usr/src/sys/netinet/tcp_fsm.h

/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *	@(#)tcp_fsm.h	7.3 (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	* Redistribution and use in source and binary forms are permitted
	6	* provided that the above copyright notice and this paragraph are
	7	* duplicated in all such forms and that any documentation,
	8	* advertising materials, and other materials related to such
	9	* distribution and use acknowledge that the software was developed
	10	* by the University of California, Berkeley. The name of the
	11	* University may not be used to endorse or promote products derived
	12	* from this software without specific prior written permission.
	13	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
	14	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
	15	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
	16	*
	17	* @(#)tcp_fsm.h 7.3 (Berkeley) %G%
	18	*/
	19
	20	/*
	21	* TCP FSM state definitions.
	22	* Per RFC793, September, 1981.
	23	*/
	24
	25	#define TCP_NSTATES 11
	26
	27	#define TCPS_CLOSED 0 /* closed */
	28	#define TCPS_LISTEN 1 /* listening for connection */
	29	#define TCPS_SYN_SENT 2 /* active, have sent syn */
	30	#define TCPS_SYN_RECEIVED 3 /* have send and received syn */
	31	/* states < TCPS_ESTABLISHED are those where connections not established */
	32	#define TCPS_ESTABLISHED 4 /* established */
	33	#define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */
	34	/* states > TCPS_CLOSE_WAIT are those where user has closed */
	35	#define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */
	36	#define TCPS_CLOSING 7 /* closed xchd FIN; await FIN ACK */
	37	#define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */
	38	/* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
	39	#define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */
	40	#define TCPS_TIME_WAIT 10 /* in 2msl quiet wait after close /
	41
	42	#define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED)
	43	#define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT)
	44
	45	#ifdef TCPOUTFLAGS
	46	/*
	47	* Flags used when sending segments in tcp_output.
	48	* Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally
	49	* determined by state, with the proviso that TH_FIN is sent only
	50	* if all data queued for output is included in the segment.
	51	*/
	52	u_char tcp_outflags[TCP_NSTATES] = {
	53	TH_RST\|TH_ACK, 0, TH_SYN, TH_SYN\|TH_ACK,
	54	TH_ACK, TH_ACK,
	55	TH_FIN\|TH_ACK, TH_FIN\|TH_ACK, TH_FIN\|TH_ACK, TH_ACK, TH_ACK,
	56	};
	57	#endif
	58
	59	#ifdef KPROF
	60	int tcp_acounts[TCP_NSTATES][PRU_NREQ];
	61	#endif
	62
	63	#ifdef TCPSTATES
	64	char *tcpstates[] = {
	65	"CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD",
	66	"ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING",
	67	"LAST_ACK", "FIN_WAIT_2", "TIME_WAIT",
	68	};
	69	#endif