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 */ 36 37 #ifndef _NETINET_TCP_FSM_H_ 38 #define _NETINET_TCP_FSM_H_ 39 40 /* 41 * TCP FSM state definitions. 42 * Per RFC793, September, 1981. 43 */ 44 45 #define TCP_NSTATES 11 46 47 #define TCPS_CLOSED 0 /* closed */ 48 #define TCPS_LISTEN 1 /* listening for connection */ 49 #define TCPS_SYN_SENT 2 /* active, have sent syn */ 50 #define TCPS_SYN_RECEIVED 3 /* have send and received syn */ 51 /* states < TCPS_ESTABLISHED are those where connections not established */ 52 #define TCPS_ESTABLISHED 4 /* established */ 53 #define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */ 54 /* states > TCPS_CLOSE_WAIT are those where user has closed */ 55 #define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */ 56 #define TCPS_CLOSING 7 /* closed xchd FIN; await FIN ACK */ 57 #define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */ 58 /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */ 59 #define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */ 60 #define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */ 61 62 /* for KAME src sync over BSD*'s */ 63 #define TCP6_NSTATES TCP_NSTATES 64 #define TCP6S_CLOSED TCPS_CLOSED 65 #define TCP6S_LISTEN TCPS_LISTEN 66 #define TCP6S_SYN_SENT TCPS_SYN_SENT 67 #define TCP6S_SYN_RECEIVED TCPS_SYN_RECEIVED 68 #define TCP6S_ESTABLISHED TCPS_ESTABLISHED 69 #define TCP6S_CLOSE_WAIT TCPS_CLOSE_WAIT 70 #define TCP6S_FIN_WAIT_1 TCPS_FIN_WAIT_1 71 #define TCP6S_CLOSING TCPS_CLOSING 72 #define TCP6S_LAST_ACK TCPS_LAST_ACK 73 #define TCP6S_FIN_WAIT_2 TCPS_FIN_WAIT_2 74 #define TCP6S_TIME_WAIT TCPS_TIME_WAIT 75 76 #define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED) 77 #define TCPS_HAVEESTABLISHED(s) ((s) >= TCPS_ESTABLISHED) 78 #define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT) 79 80 #ifdef TCPOUTFLAGS 81 /* 82 * Flags used when sending segments in tcp_output. 83 * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally 84 * determined by state, with the proviso that TH_FIN is sent only 85 * if all data queued for output is included in the segment. 86 */ 87 static u_char tcp_outflags[TCP_NSTATES] = { 88 TH_RST|TH_ACK, /* 0, CLOSED */ 89 0, /* 1, LISTEN */ 90 TH_SYN, /* 2, SYN_SENT */ 91 TH_SYN|TH_ACK, /* 3, SYN_RECEIVED */ 92 TH_ACK, /* 4, ESTABLISHED */ 93 TH_ACK, /* 5, CLOSE_WAIT */ 94 TH_FIN|TH_ACK, /* 6, FIN_WAIT_1 */ 95 TH_FIN|TH_ACK, /* 7, CLOSING */ 96 TH_FIN|TH_ACK, /* 8, LAST_ACK */ 97 TH_ACK, /* 9, FIN_WAIT_2 */ 98 TH_ACK, /* 10, TIME_WAIT */ 99 }; 100 #endif 101 102 #ifdef KPROF 103 int tcp_acounts[TCP_NSTATES][PRU_NREQ]; 104 #endif 105 106 #ifdef TCPSTATES 107 char *tcpstates[] = { 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