1139823Simp/*- 21541Srgrimes * Copyright (c) 1982, 1986, 1993 3169465Srwatson * The Regents of the University of California. 4169465Srwatson * All rights reserved. 51541Srgrimes * 61541Srgrimes * Redistribution and use in source and binary forms, with or without 71541Srgrimes * modification, are permitted provided that the following conditions 81541Srgrimes * are met: 91541Srgrimes * 1. Redistributions of source code must retain the above copyright 101541Srgrimes * notice, this list of conditions and the following disclaimer. 111541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 121541Srgrimes * notice, this list of conditions and the following disclaimer in the 131541Srgrimes * documentation and/or other materials provided with the distribution. 141541Srgrimes * 4. Neither the name of the University nor the names of its contributors 151541Srgrimes * may be used to endorse or promote products derived from this software 161541Srgrimes * without specific prior written permission. 171541Srgrimes * 181541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 191541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 201541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 211541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 221541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 231541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 241541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 251541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 261541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 271541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 281541Srgrimes * SUCH DAMAGE. 291541Srgrimes * 301541Srgrimes * @(#)tcp_fsm.h 8.1 (Berkeley) 6/10/93 3150477Speter * $FreeBSD$ 321541Srgrimes */ 331541Srgrimes 342169Spaul#ifndef _NETINET_TCP_FSM_H_ 35169465Srwatson#define _NETINET_TCP_FSM_H_ 362169Spaul 371541Srgrimes/* 381541Srgrimes * TCP FSM state definitions. 39169465Srwatson * 401541Srgrimes * Per RFC793, September, 1981. 411541Srgrimes */ 421541Srgrimes 431541Srgrimes#define TCP_NSTATES 11 441541Srgrimes 451541Srgrimes#define TCPS_CLOSED 0 /* closed */ 461541Srgrimes#define TCPS_LISTEN 1 /* listening for connection */ 471541Srgrimes#define TCPS_SYN_SENT 2 /* active, have sent syn */ 48137971Srwatson#define TCPS_SYN_RECEIVED 3 /* have sent and received syn */ 491541Srgrimes/* states < TCPS_ESTABLISHED are those where connections not established */ 501541Srgrimes#define TCPS_ESTABLISHED 4 /* established */ 511541Srgrimes#define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */ 521541Srgrimes/* states > TCPS_CLOSE_WAIT are those where user has closed */ 531541Srgrimes#define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */ 541541Srgrimes#define TCPS_CLOSING 7 /* closed xchd FIN; await FIN ACK */ 551541Srgrimes#define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */ 561541Srgrimes/* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */ 571541Srgrimes#define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */ 581541Srgrimes#define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */ 591541Srgrimes 6052904Sshin/* for KAME src sync over BSD*'s */ 6152904Sshin#define TCP6_NSTATES TCP_NSTATES 6252904Sshin#define TCP6S_CLOSED TCPS_CLOSED 6352904Sshin#define TCP6S_LISTEN TCPS_LISTEN 6452904Sshin#define TCP6S_SYN_SENT TCPS_SYN_SENT 6552904Sshin#define TCP6S_SYN_RECEIVED TCPS_SYN_RECEIVED 6652904Sshin#define TCP6S_ESTABLISHED TCPS_ESTABLISHED 6752904Sshin#define TCP6S_CLOSE_WAIT TCPS_CLOSE_WAIT 6852904Sshin#define TCP6S_FIN_WAIT_1 TCPS_FIN_WAIT_1 6952904Sshin#define TCP6S_CLOSING TCPS_CLOSING 7052904Sshin#define TCP6S_LAST_ACK TCPS_LAST_ACK 7152904Sshin#define TCP6S_FIN_WAIT_2 TCPS_FIN_WAIT_2 7252904Sshin#define TCP6S_TIME_WAIT TCPS_TIME_WAIT 7352904Sshin 741541Srgrimes#define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED) 7552904Sshin#define TCPS_HAVEESTABLISHED(s) ((s) >= TCPS_ESTABLISHED) 761541Srgrimes#define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT) 771541Srgrimes 781541Srgrimes#ifdef TCPOUTFLAGS 791541Srgrimes/* 80169465Srwatson * Flags used when sending segments in tcp_output. Basic flags (TH_RST, 81169465Srwatson * TH_ACK,TH_SYN,TH_FIN) are totally determined by state, with the proviso 82169465Srwatson * that TH_FIN is sent only if all data queued for output is included in the 83169465Srwatson * segment. 841541Srgrimes */ 8512296Sphkstatic u_char tcp_outflags[TCP_NSTATES] = { 8645439Sjulian TH_RST|TH_ACK, /* 0, CLOSED */ 8745439Sjulian 0, /* 1, LISTEN */ 8845439Sjulian TH_SYN, /* 2, SYN_SENT */ 8945439Sjulian TH_SYN|TH_ACK, /* 3, SYN_RECEIVED */ 9045439Sjulian TH_ACK, /* 4, ESTABLISHED */ 9145439Sjulian TH_ACK, /* 5, CLOSE_WAIT */ 9245439Sjulian TH_FIN|TH_ACK, /* 6, FIN_WAIT_1 */ 9352952Sjlemon TH_FIN|TH_ACK, /* 7, CLOSING */ 9445439Sjulian TH_FIN|TH_ACK, /* 8, LAST_ACK */ 9545439Sjulian TH_ACK, /* 9, FIN_WAIT_2 */ 9645439Sjulian TH_ACK, /* 10, TIME_WAIT */ 9745439Sjulian}; 981541Srgrimes#endif 991541Srgrimes 1001541Srgrimes#ifdef KPROF 1011541Srgrimesint tcp_acounts[TCP_NSTATES][PRU_NREQ]; 1021541Srgrimes#endif 1031541Srgrimes 1041541Srgrimes#ifdef TCPSTATES 105171656Sdesstatic char const * const tcpstates[] = { 1061541Srgrimes "CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD", 1071541Srgrimes "ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING", 1081541Srgrimes "LAST_ACK", "FIN_WAIT_2", "TIME_WAIT", 1091541Srgrimes}; 1101541Srgrimes#endif 1112169Spaul 1122169Spaul#endif 113