2 * Definitions for BGP packet disassembly structures and routine
4 * $Id: packet-bgp.h,v 1.10 2000/12/25 05:28:40 itojun Exp $
6 * Ethereal - Network traffic analyzer
7 * By Gerald Combs <gerald@zing.org>
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
31 #define BGP_HEADER_SIZE 19
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
47 guint8 bgp_marker[BGP_MARKER_SIZE];
52 /* BGP OPEN message */
54 guint8 bgpo_marker[BGP_MARKER_SIZE];
59 guint16 bgpo_holdtime;
62 /* options should follow */
65 /* BGP NOTIFICATION message */
66 struct bgp_notification {
67 guint8 bgpn_marker[BGP_MARKER_SIZE];
72 /* data should follow */
75 /* BGP ROUTE-REFRESH message */
76 struct bgp_route_refresh {
77 guint8 bgpr_marker[BGP_MARKER_SIZE];
91 /* attribute flags, from RFC1771 */
92 #define BGP_ATTR_FLAG_OPTIONAL 0x80
93 #define BGP_ATTR_FLAG_TRANSITIVE 0x40
94 #define BGP_ATTR_FLAG_PARTIAL 0x20
95 #define BGP_ATTR_FLAG_EXTENDED_LENGTH 0x10
97 /* AS_PATH segment types */
98 #define AS_SET 1 /* RFC1771 */
99 #define AS_SEQUENCE 2 /* RFC1771 */
100 #define AS_CONFED_SET 4 /* RFC1965 has the wrong values, corrected in */
101 #define AS_CONFED_SEQUENCE 3 /* draft-ietf-idr-bgp-confed-rfc1965bis-01.txt */
103 /* OPEN message Optional Parameter types */
104 #define BGP_OPTION_AUTHENTICATION 1 /* RFC1771 */
105 #define BGP_OPTION_CAPABILITY 2 /* RFC2842 */
107 /* BGP capability code */
108 #define BGP_CAPABILITY_RESERVED 0 /* RFC2434 */
109 #define BGP_CAPABILITY_MULTIPROTOCOL 1 /* RFC2858 */
110 #define BGP_CAPABILITY_ROUTE_REFRESH 2 /* RFC2918 */
112 /* well-known communities, from RFC1997 */
113 #define BGP_COMM_NO_EXPORT 0xFFFFFF01
114 #define BGP_COMM_NO_ADVERTISE 0xFFFFFF02
115 #define BGP_COMM_NO_EXPORT_SUBCONFED 0xFFFFFF03
116 #define FOURHEX0 0x0000
117 #define FOURHEXF 0xFFFF
119 /* attribute types */
120 #define BGPTYPE_ORIGIN 1 /* RFC1771 */
121 #define BGPTYPE_AS_PATH 2 /* RFC1771 */
122 #define BGPTYPE_NEXT_HOP 3 /* RFC1771 */
123 #define BGPTYPE_MULTI_EXIT_DISC 4 /* RFC1771 */
124 #define BGPTYPE_LOCAL_PREF 5 /* RFC1771 */
125 #define BGPTYPE_ATOMIC_AGGREGATE 6 /* RFC1771 */
126 #define BGPTYPE_AGGREGATOR 7 /* RFC1771 */
127 #define BGPTYPE_COMMUNITIES 8 /* RFC1997 */
128 #define BGPTYPE_ORIGINATOR_ID 9 /* RFC2796 */
129 #define BGPTYPE_CLUSTER_LIST 10 /* RFC2796 */
130 #define BGPTYPE_DPA 11 /* work in progress */
131 #define BGPTYPE_ADVERTISER 12 /* RFC1863 */
132 #define BGPTYPE_RCID_PATH 13 /* RFC1863 */
133 #define BGPTYPE_MP_REACH_NLRI 14 /* RFC2858 */
134 #define BGPTYPE_MP_UNREACH_NLRI 15 /* RFC2858 */
136 /* RFC1700 address family numbers */
138 #define AFNUM_INET6 2
141 #define AFNUM_BBN1822 5
146 #define AFNUM_X121 10
148 #define AFNUM_ATALK 12
149 #define AFNUM_DECNET 13
150 #define AFNUM_BANYAN 14
151 #define AFNUM_E164NSAP 15
153 #define CHECK_SIZE(x, s, l) \
155 if ((x) + (s) > (l)) \
160 #define offsetof(type, member) ((size_t)(&((type *)0)->member))