source: rtems/cpukit/libnetworking/netinet/tcp_fsm.h @ 4bf1801

4.104.114.84.95
Last change on this file since 4bf1801 was 39e6e65a, checked in by Joel Sherrill <joel.sherrill@…>, on 08/19/98 at 21:32:28

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