/* 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 * 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