![Guy Harris](/assets/img/avatar_default.png)
o BGPv4 SAFI-Specific Attribute support - draft-kapoor-nalawade-idr-bgp-ssa-00.txt o Tunnel SAFI support for BGP - draft-nalawade-kapoor-tunnel-safi-02.txt o Small length fix svn path=/trunk/; revision=12977
213 lines
8.4 KiB
C
213 lines
8.4 KiB
C
/* packet-bgp.c
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* Definitions for BGP packet disassembly structures and routine
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*
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* $Id$
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __PACKET_BGP_H__
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#define __PACKET_BGP_H__
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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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/* 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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/* BGP OPEN message */
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struct bgp_open {
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guint8 bgpo_marker[BGP_MARKER_SIZE];
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guint16 bgpo_len;
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guint8 bgpo_type;
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guint8 bgpo_version;
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guint16 bgpo_myas;
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guint16 bgpo_holdtime;
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guint32 bgpo_id;
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guint8 bgpo_optlen;
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/* options should follow */
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};
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/* BGP NOTIFICATION message */
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struct bgp_notification {
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guint8 bgpn_marker[BGP_MARKER_SIZE];
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guint16 bgpn_len;
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guint8 bgpn_type;
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guint8 bgpn_major;
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guint8 bgpn_minor;
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/* data should follow */
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};
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/* BGP ROUTE-REFRESH message */
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struct bgp_route_refresh {
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guint8 bgpr_marker[BGP_MARKER_SIZE];
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guint16 bgpr_len;
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guint8 bgpr_type;
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guint16 bgpr_afi;
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guint8 bgpr_reserved;
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guint8 bgpr_safi;
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};
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/* path attribute */
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struct bgp_attr {
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guint8 bgpa_flags;
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guint8 bgpa_type;
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};
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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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/* 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_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 0x40
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#define BGP_ORF_REMOVEALL 0x80
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#define BGP_ORF_MATCH 0x10
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#define BGP_ORF_PERMIT 0x00
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#define BGP_ORF_DENY 0x10
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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_NEW_AS_PATH 17 /* draft-ietf-idr-as4bytes */
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#define BGPTYPE_NEW_AGGREGATOR 18 /* draft-ietf-idr-as4bytes */
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#define BGPTYPE_SAFI_SPECIFIC_ATTR 19 /* draft-kapoor-nalawade-idr-bgp-ssa-00.txt */
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/* Extended community type */
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/* draft-ramachandra-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(2bytes):AN(4bytes) */
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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 0x0004 /* Link Bandwidth,Format AS(2B):Bandwidth(4B) */
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/* rfc2547 bgp-mpls-vpns */
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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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/* 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_TUNNEL 64 /* draft-nalawade-kapoor-tunnel-safi-02.txt */
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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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#ifndef offsetof
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#define offsetof(type, member) ((size_t)(&((type *)0)->member))
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#endif
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#endif
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