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tcp_fsm.h revision 1.5
      1  1.5      cgd /*	$NetBSD: tcp_fsm.h,v 1.5 1994/06/29 06:38:39 cgd Exp $	*/
      2  1.5      cgd 
      3  1.1      cgd /*
      4  1.4  mycroft  * Copyright (c) 1982, 1986, 1993
      5  1.4  mycroft  *	The Regents of the University of California.  All rights reserved.
      6  1.1      cgd  *
      7  1.1      cgd  * Redistribution and use in source and binary forms, with or without
      8  1.1      cgd  * modification, are permitted provided that the following conditions
      9  1.1      cgd  * are met:
     10  1.1      cgd  * 1. Redistributions of source code must retain the above copyright
     11  1.1      cgd  *    notice, this list of conditions and the following disclaimer.
     12  1.1      cgd  * 2. Redistributions in binary form must reproduce the above copyright
     13  1.1      cgd  *    notice, this list of conditions and the following disclaimer in the
     14  1.1      cgd  *    documentation and/or other materials provided with the distribution.
     15  1.1      cgd  * 3. All advertising materials mentioning features or use of this software
     16  1.1      cgd  *    must display the following acknowledgement:
     17  1.1      cgd  *	This product includes software developed by the University of
     18  1.1      cgd  *	California, Berkeley and its contributors.
     19  1.1      cgd  * 4. Neither the name of the University nor the names of its contributors
     20  1.1      cgd  *    may be used to endorse or promote products derived from this software
     21  1.1      cgd  *    without specific prior written permission.
     22  1.1      cgd  *
     23  1.1      cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  1.1      cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  1.1      cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  1.1      cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  1.1      cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  1.1      cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  1.1      cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  1.1      cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  1.1      cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  1.1      cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  1.1      cgd  * SUCH DAMAGE.
     34  1.1      cgd  *
     35  1.5      cgd  *	@(#)tcp_fsm.h	8.1 (Berkeley) 6/10/93
     36  1.1      cgd  */
     37  1.1      cgd 
     38  1.1      cgd /*
     39  1.1      cgd  * TCP FSM state definitions.
     40  1.1      cgd  * Per RFC793, September, 1981.
     41  1.1      cgd  */
     42  1.1      cgd 
     43  1.1      cgd #define	TCP_NSTATES	11
     44  1.1      cgd 
     45  1.1      cgd #define	TCPS_CLOSED		0	/* closed */
     46  1.1      cgd #define	TCPS_LISTEN		1	/* listening for connection */
     47  1.1      cgd #define	TCPS_SYN_SENT		2	/* active, have sent syn */
     48  1.1      cgd #define	TCPS_SYN_RECEIVED	3	/* have send and received syn */
     49  1.1      cgd /* states < TCPS_ESTABLISHED are those where connections not established */
     50  1.1      cgd #define	TCPS_ESTABLISHED	4	/* established */
     51  1.1      cgd #define	TCPS_CLOSE_WAIT		5	/* rcvd fin, waiting for close */
     52  1.1      cgd /* states > TCPS_CLOSE_WAIT are those where user has closed */
     53  1.1      cgd #define	TCPS_FIN_WAIT_1		6	/* have closed, sent fin */
     54  1.1      cgd #define	TCPS_CLOSING		7	/* closed xchd FIN; await FIN ACK */
     55  1.1      cgd #define	TCPS_LAST_ACK		8	/* had fin and close; await FIN ACK */
     56  1.1      cgd /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
     57  1.1      cgd #define	TCPS_FIN_WAIT_2		9	/* have closed, fin is acked */
     58  1.1      cgd #define	TCPS_TIME_WAIT		10	/* in 2*msl quiet wait after close */
     59  1.1      cgd 
     60  1.1      cgd #define	TCPS_HAVERCVDSYN(s)	((s) >= TCPS_SYN_RECEIVED)
     61  1.1      cgd #define	TCPS_HAVERCVDFIN(s)	((s) >= TCPS_TIME_WAIT)
     62  1.1      cgd 
     63  1.1      cgd #ifdef	TCPOUTFLAGS
     64  1.1      cgd /*
     65  1.1      cgd  * Flags used when sending segments in tcp_output.
     66  1.1      cgd  * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally
     67  1.1      cgd  * determined by state, with the proviso that TH_FIN is sent only
     68  1.1      cgd  * if all data queued for output is included in the segment.
     69  1.1      cgd  */
     70  1.1      cgd u_char	tcp_outflags[TCP_NSTATES] = {
     71  1.1      cgd     TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK,
     72  1.1      cgd     TH_ACK, TH_ACK,
     73  1.1      cgd     TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK,
     74  1.1      cgd };
     75  1.1      cgd #endif
     76  1.1      cgd 
     77  1.1      cgd #ifdef KPROF
     78  1.1      cgd int	tcp_acounts[TCP_NSTATES][PRU_NREQ];
     79  1.1      cgd #endif
     80  1.1      cgd 
     81  1.1      cgd #ifdef	TCPSTATES
     82  1.1      cgd char *tcpstates[] = {
     83  1.1      cgd 	"CLOSED",	"LISTEN",	"SYN_SENT",	"SYN_RCVD",
     84  1.1      cgd 	"ESTABLISHED",	"CLOSE_WAIT",	"FIN_WAIT_1",	"CLOSING",
     85  1.1      cgd 	"LAST_ACK",	"FIN_WAIT_2",	"TIME_WAIT",
     86  1.1      cgd };
     87  1.1      cgd #endif
     88