Commit | Line | Data |
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8ae0e4b4 | 1 | /* |
0880b18e | 2 | * Copyright (c) 1982, 1986 Regents of the University of California. |
8ae0e4b4 KM |
3 | * All rights reserved. The Berkeley software License Agreement |
4 | * specifies the terms and conditions for redistribution. | |
5 | * | |
0880b18e | 6 | * @(#)tcp_fsm.h 7.1 (Berkeley) %G% |
8ae0e4b4 | 7 | */ |
8381e15f BJ |
8 | |
9 | /* | |
2b4b57cd | 10 | * TCP FSM state definitions. |
2ff61f9d | 11 | * Per RFC793, September, 1981. |
8381e15f BJ |
12 | */ |
13 | ||
2ff61f9d BJ |
14 | #define TCP_NSTATES 11 |
15 | ||
16 | #define TCPS_CLOSED 0 /* closed */ | |
17 | #define TCPS_LISTEN 1 /* listening for connection */ | |
18 | #define TCPS_SYN_SENT 2 /* active, have sent syn */ | |
8a13b737 | 19 | #define TCPS_SYN_RECEIVED 3 /* have send and received syn */ |
a6503abf | 20 | /* states < TCPS_ESTABLISHED are those where connections not established */ |
2ff61f9d | 21 | #define TCPS_ESTABLISHED 4 /* established */ |
8a13b737 | 22 | #define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */ |
a6503abf | 23 | /* states > TCPS_CLOSE_WAIT are those where user has closed */ |
8a13b737 BJ |
24 | #define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */ |
25 | #define TCPS_CLOSING 7 /* closed xchd FIN; await FIN ACK */ | |
26 | #define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */ | |
27 | /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */ | |
28 | #define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */ | |
29 | #define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */ | |
8381e15f | 30 | |
8a13b737 | 31 | #define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED) |
2ff61f9d | 32 | #define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT) |
8a13b737 BJ |
33 | |
34 | #ifdef TCPOUTFLAGS | |
35 | /* | |
36 | * Flags used when sending segments in tcp_output. | |
37 | * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally | |
b454c3ea BJ |
38 | * determined by state, with the proviso that TH_FIN is sent only |
39 | * if all data queued for output is included in the segment. | |
8a13b737 BJ |
40 | */ |
41 | u_char tcp_outflags[TCP_NSTATES] = { | |
42 | TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK, | |
43 | TH_ACK, TH_ACK, | |
4aed14e3 | 44 | TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK, |
8a13b737 BJ |
45 | }; |
46 | #endif | |
8381e15f | 47 | |
9c5022e3 | 48 | #ifdef KPROF |
eb44bfb2 | 49 | int tcp_acounts[TCP_NSTATES][PRU_NREQ]; |
8381e15f BJ |
50 | #endif |
51 | ||
8a13b737 | 52 | #ifdef TCPSTATES |
8381e15f | 53 | char *tcpstates[] = { |
2ff61f9d | 54 | "CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD", |
4aed14e3 BJ |
55 | "ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING", |
56 | "LAST_ACK", "FIN_WAIT_2", "TIME_WAIT", | |
8381e15f | 57 | }; |
8381e15f | 58 | #endif |