Annotation of sys/netinet/tcp_fsm.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: tcp_fsm.h,v 1.8 2004/07/06 13:52:31 markus Exp $ */
2: /* $NetBSD: tcp_fsm.h,v 1.6 1994/10/14 16:01:48 mycroft Exp $ */
3:
4: /*
5: * Copyright (c) 1982, 1986, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. Neither the name of the University nor the names of its contributors
17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: *
32: * @(#)tcp_fsm.h 8.1 (Berkeley) 6/10/93
33: */
34:
35: #ifndef _NETINET_TCP_FSM_H_
36: #define _NETINET_TCP_FSM_H_
37:
38: /*
39: * TCP FSM state definitions.
40: * Per RFC793, September, 1981.
41: */
42:
43: #define TCP_NSTATES 11
44:
45: #define TCPS_CLOSED 0 /* closed */
46: #define TCPS_LISTEN 1 /* listening for connection */
47: #define TCPS_SYN_SENT 2 /* active, have sent syn */
48: #define TCPS_SYN_RECEIVED 3 /* have sent and received syn */
49: /* states < TCPS_ESTABLISHED are those where connections not established */
50: #define TCPS_ESTABLISHED 4 /* established */
51: #define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */
52: /* states > TCPS_CLOSE_WAIT are those where user has closed */
53: #define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */
54: #define TCPS_CLOSING 7 /* closed xchd FIN; await ACK */
55: #define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */
56: /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
57: #define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */
58: #define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */
59:
60: #define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED)
61: #define TCPS_HAVEESTABLISHED(s) ((s) >= TCPS_ESTABLISHED)
62: #define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT)
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: u_char tcp_outflags[TCP_NSTATES] = {
72: TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK,
73: TH_ACK, TH_ACK,
74: TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK,
75: };
76: #endif /* TCPOUTFLAGS */
77:
78: #ifdef KPROF
79: int tcp_acounts[TCP_NSTATES][PRU_NREQ];
80: #endif /* KPROF */
81:
82: #ifdef TCPSTATES
83: const char *tcpstates[] = {
84: "CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD",
85: "ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING",
86: "LAST_ACK", "FIN_WAIT_2", "TIME_WAIT",
87: };
88: #endif /* TCPSTATES */
89: #endif /* _NETINET_TCP_FSM_H_ */
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