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/* packet-bgp.c
* Definitions for BGP packet disassembly structures and routine
*
* $Id: packet-bgp.h,v 1.25 2003/05/19 20:36:49 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef __PACKET_BGP_H__
#define __PACKET_BGP_H__
/* some handy things to know */
#define BGP_MAX_PACKET_SIZE 4096
#define BGP_MARKER_SIZE 16 /* size of BGP marker */
#define BGP_HEADER_SIZE 19 /* size of BGP header, including marker */
#define BGP_MIN_OPEN_MSG_SIZE 29
#define BGP_MIN_UPDATE_MSG_SIZE 23
#define BGP_MIN_NOTIFICATION_MSG_SIZE 21
#define BGP_MIN_KEEPALVE_MSG_SIZE BGP_HEADER_SIZE
#define BGP_TCP_PORT 179
/* BGP message types */
#define BGP_OPEN 1
#define BGP_UPDATE 2
#define BGP_NOTIFICATION 3
#define BGP_KEEPALIVE 4
#define BGP_ROUTE_REFRESH 5
#define BGP_CAPABILITY 6
#define BGP_ROUTE_REFRESH_CISCO 0x80
/* BGP OPEN message */
struct bgp_open {
guint8 bgpo_marker[BGP_MARKER_SIZE];
guint16 bgpo_len;
guint8 bgpo_type;
guint8 bgpo_version;
guint16 bgpo_myas;
guint16 bgpo_holdtime;
guint32 bgpo_id;
guint8 bgpo_optlen;
/* options should follow */
};
/* BGP NOTIFICATION message */
struct bgp_notification {
guint8 bgpn_marker[BGP_MARKER_SIZE];
guint16 bgpn_len;
guint8 bgpn_type;
guint8 bgpn_major;
guint8 bgpn_minor;
/* data should follow */
};
/* BGP ROUTE-REFRESH message */
struct bgp_route_refresh {
guint8 bgpr_marker[BGP_MARKER_SIZE];
guint16 bgpr_len;
guint8 bgpr_type;
guint16 bgpr_afi;
guint8 bgpr_reserved;
guint8 bgpr_safi;
};
/* path attribute */
struct bgp_attr {
guint8 bgpa_flags;
guint8 bgpa_type;
};
/* attribute flags, from RFC1771 */
#define BGP_ATTR_FLAG_OPTIONAL 0x80
#define BGP_ATTR_FLAG_TRANSITIVE 0x40
#define BGP_ATTR_FLAG_PARTIAL 0x20
#define BGP_ATTR_FLAG_EXTENDED_LENGTH 0x10
/* AS_PATH segment types */
#define AS_SET 1 /* RFC1771 */
#define AS_SEQUENCE 2 /* RFC1771 */
#define AS_CONFED_SET 4 /* RFC1965 has the wrong values, corrected in */
#define AS_CONFED_SEQUENCE 3 /* draft-ietf-idr-bgp-confed-rfc1965bis-01.txt */
/* OPEN message Optional Parameter types */
#define BGP_OPTION_AUTHENTICATION 1 /* RFC1771 */
#define BGP_OPTION_CAPABILITY 2 /* RFC2842 */
/* BGP capability code */
#define BGP_CAPABILITY_RESERVED 0 /* RFC2434 */
#define BGP_CAPABILITY_MULTIPROTOCOL 1 /* RFC2858 */
#define BGP_CAPABILITY_ROUTE_REFRESH 2 /* RFC2918 */
#define BGP_CAPABILITY_COOPERATIVE_ROUTE_FILTERING 3 /* draft-ietf-idr-route-filter-04.txt */
#define BGP_CAPABILITY_GRACEFUL_RESTART 0x40 /* draft-ietf-idr-restart-05 */
#define BGP_CAPABILITY_4_OCTET_AS_NUMBER 0x41 /* draft-ietf-idr-as4bytes-06 */
#define BGP_CAPABILITY_DYNAMIC_CAPABILITY 0x42 /* draft-ietf-idr-dynamic-cap-03 */
#define BGP_CAPABILITY_ORF_CISCO 0x82 /* Cisco */
#define BGP_CAPABILITY_ROUTE_REFRESH_CISCO 0x80 /* Cisco */
#define BGP_ORF_PREFIX_CISCO 0x80 /* Cisco */
#define BGP_ORF_COMM_CISCO 0x81 /* Cisco */
#define BGP_ORF_EXTCOMM_CISCO 0x82 /* Cisco */
#define BGP_ORF_ASPATH_CISCO 0x83 /* Cisco */
#define BGP_ORF_COMM 0x02 /* draft-ietf-idr-route-filter-06.txt */
#define BGP_ORF_EXTCOMM 0x03 /* draft-ietf-idr-route-filter-06.txt */
#define BGP_ORF_ASPATH 0x04 /* draft-ietf-idr-aspath-orf-02.txt */
/* draft-ietf-idr-route-filter-06.txt */
#define BGP_ORF_ACTION 0xc0
#define BGP_ORF_ADD 0x00
#define BGP_ORF_REMOVE 0x40
#define BGP_ORF_REMOVEALL 0x80
#define BGP_ORF_MATCH 0x10
#define BGP_ORF_PERMIT 0x00
#define BGP_ORF_DENY 0x10
/* well-known communities, from RFC1997 */
#define BGP_COMM_NO_EXPORT 0xFFFFFF01
#define BGP_COMM_NO_ADVERTISE 0xFFFFFF02
#define BGP_COMM_NO_EXPORT_SUBCONFED 0xFFFFFF03
#define FOURHEX0 0x00000000
#define FOURHEXF 0xFFFF0000
/* attribute types */
#define BGPTYPE_ORIGIN 1 /* RFC1771 */
#define BGPTYPE_AS_PATH 2 /* RFC1771 */
#define BGPTYPE_NEXT_HOP 3 /* RFC1771 */
#define BGPTYPE_MULTI_EXIT_DISC 4 /* RFC1771 */
#define BGPTYPE_LOCAL_PREF 5 /* RFC1771 */
#define BGPTYPE_ATOMIC_AGGREGATE 6 /* RFC1771 */
#define BGPTYPE_AGGREGATOR 7 /* RFC1771 */
#define BGPTYPE_COMMUNITIES 8 /* RFC1997 */
#define BGPTYPE_ORIGINATOR_ID 9 /* RFC2796 */
#define BGPTYPE_CLUSTER_LIST 10 /* RFC2796 */
#define BGPTYPE_DPA 11 /* work in progress */
#define BGPTYPE_ADVERTISER 12 /* RFC1863 */
#define BGPTYPE_RCID_PATH 13 /* RFC1863 */
#define BGPTYPE_MP_REACH_NLRI 14 /* RFC2858 */
#define BGPTYPE_MP_UNREACH_NLRI 15 /* RFC2858 */
#define BGPTYPE_EXTENDED_COMMUNITY 16 /* Draft Ramachandra */
#define BGPTYPE_NEW_AS_PATH 17 /* draft-ietf-idr-as4bytes */
#define BGPTYPE_NEW_AGGREGATOR 18 /* draft-ietf-idr-as4bytes */
/* Extended community type */
/* draft-ramachandra-bgp-ext-communities */
#define BGP_EXT_COM_RT_0 0x0002 /* Route Target,Format AS(2bytes):AN(4bytes) */
#define BGP_EXT_COM_RT_1 0x0102 /* Route Target,Format IP address:AN(2bytes) */
#define BGP_EXT_COM_RT_2 0x0202 /* Route Target,Format AS(2bytes):AN(4bytes) */
#define BGP_EXT_COM_RO_0 0x0003 /* Route Origin,Format AS(2bytes):AN(4bytes) */
#define BGP_EXT_COM_RO_1 0x0103 /* Route Origin,Format IP address:AN(2bytes) */
#define BGP_EXT_COM_RO_2 0x0203 /* Route Origin,Format AS(2bytes):AN(4bytes) */
#define BGP_EXT_COM_LINKBAND 0x0004 /* Link Bandwidth,Format AS(2B):Bandwidth(4B) */
/* rfc2547 bgp-mpls-vpns */
#define BGP_EXT_COM_VPN_ORIGIN 0x0005 /* OSPF Domin ID / VPN of Origin */
/* draft-rosen-vpns-ospf-bgp-mpls */
#define BGP_EXT_COM_OSPF_RTYPE 0X8000 /* OSPF Route Type,Format Area(4B):RouteType(1B):Options(1B) */
#define BGP_EXT_COM_OSPF_RID 0x8001 /* OSPF Router ID,Format RouterID(4B):Unused(2B) */
#define BGP_EXT_COM_L2INFO 0x800a /* draft-kompella-ppvpn-l2vpn */
/* OSPF codes for BGP_EXT_COM_OSPF_RTYPE draft-rosen-vpns-ospf-bgp-mpls */
#define BGP_OSPF_RTYPE_RTR 1 /* OSPF Router LSA */
#define BGP_OSPF_RTYPE_NET 2 /* OSPF Network LSA */
#define BGP_OSPF_RTYPE_SUM 3 /* OSPF Summary LSA */
#define BGP_OSPF_RTYPE_EXT 5 /* OSPF External LSA, note that ASBR doesn't apply to MPLS-VPN */
#define BGP_OSPF_RTYPE_NSSA 7 /* OSPF NSSA External*/
#define BGP_OSPF_RTYPE_SHAM 129 /* OSPF-MPLS-VPN Sham link */
#define BGP_OSPF_RTYPE_METRIC_TYPE 0x1 /* LSB of RTYPE Options Field */
/* Extended community & Route dinstinguisher formats */
#define FORMAT_AS2_LOC 0x00 /* Format AS(2bytes):AN(4bytes) */
#define FORMAT_IP_LOC 0x01 /* Format IP address:AN(2bytes) */
#define FORMAT_AS4_LOC 0x02 /* Format AS(4bytes):AN(2bytes) */
/* RFC 2858 subsequent address family numbers */
#define SAFNUM_UNICAST 1
#define SAFNUM_MULCAST 2
#define SAFNUM_UNIMULC 3
#define SAFNUM_MPLS_LABEL 4 /* rfc3107 */
#define SAFNUM_LAB_VPNUNICAST 128 /* Draft-rosen-rfc2547bis-03 */
#define SAFNUM_LAB_VPNMULCAST 129
#define SAFNUM_LAB_VPNUNIMULC 130
#ifndef offsetof
#define offsetof(type, member) ((size_t)(&((type *)0)->member))
#endif
#endif
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