forked from osmocom/wireshark
c8196a1d1c
ESIS dissectors. Register the IP dissector and have dissectors that call it directly (rather than through a port table) call it through a handle. Add a routine "tvb_set_reported_length()" which a dissector can use if it was handed a tvbuff that contains more data than is actually in its part of the packet - for example, handing a padded Ethernet frame to IP; the routine sets the reported length of the tvbuff (and also adjusts the actual length, as appropriate). Then use it in IP. Given that, "ethertype()" can determine how much of the Ethernet frame was actually part of an IP datagram (and can do the same for other protocols under Ethernet that use "tvb_set_reported_length()"; have it return the actual length, and have "dissect_eth()" and "dissect_vlan()" use that to mark trailer data in Ethernet II frames as well as in 802.3 frames. svn path=/trunk/; revision=2658
61 lines
2.1 KiB
C
61 lines
2.1 KiB
C
/* packet-esis.h
|
|
* Defines and such for ESIS protocol decode.
|
|
*
|
|
* $Id: packet-esis.h,v 1.3 2000/11/18 10:38:24 guy Exp $
|
|
* 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 */
|