| 1 | /*- |
| 2 | * Copyright (c) 1991 The Regents of the University of California. |
| 3 | * 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 | * @(#)esis.h 7.4 (Berkeley) 5/6/91 |
| 34 | */ |
| 35 | |
| 36 | /*********************************************************** |
| 37 | Copyright IBM Corporation 1987 |
| 38 | |
| 39 | All Rights Reserved |
| 40 | |
| 41 | Permission to use, copy, modify, and distribute this software and its |
| 42 | documentation for any purpose and without fee is hereby granted, |
| 43 | provided that the above copyright notice appear in all copies and that |
| 44 | both that copyright notice and this permission notice appear in |
| 45 | supporting documentation, and that the name of IBM not be |
| 46 | used in advertising or publicity pertaining to distribution of the |
| 47 | software without specific, written prior permission. |
| 48 | |
| 49 | IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING |
| 50 | ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL |
| 51 | IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR |
| 52 | ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, |
| 53 | WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, |
| 54 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
| 55 | SOFTWARE. |
| 56 | |
| 57 | ******************************************************************/ |
| 58 | |
| 59 | /* |
| 60 | * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison |
| 61 | */ |
| 62 | /* |
| 63 | * $Header: esis.h,v 4.7 88/09/15 11:24:18 hagens Exp $ |
| 64 | * $Source: /usr/argo/sys/netiso/RCS/esis.h,v $ |
| 65 | */ |
| 66 | |
| 67 | #ifndef BYTE_ORDER |
| 68 | /* |
| 69 | * Definitions for byte order, |
| 70 | * according to byte significance from low address to high. |
| 71 | */ |
| 72 | #define LITTLE_ENDIAN 1234 /* least-significant byte first (vax) */ |
| 73 | #define BIG_ENDIAN 4321 /* most-significant byte first (IBM, net) */ |
| 74 | #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long (pdp) */ |
| 75 | |
| 76 | #ifdef vax |
| 77 | #define BYTE_ORDER LITTLE_ENDIAN |
| 78 | #else |
| 79 | #define BYTE_ORDER BIG_ENDIAN /* mc68000, tahoe, most others */ |
| 80 | #endif |
| 81 | #endif BYTE_ORDER |
| 82 | |
| 83 | #define SNPAC_AGE 60 /* seconds */ |
| 84 | #define ESIS_CONFIG 60 /* seconds */ |
| 85 | #define ESIS_HT (ESIS_CONFIG * 2) |
| 86 | |
| 87 | /* |
| 88 | * Fixed part of an ESIS header |
| 89 | */ |
| 90 | struct esis_fixed { |
| 91 | u_char esis_proto_id; /* network layer protocol identifier */ |
| 92 | u_char esis_hdr_len; /* length indicator (octets) */ |
| 93 | u_char esis_vers; /* version/protocol identifier extension */ |
| 94 | u_char esis_res1; /* reserved */ |
| 95 | u_char esis_type; /* type code */ |
| 96 | /* technically, type should be &='d 0x1f */ |
| 97 | #define ESIS_ESH 0x02 /* End System Hello */ |
| 98 | #define ESIS_ISH 0x04 /* Intermediate System Hello */ |
| 99 | #define ESIS_RD 0x06 /* Redirect */ |
| 100 | u_char esis_ht_msb; /* holding time (seconds) high byte */ |
| 101 | u_char esis_ht_lsb; /* holding time (seconds) low byte */ |
| 102 | u_char esis_cksum_msb; /* checksum high byte */ |
| 103 | u_char esis_cksum_lsb; /* checksum low byte */ |
| 104 | }; |
| 105 | /* |
| 106 | * Values for ESIS datagram options |
| 107 | */ |
| 108 | #define ESISOVAL_NETMASK 0xe1 /* address mask option, RD PDU only */ |
| 109 | #define ESISOVAL_SNPAMASK 0xe2 /* snpa mask option, RD PDU only */ |
| 110 | #define ESISOVAL_ESCT 0xc6 /* end system conf. timer, ISH PDU only */ |
| 111 | |
| 112 | |
| 113 | #define ESIS_CKSUM_OFF 0x07 |
| 114 | #define ESIS_CKSUM_REQUIRED(pdu)\ |
| 115 | ((pdu->esis_cksum_msb != 0) || (pdu->esis_cksum_lsb != 0)) |
| 116 | |
| 117 | #define ESIS_VERSION 1 |
| 118 | |
| 119 | struct esis_stat { |
| 120 | u_short es_nomem; /* insufficient memory to send hello */ |
| 121 | u_short es_badcsum; /* incorrect checksum */ |
| 122 | u_short es_badvers; /* incorrect version number */ |
| 123 | u_short es_badtype; /* unknown pdu type field */ |
| 124 | u_short es_toosmall; /* packet too small */ |
| 125 | u_short es_eshsent; /* ESH sent */ |
| 126 | u_short es_eshrcvd; /* ESH rcvd */ |
| 127 | u_short es_ishsent; /* ISH sent */ |
| 128 | u_short es_ishrcvd; /* ISH rcvd */ |
| 129 | u_short es_rdsent; /* RD sent */ |
| 130 | u_short es_rdrcvd; /* RD rcvd */ |
| 131 | }; |
| 132 | |
| 133 | #ifdef KERNEL |
| 134 | struct esis_stat esis_stat; |
| 135 | #endif KERNEL |