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 * 4. 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 * $FreeBSD$ 31 */ 32 33 #ifndef _NETINET_TCP_FSM_H_ 34 #define _NETINET_TCP_FSM_H_ 35 36 /* 37 * TCP FSM state definitions. 38 * Per RFC793, September, 1981. 39 */ 40 41 #define TCP_NSTATES 11 42 43 #define TCPS_CLOSED 0 /* closed */ 44 #define TCPS_LISTEN 1 /* listening for connection */ 45 #define TCPS_SYN_SENT 2 /* active, have sent syn */ 46 #define TCPS_SYN_RECEIVED 3 /* have send and received syn */ 47 /* states < TCPS_ESTABLISHED are those where connections not established */ 48 #define TCPS_ESTABLISHED 4 /* established */ 49 #define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */ 50 /* states > TCPS_CLOSE_WAIT are those where user has closed */ 51 #define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */ 52 #define TCPS_CLOSING 7 /* closed xchd FIN; await FIN ACK */ 53 #define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */ 54 /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */ 55 #define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */ 56 #define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */ 57 58 /* for KAME src sync over BSD*'s */ 59 #define TCP6_NSTATES TCP_NSTATES 60 #define TCP6S_CLOSED TCPS_CLOSED 61 #define TCP6S_LISTEN TCPS_LISTEN 62 #define TCP6S_SYN_SENT TCPS_SYN_SENT 63 #define TCP6S_SYN_RECEIVED TCPS_SYN_RECEIVED 64 #define TCP6S_ESTABLISHED TCPS_ESTABLISHED 65 #define TCP6S_CLOSE_WAIT TCPS_CLOSE_WAIT 66 #define TCP6S_FIN_WAIT_1 TCPS_FIN_WAIT_1 67 #define TCP6S_CLOSING TCPS_CLOSING 68 #define TCP6S_LAST_ACK TCPS_LAST_ACK 69 #define TCP6S_FIN_WAIT_2 TCPS_FIN_WAIT_2 70 #define TCP6S_TIME_WAIT TCPS_TIME_WAIT 71 72 #define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED) 73 #define TCPS_HAVEESTABLISHED(s) ((s) >= TCPS_ESTABLISHED) 74 #define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT) 75 76 #ifdef TCPOUTFLAGS 77 /* 78 * Flags used when sending segments in tcp_output. 79 * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally 80 * determined by state, with the proviso that TH_FIN is sent only 81 * if all data queued for output is included in the segment. 82 */ 83 static u_char tcp_outflags[TCP_NSTATES] = { 84 TH_RST|TH_ACK, /* 0, CLOSED */ 85 0, /* 1, LISTEN */ 86 TH_SYN, /* 2, SYN_SENT */ 87 TH_SYN|TH_ACK, /* 3, SYN_RECEIVED */ 88 TH_ACK, /* 4, ESTABLISHED */ 89 TH_ACK, /* 5, CLOSE_WAIT */ 90 TH_FIN|TH_ACK, /* 6, FIN_WAIT_1 */ 91 TH_FIN|TH_ACK, /* 7, CLOSING */ 92 TH_FIN|TH_ACK, /* 8, LAST_ACK */ 93 TH_ACK, /* 9, FIN_WAIT_2 */ 94 TH_ACK, /* 10, TIME_WAIT */ 95 }; 96 #endif 97 98 #ifdef KPROF 99 int tcp_acounts[TCP_NSTATES][PRU_NREQ]; 100 #endif 101 102 #ifdef TCPSTATES 103 const char *tcpstates[] = { 104 "CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD", 105 "ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING", 106 "LAST_ACK", "FIN_WAIT_2", "TIME_WAIT", 107 }; 108 #endif 109 110 #endif 111