Commit | Line | Data |
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8ae0e4b4 | 1 | /* |
0880b18e | 2 | * Copyright (c) 1982, 1986 Regents of the University of California. |
2b6b6284 | 3 | * All rights reserved. |
8ae0e4b4 | 4 | * |
dbf0c423 | 5 | * %sccs.include.redist.c% |
2b6b6284 | 6 | * |
dbf0c423 | 7 | * @(#)tcp_fsm.h 7.4 (Berkeley) %G% |
8ae0e4b4 | 8 | */ |
8381e15f BJ |
9 | |
10 | /* | |
2b4b57cd | 11 | * TCP FSM state definitions. |
2ff61f9d | 12 | * Per RFC793, September, 1981. |
8381e15f BJ |
13 | */ |
14 | ||
2ff61f9d BJ |
15 | #define TCP_NSTATES 11 |
16 | ||
17 | #define TCPS_CLOSED 0 /* closed */ | |
18 | #define TCPS_LISTEN 1 /* listening for connection */ | |
19 | #define TCPS_SYN_SENT 2 /* active, have sent syn */ | |
8a13b737 | 20 | #define TCPS_SYN_RECEIVED 3 /* have send and received syn */ |
a6503abf | 21 | /* states < TCPS_ESTABLISHED are those where connections not established */ |
2ff61f9d | 22 | #define TCPS_ESTABLISHED 4 /* established */ |
8a13b737 | 23 | #define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */ |
a6503abf | 24 | /* states > TCPS_CLOSE_WAIT are those where user has closed */ |
8a13b737 BJ |
25 | #define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */ |
26 | #define TCPS_CLOSING 7 /* closed xchd FIN; await FIN ACK */ | |
27 | #define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */ | |
28 | /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */ | |
29 | #define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */ | |
30 | #define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */ | |
8381e15f | 31 | |
8a13b737 | 32 | #define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED) |
2ff61f9d | 33 | #define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT) |
8a13b737 BJ |
34 | |
35 | #ifdef TCPOUTFLAGS | |
36 | /* | |
37 | * Flags used when sending segments in tcp_output. | |
38 | * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally | |
b454c3ea BJ |
39 | * determined by state, with the proviso that TH_FIN is sent only |
40 | * if all data queued for output is included in the segment. | |
8a13b737 BJ |
41 | */ |
42 | u_char tcp_outflags[TCP_NSTATES] = { | |
43 | TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK, | |
44 | TH_ACK, TH_ACK, | |
4aed14e3 | 45 | TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK, |
8a13b737 BJ |
46 | }; |
47 | #endif | |
8381e15f | 48 | |
9c5022e3 | 49 | #ifdef KPROF |
eb44bfb2 | 50 | int tcp_acounts[TCP_NSTATES][PRU_NREQ]; |
8381e15f BJ |
51 | #endif |
52 | ||
8a13b737 | 53 | #ifdef TCPSTATES |
8381e15f | 54 | char *tcpstates[] = { |
2ff61f9d | 55 | "CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD", |
4aed14e3 BJ |
56 | "ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING", |
57 | "LAST_ACK", "FIN_WAIT_2", "TIME_WAIT", | |
8381e15f | 58 | }; |
8381e15f | 59 | #endif |