcpcb/3754771-ts_recent.md)
- [ts_recent_age](kernel/tcpcb/3754772-ts_recent_age.md)
- [unused](kernel/tcpcb/3754773-unused.md)