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/*
* 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.
* 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
* $FreeBSD$
*/
#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
const char *tcpstates[] = {
"CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD",
"ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING",
"LAST_ACK", "FIN_WAIT_2", "TIME_WAIT",
};
#endif
#endif
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