136 lines
5.3 KiB
C
136 lines
5.3 KiB
C
/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)esis.h 8.1 (Berkeley) 6/10/93
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*/
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/***********************************************************
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Copyright IBM Corporation 1987
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the name of IBM not be
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used in advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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SOFTWARE.
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******************************************************************/
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/*
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* ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison
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*/
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/*
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* $Header: esis.h,v 4.7 88/09/15 11:24:18 hagens Exp $
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* $Source: /usr/argo/sys/netiso/RCS/esis.h,v $
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*/
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#ifndef BYTE_ORDER
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/*
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* Definitions for byte order,
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* according to byte significance from low address to high.
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*/
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#define LITTLE_ENDIAN 1234 /* least-significant byte first (vax) */
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#define BIG_ENDIAN 4321 /* most-significant byte first (IBM, net) */
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#define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long (pdp) */
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#ifdef vax
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#define BYTE_ORDER LITTLE_ENDIAN
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#else
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#define BYTE_ORDER BIG_ENDIAN /* mc68000, tahoe, most others */
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#endif
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#endif /* BYTE_ORDER */
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#define SNPAC_AGE 60 /* seconds */
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#define ESIS_CONFIG 60 /* seconds */
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#define ESIS_HT (ESIS_CONFIG * 2)
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/*
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* Fixed part of an ESIS header
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*/
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struct esis_fixed {
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u_char esis_proto_id; /* network layer protocol identifier */
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u_char esis_hdr_len; /* length indicator (octets) */
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u_char esis_vers; /* version/protocol identifier extension */
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u_char esis_res1; /* reserved */
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u_char esis_type; /* type code */
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/* technically, type should be &='d 0x1f */
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#define ESIS_ESH 0x02 /* End System Hello */
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#define ESIS_ISH 0x04 /* Intermediate System Hello */
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#define ESIS_RD 0x06 /* Redirect */
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u_char esis_ht_msb; /* holding time (seconds) high byte */
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u_char esis_ht_lsb; /* holding time (seconds) low byte */
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u_char esis_cksum_msb; /* checksum high byte */
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u_char esis_cksum_lsb; /* checksum low byte */
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};
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/*
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* Values for ESIS datagram options
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*/
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#define ESISOVAL_NETMASK 0xe1 /* address mask option, RD PDU only */
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#define ESISOVAL_SNPAMASK 0xe2 /* snpa mask option, RD PDU only */
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#define ESISOVAL_ESCT 0xc6 /* end system conf. timer, ISH PDU only */
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#define ESIS_CKSUM_OFF 0x07
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#define ESIS_CKSUM_REQUIRED(pdu)\
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((pdu->esis_cksum_msb != 0) || (pdu->esis_cksum_lsb != 0))
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#define ESIS_VERSION 1
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struct esis_stat {
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u_short es_nomem; /* insufficient memory to send hello */
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u_short es_badcsum; /* incorrect checksum */
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u_short es_badvers; /* incorrect version number */
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u_short es_badtype; /* unknown pdu type field */
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u_short es_toosmall; /* packet too small */
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u_short es_eshsent; /* ESH sent */
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u_short es_eshrcvd; /* ESH rcvd */
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u_short es_ishsent; /* ISH sent */
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u_short es_ishrcvd; /* ISH rcvd */
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u_short es_rdsent; /* RD sent */
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u_short es_rdrcvd; /* RD rcvd */
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};
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#ifdef KERNEL
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struct esis_stat esis_stat;
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#endif /* KERNEL */
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