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Diffstat (limited to 'epan/dissectors/packet-esis.h')
-rw-r--r-- | epan/dissectors/packet-esis.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/epan/dissectors/packet-esis.h b/epan/dissectors/packet-esis.h new file mode 100644 index 0000000000..f2231c68db --- /dev/null +++ b/epan/dissectors/packet-esis.h @@ -0,0 +1,60 @@ +/* packet-esis.h + * Defines and such for ESIS protocol decode. + * + * $Id$ + * Ralf Schneider <Ralf.Schneider@t-online.de> + * + * Ethereal - Network traffic analyzer + * By Gerald Combs <gerald@zing.org> + * Copyright 1998 Gerald Combs + * + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * + */ + +#ifndef _PACKET_ESIS_H +#define _PACKET_ESIS_H + +/* The version we support is 1 */ +#define ESIS_REQUIRED_VERSION 1 + +/* ESIS PDU types */ +#define ESIS_ESH_PDU 02 +#define ESIS_ISH_PDU 04 +#define ESIS_RD_PDU 06 + +/* The length of the fixed part */ +#define ESIS_HDR_FIXED_LENGTH 9 + +/* Inline Defines for masking */ +#define esis_type esis_type_reserved&OSI_PDU_TYPE_MASK +#define esis_r8 esis_type_reserved&BIT_8 +#define esis_r7 esis_type_reserved&BIT_7 +#define esis_r6 esis_type_reserved&BIT_6 + +/* The fixed part (9 octets) of the ESIS protocol header */ +typedef struct { + guint8 esis_nlpi; /* Network Layer Protocol Identifier == 0x82 */ + guint8 esis_length; /* Header ( PDU too, NoData ) length in octets */ + guint8 esis_version; /* ISIS version, must be 0x01 */ + guint8 esis_reserved; /* reserved byte, must be 0 */ + guint8 esis_type_reserved; /* packet type & MS-Bits (8-6) reserved */ + guint8 esis_holdtime[2]; /* Maximum time (sec) this PDU is valid */ + guint8 esis_checksum[2]; /* Computed on whole PDU Header, 0 means ignore */ +} esis_hdr_t; + +#endif /* _PACKET_ESIS_H */ |