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 | |