bsd/netinet/tcp_fsm.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Copyright (c) 1982, 1986, 1993
  27  *      The Regents of the University of California.  All rights reserved.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  * 1. Redistributions of source code must retain the above copyright
  33  *    notice, this list of conditions and the following disclaimer.
  34  * 2. Redistributions in binary form must reproduce the above copyright
  35  *    notice, this list of conditions and the following disclaimer in the
  36  *    documentation and/or other materials provided with the distribution.
  37  * 3. All advertising materials mentioning features or use of this software
  38  *    must display the following acknowledgement:
  39  *      This product includes software developed by the University of
  40  *      California, Berkeley and its contributors.
  41  * 4. Neither the name of the University nor the names of its contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  *
  57  *      @(#)tcp_fsm.h   8.1 (Berkeley) 6/10/93
  58  * $FreeBSD: src/sys/netinet/tcp_fsm.h,v 1.14 1999/11/07 04:18:30 jlemon Exp $
  59  */
  60
  61 #ifndef _NETINET_TCP_FSM_H_
  62 #define _NETINET_TCP_FSM_H_
  63 #include <sys/appleapiopts.h>
  64
  65 /*
  66  * TCP FSM state definitions.
  67  * Per RFC793, September, 1981.
  68  */
  69
  70 #define TCP_NSTATES     11
  71
  72 #define TCPS_CLOSED             0       /* closed */
  73 #define TCPS_LISTEN             1       /* listening for connection */
  74 #define TCPS_SYN_SENT           2       /* active, have sent syn */
  75 #define TCPS_SYN_RECEIVED       3       /* have send and received syn */
  76 /* states < TCPS_ESTABLISHED are those where connections not established */
  77 #define TCPS_ESTABLISHED        4       /* established */
  78 #define TCPS_CLOSE_WAIT         5       /* rcvd fin, waiting for close */
  79 /* states > TCPS_CLOSE_WAIT are those where user has closed */
  80 #define TCPS_FIN_WAIT_1         6       /* have closed, sent fin */
  81 #define TCPS_CLOSING            7       /* closed xchd FIN; await FIN ACK */
  82 #define TCPS_LAST_ACK           8       /* had fin and close; await FIN ACK */
  83 /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
  84 #define TCPS_FIN_WAIT_2         9       /* have closed, fin is acked */
  85 #define TCPS_TIME_WAIT          10      /* in 2*msl quiet wait after close */
  86
  87 /* for KAME src sync over BSD*'s */
  88 #define TCP6_NSTATES            TCP_NSTATES
  89 #define TCP6S_CLOSED            TCPS_CLOSED
  90 #define TCP6S_LISTEN            TCPS_LISTEN
  91 #define TCP6S_SYN_SENT          TCPS_SYN_SENT
  92 #define TCP6S_SYN_RECEIVED      TCPS_SYN_RECEIVED
  93 #define TCP6S_ESTABLISHED       TCPS_ESTABLISHED
  94 #define TCP6S_CLOSE_WAIT        TCPS_CLOSE_WAIT
  95 #define TCP6S_FIN_WAIT_1        TCPS_FIN_WAIT_1
  96 #define TCP6S_CLOSING           TCPS_CLOSING
  97 #define TCP6S_LAST_ACK          TCPS_LAST_ACK
  98 #define TCP6S_FIN_WAIT_2        TCPS_FIN_WAIT_2
  99 #define TCP6S_TIME_WAIT         TCPS_TIME_WAIT
 100
 101 #define TCPS_HAVERCVDSYN(s)     ((s) >= TCPS_SYN_RECEIVED)
 102 #define TCPS_HAVEESTABLISHED(s) ((s) >= TCPS_ESTABLISHED)
 103 #define TCPS_HAVERCVDFIN(s)     ((s) >= TCPS_TIME_WAIT)
 104
 105 #ifdef __APPLE_API_UNSTABLE
 106 #ifdef  TCPOUTFLAGS
 107 /*
 108  * Flags used when sending segments in tcp_output.
 109  * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally
 110  * determined by state, with the proviso that TH_FIN is sent only
 111  * if all data queued for output is included in the segment.
 112  */
 113 static u_char   tcp_outflags[TCP_NSTATES] = {
 114         TH_RST|TH_ACK,          /* 0, CLOSED */
 115         0,                      /* 1, LISTEN */
 116         TH_SYN,                 /* 2, SYN_SENT */
 117         TH_SYN|TH_ACK,          /* 3, SYN_RECEIVED */
 118         TH_ACK,                 /* 4, ESTABLISHED */
 119         TH_ACK,                 /* 5, CLOSE_WAIT */
 120         TH_FIN|TH_ACK,          /* 6, FIN_WAIT_1 */
 121         TH_FIN|TH_ACK,          /* 7, CLOSING */
 122         TH_FIN|TH_ACK,          /* 8, LAST_ACK */
 123         TH_ACK,                 /* 9, FIN_WAIT_2 */
 124         TH_ACK,                 /* 10, TIME_WAIT */
 125 };
 126 #endif
 127 #endif /* __APPLE_API_UNSTABLE */
 128
 129 #if KPROF
 130 #ifdef __APPLE_API_PRIVATE
 131 int     tcp_acounts[TCP_NSTATES][PRU_NREQ];
 132 #endif /* __APPLE_API_PRIVATE */
 133 #endif
 134
 135 #ifdef  TCPSTATES
 136 char *tcpstates[] = {
 137         "CLOSED",       "LISTEN",       "SYN_SENT",     "SYN_RCVD",
 138         "ESTABLISHED",  "CLOSE_WAIT",   "FIN_WAIT_1",   "CLOSING",
 139         "LAST_ACK",     "FIN_WAIT_2",   "TIME_WAIT",
 140 };
 141 #endif
 142
 143 #endif