workbench/network/stacks/AROSTCP/bsdsocket/netinet/tcp_fsm.h

   1 /*
   2  * Copyright (c) 1982, 1986, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)tcp_fsm.h   8.1 (Berkeley) 6/10/93
  34  * $Id$
  35  */
  36
  37 #ifndef _NETINET_TCP_FSM_H_
  38 #define _NETINET_TCP_FSM_H_
  39
  40 /*
  41  * TCP FSM state definitions.
  42  * Per RFC793, September, 1981.
  43  */
  44
  45 #define TCP_NSTATES     11
  46
  47 #define TCPS_CLOSED             0       /* closed */
  48 #define TCPS_LISTEN             1       /* listening for connection */
  49 #define TCPS_SYN_SENT           2       /* active, have sent syn */
  50 #define TCPS_SYN_RECEIVED       3       /* have send and received syn */
  51 /* states < TCPS_ESTABLISHED are those where connections not established */
  52 #define TCPS_ESTABLISHED        4       /* established */
  53 #define TCPS_CLOSE_WAIT         5       /* rcvd fin, waiting for close */
  54 /* states > TCPS_CLOSE_WAIT are those where user has closed */
  55 #define TCPS_FIN_WAIT_1         6       /* have closed, sent fin */
  56 #define TCPS_CLOSING            7       /* closed xchd FIN; await FIN ACK */
  57 #define TCPS_LAST_ACK           8       /* had fin and close; await FIN ACK */
  58 /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
  59 #define TCPS_FIN_WAIT_2         9       /* have closed, fin is acked */
  60 #define TCPS_TIME_WAIT          10      /* in 2*msl quiet wait after close */
  61
  62 #define TCPS_HAVERCVDSYN(s)     ((s) >= TCPS_SYN_RECEIVED)
  63 #define TCPS_HAVEESTABLISHED(s) ((s) >= TCPS_ESTABLISHED)
  64 #define TCPS_HAVERCVDFIN(s)     ((s) >= TCPS_TIME_WAIT)
  65
  66 #ifdef  TCPOUTFLAGS
  67 /*
  68  * Flags used when sending segments in tcp_output.
  69  * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally
  70  * determined by state, with the proviso that TH_FIN is sent only
  71  * if all data queued for output is included in the segment.
  72  */
  73 u_char  tcp_outflags[TCP_NSTATES] = {
  74     TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK,
  75     TH_ACK, TH_ACK,
  76     TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK,
  77 };
  78 #endif
  79
  80 #ifdef KPROF
  81 int     tcp_acounts[TCP_NSTATES][PRU_NREQ];
  82 #endif
  83
  84 #ifdef  TCPSTATES
  85 char *tcpstates[] = {
  86         "CLOSED",       "LISTEN",       "SYN_SENT",     "SYN_RCVD",
  87         "ESTABLISHED",  "CLOSE_WAIT",   "FIN_WAIT_1",   "CLOSING",
  88         "LAST_ACK",     "FIN_WAIT_2",   "TIME_WAIT",
  89 };
  90 #endif
  91
  92 #endif