1 /* 2 * Copyright (c) 1982, 1986, 1993 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 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)tcp_fsm.h 8.1 (Berkeley) 6/10/93 30 * $FreeBSD: src/sys/netinet/tcp_fsm.h,v 1.14 1999/11/07 04:18:30 jlemon Exp $ 31 * $DragonFly: src/sys/netinet/tcp_fsm.h,v 1.5 2004/09/22 08:54:27 joerg Exp $ 32 */ 33 34 #ifndef _NETINET_TCP_FSM_H_ 35 #define _NETINET_TCP_FSM_H_ 36 37 /* 38 * TCP FSM state definitions. 39 * Per RFC793, September, 1981. 40 */ 41 42 #define TCP_NSTATES 12 43 44 #define TCPS_TERMINATING 0 45 #define TCPS_CLOSED 1 /* closed */ 46 #define TCPS_LISTEN 2 /* listening for connection */ 47 #define TCPS_SYN_SENT 3 /* active, have sent syn */ 48 #define TCPS_SYN_RECEIVED 4 /* have send and received syn */ 49 /* states < TCPS_ESTABLISHED are those where connections not established */ 50 #define TCPS_ESTABLISHED 5 /* established */ 51 #define TCPS_CLOSE_WAIT 6 /* rcvd fin, waiting for close */ 52 /* states > TCPS_CLOSE_WAIT are those where user has closed */ 53 #define TCPS_FIN_WAIT_1 7 /* have closed, sent fin */ 54 #define TCPS_CLOSING 8 /* closed xchd FIN; await FIN ACK */ 55 #define TCPS_LAST_ACK 9 /* had fin and close; await FIN ACK */ 56 /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */ 57 #define TCPS_FIN_WAIT_2 10 /* have closed, fin is acked */ 58 #define TCPS_TIME_WAIT 11 /* in 2*msl quiet wait after close */ 59 60 /* for KAME src sync over BSD*'s */ 61 #define TCP6_NSTATES TCP_NSTATES 62 #define TCP6S_CLOSED TCPS_CLOSED 63 #define TCP6S_LISTEN TCPS_LISTEN 64 #define TCP6S_SYN_SENT TCPS_SYN_SENT 65 #define TCP6S_SYN_RECEIVED TCPS_SYN_RECEIVED 66 #define TCP6S_ESTABLISHED TCPS_ESTABLISHED 67 #define TCP6S_CLOSE_WAIT TCPS_CLOSE_WAIT 68 #define TCP6S_FIN_WAIT_1 TCPS_FIN_WAIT_1 69 #define TCP6S_CLOSING TCPS_CLOSING 70 #define TCP6S_LAST_ACK TCPS_LAST_ACK 71 #define TCP6S_FIN_WAIT_2 TCPS_FIN_WAIT_2 72 #define TCP6S_TIME_WAIT TCPS_TIME_WAIT 73 74 #define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED) 75 #define TCPS_HAVEESTABLISHED(s) ((s) >= TCPS_ESTABLISHED) 76 #define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT) 77 78 #ifdef TCPOUTFLAGS 79 /* 80 * Flags used when sending segments in tcp_output. 81 * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally 82 * determined by state, with the proviso that TH_FIN is sent only 83 * if all data queued for output is included in the segment. 84 */ 85 static u_char tcp_outflags[TCP_NSTATES] = { 86 TH_RST|TH_ACK, /* 0, TERMINATING */ 87 TH_RST|TH_ACK, /* 1, CLOSED */ 88 0, /* 2, LISTEN */ 89 TH_SYN, /* 3, SYN_SENT */ 90 TH_SYN|TH_ACK, /* 4, SYN_RECEIVED */ 91 TH_ACK, /* 5, ESTABLISHED */ 92 TH_ACK, /* 6, CLOSE_WAIT */ 93 TH_FIN|TH_ACK, /* 7, FIN_WAIT_1 */ 94 TH_FIN|TH_ACK, /* 8, CLOSING */ 95 TH_FIN|TH_ACK, /* 9, LAST_ACK */ 96 TH_ACK, /* 10, FIN_WAIT_2 */ 97 TH_ACK, /* 11, TIME_WAIT */ 98 }; 99 #endif 100 101 #ifdef KPROF 102 int tcp_acounts[TCP_NSTATES][PRU_NREQ]; 103 #endif 104 105 #ifdef TCPSTATES 106 const char *tcpstates[] = { 107 "TERMINATING", 108 "CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD", 109 "ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING", 110 "LAST_ACK", "FIN_WAIT_2", "TIME_WAIT", 111 }; 112 #endif 113 114 #endif 115