tcp_fsm.h revision 1.16 1 1.16 maxv /* $NetBSD: tcp_fsm.h,v 1.16 2018/04/07 13:48:50 maxv Exp $ */
2 1.5 cgd
3 1.1 cgd /*
4 1.4 mycroft * Copyright (c) 1982, 1986, 1993
5 1.4 mycroft * The Regents of the University of California. All rights reserved.
6 1.1 cgd *
7 1.1 cgd * Redistribution and use in source and binary forms, with or without
8 1.1 cgd * modification, are permitted provided that the following conditions
9 1.1 cgd * are met:
10 1.1 cgd * 1. Redistributions of source code must retain the above copyright
11 1.1 cgd * notice, this list of conditions and the following disclaimer.
12 1.1 cgd * 2. Redistributions in binary form must reproduce the above copyright
13 1.1 cgd * notice, this list of conditions and the following disclaimer in the
14 1.1 cgd * documentation and/or other materials provided with the distribution.
15 1.12 agc * 3. Neither the name of the University nor the names of its contributors
16 1.1 cgd * may be used to endorse or promote products derived from this software
17 1.1 cgd * without specific prior written permission.
18 1.1 cgd *
19 1.1 cgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 1.1 cgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 1.1 cgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 1.1 cgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 1.1 cgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 1.1 cgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 1.1 cgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 1.1 cgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 1.1 cgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 1.1 cgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 1.1 cgd * SUCH DAMAGE.
30 1.1 cgd *
31 1.5 cgd * @(#)tcp_fsm.h 8.1 (Berkeley) 6/10/93
32 1.1 cgd */
33 1.1 cgd
34 1.8 perry #ifndef _NETINET_TCP_FSM_H_
35 1.8 perry #define _NETINET_TCP_FSM_H_
36 1.8 perry
37 1.1 cgd /*
38 1.1 cgd * TCP FSM state definitions.
39 1.1 cgd * Per RFC793, September, 1981.
40 1.1 cgd */
41 1.1 cgd
42 1.1 cgd #define TCP_NSTATES 11
43 1.1 cgd
44 1.1 cgd #define TCPS_CLOSED 0 /* closed */
45 1.1 cgd #define TCPS_LISTEN 1 /* listening for connection */
46 1.1 cgd #define TCPS_SYN_SENT 2 /* active, have sent syn */
47 1.1 cgd #define TCPS_SYN_RECEIVED 3 /* have send and received syn */
48 1.1 cgd /* states < TCPS_ESTABLISHED are those where connections not established */
49 1.1 cgd #define TCPS_ESTABLISHED 4 /* established */
50 1.1 cgd #define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */
51 1.1 cgd /* states > TCPS_CLOSE_WAIT are those where user has closed */
52 1.1 cgd #define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */
53 1.7 kleink #define TCPS_CLOSING 7 /* closed xchd FIN; await ACK */
54 1.1 cgd #define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */
55 1.1 cgd /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
56 1.1 cgd #define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */
57 1.1 cgd #define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */
58 1.1 cgd
59 1.1 cgd #define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED)
60 1.6 mycroft #define TCPS_HAVEESTABLISHED(s) ((s) >= TCPS_ESTABLISHED)
61 1.9 thorpej #define TCPS_HAVERCVDFIN(s) \
62 1.9 thorpej ((s) == TCPS_CLOSE_WAIT || ((s) >= TCPS_CLOSING && (s) != TCPS_FIN_WAIT_2))
63 1.1 cgd
64 1.1 cgd #ifdef TCPOUTFLAGS
65 1.1 cgd /*
66 1.1 cgd * Flags used when sending segments in tcp_output.
67 1.1 cgd * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally
68 1.1 cgd * determined by state, with the proviso that TH_FIN is sent only
69 1.1 cgd * if all data queued for output is included in the segment.
70 1.1 cgd */
71 1.11 matt const u_char tcp_outflags[TCP_NSTATES] = {
72 1.13 yamt TH_RST|TH_ACK, /* CLOSED */
73 1.13 yamt 0, /* LISTEN */
74 1.13 yamt TH_SYN, /* SYN_SENT */
75 1.13 yamt TH_SYN|TH_ACK, /* SYN_RCVD */
76 1.13 yamt TH_ACK, /* ESTABLISHED */
77 1.13 yamt TH_ACK, /* CLOSE_WAIT */
78 1.13 yamt TH_FIN|TH_ACK, /* FIN_WAIT_1 */
79 1.13 yamt TH_FIN|TH_ACK, /* CLOSING */
80 1.13 yamt TH_FIN|TH_ACK, /* LAST_ACK */
81 1.13 yamt TH_ACK, /* FIN_WAIT_2 */
82 1.13 yamt TH_ACK, /* TIME_WAIT */
83 1.1 cgd };
84 1.1 cgd #endif
85 1.1 cgd
86 1.1 cgd #ifdef TCPSTATES
87 1.11 matt const char * const tcpstates[] = {
88 1.1 cgd "CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD",
89 1.1 cgd "ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING",
90 1.1 cgd "LAST_ACK", "FIN_WAIT_2", "TIME_WAIT",
91 1.1 cgd };
92 1.14 matt #elif defined(_KERNEL)
93 1.14 matt extern const char * const tcpstates[];
94 1.1 cgd #endif
95 1.8 perry
96 1.15 elad #endif /* !_NETINET_TCP_FSM_H_ */
97