forked from osmocom/wireshark
143 lines
4.2 KiB
C
143 lines
4.2 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: packet-bgp.h,v 1.6 2000/01/07 22:05:30 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@zing.org>
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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
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#define BGP_HEADER_SIZE 19
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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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/* 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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/* BGP header */
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struct bgp {
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guint8 bgp_marker[BGP_MARKER_SIZE];
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guint16 bgp_len;
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guint8 bgp_type;
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};
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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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/* 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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/* 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 3 /* RFC1965 */
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#define AS_CONFED_SEQUENCE 4 /* RFC1965 */
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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 0x0000
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#define FOURHEXF 0xFFFF
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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 /* RFC1966 */
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#define BGPTYPE_CLUSTER_LIST 10 /* RFC1966 */
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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 /* RFC2283 */
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#define BGPTYPE_MP_UNREACH_NLRI 15 /* RFC2283 */
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/* RFC1700 address family numbers */
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#define AFNUM_INET 1
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#define AFNUM_INET6 2
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#define AFNUM_NSAP 3
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#define AFNUM_HDLC 4
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#define AFNUM_BBN1822 5
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#define AFNUM_802 6
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#define AFNUM_E163 7
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#define AFNUM_E164 8
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#define AFNUM_F69 9
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#define AFNUM_X121 10
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#define AFNUM_IPX 11
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#define AFNUM_ATALK 12
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#define AFNUM_DECNET 13
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#define AFNUM_BANYAN 14
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#define AFNUM_E164NSAP 15
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#define CHECK_SIZE(x, s, l) \
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do { \
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if ((x) + (s) > (l)) \
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return; \
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} while (0)
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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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