| 1 | /* $NetBSD: tcp_fsm.h,v 1.15 2005/12/10 23:36:23 elad Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1982, 1986, 1993 |
| 5 | * The Regents of the University of California. All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * 3. Neither the name of the University nor the names of its contributors |
| 16 | * may be used to endorse or promote products derived from this software |
| 17 | * without specific prior written permission. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 29 | * SUCH DAMAGE. |
| 30 | * |
| 31 | * @(#)tcp_fsm.h 8.1 (Berkeley) 6/10/93 |
| 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 11 |
| 43 | |
| 44 | #define TCPS_CLOSED 0 /* closed */ |
| 45 | #define TCPS_LISTEN 1 /* listening for connection */ |
| 46 | #define TCPS_SYN_SENT 2 /* active, have sent syn */ |
| 47 | #define TCPS_SYN_RECEIVED 3 /* have send and received syn */ |
| 48 | /* states < TCPS_ESTABLISHED are those where connections not established */ |
| 49 | #define TCPS_ESTABLISHED 4 /* established */ |
| 50 | #define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */ |
| 51 | /* states > TCPS_CLOSE_WAIT are those where user has closed */ |
| 52 | #define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */ |
| 53 | #define TCPS_CLOSING 7 /* closed xchd FIN; await ACK */ |
| 54 | #define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */ |
| 55 | /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */ |
| 56 | #define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */ |
| 57 | #define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */ |
| 58 | |
| 59 | #define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED) |
| 60 | #define TCPS_HAVEESTABLISHED(s) ((s) >= TCPS_ESTABLISHED) |
| 61 | #define TCPS_HAVERCVDFIN(s) \ |
| 62 | ((s) == TCPS_CLOSE_WAIT || ((s) >= TCPS_CLOSING && (s) != TCPS_FIN_WAIT_2)) |
| 63 | |
| 64 | #ifdef TCPOUTFLAGS |
| 65 | /* |
| 66 | * Flags used when sending segments in tcp_output. |
| 67 | * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally |
| 68 | * determined by state, with the proviso that TH_FIN is sent only |
| 69 | * if all data queued for output is included in the segment. |
| 70 | */ |
| 71 | const u_char tcp_outflags[TCP_NSTATES] = { |
| 72 | TH_RST|TH_ACK, /* CLOSED */ |
| 73 | 0, /* LISTEN */ |
| 74 | TH_SYN, /* SYN_SENT */ |
| 75 | TH_SYN|TH_ACK, /* SYN_RCVD */ |
| 76 | TH_ACK, /* ESTABLISHED */ |
| 77 | TH_ACK, /* CLOSE_WAIT */ |
| 78 | TH_FIN|TH_ACK, /* FIN_WAIT_1 */ |
| 79 | TH_FIN|TH_ACK, /* CLOSING */ |
| 80 | TH_FIN|TH_ACK, /* LAST_ACK */ |
| 81 | TH_ACK, /* FIN_WAIT_2 */ |
| 82 | TH_ACK, /* TIME_WAIT */ |
| 83 | }; |
| 84 | #endif |
| 85 | |
| 86 | #ifdef KPROF |
| 87 | int tcp_acounts[TCP_NSTATES][PRU_NREQ]; |
| 88 | #endif |
| 89 | |
| 90 | #ifdef TCPSTATES |
| 91 | const char * const tcpstates[] = { |
| 92 | "CLOSED" , "LISTEN" , "SYN_SENT" , "SYN_RCVD" , |
| 93 | "ESTABLISHED" , "CLOSE_WAIT" , "FIN_WAIT_1" , "CLOSING" , |
| 94 | "LAST_ACK" , "FIN_WAIT_2" , "TIME_WAIT" , |
| 95 | }; |
| 96 | #elif defined(_KERNEL) |
| 97 | extern const char * const tcpstates[]; |
| 98 | #endif |
| 99 | |
| 100 | #endif /* !_NETINET_TCP_FSM_H_ */ |
| 101 | |