fbbd9655e5
Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
114 lines
4.2 KiB
C
114 lines
4.2 KiB
C
/*-
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)tcp_fsm.h 8.1 (Berkeley) 6/10/93
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* $FreeBSD$
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*/
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#ifndef _NETINET_TCP_FSM_H_
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#define _NETINET_TCP_FSM_H_
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/*
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* TCP FSM state definitions.
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*
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* Per RFC793, September, 1981.
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*/
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#define TCP_NSTATES 11
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#define TCPS_CLOSED 0 /* closed */
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#define TCPS_LISTEN 1 /* listening for connection */
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#define TCPS_SYN_SENT 2 /* active, have sent syn */
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#define TCPS_SYN_RECEIVED 3 /* have sent and received syn */
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/* states < TCPS_ESTABLISHED are those where connections not established */
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#define TCPS_ESTABLISHED 4 /* established */
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#define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */
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/* states > TCPS_CLOSE_WAIT are those where user has closed */
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#define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */
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#define TCPS_CLOSING 7 /* closed xchd FIN; await FIN ACK */
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#define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */
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/* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
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#define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */
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#define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */
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/* for KAME src sync over BSD*'s */
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#define TCP6_NSTATES TCP_NSTATES
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#define TCP6S_CLOSED TCPS_CLOSED
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#define TCP6S_LISTEN TCPS_LISTEN
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#define TCP6S_SYN_SENT TCPS_SYN_SENT
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#define TCP6S_SYN_RECEIVED TCPS_SYN_RECEIVED
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#define TCP6S_ESTABLISHED TCPS_ESTABLISHED
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#define TCP6S_CLOSE_WAIT TCPS_CLOSE_WAIT
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#define TCP6S_FIN_WAIT_1 TCPS_FIN_WAIT_1
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#define TCP6S_CLOSING TCPS_CLOSING
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#define TCP6S_LAST_ACK TCPS_LAST_ACK
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#define TCP6S_FIN_WAIT_2 TCPS_FIN_WAIT_2
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#define TCP6S_TIME_WAIT TCPS_TIME_WAIT
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#define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED)
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#define TCPS_HAVEESTABLISHED(s) ((s) >= TCPS_ESTABLISHED)
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#define TCPS_HAVERCVDFIN(s) \
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((s) == TCPS_CLOSE_WAIT || ((s) >= TCPS_CLOSING && (s) != TCPS_FIN_WAIT_2))
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#ifdef TCPOUTFLAGS
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/*
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* Flags used when sending segments in tcp_output. Basic flags (TH_RST,
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* TH_ACK,TH_SYN,TH_FIN) are totally determined by state, with the proviso
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* that TH_FIN is sent only if all data queued for output is included in the
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* segment.
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*/
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static u_char tcp_outflags[TCP_NSTATES] = {
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TH_RST|TH_ACK, /* 0, CLOSED */
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0, /* 1, LISTEN */
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TH_SYN, /* 2, SYN_SENT */
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TH_SYN|TH_ACK, /* 3, SYN_RECEIVED */
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TH_ACK, /* 4, ESTABLISHED */
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TH_ACK, /* 5, CLOSE_WAIT */
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TH_FIN|TH_ACK, /* 6, FIN_WAIT_1 */
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TH_FIN|TH_ACK, /* 7, CLOSING */
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TH_FIN|TH_ACK, /* 8, LAST_ACK */
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TH_ACK, /* 9, FIN_WAIT_2 */
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TH_ACK, /* 10, TIME_WAIT */
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};
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#endif
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#ifdef KPROF
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int tcp_acounts[TCP_NSTATES][PRU_NREQ];
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#endif
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#ifdef TCPSTATES
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static char const * const tcpstates[] = {
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"CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD",
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"ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING",
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"LAST_ACK", "FIN_WAIT_2", "TIME_WAIT",
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};
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#endif
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#endif
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