bsd/netinet/tcp_fsm.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * Copyright (c) 1982, 1986, 1993
  24  *      The Regents of the University of California.  All rights reserved.
  25  *
  26  * Redistribution and use in source and binary forms, with or without
  27  * modification, are permitted provided that the following conditions
  28  * are met:
  29  * 1. Redistributions of source code must retain the above copyright
  30  *    notice, this list of conditions and the following disclaimer.
  31  * 2. Redistributions in binary form must reproduce the above copyright
  32  *    notice, this list of conditions and the following disclaimer in the
  33  *    documentation and/or other materials provided with the distribution.
  34  * 3. All advertising materials mentioning features or use of this software
  35  *    must display the following acknowledgement:
  36  *      This product includes software developed by the University of
  37  *      California, Berkeley and its contributors.
  38  * 4. Neither the name of the University nor the names of its contributors
  39  *    may be used to endorse or promote products derived from this software
  40  *    without specific prior written permission.
  41  *
  42  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  43  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  44  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  45  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  46  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  47  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  48  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  49  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  50  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  51  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  52  * SUCH DAMAGE.
  53  *
  54  *      @(#)tcp_fsm.h   8.1 (Berkeley) 6/10/93
  55  */
  56
  57 #ifndef _NETINET_TCP_FSM_H_
  58 #define _NETINET_TCP_FSM_H_
  59
  60 /*
  61  * TCP FSM state definitions.
  62  * Per RFC793, September, 1981.
  63  */
  64
  65 #define TCP_NSTATES     11
  66
  67 #define TCPS_CLOSED             0       /* closed */
  68 #define TCPS_LISTEN             1       /* listening for connection */
  69 #define TCPS_SYN_SENT           2       /* active, have sent syn */
  70 #define TCPS_SYN_RECEIVED       3       /* have send and received syn */
  71 /* states < TCPS_ESTABLISHED are those where connections not established */
  72 #define TCPS_ESTABLISHED        4       /* established */
  73 #define TCPS_CLOSE_WAIT         5       /* rcvd fin, waiting for close */
  74 /* states > TCPS_CLOSE_WAIT are those where user has closed */
  75 #define TCPS_FIN_WAIT_1         6       /* have closed, sent fin */
  76 #define TCPS_CLOSING            7       /* closed xchd FIN; await FIN ACK */
  77 #define TCPS_LAST_ACK           8       /* had fin and close; await FIN ACK */
  78 /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
  79 #define TCPS_FIN_WAIT_2         9       /* have closed, fin is acked */
  80 #define TCPS_TIME_WAIT          10      /* in 2*msl quiet wait after close */
  81
  82 /* for KAME src sync over BSD*'s */
  83 #define TCP6_NSTATES            TCP_NSTATES
  84 #define TCP6S_CLOSED            TCPS_CLOSED
  85 #define TCP6S_LISTEN            TCPS_LISTEN
  86 #define TCP6S_SYN_SENT          TCPS_SYN_SENT
  87 #define TCP6S_SYN_RECEIVED      TCPS_SYN_RECEIVED
  88 #define TCP6S_ESTABLISHED       TCPS_ESTABLISHED
  89 #define TCP6S_CLOSE_WAIT        TCPS_CLOSE_WAIT
  90 #define TCP6S_FIN_WAIT_1        TCPS_FIN_WAIT_1
  91 #define TCP6S_CLOSING           TCPS_CLOSING
  92 #define TCP6S_LAST_ACK          TCPS_LAST_ACK
  93 #define TCP6S_FIN_WAIT_2        TCPS_FIN_WAIT_2
  94 #define TCP6S_TIME_WAIT         TCPS_TIME_WAIT
  95
  96 #define TCPS_HAVERCVDSYN(s)     ((s) >= TCPS_SYN_RECEIVED)
  97 #define TCPS_HAVEESTABLISHED(s) ((s) >= TCPS_ESTABLISHED)
  98 #define TCPS_HAVERCVDFIN(s)     ((s) >= TCPS_TIME_WAIT)
  99
 100 #ifdef TCPOUTFLAGS
 101 /*
 102  * Flags used when sending segments in tcp_output.
 103  * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally
 104  * determined by state, with the proviso that TH_FIN is sent only
 105  * if all data queued for output is included in the segment.
 106  */
 107 static u_char   tcp_outflags[TCP_NSTATES] = {
 108         TH_RST|TH_ACK,          /* 0, CLOSED */
 109         0,                      /* 1, LISTEN */
 110         TH_SYN,                 /* 2, SYN_SENT */
 111         TH_SYN|TH_ACK,          /* 3, SYN_RECEIVED */
 112         TH_ACK,                 /* 4, ESTABLISHED */
 113         TH_ACK,                 /* 5, CLOSE_WAIT */
 114         TH_FIN|TH_ACK,          /* 6, FIN_WAIT_1 */
 115         TH_FIN|TH_ACK,          /* 7, CLOSING */
 116         TH_FIN|TH_ACK,          /* 8, LAST_ACK */
 117         TH_ACK,                 /* 9, FIN_WAIT_2 */
 118         TH_ACK,                 /* 10, TIME_WAIT */
 119 };
 120 #endif
 121
 122 #if KPROF
 123 int     tcp_acounts[TCP_NSTATES][PRU_NREQ];
 124 #endif
 125
 126 #ifdef  TCPSTATES
 127 char *tcpstates[] = {
 128         "CLOSED",       "LISTEN",       "SYN_SENT",     "SYN_RCVD",
 129         "ESTABLISHED",  "CLOSE_WAIT",   "FIN_WAIT_1",   "CLOSING",
 130         "LAST_ACK",     "FIN_WAIT_2",   "TIME_WAIT",
 131 };
 132 #endif
 133
 134 #endif