bsd/netiso/esis.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) 1991, 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  *      @(#)esis.h      8.1 (Berkeley) 6/10/93
  55  */
  56
  57 /***********************************************************
  58                 Copyright IBM Corporation 1987
  59
  60                       All Rights Reserved
  61
  62 Permission to use, copy, modify, and distribute this software and its
  63 documentation for any purpose and without fee is hereby granted,
  64 provided that the above copyright notice appear in all copies and that
  65 both that copyright notice and this permission notice appear in
  66 supporting documentation, and that the name of IBM not be
  67 used in advertising or publicity pertaining to distribution of the
  68 software without specific, written prior permission.
  69
  70 IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
  71 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
  72 IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
  73 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  74 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
  75 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  76 SOFTWARE.
  77
  78 ******************************************************************/
  79
  80 /*
  81  * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison
  82  */
  83
  84 #ifndef BYTE_ORDER
  85 /*
  86  * Definitions for byte order,
  87  * according to byte significance from low address to high.
  88  */
  89 #define LITTLE_ENDIAN   1234    /* least-significant byte first (vax) */
  90 #define BIG_ENDIAN      4321    /* most-significant byte first (IBM, net) */
  91 #define PDP_ENDIAN      3412    /* LSB first in word, MSW first in long (pdp) */
  92
  93 #ifdef vax
  94 #define BYTE_ORDER      LITTLE_ENDIAN
  95 #else
  96 #define BYTE_ORDER      BIG_ENDIAN      /* mc68000, tahoe, most others */
  97 #endif
  98 #endif /* BYTE_ORDER */
  99
 100 #define SNPAC_AGE               60                      /* seconds */
 101 #define ESIS_CONFIG             60                      /* seconds */
 102 #define ESIS_HT                 (ESIS_CONFIG * 2)
 103
 104 /*
 105  *      Fixed part of an ESIS header
 106  */
 107 struct esis_fixed {
 108         u_char  esis_proto_id;          /* network layer protocol identifier */
 109         u_char  esis_hdr_len;           /* length indicator (octets) */
 110         u_char  esis_vers;                      /* version/protocol identifier extension */
 111         u_char  esis_res1;                      /* reserved */
 112         u_char  esis_type;                      /* type code */
 113 /* technically, type should be &='d 0x1f */
 114 #define ESIS_ESH        0x02            /* End System Hello */
 115 #define ESIS_ISH        0x04            /* Intermediate System Hello */
 116 #define ESIS_RD         0x06            /* Redirect */
 117         u_char  esis_ht_msb;            /* holding time (seconds) high byte */
 118         u_char  esis_ht_lsb;            /* holding time (seconds) low byte */
 119         u_char  esis_cksum_msb;         /* checksum high byte */
 120         u_char  esis_cksum_lsb;         /* checksum low byte */
 121 };
 122 /*
 123  * Values for ESIS datagram options
 124  */
 125 #define ESISOVAL_NETMASK        0xe1    /* address mask option, RD PDU only */
 126 #define ESISOVAL_SNPAMASK       0xe2    /* snpa mask option, RD PDU only */
 127 #define ESISOVAL_ESCT           0xc6    /* end system conf. timer, ISH PDU only */
 128
 129
 130 #define ESIS_CKSUM_OFF          0x07
 131 #define ESIS_CKSUM_REQUIRED(pdu)\
 132         ((pdu->esis_cksum_msb != 0) || (pdu->esis_cksum_lsb != 0))
 133
 134 #define ESIS_VERSION    1
 135
 136 struct esis_stat {
 137         u_short         es_nomem;                       /* insufficient memory to send hello */
 138         u_short         es_badcsum;                     /* incorrect checksum */
 139         u_short         es_badvers;                     /* incorrect version number */
 140         u_short         es_badtype;                     /* unknown pdu type field */
 141         u_short         es_toosmall;            /* packet too small */
 142         u_short         es_eshsent;                     /* ESH sent */
 143         u_short         es_eshrcvd;                     /* ESH rcvd */
 144         u_short         es_ishsent;                     /* ISH sent */
 145         u_short         es_ishrcvd;                     /* ISH rcvd */
 146         u_short         es_rdsent;                      /* RD sent */
 147         u_short         es_rdrcvd;                      /* RD rcvd */
 148 };
 149
 150 #ifdef  KERNEL
 151 struct esis_stat esis_stat;
 152 #endif  /* KERNEL */