1860 lines
62 KiB
C
1860 lines
62 KiB
C
/*
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* Copyright (C) 1999 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Extensively modified by Hannes Gredler (hannes@juniper.net) for more
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* complete BGP support.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifndef lint
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static const char rcsid[] _U_ =
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"@(#) $Header: /tcpdump/master/tcpdump/print-bgp.c,v 1.72.2.4 2004/03/24 00:04:04 guy Exp $";
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#endif
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#include <tcpdump-stdinc.h>
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#include <stdio.h>
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#include <string.h>
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#include "interface.h"
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#include "addrtoname.h"
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#include "extract.h"
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struct bgp {
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u_int8_t bgp_marker[16];
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u_int16_t bgp_len;
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u_int8_t bgp_type;
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};
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#define BGP_SIZE 19 /* unaligned */
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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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#define BGP_ROUTE_REFRESH 5
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static struct tok bgp_msg_values[] = {
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{ BGP_OPEN, "Open"},
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{ BGP_UPDATE, "Update"},
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{ BGP_NOTIFICATION, "Notification"},
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{ BGP_KEEPALIVE, "Keepalive"},
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{ BGP_ROUTE_REFRESH, "Route Refresh"},
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{ 0, NULL}
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};
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struct bgp_open {
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u_int8_t bgpo_marker[16];
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u_int16_t bgpo_len;
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u_int8_t bgpo_type;
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u_int8_t bgpo_version;
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u_int16_t bgpo_myas;
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u_int16_t bgpo_holdtime;
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u_int32_t bgpo_id;
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u_int8_t bgpo_optlen;
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/* options should follow */
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};
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#define BGP_OPEN_SIZE 29 /* unaligned */
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struct bgp_opt {
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u_int8_t bgpopt_type;
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u_int8_t bgpopt_len;
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/* variable length */
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};
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#define BGP_OPT_SIZE 2 /* some compilers may pad to 4 bytes */
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struct bgp_notification {
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u_int8_t bgpn_marker[16];
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u_int16_t bgpn_len;
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u_int8_t bgpn_type;
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u_int8_t bgpn_major;
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u_int8_t bgpn_minor;
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};
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#define BGP_NOTIFICATION_SIZE 21 /* unaligned */
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struct bgp_route_refresh {
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u_int8_t bgp_marker[16];
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u_int16_t len;
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u_int8_t type;
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u_int8_t afi[2]; /* the compiler messes this structure up */
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u_int8_t res; /* when doing misaligned sequences of int8 and int16 */
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u_int8_t safi; /* afi should be int16 - so we have to access it using */
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}; /* EXTRACT_16BITS(&bgp_route_refresh->afi) (sigh) */
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#define BGP_ROUTE_REFRESH_SIZE 23
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struct bgp_attr {
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u_int8_t bgpa_flags;
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u_int8_t bgpa_type;
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union {
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u_int8_t len;
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u_int16_t elen;
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} bgpa_len;
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#define bgp_attr_len(p) \
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(((p)->bgpa_flags & 0x10) ? \
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EXTRACT_16BITS(&(p)->bgpa_len.elen) : (p)->bgpa_len.len)
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#define bgp_attr_off(p) \
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(((p)->bgpa_flags & 0x10) ? 4 : 3)
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};
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#define BGPTYPE_ORIGIN 1
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#define BGPTYPE_AS_PATH 2
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#define BGPTYPE_NEXT_HOP 3
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#define BGPTYPE_MULTI_EXIT_DISC 4
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#define BGPTYPE_LOCAL_PREF 5
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#define BGPTYPE_ATOMIC_AGGREGATE 6
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#define BGPTYPE_AGGREGATOR 7
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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 /* draft-ietf-idr-bgp-dpa */
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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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#define BGPTYPE_EXTD_COMMUNITIES 16 /* draft-ietf-idr-bgp-ext-communities */
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static struct tok bgp_attr_values[] = {
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{ BGPTYPE_ORIGIN, "Origin"},
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{ BGPTYPE_AS_PATH, "AS Path"},
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{ BGPTYPE_NEXT_HOP, "Next Hop"},
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{ BGPTYPE_MULTI_EXIT_DISC, "Multi Exit Discriminator"},
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{ BGPTYPE_LOCAL_PREF, "Local Preference"},
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{ BGPTYPE_ATOMIC_AGGREGATE, "Atomic Aggregate"},
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{ BGPTYPE_AGGREGATOR, "Aggregator"},
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{ BGPTYPE_COMMUNITIES, "Community"},
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{ BGPTYPE_ORIGINATOR_ID, "Originator ID"},
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{ BGPTYPE_CLUSTER_LIST, "Cluster List"},
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{ BGPTYPE_DPA, "DPA"},
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{ BGPTYPE_ADVERTISERS, "Advertisers"},
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{ BGPTYPE_RCID_PATH, "RCID Path / Cluster ID"},
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{ BGPTYPE_MP_REACH_NLRI, "Multi-Protocol Reach NLRI"},
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{ BGPTYPE_MP_UNREACH_NLRI, "Multi-Protocol Unreach NLRI"},
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{ BGPTYPE_EXTD_COMMUNITIES, "Extended Community"},
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{ 255, "Reserved for development"},
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{ 0, NULL}
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};
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#define BGP_AS_SET 1
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#define BGP_AS_SEQUENCE 2
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#define BGP_CONFED_AS_SEQUENCE 3 /* draft-ietf-idr-rfc3065bis-01 */
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#define BGP_CONFED_AS_SET 4 /* draft-ietf-idr-rfc3065bis-01 */
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static struct tok bgp_as_path_segment_open_values[] = {
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{ BGP_AS_SEQUENCE, ""},
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{ BGP_AS_SET, "{ "},
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{ BGP_CONFED_AS_SEQUENCE, "( "},
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{ BGP_CONFED_AS_SET, "({ "},
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{ 0, NULL}
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};
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static struct tok bgp_as_path_segment_close_values[] = {
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{ BGP_AS_SEQUENCE, ""},
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{ BGP_AS_SET, "}"},
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{ BGP_CONFED_AS_SEQUENCE, ")"},
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{ BGP_CONFED_AS_SET, "})"},
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{ 0, NULL}
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};
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#define BGP_OPT_AUTH 1
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#define BGP_OPT_CAP 2
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static struct tok bgp_opt_values[] = {
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{ BGP_OPT_AUTH, "Authentication Information"},
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{ BGP_OPT_CAP, "Capabilities Advertisement"},
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{ 0, NULL}
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};
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#define BGP_CAPCODE_MP 1
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#define BGP_CAPCODE_RR 2
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#define BGP_CAPCODE_RESTART 64 /* draft-ietf-idr-restart-05 */
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#define BGP_CAPCODE_RR_CISCO 128
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static struct tok bgp_capcode_values[] = {
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{ BGP_CAPCODE_MP, "Multiprotocol Extensions"},
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{ BGP_CAPCODE_RR, "Route Refresh"},
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{ BGP_CAPCODE_RESTART, "Graceful Restart"},
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{ BGP_CAPCODE_RR_CISCO, "Route Refresh (Cisco)"},
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{ 0, NULL}
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};
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#define BGP_NOTIFY_MAJOR_MSG 1
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#define BGP_NOTIFY_MAJOR_OPEN 2
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#define BGP_NOTIFY_MAJOR_UPDATE 3
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#define BGP_NOTIFY_MAJOR_HOLDTIME 4
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#define BGP_NOTIFY_MAJOR_FSM 5
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#define BGP_NOTIFY_MAJOR_CEASE 6
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#define BGP_NOTIFY_MAJOR_CAP 7
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static struct tok bgp_notify_major_values[] = {
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{ BGP_NOTIFY_MAJOR_MSG, "Message Header Error"},
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{ BGP_NOTIFY_MAJOR_OPEN, "OPEN Message Error"},
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{ BGP_NOTIFY_MAJOR_UPDATE, "UPDATE Message Error"},
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{ BGP_NOTIFY_MAJOR_HOLDTIME,"Hold Timer Expired"},
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{ BGP_NOTIFY_MAJOR_FSM, "Finite State Machine Error"},
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{ BGP_NOTIFY_MAJOR_CEASE, "Cease"},
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{ BGP_NOTIFY_MAJOR_CAP, "Capability Message Error"},
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{ 0, NULL}
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};
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/* draft-ietf-idr-cease-subcode-02 */
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#define BGP_NOTIFY_MINOR_CEASE_MAXPRFX 1
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static struct tok bgp_notify_minor_cease_values[] = {
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{ BGP_NOTIFY_MINOR_CEASE_MAXPRFX, "Maximum Number of Prefixes Reached"},
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{ 2, "Administratively Shutdown"},
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{ 3, "Peer Unconfigured"},
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{ 4, "Administratively Reset"},
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{ 5, "Connection Rejected"},
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{ 6, "Other Configuration Change"},
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{ 7, "Connection Collision Resolution"},
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{ 0, NULL}
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};
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static struct tok bgp_notify_minor_msg_values[] = {
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{ 1, "Connection Not Synchronized"},
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{ 2, "Bad Message Length"},
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{ 3, "Bad Message Type"},
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{ 0, NULL}
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};
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static struct tok bgp_notify_minor_open_values[] = {
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{ 1, "Unsupported Version Number"},
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{ 2, "Bad Peer AS"},
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{ 3, "Bad BGP Identifier"},
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{ 4, "Unsupported Optional Parameter"},
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{ 5, "Authentication Failure"},
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{ 6, "Unacceptable Hold Time"},
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{ 0, NULL}
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};
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static struct tok bgp_notify_minor_update_values[] = {
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{ 1, "Malformed Attribute List"},
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{ 2, "Unrecognized Well-known Attribute"},
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{ 3, "Missing Well-known Attribute"},
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{ 4, "Attribute Flags Error"},
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{ 5, "Attribute Length Error"},
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{ 6, "Invalid ORIGIN Attribute"},
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{ 7, "AS Routing Loop"},
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{ 8, "Invalid NEXT_HOP Attribute"},
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{ 9, "Optional Attribute Error"},
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{ 10, "Invalid Network Field"},
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{ 11, "Malformed AS_PATH"},
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{ 0, NULL}
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};
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static struct tok bgp_notify_minor_cap_values[] = {
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{ 1, "Invalid Action Value" },
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{ 2, "Invalid Capability Length" },
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{ 3, "Malformed Capability Value" },
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{ 4, "Unsupported Capability Code" },
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{ 0, NULL }
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};
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static struct tok bgp_origin_values[] = {
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{ 0, "IGP"},
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{ 1, "EGP"},
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{ 2, "Incomplete"},
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{ 0, NULL}
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};
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/* Subsequent address family identifier, RFC2283 section 7 */
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#define SAFNUM_RES 0
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#define SAFNUM_UNICAST 1
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#define SAFNUM_MULTICAST 2
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#define SAFNUM_UNIMULTICAST 3
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/* labeled BGP RFC3107 */
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#define SAFNUM_LABUNICAST 4
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/* Section 4.3.4 of draft-rosen-rfc2547bis-03.txt */
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#define SAFNUM_VPNUNICAST 128
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#define SAFNUM_VPNMULTICAST 129
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#define SAFNUM_VPNUNIMULTICAST 130
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/* draft-marques-ppvpn-rt-constrain-01.txt */
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#define SAFNUM_RT_ROUTING_INFO 132
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#define BGP_VPN_RD_LEN 8
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static struct tok bgp_safi_values[] = {
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{ SAFNUM_RES, "Reserved"},
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{ SAFNUM_UNICAST, "Unicast"},
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{ SAFNUM_MULTICAST, "Multicast"},
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{ SAFNUM_UNIMULTICAST, "Unicast+Multicast"},
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{ SAFNUM_LABUNICAST, "labeled Unicast"},
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{ SAFNUM_VPNUNICAST, "labeled VPN Unicast"},
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{ SAFNUM_VPNMULTICAST, "labeled VPN Multicast"},
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{ SAFNUM_VPNUNIMULTICAST, "labeled VPN Unicast+Multicast"},
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{ SAFNUM_RT_ROUTING_INFO, "Route Target Routing Information"},
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{ 0, NULL }
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};
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/* well-known community */
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#define BGP_COMMUNITY_NO_EXPORT 0xffffff01
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#define BGP_COMMUNITY_NO_ADVERT 0xffffff02
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#define BGP_COMMUNITY_NO_EXPORT_SUBCONFED 0xffffff03
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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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/* draft-kompella-ppvpn-l2vpn */
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#define AFNUM_L2VPN 196 /* still to be approved by IANA */
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static struct tok bgp_afi_values[] = {
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{ 0, "Reserved"},
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{ AFNUM_INET, "IPv4"},
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{ AFNUM_INET6, "IPv6"},
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{ AFNUM_NSAP, "NSAP"},
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{ AFNUM_HDLC, "HDLC"},
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{ AFNUM_BBN1822, "BBN 1822"},
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{ AFNUM_802, "802"},
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{ AFNUM_E163, "E.163"},
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{ AFNUM_E164, "E.164"},
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{ AFNUM_F69, "F.69"},
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{ AFNUM_X121, "X.121"},
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{ AFNUM_IPX, "Novell IPX"},
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{ AFNUM_ATALK, "Appletalk"},
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{ AFNUM_DECNET, "Decnet IV"},
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{ AFNUM_BANYAN, "Banyan Vines"},
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{ AFNUM_E164NSAP, "E.164 with NSAP subaddress"},
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{ AFNUM_L2VPN, "Layer-2 VPN"},
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{ 0, NULL},
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};
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/* Extended community type - draft-ietf-idr-bgp-ext-communities-05 */
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#define BGP_EXT_COM_RT_0 0x0002 /* Route Target,Format AS(2bytes):AN(4bytes) */
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#define BGP_EXT_COM_RT_1 0x0102 /* Route Target,Format IP address:AN(2bytes) */
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#define BGP_EXT_COM_RT_2 0x0202 /* Route Target,Format AN(4bytes):local(2bytes) */
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#define BGP_EXT_COM_RO_0 0x0003 /* Route Origin,Format AS(2bytes):AN(4bytes) */
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#define BGP_EXT_COM_RO_1 0x0103 /* Route Origin,Format IP address:AN(2bytes) */
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#define BGP_EXT_COM_RO_2 0x0203 /* Route Origin,Format AN(4bytes):local(2bytes) */
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#define BGP_EXT_COM_LINKBAND 0x4004 /* Link Bandwidth,Format AS(2B):Bandwidth(4B) */
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/* rfc2547 bgp-mpls-vpns */
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#define BGP_EXT_COM_VPN_ORIGIN 0x0005 /* OSPF Domain ID / VPN of Origin - draft-rosen-vpns-ospf-bgp-mpls */
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#define BGP_EXT_COM_VPN_ORIGIN2 0x0105 /* duplicate - keep for backwards compatability */
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#define BGP_EXT_COM_VPN_ORIGIN3 0x0205 /* duplicate - keep for backwards compatability */
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#define BGP_EXT_COM_VPN_ORIGIN4 0x8005 /* duplicate - keep for backwards compatability */
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#define BGP_EXT_COM_OSPF_RTYPE 0x0306 /* OSPF Route Type,Format Area(4B):RouteType(1B):Options(1B) */
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#define BGP_EXT_COM_OSPF_RTYPE2 0x8000 /* duplicate - keep for backwards compatability */
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#define BGP_EXT_COM_OSPF_RID 0x0107 /* OSPF Router ID,Format RouterID(4B):Unused(2B) */
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#define BGP_EXT_COM_OSPF_RID2 0x8001 /* duplicate - keep for backwards compatability */
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#define BGP_EXT_COM_L2INFO 0x800a /* draft-kompella-ppvpn-l2vpn */
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static struct tok bgp_extd_comm_flag_values[] = {
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{ 0x8000, "vendor-specific"},
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{ 0x4000, "non-transitive"},
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{ 0, NULL},
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};
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static struct tok bgp_extd_comm_subtype_values[] = {
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{ BGP_EXT_COM_RT_0, "target"},
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{ BGP_EXT_COM_RT_1, "target"},
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{ BGP_EXT_COM_RT_2, "target"},
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{ BGP_EXT_COM_RO_0, "origin"},
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{ BGP_EXT_COM_RO_1, "origin"},
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{ BGP_EXT_COM_RO_2, "origin"},
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{ BGP_EXT_COM_LINKBAND, "link-BW"},
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{ BGP_EXT_COM_VPN_ORIGIN, "ospf-domain"},
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{ BGP_EXT_COM_VPN_ORIGIN2, "ospf-domain"},
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{ BGP_EXT_COM_VPN_ORIGIN3, "ospf-domain"},
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{ BGP_EXT_COM_VPN_ORIGIN4, "ospf-domain"},
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{ BGP_EXT_COM_OSPF_RTYPE, "ospf-route-type"},
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{ BGP_EXT_COM_OSPF_RTYPE2, "ospf-route-type"},
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{ BGP_EXT_COM_OSPF_RID, "ospf-router-id"},
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{ BGP_EXT_COM_OSPF_RID2, "ospf-router-id"},
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{ BGP_EXT_COM_L2INFO, "layer2-info"},
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{ 0, NULL},
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};
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/* OSPF codes for BGP_EXT_COM_OSPF_RTYPE draft-rosen-vpns-ospf-bgp-mpls */
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#define BGP_OSPF_RTYPE_RTR 1 /* OSPF Router LSA */
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#define BGP_OSPF_RTYPE_NET 2 /* OSPF Network LSA */
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#define BGP_OSPF_RTYPE_SUM 3 /* OSPF Summary LSA */
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#define BGP_OSPF_RTYPE_EXT 5 /* OSPF External LSA, note that ASBR doesn't apply to MPLS-VPN */
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#define BGP_OSPF_RTYPE_NSSA 7 /* OSPF NSSA External*/
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#define BGP_OSPF_RTYPE_SHAM 129 /* OSPF-MPLS-VPN Sham link */
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#define BGP_OSPF_RTYPE_METRIC_TYPE 0x1 /* LSB of RTYPE Options Field */
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static struct tok bgp_extd_comm_ospf_rtype_values[] = {
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{ BGP_OSPF_RTYPE_RTR, "Router" },
|
|
{ BGP_OSPF_RTYPE_NET, "Network" },
|
|
{ BGP_OSPF_RTYPE_SUM, "Summary" },
|
|
{ BGP_OSPF_RTYPE_EXT, "External" },
|
|
{ BGP_OSPF_RTYPE_NSSA,"NSSA External" },
|
|
{ BGP_OSPF_RTYPE_SHAM,"MPLS-VPN Sham" },
|
|
{ 0, NULL },
|
|
};
|
|
|
|
static struct tok bgp_l2vpn_encaps_values[] = {
|
|
{ 0, "Reserved"},
|
|
{ 1, "Frame Relay"},
|
|
{ 2, "ATM AAL5 VCC transport"},
|
|
{ 3, "ATM transparent cell transport"},
|
|
{ 4, "Ethernet VLAN"},
|
|
{ 5, "Ethernet"},
|
|
{ 6, "Cisco-HDLC"},
|
|
{ 7, "PPP"},
|
|
{ 8, "CEM"},
|
|
{ 9, "ATM VCC cell transport"},
|
|
{ 10, "ATM VPC cell transport"},
|
|
{ 11, "MPLS"},
|
|
{ 12, "VPLS"},
|
|
{ 64, "IP-interworking"},
|
|
{ 0, NULL},
|
|
};
|
|
|
|
static int
|
|
decode_prefix4(const u_char *pptr, char *buf, u_int buflen)
|
|
{
|
|
struct in_addr addr;
|
|
u_int plen;
|
|
|
|
TCHECK(pptr[0]);
|
|
plen = pptr[0];
|
|
if (32 < plen)
|
|
return -1;
|
|
|
|
memset(&addr, 0, sizeof(addr));
|
|
TCHECK2(pptr[1], (plen + 7) / 8);
|
|
memcpy(&addr, &pptr[1], (plen + 7) / 8);
|
|
if (plen % 8) {
|
|
((u_char *)&addr)[(plen + 7) / 8 - 1] &=
|
|
((0xff00 >> (plen % 8)) & 0xff);
|
|
}
|
|
snprintf(buf, buflen, "%s/%d", getname((u_char *)&addr), plen);
|
|
return 1 + (plen + 7) / 8;
|
|
|
|
trunc:
|
|
return -2;
|
|
}
|
|
|
|
static int
|
|
decode_labeled_prefix4(const u_char *pptr, char *buf, u_int buflen)
|
|
{
|
|
struct in_addr addr;
|
|
u_int plen;
|
|
|
|
TCHECK(pptr[0]);
|
|
plen = pptr[0]; /* get prefix length */
|
|
|
|
/* this is one of the weirdnesses of rfc3107
|
|
the label length (actually the label + COS bits)
|
|
is added to the prefix length;
|
|
we also do only read out just one label -
|
|
there is no real application for advertisement of
|
|
stacked labels in a a single BGP message
|
|
*/
|
|
|
|
plen-=24; /* adjust prefixlen - labellength */
|
|
|
|
if (32 < plen)
|
|
return -1;
|
|
|
|
memset(&addr, 0, sizeof(addr));
|
|
TCHECK2(pptr[4], (plen + 7) / 8);
|
|
memcpy(&addr, &pptr[4], (plen + 7) / 8);
|
|
if (plen % 8) {
|
|
((u_char *)&addr)[(plen + 7) / 8 - 1] &=
|
|
((0xff00 >> (plen % 8)) & 0xff);
|
|
}
|
|
/* the label may get offsetted by 4 bits so lets shift it right */
|
|
snprintf(buf, buflen, "%s/%d, label:%u %s",
|
|
getname((u_char *)&addr),
|
|
plen,
|
|
EXTRACT_24BITS(pptr+1)>>4,
|
|
((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
|
|
|
|
return 4 + (plen + 7) / 8;
|
|
|
|
trunc:
|
|
return -2;
|
|
}
|
|
|
|
/* RDs and RTs share the same semantics
|
|
* we use bgp_vpn_rd_print for
|
|
* printing route targets inside a NLRI */
|
|
static char *
|
|
bgp_vpn_rd_print (const u_char *pptr) {
|
|
|
|
/* allocate space for the following string
|
|
* xxx.xxx.xxx.xxx:xxxxx
|
|
* 21 bytes plus one termination byte */
|
|
static char rd[22];
|
|
char *pos = rd;
|
|
|
|
/* ok lets load the RD format */
|
|
switch (EXTRACT_16BITS(pptr)) {
|
|
|
|
/* AS:IP-address fmt*/
|
|
case 0:
|
|
snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u.%u.%u.%u",
|
|
EXTRACT_16BITS(pptr+2), *(pptr+4), *(pptr+5), *(pptr+6), *(pptr+7));
|
|
break;
|
|
/* IP-address:AS fmt*/
|
|
|
|
case 1:
|
|
snprintf(pos, sizeof(rd) - (pos - rd), "%u.%u.%u.%u:%u",
|
|
*(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
|
|
break;
|
|
|
|
/* 4-byte-AS:number fmt*/
|
|
case 2:
|
|
snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u",
|
|
EXTRACT_32BITS(pptr+2), EXTRACT_16BITS(pptr+6));
|
|
break;
|
|
default:
|
|
snprintf(pos, sizeof(rd) - (pos - rd), "unknown RD format");
|
|
break;
|
|
}
|
|
pos += strlen(pos);
|
|
*(pos) = '\0';
|
|
return (rd);
|
|
}
|
|
|
|
static int
|
|
decode_rt_routing_info(const u_char *pptr, char *buf, u_int buflen)
|
|
{
|
|
u_int8_t route_target[8];
|
|
u_int plen;
|
|
|
|
TCHECK(pptr[0]);
|
|
plen = pptr[0]; /* get prefix length */
|
|
|
|
plen-=32; /* adjust prefix length */
|
|
|
|
if (0 < plen)
|
|
return -1;
|
|
|
|
memset(&route_target, 0, sizeof(route_target));
|
|
TCHECK2(pptr[1], (plen + 7) / 8);
|
|
memcpy(&route_target, &pptr[1], (plen + 7) / 8);
|
|
if (plen % 8) {
|
|
((u_char *)&route_target)[(plen + 7) / 8 - 1] &=
|
|
((0xff00 >> (plen % 8)) & 0xff);
|
|
}
|
|
snprintf(buf, buflen, "origin AS: %u, route target %s",
|
|
EXTRACT_32BITS(pptr+1),
|
|
bgp_vpn_rd_print((u_char *)&route_target));
|
|
|
|
return 5 + (plen + 7) / 8;
|
|
|
|
trunc:
|
|
return -2;
|
|
}
|
|
|
|
static int
|
|
decode_labeled_vpn_prefix4(const u_char *pptr, char *buf, u_int buflen)
|
|
{
|
|
struct in_addr addr;
|
|
u_int plen;
|
|
|
|
TCHECK(pptr[0]);
|
|
plen = pptr[0]; /* get prefix length */
|
|
|
|
plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
|
|
|
|
if (32 < plen)
|
|
return -1;
|
|
|
|
memset(&addr, 0, sizeof(addr));
|
|
TCHECK2(pptr[12], (plen + 7) / 8);
|
|
memcpy(&addr, &pptr[12], (plen + 7) / 8);
|
|
if (plen % 8) {
|
|
((u_char *)&addr)[(plen + 7) / 8 - 1] &=
|
|
((0xff00 >> (plen % 8)) & 0xff);
|
|
}
|
|
/* the label may get offsetted by 4 bits so lets shift it right */
|
|
snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
|
|
bgp_vpn_rd_print(pptr+4),
|
|
getname((u_char *)&addr),
|
|
plen,
|
|
EXTRACT_24BITS(pptr+1)>>4,
|
|
((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
|
|
|
|
return 12 + (plen + 7) / 8;
|
|
|
|
trunc:
|
|
return -2;
|
|
}
|
|
|
|
static int
|
|
decode_labeled_vpn_l2(const u_char *pptr, char *buf, u_int buflen)
|
|
{
|
|
int plen,tlen,strlen,tlv_type,tlv_len,ttlv_len;
|
|
|
|
TCHECK2(pptr[0], 2);
|
|
plen=EXTRACT_16BITS(pptr);
|
|
tlen=plen;
|
|
pptr+=2;
|
|
TCHECK2(pptr[0],15);
|
|
strlen=snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u",
|
|
bgp_vpn_rd_print(pptr),
|
|
EXTRACT_16BITS(pptr+8),
|
|
EXTRACT_16BITS(pptr+10),
|
|
EXTRACT_24BITS(pptr+12)>>4); /* the label is offsetted by 4 bits so lets shift it right */
|
|
pptr+=15;
|
|
tlen-=15;
|
|
|
|
/* ok now the variable part - lets read out TLVs*/
|
|
while (tlen>0) {
|
|
if (tlen < 3)
|
|
return -1;
|
|
TCHECK2(pptr[0], 3);
|
|
tlv_type=*pptr++;
|
|
tlv_len=EXTRACT_16BITS(pptr);
|
|
ttlv_len=tlv_len;
|
|
pptr+=2;
|
|
|
|
switch(tlv_type) {
|
|
case 1:
|
|
strlen+=snprintf(buf+strlen,buflen-strlen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
|
|
tlv_type,
|
|
tlv_len);
|
|
ttlv_len=ttlv_len/8+1; /* how many bytes do we need to read ? */
|
|
while (ttlv_len>0) {
|
|
TCHECK(pptr[0]);
|
|
strlen+=snprintf(buf+strlen,buflen-strlen, "%02x",*pptr++);
|
|
ttlv_len--;
|
|
}
|
|
break;
|
|
default:
|
|
snprintf(buf+strlen,buflen-strlen, "\n\t\tunknown TLV #%u, length: %u",
|
|
tlv_type,
|
|
tlv_len);
|
|
break;
|
|
}
|
|
tlen-=(tlv_len<<3); /* the tlv-length is expressed in bits so lets shift it tright */
|
|
}
|
|
return plen+2;
|
|
|
|
trunc:
|
|
return -2;
|
|
}
|
|
|
|
#ifdef INET6
|
|
static int
|
|
decode_prefix6(const u_char *pd, char *buf, u_int buflen)
|
|
{
|
|
struct in6_addr addr;
|
|
u_int plen;
|
|
|
|
TCHECK(pd[0]);
|
|
plen = pd[0];
|
|
if (128 < plen)
|
|
return -1;
|
|
|
|
memset(&addr, 0, sizeof(addr));
|
|
TCHECK2(pd[1], (plen + 7) / 8);
|
|
memcpy(&addr, &pd[1], (plen + 7) / 8);
|
|
if (plen % 8) {
|
|
addr.s6_addr[(plen + 7) / 8 - 1] &=
|
|
((0xff00 >> (plen % 8)) & 0xff);
|
|
}
|
|
snprintf(buf, buflen, "%s/%d", getname6((u_char *)&addr), plen);
|
|
return 1 + (plen + 7) / 8;
|
|
|
|
trunc:
|
|
return -2;
|
|
}
|
|
|
|
static int
|
|
decode_labeled_prefix6(const u_char *pptr, char *buf, u_int buflen)
|
|
{
|
|
struct in6_addr addr;
|
|
u_int plen;
|
|
|
|
TCHECK(pptr[0]);
|
|
plen = pptr[0]; /* get prefix length */
|
|
plen-=24; /* adjust prefixlen - labellength */
|
|
|
|
if (128 < plen)
|
|
return -1;
|
|
|
|
memset(&addr, 0, sizeof(addr));
|
|
TCHECK2(pptr[4], (plen + 7) / 8);
|
|
memcpy(&addr, &pptr[4], (plen + 7) / 8);
|
|
if (plen % 8) {
|
|
addr.s6_addr[(plen + 7) / 8 - 1] &=
|
|
((0xff00 >> (plen % 8)) & 0xff);
|
|
}
|
|
/* the label may get offsetted by 4 bits so lets shift it right */
|
|
snprintf(buf, buflen, "%s/%d, label:%u %s",
|
|
getname6((u_char *)&addr),
|
|
plen,
|
|
EXTRACT_24BITS(pptr+1)>>4,
|
|
((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
|
|
|
|
return 4 + (plen + 7) / 8;
|
|
|
|
trunc:
|
|
return -2;
|
|
}
|
|
|
|
static int
|
|
decode_labeled_vpn_prefix6(const u_char *pptr, char *buf, u_int buflen)
|
|
{
|
|
struct in6_addr addr;
|
|
u_int plen;
|
|
|
|
TCHECK(pptr[0]);
|
|
plen = pptr[0]; /* get prefix length */
|
|
|
|
plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
|
|
|
|
if (128 < plen)
|
|
return -1;
|
|
|
|
memset(&addr, 0, sizeof(addr));
|
|
TCHECK2(pptr[12], (plen + 7) / 8);
|
|
memcpy(&addr, &pptr[12], (plen + 7) / 8);
|
|
if (plen % 8) {
|
|
addr.s6_addr[(plen + 7) / 8 - 1] &=
|
|
((0xff00 >> (plen % 8)) & 0xff);
|
|
}
|
|
/* the label may get offsetted by 4 bits so lets shift it right */
|
|
snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
|
|
bgp_vpn_rd_print(pptr+4),
|
|
getname6((u_char *)&addr),
|
|
plen,
|
|
EXTRACT_24BITS(pptr+1)>>4,
|
|
((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
|
|
|
|
return 12 + (plen + 7) / 8;
|
|
|
|
trunc:
|
|
return -2;
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len)
|
|
{
|
|
int i;
|
|
u_int16_t af;
|
|
u_int8_t safi, snpa;
|
|
union { /* copy buffer for bandwidth values */
|
|
float f;
|
|
u_int32_t i;
|
|
} bw;
|
|
int advance;
|
|
int tlen;
|
|
const u_char *tptr;
|
|
char buf[MAXHOSTNAMELEN + 100];
|
|
|
|
tptr = pptr;
|
|
tlen=len;
|
|
|
|
switch (attr->bgpa_type) {
|
|
case BGPTYPE_ORIGIN:
|
|
if (len != 1)
|
|
printf("invalid len");
|
|
else {
|
|
TCHECK(*tptr);
|
|
printf("%s", tok2str(bgp_origin_values, "Unknown Origin Typecode", tptr[0]));
|
|
}
|
|
break;
|
|
case BGPTYPE_AS_PATH:
|
|
if (len % 2) {
|
|
printf("invalid len");
|
|
break;
|
|
}
|
|
if (!len) {
|
|
printf("empty");
|
|
break;
|
|
}
|
|
|
|
while (tptr < pptr + len) {
|
|
TCHECK(tptr[0]);
|
|
printf("%s", tok2str(bgp_as_path_segment_open_values, "?", tptr[0]));
|
|
for (i = 0; i < tptr[1] * 2; i += 2) {
|
|
TCHECK2(tptr[2 + i], 2);
|
|
printf("%u ", EXTRACT_16BITS(&tptr[2 + i]));
|
|
}
|
|
TCHECK(tptr[0]);
|
|
printf("%s", tok2str(bgp_as_path_segment_close_values, "?", tptr[0]));
|
|
TCHECK(tptr[1]);
|
|
tptr += 2 + tptr[1] * 2;
|
|
}
|
|
break;
|
|
case BGPTYPE_NEXT_HOP:
|
|
if (len != 4)
|
|
printf("invalid len");
|
|
else {
|
|
TCHECK2(tptr[0], 4);
|
|
printf("%s", getname(tptr));
|
|
}
|
|
break;
|
|
case BGPTYPE_MULTI_EXIT_DISC:
|
|
case BGPTYPE_LOCAL_PREF:
|
|
if (len != 4)
|
|
printf("invalid len");
|
|
else {
|
|
TCHECK2(tptr[0], 4);
|
|
printf("%u", EXTRACT_32BITS(tptr));
|
|
}
|
|
break;
|
|
case BGPTYPE_ATOMIC_AGGREGATE:
|
|
if (len != 0)
|
|
printf("invalid len");
|
|
break;
|
|
case BGPTYPE_AGGREGATOR:
|
|
if (len != 6) {
|
|
printf("invalid len");
|
|
break;
|
|
}
|
|
TCHECK2(tptr[0], 6);
|
|
printf(" AS #%u, origin %s", EXTRACT_16BITS(tptr),
|
|
getname(tptr + 2));
|
|
break;
|
|
case BGPTYPE_COMMUNITIES:
|
|
if (len % 4) {
|
|
printf("invalid len");
|
|
break;
|
|
}
|
|
while (tlen>0) {
|
|
u_int32_t comm;
|
|
TCHECK2(tptr[0], 4);
|
|
comm = EXTRACT_32BITS(tptr);
|
|
switch (comm) {
|
|
case BGP_COMMUNITY_NO_EXPORT:
|
|
printf(" NO_EXPORT");
|
|
break;
|
|
case BGP_COMMUNITY_NO_ADVERT:
|
|
printf(" NO_ADVERTISE");
|
|
break;
|
|
case BGP_COMMUNITY_NO_EXPORT_SUBCONFED:
|
|
printf(" NO_EXPORT_SUBCONFED");
|
|
break;
|
|
default:
|
|
printf("%u:%u%s",
|
|
(comm >> 16) & 0xffff,
|
|
comm & 0xffff,
|
|
(tlen>4) ? ", " : "");
|
|
break;
|
|
}
|
|
tlen -=4;
|
|
tptr +=4;
|
|
}
|
|
break;
|
|
case BGPTYPE_ORIGINATOR_ID:
|
|
if (len != 4) {
|
|
printf("invalid len");
|
|
break;
|
|
}
|
|
TCHECK2(tptr[0], 4);
|
|
printf("%s",getname(tptr));
|
|
break;
|
|
case BGPTYPE_CLUSTER_LIST:
|
|
if (len % 4) {
|
|
printf("invalid len");
|
|
break;
|
|
}
|
|
while (tlen>0) {
|
|
TCHECK2(tptr[0], 4);
|
|
printf("%s%s",
|
|
getname(tptr),
|
|
(tlen>4) ? ", " : "");
|
|
tlen -=4;
|
|
tptr +=4;
|
|
}
|
|
break;
|
|
case BGPTYPE_MP_REACH_NLRI:
|
|
TCHECK2(tptr[0], 3);
|
|
af = EXTRACT_16BITS(tptr);
|
|
safi = tptr[2];
|
|
|
|
printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
|
|
tok2str(bgp_afi_values, "Unknown AFI", af),
|
|
af,
|
|
(safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
|
|
tok2str(bgp_safi_values, "Unknown SAFI", safi),
|
|
safi);
|
|
|
|
if (af == AFNUM_INET || af==AFNUM_L2VPN)
|
|
;
|
|
#ifdef INET6
|
|
else if (af == AFNUM_INET6)
|
|
;
|
|
#endif
|
|
else {
|
|
printf("\n\t no AFI %u decoder",af);
|
|
if (vflag <= 1)
|
|
print_unknown_data(tptr,"\n\t ",tlen);
|
|
break;
|
|
}
|
|
|
|
tptr +=3;
|
|
|
|
TCHECK(tptr[0]);
|
|
tlen = tptr[0];
|
|
tptr++;
|
|
|
|
if (tlen) {
|
|
printf("\n\t nexthop: ");
|
|
while (tlen > 0) {
|
|
switch (af) {
|
|
case AFNUM_INET:
|
|
switch(safi) {
|
|
case SAFNUM_UNICAST:
|
|
case SAFNUM_MULTICAST:
|
|
case SAFNUM_UNIMULTICAST:
|
|
case SAFNUM_LABUNICAST:
|
|
case SAFNUM_RT_ROUTING_INFO:
|
|
if (tlen < (int)sizeof(struct in_addr)) {
|
|
printf("invalid len");
|
|
tlen = 0;
|
|
} else {
|
|
TCHECK2(tptr[0], sizeof(struct in_addr));
|
|
printf("%s",getname(tptr));
|
|
tlen -= sizeof(struct in_addr);
|
|
tptr += sizeof(struct in_addr);
|
|
}
|
|
break;
|
|
case SAFNUM_VPNUNICAST:
|
|
case SAFNUM_VPNMULTICAST:
|
|
case SAFNUM_VPNUNIMULTICAST:
|
|
if (tlen < (int)(sizeof(struct in_addr)+BGP_VPN_RD_LEN)) {
|
|
printf("invalid len");
|
|
tlen = 0;
|
|
} else {
|
|
TCHECK2(tptr[0], sizeof(struct in_addr)+BGP_VPN_RD_LEN);
|
|
printf("RD: %s, %s",
|
|
bgp_vpn_rd_print(tptr),
|
|
getname(tptr+BGP_VPN_RD_LEN));
|
|
tlen -= (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
|
|
tptr += (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
|
|
}
|
|
break;
|
|
default:
|
|
TCHECK2(tptr[0], tlen);
|
|
printf("no SAFI %u decoder",safi);
|
|
if (vflag <= 1)
|
|
print_unknown_data(tptr,"\n\t ",tlen);
|
|
tptr += tlen;
|
|
tlen = 0;
|
|
break;
|
|
}
|
|
break;
|
|
#ifdef INET6
|
|
case AFNUM_INET6:
|
|
switch(safi) {
|
|
case SAFNUM_UNICAST:
|
|
case SAFNUM_MULTICAST:
|
|
case SAFNUM_UNIMULTICAST:
|
|
case SAFNUM_LABUNICAST:
|
|
case SAFNUM_RT_ROUTING_INFO:
|
|
if (tlen < (int)sizeof(struct in6_addr)) {
|
|
printf("invalid len");
|
|
tlen = 0;
|
|
} else {
|
|
TCHECK2(tptr[0], sizeof(struct in6_addr));
|
|
printf("%s", getname6(tptr));
|
|
tlen -= sizeof(struct in6_addr);
|
|
tptr += sizeof(struct in6_addr);
|
|
}
|
|
break;
|
|
case SAFNUM_VPNUNICAST:
|
|
case SAFNUM_VPNMULTICAST:
|
|
case SAFNUM_VPNUNIMULTICAST:
|
|
if (tlen < (int)(sizeof(struct in6_addr)+BGP_VPN_RD_LEN)) {
|
|
printf("invalid len");
|
|
tlen = 0;
|
|
} else {
|
|
TCHECK2(tptr[0], sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
|
|
printf("RD: %s, %s",
|
|
bgp_vpn_rd_print(tptr),
|
|
getname6(tptr+BGP_VPN_RD_LEN));
|
|
tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
|
|
tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
|
|
}
|
|
break;
|
|
default:
|
|
TCHECK2(tptr[0], tlen);
|
|
printf("no SAFI %u decoder",safi);
|
|
if (vflag <= 1)
|
|
print_unknown_data(tptr,"\n\t ",tlen);
|
|
tptr += tlen;
|
|
tlen = 0;
|
|
break;
|
|
}
|
|
break;
|
|
#endif
|
|
case AFNUM_L2VPN:
|
|
switch(safi) {
|
|
case SAFNUM_VPNUNICAST:
|
|
case SAFNUM_VPNMULTICAST:
|
|
case SAFNUM_VPNUNIMULTICAST:
|
|
if (tlen < (int)sizeof(struct in_addr)) {
|
|
printf("invalid len");
|
|
tlen = 0;
|
|
} else {
|
|
TCHECK2(tptr[0], sizeof(struct in_addr));
|
|
printf("%s", getname(tptr));
|
|
tlen -= (sizeof(struct in_addr));
|
|
tptr += (sizeof(struct in_addr));
|
|
}
|
|
break;
|
|
default:
|
|
TCHECK2(tptr[0], tlen);
|
|
printf("no SAFI %u decoder",safi);
|
|
if (vflag <= 1)
|
|
print_unknown_data(tptr,"\n\t ",tlen);
|
|
tptr += tlen;
|
|
tlen = 0;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
TCHECK2(tptr[0], tlen);
|
|
printf("no AFI %u decoder",af);
|
|
if (vflag <= 1)
|
|
print_unknown_data(tptr,"\n\t ",tlen);
|
|
tptr += tlen;
|
|
tlen = 0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
tptr += tlen;
|
|
|
|
TCHECK(tptr[0]);
|
|
snpa = tptr[0];
|
|
tptr++;
|
|
|
|
if (snpa) {
|
|
printf("\n\t %u SNPA", snpa);
|
|
for (/*nothing*/; snpa > 0; snpa--) {
|
|
TCHECK(tptr[0]);
|
|
printf("\n\t %d bytes", tptr[0]);
|
|
tptr += tptr[0] + 1;
|
|
}
|
|
} else {
|
|
printf(", no SNPA");
|
|
}
|
|
|
|
while (len - (tptr - pptr) > 0) {
|
|
switch (af) {
|
|
case AFNUM_INET:
|
|
switch (safi) {
|
|
case SAFNUM_UNICAST:
|
|
case SAFNUM_MULTICAST:
|
|
case SAFNUM_UNIMULTICAST:
|
|
advance = decode_prefix4(tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
printf("\n\t (illegal prefix length)");
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
printf("\n\t %s", buf);
|
|
break;
|
|
case SAFNUM_LABUNICAST:
|
|
advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
printf("\n\t (illegal prefix length)");
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
printf("\n\t %s", buf);
|
|
break;
|
|
case SAFNUM_VPNUNICAST:
|
|
case SAFNUM_VPNMULTICAST:
|
|
case SAFNUM_VPNUNIMULTICAST:
|
|
advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
printf("\n\t (illegal prefix length)");
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
printf("\n\t %s", buf);
|
|
break;
|
|
case SAFNUM_RT_ROUTING_INFO:
|
|
advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
printf("\n\t (illegal prefix length)");
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
printf("\n\t %s", buf);
|
|
break;
|
|
default:
|
|
TCHECK2(*(tptr-3),tlen);
|
|
printf("\n\t no SAFI %u decoder",safi);
|
|
if (vflag <= 1)
|
|
print_unknown_data(tptr-3,"\n\t ",tlen);
|
|
advance = 0;
|
|
tptr = pptr + len;
|
|
break;
|
|
}
|
|
break;
|
|
#ifdef INET6
|
|
case AFNUM_INET6:
|
|
switch (safi) {
|
|
case SAFNUM_UNICAST:
|
|
case SAFNUM_MULTICAST:
|
|
case SAFNUM_UNIMULTICAST:
|
|
advance = decode_prefix6(tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
printf("\n\t (illegal prefix length)");
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
printf("\n\t %s", buf);
|
|
break;
|
|
case SAFNUM_LABUNICAST:
|
|
advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
printf("\n\t (illegal prefix length)");
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
printf("\n\t %s", buf);
|
|
break;
|
|
case SAFNUM_VPNUNICAST:
|
|
case SAFNUM_VPNMULTICAST:
|
|
case SAFNUM_VPNUNIMULTICAST:
|
|
advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
printf("\n\t (illegal prefix length)");
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
printf("\n\t %s", buf);
|
|
break;
|
|
case SAFNUM_RT_ROUTING_INFO:
|
|
advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
printf("\n\t (illegal prefix length)");
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
printf("\n\t %s", buf);
|
|
break;
|
|
default:
|
|
TCHECK2(*(tptr-3),tlen);
|
|
printf("\n\t no SAFI %u decoder ",safi);
|
|
if (vflag <= 1)
|
|
print_unknown_data(tptr-3,"\n\t ",tlen);
|
|
advance = 0;
|
|
tptr = pptr + len;
|
|
break;
|
|
}
|
|
break;
|
|
#endif
|
|
case AFNUM_L2VPN:
|
|
switch(safi) {
|
|
case SAFNUM_VPNUNICAST:
|
|
case SAFNUM_VPNMULTICAST:
|
|
case SAFNUM_VPNUNIMULTICAST:
|
|
advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
printf("\n\t (illegal length)");
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
printf("\n\t %s", buf);
|
|
break;
|
|
default:
|
|
TCHECK2(*tptr,tlen);
|
|
printf("no SAFI %u decoder",safi);
|
|
if (vflag <= 1)
|
|
print_unknown_data(tptr,"\n\t ",tlen);
|
|
advance = 0;
|
|
tptr = pptr + len;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
|
|
default:
|
|
TCHECK2(*(tptr-3),tlen);
|
|
printf("\n\t no AFI %u decoder ",af);
|
|
if (vflag <= 1)
|
|
print_unknown_data(tptr-3,"\n\t ",tlen);
|
|
advance = 0;
|
|
tptr = pptr + len;
|
|
break;
|
|
}
|
|
tptr += advance;
|
|
}
|
|
break;
|
|
|
|
case BGPTYPE_MP_UNREACH_NLRI:
|
|
TCHECK2(tptr[0], 3);
|
|
af = EXTRACT_16BITS(tptr);
|
|
safi = tptr[2];
|
|
|
|
printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
|
|
tok2str(bgp_afi_values, "Unknown AFI", af),
|
|
af,
|
|
(safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
|
|
tok2str(bgp_safi_values, "Unknown SAFI", safi),
|
|
safi);
|
|
|
|
tptr += 3;
|
|
|
|
while (len - (tptr - pptr) > 0) {
|
|
switch (af) {
|
|
case AFNUM_INET:
|
|
switch (safi) {
|
|
case SAFNUM_UNICAST:
|
|
case SAFNUM_MULTICAST:
|
|
case SAFNUM_UNIMULTICAST:
|
|
advance = decode_prefix4(tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
printf("\n\t (illegal prefix length)");
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
printf("\n\t %s", buf);
|
|
break;
|
|
case SAFNUM_LABUNICAST:
|
|
advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
printf("\n\t (illegal prefix length)");
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
printf("\n\t %s", buf);
|
|
break;
|
|
case SAFNUM_VPNUNICAST:
|
|
case SAFNUM_VPNMULTICAST:
|
|
case SAFNUM_VPNUNIMULTICAST:
|
|
advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
printf("\n\t (illegal prefix length)");
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
printf("\n\t %s", buf);
|
|
break;
|
|
default:
|
|
TCHECK2(*(tptr-3),tlen);
|
|
printf("\n\t no SAFI %u decoder",safi);
|
|
if (vflag <= 1)
|
|
print_unknown_data(tptr-3,"\n\t ",tlen);
|
|
advance = 0;
|
|
tptr = pptr + len;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
#ifdef INET6
|
|
case AFNUM_INET6:
|
|
switch (safi) {
|
|
case SAFNUM_UNICAST:
|
|
case SAFNUM_MULTICAST:
|
|
case SAFNUM_UNIMULTICAST:
|
|
advance = decode_prefix6(tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
printf("\n\t (illegal prefix length)");
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
printf("\n\t %s", buf);
|
|
break;
|
|
case SAFNUM_LABUNICAST:
|
|
advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
printf("\n\t (illegal prefix length)");
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
printf("\n\t %s", buf);
|
|
break;
|
|
case SAFNUM_VPNUNICAST:
|
|
case SAFNUM_VPNMULTICAST:
|
|
case SAFNUM_VPNUNIMULTICAST:
|
|
advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
printf("\n\t (illegal prefix length)");
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
printf("\n\t %s", buf);
|
|
break;
|
|
default:
|
|
TCHECK2(*(tptr-3),tlen);
|
|
printf("\n\t no SAFI %u decoder",safi);
|
|
if (vflag <= 1)
|
|
print_unknown_data(tptr-3,"\n\t ",tlen);
|
|
advance = 0;
|
|
tptr = pptr + len;
|
|
break;
|
|
}
|
|
break;
|
|
#endif
|
|
|
|
case AFNUM_L2VPN:
|
|
switch(safi) {
|
|
case SAFNUM_VPNUNICAST:
|
|
case SAFNUM_VPNMULTICAST:
|
|
case SAFNUM_VPNUNIMULTICAST:
|
|
advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
printf("\n\t (illegal length)");
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
printf("\n\t %s", buf);
|
|
break;
|
|
default:
|
|
TCHECK2(*(tptr-3),tlen);
|
|
printf("no SAFI %u decoder",safi);
|
|
if (vflag <= 1)
|
|
print_unknown_data(tptr-3,"\n\t ",tlen);
|
|
advance = 0;
|
|
tptr = pptr + len;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
TCHECK2(*(tptr-3),tlen);
|
|
printf("\n\t no AFI %u decoder",af);
|
|
if (vflag <= 1)
|
|
print_unknown_data(tptr-3,"\n\t ",tlen);
|
|
advance = 0;
|
|
tptr = pptr + len;
|
|
break;
|
|
}
|
|
|
|
tptr += advance;
|
|
}
|
|
break;
|
|
case BGPTYPE_EXTD_COMMUNITIES:
|
|
if (len % 8) {
|
|
printf("invalid len");
|
|
break;
|
|
}
|
|
while (tlen>0) {
|
|
u_int16_t extd_comm;
|
|
|
|
TCHECK2(tptr[0], 2);
|
|
extd_comm=EXTRACT_16BITS(tptr);
|
|
|
|
printf("\n\t %s (0x%04x), Flags [%s]",
|
|
tok2str(bgp_extd_comm_subtype_values, "unknown extd community typecode", extd_comm),
|
|
extd_comm,
|
|
bittok2str(bgp_extd_comm_flag_values, "none", extd_comm));
|
|
|
|
TCHECK2(*(tptr+2), 6);
|
|
switch(extd_comm) {
|
|
case BGP_EXT_COM_RT_0:
|
|
case BGP_EXT_COM_RO_0:
|
|
printf(": %u:%s",
|
|
EXTRACT_16BITS(tptr+2),
|
|
getname(tptr+4));
|
|
break;
|
|
case BGP_EXT_COM_RT_1:
|
|
case BGP_EXT_COM_RO_1:
|
|
printf(": %s:%u",
|
|
getname(tptr+2),
|
|
EXTRACT_16BITS(tptr+6));
|
|
break;
|
|
case BGP_EXT_COM_RT_2:
|
|
case BGP_EXT_COM_RO_2:
|
|
printf(": %u:%u",
|
|
EXTRACT_32BITS(tptr+2),
|
|
EXTRACT_16BITS(tptr+6));
|
|
break;
|
|
case BGP_EXT_COM_LINKBAND:
|
|
bw.i = EXTRACT_32BITS(tptr+2);
|
|
printf(": bandwidth: %.3f Mbps",
|
|
bw.f*8/1000000);
|
|
break;
|
|
case BGP_EXT_COM_VPN_ORIGIN:
|
|
case BGP_EXT_COM_VPN_ORIGIN2:
|
|
case BGP_EXT_COM_VPN_ORIGIN3:
|
|
case BGP_EXT_COM_VPN_ORIGIN4:
|
|
case BGP_EXT_COM_OSPF_RID:
|
|
case BGP_EXT_COM_OSPF_RID2:
|
|
printf("%s", getname(tptr+2));
|
|
break;
|
|
case BGP_EXT_COM_OSPF_RTYPE:
|
|
case BGP_EXT_COM_OSPF_RTYPE2:
|
|
printf(": area:%s, router-type:%s, metric-type:%s%s",
|
|
getname(tptr+2),
|
|
tok2str(bgp_extd_comm_ospf_rtype_values,
|
|
"unknown (0x%02x)",
|
|
*(tptr+6)),
|
|
(*(tptr+7) & BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "",
|
|
(*(tptr+6) == (BGP_OSPF_RTYPE_EXT ||BGP_OSPF_RTYPE_NSSA )) ? "E1" : "");
|
|
break;
|
|
case BGP_EXT_COM_L2INFO:
|
|
printf(": %s Control Flags [0x%02x]:MTU %u",
|
|
tok2str(bgp_l2vpn_encaps_values,
|
|
"unknown encaps",
|
|
*(tptr+2)),
|
|
*(tptr+3),
|
|
EXTRACT_16BITS(tptr+4));
|
|
break;
|
|
default:
|
|
print_unknown_data(tptr,"\n\t ",8);
|
|
break;
|
|
}
|
|
tlen -=8;
|
|
tptr +=8;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
TCHECK2(*pptr,len);
|
|
printf("\n\t no Attribute %u decoder",attr->bgpa_type); /* we have no decoder for the attribute */
|
|
if (vflag <= 1)
|
|
print_unknown_data(pptr,"\n\t ",len);
|
|
break;
|
|
}
|
|
if (vflag > 1 && len) /* omit zero length attributes*/
|
|
print_unknown_data(pptr,"\n\t ",len);
|
|
return 1;
|
|
|
|
trunc:
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
bgp_open_print(const u_char *dat, int length)
|
|
{
|
|
struct bgp_open bgpo;
|
|
struct bgp_opt bgpopt;
|
|
int hlen;
|
|
const u_char *opt;
|
|
int i,cap_type,cap_len,tcap_len,cap_offset;
|
|
|
|
TCHECK2(dat[0], BGP_OPEN_SIZE);
|
|
memcpy(&bgpo, dat, BGP_OPEN_SIZE);
|
|
hlen = ntohs(bgpo.bgpo_len);
|
|
|
|
printf("\n\t Version %d, ", bgpo.bgpo_version);
|
|
printf("my AS %u, ", ntohs(bgpo.bgpo_myas));
|
|
printf("Holdtime %us, ", ntohs(bgpo.bgpo_holdtime));
|
|
printf("ID %s", getname((u_char *)&bgpo.bgpo_id));
|
|
printf("\n\t Optional parameters, length: %u", bgpo.bgpo_optlen);
|
|
|
|
/* some little sanity checking */
|
|
if (length < bgpo.bgpo_optlen+BGP_OPEN_SIZE)
|
|
return;
|
|
|
|
/* ugly! */
|
|
opt = &((const struct bgp_open *)dat)->bgpo_optlen;
|
|
opt++;
|
|
|
|
i = 0;
|
|
while (i < bgpo.bgpo_optlen) {
|
|
TCHECK2(opt[i], BGP_OPT_SIZE);
|
|
memcpy(&bgpopt, &opt[i], BGP_OPT_SIZE);
|
|
if (i + 2 + bgpopt.bgpopt_len > bgpo.bgpo_optlen) {
|
|
printf("\n\t Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len);
|
|
break;
|
|
}
|
|
|
|
printf("\n\t Option %s (%u), length: %u",
|
|
tok2str(bgp_opt_values,"Unknown", bgpopt.bgpopt_type),
|
|
bgpopt.bgpopt_type,
|
|
bgpopt.bgpopt_len);
|
|
|
|
/* now lets decode the options we know*/
|
|
switch(bgpopt.bgpopt_type) {
|
|
case BGP_OPT_CAP:
|
|
cap_type=opt[i+BGP_OPT_SIZE];
|
|
cap_len=opt[i+BGP_OPT_SIZE+1];
|
|
tcap_len=cap_len;
|
|
printf("\n\t %s, length: %u",
|
|
tok2str(bgp_capcode_values,"Unknown", cap_type),
|
|
cap_len);
|
|
switch(cap_type) {
|
|
case BGP_CAPCODE_MP:
|
|
printf("\n\t\tAFI %s (%u), SAFI %s (%u)",
|
|
tok2str(bgp_afi_values,"Unknown", EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2)),
|
|
EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
|
|
tok2str(bgp_safi_values,"Unknown", opt[i+BGP_OPT_SIZE+5]),
|
|
opt[i+BGP_OPT_SIZE+5]);
|
|
break;
|
|
case BGP_CAPCODE_RESTART:
|
|
printf("\n\t\tRestart Flags: [%s], Restart Time %us",
|
|
((opt[i+BGP_OPT_SIZE+2])&0x80) ? "R" : "none",
|
|
EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2)&0xfff);
|
|
tcap_len-=2;
|
|
cap_offset=4;
|
|
while(tcap_len>=4) {
|
|
printf("\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s",
|
|
tok2str(bgp_afi_values,"Unknown", EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset)),
|
|
EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
|
|
tok2str(bgp_safi_values,"Unknown", opt[i+BGP_OPT_SIZE+cap_offset+2]),
|
|
opt[i+BGP_OPT_SIZE+cap_offset+2],
|
|
((opt[i+BGP_OPT_SIZE+cap_offset+3])&0x80) ? "yes" : "no" );
|
|
tcap_len-=4;
|
|
cap_offset+=4;
|
|
}
|
|
break;
|
|
case BGP_CAPCODE_RR:
|
|
case BGP_CAPCODE_RR_CISCO:
|
|
break;
|
|
default:
|
|
printf("\n\t\tno decoder for Capability %u",
|
|
cap_type);
|
|
if (vflag <= 1)
|
|
print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
|
|
break;
|
|
}
|
|
if (vflag > 1)
|
|
print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
|
|
break;
|
|
case BGP_OPT_AUTH:
|
|
default:
|
|
printf("\n\t no decoder for option %u",
|
|
bgpopt.bgpopt_type);
|
|
break;
|
|
}
|
|
|
|
i += BGP_OPT_SIZE + bgpopt.bgpopt_len;
|
|
}
|
|
return;
|
|
trunc:
|
|
printf("[|BGP]");
|
|
}
|
|
|
|
static void
|
|
bgp_update_print(const u_char *dat, int length)
|
|
{
|
|
struct bgp bgp;
|
|
struct bgp_attr bgpa;
|
|
int hlen;
|
|
const u_char *p;
|
|
int len;
|
|
int i;
|
|
|
|
TCHECK2(dat[0], BGP_SIZE);
|
|
memcpy(&bgp, dat, BGP_SIZE);
|
|
hlen = ntohs(bgp.bgp_len);
|
|
p = dat + BGP_SIZE; /*XXX*/
|
|
|
|
/* Unfeasible routes */
|
|
len = EXTRACT_16BITS(p);
|
|
if (len) {
|
|
/*
|
|
* Without keeping state from the original NLRI message,
|
|
* it's not possible to tell if this a v4 or v6 route,
|
|
* so only try to decode it if we're not v6 enabled.
|
|
*/
|
|
#ifdef INET6
|
|
printf("\n\t Withdrawn routes: %d bytes", len);
|
|
#else
|
|
char buf[MAXHOSTNAMELEN + 100];
|
|
int wpfx;
|
|
|
|
TCHECK2(p[2], len);
|
|
i = 2;
|
|
|
|
printf("\n\t Withdrawn routes:");
|
|
|
|
while(i < 2 + len) {
|
|
wpfx = decode_prefix4(&p[i], buf, sizeof(buf));
|
|
if (wpfx == -1) {
|
|
printf("\n\t (illegal prefix length)");
|
|
break;
|
|
} else if (wpfx == -2)
|
|
goto trunc;
|
|
else {
|
|
i += wpfx;
|
|
printf("\n\t %s", buf);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
p += 2 + len;
|
|
|
|
TCHECK2(p[0], 2);
|
|
len = EXTRACT_16BITS(p);
|
|
if (len) {
|
|
/* do something more useful!*/
|
|
i = 2;
|
|
while (i < 2 + len) {
|
|
int alen, aoff;
|
|
|
|
TCHECK2(p[i], sizeof(bgpa));
|
|
memcpy(&bgpa, &p[i], sizeof(bgpa));
|
|
alen = bgp_attr_len(&bgpa);
|
|
aoff = bgp_attr_off(&bgpa);
|
|
|
|
printf("\n\t %s (%u), length: %u",
|
|
tok2str(bgp_attr_values, "Unknown Attribute", bgpa.bgpa_type),
|
|
bgpa.bgpa_type,
|
|
alen);
|
|
|
|
if (bgpa.bgpa_flags) {
|
|
printf(", Flags [%s%s%s%s",
|
|
bgpa.bgpa_flags & 0x80 ? "O" : "",
|
|
bgpa.bgpa_flags & 0x40 ? "T" : "",
|
|
bgpa.bgpa_flags & 0x20 ? "P" : "",
|
|
bgpa.bgpa_flags & 0x10 ? "E" : "");
|
|
if (bgpa.bgpa_flags & 0xf)
|
|
printf("+%x", bgpa.bgpa_flags & 0xf);
|
|
printf("]: ");
|
|
}
|
|
if (!bgp_attr_print(&bgpa, &p[i + aoff], alen))
|
|
goto trunc;
|
|
i += aoff + alen;
|
|
}
|
|
}
|
|
p += 2 + len;
|
|
|
|
if (dat + length > p) {
|
|
printf("\n\t Updated routes:");
|
|
while (dat + length > p) {
|
|
char buf[MAXHOSTNAMELEN + 100];
|
|
i = decode_prefix4(p, buf, sizeof(buf));
|
|
if (i == -1)
|
|
printf("\n\t (illegal prefix length)");
|
|
else if (i == -2)
|
|
goto trunc;
|
|
else {
|
|
printf("\n\t %s", buf);
|
|
p += i;
|
|
}
|
|
}
|
|
}
|
|
return;
|
|
trunc:
|
|
printf("[|BGP]");
|
|
}
|
|
|
|
static void
|
|
bgp_notification_print(const u_char *dat, int length)
|
|
{
|
|
struct bgp_notification bgpn;
|
|
int hlen;
|
|
const u_char *tptr;
|
|
|
|
TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
|
|
memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
|
|
hlen = ntohs(bgpn.bgpn_len);
|
|
|
|
/* some little sanity checking */
|
|
if (length<BGP_NOTIFICATION_SIZE)
|
|
return;
|
|
|
|
printf(", %s (%u)",
|
|
tok2str(bgp_notify_major_values, "Unknown Error", bgpn.bgpn_major),
|
|
bgpn.bgpn_major);
|
|
|
|
switch (bgpn.bgpn_major) {
|
|
|
|
case BGP_NOTIFY_MAJOR_MSG:
|
|
printf(", subcode %s (%u)",
|
|
tok2str(bgp_notify_minor_msg_values, "Unknown", bgpn.bgpn_minor),
|
|
bgpn.bgpn_minor);
|
|
break;
|
|
case BGP_NOTIFY_MAJOR_OPEN:
|
|
printf(", subcode %s (%u)",
|
|
tok2str(bgp_notify_minor_open_values, "Unknown", bgpn.bgpn_minor),
|
|
bgpn.bgpn_minor);
|
|
break;
|
|
case BGP_NOTIFY_MAJOR_UPDATE:
|
|
printf(", subcode %s (%u)",
|
|
tok2str(bgp_notify_minor_update_values, "Unknown", bgpn.bgpn_minor),
|
|
bgpn.bgpn_minor);
|
|
break;
|
|
case BGP_NOTIFY_MAJOR_CAP:
|
|
printf(" subcode %s (%u)",
|
|
tok2str(bgp_notify_minor_cap_values, "Unknown", bgpn.bgpn_minor),
|
|
bgpn.bgpn_minor);
|
|
case BGP_NOTIFY_MAJOR_CEASE:
|
|
printf(", subcode %s (%u)",
|
|
tok2str(bgp_notify_minor_cease_values, "Unknown", bgpn.bgpn_minor),
|
|
bgpn.bgpn_minor);
|
|
|
|
/* draft-ietf-idr-cease-subcode-02 mentions optionally 7 bytes
|
|
* for the maxprefix subtype, which may contain AFI, SAFI and MAXPREFIXES
|
|
*/
|
|
if(bgpn.bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= BGP_NOTIFICATION_SIZE + 7) {
|
|
tptr = dat + BGP_NOTIFICATION_SIZE;
|
|
TCHECK2(*tptr, 7);
|
|
printf(", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
|
|
tok2str(bgp_afi_values, "Unknown", EXTRACT_16BITS(tptr)),
|
|
EXTRACT_16BITS(tptr),
|
|
tok2str(bgp_safi_values, "Unknown", *(tptr+2)),
|
|
*(tptr+2),
|
|
EXTRACT_32BITS(tptr+3));
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return;
|
|
trunc:
|
|
printf("[|BGP]");
|
|
}
|
|
|
|
static void
|
|
bgp_route_refresh_print(const u_char *pptr, int len) {
|
|
|
|
const struct bgp_route_refresh *bgp_route_refresh_header;
|
|
bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
|
|
|
|
printf("\n\t AFI %s (%u), SAFI %s (%u)",
|
|
tok2str(bgp_afi_values,"Unknown",
|
|
EXTRACT_16BITS(&bgp_route_refresh_header->afi)), /* this stinks but the compiler pads the structure weird */
|
|
EXTRACT_16BITS(&bgp_route_refresh_header->afi),
|
|
tok2str(bgp_safi_values,"Unknown",
|
|
bgp_route_refresh_header->safi),
|
|
bgp_route_refresh_header->safi);
|
|
|
|
if (vflag > 1)
|
|
print_unknown_data(pptr,"\n\t ", len);
|
|
|
|
return;
|
|
}
|
|
|
|
static int
|
|
bgp_header_print(const u_char *dat, int length)
|
|
{
|
|
struct bgp bgp;
|
|
|
|
TCHECK2(dat[0], BGP_SIZE);
|
|
memcpy(&bgp, dat, BGP_SIZE);
|
|
printf("\n\t%s Message (%u), length: %u",
|
|
tok2str(bgp_msg_values, "Unknown", bgp.bgp_type),
|
|
bgp.bgp_type,
|
|
length);
|
|
|
|
switch (bgp.bgp_type) {
|
|
case BGP_OPEN:
|
|
bgp_open_print(dat, length);
|
|
break;
|
|
case BGP_UPDATE:
|
|
bgp_update_print(dat, length);
|
|
break;
|
|
case BGP_NOTIFICATION:
|
|
bgp_notification_print(dat, length);
|
|
break;
|
|
case BGP_KEEPALIVE:
|
|
break;
|
|
case BGP_ROUTE_REFRESH:
|
|
bgp_route_refresh_print(dat, length);
|
|
break;
|
|
default:
|
|
/* we have no decoder for the BGP message */
|
|
printf("\n\t no Message %u decoder",bgp.bgp_type);
|
|
print_unknown_data(dat,"\n\t ",length);
|
|
break;
|
|
}
|
|
return 1;
|
|
trunc:
|
|
printf("[|BGP]");
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
bgp_print(const u_char *dat, int length)
|
|
{
|
|
const u_char *p;
|
|
const u_char *ep;
|
|
const u_char *start;
|
|
const u_char marker[] = {
|
|
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
|
|
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
|
|
};
|
|
struct bgp bgp;
|
|
u_int16_t hlen;
|
|
|
|
ep = dat + length;
|
|
if (snapend < dat + length)
|
|
ep = snapend;
|
|
|
|
printf(": BGP, length: %u",length);
|
|
|
|
if (vflag < 1) /* lets be less chatty */
|
|
return;
|
|
|
|
p = dat;
|
|
start = p;
|
|
while (p < snapend) {
|
|
if (!TTEST2(p[0], 1))
|
|
break;
|
|
if (p[0] != 0xff) {
|
|
p++;
|
|
continue;
|
|
}
|
|
|
|
if (!TTEST2(p[0], sizeof(marker)))
|
|
break;
|
|
if (memcmp(p, marker, sizeof(marker)) != 0) {
|
|
p++;
|
|
continue;
|
|
}
|
|
|
|
/* found BGP header */
|
|
TCHECK2(p[0], BGP_SIZE); /*XXX*/
|
|
memcpy(&bgp, p, BGP_SIZE);
|
|
|
|
if (start != p)
|
|
printf(" [|BGP]");
|
|
|
|
hlen = ntohs(bgp.bgp_len);
|
|
if (hlen < BGP_SIZE) {
|
|
printf("\n[|BGP Bogus header length %u < %u]", hlen,
|
|
BGP_SIZE);
|
|
break;
|
|
}
|
|
|
|
if (TTEST2(p[0], hlen)) {
|
|
if (!bgp_header_print(p, hlen))
|
|
return;
|
|
p += hlen;
|
|
start = p;
|
|
} else {
|
|
printf("\n[|BGP %s]", tok2str(bgp_msg_values, "Unknown Message Type",bgp.bgp_type));
|
|
break;
|
|
}
|
|
}
|
|
|
|
return;
|
|
|
|
trunc:
|
|
printf(" [|BGP]");
|
|
}
|