forked from osmocom/wireshark
61 lines
2.1 KiB
C
61 lines
2.1 KiB
C
/* packet-esis.h
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* Defines and such for ESIS protocol decode.
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*
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* $Id: packet-esis.h,v 1.4 2002/08/28 21:00:13 jmayer Exp $
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* Ralf Schneider <Ralf.Schneider@t-online.de>
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@zing.org>
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* Copyright 1998 Gerald Combs
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*
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*/
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#ifndef _PACKET_ESIS_H
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#define _PACKET_ESIS_H
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/* The version we support is 1 */
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#define ESIS_REQUIRED_VERSION 1
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/* ESIS PDU types */
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#define ESIS_ESH_PDU 02
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#define ESIS_ISH_PDU 04
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#define ESIS_RD_PDU 06
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/* The length of the fixed part */
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#define ESIS_HDR_FIXED_LENGTH 9
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/* Inline Defines for masking */
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#define esis_type esis_type_reserved&OSI_PDU_TYPE_MASK
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#define esis_r8 esis_type_reserved&BIT_8
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#define esis_r7 esis_type_reserved&BIT_7
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#define esis_r6 esis_type_reserved&BIT_6
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/* The fixed part (9 octets) of the ESIS protocol header */
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typedef struct {
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guint8 esis_nlpi; /* Network Layer Protocol Identifier == 0x82 */
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guint8 esis_length; /* Header ( PDU too, NoData ) length in octets */
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guint8 esis_version; /* ISIS version, must be 0x01 */
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guint8 esis_reserved; /* reserved byte, must be 0 */
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guint8 esis_type_reserved; /* packet type & MS-Bits (8-6) reserved */
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guint8 esis_holdtime[2]; /* Maximum time (sec) this PDU is valid */
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guint8 esis_checksum[2]; /* Computed on whole PDU Header, 0 means ignore */
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} esis_hdr_t;
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#endif /* _PACKET_ESIS_H */
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