1 /*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)esis.h 8.1 (Berkeley) 06/10/93 8 */ 9 10 /*********************************************************** 11 Copyright IBM Corporation 1987 12 13 All Rights Reserved 14 15 Permission to use, copy, modify, and distribute this software and its 16 documentation for any purpose and without fee is hereby granted, 17 provided that the above copyright notice appear in all copies and that 18 both that copyright notice and this permission notice appear in 19 supporting documentation, and that the name of IBM not be 20 used in advertising or publicity pertaining to distribution of the 21 software without specific, written prior permission. 22 23 IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING 24 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL 25 IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR 26 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, 27 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, 28 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 29 SOFTWARE. 30 31 ******************************************************************/ 32 33 /* 34 * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison 35 */ 36 /* 37 * $Header: esis.h,v 4.7 88/09/15 11:24:18 hagens Exp $ 38 * $Source: /usr/argo/sys/netiso/RCS/esis.h,v $ 39 */ 40 41 #ifndef BYTE_ORDER 42 /* 43 * Definitions for byte order, 44 * according to byte significance from low address to high. 45 */ 46 #define LITTLE_ENDIAN 1234 /* least-significant byte first (vax) */ 47 #define BIG_ENDIAN 4321 /* most-significant byte first (IBM, net) */ 48 #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long (pdp) */ 49 50 #ifdef vax 51 #define BYTE_ORDER LITTLE_ENDIAN 52 #else 53 #define BYTE_ORDER BIG_ENDIAN /* mc68000, tahoe, most others */ 54 #endif 55 #endif /* BYTE_ORDER */ 56 57 #define SNPAC_AGE 60 /* seconds */ 58 #define ESIS_CONFIG 60 /* seconds */ 59 #define ESIS_HT (ESIS_CONFIG * 2) 60 61 /* 62 * Fixed part of an ESIS header 63 */ 64 struct esis_fixed { 65 u_char esis_proto_id; /* network layer protocol identifier */ 66 u_char esis_hdr_len; /* length indicator (octets) */ 67 u_char esis_vers; /* version/protocol identifier extension */ 68 u_char esis_res1; /* reserved */ 69 u_char esis_type; /* type code */ 70 /* technically, type should be &='d 0x1f */ 71 #define ESIS_ESH 0x02 /* End System Hello */ 72 #define ESIS_ISH 0x04 /* Intermediate System Hello */ 73 #define ESIS_RD 0x06 /* Redirect */ 74 u_char esis_ht_msb; /* holding time (seconds) high byte */ 75 u_char esis_ht_lsb; /* holding time (seconds) low byte */ 76 u_char esis_cksum_msb; /* checksum high byte */ 77 u_char esis_cksum_lsb; /* checksum low byte */ 78 }; 79 /* 80 * Values for ESIS datagram options 81 */ 82 #define ESISOVAL_NETMASK 0xe1 /* address mask option, RD PDU only */ 83 #define ESISOVAL_SNPAMASK 0xe2 /* snpa mask option, RD PDU only */ 84 #define ESISOVAL_ESCT 0xc6 /* end system conf. timer, ISH PDU only */ 85 86 87 #define ESIS_CKSUM_OFF 0x07 88 #define ESIS_CKSUM_REQUIRED(pdu)\ 89 ((pdu->esis_cksum_msb != 0) || (pdu->esis_cksum_lsb != 0)) 90 91 #define ESIS_VERSION 1 92 93 struct esis_stat { 94 u_short es_nomem; /* insufficient memory to send hello */ 95 u_short es_badcsum; /* incorrect checksum */ 96 u_short es_badvers; /* incorrect version number */ 97 u_short es_badtype; /* unknown pdu type field */ 98 u_short es_toosmall; /* packet too small */ 99 u_short es_eshsent; /* ESH sent */ 100 u_short es_eshrcvd; /* ESH rcvd */ 101 u_short es_ishsent; /* ISH sent */ 102 u_short es_ishrcvd; /* ISH rcvd */ 103 u_short es_rdsent; /* RD sent */ 104 u_short es_rdrcvd; /* RD rcvd */ 105 }; 106 107 #ifdef KERNEL 108 struct esis_stat esis_stat; 109 #endif /* KERNEL */ 110