forked from osmocom/wireshark
6966 lines
335 KiB
C
6966 lines
335 KiB
C
/* packet-bgp.c
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* Routines for BGP packet dissection.
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* Copyright 1999, Jun-ichiro itojun Hagino <itojun@itojun.org>
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/* Supports:
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* RFC1771 A Border Gateway Protocol 4 (BGP-4)
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* RFC1965 Autonomous System Confederations for BGP
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* RFC1997 BGP Communities Attribute
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* RFC2547 BGP/MPLS VPNs
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* RFC2796 BGP Route Reflection An alternative to full mesh IBGP
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* RFC2842 Capabilities Advertisement with BGP-4
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* RFC2858 Multiprotocol Extensions for BGP-4
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* RFC2918 Route Refresh Capability for BGP-4
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* RFC3107 Carrying Label Information in BGP-4
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* RFC4486 Subcodes for BGP Cease Notification Message
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* RFC4724 Graceful Restart Mechanism for BGP
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* RFC5512 BGP Encapsulation SAFI and the BGP Tunnel Encapsulation Attribute
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* RFC5640 Load-Balancing for Mesh Softwires
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* RFC6608 Subcodes for BGP Finite State Machine Error
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* RFC5575 Dissemination of flow specification rules
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* draft-ietf-idr-as4bytes-06
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* draft-ietf-idr-dynamic-cap-03
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* draft-ietf-idr-bgp-enhanced-route-refresh-02
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* draft-ietf-idr-bgp-ext-communities-05
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* draft-knoll-idr-qos-attribute-03
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* draft-nalawade-kapoor-tunnel-safi-05
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* draft-ietf-idr-add-paths-04 Additional-Path for BGP-4
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* http://www.iana.org/assignments/bgp-parameters/ (last updated 2012-04-26)
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* TODO:
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* Destination Preference Attribute for BGP (work in progress)
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* RFC1863 A BGP/IDRP Route Server alternative to a full mesh routing
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*/
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#include "config.h"
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#include <string.h>
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#include <glib.h>
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#include <epan/packet.h>
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#include <epan/exceptions.h>
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#include <epan/addr_and_mask.h>
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#include <epan/show_exception.h>
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#include <epan/afn.h>
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#include <epan/prefs.h>
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#include <epan/wmem/wmem.h>
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#include <epan/expert.h>
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#include <epan/etypes.h>
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#include <epan/to_str.h>
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#include <packet-ip.h>
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void proto_register_bgp(void);
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void proto_reg_handoff_bgp(void);
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/* #define MAX_STR_LEN 256 */
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/* some handy things to know */
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#define BGP_MAX_PACKET_SIZE 4096
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#define BGP_MARKER_SIZE 16 /* size of BGP marker */
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#define BGP_HEADER_SIZE 19 /* size of BGP header, including marker */
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#define BGP_MIN_OPEN_MSG_SIZE 29
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#define BGP_MIN_UPDATE_MSG_SIZE 23
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#define BGP_MIN_NOTIFICATION_MSG_SIZE 21
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#define BGP_MIN_KEEPALVE_MSG_SIZE BGP_HEADER_SIZE
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#define BGP_TCP_PORT 179
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#define BGP_ROUTE_DISTINGUISHER_SIZE 8
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/* BGP message types */
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#define BGP_OPEN 1
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#define BGP_UPDATE 2
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#define BGP_NOTIFICATION 3
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#define BGP_KEEPALIVE 4
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#define BGP_ROUTE_REFRESH 5
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#define BGP_CAPABILITY 6
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#define BGP_ROUTE_REFRESH_CISCO 0x80
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#define BGP_SIZE_OF_PATH_ATTRIBUTE 2
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/* attribute flags, from RFC1771 */
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#define BGP_ATTR_FLAG_OPTIONAL 0x80
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#define BGP_ATTR_FLAG_TRANSITIVE 0x40
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#define BGP_ATTR_FLAG_PARTIAL 0x20
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#define BGP_ATTR_FLAG_EXTENDED_LENGTH 0x10
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/* SSA flags */
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#define BGP_SSA_TRANSITIVE 0x8000
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#define BGP_SSA_TYPE 0x7FFF
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/* SSA Types */
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#define BGP_SSA_L2TPv3 1
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#define BGP_SSA_mGRE 2
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#define BGP_SSA_IPSec 3
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#define BGP_SSA_MPLS 4
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#define BGP_SSA_L2TPv3_IN_IPSec 5
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#define BGP_SSA_mGRE_IN_IPSec 6
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/* AS_PATH segment types */
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#define AS_SET 1 /* RFC1771 */
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#define AS_SEQUENCE 2 /* RFC1771 */
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#define AS_CONFED_SET 4 /* RFC1965 has the wrong values, corrected in */
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#define AS_CONFED_SEQUENCE 3 /* draft-ietf-idr-bgp-confed-rfc1965bis-01.txt */
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/* OPEN message Optional Parameter types */
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#define BGP_OPTION_AUTHENTICATION 1 /* RFC1771 */
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#define BGP_OPTION_CAPABILITY 2 /* RFC2842 */
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/* BGP capability code */
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#define BGP_CAPABILITY_RESERVED 0 /* RFC2434 */
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#define BGP_CAPABILITY_MULTIPROTOCOL 1 /* RFC2858 */
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#define BGP_CAPABILITY_ROUTE_REFRESH 2 /* RFC2918 */
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#define BGP_CAPABILITY_COOPERATIVE_ROUTE_FILTERING 3 /* draft-ietf-idr-route-filter-04.txt */
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#define BGP_CAPABILITY_GRACEFUL_RESTART 0x40 /* draft-ietf-idr-restart-05 */
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#define BGP_CAPABILITY_4_OCTET_AS_NUMBER 0x41 /* draft-ietf-idr-as4bytes-06 */
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#define BGP_CAPABILITY_DYNAMIC_CAPABILITY 0x42 /* draft-ietf-idr-dynamic-cap-03 */
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#define BGP_CAPABILITY_ADDITIONAL_PATHS 0x45 /* draft-ietf-idr-add-paths */
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#define BGP_CAPABILITY_ENHANCED_ROUTE_REFRESH 0x46 /* draft-ietf-idr-bgp-enhanced-route-refresh-02 */
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#define BGP_CAPABILITY_ORF_CISCO 0x82 /* Cisco */
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#define BGP_CAPABILITY_ROUTE_REFRESH_CISCO 0x80 /* Cisco */
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#define BGP_ORF_PREFIX_CISCO 0x80 /* Cisco */
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#define BGP_ORF_COMM_CISCO 0x81 /* Cisco */
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#define BGP_ORF_EXTCOMM_CISCO 0x82 /* Cisco */
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#define BGP_ORF_ASPATH_CISCO 0x83 /* Cisco */
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#define BGP_ORF_COMM 0x02 /* draft-ietf-idr-route-filter-06.txt */
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#define BGP_ORF_EXTCOMM 0x03 /* draft-ietf-idr-route-filter-06.txt */
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#define BGP_ORF_ASPATH 0x04 /* draft-ietf-idr-aspath-orf-02.txt */
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/* draft-ietf-idr-route-filter-06.txt */
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#define BGP_ORF_ACTION 0xc0
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#define BGP_ORF_ADD 0x00
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#define BGP_ORF_REMOVE 0x01
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#define BGP_ORF_REMOVEALL 0x02
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#define BGP_ORF_MATCH 0x20
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#define BGP_ORF_PERMIT 0x00
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#define BGP_ORF_DENY 0x01
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/* well-known communities, from RFC1997 */
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#define BGP_COMM_NO_EXPORT 0xFFFFFF01
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#define BGP_COMM_NO_ADVERTISE 0xFFFFFF02
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#define BGP_COMM_NO_EXPORT_SUBCONFED 0xFFFFFF03
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#define FOURHEX0 0x00000000
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#define FOURHEXF 0xFFFF0000
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/* attribute types */
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#define BGPTYPE_ORIGIN 1 /* RFC1771 */
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#define BGPTYPE_AS_PATH 2 /* RFC1771 */
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#define BGPTYPE_NEXT_HOP 3 /* RFC1771 */
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#define BGPTYPE_MULTI_EXIT_DISC 4 /* RFC1771 */
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#define BGPTYPE_LOCAL_PREF 5 /* RFC1771 */
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#define BGPTYPE_ATOMIC_AGGREGATE 6 /* RFC1771 */
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#define BGPTYPE_AGGREGATOR 7 /* RFC1771 */
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#define BGPTYPE_COMMUNITIES 8 /* RFC1997 */
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#define BGPTYPE_ORIGINATOR_ID 9 /* RFC2796 */
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#define BGPTYPE_CLUSTER_LIST 10 /* RFC2796 */
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#define BGPTYPE_DPA 11 /* work in progress */
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#define BGPTYPE_ADVERTISER 12 /* RFC1863 */
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#define BGPTYPE_RCID_PATH 13 /* RFC1863 */
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#define BGPTYPE_MP_REACH_NLRI 14 /* RFC2858 */
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#define BGPTYPE_MP_UNREACH_NLRI 15 /* RFC2858 */
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#define BGPTYPE_EXTENDED_COMMUNITY 16 /* Draft Ramachandra */
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#define BGPTYPE_AS4_PATH 17 /* RFC 6793 */
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#define BGPTYPE_AS4_AGGREGATOR 18 /* RFC 6793 */
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#define BGPTYPE_SAFI_SPECIFIC_ATTR 19 /* draft-kapoor-nalawade-idr-bgp-ssa-00.txt */
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#define BGPTYPE_TUNNEL_ENCAPS_ATTR 23 /* RFC5512 */
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#define BGPTYPE_LINK_STATE_ATTR 99 /* FIXME: draft-ietf-idr-ls-distribution-03 temp. value no IANA assignee yet */
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/* NLRI type as define in BGP flow spec RFC */
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#define BGPNLRI_FSPEC_DST_PFIX 1 /* RFC 5575 */
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#define BGPNLRI_FSPEC_SRC_PFIX 2 /* RFC 5575 */
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#define BGPNLRI_FSPEC_IP_PROTO 3 /* RFC 5575 */
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#define BGPNLRI_FSPEC_PORT 4 /* RFC 5575 */
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#define BGPNLRI_FSPEC_DST_PORT 5 /* RFC 5575 */
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#define BGPNLRI_FSPEC_SRC_PORT 6 /* RFC 5575 */
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#define BGPNLRI_FSPEC_ICMP_TP 7 /* RFC 5575 */
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#define BGPNLRI_FSPEC_ICMP_CD 8 /* RFC 5575 */
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#define BGPNLRI_FSPEC_TCP_FLAGS 9 /* RFC 5575 */
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#define BGPNLRI_FSPEC_PCK_LEN 10 /* RFC 5575 */
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#define BGPNLRI_FSPEC_DSCP 11 /* RFC 5575 */
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#define BGPNLRI_FSPEC_FRAGMENT 12 /* RFC 5575 */
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/* BGP flow spec NLRI operator bitmask */
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#define BGPNLRI_FSPEC_END_OF_LST 0x80
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#define BGPNLRI_FSPEC_AND_BIT 0x40
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#define BGPNLRI_FSPEC_VAL_LEN 0x30
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#define BGPNLRI_FSPEC_UNUSED_BIT4 0x08
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#define BGPNLRI_FSPEC_UNUSED_BIT5 0x04
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#define BGPNLRI_FSPEC_LESS_THAN 0x04
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#define BGPNLRI_FSPEC_GREATER_THAN 0x02
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#define BGPNLRI_FSPEC_EQUAL 0x01
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#define BGPNLRI_FSPEC_TCPF_NOTBIT 0x02
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#define BGPNLRI_FSPEC_TCPF_MATCHBIT 0x01
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#define BGPNLRI_FSPEC_DSCP_BITMASK 0xFC
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/* BGP flow spec specific filter value: TCP flags, Packet fragment ... */
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#define BGPNLRI_FSPEC_TH_FIN 0x01
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#define BGPNLRI_FSPEC_TH_SYN 0x02
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#define BGPNLRI_FSPEC_TH_RST 0x04
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#define BGPNLRI_FSPEC_TH_PUSH 0x08
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#define BGPNLRI_FSPEC_TH_ACK 0x10
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#define BGPNLRI_FSPEC_TH_URG 0x20
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#define BGPNLRI_FSPEC_TH_ECN 0x40
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#define BGPNLRI_FSPEC_TH_CWR 0x80
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#define BGPNLRI_FSPEC_FG_DF 0x01
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#define BGPNLRI_FSPEC_FG_ISF 0x02
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#define BGPNLRI_FSPEC_FG_FF 0x04
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#define BGPNLRI_FSPEC_FG_LF 0x08
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/* Extended community type */
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/* according to IANA's number assignment at: http://www.iana.org/assignments/bgp-extended-communities */
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#define BGP_EXT_COM_QOS_MARK_T 0x04 /* QoS Marking transitive attribute of regular type (8bit) */
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#define BGP_EXT_COM_QOS_MARK_NT 0x44 /* QoS Marking non-transitive attribute of regular type (8bit) */
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/* Format Type(1byte):Flags(1byte):QoS Set(1byte):Tec. Type(1byte): */
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/* Marking O(2bytes):Marking A(1byte):Proc.Cnt(1byte) */
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#define BGP_EXT_COM_COS_CAP_T 0x05 /* CoS Capability - Format Type(1byte):Flags(1byte):remaining '0..0' */
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/* draft-ietf-idr-bgp-ext-communities */
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#define BGP_EXT_COM_RT_0 0x0002 /* Route Target,Format AS(2bytes):AN(4bytes) */
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#define BGP_EXT_COM_RT_1 0x0102 /* Route Target,Format IP address:AN(2bytes) */
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#define BGP_EXT_COM_RT_2 0x0202 /* Route Target,Format AS(4bytes):AN(2bytes) */
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#define BGP_EXT_COM_RO_0 0x0003 /* Route Origin,Format AS(2bytes):AN(4bytes) */
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#define BGP_EXT_COM_RO_1 0x0103 /* Route Origin,Format IP address:AN(2bytes) */
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#define BGP_EXT_COM_RO_2 0x0203 /* Route Origin,Format AS(2bytes):AN(4bytes) */
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#define BGP_EXT_COM_LINKBAND ((BGP_ATTR_FLAG_TRANSITIVE << 8) | 0x0004)
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/* Link Bandwidth,Format AS(2bytes):
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* Bandwidth(4bytes) */
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/* -2 version of the draft */
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#define BGP_EXT_COM_VPN_ORIGIN 0x0005 /* OSPF Domin ID / VPN of Origin */
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/* draft-rosen-vpns-ospf-bgp-mpls */
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#define BGP_EXT_COM_OSPF_RTYPE 0x8000 /* OSPF Route Type,Format Area(4B):RouteType(1B):Options(1B) */
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#define BGP_EXT_COM_OSPF_RID 0x8001 /* OSPF Router ID,Format RouterID(4B):Unused(2B) */
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#define BGP_EXT_COM_L2INFO 0x800a /* draft-kompella-ppvpn-l2vpn */
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#define BGP_EXT_COM_FLOW_RATE 0x8006 /* RFC 5575 flow spec ext com rate limit */
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#define BGP_EXT_COM_FLOW_ACT 0x8007 /* RFC 5575 flow Spec ext com traffic action */
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#define BGP_EXT_COM_FLOW_RDIR 0x8008 /* RFC 5575 flow spec ext com redirect action */
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#define BGP_EXT_COM_FLOW_MARK 0x8009 /* RFC 5575 flow spec ext com mark action */
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#define BGP_EXT_COM_FLOW_NH 0x0800 /* draft-simpson-redirect-02 */
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/* extended community option flow flec action bit S and T */
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#define BGP_EXT_COM_FSPEC_ACT_S 0x02
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#define BGP_EXT_COM_FSPEC_ACT_T 0x01
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/* extended community l2vpn flags */
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#define BGP_EXT_COM_L2_FLAG_D 0x80
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#define BGP_EXT_COM_L2_FLAG_Z1 0x40
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#define BGP_EXT_COM_L2_FLAG_F 0x20
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#define BGP_EXT_COM_L2_FLAG_Z345 0x1c
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#define BGP_EXT_COM_L2_FLAG_C 0x02
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#define BGP_EXT_COM_L2_FLAG_S 0x01
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/* Extended community QoS Marking technology type */
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#define QOS_TECH_TYPE_DSCP 0x00 /* DiffServ enabled IP (DSCP encoding) */
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#define QOS_TECH_TYPE_802_1q 0x01 /* Ethernet using 802.1q priority tag */
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#define QOS_TECH_TYPE_E_LSP 0x02 /* MPLS using E-LSP */
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#define QOS_TECH_TYPE_VC 0x03 /* Virtual Channel (VC) encoding using separate channels for */
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/* QoS forwarding / one channel per class (e.g. ATM VCs, FR */
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/* VCs, MPLS L-LSPs) */
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#define QOS_TECH_TYPE_GMPLS_TIME 0x04 /* GMPLS - time slot encoding */
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#define QOS_TECH_TYPE_GMPLS_LAMBDA 0x05 /* GMPLS - lambda encoding */
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#define QOS_TECH_TYPE_GMPLS_FIBRE 0x06 /* GMPLS - fibre encoding */
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/* OSPF codes for BGP_EXT_COM_OSPF_RTYPE draft-rosen-vpns-ospf-bgp-mpls */
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#define BGP_OSPF_RTYPE_RTR 1 /* OSPF Router LSA */
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#define BGP_OSPF_RTYPE_NET 2 /* OSPF Network LSA */
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#define BGP_OSPF_RTYPE_SUM 3 /* OSPF Summary LSA */
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#define BGP_OSPF_RTYPE_EXT 5 /* OSPF External LSA, note that ASBR doesn't apply to MPLS-VPN */
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#define BGP_OSPF_RTYPE_NSSA 7 /* OSPF NSSA External*/
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#define BGP_OSPF_RTYPE_SHAM 129 /* OSPF-MPLS-VPN Sham link */
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#define BGP_OSPF_RTYPE_METRIC_TYPE 0x1 /* LSB of RTYPE Options Field */
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/* Extended community & Route dinstinguisher formats */
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#define FORMAT_AS2_LOC 0x00 /* Format AS(2bytes):AN(4bytes) */
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#define FORMAT_IP_LOC 0x01 /* Format IP address:AN(2bytes) */
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#define FORMAT_AS4_LOC 0x02 /* Format AS(4bytes):AN(2bytes) */
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/* RFC 2858 subsequent address family numbers */
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#define SAFNUM_UNICAST 1
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#define SAFNUM_MULCAST 2
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#define SAFNUM_UNIMULC 3
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#define SAFNUM_MPLS_LABEL 4 /* rfc3107 */
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#define SAFNUM_MCAST_VPN 5 /* draft-ietf-l3vpn-2547bis-mcast-bgp-08.txt */
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#define SAFNUM_ENCAPSULATION 7 /* rfc5512 */
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#define SAFNUM_TUNNEL 64 /* draft-nalawade-kapoor-tunnel-safi-02.txt */
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#define SAFNUM_VPLS 65
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#define SAFNUM_MDT 66 /* rfc6037 */
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#define SAFNUM_LINK_STATE 71 /* draft-ietf-idr-ls-distribution */
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#define SAFNUM_LAB_VPNUNICAST 128 /* Draft-rosen-rfc2547bis-03 */
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#define SAFNUM_LAB_VPNMULCAST 129
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#define SAFNUM_LAB_VPNUNIMULC 130
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#define SAFNUM_ROUTE_TARGET 132 /* RFC 4684 Constrained Route Distribution for BGP/MPLS IP VPN */
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#define SAFNUM_FSPEC_RULE 133 /* RFC 5575 BGP flow spec SAFI */
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#define SAFNUM_FSPEC_VPN_RULE 134 /* RFC 5575 BGP flow spec SAFI VPN */
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/* BGP Additional Paths Capability */
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#define BGP_ADDPATH_RECEIVE 0x01
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#define BGP_ADDPATH_SEND 0x02
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/* mcast-vpn route types draft-ietf-l3vpn-2547bis-mcast-bgp-08.txt */
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#define MCAST_VPN_RTYPE_INTRA_AS_IPMSI_AD 1
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#define MCAST_VPN_RTYPE_INTER_AS_IPMSI_AD 2
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#define MCAST_VPN_RTYPE_SPMSI_AD 3
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#define MCAST_VPN_RTYPE_LEAF_AD 4
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#define MCAST_VPN_RTYPE_SOURCE_ACTIVE_AD 5
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#define MCAST_VPN_RTYPE_SHARED_TREE_JOIN 6
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#define MCAST_VPN_RTYPE_SOURCE_TREE_JOIN 7
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/* RFC 5512 Tunnel Types */
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#define TUNNEL_TYPE_L2TP_OVER_IP 1
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#define TUNNEL_TYPE_GRE 2
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#define TUNNEL_TYPE_IP_IN_IP 7
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/* RFC 5512/5640 Sub-TLV Types */
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#define TUNNEL_SUBTLV_ENCAPSULATION 1
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#define TUNNEL_SUBTLV_PROTO_TYPE 2
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#define TUNNEL_SUBTLV_COLOR 4
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#define TUNNEL_SUBTLV_LOAD_BALANCE 5
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/* Link-State NLRI types */
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#define LINK_STATE_NODE_NLRI 1
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#define LINK_STATE_LINK_NLRI 2
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#define LINK_STATE_IPV4_TOPOLOGY_PREFIX_NLRI 3
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#define LINK_STATE_IPV6_TOPOLOGY_PREFIX_NLRI 4
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/* Link-State NLRI Protocol-ID values */
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#define BGP_LS_NLRI_PROTO_ID_UNKNOWN 0
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#define BGP_LS_NLRI_PROTO_ID_IS_IS_LEVEL_1 1
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#define BGP_LS_NLRI_PROTO_ID_IS_IS_LEVEL_2 2
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#define BGP_LS_NLRI_PROTO_ID_OSPF 3
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#define BGP_LS_NLRI_PROTO_ID_DIRECT 4
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#define BGP_LS_NLRI_PROTO_ID_STATIC 5
|
|
|
|
/* Link-State routing universes */
|
|
#define BGP_LS_NLRI_ROUTING_UNIVERSE_LEVEL_3 0
|
|
#define BGP_LS_NLRI_ROUTING_UNIVERSE_LEVEL_1 1
|
|
|
|
#define BGP_LS_PREFIX_OSPF_ROUTE_TYPE_UNKNOWN 0
|
|
#define BGP_LS_PREFIX_OSPF_ROUTE_TYPE_INTRA_AREA 1
|
|
#define BGP_LS_PREFIX_OSPF_ROUTE_TYPE_INTER_AREA 2
|
|
#define BGP_LS_PREFIX_OSPF_ROUTE_TYPE_EXTERNAL_1 3
|
|
#define BGP_LS_PREFIX_OSPF_ROUTE_TYPE_EXTERNAL_2 4
|
|
#define BGP_LS_PREFIX_OSPF_ROUTE_TYPE_NSSA_1 5
|
|
#define BGP_LS_PREFIX_OSPF_ROUTE_TYPE_NSSA_2 6
|
|
|
|
/* draft-ietf-idr-ls-distribution-03 */
|
|
#define BGP_NLRI_TLV_LOCAL_NODE_DESCRIPTORS 256
|
|
#define BGP_NLRI_TLV_REMOTE_NODE_DESCRIPTORS 257
|
|
#define BGP_NLRI_TLV_LINK_LOCAL_REMOTE_IDENTIFIERS 258
|
|
#define BGP_NLRI_TLV_IPV4_INTERFACE_ADDRESS 259
|
|
#define BGP_NLRI_TLV_IPV4_NEIGHBOR_ADDRESS 260
|
|
#define BGP_NLRI_TLV_IPV6_INTERFACE_ADDRESS 261
|
|
#define BGP_NLRI_TLV_IPV6_NEIGHBOR_ADDRESS 262
|
|
#define BGP_NLRI_TLV_MULTI_TOPOLOGY_ID 263
|
|
#define BGP_NLRI_TLV_OSPF_ROUTE_TYPE 264
|
|
#define BGP_NLRI_TLV_IP_REACHABILITY_INFORMATION 265
|
|
|
|
#define BGP_NLRI_TLV_AUTONOMOUS_SYSTEM 512
|
|
#define BGP_NLRI_TLV_BGP_LS_IDENTIFIER 513
|
|
#define BGP_NLRI_TLV_AREA_ID 514
|
|
#define BGP_NLRI_TLV_IGP_ROUTER_ID 515
|
|
|
|
#define BGP_NLRI_TLV_NODE_FLAG_BITS 1024
|
|
#define BGP_NLRI_TLV_OPAQUE_NODE_PROPERTIES 1025
|
|
#define BGP_NLRI_TLV_NODE_NAME 1026
|
|
#define BGP_NLRI_TLV_IS_IS_AREA_IDENTIFIER 1027
|
|
#define BGP_NLRI_TLV_IPV4_ROUTER_ID_OF_LOCAL_NODE 1028
|
|
#define BGP_NLRI_TLV_IPV6_ROUTER_ID_OF_LOCAL_NODE 1029
|
|
#define BGP_NLRI_TLV_IPV4_ROUTER_ID_OF_REMOTE_NODE 1030
|
|
#define BGP_NLRI_TLV_IPV6_ROUTER_ID_OF_REMOTE_NODE 1031
|
|
|
|
#define BGP_NLRI_TLV_ADMINISTRATIVE_GROUP_COLOR 1088
|
|
#define BGP_NLRI_TLV_MAX_LINK_BANDWIDTH 1089
|
|
#define BGP_NLRI_TLV_MAX_RESERVABLE_LINK_BANDWIDTH 1090
|
|
#define BGP_NLRI_TLV_UNRESERVED_BANDWIDTH 1091
|
|
#define BGP_NLRI_TLV_TE_DEFAULT_METRIC 1092
|
|
#define BGP_NLRI_TLV_LINK_PROTECTION_TYPE 1093
|
|
#define BGP_NLRI_TLV_MPLS_PROTOCOL_MASK 1094
|
|
#define BGP_NLRI_TLV_METRIC 1095
|
|
#define BGP_NLRI_TLV_SHARED_RISK_LINK_GROUP 1096
|
|
#define BGP_NLRI_TLV_OPAQUE_LINK_ATTRIBUTE 1097
|
|
#define BGP_NLRI_TLV_LINK_NAME_ATTRIBUTE 1098
|
|
|
|
#define BGP_NLRI_TLV_IGP_FLAGS 1152
|
|
#define BGP_NLRI_TLV_ROUTE_TAG 1153
|
|
#define BGP_NLRI_TLV_EXTENDED_TAG 1154
|
|
#define BGP_NLRI_TLV_PREFIX_METRIC 1155
|
|
#define BGP_NLRI_TLV_OSPF_FORWARDING_ADDRESS 1156
|
|
#define BGP_NLRI_TLV_OPAQUE_PREFIX_ATTRIBUTE 1157
|
|
|
|
|
|
/* Link-State NLRI TLV lengths */
|
|
#define BGP_NLRI_TLV_LEN_AUTONOMOUS_SYSTEM 4
|
|
#define BGP_NLRI_TLV_LEN_BGP_LS_IDENTIFIER 4
|
|
#define BGP_NLRI_TLV_LEN_AREA_ID 4
|
|
#define BGP_NLRI_TLV_LEN_IPV4_ROUTER_ID 4
|
|
#define BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID 16
|
|
#define BGP_NLRI_TLV_LEN_IPV4_ROUTER_ID_OF_LOCAL_NODE BGP_NLRI_TLV_LEN_IPV4_ROUTER_ID
|
|
#define BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID_OF_LOCAL_NODE BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID
|
|
#define BGP_NLRI_TLV_LEN_IPV4_ROUTER_ID_OF_REMOTE_NODE BGP_NLRI_TLV_LEN_IPV4_ROUTER_ID
|
|
#define BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID_OF_REMOTE_NODE BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID
|
|
#define BGP_NLRI_TLV_LEN_LINK_LOCAL_REMOTE_IDENTIFIERS 8
|
|
#define BGP_NLRI_TLV_LEN_IPV4_INTERFACE_ADDRESS 4
|
|
#define BGP_NLRI_TLV_LEN_IPV4_NEIGHBOR_ADDRESS 4
|
|
#define BGP_NLRI_TLV_LEN_IPV6_INTERFACE_ADDRESS 16
|
|
#define BGP_NLRI_TLV_LEN_IPV6_NEIGHBOR_ADDRESS 16
|
|
#define BGP_NLRI_TLV_LEN_MULTI_TOPOLOGY_ID 2
|
|
#define BGP_NLRI_TLV_LEN_ADMINISTRATIVE_GROUP_COLOR 4
|
|
#define BGP_NLRI_TLV_LEN_MAX_LINK_BANDWIDTH 4
|
|
#define BGP_NLRI_TLV_LEN_MAX_RESERVABLE_LINK_BANDWIDTH 4
|
|
#define BGP_NLRI_TLV_LEN_UNRESERVED_BANDWIDTH 32
|
|
#define BGP_NLRI_TLV_LEN_TE_DEFAULT_METRIC 3
|
|
#define BGP_NLRI_TLV_LEN_LINK_PROTECTION_TYPE 2
|
|
#define BGP_NLRI_TLV_LEN_MPLS_PROTOCOL_MASK 1
|
|
#define BGP_NLRI_TLV_LEN_METRIC 3
|
|
#define BGP_NLRI_TLV_LEN_IGP_FLAGS 1
|
|
#define BGP_NLRI_TLV_LEN_PREFIX_METRIC 4
|
|
#define BGP_NLRI_TLV_LEN_AREA_ID 4
|
|
#define BGP_NLRI_TLV_LEN_NODE_FLAG_BITS 1
|
|
|
|
|
|
#ifndef offsetof
|
|
#define offsetof(type, member) ((size_t)(&((type *)0)->member))
|
|
#endif
|
|
|
|
|
|
static const value_string bgptypevals[] = {
|
|
{ BGP_OPEN, "OPEN Message" },
|
|
{ BGP_UPDATE, "UPDATE Message" },
|
|
{ BGP_NOTIFICATION, "NOTIFICATION Message" },
|
|
{ BGP_KEEPALIVE, "KEEPALIVE Message" },
|
|
{ BGP_ROUTE_REFRESH, "ROUTE-REFRESH Message" },
|
|
{ BGP_CAPABILITY, "CAPABILITY Message" },
|
|
{ BGP_ROUTE_REFRESH_CISCO, "Cisco ROUTE-REFRESH Message" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
#define BGP_MAJOR_ERROR_MSG_HDR 1
|
|
#define BGP_MAJOR_ERROR_OPEN_MSG 2
|
|
#define BGP_MAJOR_ERROR_UPDATE_MSG 3
|
|
#define BGP_MAJOR_ERROR_HT_EXPIRED 4
|
|
#define BGP_MAJOR_ERROR_STATE_MACHINE 5
|
|
#define BGP_MAJOR_ERROR_CEASE 6
|
|
#define BGP_MAJOR_ERROR_CAP_MSG 7
|
|
|
|
static const value_string bgpnotify_major[] = {
|
|
{ BGP_MAJOR_ERROR_MSG_HDR, "Message Header Error" },
|
|
{ BGP_MAJOR_ERROR_OPEN_MSG, "OPEN Message Error" },
|
|
{ BGP_MAJOR_ERROR_UPDATE_MSG, "UPDATE Message Error" },
|
|
{ BGP_MAJOR_ERROR_HT_EXPIRED, "Hold Timer Expired" },
|
|
{ BGP_MAJOR_ERROR_STATE_MACHINE, "Finite State Machine Error" },
|
|
{ BGP_MAJOR_ERROR_CEASE, "Cease" },
|
|
{ BGP_MAJOR_ERROR_CAP_MSG, "CAPABILITY Message Error" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string bgpnotify_minor_msg_hdr[] = {
|
|
{ 1, "Connection Not Synchronized" },
|
|
{ 2, "Bad Message Length" },
|
|
{ 3, "Bad Message Type" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string bgpnotify_minor_open_msg[] = {
|
|
{ 1, "Unsupported Version Number" },
|
|
{ 2, "Bad Peer AS" },
|
|
{ 3, "Bad BGP Identifier" },
|
|
{ 4, "Unsupported Optional Parameter" },
|
|
{ 5, "Authentication Failure [Deprecated]" },
|
|
{ 6, "Unacceptable Hold Time" },
|
|
{ 7, "Unsupported Capability" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string bgpnotify_minor_update_msg[] = {
|
|
{ 1, "Malformed Attribute List" },
|
|
{ 2, "Unrecognized Well-known Attribute" },
|
|
{ 3, "Missing Well-known Attribute" },
|
|
{ 4, "Attribute Flags Error" },
|
|
{ 5, "Attribute Length Error" },
|
|
{ 6, "Invalid ORIGIN Attribute" },
|
|
{ 7, "AS Routing Loop [Deprecated]" },
|
|
{ 8, "Invalid NEXT_HOP Attribute" },
|
|
{ 9, "Optional Attribute Error" },
|
|
{ 10, "Invalid Network Field" },
|
|
{ 11, "Malformed AS_PATH" },
|
|
{ 0, NULL }
|
|
};
|
|
/* RFC6608 Subcodes for BGP Finite State Machine Error */
|
|
static const value_string bgpnotify_minor_state_machine[] = {
|
|
{ 1, "Receive Unexpected Message in OpenSent State" },
|
|
{ 2, "Receive Unexpected Message in OpenConfirm State" },
|
|
{ 3, "Receive Unexpected Message in Established State" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/* RFC4486 Subcodes for BGP Cease Notification Message */
|
|
static const value_string bgpnotify_minor_cease[] = {
|
|
{ 1, "Maximum Number of Prefixes Reached"},
|
|
{ 2, "Administratively Shutdown"},
|
|
{ 3, "Peer De-configured"},
|
|
{ 4, "Administratively Reset"},
|
|
{ 5, "Connection Rejected"},
|
|
{ 6, "Other Configuration Change"},
|
|
{ 7, "Connection Collision Resolution"},
|
|
{ 8, "Out of Resources"},
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string bgpnotify_minor_cap_msg[] = {
|
|
{ 1, "Invalid Action Value" },
|
|
{ 2, "Invalid Capability Length" },
|
|
{ 3, "Malformed Capability Value" },
|
|
{ 4, "Unsupported Capability Code" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string bgpattr_origin[] = {
|
|
{ 0, "IGP" },
|
|
{ 1, "EGP" },
|
|
{ 2, "INCOMPLETE" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string bgp_open_opt_vals[] = {
|
|
{ BGP_OPTION_AUTHENTICATION, "Authentication" },
|
|
{ BGP_OPTION_CAPABILITY, "Capability" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string as_segment_type[] = {
|
|
{ 1, "AS_SET" },
|
|
{ 2, "AS_SEQUENCE" },
|
|
/* RFC1965 has the wrong values, corrected in */
|
|
/* draft-ietf-idr-bgp-confed-rfc1965bis-01.txt */
|
|
{ 4, "AS_CONFED_SET" },
|
|
{ 3, "AS_CONFED_SEQUENCE" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string bgpattr_type[] = {
|
|
{ BGPTYPE_ORIGIN, "ORIGIN" },
|
|
{ BGPTYPE_AS_PATH, "AS_PATH" },
|
|
{ BGPTYPE_NEXT_HOP, "NEXT_HOP" },
|
|
{ BGPTYPE_MULTI_EXIT_DISC, "MULTI_EXIT_DISC" },
|
|
{ BGPTYPE_LOCAL_PREF, "LOCAL_PREF" },
|
|
{ BGPTYPE_ATOMIC_AGGREGATE, "ATOMIC_AGGREGATE" },
|
|
{ BGPTYPE_AGGREGATOR, "AGGREGATOR" },
|
|
{ BGPTYPE_COMMUNITIES, "COMMUNITIES" },
|
|
{ BGPTYPE_ORIGINATOR_ID, "ORIGINATOR_ID" },
|
|
{ BGPTYPE_CLUSTER_LIST, "CLUSTER_LIST" },
|
|
{ BGPTYPE_MP_REACH_NLRI, "MP_REACH_NLRI" },
|
|
{ BGPTYPE_MP_UNREACH_NLRI, "MP_UNREACH_NLRI" },
|
|
{ BGPTYPE_EXTENDED_COMMUNITY, "EXTENDED_COMMUNITIES" },
|
|
{ BGPTYPE_AS4_PATH, "AS4_PATH" },
|
|
{ BGPTYPE_AS4_AGGREGATOR, "AS4_AGGREGATOR" },
|
|
{ BGPTYPE_SAFI_SPECIFIC_ATTR, "SAFI_SPECIFIC_ATTRIBUTE" },
|
|
{ BGPTYPE_TUNNEL_ENCAPS_ATTR, "TUNNEL_ENCAPSULATION_ATTRIBUTE" },
|
|
{ BGPTYPE_LINK_STATE_ATTR, "LINK_STATE" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string tunnel_type[] = {
|
|
{ TUNNEL_TYPE_L2TP_OVER_IP, "L2TP_OVER_IP" },
|
|
{ TUNNEL_TYPE_GRE, "GRE" },
|
|
{ TUNNEL_TYPE_IP_IN_IP, "IP_IN_IP" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string subtlv_type[] = {
|
|
{ TUNNEL_SUBTLV_ENCAPSULATION, "ENCAPSULATION" },
|
|
{ TUNNEL_SUBTLV_PROTO_TYPE, "PROTOCOL_TYPE" },
|
|
{ TUNNEL_SUBTLV_COLOR, "COLOR" },
|
|
{ TUNNEL_SUBTLV_LOAD_BALANCE, "LOAD_BALANCE" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string bgpext_com8_type[] = {
|
|
{ BGP_EXT_COM_QOS_MARK_T, "QoS Marking - transitive" },
|
|
{ BGP_EXT_COM_QOS_MARK_NT, "QoS Marking - non-transitive" },
|
|
{ BGP_EXT_COM_COS_CAP_T, "CoS Capability - transitive" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string bgpext_com_type[] = {
|
|
{ BGP_EXT_COM_RT_0, "two-octet AS specific Route Target" },
|
|
{ BGP_EXT_COM_RT_1, "IPv4 address specific Route Target" },
|
|
{ BGP_EXT_COM_RT_2, "four-octet AS specific Route Target" },
|
|
{ BGP_EXT_COM_RO_0, "two-octet AS specific Route Origin" },
|
|
{ BGP_EXT_COM_RO_1, "IPv4 address specific Route Origin" },
|
|
{ BGP_EXT_COM_RO_2, "four-octet AS specific Route Origin" },
|
|
{ BGP_EXT_COM_LINKBAND, "Link Bandwidth" },
|
|
{ BGP_EXT_COM_VPN_ORIGIN, "OSPF Domain" },
|
|
{ BGP_EXT_COM_OSPF_RTYPE, "OSPF Route Type" },
|
|
{ BGP_EXT_COM_OSPF_RID, "OSPF Router ID" },
|
|
{ BGP_EXT_COM_L2INFO, "Layer 2 Information" },
|
|
{ BGP_EXT_COM_FLOW_ACT, "Flow spec traffic action" },
|
|
{ BGP_EXT_COM_FLOW_MARK, "FLow spec traffic marling" },
|
|
{ BGP_EXT_COM_FLOW_RATE, "Flow spec traffic rate" },
|
|
{ BGP_EXT_COM_FLOW_RDIR, "Flow spec traffic redirect" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string flow_spec_op_len_val[] = {
|
|
{ 0, "1 byte: 1 <<" },
|
|
{ 1, "2 bytes: 1 <<" },
|
|
{ 2, "4 bytes: 1 <<" },
|
|
{ 3, "8 bytes: 1 <<" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string qos_tech_type[] = {
|
|
{ QOS_TECH_TYPE_DSCP, "DiffServ enabled IP (DSCP encoding)" },
|
|
{ QOS_TECH_TYPE_802_1q, "Ethernet using 802.1q priority tag" },
|
|
{ QOS_TECH_TYPE_E_LSP, "MPLS using E-LSP" },
|
|
{ QOS_TECH_TYPE_VC, "Virtual Channel (VC) encoding" },
|
|
{ QOS_TECH_TYPE_GMPLS_TIME, "GMPLS - time slot encoding" },
|
|
{ QOS_TECH_TYPE_GMPLS_LAMBDA, "GMPLS - lambda encoding" },
|
|
{ QOS_TECH_TYPE_GMPLS_FIBRE, "GMPLS - fibre encoding" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string bgp_ssa_type[] = {
|
|
{ BGP_SSA_L2TPv3 , "L2TPv3 Tunnel" },
|
|
{ BGP_SSA_mGRE , "mGRE Tunnel" },
|
|
{ BGP_SSA_IPSec , "IPSec Tunnel" },
|
|
{ BGP_SSA_MPLS , "MPLS Tunnel" },
|
|
{ BGP_SSA_L2TPv3_IN_IPSec , "L2TPv3 in IPSec Tunnel" },
|
|
{ BGP_SSA_mGRE_IN_IPSec , "mGRE in IPSec Tunnel" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string bgp_l2vpn_encaps[] = {
|
|
{ 0, "Reserved"},
|
|
{ 1, "Frame Relay"},
|
|
{ 2, "ATM AAL5 SDU VCC transport"},
|
|
{ 3, "ATM transparent cell transport"},
|
|
{ 4, "Ethernet (VLAN) Tagged mode"},
|
|
{ 5, "Ethernet raw mode"},
|
|
{ 6, "Cisco-HDLC"},
|
|
{ 7, "PPP"},
|
|
{ 8, "SONET/SDH CES"},
|
|
{ 9, "ATM n-to-one VCC cell transport"},
|
|
{ 10, "ATM n-to-one VPC cell transport"},
|
|
{ 11, "IP layer 2 transport"},
|
|
{ 15, "Frame relay port mode"},
|
|
{ 17, "Structure agnostic E1 over packet"},
|
|
{ 18, "Structure agnostic T1 over packet"},
|
|
{ 19, "VPLS"},
|
|
{ 20, "Structure agnostic T3 over packet"},
|
|
{ 21, "Nx64kbit/s Basic Service using Structure-aware"},
|
|
{ 25, "Frame Relay DLCI"},
|
|
{ 40, "Structure agnostic E3 over packet"},
|
|
{ 41, "Octet-aligned playload for structure-agnostic DS1 circuits"},
|
|
{ 42, "E1 Nx64kbit/s with CAS using Structure-aware"},
|
|
{ 43, "DS1 (ESF) Nx64kbit/s with CAS using Structure-aware"},
|
|
{ 44, "DS1 (SF) Nx64kbit/s with CAS using Structure-aware"},
|
|
{ 64, "IP-interworking"},
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string bgpext_ospf_rtype[] = {
|
|
{ BGP_OSPF_RTYPE_RTR, "Router" },
|
|
{ BGP_OSPF_RTYPE_NET, "Network" },
|
|
{ BGP_OSPF_RTYPE_SUM, "Summary" },
|
|
{ BGP_OSPF_RTYPE_EXT, "External" },
|
|
{ BGP_OSPF_RTYPE_NSSA,"NSSA External" },
|
|
{ BGP_OSPF_RTYPE_SHAM,"MPLS-VPN Sham" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/* Subsequent address family identifier, RFC2858 */
|
|
static const value_string bgpattr_nlri_safi[] = {
|
|
{ 0, "Reserved" },
|
|
{ SAFNUM_UNICAST, "Unicast" },
|
|
{ SAFNUM_MULCAST, "Multicast" },
|
|
{ SAFNUM_UNIMULC, "Unicast+Multicast" },
|
|
{ SAFNUM_MPLS_LABEL, "Labeled Unicast"},
|
|
{ SAFNUM_MCAST_VPN, "MCAST-VPN"},
|
|
{ SAFNUM_ENCAPSULATION, "Encapsulation"},
|
|
{ SAFNUM_TUNNEL, "Tunnel"},
|
|
{ SAFNUM_VPLS, "VPLS"},
|
|
{ SAFNUM_LINK_STATE, "Link State"},
|
|
{ SAFNUM_LAB_VPNUNICAST, "Labeled VPN Unicast" }, /* draft-rosen-rfc2547bis-03 */
|
|
{ SAFNUM_LAB_VPNMULCAST, "Labeled VPN Multicast" },
|
|
{ SAFNUM_LAB_VPNUNIMULC, "Labeled VPN Unicast+Multicast" },
|
|
{ SAFNUM_ROUTE_TARGET, "Route Target Filter" },
|
|
{ SAFNUM_FSPEC_RULE, "Flow Spec Filter" },
|
|
{ SAFNUM_FSPEC_VPN_RULE, "Flow Spec Filter VPN" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/* ORF Type, draft-ietf-idr-route-filter-04.txt */
|
|
static const value_string orf_type_vals[] = {
|
|
{ 2, "Communities ORF-Type" },
|
|
{ 3, "Extended Communities ORF-Type" },
|
|
{ 128, "Cisco PrefixList ORF-Type" },
|
|
{ 129, "Cisco CommunityList ORF-Type" },
|
|
{ 130, "Cisco Extended CommunityList ORF-Type" },
|
|
{ 131, "Cisco AsPathList ORF-Type" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/* ORF Send/Receive, draft-ietf-idr-route-filter-04.txt */
|
|
static const value_string orf_send_recv_vals[] = {
|
|
{ 1, "Receive" },
|
|
{ 2, "Send" },
|
|
{ 3, "Both" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/* ORF Send/Receive, draft-ietf-idr-route-filter-04.txt */
|
|
static const value_string orf_when_vals[] = {
|
|
{ 1, "Immediate" },
|
|
{ 2, "Defer" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string orf_entry_action_vals[] = {
|
|
{ BGP_ORF_ADD, "Add" },
|
|
{ BGP_ORF_REMOVE, "Remove" },
|
|
{ BGP_ORF_REMOVEALL, "RemoveAll" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string orf_entry_match_vals[] = {
|
|
{ BGP_ORF_PERMIT, "Permit" },
|
|
{ BGP_ORF_DENY, "Deny" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string capability_vals[] = {
|
|
{ BGP_CAPABILITY_RESERVED, "Reserved capability" },
|
|
{ BGP_CAPABILITY_MULTIPROTOCOL, "Multiprotocol extensions capability" },
|
|
{ BGP_CAPABILITY_ROUTE_REFRESH, "Route refresh capability" },
|
|
{ BGP_CAPABILITY_COOPERATIVE_ROUTE_FILTERING, "Cooperative route filtering capability" },
|
|
{ BGP_CAPABILITY_GRACEFUL_RESTART, "Graceful Restart capability" },
|
|
{ BGP_CAPABILITY_4_OCTET_AS_NUMBER, "Support for 4-octet AS number capability" },
|
|
{ BGP_CAPABILITY_DYNAMIC_CAPABILITY, "Support for Dynamic capability" },
|
|
{ BGP_CAPABILITY_ADDITIONAL_PATHS, "Support for Additional Paths" },
|
|
{ BGP_CAPABILITY_ROUTE_REFRESH_CISCO, "Route refresh capability" },
|
|
{ BGP_CAPABILITY_ORF_CISCO, "Cooperative route filtering capability" },
|
|
{ BGP_CAPABILITY_ENHANCED_ROUTE_REFRESH, "Enhanced route refresh capability" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/* Capability Message action code */
|
|
static const value_string bgpcap_action[] = {
|
|
{ 0, "advertising a capability" },
|
|
{ 1, "removing a capability" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string mcast_vpn_route_type[] = {
|
|
{ MCAST_VPN_RTYPE_INTRA_AS_IPMSI_AD, "Intra-AS I-PMSI A-D route" },
|
|
{ MCAST_VPN_RTYPE_INTER_AS_IPMSI_AD, "Inter-AS I-PMSI A-D route" },
|
|
{ MCAST_VPN_RTYPE_SPMSI_AD , "S-PMSI A-D route" },
|
|
{ MCAST_VPN_RTYPE_LEAF_AD , "Leaf A-D route" },
|
|
{ MCAST_VPN_RTYPE_SOURCE_ACTIVE_AD , "Source Active A-D route" },
|
|
{ MCAST_VPN_RTYPE_SHARED_TREE_JOIN , "Shared Tree Join route" },
|
|
{ MCAST_VPN_RTYPE_SOURCE_TREE_JOIN , "Source Tree Join route" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/* NLRI type value_string as defined in idr-ls */
|
|
static const value_string bgp_ls_nlri_type_vals[] = {
|
|
{ LINK_STATE_LINK_NLRI, "Link NLRI" },
|
|
{ LINK_STATE_NODE_NLRI, "Node NLRI" },
|
|
{ LINK_STATE_IPV4_TOPOLOGY_PREFIX_NLRI, "IPv4 Topology Prefix NLRI" },
|
|
{ LINK_STATE_IPV6_TOPOLOGY_PREFIX_NLRI, "IPv6 Topology Prefix NLRI" },
|
|
{0, NULL },
|
|
};
|
|
|
|
/* Link-State NLRI Protocol-ID value strings */
|
|
static const value_string link_state_nlri_protocol_id_values[] = {
|
|
{BGP_LS_NLRI_PROTO_ID_UNKNOWN, "Unknown" },
|
|
{BGP_LS_NLRI_PROTO_ID_IS_IS_LEVEL_1, "IS-IS Level 1"},
|
|
{BGP_LS_NLRI_PROTO_ID_IS_IS_LEVEL_2, "IS-IS Level 2"},
|
|
{BGP_LS_NLRI_PROTO_ID_OSPF, "OSPF"},
|
|
{BGP_LS_NLRI_PROTO_ID_DIRECT, "Direct"},
|
|
{BGP_LS_NLRI_PROTO_ID_STATIC, "Static"},
|
|
{0, NULL},
|
|
};
|
|
|
|
/* Link-State routing universes */
|
|
static const val64_string link_state_nlri_routing_universe_values[] = {
|
|
{BGP_LS_NLRI_ROUTING_UNIVERSE_LEVEL_3, "L3 packet topology" },
|
|
{BGP_LS_NLRI_ROUTING_UNIVERSE_LEVEL_1, "L1 optical topology"},
|
|
{0, NULL}
|
|
};
|
|
|
|
/* Link state prefix NLRI OSPF Route Type */
|
|
static const value_string link_state_prefix_descriptors_ospf_route_type[] = {
|
|
{BGP_LS_PREFIX_OSPF_ROUTE_TYPE_UNKNOWN, "Unknown" },
|
|
{BGP_LS_PREFIX_OSPF_ROUTE_TYPE_INTRA_AREA, "Intra-Area"},
|
|
{BGP_LS_PREFIX_OSPF_ROUTE_TYPE_INTER_AREA, "Inter Area"},
|
|
{BGP_LS_PREFIX_OSPF_ROUTE_TYPE_EXTERNAL_1, "External 1"},
|
|
{BGP_LS_PREFIX_OSPF_ROUTE_TYPE_EXTERNAL_2, "External 2"},
|
|
{BGP_LS_PREFIX_OSPF_ROUTE_TYPE_NSSA_1, "NSSA 1"},
|
|
{BGP_LS_PREFIX_OSPF_ROUTE_TYPE_NSSA_2, "NSSA 2"},
|
|
{0, NULL}
|
|
};
|
|
|
|
/* NLRI type value_string as define in BGP flow spec RFC */
|
|
|
|
static const value_string flowspec_nlri_opvaluepair_type[] = {
|
|
{ BGPNLRI_FSPEC_DST_PFIX, "Destination prefix filter" },
|
|
{ BGPNLRI_FSPEC_SRC_PFIX, "Source prefix filter" },
|
|
{ BGPNLRI_FSPEC_IP_PROTO, "IP protocol filter" },
|
|
{ BGPNLRI_FSPEC_PORT, "Port filter" },
|
|
{ BGPNLRI_FSPEC_DST_PORT, "Destination port filter" },
|
|
{ BGPNLRI_FSPEC_SRC_PORT, "Source port filter" },
|
|
{ BGPNLRI_FSPEC_ICMP_TP, "ICMP type filter" },
|
|
{ BGPNLRI_FSPEC_ICMP_CD, "ICMP code filter" },
|
|
{ BGPNLRI_FSPEC_TCP_FLAGS,"TCP flags filter" },
|
|
{ BGPNLRI_FSPEC_PCK_LEN, "Packet Length filter" },
|
|
{ BGPNLRI_FSPEC_DSCP, "DSCP marking filter" },
|
|
{ BGPNLRI_FSPEC_FRAGMENT, "IP fragment filter" },
|
|
{0, NULL },
|
|
};
|
|
#define BGPNLRI_FSPEC_FRAGMENT 12 /* RFC 5575 */
|
|
|
|
|
|
/* Subtype Route Refresh, draft-ietf-idr-bgp-enhanced-route-refresh-02 */
|
|
static const value_string route_refresh_subtype_vals[] = {
|
|
{ 0, "Normal route refresh request [RFC2918] with/without ORF [RFC5291]" },
|
|
{ 1, "Demarcation of the beginning of a route refresh" },
|
|
{ 2, "Demarcation of the ending of a route refresh" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const true_false_string tfs_optional_wellknown = { "Optional", "Well-known" };
|
|
static const true_false_string tfs_transitive_non_transitive = { "Transitive", "Non-transitive" };
|
|
static const true_false_string tfs_partial_complete = { "Partial", "Complete" };
|
|
static const true_false_string tfs_extended_regular_length = { "Extended length", "Regular length" };
|
|
|
|
/* Maximal size of an IP address string */
|
|
#define MAX_SIZE_OF_IP_ADDR_STRING 16
|
|
|
|
static int proto_bgp = -1;
|
|
|
|
/* BGP header field initialisation */
|
|
|
|
/* global BGP header filed */
|
|
|
|
static int hf_bgp_marker = -1;
|
|
static int hf_bgp_length = -1;
|
|
static int hf_bgp_type = -1;
|
|
|
|
/* BGP open message header filed */
|
|
|
|
static int hf_bgp_open_version = -1;
|
|
static int hf_bgp_open_myas = -1;
|
|
static int hf_bgp_open_holdtime = -1;
|
|
static int hf_bgp_open_identifier = -1;
|
|
static int hf_bgp_open_opt_len = -1;
|
|
static int hf_bgp_open_opt_params = -1;
|
|
static int hf_bgp_open_opt_param = -1;
|
|
static int hf_bgp_open_opt_param_type = -1;
|
|
static int hf_bgp_open_opt_param_len = -1;
|
|
static int hf_bgp_open_opt_param_auth = -1;
|
|
static int hf_bgp_open_opt_param_unknown = -1;
|
|
|
|
/* BGP notify header field */
|
|
|
|
static int hf_bgp_notify_major_error = -1;
|
|
static int hf_bgp_notify_minor_msg_hdr = -1;
|
|
static int hf_bgp_notify_minor_open_msg = -1;
|
|
static int hf_bgp_notify_minor_update_msg = -1;
|
|
static int hf_bgp_notify_minor_ht_expired = -1;
|
|
static int hf_bgp_notify_minor_state_machine = -1;
|
|
static int hf_bgp_notify_minor_cease = -1;
|
|
static int hf_bgp_notify_minor_cap_msg = -1;
|
|
static int hf_bgp_notify_minor_unknown = -1;
|
|
static int hf_bgp_notify_data = -1;
|
|
|
|
/* BGP route refresh header field */
|
|
|
|
static int hf_bgp_route_refresh_afi = -1;
|
|
static int hf_bgp_route_refresh_subtype = -1;
|
|
static int hf_bgp_route_refresh_safi = -1;
|
|
static int hf_bgp_route_refresh_orf = -1;
|
|
static int hf_bgp_route_refresh_orf_flag = -1;
|
|
static int hf_bgp_route_refresh_orf_type = -1;
|
|
static int hf_bgp_route_refresh_orf_length = -1;
|
|
static int hf_bgp_route_refresh_orf_entry_prefixlist = -1;
|
|
static int hf_bgp_route_refresh_orf_entry_action = -1;
|
|
static int hf_bgp_route_refresh_orf_entry_match = -1;
|
|
static int hf_bgp_route_refresh_orf_entry_sequence = -1;
|
|
static int hf_bgp_route_refresh_orf_entry_prefixmask_lower = -1;
|
|
static int hf_bgp_route_refresh_orf_entry_prefixmask_upper = -1;
|
|
|
|
/* BGP capabilities header field */
|
|
|
|
static int hf_bgp_cap = -1;
|
|
static int hf_bgp_cap_type = -1;
|
|
static int hf_bgp_cap_length = -1;
|
|
static int hf_bgp_cap_action = -1;
|
|
static int hf_bgp_cap_unknown = -1;
|
|
static int hf_bgp_cap_reserved = -1;
|
|
static int hf_bgp_cap_mp_afi = -1;
|
|
static int hf_bgp_cap_mp_safi = -1;
|
|
static int hf_bgp_cap_gr_timers = -1;
|
|
static int hf_bgp_cap_gr_timers_restart_flag = -1;
|
|
static int hf_bgp_cap_gr_timers_restart_time = -1;
|
|
static int hf_bgp_cap_gr_afi = -1;
|
|
static int hf_bgp_cap_gr_safi = -1;
|
|
static int hf_bgp_cap_gr_flag = -1;
|
|
static int hf_bgp_cap_gr_flag_pfs = -1;
|
|
static int hf_bgp_cap_4as = -1;
|
|
static int hf_bgp_cap_dc = -1;
|
|
static int hf_bgp_cap_ap_afi = -1;
|
|
static int hf_bgp_cap_ap_safi = -1;
|
|
static int hf_bgp_cap_ap_sendreceive = -1;
|
|
static int hf_bgp_cap_orf_afi = -1;
|
|
static int hf_bgp_cap_orf_safi = -1;
|
|
static int hf_bgp_cap_orf_number = -1;
|
|
static int hf_bgp_cap_orf_type = -1;
|
|
static int hf_bgp_cap_orf_sendreceive = -1;
|
|
|
|
/* BGP update global header field */
|
|
static int hf_bgp_update_withdrawn_routes_length = -1;
|
|
static int hf_bgp_update_withdrawn_routes = -1;
|
|
|
|
|
|
/* BGP update path attribute header field */
|
|
static int hf_bgp_update_total_path_attribute_length = -1;
|
|
static int hf_bgp_update_path_attributes = -1;
|
|
static int hf_bgp_update_path_attribute_communities = -1;
|
|
static int hf_bgp_update_path_attribute_community_well_known = -1;
|
|
static int hf_bgp_update_path_attribute_community = -1;
|
|
static int hf_bgp_update_path_attribute_community_as = -1;
|
|
static int hf_bgp_update_path_attribute_community_value = -1;
|
|
static int hf_bgp_update_path_attribute = -1;
|
|
static int hf_bgp_update_path_attribute_flags = -1;
|
|
static int hf_bgp_update_path_attribute_flags_optional = -1;
|
|
static int hf_bgp_update_path_attribute_flags_transitive = -1;
|
|
static int hf_bgp_update_path_attribute_flags_partial = -1;
|
|
static int hf_bgp_update_path_attribute_flags_extended_length = -1;
|
|
static int hf_bgp_update_path_attribute_type_code = -1;
|
|
static int hf_bgp_update_path_attribute_length = -1;
|
|
static int hf_bgp_update_path_attribute_next_hop = -1;
|
|
static int hf_bgp_update_path_attribute_as_path_segment = -1;
|
|
static int hf_bgp_update_path_attribute_as_path_segment_type = -1;
|
|
static int hf_bgp_update_path_attribute_as_path_segment_length = -1;
|
|
static int hf_bgp_update_path_attribute_as_path_segment_as2 = -1;
|
|
static int hf_bgp_update_path_attribute_as_path_segment_as4 = -1;
|
|
static int hf_bgp_update_path_attribute_origin = -1;
|
|
static int hf_bgp_update_path_attribute_cluster_list = -1;
|
|
static int hf_bgp_update_path_attribute_originator_id = -1;
|
|
static int hf_bgp_update_path_attribute_local_pref = -1;
|
|
static int hf_bgp_update_path_attribute_multi_exit_disc = -1;
|
|
static int hf_bgp_update_path_attribute_aggregator_as = -1;
|
|
static int hf_bgp_update_path_attribute_aggregator_origin = -1;
|
|
static int hf_bgp_update_path_attribute_link_state = -1;
|
|
|
|
/* BGP update tunnel encaps attribute RFC 5512 */
|
|
|
|
static int hf_bgp_update_encaps_tunnel_tlv_len = -1;
|
|
static int hf_bgp_update_encaps_tunnel_tlv_type = -1;
|
|
static int hf_bgp_update_encaps_tunnel_subtlv_len = -1;
|
|
static int hf_bgp_update_encaps_tunnel_subtlv_type = -1;
|
|
|
|
|
|
/* BGP update path attribute SSA SAFI Specific attribute (deprecated should we keep it ?) */
|
|
|
|
static int hf_bgp_ssa_t = -1;
|
|
static int hf_bgp_ssa_type = -1;
|
|
static int hf_bgp_ssa_len = -1;
|
|
static int hf_bgp_ssa_value = -1;
|
|
static int hf_bgp_ssa_l2tpv3_pref = -1;
|
|
static int hf_bgp_ssa_l2tpv3_s = -1;
|
|
static int hf_bgp_ssa_l2tpv3_unused = -1;
|
|
static int hf_bgp_ssa_l2tpv3_cookie_len = -1;
|
|
static int hf_bgp_ssa_l2tpv3_session_id = -1;
|
|
static int hf_bgp_ssa_l2tpv3_cookie = -1;
|
|
|
|
/* BGP NLRI head field */
|
|
static int hf_bgp_update_nlri = -1;
|
|
|
|
static int hf_bgp_mp_reach_nlri_ipv4_prefix = -1;
|
|
static int hf_bgp_mp_unreach_nlri_ipv4_prefix = -1;
|
|
static int hf_bgp_mp_nlri_tnl_id = -1;
|
|
static int hf_bgp_withdrawn_prefix = -1;
|
|
static int hf_bgp_nlri_prefix = -1;
|
|
static int hf_bgp_nlri_path_id = -1;
|
|
|
|
/* BGP mcast IP VPN nlri header field */
|
|
|
|
static int hf_bgp_mcast_vpn_nlri_t = -1;
|
|
static int hf_bgp_mcast_vpn_nlri_route_type = -1;
|
|
static int hf_bgp_mcast_vpn_nlri_length = -1;
|
|
static int hf_bgp_mcast_vpn_nlri_rd = -1;
|
|
static int hf_bgp_mcast_vpn_nlri_origin_router_ipv4 = -1;
|
|
static int hf_bgp_mcast_vpn_nlri_origin_router_ipv6 = -1;
|
|
static int hf_bgp_mcast_vpn_nlri_source_as = -1;
|
|
static int hf_bgp_mcast_vpn_nlri_source_length = -1;
|
|
static int hf_bgp_mcast_vpn_nlri_group_length = -1;
|
|
static int hf_bgp_mcast_vpn_nlri_source_addr_ipv4 = -1;
|
|
static int hf_bgp_mcast_vpn_nlri_source_addr_ipv6 = -1;
|
|
static int hf_bgp_mcast_vpn_nlri_group_addr_ipv4 = -1;
|
|
static int hf_bgp_mcast_vpn_nlri_group_addr_ipv6 = -1;
|
|
static int hf_bgp_mcast_vpn_nlri_route_key = -1;
|
|
|
|
/* BGP-LS */
|
|
|
|
static int hf_bgp_ls_type = -1;
|
|
static int hf_bgp_ls_length = -1;
|
|
|
|
static int hf_bgp_ls_safi72_nlri = -1;
|
|
static int hf_bgp_ls_safi128_nlri = -1;
|
|
static int hf_bgp_ls_safi128_nlri_route_distinguisher = -1;
|
|
static int hf_bgp_ls_safi128_nlri_route_distinguisher_type = -1;
|
|
static int hf_bgp_ls_safi128_nlri_route_dist_admin_asnum_2 = -1;
|
|
static int hf_bgp_ls_safi128_nlri_route_dist_admin_ipv4 = -1;
|
|
static int hf_bgp_ls_safi128_nlri_route_dist_admin_asnum_4 = -1;
|
|
static int hf_bgp_ls_safi128_nlri_route_dist_asnum_2 = -1;
|
|
static int hf_bgp_ls_safi128_nlri_route_dist_asnum_4 = -1;
|
|
static int hf_bgp_ls_nlri_type = -1;
|
|
static int hf_bgp_ls_nlri_length = -1;
|
|
static int hf_bgp_ls_nlri_link_nlri_type = -1;
|
|
static int hf_bgp_ls_nlri_link_descriptors_tlv = -1;
|
|
static int hf_bgp_ls_nlri_prefix_descriptors_tlv = -1;
|
|
static int hf_bgp_ls_nlri_link_local_identifier = -1;
|
|
static int hf_bgp_ls_nlri_link_remote_identifier = -1;
|
|
static int hf_bgp_ls_nlri_ipv4_interface_address = -1;
|
|
static int hf_bgp_ls_nlri_ipv4_neighbor_address = -1;
|
|
static int hf_bgp_ls_nlri_ipv6_interface_address = -1;
|
|
static int hf_bgp_ls_nlri_ipv6_neighbor_address = -1;
|
|
static int hf_bgp_ls_nlri_multi_topology_id = -1;
|
|
static int hf_bgp_ls_nlri_ospf_route_type = -1;
|
|
static int hf_bgp_ls_nlri_ip_reachability_prefix_length = -1;
|
|
static int hf_bgp_ls_nlri_ip_reachability_prefix_ip = -1;
|
|
static int hf_bgp_ls_nlri_node_nlri_type = -1;
|
|
static int hf_bgp_ls_nlri_node_protocol_id = -1;
|
|
static int hf_bgp_ls_nlri_node_identifier = -1;
|
|
static int hf_bgp_ls_ipv4_topology_prefix_nlri_type = -1;
|
|
static int hf_bgp_ls_ipv6_topology_prefix_nlri_type = -1;
|
|
|
|
/* draft-ietf-idr-ls-distribution-03 TLVs */
|
|
static int hf_bgp_ls_tlv_local_node_descriptors = -1; /* 256 */
|
|
static int hf_bgp_ls_tlv_remote_node_descriptors = -1; /* 257 */
|
|
static int hf_bgp_ls_tlv_link_local_remote_identifiers = -1; /* 258 */
|
|
static int hf_bgp_ls_tlv_ipv4_interface_address = -1; /* 259 */
|
|
static int hf_bgp_ls_tlv_ipv4_neighbor_address = -1; /* 260 */
|
|
static int hf_bgp_ls_tlv_ipv6_interface_address = -1; /* 261 */
|
|
static int hf_bgp_ls_tlv_ipv6_neighbor_address = -1; /* 262 */
|
|
static int hf_bgp_ls_tlv_multi_topology_id = -1; /* 263 */
|
|
static int hf_bgp_ls_tlv_ospf_route_type = -1; /* 264 */
|
|
static int hf_bgp_ls_tlv_ip_reachability_information = -1; /* 265 */
|
|
|
|
static int hf_bgp_ls_tlv_autonomous_system = -1; /* 512 */
|
|
static int hf_bgp_ls_tlv_autonomous_system_id = -1;
|
|
static int hf_bgp_ls_tlv_bgp_ls_identifier = -1; /* 513 */
|
|
static int hf_bgp_ls_tlv_bgp_ls_identifier_id = -1;
|
|
static int hf_bgp_ls_tlv_area_id = -1; /* 514 */
|
|
static int hf_bgp_ls_tlv_area_id_id = -1;
|
|
static int hf_bgp_ls_tlv_igp_router = -1; /* 515 */
|
|
static int hf_bgp_ls_tlv_igp_router_id = -1;
|
|
|
|
static int hf_bgp_ls_tlv_node_flags_bits = -1; /* 1024 */
|
|
static int hf_bgp_ls_tlv_opaque_node_properties = -1; /* 1025 */
|
|
static int hf_bgp_ls_tlv_opaque_node_properties_value = -1;
|
|
static int hf_bgp_ls_tlv_node_name = -1; /* 1026 */
|
|
static int hf_bgp_ls_tlv_node_name_value = -1;
|
|
static int hf_bgp_ls_tlv_is_is_area_identifier = -1; /* 1027 */
|
|
static int hf_bgp_ls_tlv_is_is_area_identifier_value = -1;
|
|
static int hf_bgp_ls_tlv_ipv4_router_id_of_local_node = -1; /* 1028 */
|
|
static int hf_bgp_ls_tlv_ipv4_router_id_value = -1;
|
|
static int hf_bgp_ls_tlv_ipv6_router_id_value = -1;
|
|
static int hf_bgp_ls_tlv_ipv6_router_id_of_local_node = -1; /* 1029 */
|
|
static int hf_bgp_ls_tlv_ipv4_router_id_of_remote_node = -1; /* 1030 */
|
|
static int hf_bgp_ls_tlv_ipv6_router_id_of_remote_node = -1; /* 1031 */
|
|
|
|
static int hf_bgp_ls_tlv_administrative_group_color = -1; /* 1088 */
|
|
static int hf_bgp_ls_tlv_administrative_group_color_value = -1;
|
|
static int hf_bgp_ls_tlv_max_link_bandwidth = -1; /* 1089 */
|
|
static int hf_bgp_ls_tlv_max_reservable_link_bandwidth = -1; /* 1090 */
|
|
static int hf_bgp_ls_tlv_unreserved_bandwidth = -1; /* 1091 */
|
|
static int hf_bgp_ls_bandwidth_value = -1;
|
|
static int hf_bgp_ls_tlv_te_default_metric = -1; /* 1092 */
|
|
static int hf_bgp_ls_tlv_te_default_metric_value = -1;
|
|
static int hf_bgp_ls_tlv_link_protection_type = -1; /* 1093 */
|
|
static int hf_bgp_ls_tlv_link_protection_type_value = -1;
|
|
static int hf_bgp_ls_tlv_mpls_protocol_mask = -1; /* 1094 */
|
|
static int hf_bgp_ls_tlv_metric = -1; /* 1095 */
|
|
static int hf_bgp_ls_tlv_metric_value = -1;
|
|
static int hf_bgp_ls_tlv_shared_risk_link_group = -1; /* 1096 */
|
|
static int hf_bgp_ls_tlv_shared_risk_link_group_value = -1;
|
|
static int hf_bgp_ls_tlv_opaque_link_attribute = -1; /* 1097 */
|
|
static int hf_bgp_ls_tlv_opaque_link_attribute_value = -1;
|
|
static int hf_bgp_ls_tlv_link_name_attribute = -1; /* 1098 */
|
|
static int hf_bgp_ls_tlv_link_name_attribute_value = -1;
|
|
|
|
static int hf_bgp_ls_tlv_igp_flags = -1; /* 1152 */
|
|
static int hf_bgp_ls_tlv_route_tag = -1; /* 1153 */
|
|
static int hf_bgp_ls_tlv_route_tag_value = -1;
|
|
static int hf_bgp_ls_tlv_route_extended_tag = -1; /* 1154 */
|
|
static int hf_bgp_ls_tlv_route_extended_tag_value = -1;
|
|
static int hf_bgp_ls_tlv_prefix_metric = -1; /* 1155 */
|
|
static int hf_bgp_ls_tlv_prefix_metric_value = -1;
|
|
static int hf_bgp_ls_ospf_forwarding_address = -1; /* 1156 */
|
|
static int hf_bgp_ls_ospf_forwarding_address_ipv4_address = -1;
|
|
static int hf_bgp_ls_ospf_forwarding_address_ipv6_address = -1;
|
|
static int hf_bgp_ls_opaque_prefix_attribute = -1; /* 1157 */
|
|
static int hf_bgp_ls_opaque_prefix_attribute_value = -1;
|
|
|
|
|
|
/* Link Protection Types */
|
|
static int hf_bgp_ls_link_protection_type_extra_traffic = -1;
|
|
static int hf_bgp_ls_link_protection_type_unprotected = -1;
|
|
static int hf_bgp_ls_link_protection_type_shared = -1;
|
|
static int hf_bgp_ls_link_protection_type_dedicated_1to1 = -1;
|
|
static int hf_bgp_ls_link_protection_type_dedicated_1plus1 = -1;
|
|
static int hf_bgp_ls_link_protection_type_enhanced = -1;
|
|
/* MPLS Protocol Mask flags */
|
|
static int hf_bgp_ls_mpls_protocol_mask_flag_l = -1;
|
|
static int hf_bgp_ls_mpls_protocol_mask_flag_r = -1;
|
|
/* BGP-LS IGP Flags */
|
|
static int hf_bgp_ls_igp_flags_flag_d = -1;
|
|
/* Node Flag Bits TLV's flags */
|
|
static int hf_bgp_ls_node_flag_bits_overload = -1;
|
|
static int hf_bgp_ls_node_flag_bits_attached = -1;
|
|
static int hf_bgp_ls_node_flag_bits_external = -1;
|
|
static int hf_bgp_ls_node_flag_bits_abr = -1;
|
|
|
|
/* BGP flow spec nlri header field */
|
|
|
|
static int hf_bgp_flowspec_nlri_t = -1;
|
|
static int hf_bgp_flowspec_nlri_filter = -1;
|
|
static int hf_bgp_flowspec_nlri_filter_type = -1;
|
|
static int hf_bgp_flowspec_nlri_length = -1;
|
|
static int hf_bgp_flowspec_nlri_dst_pref_ipv4 = -1;
|
|
static int hf_bgp_flowspec_nlri_src_pref_ipv4 = -1;
|
|
static int hf_bgp_flowspec_nlri_op_flags = -1;
|
|
static int hf_bgp_flowspec_nlri_op_eol = -1;
|
|
static int hf_bgp_flowspec_nlri_op_and = -1;
|
|
static int hf_bgp_flowspec_nlri_op_val_len = -1;
|
|
static int hf_bgp_flowspec_nlri_op_un_bit4 = -1;
|
|
static int hf_bgp_flowspec_nlri_op_un_bit5 = -1;
|
|
static int hf_bgp_flowspec_nlri_op_lt = -1;
|
|
static int hf_bgp_flowspec_nlri_op_gt = -1;
|
|
static int hf_bgp_flowspec_nlri_op_eq = -1;
|
|
static int hf_bgp_flowspec_nlri_dec_val_8 = -1;
|
|
static int hf_bgp_flowspec_nlri_dec_val_16 = -1;
|
|
static int hf_bgp_flowspec_nlri_dec_val_32 = -1;
|
|
static int hf_bgp_flowspec_nlri_dec_val_64 = -1;
|
|
static int hf_bgp_flowspec_nlri_op_flg_not = -1;
|
|
static int hf_bgp_flowspec_nlri_op_flg_match = -1;
|
|
static int hf_bgp_flowspec_nlri_tcp_flags = -1;
|
|
static int hf_bgp_flowspec_nlri_tcp_flags_cwr = -1;
|
|
static int hf_bgp_flowspec_nlri_tcp_flags_ecn = -1;
|
|
static int hf_bgp_flowspec_nlri_tcp_flags_urg = -1;
|
|
static int hf_bgp_flowspec_nlri_tcp_flags_ack = -1;
|
|
static int hf_bgp_flowspec_nlri_tcp_flags_push = -1;
|
|
static int hf_bgp_flowspec_nlri_tcp_flags_reset = -1;
|
|
static int hf_bgp_flowspec_nlri_tcp_flags_syn = -1;
|
|
static int hf_bgp_flowspec_nlri_tcp_flags_fin = -1;
|
|
static int hf_bgp_flowspec_nlri_fflag = -1;
|
|
static int hf_bgp_flowspec_nlri_fflag_lf = -1;
|
|
static int hf_bgp_flowspec_nlri_fflag_ff = -1;
|
|
static int hf_bgp_flowspec_nlri_fflag_isf = -1;
|
|
static int hf_bgp_flowspec_nlri_fflag_df = -1;
|
|
static int hf_bgp_flowspec_nlri_dscp = -1;
|
|
|
|
/* BGP update safi ndt nlri draft-nalawade-idr-mdt-safi-03 */
|
|
|
|
static int hf_bgp_mdt_nlri_safi_rd = -1;
|
|
static int hf_bgp_mdt_nlri_safi_ipv4_addr = -1;
|
|
static int hf_bgp_mdt_nlri_safi_group_addr = -1;
|
|
|
|
/* BGP update extended community header field */
|
|
|
|
/* BGP QoS propagation draft-knoll-idr-qos-attribute */
|
|
|
|
static int hf_bgp_ext_com_qos_flags = -1;
|
|
static int hf_bgp_ext_com_qos_flags_remarking = -1;
|
|
static int hf_bgp_ext_com_qos_flags_ignore_remarking = -1;
|
|
static int hf_bgp_ext_com_qos_flags_agg_marking = -1;
|
|
static int hf_bgp_ext_com_cos_flags = -1;
|
|
static int hf_bgp_ext_com_cos_flags_be = -1;
|
|
static int hf_bgp_ext_com_cos_flags_ef = -1;
|
|
static int hf_bgp_ext_com_cos_flags_af = -1;
|
|
static int hf_bgp_ext_com_cos_flags_le = -1;
|
|
static int hf_bgp_ext_com_qos_set_number = -1;
|
|
static int hf_bgp_ext_com_qos_tech_type = -1;
|
|
static int hf_bgp_ext_com_qos_marking_o = -1;
|
|
static int hf_bgp_ext_com_qos_marking_a = -1;
|
|
static int hf_bgp_ext_com_qos_default_to_zero = -1;
|
|
|
|
/* BGP Flow spec extended community RFC 5575 */
|
|
|
|
static int hf_bgp_ext_com_flow_rate_float = -1;
|
|
static int hf_bgp_ext_com_flow_act_allset = -1;
|
|
static int hf_bgp_ext_com_flow_act_term_act = -1;
|
|
static int hf_bgp_ext_com_flow_act_samp_act = -1;
|
|
static int hf_bgp_ext_com_flow_redir_as = -1;
|
|
static int hf_bgp_ext_com_flow_redir_an = -1;
|
|
static int hf_bgp_ext_com_flow_redir = -1;
|
|
|
|
/* BGP L2 extended community RFC 4761, RFC 6624 */
|
|
/* draft-ietf-l2vpn-vpls-multihoming */
|
|
|
|
static int hf_bgp_ext_com_l2_encaps = -1;
|
|
static int hf_bgp_ext_com_l2_c_flags = -1;
|
|
static int hf_bgp_ext_com_l2_mtu = -1;
|
|
static int hf_bgp_ext_com_l2_flag_d = -1;
|
|
static int hf_bgp_ext_com_l2_flag_z1 = -1;
|
|
static int hf_bgp_ext_com_l2_flag_f = -1;
|
|
static int hf_bgp_ext_com_l2_flag_z345 = -1;
|
|
static int hf_bgp_ext_com_l2_flag_c = -1;
|
|
static int hf_bgp_ext_com_l2_flag_s = -1;
|
|
|
|
static gint ett_bgp = -1;
|
|
static gint ett_bgp_prefix = -1;
|
|
static gint ett_bgp_unfeas = -1;
|
|
static gint ett_bgp_attrs = -1;
|
|
static gint ett_bgp_attr = -1;
|
|
static gint ett_bgp_attr_flags = -1;
|
|
static gint ett_bgp_mp_nhna = -1;
|
|
static gint ett_bgp_mp_reach_nlri = -1;
|
|
static gint ett_bgp_mp_unreach_nlri = -1;
|
|
static gint ett_bgp_mp_snpa = -1;
|
|
static gint ett_bgp_nlri = -1;
|
|
static gint ett_bgp_open = -1;
|
|
static gint ett_bgp_update = -1;
|
|
static gint ett_bgp_notification = -1;
|
|
static gint ett_bgp_route_refresh = -1; /* ROUTE-REFRESH message tree */
|
|
static gint ett_bgp_capability = -1;
|
|
static gint ett_bgp_as_path_segment = -1;
|
|
static gint ett_bgp_as_path_segment_asn = -1;
|
|
static gint ett_bgp_communities = -1;
|
|
static gint ett_bgp_community = -1;
|
|
static gint ett_bgp_cluster_list = -1; /* cluster list tree */
|
|
static gint ett_bgp_options = -1; /* optional parameters tree */
|
|
static gint ett_bgp_option = -1; /* an optional parameter tree */
|
|
static gint ett_bgp_cap = -1; /* an cap parameter tree */
|
|
static gint ett_bgp_extended_communities = -1; /* extended communities list tree */
|
|
static gint ett_bgp_extended_com_fspec_redir = -1; /* extended communities BGP flow act redirect */
|
|
static gint ett_bgp_ext_com_flags = -1; /* extended communities flags tree */
|
|
static gint ett_bgp_ext_com_l2_flags = -1; /* extended commuties tree for l2 services flags */
|
|
static gint ett_bgp_ssa = -1; /* safi specific attribute */
|
|
static gint ett_bgp_ssa_subtree = -1; /* safi specific attribute Subtrees */
|
|
static gint ett_bgp_orf = -1; /* orf (outbound route filter) tree */
|
|
static gint ett_bgp_orf_entry = -1; /* orf entry tree */
|
|
static gint ett_bgp_mcast_vpn_nlri = -1;
|
|
static gint ett_bgp_flow_spec_nlri = -1;
|
|
static gint ett_bgp_flow_spec_nlri_filter = -1; /* tree decoding multiple op and value pairs */
|
|
static gint ett_bgp_flow_spec_nlri_op_flags = -1; /* tree decoding each op and val pair within the op and value set */
|
|
static gint ett_bgp_flow_spec_nlri_tcp = -1;
|
|
static gint ett_bgp_flow_spec_nlri_ff = -1;
|
|
static gint ett_bgp_tunnel_tlv = -1;
|
|
static gint ett_bgp_tunnel_tlv_subtree = -1;
|
|
static gint ett_bgp_tunnel_subtlv = -1;
|
|
static gint ett_bgp_tunnel_subtlv_subtree = -1;
|
|
static gint ett_bgp_link_state = -1;
|
|
|
|
static expert_field ei_bgp_cap_len_bad = EI_INIT;
|
|
static expert_field ei_bgp_cap_gr_helper_mode_only = EI_INIT;
|
|
static expert_field ei_bgp_notify_minor_unknown = EI_INIT;
|
|
static expert_field ei_bgp_route_refresh_orf_type_unknown = EI_INIT;
|
|
static expert_field ei_bgp_length_invalid = EI_INIT;
|
|
static expert_field ei_bgp_afi_type_not_supported = EI_INIT;
|
|
static expert_field ei_bgp_ls_error = EI_INIT;
|
|
|
|
/* desegmentation */
|
|
static gboolean bgp_desegment = TRUE;
|
|
|
|
static gint bgp_asn_len = 0;
|
|
|
|
|
|
/*
|
|
* Detect IPv4 prefixes conform to BGP Additional Path but NOT conform to standard BGP
|
|
*
|
|
* A real BGP speaker would rely on the BGP Additional Path in the BGP Open messages.
|
|
* But it is not suitable for a packet analyse because the BGP sessions are not supposed to
|
|
* restart very often, and Open messages from both sides of the session would be needed
|
|
* to determine the result of the capability negociation.
|
|
* Code inspired from the decode_prefix4 function
|
|
*/
|
|
static int
|
|
detect_add_path_prefix4(tvbuff_t *tvb, gint offset, gint end) {
|
|
guint32 addr_len;
|
|
guint8 prefix_len;
|
|
gint o;
|
|
/* Must be compatible with BGP Additional Path */
|
|
for (o = offset + 4; o < end; o += 4) {
|
|
prefix_len = tvb_get_guint8(tvb, o);
|
|
if( prefix_len > 32) {
|
|
return 0; /* invalid prefix length - not BGP add-path */
|
|
}
|
|
addr_len = (prefix_len + 7) / 8;
|
|
o += 1 + addr_len;
|
|
if( o > end ) {
|
|
return 0; /* invalid offset - not BGP add-path */
|
|
}
|
|
if (prefix_len % 8) {
|
|
/* detect bits set after the end of the prefix */
|
|
if( tvb_get_guint8(tvb, o - 1 ) & (0xFF >> (prefix_len % 8)) ) {
|
|
return 0; /* invalid prefix content - not BGP add-path */
|
|
}
|
|
}
|
|
}
|
|
/* Must NOT be compatible with standard BGP */
|
|
for (o = offset; o < end; ) {
|
|
prefix_len = tvb_get_guint8(tvb, o);
|
|
if( prefix_len > 32) {
|
|
return 1; /* invalid prefix length - may be BGP add-path */
|
|
}
|
|
addr_len = (prefix_len + 7) / 8;
|
|
o += 1 + addr_len;
|
|
if( o > end ) {
|
|
return 1; /* invalid offset - may be BGP add-path */
|
|
}
|
|
if (prefix_len % 8) {
|
|
/* detect bits set after the end of the prefix */
|
|
if( tvb_get_guint8(tvb, o - 1 ) & (0xFF >> (prefix_len % 8)) ) {
|
|
return 1; /* invalid prefix content - may be BGP add-path (or a bug) */
|
|
}
|
|
}
|
|
}
|
|
return 0; /* valid - do not assume Additional Path */
|
|
}
|
|
/*
|
|
* Decode an IPv4 prefix with Path Identifier
|
|
* Code inspired from the decode_prefix4 function
|
|
*/
|
|
static int
|
|
decode_path_prefix4(proto_tree *tree, int hf_path_id, int hf_addr, tvbuff_t *tvb, gint offset,
|
|
const char *tag)
|
|
{
|
|
proto_item *ti;
|
|
proto_tree *prefix_tree;
|
|
union {
|
|
guint8 addr_bytes[4];
|
|
guint32 addr;
|
|
} ip_addr; /* IP address */
|
|
guint8 plen; /* prefix length */
|
|
int length; /* number of octets needed for prefix */
|
|
guint32 path_identifier;
|
|
/* snarf path identifier length and prefix */
|
|
path_identifier = tvb_get_ntohl(tvb, offset);
|
|
plen = tvb_get_guint8(tvb, offset + 4);
|
|
length = ipv4_addr_and_mask(tvb, offset + 4 + 1, ip_addr.addr_bytes, plen);
|
|
if (length < 0) {
|
|
proto_tree_add_text(tree, tvb, offset + 4 , 1, "%s length %u invalid (> 32)",
|
|
tag, plen);
|
|
return -1;
|
|
}
|
|
/* put prefix into protocol tree */
|
|
ti = proto_tree_add_text(tree, tvb, offset,
|
|
4 + 1 + length, "%s/%u PathId %u ",
|
|
ip_to_str(ip_addr.addr_bytes), plen, path_identifier);
|
|
prefix_tree = proto_item_add_subtree(ti, ett_bgp_prefix);
|
|
if (hf_path_id != -1) {
|
|
proto_tree_add_uint(prefix_tree, hf_path_id, tvb, offset, 4,
|
|
path_identifier);
|
|
} else {
|
|
proto_tree_add_text(prefix_tree, tvb, offset, 4,
|
|
"%s Path Id: %u", tag, path_identifier);
|
|
}
|
|
proto_tree_add_text(prefix_tree, tvb, offset + 4, 1, "%s prefix length: %u",
|
|
tag, plen);
|
|
if (hf_addr != -1) {
|
|
proto_tree_add_ipv4(prefix_tree, hf_addr, tvb, offset + 4 + 1, length,
|
|
ip_addr.addr);
|
|
} else {
|
|
proto_tree_add_text(prefix_tree, tvb, offset + 4 + 1, length,
|
|
"%s prefix: %s", tag, ip_to_str(ip_addr.addr_bytes));
|
|
}
|
|
return(4 + 1 + length);
|
|
}
|
|
|
|
/*
|
|
* Decode an IPv4 prefix.
|
|
*/
|
|
static int
|
|
decode_prefix4(proto_tree *tree, proto_item *parent_item, int hf_addr, tvbuff_t *tvb, gint offset,
|
|
guint16 tlen, const char *tag)
|
|
{
|
|
proto_item *ti;
|
|
proto_tree *prefix_tree;
|
|
union {
|
|
guint8 addr_bytes[4];
|
|
guint32 addr;
|
|
} ip_addr; /* IP address */
|
|
guint8 plen; /* prefix length */
|
|
int length; /* number of octets needed for prefix */
|
|
|
|
/* snarf length and prefix */
|
|
plen = tvb_get_guint8(tvb, offset);
|
|
length = ipv4_addr_and_mask(tvb, offset + 1, ip_addr.addr_bytes, plen);
|
|
if (length < 0) {
|
|
proto_tree_add_text(tree, tvb, offset, 1, "%s length %u invalid (> 32)",
|
|
tag, plen);
|
|
return -1;
|
|
}
|
|
|
|
/* put prefix into protocol tree */
|
|
ti = proto_tree_add_text(tree, tvb, offset,
|
|
tlen != 0 ? tlen : 1 + length, "%s/%u",
|
|
ip_to_str(ip_addr.addr_bytes), plen);
|
|
/* append parent item if not NULL */
|
|
if (parent_item != NULL)
|
|
proto_item_append_text(parent_item, " (%s/%u)",
|
|
ip_to_str(ip_addr.addr_bytes), plen);
|
|
|
|
prefix_tree = proto_item_add_subtree(ti, ett_bgp_prefix);
|
|
proto_tree_add_text(prefix_tree, tvb, offset, 1, "%s prefix length: %u",
|
|
tag, plen);
|
|
if (hf_addr != -1) {
|
|
proto_tree_add_ipv4(prefix_tree, hf_addr, tvb, offset + 1, length,
|
|
ip_addr.addr);
|
|
} else {
|
|
proto_tree_add_text(prefix_tree, tvb, offset + 1, length,
|
|
"%s prefix: %s", tag, ip_to_str(ip_addr.addr_bytes));
|
|
}
|
|
return(1 + length);
|
|
}
|
|
|
|
/*
|
|
* Decode an IPv6 prefix.
|
|
*/
|
|
static int
|
|
decode_prefix6(proto_tree *tree, int hf_addr, tvbuff_t *tvb, gint offset,
|
|
guint16 tlen, const char *tag)
|
|
{
|
|
proto_item *ti;
|
|
proto_tree *prefix_tree;
|
|
struct e_in6_addr addr; /* IPv6 address */
|
|
int plen; /* prefix length */
|
|
int length; /* number of octets needed for prefix */
|
|
|
|
/* snarf length and prefix */
|
|
plen = tvb_get_guint8(tvb, offset);
|
|
length = ipv6_addr_and_mask(tvb, offset + 1, &addr, plen);
|
|
if (length < 0) {
|
|
proto_tree_add_text(tree, tvb, offset, 1, "%s length %u invalid",
|
|
tag, plen);
|
|
return -1;
|
|
}
|
|
|
|
/* put prefix into protocol tree */
|
|
ti = proto_tree_add_text(tree, tvb, offset,
|
|
tlen != 0 ? tlen : 1 + length, "%s/%u",
|
|
ip6_to_str(&addr), plen);
|
|
prefix_tree = proto_item_add_subtree(ti, ett_bgp_prefix);
|
|
proto_tree_add_text(prefix_tree, tvb, offset, 1, "%s prefix length: %u",
|
|
tag, plen);
|
|
if (hf_addr != -1) {
|
|
proto_tree_add_ipv6(prefix_tree, hf_addr, tvb, offset + 1, length,
|
|
addr.bytes);
|
|
} else {
|
|
proto_tree_add_text(prefix_tree, tvb, offset + 1, length,
|
|
"%s prefix: %s", tag, ip6_to_str(&addr));
|
|
}
|
|
return(1 + length);
|
|
}
|
|
|
|
static const char*
|
|
decode_bgp_rd(tvbuff_t *tvb, gint offset)
|
|
{
|
|
guint16 rd_type;
|
|
wmem_strbuf_t *strbuf;
|
|
|
|
rd_type = tvb_get_ntohs(tvb,offset);
|
|
strbuf = wmem_strbuf_new_label(wmem_packet_scope());
|
|
|
|
switch (rd_type) {
|
|
case FORMAT_AS2_LOC:
|
|
wmem_strbuf_append_printf(strbuf, "%u:%u", tvb_get_ntohs(tvb, offset + 2),
|
|
tvb_get_ntohl(tvb, offset + 4));
|
|
break;
|
|
case FORMAT_IP_LOC:
|
|
wmem_strbuf_append_printf(strbuf, "%s:%u", tvb_ip_to_str(tvb, offset + 2),
|
|
tvb_get_ntohs(tvb, offset + 6));
|
|
break ;
|
|
case FORMAT_AS4_LOC:
|
|
wmem_strbuf_append_printf(strbuf, "%u:%u", tvb_get_ntohl(tvb, offset + 2),
|
|
tvb_get_ntohs(tvb, offset + 6));
|
|
break ;
|
|
default:
|
|
wmem_strbuf_append_printf(strbuf, "Unknown (0x%04x) RD type",rd_type);
|
|
break;
|
|
} /* switch (rd_type) */
|
|
|
|
return wmem_strbuf_get_str(strbuf);
|
|
}
|
|
|
|
static int
|
|
decode_mcast_vpn_nlri_addresses(proto_tree *tree, tvbuff_t *tvb,
|
|
gint offset)
|
|
{
|
|
guint8 addr_len;
|
|
|
|
/* Multicast Source Address */
|
|
proto_tree_add_item(tree, hf_bgp_mcast_vpn_nlri_source_length, tvb, offset,
|
|
1, ENC_BIG_ENDIAN);
|
|
addr_len = tvb_get_guint8(tvb, offset);
|
|
if (addr_len != 32 && addr_len != 128)
|
|
return -1;
|
|
offset++;
|
|
if (addr_len == 32) {
|
|
proto_tree_add_item(tree, hf_bgp_mcast_vpn_nlri_source_addr_ipv4, tvb,
|
|
offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
} else {
|
|
proto_tree_add_item(tree, hf_bgp_mcast_vpn_nlri_source_addr_ipv6, tvb,
|
|
offset, 16, ENC_NA);
|
|
offset += 16;
|
|
}
|
|
|
|
/* Multicast Group Address */
|
|
proto_tree_add_item(tree, hf_bgp_mcast_vpn_nlri_group_length, tvb, offset,
|
|
1, ENC_BIG_ENDIAN);
|
|
addr_len = tvb_get_guint8(tvb, offset);
|
|
if (addr_len != 32 && addr_len != 128)
|
|
return -1;
|
|
offset++;
|
|
if (addr_len == 32) {
|
|
proto_tree_add_item(tree, hf_bgp_mcast_vpn_nlri_group_addr_ipv4, tvb,
|
|
offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
} else {
|
|
proto_tree_add_item(tree, hf_bgp_mcast_vpn_nlri_group_addr_ipv6, tvb,
|
|
offset, 16, ENC_NA);
|
|
offset += 16;
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
/*
|
|
* function to decode operator in BGP flow spec NLRI when it address decimal values (TCP ports, UDP ports, ports, ...)
|
|
*/
|
|
|
|
static void
|
|
decode_bgp_flow_spec_dec_operator(proto_tree *tree, tvbuff_t *tvb, gint offset)
|
|
{
|
|
|
|
proto_item *op_item;
|
|
proto_tree *op_tree;
|
|
|
|
op_item = proto_tree_add_item(tree, hf_bgp_flowspec_nlri_op_flags, tvb, offset, 1, ENC_NA);
|
|
op_tree = proto_item_add_subtree(op_item, ett_bgp_flow_spec_nlri_op_flags);
|
|
|
|
proto_tree_add_item(op_tree, hf_bgp_flowspec_nlri_op_eol,tvb,offset,1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(op_tree, hf_bgp_flowspec_nlri_op_and, tvb,offset,1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(op_tree, hf_bgp_flowspec_nlri_op_val_len ,tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(op_tree, hf_bgp_flowspec_nlri_op_un_bit4, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(op_tree, hf_bgp_flowspec_nlri_op_lt, tvb,offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(op_tree, hf_bgp_flowspec_nlri_op_gt, tvb,offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(op_tree, hf_bgp_flowspec_nlri_op_eq, tvb,offset, 1, ENC_BIG_ENDIAN);
|
|
}
|
|
|
|
/*
|
|
* Decode an operator and decimal values of BGP flow spec NLRI
|
|
*/
|
|
static int
|
|
decode_bgp_nlri_op_dec_value(proto_tree *parent_tree, proto_item *parent_item, tvbuff_t *tvb, gint offset)
|
|
{
|
|
guint8 nlri_operator;
|
|
guint cursor_op_val=0;
|
|
guint8 value_len=0;
|
|
guint value=0;
|
|
guint8 shift_amount=0;
|
|
guint first_loop=0;
|
|
|
|
proto_item_append_text(parent_item," (");
|
|
|
|
do {
|
|
nlri_operator = tvb_get_guint8(tvb, offset+cursor_op_val);
|
|
shift_amount = nlri_operator&0x30;
|
|
shift_amount = shift_amount >> 4;
|
|
value_len = 1 << shift_amount; /* as written in RFC 5575 section 4 */
|
|
/* call to a operator decode function */
|
|
decode_bgp_flow_spec_dec_operator(parent_tree, tvb, offset+cursor_op_val);
|
|
if (first_loop == 0)
|
|
{
|
|
/* If first operator we remoe a white space and or (||) is not relevant */
|
|
/* BGP flow spec NLRI operator bitmask */
|
|
proto_item_append_text(parent_item,"%s%s%s%s",
|
|
((nlri_operator & BGPNLRI_FSPEC_AND_BIT) == 0) ? "" : "&& ",
|
|
((nlri_operator & BGPNLRI_FSPEC_GREATER_THAN) == 0) ? "" : ">",
|
|
((nlri_operator & BGPNLRI_FSPEC_LESS_THAN) == 0) ? "" : "<",
|
|
((nlri_operator & BGPNLRI_FSPEC_EQUAL) == 0) ? "" : "=");
|
|
first_loop = 1;
|
|
}
|
|
else
|
|
{
|
|
proto_item_append_text(parent_item," %s%s%s%s",
|
|
((nlri_operator & BGPNLRI_FSPEC_AND_BIT) == 0) ? "||" : "&& ",
|
|
((nlri_operator & BGPNLRI_FSPEC_GREATER_THAN) == 0) ? "" : ">",
|
|
((nlri_operator & BGPNLRI_FSPEC_LESS_THAN) == 0) ? "" : "<",
|
|
((nlri_operator & BGPNLRI_FSPEC_EQUAL) == 0) ? "" : "=");
|
|
}
|
|
cursor_op_val++; /* we manage this operator we move to the value */
|
|
switch (value_len) {
|
|
case 1:
|
|
proto_tree_add_item(parent_tree, hf_bgp_flowspec_nlri_dec_val_8, tvb, offset+cursor_op_val, 1,ENC_BIG_ENDIAN);
|
|
value = tvb_get_guint8(tvb,offset+cursor_op_val);
|
|
break;
|
|
case 2:
|
|
proto_tree_add_item(parent_tree, hf_bgp_flowspec_nlri_dec_val_16, tvb, offset+cursor_op_val, 2,ENC_BIG_ENDIAN);
|
|
value = tvb_get_ntohs(tvb,offset+cursor_op_val);
|
|
break;
|
|
case 3:
|
|
proto_tree_add_item(parent_tree, hf_bgp_flowspec_nlri_dec_val_32, tvb, offset+cursor_op_val, 4, ENC_BIG_ENDIAN);
|
|
value = tvb_get_ntohl(tvb,offset+cursor_op_val);
|
|
break;
|
|
case 4:
|
|
proto_tree_add_item(parent_tree, hf_bgp_flowspec_nlri_dec_val_64, tvb, offset+cursor_op_val, 8, ENC_BIG_ENDIAN);
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
cursor_op_val = cursor_op_val + value_len;
|
|
proto_item_append_text(parent_item,"%u", value);
|
|
} while ((nlri_operator&BGPNLRI_FSPEC_END_OF_LST) == 0);
|
|
proto_item_append_text(parent_item,")");
|
|
return (cursor_op_val);
|
|
}
|
|
|
|
|
|
/*
|
|
* function to decode operator in BGP flow spec NLRI when it address a bitmask values (TCP flags, fragmentation flags,...)
|
|
*/
|
|
|
|
static void
|
|
decode_bgp_flow_spec_bitmask_operator(proto_tree *tree, tvbuff_t *tvb, gint offset)
|
|
{
|
|
proto_item *op_item;
|
|
proto_tree *op_tree;
|
|
|
|
op_item = proto_tree_add_item(tree, hf_bgp_flowspec_nlri_op_flags, tvb, offset, 1, ENC_NA);
|
|
op_tree = proto_item_add_subtree(op_item, ett_bgp_flow_spec_nlri_op_flags);
|
|
|
|
proto_tree_add_item(op_tree, hf_bgp_flowspec_nlri_op_eol,tvb,offset,1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(op_tree, hf_bgp_flowspec_nlri_op_and, tvb,offset,1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(op_tree, hf_bgp_flowspec_nlri_op_val_len ,tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(op_tree, hf_bgp_flowspec_nlri_op_un_bit4, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(op_tree, hf_bgp_flowspec_nlri_op_un_bit5, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(op_tree, hf_bgp_flowspec_nlri_op_flg_not, tvb,offset, 1,ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(op_tree, hf_bgp_flowspec_nlri_op_flg_match, tvb,offset, 1,ENC_BIG_ENDIAN);
|
|
}
|
|
|
|
/*
|
|
* Decode an operator and tcp flags bitmask of BGP flow spec NLRI
|
|
*/
|
|
static int
|
|
decode_bgp_nlri_op_tcpf_value(proto_tree *parent_tree, proto_item *parent_item, tvbuff_t *tvb, gint offset)
|
|
{
|
|
guint8 nlri_operator;
|
|
guint8 tcp_flags;
|
|
guint cursor_op_val=0;
|
|
proto_tree *tcp_tree;
|
|
proto_item *tcp_item;
|
|
guint8 value_len=0;
|
|
guint8 shift_amount=0;
|
|
guint first_loop=0;
|
|
|
|
proto_item_append_text(parent_item," (");
|
|
|
|
do {
|
|
nlri_operator = tvb_get_guint8(tvb, offset+cursor_op_val);
|
|
shift_amount = nlri_operator&0x30;
|
|
shift_amount = shift_amount >> 4;
|
|
value_len = 1 << shift_amount; /* as written in RFC 5575 section 4 */
|
|
decode_bgp_flow_spec_bitmask_operator(parent_tree, tvb, offset+cursor_op_val); /* call to a operator decode function */
|
|
if (first_loop == 0)
|
|
{
|
|
/* If first operator we remove a white space and or (||) is not relevant */
|
|
proto_item_append_text(parent_item,"%s%s%s%s",
|
|
((nlri_operator & BGPNLRI_FSPEC_AND_BIT) == 0) ? "" : "&& ",
|
|
((nlri_operator & BGPNLRI_FSPEC_GREATER_THAN) == 0) ? "" : ">",
|
|
((nlri_operator & BGPNLRI_FSPEC_LESS_THAN) == 0) ? "" : "<",
|
|
((nlri_operator & BGPNLRI_FSPEC_EQUAL) == 0) ? "" : "=");
|
|
first_loop = 1;
|
|
}
|
|
else
|
|
{
|
|
proto_item_append_text(parent_item," %s%s%s%s",
|
|
((nlri_operator & BGPNLRI_FSPEC_AND_BIT) == 0) ? "||" : "&& ",
|
|
((nlri_operator & BGPNLRI_FSPEC_GREATER_THAN) == 0) ? "" : ">",
|
|
((nlri_operator & BGPNLRI_FSPEC_LESS_THAN) == 0) ? "" : "<",
|
|
((nlri_operator & BGPNLRI_FSPEC_EQUAL) == 0) ? "" : "=");
|
|
}
|
|
cursor_op_val++; /* we manage this operator we move to the value */
|
|
if (value_len == 2) {
|
|
cursor_op_val++; /* tcp flags are coded over 2 bytes only the second one is significant, we move to second byte */
|
|
}
|
|
|
|
tcp_item = proto_tree_add_item(parent_tree, hf_bgp_flowspec_nlri_tcp_flags, tvb, offset+cursor_op_val, 1, ENC_NA);
|
|
tcp_tree = proto_item_add_subtree(tcp_item, ett_bgp_flow_spec_nlri_tcp);
|
|
tcp_flags = tvb_get_guint8(tvb,offset+cursor_op_val);
|
|
|
|
proto_tree_add_item(tcp_tree, hf_bgp_flowspec_nlri_tcp_flags_cwr, tvb, offset+cursor_op_val, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tcp_tree, hf_bgp_flowspec_nlri_tcp_flags_ecn, tvb, offset+cursor_op_val, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tcp_tree, hf_bgp_flowspec_nlri_tcp_flags_urg, tvb, offset+cursor_op_val, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tcp_tree, hf_bgp_flowspec_nlri_tcp_flags_ack, tvb, offset+cursor_op_val, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tcp_tree, hf_bgp_flowspec_nlri_tcp_flags_push, tvb, offset+cursor_op_val, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tcp_tree, hf_bgp_flowspec_nlri_tcp_flags_reset, tvb, offset+cursor_op_val, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tcp_tree, hf_bgp_flowspec_nlri_tcp_flags_syn, tvb, offset+cursor_op_val, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tcp_tree, hf_bgp_flowspec_nlri_tcp_flags_fin, tvb, offset+cursor_op_val, 1, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(parent_item," %s%s%s%s%s%s",
|
|
((tcp_flags & BGPNLRI_FSPEC_TH_URG) == 0) ? "" : "U",
|
|
((tcp_flags & BGPNLRI_FSPEC_TH_ACK) == 0) ? "" : "A",
|
|
((tcp_flags & BGPNLRI_FSPEC_TH_PUSH) == 0) ? "" : "P",
|
|
((tcp_flags & BGPNLRI_FSPEC_TH_RST) == 0) ? "" : "R",
|
|
((tcp_flags & BGPNLRI_FSPEC_TH_SYN) == 0) ? "" : "S",
|
|
((tcp_flags & BGPNLRI_FSPEC_TH_FIN) == 0) ? "" : "F");
|
|
cursor_op_val = cursor_op_val + value_len;
|
|
} while ((nlri_operator&BGPNLRI_FSPEC_END_OF_LST) == 0);
|
|
proto_item_append_text(parent_item,")");
|
|
return (cursor_op_val);
|
|
}
|
|
|
|
|
|
/*
|
|
* Decode an operator and fragmentation bitmask of BGP flow spec NLRI
|
|
*/
|
|
static int
|
|
decode_bgp_nlri_op_fflag_value(proto_tree *parent_tree, proto_item *parent_item, tvbuff_t *tvb, gint offset)
|
|
{
|
|
guint8 nlri_operator;
|
|
guint8 fragment_flags;
|
|
guint cursor_op_val=0;
|
|
proto_tree *ff_tree;
|
|
proto_item *ff_item;
|
|
guint8 value_len=0;
|
|
guint8 shift_amount=0;
|
|
guint first_loop=0;
|
|
|
|
proto_item_append_text(parent_item," (");
|
|
|
|
do {
|
|
nlri_operator = tvb_get_guint8(tvb, offset+cursor_op_val);
|
|
shift_amount = nlri_operator&0x30;
|
|
shift_amount = shift_amount >> 4;
|
|
value_len = 1 << shift_amount; /* as written in RFC 5575 section 4 */
|
|
/* call a function to decode operator addressing bitmaks */
|
|
decode_bgp_flow_spec_bitmask_operator(parent_tree, tvb, offset+cursor_op_val);
|
|
if (first_loop == 0)
|
|
{
|
|
/* If first operator we remove a white space and or (||) is not relevant */
|
|
proto_item_append_text(parent_item,"%s%s%s%s",
|
|
((nlri_operator & BGPNLRI_FSPEC_AND_BIT) == 0) ? "" : "&& ",
|
|
((nlri_operator & BGPNLRI_FSPEC_GREATER_THAN) == 0) ? "" : ">",
|
|
((nlri_operator & BGPNLRI_FSPEC_LESS_THAN) == 0) ? "" : "<",
|
|
((nlri_operator & BGPNLRI_FSPEC_EQUAL) == 0) ? "" : "=");
|
|
first_loop = 1;
|
|
}
|
|
else
|
|
{
|
|
proto_item_append_text(parent_item," %s%s%s%s",
|
|
((nlri_operator & BGPNLRI_FSPEC_AND_BIT) == 0) ? "||" : "&& ",
|
|
((nlri_operator & BGPNLRI_FSPEC_GREATER_THAN) == 0) ? "" : ">",
|
|
((nlri_operator & BGPNLRI_FSPEC_LESS_THAN) == 0) ? "" : "<",
|
|
((nlri_operator & BGPNLRI_FSPEC_EQUAL) == 0) ? "" : "=");
|
|
}
|
|
cursor_op_val++; /* we manage this operator we move to the value */
|
|
if (value_len != 1) {
|
|
return -1; /* frag flags have to be coded in 1 byte */
|
|
}
|
|
fragment_flags = tvb_get_guint8(tvb,offset+cursor_op_val);
|
|
ff_item = proto_tree_add_item(parent_tree, hf_bgp_flowspec_nlri_fflag, tvb, offset+cursor_op_val, 1, ENC_NA);
|
|
ff_tree = proto_item_add_subtree(ff_item, ett_bgp_flow_spec_nlri_ff);
|
|
proto_tree_add_item(ff_tree, hf_bgp_flowspec_nlri_fflag_lf, tvb, offset+cursor_op_val, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(ff_tree, hf_bgp_flowspec_nlri_fflag_ff, tvb, offset+cursor_op_val, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(ff_tree, hf_bgp_flowspec_nlri_fflag_isf, tvb, offset+cursor_op_val, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(ff_tree, hf_bgp_flowspec_nlri_fflag_df, tvb, offset+cursor_op_val, 1, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(parent_item," %s%s%s%s",
|
|
((fragment_flags & BGPNLRI_FSPEC_FG_DF) == 0) ? "" : "DF",
|
|
((fragment_flags & BGPNLRI_FSPEC_FG_ISF) == 0) ? "" : "IsF",
|
|
((fragment_flags & BGPNLRI_FSPEC_FG_FF) == 0) ? "" : "FF",
|
|
((fragment_flags & BGPNLRI_FSPEC_FG_LF) == 0) ? "" : "LF");
|
|
cursor_op_val = cursor_op_val + value_len;
|
|
} while ((nlri_operator&BGPNLRI_FSPEC_END_OF_LST) == 0);
|
|
proto_item_append_text(parent_item,")");
|
|
return (cursor_op_val);
|
|
}
|
|
|
|
/*
|
|
* Decode an operator and DSCP value of BGP flow spec NLRI
|
|
*/
|
|
static int
|
|
decode_bgp_nlri_op_dscp_value(proto_tree *parent_tree, proto_item *parent_item, tvbuff_t *tvb, gint offset)
|
|
{
|
|
guint8 nlri_operator;
|
|
guint8 dscp_flags;
|
|
guint cursor_op_val=0;
|
|
guint8 value_len=0;
|
|
guint8 shift_amount=0;
|
|
guint first_loop=0;
|
|
|
|
proto_item_append_text(parent_item," (");
|
|
|
|
do {
|
|
nlri_operator = tvb_get_guint8(tvb, offset+cursor_op_val);
|
|
shift_amount = nlri_operator&0x30;
|
|
shift_amount = shift_amount >> 4;
|
|
value_len = 1 << shift_amount; /* as written in RFC 5575 section 4 */
|
|
/* call a function to decode operator addressing bitmaks */
|
|
decode_bgp_flow_spec_bitmask_operator(parent_tree, tvb, offset+cursor_op_val);
|
|
if (first_loop == 0)
|
|
{
|
|
/* If first operator we remove a white space and or (||) is not relevant */
|
|
proto_item_append_text(parent_item,"%s%s%s%s",
|
|
((nlri_operator & BGPNLRI_FSPEC_AND_BIT) == 0) ? "" : "&& ",
|
|
((nlri_operator & BGPNLRI_FSPEC_GREATER_THAN) == 0) ? "" : ">",
|
|
((nlri_operator & BGPNLRI_FSPEC_LESS_THAN) == 0) ? "" : "<",
|
|
((nlri_operator & BGPNLRI_FSPEC_EQUAL) == 0) ? "" : "=");
|
|
first_loop = 1;
|
|
}
|
|
else
|
|
{
|
|
proto_item_append_text(parent_item," %s%s%s%s",
|
|
((nlri_operator & BGPNLRI_FSPEC_AND_BIT) == 0) ? "||" : "&& ",
|
|
((nlri_operator & BGPNLRI_FSPEC_GREATER_THAN) == 0) ? "" : ">",
|
|
((nlri_operator & BGPNLRI_FSPEC_LESS_THAN) == 0) ? "" : "<",
|
|
((nlri_operator & BGPNLRI_FSPEC_EQUAL) == 0) ? "" : "=");
|
|
}
|
|
cursor_op_val++; /* we manage this operator we move to the value */
|
|
if (value_len != 1) {
|
|
return -1; /* frag flags have to be coded in 1 byte */
|
|
}
|
|
dscp_flags = tvb_get_guint8(tvb,offset+cursor_op_val);
|
|
dscp_flags = dscp_flags >> 2;
|
|
proto_tree_add_item(parent_tree, hf_bgp_flowspec_nlri_dscp, tvb, offset+cursor_op_val, 1, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(parent_item,"%s",val_to_str_ext_const(dscp_flags,&dscp_vals_ext, "Unknown DSCP"));
|
|
cursor_op_val = cursor_op_val + value_len;
|
|
} while ((nlri_operator&BGPNLRI_FSPEC_END_OF_LST) == 0);
|
|
proto_item_append_text(parent_item,")");
|
|
return (cursor_op_val);
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Decode an FLOWSPEC nlri as define in RFC 5575
|
|
*/
|
|
static int
|
|
decode_flowspec_nlri(proto_tree *tree, tvbuff_t *tvb, gint offset, guint16 afi, packet_info *pinfo)
|
|
{
|
|
guint tot_flow_len; /* total length of the flow spec NLRI */
|
|
guint offset_len; /* offset of the flow spec NLRI itself could be 1 or 2 bytes */
|
|
guint cursor_fspec; /* cursor to move into flow spec nlri */
|
|
gint filter_len;
|
|
guint16 len_16;
|
|
proto_item *item;
|
|
proto_item *filter_item;
|
|
proto_tree *nlri_tree;
|
|
proto_tree *filter_tree;
|
|
|
|
|
|
if (afi != AFNUM_INET)
|
|
{
|
|
expert_add_info(pinfo, NULL, &ei_bgp_afi_type_not_supported);
|
|
return(-1);
|
|
}
|
|
|
|
tot_flow_len = tvb_get_guint8(tvb, offset);
|
|
/* if nlri length is greater than 240 bytes, it is encoded over 2 bytes */
|
|
/* with most significant nibble all in one. 240 is encoded 0xf0f0, 241 0xf0f1 */
|
|
/* max possible value value is 4095 Oxffff */
|
|
|
|
if (tot_flow_len >= 240)
|
|
{
|
|
len_16 = tvb_get_ntohs(tvb, offset);
|
|
tot_flow_len = len_16 >> 4; /* move 4 bits to the right to remove first f */
|
|
offset_len = 2;
|
|
} else {
|
|
offset_len = 1;
|
|
}
|
|
|
|
item = proto_tree_add_item(tree, hf_bgp_flowspec_nlri_t, tvb, offset,
|
|
tot_flow_len+offset_len, ENC_NA);
|
|
proto_item_set_text(item, "FLOW_SPEC_NLRI (%u byte%s)",
|
|
tot_flow_len+offset_len, plurality(tot_flow_len+offset_len, "", "s"));
|
|
|
|
nlri_tree = proto_item_add_subtree(item, ett_bgp_flow_spec_nlri);
|
|
|
|
proto_tree_add_uint(nlri_tree, hf_bgp_flowspec_nlri_length, tvb, offset,
|
|
offset_len, tot_flow_len);
|
|
|
|
offset = offset + offset_len;
|
|
cursor_fspec = 0;
|
|
|
|
while (cursor_fspec < tot_flow_len)
|
|
{
|
|
filter_item = proto_tree_add_item(nlri_tree, hf_bgp_flowspec_nlri_filter, tvb, offset+cursor_fspec, 1, ENC_NA);
|
|
filter_tree = proto_item_add_subtree(filter_item, ett_bgp_flow_spec_nlri_filter);
|
|
proto_tree_add_item(filter_tree, hf_bgp_flowspec_nlri_filter_type, tvb, offset+cursor_fspec, 1, ENC_NA);
|
|
proto_item_append_text(filter_item, ": %s", val_to_str(tvb_get_guint8(tvb,offset+cursor_fspec), flowspec_nlri_opvaluepair_type, "Unknown filter %d"));
|
|
switch (tvb_get_guint8(tvb,offset+cursor_fspec)) {
|
|
case BGPNLRI_FSPEC_DST_PFIX:
|
|
cursor_fspec++;
|
|
filter_len = decode_prefix4(filter_tree, filter_item, hf_bgp_flowspec_nlri_dst_pref_ipv4, tvb, offset+cursor_fspec, 0, "Destination IP filter");
|
|
if (filter_len == -1)
|
|
cursor_fspec= tot_flow_len;
|
|
break;
|
|
case BGPNLRI_FSPEC_SRC_PFIX:
|
|
cursor_fspec++;
|
|
filter_len = decode_prefix4(filter_tree, filter_item, hf_bgp_flowspec_nlri_src_pref_ipv4, tvb, offset+cursor_fspec, 0, "Source IP filter");
|
|
if (filter_len == -1)
|
|
cursor_fspec= tot_flow_len;
|
|
break;
|
|
case BGPNLRI_FSPEC_IP_PROTO:
|
|
cursor_fspec++;
|
|
filter_len = decode_bgp_nlri_op_dec_value(filter_tree, filter_item, tvb, offset+cursor_fspec);
|
|
break;
|
|
case BGPNLRI_FSPEC_PORT:
|
|
cursor_fspec++;
|
|
filter_len = decode_bgp_nlri_op_dec_value(filter_tree, filter_item, tvb, offset+cursor_fspec);
|
|
break;
|
|
case BGPNLRI_FSPEC_DST_PORT:
|
|
cursor_fspec++;
|
|
filter_len = decode_bgp_nlri_op_dec_value(filter_tree, filter_item, tvb, offset+cursor_fspec);
|
|
break;
|
|
case BGPNLRI_FSPEC_SRC_PORT:
|
|
cursor_fspec++;
|
|
filter_len = decode_bgp_nlri_op_dec_value(filter_tree, filter_item, tvb, offset+cursor_fspec);
|
|
break;
|
|
case BGPNLRI_FSPEC_ICMP_TP:
|
|
cursor_fspec++;
|
|
filter_len = decode_bgp_nlri_op_dec_value(filter_tree, filter_item, tvb, offset+cursor_fspec);
|
|
break;
|
|
case BGPNLRI_FSPEC_ICMP_CD:
|
|
cursor_fspec++;
|
|
filter_len = decode_bgp_nlri_op_dec_value(filter_tree, filter_item, tvb, offset+cursor_fspec);
|
|
break;
|
|
case BGPNLRI_FSPEC_TCP_FLAGS:
|
|
cursor_fspec++;
|
|
filter_len = decode_bgp_nlri_op_tcpf_value(filter_tree, filter_item, tvb, offset+cursor_fspec);
|
|
break;
|
|
case BGPNLRI_FSPEC_PCK_LEN:
|
|
cursor_fspec++;
|
|
filter_len = decode_bgp_nlri_op_dec_value(filter_tree, filter_item, tvb, offset+cursor_fspec);
|
|
break;
|
|
case BGPNLRI_FSPEC_DSCP:
|
|
cursor_fspec++;
|
|
filter_len = decode_bgp_nlri_op_dscp_value(filter_tree, filter_item, tvb, offset+cursor_fspec);
|
|
break;
|
|
case BGPNLRI_FSPEC_FRAGMENT:
|
|
cursor_fspec++;
|
|
filter_len = decode_bgp_nlri_op_fflag_value(filter_tree, filter_item, tvb, offset+cursor_fspec);
|
|
break;
|
|
default:
|
|
proto_tree_add_text(filter_tree, tvb, offset+cursor_fspec,1,
|
|
"NLRI Type unknown (%u)",tvb_get_guint8(tvb,offset+cursor_fspec));
|
|
return -1;
|
|
}
|
|
if (filter_len>0)
|
|
cursor_fspec += filter_len;
|
|
else
|
|
break;
|
|
proto_item_set_len(filter_item,filter_len+1);
|
|
}
|
|
return(tot_flow_len);
|
|
}
|
|
|
|
/*
|
|
* Decode an MCAST-VPN nlri as defined in draft-ietf-l3vpn-2547bis-mcast-bgp-08.txt .
|
|
*/
|
|
static int
|
|
decode_mcast_vpn_nlri(proto_tree *tree, tvbuff_t *tvb, gint offset, guint16 afi)
|
|
{
|
|
guint8 route_type, length, ip_length;
|
|
proto_item *item;
|
|
proto_tree *nlri_tree;
|
|
guint32 route_key_length;
|
|
int ret;
|
|
|
|
ip_length = (afi == AFNUM_INET) ? 4 : 16;
|
|
|
|
route_type = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(tree, hf_bgp_mcast_vpn_nlri_route_type, tvb,
|
|
offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
length = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(tree, hf_bgp_mcast_vpn_nlri_length, tvb, offset,
|
|
1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
if (length < tvb_reported_length_remaining(tvb, offset))
|
|
return -1;
|
|
|
|
item = proto_tree_add_item(tree, hf_bgp_mcast_vpn_nlri_t, tvb, offset,
|
|
length, ENC_NA);
|
|
proto_item_set_text(item, "%s (%u byte%s)",
|
|
val_to_str_const(route_type, mcast_vpn_route_type, "Unknown"),
|
|
length, plurality(length, "", "s"));
|
|
|
|
nlri_tree = proto_item_add_subtree(item, ett_bgp_mcast_vpn_nlri);
|
|
|
|
switch (route_type) {
|
|
case MCAST_VPN_RTYPE_INTRA_AS_IPMSI_AD:
|
|
item = proto_tree_add_item(nlri_tree, hf_bgp_mcast_vpn_nlri_rd, tvb,
|
|
offset, BGP_ROUTE_DISTINGUISHER_SIZE,
|
|
ENC_NA);
|
|
proto_item_set_text(item, "Route Distinguisher: %s",
|
|
decode_bgp_rd(tvb, offset));
|
|
offset += BGP_ROUTE_DISTINGUISHER_SIZE;
|
|
|
|
if (afi == AFNUM_INET)
|
|
proto_tree_add_item(nlri_tree,
|
|
hf_bgp_mcast_vpn_nlri_origin_router_ipv4,
|
|
tvb, offset, ip_length, ENC_BIG_ENDIAN);
|
|
else
|
|
proto_tree_add_item(nlri_tree,
|
|
hf_bgp_mcast_vpn_nlri_origin_router_ipv6,
|
|
tvb, offset, ip_length, ENC_NA);
|
|
break;
|
|
|
|
case MCAST_VPN_RTYPE_INTER_AS_IPMSI_AD:
|
|
item = proto_tree_add_item(nlri_tree, hf_bgp_mcast_vpn_nlri_rd, tvb,
|
|
offset, BGP_ROUTE_DISTINGUISHER_SIZE,
|
|
ENC_NA);
|
|
proto_item_set_text(item, "Route Distinguisher: %s",
|
|
decode_bgp_rd(tvb, offset));
|
|
offset += BGP_ROUTE_DISTINGUISHER_SIZE;
|
|
|
|
proto_tree_add_item(nlri_tree, hf_bgp_mcast_vpn_nlri_source_as, tvb,
|
|
offset, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case MCAST_VPN_RTYPE_SPMSI_AD:
|
|
item = proto_tree_add_item(nlri_tree, hf_bgp_mcast_vpn_nlri_rd, tvb,
|
|
offset, BGP_ROUTE_DISTINGUISHER_SIZE,
|
|
ENC_NA);
|
|
proto_item_set_text(item, "Route Distinguisher: %s",
|
|
decode_bgp_rd(tvb, offset));
|
|
offset += BGP_ROUTE_DISTINGUISHER_SIZE;
|
|
|
|
ret = decode_mcast_vpn_nlri_addresses(nlri_tree, tvb, offset);
|
|
if (ret < 0)
|
|
return -1;
|
|
break;
|
|
|
|
case MCAST_VPN_RTYPE_LEAF_AD:
|
|
route_key_length = length - ip_length;
|
|
item = proto_tree_add_item(nlri_tree,
|
|
hf_bgp_mcast_vpn_nlri_route_key, tvb,
|
|
offset, route_key_length, ENC_NA);
|
|
proto_item_set_text(item, "Route Key (%u byte%s)", route_key_length,
|
|
plurality(route_key_length, "", "s"));
|
|
offset += route_key_length;
|
|
|
|
if (afi == AFNUM_INET)
|
|
proto_tree_add_item(nlri_tree,
|
|
hf_bgp_mcast_vpn_nlri_origin_router_ipv4,
|
|
tvb, offset, ip_length, ENC_BIG_ENDIAN);
|
|
else
|
|
proto_tree_add_item(nlri_tree,
|
|
hf_bgp_mcast_vpn_nlri_origin_router_ipv6,
|
|
tvb, offset, ip_length, ENC_NA);
|
|
break;
|
|
|
|
case MCAST_VPN_RTYPE_SOURCE_ACTIVE_AD:
|
|
item = proto_tree_add_item(nlri_tree, hf_bgp_mcast_vpn_nlri_rd, tvb,
|
|
offset, BGP_ROUTE_DISTINGUISHER_SIZE,
|
|
ENC_NA);
|
|
proto_item_set_text(item, "Route Distinguisher: %s",
|
|
decode_bgp_rd(tvb, offset));
|
|
offset += BGP_ROUTE_DISTINGUISHER_SIZE;
|
|
|
|
ret = decode_mcast_vpn_nlri_addresses(nlri_tree, tvb, offset);
|
|
if (ret < 0)
|
|
return -1;
|
|
break;
|
|
|
|
case MCAST_VPN_RTYPE_SHARED_TREE_JOIN:
|
|
case MCAST_VPN_RTYPE_SOURCE_TREE_JOIN:
|
|
item = proto_tree_add_item(nlri_tree, hf_bgp_mcast_vpn_nlri_rd, tvb,
|
|
offset, BGP_ROUTE_DISTINGUISHER_SIZE,
|
|
ENC_NA);
|
|
proto_item_set_text(item, "Route Distinguisher: %s",
|
|
decode_bgp_rd(tvb, offset));
|
|
offset += BGP_ROUTE_DISTINGUISHER_SIZE;
|
|
|
|
proto_tree_add_item(nlri_tree, hf_bgp_mcast_vpn_nlri_source_as, tvb,
|
|
offset, 4, ENC_NA);
|
|
offset += 4;
|
|
|
|
ret = decode_mcast_vpn_nlri_addresses(nlri_tree, tvb, offset);
|
|
if (ret < 0)
|
|
return -1;
|
|
break;
|
|
}
|
|
|
|
/* route type field (1 byte) + length field (1 byte) + length */
|
|
return 2 + length;
|
|
}
|
|
|
|
/*
|
|
* Decodes an MDT-SAFI message.
|
|
*/
|
|
static guint
|
|
decode_mdt_safi(proto_tree *tree, tvbuff_t *tvb, gint offset)
|
|
{
|
|
const guint ip_length = 4;
|
|
const guint mdt_safi_nlri_length_bits = 128;
|
|
guint length; /* length in bits */
|
|
gint orig_offset = offset;
|
|
proto_item *item;
|
|
|
|
length = tvb_get_guint8(tvb, offset);
|
|
if (length != mdt_safi_nlri_length_bits)
|
|
return -1;
|
|
offset++;
|
|
|
|
item = proto_tree_add_item(tree, hf_bgp_mdt_nlri_safi_rd, tvb,
|
|
offset, BGP_ROUTE_DISTINGUISHER_SIZE, ENC_NA);
|
|
proto_item_set_text(item, "Route Distinguisher: %s",
|
|
decode_bgp_rd(tvb, offset));
|
|
offset += BGP_ROUTE_DISTINGUISHER_SIZE;
|
|
|
|
proto_tree_add_item(tree, hf_bgp_mdt_nlri_safi_ipv4_addr, tvb,
|
|
offset, ip_length, ENC_BIG_ENDIAN);
|
|
offset += ip_length;
|
|
|
|
proto_tree_add_item(tree, hf_bgp_mdt_nlri_safi_group_addr, tvb,
|
|
offset, ip_length, ENC_BIG_ENDIAN);
|
|
offset += ip_length;
|
|
|
|
return offset - orig_offset;
|
|
}
|
|
|
|
/*
|
|
* Decode an MPLS label stack
|
|
* XXX - We should change *buf to **buf, use ep_alloc() and drop the buflen
|
|
* argument.
|
|
*/
|
|
static guint
|
|
decode_MPLS_stack(tvbuff_t *tvb, gint offset, wmem_strbuf_t *stack_strbuf)
|
|
{
|
|
guint32 label_entry; /* an MPLS label enrty (label + COS field + stack bit */
|
|
gint indx; /* index for the label stack */
|
|
|
|
indx = offset ;
|
|
label_entry = 0x000000 ;
|
|
|
|
wmem_strbuf_truncate(stack_strbuf, 0);
|
|
|
|
while ((label_entry & 0x000001) == 0) {
|
|
|
|
label_entry = tvb_get_ntoh24(tvb, indx) ;
|
|
|
|
/* withdrawn routes may contain 0 or 0x800000 in the first label */
|
|
if((indx-offset)==0&&(label_entry==0||label_entry==0x800000)) {
|
|
wmem_strbuf_append(stack_strbuf, "0 (withdrawn)");
|
|
return (1);
|
|
}
|
|
|
|
wmem_strbuf_append_printf(stack_strbuf, "%u%s", label_entry >> 4,
|
|
((label_entry & 0x000001) == 0) ? "," : " (bottom)");
|
|
|
|
indx += 3 ;
|
|
|
|
if ((label_entry & 0x000001) == 0) {
|
|
/* real MPLS multi-label stack in BGP? - maybe later; for now, it must be a bogus packet */
|
|
wmem_strbuf_append(stack_strbuf, " (BOGUS: Bottom of Stack NOT set!)");
|
|
break;
|
|
}
|
|
}
|
|
|
|
return((indx - offset) / 3);
|
|
}
|
|
|
|
/*
|
|
* Decode a multiprotocol address
|
|
*/
|
|
|
|
static int
|
|
mp_addr_to_str (guint16 afi, guint8 safi, tvbuff_t *tvb, gint offset, wmem_strbuf_t *strbuf, gint nhlen)
|
|
{
|
|
int length; /* length of the address in byte */
|
|
guint32 ip4addr,ip4addr2; /* IPv4 address */
|
|
guint16 rd_type; /* Route Distinguisher type */
|
|
struct e_in6_addr ip6addr; /* IPv6 address */
|
|
|
|
switch (afi) {
|
|
case AFNUM_INET:
|
|
switch (safi) {
|
|
case SAFNUM_UNICAST:
|
|
case SAFNUM_MULCAST:
|
|
case SAFNUM_UNIMULC:
|
|
case SAFNUM_MPLS_LABEL:
|
|
case SAFNUM_ENCAPSULATION:
|
|
case SAFNUM_ROUTE_TARGET:
|
|
/* RTF NHop can be IPv4 or IPv6. They are differentiated by length of the field*/
|
|
length = nhlen;
|
|
if (nhlen == 4) {
|
|
wmem_strbuf_append(strbuf, tvb_ip_to_str(tvb, offset));
|
|
} else if (nhlen == 16) {
|
|
wmem_strbuf_append(strbuf, tvb_ip6_to_str(tvb, offset));
|
|
} else {
|
|
wmem_strbuf_append(strbuf, "Unknown address");
|
|
}
|
|
break;
|
|
case SAFNUM_TUNNEL:
|
|
length = 4 ;
|
|
ip4addr = tvb_get_ipv4(tvb, offset);
|
|
wmem_strbuf_append(strbuf, ip_to_str((guint8 *)&ip4addr));
|
|
break;
|
|
case SAFNUM_LAB_VPNUNICAST:
|
|
case SAFNUM_LAB_VPNMULCAST:
|
|
case SAFNUM_LAB_VPNUNIMULC:
|
|
rd_type=tvb_get_ntohs(tvb,offset) ;
|
|
wmem_strbuf_truncate(strbuf, 0);
|
|
switch (rd_type) {
|
|
case FORMAT_AS2_LOC:
|
|
length = 8 + sizeof(ip4addr);
|
|
ip4addr = tvb_get_ipv4(tvb, offset + 8); /* Next Hop */
|
|
wmem_strbuf_append_printf(strbuf, "Empty Label Stack RD=%u:%u IPv4=%s",
|
|
tvb_get_ntohs(tvb, offset + 2),
|
|
tvb_get_ntohl(tvb, offset + 4),
|
|
ip_to_str((guint8 *)&ip4addr));
|
|
break;
|
|
case FORMAT_IP_LOC:
|
|
length = 8 + sizeof(ip4addr);
|
|
ip4addr = tvb_get_ipv4(tvb, offset + 2); /* IP part of the RD */
|
|
ip4addr2 = tvb_get_ipv4(tvb, offset + 8); /* Next Hop */
|
|
wmem_strbuf_append_printf(strbuf, "Empty Label Stack RD=%s:%u IPv4=%s",
|
|
ip_to_str((guint8 *)&ip4addr),
|
|
tvb_get_ntohs(tvb, offset + 6),
|
|
ip_to_str((guint8 *)&ip4addr2));
|
|
break ;
|
|
case FORMAT_AS4_LOC:
|
|
length = 8 + sizeof(ip4addr);
|
|
ip4addr = tvb_get_ipv4(tvb, offset + 8); /* Next Hop */
|
|
wmem_strbuf_append_printf(strbuf, "Empty Label Stack RD=%u.%u:%u IPv4=%s",
|
|
tvb_get_ntohs(tvb, offset + 2),
|
|
tvb_get_ntohs(tvb, offset + 4),
|
|
tvb_get_ntohs(tvb, offset + 6),
|
|
ip_to_str((guint8 *)&ip4addr));
|
|
break ;
|
|
default:
|
|
length = 0 ;
|
|
wmem_strbuf_append_printf(strbuf, "Unknown (0x%04x) labeled VPN IPv4 address format",rd_type);
|
|
break;
|
|
} /* switch (rd_type) */
|
|
break;
|
|
default:
|
|
length = 0 ;
|
|
wmem_strbuf_truncate(strbuf, 0);
|
|
wmem_strbuf_append_printf(strbuf, "Unknown SAFI (%u) for AFI %u", safi, afi);
|
|
break;
|
|
} /* switch (safi) */
|
|
break;
|
|
case AFNUM_INET6:
|
|
wmem_strbuf_truncate(strbuf, 0);
|
|
switch (safi) {
|
|
case SAFNUM_UNICAST:
|
|
case SAFNUM_MULCAST:
|
|
case SAFNUM_UNIMULC:
|
|
case SAFNUM_MPLS_LABEL:
|
|
case SAFNUM_ENCAPSULATION:
|
|
case SAFNUM_TUNNEL:
|
|
length = 16 ;
|
|
tvb_get_ipv6(tvb, offset, &ip6addr);
|
|
wmem_strbuf_append_printf(strbuf, "%s", ip6_to_str(&ip6addr));
|
|
break;
|
|
case SAFNUM_LAB_VPNUNICAST:
|
|
case SAFNUM_LAB_VPNMULCAST:
|
|
case SAFNUM_LAB_VPNUNIMULC:
|
|
rd_type=tvb_get_ntohs(tvb,offset) ;
|
|
switch (rd_type) {
|
|
case FORMAT_AS2_LOC:
|
|
length = 8 + 16;
|
|
tvb_get_ipv6(tvb, offset + 8, &ip6addr); /* Next Hop */
|
|
wmem_strbuf_append_printf(strbuf, "Empty Label Stack RD=%u:%u IPv6=%s",
|
|
tvb_get_ntohs(tvb, offset + 2),
|
|
tvb_get_ntohl(tvb, offset + 4),
|
|
ip6_to_str(&ip6addr));
|
|
break;
|
|
case FORMAT_IP_LOC:
|
|
length = 8 + 16;
|
|
ip4addr = tvb_get_ipv4(tvb, offset + 2); /* IP part of the RD */
|
|
tvb_get_ipv6(tvb, offset + 8, &ip6addr); /* Next Hop */
|
|
wmem_strbuf_append_printf(strbuf, "Empty Label Stack RD=%s:%u IPv6=%s",
|
|
ip_to_str((guint8 *)&ip4addr),
|
|
tvb_get_ntohs(tvb, offset + 6),
|
|
ip6_to_str(&ip6addr));
|
|
break ;
|
|
case FORMAT_AS4_LOC:
|
|
length = 8 + 16;
|
|
tvb_get_ipv6(tvb, offset + 8, &ip6addr); /* Next Hop */
|
|
wmem_strbuf_append_printf(strbuf, "Empty Label Stack RD=%u:%u IPv6=%s",
|
|
tvb_get_ntohl(tvb, offset + 2),
|
|
tvb_get_ntohs(tvb, offset + 6),
|
|
ip6_to_str(&ip6addr));
|
|
break ;
|
|
default:
|
|
length = 0 ;
|
|
wmem_strbuf_append_printf(strbuf, "Unknown (0x%04x) labeled VPN IPv6 address format",rd_type);
|
|
break;
|
|
} /* switch (rd_type) */
|
|
break;
|
|
default:
|
|
length = 0 ;
|
|
wmem_strbuf_append_printf(strbuf, "Unknown SAFI (%u) for AFI %u", safi, afi);
|
|
break;
|
|
} /* switch (safi) */
|
|
break;
|
|
case AFNUM_L2VPN:
|
|
case AFNUM_L2VPN_OLD:
|
|
wmem_strbuf_truncate(strbuf, 0);
|
|
switch (safi) {
|
|
case SAFNUM_LAB_VPNUNICAST: /* only labeles prefixes do make sense */
|
|
case SAFNUM_LAB_VPNMULCAST:
|
|
case SAFNUM_LAB_VPNUNIMULC:
|
|
case SAFNUM_VPLS:
|
|
length = 4; /* the next-hop is simply an ipv4 addr */
|
|
ip4addr = tvb_get_ipv4(tvb, offset + 0);
|
|
wmem_strbuf_append_printf(strbuf, "IPv4=%s",
|
|
ip_to_str((guint8 *)&ip4addr));
|
|
break;
|
|
default:
|
|
length = 0 ;
|
|
wmem_strbuf_append_printf(strbuf, "Unknown SAFI (%u) for AFI %u", safi, afi);
|
|
break;
|
|
} /* switch (safi) */
|
|
break;
|
|
case AFNUM_LINK_STATE:
|
|
wmem_strbuf_truncate(strbuf, 0);
|
|
wmem_strbuf_append_printf(strbuf, "BGP-LS Next Hop address");
|
|
length=nhlen;
|
|
break;
|
|
default:
|
|
length = 0 ;
|
|
wmem_strbuf_truncate(strbuf, 0);
|
|
wmem_strbuf_append_printf(strbuf, "Unknown AFI (%u) value", afi);
|
|
break;
|
|
} /* switch (afi) */
|
|
return(length) ;
|
|
}
|
|
|
|
static int decode_bgp_link_node_descriptor(tvbuff_t *tvb, proto_tree *tree, gint offset, packet_info *pinfo, int length)
|
|
{
|
|
guint16 sub_length;
|
|
guint16 type;
|
|
guint16 diss_length;
|
|
|
|
proto_item* tlv_item;
|
|
proto_tree* tlv_tree;
|
|
|
|
diss_length = 0;
|
|
|
|
while (length > 0 ) {
|
|
if (length < 4) {
|
|
expert_add_info_format(pinfo, tree, &ei_bgp_ls_error,
|
|
"Unknown data in Link-State Link NLRI!");
|
|
diss_length += length;
|
|
break;
|
|
}
|
|
type = tvb_get_ntohs(tvb, offset);
|
|
sub_length = tvb_get_ntohs(tvb, offset + 2);
|
|
|
|
switch (type) {
|
|
case BGP_NLRI_TLV_AUTONOMOUS_SYSTEM:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_autonomous_system, tvb, offset, sub_length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_mp_reach_nlri);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
if (sub_length != BGP_NLRI_TLV_LEN_AUTONOMOUS_SYSTEM) {
|
|
expert_add_info_format(pinfo, tree, &ei_bgp_ls_error,
|
|
"Autonomous system TLV length should be %u bytes! (%u)",
|
|
BGP_NLRI_TLV_LEN_AUTONOMOUS_SYSTEM, sub_length);
|
|
break;
|
|
}
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_autonomous_system_id, tvb, offset + 4, 4, ENC_NA);
|
|
break;
|
|
case BGP_NLRI_TLV_BGP_LS_IDENTIFIER:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_bgp_ls_identifier, tvb, offset, sub_length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_mp_reach_nlri);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
if (sub_length != BGP_NLRI_TLV_LEN_BGP_LS_IDENTIFIER) {
|
|
expert_add_info_format(pinfo, tree, &ei_bgp_ls_error,
|
|
"BGP-LS TLV length should be %u bytes! (%u)",
|
|
BGP_NLRI_TLV_LEN_BGP_LS_IDENTIFIER, sub_length);
|
|
break;
|
|
}
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_bgp_ls_identifier_id, tvb, offset + 4, 4, ENC_NA);
|
|
break;
|
|
case BGP_NLRI_TLV_AREA_ID:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_area_id, tvb, offset, sub_length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_mp_reach_nlri);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
if (sub_length != BGP_NLRI_TLV_LEN_AREA_ID) {
|
|
expert_add_info_format(pinfo, tree, &ei_bgp_ls_error,
|
|
"Area ID TLV length should be %u bytes! (%u)",
|
|
BGP_NLRI_TLV_LEN_AREA_ID, sub_length);
|
|
break;
|
|
}
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_area_id_id, tvb, offset + 4, 4, ENC_NA);
|
|
break;
|
|
case BGP_NLRI_TLV_IGP_ROUTER_ID:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_igp_router, tvb, offset, sub_length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_mp_reach_nlri);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_igp_router_id, tvb, offset + 4, sub_length, ENC_NA);
|
|
break;
|
|
default:
|
|
expert_add_info_format(pinfo, tree, &ei_bgp_ls_error, "Undefined node Descriptor Sub-TLV type (%u)!", type);
|
|
}
|
|
|
|
length -= 4 + sub_length;
|
|
offset += 4 + sub_length;
|
|
diss_length += 4 + sub_length;
|
|
}
|
|
return diss_length;
|
|
}
|
|
|
|
|
|
/*
|
|
* Decode BGP Link State Local and Remote NODE Descriptors
|
|
*/
|
|
static int decode_bgp_link_node_nlri_tlvs(tvbuff_t *tvb, proto_tree *tree, gint offset, packet_info *pinfo, guint16 expected_sub_tlv)
|
|
{
|
|
guint16 length;
|
|
guint16 type;
|
|
proto_tree* tlv_tree;
|
|
proto_item* tlv_item;
|
|
|
|
type = tvb_get_ntohs(tvb, offset);
|
|
length = tvb_get_ntohs(tvb, offset + 2);
|
|
|
|
if (expected_sub_tlv != type) {
|
|
expert_add_info_format(pinfo, tree, &ei_bgp_ls_error, "Expected/actual tlv mismatch, expected: %u, actual: %u", expected_sub_tlv, type);
|
|
}
|
|
|
|
switch(type){
|
|
|
|
/*local and remote node descriptors */
|
|
case BGP_NLRI_TLV_LOCAL_NODE_DESCRIPTORS:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_local_node_descriptors, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_mp_reach_nlri);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
decode_bgp_link_node_descriptor(tvb, tlv_tree, offset + 4, pinfo, length);
|
|
break;
|
|
|
|
case BGP_NLRI_TLV_REMOTE_NODE_DESCRIPTORS:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_remote_node_descriptors, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_mp_reach_nlri);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
decode_bgp_link_node_descriptor(tvb, tlv_tree, offset + 4, pinfo, length);
|
|
break;
|
|
}
|
|
|
|
return length +4 ;
|
|
}
|
|
|
|
/*
|
|
* Dissect Link and Node NLRI common fields (Protocol-ID, Identifier, Local Node Desc.)
|
|
*/
|
|
static int decode_bgp_link_node_nlri_common_fields(tvbuff_t *tvb,
|
|
proto_tree *tree, gint offset, packet_info *pinfo, int length) {
|
|
int dissected_length;
|
|
int tmp_length;
|
|
|
|
/* dissect Link NLRI header */
|
|
if (length < 12) {
|
|
expert_add_info_format(pinfo, tree, &ei_bgp_ls_error,
|
|
"Link State NLRI length is lower than 12 bytes! (%d)", length);
|
|
return length;
|
|
}
|
|
|
|
proto_tree_add_item(tree, hf_bgp_ls_nlri_node_protocol_id, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tree, hf_bgp_ls_nlri_node_identifier, tvb, offset + 1, 8, ENC_BIG_ENDIAN);
|
|
|
|
dissected_length = 9;
|
|
offset += dissected_length;
|
|
length -= dissected_length;
|
|
|
|
/* dissect Local Node Descriptors TLV */
|
|
if (length > 0 && length < 4) {
|
|
expert_add_info_format(pinfo, tree, &ei_bgp_ls_error,
|
|
"Unknown data in Link-State Link NLRI! length = %d bytes", length);
|
|
return dissected_length;
|
|
}
|
|
if (length < 1)
|
|
return dissected_length;
|
|
|
|
tmp_length = decode_bgp_link_node_nlri_tlvs(tvb, tree, offset, pinfo,
|
|
BGP_NLRI_TLV_LOCAL_NODE_DESCRIPTORS);
|
|
if (tmp_length < 0) {
|
|
return -1;
|
|
}
|
|
dissected_length += tmp_length;
|
|
|
|
return dissected_length;
|
|
}
|
|
|
|
|
|
/*
|
|
* Decode Link Descriptors
|
|
*/
|
|
static int decode_bgp_link_nlri_link_descriptors(tvbuff_t *tvb,
|
|
proto_tree *tree, gint offset, packet_info *pinfo, int length) {
|
|
|
|
guint16 sub_length;
|
|
guint16 type;
|
|
guint16 diss_length;
|
|
guint16 tmp16;
|
|
|
|
proto_item* tlv_item;
|
|
proto_tree* tlv_tree;
|
|
proto_item* tlv_sub_item;
|
|
proto_tree* tlv_sub_tree;
|
|
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_nlri_link_descriptors_tlv, tvb, offset, length + 4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_mp_reach_nlri);
|
|
|
|
diss_length = 0;
|
|
while (length > 0) {
|
|
if (length < 4) {
|
|
expert_add_info_format(pinfo, tree, &ei_bgp_ls_error,
|
|
"Unknown data in Link-State Link NLRI!");
|
|
diss_length += length;
|
|
break;
|
|
}
|
|
|
|
type = tvb_get_ntohs(tvb, offset);
|
|
sub_length = tvb_get_ntohs(tvb, offset + 2);
|
|
switch (type) {
|
|
case BGP_NLRI_TLV_LINK_LOCAL_REMOTE_IDENTIFIERS:
|
|
if(sub_length != BGP_NLRI_TLV_LEN_LINK_LOCAL_REMOTE_IDENTIFIERS){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error,
|
|
"Unexpected Link Local/Remote Identifiers TLV's length (%u), it must be %u bytes!",
|
|
sub_length, BGP_NLRI_TLV_LEN_LINK_LOCAL_REMOTE_IDENTIFIERS);
|
|
return -1;
|
|
}
|
|
tlv_sub_item = proto_tree_add_item(tlv_tree,
|
|
hf_bgp_ls_tlv_link_local_remote_identifiers, tvb, offset,
|
|
sub_length + 4, ENC_NA);
|
|
tlv_sub_tree = proto_item_add_subtree(tlv_sub_item, ett_bgp_mp_reach_nlri);
|
|
break;
|
|
|
|
case BGP_NLRI_TLV_IPV4_INTERFACE_ADDRESS:
|
|
if(sub_length != BGP_NLRI_TLV_LEN_IPV4_INTERFACE_ADDRESS){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error,
|
|
"Unexpected IPv4 Interface Address TLV's length (%u), it must be %u bytes!",
|
|
sub_length, BGP_NLRI_TLV_LEN_IPV4_INTERFACE_ADDRESS);
|
|
return -1;
|
|
}
|
|
tlv_sub_item = proto_tree_add_item(tlv_tree,
|
|
hf_bgp_ls_tlv_ipv4_interface_address, tvb, offset,
|
|
sub_length + 4, ENC_NA);
|
|
tlv_sub_tree = proto_item_add_subtree(tlv_sub_item, ett_bgp_mp_reach_nlri);
|
|
break;
|
|
|
|
case BGP_NLRI_TLV_IPV4_NEIGHBOR_ADDRESS:
|
|
if(sub_length != BGP_NLRI_TLV_LEN_IPV4_NEIGHBOR_ADDRESS){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error,
|
|
"Unexpected IPv4 Neighbor Address TLV's length (%u), it must be %u bytes!",
|
|
sub_length, BGP_NLRI_TLV_LEN_IPV4_NEIGHBOR_ADDRESS);
|
|
return -1;
|
|
}
|
|
tlv_sub_item = proto_tree_add_item(tlv_tree,
|
|
hf_bgp_ls_tlv_ipv4_neighbor_address, tvb, offset,
|
|
sub_length + 4, ENC_NA);
|
|
tlv_sub_tree = proto_item_add_subtree(tlv_sub_item, ett_bgp_mp_reach_nlri);
|
|
break;
|
|
|
|
case BGP_NLRI_TLV_IPV6_INTERFACE_ADDRESS:
|
|
if(sub_length != BGP_NLRI_TLV_LEN_IPV6_INTERFACE_ADDRESS){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error,
|
|
"Unexpected IPv6 Interface Address TLV's length (%u), it must be %u bytes!",
|
|
sub_length, BGP_NLRI_TLV_LEN_IPV6_INTERFACE_ADDRESS);
|
|
return -1;
|
|
}
|
|
tlv_sub_item = proto_tree_add_item(tlv_tree,
|
|
hf_bgp_ls_tlv_ipv6_interface_address, tvb, offset,
|
|
sub_length + 4, ENC_NA);
|
|
tlv_sub_tree = proto_item_add_subtree(tlv_sub_item, ett_bgp_mp_reach_nlri);
|
|
break;
|
|
|
|
case BGP_NLRI_TLV_IPV6_NEIGHBOR_ADDRESS:
|
|
if(sub_length != BGP_NLRI_TLV_IPV6_NEIGHBOR_ADDRESS){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error,
|
|
"Unexpected IPv6 Neighbor Address TLV's length (%u), it must be %u bytes!",
|
|
sub_length, BGP_NLRI_TLV_IPV6_NEIGHBOR_ADDRESS);
|
|
return -1;
|
|
}
|
|
tlv_sub_item = proto_tree_add_item(tlv_tree,
|
|
hf_bgp_ls_tlv_ipv6_neighbor_address, tvb, offset,
|
|
sub_length + 4, ENC_NA);
|
|
tlv_sub_tree = proto_item_add_subtree(tlv_sub_item, ett_bgp_mp_reach_nlri);
|
|
break;
|
|
|
|
case BGP_NLRI_TLV_MULTI_TOPOLOGY_ID:
|
|
if(sub_length != BGP_NLRI_TLV_LEN_MULTI_TOPOLOGY_ID){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error,
|
|
"Unexpected Multi Topology ID TLV's length (%u), it must be %u bytes!",
|
|
sub_length, BGP_NLRI_TLV_LEN_MULTI_TOPOLOGY_ID);
|
|
return -1;
|
|
}
|
|
tlv_sub_item = proto_tree_add_item(tlv_tree,
|
|
hf_bgp_ls_tlv_multi_topology_id, tvb, offset, sub_length + 4,
|
|
ENC_NA);
|
|
tlv_sub_tree = proto_item_add_subtree(tlv_sub_item, ett_bgp_mp_reach_nlri);
|
|
break;
|
|
|
|
default:
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error,
|
|
"Unknown Link Descriptor TLV Code (%u)!", type);
|
|
return -1;
|
|
}
|
|
|
|
proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
|
|
switch (type) {
|
|
case BGP_NLRI_TLV_LINK_LOCAL_REMOTE_IDENTIFIERS:
|
|
proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_nlri_link_local_identifier, tvb, offset + 4, 4, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_nlri_link_remote_identifier, tvb, offset + 8, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case BGP_NLRI_TLV_IPV4_INTERFACE_ADDRESS:
|
|
proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_nlri_ipv4_interface_address, tvb, offset + 4,
|
|
BGP_NLRI_TLV_LEN_IPV4_INTERFACE_ADDRESS, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case BGP_NLRI_TLV_IPV4_NEIGHBOR_ADDRESS:
|
|
proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_nlri_ipv4_neighbor_address, tvb, offset + 4,
|
|
BGP_NLRI_TLV_LEN_IPV4_INTERFACE_ADDRESS, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case BGP_NLRI_TLV_IPV6_INTERFACE_ADDRESS:
|
|
proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_nlri_ipv6_interface_address, tvb, offset + 4,
|
|
BGP_NLRI_TLV_LEN_IPV6_INTERFACE_ADDRESS, ENC_NA);
|
|
break;
|
|
|
|
case BGP_NLRI_TLV_IPV6_NEIGHBOR_ADDRESS:
|
|
proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_nlri_ipv6_neighbor_address, tvb, offset + 4,
|
|
BGP_NLRI_TLV_LEN_IPV6_INTERFACE_ADDRESS, ENC_NA);
|
|
break;
|
|
|
|
case BGP_NLRI_TLV_MULTI_TOPOLOGY_ID:
|
|
tmp16 = tvb_get_ntohs(tvb, offset + 4);
|
|
tmp16 >>= 12;
|
|
if(tmp16){
|
|
expert_add_info_format(pinfo, tlv_sub_tree, &ei_bgp_ls_error, "Reserved bits of Multi Topology ID must be set to zero! (%u)", tmp16);
|
|
}
|
|
proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_nlri_multi_topology_id, tvb, offset + 4,
|
|
BGP_NLRI_TLV_LEN_MULTI_TOPOLOGY_ID, ENC_BIG_ENDIAN);
|
|
break;
|
|
}
|
|
|
|
length -= 4 + sub_length;
|
|
offset += 4 + sub_length;
|
|
diss_length += 4 + sub_length;
|
|
}
|
|
return diss_length;
|
|
}
|
|
|
|
/*
|
|
* Decode Prefix Descriptors
|
|
*/
|
|
static int decode_bgp_link_nlri_prefix_descriptors(tvbuff_t *tvb,
|
|
proto_tree *tree, gint offset, packet_info *pinfo, int length) {
|
|
|
|
guint16 sub_length;
|
|
guint16 type;
|
|
guint16 diss_length;
|
|
guint8 tmp8;
|
|
guint16 tmp16;
|
|
|
|
proto_item* tlv_item;
|
|
proto_tree* tlv_tree;
|
|
proto_item* tlv_sub_item;
|
|
proto_tree* tlv_sub_tree;
|
|
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_nlri_prefix_descriptors_tlv, tvb, offset, length + 4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_mp_reach_nlri);
|
|
|
|
diss_length = 0;
|
|
while (length > 0) {
|
|
if (length < 4) {
|
|
expert_add_info_format(pinfo, tree, &ei_bgp_ls_error,
|
|
"Unknown data in Link-State Link NLRI!");
|
|
diss_length += length;
|
|
break;
|
|
}
|
|
|
|
type = tvb_get_ntohs(tvb, offset);
|
|
sub_length = tvb_get_ntohs(tvb, offset + 2);
|
|
switch (type) {
|
|
case BGP_NLRI_TLV_MULTI_TOPOLOGY_ID:
|
|
if(sub_length != BGP_NLRI_TLV_LEN_MULTI_TOPOLOGY_ID){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error,
|
|
"Unexpected Multi Topology ID TLV's length (%u), it must be %u bytes!",
|
|
sub_length, BGP_NLRI_TLV_LEN_MULTI_TOPOLOGY_ID);
|
|
return -1;
|
|
}
|
|
tlv_sub_item = proto_tree_add_item(tlv_tree,
|
|
hf_bgp_ls_tlv_multi_topology_id, tvb, offset, sub_length + 4,
|
|
ENC_NA);
|
|
tlv_sub_tree = proto_item_add_subtree(tlv_sub_item, ett_bgp_mp_reach_nlri);
|
|
break;
|
|
|
|
case BGP_NLRI_TLV_OSPF_ROUTE_TYPE:
|
|
tlv_sub_item = proto_tree_add_item(tlv_tree,
|
|
hf_bgp_ls_tlv_ospf_route_type, tvb, offset, sub_length + 4,
|
|
ENC_NA);
|
|
tlv_sub_tree = proto_item_add_subtree(tlv_sub_item, ett_bgp_mp_reach_nlri);
|
|
break;
|
|
case BGP_NLRI_TLV_IP_REACHABILITY_INFORMATION:
|
|
tlv_sub_item = proto_tree_add_item(tlv_tree,
|
|
hf_bgp_ls_tlv_ip_reachability_information, tvb, offset, sub_length + 4,
|
|
ENC_NA);
|
|
tlv_sub_tree = proto_item_add_subtree(tlv_sub_item, ett_bgp_mp_reach_nlri);
|
|
break;
|
|
|
|
default:
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error,
|
|
"Unknown Prefix Descriptor TLV Code (%u)!", type);
|
|
return -1;
|
|
}
|
|
|
|
proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
|
|
switch (type) {
|
|
case BGP_NLRI_TLV_MULTI_TOPOLOGY_ID:
|
|
tmp16 = tvb_get_ntohs(tvb, offset + 4);
|
|
tmp16 >>= 12;
|
|
if(tmp16){
|
|
expert_add_info_format(pinfo, tlv_sub_tree, &ei_bgp_ls_error, "Reserved bits of Multi Topology ID must be set to zero! (%u)", tmp16);
|
|
}
|
|
proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_nlri_multi_topology_id, tvb, offset + 4,
|
|
BGP_NLRI_TLV_LEN_MULTI_TOPOLOGY_ID, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case BGP_NLRI_TLV_OSPF_ROUTE_TYPE:
|
|
|
|
if (sub_length != 1) {
|
|
expert_add_info_format(pinfo, tlv_sub_tree, &ei_bgp_ls_error, "OSPF Route Type length must be \"1\"");
|
|
break;
|
|
}
|
|
proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_nlri_ospf_route_type, tvb, offset + 4, 1, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case BGP_NLRI_TLV_IP_REACHABILITY_INFORMATION:
|
|
tmp8 = tvb_get_guint8(tvb, offset + 4);
|
|
proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_nlri_ip_reachability_prefix_length, tvb, offset + 4, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_nlri_ip_reachability_prefix_ip, tvb, offset + 5, (tmp8 / 8), ENC_NA);
|
|
break;
|
|
}
|
|
|
|
length -= 4 + sub_length;
|
|
offset += 4 + sub_length;
|
|
diss_length += 4 + sub_length;
|
|
}
|
|
return diss_length;
|
|
}
|
|
|
|
/*
|
|
* Decode a multiprotocol prefix
|
|
*/
|
|
static int
|
|
decode_link_state_attribute_tlv(proto_tree *tree, tvbuff_t *tvb, gint offset, packet_info *pinfo)
|
|
{
|
|
guint16 type;
|
|
guint16 length;
|
|
guint8 tmp8;
|
|
guint16 tmp16;
|
|
guint32 tmp32;
|
|
gfloat tmp_float;
|
|
guint32 mask;
|
|
int n;
|
|
|
|
proto_item* tlv_item;
|
|
proto_tree* tlv_tree;
|
|
proto_item* tlv_sub_item;
|
|
proto_tree* tlv_sub_tree;
|
|
|
|
type = tvb_get_ntohs(tvb, offset);
|
|
length = tvb_get_ntohs(tvb, offset + 2);
|
|
|
|
switch (type) {
|
|
|
|
/* NODE ATTRIBUTE TLVs */
|
|
case BGP_NLRI_TLV_MULTI_TOPOLOGY_ID:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_multi_topology_id, tvb, offset, length + 4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
|
|
for (n = 0; n < (length / BGP_NLRI_TLV_LEN_MULTI_TOPOLOGY_ID); n++) {
|
|
tmp16 = tvb_get_ntohs(tvb, offset + 4 + (n * BGP_NLRI_TLV_LEN_MULTI_TOPOLOGY_ID));
|
|
tmp16 >>= 12;
|
|
if(tmp16){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Reserved bits of Multi Topology ID must be set to zero! (%u)", tmp16);
|
|
}
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_nlri_multi_topology_id, tvb, offset + 4 + (n * BGP_NLRI_TLV_LEN_MULTI_TOPOLOGY_ID),
|
|
BGP_NLRI_TLV_LEN_MULTI_TOPOLOGY_ID, ENC_BIG_ENDIAN);
|
|
}
|
|
break;
|
|
|
|
case BGP_NLRI_TLV_NODE_FLAG_BITS:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_node_flags_bits, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
if(length != BGP_NLRI_TLV_LEN_NODE_FLAG_BITS){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected Node Flags Bits TLV's length (%u), it must be %u bytes!",
|
|
length, BGP_NLRI_TLV_LEN_NODE_FLAG_BITS);
|
|
break;
|
|
}
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
tmp8 = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_boolean(tlv_tree, hf_bgp_ls_node_flag_bits_overload, tvb, offset, 1, tmp8);
|
|
proto_tree_add_boolean(tlv_tree, hf_bgp_ls_node_flag_bits_attached, tvb, offset, 1, tmp8);
|
|
proto_tree_add_boolean(tlv_tree, hf_bgp_ls_node_flag_bits_external, tvb, offset, 1, tmp8);
|
|
proto_tree_add_boolean(tlv_tree, hf_bgp_ls_node_flag_bits_abr, tvb, offset, 1, tmp8);
|
|
tmp8 &= 0x0f;
|
|
if(tmp8){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Reserved flag bits are not set to zero (%u).", tmp8);
|
|
}
|
|
break;
|
|
|
|
case BGP_NLRI_TLV_OPAQUE_NODE_PROPERTIES:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_opaque_node_properties, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_opaque_node_properties_value, tvb, offset + 4, length, ENC_NA);
|
|
break;
|
|
|
|
case BGP_NLRI_TLV_NODE_NAME:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_node_name, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_node_name_value, tvb, offset + 4, length, ENC_ASCII|ENC_NA);
|
|
break;
|
|
|
|
case BGP_NLRI_TLV_IS_IS_AREA_IDENTIFIER:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_is_is_area_identifier, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_is_is_area_identifier_value, tvb, offset + 4, length, ENC_NA);
|
|
break;
|
|
|
|
/* NODE & LINK ATTRIBUTE TLVs */
|
|
case BGP_NLRI_TLV_IPV4_ROUTER_ID_OF_LOCAL_NODE:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_ipv4_router_id_of_local_node, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
if(length != BGP_NLRI_TLV_LEN_IPV4_ROUTER_ID_OF_LOCAL_NODE){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected IPv4 Router-ID TLV's length (%u), it must be %u bytes!",
|
|
length, BGP_NLRI_TLV_LEN_IPV4_ROUTER_ID_OF_LOCAL_NODE);
|
|
break;
|
|
}
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_ipv4_router_id_value, tvb, offset + 4, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
case BGP_NLRI_TLV_IPV6_ROUTER_ID_OF_LOCAL_NODE:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_ipv6_router_id_of_local_node, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
if(length != BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID_OF_LOCAL_NODE){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected IPv6 Router-ID TLV's length (%u), it must be %u bytes!",
|
|
length, BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID_OF_LOCAL_NODE);
|
|
break;
|
|
}
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_ipv6_router_id_value, tvb, offset + 4, BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID_OF_LOCAL_NODE, ENC_NA);
|
|
break;
|
|
|
|
/* Link Attribute TLVs */
|
|
case BGP_NLRI_TLV_IPV4_ROUTER_ID_OF_REMOTE_NODE:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_ipv4_router_id_of_remote_node, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
if(length != BGP_NLRI_TLV_LEN_IPV4_ROUTER_ID_OF_REMOTE_NODE){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected IPv4 Router-ID TLV's length (%u), it must be %u bytes!",
|
|
length, BGP_NLRI_TLV_LEN_IPV4_ROUTER_ID_OF_REMOTE_NODE);
|
|
break;
|
|
}
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_ipv4_router_id_value, tvb, offset + 4, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
case BGP_NLRI_TLV_IPV6_ROUTER_ID_OF_REMOTE_NODE:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_ipv6_router_id_of_remote_node, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
if(length != BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID_OF_REMOTE_NODE){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected IPv6 Router-ID TLV's length (%u), it must be %u bytes!",
|
|
length, BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID_OF_REMOTE_NODE);
|
|
break;
|
|
}
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_ipv6_router_id_value, tvb, offset + 4, BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID_OF_REMOTE_NODE, ENC_NA);
|
|
break;
|
|
|
|
case BGP_NLRI_TLV_ADMINISTRATIVE_GROUP_COLOR:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_administrative_group_color, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
if(length != BGP_NLRI_TLV_LEN_ADMINISTRATIVE_GROUP_COLOR){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected Administrative group (color) TLV's length (%u), it must be %u bytes!",
|
|
length, BGP_NLRI_TLV_LEN_ADMINISTRATIVE_GROUP_COLOR);
|
|
break;
|
|
}
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
tmp32 = tvb_get_ntohl(tvb, offset + 4);
|
|
tlv_sub_item = proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_administrative_group_color_value, tvb, offset + 4, 4, ENC_BIG_ENDIAN);
|
|
tlv_sub_tree = proto_item_add_subtree(tlv_sub_item, ett_bgp_prefix);
|
|
mask = 1;
|
|
for(n = 0; n<32; n++){
|
|
if( tmp32 & mask ) proto_tree_add_text(tlv_sub_tree, tvb, offset + 4, 4, "group %u", n);
|
|
mask <<= 1;
|
|
}
|
|
break;
|
|
|
|
case BGP_NLRI_TLV_MAX_LINK_BANDWIDTH:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_max_link_bandwidth, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
if(length != BGP_NLRI_TLV_LEN_MAX_LINK_BANDWIDTH){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected Maximum link bandwidth TLV's length (%u), it must be %u bytes!",
|
|
length, BGP_NLRI_TLV_LEN_MAX_LINK_BANDWIDTH);
|
|
break;
|
|
}
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
tmp_float = tvb_get_ntohieee_float(tvb, offset + 4)*8/1000000;
|
|
proto_tree_add_float_format(tlv_tree, hf_bgp_ls_bandwidth_value, tvb, offset + 4, 4, tmp_float, "Maximum link bandwidth: %.2f Mbps", tmp_float);
|
|
break;
|
|
|
|
case BGP_NLRI_TLV_MAX_RESERVABLE_LINK_BANDWIDTH:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_max_reservable_link_bandwidth, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
if(length != BGP_NLRI_TLV_LEN_MAX_RESERVABLE_LINK_BANDWIDTH){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected Maximum reservable link bandwidth TLV's length (%u), it must be %u bytes!",
|
|
length, BGP_NLRI_TLV_LEN_MAX_RESERVABLE_LINK_BANDWIDTH);
|
|
break;
|
|
}
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
tmp_float = tvb_get_ntohieee_float(tvb, offset + 4)*8/1000000;
|
|
proto_tree_add_float_format(tlv_tree, hf_bgp_ls_bandwidth_value, tvb, offset + 4, 4, tmp_float, "Maximum reservable link bandwidth: %.2f Mbps", tmp_float);
|
|
break;
|
|
|
|
case BGP_NLRI_TLV_UNRESERVED_BANDWIDTH:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_unreserved_bandwidth, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
if(length != BGP_NLRI_TLV_LEN_UNRESERVED_BANDWIDTH){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected Unreserved bandwidth TLV's length (%u), it must be %u bytes!",
|
|
length, BGP_NLRI_TLV_LEN_UNRESERVED_BANDWIDTH);
|
|
break;
|
|
}
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
for(n = 0; n<8; n++){
|
|
tmp_float = tvb_get_ntohieee_float(tvb, offset + 4 + (4 * n))*8/1000000;
|
|
tlv_sub_item = proto_tree_add_float_format(tlv_tree, hf_bgp_ls_bandwidth_value, tvb, offset + 4 + (4 * n), 4, tmp_float, "Unreserved Bandwidth: %.2f Mbps", tmp_float);
|
|
proto_item_prepend_text(tlv_sub_item, "Priority %u, ", n);
|
|
}
|
|
break;
|
|
|
|
case BGP_NLRI_TLV_TE_DEFAULT_METRIC:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_te_default_metric, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
|
|
if(length != BGP_NLRI_TLV_LEN_TE_DEFAULT_METRIC){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected Metric TLV's length (%u), it must be %u bytes!",
|
|
length, BGP_NLRI_TLV_LEN_METRIC);
|
|
break;
|
|
}
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_te_default_metric_value, tvb, offset + 4, 3, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case BGP_NLRI_TLV_LINK_PROTECTION_TYPE:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_link_protection_type, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
if(length != BGP_NLRI_TLV_LEN_LINK_PROTECTION_TYPE){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected Link Protection Type TLV's length (%u), it must be %u bytes!",
|
|
length, BGP_NLRI_TLV_LEN_LINK_PROTECTION_TYPE);
|
|
break;
|
|
}
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
tmp8 = tvb_get_guint8(tvb, offset + 4);
|
|
tlv_sub_item = proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_link_protection_type_value, tvb, offset + 4, 1, ENC_NA);
|
|
tlv_sub_tree = proto_item_add_subtree(tlv_sub_item, ett_bgp_mp_reach_nlri);
|
|
proto_tree_add_boolean(tlv_sub_tree, hf_bgp_ls_link_protection_type_extra_traffic, tvb, offset + 4, 1, tmp8);
|
|
proto_tree_add_boolean(tlv_sub_tree, hf_bgp_ls_link_protection_type_unprotected, tvb, offset + 4, 1, tmp8);
|
|
proto_tree_add_boolean(tlv_sub_tree, hf_bgp_ls_link_protection_type_shared, tvb, offset + 4, 1, tmp8);
|
|
proto_tree_add_boolean(tlv_sub_tree, hf_bgp_ls_link_protection_type_dedicated_1to1, tvb, offset + 4, 1, tmp8);
|
|
proto_tree_add_boolean(tlv_sub_tree, hf_bgp_ls_link_protection_type_dedicated_1plus1, tvb, offset + 4, 1, tmp8);
|
|
proto_tree_add_boolean(tlv_sub_tree, hf_bgp_ls_link_protection_type_enhanced, tvb, offset + 4, 1, tmp8);
|
|
tmp8 >>= 6;
|
|
if(tmp8){
|
|
expert_add_info_format(pinfo, tlv_sub_tree, &ei_bgp_ls_error, "Reserved Protection Capabilities bits are not set to zero (%u).", tmp8);
|
|
}
|
|
tmp8 = tvb_get_guint8(tvb, offset + 4 + 1);
|
|
if(tmp8){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Reserved field is not set to zero. (%u)", tmp8);
|
|
}
|
|
break;
|
|
case BGP_NLRI_TLV_MPLS_PROTOCOL_MASK:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_mpls_protocol_mask, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
if(length != BGP_NLRI_TLV_LEN_MPLS_PROTOCOL_MASK){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected MPLS Protocol Mask TLV's length (%u), it must be %u bytes!",
|
|
length, BGP_NLRI_TLV_LEN_MPLS_PROTOCOL_MASK);
|
|
break;
|
|
}
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
tmp8 = tvb_get_guint8(tvb, offset + 4);
|
|
proto_tree_add_boolean(tlv_tree, hf_bgp_ls_mpls_protocol_mask_flag_l, tvb, offset + 4, 1, tmp8);
|
|
proto_tree_add_boolean(tlv_tree, hf_bgp_ls_mpls_protocol_mask_flag_r, tvb, offset + 4, 1, tmp8);
|
|
tmp8 &= 0x3f;
|
|
if(tmp8){
|
|
proto_tree_add_expert_format(tlv_tree, pinfo, &ei_bgp_ls_error, tvb, offset + 4, 1,
|
|
"Reserved flags are not set to zero (%u).", tmp8);
|
|
}
|
|
break;
|
|
case BGP_NLRI_TLV_METRIC:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_metric, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
if(length != BGP_NLRI_TLV_LEN_METRIC){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected Metric TLV's length (%u), it must be %u bytes!",
|
|
length, BGP_NLRI_TLV_LEN_METRIC);
|
|
break;
|
|
}
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_metric_value, tvb, offset + 4, 3, ENC_BIG_ENDIAN);
|
|
break;
|
|
case BGP_NLRI_TLV_SHARED_RISK_LINK_GROUP:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_shared_risk_link_group, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
tmp16 = length;
|
|
n = 0;
|
|
while(tmp16 > 0){
|
|
if(tmp16 < 4) {
|
|
proto_tree_add_expert_format(tlv_tree, pinfo, &ei_bgp_ls_error,
|
|
tvb, offset + 4 + (n * 4), tmp16,
|
|
"Shared Risk Link Group Value must be 4 bytes long (%u).", tmp16);
|
|
break;
|
|
}
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_shared_risk_link_group_value, tvb, offset + 4 + (n * 4), 4, ENC_BIG_ENDIAN);
|
|
tmp16 -= 4;
|
|
n++;
|
|
}
|
|
break;
|
|
case BGP_NLRI_TLV_OPAQUE_LINK_ATTRIBUTE:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_opaque_link_attribute, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_opaque_link_attribute_value, tvb, offset + 4, length, ENC_NA);
|
|
break;
|
|
case BGP_NLRI_TLV_LINK_NAME_ATTRIBUTE:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_link_name_attribute, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_link_name_attribute_value, tvb, offset + 4, length, ENC_ASCII|ENC_NA);
|
|
break;
|
|
case BGP_NLRI_TLV_IGP_FLAGS:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_igp_flags, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
if(length != BGP_NLRI_TLV_LEN_IGP_FLAGS){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected IGP Flags TLV's length (%u), it must be %u bytes!",
|
|
length, BGP_NLRI_TLV_IGP_FLAGS);
|
|
break;
|
|
}
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
tmp8 = tvb_get_guint8(tvb, offset + 4);
|
|
proto_tree_add_boolean(tlv_tree, hf_bgp_ls_igp_flags_flag_d, tvb, offset + 4, 1, tmp8);
|
|
tmp8 &= 0x7F;
|
|
if(tmp8){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Reserved flags are not set to zero (%u).", tmp8);
|
|
}
|
|
break;
|
|
case BGP_NLRI_TLV_ROUTE_TAG:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_route_tag, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
if(length % 4 != 0) {
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected Route Tag TLV's length (%u mod 4 != 0) ",
|
|
length);
|
|
break;
|
|
}
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
tmp16 = length;
|
|
n = 0;
|
|
while(tmp16){
|
|
if(tmp16 < 4) {
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Route Tag must be 4 bytes long (%u).", tmp16);
|
|
break;
|
|
}
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_route_tag_value, tvb, offset + 4 + (n * 4), 4, ENC_BIG_ENDIAN);
|
|
tmp16 -= 4;
|
|
n++;
|
|
}
|
|
break;
|
|
case BGP_NLRI_TLV_EXTENDED_TAG:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_route_extended_tag, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
if(length % 8 != 0) {
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected Route Extended Tag TLV's length (%u mod 8 != 0) ",
|
|
length);
|
|
break;
|
|
}
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
tmp16 = length;
|
|
n = 0;
|
|
while(tmp16){
|
|
if(tmp16 < 8) {
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Route Extended Tag must be 8 bytes long (%u).", tmp16);
|
|
break;
|
|
}
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_route_extended_tag_value, tvb, offset + 4 + (n * 8), 8, ENC_BIG_ENDIAN);
|
|
tmp16 -= 8;
|
|
n++;
|
|
}
|
|
break;
|
|
case BGP_NLRI_TLV_PREFIX_METRIC:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_prefix_metric, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
if(length != BGP_NLRI_TLV_LEN_PREFIX_METRIC){
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected Prefix Metric TLV's length (%u), it must be %u bytes!",
|
|
length, BGP_NLRI_TLV_LEN_PREFIX_METRIC);
|
|
break;
|
|
}
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_prefix_metric_value, tvb, offset + 4, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
case BGP_NLRI_TLV_OSPF_FORWARDING_ADDRESS:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_ospf_forwarding_address, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
if (length == 4) {
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_ospf_forwarding_address_ipv4_address, tvb, offset + 4, length, ENC_BIG_ENDIAN);
|
|
}
|
|
else if (length == 16) {
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_ospf_forwarding_address_ipv6_address, tvb, offset + 4, length, ENC_NA);
|
|
}
|
|
else {
|
|
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected Prefix Metric TLV's length (%u), it must be 4 or 16 bytes!", length);
|
|
break;
|
|
}
|
|
break;
|
|
case BGP_NLRI_TLV_OPAQUE_PREFIX_ATTRIBUTE:
|
|
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_opaque_prefix_attribute, tvb, offset, length+4, ENC_NA);
|
|
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tlv_tree, hf_bgp_ls_opaque_prefix_attribute_value, tvb, offset + 4, length, ENC_NA);
|
|
break;
|
|
default:
|
|
expert_add_info_format(pinfo, tree, &ei_bgp_ls_error,
|
|
"Unknown Prefix Descriptor TLV Code (%u)!", type);
|
|
break;
|
|
}
|
|
return length + 4;
|
|
}
|
|
|
|
/*
|
|
* Decode a multiprotocol prefix
|
|
*/
|
|
static int
|
|
decode_prefix_MP(proto_tree *tree, int hf_addr4, int hf_addr6,
|
|
guint16 afi, guint8 safi, tvbuff_t *tvb, gint offset,
|
|
const char *tag, packet_info *pinfo)
|
|
{
|
|
int start_offset = offset;
|
|
proto_item *ti;
|
|
proto_tree *prefix_tree;
|
|
proto_item *nlri_ti;
|
|
proto_tree *nlri_tree;
|
|
proto_item *disting_item;
|
|
proto_tree *disting_tree;
|
|
|
|
int total_length; /* length of the entire item */
|
|
int length; /* length of the prefix address, in bytes */
|
|
int tmp_length;
|
|
guint plen; /* length of the prefix address, in bits */
|
|
guint labnum; /* number of labels */
|
|
guint16 tnl_id; /* Tunnel Identifier */
|
|
int ce_id,labblk_off,labblk_size;
|
|
union {
|
|
guint8 addr_bytes[4];
|
|
guint32 addr;
|
|
} ip4addr, ip4addr2; /* IPv4 address */
|
|
struct e_in6_addr ip6addr; /* IPv6 address */
|
|
guint16 rd_type; /* Route Distinguisher type */
|
|
guint16 nlri_type; /* NLRI Type */
|
|
guint16 tmp16;
|
|
|
|
wmem_strbuf_t *stack_strbuf; /* label stack */
|
|
wmem_strbuf_t *comm_strbuf;
|
|
|
|
|
|
switch (afi) {
|
|
|
|
case AFNUM_INET:
|
|
switch (safi) {
|
|
|
|
case SAFNUM_UNICAST:
|
|
case SAFNUM_MULCAST:
|
|
case SAFNUM_UNIMULC:
|
|
total_length = decode_prefix4(tree, NULL,hf_addr4, tvb, offset, 0, tag);
|
|
if (total_length < 0)
|
|
return -1;
|
|
break;
|
|
|
|
case SAFNUM_MPLS_LABEL:
|
|
plen = tvb_get_guint8(tvb, offset);
|
|
stack_strbuf = wmem_strbuf_new_label(wmem_packet_scope());
|
|
labnum = decode_MPLS_stack(tvb, offset + 1, stack_strbuf);
|
|
|
|
offset += (1 + labnum * 3);
|
|
if (plen <= (labnum * 3*8)) {
|
|
proto_tree_add_text(tree, tvb, start_offset, 1,
|
|
"%s Labeled IPv4 prefix length %u invalid",
|
|
tag, plen);
|
|
return -1;
|
|
}
|
|
plen -= (labnum * 3*8);
|
|
length = ipv4_addr_and_mask(tvb, offset, ip4addr.addr_bytes, plen);
|
|
if (length < 0) {
|
|
proto_tree_add_text(tree, tvb, start_offset, 1,
|
|
"%s Labeled IPv4 prefix length %u invalid",
|
|
tag, plen + (labnum * 3*8));
|
|
return -1;
|
|
}
|
|
|
|
ti = proto_tree_add_text(tree, tvb, start_offset,
|
|
(offset + length) - start_offset,
|
|
"Label Stack=%s IPv4=%s/%u",
|
|
wmem_strbuf_get_str(stack_strbuf),
|
|
ip_to_str(ip4addr.addr_bytes), plen);
|
|
prefix_tree = proto_item_add_subtree(ti, ett_bgp_prefix);
|
|
proto_tree_add_text(prefix_tree, tvb, start_offset, 1, "%s Prefix length: %u",
|
|
tag, plen + labnum * 3 * 8);
|
|
proto_tree_add_text(prefix_tree, tvb, start_offset + 1, 3 * labnum, "%s Label Stack: %s",
|
|
tag, wmem_strbuf_get_str(stack_strbuf));
|
|
if (hf_addr4 != -1) {
|
|
proto_tree_add_ipv4(prefix_tree, hf_addr4, tvb, offset,
|
|
length, ip4addr.addr);
|
|
} else {
|
|
proto_tree_add_text(prefix_tree, tvb, offset, length,
|
|
"%s IPv4 prefix: %s",
|
|
tag, ip_to_str(ip4addr.addr_bytes));
|
|
}
|
|
total_length = (1 + labnum*3) + length;
|
|
break;
|
|
case SAFNUM_MCAST_VPN:
|
|
total_length = decode_mcast_vpn_nlri(tree, tvb, offset, afi);
|
|
if (total_length < 0)
|
|
return -1;
|
|
break;
|
|
case SAFNUM_MDT:
|
|
total_length = decode_mdt_safi(tree, tvb, offset);
|
|
if (total_length < 0)
|
|
return -1;
|
|
break;
|
|
case SAFNUM_ROUTE_TARGET:
|
|
plen = tvb_get_guint8(tvb, offset);
|
|
|
|
if (plen == 0) {
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"%s Wildcard route target", tag);
|
|
total_length = 1;
|
|
break;
|
|
}
|
|
|
|
if ((plen < 32) || (plen > 96)) {
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"%s Route target length %u invalid",
|
|
tag, plen);
|
|
return -1;
|
|
}
|
|
|
|
length = (plen + 7)/8;
|
|
comm_strbuf = wmem_strbuf_new_label(wmem_packet_scope());
|
|
|
|
switch (tvb_get_ntohs(tvb, offset + 1 + 4)) {
|
|
case BGP_EXT_COM_RT_0:
|
|
wmem_strbuf_append_printf(comm_strbuf, "%u:%u",
|
|
tvb_get_ntohs(tvb, offset + 1 + 6),
|
|
tvb_get_ntohl(tvb, offset + 1 + 8));
|
|
break;
|
|
case BGP_EXT_COM_RT_1:
|
|
wmem_strbuf_append_printf(comm_strbuf, "%s:%u",
|
|
tvb_ip_to_str(tvb, offset + 1 + 6),
|
|
tvb_get_ntohs(tvb, offset + 1 + 10));
|
|
break;
|
|
case BGP_EXT_COM_RT_2:
|
|
wmem_strbuf_append_printf(comm_strbuf, "%u:%u",
|
|
tvb_get_ntohl(tvb, 6),
|
|
tvb_get_ntohs(tvb, offset + 1 + 10));
|
|
break;
|
|
default:
|
|
wmem_strbuf_append_printf(comm_strbuf, "Invalid RT type");
|
|
break;
|
|
}
|
|
ti = proto_tree_add_text(tree, tvb, offset + 1, length, "%s %u:%s/%u",
|
|
tag, tvb_get_ntohl(tvb, offset + 1 + 0),
|
|
wmem_strbuf_get_str(comm_strbuf),
|
|
plen);
|
|
prefix_tree = proto_item_add_subtree(ti, ett_bgp_prefix);
|
|
proto_tree_add_text(prefix_tree, tvb, offset, 1, "%s Prefix length: %u",
|
|
tag, plen);
|
|
proto_tree_add_text(prefix_tree, tvb, offset + 1, 4, "%s Originating AS: %u",
|
|
tag, tvb_get_ntohl(tvb, offset + 1 + 0));
|
|
proto_tree_add_text(prefix_tree, tvb, offset + 1 + 4, length - 4, "%s Community prefix: %s",
|
|
tag, wmem_strbuf_get_str(comm_strbuf));
|
|
total_length = 1 + length;
|
|
break;
|
|
case SAFNUM_ENCAPSULATION:
|
|
plen = tvb_get_guint8(tvb, offset);
|
|
if (plen != 32){
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"%s IPv4 address length %u invalid",
|
|
tag, plen);
|
|
return -1;
|
|
}
|
|
offset += 1;
|
|
ip4addr.addr = tvb_get_ipv4(tvb, offset);
|
|
|
|
proto_tree_add_text(tree, tvb, offset,
|
|
offset + 4,
|
|
"Endpoint Address: %s",
|
|
ip_to_str((guint8 *)&ip4addr));
|
|
|
|
total_length = 5; /* length(1 octet) + address(4 octets) */
|
|
break;
|
|
case SAFNUM_TUNNEL:
|
|
plen = tvb_get_guint8(tvb, offset);
|
|
if (plen <= 16){
|
|
proto_tree_add_text(tree, tvb, start_offset, 1,
|
|
"%s Tunnel IPv4 prefix length %u invalid",
|
|
tag, plen);
|
|
return -1;
|
|
}
|
|
tnl_id = tvb_get_ntohs(tvb, offset + 1);
|
|
offset += 3; /* Length + Tunnel Id */
|
|
plen -= 16; /* 2-octet Identifier */
|
|
length = ipv4_addr_and_mask(tvb, offset, ip4addr.addr_bytes, plen);
|
|
if (length < 0) {
|
|
proto_tree_add_text(tree, tvb, start_offset, 1,
|
|
"%s Tunnel IPv4 prefix length %u invalid",
|
|
tag, plen + 16);
|
|
return -1;
|
|
}
|
|
ti = proto_tree_add_text(tree, tvb, start_offset,
|
|
(offset + length) - start_offset,
|
|
"Tunnel Identifier=0x%x IPv4=%s/%u",
|
|
tnl_id, ip_to_str(ip4addr.addr_bytes), plen);
|
|
prefix_tree = proto_item_add_subtree(ti, ett_bgp_prefix);
|
|
|
|
proto_tree_add_text(prefix_tree, tvb, start_offset, 1, "%s Prefix length: %u",
|
|
tag, plen + 16);
|
|
proto_tree_add_item(prefix_tree, hf_bgp_mp_nlri_tnl_id, tvb,
|
|
start_offset + 1, 2, ENC_BIG_ENDIAN);
|
|
if (hf_addr4 != -1) {
|
|
proto_tree_add_ipv4(prefix_tree, hf_addr4, tvb, offset,
|
|
length, ip4addr.addr);
|
|
} else {
|
|
proto_tree_add_text(prefix_tree, tvb, offset, length,
|
|
"%s IPv4 prefix: %s",
|
|
tag, ip_to_str(ip4addr.addr_bytes));
|
|
}
|
|
total_length = 1 + 2 + length; /* length field + Tunnel Id + IPv4 len */
|
|
break;
|
|
|
|
case SAFNUM_LAB_VPNUNICAST:
|
|
case SAFNUM_LAB_VPNMULCAST:
|
|
case SAFNUM_LAB_VPNUNIMULC:
|
|
plen = tvb_get_guint8(tvb, offset);
|
|
stack_strbuf = wmem_strbuf_new_label(wmem_packet_scope());
|
|
labnum = decode_MPLS_stack(tvb, offset + 1, stack_strbuf);
|
|
|
|
offset += (1 + labnum * 3);
|
|
if (plen <= (labnum * 3*8)) {
|
|
proto_tree_add_text(tree, tvb, start_offset, 1,
|
|
"%s Labeled VPN IPv4 prefix length %u invalid",
|
|
tag, plen);
|
|
return -1;
|
|
}
|
|
plen -= (labnum * 3*8);
|
|
|
|
rd_type = tvb_get_ntohs(tvb, offset);
|
|
if (plen < 8*8) {
|
|
proto_tree_add_text(tree, tvb, start_offset, 1,
|
|
"%s Labeled VPN IPv4 prefix length %u invalid",
|
|
tag, plen + (labnum * 3*8));
|
|
return -1;
|
|
}
|
|
plen -= 8*8;
|
|
|
|
switch (rd_type) {
|
|
|
|
case FORMAT_AS2_LOC: /* Code borrowed from the decode_prefix4 function */
|
|
length = ipv4_addr_and_mask(tvb, offset + 8, ip4addr.addr_bytes, plen);
|
|
if (length < 0) {
|
|
proto_tree_add_text(tree, tvb, start_offset, 1,
|
|
"%s Labeled VPN IPv4 prefix length %u invalid",
|
|
tag, plen + (labnum * 3*8) + 8*8);
|
|
return -1;
|
|
}
|
|
|
|
ti = proto_tree_add_text(tree, tvb, start_offset,
|
|
(offset + 8 + length) - start_offset,
|
|
"Label Stack=%s RD=%u:%u, IPv4=%s/%u",
|
|
wmem_strbuf_get_str(stack_strbuf),
|
|
tvb_get_ntohs(tvb, offset + 2),
|
|
tvb_get_ntohl(tvb, offset + 4),
|
|
ip_to_str(ip4addr.addr_bytes), plen);
|
|
prefix_tree = proto_item_add_subtree(ti, ett_bgp_prefix);
|
|
proto_tree_add_text(prefix_tree, tvb, start_offset, 1, "%s Prefix length: %u",
|
|
tag, plen + labnum * 3 * 8 + 8 * 8);
|
|
proto_tree_add_text(prefix_tree, tvb, start_offset + 1, 3 * labnum,
|
|
"%s Label Stack: %s", tag, wmem_strbuf_get_str(stack_strbuf));
|
|
proto_tree_add_text(prefix_tree, tvb, start_offset + 1 + 3 * labnum, 8,
|
|
"%s Route Distinguisher: %u:%u", tag, tvb_get_ntohs(tvb, offset + 2),
|
|
tvb_get_ntohl(tvb, offset + 4));
|
|
if (hf_addr4 != -1) {
|
|
proto_tree_add_ipv4(prefix_tree, hf_addr4, tvb,
|
|
offset + 8, length, ip4addr.addr);
|
|
} else {
|
|
proto_tree_add_text(prefix_tree, tvb, offset + 8,
|
|
length, "%s IPv4 prefix: %s", tag,
|
|
ip_to_str(ip4addr.addr_bytes));
|
|
}
|
|
total_length = (1 + labnum * 3 + 8) + length;
|
|
break;
|
|
|
|
case FORMAT_IP_LOC: /* Code borrowed from the decode_prefix4 function */
|
|
tvb_memcpy(tvb, ip4addr.addr_bytes, offset + 2, 4);
|
|
|
|
length = ipv4_addr_and_mask(tvb, offset + 8, ip4addr2.addr_bytes, plen);
|
|
if (length < 0) {
|
|
proto_tree_add_text(tree, tvb, start_offset, 1,
|
|
"%s Labeled VPN IPv4 prefix length %u invalid",
|
|
tag, plen + (labnum * 3*8) + 8*8);
|
|
return -1;
|
|
}
|
|
|
|
ti = proto_tree_add_text(tree, tvb, start_offset,
|
|
(offset + 8 + length) - start_offset,
|
|
"Label Stack=%s RD=%s:%u, IPv4=%s/%u",
|
|
wmem_strbuf_get_str(stack_strbuf),
|
|
ip_to_str(ip4addr.addr_bytes),
|
|
tvb_get_ntohs(tvb, offset + 6),
|
|
ip_to_str(ip4addr2.addr_bytes),
|
|
plen);
|
|
prefix_tree = proto_item_add_subtree(ti, ett_bgp_prefix);
|
|
proto_tree_add_text(prefix_tree, tvb, start_offset, 1, "%s Prefix length: %u",
|
|
tag, plen + labnum * 3 * 8 + 8 * 8);
|
|
proto_tree_add_text(prefix_tree, tvb, start_offset + 1, 3 * labnum,
|
|
"%s Label Stack: %s", tag, wmem_strbuf_get_str(stack_strbuf));
|
|
proto_tree_add_text(prefix_tree, tvb, start_offset + 1 + 3 * labnum, 8,
|
|
"%s Route Distinguisher: %s:%u", tag, ip_to_str(ip4addr.addr_bytes),
|
|
tvb_get_ntohs(tvb, offset + 6));
|
|
if (hf_addr4 != -1) {
|
|
proto_tree_add_ipv4(prefix_tree, hf_addr4, tvb,
|
|
offset + 8, length, ip4addr2.addr);
|
|
} else {
|
|
proto_tree_add_text(prefix_tree, tvb, offset + 8,
|
|
length, "%s IPv4 prefix: %s", tag,
|
|
ip_to_str(ip4addr2.addr_bytes));
|
|
}
|
|
total_length = (1 + labnum * 3 + 8) + length;
|
|
break;
|
|
|
|
case FORMAT_AS4_LOC: /* Code borrowed from the decode_prefix4 function */
|
|
length = ipv4_addr_and_mask(tvb, offset + 8, ip4addr.addr_bytes, plen);
|
|
if (length < 0) {
|
|
proto_tree_add_text(tree, tvb, start_offset, 1,
|
|
"%s Labeled VPN IPv4 prefix length %u invalid",
|
|
tag, plen + (labnum * 3*8) + 8*8);
|
|
return -1;
|
|
}
|
|
|
|
ti = proto_tree_add_text(tree, tvb, start_offset,
|
|
(offset + 8 + length) - start_offset,
|
|
"Label Stack=%s RD=%u.%u:%u, IPv4=%s/%u",
|
|
wmem_strbuf_get_str(stack_strbuf),
|
|
tvb_get_ntohs(tvb, offset + 2),
|
|
tvb_get_ntohs(tvb, offset + 4),
|
|
tvb_get_ntohs(tvb, offset + 6),
|
|
ip_to_str(ip4addr.addr_bytes), plen);
|
|
prefix_tree = proto_item_add_subtree(ti, ett_bgp_prefix);
|
|
proto_tree_add_text(prefix_tree, tvb, start_offset, 1, "%s Prefix length: %u",
|
|
tag, plen + labnum * 3 * 8 + 8 * 8);
|
|
proto_tree_add_text(prefix_tree, tvb, start_offset + 1, 3 * labnum,
|
|
"%s Label Stack: %s", tag, wmem_strbuf_get_str(stack_strbuf));
|
|
proto_tree_add_text(prefix_tree, tvb, start_offset + 1 + 3 * labnum, 8,
|
|
"%s Route Distinguisher: %u.%u:%u", tag, tvb_get_ntohs(tvb, offset + 2),
|
|
tvb_get_ntohs(tvb, offset + 4), tvb_get_ntohs(tvb, offset + 6));
|
|
if (hf_addr4 != -1) {
|
|
proto_tree_add_ipv4(prefix_tree, hf_addr4, tvb,
|
|
offset + 8, length, ip4addr.addr);
|
|
} else {
|
|
proto_tree_add_text(prefix_tree, tvb, offset + 8,
|
|
length, "%s IPv4 prefix: %s", tag,
|
|
ip_to_str(ip4addr.addr_bytes));
|
|
}
|
|
total_length = (1 + labnum * 3 + 8) + length;
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_text(tree, tvb, start_offset,
|
|
(offset - start_offset) + 2,
|
|
"Unknown labeled VPN IPv4 address format %u", rd_type);
|
|
return -1;
|
|
} /* switch (rd_type) */
|
|
break;
|
|
|
|
case SAFNUM_FSPEC_RULE:
|
|
case SAFNUM_FSPEC_VPN_RULE:
|
|
total_length = decode_flowspec_nlri(tree, tvb, offset, afi, pinfo);
|
|
if(total_length < 0)
|
|
return(-1);
|
|
total_length++;
|
|
break;
|
|
default:
|
|
proto_tree_add_text(tree, tvb, start_offset, 0,
|
|
"Unknown SAFI (%u) for AFI %u", safi, afi);
|
|
return -1;
|
|
} /* switch (safi) */
|
|
break;
|
|
|
|
case AFNUM_INET6:
|
|
switch (safi) {
|
|
|
|
case SAFNUM_UNICAST:
|
|
case SAFNUM_MULCAST:
|
|
case SAFNUM_UNIMULC:
|
|
total_length = decode_prefix6(tree, hf_addr6, tvb, offset, 0, tag);
|
|
if (total_length < 0)
|
|
return -1;
|
|
break;
|
|
|
|
case SAFNUM_MPLS_LABEL:
|
|
plen = tvb_get_guint8(tvb, offset);
|
|
stack_strbuf = wmem_strbuf_new_label(wmem_packet_scope());
|
|
labnum = decode_MPLS_stack(tvb, offset + 1, stack_strbuf);
|
|
|
|
offset += (1 + labnum * 3);
|
|
if (plen <= (labnum * 3*8)) {
|
|
proto_tree_add_text(tree, tvb, start_offset, 1,
|
|
"%s Labeled IPv6 prefix length %u invalid", tag, plen);
|
|
return -1;
|
|
}
|
|
plen -= (labnum * 3*8);
|
|
|
|
length = ipv6_addr_and_mask(tvb, offset, &ip6addr, plen);
|
|
if (length < 0) {
|
|
proto_tree_add_text(tree, tvb, start_offset, 1,
|
|
"%s Labeled IPv6 prefix length %u invalid",
|
|
tag, plen + (labnum * 3*8));
|
|
return -1;
|
|
}
|
|
|
|
proto_tree_add_text(tree, tvb, start_offset,
|
|
(offset + length) - start_offset,
|
|
"Label Stack=%s, IPv6=%s/%u",
|
|
wmem_strbuf_get_str(stack_strbuf),
|
|
ip6_to_str(&ip6addr), plen);
|
|
total_length = (1 + labnum * 3) + length;
|
|
break;
|
|
case SAFNUM_ENCAPSULATION:
|
|
plen = tvb_get_guint8(tvb, offset);
|
|
if (plen != 128){
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"%s IPv6 address length %u invalid",
|
|
tag, plen);
|
|
return -1;
|
|
}
|
|
offset += 1;
|
|
tvb_get_ipv6(tvb, offset, &ip6addr);
|
|
|
|
proto_tree_add_text(tree, tvb, offset,
|
|
offset + 16,
|
|
"Endpoint Address: %s",
|
|
ip6_to_str(&ip6addr));
|
|
|
|
total_length = 17; /* length(1 octet) + address(16 octets) */
|
|
break;
|
|
case SAFNUM_TUNNEL:
|
|
plen = tvb_get_guint8(tvb, offset);
|
|
if (plen <= 16){
|
|
proto_tree_add_text(tree, tvb, start_offset, 1,
|
|
"%s Tunnel IPv6 prefix length %u invalid",
|
|
tag, plen);
|
|
return -1;
|
|
}
|
|
tnl_id = tvb_get_ntohs(tvb, offset + 1);
|
|
offset += 3; /* Length + Tunnel Id */
|
|
plen -= 16; /* 2-octet Identifier */
|
|
length = ipv6_addr_and_mask(tvb, offset, &ip6addr, plen);
|
|
if (length < 0) {
|
|
proto_tree_add_text(tree, tvb, start_offset, 1,
|
|
"%s Tunnel IPv6 prefix length %u invalid",
|
|
tag, plen + 16);
|
|
return -1;
|
|
}
|
|
proto_tree_add_text(tree, tvb, start_offset,
|
|
(offset + length) - start_offset,
|
|
"Tunnel Identifier=0x%x IPv6=%s/%u",
|
|
tnl_id, ip6_to_str(&ip6addr), plen);
|
|
total_length = (1 + 2) + length; /* length field + Tunnel Id + IPv4 len */
|
|
break;
|
|
|
|
case SAFNUM_LAB_VPNUNICAST:
|
|
case SAFNUM_LAB_VPNMULCAST:
|
|
case SAFNUM_LAB_VPNUNIMULC:
|
|
plen = tvb_get_guint8(tvb, offset);
|
|
stack_strbuf = wmem_strbuf_new_label(wmem_packet_scope());
|
|
labnum = decode_MPLS_stack(tvb, offset + 1, stack_strbuf);
|
|
|
|
offset += (1 + labnum * 3);
|
|
if (plen <= (labnum * 3*8)) {
|
|
proto_tree_add_text(tree, tvb, start_offset, 1,
|
|
"%s Labeled VPN IPv6 prefix length %u invalid", tag, plen);
|
|
return -1;
|
|
}
|
|
plen -= (labnum * 3*8);
|
|
|
|
rd_type = tvb_get_ntohs(tvb,offset);
|
|
if (plen < 8*8) {
|
|
proto_tree_add_text(tree, tvb, start_offset, 1,
|
|
"%s Labeled VPN IPv6 prefix length %u invalid",
|
|
tag, plen + (labnum * 3*8));
|
|
return -1;
|
|
}
|
|
plen -= 8*8;
|
|
|
|
switch (rd_type) {
|
|
|
|
case FORMAT_AS2_LOC:
|
|
length = ipv6_addr_and_mask(tvb, offset + 8, &ip6addr, plen);
|
|
if (length < 0) {
|
|
proto_tree_add_text(tree, tvb, start_offset, 1,
|
|
"%s Labeled VPN IPv6 prefix length %u invalid",
|
|
tag, plen + (labnum * 3*8) + 8*8);
|
|
return -1;
|
|
}
|
|
|
|
proto_tree_add_text(tree, tvb, start_offset,
|
|
(offset + 8 + length) - start_offset,
|
|
"Label Stack=%s RD=%u:%u, IPv6=%s/%u",
|
|
wmem_strbuf_get_str(stack_strbuf),
|
|
tvb_get_ntohs(tvb, offset + 2),
|
|
tvb_get_ntohl(tvb, offset + 4),
|
|
ip6_to_str(&ip6addr), plen);
|
|
total_length = (1 + labnum * 3 + 8) + length;
|
|
break;
|
|
|
|
case FORMAT_IP_LOC:
|
|
tvb_memcpy(tvb, ip4addr.addr_bytes, offset + 2, 4);
|
|
|
|
length = ipv6_addr_and_mask(tvb, offset + 8, &ip6addr, plen);
|
|
if (length < 0) {
|
|
proto_tree_add_text(tree, tvb, start_offset, 1,
|
|
"%s Labeled VPN IPv6 prefix length %u invalid",
|
|
tag, plen + (labnum * 3*8) + 8*8);
|
|
return -1;
|
|
}
|
|
|
|
proto_tree_add_text(tree, tvb, start_offset,
|
|
(offset + 8 + length) - start_offset,
|
|
"Label Stack=%s RD=%s:%u, IPv6=%s/%u",
|
|
wmem_strbuf_get_str(stack_strbuf),
|
|
ip_to_str(ip4addr.addr_bytes),
|
|
tvb_get_ntohs(tvb, offset + 6),
|
|
ip6_to_str(&ip6addr), plen);
|
|
total_length = (1 + labnum * 3 + 8) + length;
|
|
break;
|
|
|
|
case FORMAT_AS4_LOC:
|
|
length = ipv6_addr_and_mask(tvb, offset + 8, &ip6addr, plen);
|
|
if (length < 0) {
|
|
proto_tree_add_text(tree, tvb, start_offset, 1,
|
|
"%s Labeled VPN IPv6 prefix length %u invalid",
|
|
tag, plen + (labnum * 3*8) + 8*8);
|
|
return -1;
|
|
}
|
|
|
|
proto_tree_add_text(tree, tvb, start_offset,
|
|
(offset + 8 + length) - start_offset,
|
|
"Label Stack=%s RD=%u.%u:%u, IPv6=%s/%u",
|
|
wmem_strbuf_get_str(stack_strbuf),
|
|
tvb_get_ntohs(tvb, offset + 2),
|
|
tvb_get_ntohs(tvb, offset + 4),
|
|
tvb_get_ntohs(tvb, offset + 6),
|
|
ip6_to_str(&ip6addr), plen);
|
|
total_length = (1 + labnum * 3 + 8) + length;
|
|
break;
|
|
default:
|
|
proto_tree_add_text(tree, tvb, start_offset, 0,
|
|
"Unknown labeled VPN IPv6 address format %u", rd_type);
|
|
return -1;
|
|
} /* switch (rd_type) */
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_text(tree, tvb, start_offset, 0,
|
|
"Unknown SAFI (%u) for AFI %u", safi, afi);
|
|
return -1;
|
|
} /* switch (safi) */
|
|
break;
|
|
|
|
case AFNUM_L2VPN:
|
|
case AFNUM_L2VPN_OLD:
|
|
switch (safi) {
|
|
|
|
case SAFNUM_LAB_VPNUNICAST:
|
|
case SAFNUM_LAB_VPNMULCAST:
|
|
case SAFNUM_LAB_VPNUNIMULC:
|
|
case SAFNUM_VPLS:
|
|
plen = tvb_get_ntohs(tvb,offset);
|
|
rd_type=tvb_get_ntohs(tvb,offset+2);
|
|
|
|
/* RFC6074 Section 7 BGP-AD and VPLS-BGP Interoperability
|
|
Both BGP-AD and VPLS-BGP [RFC4761] use the same AFI/SAFI. In order
|
|
for both BGP-AD and VPLS-BGP to co-exist, the NLRI length must be
|
|
used as a demultiplexer.
|
|
|
|
The BGP-AD NLRI has an NLRI length of 12 bytes, containing only an
|
|
8-byte RD and a 4-byte VSI-ID. VPLS-BGP [RFC4761] uses a 17-byte
|
|
NLRI length. Therefore, implementations of BGP-AD must ignore NLRI
|
|
that are greater than 12 bytes.
|
|
*/
|
|
if(plen == 12) /* BGP-AD */
|
|
{
|
|
switch (rd_type) {
|
|
|
|
case FORMAT_AS2_LOC:
|
|
proto_tree_add_text(tree, tvb, start_offset,
|
|
(offset + plen + 2) - start_offset,
|
|
"RD: %u:%u, PE_addr: %s",
|
|
tvb_get_ntohs(tvb, offset + 4),
|
|
tvb_get_ntohl(tvb, offset + 6),
|
|
tvb_ip_to_str(tvb, offset + 10));
|
|
break;
|
|
|
|
case FORMAT_IP_LOC:
|
|
proto_tree_add_text(tree, tvb, offset,
|
|
(offset + plen + 2) - start_offset,
|
|
"RD: %s:%u, PE_addr: %s",
|
|
tvb_ip_to_str(tvb, offset + 10),
|
|
tvb_get_ntohs(tvb, offset + 8),
|
|
tvb_ip_to_str(tvb, offset + 10));
|
|
break;
|
|
case FORMAT_AS4_LOC:
|
|
proto_tree_add_text(tree, tvb, start_offset,
|
|
(offset + plen + 2) - start_offset,
|
|
"RD: %u.%u:%u, PE_addr: %s",
|
|
tvb_get_ntohs(tvb, offset + 4),
|
|
tvb_get_ntohs(tvb, offset + 6),
|
|
tvb_get_ntohs(tvb, offset + 8),
|
|
tvb_ip_to_str(tvb, offset + 10));
|
|
break;
|
|
default:
|
|
proto_tree_add_text(tree, tvb, start_offset,
|
|
(offset - start_offset) + 2,
|
|
"Unknown labeled VPN address format %u", rd_type);
|
|
return -1;
|
|
} /* switch (rd_type) */
|
|
}else{ /* VPLS-BGP */
|
|
ce_id=tvb_get_ntohs(tvb,offset+10);
|
|
labblk_off=tvb_get_ntohs(tvb,offset+12);
|
|
labblk_size=tvb_get_ntohs(tvb,offset+14);
|
|
stack_strbuf = wmem_strbuf_new_label(wmem_packet_scope());
|
|
decode_MPLS_stack(tvb, offset + 16, stack_strbuf);
|
|
switch (rd_type) {
|
|
|
|
case FORMAT_AS2_LOC:
|
|
tvb_memcpy(tvb, ip4addr.addr_bytes, offset + 6, 4);
|
|
proto_tree_add_text(tree, tvb, start_offset,
|
|
(offset + plen + 1) - start_offset,
|
|
"RD: %u:%s, CE-ID: %u, Label-Block Offset: %u, "
|
|
"Label-Block Size: %u Label Base %s",
|
|
tvb_get_ntohs(tvb, offset + 4),
|
|
ip_to_str(ip4addr.addr_bytes),
|
|
ce_id,
|
|
labblk_off,
|
|
labblk_size,
|
|
wmem_strbuf_get_str(stack_strbuf));
|
|
break;
|
|
|
|
case FORMAT_IP_LOC:
|
|
tvb_memcpy(tvb, ip4addr.addr_bytes, offset + 4, 4);
|
|
proto_tree_add_text(tree, tvb, offset,
|
|
(offset + plen + 1) - start_offset,
|
|
"RD: %s:%u, CE-ID: %u, Label-Block Offset: %u, "
|
|
"Label-Block Size: %u, Label Base %s",
|
|
ip_to_str(ip4addr.addr_bytes),
|
|
tvb_get_ntohs(tvb, offset + 8),
|
|
ce_id,
|
|
labblk_off,
|
|
labblk_size,
|
|
wmem_strbuf_get_str(stack_strbuf));
|
|
break;
|
|
case FORMAT_AS4_LOC:
|
|
proto_tree_add_text(tree, tvb, offset,
|
|
(offset + plen + 1) - start_offset,
|
|
"RD: %u.%u:%u, CE-ID: %u, Label-Block Offset: %u, "
|
|
"Label-Block Size: %u, Label Base %s",
|
|
tvb_get_ntohs(tvb, offset + 4),
|
|
tvb_get_ntohs(tvb, offset + 6),
|
|
tvb_get_ntohs(tvb, offset + 8),
|
|
ce_id,
|
|
labblk_off,
|
|
labblk_size,
|
|
wmem_strbuf_get_str(stack_strbuf));
|
|
break;
|
|
default:
|
|
proto_tree_add_text(tree, tvb, start_offset,
|
|
(offset - start_offset) + 2,
|
|
"Unknown labeled VPN address format %u", rd_type);
|
|
return -1;
|
|
} /* switch (rd_type) */
|
|
}
|
|
/* FIXME there are subTLVs left to decode ... for now lets omit them */
|
|
total_length = plen+2;
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_text(tree, tvb, start_offset, 0,
|
|
"Unknown SAFI (%u) for AFI %u", safi, afi);
|
|
return -1;
|
|
} /* switch (safi) */
|
|
break;
|
|
case AFNUM_LINK_STATE:
|
|
|
|
nlri_type = tvb_get_ntohs(tvb, offset);
|
|
total_length = tvb_get_ntohs(tvb, offset + 2);
|
|
length = total_length;
|
|
total_length += 4;
|
|
|
|
if (safi == SAFNUM_LINK_STATE) {
|
|
ti = proto_tree_add_item(tree, hf_bgp_ls_safi72_nlri, tvb, offset, total_length , ENC_NA);
|
|
} else if (safi == SAFNUM_LAB_VPNUNICAST) {
|
|
ti = proto_tree_add_item(tree, hf_bgp_ls_safi128_nlri, tvb, offset, total_length , ENC_NA);
|
|
} else
|
|
return -1;
|
|
|
|
prefix_tree = proto_item_add_subtree(ti, ett_bgp_mp_reach_nlri);
|
|
proto_tree_add_item(prefix_tree, hf_bgp_ls_nlri_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(prefix_tree, hf_bgp_ls_nlri_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
|
|
/* when SAFI 128, then write route distinguisher */
|
|
if (safi == SAFNUM_LAB_VPNUNICAST) {
|
|
if (length < BGP_ROUTE_DISTINGUISHER_SIZE) {
|
|
if (length == 0) {
|
|
expert_add_info_format(pinfo, prefix_tree, &ei_bgp_ls_error,
|
|
"Unexpected end of SAFI 128 NLRI, Route Distinguisher field is required!");
|
|
}
|
|
if (length > 0) {
|
|
expert_add_info_format(pinfo, prefix_tree, &ei_bgp_ls_error,
|
|
"Unexpected Route Distinguisher length (%u)!",
|
|
length);
|
|
}
|
|
break;
|
|
}
|
|
disting_item = proto_tree_add_item(prefix_tree, hf_bgp_ls_safi128_nlri_route_distinguisher,
|
|
tvb, offset, BGP_ROUTE_DISTINGUISHER_SIZE, ENC_NA);
|
|
disting_tree = proto_item_add_subtree(disting_item, ett_bgp_mp_reach_nlri);
|
|
tmp16 = tvb_get_ntohs(tvb, offset);
|
|
proto_tree_add_item(disting_tree, hf_bgp_ls_safi128_nlri_route_distinguisher_type,
|
|
tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
/* Route Distinguisher Type */
|
|
switch (tmp16) {
|
|
case 0:
|
|
proto_tree_add_item(disting_tree, hf_bgp_ls_safi128_nlri_route_dist_admin_asnum_2,
|
|
tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(disting_tree, hf_bgp_ls_safi128_nlri_route_dist_asnum_4,
|
|
tvb, offset + 4, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case 1:
|
|
proto_tree_add_item(disting_tree, hf_bgp_ls_safi128_nlri_route_dist_admin_ipv4,
|
|
tvb, offset + 2, 4, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(disting_tree, hf_bgp_ls_safi128_nlri_route_dist_asnum_2,
|
|
tvb, offset + 6, 2, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case 2:
|
|
proto_tree_add_item(disting_tree, hf_bgp_ls_safi128_nlri_route_dist_admin_asnum_4,
|
|
tvb, offset + 2, 4, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(disting_tree, hf_bgp_ls_safi128_nlri_route_dist_asnum_2,
|
|
tvb, offset + 6, 2, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
default:
|
|
expert_add_info_format(pinfo, disting_tree, &ei_bgp_ls_error,
|
|
"Unknown Route Distinguisher type (%u)", tmp16);
|
|
}
|
|
offset += BGP_ROUTE_DISTINGUISHER_SIZE;
|
|
length -= BGP_ROUTE_DISTINGUISHER_SIZE;
|
|
}
|
|
|
|
switch (nlri_type) {
|
|
case LINK_STATE_LINK_NLRI:
|
|
|
|
nlri_ti = proto_tree_add_item(prefix_tree,
|
|
hf_bgp_ls_nlri_link_nlri_type, tvb, offset, length,
|
|
ENC_NA);
|
|
nlri_tree = proto_item_add_subtree(nlri_ti, ett_bgp_mp_reach_nlri);
|
|
tmp_length = decode_bgp_link_node_nlri_common_fields(tvb, nlri_tree,
|
|
offset, pinfo, length);
|
|
if (tmp_length < 1)
|
|
return -1;
|
|
|
|
offset += tmp_length;
|
|
length -= tmp_length;
|
|
|
|
/* dissect Remote Node descriptors TLV */
|
|
if (length > 0 && length < 4) {
|
|
expert_add_info_format(pinfo, nlri_tree, &ei_bgp_ls_error,
|
|
"Unknown data in Link-State Link NLRI!");
|
|
break;
|
|
}
|
|
if (length < 1)
|
|
break;
|
|
|
|
tmp_length = decode_bgp_link_node_nlri_tlvs(tvb, nlri_tree, offset,
|
|
pinfo, BGP_NLRI_TLV_REMOTE_NODE_DESCRIPTORS);
|
|
if (tmp_length < 1)
|
|
return -1;
|
|
|
|
offset += tmp_length;
|
|
length -= tmp_length;
|
|
|
|
/* dissect Link Descriptor NLRI */
|
|
if (length > 0 && length < 4) {
|
|
expert_add_info_format(pinfo, nlri_tree, &ei_bgp_ls_error,
|
|
"Unknown data in Link-State Link NLRI, length = %d bytes.", length);
|
|
break;
|
|
}
|
|
if (length < 1)
|
|
break;
|
|
|
|
tmp_length = decode_bgp_link_nlri_link_descriptors(tvb, nlri_tree,
|
|
offset, pinfo, length);
|
|
if (tmp_length < 1)
|
|
return -1;
|
|
|
|
break;
|
|
|
|
case LINK_STATE_NODE_NLRI:
|
|
nlri_ti = proto_tree_add_item(prefix_tree,
|
|
hf_bgp_ls_nlri_node_nlri_type, tvb, offset, length,
|
|
ENC_NA);
|
|
nlri_tree = proto_item_add_subtree(nlri_ti, ett_bgp_mp_reach_nlri);
|
|
tmp_length = decode_bgp_link_node_nlri_common_fields(tvb, nlri_tree,
|
|
offset, pinfo, length);
|
|
if (tmp_length < 1)
|
|
return -1;
|
|
|
|
break;
|
|
|
|
case LINK_STATE_IPV4_TOPOLOGY_PREFIX_NLRI:
|
|
nlri_ti = proto_tree_add_item(prefix_tree,
|
|
hf_bgp_ls_ipv4_topology_prefix_nlri_type, tvb, offset, length,
|
|
ENC_NA);
|
|
nlri_tree = proto_item_add_subtree(nlri_ti, ett_bgp_mp_reach_nlri);
|
|
tmp_length = decode_bgp_link_node_nlri_common_fields(tvb, nlri_tree,
|
|
offset, pinfo, length);
|
|
if (tmp_length < 1)
|
|
return -1;
|
|
|
|
offset += tmp_length;
|
|
length -= tmp_length;
|
|
|
|
/* dissect Prefix Descriptors NLRI */
|
|
if (length > 0 && length < 4) {
|
|
expert_add_info_format(pinfo, nlri_tree, &ei_bgp_ls_error,
|
|
"Unknown data in Link-State Link NLRI, length = %d bytes.", length);
|
|
break;
|
|
}
|
|
if (length < 1)
|
|
break;
|
|
|
|
tmp_length = decode_bgp_link_nlri_prefix_descriptors(tvb, nlri_tree,
|
|
offset, pinfo, length);
|
|
if (tmp_length < 1)
|
|
return -1;
|
|
|
|
break;
|
|
|
|
case LINK_STATE_IPV6_TOPOLOGY_PREFIX_NLRI:
|
|
nlri_ti = proto_tree_add_item(prefix_tree,
|
|
hf_bgp_ls_ipv6_topology_prefix_nlri_type, tvb, offset, length,
|
|
ENC_NA);
|
|
nlri_tree = proto_item_add_subtree(nlri_ti, ett_bgp_mp_reach_nlri);
|
|
tmp_length = decode_bgp_link_node_nlri_common_fields(tvb, nlri_tree,
|
|
offset, pinfo, length);
|
|
if (tmp_length < 1)
|
|
return -1;
|
|
|
|
offset += tmp_length;
|
|
length -= tmp_length;
|
|
|
|
/* dissect Prefix Descriptors NLRI */
|
|
if (length > 0 && length < 4) {
|
|
expert_add_info_format(pinfo, nlri_tree, &ei_bgp_ls_error,
|
|
"Unknown data in Link-State Link NLRI!");
|
|
break;
|
|
}
|
|
if (length < 1)
|
|
break;
|
|
|
|
tmp_length = decode_bgp_link_nlri_prefix_descriptors(tvb, nlri_tree,
|
|
offset, pinfo, length);
|
|
if (tmp_length < 1)
|
|
return -1;
|
|
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_text(tree, tvb, start_offset, 0,
|
|
"Unknown Link-State NLRI type (%u)", afi);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_text(tree, tvb, start_offset, 0,
|
|
"Unknown AFI (%u) value", afi);
|
|
return -1;
|
|
} /* switch (afi) */
|
|
return(total_length);
|
|
}
|
|
|
|
/*
|
|
* Dissect a BGP capability.
|
|
*/
|
|
static int
|
|
dissect_bgp_capability_item(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, int offset, gboolean action)
|
|
{
|
|
proto_tree *cap_tree;
|
|
proto_item *ti;
|
|
proto_item *ti_len;
|
|
guint8 ctype;
|
|
guint8 clen;
|
|
|
|
ti = proto_tree_add_item(tree, hf_bgp_cap, tvb, offset, -1, ENC_NA);
|
|
cap_tree = proto_item_add_subtree(ti, ett_bgp_cap);
|
|
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
ctype = tvb_get_guint8(tvb, offset);
|
|
proto_item_append_text(ti, ": %s", val_to_str(ctype, capability_vals, "Unknown capability %d"));
|
|
offset += 1;
|
|
|
|
ti_len = proto_tree_add_item(cap_tree, hf_bgp_cap_length, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
clen = tvb_get_guint8(tvb, offset);
|
|
proto_item_set_len(ti, clen+2);
|
|
offset += 1;
|
|
|
|
if(action){
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_action, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_item_set_len(ti, clen+3);
|
|
offset += 1;
|
|
}
|
|
|
|
/* check the capability type */
|
|
switch (ctype) {
|
|
case BGP_CAPABILITY_RESERVED:
|
|
if (clen != 0) {
|
|
expert_add_info_format(pinfo, ti_len, &ei_bgp_cap_len_bad, "Capability length %u wrong, must be = 0", clen);
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_unknown, tvb, offset, clen, ENC_NA);
|
|
}
|
|
offset += clen;
|
|
break;
|
|
case BGP_CAPABILITY_MULTIPROTOCOL:
|
|
if (clen != 4) {
|
|
expert_add_info_format(pinfo, ti_len, &ei_bgp_cap_len_bad, "Capability length %u is wrong, must be = 4", clen);
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_unknown, tvb, offset, clen, ENC_NA);
|
|
offset += clen;
|
|
}
|
|
else {
|
|
/* AFI */
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_mp_afi, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
/* Reserved */
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_reserved, tvb, offset, 1, ENC_NA);
|
|
offset += 1;
|
|
|
|
/* SAFI */
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_mp_safi, tvb, offset, 1, ENC_NA);
|
|
offset += 1;
|
|
|
|
}
|
|
break;
|
|
case BGP_CAPABILITY_GRACEFUL_RESTART:
|
|
if ((clen < 6) && (clen != 2)) {
|
|
expert_add_info_format(pinfo, ti_len, &ei_bgp_cap_len_bad, "Capability length %u too short, must be greater than 6", clen);
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_unknown, tvb, offset, clen, ENC_NA);
|
|
offset += clen;
|
|
}
|
|
else {
|
|
int eclen = offset + clen;
|
|
proto_tree *sub_tree;
|
|
|
|
if (clen == 2){
|
|
expert_add_info(pinfo, ti_len, &ei_bgp_cap_gr_helper_mode_only);
|
|
}
|
|
|
|
/* Timers */
|
|
ti = proto_tree_add_item(cap_tree, hf_bgp_cap_gr_timers, tvb, offset, 2, ENC_NA);
|
|
sub_tree = proto_item_add_subtree(ti, ett_bgp_cap);
|
|
proto_tree_add_item(sub_tree, hf_bgp_cap_gr_timers_restart_flag, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(sub_tree, hf_bgp_cap_gr_timers_restart_time, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
/*
|
|
* what follows is alist of AFI/SAFI/flag triplets
|
|
* read it until the TLV ends
|
|
*/
|
|
while (offset < eclen) {
|
|
/* AFI */
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_gr_afi, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
/* SAFI */
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_gr_safi, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
|
|
/* Flags */
|
|
ti = proto_tree_add_item(cap_tree, hf_bgp_cap_gr_flag, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
sub_tree = proto_item_add_subtree(ti, ett_bgp_cap);
|
|
proto_tree_add_item(sub_tree, hf_bgp_cap_gr_flag_pfs, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
}
|
|
}
|
|
break;
|
|
case BGP_CAPABILITY_4_OCTET_AS_NUMBER:
|
|
if (clen != 4) {
|
|
expert_add_info_format(pinfo, ti_len, &ei_bgp_cap_len_bad, "Capability length %u is wrong, must be = 4", clen);
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_unknown, tvb, offset, clen, ENC_NA);
|
|
offset += clen;
|
|
}
|
|
else {
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_4as, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
}
|
|
break;
|
|
case BGP_CAPABILITY_DYNAMIC_CAPABILITY:
|
|
if (clen > 0) {
|
|
int eclen = offset + clen;
|
|
|
|
while (offset < eclen) {
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_dc, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
}
|
|
}
|
|
break;
|
|
case BGP_CAPABILITY_ADDITIONAL_PATHS:
|
|
if (clen != 4) {
|
|
expert_add_info_format(pinfo, ti_len, &ei_bgp_cap_len_bad, "Capability length %u is wrong, must be = 4", clen);
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_unknown, tvb, offset, clen, ENC_NA);
|
|
offset += clen;
|
|
}
|
|
else { /* AFI SAFI Send-receive*/
|
|
/* AFI */
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_ap_afi, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
/* SAFI */
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_ap_safi, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
|
|
/* Send-Receive */
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_ap_sendreceive, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
|
|
}
|
|
break;
|
|
|
|
case BGP_CAPABILITY_ENHANCED_ROUTE_REFRESH:
|
|
case BGP_CAPABILITY_ROUTE_REFRESH_CISCO:
|
|
case BGP_CAPABILITY_ROUTE_REFRESH:
|
|
if (clen != 0) {
|
|
expert_add_info_format(pinfo, ti_len, &ei_bgp_cap_len_bad, "Capability length %u wrong, must be = 0", clen);
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_unknown, tvb, offset, clen, ENC_NA);
|
|
}
|
|
offset += clen;
|
|
break;
|
|
case BGP_CAPABILITY_ORF_CISCO:
|
|
case BGP_CAPABILITY_COOPERATIVE_ROUTE_FILTERING:
|
|
if (clen < 6) {
|
|
expert_add_info_format(pinfo, ti_len, &ei_bgp_cap_len_bad, "Capability length %u too short, must be greater than 6", clen);
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_unknown, tvb, offset, clen, ENC_NA);
|
|
offset += clen;
|
|
}
|
|
else {
|
|
guint8 orfnum; /* number of ORFs */
|
|
int i;
|
|
/* AFI */
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_orf_afi, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
/* Reserved */
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_reserved, tvb, offset, 1, ENC_NA);
|
|
offset += 1;
|
|
|
|
/* SAFI */
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_orf_safi, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
|
|
/* Number of ORFs */
|
|
orfnum = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_orf_number, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
for (i=0; i<orfnum; i++) {
|
|
/* ORF Type */
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_orf_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
|
|
/* Send/Receive */
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_orf_sendreceive, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
}
|
|
}
|
|
|
|
break;
|
|
/* unknown capability */
|
|
default:
|
|
if (clen != 0) {
|
|
proto_tree_add_item(cap_tree, hf_bgp_cap_unknown, tvb, offset, clen, ENC_NA);
|
|
}
|
|
offset += clen;
|
|
break;
|
|
} /* switch (ctype) */
|
|
return offset;
|
|
}
|
|
|
|
/*
|
|
* Dissect a BGP OPEN message.
|
|
*/
|
|
static const value_string community_vals[] = {
|
|
{ BGP_COMM_NO_EXPORT, "NO_EXPORT" },
|
|
{ BGP_COMM_NO_ADVERTISE, "NO_ADVERTISE" },
|
|
{ BGP_COMM_NO_EXPORT_SUBCONFED, "NO_EXPORT_SUBCONFED" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_bgp_open(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo)
|
|
{
|
|
guint8 optlen; /* Option Length */
|
|
int ptype; /* parameter type */
|
|
int plen; /* parameter length */
|
|
int cend; /* capabilities end */
|
|
int oend; /* options end */
|
|
int offset; /* tvb offset counter */
|
|
proto_item *ti; /* tree item */
|
|
proto_tree *opt_tree; /* subtree for options */
|
|
proto_tree *par_tree; /* subtree for par options */
|
|
|
|
offset = BGP_MARKER_SIZE + 2 + 1;
|
|
|
|
proto_tree_add_item(tree, hf_bgp_open_version, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
|
|
proto_tree_add_item(tree, hf_bgp_open_myas, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
proto_tree_add_item(tree, hf_bgp_open_holdtime, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
proto_tree_add_item(tree, hf_bgp_open_identifier, tvb, offset, 4, ENC_NA);
|
|
offset += 4;
|
|
|
|
proto_tree_add_item(tree, hf_bgp_open_opt_len, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
optlen = tvb_get_guint8(tvb, offset);
|
|
offset += 1;
|
|
|
|
/* optional parameters */
|
|
if (optlen > 0) {
|
|
oend = offset + optlen;
|
|
|
|
/* add a subtree */
|
|
ti = proto_tree_add_item(tree, hf_bgp_open_opt_params, tvb, offset, optlen, ENC_NA);
|
|
opt_tree = proto_item_add_subtree(ti, ett_bgp_options);
|
|
|
|
/* step through all of the optional parameters */
|
|
while (offset < oend) {
|
|
|
|
/* add a subtree */
|
|
ti = proto_tree_add_item(opt_tree, hf_bgp_open_opt_param, tvb, offset, -1, ENC_NA);
|
|
par_tree = proto_item_add_subtree(ti, ett_bgp_options);
|
|
|
|
/* display and grab the type ... */
|
|
proto_tree_add_item(par_tree, hf_bgp_open_opt_param_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
ptype = tvb_get_guint8(tvb, offset);
|
|
proto_item_append_text(ti, ": %s", val_to_str(ptype, bgp_open_opt_vals, "Unknown Parameter %d"));
|
|
offset += 1;
|
|
|
|
/* ... and length */
|
|
proto_tree_add_item(par_tree, hf_bgp_open_opt_param_len, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
plen = tvb_get_guint8(tvb, offset);
|
|
proto_item_set_len(ti, plen+2);
|
|
offset += 1;
|
|
|
|
/* check the type */
|
|
switch (ptype) {
|
|
case BGP_OPTION_AUTHENTICATION:
|
|
proto_tree_add_item(par_tree, hf_bgp_open_opt_param_auth, tvb, offset, plen, ENC_NA);
|
|
offset += plen;
|
|
break;
|
|
case BGP_OPTION_CAPABILITY:
|
|
/* grab the capability code */
|
|
cend = offset + plen;
|
|
|
|
/* step through all of the capabilities */
|
|
while (offset < cend) {
|
|
offset = dissect_bgp_capability_item(tvb, par_tree, pinfo, offset, FALSE);
|
|
}
|
|
break;
|
|
default:
|
|
proto_tree_add_item(opt_tree, hf_bgp_open_opt_param_unknown, tvb, offset, plen, ENC_NA);
|
|
break;
|
|
} /* switch (ptype) */
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Heursitic for auto-detecton os ASN length 2 or 4 bytes
|
|
*/
|
|
|
|
static guint8
|
|
heuristic_as2_or_4_from_as_path(tvbuff_t *tvb, gint as_path_offset, gint end_attr_offset, guint8 bgpa_type, gint *number_as_segment)
|
|
{
|
|
gint counter_as_segment=0;
|
|
gint offset_check=0;
|
|
guint8 assumed_as_len=0;
|
|
gint asn_is_null=0;
|
|
gint j=0;
|
|
gint k=0;
|
|
gint k_save=0;
|
|
guint8 next_type=0;
|
|
guint8 length=0;
|
|
/* Heuristic is done in two phases
|
|
* First we try to identify the as length (2 or 4 bytes)
|
|
* then we do check that our assumption is ok
|
|
* recalculing the offset and checking we end up with the right result
|
|
* k is used to navigate into the AS_PATH */
|
|
k = as_path_offset;
|
|
/* case of AS_PATH type being explicitly 4 bytes ASN */
|
|
if (bgpa_type == BGPTYPE_AS4_PATH) {
|
|
/* We calculate numbers of segments and return the as length */
|
|
while (k < end_attr_offset)
|
|
{
|
|
length = tvb_get_guint8(tvb, k);
|
|
/* we move to the next segment */
|
|
k = k + (length*assumed_as_len);
|
|
/* if I am not facing the last segment k need to point to next length */
|
|
if(k < end_attr_offset)
|
|
k++;
|
|
counter_as_segment++;
|
|
}
|
|
*number_as_segment = counter_as_segment;
|
|
bgp_asn_len = 4;
|
|
return(4);
|
|
}
|
|
/* case of user specified ASN length */
|
|
if (bgp_asn_len != 0) {
|
|
/* We calculate numbers of segments and return the as length */
|
|
while (k < end_attr_offset)
|
|
{
|
|
length = tvb_get_guint8(tvb, k);
|
|
/* we move to the next segment */
|
|
k = k + (length*assumed_as_len);
|
|
/* if I am not facing the last segment k need to point to next length */
|
|
if(k < end_attr_offset)
|
|
k++;
|
|
counter_as_segment++;
|
|
}
|
|
*number_as_segment = counter_as_segment;
|
|
return(bgp_asn_len);
|
|
}
|
|
/* case of a empty path attribut */
|
|
if (as_path_offset == end_attr_offset)
|
|
{
|
|
*number_as_segment = 0;
|
|
return(bgp_asn_len);
|
|
}
|
|
/* case of we run the heuristic to find the as length */
|
|
k_save = k;
|
|
/* we do run the heuristic on first segment and look at next segment if it exists */
|
|
k++;
|
|
length = tvb_get_guint8(tvb, k++);
|
|
/* let's do some cheking with an as length 2 bytes */
|
|
offset_check = k + 2*length;
|
|
next_type = tvb_get_guint8(tvb, offset_check);
|
|
/* we do have one segment made of 2 bytes ASN we do reach the end of the attribute taking
|
|
* 2 bytes ASN for our calculation */
|
|
if (offset_check == end_attr_offset)
|
|
assumed_as_len = 2;
|
|
/* else we do check if we see a valid AS segment type after (length * AS 2 bytes) */
|
|
else if (next_type == AS_SET ||
|
|
next_type == AS_SEQUENCE ||
|
|
next_type == AS_CONFED_SEQUENCE ||
|
|
next_type == AS_CONFED_SEQUENCE) {
|
|
/* that's a good sign to assume ASN 2 bytes let's check that 2 first bytes of each ASN doesn't eq 0 to confirm */
|
|
for (j=0; j < length && !asn_is_null; j++) {
|
|
if(tvb_get_ntohs(tvb, k+(2*j)) == 0) {
|
|
asn_is_null = 1;
|
|
}
|
|
}
|
|
if (asn_is_null == 0)
|
|
assumed_as_len = 2;
|
|
else
|
|
assumed_as_len = 4;
|
|
|
|
}
|
|
else
|
|
/* we didn't find a valid AS segment type in the next coming segment assuming 2 bytes ASN */
|
|
assumed_as_len = 4;
|
|
/* now that we have our assumed as length let's check we can calculate the attribute length properly */
|
|
k = k_save;
|
|
k++;
|
|
while (k < end_attr_offset)
|
|
{
|
|
length = tvb_get_guint8(tvb, k);
|
|
/* we move to the next segment */
|
|
k = k + (length*assumed_as_len);
|
|
/* if I am not facing the last segment k need to point to next length */
|
|
if(k < end_attr_offset)
|
|
k++;
|
|
counter_as_segment++;
|
|
}
|
|
if (k == end_attr_offset) {
|
|
/* success */
|
|
*number_as_segment = counter_as_segment;
|
|
return(assumed_as_len);
|
|
} else
|
|
/* we are in trouble */
|
|
return(-1);
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Dissect a BGP UPDATE message.
|
|
*/
|
|
static void
|
|
dissect_bgp_update(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo)
|
|
{
|
|
guint8 bgpa_flags; /* path attributes */
|
|
guint8 bgpa_type;
|
|
guint16 hlen; /* message length */
|
|
gint o; /* packet offset */
|
|
gint q=0; /* tmp */
|
|
gint end=0; /* message end */
|
|
guint16 ext_com; /* EXTENDED COMMUNITY extended length type */
|
|
guint8 ext_com8; /* EXTENDED COMMUNITY regular type */
|
|
gboolean is_regular_type; /* flag for regular types */
|
|
gboolean is_extended_type; /* flag for extended types */
|
|
guint16 len; /* tmp */
|
|
int advance; /* tmp */
|
|
proto_item *ti; /* tree item */
|
|
proto_item *ti_communities; /* tree communities */
|
|
proto_item *ti_community; /* tree for each community */
|
|
proto_item *sub_ti; /* tree fir sub item */
|
|
proto_tree *subtree; /* subtree for attributes */
|
|
proto_tree *subtree2; /* subtree for attributes */
|
|
proto_tree *subtree3; /* subtree for attributes */
|
|
proto_tree *subtree4; /* subtree for attributes */
|
|
proto_tree *subtree5; /* subtree for attributes */
|
|
proto_tree *subtree6; /* subtree for attributes */
|
|
proto_tree *as_path_segment_tree; /* subtree for AS_PATH segments */
|
|
gint number_as_segment=0; /* Number As segment */
|
|
proto_tree *communities_tree; /* subtree for COMMUNITIES */
|
|
proto_tree *community_tree; /* subtree for a community */
|
|
proto_tree *cluster_list_tree; /* subtree for CLUSTER_LIST */
|
|
int i, j, k; /* tmp */
|
|
guint8 type=0; /* AS_PATH segment type */
|
|
guint8 length=0; /* AS_PATH segment length */
|
|
wmem_strbuf_t *cluster_list_emstr = NULL; /* CLUSTER_LIST */
|
|
wmem_strbuf_t *junk_emstr; /* tmp */
|
|
guint32 ipaddr; /* IPv4 address */
|
|
guint32 aggregator_as;
|
|
guint16 ssa_type; /* SSA T + Type */
|
|
guint16 ssa_len; /* SSA TLV Length */
|
|
guint8 ssa_v3_len; /* SSA L2TPv3 Cookie Length */
|
|
gfloat linkband; /* Link bandwidth */
|
|
guint16 as_num; /* Autonomous System Number */
|
|
guint16 encaps_tunnel_type; /* Encapsulation Tunnel Type */
|
|
guint16 encaps_tunnel_len; /* Encapsulation TLV Length */
|
|
guint8 encaps_tunnel_subtype; /* Encapsulation Tunnel Sub-TLV Type */
|
|
guint8 encaps_tunnel_sublen; /* Encapsulation TLV Sub-TLV Length */
|
|
|
|
if (!tree)
|
|
return;
|
|
|
|
hlen = tvb_get_ntohs(tvb, BGP_MARKER_SIZE);
|
|
o = BGP_HEADER_SIZE;
|
|
junk_emstr = wmem_strbuf_new_label(wmem_packet_scope());
|
|
|
|
/* check for withdrawals */
|
|
len = tvb_get_ntohs(tvb, o);
|
|
proto_tree_add_item(tree, hf_bgp_update_withdrawn_routes_length, tvb, o, 2, ENC_BIG_ENDIAN);
|
|
o += 2;
|
|
|
|
/* parse unfeasible prefixes */
|
|
if (len > 0) {
|
|
ti = proto_tree_add_item(tree, hf_bgp_update_withdrawn_routes, tvb, o, len, ENC_NA);
|
|
subtree = proto_item_add_subtree(ti, ett_bgp_unfeas);
|
|
/* parse each prefix */
|
|
end = o + len;
|
|
|
|
/* Heuristic to detect if IPv4 prefix are using Path Identifiers */
|
|
if( detect_add_path_prefix4(tvb, o, end) ) {
|
|
/* IPv4 prefixes with Path Id */
|
|
while (o < end) {
|
|
i = decode_path_prefix4(subtree, hf_bgp_nlri_path_id, hf_bgp_withdrawn_prefix, tvb, o,
|
|
"Withdrawn route");
|
|
if (i < 0)
|
|
return;
|
|
o += i;
|
|
}
|
|
} else {
|
|
while (o < end) {
|
|
i = decode_prefix4(subtree, NULL, hf_bgp_withdrawn_prefix, tvb, o, len,
|
|
"Withdrawn route");
|
|
if (i < 0)
|
|
return;
|
|
o += i;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* check for advertisements */
|
|
len = tvb_get_ntohs(tvb, o);
|
|
proto_tree_add_item(tree, hf_bgp_update_total_path_attribute_length, tvb, o, 2, ENC_BIG_ENDIAN);
|
|
|
|
/* path attributes */
|
|
if (len > 0) {
|
|
ti = proto_tree_add_item(tree, hf_bgp_update_path_attributes, tvb, o+2, len, ENC_NA);
|
|
subtree = proto_item_add_subtree(ti, ett_bgp_attrs);
|
|
i = 2;
|
|
while (i < len) {
|
|
proto_item *hidden_item;
|
|
proto_item *ti_pa, *ti_flags;
|
|
proto_tree *flags_tree;
|
|
int off;
|
|
guint16 alen, tlen, aoff, aoff_save;
|
|
guint16 af;
|
|
guint8 saf, snpa;
|
|
guint8 nexthop_len;
|
|
guint8 asn_len = 0;
|
|
|
|
bgpa_flags = tvb_get_guint8(tvb, o + i);
|
|
bgpa_type = tvb_get_guint8(tvb, o + i+1);
|
|
|
|
/* check for the Extended Length bit */
|
|
if (bgpa_flags & BGP_ATTR_FLAG_EXTENDED_LENGTH) {
|
|
alen = tvb_get_ntohs(tvb, o + i + BGP_SIZE_OF_PATH_ATTRIBUTE);
|
|
aoff = BGP_SIZE_OF_PATH_ATTRIBUTE+2;
|
|
} else {
|
|
alen = tvb_get_guint8(tvb, o + i + BGP_SIZE_OF_PATH_ATTRIBUTE);
|
|
aoff = BGP_SIZE_OF_PATH_ATTRIBUTE+1;
|
|
}
|
|
tlen = alen;
|
|
|
|
ti_pa = proto_tree_add_item(subtree, hf_bgp_update_path_attribute, tvb, o + i, tlen + aoff, ENC_NA);
|
|
proto_item_append_text(ti_pa, " - %s", val_to_str_const(bgpa_type, bgpattr_type, "Unknown %d"));
|
|
|
|
subtree2 = proto_item_add_subtree(ti_pa, ett_bgp_attr);
|
|
|
|
ti_flags = proto_tree_add_item(subtree2, hf_bgp_update_path_attribute_flags, tvb, o + i, 1, ENC_NA);
|
|
flags_tree = proto_item_add_subtree(ti_flags, ett_bgp_attr_flags);
|
|
|
|
/* add flag bitfield subtrees */
|
|
proto_tree_add_item(flags_tree, hf_bgp_update_path_attribute_flags_optional, tvb, o + i, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(flags_tree, hf_bgp_update_path_attribute_flags_transitive, tvb, o + i, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(flags_tree, hf_bgp_update_path_attribute_flags_partial, tvb, o + i, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(flags_tree, hf_bgp_update_path_attribute_flags_extended_length, tvb, o + i, 1, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(ti_flags,"%s%s%s%s",
|
|
((bgpa_flags & BGP_ATTR_FLAG_OPTIONAL) == 0) ? ": Well-known" : ": Optional",
|
|
((bgpa_flags & BGP_ATTR_FLAG_TRANSITIVE) == 0) ? ", Non-transitive" : ", Transitive",
|
|
((bgpa_flags & BGP_ATTR_FLAG_PARTIAL) == 0) ? ", Complete" : ", Partial",
|
|
((bgpa_flags & BGP_ATTR_FLAG_EXTENDED_LENGTH) == 0) ? "" : ", Extended Length");
|
|
|
|
proto_tree_add_item(subtree2, hf_bgp_update_path_attribute_type_code, tvb, o + i + 1, 1, ENC_BIG_ENDIAN);
|
|
|
|
proto_tree_add_item(subtree2, hf_bgp_update_path_attribute_length, tvb, o + i + BGP_SIZE_OF_PATH_ATTRIBUTE, aoff - BGP_SIZE_OF_PATH_ATTRIBUTE, ENC_BIG_ENDIAN);
|
|
|
|
/* Path Attribute Type */
|
|
switch (bgpa_type) {
|
|
case BGPTYPE_ORIGIN:
|
|
if (tlen != 1) {
|
|
proto_tree_add_text(subtree2, tvb, o + i + aoff, tlen,
|
|
"Origin (invalid): %u byte%s", tlen,
|
|
plurality(tlen, "", "s"));
|
|
} else {
|
|
proto_tree_add_item(subtree2, hf_bgp_update_path_attribute_origin, tvb,
|
|
o + i + aoff, 1, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(ti_pa, ": %s", val_to_str_const(tvb_get_guint8(tvb, o + i + aoff), bgpattr_origin, "Unknown"));
|
|
}
|
|
break;
|
|
case BGPTYPE_AS_PATH:
|
|
case BGPTYPE_AS4_PATH:
|
|
/* Apply heuristic to guess if we are facing 2 or 4 bytes ASN
|
|
(o + i + aoff) =
|
|
(o + current attribute + aoff bytes to first tuple)
|
|
heuristic also tell us how many AS segments we have */
|
|
asn_len = heuristic_as2_or_4_from_as_path(tvb, o+i+aoff, o+i+aoff+tlen,
|
|
bgpa_type, &number_as_segment);
|
|
proto_item_append_text(ti_pa,": ");
|
|
if(tlen == 0) {
|
|
proto_item_append_text(ti_pa,"empty");
|
|
}
|
|
|
|
q = o + i + aoff;
|
|
for (k=0; k < number_as_segment; k++)
|
|
{
|
|
type = tvb_get_guint8(tvb, q);
|
|
length = tvb_get_guint8(tvb, q+1);
|
|
ti = proto_tree_add_item(subtree2, hf_bgp_update_path_attribute_as_path_segment, tvb,
|
|
q, length * asn_len + 2, ENC_NA);
|
|
proto_item_append_text(ti,": ");
|
|
as_path_segment_tree = proto_item_add_subtree(ti, ett_bgp_as_path_segment);
|
|
proto_tree_add_item(as_path_segment_tree, hf_bgp_update_path_attribute_as_path_segment_type, tvb,
|
|
q, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(as_path_segment_tree, hf_bgp_update_path_attribute_as_path_segment_length, tvb,
|
|
q+1, 1, ENC_BIG_ENDIAN);
|
|
switch(type)
|
|
{
|
|
case AS_SET:
|
|
proto_item_append_text(ti_pa, "{");
|
|
proto_item_append_text(ti, "{");
|
|
break;
|
|
case AS_CONFED_SET:
|
|
proto_item_append_text(ti_pa, "[");
|
|
proto_item_append_text(ti, "[");
|
|
break;
|
|
case AS_CONFED_SEQUENCE:
|
|
proto_item_append_text(ti_pa, "(");
|
|
proto_item_append_text(ti, "(");
|
|
break;
|
|
}
|
|
|
|
q = q + 2;
|
|
for (j = 0; j < length; j++)
|
|
{
|
|
if(asn_len == 2) {
|
|
proto_tree_add_item(as_path_segment_tree,
|
|
hf_bgp_update_path_attribute_as_path_segment_as2,
|
|
tvb, q, 2, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(ti_pa, "%u",
|
|
tvb_get_ntohs(tvb, q));
|
|
proto_item_append_text(ti, "%u",
|
|
tvb_get_ntohs(tvb, q));
|
|
}
|
|
else if (asn_len == 4) {
|
|
proto_tree_add_item(as_path_segment_tree,
|
|
hf_bgp_update_path_attribute_as_path_segment_as4,
|
|
tvb, q, 4, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(ti_pa, "%u",
|
|
tvb_get_ntohl(tvb, q));
|
|
proto_item_append_text(ti, "%u",
|
|
tvb_get_ntohl(tvb, q));
|
|
}
|
|
if (j != length-1)
|
|
{
|
|
proto_item_append_text(ti_pa, "%s",
|
|
(type == AS_SET || type == AS_CONFED_SET) ?
|
|
", " : " ");
|
|
proto_item_append_text(ti, "%s",
|
|
(type == AS_SET || type == AS_CONFED_SET) ?
|
|
", " : " ");
|
|
}
|
|
q += asn_len;
|
|
}
|
|
switch(type)
|
|
{
|
|
case AS_SET:
|
|
proto_item_append_text(ti_pa, "} ");
|
|
proto_item_append_text(ti, "}");
|
|
break;
|
|
case AS_CONFED_SET:
|
|
proto_item_append_text(ti_pa, "] ");
|
|
proto_item_append_text(ti, "]");
|
|
break;
|
|
case AS_CONFED_SEQUENCE:
|
|
proto_item_append_text(ti_pa, ") ");
|
|
proto_item_append_text(ti, ")");
|
|
break;
|
|
default:
|
|
proto_item_append_text(ti_pa, " ");
|
|
break;
|
|
}
|
|
}
|
|
|
|
break;
|
|
case BGPTYPE_NEXT_HOP:
|
|
if (tlen != 4) {
|
|
proto_tree_add_text(subtree2, tvb, o + i + aoff, tlen,
|
|
"Next hop (invalid): %u byte%s", tlen,
|
|
plurality(tlen, "", "s"));
|
|
} else {
|
|
proto_tree_add_item(subtree2, hf_bgp_update_path_attribute_next_hop, tvb,
|
|
o + i + aoff, 4, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(ti_pa, ": %s ", tvb_ip_to_str(tvb, o + i + aoff));
|
|
}
|
|
break;
|
|
case BGPTYPE_MULTI_EXIT_DISC:
|
|
if (tlen != 4) {
|
|
proto_tree_add_text(subtree2, tvb, o + i + aoff, tlen,
|
|
"Multiple exit discriminator (invalid): %u byte%s",
|
|
tlen, plurality(tlen, "", "s"));
|
|
} else {
|
|
proto_tree_add_item(subtree2, hf_bgp_update_path_attribute_multi_exit_disc, tvb,
|
|
o + i + aoff, tlen, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(ti_pa,": %u", tvb_get_ntohl(tvb, o + i + aoff));
|
|
}
|
|
break;
|
|
case BGPTYPE_LOCAL_PREF:
|
|
if (tlen != 4) {
|
|
proto_tree_add_text(subtree2, tvb, o + i + aoff, tlen,
|
|
"Local preference (invalid): %u byte%s", tlen,
|
|
plurality(tlen, "", "s"));
|
|
} else {
|
|
proto_tree_add_item(subtree2, hf_bgp_update_path_attribute_local_pref, tvb,
|
|
o + i + aoff, tlen, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(ti_pa, ": %u", tvb_get_ntohl(tvb, o + i + aoff));
|
|
}
|
|
break;
|
|
case BGPTYPE_ATOMIC_AGGREGATE:
|
|
if (tlen != 0) {
|
|
proto_tree_add_text(subtree2, tvb, o + i + aoff, tlen,
|
|
"Atomic aggregate (invalid): %u byte%s", tlen,
|
|
plurality(tlen, "", "s"));
|
|
}
|
|
break;
|
|
case BGPTYPE_AGGREGATOR:
|
|
if (tlen != 6 && tlen != 8) {
|
|
proto_tree_add_text(subtree2, tvb, o + i + aoff, tlen,
|
|
"Aggregator (invalid): %u byte%s", tlen,
|
|
plurality(tlen, "", "s"));
|
|
break;
|
|
}
|
|
case BGPTYPE_AS4_AGGREGATOR:
|
|
if (bgpa_type == BGPTYPE_AS4_AGGREGATOR && tlen != 8)
|
|
proto_tree_add_text(subtree2, tvb, o + i + aoff, tlen,
|
|
"Aggregator (invalid): %u byte%s", tlen,
|
|
plurality(tlen, "", "s"));
|
|
else {
|
|
asn_len = tlen - 4;
|
|
aggregator_as = (asn_len == 2) ?
|
|
tvb_get_ntohs(tvb, o + i + aoff) :
|
|
tvb_get_ntohl(tvb, o + i + aoff);
|
|
proto_tree_add_uint(subtree2, hf_bgp_update_path_attribute_aggregator_as, tvb,
|
|
o + i + aoff, asn_len, aggregator_as);
|
|
proto_tree_add_item(subtree2, hf_bgp_update_path_attribute_aggregator_origin, tvb,
|
|
o + i + aoff + asn_len, 4, ENC_BIG_ENDIAN);
|
|
|
|
proto_item_append_text(ti_pa, ": AS: %u origin: %s", aggregator_as,
|
|
tvb_ip_to_str(tvb, o + i + aoff + asn_len));
|
|
}
|
|
break;
|
|
case BGPTYPE_COMMUNITIES:
|
|
if (tlen % 4 != 0) {
|
|
proto_tree_add_text(subtree2, tvb, o + i + aoff, tlen,
|
|
"Communities (invalid): %u byte%s", tlen,
|
|
plurality(tlen, "", "s"));
|
|
break;
|
|
}
|
|
|
|
proto_item_append_text(ti_pa, ": ");
|
|
|
|
ti_communities = proto_tree_add_item(subtree2, hf_bgp_update_path_attribute_communities,
|
|
tvb, o + i + aoff, tlen, ENC_NA);
|
|
|
|
communities_tree = proto_item_add_subtree(ti_communities,
|
|
ett_bgp_communities);
|
|
proto_item_append_text(ti_communities, ": ");
|
|
/* (o + i + aoff) =
|
|
(o + current attribute + aoff bytes to first tuple) */
|
|
q = o + i + aoff;
|
|
end = q + tlen;
|
|
|
|
/* snarf each community */
|
|
while (q < end) {
|
|
/* check for reserved values */
|
|
guint32 community = tvb_get_ntohl(tvb, q);
|
|
if ((community & 0xFFFF0000) == FOURHEX0 ||
|
|
(community & 0xFFFF0000) == FOURHEXF) {
|
|
proto_tree_add_item(communities_tree, hf_bgp_update_path_attribute_community_well_known,
|
|
tvb, q - 3 + aoff, 4, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(ti_pa, "%s ", val_to_str_const(community, community_vals, "Reserved"));
|
|
proto_item_append_text(ti_communities, "%s ", val_to_str_const(community, community_vals, "Reserved"));
|
|
}
|
|
else {
|
|
ti_community = proto_tree_add_item(communities_tree, hf_bgp_update_path_attribute_community, tvb,
|
|
q - 3 + aoff, 4, ENC_NA);
|
|
community_tree = proto_item_add_subtree(ti_community,
|
|
ett_bgp_community);
|
|
proto_tree_add_item(community_tree, hf_bgp_update_path_attribute_community_as,
|
|
tvb, q - 3 + aoff, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(community_tree, hf_bgp_update_path_attribute_community_value,
|
|
tvb, q - 1 + aoff, 2, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(ti_pa, "%u:%u ",tvb_get_ntohs(tvb, q - 3),
|
|
tvb_get_ntohs(tvb, q -1));
|
|
proto_item_append_text(ti_communities, "%u:%u ",tvb_get_ntohs(tvb, q - 3),
|
|
tvb_get_ntohs(tvb, q -1));
|
|
proto_item_append_text(ti_community, ": %u:%u ",tvb_get_ntohs(tvb, q - 3),
|
|
tvb_get_ntohs(tvb, q -1));
|
|
}
|
|
|
|
q += 4;
|
|
}
|
|
|
|
|
|
break;
|
|
case BGPTYPE_ORIGINATOR_ID:
|
|
if (tlen != 4) {
|
|
proto_tree_add_text(subtree2, tvb, o + i + aoff, tlen,
|
|
"Originator identifier (invalid): %u byte%s", tlen,
|
|
plurality(tlen, "", "s"));
|
|
} else {
|
|
proto_tree_add_item(subtree2, hf_bgp_update_path_attribute_originator_id, tvb,
|
|
o + i + aoff, tlen, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(ti_pa, ": %s ", tvb_ip_to_str(tvb, o + i + aoff));
|
|
}
|
|
break;
|
|
case BGPTYPE_MP_REACH_NLRI:
|
|
/*
|
|
* RFC 2545 specifies that there may be more than one
|
|
* address in the MP_REACH_NLRI attribute in section
|
|
* 3, "Constructing the Next Hop field".
|
|
*
|
|
* Yes, RFC 2858 says you can't do that, and, yes, RFC
|
|
* 2858 obsoletes RFC 2283, which says you can do that,
|
|
* but that doesn't mean we shouldn't dissect packets
|
|
* that conform to RFC 2283 but not RFC 2858, as some
|
|
* device on the network might implement the 2283-style
|
|
* BGP extensions rather than RFC 2858-style extensions.
|
|
*/
|
|
af = tvb_get_ntohs(tvb, o + i + aoff);
|
|
proto_tree_add_text(subtree2, tvb, o + i + aoff, 2,
|
|
"Address family: %s (%u)",
|
|
val_to_str_const(af, afn_vals, "Unknown"), af);
|
|
saf = tvb_get_guint8(tvb, o + i + aoff + 2) ;
|
|
proto_tree_add_text(subtree2, tvb, o + i + aoff + 2, 1,
|
|
"Subsequent address family identifier: %s (%u)",
|
|
val_to_str_const(saf, bgpattr_nlri_safi, saf >= 134 ? "Vendor specific" : "Unknown"),
|
|
saf);
|
|
nexthop_len = tvb_get_guint8(tvb, o + i + aoff + 3);
|
|
ti = proto_tree_add_text(subtree2, tvb, o + i + aoff + 3,
|
|
nexthop_len + 1,
|
|
"Next hop network address (%d byte%s)",
|
|
nexthop_len, plurality(nexthop_len, "", "s"));
|
|
subtree3 = proto_item_add_subtree(ti, ett_bgp_mp_nhna);
|
|
|
|
/*
|
|
* The addresses don't contain lengths, so if we
|
|
* don't understand the address family type, we
|
|
* cannot parse the subsequent addresses as we
|
|
* don't know how long they are.
|
|
*/
|
|
switch (af) {
|
|
default:
|
|
proto_tree_add_text(subtree3, tvb, o + i + aoff + 4,
|
|
nexthop_len, "Unknown Address Family");
|
|
break;
|
|
|
|
case AFNUM_INET:
|
|
case AFNUM_INET6:
|
|
case AFNUM_L2VPN:
|
|
case AFNUM_L2VPN_OLD:
|
|
case AFNUM_LINK_STATE:
|
|
|
|
j = 0;
|
|
while (j < nexthop_len) {
|
|
advance = mp_addr_to_str(af, saf, tvb, o + i + aoff + 4 + j,
|
|
junk_emstr, nexthop_len) ;
|
|
if (advance == 0) /* catch if this is a unknown AFI type*/
|
|
break;
|
|
if (j + advance > nexthop_len)
|
|
break;
|
|
proto_tree_add_text(subtree3, tvb,o + i + aoff + 4 + j,
|
|
advance, "Next hop: %s (%u)",
|
|
wmem_strbuf_get_str(junk_emstr), advance);
|
|
j += advance;
|
|
}
|
|
break;
|
|
} /* switch (af) */
|
|
|
|
aoff_save = aoff;
|
|
tlen -= nexthop_len + 4;
|
|
aoff += nexthop_len + 4 ;
|
|
|
|
off = 0;
|
|
snpa = tvb_get_guint8(tvb, o + i + aoff);
|
|
ti = proto_tree_add_text(subtree2, tvb, o + i + aoff, 1,
|
|
"Subnetwork points of attachment: %u", snpa);
|
|
off++;
|
|
if (snpa) {
|
|
subtree3 = proto_item_add_subtree(ti, ett_bgp_mp_snpa);
|
|
for (/*nothing*/; snpa > 0; snpa--) {
|
|
proto_tree_add_text(subtree3, tvb, o + i + aoff + off, 1,
|
|
"SNPA length: %u", tvb_get_guint8(tvb, o + i + aoff + off));
|
|
off++;
|
|
proto_tree_add_text(subtree3, tvb, o + i + aoff + off,
|
|
tvb_get_guint8(tvb, o + i + aoff + off - 1),
|
|
"SNPA (%u byte%s)", tvb_get_guint8(tvb, o + i + aoff + off - 1),
|
|
plurality(tvb_get_guint8(tvb, o + i + aoff + off - 1), "", "s"));
|
|
off += tvb_get_guint8(tvb, o + i + aoff + off - 1);
|
|
}
|
|
}
|
|
tlen -= off;
|
|
aoff += off;
|
|
|
|
ti = proto_tree_add_text(subtree2, tvb, o + i + aoff, tlen,
|
|
"Network layer reachability information (%u byte%s)",
|
|
tlen, plurality(tlen, "", "s"));
|
|
if (tlen) {
|
|
subtree3 = proto_item_add_subtree(ti,ett_bgp_mp_reach_nlri);
|
|
if (af != AFNUM_INET && af != AFNUM_INET6 && af != AFNUM_L2VPN && af != AFNUM_LINK_STATE) {
|
|
proto_tree_add_text(subtree3, tvb, o + i + aoff,
|
|
tlen, "Unknown Address Family");
|
|
} else {
|
|
while (tlen > 0) {
|
|
advance = decode_prefix_MP(subtree3,
|
|
hf_bgp_mp_reach_nlri_ipv4_prefix,
|
|
-1,
|
|
af, saf,
|
|
tvb, o + i + aoff, "MP Reach NLRI", pinfo);
|
|
if (advance < 0)
|
|
break;
|
|
tlen -= advance;
|
|
aoff += advance;
|
|
}
|
|
}
|
|
}
|
|
aoff = aoff_save;
|
|
break;
|
|
case BGPTYPE_MP_UNREACH_NLRI:
|
|
af = tvb_get_ntohs(tvb, o + i + aoff);
|
|
proto_tree_add_text(subtree2, tvb, o + i + aoff, 2,
|
|
"Address family: %s (%u)",
|
|
val_to_str_const(af, afn_vals, "Unknown"), af);
|
|
saf = tvb_get_guint8(tvb, o + i + aoff + 2) ;
|
|
proto_tree_add_text(subtree2, tvb, o + i + aoff + 2, 1,
|
|
"Subsequent address family identifier: %s (%u)",
|
|
val_to_str_const(saf, bgpattr_nlri_safi, saf >= 134 ? "Vendor specific" : "Unknown"),
|
|
saf);
|
|
ti = proto_tree_add_text(subtree2, tvb, o + i + aoff + 3,
|
|
tlen - 3, "Withdrawn routes (%u byte%s)", tlen - 3,
|
|
plurality(tlen - 3, "", "s"));
|
|
|
|
aoff_save = aoff;
|
|
tlen -= 3;
|
|
aoff += 3;
|
|
if (tlen > 0) {
|
|
subtree3 = proto_item_add_subtree(ti,ett_bgp_mp_unreach_nlri);
|
|
|
|
while (tlen > 0) {
|
|
advance = decode_prefix_MP(subtree3,
|
|
hf_bgp_mp_unreach_nlri_ipv4_prefix,
|
|
-1,
|
|
af, saf,
|
|
tvb, o + i + aoff, "MP Unreach NLRI", pinfo);
|
|
if (advance < 0)
|
|
break;
|
|
tlen -= advance;
|
|
aoff += advance;
|
|
}
|
|
}
|
|
aoff = aoff_save;
|
|
break;
|
|
case BGPTYPE_CLUSTER_LIST:
|
|
if (tlen % 4 != 0) {
|
|
proto_tree_add_text(subtree2, tvb, o + i + aoff, tlen,
|
|
"Cluster list (invalid): %u byte%s", tlen,
|
|
plurality(tlen, "", "s"));
|
|
break;
|
|
}
|
|
|
|
/* (o + i + aoff) =
|
|
(o + current attribute + aoff bytes to first tuple) */
|
|
q = o + i + aoff;
|
|
end = q + tlen;
|
|
/* must be freed by second switch! */
|
|
/* "tlen * 16" (12 digits, 3 dots + space ) should be
|
|
a good estimate of how long the cluster_list string could
|
|
be */
|
|
if (cluster_list_emstr == NULL)
|
|
cluster_list_emstr = wmem_strbuf_sized_new(wmem_packet_scope(), (tlen + 1) * 16, 0);
|
|
wmem_strbuf_truncate(cluster_list_emstr, 0);
|
|
|
|
/* snarf each cluster list */
|
|
while (q < end) {
|
|
wmem_strbuf_append_printf(cluster_list_emstr, "%s ", tvb_ip_to_str(tvb, q));
|
|
q += 4;
|
|
}
|
|
/* cleanup end of string */
|
|
wmem_strbuf_truncate(cluster_list_emstr, wmem_strbuf_get_len(cluster_list_emstr) - 1);
|
|
|
|
proto_item_append_text(ti_pa, ": %s", wmem_strbuf_get_str(cluster_list_emstr));
|
|
|
|
ti = proto_tree_add_text(subtree2, tvb, o + i + aoff, tlen,
|
|
"Cluster list: %s", cluster_list_emstr ?
|
|
wmem_strbuf_get_str(cluster_list_emstr) : "<none>");
|
|
cluster_list_tree = proto_item_add_subtree(ti,
|
|
ett_bgp_cluster_list);
|
|
|
|
/* (o + i + aoff) =
|
|
(o + current attribute + aoff bytes to first tuple) */
|
|
q = o + i + aoff;
|
|
end = q + tlen;
|
|
|
|
/* snarf each cluster identifier */
|
|
while (q < end) {
|
|
proto_tree_add_item(cluster_list_tree, hf_bgp_update_path_attribute_cluster_list,
|
|
tvb, q - 3 + aoff, 4, ENC_NA);
|
|
q += 4;
|
|
}
|
|
|
|
break;
|
|
case BGPTYPE_EXTENDED_COMMUNITY:
|
|
if (tlen %8 != 0) {
|
|
proto_tree_add_text(subtree2, tvb, o + i + aoff, tlen, "Extended community (invalid) : %u byte%s", tlen,
|
|
plurality(tlen, "", "s"));
|
|
} else {
|
|
q = o + i + aoff ;
|
|
end = o + i + aoff + tlen ;
|
|
ti = proto_tree_add_text(subtree2,tvb,q,tlen, "Carried Extended communities");
|
|
subtree3 = proto_item_add_subtree(ti,ett_bgp_extended_communities);
|
|
|
|
while (q < end) {
|
|
ext_com8 = tvb_get_guint8(tvb,q); /* handle regular types (8 bit) */
|
|
ext_com = tvb_get_ntohs(tvb,q); /* handle extended length types (16 bit) */
|
|
wmem_strbuf_truncate(junk_emstr, 0);
|
|
wmem_strbuf_append_printf(junk_emstr, "%s", val_to_str(ext_com8,bgpext_com8_type,"Unknown %d"));
|
|
is_regular_type = FALSE;
|
|
is_extended_type = FALSE;
|
|
/* handle regular types (8 bit) */
|
|
switch (ext_com8) {
|
|
case BGP_EXT_COM_QOS_MARK_T:
|
|
case BGP_EXT_COM_QOS_MARK_NT:
|
|
is_regular_type = TRUE;
|
|
ti = proto_tree_add_text(subtree3,tvb,q,8, "%s", wmem_strbuf_get_str(junk_emstr));
|
|
|
|
subtree4 = proto_item_add_subtree(ti,ett_bgp_extended_communities);
|
|
proto_tree_add_text(subtree4, tvb, q, 1,
|
|
"Type: 0x%02x", tvb_get_guint8(tvb,q));
|
|
ti = proto_tree_add_item(subtree4, hf_bgp_ext_com_qos_flags, tvb, q+1, 1, ENC_BIG_ENDIAN);
|
|
subtree5 = proto_item_add_subtree(ti,ett_bgp_ext_com_flags);
|
|
/* add flag bitfield */
|
|
proto_tree_add_item(subtree5, hf_bgp_ext_com_qos_flags_remarking, tvb, q+1, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(subtree5, hf_bgp_ext_com_qos_flags_ignore_remarking, tvb, q+1, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(subtree5, hf_bgp_ext_com_qos_flags_agg_marking, tvb, q+1, 1, ENC_BIG_ENDIAN);
|
|
|
|
proto_tree_add_item(subtree4, hf_bgp_ext_com_qos_set_number, tvb, q+2, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(subtree4, hf_bgp_ext_com_qos_tech_type, tvb, q+3, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(subtree4, hf_bgp_ext_com_qos_marking_o, tvb, q+4, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(subtree4, hf_bgp_ext_com_qos_marking_a, tvb, q+6, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(subtree4, hf_bgp_ext_com_qos_default_to_zero, tvb, q+7, 1, ENC_BIG_ENDIAN);
|
|
break;
|
|
case BGP_EXT_COM_COS_CAP_T:
|
|
is_regular_type = TRUE;
|
|
ti = proto_tree_add_text(subtree3,tvb,q,8, "%s", wmem_strbuf_get_str(junk_emstr));
|
|
|
|
subtree4 = proto_item_add_subtree(ti,ett_bgp_extended_communities);
|
|
proto_tree_add_text(subtree4, tvb, q, 1,
|
|
"Type: 0x%02x", tvb_get_guint8(tvb,q));
|
|
ti = proto_tree_add_item(subtree4, hf_bgp_ext_com_cos_flags, tvb, q+1, 1, ENC_BIG_ENDIAN);
|
|
subtree5 = proto_item_add_subtree(ti,ett_bgp_ext_com_flags);
|
|
/* add flag bitfield */
|
|
proto_tree_add_item(subtree5, hf_bgp_ext_com_cos_flags_be, tvb, q+1, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(subtree5, hf_bgp_ext_com_cos_flags_ef, tvb, q+1, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(subtree5, hf_bgp_ext_com_cos_flags_af, tvb, q+1, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(subtree5, hf_bgp_ext_com_cos_flags_le, tvb, q+1, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_text(subtree4, tvb, q+2, 1,
|
|
"Flags byte 2..7 : 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x",
|
|
tvb_get_guint8(tvb,q+2),tvb_get_guint8(tvb,q+3),tvb_get_guint8(tvb,q+4),
|
|
tvb_get_guint8(tvb,q+5),tvb_get_guint8(tvb,q+6),tvb_get_guint8(tvb,q+7));
|
|
break;
|
|
} /* switch (ext_com8) */
|
|
|
|
if (!is_regular_type) {
|
|
wmem_strbuf_truncate(junk_emstr, 0);
|
|
wmem_strbuf_append_printf(junk_emstr, "%s", val_to_str(ext_com,bgpext_com_type,"Unknown %d"));
|
|
|
|
/* handle extended length types (16 bit) */
|
|
switch (ext_com) {
|
|
case BGP_EXT_COM_RT_0:
|
|
case BGP_EXT_COM_RO_0:
|
|
is_extended_type = TRUE;
|
|
wmem_strbuf_append_printf(junk_emstr, ": %u%s%d",
|
|
tvb_get_ntohs(tvb,q+2),":",tvb_get_ntohl(tvb,q+4));
|
|
proto_tree_add_text(subtree3,tvb,q,8, "%s", wmem_strbuf_get_str(junk_emstr));
|
|
break ;
|
|
case BGP_EXT_COM_RT_1:
|
|
case BGP_EXT_COM_RO_1:
|
|
is_extended_type = TRUE;
|
|
ipaddr = tvb_get_ipv4(tvb,q+2);
|
|
wmem_strbuf_append_printf(junk_emstr, ": %s%s%u",
|
|
ip_to_str((guint8 *)&ipaddr),":",tvb_get_ntohs(tvb,q+6));
|
|
proto_tree_add_text(subtree3,tvb,q,8, "%s", wmem_strbuf_get_str(junk_emstr));
|
|
break;
|
|
case BGP_EXT_COM_RT_2:
|
|
case BGP_EXT_COM_RO_2:
|
|
is_extended_type = TRUE;
|
|
wmem_strbuf_append_printf(junk_emstr, ": %u.%u:%u",
|
|
tvb_get_ntohs(tvb,q+2),tvb_get_ntohs(tvb,q+4) ,tvb_get_ntohs(tvb,q+6));
|
|
proto_tree_add_text(subtree3,tvb,q,8, "%s", wmem_strbuf_get_str(junk_emstr));
|
|
break;
|
|
case BGP_EXT_COM_VPN_ORIGIN:
|
|
case BGP_EXT_COM_OSPF_RID:
|
|
is_extended_type = TRUE;
|
|
ipaddr = tvb_get_ipv4(tvb,q+2);
|
|
wmem_strbuf_append_printf(junk_emstr, ": %s", ip_to_str((guint8 *)&ipaddr));
|
|
proto_tree_add_text(subtree3,tvb,q,8, "%s", wmem_strbuf_get_str(junk_emstr));
|
|
break;
|
|
case BGP_EXT_COM_OSPF_RTYPE:
|
|
is_extended_type = TRUE;
|
|
ipaddr = tvb_get_ipv4(tvb,q+2);
|
|
wmem_strbuf_append_printf(junk_emstr, ": Area: %s, Type: %s", ip_to_str((guint8 *)&ipaddr),
|
|
val_to_str_const(tvb_get_guint8(tvb,q+6),bgpext_ospf_rtype,"Unknown"));
|
|
/* print OSPF Metric type if selected */
|
|
/* always print E2 even if not external route -- receiving router should ignore */
|
|
if ( (tvb_get_guint8(tvb,q+7)) & BGP_OSPF_RTYPE_METRIC_TYPE ) {
|
|
wmem_strbuf_append(junk_emstr, " E2");
|
|
} else if ((tvb_get_guint8(tvb,q+6)==BGP_OSPF_RTYPE_EXT) || (tvb_get_guint8(tvb,q+6)==BGP_OSPF_RTYPE_NSSA)) {
|
|
wmem_strbuf_append(junk_emstr, " E1");
|
|
} else {
|
|
wmem_strbuf_append(junk_emstr, ", no options");
|
|
}
|
|
proto_tree_add_text(subtree3,tvb,q,8, "%s", wmem_strbuf_get_str(junk_emstr));
|
|
break;
|
|
case BGP_EXT_COM_LINKBAND:
|
|
is_extended_type = TRUE;
|
|
as_num = tvb_get_ntohs(tvb,q+2);
|
|
linkband = tvb_get_ntohieee_float(tvb,q+4);
|
|
wmem_strbuf_append_printf(junk_emstr, ": ASN %u, %.3f Mbps", as_num,linkband*8/1000000);
|
|
proto_tree_add_text(subtree3,tvb,q,8, "%s", wmem_strbuf_get_str(junk_emstr));
|
|
break;
|
|
case BGP_EXT_COM_L2INFO:
|
|
is_extended_type = TRUE;
|
|
ti = proto_tree_add_text(subtree3,tvb,q,8, "%s", wmem_strbuf_get_str(junk_emstr));
|
|
|
|
subtree4 = proto_item_add_subtree(ti,ett_bgp_extended_communities);
|
|
proto_tree_add_item(subtree4, hf_bgp_ext_com_l2_encaps,tvb,q+2, 1, ENC_BIG_ENDIAN);
|
|
sub_ti = proto_tree_add_item(subtree4, hf_bgp_ext_com_l2_c_flags, tvb, q+3, 1, ENC_BIG_ENDIAN);
|
|
subtree5 = proto_item_add_subtree(sub_ti, ett_bgp_ext_com_l2_flags);
|
|
proto_tree_add_item(subtree5, hf_bgp_ext_com_l2_flag_d, tvb, q+3, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(subtree5, hf_bgp_ext_com_l2_flag_z1, tvb, q+3, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(subtree5, hf_bgp_ext_com_l2_flag_f, tvb, q+3, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(subtree5, hf_bgp_ext_com_l2_flag_z345, tvb, q+3, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(subtree5, hf_bgp_ext_com_l2_flag_c, tvb, q+3, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(subtree5, hf_bgp_ext_com_l2_flag_s, tvb, q+3, 1, ENC_BIG_ENDIAN);
|
|
|
|
proto_tree_add_item(subtree4, hf_bgp_ext_com_l2_mtu, tvb, q+4, 2, ENC_BIG_ENDIAN);
|
|
break;
|
|
case BGP_EXT_COM_FLOW_ACT:
|
|
is_extended_type = TRUE;
|
|
proto_tree_add_text(subtree3,tvb,q,2,"Flow Spec Traffic Action");
|
|
proto_tree_add_item(subtree3,hf_bgp_ext_com_flow_act_allset , tvb, q+2, 5, ENC_NA);
|
|
proto_tree_add_item(subtree3,hf_bgp_ext_com_flow_act_samp_act,tvb,q+7,1,ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(subtree3,hf_bgp_ext_com_flow_act_term_act,tvb,q+7,1,ENC_BIG_ENDIAN);
|
|
break;
|
|
case BGP_EXT_COM_FLOW_MARK:
|
|
is_extended_type = TRUE;
|
|
proto_tree_add_text(subtree3,tvb,q,2,"Flow Spec Traffic Mark");
|
|
break;
|
|
case BGP_EXT_COM_FLOW_RATE:
|
|
is_extended_type = TRUE;
|
|
proto_tree_add_text(subtree3,tvb,q,2,"Flow Spec Traffic Rate Limit");
|
|
/* the 2 first bytes are 2 bytes ASN or 2 least significant bytes of a 4 byte ASN */
|
|
proto_tree_add_item(subtree3, hf_bgp_update_path_attribute_community_as,
|
|
tvb, q+2, 2, ENC_BIG_ENDIAN);
|
|
/* remaining 4 bytes gives traffic rate in IEEE floating point */
|
|
proto_tree_add_item(subtree3, hf_bgp_ext_com_flow_rate_float,tvb,q+4,4,ENC_BIG_ENDIAN);
|
|
break;
|
|
case BGP_EXT_COM_FLOW_RDIR:
|
|
is_extended_type = TRUE;
|
|
ti = proto_tree_add_item(subtree3,hf_bgp_ext_com_flow_redir,tvb,q,8,ENC_NA);
|
|
subtree4 = proto_item_add_subtree(ti, ett_bgp_extended_com_fspec_redir);
|
|
proto_tree_add_text(subtree4,tvb,q,2,"Flow Spec Traffic Redirect");
|
|
/* flow spec RFC doesn't allow to specify RT format, */
|
|
/* decoded by default as (2 bytes):an (4 byes) */
|
|
proto_tree_add_item(subtree4,hf_bgp_ext_com_flow_redir_as,tvb,q+2,2,ENC_NA);
|
|
proto_tree_add_item(subtree4,hf_bgp_ext_com_flow_redir_an,tvb,q+4,4,ENC_NA);
|
|
proto_item_append_text(ti," RT %u:%u",tvb_get_ntohs(tvb,q+2),tvb_get_ntohl(tvb,q+4));
|
|
break;
|
|
} /* switch (ext_com) */
|
|
}
|
|
if (!is_regular_type && !is_extended_type)
|
|
proto_tree_add_text(subtree3,tvb,q,8, "%s","Unknown");
|
|
q = q + 8;
|
|
}
|
|
}
|
|
break;
|
|
case BGPTYPE_SAFI_SPECIFIC_ATTR:
|
|
q = o + i + aoff;
|
|
end = o + i + aoff + tlen ;
|
|
|
|
while(q < end) {
|
|
ssa_type = tvb_get_ntohs(tvb, q) & BGP_SSA_TYPE;
|
|
ssa_len = tvb_get_ntohs(tvb, q + 2);
|
|
|
|
ti = proto_tree_add_text(subtree2, tvb, q, MIN(ssa_len + 4, end - q),
|
|
"%s Information",
|
|
val_to_str_const(ssa_type, bgp_ssa_type, "Unknown SSA"));
|
|
subtree3 = proto_item_add_subtree(ti, ett_bgp_ssa);
|
|
|
|
proto_tree_add_item(subtree3, hf_bgp_ssa_t, tvb,
|
|
q, 1, ENC_BIG_ENDIAN);
|
|
hidden_item = proto_tree_add_item(subtree3, hf_bgp_ssa_type, tvb,
|
|
q, 2, ENC_BIG_ENDIAN);
|
|
PROTO_ITEM_SET_HIDDEN(hidden_item);
|
|
proto_tree_add_text(subtree3, tvb, q, 2,
|
|
"Type: %s", val_to_str_const(ssa_type, bgp_ssa_type, "Unknown"));
|
|
if ((ssa_len == 0) || (q + ssa_len > end)) {
|
|
proto_tree_add_text(subtree3, tvb, q + 2, end - q - 2,
|
|
"Invalid Length of %u", ssa_len);
|
|
break;
|
|
}
|
|
proto_tree_add_item(subtree3, hf_bgp_ssa_len, tvb,
|
|
q + 2, 2, ENC_BIG_ENDIAN);
|
|
|
|
switch (ssa_type) {
|
|
case BGP_SSA_L2TPv3:
|
|
proto_tree_add_item(subtree3, hf_bgp_ssa_l2tpv3_pref, tvb,
|
|
q + 4, 2, ENC_BIG_ENDIAN);
|
|
|
|
ti = proto_tree_add_text(subtree3, tvb, q + 6, 1, "Flags");
|
|
subtree4 = proto_item_add_subtree(ti, ett_bgp_ssa_subtree) ;
|
|
proto_tree_add_item(subtree4, hf_bgp_ssa_l2tpv3_s, tvb,
|
|
q + 6, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(subtree4, hf_bgp_ssa_l2tpv3_unused, tvb,
|
|
q + 6, 1, ENC_BIG_ENDIAN);
|
|
|
|
ssa_v3_len = tvb_get_guint8(tvb, q + 7);
|
|
if (ssa_v3_len + 8 == ssa_len){
|
|
proto_tree_add_item(subtree3, hf_bgp_ssa_l2tpv3_cookie_len, tvb,
|
|
q + 7, 1, ENC_BIG_ENDIAN);
|
|
} else {
|
|
proto_tree_add_text(subtree3, tvb, q + 7, 1,
|
|
"Invalid Cookie Length of %u", ssa_v3_len);
|
|
q += ssa_len + 4; /* 4 from type and length */
|
|
break;
|
|
}
|
|
proto_tree_add_item(subtree3, hf_bgp_ssa_l2tpv3_session_id, tvb,
|
|
q + 8, 4, ENC_BIG_ENDIAN);
|
|
if (ssa_v3_len)
|
|
proto_tree_add_item(subtree3, hf_bgp_ssa_l2tpv3_cookie, tvb,
|
|
q + 12, ssa_v3_len, ENC_NA);
|
|
q += ssa_len + 4; /* 4 from type and length */
|
|
break;
|
|
case BGP_SSA_mGRE:
|
|
case BGP_SSA_IPSec:
|
|
case BGP_SSA_MPLS:
|
|
default:
|
|
proto_tree_add_item(subtree3, hf_bgp_ssa_value, tvb,
|
|
q + 4, ssa_len, ENC_NA);
|
|
q += ssa_len + 4; /* 4 from type and length */
|
|
break;
|
|
case BGP_SSA_L2TPv3_IN_IPSec:
|
|
case BGP_SSA_mGRE_IN_IPSec:
|
|
/* These contain BGP_SSA_IPSec and BGP_SSA_L2TPv3/BGP_SSA_mGRE */
|
|
q += 4; /* 4 from type and length */
|
|
break;
|
|
} /* switch (bgpa.bgpa_type) */
|
|
}
|
|
break;
|
|
case BGPTYPE_TUNNEL_ENCAPS_ATTR:
|
|
q = o + i + aoff;
|
|
end = o + i + aoff + tlen;
|
|
|
|
ti = proto_tree_add_text(subtree2, tvb, q, tlen, "TLV Encodings");
|
|
subtree3 = proto_item_add_subtree(ti, ett_bgp_tunnel_tlv);
|
|
|
|
while (q < end) {
|
|
encaps_tunnel_type = tvb_get_ntohs(tvb, q);
|
|
encaps_tunnel_len = tvb_get_ntohs(tvb, q + 2);
|
|
|
|
ti = proto_tree_add_text(subtree3, tvb, q, encaps_tunnel_len + 4, "%s (%u bytes)", val_to_str_const(encaps_tunnel_type, tunnel_type, "Unknown"), encaps_tunnel_len + 4);
|
|
subtree4 = proto_item_add_subtree(ti, ett_bgp_tunnel_tlv_subtree);
|
|
|
|
proto_tree_add_item(subtree4, hf_bgp_update_encaps_tunnel_tlv_type, tvb, q, 2, ENC_NA);
|
|
proto_tree_add_item(subtree4, hf_bgp_update_encaps_tunnel_tlv_len, tvb, q + 2, 2, ENC_NA);
|
|
|
|
ti = proto_tree_add_text(subtree4, tvb, q + 4, encaps_tunnel_len, "Sub-TLV Encodings");
|
|
subtree5 = proto_item_add_subtree(ti, ett_bgp_tunnel_subtlv);
|
|
|
|
q += 4;
|
|
j = q + encaps_tunnel_len;
|
|
while ( q < j ) {
|
|
encaps_tunnel_subtype = tvb_get_guint8(tvb, q);
|
|
encaps_tunnel_sublen = tvb_get_guint8(tvb, q + 1);
|
|
|
|
ti = proto_tree_add_text(subtree5, tvb, q, encaps_tunnel_sublen + 2, "%s (%u bytes)", val_to_str_const(encaps_tunnel_subtype, subtlv_type, "Unknown"), encaps_tunnel_sublen + 2);
|
|
subtree6 = proto_item_add_subtree(ti, ett_bgp_tunnel_tlv_subtree);
|
|
|
|
proto_tree_add_item(subtree6, hf_bgp_update_encaps_tunnel_subtlv_type, tvb, q, 1, ENC_NA);
|
|
proto_tree_add_item(subtree6, hf_bgp_update_encaps_tunnel_subtlv_len, tvb, q + 1, 1, ENC_NA);
|
|
|
|
switch (encaps_tunnel_subtype) {
|
|
case TUNNEL_SUBTLV_ENCAPSULATION:
|
|
if (encaps_tunnel_type == TUNNEL_TYPE_L2TP_OVER_IP) {
|
|
proto_tree_add_text(subtree6, tvb, q + 2, 4, "Session ID: %u", tvb_get_letohl(tvb, q + 2));
|
|
proto_tree_add_text(subtree6, tvb, q + 6, encaps_tunnel_sublen - 4, "Cookie: %s", tvb_bytes_to_ep_str(tvb, q + 6, encaps_tunnel_sublen - 4));
|
|
} else if (encaps_tunnel_type == TUNNEL_TYPE_GRE) {
|
|
proto_tree_add_text(subtree6, tvb, q + 2, encaps_tunnel_sublen, "GRE key: %x", tvb_get_letohl(tvb, q + 2));
|
|
}
|
|
break;
|
|
case TUNNEL_SUBTLV_PROTO_TYPE:
|
|
proto_tree_add_text(subtree6, tvb, q + 2, encaps_tunnel_sublen, "Protocol type: %s (0x%x)", val_to_str_const(tvb_get_ntohs(tvb, q + 2), etype_vals, "Unknown"), tvb_get_ntohs(tvb, q + 2));
|
|
break;
|
|
case TUNNEL_SUBTLV_COLOR:
|
|
proto_tree_add_text(subtree6, tvb, q + 6, encaps_tunnel_sublen - 4, "Color value: %u", tvb_get_letohl(tvb, q + 6));
|
|
break;
|
|
case TUNNEL_SUBTLV_LOAD_BALANCE:
|
|
if (encaps_tunnel_type == TUNNEL_TYPE_L2TP_OVER_IP || encaps_tunnel_type == TUNNEL_TYPE_GRE) {
|
|
proto_tree_add_text(subtree6, tvb, q + 2, encaps_tunnel_sublen, "Load-balancing block length: %u", tvb_get_ntohs(tvb, q + 2));
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
} /* switch (encaps_tunnel_subtype) */
|
|
|
|
q += 2 + encaps_tunnel_sublen; /* type and length + length of value */
|
|
}
|
|
|
|
}
|
|
|
|
break;
|
|
case BGPTYPE_LINK_STATE_ATTR:
|
|
|
|
q = o + i + aoff;
|
|
end = o + i + aoff + tlen;
|
|
|
|
ti = proto_tree_add_item(subtree2, hf_bgp_update_path_attribute_link_state, tvb, q, tlen, ENC_NA);
|
|
subtree3 = proto_item_add_subtree(ti, ett_bgp_link_state);
|
|
|
|
while (q < end) {
|
|
advance = decode_link_state_attribute_tlv(subtree3, tvb, q, pinfo);
|
|
if (advance < 0)
|
|
break;
|
|
|
|
q += advance;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_text(subtree2, tvb, o + i + aoff, tlen,
|
|
"Unknown (%u byte%s)", tlen, plurality(tlen, "", "s"));
|
|
break;
|
|
} /* switch (bgpa.bgpa_type) */ /* end of second switch */
|
|
|
|
i += alen + aoff;
|
|
}
|
|
|
|
o += 2 + len;
|
|
|
|
/* NLRI */
|
|
len = hlen - o;
|
|
|
|
/* parse prefixes */
|
|
if (len > 0) {
|
|
ti = proto_tree_add_item(tree, hf_bgp_update_nlri, tvb, o, len, ENC_NA);
|
|
subtree = proto_item_add_subtree(ti, ett_bgp_nlri);
|
|
end = o + len;
|
|
/* Heuristic to detect if IPv4 prefix are using Path Identifiers */
|
|
if( detect_add_path_prefix4(tvb, o, end) ) {
|
|
/* IPv4 prefixes with Path Id */
|
|
while (o < end) {
|
|
i = decode_path_prefix4(subtree, hf_bgp_nlri_path_id, hf_bgp_nlri_prefix, tvb, o,
|
|
"NLRI");
|
|
if (i < 0)
|
|
return;
|
|
o += i;
|
|
}
|
|
} else {
|
|
/* Standard prefixes */
|
|
while (o < end) {
|
|
i = decode_prefix4(subtree, NULL, hf_bgp_nlri_prefix, tvb, o, 0,
|
|
"NLRI");
|
|
if (i < 0)
|
|
return;
|
|
o += i;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Dissect a BGP NOTIFICATION message.
|
|
*/
|
|
static void
|
|
dissect_bgp_notification(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo)
|
|
{
|
|
int hlen; /* message length */
|
|
int offset;
|
|
guint major_error;
|
|
proto_item *ti;
|
|
|
|
hlen = tvb_get_ntohs(tvb, BGP_MARKER_SIZE);
|
|
offset = BGP_MARKER_SIZE + 2 + 1;
|
|
|
|
|
|
/* print error code */
|
|
proto_tree_add_item(tree, hf_bgp_notify_major_error, tvb, offset, 1, ENC_NA);
|
|
major_error = tvb_get_guint8(tvb, offset);
|
|
offset += 1;
|
|
|
|
switch(major_error){
|
|
case BGP_MAJOR_ERROR_MSG_HDR:
|
|
proto_tree_add_item(tree, hf_bgp_notify_minor_msg_hdr, tvb, offset, 1, ENC_NA);
|
|
break;
|
|
case BGP_MAJOR_ERROR_OPEN_MSG:
|
|
proto_tree_add_item(tree, hf_bgp_notify_minor_open_msg, tvb, offset, 1, ENC_NA);
|
|
break;
|
|
case BGP_MAJOR_ERROR_UPDATE_MSG:
|
|
proto_tree_add_item(tree,hf_bgp_notify_minor_update_msg, tvb, offset, 1, ENC_NA);
|
|
break;
|
|
case BGP_MAJOR_ERROR_HT_EXPIRED:
|
|
proto_tree_add_item(tree, hf_bgp_notify_minor_ht_expired, tvb, offset, 1, ENC_NA);
|
|
break;
|
|
case BGP_MAJOR_ERROR_STATE_MACHINE:
|
|
proto_tree_add_item(tree, hf_bgp_notify_minor_state_machine, tvb, offset, 1, ENC_NA);
|
|
break;
|
|
case BGP_MAJOR_ERROR_CEASE:
|
|
proto_tree_add_item(tree, hf_bgp_notify_minor_cease, tvb, offset, 1, ENC_NA);
|
|
break;
|
|
case BGP_MAJOR_ERROR_CAP_MSG:
|
|
proto_tree_add_item(tree, hf_bgp_notify_minor_cap_msg, tvb, offset, 1, ENC_NA);
|
|
break;
|
|
default:
|
|
ti = proto_tree_add_item(tree, hf_bgp_notify_minor_unknown, tvb, offset, 1, ENC_NA);
|
|
expert_add_info_format(pinfo, ti, &ei_bgp_notify_minor_unknown, "Unknown notification error (%d)",major_error);
|
|
break;
|
|
}
|
|
offset += 1;
|
|
|
|
/* only print if there is optional data */
|
|
if (hlen > BGP_MIN_NOTIFICATION_MSG_SIZE) {
|
|
proto_tree_add_item(tree, hf_bgp_notify_data, tvb, offset, hlen - BGP_MIN_NOTIFICATION_MSG_SIZE, ENC_NA);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Dissect a BGP ROUTE-REFRESH message.
|
|
*/
|
|
static void
|
|
dissect_bgp_route_refresh(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo)
|
|
{
|
|
int p; /* tvb offset counter */
|
|
int pend; /* end of list of entries for one orf type */
|
|
guint16 hlen; /* tvb RR msg length */
|
|
proto_item *ti; /* tree item */
|
|
proto_item *ti1; /* tree item */
|
|
proto_tree *subtree; /* tree for orf */
|
|
proto_tree *subtree1; /* tree for orf entry */
|
|
guint8 orftype; /* ORF Type */
|
|
guint16 orflen; /* ORF len */
|
|
guint8 entryflag; /* ORF Entry flag: action(add,del,delall) match(permit,deny) */
|
|
int entrylen; /* ORF Entry length */
|
|
int advance; /* tmp */
|
|
|
|
|
|
/*
|
|
example 1
|
|
00 1c 05 hlen=28
|
|
00 01 00 01 afi,safi= ipv4-unicast
|
|
02 80 00 01 defer, prefix-orf, len=1
|
|
80 removeall
|
|
example 2
|
|
00 25 05 hlen=37
|
|
00 01 00 01 afi,saif= ipv4-unicast
|
|
01 80 00 0a immediate, prefix-orf, len=10
|
|
00 add
|
|
00 00 00 05 seqno = 5
|
|
12 ge = 18
|
|
18 le = 24
|
|
10 07 02 prefix = 7.2.0.0/16
|
|
*/
|
|
if (!tree)
|
|
return;
|
|
|
|
hlen = tvb_get_ntohs(tvb, BGP_MARKER_SIZE);
|
|
p = BGP_HEADER_SIZE;
|
|
|
|
/* AFI */
|
|
proto_tree_add_item(tree, hf_bgp_route_refresh_afi, tvb, p, 2, ENC_BIG_ENDIAN);
|
|
p += 2;
|
|
|
|
/* Subtype in draft-ietf-idr-bgp-enhanced-route-refresh-02 (for Enhanced Route Refresh Capability) before Reserved*/
|
|
proto_tree_add_item(tree, hf_bgp_route_refresh_subtype, tvb, p, 1, ENC_BIG_ENDIAN);
|
|
p++;
|
|
|
|
/* SAFI */
|
|
proto_tree_add_item(tree, hf_bgp_route_refresh_safi, tvb, p, 1, ENC_BIG_ENDIAN);
|
|
p++;
|
|
|
|
if ( hlen == BGP_HEADER_SIZE + 4 )
|
|
return;
|
|
while (p < hlen) {
|
|
/* ORF type */
|
|
|
|
ti = proto_tree_add_item(tree, hf_bgp_route_refresh_orf, tvb, p, 4, ENC_NA);
|
|
subtree = proto_item_add_subtree(ti, ett_bgp_orf);
|
|
|
|
proto_tree_add_item(subtree, hf_bgp_route_refresh_orf_flag, tvb, p, 1, ENC_BIG_ENDIAN);
|
|
p += 1;
|
|
|
|
ti1 = proto_tree_add_item(subtree, hf_bgp_route_refresh_orf_type, tvb, p , 1, ENC_BIG_ENDIAN);
|
|
orftype = tvb_get_guint8(tvb, p);
|
|
p += 1;
|
|
|
|
proto_tree_add_item(subtree, hf_bgp_route_refresh_orf_length, tvb, p , 2, ENC_BIG_ENDIAN);
|
|
orflen = tvb_get_ntohs(tvb, p);
|
|
proto_item_set_len(ti, orflen + 4);
|
|
p += 2;
|
|
|
|
if (orftype != BGP_ORF_PREFIX_CISCO) {
|
|
expert_add_info_format(pinfo, ti1, &ei_bgp_route_refresh_orf_type_unknown, "ORFEntry-Unknown (type %u)", orftype);
|
|
p += orflen;
|
|
continue;
|
|
}
|
|
pend = p + orflen;
|
|
while (p < pend) {
|
|
|
|
ti1 = proto_tree_add_item(subtree, hf_bgp_route_refresh_orf_entry_prefixlist, tvb, p, 1, ENC_NA);
|
|
subtree1 = proto_item_add_subtree(ti1, ett_bgp_orf_entry);
|
|
proto_tree_add_item(subtree1, hf_bgp_route_refresh_orf_entry_action, tvb, p, 1, ENC_BIG_ENDIAN);
|
|
entryflag = tvb_get_guint8(tvb, p);
|
|
if (((entryflag & BGP_ORF_ACTION) >> 6) == BGP_ORF_REMOVEALL) {
|
|
p++;
|
|
continue;
|
|
}
|
|
proto_tree_add_item(subtree1, hf_bgp_route_refresh_orf_entry_match, tvb, p, 1, ENC_BIG_ENDIAN);
|
|
p++;
|
|
|
|
proto_tree_add_item(subtree1, hf_bgp_route_refresh_orf_entry_sequence, tvb, p, 4, ENC_BIG_ENDIAN);
|
|
p +=4;
|
|
|
|
proto_tree_add_item(subtree1, hf_bgp_route_refresh_orf_entry_prefixmask_lower, tvb, p, 1, ENC_BIG_ENDIAN);
|
|
p++;
|
|
|
|
proto_tree_add_item(subtree1, hf_bgp_route_refresh_orf_entry_prefixmask_upper, tvb, p, 1, ENC_BIG_ENDIAN);
|
|
p++;
|
|
|
|
advance = decode_prefix4(subtree1, NULL, -1, tvb, p, 0, "ORF");
|
|
if (advance < 0)
|
|
break;
|
|
entrylen = 7 + 1 + advance;
|
|
|
|
proto_item_set_len(ti1, entrylen);
|
|
p += advance;
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Dissect a BGP CAPABILITY message.
|
|
*/
|
|
static void
|
|
dissect_bgp_capability(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo)
|
|
{
|
|
int offset = 0;
|
|
int mend;
|
|
|
|
mend = offset + tvb_get_ntohs(tvb, offset + BGP_MARKER_SIZE);
|
|
offset += BGP_HEADER_SIZE;
|
|
/* step through all of the capabilities */
|
|
while (offset < mend) {
|
|
offset = dissect_bgp_capability_item(tvb, tree, pinfo, offset, TRUE);
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_bgp_pdu(tvbuff_t *volatile tvb, packet_info *pinfo, proto_tree *tree,
|
|
gboolean first)
|
|
{
|
|
guint16 bgp_len; /* Message length */
|
|
guint8 bgp_type; /* Message type */
|
|
const char *typ; /* Message type (string) */
|
|
proto_item *ti_len = NULL; /* length item */
|
|
proto_tree *bgp_tree = NULL; /* BGP packet tree */
|
|
|
|
bgp_len = tvb_get_ntohs(tvb, BGP_MARKER_SIZE);
|
|
bgp_type = tvb_get_guint8(tvb, BGP_MARKER_SIZE + 2);
|
|
typ = val_to_str(bgp_type, bgptypevals, "Unknown message type (0x%02x)");
|
|
|
|
if (first)
|
|
col_add_str(pinfo->cinfo, COL_INFO, typ);
|
|
else
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", %s", typ);
|
|
|
|
if (tree) {
|
|
proto_item *ti;
|
|
ti = proto_tree_add_item(tree, proto_bgp, tvb, 0, -1, ENC_NA);
|
|
proto_item_append_text(ti, " - %s", typ);
|
|
|
|
/* add a different tree for each message type */
|
|
switch (bgp_type) {
|
|
case BGP_OPEN:
|
|
bgp_tree = proto_item_add_subtree(ti, ett_bgp_open);
|
|
break;
|
|
case BGP_UPDATE:
|
|
bgp_tree = proto_item_add_subtree(ti, ett_bgp_update);
|
|
break;
|
|
case BGP_NOTIFICATION:
|
|
bgp_tree = proto_item_add_subtree(ti, ett_bgp_notification);
|
|
break;
|
|
case BGP_KEEPALIVE:
|
|
bgp_tree = proto_item_add_subtree(ti, ett_bgp);
|
|
break;
|
|
case BGP_ROUTE_REFRESH_CISCO:
|
|
case BGP_ROUTE_REFRESH:
|
|
bgp_tree = proto_item_add_subtree(ti, ett_bgp_route_refresh);
|
|
break;
|
|
case BGP_CAPABILITY:
|
|
bgp_tree = proto_item_add_subtree(ti, ett_bgp_capability);
|
|
break;
|
|
default:
|
|
bgp_tree = proto_item_add_subtree(ti, ett_bgp);
|
|
break;
|
|
}
|
|
|
|
proto_tree_add_item(bgp_tree, hf_bgp_marker, tvb, 0, 16, ENC_NA);
|
|
|
|
ti_len = proto_tree_add_item(bgp_tree, hf_bgp_length, tvb, 16, 2, ENC_BIG_ENDIAN);
|
|
}
|
|
|
|
if (bgp_len < BGP_HEADER_SIZE || bgp_len > BGP_MAX_PACKET_SIZE) {
|
|
expert_add_info_format(pinfo, ti_len, &ei_bgp_length_invalid, "Length is invalid %u", bgp_len);
|
|
return;
|
|
}
|
|
|
|
proto_tree_add_item(bgp_tree, hf_bgp_type, tvb, 16 + 2, 1, ENC_BIG_ENDIAN);
|
|
|
|
switch (bgp_type) {
|
|
case BGP_OPEN:
|
|
dissect_bgp_open(tvb, bgp_tree, pinfo);
|
|
break;
|
|
case BGP_UPDATE:
|
|
dissect_bgp_update(tvb, bgp_tree, pinfo);
|
|
break;
|
|
case BGP_NOTIFICATION:
|
|
dissect_bgp_notification(tvb, bgp_tree, pinfo);
|
|
break;
|
|
case BGP_KEEPALIVE:
|
|
/* no data in KEEPALIVE messages */
|
|
break;
|
|
case BGP_ROUTE_REFRESH_CISCO:
|
|
case BGP_ROUTE_REFRESH:
|
|
dissect_bgp_route_refresh(tvb, bgp_tree, pinfo);
|
|
break;
|
|
case BGP_CAPABILITY:
|
|
dissect_bgp_capability(tvb, bgp_tree, pinfo);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Dissect a BGP packet.
|
|
*/
|
|
static void
|
|
dissect_bgp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
volatile int offset = 0; /* offset into the tvbuff */
|
|
gint reported_length_remaining;
|
|
guint8 bgp_marker[BGP_MARKER_SIZE]; /* Marker (should be all ones */
|
|
static guchar marker[] = { /* BGP message marker */
|
|
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
|
|
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
|
|
};
|
|
proto_item *ti; /* tree item */
|
|
proto_tree *bgp_tree; /* BGP packet tree */
|
|
guint16 bgp_len; /* Message length */
|
|
int offset_before;
|
|
guint length_remaining;
|
|
guint length;
|
|
volatile gboolean first = TRUE; /* TRUE for the first BGP message in packet */
|
|
tvbuff_t *volatile next_tvb;
|
|
void *pd_save;
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "BGP");
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
|
|
/*
|
|
* Scan through the TCP payload looking for a BGP marker.
|
|
*/
|
|
while ((reported_length_remaining = tvb_reported_length_remaining(tvb, offset))
|
|
> 0) {
|
|
/*
|
|
* "reported_length_remaining" is the number of bytes of TCP payload
|
|
* remaining. If it's more than the length of a BGP marker,
|
|
* we check only the number of bytes in a BGP marker.
|
|
*/
|
|
if (reported_length_remaining > BGP_MARKER_SIZE)
|
|
reported_length_remaining = BGP_MARKER_SIZE;
|
|
|
|
/*
|
|
* OK, is there a BGP marker starting at the specified offset -
|
|
* or, at least, the beginning of a BGP marker running to the end
|
|
* of the TCP payload?
|
|
*
|
|
* This will throw an exception if the frame is short; that's what
|
|
* we want.
|
|
*/
|
|
tvb_memcpy(tvb, bgp_marker, offset, reported_length_remaining);
|
|
if (memcmp(bgp_marker, marker, reported_length_remaining) == 0) {
|
|
/*
|
|
* Yes - stop scanning and start processing BGP packets.
|
|
*/
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* No - keep scanning through the tvbuff to try to find a marker.
|
|
*/
|
|
offset++;
|
|
}
|
|
|
|
/*
|
|
* If we skipped any bytes, mark it as a BGP continuation.
|
|
*/
|
|
if (offset > 0) {
|
|
ti = proto_tree_add_item(tree, proto_bgp, tvb, 0, -1, ENC_NA);
|
|
bgp_tree = proto_item_add_subtree(ti, ett_bgp);
|
|
|
|
proto_tree_add_text(bgp_tree, tvb, 0, offset, "Continuation");
|
|
}
|
|
|
|
/*
|
|
* Now process the BGP packets in the TCP payload.
|
|
*
|
|
* XXX - perhaps "tcp_dissect_pdus()" should take a starting
|
|
* offset, in which case we can replace the loop below with
|
|
* a call to "tcp_dissect_pdus()".
|
|
*/
|
|
while (tvb_reported_length_remaining(tvb, offset) > 0) {
|
|
/*
|
|
* This will throw an exception if we don't have any data left.
|
|
* That's what we want. (See "tcp_dissect_pdus()", which is
|
|
* similar.)
|
|
*/
|
|
length_remaining = tvb_ensure_length_remaining(tvb, offset);
|
|
|
|
/*
|
|
* Can we do reassembly?
|
|
*/
|
|
if (bgp_desegment && pinfo->can_desegment) {
|
|
/*
|
|
* Yes - would a BGP header starting at this offset be split
|
|
* across segment boundaries?
|
|
*/
|
|
if (length_remaining < BGP_HEADER_SIZE) {
|
|
/*
|
|
* Yes. Tell the TCP dissector where the data for this message
|
|
* starts in the data it handed us and that we need "some more
|
|
* data." Don't tell it exactly how many bytes we need because
|
|
* if/when we ask for even more (after the header) that will
|
|
* break reassembly.
|
|
*/
|
|
pinfo->desegment_offset = offset;
|
|
pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT;
|
|
return;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Get the length and type from the BGP header.
|
|
*/
|
|
bgp_len = tvb_get_ntohs(tvb, offset + BGP_MARKER_SIZE);
|
|
if (bgp_len < BGP_HEADER_SIZE) {
|
|
/*
|
|
* The BGP length doesn't include the BGP header; report that
|
|
* as an error.
|
|
*/
|
|
show_reported_bounds_error(tvb, pinfo, tree);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Can we do reassembly?
|
|
*/
|
|
if (bgp_desegment && pinfo->can_desegment) {
|
|
/*
|
|
* Yes - is the PDU split across segment boundaries?
|
|
*/
|
|
if (length_remaining < bgp_len) {
|
|
/*
|
|
* Yes. Tell the TCP dissector where the data for this
|
|
* message starts in the data it handed us, and how many
|
|
* more bytes we need, and return.
|
|
*/
|
|
pinfo->desegment_offset = offset;
|
|
pinfo->desegment_len = bgp_len - length_remaining;
|
|
return;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Construct a tvbuff containing the amount of the payload we have
|
|
* available. Make its reported length the amount of data in the PDU.
|
|
*
|
|
* XXX - if reassembly isn't enabled. the subdissector will throw a
|
|
* BoundsError exception, rather than a ReportedBoundsError exception.
|
|
* We really want a tvbuff where the length is "length", the reported
|
|
* length is "plen", and the "if the snapshot length were infinite"
|
|
* length is the minimum of the reported length of the tvbuff handed
|
|
* to us and "plen", with a new type of exception thrown if the offset
|
|
* is within the reported length but beyond that third length, with
|
|
* that exception getting the "Unreassembled Packet" error.
|
|
*/
|
|
length = length_remaining;
|
|
if (length > bgp_len)
|
|
length = bgp_len;
|
|
next_tvb = tvb_new_subset(tvb, offset, length, bgp_len);
|
|
|
|
/*
|
|
* Dissect the PDU.
|
|
*
|
|
* If it gets an error that means there's no point in
|
|
* dissecting any more PDUs, rethrow the exception in
|
|
* question.
|
|
*
|
|
* If it gets any other error, report it and continue, as that
|
|
* means that PDU got an error, but that doesn't mean we should
|
|
* stop dissecting PDUs within this frame or chunk of reassembled
|
|
* data.
|
|
*/
|
|
pd_save = pinfo->private_data;
|
|
TRY {
|
|
dissect_bgp_pdu(next_tvb, pinfo, tree, first);
|
|
}
|
|
CATCH_NONFATAL_ERRORS {
|
|
/* Restore the private_data structure in case one of the
|
|
* called dissectors modified it (and, due to the exception,
|
|
* was unable to restore it).
|
|
*/
|
|
pinfo->private_data = pd_save;
|
|
show_exception(tvb, pinfo, tree, EXCEPT_CODE, GET_MESSAGE);
|
|
}
|
|
ENDTRY;
|
|
|
|
first = FALSE;
|
|
|
|
/*
|
|
* Step to the next PDU.
|
|
* Make sure we don't overflow.
|
|
*/
|
|
offset_before = offset;
|
|
offset += bgp_len;
|
|
if (offset <= offset_before)
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Register ourselves.
|
|
*/
|
|
void
|
|
proto_register_bgp(void)
|
|
{
|
|
|
|
static hf_register_info hf[] = {
|
|
/* BGP Header */
|
|
{ &hf_bgp_marker,
|
|
{ "Marker", "bgp.marker", FT_BYTES, BASE_NONE,
|
|
NULL, 0x0, "Must be set to all ones (16 Bytes)", HFILL }},
|
|
{ &hf_bgp_length,
|
|
{ "Length", "bgp.length", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, "The total length of the message, including the header in octets", HFILL }},
|
|
{ &hf_bgp_type,
|
|
{ "Type", "bgp.type", FT_UINT8, BASE_DEC,
|
|
VALS(bgptypevals), 0x0, "BGP message type", HFILL }},
|
|
/* Open Message */
|
|
{ &hf_bgp_open_version,
|
|
{ "Version", "bgp.open.version", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "The protocol version number", HFILL }},
|
|
{ &hf_bgp_open_myas,
|
|
{ "My AS", "bgp.open.myas", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, "The Autonomous System number of the sender", HFILL }},
|
|
{ &hf_bgp_open_holdtime,
|
|
{ "Hold Time", "bgp.open.holdtime", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, "The number of seconds the sender proposes for Hold Time", HFILL }},
|
|
{ &hf_bgp_open_identifier,
|
|
{ "BGP Identifier", "bgp.open.identifier", FT_IPv4, BASE_NONE,
|
|
NULL, 0x0, "The BGP Identifier of the sender", HFILL }},
|
|
{ &hf_bgp_open_opt_len,
|
|
{ "Optional Parameters Length", "bgp.open.opt.len", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "The total length of the Optional Parameters field in octets", HFILL }},
|
|
{ &hf_bgp_open_opt_params,
|
|
{ "Optional Parameters", "bgp.open.opt", FT_NONE, BASE_NONE,
|
|
NULL, 0x0, "List of optional parameters", HFILL }},
|
|
{ &hf_bgp_open_opt_param,
|
|
{ "Optional Parameter", "bgp.open.opt.param", FT_NONE, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_open_opt_param_type,
|
|
{ "Parameter Type", "bgp.open.opt.param.type", FT_UINT8, BASE_DEC,
|
|
VALS(bgp_open_opt_vals), 0x0, "Unambiguously identifies individual parameters", HFILL }},
|
|
{ &hf_bgp_open_opt_param_len,
|
|
{ "Parameter Length", "bgp.open.opt.param.len", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "Length of the Parameter Value", HFILL }},
|
|
{ &hf_bgp_open_opt_param_auth,
|
|
{ "Authentication Data", "bgp.open.opt.param.auth", FT_BYTES, BASE_NONE,
|
|
NULL, 0x0, "Deprecated", HFILL }},
|
|
{ &hf_bgp_open_opt_param_unknown,
|
|
{ "Unknown", "bgp.open.opt.param.unknown", FT_BYTES, BASE_NONE,
|
|
NULL, 0x0, "Unknown Parameter", HFILL }},
|
|
/* Notification error */
|
|
{ &hf_bgp_notify_major_error,
|
|
{ "Major error Code", "bgp.notify.major_error", FT_UINT8, BASE_DEC,
|
|
VALS(bgpnotify_major), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_notify_minor_msg_hdr,
|
|
{ "Minor error Code (Message Header)", "bgp.notify.minor_error", FT_UINT8, BASE_DEC,
|
|
VALS(bgpnotify_minor_msg_hdr), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_notify_minor_open_msg,
|
|
{ "Minor error Code (Open Message)", "bgp.notify.minor_error_open", FT_UINT8, BASE_DEC,
|
|
VALS(bgpnotify_minor_open_msg), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_notify_minor_update_msg,
|
|
{ "Minor error Code (Update Message)", "bgp.notify.minor_error_update", FT_UINT8, BASE_DEC,
|
|
VALS(bgpnotify_minor_update_msg), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_notify_minor_ht_expired,
|
|
{ "Minor error Code (Hold Timer Expired)", "bgp.notify.minor_error_expired", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_notify_minor_state_machine,
|
|
{ "Minor error Code (State Machine)", "bgp.notify.minor_error_state", FT_UINT8, BASE_DEC,
|
|
VALS(bgpnotify_minor_state_machine), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_notify_minor_cease,
|
|
{ "Minor error Code (Cease)", "bgp.notify.minor_error_cease", FT_UINT8, BASE_DEC,
|
|
VALS(bgpnotify_minor_cease), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_notify_minor_cap_msg,
|
|
{ "Minor error Code (Capability Message)", "bgp.notify.minor_error_capability", FT_UINT8, BASE_DEC,
|
|
VALS(bgpnotify_minor_cap_msg), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_notify_minor_unknown,
|
|
{ "Minor error Code (Unknown)", "bgp.notify.minor_error_unknown", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_notify_data,
|
|
{ "Data", "bgp.notify.minor_data", FT_BYTES, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
|
|
/* Route Refresh */
|
|
{ &hf_bgp_route_refresh_afi,
|
|
{ "Address family identifier (AFI)", "bgp.route_refresh.afi", FT_UINT16, BASE_DEC,
|
|
VALS(afn_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_route_refresh_subtype,
|
|
{ "Subtype", "bgp.route_refresh.subtype", FT_UINT8, BASE_DEC,
|
|
VALS(route_refresh_subtype_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_route_refresh_safi,
|
|
{ "Subsequent address family identifier (SAFI)", "bgp.route_refresh.safi", FT_UINT8, BASE_DEC,
|
|
VALS(bgpattr_nlri_safi), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_route_refresh_orf,
|
|
{ "ORF information", "bgp.route_refresh.orf", FT_NONE, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_route_refresh_orf_flag,
|
|
{ "ORF flag", "bgp.route_refresh.orf.flag", FT_UINT8, BASE_DEC,
|
|
VALS(orf_when_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_route_refresh_orf_type,
|
|
{ "ORF type", "bgp.route_refresh.orf.type", FT_UINT8, BASE_DEC,
|
|
VALS(orf_type_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_route_refresh_orf_length,
|
|
{ "ORF length", "bgp.route_refresh.orf.length", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_route_refresh_orf_entry_prefixlist,
|
|
{ "ORFEntry PrefixList", "bgp.route_refresh.orf.entry", FT_NONE, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_route_refresh_orf_entry_action,
|
|
{ "ORFEntry Action", "bgp.route_refresh.orf.entry.action", FT_UINT8, BASE_DEC,
|
|
VALS(orf_entry_action_vals), BGP_ORF_ACTION, NULL, HFILL }},
|
|
{ &hf_bgp_route_refresh_orf_entry_match,
|
|
{ "ORFEntry Match", "bgp.route_refresh.orf.entry.match", FT_UINT8, BASE_DEC,
|
|
VALS(orf_entry_match_vals), BGP_ORF_MATCH, NULL, HFILL }},
|
|
{ &hf_bgp_route_refresh_orf_entry_sequence,
|
|
{ "ORFEntry Sequence", "bgp.route_refresh.orf.entry.sequence", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_route_refresh_orf_entry_prefixmask_lower,
|
|
{ "ORFEntry PrefixMask length lower bound", "bgp.route_refresh.orf.entry.prefixmask_lower", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_route_refresh_orf_entry_prefixmask_upper,
|
|
{ "ORFEntry PrefixMask length upper bound", "bgp.route_refresh.orf.entry.prefixmask_upper", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
|
|
/* Capability */
|
|
{ &hf_bgp_cap,
|
|
{ "Capability", "bgp.cap", FT_NONE, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_cap_type,
|
|
{ "Type", "bgp.cap.type", FT_UINT8, BASE_DEC,
|
|
VALS(capability_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_cap_length,
|
|
{ "Length", "bgp.cap.length", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_cap_action,
|
|
{ "Action", "bgp.cap.action", FT_UINT8, BASE_DEC,
|
|
VALS(bgpcap_action), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_cap_unknown,
|
|
{ "Unknown", "bgp.cap.unknown", FT_BYTES, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_cap_reserved,
|
|
{ "Reserved", "bgp.cap.reserved", FT_BYTES, BASE_NONE,
|
|
NULL, 0x0, "Must be Zero", HFILL }},
|
|
{ &hf_bgp_cap_mp_afi,
|
|
{ "AFI", "bgp.cap.mp.afi", FT_UINT16, BASE_DEC,
|
|
VALS(afn_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_cap_mp_safi,
|
|
{ "SAFI", "bgp.cap.mp.safi", FT_UINT8, BASE_DEC,
|
|
VALS(bgpattr_nlri_safi), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_cap_gr_timers,
|
|
{ "Restart Timers", "bgp.cap.gr.timers", FT_UINT16, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_cap_gr_timers_restart_flag,
|
|
{ "Restart", "bgp.cap.gr.timers.restart_flag", FT_BOOLEAN, 16,
|
|
TFS(&tfs_yes_no), 0x8000, NULL, HFILL }},
|
|
{ &hf_bgp_cap_gr_timers_restart_time,
|
|
{ "Time", "bgp.cap.gr.timers.restart_time", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0FFF, "in us", HFILL }},
|
|
{ &hf_bgp_cap_gr_afi,
|
|
{ "AFI", "bgp.cap.gr.afi", FT_UINT16, BASE_DEC,
|
|
VALS(afn_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_cap_gr_safi,
|
|
{ "SAFI", "bgp.cap.gr.safi", FT_UINT8, BASE_DEC,
|
|
VALS(bgpattr_nlri_safi), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_cap_gr_flag,
|
|
{ "Flag", "bgp.cap.gr.flag", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_cap_gr_flag_pfs,
|
|
{ "Preserve forwarding state", "bgp.cap.gr.flag.pfs", FT_BOOLEAN, 8,
|
|
TFS(&tfs_yes_no), 0x80, NULL, HFILL }},
|
|
{ &hf_bgp_cap_4as,
|
|
{ "AS Number", "bgp.cap.4as", FT_UINT32, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_cap_dc,
|
|
{ "Capability Dynamic", "bgp.cap.dc", FT_UINT8, BASE_DEC,
|
|
VALS(capability_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_cap_ap_afi,
|
|
{ "AFI", "bgp.cap.ap.afi", FT_UINT16, BASE_DEC,
|
|
VALS(afn_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_cap_ap_safi,
|
|
{ "SAFI", "bgp.cap.ap.safi", FT_UINT8, BASE_DEC,
|
|
VALS(bgpattr_nlri_safi), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_cap_ap_sendreceive,
|
|
{ "Send/Receive", "bgp.cap.ap.sendreceive", FT_UINT8, BASE_DEC,
|
|
VALS(orf_send_recv_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_cap_orf_afi,
|
|
{ "AFI", "bgp.cap.orf.afi", FT_UINT16, BASE_DEC,
|
|
VALS(afn_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_cap_orf_safi,
|
|
{ "SAFI", "bgp.cap.orf.safi", FT_UINT8, BASE_DEC,
|
|
VALS(bgpattr_nlri_safi), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_cap_orf_number,
|
|
{ "Number", "bgp.cap.orf.number", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_cap_orf_type,
|
|
{ "Type", "bgp.cap.orf.type", FT_UINT8, BASE_DEC,
|
|
VALS(orf_type_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_cap_orf_sendreceive,
|
|
{ "Send Receive", "bgp.cap.orf.sendreceive", FT_UINT8, BASE_DEC,
|
|
VALS(orf_send_recv_vals), 0x0, NULL, HFILL }},
|
|
/* BGP update */
|
|
|
|
{ &hf_bgp_update_withdrawn_routes_length,
|
|
{ "Withdrawn Routes Length", "bgp.update.withdrawn_routes.length", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_withdrawn_routes,
|
|
{ "Withdrawn Routes", "bgp.update.withdrawn_routes.length", FT_NONE, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
|
|
{ &hf_bgp_update_path_attribute_aggregator_as,
|
|
{ "Aggregator AS", "bgp.update.path_attribute.aggregator_as", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
/* BGP update path attributes */
|
|
{ &hf_bgp_update_path_attributes,
|
|
{ "Path attributes", "bgp.update.path_attributes", FT_NONE, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_total_path_attribute_length,
|
|
{ "Total Path Attribute Length", "bgp.update.path_attributes.length", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_path_attribute_aggregator_origin,
|
|
{ "Aggregator origin", "bgp.update.path_attribute.aggregator_origin", FT_IPv4, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_path_attribute_as_path_segment,
|
|
{ "AS Path segment", "bgp.update.path_attribute.as_path_segment", FT_NONE, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_path_attribute_as_path_segment_type,
|
|
{ "Segment type", "bgp.update.path_attribute.as_path_segment.type", FT_UINT8, BASE_DEC,
|
|
VALS(as_segment_type), 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_path_attribute_as_path_segment_length,
|
|
{ "Segment length (number of ASN)", "bgp.update.path_attribute.as_path_segment.length", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_path_attribute_as_path_segment_as2,
|
|
{ "AS2", "bgp.update.path_attribute.as_path_segment.as2", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_path_attribute_as_path_segment_as4,
|
|
{ "AS4", "bgp.update.path_attribute.as_path_segment.as4", FT_UINT32, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_path_attribute_communities,
|
|
{ "Communities", "bgp.update.path_attribute.communities", FT_NONE, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_path_attribute_community,
|
|
{ "Community", "bgp.update.path_attribute.community", FT_NONE, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_path_attribute_community_well_known,
|
|
{ "Community Well-known", "bgp.update.path_attribute.community_wellknown", FT_UINT32, BASE_HEX,
|
|
VALS(community_vals), 0x0, "Reserved", HFILL}},
|
|
{ &hf_bgp_update_path_attribute_community_as,
|
|
{ "Community AS", "bgp.update.path_attribute.community_as", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_path_attribute_community_value,
|
|
{ "Community value", "bgp.update.path_attribute.community_value", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_path_attribute_local_pref,
|
|
{ "Local preference", "bgp.update.path_attribute.local_pref", FT_UINT32, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_path_attribute_multi_exit_disc,
|
|
{ "Multiple exit discriminator", "bgp.update.path_attribute.multi_exit_disc", FT_UINT32, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_path_attribute_next_hop,
|
|
{ "Next hop", "bgp.update.path_attribute.next_hop", FT_IPv4, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_path_attribute_origin,
|
|
{ "Origin", "bgp.update.path_attribute.origin", FT_UINT8, BASE_DEC,
|
|
VALS(bgpattr_origin), 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_path_attribute,
|
|
{ "Path Attribut", "bgp.update.path_attribute", FT_NONE, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_path_attribute_flags,
|
|
{ "Flags", "bgp.update.path_attribute.flags", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_path_attribute_flags_optional,
|
|
{ "Optional", "bgp.update.path_attribute.flags.optional", FT_BOOLEAN, 8,
|
|
TFS(&tfs_optional_wellknown), BGP_ATTR_FLAG_OPTIONAL, NULL, HFILL}},
|
|
{ &hf_bgp_update_path_attribute_flags_transitive,
|
|
{ "Transitive", "bgp.update.path_attribute.flags.transitive", FT_BOOLEAN, 8,
|
|
TFS(&tfs_transitive_non_transitive), BGP_ATTR_FLAG_TRANSITIVE, NULL, HFILL}},
|
|
{ &hf_bgp_update_path_attribute_flags_partial,
|
|
{ "Partial", "bgp.update.path_attribute.flags.partial", FT_BOOLEAN, 8,
|
|
TFS(&tfs_partial_complete), BGP_ATTR_FLAG_PARTIAL, NULL, HFILL}},
|
|
{ &hf_bgp_update_path_attribute_flags_extended_length,
|
|
{ "Length", "bgp.update.path_attribute.flags.extended_length", FT_BOOLEAN, 8,
|
|
TFS(&tfs_extended_regular_length), BGP_ATTR_FLAG_EXTENDED_LENGTH, NULL, HFILL}},
|
|
{ &hf_bgp_update_path_attribute_type_code,
|
|
{ "Type Code", "bgp.update.path_attribute.type_code", FT_UINT8, BASE_DEC,
|
|
VALS(bgpattr_type), 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_path_attribute_length,
|
|
{ "Length", "bgp.update.path_attribute.length", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_path_attribute_link_state,
|
|
{ "Link State", "bgp.update.path_attribute.link_state", FT_NONE, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
|
|
/* RFC4456 */
|
|
{ &hf_bgp_update_path_attribute_originator_id,
|
|
{ "Originator identifier", "bgp.update.path_attribute.originator_id", FT_IPv4, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_path_attribute_cluster_list,
|
|
{ "Cluster List", "bgp.path_attribute.cluster_list", FT_BYTES, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
|
|
/* RFC5512 : BGP Encapsulation SAFI and the BGP Tunnel Encapsulation Attribute */
|
|
{ &hf_bgp_update_encaps_tunnel_tlv_len,
|
|
{ "length", "bgp.update.encaps_tunnel_tlv_len", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_encaps_tunnel_tlv_type,
|
|
{ "Type code", "bgp.update.encaps_tunnel_tlv_type", FT_UINT16, BASE_DEC,
|
|
VALS(tunnel_type), 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_encaps_tunnel_subtlv_len,
|
|
{ "length", "bgp.update.encaps_tunnel_tlv_sublen", FT_UINT8,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_update_encaps_tunnel_subtlv_type,
|
|
{ "Type code", "bgp.update.encaps_tunnel_subtlv_type", FT_UINT8, BASE_DEC,
|
|
VALS(subtlv_type), 0x0, NULL, HFILL}},
|
|
|
|
/* BGP update path attribut SSA SAFI (deprecated IETF draft) */
|
|
{ &hf_bgp_ssa_t,
|
|
{ "Transitive bit", "bgp.ssa_t", FT_BOOLEAN, 8,
|
|
NULL, 0x80, "SSA Transitive bit", HFILL}},
|
|
{ &hf_bgp_ssa_type,
|
|
{ "SSA Type", "bgp.ssa_type", FT_UINT16, BASE_DEC,
|
|
VALS(bgp_ssa_type), 0x7FFF, NULL, HFILL}},
|
|
{ &hf_bgp_ssa_len,
|
|
{ "Length", "bgp.ssa_len", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, "SSA Length", HFILL}},
|
|
{ &hf_bgp_ssa_value,
|
|
{ "Value", "bgp.ssa_value", FT_BYTES, BASE_NONE,
|
|
NULL, 0x0, "SSA Value", HFILL}},
|
|
{ &hf_bgp_ssa_l2tpv3_pref,
|
|
{ "Preference", "bgp.ssa_l2tpv3_pref", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ssa_l2tpv3_s,
|
|
{ "Sequencing bit", "bgp.ssa_l2tpv3_s", FT_BOOLEAN, 8,
|
|
NULL, 0x80, "Sequencing S-bit", HFILL}},
|
|
{ &hf_bgp_ssa_l2tpv3_unused,
|
|
{ "Unused", "bgp.ssa_l2tpv3_Unused", FT_BOOLEAN, 8,
|
|
NULL, 0x7F, "Unused Flags", HFILL}},
|
|
{ &hf_bgp_ssa_l2tpv3_cookie_len,
|
|
{ "Cookie Length", "bgp.ssa_l2tpv3_cookie_len", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ssa_l2tpv3_session_id,
|
|
{ "Session ID", "bgp.ssa_l2tpv3_session_id", FT_UINT32, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ssa_l2tpv3_cookie,
|
|
{ "Cookie", "bgp.ssa_l2tpv3_cookie", FT_BYTES, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_withdrawn_prefix,
|
|
{ "Withdrawn prefix", "bgp.withdrawn_prefix", FT_IPv4, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
|
|
/* NLRI header description */
|
|
{ &hf_bgp_update_nlri,
|
|
{ "Network Layer Reachability Information (NLRI)", "bgp.update.nlri", FT_NONE, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
/* Global NLRI description */
|
|
{ &hf_bgp_mp_reach_nlri_ipv4_prefix,
|
|
{ "MP Reach NLRI IPv4 prefix", "bgp.mp_reach_nlri_ipv4_prefix", FT_IPv4, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_mp_unreach_nlri_ipv4_prefix,
|
|
{ "MP Unreach NLRI IPv4 prefix", "bgp.mp_unreach_nlri_ipv4_prefix", FT_IPv4, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_mp_nlri_tnl_id,
|
|
{ "MP Reach NLRI Tunnel Identifier", "bgp.mp_nlri_tnl_id", FT_UINT16, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_nlri_prefix,
|
|
{ "NLRI prefix", "bgp.nlri_prefix", FT_IPv4, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_nlri_path_id,
|
|
{ "NLRI path id", "bgp.nlri_path_id", FT_UINT32, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
|
|
/* mcast vpn nlri and capability */
|
|
{ &hf_bgp_mcast_vpn_nlri_t,
|
|
{ "MCAST-VPN nlri", "bgp.mcast_vpn_nlri", FT_BYTES, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_mcast_vpn_nlri_route_type,
|
|
{ "Route Type", "bgp.mcast_vpn_nlri_route_type", FT_UINT8,
|
|
BASE_DEC, VALS(mcast_vpn_route_type), 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_mcast_vpn_nlri_length,
|
|
{ "Length", "bgp.mcast_vpn_nlri_length", FT_UINT8,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_mcast_vpn_nlri_rd,
|
|
{ "Route Distinguisher", "bgp.mcast_vpn_nlri_rd", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_mcast_vpn_nlri_origin_router_ipv4,
|
|
{ "Originating Router", "bgp.mcast_vpn_nlri_origin_router_ipv4", FT_IPv4,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_mcast_vpn_nlri_origin_router_ipv6,
|
|
{ "Originating Router", "bgp.mcast_vpn_nlri_origin_router_ipv6", FT_IPv6,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_mcast_vpn_nlri_source_as,
|
|
{ "Source AS", "bgp.mcast_vpn_nlri_source_as", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_mcast_vpn_nlri_source_length,
|
|
{ "Multicast Source Length", "bgp.mcast_vpn_nlri_source_length", FT_UINT8,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_mcast_vpn_nlri_group_length,
|
|
{ "Multicast Group Length", "bgp.mcast_vpn_nlri_group_length", FT_UINT8,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_mcast_vpn_nlri_source_addr_ipv4,
|
|
{ "Multicast Source Address", "bgp.mcast_vpn_nlri_source_addr_ipv4", FT_IPv4,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_mcast_vpn_nlri_source_addr_ipv6,
|
|
{ "Multicast Source Address", "bgp.mcast_vpn_nlri_source_addr_ipv6", FT_IPv6,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_mcast_vpn_nlri_group_addr_ipv4,
|
|
{ "Multicast Group Address", "bgp.mcast_vpn_nlri_group_addr_ipv4", FT_IPv4,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_mcast_vpn_nlri_group_addr_ipv6,
|
|
{ "Group Address", "bgp.mcast_vpn_nlri_group_addr_ipv6", FT_IPv6,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_mcast_vpn_nlri_route_key,
|
|
{ "Route Key", "bgp.mcast_vpn_nlri_route_key", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
/* Bgp flow spec nlri and capability */
|
|
{ &hf_bgp_flowspec_nlri_t,
|
|
{ "FLOW-SPEC nlri", "bgp.flowspec_nlri", FT_BYTES, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_flowspec_nlri_filter,
|
|
{ "Filter", "bgp.flowspec_nlri.filter", FT_NONE, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_filter_type,
|
|
{ "Filter type", "bgp.flowspec_nlri.filter_type", FT_UINT8, BASE_DEC,
|
|
VALS(flowspec_nlri_opvaluepair_type), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_length,
|
|
{ "NRLI length", "bgp.flowspec_nlri.length", FT_UINT32, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_op_flags,
|
|
{ "Operator flags", "bgp.flowspec_nlri.opflags", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_dst_pref_ipv4,
|
|
{ "Destination IP filter", "bgp.flowspec_nlri.dst_prefix_filter", FT_IPv4,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_flowspec_nlri_src_pref_ipv4,
|
|
{ "Source IP filter", "bgp.flowspec_nlri.src_prefix_filter", FT_IPv4,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_flowspec_nlri_op_eol,
|
|
{ "end-of-list", "bgp.flowspec_nlri.op.eol", FT_BOOLEAN, 8, TFS(&tfs_set_notset), BGPNLRI_FSPEC_END_OF_LST,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_op_and,
|
|
{ "and", "bgp.flowspec_nlri.op.and", FT_BOOLEAN, 8, TFS(&tfs_set_notset), BGPNLRI_FSPEC_AND_BIT,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_op_val_len,
|
|
{ "Value length", "bgp.flowspec_nlri.op.val_len", FT_UINT8, BASE_DEC, &flow_spec_op_len_val, BGPNLRI_FSPEC_VAL_LEN,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_op_un_bit4,
|
|
{ "Reserved", "bgp.flowspec_nlri.op.un_bit4", FT_BOOLEAN, 8, TFS(&tfs_set_notset), BGPNLRI_FSPEC_UNUSED_BIT4,
|
|
"Unused (must be zero)",HFILL}},
|
|
{ &hf_bgp_flowspec_nlri_op_un_bit5,
|
|
{ "Reserved", "bgp.flowspec_nlri.op.un_bit5", FT_BOOLEAN, 8, TFS(&tfs_set_notset), BGPNLRI_FSPEC_UNUSED_BIT5,
|
|
"Unused (must be zero)", HFILL}},
|
|
{ &hf_bgp_flowspec_nlri_dec_val_8,
|
|
{ "Decimal value", "bgp.flowspec_nlri.dec_val_8", FT_UINT8, BASE_DEC, NULL, 0X0,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_dec_val_16,
|
|
{ "Decimal value", "bgp.flowspec_nlri.dec_val_16", FT_UINT16, BASE_DEC, NULL, 0X0,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_dec_val_32,
|
|
{ "Decimal value", "bgp.flowspec_nlri.dec_val_32", FT_UINT32, BASE_DEC, NULL, 0X0,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_dec_val_64,
|
|
{ "Decimal value", "bgp.flowspec_nlri.dec_val_64", FT_UINT64, BASE_DEC, NULL, 0X0,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_op_lt,
|
|
{ "less than", "bgp.flowspec_nlri.op.lt", FT_BOOLEAN, 8, TFS(&tfs_set_notset), BGPNLRI_FSPEC_LESS_THAN,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_op_gt,
|
|
{ "greater than", "bgp.flowspec_nlri.op.gt", FT_BOOLEAN, 8, TFS(&tfs_set_notset), BGPNLRI_FSPEC_GREATER_THAN,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_op_eq,
|
|
{ "equal", "bgp.flowspec_nlri.op.equal", FT_BOOLEAN, 8, TFS(&tfs_set_notset), BGPNLRI_FSPEC_EQUAL,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_op_flg_not,
|
|
{ "logical negation", "bgp.flowspec_nlri.op.flg_not", FT_BOOLEAN, 8, TFS(&tfs_set_notset), BGPNLRI_FSPEC_TCPF_NOTBIT,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_op_flg_match,
|
|
{ "Match bit", "bgp.flowspec_nlri.op.flg_match", FT_BOOLEAN, 8, TFS(&tfs_set_notset), BGPNLRI_FSPEC_TCPF_MATCHBIT,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_tcp_flags,
|
|
{ "TCP flags", "bgp.flowspec_nlri.val_tcp.flags", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_tcp_flags_cwr,
|
|
{ "Congestion Window Reduced (CWR)", "bgp.flowspec_nlri.val_tcp.flags.cwr", FT_BOOLEAN, 8, TFS(&tfs_set_notset), BGPNLRI_FSPEC_TH_CWR,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_tcp_flags_ecn,
|
|
{ "ECN-Echo", "bgp.flowspec_nlri.val_tcp.flags.ecn", FT_BOOLEAN, 8, TFS(&tfs_set_notset), BGPNLRI_FSPEC_TH_ECN,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_tcp_flags_urg,
|
|
{ "Urgent", "bgp.flowspec_nlri.val_tcp.flags.urg", FT_BOOLEAN, 8, TFS(&tfs_set_notset), BGPNLRI_FSPEC_TH_URG,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_tcp_flags_ack,
|
|
{ "Acknowledgment", "bgp.flowspec_nlri.val_tcp.flags.ack", FT_BOOLEAN, 8, TFS(&tfs_set_notset), BGPNLRI_FSPEC_TH_ACK,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_tcp_flags_push,
|
|
{ "Push", "bgp.flowspec_nlri.val_tcp.flags.push", FT_BOOLEAN, 8, TFS(&tfs_set_notset), BGPNLRI_FSPEC_TH_PUSH,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_tcp_flags_reset,
|
|
{ "Reset", "bgp.flowspec_nlri.val_tcp.flags.reset", FT_BOOLEAN, 8, TFS(&tfs_set_notset), BGPNLRI_FSPEC_TH_RST,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_tcp_flags_syn,
|
|
{ "Syn", "bgp.flowspec_nlri.val_tcp.flags.syn", FT_BOOLEAN, 8, TFS(&tfs_set_notset), BGPNLRI_FSPEC_TH_SYN,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_tcp_flags_fin,
|
|
{ "Fin", "bgp.flowspec_nlri.val_tcp.flags.fin", FT_BOOLEAN, 8, TFS(&tfs_set_notset), BGPNLRI_FSPEC_TH_FIN,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_fflag,
|
|
{ "Fragment Flag", "bgp.flowspec_nlri.val_frag", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_fflag_lf,
|
|
{ "Last fragment", "bgp.flowspec_nlri.val_frag_lf", FT_BOOLEAN, 8, TFS(&tfs_set_notset), BGPNLRI_FSPEC_FG_LF,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_fflag_ff,
|
|
{ "First fragment", "bgp.flowspec_nlri.val_frag_ff", FT_BOOLEAN, 8, TFS(&tfs_set_notset), BGPNLRI_FSPEC_FG_FF,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_fflag_isf,
|
|
{ "Is a fragment", "bgp.flowspec_nlri.val_frag_isf", FT_BOOLEAN, 8, TFS(&tfs_set_notset), BGPNLRI_FSPEC_FG_ISF,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_fflag_df,
|
|
{ "Don't fragment", "bgp.flowspec_nlri.val_frag_df", FT_BOOLEAN, 8, TFS(&tfs_set_notset), BGPNLRI_FSPEC_FG_DF,
|
|
NULL, HFILL }},
|
|
{ &hf_bgp_flowspec_nlri_dscp,
|
|
{ "Differentiated Services Codepoint", "bgp.flowspec_nlri.val_dsfield", FT_UINT8, BASE_HEX | BASE_EXT_STRING,
|
|
&dscp_vals_ext, BGPNLRI_FSPEC_DSCP_BITMASK, NULL, HFILL }},
|
|
/* end of bgp flow spec */
|
|
/* BGP update safi ndt nlri draft-nalawade-idr-mdt-safi-03 */
|
|
{ &hf_bgp_mdt_nlri_safi_rd,
|
|
{ "Route Distinguisher", "bgp.mdt_safi_rd", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_mdt_nlri_safi_ipv4_addr,
|
|
{ "IPv4 Address", "bgp.mdt_safi_ipv4_addr", FT_IPv4,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_mdt_nlri_safi_group_addr,
|
|
{ "Group Address", "bgp.mdt_safi_group_addr", FT_IPv4,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
/* BGP update extended community header field */
|
|
/* BGP update extended community flow spec RFC 5575 */
|
|
{ &hf_bgp_ext_com_flow_act_samp_act,
|
|
{ "Sample", "bgp.ext_com_flow.sample", FT_BOOLEAN, 8, TFS(&tfs_set_notset),
|
|
BGP_EXT_COM_FSPEC_ACT_S, NULL, HFILL}},
|
|
{ &hf_bgp_ext_com_flow_act_term_act,
|
|
{ "Terminal action", "bgp.ext_com_flow.traff_act", FT_BOOLEAN, 8, TFS(&tfs_set_notset),BGP_EXT_COM_FSPEC_ACT_T,NULL, HFILL}},
|
|
{ &hf_bgp_ext_com_flow_rate_float,
|
|
{ "Rate shaper", "bgp.ext_com_flow.rate_limit", FT_FLOAT, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ext_com_flow_act_allset,
|
|
{ "5 Bytes", "bgp.flowspec_ext_com.emptybytes", FT_BYTES, BASE_NONE,
|
|
NULL, 0x0, "Must be set to all 0", HFILL }},
|
|
{ &hf_bgp_ext_com_flow_redir,
|
|
{ "Action Traffic redirect", "bgp.ext_com_flow.redirect", FT_NONE, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_ext_com_flow_redir_as,
|
|
{ "AS", "bgp.ext_com_flow.redirect.as16", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_ext_com_flow_redir_an,
|
|
{ "AN", "bgp.ext_com_flow.redirect.an32", FT_UINT32, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
|
|
/* BGP QoS propagation draft-knoll-idr-qos-attribute */
|
|
{ &hf_bgp_ext_com_qos_flags,
|
|
{ "Flags", "bgp.ext_com_qos.flags", FT_UINT8, BASE_HEX,
|
|
NULL, 0, NULL, HFILL}},
|
|
{ &hf_bgp_ext_com_qos_flags_remarking,
|
|
{ "Remarking", "bgp.ext_com_qos.flags.remarking", FT_BOOLEAN, 8,
|
|
TFS(&tfs_yes_no), 0x10, NULL, HFILL}},
|
|
{ &hf_bgp_ext_com_qos_flags_ignore_remarking,
|
|
{ "Ignore remarking", "bgp.ext_com_qos.flags.ignore_remarking", FT_BOOLEAN, 8,
|
|
TFS(&tfs_yes_no), 0x08, NULL, HFILL}},
|
|
{ &hf_bgp_ext_com_qos_flags_agg_marking,
|
|
{ "Aggegation of markins", "bgp.ext_com_qos.flags.agg_marking", FT_BOOLEAN, 8,
|
|
TFS(&tfs_yes_no), 0x04, NULL, HFILL}},
|
|
{ &hf_bgp_ext_com_cos_flags,
|
|
{ "Flags byte 1", "bgp.ext_com_cos.flags", FT_UINT8, BASE_HEX,
|
|
NULL, 0, NULL, HFILL}},
|
|
{ &hf_bgp_ext_com_cos_flags_be,
|
|
{ "BE class", "bgp.ext_com_cos.flags.be", FT_BOOLEAN, 8,
|
|
TFS(&tfs_supported_not_supported), 0x80, NULL, HFILL}},
|
|
{ &hf_bgp_ext_com_cos_flags_ef,
|
|
{ "EF class", "bgp.ext_com_cos.flags.ef", FT_BOOLEAN, 8,
|
|
TFS(&tfs_supported_not_supported), 0x40, NULL, HFILL}},
|
|
{ &hf_bgp_ext_com_cos_flags_af,
|
|
{ "AF class", "bgp.ext_com_cos.flags.af", FT_BOOLEAN, 8,
|
|
TFS(&tfs_supported_not_supported), 0x20, NULL, HFILL}},
|
|
{ &hf_bgp_ext_com_cos_flags_le,
|
|
{ "LE class", "bgp.ext_com_cos.flags.le", FT_BOOLEAN, 8,
|
|
TFS(&tfs_supported_not_supported), 0x10, NULL, HFILL}},
|
|
{ &hf_bgp_ext_com_qos_set_number,
|
|
{ "QoS Set Number", "bgp.ext_com_qos.set_number", FT_UINT8, BASE_HEX,
|
|
NULL, 0, NULL, HFILL}},
|
|
{ &hf_bgp_ext_com_qos_tech_type,
|
|
{ "Technology Type", "bgp.ext_com_qos.tech_type", FT_UINT8, BASE_HEX,
|
|
VALS(qos_tech_type), 0, NULL, HFILL}},
|
|
{ &hf_bgp_ext_com_qos_marking_o,
|
|
{ "QoS Marking O", "bgp.ext_com_qos.marking_o", FT_UINT16, BASE_HEX,
|
|
NULL, 0, NULL, HFILL}},
|
|
{ &hf_bgp_ext_com_qos_marking_a,
|
|
{ "QoS Marking A", "bgp.ext_com_qos.marking_a", FT_UINT8, BASE_HEX_DEC,
|
|
NULL, 0, NULL, HFILL}},
|
|
{ &hf_bgp_ext_com_qos_default_to_zero,
|
|
{ "Defaults to zero", "bgp.ext_com_qos.default_to_zero", FT_UINT8, BASE_HEX,
|
|
NULL, 0, NULL, HFILL}},
|
|
/* BGP L2 extended community RFC 4761, RFC 6624 */
|
|
/* draft-ietf-l2vpn-vpls-multihoming */
|
|
{ &hf_bgp_ext_com_l2_encaps,
|
|
{ "Encaps Type", "bgp.ext_com_l2.encaps_type", FT_UINT8, BASE_DEC,
|
|
VALS(bgp_l2vpn_encaps), 0, NULL, HFILL}},
|
|
{ &hf_bgp_ext_com_l2_c_flags,
|
|
{ "Control Flags", "bgp.ext_com_l2.c_flags", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_ext_com_l2_flag_d,
|
|
{ "Down flag", "bgp.ext_com_l2.flag_d",FT_BOOLEAN, 8,
|
|
TFS(&tfs_set_notset), BGP_EXT_COM_L2_FLAG_D, NULL, HFILL }},
|
|
{ &hf_bgp_ext_com_l2_flag_z1,
|
|
{ "Unassigned", "bgp.ext_com_l2.flag_z1",FT_UINT8, BASE_DEC,
|
|
NULL, BGP_EXT_COM_L2_FLAG_Z1, "Must be Zero", HFILL }},
|
|
{ &hf_bgp_ext_com_l2_flag_f,
|
|
{ "Flush flag", "bgp.ext_com_l2.flag_f",FT_BOOLEAN, 8,
|
|
TFS(&tfs_set_notset), BGP_EXT_COM_L2_FLAG_F, NULL, HFILL }},
|
|
{ &hf_bgp_ext_com_l2_flag_z345,
|
|
{ "Unassigned", "bgp.ext_com_l2.flag_z345",FT_UINT8, BASE_DEC,
|
|
NULL, BGP_EXT_COM_L2_FLAG_Z345, "Must be Zero", HFILL }},
|
|
{ &hf_bgp_ext_com_l2_flag_c,
|
|
{ "C flag", "bgp.ext_com_l2.flag_c",FT_BOOLEAN, 8,
|
|
TFS(&tfs_set_notset), BGP_EXT_COM_L2_FLAG_C, NULL, HFILL }},
|
|
{ &hf_bgp_ext_com_l2_flag_s,
|
|
{ "S flag", "bgp.ext_com_l2.flag_s",FT_BOOLEAN, 8,
|
|
TFS(&tfs_set_notset), BGP_EXT_COM_L2_FLAG_S, NULL, HFILL }},
|
|
{ &hf_bgp_ext_com_l2_mtu,
|
|
{ "Layer-2 MTU", "bgp.ext_com_l2.l2_mtu", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL}},
|
|
/* idr-ls-03 */
|
|
{ &hf_bgp_ls_type,
|
|
{ "Type", "bgp.ls.type", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, "BGP-LS message type", HFILL }},
|
|
{ &hf_bgp_ls_length,
|
|
{ "Length", "bgp.ls.length", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, "The total length of the message payload in octets", HFILL }},
|
|
{ &hf_bgp_ls_safi72_nlri,
|
|
{ "Link State SAFI 72 NLRI", "bgp.ls.nlri_safi72", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_safi128_nlri,
|
|
{ "Link State SAFI 128 NLRI", "bgp.ls.nlri_safi128", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_safi128_nlri_route_distinguisher,
|
|
{ "Route Distinguisher", "bgp.ls.nlri_safi128_route_distinguisher", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_safi128_nlri_route_distinguisher_type,
|
|
{ "Route Distinguisher Type", "bgp.ls.nlri_safi128_route_distinguisher_type", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_safi128_nlri_route_dist_admin_asnum_2,
|
|
{ "Administrator Subfield", "bgp.ls.nlri_safi128_route_distinguisher_admin_as_num_2", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_safi128_nlri_route_dist_admin_ipv4,
|
|
{ "Administrator Subfield", "bgp.ls.nlri_safi128_route_distinguisher_admin_ipv4", FT_IPv4,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_safi128_nlri_route_dist_admin_asnum_4,
|
|
{ "Administrator Subfield", "bgp.ls.nlri_safi128_route_distinguisher_admin_as_num_4", FT_UINT32,
|
|
BASE_HEX_DEC, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_safi128_nlri_route_dist_asnum_2,
|
|
{ "Assigned Number Subfield", "bgp.ls.nlri_safi128_route_distinguisher_asnum_2", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_safi128_nlri_route_dist_asnum_4,
|
|
{ "Assigned Number Subfield", "bgp.ls.nlri_safi128_route_distinguisher_asnum_4", FT_UINT32,
|
|
BASE_HEX_DEC, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_nlri_type,
|
|
{ "NLRI Type", "bgp.ls.nlri_type", FT_UINT16,
|
|
BASE_DEC, VALS(bgp_ls_nlri_type_vals), 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_nlri_length,
|
|
{ "NLRI Length", "bgp.ls.nlri_length", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_nlri_link_nlri_type,
|
|
{ "Link-State NLRI Link NLRI", "bgp.ls.nlri_link", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_nlri_link_descriptors_tlv,
|
|
{ "Link Descriptors TLV", "bgp.ls.nlri_link_descriptors_tlv", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_nlri_prefix_descriptors_tlv,
|
|
{ "Prefix Descriptors TLV", "bgp.ls.nlri_prefix_descriptors_tlv", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_nlri_link_local_identifier,
|
|
{ "Link Local Identifier", "bgp.ls.nlri_link_local_identifier", FT_UINT32,
|
|
BASE_HEX_DEC, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_nlri_link_remote_identifier,
|
|
{ "Link Remote Identifier", "bgp.ls.nlri_link_remote_identifier", FT_UINT32,
|
|
BASE_HEX_DEC, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_nlri_ipv4_interface_address,
|
|
{ "IPv4 Interface Address", "bgp.ls.nlri_ipv4_interface_address", FT_IPv4,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_nlri_ipv4_neighbor_address,
|
|
{ "IPv4 Neighbor Address", "bgp.ls.nlri_ipv4_neighbor_address", FT_IPv4,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_nlri_ipv6_interface_address,
|
|
{ "IPv6 Interface Address", "bgp.ls.nlri_ipv6_interface_address", FT_IPv6,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_nlri_ipv6_neighbor_address,
|
|
{ "IPv6 Neighbor Address", "bgp.ls.nlri_ipv6_neighbor_address", FT_IPv6,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_nlri_multi_topology_id,
|
|
{ "Multi Topology ID", "bgp.ls.nlri_multi_topology_id", FT_UINT16,
|
|
BASE_DEC_HEX, NULL, 0xfff, NULL, HFILL}},
|
|
{ &hf_bgp_ls_nlri_ospf_route_type,
|
|
{ "OSPF Route Type", "bgp.ls.nlri_ospf_route_type", FT_UINT8,
|
|
BASE_DEC, VALS(link_state_prefix_descriptors_ospf_route_type), 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_nlri_ip_reachability_prefix_length,
|
|
{ "Prefix Length in bits", "bgp.ls.nlri_ip_reachability_prefix_length", FT_UINT8,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_nlri_ip_reachability_prefix_ip,
|
|
{ "Prefix IP", "bgp.ls.nlri_ip_reachability_prefix_ip", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_nlri_node_nlri_type,
|
|
{ "Link-State NLRI Node NLRI", "bgp.ls.nlri_node", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_nlri_node_protocol_id,
|
|
{ "Protocol ID", "bgp.ls.nlri_node.protocol_id", FT_UINT8,
|
|
BASE_DEC, VALS(link_state_nlri_protocol_id_values), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_ls_nlri_node_identifier,
|
|
{ "Identifier", "bgp.ls.nlri_node.identifier", FT_UINT64,
|
|
BASE_DEC | BASE_VAL64_STRING, VALS64(link_state_nlri_routing_universe_values), 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_ls_ipv4_topology_prefix_nlri_type,
|
|
{ "Link-State NLRI IPv4 Topology Prefix", "bgp.ls.ipv4_topology_prefix", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_ipv6_topology_prefix_nlri_type,
|
|
{ "Link-State NLRI IPv6 Topology Prefix", "bgp.ls.ipv6_topology_prefix", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
/* NLRI TLVs */
|
|
{ &hf_bgp_ls_tlv_local_node_descriptors,
|
|
{ "Local Node Descriptors TLV", "bgp.ls.tlv.local_node_descriptors", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_remote_node_descriptors,
|
|
{ "Remote Node Descriptors TLV", "bgp.ls.tlv.remote_node_descriptors", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_autonomous_system,
|
|
{ "Autonomous System TLV", "bgp.ls.tlv.autonomous_system", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_autonomous_system_id,
|
|
{ "AS ID", "bgp.ls.tlv.autonomous_system.id", FT_UINT32,
|
|
BASE_DEC_HEX, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_bgp_ls_identifier,
|
|
{ "BGP-LS Identifier TLV", "bgp.ls.tlv.bgp_ls_identifier", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_bgp_ls_identifier_id,
|
|
{ "BGP-LS ID", "bgp.ls.tlv.bgp_ls_identifier_id", FT_UINT32,
|
|
BASE_DEC_HEX, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_area_id,
|
|
{ "Area ID TLV", "bgp.ls.tlv.area_id", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_area_id_id,
|
|
{ "Area ID", "bgp.ls.tlv.area_id.id", FT_UINT32,
|
|
BASE_DEC_HEX, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_ipv4_router_id_of_local_node,
|
|
{ "IPv4 Router-ID of Local Node TLV", "bgp.ls.tlv.ipv4_router_id_of_local_node", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_ls_tlv_ipv4_router_id_value,
|
|
{ "IPv4 Router-ID", "bgp.ls.tlv.ipv4_router_id_value", FT_IPv4,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_ipv6_router_id_of_local_node,
|
|
{ "IPv6 Router-ID of Local Node TLV", "bgp.ls.tlv.ipv6_router_id_of_local_node", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_ls_tlv_ipv6_router_id_value,
|
|
{ "IPv6 Router-ID", "bgp.ls.tlv.ipv6_router_id_of_local_node_value", FT_IPv6,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_ls_tlv_ipv4_router_id_of_remote_node,
|
|
{ "IPv4 Router-ID of Remote Node TLV", "bgp.ls.tlv.ipv4_router_id_of_remote_node", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_ls_tlv_ipv6_router_id_of_remote_node,
|
|
{ "IPv6 Router-ID of Remote Node TLV", "bgp.ls.tlv.ipv6_router_id_of_remote_node", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_ls_tlv_link_local_remote_identifiers,
|
|
{ "Link Local/Remote Identifiers TLV", "bgp.ls.tlv.link_local_remote_identifiers", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_ls_tlv_ipv4_interface_address,
|
|
{ "IPv4 interface address TLV", "bgp.ls.tlv.ipv4_interface_address", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_ls_tlv_ipv4_neighbor_address,
|
|
{ "IPv4 neighbor address TLV", "bgp.ls.tlv.ipv4_neighbor_address", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_ipv6_interface_address,
|
|
{ "IPv6 interface address TLV", "bgp.ls.tlv.ipv6_interface_address", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_ipv6_neighbor_address,
|
|
{ "IPv6 neighbor address TLV", "bgp.ls.tlv.ipv6_neighbor_address", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_multi_topology_id,
|
|
{ "Multi Topology ID TLV", "bgp.ls.tlv.multi_topology_id", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_ospf_route_type,
|
|
{ "OSPF Route Type TLV", "bgp.ls.tlv.ospf_route_type", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_ip_reachability_information,
|
|
{ "IP Reachability Information TLV", "bgp.ls.tlv.ip_reachability_information", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_administrative_group_color,
|
|
{ "Administrative group (color) TLV", "bgp.ls.tlv.administrative_group_color", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_administrative_group_color_value,
|
|
{ "Group Mask", "bgp.ls.tlv.administrative_group_color", FT_UINT32,
|
|
BASE_DEC, NULL, 0xffff, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_max_link_bandwidth,
|
|
{ "Maximum link bandwidth TLV", "bgp.ls.tlv.maximum_link_bandwidth", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_max_reservable_link_bandwidth,
|
|
{ "Maximum reservable link bandwidth TLV", "bgp.ls.tlv.maximum_reservable_link_bandwidth", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_unreserved_bandwidth,
|
|
{ "Unreserved bandwidth TLV", "bgp.ls.tlv.unreserved_bandwidth", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_bandwidth_value,
|
|
{"Bandwidth", "bgp.ls.bandwidth_value", FT_FLOAT,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_te_default_metric,
|
|
{ "TE Default Metric TLV", "bgp.ls.tlv.te_default_metric", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_te_default_metric_value,
|
|
{ "TE Default Metric", "bgp.ls.tlv.te_default_metric_value", FT_UINT24,
|
|
BASE_HEX_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_bgp_ls_tlv_link_protection_type,
|
|
{ "Link Protection Type TLV", "bgp.ls.tlv.link_protection_type", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_link_protection_type_value,
|
|
{ "Protection Capabilities", "bgp.ls.tlv.link_protection_type_value", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_mpls_protocol_mask,
|
|
{ "MPLS Protocol Mask TLV", "bgp.ls.tlv.mpls_protocol_mask", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_metric,
|
|
{ "Metric TLV", "bgp.ls.tlv.metric", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_metric_value,
|
|
{ "IGP Metric", "bgp.ls.tlv.metric_value", FT_UINT24,
|
|
BASE_HEX_DEC, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_shared_risk_link_group,
|
|
{ "Shared Risk Link Group TLV", "bgp.ls.tlv.shared_risk_link_group", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_shared_risk_link_group_value,
|
|
{ "Shared Risk Link Group Value", "bgp.ls.tlv.shared_risk_link_group_value", FT_UINT32,
|
|
BASE_HEX_DEC, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_opaque_link_attribute,
|
|
{ "Opaque Link Attribute TLV", "bgp.ls.tlv.opaque_link_attribute", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_opaque_link_attribute_value,
|
|
{ "Opaque link attributes", "bgp.ls.tlv.opaque_link_attribute_value", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_link_name_attribute,
|
|
{ "Opaque Link Attribute TLV", "bgp.ls.tlv.link_name_attribute", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_link_name_attribute_value,
|
|
{"Link Name", "bgp.ls.tlv.link_name_attribute_value", FT_STRING,
|
|
STR_ASCII, NULL, 0, NULL, HFILL }},
|
|
{ &hf_bgp_ls_tlv_igp_flags,
|
|
{ "IGP Flags TLV", "bgp.ls.tlv.igp_flags", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_route_tag,
|
|
{ "Route Tag TLV", "bgp.ls.tlv.route_tag", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_route_tag_value,
|
|
{ "Route Tag Value", "bgp.ls.tlv.route_tag_value", FT_UINT32,
|
|
BASE_HEX_DEC, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_route_extended_tag,
|
|
{ "Extended Route Tag TLV", "bgp.ls.tlv.route_extended_tag", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_route_extended_tag_value,
|
|
{"Extended Route Tag", "bgp.ls.tlv.extended_route_tag_value", FT_UINT64,
|
|
BASE_HEX_DEC, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_prefix_metric,
|
|
{ "Prefix Metric TLV", "bgp.ls.tlv.prefix_metric", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_prefix_metric_value,
|
|
{ "Prefix Metric", "bgp.ls.tlv.prefix_metric_value", FT_UINT32,
|
|
BASE_HEX_DEC, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_ospf_forwarding_address,
|
|
{ "OSPF Forwarding Address TLV", "bgp.ls.tlv.ospf_forwarding_address", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_ospf_forwarding_address_ipv4_address,
|
|
{ "OSPF forwarding IPv4 address", "bgp.ls.tlv.ospf_forwarding_address_ipv4", FT_IPv4,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_ospf_forwarding_address_ipv6_address,
|
|
{ "OSPF forwarding IPv6 address", "bgp.ls.tlv.ospf_forwarding_address_ipv6", FT_IPv6,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_opaque_prefix_attribute,
|
|
{ "Opaque Prefix Attribute TLV", "bgp.ls.tlv.opaque_prefix_attribute", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_opaque_prefix_attribute_value,
|
|
{ "Opaque prefix attributes", "bgp.ls.tlv.opaque_prefix_attribute_value", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_igp_router,
|
|
{ "IGP Router-ID", "bgp.ls.tlv.igp_router", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_igp_router_id,
|
|
{ "IGP ID", "bgp.ls.tlv.igp_router_id", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_node_flags_bits,
|
|
{ "Node Flags Bits TLV", "bgp.ls.tlv.node_flags_bits", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_opaque_node_properties,
|
|
{ "Opaque Node Properties TLV", "bgp.ls.tlv.opaque_node_properties", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_opaque_node_properties_value,
|
|
{ "Opaque Node Properties", "bgp.ls.tlv.opaque_node_properties_value", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_node_name,
|
|
{ "Node Name TLV", "bgp.ls.tlv.node_name", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_node_name_value,
|
|
{"Node name", "bgp.ls.tlv.node_name_value", FT_STRING,
|
|
STR_ASCII, NULL, 0, NULL, HFILL }},
|
|
{ &hf_bgp_ls_tlv_is_is_area_identifier,
|
|
{ "IS-IS Area Identifier TLV", "bgp.ls.tlv.is_is_area_identifier", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_bgp_ls_tlv_is_is_area_identifier_value,
|
|
{ "IS-IS Area Identifier", "bgp.ls.tlv.is_is_area_identifier_value", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
/* Link Protection Types */
|
|
{ &hf_bgp_ls_link_protection_type_enhanced,
|
|
{ "Enhanced", "bgp.ls.link_protection_type.enhanced", FT_BOOLEAN, 8,
|
|
TFS(&tfs_capable_not_capable), 0x20, NULL, HFILL }},
|
|
{ &hf_bgp_ls_link_protection_type_dedicated_1plus1,
|
|
{ "Dedicated 1+1", "bgp.ls.link_protection_type.dedicated_1plus1", FT_BOOLEAN, 8,
|
|
TFS(&tfs_capable_not_capable), 0x10, NULL, HFILL }},
|
|
{ &hf_bgp_ls_link_protection_type_dedicated_1to1,
|
|
{ "Dedicated 1:1", "bgp.ls.link_protection_type.dedicated_1colon1", FT_BOOLEAN, 8,
|
|
TFS(&tfs_capable_not_capable), 0x08, NULL, HFILL }},
|
|
{ &hf_bgp_ls_link_protection_type_shared,
|
|
{ "Shared", "bgp.ls.link_protection_type.shared", FT_BOOLEAN, 8,
|
|
TFS(&tfs_capable_not_capable), 0x04, NULL, HFILL }},
|
|
{ &hf_bgp_ls_link_protection_type_unprotected,
|
|
{ "Unprotected", "bgp.ls.link_protection_type.unprotected", FT_BOOLEAN, 8,
|
|
TFS(&tfs_capable_not_capable), 0x02, NULL, HFILL }},
|
|
{ &hf_bgp_ls_link_protection_type_extra_traffic,
|
|
{ "Extra Traffic", "bgp.ls.link_protection_type.extra_traffic", FT_BOOLEAN, 8,
|
|
TFS(&tfs_capable_not_capable), 0x01, NULL, HFILL }},
|
|
/* MPLS Protocol Mask flags */
|
|
{ &hf_bgp_ls_mpls_protocol_mask_flag_l,
|
|
{ "Label Distribution Protocol (LDP)", "bgp.ls.protocol_mask_tlv.mpls_protocol.l", FT_BOOLEAN, 8,
|
|
TFS(&tfs_set_notset), 0x80, NULL, HFILL}},
|
|
{ &hf_bgp_ls_mpls_protocol_mask_flag_r,
|
|
{ "Extension to RSVP for LSP Tunnels (RSVP-TE)", "bgp.ls.protocol_mask_tlv.mpls_protocol.r", FT_BOOLEAN, 8,
|
|
TFS(&tfs_set_notset), 0x40, NULL, HFILL}},
|
|
/* IGP Flags TLV */
|
|
{ &hf_bgp_ls_igp_flags_flag_d,
|
|
{ "IS-IS Up/Down Bit", "bgp.ls.protocol_mask_tlv.igp_flags_flag_d.d", FT_BOOLEAN, 8,
|
|
TFS(&tfs_set_notset), 0x80, NULL, HFILL}},
|
|
/* Node Flag Bits TLV flags */
|
|
{ &hf_bgp_ls_node_flag_bits_overload,
|
|
{ "Overload Bit", "bgp.ls.node_flag_bits.overload", FT_BOOLEAN, 8,
|
|
TFS(&tfs_set_notset), 0x80, NULL, HFILL}},
|
|
{ &hf_bgp_ls_node_flag_bits_attached,
|
|
{ "Attached Bit", "bgp.ls.node_flag_bits.attached", FT_BOOLEAN, 8,
|
|
TFS(&tfs_set_notset), 0x40, NULL, HFILL}},
|
|
{ &hf_bgp_ls_node_flag_bits_external,
|
|
{ "External Bit", "bgp.ls.node_flag_bits.external", FT_BOOLEAN, 8,
|
|
TFS(&tfs_set_notset), 0x20, NULL, HFILL}},
|
|
{ &hf_bgp_ls_node_flag_bits_abr,
|
|
{ "ABR Bit", "bgp.ls.node_flag_bits.abr", FT_BOOLEAN, 8,
|
|
TFS(&tfs_set_notset), 0x10, NULL, HFILL}},
|
|
};
|
|
|
|
static gint *ett[] = {
|
|
&ett_bgp,
|
|
&ett_bgp_prefix,
|
|
&ett_bgp_unfeas,
|
|
&ett_bgp_attrs,
|
|
&ett_bgp_attr,
|
|
&ett_bgp_attr_flags,
|
|
&ett_bgp_mp_nhna,
|
|
&ett_bgp_mp_reach_nlri,
|
|
&ett_bgp_mp_unreach_nlri,
|
|
&ett_bgp_mp_snpa,
|
|
&ett_bgp_nlri,
|
|
&ett_bgp_open,
|
|
&ett_bgp_update,
|
|
&ett_bgp_notification,
|
|
&ett_bgp_route_refresh,
|
|
&ett_bgp_capability,
|
|
&ett_bgp_as_path_segment,
|
|
&ett_bgp_as_path_segment_asn,
|
|
&ett_bgp_communities,
|
|
&ett_bgp_community,
|
|
&ett_bgp_cluster_list,
|
|
&ett_bgp_options,
|
|
&ett_bgp_option,
|
|
&ett_bgp_cap,
|
|
&ett_bgp_extended_communities,
|
|
&ett_bgp_extended_com_fspec_redir,
|
|
&ett_bgp_ext_com_flags,
|
|
&ett_bgp_ext_com_l2_flags,
|
|
&ett_bgp_ssa,
|
|
&ett_bgp_ssa_subtree,
|
|
&ett_bgp_orf,
|
|
&ett_bgp_orf_entry,
|
|
&ett_bgp_mcast_vpn_nlri,
|
|
&ett_bgp_flow_spec_nlri,
|
|
&ett_bgp_flow_spec_nlri_filter,
|
|
&ett_bgp_flow_spec_nlri_op_flags,
|
|
&ett_bgp_flow_spec_nlri_tcp,
|
|
&ett_bgp_flow_spec_nlri_ff,
|
|
&ett_bgp_tunnel_tlv,
|
|
&ett_bgp_tunnel_tlv_subtree,
|
|
&ett_bgp_tunnel_subtlv,
|
|
&ett_bgp_tunnel_subtlv_subtree,
|
|
&ett_bgp_link_state,
|
|
};
|
|
static ei_register_info ei[] = {
|
|
{ &ei_bgp_cap_len_bad, { "bgp.cap.length.bad", PI_MALFORMED, PI_ERROR, "Capability length is wrong", EXPFILL }},
|
|
{ &ei_bgp_cap_gr_helper_mode_only, { "bgp.cap.gr.helper_mode_only", PI_REQUEST_CODE, PI_CHAT, "Graceful Restart Capability supported in Helper mode only", EXPFILL }},
|
|
{ &ei_bgp_notify_minor_unknown, { "bgp.notify.minor_error.unknown", PI_UNDECODED, PI_NOTE, "Unknown notification error", EXPFILL }},
|
|
{ &ei_bgp_route_refresh_orf_type_unknown, { "bgp.route_refresh.orf.type.unknown", PI_CHAT, PI_ERROR, "ORFEntry-Unknown", EXPFILL }},
|
|
{ &ei_bgp_length_invalid, { "bgp.length.invalid", PI_MALFORMED, PI_ERROR, "Length is invalid", EXPFILL }},
|
|
{ &ei_bgp_afi_type_not_supported, { "bgp.afi_type_not_supported", PI_PROTOCOL, PI_ERROR, "AFI Type not supported", EXPFILL }},
|
|
{ &ei_bgp_ls_error, { "bgp.ls.error", PI_PROTOCOL, PI_ERROR, "Link State error", EXPFILL }},
|
|
};
|
|
|
|
module_t *bgp_module;
|
|
expert_module_t* expert_bgp;
|
|
|
|
static const enum_val_t asn_len[] = {
|
|
{"auto-detect", "Auto-detect", 0},
|
|
{"2", "2 octet", 2},
|
|
{"4", "4 octet", 4},
|
|
{NULL, NULL, -1}
|
|
};
|
|
|
|
proto_bgp = proto_register_protocol("Border Gateway Protocol",
|
|
"BGP", "bgp");
|
|
proto_register_field_array(proto_bgp, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
expert_bgp = expert_register_protocol(proto_bgp);
|
|
expert_register_field_array(expert_bgp, ei, array_length(ei));
|
|
|
|
bgp_module = prefs_register_protocol(proto_bgp, NULL);
|
|
prefs_register_bool_preference(bgp_module, "desegment",
|
|
"Reassemble BGP messages spanning multiple TCP segments",
|
|
"Whether the BGP dissector should reassemble messages spanning multiple TCP segments."
|
|
" To use this option, you must also enable \"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.",
|
|
&bgp_desegment);
|
|
prefs_register_enum_preference(bgp_module, "asn_len",
|
|
"Length of the AS number",
|
|
"BGP dissector detect the length of the AS number in AS_PATH attributes automatically or manually (NOTE: Automatic detection is not 100% accurate)",
|
|
&bgp_asn_len, asn_len, FALSE);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_bgp(void)
|
|
{
|
|
dissector_handle_t bgp_handle;
|
|
|
|
bgp_handle = create_dissector_handle(dissect_bgp, proto_bgp);
|
|
dissector_add_uint("tcp.port", BGP_TCP_PORT, bgp_handle);
|
|
}
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* ex: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|