LCOM1920-T02G10

/*        $NetBSD: tcp_fsm.h,v 1.15 2005/12/10 23:36:23 elad Exp $        */

/*

 * 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. 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

 */

#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 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_HAVEESTABLISHED(s)        ((s) >= TCPS_ESTABLISHED)

#define        TCPS_HAVERCVDFIN(s) \

    ((s) == TCPS_CLOSE_WAIT || ((s) >= TCPS_CLOSING && (s) != TCPS_FIN_WAIT_2))

#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.

 */

const u_char        tcp_outflags[TCP_NSTATES] = {

        TH_RST|TH_ACK,        /* CLOSED */

        0,                /* LISTEN */

        TH_SYN,                /* SYN_SENT */

        TH_SYN|TH_ACK,        /* SYN_RCVD */

        TH_ACK,                /* ESTABLISHED */

        TH_ACK,                /* CLOSE_WAIT */

        TH_FIN|TH_ACK,        /* FIN_WAIT_1 */

        TH_FIN|TH_ACK,        /* CLOSING */

        TH_FIN|TH_ACK,        /* LAST_ACK */

        TH_ACK,                /* FIN_WAIT_2 */

        TH_ACK,                /* TIME_WAIT */

};

#endif

#ifdef KPROF

int        tcp_acounts[TCP_NSTATES][PRU_NREQ];

#endif

#ifdef        TCPSTATES

const char * const tcpstates[] = {

        "CLOSED",        "LISTEN",        "SYN_SENT",        "SYN_RCVD",

        "ESTABLISHED",        "CLOSE_WAIT",        "FIN_WAIT_1",        "CLOSING",

        "LAST_ACK",        "FIN_WAIT_2",        "TIME_WAIT",

};

#elif defined(_KERNEL)

extern const char * const tcpstates[];

#endif

#endif /* !_NETINET_TCP_FSM_H_ */