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darling/platform-include/netinet/tcp_var.h
Lubos Dolezel 1fc33becf8 Initial commit, some libc modules building
2014-12-04 01:11:22 +01:00

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/*
* Copyright (c) 2000-2014 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* Copyright (c) 1982, 1986, 1993, 1994, 1995
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)tcp_var.h 8.4 (Berkeley) 5/24/95
* $FreeBSD: src/sys/netinet/tcp_var.h,v 1.56.2.8 2001/08/22 00:59:13 silby Exp $
*/
#ifndef _NETINET_TCP_VAR_H_
#define _NETINET_TCP_VAR_H_
#include <sys/appleapiopts.h>
#include <sys/queue.h>
#include <netinet/in_pcb.h>
#include <netinet/tcp_timer.h>
#if defined(__LP64__)
#define _TCPCB_PTR(x) u_int32_t
#define _TCPCB_LIST_HEAD(name, type) \
struct name { \
u_int32_t lh_first; \
};
#else
#define _TCPCB_PTR(x) x
#define _TCPCB_LIST_HEAD(name, type) LIST_HEAD(name, type)
#endif
struct tseg_qent;
_TCPCB_LIST_HEAD(tsegqe_head, tseg_qent);
struct tcpcb {
struct tsegqe_head t_segq;
int t_dupacks; /* consecutive dup acks recd */
u_int32_t unused; /* unused now: was t_template */
int t_timer[TCPT_NTIMERS_EXT]; /* tcp timers */
_TCPCB_PTR(struct inpcb *) t_inpcb; /* back pointer to internet pcb */
int t_state; /* state of this connection */
u_int t_flags;
#define TF_ACKNOW 0x00001 /* ack peer immediately */
#define TF_DELACK 0x00002 /* ack, but try to delay it */
#define TF_NODELAY 0x00004 /* don't delay packets to coalesce */
#define TF_NOOPT 0x00008 /* don't use tcp options */
#define TF_SENTFIN 0x00010 /* have sent FIN */
#define TF_REQ_SCALE 0x00020 /* have/will request window scaling */
#define TF_RCVD_SCALE 0x00040 /* other side has requested scaling */
#define TF_REQ_TSTMP 0x00080 /* have/will request timestamps */
#define TF_RCVD_TSTMP 0x00100 /* a timestamp was received in SYN */
#define TF_SACK_PERMIT 0x00200 /* other side said I could SACK */
#define TF_NEEDSYN 0x00400 /* send SYN (implicit state) */
#define TF_NEEDFIN 0x00800 /* send FIN (implicit state) */
#define TF_NOPUSH 0x01000 /* don't push */
#define TF_REQ_CC 0x02000 /* have/will request CC */
#define TF_RCVD_CC 0x04000 /* a CC was received in SYN */
#define TF_SENDCCNEW 0x08000 /* send CCnew instead of CC in SYN */
#define TF_MORETOCOME 0x10000 /* More data to be appended to sock */
#define TF_LQ_OVERFLOW 0x20000 /* listen queue overflow */
#define TF_RXWIN0SENT 0x40000 /* sent a receiver win 0 in response */
#define TF_SLOWLINK 0x80000 /* route is a on a modem speed link */
int t_force; /* 1 if forcing out a byte */
tcp_seq snd_una; /* send unacknowledged */
tcp_seq snd_max; /* highest sequence number sent;
* used to recognize retransmits
*/
tcp_seq snd_nxt; /* send next */
tcp_seq snd_up; /* send urgent pointer */
tcp_seq snd_wl1; /* window update seg seq number */
tcp_seq snd_wl2; /* window update seg ack number */
tcp_seq iss; /* initial send sequence number */
tcp_seq irs; /* initial receive sequence number */
tcp_seq rcv_nxt; /* receive next */
tcp_seq rcv_adv; /* advertised window */
u_int32_t rcv_wnd; /* receive window */
tcp_seq rcv_up; /* receive urgent pointer */
u_int32_t snd_wnd; /* send window */
u_int32_t snd_cwnd; /* congestion-controlled window */
u_int32_t snd_ssthresh; /* snd_cwnd size threshold for
* for slow start exponential to
* linear switch
*/
u_int t_maxopd; /* mss plus options */
u_int32_t t_rcvtime; /* time at which a packet was received */
u_int32_t t_starttime; /* time connection was established */
int t_rtttime; /* round trip time */
tcp_seq t_rtseq; /* sequence number being timed */
int t_rxtcur; /* current retransmit value (ticks) */
u_int t_maxseg; /* maximum segment size */
int t_srtt; /* smoothed round-trip time */
int t_rttvar; /* variance in round-trip time */
int t_rxtshift; /* log(2) of rexmt exp. backoff */
u_int t_rttmin; /* minimum rtt allowed */
u_int32_t t_rttupdated; /* number of times rtt sampled */
u_int32_t max_sndwnd; /* largest window peer has offered */
int t_softerror; /* possible error not yet reported */
/* out-of-band data */
char t_oobflags; /* have some */
char t_iobc; /* input character */
#define TCPOOB_HAVEDATA 0x01
#define TCPOOB_HADDATA 0x02
/* RFC 1323 variables */
u_char snd_scale; /* window scaling for send window */
u_char rcv_scale; /* window scaling for recv window */
u_char request_r_scale; /* pending window scaling */
u_char requested_s_scale;
u_int32_t ts_recent; /* timestamp echo data */
u_int32_t ts_recent_age; /* when last updated */
tcp_seq last_ack_sent;
/* RFC 1644 variables */
tcp_cc cc_send; /* send connection count */
tcp_cc cc_recv; /* receive connection count */
tcp_seq snd_recover; /* for use in fast recovery */
/* experimental */
u_int32_t snd_cwnd_prev; /* cwnd prior to retransmit */
u_int32_t snd_ssthresh_prev; /* ssthresh prior to retransmit */
u_int32_t t_badrxtwin; /* window for retransmit recovery */
};
/*
* TCP statistics.
* Many of these should be kept per connection,
* but that's inconvenient at the moment.
*/
struct tcpstat {
u_int32_t tcps_connattempt; /* connections initiated */
u_int32_t tcps_accepts; /* connections accepted */
u_int32_t tcps_connects; /* connections established */
u_int32_t tcps_drops; /* connections dropped */
u_int32_t tcps_conndrops; /* embryonic connections dropped */
u_int32_t tcps_closed; /* conn. closed (includes drops) */
u_int32_t tcps_segstimed; /* segs where we tried to get rtt */
u_int32_t tcps_rttupdated; /* times we succeeded */
u_int32_t tcps_delack; /* delayed acks sent */
u_int32_t tcps_timeoutdrop; /* conn. dropped in rxmt timeout */
u_int32_t tcps_rexmttimeo; /* retransmit timeouts */
u_int32_t tcps_persisttimeo; /* persist timeouts */
u_int32_t tcps_keeptimeo; /* keepalive timeouts */
u_int32_t tcps_keepprobe; /* keepalive probes sent */
u_int32_t tcps_keepdrops; /* connections dropped in keepalive */
u_int32_t tcps_sndtotal; /* total packets sent */
u_int32_t tcps_sndpack; /* data packets sent */
u_int32_t tcps_sndbyte; /* data bytes sent */
u_int32_t tcps_sndrexmitpack; /* data packets retransmitted */
u_int32_t tcps_sndrexmitbyte; /* data bytes retransmitted */
u_int32_t tcps_sndacks; /* ack-only packets sent */
u_int32_t tcps_sndprobe; /* window probes sent */
u_int32_t tcps_sndurg; /* packets sent with URG only */
u_int32_t tcps_sndwinup; /* window update-only packets sent */
u_int32_t tcps_sndctrl; /* control (SYN|FIN|RST) packets sent */
u_int32_t tcps_rcvtotal; /* total packets received */
u_int32_t tcps_rcvpack; /* packets received in sequence */
u_int32_t tcps_rcvbyte; /* bytes received in sequence */
u_int32_t tcps_rcvbadsum; /* packets received with ccksum errs */
u_int32_t tcps_rcvbadoff; /* packets received with bad offset */
u_int32_t tcps_rcvmemdrop; /* packets dropped for lack of memory */
u_int32_t tcps_rcvshort; /* packets received too short */
u_int32_t tcps_rcvduppack; /* duplicate-only packets received */
u_int32_t tcps_rcvdupbyte; /* duplicate-only bytes received */
u_int32_t tcps_rcvpartduppack; /* packets with some duplicate data */
u_int32_t tcps_rcvpartdupbyte; /* dup. bytes in part-dup. packets */
u_int32_t tcps_rcvoopack; /* out-of-order packets received */
u_int32_t tcps_rcvoobyte; /* out-of-order bytes received */
u_int32_t tcps_rcvpackafterwin; /* packets with data after window */
u_int32_t tcps_rcvbyteafterwin; /* bytes rcvd after window */
u_int32_t tcps_rcvafterclose; /* packets rcvd after "close" */
u_int32_t tcps_rcvwinprobe; /* rcvd window probe packets */
u_int32_t tcps_rcvdupack; /* rcvd duplicate acks */
u_int32_t tcps_rcvacktoomuch; /* rcvd acks for unsent data */
u_int32_t tcps_rcvackpack; /* rcvd ack packets */
u_int32_t tcps_rcvackbyte; /* bytes acked by rcvd acks */
u_int32_t tcps_rcvwinupd; /* rcvd window update packets */
u_int32_t tcps_pawsdrop; /* segments dropped due to PAWS */
u_int32_t tcps_predack; /* times hdr predict ok for acks */
u_int32_t tcps_preddat; /* times hdr predict ok for data pkts */
u_int32_t tcps_pcbcachemiss;
u_int32_t tcps_cachedrtt; /* times cached RTT in route updated */
u_int32_t tcps_cachedrttvar; /* times cached rttvar updated */
u_int32_t tcps_cachedssthresh; /* times cached ssthresh updated */
u_int32_t tcps_usedrtt; /* times RTT initialized from route */
u_int32_t tcps_usedrttvar; /* times RTTVAR initialized from rt */
u_int32_t tcps_usedssthresh; /* times ssthresh initialized from rt*/
u_int32_t tcps_persistdrop; /* timeout in persist state */
u_int32_t tcps_badsyn; /* bogus SYN, e.g. premature ACK */
u_int32_t tcps_mturesent; /* resends due to MTU discovery */
u_int32_t tcps_listendrop; /* listen queue overflows */
/* new stats from FreeBSD 5.4 sync up */
u_int32_t tcps_minmssdrops; /* average minmss too low drops */
u_int32_t tcps_sndrexmitbad; /* unnecessary packet retransmissions */
u_int32_t tcps_badrst; /* ignored RSTs in the window */
u_int32_t tcps_sc_added; /* entry added to syncache */
u_int32_t tcps_sc_retransmitted; /* syncache entry was retransmitted */
u_int32_t tcps_sc_dupsyn; /* duplicate SYN packet */
u_int32_t tcps_sc_dropped; /* could not reply to packet */
u_int32_t tcps_sc_completed; /* successful extraction of entry */
u_int32_t tcps_sc_bucketoverflow; /* syncache per-bucket limit hit */
u_int32_t tcps_sc_cacheoverflow; /* syncache cache limit hit */
u_int32_t tcps_sc_reset; /* RST removed entry from syncache */
u_int32_t tcps_sc_stale; /* timed out or listen socket gone */
u_int32_t tcps_sc_aborted; /* syncache entry aborted */
u_int32_t tcps_sc_badack; /* removed due to bad ACK */
u_int32_t tcps_sc_unreach; /* ICMP unreachable received */
u_int32_t tcps_sc_zonefail; /* zalloc() failed */
u_int32_t tcps_sc_sendcookie; /* SYN cookie sent */
u_int32_t tcps_sc_recvcookie; /* SYN cookie received */
u_int32_t tcps_hc_added; /* entry added to hostcache */
u_int32_t tcps_hc_bucketoverflow; /* hostcache per bucket limit hit */
/* SACK related stats */
u_int32_t tcps_sack_recovery_episode; /* SACK recovery episodes */
u_int32_t tcps_sack_rexmits; /* SACK rexmit segments */
u_int32_t tcps_sack_rexmit_bytes; /* SACK rexmit bytes */
u_int32_t tcps_sack_rcv_blocks; /* SACK blocks (options) received */
u_int32_t tcps_sack_send_blocks; /* SACK blocks (options) sent */
u_int32_t tcps_sack_sboverflow; /* SACK sendblock overflow */
u_int32_t tcps_bg_rcvtotal; /* total background packets received */
u_int32_t tcps_rxtfindrop; /* drop conn after retransmitting FIN */
u_int32_t tcps_fcholdpacket; /* packets withheld because of flow control */
/* LRO related stats */
u_int32_t tcps_coalesced_pack; /* number of coalesced packets */
u_int32_t tcps_flowtbl_full; /* times flow table was full */
u_int32_t tcps_flowtbl_collision; /* collisions in flow tbl */
u_int32_t tcps_lro_twopack; /* 2 packets coalesced */
u_int32_t tcps_lro_multpack; /* 3 or 4 pkts coalesced */
u_int32_t tcps_lro_largepack; /* 5 or more pkts coalesced */
u_int32_t tcps_limited_txt; /* Limited transmit used */
u_int32_t tcps_early_rexmt; /* Early retransmit used */
u_int32_t tcps_sack_ackadv; /* Cumulative ack advanced along with sack */
/* Checksum related stats */
u_int32_t tcps_rcv_swcsum; /* tcp swcksum (inbound), packets */
u_int32_t tcps_rcv_swcsum_bytes; /* tcp swcksum (inbound), bytes */
u_int32_t tcps_rcv6_swcsum; /* tcp6 swcksum (inbound), packets */
u_int32_t tcps_rcv6_swcsum_bytes; /* tcp6 swcksum (inbound), bytes */
u_int32_t tcps_snd_swcsum; /* tcp swcksum (outbound), packets */
u_int32_t tcps_snd_swcsum_bytes; /* tcp swcksum (outbound), bytes */
u_int32_t tcps_snd6_swcsum; /* tcp6 swcksum (outbound), packets */
u_int32_t tcps_snd6_swcsum_bytes; /* tcp6 swcksum (outbound), bytes */
u_int32_t tcps_msg_unopkts; /* unordered packet on TCP msg stream */
u_int32_t tcps_msg_unoappendfail; /* failed to append unordered pkt */
u_int32_t tcps_msg_sndwaithipri; /* send is waiting for high priority data */
/* MPTCP Related stats */
u_int32_t tcps_invalid_mpcap; /* Invalid MPTCP capable opts */
u_int32_t tcps_invalid_joins; /* Invalid MPTCP joins */
u_int32_t tcps_mpcap_fallback; /* TCP fallback in primary */
u_int32_t tcps_join_fallback; /* No MPTCP in secondary */
u_int32_t tcps_estab_fallback; /* DSS option dropped */
u_int32_t tcps_invalid_opt; /* Catchall error stat */
u_int32_t tcps_mp_outofwin; /* Packet lies outside the
shared recv window */
u_int32_t tcps_mp_reducedwin; /* Reduced subflow window */
u_int32_t tcps_mp_badcsum; /* Bad DSS csum */
u_int32_t tcps_mp_oodata; /* Out of order data */
u_int32_t tcps_mp_switches; /* number of subflow switch */
u_int32_t tcps_mp_rcvtotal; /* number of rcvd packets */
u_int32_t tcps_mp_rcvbytes; /* number of bytes received */
u_int32_t tcps_mp_sndpacks; /* number of data packs sent */
u_int32_t tcps_mp_sndbytes; /* number of bytes sent */
u_int32_t tcps_join_rxmts; /* join ack retransmits */
u_int32_t tcps_tailloss_rto; /* RTO due to tail loss */
u_int32_t tcps_reordered_pkts; /* packets reorderd */
u_int32_t tcps_recovered_pkts; /* recovered after loss */
u_int32_t tcps_pto; /* probe timeout */
u_int32_t tcps_rto_after_pto; /* RTO after a probe */
u_int32_t tcps_tlp_recovery; /* TLP induced fast recovery */
u_int32_t tcps_tlp_recoverlastpkt; /* TLP recoverd last pkt */
u_int32_t tcps_ecn_setup; /* connection negotiated ECN */
u_int32_t tcps_sent_cwr; /* Sent CWR, ECE received */
u_int32_t tcps_sent_ece; /* Sent ECE notification */
u_int32_t tcps_detect_reordering; /* Detect pkt reordering */
u_int32_t tcps_delay_recovery; /* Delay fast recovery */
u_int32_t tcps_avoid_rxmt; /* Retransmission was avoided */
u_int32_t tcps_unnecessary_rxmt; /* Retransmission was not needed */
u_int32_t tcps_nostretchack; /* disabled stretch ack algorithm on a connection */
u_int32_t tcps_rescue_rxmt; /* SACK rescue retransmit */
u_int32_t tcps_pto_in_recovery; /* PTO during fast recovery */
u_int32_t tcps_pmtudbh_reverted; /* PMTU Blackhole detection, segement size reverted */
};
struct tcpstat_local {
u_int64_t badformat;
u_int64_t unspecv6;
u_int64_t synfin;
u_int64_t badformatipsec;
u_int64_t noconnnolist;
u_int64_t noconnlist;
u_int64_t listbadsyn;
u_int64_t icmp6unreach;
u_int64_t deprecate6;
u_int64_t ooopacket;
u_int64_t rstinsynrcv;
u_int64_t dospacket;
u_int64_t cleanup;
u_int64_t synwindow;
};
#pragma pack(4)
/*
* TCB structure exported to user-land via sysctl(3).
* Evil hack: declare only if in_pcb.h and sys/socketvar.h have been
* included. Not all of our clients do.
*/
struct xtcpcb {
u_int32_t xt_len;
struct inpcb xt_inp;
struct tcpcb xt_tp;
struct xsocket xt_socket;
u_quad_t xt_alignment_hack;
};
#if !CONFIG_EMBEDDED
struct xtcpcb64 {
u_int32_t xt_len;
struct xinpcb64 xt_inpcb;
u_int64_t t_segq;
int t_dupacks; /* consecutive dup acks recd */
int t_timer[TCPT_NTIMERS_EXT]; /* tcp timers */
int t_state; /* state of this connection */
u_int t_flags;
int t_force; /* 1 if forcing out a byte */
tcp_seq snd_una; /* send unacknowledged */
tcp_seq snd_max; /* highest sequence number sent;
* used to recognize retransmits
*/
tcp_seq snd_nxt; /* send next */
tcp_seq snd_up; /* send urgent pointer */
tcp_seq snd_wl1; /* window update seg seq number */
tcp_seq snd_wl2; /* window update seg ack number */
tcp_seq iss; /* initial send sequence number */
tcp_seq irs; /* initial receive sequence number */
tcp_seq rcv_nxt; /* receive next */
tcp_seq rcv_adv; /* advertised window */
u_int32_t rcv_wnd; /* receive window */
tcp_seq rcv_up; /* receive urgent pointer */
u_int32_t snd_wnd; /* send window */
u_int32_t snd_cwnd; /* congestion-controlled window */
u_int32_t snd_ssthresh; /* snd_cwnd size threshold for
* for slow start exponential to
* linear switch
*/
u_int t_maxopd; /* mss plus options */
u_int32_t t_rcvtime; /* time at which a packet was received */
u_int32_t t_starttime; /* time connection was established */
int t_rtttime; /* round trip time */
tcp_seq t_rtseq; /* sequence number being timed */
int t_rxtcur; /* current retransmit value (ticks) */
u_int t_maxseg; /* maximum segment size */
int t_srtt; /* smoothed round-trip time */
int t_rttvar; /* variance in round-trip time */
int t_rxtshift; /* log(2) of rexmt exp. backoff */
u_int t_rttmin; /* minimum rtt allowed */
u_int32_t t_rttupdated; /* number of times rtt sampled */
u_int32_t max_sndwnd; /* largest window peer has offered */
int t_softerror; /* possible error not yet reported */
/* out-of-band data */
char t_oobflags; /* have some */
char t_iobc; /* input character */
/* RFC 1323 variables */
u_char snd_scale; /* window scaling for send window */
u_char rcv_scale; /* window scaling for recv window */
u_char request_r_scale; /* pending window scaling */
u_char requested_s_scale;
u_int32_t ts_recent; /* timestamp echo data */
u_int32_t ts_recent_age; /* when last updated */
tcp_seq last_ack_sent;
/* RFC 1644 variables */
tcp_cc cc_send; /* send connection count */
tcp_cc cc_recv; /* receive connection count */
tcp_seq snd_recover; /* for use in fast recovery */
/* experimental */
u_int32_t snd_cwnd_prev; /* cwnd prior to retransmit */
u_int32_t snd_ssthresh_prev; /* ssthresh prior to retransmit */
u_int32_t t_badrxtwin; /* window for retransmit recovery */
u_quad_t xt_alignment_hack;
};
#endif /* !CONFIG_EMBEDDED */
#pragma pack()
/*
* Names for TCP sysctl objects
*/
#define TCPCTL_DO_RFC1323 1 /* use RFC-1323 extensions */
#define TCPCTL_DO_RFC1644 2 /* use RFC-1644 extensions */
#define TCPCTL_MSSDFLT 3 /* MSS default */
#define TCPCTL_STATS 4 /* statistics (read-only) */
#define TCPCTL_RTTDFLT 5 /* default RTT estimate */
#define TCPCTL_KEEPIDLE 6 /* keepalive idle timer */
#define TCPCTL_KEEPINTVL 7 /* interval to send keepalives */
#define TCPCTL_SENDSPACE 8 /* send buffer space */
#define TCPCTL_RECVSPACE 9 /* receive buffer space */
#define TCPCTL_KEEPINIT 10 /* timeout for establishing syn */
#define TCPCTL_PCBLIST 11 /* list of all outstanding PCBs */
#define TCPCTL_DELACKTIME 12 /* time before sending delayed ACK */
#define TCPCTL_V6MSSDFLT 13 /* MSS default for IPv6 */
#define TCPCTL_MAXID 14
#endif /* _NETINET_TCP_VAR_H_ */
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