---
title: xtcpcb64
framework: Kernel
role: symbol
platforms: [macOS 12.0+]
path: kernel/xtcpcb64
---

# xtcpcb64

## Declaration

```occ
struct xtcpcb64 {
    ...
};
```

## Topics

### Instance Properties

- [cc_recv](kernel/xtcpcb64/3755034-cc_recv.md)
- [cc_send](kernel/xtcpcb64/3755035-cc_send.md)
- [irs](kernel/xtcpcb64/3755036-irs.md)
- [iss](kernel/xtcpcb64/3755037-iss.md)
- [last_ack_sent](kernel/xtcpcb64/3755038-last_ack_sent.md)
- [max_sndwnd](kernel/xtcpcb64/3755039-max_sndwnd.md)
- [rcv_adv](kernel/xtcpcb64/3755040-rcv_adv.md)
- [rcv_nxt](kernel/xtcpcb64/3755041-rcv_nxt.md)
- [rcv_scale](kernel/xtcpcb64/3755042-rcv_scale.md)
- [rcv_up](kernel/xtcpcb64/3755043-rcv_up.md)
- [rcv_wnd](kernel/xtcpcb64/3755044-rcv_wnd.md)
- [request_r_scale](kernel/xtcpcb64/3755045-request_r_scale.md)
- [requested_s_scale](kernel/xtcpcb64/3755046-requested_s_scale.md)
- [snd_cwnd](kernel/xtcpcb64/3755047-snd_cwnd.md)
- [snd_cwnd_prev](kernel/xtcpcb64/3755048-snd_cwnd_prev.md)
- [snd_max](kernel/xtcpcb64/3755049-snd_max.md)
- [snd_nxt](kernel/xtcpcb64/3755050-snd_nxt.md)
- [snd_recover](kernel/xtcpcb64/3755051-snd_recover.md)
- [snd_scale](kernel/xtcpcb64/3755052-snd_scale.md)
- [snd_ssthresh](kernel/xtcpcb64/3755053-snd_ssthresh.md)
- [snd_ssthresh_prev](kernel/xtcpcb64/3755054-snd_ssthresh_prev.md)
- [snd_una](kernel/xtcpcb64/3755055-snd_una.md)
- [snd_up](kernel/xtcpcb64/3755056-snd_up.md)
- [snd_wl1](kernel/xtcpcb64/3755057-snd_wl1.md)
- [snd_wl2](kernel/xtcpcb64/3755058-snd_wl2.md)
- [snd_wnd](kernel/xtcpcb64/3755059-snd_wnd.md)
- [t_badrxtwin](kernel/xtcpcb64/3755060-t_badrxtwin.md)
- [t_dupacks](kernel/xtcpcb64/3755061-t_dupacks.md)
- [t_flags](kernel/xtcpcb64/3755062-t_flags.md)
- [t_force](kernel/xtcpcb64/3755063-t_force.md)
- [t_iobc](kernel/xtcpcb64/3755064-t_iobc.md)
- [t_maxopd](kernel/xtcpcb64/3755065-t_maxopd.md)
- [t_maxseg](kernel/xtcpcb64/3755066-t_maxseg.md)
- [t_oobflags](kernel/xtcpcb64/3755067-t_oobflags.md)
- [t_rcvtime](kernel/xtcpcb64/3755068-t_rcvtime.md)
- [t_rtseq](kernel/xtcpcb64/3755069-t_rtseq.md)
- [t_rttmin](kernel/xtcpcb64/3755070-t_rttmin.md)
- [t_rtttime](kernel/xtcpcb64/3755071-t_rtttime.md)
- [t_rttupdated](kernel/xtcpcb64/3755072-t_rttupdated.md)
- [t_rttvar](kernel/xtcpcb64/3755073-t_rttvar.md)
- [t_rxtcur](kernel/xtcpcb64/3755074-t_rxtcur.md)
- [t_rxtshift](kernel/xtcpcb64/3755075-t_rxtshift.md)
- [t_segq](kernel/xtcpcb64/3755076-t_segq.md)
- [t_softerror](kernel/xtcpcb64/3755077-t_softerror.md)
- [t_srtt](kernel/xtcpcb64/3755078-t_srtt.md)
- [t_starttime](kernel/xtcpcb64/3755079-t_starttime.md)
- [t_state](kernel/xtcpcb64/3755080-t_state.md)
- [t_timer](kernel/xtcpcb64/3755081-t_timer.md)
- [ts_recent](kernel/xtcpcb64/3755082-ts_recent.md)
- [ts_recent_age](kernel/xtcpcb64/3755083-ts_recent_age.md)
- [xt_alignment_hack](kernel/xtcpcb64/3755084-xt_alignment_hack.md)
- [xt_inpcb](kernel/xtcpcb64/3755085-xt_inpcb.md)
- [xt_len](kernel/xtcpcb64/3755086-xt_len.md)