| 1 | /* |
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| 2 | * Copyright (c) 1982, 1986, 1993 |
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| 3 | * The Regents of the University of California. All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * 1. Redistributions of source code must retain the above copyright |
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| 9 | * notice, this list of conditions and the following disclaimer. |
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 11 | * notice, this list of conditions and the following disclaimer in the |
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| 12 | * documentation and/or other materials provided with the distribution. |
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| 13 | * 3. All advertising materials mentioning features or use of this software |
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| 14 | * must display the following acknowledgement: |
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| 15 | * This product includes software developed by the University of |
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| 16 | * California, Berkeley and its contributors. |
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| 17 | * 4. Neither the name of the University nor the names of its contributors |
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| 18 | * may be used to endorse or promote products derived from this software |
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| 19 | * without specific prior written permission. |
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| 20 | * |
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| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 31 | * SUCH DAMAGE. |
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| 32 | * |
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| 33 | * @(#)tcp_fsm.h 8.1 (Berkeley) 6/10/93 |
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| 34 | * $FreeBSD: src/sys/netinet/tcp_fsm.h,v 1.15 2002/02/03 11:57:32 markm Exp $ |
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| 35 | */ |
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| 36 | |
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| 37 | #ifndef _NETINET_TCP_FSM_H_ |
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| 38 | #define _NETINET_TCP_FSM_H_ |
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| 39 | |
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| 40 | /* |
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| 41 | * TCP FSM state definitions. |
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| 42 | * Per RFC793, September, 1981. |
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| 43 | */ |
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| 44 | |
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| 45 | #define TCP_NSTATES 11 |
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| 46 | |
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| 47 | #define TCPS_CLOSED 0 /* closed */ |
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| 48 | #define TCPS_LISTEN 1 /* listening for connection */ |
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| 49 | #define TCPS_SYN_SENT 2 /* active, have sent syn */ |
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| 50 | #define TCPS_SYN_RECEIVED 3 /* have send and received syn */ |
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| 51 | /* states < TCPS_ESTABLISHED are those where connections not established */ |
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| 52 | #define TCPS_ESTABLISHED 4 /* established */ |
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| 53 | #define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */ |
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| 54 | /* states > TCPS_CLOSE_WAIT are those where user has closed */ |
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| 55 | #define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */ |
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| 56 | #define TCPS_CLOSING 7 /* closed xchd FIN; await FIN ACK */ |
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| 57 | #define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */ |
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| 58 | /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */ |
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| 59 | #define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */ |
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| 60 | #define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */ |
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| 61 | |
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| 62 | /* for KAME src sync over BSD*'s */ |
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| 63 | #define TCP6_NSTATES TCP_NSTATES |
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| 64 | #define TCP6S_CLOSED TCPS_CLOSED |
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| 65 | #define TCP6S_LISTEN TCPS_LISTEN |
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| 66 | #define TCP6S_SYN_SENT TCPS_SYN_SENT |
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| 67 | #define TCP6S_SYN_RECEIVED TCPS_SYN_RECEIVED |
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| 68 | #define TCP6S_ESTABLISHED TCPS_ESTABLISHED |
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| 69 | #define TCP6S_CLOSE_WAIT TCPS_CLOSE_WAIT |
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| 70 | #define TCP6S_FIN_WAIT_1 TCPS_FIN_WAIT_1 |
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| 71 | #define TCP6S_CLOSING TCPS_CLOSING |
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| 72 | #define TCP6S_LAST_ACK TCPS_LAST_ACK |
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| 73 | #define TCP6S_FIN_WAIT_2 TCPS_FIN_WAIT_2 |
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| 74 | #define TCP6S_TIME_WAIT TCPS_TIME_WAIT |
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| 75 | |
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| 76 | #define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED) |
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| 77 | #define TCPS_HAVEESTABLISHED(s) ((s) >= TCPS_ESTABLISHED) |
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| 78 | #define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT) |
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| 79 | |
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| 80 | #ifdef TCPOUTFLAGS |
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| 81 | /* |
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| 82 | * Flags used when sending segments in tcp_output. |
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| 83 | * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally |
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| 84 | * determined by state, with the proviso that TH_FIN is sent only |
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| 85 | * if all data queued for output is included in the segment. |
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| 86 | */ |
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| 87 | static u_char tcp_outflags[TCP_NSTATES] = { |
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| 88 | TH_RST|TH_ACK, /* 0, CLOSED */ |
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| 89 | 0, /* 1, LISTEN */ |
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| 90 | TH_SYN, /* 2, SYN_SENT */ |
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| 91 | TH_SYN|TH_ACK, /* 3, SYN_RECEIVED */ |
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| 92 | TH_ACK, /* 4, ESTABLISHED */ |
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| 93 | TH_ACK, /* 5, CLOSE_WAIT */ |
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| 94 | TH_FIN|TH_ACK, /* 6, FIN_WAIT_1 */ |
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| 95 | TH_FIN|TH_ACK, /* 7, CLOSING */ |
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| 96 | TH_FIN|TH_ACK, /* 8, LAST_ACK */ |
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| 97 | TH_ACK, /* 9, FIN_WAIT_2 */ |
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| 98 | TH_ACK, /* 10, TIME_WAIT */ |
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| 99 | }; |
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| 100 | #endif |
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| 101 | |
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| 102 | #ifdef KPROF |
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| 103 | int tcp_acounts[TCP_NSTATES][PRU_NREQ]; |
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| 104 | #endif |
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| 105 | |
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| 106 | #ifdef TCPSTATES |
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| 107 | const char *tcpstates[] = { |
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| 108 | "CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD", |
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| 109 | "ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING", |
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| 110 | "LAST_ACK", "FIN_WAIT_2", "TIME_WAIT", |
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| 111 | }; |
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| 112 | #endif |
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| 113 | |
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| 114 | #endif |
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