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| Source at commit 2862 created 7 years 25 days ago. By ifabio, Tag 2.3 release, bump svn to 2.4 | |
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| 1 | /*␊ |
| 2 | * Copyright (c) 2000-2008 Apple Inc. All rights reserved.␊ |
| 3 | *␊ |
| 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@␊ |
| 5 | * ␊ |
| 6 | * This file contains Original Code and/or Modifications of Original Code␊ |
| 7 | * as defined in and that are subject to the Apple Public Source License␊ |
| 8 | * Version 2.0 (the 'License'). You may not use this file except in␊ |
| 9 | * compliance with the License. The rights granted to you under the License␊ |
| 10 | * may not be used to create, or enable the creation or redistribution of,␊ |
| 11 | * unlawful or unlicensed copies of an Apple operating system, or to␊ |
| 12 | * circumvent, violate, or enable the circumvention or violation of, any␊ |
| 13 | * terms of an Apple operating system software license agreement.␊ |
| 14 | * ␊ |
| 15 | * Please obtain a copy of the License at␊ |
| 16 | * http://www.opensource.apple.com/apsl/ and read it before using this file.␊ |
| 17 | * ␊ |
| 18 | * The Original Code and all software distributed under the License are␊ |
| 19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
| 20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
| 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
| 22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.␊ |
| 23 | * Please see the License for the specific language governing rights and␊ |
| 24 | * limitations under the License.␊ |
| 25 | * ␊ |
| 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@␊ |
| 27 | */␊ |
| 28 | /*␊ |
| 29 | * Copyright (c) 1982, 1986, 1993, 1994, 1995␊ |
| 30 | *␉The Regents of the University of California. All rights reserved.␊ |
| 31 | *␊ |
| 32 | * Redistribution and use in source and binary forms, with or without␊ |
| 33 | * modification, are permitted provided that the following conditions␊ |
| 34 | * are met:␊ |
| 35 | * 1. Redistributions of source code must retain the above copyright␊ |
| 36 | * notice, this list of conditions and the following disclaimer.␊ |
| 37 | * 2. Redistributions in binary form must reproduce the above copyright␊ |
| 38 | * notice, this list of conditions and the following disclaimer in the␊ |
| 39 | * documentation and/or other materials provided with the distribution.␊ |
| 40 | * 3. All advertising materials mentioning features or use of this software␊ |
| 41 | * must display the following acknowledgement:␊ |
| 42 | *␉This product includes software developed by the University of␊ |
| 43 | *␉California, Berkeley and its contributors.␊ |
| 44 | * 4. Neither the name of the University nor the names of its contributors␊ |
| 45 | * may be used to endorse or promote products derived from this software␊ |
| 46 | * without specific prior written permission.␊ |
| 47 | *␊ |
| 48 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND␊ |
| 49 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE␊ |
| 50 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE␊ |
| 51 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE␊ |
| 52 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL␊ |
| 53 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS␊ |
| 54 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)␊ |
| 55 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT␊ |
| 56 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY␊ |
| 57 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF␊ |
| 58 | * SUCH DAMAGE.␊ |
| 59 | *␊ |
| 60 | *␉@(#)tcp_var.h␉8.4 (Berkeley) 5/24/95␊ |
| 61 | * $FreeBSD: src/sys/netinet/tcp_var.h,v 1.56.2.8 2001/08/22 00:59:13 silby Exp $␊ |
| 62 | */␊ |
| 63 | ␊ |
| 64 | #ifndef _NETINET_TCP_VAR_H_␊ |
| 65 | #define _NETINET_TCP_VAR_H_␊ |
| 66 | #include <sys/appleapiopts.h>␊ |
| 67 | #include <sys/queue.h>␊ |
| 68 | #include <netinet/in_pcb.h>␊ |
| 69 | #include <netinet/tcp_timer.h>␊ |
| 70 | ␊ |
| 71 | #if defined(__LP64__)␊ |
| 72 | #define _TCPCB_PTR(x)␉␉␉u_int32_t␊ |
| 73 | #define _TCPCB_LIST_HEAD(name, type)␉\␊ |
| 74 | struct name {␉␉␉␉\␊ |
| 75 | ␉u_int32_t␉lh_first;␉\␊ |
| 76 | };␊ |
| 77 | #else␊ |
| 78 | #define _TCPCB_PTR(x)␉␉␉x␊ |
| 79 | #define _TCPCB_LIST_HEAD(name, type)␉LIST_HEAD(name, type)␊ |
| 80 | #endif␊ |
| 81 | ␊ |
| 82 | #define TCP_RETRANSHZ␉ 10␉␉/* tcp retrans timer (100ms) per hz */␉␉␊ |
| 83 | ␊ |
| 84 | struct tseg_qent;␊ |
| 85 | _TCPCB_LIST_HEAD(tsegqe_head, tseg_qent);␊ |
| 86 | ␊ |
| 87 | struct tcpcb {␊ |
| 88 | ␉struct␉tsegqe_head t_segq;␊ |
| 89 | ␉int␉t_dupacks;␉␉/* consecutive dup acks recd */␊ |
| 90 | ␉u_int32_t unused;␉␉/* unused now: was t_template */␊ |
| 91 | ␊ |
| 92 | ␉int␉t_timer[TCPT_NTIMERS];␉/* tcp timers */␊ |
| 93 | ␊ |
| 94 | ␉_TCPCB_PTR(struct inpcb *) t_inpcb;␉/* back pointer to internet pcb */␊ |
| 95 | ␉int␉t_state;␉␉/* state of this connection */␊ |
| 96 | ␉u_int␉t_flags;␊ |
| 97 | #define␉TF_ACKNOW␉0x00001␉␉/* ack peer immediately */␊ |
| 98 | #define␉TF_DELACK␉0x00002␉␉/* ack, but try to delay it */␊ |
| 99 | #define␉TF_NODELAY␉0x00004␉␉/* don't delay packets to coalesce */␊ |
| 100 | #define␉TF_NOOPT␉0x00008␉␉/* don't use tcp options */␊ |
| 101 | #define␉TF_SENTFIN␉0x00010␉␉/* have sent FIN */␊ |
| 102 | #define␉TF_REQ_SCALE␉0x00020␉␉/* have/will request window scaling */␊ |
| 103 | #define␉TF_RCVD_SCALE␉0x00040␉␉/* other side has requested scaling */␊ |
| 104 | #define␉TF_REQ_TSTMP␉0x00080␉␉/* have/will request timestamps */␊ |
| 105 | #define␉TF_RCVD_TSTMP␉0x00100␉␉/* a timestamp was received in SYN */␊ |
| 106 | #define␉TF_SACK_PERMIT␉0x00200␉␉/* other side said I could SACK */␊ |
| 107 | #define␉TF_NEEDSYN␉0x00400␉␉/* send SYN (implicit state) */␊ |
| 108 | #define␉TF_NEEDFIN␉0x00800␉␉/* send FIN (implicit state) */␊ |
| 109 | #define␉TF_NOPUSH␉0x01000␉␉/* don't push */␊ |
| 110 | #define␉TF_REQ_CC␉0x02000␉␉/* have/will request CC */␊ |
| 111 | #define␉TF_RCVD_CC␉0x04000␉␉/* a CC was received in SYN */␊ |
| 112 | #define␉TF_SENDCCNEW␉0x08000␉␉/* send CCnew instead of CC in SYN */␊ |
| 113 | #define␉TF_MORETOCOME␉0x10000␉␉/* More data to be appended to sock */␊ |
| 114 | #define␉TF_LQ_OVERFLOW␉0x20000␉␉/* listen queue overflow */␊ |
| 115 | #define␉TF_RXWIN0SENT␉0x40000␉␉/* sent a receiver win 0 in response */␊ |
| 116 | #define␉TF_SLOWLINK␉0x80000␉␉/* route is a on a modem speed link */␊ |
| 117 | ␊ |
| 118 | ␉int␉t_force;␉␉/* 1 if forcing out a byte */␊ |
| 119 | ␊ |
| 120 | ␉tcp_seq␉snd_una;␉␉/* send unacknowledged */␊ |
| 121 | ␉tcp_seq␉snd_max;␉␉/* highest sequence number sent;␊ |
| 122 | ␉␉␉␉␉ * used to recognize retransmits␊ |
| 123 | ␉␉␉␉␉ */␊ |
| 124 | ␉tcp_seq␉snd_nxt;␉␉/* send next */␊ |
| 125 | ␉tcp_seq␉snd_up;␉␉␉/* send urgent pointer */␊ |
| 126 | ␊ |
| 127 | ␉tcp_seq␉snd_wl1;␉␉/* window update seg seq number */␊ |
| 128 | ␉tcp_seq␉snd_wl2;␉␉/* window update seg ack number */␊ |
| 129 | ␉tcp_seq␉iss;␉␉␉/* initial send sequence number */␊ |
| 130 | ␉tcp_seq␉irs;␉␉␉/* initial receive sequence number */␊ |
| 131 | ␊ |
| 132 | ␉tcp_seq␉rcv_nxt;␉␉/* receive next */␊ |
| 133 | ␉tcp_seq␉rcv_adv;␉␉/* advertised window */␊ |
| 134 | ␉u_int32_t rcv_wnd;␉␉/* receive window */␊ |
| 135 | ␉tcp_seq␉rcv_up;␉␉␉/* receive urgent pointer */␊ |
| 136 | ␊ |
| 137 | ␉u_int32_t snd_wnd;␉␉/* send window */␊ |
| 138 | ␉u_int32_t snd_cwnd;␉␉/* congestion-controlled window */␊ |
| 139 | ␉u_int32_t snd_ssthresh;␉␉/* snd_cwnd size threshold for␊ |
| 140 | ␉␉␉␉␉ * for slow start exponential to␊ |
| 141 | ␉␉␉␉␉ * linear switch␊ |
| 142 | ␉␉␉␉␉ */␊ |
| 143 | ␉u_int␉t_maxopd;␉␉/* mss plus options */␊ |
| 144 | ␊ |
| 145 | ␉u_int32_t t_rcvtime;␉␉/* inactivity time */␊ |
| 146 | ␉u_int32_t t_starttime;␉␉/* time connection was established */␊ |
| 147 | ␉int␉t_rtttime;␉␉/* round trip time */␊ |
| 148 | ␉tcp_seq␉t_rtseq;␉␉/* sequence number being timed */␊ |
| 149 | ␊ |
| 150 | ␉int␉t_rxtcur;␉␉/* current retransmit value (ticks) */␊ |
| 151 | ␉u_int␉t_maxseg;␉␉/* maximum segment size */␊ |
| 152 | ␉int␉t_srtt;␉␉␉/* smoothed round-trip time */␊ |
| 153 | ␉int␉t_rttvar;␉␉/* variance in round-trip time */␊ |
| 154 | ␊ |
| 155 | ␉int␉t_rxtshift;␉␉/* log(2) of rexmt exp. backoff */␊ |
| 156 | ␉u_int␉t_rttmin;␉␉/* minimum rtt allowed */␊ |
| 157 | ␉u_int32_t t_rttupdated;␉␉/* number of times rtt sampled */␊ |
| 158 | ␉u_int32_t max_sndwnd;␉␉/* largest window peer has offered */␊ |
| 159 | ␊ |
| 160 | ␉int␉t_softerror;␉␉/* possible error not yet reported */␊ |
| 161 | /* out-of-band data */␊ |
| 162 | ␉char␉t_oobflags;␉␉/* have some */␊ |
| 163 | ␉char␉t_iobc;␉␉␉/* input character */␊ |
| 164 | #define␉TCPOOB_HAVEDATA␉0x01␊ |
| 165 | #define␉TCPOOB_HADDATA␉0x02␊ |
| 166 | /* RFC 1323 variables */␊ |
| 167 | ␉u_char␉snd_scale;␉␉/* window scaling for send window */␊ |
| 168 | ␉u_char␉rcv_scale;␉␉/* window scaling for recv window */␊ |
| 169 | ␉u_char␉request_r_scale;␉/* pending window scaling */␊ |
| 170 | ␉u_char␉requested_s_scale;␊ |
| 171 | ␉u_int32_t ts_recent;␉␉/* timestamp echo data */␊ |
| 172 | ␊ |
| 173 | ␉u_int32_t ts_recent_age;␉/* when last updated */␊ |
| 174 | ␉tcp_seq␉last_ack_sent;␊ |
| 175 | /* RFC 1644 variables */␊ |
| 176 | ␉tcp_cc␉cc_send;␉␉/* send connection count */␊ |
| 177 | ␉tcp_cc␉cc_recv;␉␉/* receive connection count */␊ |
| 178 | ␉tcp_seq␉snd_recover;␉␉/* for use in fast recovery */␊ |
| 179 | /* experimental */␊ |
| 180 | ␉u_int32_t snd_cwnd_prev;␉/* cwnd prior to retransmit */␊ |
| 181 | ␉u_int32_t snd_ssthresh_prev;␉/* ssthresh prior to retransmit */␊ |
| 182 | ␉u_int32_t t_badrxtwin;␉␉/* window for retransmit recovery */␊ |
| 183 | };␊ |
| 184 | ␊ |
| 185 | ␊ |
| 186 | /*␊ |
| 187 | * TCP statistics.␊ |
| 188 | * Many of these should be kept per connection,␊ |
| 189 | * but that's inconvenient at the moment.␊ |
| 190 | */␊ |
| 191 | struct␉tcpstat {␊ |
| 192 | ␉u_int32_t␉tcps_connattempt;␉/* connections initiated */␊ |
| 193 | ␉u_int32_t␉tcps_accepts;␉␉/* connections accepted */␊ |
| 194 | ␉u_int32_t␉tcps_connects;␉␉/* connections established */␊ |
| 195 | ␉u_int32_t␉tcps_drops;␉␉/* connections dropped */␊ |
| 196 | ␉u_int32_t␉tcps_conndrops;␉␉/* embryonic connections dropped */␊ |
| 197 | ␉u_int32_t␉tcps_closed;␉␉/* conn. closed (includes drops) */␊ |
| 198 | ␉u_int32_t␉tcps_segstimed;␉␉/* segs where we tried to get rtt */␊ |
| 199 | ␉u_int32_t␉tcps_rttupdated;␉/* times we succeeded */␊ |
| 200 | ␉u_int32_t␉tcps_delack;␉␉/* delayed acks sent */␊ |
| 201 | ␉u_int32_t␉tcps_timeoutdrop;␉/* conn. dropped in rxmt timeout */␊ |
| 202 | ␉u_int32_t␉tcps_rexmttimeo;␉/* retransmit timeouts */␊ |
| 203 | ␉u_int32_t␉tcps_persisttimeo;␉/* persist timeouts */␊ |
| 204 | ␉u_int32_t␉tcps_keeptimeo;␉␉/* keepalive timeouts */␊ |
| 205 | ␉u_int32_t␉tcps_keepprobe;␉␉/* keepalive probes sent */␊ |
| 206 | ␉u_int32_t␉tcps_keepdrops;␉␉/* connections dropped in keepalive */␊ |
| 207 | ␊ |
| 208 | ␉u_int32_t␉tcps_sndtotal;␉␉/* total packets sent */␊ |
| 209 | ␉u_int32_t␉tcps_sndpack;␉␉/* data packets sent */␊ |
| 210 | ␉u_int32_t␉tcps_sndbyte;␉␉/* data bytes sent */␊ |
| 211 | ␉u_int32_t␉tcps_sndrexmitpack;␉/* data packets retransmitted */␊ |
| 212 | ␉u_int32_t␉tcps_sndrexmitbyte;␉/* data bytes retransmitted */␊ |
| 213 | ␉u_int32_t␉tcps_sndacks;␉␉/* ack-only packets sent */␊ |
| 214 | ␉u_int32_t␉tcps_sndprobe;␉␉/* window probes sent */␊ |
| 215 | ␉u_int32_t␉tcps_sndurg;␉␉/* packets sent with URG only */␊ |
| 216 | ␉u_int32_t␉tcps_sndwinup;␉␉/* window update-only packets sent */␊ |
| 217 | ␉u_int32_t␉tcps_sndctrl;␉␉/* control (SYN|FIN|RST) packets sent */␊ |
| 218 | ␊ |
| 219 | ␉u_int32_t␉tcps_rcvtotal;␉␉/* total packets received */␊ |
| 220 | ␉u_int32_t␉tcps_rcvpack;␉␉/* packets received in sequence */␊ |
| 221 | ␉u_int32_t␉tcps_rcvbyte;␉␉/* bytes received in sequence */␊ |
| 222 | ␉u_int32_t␉tcps_rcvbadsum;␉␉/* packets received with ccksum errs */␊ |
| 223 | ␉u_int32_t␉tcps_rcvbadoff;␉␉/* packets received with bad offset */␊ |
| 224 | ␉u_int32_t␉tcps_rcvmemdrop;␉/* packets dropped for lack of memory */␊ |
| 225 | ␉u_int32_t␉tcps_rcvshort;␉␉/* packets received too short */␊ |
| 226 | ␉u_int32_t␉tcps_rcvduppack;␉/* duplicate-only packets received */␊ |
| 227 | ␉u_int32_t␉tcps_rcvdupbyte;␉/* duplicate-only bytes received */␊ |
| 228 | ␉u_int32_t␉tcps_rcvpartduppack;␉/* packets with some duplicate data */␊ |
| 229 | ␉u_int32_t␉tcps_rcvpartdupbyte;␉/* dup. bytes in part-dup. packets */␊ |
| 230 | ␉u_int32_t␉tcps_rcvoopack;␉␉/* out-of-order packets received */␊ |
| 231 | ␉u_int32_t␉tcps_rcvoobyte;␉␉/* out-of-order bytes received */␊ |
| 232 | ␉u_int32_t␉tcps_rcvpackafterwin;␉/* packets with data after window */␊ |
| 233 | ␉u_int32_t␉tcps_rcvbyteafterwin;␉/* bytes rcvd after window */␊ |
| 234 | ␉u_int32_t␉tcps_rcvafterclose;␉/* packets rcvd after "close" */␊ |
| 235 | ␉u_int32_t␉tcps_rcvwinprobe;␉/* rcvd window probe packets */␊ |
| 236 | ␉u_int32_t␉tcps_rcvdupack;␉␉/* rcvd duplicate acks */␊ |
| 237 | ␉u_int32_t␉tcps_rcvacktoomuch;␉/* rcvd acks for unsent data */␊ |
| 238 | ␉u_int32_t␉tcps_rcvackpack;␉/* rcvd ack packets */␊ |
| 239 | ␉u_int32_t␉tcps_rcvackbyte;␉/* bytes acked by rcvd acks */␊ |
| 240 | ␉u_int32_t␉tcps_rcvwinupd;␉␉/* rcvd window update packets */␊ |
| 241 | ␉u_int32_t␉tcps_pawsdrop;␉␉/* segments dropped due to PAWS */␊ |
| 242 | ␉u_int32_t␉tcps_predack;␉␉/* times hdr predict ok for acks */␊ |
| 243 | ␉u_int32_t␉tcps_preddat;␉␉/* times hdr predict ok for data pkts */␊ |
| 244 | ␉u_int32_t␉tcps_pcbcachemiss;␊ |
| 245 | ␉u_int32_t␉tcps_cachedrtt;␉␉/* times cached RTT in route updated */␊ |
| 246 | ␉u_int32_t␉tcps_cachedrttvar;␉/* times cached rttvar updated */␊ |
| 247 | ␉u_int32_t␉tcps_cachedssthresh;␉/* times cached ssthresh updated */␊ |
| 248 | ␉u_int32_t␉tcps_usedrtt;␉␉/* times RTT initialized from route */␊ |
| 249 | ␉u_int32_t␉tcps_usedrttvar;␉/* times RTTVAR initialized from rt */␊ |
| 250 | ␉u_int32_t␉tcps_usedssthresh;␉/* times ssthresh initialized from rt*/␊ |
| 251 | ␉u_int32_t␉tcps_persistdrop;␉/* timeout in persist state */␊ |
| 252 | ␉u_int32_t␉tcps_badsyn;␉␉/* bogus SYN, e.g. premature ACK */␊ |
| 253 | ␉u_int32_t␉tcps_mturesent;␉␉/* resends due to MTU discovery */␊ |
| 254 | ␉u_int32_t␉tcps_listendrop;␉/* listen queue overflows */␊ |
| 255 | ␊ |
| 256 | ␉/* new stats from FreeBSD 5.4 sync up */␊ |
| 257 | ␉u_int32_t␉tcps_minmssdrops;␉/* average minmss too low drops */␊ |
| 258 | ␉u_int32_t␉tcps_sndrexmitbad;␉/* unnecessary packet retransmissions */␊ |
| 259 | ␉u_int32_t␉tcps_badrst;␉␉/* ignored RSTs in the window */␊ |
| 260 | ␊ |
| 261 | ␉u_int32_t␉tcps_sc_added;␉␉/* entry added to syncache */␊ |
| 262 | ␉u_int32_t␉tcps_sc_retransmitted;␉/* syncache entry was retransmitted */␊ |
| 263 | ␉u_int32_t␉tcps_sc_dupsyn;␉␉/* duplicate SYN packet */␊ |
| 264 | ␉u_int32_t␉tcps_sc_dropped;␉/* could not reply to packet */␊ |
| 265 | ␉u_int32_t␉tcps_sc_completed;␉/* successful extraction of entry */␊ |
| 266 | ␉u_int32_t␉tcps_sc_bucketoverflow;␉/* syncache per-bucket limit hit */␊ |
| 267 | ␉u_int32_t␉tcps_sc_cacheoverflow;␉/* syncache cache limit hit */␊ |
| 268 | ␉u_int32_t␉tcps_sc_reset;␉␉/* RST removed entry from syncache */␊ |
| 269 | ␉u_int32_t␉tcps_sc_stale;␉␉/* timed out or listen socket gone */␊ |
| 270 | ␉u_int32_t␉tcps_sc_aborted;␉/* syncache entry aborted */␊ |
| 271 | ␉u_int32_t␉tcps_sc_badack;␉␉/* removed due to bad ACK */␊ |
| 272 | ␉u_int32_t␉tcps_sc_unreach;␉/* ICMP unreachable received */␊ |
| 273 | ␉u_int32_t␉tcps_sc_zonefail;␉/* zalloc() failed */␊ |
| 274 | ␉u_int32_t␉tcps_sc_sendcookie;␉/* SYN cookie sent */␊ |
| 275 | ␉u_int32_t␉tcps_sc_recvcookie;␉/* SYN cookie received */␊ |
| 276 | ␊ |
| 277 | ␉u_int32_t␉tcps_hc_added;␉␉/* entry added to hostcache */␊ |
| 278 | ␉u_int32_t␉tcps_hc_bucketoverflow;␉/* hostcache per bucket limit hit */␊ |
| 279 | ␊ |
| 280 | ␉/* SACK related stats */␊ |
| 281 | ␉u_int32_t␉tcps_sack_recovery_episode; /* SACK recovery episodes */␊ |
| 282 | ␉u_int32_t tcps_sack_rexmits;␉ /* SACK rexmit segments */␊ |
| 283 | ␉u_int32_t tcps_sack_rexmit_bytes;␉ /* SACK rexmit bytes */␊ |
| 284 | ␉u_int32_t tcps_sack_rcv_blocks;␉ /* SACK blocks (options) received */␊ |
| 285 | ␉u_int32_t tcps_sack_send_blocks;␉ /* SACK blocks (options) sent */␊ |
| 286 | ␉u_int32_t tcps_sack_sboverflow;␉ /* SACK sendblock overflow */␊ |
| 287 | ␊ |
| 288 | #if TRAFFIC_MGT␊ |
| 289 | ␉u_int32_t␉tcps_bg_rcvtotal;␉/* total background packets received */␊ |
| 290 | #endif /* TRAFFIC_MGT */␊ |
| 291 | };␊ |
| 292 | ␊ |
| 293 | #pragma pack(4)␊ |
| 294 | ␊ |
| 295 | /*␊ |
| 296 | * TCB structure exported to user-land via sysctl(3).␊ |
| 297 | * Evil hack: declare only if in_pcb.h and sys/socketvar.h have been␊ |
| 298 | * included. Not all of our clients do.␊ |
| 299 | */␊ |
| 300 | ␊ |
| 301 | struct xtcpcb {␊ |
| 302 | u_int32_t xt_len;␊ |
| 303 | struct inpcb xt_inp;␊ |
| 304 | struct tcpcb xt_tp;␊ |
| 305 | struct xsocket xt_socket;␊ |
| 306 | u_quad_t xt_alignment_hack;␊ |
| 307 | };␊ |
| 308 | ␊ |
| 309 | #if !CONFIG_EMBEDDED␊ |
| 310 | ␊ |
| 311 | struct xtcpcb64 {␊ |
| 312 | u_int32_t ␉␉xt_len;␊ |
| 313 | struct xinpcb64␉␉xt_inpcb;␊ |
| 314 | ␊ |
| 315 | u_int64_t t_segq;␊ |
| 316 | int t_dupacks; /* consecutive dup acks recd */␊ |
| 317 | ␊ |
| 318 | int t_timer[TCPT_NTIMERS]; /* tcp timers */␊ |
| 319 | ␊ |
| 320 | int t_state; /* state of this connection */␊ |
| 321 | u_int t_flags;␊ |
| 322 | ␊ |
| 323 | int t_force; /* 1 if forcing out a byte */␊ |
| 324 | ␊ |
| 325 | tcp_seq snd_una; /* send unacknowledged */␊ |
| 326 | tcp_seq snd_max; /* highest sequence number sent;␊ |
| 327 | * used to recognize retransmits␊ |
| 328 | */␊ |
| 329 | tcp_seq snd_nxt; /* send next */␊ |
| 330 | tcp_seq snd_up; /* send urgent pointer */␊ |
| 331 | ␊ |
| 332 | tcp_seq snd_wl1; /* window update seg seq number */␊ |
| 333 | tcp_seq snd_wl2; /* window update seg ack number */␊ |
| 334 | tcp_seq iss; /* initial send sequence number */␊ |
| 335 | tcp_seq irs; /* initial receive sequence number */␊ |
| 336 | ␊ |
| 337 | tcp_seq rcv_nxt; /* receive next */␊ |
| 338 | tcp_seq rcv_adv; /* advertised window */␊ |
| 339 | u_int32_t rcv_wnd; /* receive window */␊ |
| 340 | tcp_seq rcv_up; /* receive urgent pointer */␊ |
| 341 | ␊ |
| 342 | u_int32_t snd_wnd; /* send window */␊ |
| 343 | u_int32_t snd_cwnd; /* congestion-controlled window */␊ |
| 344 | u_int32_t snd_ssthresh; /* snd_cwnd size threshold for␊ |
| 345 | * for slow start exponential to␊ |
| 346 | * linear switch␊ |
| 347 | */␊ |
| 348 | u_int t_maxopd; /* mss plus options */␊ |
| 349 | ␊ |
| 350 | u_int32_t t_rcvtime; /* inactivity time */␊ |
| 351 | u_int32_t t_starttime; /* time connection was established */␊ |
| 352 | int t_rtttime; /* round trip time */␊ |
| 353 | tcp_seq t_rtseq; /* sequence number being timed */␊ |
| 354 | ␊ |
| 355 | int t_rxtcur; /* current retransmit value (ticks) */␊ |
| 356 | u_int t_maxseg; /* maximum segment size */␊ |
| 357 | int t_srtt; /* smoothed round-trip time */␊ |
| 358 | int t_rttvar; /* variance in round-trip time */␊ |
| 359 | ␊ |
| 360 | int t_rxtshift; /* log(2) of rexmt exp. backoff */␊ |
| 361 | u_int t_rttmin; /* minimum rtt allowed */␊ |
| 362 | u_int32_t t_rttupdated; /* number of times rtt sampled */␊ |
| 363 | u_int32_t max_sndwnd; /* largest window peer has offered */␊ |
| 364 | ␊ |
| 365 | int t_softerror; /* possible error not yet reported */␊ |
| 366 | /* out-of-band data */␊ |
| 367 | char t_oobflags; /* have some */␊ |
| 368 | char t_iobc; /* input character */␊ |
| 369 | /* RFC 1323 variables */␊ |
| 370 | u_char snd_scale; /* window scaling for send window */␊ |
| 371 | u_char rcv_scale; /* window scaling for recv window */␊ |
| 372 | u_char request_r_scale; /* pending window scaling */␊ |
| 373 | u_char requested_s_scale;␊ |
| 374 | u_int32_t ts_recent; /* timestamp echo data */␊ |
| 375 | ␊ |
| 376 | u_int32_t ts_recent_age; /* when last updated */␊ |
| 377 | tcp_seq last_ack_sent;␊ |
| 378 | /* RFC 1644 variables */␊ |
| 379 | tcp_cc cc_send; /* send connection count */␊ |
| 380 | tcp_cc cc_recv; /* receive connection count */␊ |
| 381 | tcp_seq snd_recover; /* for use in fast recovery */␊ |
| 382 | /* experimental */␊ |
| 383 | u_int32_t snd_cwnd_prev; /* cwnd prior to retransmit */␊ |
| 384 | u_int32_t snd_ssthresh_prev; /* ssthresh prior to retransmit */␊ |
| 385 | u_int32_t t_badrxtwin; /* window for retransmit recovery */␊ |
| 386 | ␊ |
| 387 | u_quad_t␉␉xt_alignment_hack;␊ |
| 388 | };␊ |
| 389 | ␊ |
| 390 | #endif /* !CONFIG_EMBEDDED */␊ |
| 391 | ␊ |
| 392 | #pragma pack()␊ |
| 393 | ␊ |
| 394 | /*␊ |
| 395 | * Names for TCP sysctl objects␊ |
| 396 | */␊ |
| 397 | #define␉TCPCTL_DO_RFC1323␉1␉/* use RFC-1323 extensions */␊ |
| 398 | #define␉TCPCTL_DO_RFC1644␉2␉/* use RFC-1644 extensions */␊ |
| 399 | #define␉TCPCTL_MSSDFLT␉␉3␉/* MSS default */␊ |
| 400 | #define TCPCTL_STATS␉␉4␉/* statistics (read-only) */␊ |
| 401 | #define␉TCPCTL_RTTDFLT␉␉5␉/* default RTT estimate */␊ |
| 402 | #define␉TCPCTL_KEEPIDLE␉␉6␉/* keepalive idle timer */␊ |
| 403 | #define␉TCPCTL_KEEPINTVL␉7␉/* interval to send keepalives */␊ |
| 404 | #define␉TCPCTL_SENDSPACE␉8␉/* send buffer space */␊ |
| 405 | #define␉TCPCTL_RECVSPACE␉9␉/* receive buffer space */␊ |
| 406 | #define␉TCPCTL_KEEPINIT␉␉10␉/* timeout for establishing syn */␊ |
| 407 | #define␉TCPCTL_PCBLIST␉␉11␉/* list of all outstanding PCBs */␊ |
| 408 | #define␉TCPCTL_DELACKTIME␉12␉/* time before sending delayed ACK */␊ |
| 409 | #define␉TCPCTL_V6MSSDFLT␉13␉/* MSS default for IPv6 */␊ |
| 410 | #define␉TCPCTL_MAXID␉␉14␊ |
| 411 | ␊ |
| 412 | ␊ |
| 413 | #endif /* _NETINET_TCP_VAR_H_ */␊ |
| 414 | |
