2 * Definitions for BGP packet disassembly structures and routine
4 * $Id: packet-bgp.h,v 1.25 2003/05/19 20:36:49 guy Exp $
6 * Ethereal - Network traffic analyzer
7 * By Gerald Combs <gerald@ethereal.com>
8 * Copyright 1998 Gerald Combs
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version 2
13 * of the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25 #ifndef __PACKET_BGP_H__
26 #define __PACKET_BGP_H__
28 /* some handy things to know */
29 #define BGP_MAX_PACKET_SIZE 4096
30 #define BGP_MARKER_SIZE 16 /* size of BGP marker */
31 #define BGP_HEADER_SIZE 19 /* size of BGP header, including marker */
32 #define BGP_MIN_OPEN_MSG_SIZE 29
33 #define BGP_MIN_UPDATE_MSG_SIZE 23
34 #define BGP_MIN_NOTIFICATION_MSG_SIZE 21
35 #define BGP_MIN_KEEPALVE_MSG_SIZE BGP_HEADER_SIZE
36 #define BGP_TCP_PORT 179
38 /* BGP message types */
41 #define BGP_NOTIFICATION 3
42 #define BGP_KEEPALIVE 4
43 #define BGP_ROUTE_REFRESH 5
44 #define BGP_CAPABILITY 6
45 #define BGP_ROUTE_REFRESH_CISCO 0x80
47 /* BGP OPEN message */
49 guint8 bgpo_marker[BGP_MARKER_SIZE];
54 guint16 bgpo_holdtime;
57 /* options should follow */
60 /* BGP NOTIFICATION message */
61 struct bgp_notification {
62 guint8 bgpn_marker[BGP_MARKER_SIZE];
67 /* data should follow */
70 /* BGP ROUTE-REFRESH message */
71 struct bgp_route_refresh {
72 guint8 bgpr_marker[BGP_MARKER_SIZE];
86 /* attribute flags, from RFC1771 */
87 #define BGP_ATTR_FLAG_OPTIONAL 0x80
88 #define BGP_ATTR_FLAG_TRANSITIVE 0x40
89 #define BGP_ATTR_FLAG_PARTIAL 0x20
90 #define BGP_ATTR_FLAG_EXTENDED_LENGTH 0x10
92 /* AS_PATH segment types */
93 #define AS_SET 1 /* RFC1771 */
94 #define AS_SEQUENCE 2 /* RFC1771 */
95 #define AS_CONFED_SET 4 /* RFC1965 has the wrong values, corrected in */
96 #define AS_CONFED_SEQUENCE 3 /* draft-ietf-idr-bgp-confed-rfc1965bis-01.txt */
98 /* OPEN message Optional Parameter types */
99 #define BGP_OPTION_AUTHENTICATION 1 /* RFC1771 */
100 #define BGP_OPTION_CAPABILITY 2 /* RFC2842 */
102 /* BGP capability code */
103 #define BGP_CAPABILITY_RESERVED 0 /* RFC2434 */
104 #define BGP_CAPABILITY_MULTIPROTOCOL 1 /* RFC2858 */
105 #define BGP_CAPABILITY_ROUTE_REFRESH 2 /* RFC2918 */
106 #define BGP_CAPABILITY_COOPERATIVE_ROUTE_FILTERING 3 /* draft-ietf-idr-route-filter-04.txt */
107 #define BGP_CAPABILITY_GRACEFUL_RESTART 0x40 /* draft-ietf-idr-restart-05 */
108 #define BGP_CAPABILITY_4_OCTET_AS_NUMBER 0x41 /* draft-ietf-idr-as4bytes-06 */
109 #define BGP_CAPABILITY_DYNAMIC_CAPABILITY 0x42 /* draft-ietf-idr-dynamic-cap-03 */
110 #define BGP_CAPABILITY_ORF_CISCO 0x82 /* Cisco */
111 #define BGP_CAPABILITY_ROUTE_REFRESH_CISCO 0x80 /* Cisco */
113 #define BGP_ORF_PREFIX_CISCO 0x80 /* Cisco */
114 #define BGP_ORF_COMM_CISCO 0x81 /* Cisco */
115 #define BGP_ORF_EXTCOMM_CISCO 0x82 /* Cisco */
116 #define BGP_ORF_ASPATH_CISCO 0x83 /* Cisco */
117 #define BGP_ORF_COMM 0x02 /* draft-ietf-idr-route-filter-06.txt */
118 #define BGP_ORF_EXTCOMM 0x03 /* draft-ietf-idr-route-filter-06.txt */
119 #define BGP_ORF_ASPATH 0x04 /* draft-ietf-idr-aspath-orf-02.txt */
120 /* draft-ietf-idr-route-filter-06.txt */
121 #define BGP_ORF_ACTION 0xc0
122 #define BGP_ORF_ADD 0x00
123 #define BGP_ORF_REMOVE 0x40
124 #define BGP_ORF_REMOVEALL 0x80
125 #define BGP_ORF_MATCH 0x10
126 #define BGP_ORF_PERMIT 0x00
127 #define BGP_ORF_DENY 0x10
129 /* well-known communities, from RFC1997 */
130 #define BGP_COMM_NO_EXPORT 0xFFFFFF01
131 #define BGP_COMM_NO_ADVERTISE 0xFFFFFF02
132 #define BGP_COMM_NO_EXPORT_SUBCONFED 0xFFFFFF03
133 #define FOURHEX0 0x00000000
134 #define FOURHEXF 0xFFFF0000
136 /* attribute types */
137 #define BGPTYPE_ORIGIN 1 /* RFC1771 */
138 #define BGPTYPE_AS_PATH 2 /* RFC1771 */
139 #define BGPTYPE_NEXT_HOP 3 /* RFC1771 */
140 #define BGPTYPE_MULTI_EXIT_DISC 4 /* RFC1771 */
141 #define BGPTYPE_LOCAL_PREF 5 /* RFC1771 */
142 #define BGPTYPE_ATOMIC_AGGREGATE 6 /* RFC1771 */
143 #define BGPTYPE_AGGREGATOR 7 /* RFC1771 */
144 #define BGPTYPE_COMMUNITIES 8 /* RFC1997 */
145 #define BGPTYPE_ORIGINATOR_ID 9 /* RFC2796 */
146 #define BGPTYPE_CLUSTER_LIST 10 /* RFC2796 */
147 #define BGPTYPE_DPA 11 /* work in progress */
148 #define BGPTYPE_ADVERTISER 12 /* RFC1863 */
149 #define BGPTYPE_RCID_PATH 13 /* RFC1863 */
150 #define BGPTYPE_MP_REACH_NLRI 14 /* RFC2858 */
151 #define BGPTYPE_MP_UNREACH_NLRI 15 /* RFC2858 */
152 #define BGPTYPE_EXTENDED_COMMUNITY 16 /* Draft Ramachandra */
153 #define BGPTYPE_NEW_AS_PATH 17 /* draft-ietf-idr-as4bytes */
154 #define BGPTYPE_NEW_AGGREGATOR 18 /* draft-ietf-idr-as4bytes */
156 /* Extended community type */
157 /* draft-ramachandra-bgp-ext-communities */
158 #define BGP_EXT_COM_RT_0 0x0002 /* Route Target,Format AS(2bytes):AN(4bytes) */
159 #define BGP_EXT_COM_RT_1 0x0102 /* Route Target,Format IP address:AN(2bytes) */
160 #define BGP_EXT_COM_RT_2 0x0202 /* Route Target,Format AS(2bytes):AN(4bytes) */
161 #define BGP_EXT_COM_RO_0 0x0003 /* Route Origin,Format AS(2bytes):AN(4bytes) */
162 #define BGP_EXT_COM_RO_1 0x0103 /* Route Origin,Format IP address:AN(2bytes) */
163 #define BGP_EXT_COM_RO_2 0x0203 /* Route Origin,Format AS(2bytes):AN(4bytes) */
164 #define BGP_EXT_COM_LINKBAND 0x0004 /* Link Bandwidth,Format AS(2B):Bandwidth(4B) */
165 /* rfc2547 bgp-mpls-vpns */
166 #define BGP_EXT_COM_VPN_ORIGIN 0x0005 /* OSPF Domin ID / VPN of Origin */
167 /* draft-rosen-vpns-ospf-bgp-mpls */
168 #define BGP_EXT_COM_OSPF_RTYPE 0X8000 /* OSPF Route Type,Format Area(4B):RouteType(1B):Options(1B) */
169 #define BGP_EXT_COM_OSPF_RID 0x8001 /* OSPF Router ID,Format RouterID(4B):Unused(2B) */
170 #define BGP_EXT_COM_L2INFO 0x800a /* draft-kompella-ppvpn-l2vpn */
173 /* OSPF codes for BGP_EXT_COM_OSPF_RTYPE draft-rosen-vpns-ospf-bgp-mpls */
174 #define BGP_OSPF_RTYPE_RTR 1 /* OSPF Router LSA */
175 #define BGP_OSPF_RTYPE_NET 2 /* OSPF Network LSA */
176 #define BGP_OSPF_RTYPE_SUM 3 /* OSPF Summary LSA */
177 #define BGP_OSPF_RTYPE_EXT 5 /* OSPF External LSA, note that ASBR doesn't apply to MPLS-VPN */
178 #define BGP_OSPF_RTYPE_NSSA 7 /* OSPF NSSA External*/
179 #define BGP_OSPF_RTYPE_SHAM 129 /* OSPF-MPLS-VPN Sham link */
180 #define BGP_OSPF_RTYPE_METRIC_TYPE 0x1 /* LSB of RTYPE Options Field */
182 /* Extended community & Route dinstinguisher formats */
183 #define FORMAT_AS2_LOC 0x00 /* Format AS(2bytes):AN(4bytes) */
184 #define FORMAT_IP_LOC 0x01 /* Format IP address:AN(2bytes) */
185 #define FORMAT_AS4_LOC 0x02 /* Format AS(4bytes):AN(2bytes) */
187 /* RFC 2858 subsequent address family numbers */
188 #define SAFNUM_UNICAST 1
189 #define SAFNUM_MULCAST 2
190 #define SAFNUM_UNIMULC 3
191 #define SAFNUM_MPLS_LABEL 4 /* rfc3107 */
192 #define SAFNUM_LAB_VPNUNICAST 128 /* Draft-rosen-rfc2547bis-03 */
193 #define SAFNUM_LAB_VPNMULCAST 129
194 #define SAFNUM_LAB_VPNUNIMULC 130
197 #define offsetof(type, member) ((size_t)(&((type *)0)->member))