xref: /onnv-gate/usr/src/uts/common/netinet/tcp_fsm.h (revision 0:68f95e015346)
1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate  * Copyright (c) 1997-1998 by Sun Microsystems, Inc.
3*0Sstevel@tonic-gate  * All rights reserved.
4*0Sstevel@tonic-gate  */
5*0Sstevel@tonic-gate 
6*0Sstevel@tonic-gate /*
7*0Sstevel@tonic-gate  * Copyright (c) 1982, 1986 Regents of the University of California.
8*0Sstevel@tonic-gate  * All rights reserved.  The Berkeley software License Agreement
9*0Sstevel@tonic-gate  * specifies the terms and conditions for redistribution.
10*0Sstevel@tonic-gate  */
11*0Sstevel@tonic-gate 
12*0Sstevel@tonic-gate /*
13*0Sstevel@tonic-gate  * TCP FSM state definitions.
14*0Sstevel@tonic-gate  * Per RFC793, September, 1981.
15*0Sstevel@tonic-gate  */
16*0Sstevel@tonic-gate 
17*0Sstevel@tonic-gate #ifndef	_NETINET_TCP_FSM_H
18*0Sstevel@tonic-gate #define	_NETINET_TCP_FSM_H
19*0Sstevel@tonic-gate 
20*0Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
21*0Sstevel@tonic-gate /* tcp_fsm.h 1.7 88/08/19 SMI; from UCB 7.1 6/5/86	*/
22*0Sstevel@tonic-gate 
23*0Sstevel@tonic-gate #ifdef	__cplusplus
24*0Sstevel@tonic-gate extern "C" {
25*0Sstevel@tonic-gate #endif
26*0Sstevel@tonic-gate 
27*0Sstevel@tonic-gate #define	TCP_NSTATES	11
28*0Sstevel@tonic-gate 
29*0Sstevel@tonic-gate #define	TCPS_CLOSED		0	/* closed */
30*0Sstevel@tonic-gate #define	TCPS_LISTEN		1	/* listening for connection */
31*0Sstevel@tonic-gate #define	TCPS_SYN_SENT		2	/* active, have sent syn */
32*0Sstevel@tonic-gate #define	TCPS_SYN_RECEIVED	3	/* have send and received syn */
33*0Sstevel@tonic-gate /* states < TCPS_ESTABLISHED are those where connections not established */
34*0Sstevel@tonic-gate #define	TCPS_ESTABLISHED	4	/* established */
35*0Sstevel@tonic-gate #define	TCPS_CLOSE_WAIT		5	/* rcvd fin, waiting for close */
36*0Sstevel@tonic-gate /* states > TCPS_CLOSE_WAIT are those where user has closed */
37*0Sstevel@tonic-gate #define	TCPS_FIN_WAIT_1		6	/* have closed, sent fin */
38*0Sstevel@tonic-gate #define	TCPS_CLOSING		7	/* closed xchd FIN; await FIN ACK */
39*0Sstevel@tonic-gate #define	TCPS_LAST_ACK		8	/* had fin and close; await FIN ACK */
40*0Sstevel@tonic-gate /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
41*0Sstevel@tonic-gate #define	TCPS_FIN_WAIT_2		9	/* have closed, fin is acked */
42*0Sstevel@tonic-gate #define	TCPS_TIME_WAIT		10	/* in 2*msl quiet wait after close */
43*0Sstevel@tonic-gate 
44*0Sstevel@tonic-gate #define	TCPS_HAVERCVDSYN(s)	((s) >= TCPS_SYN_RECEIVED)
45*0Sstevel@tonic-gate #define	TCPS_HAVERCVDFIN(s)	((s) >= TCPS_TIME_WAIT)
46*0Sstevel@tonic-gate 
47*0Sstevel@tonic-gate #ifdef	TCPOUTFLAGS
48*0Sstevel@tonic-gate /*
49*0Sstevel@tonic-gate  * Flags used when sending segments in tcp_output.
50*0Sstevel@tonic-gate  * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally
51*0Sstevel@tonic-gate  * determined by state, with the proviso that TH_FIN is sent only
52*0Sstevel@tonic-gate  * if all data queued for output is included in the segment.
53*0Sstevel@tonic-gate  */
54*0Sstevel@tonic-gate uchar_t	tcp_outflags[TCP_NSTATES] = {
55*0Sstevel@tonic-gate     TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK,
56*0Sstevel@tonic-gate     TH_ACK, TH_ACK,
57*0Sstevel@tonic-gate     TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK,
58*0Sstevel@tonic-gate };
59*0Sstevel@tonic-gate #endif
60*0Sstevel@tonic-gate 
61*0Sstevel@tonic-gate #ifdef KPROF
62*0Sstevel@tonic-gate int	tcp_acounts[TCP_NSTATES][PRU_NREQ];
63*0Sstevel@tonic-gate #endif
64*0Sstevel@tonic-gate 
65*0Sstevel@tonic-gate #ifdef	TCPSTATES
66*0Sstevel@tonic-gate char *tcpstates[] = {
67*0Sstevel@tonic-gate 	"CLOSED",	"LISTEN",	"SYN_SENT",	"SYN_RCVD",
68*0Sstevel@tonic-gate 	"ESTABLISHED",	"CLOSE_WAIT",	"FIN_WAIT_1",	"CLOSING",
69*0Sstevel@tonic-gate 	"LAST_ACK",	"FIN_WAIT_2",	"TIME_WAIT",
70*0Sstevel@tonic-gate };
71*0Sstevel@tonic-gate #endif
72*0Sstevel@tonic-gate 
73*0Sstevel@tonic-gate #ifdef	__cplusplus
74*0Sstevel@tonic-gate }
75*0Sstevel@tonic-gate #endif
76*0Sstevel@tonic-gate 
77*0Sstevel@tonic-gate #endif	/* _NETINET_TCP_FSM_H */
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