[unix-history] / 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, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	from: @(#)tcp_fsm.h	7.4 (Berkeley) 6/28/90
 *	$Id: tcp_fsm.h,v 1.2 1993/10/16 18:26:24 rgrimes Exp $
 */

#ifndef _NETINET_TCP_FSM_H_
#define _NETINET_TCP_FSM_H_ 1

/*
 * 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
extern 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
#endif /* _NETINET_TCP_FSM_H_ */
Commit	Line	Data
15637ed4 RG	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, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*
38e82238	33	* from: @(#)tcp_fsm.h 7.4 (Berkeley) 6/28/90
8ace4366	34	* $Id: tcp_fsm.h,v 1.2 1993/10/16 18:26:24 rgrimes Exp $
15637ed4 RG	35	*/
15637ed4 RG	36
8ace4366 GW	37	#ifndef _NETINET_TCP_FSM_H_
	38	#define _NETINET_TCP_FSM_H_ 1
	39
15637ed4 RG	40	/*
	41	* TCP FSM state definitions.
	42	* Per RFC793, September, 1981.
	43	*/
	44
	45	#define TCP_NSTATES 11
	46
	47	#define TCPS_CLOSED 0 /* closed */
	48	#define TCPS_LISTEN 1 /* listening for connection */
	49	#define TCPS_SYN_SENT 2 /* active, have sent syn */
	50	#define TCPS_SYN_RECEIVED 3 /* have send and received syn */
	51	/* states < TCPS_ESTABLISHED are those where connections not established */
	52	#define TCPS_ESTABLISHED 4 /* established */
	53	#define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */
	54	/* states > TCPS_CLOSE_WAIT are those where user has closed */
	55	#define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */
	56	#define TCPS_CLOSING 7 /* closed xchd FIN; await FIN ACK */
	57	#define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */
	58	/* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
	59	#define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */
	60	#define TCPS_TIME_WAIT 10 /* in 2msl quiet wait after close /
	61
	62	#define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED)
	63	#define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT)
	64
	65	#ifdef TCPOUTFLAGS
	66	/*
	67	* Flags used when sending segments in tcp_output.
	68	* Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally
	69	* determined by state, with the proviso that TH_FIN is sent only
	70	* if all data queued for output is included in the segment.
	71	*/
	72	u_char tcp_outflags[TCP_NSTATES] = {
	73	TH_RST\|TH_ACK, 0, TH_SYN, TH_SYN\|TH_ACK,
	74	TH_ACK, TH_ACK,
	75	TH_FIN\|TH_ACK, TH_FIN\|TH_ACK, TH_FIN\|TH_ACK, TH_ACK, TH_ACK,
	76	};
	77	#endif
	78
	79	#ifdef KPROF
8ace4366	80	extern int tcp_acounts[TCP_NSTATES][PRU_NREQ];
15637ed4 RG	81	#endif
	82
	83	#ifdef TCPSTATES
	84	char *tcpstates[] = {
	85	"CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD",
	86	"ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING",
	87	"LAST_ACK", "FIN_WAIT_2", "TIME_WAIT",
	88	};
	89	#endif
8ace4366	90	#endif /* _NETINET_TCP_FSM_H_ */