| tcp_var.h (50477) | tcp_var.h (50673) |
|---|---|
| 1/* 2 * Copyright (c) 1982, 1986, 1993, 1994, 1995 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 17 unchanged lines hidden (view full) --- 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)tcp_var.h 8.4 (Berkeley) 5/24/95 | 1/* 2 * Copyright (c) 1982, 1986, 1993, 1994, 1995 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 17 unchanged lines hidden (view full) --- 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)tcp_var.h 8.4 (Berkeley) 5/24/95 |
| 34 * $FreeBSD: head/sys/netinet/tcp_var.h 50477 1999-08-28 01:08:13Z peter $ | 34 * $FreeBSD: head/sys/netinet/tcp_var.h 50673 1999-08-30 21:17:07Z jlemon $ |
| 35 */ 36 37#ifndef _NETINET_TCP_VAR_H_ 38#define _NETINET_TCP_VAR_H_ 39/* 40 * Kernel variables for tcp. 41 */ 42 43/* 44 * Tcp control block, one per tcp; fields: 45 * Organized for 16 byte cacheline efficiency. 46 */ 47struct tcpcb { 48 struct mbuf *t_segq; 49 int t_dupacks; /* consecutive dup acks recd */ 50 struct tcpiphdr *t_template; /* skeletal packet for transmit */ 51 | 35 */ 36 37#ifndef _NETINET_TCP_VAR_H_ 38#define _NETINET_TCP_VAR_H_ 39/* 40 * Kernel variables for tcp. 41 */ 42 43/* 44 * Tcp control block, one per tcp; fields: 45 * Organized for 16 byte cacheline efficiency. 46 */ 47struct tcpcb { 48 struct mbuf *t_segq; 49 int t_dupacks; /* consecutive dup acks recd */ 50 struct tcpiphdr *t_template; /* skeletal packet for transmit */ 51 |
| 52 int t_timer[TCPT_NTIMERS]; /* tcp timers */ | 52 struct callout *tt_rexmt; /* retransmit timer */ 53 struct callout *tt_persist; /* retransmit persistence */ 54 struct callout *tt_keep; /* keepalive */ 55 struct callout *tt_2msl; /* 2*msl TIME_WAIT timer */ 56 struct callout *tt_delack; /* delayed ACK timer */ |
| 53 54 struct inpcb *t_inpcb; /* back pointer to internet pcb */ 55 int t_state; /* state of this connection */ 56 u_int t_flags; 57#define TF_ACKNOW 0x00001 /* ack peer immediately */ 58#define TF_DELACK 0x00002 /* ack, but try to delay it */ 59#define TF_NODELAY 0x00004 /* don't delay packets to coalesce */ 60#define TF_NOOPT 0x00008 /* don't use tcp options */ --- 32 unchanged lines hidden (view full) --- 93 u_long snd_wnd; /* send window */ 94 u_long snd_cwnd; /* congestion-controlled window */ 95 u_long snd_ssthresh; /* snd_cwnd size threshold for 96 * for slow start exponential to 97 * linear switch 98 */ 99 u_int t_maxopd; /* mss plus options */ 100 | 57 58 struct inpcb *t_inpcb; /* back pointer to internet pcb */ 59 int t_state; /* state of this connection */ 60 u_int t_flags; 61#define TF_ACKNOW 0x00001 /* ack peer immediately */ 62#define TF_DELACK 0x00002 /* ack, but try to delay it */ 63#define TF_NODELAY 0x00004 /* don't delay packets to coalesce */ 64#define TF_NOOPT 0x00008 /* don't use tcp options */ --- 32 unchanged lines hidden (view full) --- 97 u_long snd_wnd; /* send window */ 98 u_long snd_cwnd; /* congestion-controlled window */ 99 u_long snd_ssthresh; /* snd_cwnd size threshold for 100 * for slow start exponential to 101 * linear switch 102 */ 103 u_int t_maxopd; /* mss plus options */ 104 |
| 101 u_int t_idle; /* inactivity time */ 102 u_long t_duration; /* connection duration */ 103 int t_rtt; /* round trip time */ | 105 u_long t_rcvtime; /* inactivity time */ 106 u_long t_starttime; /* time connection was established */ 107 int t_rtttime; /* round trip time */ |
| 104 tcp_seq t_rtseq; /* sequence number being timed */ 105 | 108 tcp_seq t_rtseq; /* sequence number being timed */ 109 |
| 106 int t_rxtcur; /* current retransmit value */ | 110 int t_rxtcur; /* current retransmit value (ticks) */ |
| 107 u_int t_maxseg; /* maximum segment size */ 108 int t_srtt; /* smoothed round-trip time */ 109 int t_rttvar; /* variance in round-trip time */ 110 111 int t_rxtshift; /* log(2) of rexmt exp. backoff */ 112 u_int t_rttmin; /* minimum rtt allowed */ 113 u_long t_rttupdated; /* number of times rtt sampled */ 114 u_long max_sndwnd; /* largest window peer has offered */ --- 11 unchanged lines hidden (view full) --- 126 u_char requested_s_scale; 127 u_long ts_recent; /* timestamp echo data */ 128 129 u_long ts_recent_age; /* when last updated */ 130 tcp_seq last_ack_sent; 131/* RFC 1644 variables */ 132 tcp_cc cc_send; /* send connection count */ 133 tcp_cc cc_recv; /* receive connection count */ | 111 u_int t_maxseg; /* maximum segment size */ 112 int t_srtt; /* smoothed round-trip time */ 113 int t_rttvar; /* variance in round-trip time */ 114 115 int t_rxtshift; /* log(2) of rexmt exp. backoff */ 116 u_int t_rttmin; /* minimum rtt allowed */ 117 u_long t_rttupdated; /* number of times rtt sampled */ 118 u_long max_sndwnd; /* largest window peer has offered */ --- 11 unchanged lines hidden (view full) --- 130 u_char requested_s_scale; 131 u_long ts_recent; /* timestamp echo data */ 132 133 u_long ts_recent_age; /* when last updated */ 134 tcp_seq last_ack_sent; 135/* RFC 1644 variables */ 136 tcp_cc cc_send; /* send connection count */ 137 tcp_cc cc_recv; /* receive connection count */ |
| 138/* experimental */ 139 u_long snd_cwnd_prev; /* cwnd prior to retransmit */ 140 u_long snd_ssthresh_prev; /* ssthresh prior to retransmit */ 141 u_long t_badrxtwin; /* window for retransmit recovery */ |
|
| 134}; 135 136/* 137 * Structure to hold TCP options that are only used during segment 138 * processing (in tcp_input), but not held in the tcpcb. 139 * It's basically used to reduce the number of parameters 140 * to tcp_dooptions. 141 */ --- 158 unchanged lines hidden (view full) --- 300#define TCPCTL_STATS 4 /* statistics (read-only) */ 301#define TCPCTL_RTTDFLT 5 /* default RTT estimate */ 302#define TCPCTL_KEEPIDLE 6 /* keepalive idle timer */ 303#define TCPCTL_KEEPINTVL 7 /* interval to send keepalives */ 304#define TCPCTL_SENDSPACE 8 /* send buffer space */ 305#define TCPCTL_RECVSPACE 9 /* receive buffer space */ 306#define TCPCTL_KEEPINIT 10 /* receive buffer space */ 307#define TCPCTL_PCBLIST 11 /* list of all outstanding PCBs */ | 142}; 143 144/* 145 * Structure to hold TCP options that are only used during segment 146 * processing (in tcp_input), but not held in the tcpcb. 147 * It's basically used to reduce the number of parameters 148 * to tcp_dooptions. 149 */ --- 158 unchanged lines hidden (view full) --- 308#define TCPCTL_STATS 4 /* statistics (read-only) */ 309#define TCPCTL_RTTDFLT 5 /* default RTT estimate */ 310#define TCPCTL_KEEPIDLE 6 /* keepalive idle timer */ 311#define TCPCTL_KEEPINTVL 7 /* interval to send keepalives */ 312#define TCPCTL_SENDSPACE 8 /* send buffer space */ 313#define TCPCTL_RECVSPACE 9 /* receive buffer space */ 314#define TCPCTL_KEEPINIT 10 /* receive buffer space */ 315#define TCPCTL_PCBLIST 11 /* list of all outstanding PCBs */ |
| 308#define TCPCTL_MAXID 12 | 316#define TCPCTL_DELACKTIME 12 /* time before sending delayed ACK */ 317#define TCPCTL_MAXID 13 |
| 309 310#define TCPCTL_NAMES { \ 311 { 0, 0 }, \ 312 { "rfc1323", CTLTYPE_INT }, \ 313 { "rfc1644", CTLTYPE_INT }, \ 314 { "mssdflt", CTLTYPE_INT }, \ 315 { "stats", CTLTYPE_STRUCT }, \ 316 { "rttdflt", CTLTYPE_INT }, \ 317 { "keepidle", CTLTYPE_INT }, \ 318 { "keepintvl", CTLTYPE_INT }, \ 319 { "sendspace", CTLTYPE_INT }, \ 320 { "recvspace", CTLTYPE_INT }, \ 321 { "keepinit", CTLTYPE_INT }, \ 322 { "pcblist", CTLTYPE_STRUCT }, \ | 318 319#define TCPCTL_NAMES { \ 320 { 0, 0 }, \ 321 { "rfc1323", CTLTYPE_INT }, \ 322 { "rfc1644", CTLTYPE_INT }, \ 323 { "mssdflt", CTLTYPE_INT }, \ 324 { "stats", CTLTYPE_STRUCT }, \ 325 { "rttdflt", CTLTYPE_INT }, \ 326 { "keepidle", CTLTYPE_INT }, \ 327 { "keepintvl", CTLTYPE_INT }, \ 328 { "sendspace", CTLTYPE_INT }, \ 329 { "recvspace", CTLTYPE_INT }, \ 330 { "keepinit", CTLTYPE_INT }, \ 331 { "pcblist", CTLTYPE_STRUCT }, \ |
| 332 { "delacktime", CTLTYPE_INT }, \ |
|
| 323} 324 325 326#ifdef KERNEL 327#ifdef SYSCTL_DECL 328SYSCTL_DECL(_net_inet_tcp); 329#endif 330 331extern struct inpcbhead tcb; /* head of queue of active tcpcb's */ 332extern struct inpcbinfo tcbinfo; 333extern struct tcpstat tcpstat; /* tcp statistics */ 334extern int tcp_mssdflt; /* XXX */ | 333} 334 335 336#ifdef KERNEL 337#ifdef SYSCTL_DECL 338SYSCTL_DECL(_net_inet_tcp); 339#endif 340 341extern struct inpcbhead tcb; /* head of queue of active tcpcb's */ 342extern struct inpcbinfo tcbinfo; 343extern struct tcpstat tcpstat; /* tcp statistics */ 344extern int tcp_mssdflt; /* XXX */ |
| 335extern u_long tcp_now; /* for RFC 1323 timestamps */ | |
| 336extern int tcp_delack_enabled; | 345extern int tcp_delack_enabled; |
| 346extern int ss_fltsz; 347extern int ss_fltsz_local; |
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| 337 338void tcp_canceltimers __P((struct tcpcb *)); 339struct tcpcb * 340 tcp_close __P((struct tcpcb *)); 341void tcp_ctlinput __P((int, struct sockaddr *, void *)); 342int tcp_ctloutput __P((struct socket *, struct sockopt *)); 343struct tcpcb * 344 tcp_drop __P((struct tcpcb *, int)); --- 32 unchanged lines hidden --- | 348 349void tcp_canceltimers __P((struct tcpcb *)); 350struct tcpcb * 351 tcp_close __P((struct tcpcb *)); 352void tcp_ctlinput __P((int, struct sockaddr *, void *)); 353int tcp_ctloutput __P((struct socket *, struct sockopt *)); 354struct tcpcb * 355 tcp_drop __P((struct tcpcb *, int)); --- 32 unchanged lines hidden --- |