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//==========================================================================

//

//      include/netinet/tcp_fsm.h

//

//==========================================================================

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//

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//

// Portions of this software may have been derived from OpenBSD, 

// FreeBSD or other sources, and are covered by the appropriate

// copyright disclaimers included herein.

//

// Portions created by Red Hat are

// Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.

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//####BSDCOPYRIGHTEND####

//==========================================================================

/*

 * Copyright (c) 1982, 1986, 1993

 *      The 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.

 *

 *      @(#)tcp_fsm.h   8.1 (Berkeley) 6/10/93

 * $FreeBSD: src/sys/netinet/tcp_fsm.h,v 1.14 1999/11/07 04:18:30 jlemon Exp $

 */

#ifndef _NETINET_TCP_FSM_H_

#define _NETINET_TCP_FSM_H_

/*

 * 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 */

/* for KAME src sync over BSD*'s */

#define TCP6_NSTATES            TCP_NSTATES

#define TCP6S_CLOSED            TCPS_CLOSED

#define TCP6S_LISTEN            TCPS_LISTEN

#define TCP6S_SYN_SENT          TCPS_SYN_SENT

#define TCP6S_SYN_RECEIVED      TCPS_SYN_RECEIVED

#define TCP6S_ESTABLISHED       TCPS_ESTABLISHED

#define TCP6S_CLOSE_WAIT        TCPS_CLOSE_WAIT

#define TCP6S_FIN_WAIT_1        TCPS_FIN_WAIT_1

#define TCP6S_CLOSING           TCPS_CLOSING

#define TCP6S_LAST_ACK          TCPS_LAST_ACK

#define TCP6S_FIN_WAIT_2        TCPS_FIN_WAIT_2

#define TCP6S_TIME_WAIT         TCPS_TIME_WAIT

#define TCPS_HAVERCVDSYN(s)     ((s) >= TCPS_SYN_RECEIVED)

#define TCPS_HAVEESTABLISHED(s) ((s) >= TCPS_ESTABLISHED)

#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.

 */

static u_char   tcp_outflags[TCP_NSTATES] = {

        TH_RST|TH_ACK,          /* 0, CLOSED */

        0,                       /* 1, LISTEN */

        TH_SYN,                 /* 2, SYN_SENT */

        TH_SYN|TH_ACK,          /* 3, SYN_RECEIVED */

        TH_ACK,                 /* 4, ESTABLISHED */

        TH_ACK,                 /* 5, CLOSE_WAIT */

        TH_FIN|TH_ACK,          /* 6, FIN_WAIT_1 */

        TH_FIN|TH_ACK,          /* 7, CLOSING */

        TH_FIN|TH_ACK,          /* 8, LAST_ACK */

        TH_ACK,                 /* 9, FIN_WAIT_2 */

        TH_ACK,                 /* 10, TIME_WAIT */

};

#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

#endif