2000-03-09 18:31:51 +00:00
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/* packet-mpls.c
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* Routines for MPLS data packet disassembly
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2004-08-07 03:36:20 +00:00
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* RFC 3032
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2002-08-28 21:04:11 +00:00
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*
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2000-03-09 18:31:51 +00:00
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* (c) Copyright Ashok Narayanan <ashokn@cisco.com>
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*
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2009-09-10 15:30:10 +00:00
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* (c) Copyright 2006, _FF_ Francesco Fondelli <francesco.fondelli@gmail.com>
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2008-07-13 17:19:33 +00:00
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* - added MPLS OAM support, ITU-T Y.1711
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* - PW Associated Channel Header dissection as per RFC 4385
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* - PW MPLS Control Word dissection as per RFC 4385
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* - mpls subdissector table indexed by label value
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* - enhanced "what's past last mpls label?" heuristic
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2006-03-31 05:09:37 +00:00
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*
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2011-11-28 17:05:35 +00:00
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* (c) Copyright 2011, Shobhank Sharma <ssharma5@ncsu.edu>
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* - Removed some mpls preferences which are no longer relevant/needed like
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* decode PWAC payloads as PPP traffic and assume all channel types except
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* 0x21 are raw BFD.
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* - MPLS extension from PW-ACH to MPLS Generic Associated Channel as per RFC 5586
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* - Updated Pseudowire Associated Channel Types as per http://www.iana.org/assignments/pwe3-parameters
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*
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2011-11-30 20:00:42 +00:00
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* (c) Copyright 2011, Krishnamurthy Mayya <krishnamurthy.mayya@ipinfusion.com>
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* - Identification of BFD CC, BFD CV and ON-Demand CV ACH types as per RFC 6428, RFC 6426
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* respectively and the corresponding decoding of messages
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*
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2004-07-18 00:24:25 +00:00
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* $Id$
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2000-03-09 18:31:51 +00:00
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*
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2006-05-21 04:49:01 +00:00
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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2000-03-09 18:31:51 +00:00
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* Copyright 1998 Gerald Combs
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2002-08-28 21:04:11 +00:00
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*
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2000-03-09 18:31:51 +00:00
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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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2002-08-28 21:04:11 +00:00
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*
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2000-03-09 18:31:51 +00:00
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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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2002-08-28 21:04:11 +00:00
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*
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2000-03-09 18:31:51 +00:00
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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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* NOTES
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*
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* This module defines routines to handle Ethernet-encapsulated MPLS IP packets.
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* It should implement all the functionality in <draft-ietf-mpls-label-encaps-07.txt>
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* Multicast MPLS support is not tested yet
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*/
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2006-03-31 05:09:37 +00:00
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/* FF NOTES
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*
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* The OAM patch should dissect OAM pdus as described in ITU-T Y.1711
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*/
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2000-03-09 18:31:51 +00:00
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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2011-11-28 17:59:54 +00:00
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#include <string.h>
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2002-01-21 07:37:49 +00:00
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#include <epan/packet.h>
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2011-05-20 14:21:02 +00:00
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2005-09-17 00:02:31 +00:00
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#include <epan/ppptypes.h>
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#include <epan/etypes.h>
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2004-09-27 22:55:15 +00:00
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#include <epan/prefs.h>
|
2006-07-14 14:58:17 +00:00
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#include <epan/ipproto.h>
|
2008-07-13 17:19:33 +00:00
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#include <epan/addr_resolv.h>
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2011-11-28 17:59:54 +00:00
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|
2004-05-12 20:20:49 +00:00
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#include "packet-ppp.h"
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2005-03-04 22:32:06 +00:00
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#include "packet-mpls.h"
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2009-06-29 19:24:14 +00:00
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#include "packet-pw-common.h"
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2011-11-28 17:59:54 +00:00
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#include "packet-bfd.h"
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/* As per RFC 6428 http://tools.ietf.org/html/rfc6428, Section: 3.3 */
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#define ACH_TYPE_BFD_CC 0x0022
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#define ACH_TYPE_BFD_CV 0x0023
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/* As RFC 6426:http://tools.ietf.org/html/rfc6426, Section: 7.4 */
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#define ACH_TYPE_ONDEMAND_CV 0x0025
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2000-03-09 18:31:51 +00:00
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static gint proto_mpls = -1;
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2008-07-13 17:19:33 +00:00
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static gint proto_pw_ach = -1;
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static gint proto_pw_mcw = -1;
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2000-03-09 18:31:51 +00:00
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static gint ett_mpls = -1;
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2008-07-13 17:19:33 +00:00
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static gint ett_mpls_pw_ach = -1;
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static gint ett_mpls_pw_mcw = -1;
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2006-03-31 05:09:37 +00:00
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static gint ett_mpls_oam = -1;
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2011-11-28 17:05:35 +00:00
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static char PW_ACH[50]="PW Associated Channel Header";
|
2000-03-09 18:31:51 +00:00
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|
2005-03-04 22:32:06 +00:00
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const value_string special_labels[] = {
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2011-05-20 14:21:02 +00:00
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{LABEL_IP4_EXPLICIT_NULL, "IPv4 Explicit-Null"},
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{LABEL_ROUTER_ALERT, "Router Alert"},
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{LABEL_IP6_EXPLICIT_NULL, "IPv6 Explicit-Null"},
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{LABEL_IMPLICIT_NULL, "Implicit-Null"},
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{LABEL_OAM_ALERT, "OAM Alert"},
|
2011-11-28 17:05:35 +00:00
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{LABEL_GACH, "Generic Associated Channel Label (GAL)"},
|
2000-03-09 18:31:51 +00:00
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{0, NULL }
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};
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/* MPLS filter values */
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enum mpls_filter_keys {
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/* MPLS encap properties */
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MPLSF_LABEL,
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MPLSF_EXP,
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MPLSF_BOTTOM_OF_STACK,
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MPLSF_TTL,
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MPLSF_MAX
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};
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|
2009-03-27 07:17:05 +00:00
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static dissector_handle_t dissector_data;
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static dissector_handle_t dissector_ipv6;
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static dissector_handle_t dissector_ip;
|
2009-06-29 19:24:14 +00:00
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static dissector_handle_t dissector_bfd;
|
2009-03-27 07:17:05 +00:00
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static dissector_handle_t dissector_pw_eth_heuristic;
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static dissector_handle_t dissector_pw_fr;
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static dissector_handle_t dissector_pw_hdlc_nocw_fr;
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static dissector_handle_t dissector_pw_hdlc_nocw_hdlc_ppp;
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static dissector_handle_t dissector_pw_eth_cw;
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static dissector_handle_t dissector_pw_eth_nocw;
|
2009-04-27 16:57:02 +00:00
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static dissector_handle_t dissector_pw_satop;
|
2009-03-27 07:17:05 +00:00
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static dissector_handle_t dissector_itdm;
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2009-06-29 19:24:14 +00:00
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static dissector_handle_t dissector_mpls_pw_atm_n1_cw;
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static dissector_handle_t dissector_mpls_pw_atm_n1_nocw;
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static dissector_handle_t dissector_mpls_pw_atm_11_aal5pdu;
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static dissector_handle_t dissector_mpls_pw_atm_aal5_sdu;
|
2009-04-27 16:57:02 +00:00
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static dissector_handle_t dissector_pw_cesopsn;
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2009-03-27 07:17:05 +00:00
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enum mpls_default_dissector_t {
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MDD_PW_ETH_HEUR = 0
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2009-04-27 16:57:02 +00:00
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,MDD_PW_SATOP
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,MDD_PW_CESOPSN
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2009-03-27 07:17:05 +00:00
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,MDD_MPLS_PW_FR_DLCI
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,MDD_MPLS_PW_HDLC_NOCW_FRPORT
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,MDD_MPLS_PW_HDLC_NOCW_HDLC_PPP
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,MDD_MPLS_PW_ETH_CW
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,MDD_MPLS_PW_ETH_NOCW
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,MDD_MPLS_PW_GENERIC
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,MDD_ITDM
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2009-06-29 19:24:14 +00:00
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,MDD_MPLS_PW_ATM_N1_CW
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,MDD_MPLS_PW_ATM_N1_NOCW
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,MDD_MPLS_PW_ATM_11_OR_AAL5_PDU
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,MDD_MPLS_PW_ATM_AAL5_SDU
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2009-03-27 07:17:05 +00:00
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};
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/* TODO the content of mpls_default_payload menu
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* should be automatically built like mpls "decode as..." menu;
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* this way, mpls_default_payload will be automatically filled up when
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* new mpls-specific dissector added.
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*/
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2009-03-03 20:01:01 +00:00
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static enum_val_t mpls_default_payload_defs[] = {
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2009-04-27 16:57:02 +00:00
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{
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"pw satop"
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2009-06-29 19:24:14 +00:00
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,pwc_longname_pw_satop
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2009-04-27 16:57:02 +00:00
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,MDD_PW_SATOP
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},
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{
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"pw cesopsn"
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2009-06-29 19:24:14 +00:00
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,pwc_longname_pw_cesopsn
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2009-04-27 16:57:02 +00:00
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,MDD_PW_CESOPSN
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},
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2009-03-27 07:17:05 +00:00
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{
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"mpls pw ethernet heuristic"
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,"Ethernet MPLS PW (CW is heuristically detected)"
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,MDD_PW_ETH_HEUR
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},
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{
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"mpls pw fr dlci"
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,"Frame relay DLCI MPLS PW"
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,MDD_MPLS_PW_FR_DLCI
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2009-04-27 16:57:02 +00:00
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},
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2009-03-27 07:17:05 +00:00
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{
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"mpls pw hdlc no_cw fr_port"
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,"HDLC MPLS PW (no CW), FR Port mode"
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,MDD_MPLS_PW_HDLC_NOCW_FRPORT
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},
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{
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"mpls pw hdlc no_cw hdlc payload_ppp"
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,"HDLC MPLS PW (no CW), HDLC mode, PPP payload"
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,MDD_MPLS_PW_HDLC_NOCW_HDLC_PPP
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},
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{
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"mpls pw ethernet cw"
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,"Ethernet MPLS PW (with CW)"
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,MDD_MPLS_PW_ETH_CW
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},
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{
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"mpls pw ethernet no_cw"
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,"Ethernet MPLS PW (no CW, early implementations)"
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,MDD_MPLS_PW_ETH_NOCW
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},
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{
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"mpls pw generic cw"
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,"Generic MPLS PW (with Generic/Preferred MPLS CW)"
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,MDD_MPLS_PW_GENERIC
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},
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{
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"itdm"
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,"Internal TDM"
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,MDD_ITDM
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},
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2009-06-29 19:24:14 +00:00
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{
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"mpls pw atm n_to_one cw"
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,pwc_longname_pw_atm_n1_cw
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,MDD_MPLS_PW_ATM_N1_CW
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},
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{
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"mpls pw atm n_to_one no_cw"
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,pwc_longname_pw_atm_n1_nocw
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,MDD_MPLS_PW_ATM_N1_NOCW
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},
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{
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"mpls pw atm one_to_one or aal5_pdu"
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,pwc_longname_pw_atm_11_or_aal5_pdu
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,MDD_MPLS_PW_ATM_11_OR_AAL5_PDU
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},
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{
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"mpls pw atm aal5_sdu"
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,pwc_longname_pw_atm_aal5_sdu
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,MDD_MPLS_PW_ATM_AAL5_SDU
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},
|
2009-03-27 07:17:05 +00:00
|
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{
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NULL
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,NULL
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,-1
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}
|
2009-03-03 20:01:01 +00:00
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};
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|
2000-03-09 18:31:51 +00:00
|
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|
static int mpls_filter[MPLSF_MAX];
|
2008-07-13 17:19:33 +00:00
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|
2009-03-03 20:01:01 +00:00
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|
static gint mpls_default_payload = 0;
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|
2008-07-13 17:19:33 +00:00
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static int hf_mpls_1st_nibble = -1;
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static int hf_mpls_pw_ach_ver = -1;
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static int hf_mpls_pw_ach_res = -1;
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static int hf_mpls_pw_ach_channel_type = -1;
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static int hf_mpls_pw_mcw_flags = -1;
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static int hf_mpls_pw_mcw_length = -1;
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static int hf_mpls_pw_mcw_sequence_number = -1;
|
2004-05-12 20:20:49 +00:00
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|
2006-03-31 05:09:37 +00:00
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static int hf_mpls_oam_function_type = -1;
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static int hf_mpls_oam_ttsi = -1;
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static int hf_mpls_oam_frequency = -1;
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static int hf_mpls_oam_defect_type = -1;
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static int hf_mpls_oam_defect_location = -1;
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static int hf_mpls_oam_bip16 = -1;
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|
static const value_string oam_function_type_vals[] = {
|
2011-05-20 14:21:02 +00:00
|
|
|
{0x00, "Reserved"},
|
|
|
|
|
{0x01, "CV (Connectivity Verification)"},
|
|
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|
|
{0x02, "FDI (Forward Defect Indicator)"},
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|
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|
{0x03, "BDI (Backward Defect Indicator)"},
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|
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|
{0x04, "Reserved for Performance packets"},
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|
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|
{0x05, "Reserved for LB-Req (Loopback Request)"},
|
|
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|
{0x06, "Reserved for LB-Rsp (Loopback Response)"},
|
|
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|
|
{0x07, "FDD (Fast Failure Detection)"},
|
2006-03-31 05:09:37 +00:00
|
|
|
{0, NULL }
|
|
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|
};
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|
|
static const value_string oam_frequency_vals[] = {
|
2011-05-20 14:21:02 +00:00
|
|
|
{0x00, "Reserved"},
|
|
|
|
|
{0x01, "10 ms"},
|
|
|
|
|
{0x02, "20 ms"},
|
|
|
|
|
{0x03, "50 ms (default value)"},
|
|
|
|
|
{0x04, "100 ms"},
|
|
|
|
|
{0x05, "200 ms"},
|
|
|
|
|
{0x06, "500 ms"},
|
2006-03-31 05:09:37 +00:00
|
|
|
/* 7-255 Reserved */
|
|
|
|
|
{0, NULL }
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
static const value_string oam_defect_type_vals[] = {
|
2011-05-20 14:21:02 +00:00
|
|
|
{0x0000, "Reserved"},
|
|
|
|
|
{0x0101, "dServer"},
|
|
|
|
|
{0x0102, "dPeerME"},
|
|
|
|
|
{0x0201, "dLOCV"},
|
|
|
|
|
{0x0202, "dTTSI_Mismatch"},
|
|
|
|
|
{0x0203, "dTTSI_Mismerge"},
|
|
|
|
|
{0x0204, "dExcess"},
|
|
|
|
|
{0x02FF, "dUnknown"},
|
|
|
|
|
{0xFFFF, "Reserved"},
|
2006-03-31 05:09:37 +00:00
|
|
|
{0, NULL }
|
|
|
|
|
};
|
|
|
|
|
|
2009-06-29 19:24:14 +00:00
|
|
|
#if 0 /*not used yet*/
|
2009-09-10 15:30:10 +00:00
|
|
|
/*
|
|
|
|
|
* MPLS PW types
|
2009-06-29 19:24:14 +00:00
|
|
|
* http://www.iana.org/assignments/pwe3-parameters
|
|
|
|
|
*/
|
|
|
|
|
static const value_string mpls_pw_types[] = {
|
2011-05-20 14:21:02 +00:00
|
|
|
{ 0x0001, "Frame Relay DLCI ( Martini Mode )" },
|
|
|
|
|
{ 0x0002, "ATM AAL5 SDU VCC transport" },
|
|
|
|
|
{ 0x0003, "ATM transparent cell transport" },
|
|
|
|
|
{ 0x0004, "Ethernet Tagged Mode" },
|
|
|
|
|
{ 0x0005, "Ethernet" },
|
|
|
|
|
{ 0x0006, "HDLC" },
|
|
|
|
|
{ 0x0007, "PPP" },
|
|
|
|
|
{ 0x0008, "SONET/SDH Circuit Emulation Service Over MPLS" },
|
|
|
|
|
{ 0x0009, "ATM n-to-one VCC cell transport" },
|
|
|
|
|
{ 0x000A, "ATM n-to-one VPC cell transport" },
|
|
|
|
|
{ 0x000B, "IP Layer2 Transport" },
|
|
|
|
|
{ 0x000C, "ATM one-to-one VCC Cell Mode" },
|
|
|
|
|
{ 0x000D, "ATM one-to-one VPC Cell Mode" },
|
|
|
|
|
{ 0x000E, "ATM AAL5 PDU VCC transport" },
|
|
|
|
|
{ 0x000F, "Frame-Relay Port mode" },
|
|
|
|
|
{ 0x0010, "SONET/SDH Circuit Emulation over Packet" },
|
|
|
|
|
{ 0x0011, "Structure-agnostic E1 over Packet" },
|
|
|
|
|
{ 0x0012, "Structure-agnostic T1 (DS1) over Packet" },
|
|
|
|
|
{ 0x0013, "Structure-agnostic E3 over Packet" },
|
|
|
|
|
{ 0x0014, "Structure-agnostic T3 (DS3) over Packet" },
|
|
|
|
|
{ 0x0015, "CESoPSN basic mode" },
|
|
|
|
|
{ 0x0016, "TDMoIP AAL1 Mode" },
|
|
|
|
|
{ 0x0017, "CESoPSN TDM with CAS" },
|
|
|
|
|
{ 0x0018, "TDMoIP AAL2 Mode" },
|
|
|
|
|
{ 0x0019, "Frame Relay DLCI" },
|
|
|
|
|
{ 0x001A, "ROHC Transport Header-compressed Packets" },/*[RFC4995][RFC4901]*/
|
|
|
|
|
{ 0x001B, "ECRTP Transport Header-compressed Packets" },/*[RFC3545][RFC4901]*/
|
|
|
|
|
{ 0x001C, "IPHC Transport Header-compressed Packets" },/*[RFC2507][RFC4901]*/
|
|
|
|
|
{ 0x001D, "cRTP Transport Header-compressed Packets" },/*[RFC2508][RFC4901]*/
|
|
|
|
|
{ 0x001E, "ATM VP Virtual Trunk" },/*[MFA9]*/
|
|
|
|
|
{ 0x001F, "Reserved" },/*[Bryant] 2008-04-17*/
|
|
|
|
|
{ 0, NULL }
|
2009-06-29 19:24:14 +00:00
|
|
|
};
|
|
|
|
|
#endif
|
|
|
|
|
|
2009-09-10 15:30:10 +00:00
|
|
|
/*
|
2009-06-29 19:24:14 +00:00
|
|
|
* MPLS PW Associated Channel Types
|
|
|
|
|
* as per http://www.iana.org/assignments/pwe3-parameters
|
2009-09-10 15:30:10 +00:00
|
|
|
* and http://tools.ietf.org/html/draft-ietf-pwe3-vccv-bfd-05 clause 3.2
|
2009-06-29 19:24:14 +00:00
|
|
|
*/
|
|
|
|
|
static const value_string mpls_pwac_types[] = {
|
2011-11-28 17:05:35 +00:00
|
|
|
{ 0x0000, "Reserved"},
|
|
|
|
|
{ 0x0001, "Management Communication Channel (MCC)"},
|
|
|
|
|
{ 0x0002, "Signaling Communication Channel (SCC)"},
|
2011-05-20 14:21:02 +00:00
|
|
|
{ 0x0007, "BFD Control, PW-ACH-encapsulated (BFD Without IP/UDP Headers)" },
|
2011-11-28 17:05:35 +00:00
|
|
|
{ 0x000A, "MPLS Direct Loss Measurement (DLM)"},
|
|
|
|
|
{ 0x000B, "MPLS Inferred Loss Measurement (ILM)"},
|
|
|
|
|
{ 0x000C, "MPLS Delay Measurement (DM)"},
|
|
|
|
|
{ 0x000D, "MPLS Direct Loss and Delay Measurement (DLM+DM)"},
|
|
|
|
|
{ 0x000E, "MPLS Inferred Loss and Delay Measurement (ILM+DM)"},
|
2011-05-20 14:21:02 +00:00
|
|
|
{ 0x0021, "IPv4 packet" },
|
2011-11-28 17:05:35 +00:00
|
|
|
{ 0x0022, "MPLS-TP CC message"},
|
|
|
|
|
{ 0x0023, "MPLS-TP CV message"},
|
|
|
|
|
{ 0x0024, "Protection State Coordination Protocol - Channel Type (PSC-CT)"},
|
|
|
|
|
{ 0x0025, "On-Demand CV"},
|
|
|
|
|
{ 0x0026, "LI"},
|
|
|
|
|
{ 0x0057, "IPv6 packet" },
|
|
|
|
|
{ 0x0058, "Fault OAM"},
|
|
|
|
|
{ 0x7FF8, "Reserved for Experimental Use"},
|
|
|
|
|
{ 0x7FF9, "Reserved for Experimental Use"},
|
|
|
|
|
{ 0x7FFA, "Reserved for Experimental Use"},
|
|
|
|
|
{ 0x7FFB, "Reserved for Experimental Use"},
|
|
|
|
|
{ 0x7FFC, "Reserved for Experimental Use"},
|
|
|
|
|
{ 0x7FFD, "Reserved for Experimental Use"},
|
|
|
|
|
{ 0x7FFE, "Reserved for Experimental Use"},
|
|
|
|
|
{ 0x7FFF, "Reserved for Experimental Use"},
|
2011-05-20 14:21:02 +00:00
|
|
|
{ 0, NULL }
|
2009-06-29 19:24:14 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
2008-07-13 17:19:33 +00:00
|
|
|
static dissector_table_t mpls_subdissector_table;
|
Tvbuffify the IP, ICMP, TCP, UDP, OSI CLNP, OSI COTP, OSI CLTP, and OSI
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
2000-11-18 10:38:33 +00:00
|
|
|
|
2000-03-09 18:31:51 +00:00
|
|
|
/*
|
2001-01-06 05:09:35 +00:00
|
|
|
* Given a 4-byte MPLS label starting at offset "offset", in tvbuff "tvb",
|
|
|
|
|
* decode it.
|
2000-03-09 18:31:51 +00:00
|
|
|
* Return the label in "label", EXP bits in "exp",
|
|
|
|
|
* bottom_of_stack in "bos", and TTL in "ttl"
|
|
|
|
|
*/
|
2001-01-06 05:09:35 +00:00
|
|
|
void decode_mpls_label(tvbuff_t *tvb, int offset,
|
2011-05-20 14:21:02 +00:00
|
|
|
guint32 *label, guint8 *exp,
|
|
|
|
|
guint8 *bos, guint8 *ttl)
|
2000-03-09 18:31:51 +00:00
|
|
|
{
|
2001-01-06 05:09:35 +00:00
|
|
|
guint8 octet0 = tvb_get_guint8(tvb, offset+0);
|
|
|
|
|
guint8 octet1 = tvb_get_guint8(tvb, offset+1);
|
|
|
|
|
guint8 octet2 = tvb_get_guint8(tvb, offset+2);
|
|
|
|
|
|
|
|
|
|
*label = (octet0 << 12) + (octet1 << 4) + ((octet2 >> 4) & 0xff);
|
|
|
|
|
*exp = (octet2 >> 1) & 0x7;
|
|
|
|
|
*bos = (octet2 & 0x1);
|
|
|
|
|
*ttl = tvb_get_guint8(tvb, offset+3);
|
2000-03-09 18:31:51 +00:00
|
|
|
}
|
|
|
|
|
|
2008-07-13 17:19:33 +00:00
|
|
|
/*
|
|
|
|
|
* FF: PW Associated Channel Header dissection as per RFC 4385.
|
|
|
|
|
*/
|
2004-05-12 20:20:49 +00:00
|
|
|
static void
|
2008-07-13 17:19:33 +00:00
|
|
|
dissect_pw_ach(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
2004-05-12 20:20:49 +00:00
|
|
|
{
|
2008-07-13 17:19:33 +00:00
|
|
|
proto_tree *mpls_pw_ach_tree = NULL;
|
|
|
|
|
proto_item *ti = NULL;
|
|
|
|
|
tvbuff_t *next_tvb = NULL;
|
2011-11-28 17:59:54 +00:00
|
|
|
int offset = 0;
|
2008-07-13 17:19:33 +00:00
|
|
|
guint8 ver = 0;
|
|
|
|
|
guint16 res = 0;
|
|
|
|
|
guint16 channel_type = 0;
|
2004-05-12 20:20:49 +00:00
|
|
|
|
2008-07-13 17:19:33 +00:00
|
|
|
if (tvb_reported_length_remaining(tvb, 0) < 4) {
|
|
|
|
|
if (tree)
|
2004-05-12 20:20:49 +00:00
|
|
|
proto_tree_add_text(tree, tvb, 0, -1, "Error processing Message");
|
|
|
|
|
return;
|
|
|
|
|
}
|
2008-07-13 17:19:33 +00:00
|
|
|
ver = (tvb_get_guint8(tvb, 0) & 0x0F);
|
|
|
|
|
res = tvb_get_guint8(tvb, 1);
|
|
|
|
|
channel_type = tvb_get_ntohs(tvb, 2);
|
2004-05-12 20:20:49 +00:00
|
|
|
if (tree) {
|
2011-10-21 02:10:19 +00:00
|
|
|
ti = proto_tree_add_item(tree, proto_pw_ach, tvb, 0, 4, ENC_NA);
|
2008-07-13 17:19:33 +00:00
|
|
|
mpls_pw_ach_tree = proto_item_add_subtree(ti, ett_mpls_pw_ach);
|
|
|
|
|
if (mpls_pw_ach_tree == NULL)
|
|
|
|
|
return;
|
|
|
|
|
proto_tree_add_uint_format(mpls_pw_ach_tree, hf_mpls_pw_ach_ver,
|
|
|
|
|
tvb, 0, 1, ver, "Version: %d", ver);
|
|
|
|
|
ti = proto_tree_add_uint_format(mpls_pw_ach_tree, hf_mpls_pw_ach_res,
|
|
|
|
|
tvb, 1, 1, res, "Reserved: 0x%02x", res);
|
|
|
|
|
if (res != 0)
|
|
|
|
|
proto_tree_add_text(mpls_pw_ach_tree, tvb, 1, 1,
|
|
|
|
|
"Error: this byte is reserved and must be 0");
|
2009-06-29 19:24:14 +00:00
|
|
|
else
|
|
|
|
|
PROTO_ITEM_SET_HIDDEN(ti);
|
2011-11-28 17:59:54 +00:00
|
|
|
|
|
|
|
|
if ((channel_type == ACH_TYPE_BFD_CC) || (channel_type == ACH_TYPE_BFD_CV) ||
|
|
|
|
|
(channel_type == ACH_TYPE_ONDEMAND_CV)) {
|
|
|
|
|
switch (channel_type) {
|
|
|
|
|
case ACH_TYPE_BFD_CC:
|
|
|
|
|
|
|
|
|
|
proto_tree_add_uint_format (mpls_pw_ach_tree, hf_mpls_pw_ach_channel_type,
|
|
|
|
|
tvb, (offset + 2), 2, channel_type,
|
|
|
|
|
"Channel Type: %s (0x%04x)",
|
|
|
|
|
val_to_str (channel_type, mpls_pwac_types,
|
|
|
|
|
"BFD CC"), channel_type);
|
|
|
|
|
offset = offset + 4;
|
|
|
|
|
next_tvb = tvb_new_subset_remaining (tvb, offset);
|
|
|
|
|
dissect_bfd_control (next_tvb, pinfo, tree);
|
|
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case ACH_TYPE_BFD_CV:
|
|
|
|
|
|
|
|
|
|
proto_tree_add_uint_format (mpls_pw_ach_tree, hf_mpls_pw_ach_channel_type,
|
|
|
|
|
tvb, (offset + 2), 2, channel_type,
|
|
|
|
|
"Channel Type: %s (0x%04x)",
|
|
|
|
|
val_to_str (channel_type, mpls_pwac_types,
|
|
|
|
|
"BFD CV"), channel_type);
|
|
|
|
|
offset = offset + 4;
|
|
|
|
|
next_tvb = tvb_new_subset_remaining (tvb, offset);
|
|
|
|
|
dissect_bfd_control (next_tvb, pinfo, tree);
|
|
|
|
|
next_tvb = tvb_new_subset_remaining (tvb, offset);
|
|
|
|
|
dissect_bfd_mep (next_tvb, tree);
|
|
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case ACH_TYPE_ONDEMAND_CV:
|
|
|
|
|
|
|
|
|
|
proto_tree_add_uint_format (mpls_pw_ach_tree, hf_mpls_pw_ach_channel_type,
|
|
|
|
|
tvb, (offset + 2), 2, channel_type,
|
|
|
|
|
"Channel Type: %s (0x%04x)",
|
|
|
|
|
val_to_str (channel_type, mpls_pwac_types, "On-Demand CV"),
|
|
|
|
|
channel_type);
|
|
|
|
|
offset = offset + 4;
|
|
|
|
|
next_tvb = tvb_new_subset_remaining (tvb, offset);
|
|
|
|
|
dissect_mpls_echo (next_tvb, pinfo, tree);
|
|
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
2008-07-13 17:19:33 +00:00
|
|
|
proto_tree_add_uint_format(mpls_pw_ach_tree, hf_mpls_pw_ach_channel_type,
|
|
|
|
|
tvb, 2, 2, channel_type,
|
|
|
|
|
"Channel Type: %s (0x%04x)",
|
2009-06-29 19:24:14 +00:00
|
|
|
val_to_str(channel_type, mpls_pwac_types, "Unknown"),
|
2008-07-13 17:19:33 +00:00
|
|
|
channel_type);
|
2004-05-12 20:20:49 +00:00
|
|
|
}
|
2009-08-16 12:36:22 +00:00
|
|
|
next_tvb = tvb_new_subset_remaining(tvb, 4);
|
2009-06-29 19:24:14 +00:00
|
|
|
|
2009-09-10 15:30:10 +00:00
|
|
|
if (0x21 == channel_type /*IPv4, RFC4385 clause 6.*/)
|
2009-06-29 19:24:14 +00:00
|
|
|
{
|
|
|
|
|
call_dissector(dissector_ip, next_tvb, pinfo, tree);
|
2009-09-10 15:30:10 +00:00
|
|
|
}
|
2011-11-28 17:05:35 +00:00
|
|
|
else if (0x7 == channel_type /*PWACH-encapsulated BFD, RFC 5885*/)
|
2009-06-29 19:24:14 +00:00
|
|
|
{
|
|
|
|
|
call_dissector(dissector_bfd, next_tvb, pinfo, tree);
|
|
|
|
|
}
|
|
|
|
|
else if (0x57 == channel_type /*IPv6, RFC4385 clause 6.*/)
|
|
|
|
|
{
|
|
|
|
|
call_dissector(dissector_ipv6, next_tvb, pinfo, tree);
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
call_dissector(dissector_data, next_tvb, pinfo, tree);
|
2004-05-12 20:20:49 +00:00
|
|
|
}
|
2008-07-13 17:19:33 +00:00
|
|
|
}
|
2004-05-12 20:20:49 +00:00
|
|
|
|
2009-03-03 20:01:01 +00:00
|
|
|
gboolean dissect_try_cw_first_nibble( tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree )
|
|
|
|
|
{
|
2011-05-20 14:21:02 +00:00
|
|
|
guint8 nibble;
|
|
|
|
|
nibble = (tvb_get_guint8(tvb, 0 ) >> 4) & 0x0F;
|
|
|
|
|
switch ( nibble )
|
|
|
|
|
{
|
|
|
|
|
case 6:
|
|
|
|
|
call_dissector( dissector_ipv6, tvb, pinfo, tree);
|
|
|
|
|
return TRUE;
|
|
|
|
|
case 4:
|
|
|
|
|
call_dissector( dissector_ip, tvb, pinfo, tree);
|
|
|
|
|
return TRUE;
|
|
|
|
|
case 1:
|
|
|
|
|
dissect_pw_ach( tvb, pinfo, tree );
|
|
|
|
|
return TRUE;
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
return FALSE;
|
2009-03-03 20:01:01 +00:00
|
|
|
}
|
|
|
|
|
|
2008-07-13 17:19:33 +00:00
|
|
|
/*
|
|
|
|
|
* FF: Generic/Preferred PW MPLS Control Word dissection as per RFC 4385.
|
|
|
|
|
*/
|
|
|
|
|
static void
|
|
|
|
|
dissect_pw_mcw(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
|
|
|
{
|
|
|
|
|
proto_tree *mpls_pw_mcw_tree = NULL;
|
|
|
|
|
proto_item *ti = NULL;
|
|
|
|
|
tvbuff_t *next_tvb = NULL;
|
|
|
|
|
guint8 flags = 0;
|
|
|
|
|
guint8 frg = 0;
|
|
|
|
|
guint8 length = 0;
|
|
|
|
|
guint16 sequence_number = 0;
|
|
|
|
|
|
|
|
|
|
if (tvb_reported_length_remaining(tvb, 0) < 4) {
|
|
|
|
|
if (tree)
|
|
|
|
|
proto_tree_add_text(tree, tvb, 0, -1, "Error processing Message");
|
|
|
|
|
return;
|
|
|
|
|
}
|
2009-03-03 20:01:01 +00:00
|
|
|
|
2009-09-10 15:30:10 +00:00
|
|
|
if ( dissect_try_cw_first_nibble( tvb, pinfo, tree ))
|
2009-03-03 20:01:01 +00:00
|
|
|
return;
|
|
|
|
|
|
2008-07-13 17:19:33 +00:00
|
|
|
/* bits 4 to 7 and FRG bits are displayed together */
|
|
|
|
|
flags = (tvb_get_guint8(tvb, 0) & 0x0F) << 2;
|
|
|
|
|
frg = (tvb_get_guint8(tvb, 1) & 0xC0) >> 6;
|
|
|
|
|
flags |= frg;
|
|
|
|
|
length = tvb_get_guint8(tvb, 1) & 0x3F;
|
|
|
|
|
sequence_number = tvb_get_ntohs(tvb, 2);
|
|
|
|
|
if (tree) {
|
2011-10-21 02:10:19 +00:00
|
|
|
ti = proto_tree_add_item(tree, proto_pw_mcw, tvb, 0, 4, ENC_NA);
|
2008-07-13 17:19:33 +00:00
|
|
|
mpls_pw_mcw_tree = proto_item_add_subtree(ti, ett_mpls_pw_mcw);
|
|
|
|
|
if (mpls_pw_mcw_tree == NULL)
|
|
|
|
|
return;
|
|
|
|
|
proto_tree_add_uint_format(mpls_pw_mcw_tree, hf_mpls_pw_mcw_flags,
|
|
|
|
|
tvb, 0, 1, flags, "Flags: 0x%02x", flags);
|
2011-05-20 14:21:02 +00:00
|
|
|
proto_tree_add_uint_format(mpls_pw_mcw_tree, hf_mpls_pw_mcw_length,
|
2008-07-13 17:19:33 +00:00
|
|
|
tvb, 1, 1, length, "Length: %u", length);
|
|
|
|
|
proto_tree_add_uint_format(mpls_pw_mcw_tree, hf_mpls_pw_mcw_sequence_number,
|
|
|
|
|
tvb, 2, 2, sequence_number,
|
|
|
|
|
"Sequence Number: %d", sequence_number);
|
|
|
|
|
}
|
2009-08-16 12:36:22 +00:00
|
|
|
next_tvb = tvb_new_subset_remaining(tvb, 4);
|
2009-03-27 07:17:05 +00:00
|
|
|
call_dissector( dissector_data, next_tvb, pinfo, tree );
|
2004-05-12 20:20:49 +00:00
|
|
|
}
|
|
|
|
|
|
2006-03-31 05:09:37 +00:00
|
|
|
static void
|
2009-09-10 15:30:10 +00:00
|
|
|
dissect_mpls_oam_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, proto_tree *mpls_tree,
|
2011-05-20 14:21:02 +00:00
|
|
|
int offset, guint8 exp, guint8 bos, guint8 ttl)
|
2006-03-31 05:09:37 +00:00
|
|
|
{
|
|
|
|
|
proto_tree *mpls_oam_tree = NULL;
|
|
|
|
|
proto_item *ti = NULL;
|
|
|
|
|
int functype = -1;
|
|
|
|
|
const guint8 allone[] = { 0xff, 0xff };
|
2009-09-10 15:30:10 +00:00
|
|
|
const guint8 allzero[] = { 0x00, 0x00, 0x00, 0x00, 0x00,
|
2011-05-20 14:21:02 +00:00
|
|
|
0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
0x00, 0x00, 0x00, 0x00, 0x00 };
|
2009-09-10 15:30:10 +00:00
|
|
|
|
2006-03-31 05:09:37 +00:00
|
|
|
/* if called with main tree == null just set col info with func type string and return */
|
|
|
|
|
if (!tree) {
|
2011-05-20 14:21:02 +00:00
|
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
|
|
|
if (tvb_bytes_exist(tvb, offset, 1)) {
|
|
|
|
|
functype = tvb_get_guint8(tvb, offset);
|
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " (OAM: %s)",
|
|
|
|
|
(functype == 0x01) ? "CV" :
|
|
|
|
|
(functype == 0x02) ? "FDI" :
|
|
|
|
|
(functype == 0x03) ? "BDI" :
|
|
|
|
|
(functype == 0x07) ? "FDD" : "reserved/unknown");
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
return;
|
2006-03-31 05:09:37 +00:00
|
|
|
}
|
2009-09-10 15:30:10 +00:00
|
|
|
|
2006-03-31 05:09:37 +00:00
|
|
|
/* sanity checks */
|
|
|
|
|
if (!mpls_tree)
|
2011-05-20 14:21:02 +00:00
|
|
|
return;
|
2006-03-31 05:09:37 +00:00
|
|
|
|
|
|
|
|
if (!tvb_bytes_exist(tvb, offset, 44)) {
|
2011-05-20 14:21:02 +00:00
|
|
|
/* ITU-T Y.1711, 5.3: OAM pdus must have a minimum payload length of 44 bytes */
|
|
|
|
|
proto_tree_add_text(mpls_tree, tvb, offset, -1, "Error: must have a minimum payload length of 44 bytes");
|
|
|
|
|
return;
|
2006-03-31 05:09:37 +00:00
|
|
|
}
|
2009-09-10 15:30:10 +00:00
|
|
|
|
2006-03-31 05:09:37 +00:00
|
|
|
ti = proto_tree_add_text(mpls_tree, tvb, offset, 44, "MPLS Operation & Maintenance");
|
|
|
|
|
mpls_oam_tree = proto_item_add_subtree(ti, ett_mpls_oam);
|
2009-09-10 15:30:10 +00:00
|
|
|
|
|
|
|
|
if (!mpls_oam_tree)
|
2011-05-20 14:21:02 +00:00
|
|
|
return;
|
2009-09-10 15:30:10 +00:00
|
|
|
|
2006-03-31 05:09:37 +00:00
|
|
|
/* checks for exp, bos and ttl encoding */
|
2009-09-10 15:30:10 +00:00
|
|
|
|
2006-03-31 05:09:37 +00:00
|
|
|
if (exp!=0)
|
2011-05-20 14:21:02 +00:00
|
|
|
proto_tree_add_text(mpls_oam_tree, tvb, offset - 2, 1, "Warning: Exp bits should be 0 for OAM");
|
2006-03-31 05:09:37 +00:00
|
|
|
|
|
|
|
|
if (bos!=1)
|
2011-05-20 14:21:02 +00:00
|
|
|
proto_tree_add_text(mpls_oam_tree, tvb, offset - 2, 1, "Warning: S bit should be 1 for OAM");
|
2009-09-10 15:30:10 +00:00
|
|
|
|
2006-03-31 05:09:37 +00:00
|
|
|
if (ttl!=1)
|
2011-05-20 14:21:02 +00:00
|
|
|
proto_tree_add_text(mpls_oam_tree, tvb, offset - 1, 1, "Warning: TTL should be 1 for OAM");
|
2006-03-31 05:09:37 +00:00
|
|
|
|
|
|
|
|
/* starting dissection */
|
2009-09-10 15:30:10 +00:00
|
|
|
|
2006-03-31 05:09:37 +00:00
|
|
|
functype = tvb_get_guint8(tvb, offset);
|
2011-10-06 03:35:44 +00:00
|
|
|
proto_tree_add_item(mpls_oam_tree, hf_mpls_oam_function_type, tvb, offset, 1, ENC_LITTLE_ENDIAN);
|
2006-03-31 05:09:37 +00:00
|
|
|
offset++;
|
2009-09-10 15:30:10 +00:00
|
|
|
|
2006-03-31 05:09:37 +00:00
|
|
|
switch(functype) {
|
|
|
|
|
case 0x01: /* CV */
|
2011-05-20 14:21:02 +00:00
|
|
|
{
|
|
|
|
|
guint32 lsrid_ipv4addr;
|
|
|
|
|
|
|
|
|
|
/* 3 octets reserved (all 0x00) */
|
|
|
|
|
if (tvb_memeql(tvb, offset, allzero, 3) == -1) {
|
|
|
|
|
proto_tree_add_text(mpls_oam_tree, tvb, offset, 3,
|
|
|
|
|
"Error: these bytes are reserved and must be 0x00");
|
|
|
|
|
}
|
|
|
|
|
offset+=3;
|
|
|
|
|
|
|
|
|
|
/* ttsi (ipv4 flavor as in RFC 2373) */
|
|
|
|
|
if (tvb_memeql(tvb, offset, allzero, 10) == -1) {
|
|
|
|
|
proto_tree_add_text(mpls_oam_tree, tvb, offset, 10,
|
|
|
|
|
"Error: these bytes are padding and must be 0x00");
|
|
|
|
|
}
|
|
|
|
|
offset+=10;
|
|
|
|
|
|
|
|
|
|
if (tvb_memeql(tvb, offset, allone, 2) == -1) {
|
|
|
|
|
proto_tree_add_text(mpls_oam_tree, tvb, offset, 2,
|
|
|
|
|
"Error: these bytes are padding and must be 0xFF");
|
|
|
|
|
}
|
|
|
|
|
offset+=2;
|
|
|
|
|
|
|
|
|
|
lsrid_ipv4addr = tvb_get_ipv4(tvb, offset);
|
|
|
|
|
proto_tree_add_text(mpls_oam_tree, tvb, offset, 4, "LSR ID: %s", ip_to_str((guint8 *)&lsrid_ipv4addr));
|
|
|
|
|
offset+=4;
|
|
|
|
|
|
|
|
|
|
proto_tree_add_text(mpls_oam_tree, tvb, offset, 4, "LSP ID: %d", tvb_get_ntohl(tvb, offset));
|
|
|
|
|
offset+=4;
|
|
|
|
|
|
|
|
|
|
/* 18 octets of padding (all 0x00) */
|
|
|
|
|
if (tvb_memeql(tvb, offset, allzero, 18) == -1) {
|
|
|
|
|
proto_tree_add_text(mpls_oam_tree, tvb, offset, 18,
|
|
|
|
|
"Error: these bytes are padding and must be 0x00");
|
|
|
|
|
}
|
|
|
|
|
offset+=18;
|
|
|
|
|
}
|
|
|
|
|
break;
|
2006-03-31 05:09:37 +00:00
|
|
|
|
|
|
|
|
case 0x02: /* FDI */
|
|
|
|
|
case 0x03: /* BDI */
|
2011-05-20 14:21:02 +00:00
|
|
|
{
|
|
|
|
|
guint32 lsrid_ipv4addr;
|
|
|
|
|
|
|
|
|
|
/* 1 octets reserved (all 0x00) */
|
|
|
|
|
if (tvb_memeql(tvb, offset, allzero, 1) == -1) {
|
|
|
|
|
proto_tree_add_text(mpls_oam_tree, tvb, offset, 3,
|
|
|
|
|
"Error: this byte is reserved and must be 0x00");
|
|
|
|
|
}
|
|
|
|
|
offset++;
|
|
|
|
|
|
2011-10-06 03:35:44 +00:00
|
|
|
proto_tree_add_item(mpls_oam_tree, hf_mpls_oam_defect_type, tvb, offset, 2, ENC_LITTLE_ENDIAN);
|
2011-05-20 14:21:02 +00:00
|
|
|
offset+=2;
|
|
|
|
|
|
|
|
|
|
/* ttsi (ipv4 flavor as in RFC 2373) is optional if not used must be set to all 0x00 */
|
|
|
|
|
if (tvb_memeql(tvb, offset, allzero, 20) == 0) {
|
|
|
|
|
proto_tree_add_text(mpls_oam_tree, tvb, offset, 20, "TTSI not preset (optional for FDI/BDI)");
|
|
|
|
|
offset+=20;
|
|
|
|
|
} else {
|
|
|
|
|
if (tvb_memeql(tvb, offset, allzero, 10) == -1) {
|
|
|
|
|
proto_tree_add_text(mpls_oam_tree, tvb, offset, 10,
|
|
|
|
|
"Error: these bytes are padding and must be 0x00");
|
|
|
|
|
}
|
|
|
|
|
offset+=10;
|
|
|
|
|
|
|
|
|
|
if (tvb_memeql(tvb, offset, allone, 2) == -1) {
|
|
|
|
|
proto_tree_add_text(mpls_oam_tree, tvb, offset, 2,
|
|
|
|
|
"Error: these bytes are padding and must be 0xFF");
|
|
|
|
|
}
|
|
|
|
|
offset+=2;
|
|
|
|
|
|
|
|
|
|
lsrid_ipv4addr = tvb_get_ipv4(tvb, offset);
|
|
|
|
|
proto_tree_add_text(mpls_oam_tree, tvb, offset, 4, "LSR ID: %s", ip_to_str((guint8 *)&lsrid_ipv4addr));
|
|
|
|
|
offset+=4;
|
|
|
|
|
|
|
|
|
|
proto_tree_add_text(mpls_oam_tree, tvb, offset, 4, "LSP ID: %d", tvb_get_ntohl(tvb, offset));
|
|
|
|
|
offset+=4;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* defect location */
|
2011-10-06 03:35:44 +00:00
|
|
|
proto_tree_add_item(mpls_oam_tree, hf_mpls_oam_defect_location, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
2011-05-20 14:21:02 +00:00
|
|
|
offset+=4;
|
|
|
|
|
|
|
|
|
|
/* 14 octets of padding (all 0x00) */
|
|
|
|
|
if (tvb_memeql(tvb, offset, allzero, 14) == -1) {
|
|
|
|
|
proto_tree_add_text(mpls_oam_tree, tvb, offset, 14,
|
|
|
|
|
"Error: these bytes are padding and must be 0x00");
|
|
|
|
|
}
|
|
|
|
|
offset+=14;
|
|
|
|
|
}
|
|
|
|
|
break;
|
2009-09-10 15:30:10 +00:00
|
|
|
|
|
|
|
|
case 0x07: /* FDD */
|
2011-05-20 14:21:02 +00:00
|
|
|
{
|
|
|
|
|
guint32 lsrid_ipv4addr;
|
|
|
|
|
|
|
|
|
|
/* 3 octets reserved (all 0x00) */
|
|
|
|
|
if (tvb_memeql(tvb, offset, allzero, 3) == -1) {
|
|
|
|
|
proto_tree_add_text(mpls_oam_tree, tvb, offset, 3,
|
|
|
|
|
"Error: these bytes are reserved and must be 0x00");
|
|
|
|
|
}
|
|
|
|
|
offset+=3;
|
|
|
|
|
|
|
|
|
|
/* ttsi (ipv4 flavor as in RFC 2373) */
|
|
|
|
|
if (tvb_memeql(tvb, offset, allzero, 10) == -1) {
|
|
|
|
|
proto_tree_add_text(mpls_oam_tree, tvb, offset, 10,
|
|
|
|
|
"Error: these bytes are padding and must be 0x00");
|
|
|
|
|
}
|
|
|
|
|
offset+=10;
|
|
|
|
|
|
|
|
|
|
if (tvb_memeql(tvb, offset, allone, 2) == -1) {
|
|
|
|
|
proto_tree_add_text(mpls_oam_tree, tvb, offset, 2,
|
|
|
|
|
"Error: these bytes are padding and must be 0xFF");
|
|
|
|
|
}
|
|
|
|
|
offset+=2;
|
|
|
|
|
|
|
|
|
|
lsrid_ipv4addr = tvb_get_ipv4(tvb, offset);
|
|
|
|
|
proto_tree_add_text(mpls_oam_tree, tvb, offset, 4, "LSR ID: %s", ip_to_str((guint8 *)&lsrid_ipv4addr));
|
|
|
|
|
offset+=4;
|
|
|
|
|
|
|
|
|
|
proto_tree_add_text(mpls_oam_tree, tvb, offset, 4, "LSP ID: %d", tvb_get_ntohl(tvb, offset));
|
|
|
|
|
offset+=4;
|
|
|
|
|
|
2011-10-06 03:35:44 +00:00
|
|
|
proto_tree_add_item(mpls_oam_tree, hf_mpls_oam_frequency, tvb, offset, 1, ENC_LITTLE_ENDIAN);
|
2011-05-20 14:21:02 +00:00
|
|
|
offset++;
|
|
|
|
|
|
|
|
|
|
/* 17 octets of padding (all 0x00) */
|
|
|
|
|
if (tvb_memeql(tvb, offset, allzero, 17) == -1) {
|
|
|
|
|
proto_tree_add_text(mpls_oam_tree, tvb, offset, 17,
|
|
|
|
|
"Error: these bytes are padding and must be 0x00");
|
|
|
|
|
}
|
|
|
|
|
offset+=17;
|
|
|
|
|
}
|
|
|
|
|
break;
|
2006-03-31 05:09:37 +00:00
|
|
|
|
|
|
|
|
default:
|
2011-05-20 14:21:02 +00:00
|
|
|
proto_tree_add_text(mpls_oam_tree, tvb, offset - 1, -1, "Unknown MPLS OAM pdu");
|
|
|
|
|
return;
|
2006-03-31 05:09:37 +00:00
|
|
|
}
|
2009-09-10 15:30:10 +00:00
|
|
|
|
2006-03-31 05:09:37 +00:00
|
|
|
/* BIP16 */
|
2011-10-06 03:35:44 +00:00
|
|
|
proto_tree_add_item(mpls_oam_tree, hf_mpls_oam_bip16, tvb, offset, 2, ENC_LITTLE_ENDIAN);
|
2006-03-31 05:09:37 +00:00
|
|
|
offset+=2;
|
|
|
|
|
}
|
2008-07-13 17:19:33 +00:00
|
|
|
|
2000-04-16 22:59:37 +00:00
|
|
|
static void
|
2002-08-28 21:04:11 +00:00
|
|
|
dissect_mpls(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
2000-03-09 18:31:51 +00:00
|
|
|
{
|
2001-01-06 05:09:35 +00:00
|
|
|
int offset = 0;
|
2008-12-22 16:10:11 +00:00
|
|
|
guint32 label = LABEL_INVALID;
|
2000-03-09 18:31:51 +00:00
|
|
|
guint8 exp;
|
|
|
|
|
guint8 bos;
|
|
|
|
|
guint8 ttl;
|
2006-04-16 22:00:11 +00:00
|
|
|
proto_tree *mpls_tree = NULL;
|
2000-03-09 18:31:51 +00:00
|
|
|
proto_item *ti;
|
2001-01-06 05:09:35 +00:00
|
|
|
tvbuff_t *next_tvb;
|
2000-03-09 18:31:51 +00:00
|
|
|
|
2009-08-09 07:59:51 +00:00
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "MPLS");
|
2002-08-28 21:04:11 +00:00
|
|
|
|
2009-08-09 07:59:51 +00:00
|
|
|
col_set_str(pinfo->cinfo, COL_INFO, "MPLS Label Switched Packet");
|
2000-03-09 18:31:51 +00:00
|
|
|
|
|
|
|
|
/* Start Decoding Here. */
|
2001-01-06 05:09:35 +00:00
|
|
|
while (tvb_reported_length_remaining(tvb, offset) > 0) {
|
2009-09-10 15:30:10 +00:00
|
|
|
|
2011-05-20 14:21:02 +00:00
|
|
|
decode_mpls_label(tvb, offset, &label, &exp, &bos, &ttl);
|
|
|
|
|
pinfo->mpls_label = label;
|
|
|
|
|
|
|
|
|
|
if (tree) {
|
|
|
|
|
|
2011-10-21 02:10:19 +00:00
|
|
|
ti = proto_tree_add_item(tree, proto_mpls, tvb, offset, 4, ENC_NA);
|
2011-05-20 14:21:02 +00:00
|
|
|
mpls_tree = proto_item_add_subtree(ti, ett_mpls);
|
|
|
|
|
|
|
|
|
|
proto_item_append_text(ti, ", Label: %u", label);
|
|
|
|
|
if (label <= LABEL_MAX_RESERVED){
|
|
|
|
|
proto_tree_add_uint_format(mpls_tree, mpls_filter[MPLSF_LABEL], tvb,
|
|
|
|
|
offset, 3, label, "MPLS Label: %u (%s)",
|
|
|
|
|
label, val_to_str(label, special_labels,
|
|
|
|
|
"Reserved - Unknown"));
|
|
|
|
|
proto_item_append_text(ti, " (%s)", val_to_str(label, special_labels,
|
|
|
|
|
"Reserved - Unknown"));
|
|
|
|
|
} else {
|
|
|
|
|
proto_tree_add_uint_format(mpls_tree, mpls_filter[MPLSF_LABEL], tvb,
|
|
|
|
|
offset, 3, label, "MPLS Label: %u", label);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
proto_tree_add_uint(mpls_tree,mpls_filter[MPLSF_EXP], tvb,
|
|
|
|
|
offset+2,1, exp);
|
|
|
|
|
proto_item_append_text(ti, ", Exp: %u", exp);
|
|
|
|
|
|
|
|
|
|
proto_tree_add_uint(mpls_tree,mpls_filter[MPLSF_BOTTOM_OF_STACK], tvb,
|
|
|
|
|
offset+2,1, bos);
|
|
|
|
|
proto_item_append_text(ti, ", S: %u", bos);
|
|
|
|
|
|
|
|
|
|
proto_tree_add_uint(mpls_tree,mpls_filter[MPLSF_TTL], tvb,
|
|
|
|
|
offset+3,1, ttl);
|
|
|
|
|
proto_item_append_text(ti, ", TTL: %u", ttl);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (label == LABEL_OAM_ALERT) {
|
|
|
|
|
/* OAM pdus are injected in normal data plane flow in order to test a LSP,
|
|
|
|
|
* they carry no user data.
|
|
|
|
|
*/
|
|
|
|
|
dissect_mpls_oam_pdu(tvb, pinfo, tree, mpls_tree, offset + 4, exp, bos, ttl);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
offset += 4;
|
2011-11-28 17:05:35 +00:00
|
|
|
|
|
|
|
|
if (label == LABEL_GACH && !bos)
|
|
|
|
|
{
|
|
|
|
|
proto_tree_add_text(tree, tvb, 0, -1, "Invalid Label");
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (label == LABEL_GACH && bos) {
|
2011-11-28 18:10:57 +00:00
|
|
|
g_strlcpy(PW_ACH,"Generic Associated Channel Header",50);
|
2011-11-28 17:05:35 +00:00
|
|
|
next_tvb = tvb_new_subset_remaining(tvb, offset);
|
|
|
|
|
dissect_pw_ach( next_tvb, pinfo, tree );
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
else
|
2011-11-28 18:10:57 +00:00
|
|
|
g_strlcpy(PW_ACH,"PW Associated Channel Header",50);
|
2011-11-28 17:05:35 +00:00
|
|
|
|
2011-05-20 14:21:02 +00:00
|
|
|
if (bos) break;
|
2000-03-09 18:31:51 +00:00
|
|
|
}
|
2008-07-13 17:19:33 +00:00
|
|
|
|
2009-08-16 12:36:22 +00:00
|
|
|
next_tvb = tvb_new_subset_remaining(tvb, offset);
|
2001-11-07 20:26:38 +00:00
|
|
|
|
2010-12-20 05:35:29 +00:00
|
|
|
if ( !dissector_try_uint(mpls_subdissector_table, label, next_tvb, pinfo, tree))
|
2009-03-03 20:01:01 +00:00
|
|
|
{
|
|
|
|
|
switch ( mpls_default_payload )
|
|
|
|
|
{
|
2009-04-27 16:57:02 +00:00
|
|
|
case MDD_PW_SATOP:
|
|
|
|
|
call_dissector(dissector_pw_satop, next_tvb, pinfo, tree);
|
|
|
|
|
break;
|
|
|
|
|
case MDD_PW_CESOPSN:
|
|
|
|
|
call_dissector(dissector_pw_cesopsn, next_tvb, pinfo, tree);
|
|
|
|
|
break;
|
2009-03-27 07:17:05 +00:00
|
|
|
case MDD_PW_ETH_HEUR:
|
|
|
|
|
call_dissector(dissector_pw_eth_heuristic, next_tvb, pinfo, tree);
|
|
|
|
|
break;
|
|
|
|
|
case MDD_MPLS_PW_FR_DLCI:
|
|
|
|
|
call_dissector(dissector_pw_fr, next_tvb, pinfo, tree);
|
|
|
|
|
break;
|
|
|
|
|
case MDD_MPLS_PW_HDLC_NOCW_FRPORT:
|
|
|
|
|
call_dissector(dissector_pw_hdlc_nocw_fr, next_tvb, pinfo, tree);
|
2009-03-03 20:01:01 +00:00
|
|
|
break;
|
2009-03-27 07:17:05 +00:00
|
|
|
case MDD_MPLS_PW_HDLC_NOCW_HDLC_PPP:
|
2011-11-28 17:05:35 +00:00
|
|
|
call_dissector(dissector_pw_hdlc_nocw_hdlc_ppp,next_tvb, pinfo, tree);
|
2009-03-03 20:01:01 +00:00
|
|
|
break;
|
2009-03-27 07:17:05 +00:00
|
|
|
case MDD_MPLS_PW_ETH_CW:
|
|
|
|
|
call_dissector(dissector_pw_eth_cw, next_tvb, pinfo, tree);
|
|
|
|
|
break;
|
|
|
|
|
case MDD_MPLS_PW_ETH_NOCW:
|
|
|
|
|
call_dissector(dissector_pw_eth_nocw, next_tvb, pinfo, tree);
|
|
|
|
|
break;
|
|
|
|
|
case MDD_ITDM:
|
|
|
|
|
call_dissector(dissector_itdm, next_tvb, pinfo, tree);
|
2009-03-03 20:01:01 +00:00
|
|
|
break;
|
2009-06-29 19:24:14 +00:00
|
|
|
case MDD_MPLS_PW_ATM_N1_CW:
|
|
|
|
|
call_dissector(dissector_mpls_pw_atm_n1_cw, next_tvb, pinfo, tree);
|
|
|
|
|
break;
|
|
|
|
|
case MDD_MPLS_PW_ATM_N1_NOCW:
|
|
|
|
|
call_dissector(dissector_mpls_pw_atm_n1_nocw, next_tvb, pinfo, tree);
|
|
|
|
|
break;
|
|
|
|
|
case MDD_MPLS_PW_ATM_11_OR_AAL5_PDU:
|
|
|
|
|
call_dissector(dissector_mpls_pw_atm_11_aal5pdu, next_tvb, pinfo, tree);
|
|
|
|
|
break;
|
|
|
|
|
case MDD_MPLS_PW_ATM_AAL5_SDU:
|
|
|
|
|
call_dissector(dissector_mpls_pw_atm_aal5_sdu, next_tvb, pinfo, tree);
|
|
|
|
|
break;
|
2009-09-10 15:30:10 +00:00
|
|
|
default: /*fallthrough*/
|
2011-05-20 14:21:02 +00:00
|
|
|
case MDD_MPLS_PW_GENERIC:
|
2008-07-13 17:19:33 +00:00
|
|
|
dissect_pw_mcw(next_tvb, pinfo, tree);
|
2009-03-03 20:01:01 +00:00
|
|
|
break;
|
2008-07-13 17:19:33 +00:00
|
|
|
}
|
2001-11-07 20:26:38 +00:00
|
|
|
}
|
2000-03-09 18:31:51 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
proto_register_mpls(void)
|
|
|
|
|
{
|
2011-05-20 14:21:02 +00:00
|
|
|
static hf_register_info mplsf_info[] = {
|
|
|
|
|
|
|
|
|
|
/* MPLS header fields */
|
|
|
|
|
{&mpls_filter[MPLSF_LABEL],
|
|
|
|
|
{"MPLS Label", "mpls.label", FT_UINT32, BASE_DEC, VALS(special_labels), 0x0,
|
|
|
|
|
NULL, HFILL }},
|
|
|
|
|
|
|
|
|
|
{&mpls_filter[MPLSF_EXP],
|
|
|
|
|
{"MPLS Experimental Bits", "mpls.exp", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
|
|
|
NULL, HFILL }},
|
|
|
|
|
|
|
|
|
|
{&mpls_filter[MPLSF_BOTTOM_OF_STACK],
|
|
|
|
|
{"MPLS Bottom Of Label Stack", "mpls.bottom", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
|
|
|
NULL, HFILL }},
|
|
|
|
|
|
|
|
|
|
{&mpls_filter[MPLSF_TTL],
|
|
|
|
|
{"MPLS TTL", "mpls.ttl", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
|
|
|
NULL, HFILL }},
|
|
|
|
|
|
|
|
|
|
/* 1st nibble */
|
|
|
|
|
{&hf_mpls_1st_nibble,
|
|
|
|
|
{"MPLS 1st nibble", "mpls.1st_nibble", FT_UINT8,
|
|
|
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
|
|
|
|
|
|
|
|
/* PW Associated Channel Header fields */
|
|
|
|
|
{&hf_mpls_pw_ach_ver,
|
|
|
|
|
{"PW Associated Channel Version", "pwach.ver", FT_UINT8, BASE_DEC,
|
|
|
|
|
NULL, 0x0, NULL, HFILL }},
|
|
|
|
|
|
|
|
|
|
{&hf_mpls_pw_ach_res,
|
|
|
|
|
{"Reserved", "pwach.res", FT_UINT8, BASE_DEC,
|
|
|
|
|
NULL, 0x0, NULL, HFILL }},
|
|
|
|
|
|
|
|
|
|
{&hf_mpls_pw_ach_channel_type,
|
|
|
|
|
{"PW Associated Channel Type", "pwach.channel_type", FT_UINT16, BASE_HEX,
|
|
|
|
|
NULL, 0x0, NULL, HFILL }},
|
|
|
|
|
|
|
|
|
|
/* Generic/Preferred PW MPLS Control Word fields */
|
|
|
|
|
{&hf_mpls_pw_mcw_flags,
|
|
|
|
|
{"Generic/Preferred PW MPLS Control Word Flags", "pwmcw.flags", FT_UINT8,
|
|
|
|
|
BASE_HEX, NULL, 0x0, NULL,
|
|
|
|
|
HFILL }},
|
|
|
|
|
|
|
|
|
|
{&hf_mpls_pw_mcw_length,
|
|
|
|
|
{"Generic/Preferred PW MPLS Control Word Length", "pwmcw.length", FT_UINT8,
|
|
|
|
|
BASE_DEC, NULL, 0x0, NULL,
|
|
|
|
|
HFILL }},
|
|
|
|
|
|
|
|
|
|
{&hf_mpls_pw_mcw_sequence_number,
|
|
|
|
|
{"Generic/Preferred PW MPLS Control Word Sequence Number",
|
|
|
|
|
"pwmcw.sequence_number", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
|
|
|
NULL, HFILL }},
|
|
|
|
|
|
|
|
|
|
/* OAM header fields */
|
|
|
|
|
{&hf_mpls_oam_function_type,
|
|
|
|
|
{"Function Type", "mpls.oam.function_type", FT_UINT8,
|
|
|
|
|
BASE_HEX, VALS(oam_function_type_vals), 0x0, "Function Type codepoint", HFILL }},
|
|
|
|
|
|
|
|
|
|
{&hf_mpls_oam_ttsi,
|
|
|
|
|
{"Trail Termination Source Identifier", "mpls.oam.ttsi", FT_UINT32,
|
|
|
|
|
BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
|
|
|
|
|
|
|
|
{&hf_mpls_oam_frequency,
|
|
|
|
|
{"Frequency", "mpls.oam.frequency", FT_UINT8,
|
|
|
|
|
BASE_HEX, VALS(oam_frequency_vals), 0x0, "Frequency of probe injection", HFILL }},
|
|
|
|
|
|
|
|
|
|
{&hf_mpls_oam_defect_type,
|
|
|
|
|
{"Defect Type", "mpls.oam.defect_type", FT_UINT16,
|
|
|
|
|
BASE_HEX, VALS(oam_defect_type_vals), 0x0, NULL, HFILL }},
|
|
|
|
|
|
|
|
|
|
{&hf_mpls_oam_defect_location,
|
|
|
|
|
{"Defect Location (AS)", "mpls.oam.defect_location", FT_UINT32,
|
|
|
|
|
BASE_DEC, NULL, 0x0, "Defect Location", HFILL }},
|
|
|
|
|
|
|
|
|
|
{&hf_mpls_oam_bip16,
|
|
|
|
|
{"BIP16", "mpls.oam.bip16", FT_UINT16,
|
|
|
|
|
BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
static gint *ett[] = {
|
|
|
|
|
&ett_mpls,
|
|
|
|
|
&ett_mpls_pw_ach,
|
|
|
|
|
&ett_mpls_pw_mcw,
|
|
|
|
|
&ett_mpls_oam,
|
|
|
|
|
};
|
|
|
|
|
module_t * module_mpls;
|
|
|
|
|
|
|
|
|
|
/* FF: mpls subdissector table is indexed by label */
|
|
|
|
|
mpls_subdissector_table = register_dissector_table("mpls.label",
|
|
|
|
|
"MPLS protocol",
|
|
|
|
|
FT_UINT32, BASE_DEC);
|
|
|
|
|
proto_mpls = proto_register_protocol("MultiProtocol Label Switching Header",
|
|
|
|
|
"MPLS", "mpls");
|
2011-11-28 17:05:35 +00:00
|
|
|
proto_pw_ach = proto_register_protocol(PW_ACH,
|
2011-05-20 14:21:02 +00:00
|
|
|
"PW Associated Channel", "pwach");
|
|
|
|
|
proto_pw_mcw = proto_register_protocol("PW MPLS Control Word (generic/preferred)",
|
|
|
|
|
"Generic PW (with CW)", "pwmcw");
|
|
|
|
|
|
|
|
|
|
proto_register_field_array(proto_mpls, mplsf_info, array_length(mplsf_info));
|
|
|
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
|
register_dissector("mpls", dissect_mpls, proto_mpls);
|
|
|
|
|
register_dissector("mplspwcw", dissect_pw_mcw, proto_pw_mcw );
|
|
|
|
|
|
|
|
|
|
module_mpls = prefs_register_protocol( proto_mpls, NULL );
|
|
|
|
|
|
|
|
|
|
prefs_register_enum_preference(module_mpls,
|
|
|
|
|
"mplspref.payload",
|
|
|
|
|
"Default decoder for MPLS payload",
|
|
|
|
|
"Default decoder for MPLS payload",
|
|
|
|
|
&mpls_default_payload,
|
|
|
|
|
mpls_default_payload_defs,
|
|
|
|
|
FALSE );
|
2011-11-28 17:05:35 +00:00
|
|
|
}
|
2000-03-09 18:31:51 +00:00
|
|
|
|
Change the sub-dissector handoff registration routines so that the
sub-dissector table is not stored in the header_field_info struct, but
in a separate namespace. Dissector tables are now registered by name
and not by field ID. For example:
udp_dissector_table = register_dissector_table("udp.port");
Because of this different namespace, dissector tables can have names
that are not field names. This is useful for ethertype, since multiple
fields are "ethertypes".
packet-ethertype.c replaces ethertype.c (the name was changed so that it
would be named in the same fashion as all the filenames passed to make-reg-dotc)
Although it registers no protocol or field, it registers one dissector table:
ethertype_dissector_table = register_dissector_table("ethertype");
All protocols that can be called because of an ethertype field now register
that fact with dissector_add() calls.
In this way, one dissector_table services all ethertype fields
(hf_eth_type, hf_llc_type, hf_null_etype, hf_vlan_etype)
Furthermore, the code allows for names of protocols to exist in the
etype_vals, yet a dissector for that protocol doesn't exist. The name
of the dissector is printed in COL_INFO. You're welcome, Richard. :-)
svn path=/trunk/; revision=1848
2000-04-13 18:18:56 +00:00
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void
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proto_reg_handoff_mpls(void)
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{
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2011-05-20 14:21:02 +00:00
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dissector_handle_t mpls_handle;
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mpls_handle = find_dissector("mpls");
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dissector_add_uint("ethertype", ETHERTYPE_MPLS, mpls_handle);
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dissector_add_uint("ethertype", ETHERTYPE_MPLS_MULTI, mpls_handle);
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dissector_add_uint("chdlctype", ETHERTYPE_MPLS, mpls_handle);
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dissector_add_uint("chdlctype", ETHERTYPE_MPLS_MULTI, mpls_handle);
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dissector_add_uint("gre.proto", ETHERTYPE_MPLS, mpls_handle);
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dissector_add_uint("gre.proto", ETHERTYPE_MPLS_MULTI, mpls_handle);
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dissector_add_uint("ip.proto", IP_PROTO_MPLS_IN_IP, mpls_handle);
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mpls_handle = find_dissector("mplspwcw");
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dissector_add_uint( "mpls.label", LABEL_INVALID, mpls_handle );
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dissector_data = find_dissector("data");
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dissector_ipv6 = find_dissector("ipv6");
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dissector_ip = find_dissector("ip");
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dissector_bfd = find_dissector("bfd");
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dissector_pw_eth_heuristic = find_dissector("pw_eth_heuristic");
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dissector_pw_fr = find_dissector("pw_fr");
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dissector_pw_hdlc_nocw_fr = find_dissector("pw_hdlc_nocw_fr");
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dissector_pw_eth_cw = find_dissector("pw_eth_cw");
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dissector_pw_eth_nocw = find_dissector("pw_eth_nocw");
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dissector_pw_satop = find_dissector("pw_satop_mpls");
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dissector_itdm = find_dissector("itdm");
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dissector_mpls_pw_atm_n1_cw = find_dissector("mpls_pw_atm_n1_cw");
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dissector_mpls_pw_atm_n1_nocw = find_dissector("mpls_pw_atm_n1_nocw");
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dissector_mpls_pw_atm_11_aal5pdu= find_dissector("mpls_pw_atm_11_or_aal5_pdu");
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dissector_mpls_pw_atm_aal5_sdu = find_dissector("mpls_pw_atm_aal5_sdu");
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dissector_pw_cesopsn = find_dissector("pw_cesopsn_mpls");
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Change the sub-dissector handoff registration routines so that the
sub-dissector table is not stored in the header_field_info struct, but
in a separate namespace. Dissector tables are now registered by name
and not by field ID. For example:
udp_dissector_table = register_dissector_table("udp.port");
Because of this different namespace, dissector tables can have names
that are not field names. This is useful for ethertype, since multiple
fields are "ethertypes".
packet-ethertype.c replaces ethertype.c (the name was changed so that it
would be named in the same fashion as all the filenames passed to make-reg-dotc)
Although it registers no protocol or field, it registers one dissector table:
ethertype_dissector_table = register_dissector_table("ethertype");
All protocols that can be called because of an ethertype field now register
that fact with dissector_add() calls.
In this way, one dissector_table services all ethertype fields
(hf_eth_type, hf_llc_type, hf_null_etype, hf_vlan_etype)
Furthermore, the code allows for names of protocols to exist in the
etype_vals, yet a dissector for that protocol doesn't exist. The name
of the dissector is printed in COL_INFO. You're welcome, Richard. :-)
svn path=/trunk/; revision=1848
2000-04-13 18:18:56 +00:00
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}
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