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b688fc87 WJ |
1 | /* |
2 | * Copyright (c) 1982, 1986 Regents of the University of California. | |
3 | * 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 7.4 (Berkeley) 6/28/90 | |
34 | */ | |
35 | ||
36 | /* | |
37 | * TCP FSM state definitions. | |
38 | * Per RFC793, September, 1981. | |
39 | */ | |
40 | ||
41 | #define TCP_NSTATES 11 | |
42 | ||
43 | #define TCPS_CLOSED 0 /* closed */ | |
44 | #define TCPS_LISTEN 1 /* listening for connection */ | |
45 | #define TCPS_SYN_SENT 2 /* active, have sent syn */ | |
46 | #define TCPS_SYN_RECEIVED 3 /* have send and received syn */ | |
47 | /* states < TCPS_ESTABLISHED are those where connections not established */ | |
48 | #define TCPS_ESTABLISHED 4 /* established */ | |
49 | #define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */ | |
50 | /* states > TCPS_CLOSE_WAIT are those where user has closed */ | |
51 | #define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */ | |
52 | #define TCPS_CLOSING 7 /* closed xchd FIN; await FIN ACK */ | |
53 | #define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */ | |
54 | /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */ | |
55 | #define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */ | |
56 | #define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */ | |
57 | ||
58 | #define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED) | |
59 | #define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT) | |
60 | ||
61 | #ifdef TCPOUTFLAGS | |
62 | /* | |
63 | * Flags used when sending segments in tcp_output. | |
64 | * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally | |
65 | * determined by state, with the proviso that TH_FIN is sent only | |
66 | * if all data queued for output is included in the segment. | |
67 | */ | |
68 | u_char tcp_outflags[TCP_NSTATES] = { | |
69 | TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK, | |
70 | TH_ACK, TH_ACK, | |
71 | TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK, | |
72 | }; | |
73 | #endif | |
74 | ||
75 | #ifdef KPROF | |
76 | int tcp_acounts[TCP_NSTATES][PRU_NREQ]; | |
77 | #endif | |
78 | ||
79 | #ifdef TCPSTATES | |
80 | char *tcpstates[] = { | |
81 | "CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD", | |
82 | "ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING", | |
83 | "LAST_ACK", "FIN_WAIT_2", "TIME_WAIT", | |
84 | }; | |
85 | #endif |