/*
 * 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
 * $FreeBSD: src/sys/netinet/tcp_fsm.h,v 1.14 1999/11/07 04:18:30 jlemon Exp $
 * $DragonFly: src/sys/netinet/tcp_fsm.h,v 1.5 2004/09/22 08:54:27 joerg Exp $
 */

#ifndef _NETINET_TCP_FSM_H_
#define _NETINET_TCP_FSM_H_

/*
 * TCP FSM state definitions.
 * Per RFC793, September, 1981.
 */

#define TCP_NSTATES     12

#define TCPS_TERMINATING        0
#define TCPS_CLOSED             1       /* closed */
#define TCPS_LISTEN             2       /* listening for connection */
#define TCPS_SYN_SENT           3       /* active, have sent syn */
#define TCPS_SYN_RECEIVED       4       /* have send and received syn */
/* states < TCPS_ESTABLISHED are those where connections not established */
#define TCPS_ESTABLISHED        5       /* established */
#define TCPS_CLOSE_WAIT         6       /* rcvd fin, waiting for close */
/* states > TCPS_CLOSE_WAIT are those where user has closed */
#define TCPS_FIN_WAIT_1         7       /* have closed, sent fin */
#define TCPS_CLOSING            8       /* closed xchd FIN; await FIN ACK */
#define TCPS_LAST_ACK           9       /* had fin and close; await FIN ACK */
/* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
#define TCPS_FIN_WAIT_2         10      /* have closed, fin is acked */
#define TCPS_TIME_WAIT          11      /* 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, TERMINATING */
        TH_RST|TH_ACK,          /* 1, CLOSED */
        0,                      /* 2, LISTEN */
        TH_SYN,                 /* 3, SYN_SENT */
        TH_SYN|TH_ACK,          /* 4, SYN_RECEIVED */
        TH_ACK,                 /* 5, ESTABLISHED */
        TH_ACK,                 /* 6, CLOSE_WAIT */
        TH_FIN|TH_ACK,          /* 7, FIN_WAIT_1 */
        TH_FIN|TH_ACK,          /* 8, CLOSING */
        TH_FIN|TH_ACK,          /* 9, LAST_ACK */
        TH_ACK,                 /* 10, FIN_WAIT_2 */
        TH_ACK,                 /* 11, TIME_WAIT */
};      
#endif

#ifdef KPROF
int     tcp_acounts[TCP_NSTATES][PRU_NREQ];
#endif

#ifdef  TCPSTATES
const char *tcpstates[] = {
        "TERMINATING",
        "CLOSED",       "LISTEN",       "SYN_SENT",     "SYN_RCVD",
        "ESTABLISHED",  "CLOSE_WAIT",   "FIN_WAIT_1",   "CLOSING",
        "LAST_ACK",     "FIN_WAIT_2",   "TIME_WAIT",
};
#endif

#endif