Watt-32 tcp/ip  2.2 dev-rel.10
tcp_fsm.h
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1 
5 /*
6  * Copyright (c) 1982, 1986, 1993
7  * The Regents of the University of California. All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  * notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  * notice, this list of conditions and the following disclaimer in the
16  * documentation and/or other materials provided with the distribution.
17  * 3. All advertising materials mentioning features or use of this software
18  * must display the following acknowledgement:
19  * This product includes software developed by the University of
20  * California, Berkeley and its contributors.
21  * 4. Neither the name of the University nor the names of its contributors
22  * may be used to endorse or promote products derived from this software
23  * without specific prior written permission.
24  *
25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28  * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35  * SUCH DAMAGE.
36  *
37  * @(#)tcp_fsm.h 8.1 (Berkeley) 6/10/93
38  * $Id: tcp_fsm.h,v 1.7 1995/11/14 20:34:34 phk Exp $
39  */
40 
41 #ifndef __NETINET_TCP_FSM_H
42 #define __NETINET_TCP_FSM_H
43 
44 /*
45  * TCP FSM state definitions.
46  * Per RFC793, September, 1981.
47  */
48 
49 #define TCP_NSTATES 11
50 
51 #define TCPS_CLOSED 0 /* closed */
52 #define TCPS_LISTEN 1 /* listening for connection */
53 #define TCPS_SYN_SENT 2 /* active, have sent syn */
54 #define TCPS_SYN_RECEIVED 3 /* have send and received syn */
55 /* states < TCPS_ESTABLISHED are those where connections not established */
56 #define TCPS_ESTABLISHED 4 /* established */
57 #define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */
58 /* states > TCPS_CLOSE_WAIT are those where user has closed */
59 #define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */
60 #define TCPS_CLOSING 7 /* closed xchd FIN; await FIN ACK */
61 #define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */
62 /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
63 #define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */
64 #define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */
65 
66 #define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED)
67 #define TCPS_HAVEESTABLISHED(s) ((s) >= TCPS_ESTABLISHED)
68 #define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT)
69 
70 #ifdef TCPOUTFLAGS
71 /*
72  * Flags used when sending segments in tcp_output.
73  * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally
74  * determined by state, with the proviso that TH_FIN is sent only
75  * if all data queued for output is included in the segment.
76  */
77 static u_char tcp_outflags[TCP_NSTATES] = {
78  TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK,
79  TH_ACK, TH_ACK,
80  TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK,
81 };
82 #endif
83 
84 #ifdef KPROF
85 int tcp_acounts[TCP_NSTATES][PRU_NREQ];
86 #endif
87 
88 #ifdef TCPSTATES
89 char *tcpstates[] = {
90  "CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD",
91  "ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING",
92  "LAST_ACK", "FIN_WAIT_2", "TIME_WAIT",
93 };
94 #endif
95 
96 #endif