usr/src/sys/netinet/tcp_fsm.h

/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)tcp_fsm.h	7.4 (Berkeley) %G%
 */

/*
 * TCP FSM state definitions.
 * Per RFC793, September, 1981.
 */

#define	TCP_NSTATES	11

#define	TCPS_CLOSED		0	/* closed */
#define	TCPS_LISTEN		1	/* listening for connection */
#define	TCPS_SYN_SENT		2	/* active, have sent syn */
#define	TCPS_SYN_RECEIVED	3	/* have send and received syn */
/* states < TCPS_ESTABLISHED are those where connections not established */
#define	TCPS_ESTABLISHED	4	/* established */
#define	TCPS_CLOSE_WAIT		5	/* rcvd fin, waiting for close */
/* states > TCPS_CLOSE_WAIT are those where user has closed */
#define	TCPS_FIN_WAIT_1		6	/* have closed, sent fin */
#define	TCPS_CLOSING		7	/* closed xchd FIN; await FIN ACK */
#define	TCPS_LAST_ACK		8	/* had fin and close; await FIN ACK */
/* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
#define	TCPS_FIN_WAIT_2		9	/* have closed, fin is acked */
#define	TCPS_TIME_WAIT		10	/* in 2*msl quiet wait after close */

#define	TCPS_HAVERCVDSYN(s)	((s) >= TCPS_SYN_RECEIVED)
#define	TCPS_HAVERCVDFIN(s)	((s) >= TCPS_TIME_WAIT)

#ifdef	TCPOUTFLAGS
/*
 * Flags used when sending segments in tcp_output.
 * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally
 * determined by state, with the proviso that TH_FIN is sent only
 * if all data queued for output is included in the segment.
 */
u_char	tcp_outflags[TCP_NSTATES] = {
    TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK,
    TH_ACK, TH_ACK,
    TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK,
};
#endif

#ifdef KPROF
int	tcp_acounts[TCP_NSTATES][PRU_NREQ];
#endif

#ifdef	TCPSTATES
char *tcpstates[] = {
	"CLOSED",	"LISTEN",	"SYN_SENT",	"SYN_RCVD",
	"ESTABLISHED",	"CLOSE_WAIT",	"FIN_WAIT_1",	"CLOSING",
	"LAST_ACK",	"FIN_WAIT_2",	"TIME_WAIT",
};
#endif
Commit	Line	Data
	1	/*
	2	* Copyright (c) 1982, 1986 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* %sccs.include.redist.c%
	6	*
	7	* @(#)tcp_fsm.h 7.4 (Berkeley) %G%
	8	*/
	9
	10	/*
	11	* TCP FSM state definitions.
	12	* Per RFC793, September, 1981.
	13	*/
	14
	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 */
	20	#define TCPS_SYN_RECEIVED 3 /* have send and received syn */
	21	/* states < TCPS_ESTABLISHED are those where connections not established */
	22	#define TCPS_ESTABLISHED 4 /* established */
	23	#define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */
	24	/* states > TCPS_CLOSE_WAIT are those where user has closed */
	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 2msl quiet wait after close /
	31
	32	#define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED)
	33	#define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT)
	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
	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.
	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,
	45	TH_FIN\|TH_ACK, TH_FIN\|TH_ACK, TH_FIN\|TH_ACK, TH_ACK, TH_ACK,
	46	};
	47	#endif
	48
	49	#ifdef KPROF
	50	int tcp_acounts[TCP_NSTATES][PRU_NREQ];
	51	#endif
	52
	53	#ifdef TCPSTATES
	54	char *tcpstates[] = {
	55	"CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD",
	56	"ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING",
	57	"LAST_ACK", "FIN_WAIT_2", "TIME_WAIT",
	58	};
	59	#endif