18b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/* 28b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * Copyright (c) 1982, 1986, 1993, 1994 38b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * The Regents of the University of California. All rights reserved. 48b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * 58b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * Redistribution and use in source and binary forms, with or without 68b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * modification, are permitted provided that the following conditions 78b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * are met: 88b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * 1. Redistributions of source code must retain the above copyright 98b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * notice, this list of conditions and the following disclaimer. 108b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 118b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * notice, this list of conditions and the following disclaimer in the 128b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * documentation and/or other materials provided with the distribution. 138b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * 3. All advertising materials mentioning features or use of this software 148b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * must display the following acknowledgement: 158b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * This product includes software developed by the University of 168b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * California, Berkeley and its contributors. 178b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * 4. Neither the name of the University nor the names of its contributors 188b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * may be used to endorse or promote products derived from this software 198b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * without specific prior written permission. 208b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * 218b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 228b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 238b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 248b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 258b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 268b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 278b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 288b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 298b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 308b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 318b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * SUCH DAMAGE. 328b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * 338b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * @(#)tcp_var.h 8.3 (Berkeley) 4/10/94 348b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * tcp_var.h,v 1.3 1994/08/21 05:27:39 paul Exp 358b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project */ 368b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 378b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#ifndef _TCP_VAR_H_ 388b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#define _TCP_VAR_H_ 398b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 408b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#include "mbuf.h" 418b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#include "tcpip.h" 428b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#include "tcp_timer.h" 438b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 448b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/* 458b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * Tcp control block, one per tcp; fields: 468b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project */ 478b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Projectstruct tcpcb { 488b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project struct tcpiphdr *seg_next; /* sequencing queue */ 498b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project struct tcpiphdr *seg_prev; 508b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project short t_state; /* state of this connection */ 518b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project short t_timer[TCPT_NTIMERS]; /* tcp timers */ 528b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project short t_rxtshift; /* log(2) of rexmt exp. backoff */ 538b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project short t_rxtcur; /* current retransmit value */ 548b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project short t_dupacks; /* consecutive dup acks recd */ 558b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_short t_maxseg; /* maximum segment size */ 568b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project char t_force; /* 1 if forcing out a byte */ 578b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_short t_flags; 588b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#define TF_ACKNOW 0x0001 /* ack peer immediately */ 598b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#define TF_DELACK 0x0002 /* ack, but try to delay it */ 608b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#define TF_NODELAY 0x0004 /* don't delay packets to coalesce */ 618b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#define TF_NOOPT 0x0008 /* don't use tcp options */ 628b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#define TF_SENTFIN 0x0010 /* have sent FIN */ 638b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#define TF_REQ_SCALE 0x0020 /* have/will request window scaling */ 648b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#define TF_RCVD_SCALE 0x0040 /* other side has requested scaling */ 658b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#define TF_REQ_TSTMP 0x0080 /* have/will request timestamps */ 668b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#define TF_RCVD_TSTMP 0x0100 /* a timestamp was received in SYN */ 678b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#define TF_SACK_PERMIT 0x0200 /* other side said I could SACK */ 688b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 698b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project /* Make it static for now */ 708b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/* struct tcpiphdr *t_template; / * skeletal packet for transmit */ 718b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project struct tcpiphdr t_template; 728b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 738b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project struct socket *t_socket; /* back pointer to socket */ 748b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/* 758b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * The following fields are used as in the protocol specification. 768b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * See RFC783, Dec. 1981, page 21. 778b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project */ 788b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/* send sequence variables */ 798b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project tcp_seq snd_una; /* send unacknowledged */ 808b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project tcp_seq snd_nxt; /* send next */ 818b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project tcp_seq snd_up; /* send urgent pointer */ 828b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project tcp_seq snd_wl1; /* window update seg seq number */ 838b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project tcp_seq snd_wl2; /* window update seg ack number */ 848b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project tcp_seq iss; /* initial send sequence number */ 858b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_int32_t snd_wnd; /* send window */ 868b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/* receive sequence variables */ 878b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_int32_t rcv_wnd; /* receive window */ 888b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project tcp_seq rcv_nxt; /* receive next */ 898b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project tcp_seq rcv_up; /* receive urgent pointer */ 908b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project tcp_seq irs; /* initial receive sequence number */ 918b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/* 928b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * Additional variables for this implementation. 938b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project */ 948b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/* receive variables */ 958b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project tcp_seq rcv_adv; /* advertised window */ 968b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/* retransmit variables */ 978b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project tcp_seq snd_max; /* highest sequence number sent; 988b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * used to recognize retransmits 998b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project */ 1008b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/* congestion control (for slow start, source quench, retransmit after loss) */ 1018b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_int32_t snd_cwnd; /* congestion-controlled window */ 1028b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_int32_t snd_ssthresh; /* snd_cwnd size threshold for 1038b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * for slow start exponential to 1048b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * linear switch 1058b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project */ 1068b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/* 1078b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * transmit timing stuff. See below for scale of srtt and rttvar. 1088b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * "Variance" is actually smoothed difference. 1098b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project */ 1108b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project short t_idle; /* inactivity time */ 1118b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project short t_rtt; /* round trip time */ 1128b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project tcp_seq t_rtseq; /* sequence number being timed */ 1138b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project short t_srtt; /* smoothed round-trip time */ 1148b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project short t_rttvar; /* variance in round-trip time */ 1158b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_short t_rttmin; /* minimum rtt allowed */ 1168b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_int32_t max_sndwnd; /* largest window peer has offered */ 1178b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1188b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/* out-of-band data */ 1198b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project char t_oobflags; /* have some */ 1208b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project char t_iobc; /* input character */ 1218b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#define TCPOOB_HAVEDATA 0x01 1228b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#define TCPOOB_HADDATA 0x02 1238b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project short t_softerror; /* possible error not yet reported */ 1248b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1258b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/* RFC 1323 variables */ 1268b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_char snd_scale; /* window scaling for send window */ 1278b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_char rcv_scale; /* window scaling for recv window */ 1288b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_char request_r_scale; /* pending window scaling */ 1298b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_char requested_s_scale; 1308b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_int32_t ts_recent; /* timestamp echo data */ 1318b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_int32_t ts_recent_age; /* when last updated */ 1328b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project tcp_seq last_ack_sent; 1338b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1348b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project}; 1358b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1368b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#define sototcpcb(so) ((so)->so_tcpcb) 1378b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1388b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/* 1398b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * The smoothed round-trip time and estimated variance 1408b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * are stored as fixed point numbers scaled by the values below. 1418b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * For convenience, these scales are also used in smoothing the average 1428b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * (smoothed = (1/scale)sample + ((scale-1)/scale)smoothed). 1438b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * With these scales, srtt has 3 bits to the right of the binary point, 1448b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * and thus an "ALPHA" of 0.875. rttvar has 2 bits to the right of the 1458b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * binary point, and is smoothed with an ALPHA of 0.75. 1468b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project */ 1478b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#define TCP_RTT_SCALE 8 /* multiplier for srtt; 3 bits frac. */ 1488b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#define TCP_RTT_SHIFT 3 /* shift for srtt; 3 bits frac. */ 1498b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#define TCP_RTTVAR_SCALE 4 /* multiplier for rttvar; 2 bits */ 1508b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#define TCP_RTTVAR_SHIFT 2 /* multiplier for rttvar; 2 bits */ 1518b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1528b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/* 1538b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * The initial retransmission should happen at rtt + 4 * rttvar. 1548b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * Because of the way we do the smoothing, srtt and rttvar 1558b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * will each average +1/2 tick of bias. When we compute 1568b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * the retransmit timer, we want 1/2 tick of rounding and 1578b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * 1 extra tick because of +-1/2 tick uncertainty in the 1588b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * firing of the timer. The bias will give us exactly the 1598b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * 1.5 tick we need. But, because the bias is 1608b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * statistical, we have to test that we don't drop below 1618b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * the minimum feasible timer (which is 2 ticks). 1628b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * This macro assumes that the value of TCP_RTTVAR_SCALE 1638b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * is the same as the multiplier for rttvar. 1648b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project */ 1658b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#define TCP_REXMTVAL(tp) \ 1668b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project (((tp)->t_srtt >> TCP_RTT_SHIFT) + (tp)->t_rttvar) 1678b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1688b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/* 1698b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * TCP statistics. 1708b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * Many of these should be kept per connection, 1718b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project * but that's inconvenient at the moment. 1728b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project */ 1738b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Projectstruct tcpstat { 1748b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_connattempt; /* connections initiated */ 1758b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_accepts; /* connections accepted */ 1768b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_connects; /* connections established */ 1778b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_drops; /* connections dropped */ 1788b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_conndrops; /* embryonic connections dropped */ 1798b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_closed; /* conn. closed (includes drops) */ 1808b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_segstimed; /* segs where we tried to get rtt */ 1818b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_rttupdated; /* times we succeeded */ 1828b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_delack; /* delayed acks sent */ 1838b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_timeoutdrop; /* conn. dropped in rxmt timeout */ 1848b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_rexmttimeo; /* retransmit timeouts */ 1858b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_persisttimeo; /* persist timeouts */ 1868b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_keeptimeo; /* keepalive timeouts */ 1878b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_keepprobe; /* keepalive probes sent */ 1888b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_keepdrops; /* connections dropped in keepalive */ 1898b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1908b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_sndtotal; /* total packets sent */ 1918b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_sndpack; /* data packets sent */ 1928b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_sndbyte; /* data bytes sent */ 1938b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_sndrexmitpack; /* data packets retransmitted */ 1948b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_sndrexmitbyte; /* data bytes retransmitted */ 1958b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_sndacks; /* ack-only packets sent */ 1968b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_sndprobe; /* window probes sent */ 1978b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_sndurg; /* packets sent with URG only */ 1988b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_sndwinup; /* window update-only packets sent */ 1998b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_sndctrl; /* control (SYN|FIN|RST) packets sent */ 2008b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 2018b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_rcvtotal; /* total packets received */ 2028b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_rcvpack; /* packets received in sequence */ 2038b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_rcvbyte; /* bytes received in sequence */ 2048b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_rcvbadsum; /* packets received with ccksum errs */ 2058b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_rcvbadoff; /* packets received with bad offset */ 2068b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/* u_long tcps_rcvshort; */ /* packets received too short */ 2078b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_rcvduppack; /* duplicate-only packets received */ 2088b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_rcvdupbyte; /* duplicate-only bytes received */ 2098b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_rcvpartduppack; /* packets with some duplicate data */ 2108b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_rcvpartdupbyte; /* dup. bytes in part-dup. packets */ 2118b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_rcvoopack; /* out-of-order packets received */ 2128b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_rcvoobyte; /* out-of-order bytes received */ 2138b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_rcvpackafterwin; /* packets with data after window */ 2148b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_rcvbyteafterwin; /* bytes rcvd after window */ 2158b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_rcvafterclose; /* packets rcvd after "close" */ 2168b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_rcvwinprobe; /* rcvd window probe packets */ 2178b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_rcvdupack; /* rcvd duplicate acks */ 2188b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_rcvacktoomuch; /* rcvd acks for unsent data */ 2198b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_rcvackpack; /* rcvd ack packets */ 2208b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_rcvackbyte; /* bytes acked by rcvd acks */ 2218b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_rcvwinupd; /* rcvd window update packets */ 2228b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/* u_long tcps_pawsdrop; */ /* segments dropped due to PAWS */ 2238b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_predack; /* times hdr predict ok for acks */ 2248b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_preddat; /* times hdr predict ok for data pkts */ 2258b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_socachemiss; /* tcp_last_so misses */ 2268b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project u_long tcps_didnuttin; /* Times tcp_output didn't do anything XXX */ 2278b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project}; 2288b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 2298b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Projectextern struct tcpstat tcpstat; /* tcp statistics */ 2308b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Projectextern u_int32_t tcp_now; /* for RFC 1323 timestamps */ 2318b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 2328b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#endif 233