Home | History | Annotate | Line # | Download | only in netinet
tcp_fsm.h revision 1.16
      1  1.16     maxv /*	$NetBSD: tcp_fsm.h,v 1.16 2018/04/07 13:48:50 maxv 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  1.12      agc  * 3. Neither the name of the University nor the names of its contributors
     16   1.1      cgd  *    may be used to endorse or promote products derived from this software
     17   1.1      cgd  *    without specific prior written permission.
     18   1.1      cgd  *
     19   1.1      cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20   1.1      cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21   1.1      cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22   1.1      cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23   1.1      cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24   1.1      cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25   1.1      cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26   1.1      cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27   1.1      cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28   1.1      cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29   1.1      cgd  * SUCH DAMAGE.
     30   1.1      cgd  *
     31   1.5      cgd  *	@(#)tcp_fsm.h	8.1 (Berkeley) 6/10/93
     32   1.1      cgd  */
     33   1.1      cgd 
     34   1.8    perry #ifndef _NETINET_TCP_FSM_H_
     35   1.8    perry #define _NETINET_TCP_FSM_H_
     36   1.8    perry 
     37   1.1      cgd /*
     38   1.1      cgd  * TCP FSM state definitions.
     39   1.1      cgd  * Per RFC793, September, 1981.
     40   1.1      cgd  */
     41   1.1      cgd 
     42   1.1      cgd #define	TCP_NSTATES	11
     43   1.1      cgd 
     44   1.1      cgd #define	TCPS_CLOSED		0	/* closed */
     45   1.1      cgd #define	TCPS_LISTEN		1	/* listening for connection */
     46   1.1      cgd #define	TCPS_SYN_SENT		2	/* active, have sent syn */
     47   1.1      cgd #define	TCPS_SYN_RECEIVED	3	/* have send and received syn */
     48   1.1      cgd /* states < TCPS_ESTABLISHED are those where connections not established */
     49   1.1      cgd #define	TCPS_ESTABLISHED	4	/* established */
     50   1.1      cgd #define	TCPS_CLOSE_WAIT		5	/* rcvd fin, waiting for close */
     51   1.1      cgd /* states > TCPS_CLOSE_WAIT are those where user has closed */
     52   1.1      cgd #define	TCPS_FIN_WAIT_1		6	/* have closed, sent fin */
     53   1.7   kleink #define	TCPS_CLOSING		7	/* closed xchd FIN; await ACK */
     54   1.1      cgd #define	TCPS_LAST_ACK		8	/* had fin and close; await FIN ACK */
     55   1.1      cgd /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
     56   1.1      cgd #define	TCPS_FIN_WAIT_2		9	/* have closed, fin is acked */
     57   1.1      cgd #define	TCPS_TIME_WAIT		10	/* in 2*msl quiet wait after close */
     58   1.1      cgd 
     59   1.1      cgd #define	TCPS_HAVERCVDSYN(s)	((s) >= TCPS_SYN_RECEIVED)
     60   1.6  mycroft #define	TCPS_HAVEESTABLISHED(s)	((s) >= TCPS_ESTABLISHED)
     61   1.9  thorpej #define	TCPS_HAVERCVDFIN(s) \
     62   1.9  thorpej     ((s) == TCPS_CLOSE_WAIT || ((s) >= TCPS_CLOSING && (s) != TCPS_FIN_WAIT_2))
     63   1.1      cgd 
     64   1.1      cgd #ifdef	TCPOUTFLAGS
     65   1.1      cgd /*
     66   1.1      cgd  * Flags used when sending segments in tcp_output.
     67   1.1      cgd  * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally
     68   1.1      cgd  * determined by state, with the proviso that TH_FIN is sent only
     69   1.1      cgd  * if all data queued for output is included in the segment.
     70   1.1      cgd  */
     71  1.11     matt const u_char	tcp_outflags[TCP_NSTATES] = {
     72  1.13     yamt 	TH_RST|TH_ACK,	/* CLOSED */
     73  1.13     yamt 	0,		/* LISTEN */
     74  1.13     yamt 	TH_SYN,		/* SYN_SENT */
     75  1.13     yamt 	TH_SYN|TH_ACK,	/* SYN_RCVD */
     76  1.13     yamt 	TH_ACK,		/* ESTABLISHED */
     77  1.13     yamt 	TH_ACK,		/* CLOSE_WAIT */
     78  1.13     yamt 	TH_FIN|TH_ACK,	/* FIN_WAIT_1 */
     79  1.13     yamt 	TH_FIN|TH_ACK,	/* CLOSING */
     80  1.13     yamt 	TH_FIN|TH_ACK,	/* LAST_ACK */
     81  1.13     yamt 	TH_ACK,		/* FIN_WAIT_2 */
     82  1.13     yamt 	TH_ACK,		/* TIME_WAIT */
     83   1.1      cgd };
     84   1.1      cgd #endif
     85   1.1      cgd 
     86   1.1      cgd #ifdef	TCPSTATES
     87  1.11     matt const char * const tcpstates[] = {
     88   1.1      cgd 	"CLOSED",	"LISTEN",	"SYN_SENT",	"SYN_RCVD",
     89   1.1      cgd 	"ESTABLISHED",	"CLOSE_WAIT",	"FIN_WAIT_1",	"CLOSING",
     90   1.1      cgd 	"LAST_ACK",	"FIN_WAIT_2",	"TIME_WAIT",
     91   1.1      cgd };
     92  1.14     matt #elif defined(_KERNEL)
     93  1.14     matt extern const char * const tcpstates[];
     94   1.1      cgd #endif
     95   1.8    perry 
     96  1.15     elad #endif /* !_NETINET_TCP_FSM_H_ */
     97