Home | History | Annotate | Line # | Download | only in netinet
tcp_fsm.h revision 1.10 
      1 /*	$NetBSD: tcp_fsm.h,v 1.10 1998/07/09 05:49:56 mycroft Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1982, 1986, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  *
     35  *	@(#)tcp_fsm.h	8.1 (Berkeley) 6/10/93
     36  */
     37 
     38 #ifndef _NETINET_TCP_FSM_H_
     39 #define _NETINET_TCP_FSM_H_
     40 
     41 /*
     42  * TCP FSM state definitions.
     43  * Per RFC793, September, 1981.
     44  */
     45 
     46 #define	TCP_NSTATES	11
     47 
     48 #define	TCPS_CLOSED		0	/* closed */
     49 #define	TCPS_LISTEN		1	/* listening for connection */
     50 #define	TCPS_SYN_SENT		2	/* active, have sent syn */
     51 #define	TCPS_SYN_RECEIVED	3	/* have send and received syn */
     52 /* states < TCPS_ESTABLISHED are those where connections not established */
     53 #define	TCPS_ESTABLISHED	4	/* established */
     54 #define	TCPS_CLOSE_WAIT		5	/* rcvd fin, waiting for close */
     55 /* states > TCPS_CLOSE_WAIT are those where user has closed */
     56 #define	TCPS_FIN_WAIT_1		6	/* have closed, sent fin */
     57 #define	TCPS_CLOSING		7	/* closed xchd FIN; await ACK */
     58 #define	TCPS_LAST_ACK		8	/* had fin and close; await FIN ACK */
     59 /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
     60 #define	TCPS_FIN_WAIT_2		9	/* have closed, fin is acked */
     61 #define	TCPS_TIME_WAIT		10	/* in 2*msl quiet wait after close */
     62 
     63 #define	TCPS_HAVERCVDSYN(s)	((s) >= TCPS_SYN_RECEIVED)
     64 #define	TCPS_HAVEESTABLISHED(s)	((s) >= TCPS_ESTABLISHED)
     65 #define	TCPS_HAVERCVDFIN(s) \
     66     ((s) == TCPS_CLOSE_WAIT || ((s) >= TCPS_CLOSING && (s) != TCPS_FIN_WAIT_2))
     67 
     68 #ifdef	TCPOUTFLAGS
     69 /*
     70  * Flags used when sending segments in tcp_output.
     71  * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally
     72  * determined by state, with the proviso that TH_FIN is sent only
     73  * if all data queued for output is included in the segment.
     74  */
     75 u_char	tcp_outflags[TCP_NSTATES] = {
     76     TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK,
     77     TH_ACK, TH_ACK,
     78     TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK,
     79 };
     80 #endif
     81 
     82 #ifdef KPROF
     83 int	tcp_acounts[TCP_NSTATES][PRU_NREQ];
     84 #endif
     85 
     86 #ifdef	TCPSTATES
     87 char *tcpstates[] = {
     88 	"CLOSED",	"LISTEN",	"SYN_SENT",	"SYN_RCVD",
     89 	"ESTABLISHED",	"CLOSE_WAIT",	"FIN_WAIT_1",	"CLOSING",
     90 	"LAST_ACK",	"FIN_WAIT_2",	"TIME_WAIT",
     91 };
     92 #endif
     93 
     94 #endif /* _NETINET_TCP_FSM_H_ */
     95