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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 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_fsm.h 8.1 (Berkeley) 6/10/93 34 * $FreeBSD: src/sys/netinet/tcp_fsm.h,v 1.14 1999/11/07 04:18:30 jlemon Exp $ 35 * $DragonFly: src/sys/netinet/tcp_fsm.h,v 1.5 2004/09/22 08:54:27 joerg Exp $ 36 */ 37 38 #ifndef _NETINET_TCP_FSM_H_ 39 #define _NETINET_TCP_FSM_H_ 40 41 /* 42 * TCP FSM state definitions. 43 * Per RFC793, September, 1981. 44 */ 45 46 #define TCP_NSTATES 12 47 48 #define TCPS_TERMINATING 0 49 #define TCPS_CLOSED 1 /* closed */ 50 #define TCPS_LISTEN 2 /* listening for connection */ 51 #define TCPS_SYN_SENT 3 /* active, have sent syn */ 52 #define TCPS_SYN_RECEIVED 4 /* have send and received syn */ 53 /* states < TCPS_ESTABLISHED are those where connections not established */ 54 #define TCPS_ESTABLISHED 5 /* established */ 55 #define TCPS_CLOSE_WAIT 6 /* rcvd fin, waiting for close */ 56 /* states > TCPS_CLOSE_WAIT are those where user has closed */ 57 #define TCPS_FIN_WAIT_1 7 /* have closed, sent fin */ 58 #define TCPS_CLOSING 8 /* closed xchd FIN; await FIN ACK */ 59 #define TCPS_LAST_ACK 9 /* had fin and close; await FIN ACK */ 60 /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */ 61 #define TCPS_FIN_WAIT_2 10 /* have closed, fin is acked */ 62 #define TCPS_TIME_WAIT 11 /* in 2*msl quiet wait after close */ 63 64 /* for KAME src sync over BSD*'s */ 65 #define TCP6_NSTATES TCP_NSTATES 66 #define TCP6S_CLOSED TCPS_CLOSED 67 #define TCP6S_LISTEN TCPS_LISTEN 68 #define TCP6S_SYN_SENT TCPS_SYN_SENT 69 #define TCP6S_SYN_RECEIVED TCPS_SYN_RECEIVED 70 #define TCP6S_ESTABLISHED TCPS_ESTABLISHED 71 #define TCP6S_CLOSE_WAIT TCPS_CLOSE_WAIT 72 #define TCP6S_FIN_WAIT_1 TCPS_FIN_WAIT_1 73 #define TCP6S_CLOSING TCPS_CLOSING 74 #define TCP6S_LAST_ACK TCPS_LAST_ACK 75 #define TCP6S_FIN_WAIT_2 TCPS_FIN_WAIT_2 76 #define TCP6S_TIME_WAIT TCPS_TIME_WAIT 77 78 #define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED) 79 #define TCPS_HAVEESTABLISHED(s) ((s) >= TCPS_ESTABLISHED) 80 #define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT) 81 82 #ifdef TCPOUTFLAGS 83 /* 84 * Flags used when sending segments in tcp_output. 85 * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally 86 * determined by state, with the proviso that TH_FIN is sent only 87 * if all data queued for output is included in the segment. 88 */ 89 static u_char tcp_outflags[TCP_NSTATES] = { 90 TH_RST|TH_ACK, /* 0, TERMINATING */ 91 TH_RST|TH_ACK, /* 1, CLOSED */ 92 0, /* 2, LISTEN */ 93 TH_SYN, /* 3, SYN_SENT */ 94 TH_SYN|TH_ACK, /* 4, SYN_RECEIVED */ 95 TH_ACK, /* 5, ESTABLISHED */ 96 TH_ACK, /* 6, CLOSE_WAIT */ 97 TH_FIN|TH_ACK, /* 7, FIN_WAIT_1 */ 98 TH_FIN|TH_ACK, /* 8, CLOSING */ 99 TH_FIN|TH_ACK, /* 9, LAST_ACK */ 100 TH_ACK, /* 10, FIN_WAIT_2 */ 101 TH_ACK, /* 11, TIME_WAIT */ 102 }; 103 #endif 104 105 #ifdef KPROF 106 int tcp_acounts[TCP_NSTATES][PRU_NREQ]; 107 #endif 108 109 #ifdef TCPSTATES 110 const char *tcpstates[] = { 111 "TERMINATING", 112 "CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD", 113 "ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING", 114 "LAST_ACK", "FIN_WAIT_2", "TIME_WAIT", 115 }; 116 #endif 117 118 #endif 119