2 * Copyright (c) 1997-1998 by Sun Microsystems, Inc.
7 * Copyright (c) 1982, 1986 Regents of the University of California.
8 * All rights reserved. The Berkeley software License Agreement
9 * specifies the terms and conditions for redistribution.
13 * TCP FSM state definitions.
14 * Per RFC793, September, 1981.
17 #ifndef _NETINET_TCP_FSM_H
18 #define _NETINET_TCP_FSM_H
20 #pragma ident "%Z%%M% %I% %E% SMI"
21 /* tcp_fsm.h 1.7 88/08/19 SMI; from UCB 7.1 6/5/86 */
27 #define TCP_NSTATES 11
29 #define TCPS_CLOSED 0 /* closed */
30 #define TCPS_LISTEN 1 /* listening for connection */
31 #define TCPS_SYN_SENT 2 /* active, have sent syn */
32 #define TCPS_SYN_RECEIVED 3 /* have send and received syn */
33 /* states < TCPS_ESTABLISHED are those where connections not established */
34 #define TCPS_ESTABLISHED 4 /* established */
35 #define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */
36 /* states > TCPS_CLOSE_WAIT are those where user has closed */
37 #define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */
38 #define TCPS_CLOSING 7 /* closed xchd FIN; await FIN ACK */
39 #define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */
40 /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
41 #define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */
42 #define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */
44 #define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED)
45 #define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT)
49 * Flags used when sending segments in tcp_output.
50 * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally
51 * determined by state, with the proviso that TH_FIN is sent only
52 * if all data queued for output is included in the segment.
54 uchar_t tcp_outflags
[TCP_NSTATES
] = {
55 TH_RST
|TH_ACK
, 0, TH_SYN
, TH_SYN
|TH_ACK
,
57 TH_FIN
|TH_ACK
, TH_FIN
|TH_ACK
, TH_FIN
|TH_ACK
, TH_ACK
, TH_ACK
,
62 int tcp_acounts
[TCP_NSTATES
][PRU_NREQ
];
67 "CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD",
68 "ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING",
69 "LAST_ACK", "FIN_WAIT_2", "TIME_WAIT",
77 #endif /* _NETINET_TCP_FSM_H */