![Jun-ichiro itojun Hagino](/assets/img/avatar_default.png)
- a few more tree types - RFC1771 NLRI printed on advertisements - AS_PATH parsing - lots of small cleanup on printing "byte" vs "bytes" From: Greg Hankins <gregh@cc.gatech.edu> svn path=/trunk/; revision=1015
134 lines
3.9 KiB
C
134 lines
3.9 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 1.4 1999/11/11 21:08:52 itojun Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@unicom.net>
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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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#define BGP_MAX_AS_PATH_LENGTH 32 /* guint16s */
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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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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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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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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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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 RFC 1771 */
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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, from RFC 1771 */
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#define AS_SET 1
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#define AS_SEQUENCE 2
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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 /* RFC1998 */
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#define BGPTYPE_CLUSTER_LIST 10 /* RFC1998 */
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#define BGPTYPE_DPA 11 /* work in progress */
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#define BGPTYPE_ADVERTISERS 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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/*
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* Convert prefix length into number of guint8s needed for prefix.
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*/
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#define convert_prefix(p) (((p) + 7) / (8))
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#endif
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