f49c5d523a
MFC after: 1 month
2781 lines
95 KiB
C
2781 lines
95 KiB
C
/*
|
|
* Copyright (C) 1999 WIDE Project.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the project nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* Extensively modified by Hannes Gredler (hannes@juniper.net) for more
|
|
* complete BGP support.
|
|
*/
|
|
|
|
#define NETDISSECT_REWORKED
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <tcpdump-stdinc.h>
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include "interface.h"
|
|
#include "addrtoname.h"
|
|
#include "extract.h"
|
|
#include "af.h"
|
|
#include "l2vpn.h"
|
|
|
|
struct bgp {
|
|
uint8_t bgp_marker[16];
|
|
uint16_t bgp_len;
|
|
uint8_t bgp_type;
|
|
};
|
|
#define BGP_SIZE 19 /* unaligned */
|
|
|
|
#define BGP_OPEN 1
|
|
#define BGP_UPDATE 2
|
|
#define BGP_NOTIFICATION 3
|
|
#define BGP_KEEPALIVE 4
|
|
#define BGP_ROUTE_REFRESH 5
|
|
|
|
static const struct tok bgp_msg_values[] = {
|
|
{ BGP_OPEN, "Open"},
|
|
{ BGP_UPDATE, "Update"},
|
|
{ BGP_NOTIFICATION, "Notification"},
|
|
{ BGP_KEEPALIVE, "Keepalive"},
|
|
{ BGP_ROUTE_REFRESH, "Route Refresh"},
|
|
{ 0, NULL}
|
|
};
|
|
|
|
struct bgp_open {
|
|
uint8_t bgpo_marker[16];
|
|
uint16_t bgpo_len;
|
|
uint8_t bgpo_type;
|
|
uint8_t bgpo_version;
|
|
uint16_t bgpo_myas;
|
|
uint16_t bgpo_holdtime;
|
|
uint32_t bgpo_id;
|
|
uint8_t bgpo_optlen;
|
|
/* options should follow */
|
|
};
|
|
#define BGP_OPEN_SIZE 29 /* unaligned */
|
|
|
|
struct bgp_opt {
|
|
uint8_t bgpopt_type;
|
|
uint8_t bgpopt_len;
|
|
/* variable length */
|
|
};
|
|
#define BGP_OPT_SIZE 2 /* some compilers may pad to 4 bytes */
|
|
#define BGP_CAP_HEADER_SIZE 2 /* some compilers may pad to 4 bytes */
|
|
|
|
struct bgp_notification {
|
|
uint8_t bgpn_marker[16];
|
|
uint16_t bgpn_len;
|
|
uint8_t bgpn_type;
|
|
uint8_t bgpn_major;
|
|
uint8_t bgpn_minor;
|
|
};
|
|
#define BGP_NOTIFICATION_SIZE 21 /* unaligned */
|
|
|
|
struct bgp_route_refresh {
|
|
uint8_t bgp_marker[16];
|
|
uint16_t len;
|
|
uint8_t type;
|
|
uint8_t afi[2]; /* the compiler messes this structure up */
|
|
uint8_t res; /* when doing misaligned sequences of int8 and int16 */
|
|
uint8_t safi; /* afi should be int16 - so we have to access it using */
|
|
}; /* EXTRACT_16BITS(&bgp_route_refresh->afi) (sigh) */
|
|
#define BGP_ROUTE_REFRESH_SIZE 23
|
|
|
|
#define bgp_attr_lenlen(flags, p) \
|
|
(((flags) & 0x10) ? 2 : 1)
|
|
#define bgp_attr_len(flags, p) \
|
|
(((flags) & 0x10) ? EXTRACT_16BITS(p) : *(p))
|
|
|
|
#define BGPTYPE_ORIGIN 1
|
|
#define BGPTYPE_AS_PATH 2
|
|
#define BGPTYPE_NEXT_HOP 3
|
|
#define BGPTYPE_MULTI_EXIT_DISC 4
|
|
#define BGPTYPE_LOCAL_PREF 5
|
|
#define BGPTYPE_ATOMIC_AGGREGATE 6
|
|
#define BGPTYPE_AGGREGATOR 7
|
|
#define BGPTYPE_COMMUNITIES 8 /* RFC1997 */
|
|
#define BGPTYPE_ORIGINATOR_ID 9 /* RFC1998 */
|
|
#define BGPTYPE_CLUSTER_LIST 10 /* RFC1998 */
|
|
#define BGPTYPE_DPA 11 /* draft-ietf-idr-bgp-dpa */
|
|
#define BGPTYPE_ADVERTISERS 12 /* RFC1863 */
|
|
#define BGPTYPE_RCID_PATH 13 /* RFC1863 */
|
|
#define BGPTYPE_MP_REACH_NLRI 14 /* RFC2283 */
|
|
#define BGPTYPE_MP_UNREACH_NLRI 15 /* RFC2283 */
|
|
#define BGPTYPE_EXTD_COMMUNITIES 16 /* draft-ietf-idr-bgp-ext-communities */
|
|
#define BGPTYPE_AS4_PATH 17 /* RFC4893 */
|
|
#define BGPTYPE_AGGREGATOR4 18 /* RFC4893 */
|
|
#define BGPTYPE_PMSI_TUNNEL 22 /* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */
|
|
#define BGPTYPE_ATTR_SET 128 /* draft-marques-ppvpn-ibgp */
|
|
|
|
#define BGP_MP_NLRI_MINSIZE 3 /* End of RIB Marker detection */
|
|
|
|
static const struct tok bgp_attr_values[] = {
|
|
{ BGPTYPE_ORIGIN, "Origin"},
|
|
{ BGPTYPE_AS_PATH, "AS Path"},
|
|
{ BGPTYPE_AS4_PATH, "AS4 Path"},
|
|
{ BGPTYPE_NEXT_HOP, "Next Hop"},
|
|
{ BGPTYPE_MULTI_EXIT_DISC, "Multi Exit Discriminator"},
|
|
{ BGPTYPE_LOCAL_PREF, "Local Preference"},
|
|
{ BGPTYPE_ATOMIC_AGGREGATE, "Atomic Aggregate"},
|
|
{ BGPTYPE_AGGREGATOR, "Aggregator"},
|
|
{ BGPTYPE_AGGREGATOR4, "Aggregator4"},
|
|
{ BGPTYPE_COMMUNITIES, "Community"},
|
|
{ BGPTYPE_ORIGINATOR_ID, "Originator ID"},
|
|
{ BGPTYPE_CLUSTER_LIST, "Cluster List"},
|
|
{ BGPTYPE_DPA, "DPA"},
|
|
{ BGPTYPE_ADVERTISERS, "Advertisers"},
|
|
{ BGPTYPE_RCID_PATH, "RCID Path / Cluster ID"},
|
|
{ BGPTYPE_MP_REACH_NLRI, "Multi-Protocol Reach NLRI"},
|
|
{ BGPTYPE_MP_UNREACH_NLRI, "Multi-Protocol Unreach NLRI"},
|
|
{ BGPTYPE_EXTD_COMMUNITIES, "Extended Community"},
|
|
{ BGPTYPE_PMSI_TUNNEL, "PMSI Tunnel"},
|
|
{ BGPTYPE_ATTR_SET, "Attribute Set"},
|
|
{ 255, "Reserved for development"},
|
|
{ 0, NULL}
|
|
};
|
|
|
|
#define BGP_AS_SET 1
|
|
#define BGP_AS_SEQUENCE 2
|
|
#define BGP_CONFED_AS_SEQUENCE 3 /* draft-ietf-idr-rfc3065bis-01 */
|
|
#define BGP_CONFED_AS_SET 4 /* draft-ietf-idr-rfc3065bis-01 */
|
|
|
|
#define BGP_AS_SEG_TYPE_MIN BGP_AS_SET
|
|
#define BGP_AS_SEG_TYPE_MAX BGP_CONFED_AS_SET
|
|
|
|
static const struct tok bgp_as_path_segment_open_values[] = {
|
|
{ BGP_AS_SEQUENCE, ""},
|
|
{ BGP_AS_SET, "{ "},
|
|
{ BGP_CONFED_AS_SEQUENCE, "( "},
|
|
{ BGP_CONFED_AS_SET, "({ "},
|
|
{ 0, NULL}
|
|
};
|
|
|
|
static const struct tok bgp_as_path_segment_close_values[] = {
|
|
{ BGP_AS_SEQUENCE, ""},
|
|
{ BGP_AS_SET, "}"},
|
|
{ BGP_CONFED_AS_SEQUENCE, ")"},
|
|
{ BGP_CONFED_AS_SET, "})"},
|
|
{ 0, NULL}
|
|
};
|
|
|
|
#define BGP_OPT_AUTH 1
|
|
#define BGP_OPT_CAP 2
|
|
|
|
|
|
static const struct tok bgp_opt_values[] = {
|
|
{ BGP_OPT_AUTH, "Authentication Information"},
|
|
{ BGP_OPT_CAP, "Capabilities Advertisement"},
|
|
{ 0, NULL}
|
|
};
|
|
|
|
#define BGP_CAPCODE_MP 1
|
|
#define BGP_CAPCODE_RR 2
|
|
#define BGP_CAPCODE_ORF 3 /* XXX */
|
|
#define BGP_CAPCODE_RESTART 64 /* draft-ietf-idr-restart-05 */
|
|
#define BGP_CAPCODE_AS_NEW 65 /* XXX */
|
|
#define BGP_CAPCODE_DYN_CAP 67 /* XXX */
|
|
#define BGP_CAPCODE_RR_CISCO 128
|
|
|
|
static const struct tok bgp_capcode_values[] = {
|
|
{ BGP_CAPCODE_MP, "Multiprotocol Extensions"},
|
|
{ BGP_CAPCODE_RR, "Route Refresh"},
|
|
{ BGP_CAPCODE_ORF, "Cooperative Route Filtering"},
|
|
{ BGP_CAPCODE_RESTART, "Graceful Restart"},
|
|
{ BGP_CAPCODE_AS_NEW, "32-Bit AS Number"},
|
|
{ BGP_CAPCODE_DYN_CAP, "Dynamic Capability"},
|
|
{ BGP_CAPCODE_RR_CISCO, "Route Refresh (Cisco)"},
|
|
{ 0, NULL}
|
|
};
|
|
|
|
#define BGP_NOTIFY_MAJOR_MSG 1
|
|
#define BGP_NOTIFY_MAJOR_OPEN 2
|
|
#define BGP_NOTIFY_MAJOR_UPDATE 3
|
|
#define BGP_NOTIFY_MAJOR_HOLDTIME 4
|
|
#define BGP_NOTIFY_MAJOR_FSM 5
|
|
#define BGP_NOTIFY_MAJOR_CEASE 6
|
|
#define BGP_NOTIFY_MAJOR_CAP 7
|
|
|
|
static const struct tok bgp_notify_major_values[] = {
|
|
{ BGP_NOTIFY_MAJOR_MSG, "Message Header Error"},
|
|
{ BGP_NOTIFY_MAJOR_OPEN, "OPEN Message Error"},
|
|
{ BGP_NOTIFY_MAJOR_UPDATE, "UPDATE Message Error"},
|
|
{ BGP_NOTIFY_MAJOR_HOLDTIME,"Hold Timer Expired"},
|
|
{ BGP_NOTIFY_MAJOR_FSM, "Finite State Machine Error"},
|
|
{ BGP_NOTIFY_MAJOR_CEASE, "Cease"},
|
|
{ BGP_NOTIFY_MAJOR_CAP, "Capability Message Error"},
|
|
{ 0, NULL}
|
|
};
|
|
|
|
/* draft-ietf-idr-cease-subcode-02 */
|
|
#define BGP_NOTIFY_MINOR_CEASE_MAXPRFX 1
|
|
static const struct tok bgp_notify_minor_cease_values[] = {
|
|
{ BGP_NOTIFY_MINOR_CEASE_MAXPRFX, "Maximum Number of Prefixes Reached"},
|
|
{ 2, "Administratively Shutdown"},
|
|
{ 3, "Peer Unconfigured"},
|
|
{ 4, "Administratively Reset"},
|
|
{ 5, "Connection Rejected"},
|
|
{ 6, "Other Configuration Change"},
|
|
{ 7, "Connection Collision Resolution"},
|
|
{ 0, NULL}
|
|
};
|
|
|
|
static const struct tok bgp_notify_minor_msg_values[] = {
|
|
{ 1, "Connection Not Synchronized"},
|
|
{ 2, "Bad Message Length"},
|
|
{ 3, "Bad Message Type"},
|
|
{ 0, NULL}
|
|
};
|
|
|
|
static const struct tok bgp_notify_minor_open_values[] = {
|
|
{ 1, "Unsupported Version Number"},
|
|
{ 2, "Bad Peer AS"},
|
|
{ 3, "Bad BGP Identifier"},
|
|
{ 4, "Unsupported Optional Parameter"},
|
|
{ 5, "Authentication Failure"},
|
|
{ 6, "Unacceptable Hold Time"},
|
|
{ 7, "Capability Message Error"},
|
|
{ 0, NULL}
|
|
};
|
|
|
|
static const struct tok bgp_notify_minor_update_values[] = {
|
|
{ 1, "Malformed Attribute List"},
|
|
{ 2, "Unrecognized Well-known Attribute"},
|
|
{ 3, "Missing Well-known Attribute"},
|
|
{ 4, "Attribute Flags Error"},
|
|
{ 5, "Attribute Length Error"},
|
|
{ 6, "Invalid ORIGIN Attribute"},
|
|
{ 7, "AS Routing Loop"},
|
|
{ 8, "Invalid NEXT_HOP Attribute"},
|
|
{ 9, "Optional Attribute Error"},
|
|
{ 10, "Invalid Network Field"},
|
|
{ 11, "Malformed AS_PATH"},
|
|
{ 0, NULL}
|
|
};
|
|
|
|
static const struct tok bgp_notify_minor_cap_values[] = {
|
|
{ 1, "Invalid Action Value" },
|
|
{ 2, "Invalid Capability Length" },
|
|
{ 3, "Malformed Capability Value" },
|
|
{ 4, "Unsupported Capability Code" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const struct tok bgp_origin_values[] = {
|
|
{ 0, "IGP"},
|
|
{ 1, "EGP"},
|
|
{ 2, "Incomplete"},
|
|
{ 0, NULL}
|
|
};
|
|
|
|
#define BGP_PMSI_TUNNEL_RSVP_P2MP 1
|
|
#define BGP_PMSI_TUNNEL_LDP_P2MP 2
|
|
#define BGP_PMSI_TUNNEL_PIM_SSM 3
|
|
#define BGP_PMSI_TUNNEL_PIM_SM 4
|
|
#define BGP_PMSI_TUNNEL_PIM_BIDIR 5
|
|
#define BGP_PMSI_TUNNEL_INGRESS 6
|
|
#define BGP_PMSI_TUNNEL_LDP_MP2MP 7
|
|
|
|
static const struct tok bgp_pmsi_tunnel_values[] = {
|
|
{ BGP_PMSI_TUNNEL_RSVP_P2MP, "RSVP-TE P2MP LSP"},
|
|
{ BGP_PMSI_TUNNEL_LDP_P2MP, "LDP P2MP LSP"},
|
|
{ BGP_PMSI_TUNNEL_PIM_SSM, "PIM-SSM Tree"},
|
|
{ BGP_PMSI_TUNNEL_PIM_SM, "PIM-SM Tree"},
|
|
{ BGP_PMSI_TUNNEL_PIM_BIDIR, "PIM-Bidir Tree"},
|
|
{ BGP_PMSI_TUNNEL_INGRESS, "Ingress Replication"},
|
|
{ BGP_PMSI_TUNNEL_LDP_MP2MP, "LDP MP2MP LSP"},
|
|
{ 0, NULL}
|
|
};
|
|
|
|
static const struct tok bgp_pmsi_flag_values[] = {
|
|
{ 0x01, "Leaf Information required"},
|
|
{ 0, NULL}
|
|
};
|
|
|
|
|
|
/* Subsequent address family identifier, RFC2283 section 7 */
|
|
#define SAFNUM_RES 0
|
|
#define SAFNUM_UNICAST 1
|
|
#define SAFNUM_MULTICAST 2
|
|
#define SAFNUM_UNIMULTICAST 3
|
|
/* labeled BGP RFC3107 */
|
|
#define SAFNUM_LABUNICAST 4
|
|
/* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */
|
|
#define SAFNUM_MULTICAST_VPN 5
|
|
#define SAFNUM_TUNNEL 64 /* XXX */
|
|
#define SAFNUM_VPLS 65 /* XXX */
|
|
/* draft-nalawade-idr-mdt-safi-03 */
|
|
#define SAFNUM_MDT 66
|
|
/* Section 4.3.4 of draft-rosen-rfc2547bis-03.txt */
|
|
#define SAFNUM_VPNUNICAST 128
|
|
#define SAFNUM_VPNMULTICAST 129
|
|
#define SAFNUM_VPNUNIMULTICAST 130
|
|
/* draft-marques-ppvpn-rt-constrain-01.txt */
|
|
#define SAFNUM_RT_ROUTING_INFO 132
|
|
|
|
#define BGP_VPN_RD_LEN 8
|
|
|
|
static const struct tok bgp_safi_values[] = {
|
|
{ SAFNUM_RES, "Reserved"},
|
|
{ SAFNUM_UNICAST, "Unicast"},
|
|
{ SAFNUM_MULTICAST, "Multicast"},
|
|
{ SAFNUM_UNIMULTICAST, "Unicast+Multicast"},
|
|
{ SAFNUM_LABUNICAST, "labeled Unicast"},
|
|
{ SAFNUM_TUNNEL, "Tunnel"},
|
|
{ SAFNUM_VPLS, "VPLS"},
|
|
{ SAFNUM_MDT, "MDT"},
|
|
{ SAFNUM_VPNUNICAST, "labeled VPN Unicast"},
|
|
{ SAFNUM_VPNMULTICAST, "labeled VPN Multicast"},
|
|
{ SAFNUM_VPNUNIMULTICAST, "labeled VPN Unicast+Multicast"},
|
|
{ SAFNUM_RT_ROUTING_INFO, "Route Target Routing Information"},
|
|
{ SAFNUM_MULTICAST_VPN, "Multicast VPN"},
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/* well-known community */
|
|
#define BGP_COMMUNITY_NO_EXPORT 0xffffff01
|
|
#define BGP_COMMUNITY_NO_ADVERT 0xffffff02
|
|
#define BGP_COMMUNITY_NO_EXPORT_SUBCONFED 0xffffff03
|
|
|
|
/* Extended community type - draft-ietf-idr-bgp-ext-communities-05 */
|
|
#define BGP_EXT_COM_RT_0 0x0002 /* Route Target,Format AS(2bytes):AN(4bytes) */
|
|
#define BGP_EXT_COM_RT_1 0x0102 /* Route Target,Format IP address:AN(2bytes) */
|
|
#define BGP_EXT_COM_RT_2 0x0202 /* Route Target,Format AN(4bytes):local(2bytes) */
|
|
#define BGP_EXT_COM_RO_0 0x0003 /* Route Origin,Format AS(2bytes):AN(4bytes) */
|
|
#define BGP_EXT_COM_RO_1 0x0103 /* Route Origin,Format IP address:AN(2bytes) */
|
|
#define BGP_EXT_COM_RO_2 0x0203 /* Route Origin,Format AN(4bytes):local(2bytes) */
|
|
#define BGP_EXT_COM_LINKBAND 0x4004 /* Link Bandwidth,Format AS(2B):Bandwidth(4B) */
|
|
/* rfc2547 bgp-mpls-vpns */
|
|
#define BGP_EXT_COM_VPN_ORIGIN 0x0005 /* OSPF Domain ID / VPN of Origin - draft-rosen-vpns-ospf-bgp-mpls */
|
|
#define BGP_EXT_COM_VPN_ORIGIN2 0x0105 /* duplicate - keep for backwards compatability */
|
|
#define BGP_EXT_COM_VPN_ORIGIN3 0x0205 /* duplicate - keep for backwards compatability */
|
|
#define BGP_EXT_COM_VPN_ORIGIN4 0x8005 /* duplicate - keep for backwards compatability */
|
|
|
|
#define BGP_EXT_COM_OSPF_RTYPE 0x0306 /* OSPF Route Type,Format Area(4B):RouteType(1B):Options(1B) */
|
|
#define BGP_EXT_COM_OSPF_RTYPE2 0x8000 /* duplicate - keep for backwards compatability */
|
|
|
|
#define BGP_EXT_COM_OSPF_RID 0x0107 /* OSPF Router ID,Format RouterID(4B):Unused(2B) */
|
|
#define BGP_EXT_COM_OSPF_RID2 0x8001 /* duplicate - keep for backwards compatability */
|
|
|
|
#define BGP_EXT_COM_L2INFO 0x800a /* draft-kompella-ppvpn-l2vpn */
|
|
|
|
#define BGP_EXT_COM_SOURCE_AS 0x0009 /* RFC-ietf-l3vpn-2547bis-mcast-bgp-08.txt */
|
|
#define BGP_EXT_COM_VRF_RT_IMP 0x010b /* RFC-ietf-l3vpn-2547bis-mcast-bgp-08.txt */
|
|
#define BGP_EXT_COM_L2VPN_RT_0 0x000a /* L2VPN Identifier,Format AS(2bytes):AN(4bytes) */
|
|
#define BGP_EXT_COM_L2VPN_RT_1 0xF10a /* L2VPN Identifier,Format IP address:AN(2bytes) */
|
|
|
|
|
|
/* http://www.cisco.com/en/US/tech/tk436/tk428/technologies_tech_note09186a00801eb09a.shtml */
|
|
#define BGP_EXT_COM_EIGRP_GEN 0x8800
|
|
#define BGP_EXT_COM_EIGRP_METRIC_AS_DELAY 0x8801
|
|
#define BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW 0x8802
|
|
#define BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU 0x8803
|
|
#define BGP_EXT_COM_EIGRP_EXT_REMAS_REMID 0x8804
|
|
#define BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC 0x8805
|
|
|
|
static const struct tok bgp_extd_comm_flag_values[] = {
|
|
{ 0x8000, "vendor-specific"},
|
|
{ 0x4000, "non-transitive"},
|
|
{ 0, NULL},
|
|
};
|
|
|
|
static const struct tok bgp_extd_comm_subtype_values[] = {
|
|
{ BGP_EXT_COM_RT_0, "target"},
|
|
{ BGP_EXT_COM_RT_1, "target"},
|
|
{ BGP_EXT_COM_RT_2, "target"},
|
|
{ BGP_EXT_COM_RO_0, "origin"},
|
|
{ BGP_EXT_COM_RO_1, "origin"},
|
|
{ BGP_EXT_COM_RO_2, "origin"},
|
|
{ BGP_EXT_COM_LINKBAND, "link-BW"},
|
|
{ BGP_EXT_COM_VPN_ORIGIN, "ospf-domain"},
|
|
{ BGP_EXT_COM_VPN_ORIGIN2, "ospf-domain"},
|
|
{ BGP_EXT_COM_VPN_ORIGIN3, "ospf-domain"},
|
|
{ BGP_EXT_COM_VPN_ORIGIN4, "ospf-domain"},
|
|
{ BGP_EXT_COM_OSPF_RTYPE, "ospf-route-type"},
|
|
{ BGP_EXT_COM_OSPF_RTYPE2, "ospf-route-type"},
|
|
{ BGP_EXT_COM_OSPF_RID, "ospf-router-id"},
|
|
{ BGP_EXT_COM_OSPF_RID2, "ospf-router-id"},
|
|
{ BGP_EXT_COM_L2INFO, "layer2-info"},
|
|
{ BGP_EXT_COM_EIGRP_GEN , "eigrp-general-route (flag, tag)" },
|
|
{ BGP_EXT_COM_EIGRP_METRIC_AS_DELAY , "eigrp-route-metric (AS, delay)" },
|
|
{ BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW , "eigrp-route-metric (reliability, nexthop, bandwidth)" },
|
|
{ BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU , "eigrp-route-metric (load, MTU)" },
|
|
{ BGP_EXT_COM_EIGRP_EXT_REMAS_REMID , "eigrp-external-route (remote-AS, remote-ID)" },
|
|
{ BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC , "eigrp-external-route (remote-proto, remote-metric)" },
|
|
{ BGP_EXT_COM_SOURCE_AS, "source-AS" },
|
|
{ BGP_EXT_COM_VRF_RT_IMP, "vrf-route-import"},
|
|
{ BGP_EXT_COM_L2VPN_RT_0, "l2vpn-id"},
|
|
{ BGP_EXT_COM_L2VPN_RT_1, "l2vpn-id"},
|
|
{ 0, NULL},
|
|
};
|
|
|
|
/* OSPF codes for BGP_EXT_COM_OSPF_RTYPE draft-rosen-vpns-ospf-bgp-mpls */
|
|
#define BGP_OSPF_RTYPE_RTR 1 /* OSPF Router LSA */
|
|
#define BGP_OSPF_RTYPE_NET 2 /* OSPF Network LSA */
|
|
#define BGP_OSPF_RTYPE_SUM 3 /* OSPF Summary LSA */
|
|
#define BGP_OSPF_RTYPE_EXT 5 /* OSPF External LSA, note that ASBR doesn't apply to MPLS-VPN */
|
|
#define BGP_OSPF_RTYPE_NSSA 7 /* OSPF NSSA External*/
|
|
#define BGP_OSPF_RTYPE_SHAM 129 /* OSPF-MPLS-VPN Sham link */
|
|
#define BGP_OSPF_RTYPE_METRIC_TYPE 0x1 /* LSB of RTYPE Options Field */
|
|
|
|
static const struct tok bgp_extd_comm_ospf_rtype_values[] = {
|
|
{ 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 },
|
|
};
|
|
|
|
#define TOKBUFSIZE 128
|
|
static char astostr[20];
|
|
|
|
/*
|
|
* as_printf
|
|
*
|
|
* Convert an AS number into a string and return string pointer.
|
|
*
|
|
* Depending on bflag is set or not, AS number is converted into ASDOT notation
|
|
* or plain number notation.
|
|
*
|
|
*/
|
|
static char *
|
|
as_printf(netdissect_options *ndo,
|
|
char *str, int size, u_int asnum)
|
|
{
|
|
if (!ndo->ndo_bflag || asnum <= 0xFFFF) {
|
|
snprintf(str, size, "%u", asnum);
|
|
} else {
|
|
snprintf(str, size, "%u.%u", asnum >> 16, asnum & 0xFFFF);
|
|
}
|
|
return str;
|
|
}
|
|
|
|
#define ITEMCHECK(minlen) if (itemlen < minlen) goto badtlv;
|
|
|
|
int
|
|
decode_prefix4(netdissect_options *ndo,
|
|
const u_char *pptr, u_int itemlen, char *buf, u_int buflen)
|
|
{
|
|
struct in_addr addr;
|
|
u_int plen, plenbytes;
|
|
|
|
ND_TCHECK(pptr[0]);
|
|
ITEMCHECK(1);
|
|
plen = pptr[0];
|
|
if (32 < plen)
|
|
return -1;
|
|
itemlen -= 1;
|
|
|
|
memset(&addr, 0, sizeof(addr));
|
|
plenbytes = (plen + 7) / 8;
|
|
ND_TCHECK2(pptr[1], plenbytes);
|
|
ITEMCHECK(plenbytes);
|
|
memcpy(&addr, &pptr[1], plenbytes);
|
|
if (plen % 8) {
|
|
((u_char *)&addr)[plenbytes - 1] &=
|
|
((0xff00 >> (plen % 8)) & 0xff);
|
|
}
|
|
snprintf(buf, buflen, "%s/%d", getname(ndo, (u_char *)&addr), plen);
|
|
return 1 + plenbytes;
|
|
|
|
trunc:
|
|
return -2;
|
|
|
|
badtlv:
|
|
return -3;
|
|
}
|
|
|
|
static int
|
|
decode_labeled_prefix4(netdissect_options *ndo,
|
|
const u_char *pptr, u_int itemlen, char *buf, u_int buflen)
|
|
{
|
|
struct in_addr addr;
|
|
u_int plen, plenbytes;
|
|
|
|
/* prefix length and label = 4 bytes */
|
|
ND_TCHECK2(pptr[0], 4);
|
|
ITEMCHECK(4);
|
|
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
|
|
*/
|
|
|
|
if (24 > plen)
|
|
return -1;
|
|
|
|
plen-=24; /* adjust prefixlen - labellength */
|
|
|
|
if (32 < plen)
|
|
return -1;
|
|
itemlen -= 4;
|
|
|
|
memset(&addr, 0, sizeof(addr));
|
|
plenbytes = (plen + 7) / 8;
|
|
ND_TCHECK2(pptr[4], plenbytes);
|
|
ITEMCHECK(plenbytes);
|
|
memcpy(&addr, &pptr[4], plenbytes);
|
|
if (plen % 8) {
|
|
((u_char *)&addr)[plenbytes - 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(ndo, (u_char *)&addr),
|
|
plen,
|
|
EXTRACT_24BITS(pptr+1)>>4,
|
|
((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
|
|
|
|
return 4 + plenbytes;
|
|
|
|
trunc:
|
|
return -2;
|
|
|
|
badtlv:
|
|
return -3;
|
|
}
|
|
|
|
/*
|
|
* bgp_vpn_ip_print
|
|
*
|
|
* print an ipv4 or ipv6 address into a buffer dependend on address length.
|
|
*/
|
|
static char *
|
|
bgp_vpn_ip_print(netdissect_options *ndo,
|
|
const u_char *pptr, u_int addr_length) {
|
|
|
|
/* worst case string is s fully formatted v6 address */
|
|
static char addr[sizeof("1234:5678:89ab:cdef:1234:5678:89ab:cdef")];
|
|
char *pos = addr;
|
|
|
|
switch(addr_length) {
|
|
case (sizeof(struct in_addr) << 3): /* 32 */
|
|
ND_TCHECK2(pptr[0], sizeof(struct in_addr));
|
|
snprintf(pos, sizeof(addr), "%s", ipaddr_string(ndo, pptr));
|
|
break;
|
|
#ifdef INET6
|
|
case (sizeof(struct in6_addr) << 3): /* 128 */
|
|
ND_TCHECK2(pptr[0], sizeof(struct in6_addr));
|
|
snprintf(pos, sizeof(addr), "%s", ip6addr_string(ndo, pptr));
|
|
break;
|
|
#endif
|
|
default:
|
|
snprintf(pos, sizeof(addr), "bogus address length %u", addr_length);
|
|
break;
|
|
}
|
|
pos += strlen(pos);
|
|
|
|
trunc:
|
|
*(pos) = '\0';
|
|
return (addr);
|
|
}
|
|
|
|
/*
|
|
* bgp_vpn_sg_print
|
|
*
|
|
* print an multicast s,g entry into a buffer.
|
|
* the s,g entry is encoded like this.
|
|
*
|
|
* +-----------------------------------+
|
|
* | Multicast Source Length (1 octet) |
|
|
* +-----------------------------------+
|
|
* | Multicast Source (Variable) |
|
|
* +-----------------------------------+
|
|
* | Multicast Group Length (1 octet) |
|
|
* +-----------------------------------+
|
|
* | Multicast Group (Variable) |
|
|
* +-----------------------------------+
|
|
*
|
|
* return the number of bytes read from the wire.
|
|
*/
|
|
static int
|
|
bgp_vpn_sg_print(netdissect_options *ndo,
|
|
const u_char *pptr, char *buf, u_int buflen) {
|
|
|
|
uint8_t addr_length;
|
|
u_int total_length, offset;
|
|
|
|
total_length = 0;
|
|
|
|
/* Source address length, encoded in bits */
|
|
ND_TCHECK2(pptr[0], 1);
|
|
addr_length = *pptr++;
|
|
|
|
/* Source address */
|
|
ND_TCHECK2(pptr[0], (addr_length >> 3));
|
|
total_length += (addr_length >> 3) + 1;
|
|
offset = strlen(buf);
|
|
if (addr_length) {
|
|
snprintf(buf + offset, buflen - offset, ", Source %s",
|
|
bgp_vpn_ip_print(ndo, pptr, addr_length));
|
|
pptr += (addr_length >> 3);
|
|
}
|
|
|
|
/* Group address length, encoded in bits */
|
|
ND_TCHECK2(pptr[0], 1);
|
|
addr_length = *pptr++;
|
|
|
|
/* Group address */
|
|
ND_TCHECK2(pptr[0], (addr_length >> 3));
|
|
total_length += (addr_length >> 3) + 1;
|
|
offset = strlen(buf);
|
|
if (addr_length) {
|
|
snprintf(buf + offset, buflen - offset, ", Group %s",
|
|
bgp_vpn_ip_print(ndo, pptr, addr_length));
|
|
pptr += (addr_length >> 3);
|
|
}
|
|
|
|
trunc:
|
|
return (total_length);
|
|
}
|
|
|
|
|
|
/* RDs and RTs share the same semantics
|
|
* we use bgp_vpn_rd_print for
|
|
* printing route targets inside a NLRI */
|
|
char *
|
|
bgp_vpn_rd_print(netdissect_options *ndo,
|
|
const u_char *pptr) {
|
|
|
|
/* allocate space for the largest possible string */
|
|
static char rd[sizeof("xxxxxxxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")];
|
|
char *pos = rd;
|
|
|
|
/* ok lets load the RD format */
|
|
switch (EXTRACT_16BITS(pptr)) {
|
|
|
|
/* 2-byte-AS:number fmt*/
|
|
case 0:
|
|
snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u (= %u.%u.%u.%u)",
|
|
EXTRACT_16BITS(pptr+2),
|
|
EXTRACT_32BITS(pptr+4),
|
|
*(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), "%s:%u (%u.%u.%u.%u:%u)",
|
|
as_printf(ndo, astostr, sizeof(astostr), EXTRACT_32BITS(pptr+2)),
|
|
EXTRACT_16BITS(pptr+6), *(pptr+2), *(pptr+3), *(pptr+4),
|
|
*(pptr+5), 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(netdissect_options *ndo,
|
|
const u_char *pptr, char *buf, u_int buflen)
|
|
{
|
|
uint8_t route_target[8];
|
|
u_int plen;
|
|
|
|
ND_TCHECK(pptr[0]);
|
|
plen = pptr[0]; /* get prefix length */
|
|
|
|
if (0 == plen)
|
|
return 1; /* default route target */
|
|
|
|
if (32 > plen)
|
|
return -1;
|
|
|
|
plen-=32; /* adjust prefix length */
|
|
|
|
if (64 < plen)
|
|
return -1;
|
|
|
|
memset(&route_target, 0, sizeof(route_target));
|
|
ND_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: %s, route target %s",
|
|
as_printf(ndo, astostr, sizeof(astostr), EXTRACT_32BITS(pptr+1)),
|
|
bgp_vpn_rd_print(ndo, (u_char *)&route_target));
|
|
|
|
return 5 + (plen + 7) / 8;
|
|
|
|
trunc:
|
|
return -2;
|
|
}
|
|
|
|
static int
|
|
decode_labeled_vpn_prefix4(netdissect_options *ndo,
|
|
const u_char *pptr, char *buf, u_int buflen)
|
|
{
|
|
struct in_addr addr;
|
|
u_int plen;
|
|
|
|
ND_TCHECK(pptr[0]);
|
|
plen = pptr[0]; /* get prefix length */
|
|
|
|
if ((24+64) > plen)
|
|
return -1;
|
|
|
|
plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
|
|
|
|
if (32 < plen)
|
|
return -1;
|
|
|
|
memset(&addr, 0, sizeof(addr));
|
|
ND_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(ndo, pptr+4),
|
|
getname(ndo, (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;
|
|
}
|
|
|
|
/*
|
|
* +-------------------------------+
|
|
* | |
|
|
* | RD:IPv4-address (12 octets) |
|
|
* | |
|
|
* +-------------------------------+
|
|
* | MDT Group-address (4 octets) |
|
|
* +-------------------------------+
|
|
*/
|
|
|
|
#define MDT_VPN_NLRI_LEN 16
|
|
|
|
static int
|
|
decode_mdt_vpn_nlri(netdissect_options *ndo,
|
|
const u_char *pptr, char *buf, u_int buflen)
|
|
{
|
|
|
|
const u_char *rd;
|
|
const u_char *vpn_ip;
|
|
|
|
ND_TCHECK(pptr[0]);
|
|
|
|
/* if the NLRI is not predefined length, quit.*/
|
|
if (*pptr != MDT_VPN_NLRI_LEN * 8)
|
|
return -1;
|
|
pptr++;
|
|
|
|
/* RD */
|
|
ND_TCHECK2(pptr[0], 8);
|
|
rd = pptr;
|
|
pptr+=8;
|
|
|
|
/* IPv4 address */
|
|
ND_TCHECK2(pptr[0], sizeof(struct in_addr));
|
|
vpn_ip = pptr;
|
|
pptr+=sizeof(struct in_addr);
|
|
|
|
/* MDT Group Address */
|
|
ND_TCHECK2(pptr[0], sizeof(struct in_addr));
|
|
|
|
snprintf(buf, buflen, "RD: %s, VPN IP Address: %s, MC Group Address: %s",
|
|
bgp_vpn_rd_print(ndo, rd), ipaddr_string(ndo, vpn_ip), ipaddr_string(ndo, pptr));
|
|
|
|
return MDT_VPN_NLRI_LEN + 1;
|
|
|
|
trunc:
|
|
|
|
return -2;
|
|
}
|
|
|
|
#define BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI 1
|
|
#define BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI 2
|
|
#define BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI 3
|
|
#define BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF 4
|
|
#define BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE 5
|
|
#define BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN 6
|
|
#define BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN 7
|
|
|
|
static const struct tok bgp_multicast_vpn_route_type_values[] = {
|
|
{ BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI, "Intra-AS I-PMSI"},
|
|
{ BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI, "Inter-AS I-PMSI"},
|
|
{ BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI, "S-PMSI"},
|
|
{ BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF, "Intra-AS Segment-Leaf"},
|
|
{ BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE, "Source-Active"},
|
|
{ BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN, "Shared Tree Join"},
|
|
{ BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN, "Source Tree Join"},
|
|
};
|
|
|
|
static int
|
|
decode_multicast_vpn(netdissect_options *ndo,
|
|
const u_char *pptr, char *buf, u_int buflen)
|
|
{
|
|
uint8_t route_type, route_length, addr_length, sg_length;
|
|
u_int offset;
|
|
|
|
ND_TCHECK2(pptr[0], 2);
|
|
route_type = *pptr++;
|
|
route_length = *pptr++;
|
|
|
|
snprintf(buf, buflen, "Route-Type: %s (%u), length: %u",
|
|
tok2str(bgp_multicast_vpn_route_type_values,
|
|
"Unknown", route_type),
|
|
route_type, route_length);
|
|
|
|
switch(route_type) {
|
|
case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI:
|
|
ND_TCHECK2(pptr[0], BGP_VPN_RD_LEN);
|
|
offset = strlen(buf);
|
|
snprintf(buf + offset, buflen - offset, ", RD: %s, Originator %s",
|
|
bgp_vpn_rd_print(ndo, pptr),
|
|
bgp_vpn_ip_print(ndo, pptr + BGP_VPN_RD_LEN,
|
|
(route_length - BGP_VPN_RD_LEN) << 3));
|
|
break;
|
|
case BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI:
|
|
ND_TCHECK2(pptr[0], BGP_VPN_RD_LEN + 4);
|
|
offset = strlen(buf);
|
|
snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %s",
|
|
bgp_vpn_rd_print(ndo, pptr),
|
|
as_printf(ndo, astostr, sizeof(astostr),
|
|
EXTRACT_32BITS(pptr + BGP_VPN_RD_LEN)));
|
|
break;
|
|
|
|
case BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI:
|
|
ND_TCHECK2(pptr[0], BGP_VPN_RD_LEN);
|
|
offset = strlen(buf);
|
|
snprintf(buf + offset, buflen - offset, ", RD: %s",
|
|
bgp_vpn_rd_print(ndo, pptr));
|
|
pptr += BGP_VPN_RD_LEN;
|
|
|
|
sg_length = bgp_vpn_sg_print(ndo, pptr, buf, buflen);
|
|
addr_length = route_length - sg_length;
|
|
|
|
ND_TCHECK2(pptr[0], addr_length);
|
|
offset = strlen(buf);
|
|
snprintf(buf + offset, buflen - offset, ", Originator %s",
|
|
bgp_vpn_ip_print(ndo, pptr, addr_length << 3));
|
|
break;
|
|
|
|
case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE:
|
|
ND_TCHECK2(pptr[0], BGP_VPN_RD_LEN);
|
|
offset = strlen(buf);
|
|
snprintf(buf + offset, buflen - offset, ", RD: %s",
|
|
bgp_vpn_rd_print(ndo, pptr));
|
|
pptr += BGP_VPN_RD_LEN;
|
|
|
|
bgp_vpn_sg_print(ndo, pptr, buf, buflen);
|
|
break;
|
|
|
|
case BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN: /* fall through */
|
|
case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN:
|
|
ND_TCHECK2(pptr[0], BGP_VPN_RD_LEN);
|
|
offset = strlen(buf);
|
|
snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %s",
|
|
bgp_vpn_rd_print(ndo, pptr),
|
|
as_printf(ndo, astostr, sizeof(astostr),
|
|
EXTRACT_32BITS(pptr + BGP_VPN_RD_LEN)));
|
|
pptr += BGP_VPN_RD_LEN;
|
|
|
|
bgp_vpn_sg_print(ndo, pptr, buf, buflen);
|
|
break;
|
|
|
|
/*
|
|
* no per route-type printing yet.
|
|
*/
|
|
case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return route_length + 2;
|
|
|
|
trunc:
|
|
return -2;
|
|
}
|
|
|
|
/*
|
|
* As I remember, some versions of systems have an snprintf() that
|
|
* returns -1 if the buffer would have overflowed. If the return
|
|
* value is negative, set buflen to 0, to indicate that we've filled
|
|
* the buffer up.
|
|
*
|
|
* If the return value is greater than buflen, that means that
|
|
* the buffer would have overflowed; again, set buflen to 0 in
|
|
* that case.
|
|
*/
|
|
#define UPDATE_BUF_BUFLEN(buf, buflen, strlen) \
|
|
if (strlen<0) \
|
|
buflen=0; \
|
|
else if ((u_int)strlen>buflen) \
|
|
buflen=0; \
|
|
else { \
|
|
buflen-=strlen; \
|
|
buf+=strlen; \
|
|
}
|
|
|
|
static int
|
|
decode_labeled_vpn_l2(netdissect_options *ndo,
|
|
const u_char *pptr, char *buf, u_int buflen)
|
|
{
|
|
int plen,tlen,strlen,tlv_type,tlv_len,ttlv_len;
|
|
|
|
ND_TCHECK2(pptr[0], 2);
|
|
plen=EXTRACT_16BITS(pptr);
|
|
tlen=plen;
|
|
pptr+=2;
|
|
/* Old and new L2VPN NLRI share AFI/SAFI
|
|
* -> Assume a 12 Byte-length NLRI is auto-discovery-only
|
|
* and > 17 as old format. Complain for the middle case
|
|
*/
|
|
if (plen==12) {
|
|
/* assume AD-only with RD, BGPNH */
|
|
ND_TCHECK2(pptr[0],12);
|
|
buf[0]='\0';
|
|
strlen=snprintf(buf, buflen, "RD: %s, BGPNH: %s",
|
|
bgp_vpn_rd_print(ndo, pptr),
|
|
/* need something like getname(ndo, ) here */
|
|
getname(ndo, pptr+8)
|
|
);
|
|
UPDATE_BUF_BUFLEN(buf, buflen, strlen);
|
|
pptr+=12;
|
|
tlen-=12;
|
|
return plen;
|
|
} else if (plen>17) {
|
|
/* assume old format */
|
|
/* RD, ID, LBLKOFF, LBLBASE */
|
|
|
|
ND_TCHECK2(pptr[0],15);
|
|
buf[0]='\0';
|
|
strlen=snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u",
|
|
bgp_vpn_rd_print(ndo, 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 */
|
|
UPDATE_BUF_BUFLEN(buf, buflen, strlen);
|
|
pptr+=15;
|
|
tlen-=15;
|
|
|
|
/* ok now the variable part - lets read out TLVs*/
|
|
while (tlen>0) {
|
|
if (tlen < 3)
|
|
return -1;
|
|
ND_TCHECK2(pptr[0], 3);
|
|
tlv_type=*pptr++;
|
|
tlv_len=EXTRACT_16BITS(pptr);
|
|
ttlv_len=tlv_len;
|
|
pptr+=2;
|
|
|
|
switch(tlv_type) {
|
|
case 1:
|
|
if (buflen!=0) {
|
|
strlen=snprintf(buf,buflen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
|
|
tlv_type,
|
|
tlv_len);
|
|
UPDATE_BUF_BUFLEN(buf, buflen, strlen);
|
|
}
|
|
ttlv_len=ttlv_len/8+1; /* how many bytes do we need to read ? */
|
|
while (ttlv_len>0) {
|
|
ND_TCHECK(pptr[0]);
|
|
if (buflen!=0) {
|
|
strlen=snprintf(buf,buflen, "%02x",*pptr++);
|
|
UPDATE_BUF_BUFLEN(buf, buflen, strlen);
|
|
}
|
|
ttlv_len--;
|
|
}
|
|
break;
|
|
default:
|
|
if (buflen!=0) {
|
|
strlen=snprintf(buf,buflen, "\n\t\tunknown TLV #%u, length: %u",
|
|
tlv_type,
|
|
tlv_len);
|
|
UPDATE_BUF_BUFLEN(buf, buflen, strlen);
|
|
}
|
|
break;
|
|
}
|
|
tlen-=(tlv_len<<3); /* the tlv-length is expressed in bits so lets shift it right */
|
|
}
|
|
return plen+2;
|
|
|
|
} else {
|
|
/* complain bitterly ? */
|
|
/* fall through */
|
|
goto trunc;
|
|
}
|
|
|
|
trunc:
|
|
return -2;
|
|
}
|
|
|
|
#ifdef INET6
|
|
int
|
|
decode_prefix6(netdissect_options *ndo,
|
|
const u_char *pd, u_int itemlen, char *buf, u_int buflen)
|
|
{
|
|
struct in6_addr addr;
|
|
u_int plen, plenbytes;
|
|
|
|
ND_TCHECK(pd[0]);
|
|
ITEMCHECK(1);
|
|
plen = pd[0];
|
|
if (128 < plen)
|
|
return -1;
|
|
itemlen -= 1;
|
|
|
|
memset(&addr, 0, sizeof(addr));
|
|
plenbytes = (plen + 7) / 8;
|
|
ND_TCHECK2(pd[1], plenbytes);
|
|
ITEMCHECK(plenbytes);
|
|
memcpy(&addr, &pd[1], plenbytes);
|
|
if (plen % 8) {
|
|
addr.s6_addr[plenbytes - 1] &=
|
|
((0xff00 >> (plen % 8)) & 0xff);
|
|
}
|
|
snprintf(buf, buflen, "%s/%d", getname6(ndo, (u_char *)&addr), plen);
|
|
return 1 + plenbytes;
|
|
|
|
trunc:
|
|
return -2;
|
|
|
|
badtlv:
|
|
return -3;
|
|
}
|
|
|
|
static int
|
|
decode_labeled_prefix6(netdissect_options *ndo,
|
|
const u_char *pptr, u_int itemlen, char *buf, u_int buflen)
|
|
{
|
|
struct in6_addr addr;
|
|
u_int plen, plenbytes;
|
|
|
|
/* prefix length and label = 4 bytes */
|
|
ND_TCHECK2(pptr[0], 4);
|
|
ITEMCHECK(4);
|
|
plen = pptr[0]; /* get prefix length */
|
|
|
|
if (24 > plen)
|
|
return -1;
|
|
|
|
plen-=24; /* adjust prefixlen - labellength */
|
|
|
|
if (128 < plen)
|
|
return -1;
|
|
itemlen -= 4;
|
|
|
|
memset(&addr, 0, sizeof(addr));
|
|
plenbytes = (plen + 7) / 8;
|
|
ND_TCHECK2(pptr[4], plenbytes);
|
|
memcpy(&addr, &pptr[4], plenbytes);
|
|
if (plen % 8) {
|
|
addr.s6_addr[plenbytes - 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(ndo, (u_char *)&addr),
|
|
plen,
|
|
EXTRACT_24BITS(pptr+1)>>4,
|
|
((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
|
|
|
|
return 4 + plenbytes;
|
|
|
|
trunc:
|
|
return -2;
|
|
|
|
badtlv:
|
|
return -3;
|
|
}
|
|
|
|
static int
|
|
decode_labeled_vpn_prefix6(netdissect_options *ndo,
|
|
const u_char *pptr, char *buf, u_int buflen)
|
|
{
|
|
struct in6_addr addr;
|
|
u_int plen;
|
|
|
|
ND_TCHECK(pptr[0]);
|
|
plen = pptr[0]; /* get prefix length */
|
|
|
|
if ((24+64) > plen)
|
|
return -1;
|
|
|
|
plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
|
|
|
|
if (128 < plen)
|
|
return -1;
|
|
|
|
memset(&addr, 0, sizeof(addr));
|
|
ND_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(ndo, pptr+4),
|
|
getname6(ndo, (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
|
|
decode_clnp_prefix(netdissect_options *ndo,
|
|
const u_char *pptr, char *buf, u_int buflen)
|
|
{
|
|
uint8_t addr[19];
|
|
u_int plen;
|
|
|
|
ND_TCHECK(pptr[0]);
|
|
plen = pptr[0]; /* get prefix length */
|
|
|
|
if (152 < plen)
|
|
return -1;
|
|
|
|
memset(&addr, 0, sizeof(addr));
|
|
ND_TCHECK2(pptr[4], (plen + 7) / 8);
|
|
memcpy(&addr, &pptr[4], (plen + 7) / 8);
|
|
if (plen % 8) {
|
|
addr[(plen + 7) / 8 - 1] &=
|
|
((0xff00 >> (plen % 8)) & 0xff);
|
|
}
|
|
snprintf(buf, buflen, "%s/%d",
|
|
isonsap_string(addr,(plen + 7) / 8),
|
|
plen);
|
|
|
|
return 1 + (plen + 7) / 8;
|
|
|
|
trunc:
|
|
return -2;
|
|
}
|
|
|
|
static int
|
|
decode_labeled_vpn_clnp_prefix(netdissect_options *ndo,
|
|
const u_char *pptr, char *buf, u_int buflen)
|
|
{
|
|
uint8_t addr[19];
|
|
u_int plen;
|
|
|
|
ND_TCHECK(pptr[0]);
|
|
plen = pptr[0]; /* get prefix length */
|
|
|
|
if ((24+64) > plen)
|
|
return -1;
|
|
|
|
plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
|
|
|
|
if (152 < plen)
|
|
return -1;
|
|
|
|
memset(&addr, 0, sizeof(addr));
|
|
ND_TCHECK2(pptr[12], (plen + 7) / 8);
|
|
memcpy(&addr, &pptr[12], (plen + 7) / 8);
|
|
if (plen % 8) {
|
|
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(ndo, pptr+4),
|
|
isonsap_string(addr,(plen + 7) / 8),
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* bgp_attr_get_as_size
|
|
*
|
|
* Try to find the size of the ASs encoded in an as-path. It is not obvious, as
|
|
* both Old speakers that do not support 4 byte AS, and the new speakers that do
|
|
* support, exchange AS-Path with the same path-attribute type value 0x02.
|
|
*/
|
|
static int
|
|
bgp_attr_get_as_size(netdissect_options *ndo,
|
|
uint8_t bgpa_type, const u_char *pptr, int len)
|
|
{
|
|
const u_char *tptr = pptr;
|
|
|
|
/*
|
|
* If the path attribute is the optional AS4 path type, then we already
|
|
* know, that ASs must be encoded in 4 byte format.
|
|
*/
|
|
if (bgpa_type == BGPTYPE_AS4_PATH) {
|
|
return 4;
|
|
}
|
|
|
|
/*
|
|
* Let us assume that ASs are of 2 bytes in size, and check if the AS-Path
|
|
* TLV is good. If not, ask the caller to try with AS encoded as 4 bytes
|
|
* each.
|
|
*/
|
|
while (tptr < pptr + len) {
|
|
ND_TCHECK(tptr[0]);
|
|
|
|
/*
|
|
* If we do not find a valid segment type, our guess might be wrong.
|
|
*/
|
|
if (tptr[0] < BGP_AS_SEG_TYPE_MIN || tptr[0] > BGP_AS_SEG_TYPE_MAX) {
|
|
goto trunc;
|
|
}
|
|
ND_TCHECK(tptr[1]);
|
|
tptr += 2 + tptr[1] * 2;
|
|
}
|
|
|
|
/*
|
|
* If we correctly reached end of the AS path attribute data content,
|
|
* then most likely ASs were indeed encoded as 2 bytes.
|
|
*/
|
|
if (tptr == pptr + len) {
|
|
return 2;
|
|
}
|
|
|
|
trunc:
|
|
|
|
/*
|
|
* We can come here, either we did not have enough data, or if we
|
|
* try to decode 4 byte ASs in 2 byte format. Either way, return 4,
|
|
* so that calller can try to decode each AS as of 4 bytes. If indeed
|
|
* there was not enough data, it will crib and end the parse anyways.
|
|
*/
|
|
return 4;
|
|
}
|
|
|
|
static int
|
|
bgp_attr_print(netdissect_options *ndo,
|
|
u_int atype, const u_char *pptr, u_int len)
|
|
{
|
|
int i;
|
|
uint16_t af;
|
|
uint8_t safi, snpa, nhlen;
|
|
union { /* copy buffer for bandwidth values */
|
|
float f;
|
|
uint32_t i;
|
|
} bw;
|
|
int advance;
|
|
u_int tlen;
|
|
const u_char *tptr;
|
|
char buf[MAXHOSTNAMELEN + 100];
|
|
char tokbuf[TOKBUFSIZE];
|
|
int as_size;
|
|
|
|
tptr = pptr;
|
|
tlen=len;
|
|
|
|
switch (atype) {
|
|
case BGPTYPE_ORIGIN:
|
|
if (len != 1)
|
|
ND_PRINT((ndo, "invalid len"));
|
|
else {
|
|
ND_TCHECK(*tptr);
|
|
ND_PRINT((ndo, "%s", tok2strbuf(bgp_origin_values,
|
|
"Unknown Origin Typecode",
|
|
tptr[0],
|
|
tokbuf, sizeof(tokbuf))));
|
|
}
|
|
break;
|
|
|
|
|
|
/*
|
|
* Process AS4 byte path and AS2 byte path attributes here.
|
|
*/
|
|
case BGPTYPE_AS4_PATH:
|
|
case BGPTYPE_AS_PATH:
|
|
if (len % 2) {
|
|
ND_PRINT((ndo, "invalid len"));
|
|
break;
|
|
}
|
|
if (!len) {
|
|
ND_PRINT((ndo, "empty"));
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* BGP updates exchanged between New speakers that support 4
|
|
* byte AS, ASs are always encoded in 4 bytes. There is no
|
|
* definitive way to find this, just by the packet's
|
|
* contents. So, check for packet's TLV's sanity assuming
|
|
* 2 bytes first, and it does not pass, assume that ASs are
|
|
* encoded in 4 bytes format and move on.
|
|
*/
|
|
as_size = bgp_attr_get_as_size(ndo, atype, pptr, len);
|
|
|
|
while (tptr < pptr + len) {
|
|
ND_TCHECK(tptr[0]);
|
|
ND_PRINT((ndo, "%s", tok2strbuf(bgp_as_path_segment_open_values,
|
|
"?", tptr[0],
|
|
tokbuf, sizeof(tokbuf))));
|
|
for (i = 0; i < tptr[1] * as_size; i += as_size) {
|
|
ND_TCHECK2(tptr[2 + i], as_size);
|
|
ND_PRINT((ndo, "%s ",
|
|
as_printf(ndo, astostr, sizeof(astostr),
|
|
as_size == 2 ?
|
|
EXTRACT_16BITS(&tptr[2 + i]) :
|
|
EXTRACT_32BITS(&tptr[2 + i]))));
|
|
}
|
|
ND_TCHECK(tptr[0]);
|
|
ND_PRINT((ndo, "%s", tok2strbuf(bgp_as_path_segment_close_values,
|
|
"?", tptr[0],
|
|
tokbuf, sizeof(tokbuf))));
|
|
ND_TCHECK(tptr[1]);
|
|
tptr += 2 + tptr[1] * as_size;
|
|
}
|
|
break;
|
|
case BGPTYPE_NEXT_HOP:
|
|
if (len != 4)
|
|
ND_PRINT((ndo, "invalid len"));
|
|
else {
|
|
ND_TCHECK2(tptr[0], 4);
|
|
ND_PRINT((ndo, "%s", getname(ndo, tptr)));
|
|
}
|
|
break;
|
|
case BGPTYPE_MULTI_EXIT_DISC:
|
|
case BGPTYPE_LOCAL_PREF:
|
|
if (len != 4)
|
|
ND_PRINT((ndo, "invalid len"));
|
|
else {
|
|
ND_TCHECK2(tptr[0], 4);
|
|
ND_PRINT((ndo, "%u", EXTRACT_32BITS(tptr)));
|
|
}
|
|
break;
|
|
case BGPTYPE_ATOMIC_AGGREGATE:
|
|
if (len != 0)
|
|
ND_PRINT((ndo, "invalid len"));
|
|
break;
|
|
case BGPTYPE_AGGREGATOR:
|
|
|
|
/*
|
|
* Depending on the AS encoded is of 2 bytes or of 4 bytes,
|
|
* the length of this PA can be either 6 bytes or 8 bytes.
|
|
*/
|
|
if (len != 6 && len != 8) {
|
|
ND_PRINT((ndo, "invalid len"));
|
|
break;
|
|
}
|
|
ND_TCHECK2(tptr[0], len);
|
|
if (len == 6) {
|
|
ND_PRINT((ndo, " AS #%s, origin %s",
|
|
as_printf(ndo, astostr, sizeof(astostr), EXTRACT_16BITS(tptr)),
|
|
getname(ndo, tptr + 2)));
|
|
} else {
|
|
ND_PRINT((ndo, " AS #%s, origin %s",
|
|
as_printf(ndo, astostr, sizeof(astostr),
|
|
EXTRACT_32BITS(tptr)), getname(ndo, tptr + 4)));
|
|
}
|
|
break;
|
|
case BGPTYPE_AGGREGATOR4:
|
|
if (len != 8) {
|
|
ND_PRINT((ndo, "invalid len"));
|
|
break;
|
|
}
|
|
ND_TCHECK2(tptr[0], 8);
|
|
ND_PRINT((ndo, " AS #%s, origin %s",
|
|
as_printf(ndo, astostr, sizeof(astostr), EXTRACT_32BITS(tptr)),
|
|
getname(ndo, tptr + 4)));
|
|
break;
|
|
case BGPTYPE_COMMUNITIES:
|
|
if (len % 4) {
|
|
ND_PRINT((ndo, "invalid len"));
|
|
break;
|
|
}
|
|
while (tlen>0) {
|
|
uint32_t comm;
|
|
ND_TCHECK2(tptr[0], 4);
|
|
comm = EXTRACT_32BITS(tptr);
|
|
switch (comm) {
|
|
case BGP_COMMUNITY_NO_EXPORT:
|
|
ND_PRINT((ndo, " NO_EXPORT"));
|
|
break;
|
|
case BGP_COMMUNITY_NO_ADVERT:
|
|
ND_PRINT((ndo, " NO_ADVERTISE"));
|
|
break;
|
|
case BGP_COMMUNITY_NO_EXPORT_SUBCONFED:
|
|
ND_PRINT((ndo, " NO_EXPORT_SUBCONFED"));
|
|
break;
|
|
default:
|
|
ND_PRINT((ndo, "%u:%u%s",
|
|
(comm >> 16) & 0xffff,
|
|
comm & 0xffff,
|
|
(tlen>4) ? ", " : ""));
|
|
break;
|
|
}
|
|
tlen -=4;
|
|
tptr +=4;
|
|
}
|
|
break;
|
|
case BGPTYPE_ORIGINATOR_ID:
|
|
if (len != 4) {
|
|
ND_PRINT((ndo, "invalid len"));
|
|
break;
|
|
}
|
|
ND_TCHECK2(tptr[0], 4);
|
|
ND_PRINT((ndo, "%s",getname(ndo, tptr)));
|
|
break;
|
|
case BGPTYPE_CLUSTER_LIST:
|
|
if (len % 4) {
|
|
ND_PRINT((ndo, "invalid len"));
|
|
break;
|
|
}
|
|
while (tlen>0) {
|
|
ND_TCHECK2(tptr[0], 4);
|
|
ND_PRINT((ndo, "%s%s",
|
|
getname(ndo, tptr),
|
|
(tlen>4) ? ", " : ""));
|
|
tlen -=4;
|
|
tptr +=4;
|
|
}
|
|
break;
|
|
case BGPTYPE_MP_REACH_NLRI:
|
|
ND_TCHECK2(tptr[0], 3);
|
|
af = EXTRACT_16BITS(tptr);
|
|
safi = tptr[2];
|
|
|
|
ND_PRINT((ndo, "\n\t AFI: %s (%u), %sSAFI: %s (%u)",
|
|
tok2strbuf(af_values, "Unknown AFI", af,
|
|
tokbuf, sizeof(tokbuf)),
|
|
af,
|
|
(safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
|
|
tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
|
|
tokbuf, sizeof(tokbuf)),
|
|
safi));
|
|
|
|
switch(af<<8 | safi) {
|
|
case (AFNUM_INET<<8 | SAFNUM_UNICAST):
|
|
case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
|
|
case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
|
|
case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
|
|
case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
|
|
case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
|
|
case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
|
|
case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
|
|
case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN):
|
|
case (AFNUM_INET<<8 | SAFNUM_MDT):
|
|
#ifdef INET6
|
|
case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
|
|
case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
|
|
case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
|
|
case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
|
|
case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
|
|
case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
|
|
case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
|
|
#endif
|
|
case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
|
|
case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
|
|
case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
|
|
case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
|
|
case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
|
|
case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
|
|
case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
|
|
case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
|
|
case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
|
|
case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
|
|
break;
|
|
default:
|
|
ND_TCHECK2(tptr[0], tlen);
|
|
ND_PRINT((ndo, "\n\t no AFI %u / SAFI %u decoder", af, safi));
|
|
if (ndo->ndo_vflag <= 1)
|
|
print_unknown_data(ndo, tptr, "\n\t ", tlen);
|
|
goto done;
|
|
break;
|
|
}
|
|
|
|
tptr +=3;
|
|
|
|
ND_TCHECK(tptr[0]);
|
|
nhlen = tptr[0];
|
|
tlen = nhlen;
|
|
tptr++;
|
|
|
|
if (tlen) {
|
|
int nnh = 0;
|
|
ND_PRINT((ndo, "\n\t nexthop: "));
|
|
while (tlen > 0) {
|
|
if ( nnh++ > 0 ) {
|
|
ND_PRINT((ndo, ", " ));
|
|
}
|
|
switch(af<<8 | safi) {
|
|
case (AFNUM_INET<<8 | SAFNUM_UNICAST):
|
|
case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
|
|
case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
|
|
case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
|
|
case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
|
|
case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN):
|
|
case (AFNUM_INET<<8 | SAFNUM_MDT):
|
|
if (tlen < (int)sizeof(struct in_addr)) {
|
|
ND_PRINT((ndo, "invalid len"));
|
|
tlen = 0;
|
|
} else {
|
|
ND_TCHECK2(tptr[0], sizeof(struct in_addr));
|
|
ND_PRINT((ndo, "%s",getname(ndo, tptr)));
|
|
tlen -= sizeof(struct in_addr);
|
|
tptr += sizeof(struct in_addr);
|
|
}
|
|
break;
|
|
case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
|
|
case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
|
|
case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
|
|
if (tlen < (int)(sizeof(struct in_addr)+BGP_VPN_RD_LEN)) {
|
|
ND_PRINT((ndo, "invalid len"));
|
|
tlen = 0;
|
|
} else {
|
|
ND_TCHECK2(tptr[0], sizeof(struct in_addr)+BGP_VPN_RD_LEN);
|
|
ND_PRINT((ndo, "RD: %s, %s",
|
|
bgp_vpn_rd_print(ndo, tptr),
|
|
getname(ndo, tptr+BGP_VPN_RD_LEN)));
|
|
tlen -= (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
|
|
tptr += (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
|
|
}
|
|
break;
|
|
#ifdef INET6
|
|
case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
|
|
case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
|
|
case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
|
|
case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
|
|
if (tlen < (int)sizeof(struct in6_addr)) {
|
|
ND_PRINT((ndo, "invalid len"));
|
|
tlen = 0;
|
|
} else {
|
|
ND_TCHECK2(tptr[0], sizeof(struct in6_addr));
|
|
ND_PRINT((ndo, "%s", getname6(ndo, tptr)));
|
|
tlen -= sizeof(struct in6_addr);
|
|
tptr += sizeof(struct in6_addr);
|
|
}
|
|
break;
|
|
case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
|
|
case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
|
|
case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
|
|
if (tlen < (int)(sizeof(struct in6_addr)+BGP_VPN_RD_LEN)) {
|
|
ND_PRINT((ndo, "invalid len"));
|
|
tlen = 0;
|
|
} else {
|
|
ND_TCHECK2(tptr[0], sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
|
|
ND_PRINT((ndo, "RD: %s, %s",
|
|
bgp_vpn_rd_print(ndo, tptr),
|
|
getname6(ndo, tptr+BGP_VPN_RD_LEN)));
|
|
tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
|
|
tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
|
|
}
|
|
break;
|
|
#endif
|
|
case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
|
|
case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
|
|
case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
|
|
case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
|
|
if (tlen < (int)sizeof(struct in_addr)) {
|
|
ND_PRINT((ndo, "invalid len"));
|
|
tlen = 0;
|
|
} else {
|
|
ND_TCHECK2(tptr[0], sizeof(struct in_addr));
|
|
ND_PRINT((ndo, "%s", getname(ndo, tptr)));
|
|
tlen -= (sizeof(struct in_addr));
|
|
tptr += (sizeof(struct in_addr));
|
|
}
|
|
break;
|
|
case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
|
|
case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
|
|
case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
|
|
ND_TCHECK2(tptr[0], tlen);
|
|
ND_PRINT((ndo, "%s", isonsap_string(tptr, tlen)));
|
|
tptr += tlen;
|
|
tlen = 0;
|
|
break;
|
|
|
|
case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
|
|
case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
|
|
case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
|
|
if (tlen < BGP_VPN_RD_LEN+1) {
|
|
ND_PRINT((ndo, "invalid len"));
|
|
tlen = 0;
|
|
} else {
|
|
ND_TCHECK2(tptr[0], tlen);
|
|
ND_PRINT((ndo, "RD: %s, %s",
|
|
bgp_vpn_rd_print(ndo, tptr),
|
|
isonsap_string(tptr+BGP_VPN_RD_LEN,tlen-BGP_VPN_RD_LEN)));
|
|
/* rfc986 mapped IPv4 address ? */
|
|
if (EXTRACT_32BITS(tptr+BGP_VPN_RD_LEN) == 0x47000601)
|
|
ND_PRINT((ndo, " = %s", getname(ndo, tptr+BGP_VPN_RD_LEN+4)));
|
|
#ifdef INET6
|
|
/* rfc1888 mapped IPv6 address ? */
|
|
else if (EXTRACT_24BITS(tptr+BGP_VPN_RD_LEN) == 0x350000)
|
|
ND_PRINT((ndo, " = %s", getname6(ndo, tptr+BGP_VPN_RD_LEN+3)));
|
|
#endif
|
|
tptr += tlen;
|
|
tlen = 0;
|
|
}
|
|
break;
|
|
default:
|
|
ND_TCHECK2(tptr[0], tlen);
|
|
ND_PRINT((ndo, "no AFI %u/SAFI %u decoder", af, safi));
|
|
if (ndo->ndo_vflag <= 1)
|
|
print_unknown_data(ndo, tptr, "\n\t ", tlen);
|
|
tptr += tlen;
|
|
tlen = 0;
|
|
goto done;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
ND_PRINT((ndo, ", nh-length: %u", nhlen));
|
|
tptr += tlen;
|
|
|
|
ND_TCHECK(tptr[0]);
|
|
snpa = tptr[0];
|
|
tptr++;
|
|
|
|
if (snpa) {
|
|
ND_PRINT((ndo, "\n\t %u SNPA", snpa));
|
|
for (/*nothing*/; snpa > 0; snpa--) {
|
|
ND_TCHECK(tptr[0]);
|
|
ND_PRINT((ndo, "\n\t %d bytes", tptr[0]));
|
|
tptr += tptr[0] + 1;
|
|
}
|
|
} else {
|
|
ND_PRINT((ndo, ", no SNPA"));
|
|
}
|
|
|
|
while (len - (tptr - pptr) > 0) {
|
|
switch (af<<8 | safi) {
|
|
case (AFNUM_INET<<8 | SAFNUM_UNICAST):
|
|
case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
|
|
case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
|
|
advance = decode_prefix4(ndo, tptr, len, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
ND_PRINT((ndo, "\n\t (illegal prefix length)"));
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else if (advance == -3)
|
|
break; /* bytes left, but not enough */
|
|
else
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
break;
|
|
case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
|
|
advance = decode_labeled_prefix4(ndo, tptr, len, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
ND_PRINT((ndo, "\n\t (illegal prefix length)"));
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else if (advance == -3)
|
|
break; /* bytes left, but not enough */
|
|
else
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
break;
|
|
case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
|
|
case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
|
|
case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
|
|
advance = decode_labeled_vpn_prefix4(ndo, tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
ND_PRINT((ndo, "\n\t (illegal prefix length)"));
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
break;
|
|
case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
|
|
advance = decode_rt_routing_info(ndo, tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
ND_PRINT((ndo, "\n\t (illegal prefix length)"));
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
break;
|
|
case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */
|
|
case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN):
|
|
advance = decode_multicast_vpn(ndo, tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
ND_PRINT((ndo, "\n\t (illegal prefix length)"));
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
break;
|
|
|
|
case (AFNUM_INET<<8 | SAFNUM_MDT):
|
|
advance = decode_mdt_vpn_nlri(ndo, tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
ND_PRINT((ndo, "\n\t (illegal prefix length)"));
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
break;
|
|
#ifdef INET6
|
|
case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
|
|
case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
|
|
case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
|
|
advance = decode_prefix6(ndo, tptr, len, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
ND_PRINT((ndo, "\n\t (illegal prefix length)"));
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else if (advance == -3)
|
|
break; /* bytes left, but not enough */
|
|
else
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
break;
|
|
case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
|
|
advance = decode_labeled_prefix6(ndo, tptr, len, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
ND_PRINT((ndo, "\n\t (illegal prefix length)"));
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else if (advance == -3)
|
|
break; /* bytes left, but not enough */
|
|
else
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
break;
|
|
case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
|
|
case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
|
|
case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
|
|
advance = decode_labeled_vpn_prefix6(ndo, tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
ND_PRINT((ndo, "\n\t (illegal prefix length)"));
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
break;
|
|
#endif
|
|
case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
|
|
case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
|
|
case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
|
|
case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
|
|
advance = decode_labeled_vpn_l2(ndo, tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
ND_PRINT((ndo, "\n\t (illegal length)"));
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
break;
|
|
case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
|
|
case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
|
|
case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
|
|
advance = decode_clnp_prefix(ndo, tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
ND_PRINT((ndo, "\n\t (illegal prefix length)"));
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
break;
|
|
case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
|
|
case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
|
|
case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
|
|
advance = decode_labeled_vpn_clnp_prefix(ndo, tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
ND_PRINT((ndo, "\n\t (illegal prefix length)"));
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
break;
|
|
default:
|
|
ND_TCHECK2(*tptr,tlen);
|
|
ND_PRINT((ndo, "\n\t no AFI %u / SAFI %u decoder", af, safi));
|
|
if (ndo->ndo_vflag <= 1)
|
|
print_unknown_data(ndo, tptr, "\n\t ", tlen);
|
|
advance = 0;
|
|
tptr = pptr + len;
|
|
break;
|
|
}
|
|
if (advance < 0)
|
|
break;
|
|
tptr += advance;
|
|
}
|
|
done:
|
|
break;
|
|
|
|
case BGPTYPE_MP_UNREACH_NLRI:
|
|
ND_TCHECK2(tptr[0], BGP_MP_NLRI_MINSIZE);
|
|
af = EXTRACT_16BITS(tptr);
|
|
safi = tptr[2];
|
|
|
|
ND_PRINT((ndo, "\n\t AFI: %s (%u), %sSAFI: %s (%u)",
|
|
tok2strbuf(af_values, "Unknown AFI", af,
|
|
tokbuf, sizeof(tokbuf)),
|
|
af,
|
|
(safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
|
|
tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
|
|
tokbuf, sizeof(tokbuf)),
|
|
safi));
|
|
|
|
if (len == BGP_MP_NLRI_MINSIZE)
|
|
ND_PRINT((ndo, "\n\t End-of-Rib Marker (empty NLRI)"));
|
|
|
|
tptr += 3;
|
|
|
|
while (len - (tptr - pptr) > 0) {
|
|
switch (af<<8 | safi) {
|
|
case (AFNUM_INET<<8 | SAFNUM_UNICAST):
|
|
case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
|
|
case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
|
|
advance = decode_prefix4(ndo, tptr, len, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
ND_PRINT((ndo, "\n\t (illegal prefix length)"));
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else if (advance == -3)
|
|
break; /* bytes left, but not enough */
|
|
else
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
break;
|
|
case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
|
|
advance = decode_labeled_prefix4(ndo, tptr, len, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
ND_PRINT((ndo, "\n\t (illegal prefix length)"));
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else if (advance == -3)
|
|
break; /* bytes left, but not enough */
|
|
else
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
break;
|
|
case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
|
|
case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
|
|
case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
|
|
advance = decode_labeled_vpn_prefix4(ndo, tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
ND_PRINT((ndo, "\n\t (illegal prefix length)"));
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
break;
|
|
#ifdef INET6
|
|
case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
|
|
case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
|
|
case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
|
|
advance = decode_prefix6(ndo, tptr, len, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
ND_PRINT((ndo, "\n\t (illegal prefix length)"));
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else if (advance == -3)
|
|
break; /* bytes left, but not enough */
|
|
else
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
break;
|
|
case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
|
|
advance = decode_labeled_prefix6(ndo, tptr, len, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
ND_PRINT((ndo, "\n\t (illegal prefix length)"));
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else if (advance == -3)
|
|
break; /* bytes left, but not enough */
|
|
else
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
break;
|
|
case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
|
|
case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
|
|
case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
|
|
advance = decode_labeled_vpn_prefix6(ndo, tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
ND_PRINT((ndo, "\n\t (illegal prefix length)"));
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
break;
|
|
#endif
|
|
case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
|
|
case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
|
|
case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
|
|
case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
|
|
advance = decode_labeled_vpn_l2(ndo, tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
ND_PRINT((ndo, "\n\t (illegal length)"));
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
break;
|
|
case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
|
|
case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
|
|
case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
|
|
advance = decode_clnp_prefix(ndo, tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
ND_PRINT((ndo, "\n\t (illegal prefix length)"));
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
break;
|
|
case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
|
|
case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
|
|
case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
|
|
advance = decode_labeled_vpn_clnp_prefix(ndo, tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
ND_PRINT((ndo, "\n\t (illegal prefix length)"));
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
break;
|
|
case (AFNUM_INET<<8 | SAFNUM_MDT):
|
|
advance = decode_mdt_vpn_nlri(ndo, tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
ND_PRINT((ndo, "\n\t (illegal prefix length)"));
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
break;
|
|
case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */
|
|
case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN):
|
|
advance = decode_multicast_vpn(ndo, tptr, buf, sizeof(buf));
|
|
if (advance == -1)
|
|
ND_PRINT((ndo, "\n\t (illegal prefix length)"));
|
|
else if (advance == -2)
|
|
goto trunc;
|
|
else
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
break;
|
|
default:
|
|
ND_TCHECK2(*(tptr-3),tlen);
|
|
ND_PRINT((ndo, "no AFI %u / SAFI %u decoder", af, safi));
|
|
if (ndo->ndo_vflag <= 1)
|
|
print_unknown_data(ndo, tptr-3, "\n\t ", tlen);
|
|
advance = 0;
|
|
tptr = pptr + len;
|
|
break;
|
|
}
|
|
if (advance < 0)
|
|
break;
|
|
tptr += advance;
|
|
}
|
|
break;
|
|
case BGPTYPE_EXTD_COMMUNITIES:
|
|
if (len % 8) {
|
|
ND_PRINT((ndo, "invalid len"));
|
|
break;
|
|
}
|
|
while (tlen>0) {
|
|
uint16_t extd_comm;
|
|
|
|
ND_TCHECK2(tptr[0], 2);
|
|
extd_comm=EXTRACT_16BITS(tptr);
|
|
|
|
ND_PRINT((ndo, "\n\t %s (0x%04x), Flags [%s]",
|
|
tok2strbuf(bgp_extd_comm_subtype_values,
|
|
"unknown extd community typecode",
|
|
extd_comm, tokbuf, sizeof(tokbuf)),
|
|
extd_comm,
|
|
bittok2str(bgp_extd_comm_flag_values, "none", extd_comm)));
|
|
|
|
ND_TCHECK2(*(tptr+2), 6);
|
|
switch(extd_comm) {
|
|
case BGP_EXT_COM_RT_0:
|
|
case BGP_EXT_COM_RO_0:
|
|
case BGP_EXT_COM_L2VPN_RT_0:
|
|
ND_PRINT((ndo, ": %u:%u (= %s)",
|
|
EXTRACT_16BITS(tptr+2),
|
|
EXTRACT_32BITS(tptr+4),
|
|
getname(ndo, tptr+4)));
|
|
break;
|
|
case BGP_EXT_COM_RT_1:
|
|
case BGP_EXT_COM_RO_1:
|
|
case BGP_EXT_COM_L2VPN_RT_1:
|
|
case BGP_EXT_COM_VRF_RT_IMP:
|
|
ND_PRINT((ndo, ": %s:%u",
|
|
getname(ndo, tptr+2),
|
|
EXTRACT_16BITS(tptr+6)));
|
|
break;
|
|
case BGP_EXT_COM_RT_2:
|
|
case BGP_EXT_COM_RO_2:
|
|
ND_PRINT((ndo, ": %s:%u",
|
|
as_printf(ndo, astostr, sizeof(astostr),
|
|
EXTRACT_32BITS(tptr+2)), EXTRACT_16BITS(tptr+6)));
|
|
break;
|
|
case BGP_EXT_COM_LINKBAND:
|
|
bw.i = EXTRACT_32BITS(tptr+2);
|
|
ND_PRINT((ndo, ": 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:
|
|
ND_PRINT((ndo, "%s", getname(ndo, tptr+2)));
|
|
break;
|
|
case BGP_EXT_COM_OSPF_RTYPE:
|
|
case BGP_EXT_COM_OSPF_RTYPE2:
|
|
ND_PRINT((ndo, ": area:%s, router-type:%s, metric-type:%s%s",
|
|
getname(ndo, tptr+2),
|
|
tok2strbuf(bgp_extd_comm_ospf_rtype_values,
|
|
"unknown (0x%02x)",
|
|
*(tptr+6),
|
|
tokbuf, sizeof(tokbuf)),
|
|
(*(tptr+7) & BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "",
|
|
((*(tptr+6) == BGP_OSPF_RTYPE_EXT) || (*(tptr+6) == BGP_OSPF_RTYPE_NSSA)) ? "E1" : ""));
|
|
break;
|
|
case BGP_EXT_COM_L2INFO:
|
|
ND_PRINT((ndo, ": %s Control Flags [0x%02x]:MTU %u",
|
|
tok2strbuf(l2vpn_encaps_values,
|
|
"unknown encaps",
|
|
*(tptr+2),
|
|
tokbuf, sizeof(tokbuf)),
|
|
*(tptr+3),
|
|
EXTRACT_16BITS(tptr+4)));
|
|
break;
|
|
case BGP_EXT_COM_SOURCE_AS:
|
|
ND_PRINT((ndo, ": AS %u", EXTRACT_16BITS(tptr+2)));
|
|
break;
|
|
default:
|
|
ND_TCHECK2(*tptr,8);
|
|
print_unknown_data(ndo, tptr, "\n\t ", 8);
|
|
break;
|
|
}
|
|
tlen -=8;
|
|
tptr +=8;
|
|
}
|
|
break;
|
|
|
|
case BGPTYPE_PMSI_TUNNEL:
|
|
{
|
|
uint8_t tunnel_type, flags;
|
|
|
|
tunnel_type = *(tptr+1);
|
|
flags = *tptr;
|
|
tlen = len;
|
|
|
|
ND_TCHECK2(tptr[0], 5);
|
|
ND_PRINT((ndo, "\n\t Tunnel-type %s (%u), Flags [%s], MPLS Label %u",
|
|
tok2str(bgp_pmsi_tunnel_values, "Unknown", tunnel_type),
|
|
tunnel_type,
|
|
bittok2str(bgp_pmsi_flag_values, "none", flags),
|
|
EXTRACT_24BITS(tptr+2)>>4));
|
|
|
|
tptr +=5;
|
|
tlen -= 5;
|
|
|
|
switch (tunnel_type) {
|
|
case BGP_PMSI_TUNNEL_PIM_SM: /* fall through */
|
|
case BGP_PMSI_TUNNEL_PIM_BIDIR:
|
|
ND_TCHECK2(tptr[0], 8);
|
|
ND_PRINT((ndo, "\n\t Sender %s, P-Group %s",
|
|
ipaddr_string(ndo, tptr),
|
|
ipaddr_string(ndo, tptr+4)));
|
|
break;
|
|
|
|
case BGP_PMSI_TUNNEL_PIM_SSM:
|
|
ND_TCHECK2(tptr[0], 8);
|
|
ND_PRINT((ndo, "\n\t Root-Node %s, P-Group %s",
|
|
ipaddr_string(ndo, tptr),
|
|
ipaddr_string(ndo, tptr+4)));
|
|
break;
|
|
case BGP_PMSI_TUNNEL_INGRESS:
|
|
ND_TCHECK2(tptr[0], 4);
|
|
ND_PRINT((ndo, "\n\t Tunnel-Endpoint %s",
|
|
ipaddr_string(ndo, tptr)));
|
|
break;
|
|
case BGP_PMSI_TUNNEL_LDP_P2MP: /* fall through */
|
|
case BGP_PMSI_TUNNEL_LDP_MP2MP:
|
|
ND_TCHECK2(tptr[0], 8);
|
|
ND_PRINT((ndo, "\n\t Root-Node %s, LSP-ID 0x%08x",
|
|
ipaddr_string(ndo, tptr),
|
|
EXTRACT_32BITS(tptr+4)));
|
|
break;
|
|
case BGP_PMSI_TUNNEL_RSVP_P2MP:
|
|
ND_TCHECK2(tptr[0], 8);
|
|
ND_PRINT((ndo, "\n\t Extended-Tunnel-ID %s, P2MP-ID 0x%08x",
|
|
ipaddr_string(ndo, tptr),
|
|
EXTRACT_32BITS(tptr+4)));
|
|
break;
|
|
default:
|
|
if (ndo->ndo_vflag <= 1) {
|
|
print_unknown_data(ndo, tptr, "\n\t ", tlen);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case BGPTYPE_ATTR_SET:
|
|
ND_TCHECK2(tptr[0], 4);
|
|
if (len < 4)
|
|
goto trunc;
|
|
ND_PRINT((ndo, "\n\t Origin AS: %s",
|
|
as_printf(ndo, astostr, sizeof(astostr), EXTRACT_32BITS(tptr))));
|
|
tptr+=4;
|
|
len -=4;
|
|
|
|
while (len) {
|
|
u_int aflags, atype, alenlen, alen;
|
|
|
|
ND_TCHECK2(tptr[0], 2);
|
|
if (len < 2)
|
|
goto trunc;
|
|
aflags = *tptr;
|
|
atype = *(tptr + 1);
|
|
tptr += 2;
|
|
len -= 2;
|
|
alenlen = bgp_attr_lenlen(aflags, tptr);
|
|
ND_TCHECK2(tptr[0], alenlen);
|
|
if (len < alenlen)
|
|
goto trunc;
|
|
alen = bgp_attr_len(aflags, tptr);
|
|
tptr += alenlen;
|
|
len -= alenlen;
|
|
|
|
ND_PRINT((ndo, "\n\t %s (%u), length: %u",
|
|
tok2strbuf(bgp_attr_values,
|
|
"Unknown Attribute", atype,
|
|
tokbuf, sizeof(tokbuf)),
|
|
atype,
|
|
alen));
|
|
|
|
if (aflags) {
|
|
ND_PRINT((ndo, ", Flags [%s%s%s%s",
|
|
aflags & 0x80 ? "O" : "",
|
|
aflags & 0x40 ? "T" : "",
|
|
aflags & 0x20 ? "P" : "",
|
|
aflags & 0x10 ? "E" : ""));
|
|
if (aflags & 0xf)
|
|
ND_PRINT((ndo, "+%x", aflags & 0xf));
|
|
ND_PRINT((ndo, "]: "));
|
|
}
|
|
/* FIXME check for recursion */
|
|
if (!bgp_attr_print(ndo, atype, tptr, alen))
|
|
return 0;
|
|
tptr += alen;
|
|
len -= alen;
|
|
}
|
|
break;
|
|
|
|
|
|
default:
|
|
ND_TCHECK2(*pptr,len);
|
|
ND_PRINT((ndo, "\n\t no Attribute %u decoder", atype)); /* we have no decoder for the attribute */
|
|
if (ndo->ndo_vflag <= 1)
|
|
print_unknown_data(ndo, pptr, "\n\t ", len);
|
|
break;
|
|
}
|
|
if (ndo->ndo_vflag > 1 && len) { /* omit zero length attributes*/
|
|
ND_TCHECK2(*pptr,len);
|
|
print_unknown_data(ndo, pptr, "\n\t ", len);
|
|
}
|
|
return 1;
|
|
|
|
trunc:
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
bgp_capabilities_print(netdissect_options *ndo,
|
|
const u_char *opt, int caps_len)
|
|
{
|
|
char tokbuf[TOKBUFSIZE];
|
|
char tokbuf2[TOKBUFSIZE];
|
|
int cap_type, cap_len, tcap_len, cap_offset;
|
|
int i = 0;
|
|
|
|
while (i < caps_len) {
|
|
ND_TCHECK2(opt[i], BGP_CAP_HEADER_SIZE);
|
|
cap_type=opt[i];
|
|
cap_len=opt[i+1];
|
|
tcap_len=cap_len;
|
|
ND_PRINT((ndo, "\n\t %s (%u), length: %u",
|
|
tok2strbuf(bgp_capcode_values, "Unknown",
|
|
cap_type, tokbuf, sizeof(tokbuf)),
|
|
cap_type,
|
|
cap_len));
|
|
ND_TCHECK2(opt[i+2], cap_len);
|
|
switch (cap_type) {
|
|
case BGP_CAPCODE_MP:
|
|
ND_PRINT((ndo, "\n\t\tAFI %s (%u), SAFI %s (%u)",
|
|
tok2strbuf(af_values, "Unknown",
|
|
EXTRACT_16BITS(opt+i+2),
|
|
tokbuf, sizeof(tokbuf)),
|
|
EXTRACT_16BITS(opt+i+2),
|
|
tok2strbuf(bgp_safi_values, "Unknown",
|
|
opt[i+5],
|
|
tokbuf, sizeof(tokbuf)),
|
|
opt[i+5]));
|
|
break;
|
|
case BGP_CAPCODE_RESTART:
|
|
ND_PRINT((ndo, "\n\t\tRestart Flags: [%s], Restart Time %us",
|
|
((opt[i+2])&0x80) ? "R" : "none",
|
|
EXTRACT_16BITS(opt+i+2)&0xfff));
|
|
tcap_len-=2;
|
|
cap_offset=4;
|
|
while(tcap_len>=4) {
|
|
ND_PRINT((ndo, "\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s",
|
|
tok2strbuf(af_values,"Unknown",
|
|
EXTRACT_16BITS(opt+i+cap_offset),
|
|
tokbuf, sizeof(tokbuf)),
|
|
EXTRACT_16BITS(opt+i+cap_offset),
|
|
tok2strbuf(bgp_safi_values,"Unknown",
|
|
opt[i+cap_offset+2],
|
|
tokbuf2, sizeof(tokbuf2)),
|
|
opt[i+cap_offset+2],
|
|
((opt[i+cap_offset+3])&0x80) ? "yes" : "no" ));
|
|
tcap_len-=4;
|
|
cap_offset+=4;
|
|
}
|
|
break;
|
|
case BGP_CAPCODE_RR:
|
|
case BGP_CAPCODE_RR_CISCO:
|
|
break;
|
|
case BGP_CAPCODE_AS_NEW:
|
|
|
|
/*
|
|
* Extract the 4 byte AS number encoded.
|
|
*/
|
|
if (cap_len == 4) {
|
|
ND_PRINT((ndo, "\n\t\t 4 Byte AS %s",
|
|
as_printf(ndo, astostr, sizeof(astostr),
|
|
EXTRACT_32BITS(opt + i + 2))));
|
|
}
|
|
break;
|
|
default:
|
|
ND_PRINT((ndo, "\n\t\tno decoder for Capability %u",
|
|
cap_type));
|
|
if (ndo->ndo_vflag <= 1)
|
|
print_unknown_data(ndo, &opt[i+2], "\n\t\t", cap_len);
|
|
break;
|
|
}
|
|
if (ndo->ndo_vflag > 1 && cap_len > 0) {
|
|
print_unknown_data(ndo, &opt[i+2], "\n\t\t", cap_len);
|
|
}
|
|
i += BGP_CAP_HEADER_SIZE + cap_len;
|
|
}
|
|
return;
|
|
|
|
trunc:
|
|
ND_PRINT((ndo, "[|BGP]"));
|
|
}
|
|
|
|
static void
|
|
bgp_open_print(netdissect_options *ndo,
|
|
const u_char *dat, int length)
|
|
{
|
|
struct bgp_open bgpo;
|
|
struct bgp_opt bgpopt;
|
|
const u_char *opt;
|
|
int i;
|
|
char tokbuf[TOKBUFSIZE];
|
|
|
|
ND_TCHECK2(dat[0], BGP_OPEN_SIZE);
|
|
memcpy(&bgpo, dat, BGP_OPEN_SIZE);
|
|
|
|
ND_PRINT((ndo, "\n\t Version %d, ", bgpo.bgpo_version));
|
|
ND_PRINT((ndo, "my AS %s, ",
|
|
as_printf(ndo, astostr, sizeof(astostr), ntohs(bgpo.bgpo_myas))));
|
|
ND_PRINT((ndo, "Holdtime %us, ", ntohs(bgpo.bgpo_holdtime)));
|
|
ND_PRINT((ndo, "ID %s", getname(ndo, (u_char *)&bgpo.bgpo_id)));
|
|
ND_PRINT((ndo, "\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) {
|
|
ND_TCHECK2(opt[i], BGP_OPT_SIZE);
|
|
memcpy(&bgpopt, &opt[i], BGP_OPT_SIZE);
|
|
if (i + 2 + bgpopt.bgpopt_len > bgpo.bgpo_optlen) {
|
|
ND_PRINT((ndo, "\n\t Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len));
|
|
break;
|
|
}
|
|
|
|
ND_PRINT((ndo, "\n\t Option %s (%u), length: %u",
|
|
tok2strbuf(bgp_opt_values,"Unknown",
|
|
bgpopt.bgpopt_type,
|
|
tokbuf, sizeof(tokbuf)),
|
|
bgpopt.bgpopt_type,
|
|
bgpopt.bgpopt_len));
|
|
|
|
/* now let's decode the options we know*/
|
|
switch(bgpopt.bgpopt_type) {
|
|
|
|
case BGP_OPT_CAP:
|
|
bgp_capabilities_print(ndo, &opt[i+BGP_OPT_SIZE],
|
|
bgpopt.bgpopt_len);
|
|
break;
|
|
|
|
case BGP_OPT_AUTH:
|
|
default:
|
|
ND_PRINT((ndo, "\n\t no decoder for option %u",
|
|
bgpopt.bgpopt_type));
|
|
break;
|
|
}
|
|
i += BGP_OPT_SIZE + bgpopt.bgpopt_len;
|
|
}
|
|
return;
|
|
trunc:
|
|
ND_PRINT((ndo, "[|BGP]"));
|
|
}
|
|
|
|
static void
|
|
bgp_update_print(netdissect_options *ndo,
|
|
const u_char *dat, int length)
|
|
{
|
|
struct bgp bgp;
|
|
const u_char *p;
|
|
int withdrawn_routes_len;
|
|
int len;
|
|
int i;
|
|
char tokbuf[TOKBUFSIZE];
|
|
#ifndef INET6
|
|
char buf[MAXHOSTNAMELEN + 100];
|
|
int wpfx;
|
|
#endif
|
|
|
|
ND_TCHECK2(dat[0], BGP_SIZE);
|
|
if (length < BGP_SIZE)
|
|
goto trunc;
|
|
memcpy(&bgp, dat, BGP_SIZE);
|
|
p = dat + BGP_SIZE; /*XXX*/
|
|
length -= BGP_SIZE;
|
|
|
|
/* Unfeasible routes */
|
|
ND_TCHECK2(p[0], 2);
|
|
if (length < 2)
|
|
goto trunc;
|
|
withdrawn_routes_len = EXTRACT_16BITS(p);
|
|
p += 2;
|
|
length -= 2;
|
|
if (withdrawn_routes_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.
|
|
*/
|
|
ND_TCHECK2(p[0], withdrawn_routes_len);
|
|
if (length < withdrawn_routes_len)
|
|
goto trunc;
|
|
#ifdef INET6
|
|
ND_PRINT((ndo, "\n\t Withdrawn routes: %d bytes", withdrawn_routes_len));
|
|
p += withdrawn_routes_len;
|
|
length -= withdrawn_routes_len;
|
|
#else
|
|
if (withdrawn_routes_len < 2)
|
|
goto trunc;
|
|
length -= 2;
|
|
withdrawn_routes_len -= 2;
|
|
|
|
|
|
ND_PRINT((ndo, "\n\t Withdrawn routes:"));
|
|
|
|
while(withdrawn_routes_len > 0) {
|
|
wpfx = decode_prefix4(ndo, p, withdrawn_routes_len, buf, sizeof(buf));
|
|
if (wpfx == -1) {
|
|
ND_PRINT((ndo, "\n\t (illegal prefix length)"));
|
|
break;
|
|
} else if (wpfx == -2)
|
|
goto trunc;
|
|
else if (wpfx == -3)
|
|
goto trunc; /* bytes left, but not enough */
|
|
else {
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
p += wpfx;
|
|
length -= wpfx;
|
|
withdrawn_routes_len -= wpfx;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
ND_TCHECK2(p[0], 2);
|
|
if (length < 2)
|
|
goto trunc;
|
|
len = EXTRACT_16BITS(p);
|
|
p += 2;
|
|
length -= 2;
|
|
|
|
if (withdrawn_routes_len == 0 && len == 0 && length == 0) {
|
|
/* No withdrawn routes, no path attributes, no NLRI */
|
|
ND_PRINT((ndo, "\n\t End-of-Rib Marker (empty NLRI)"));
|
|
return;
|
|
}
|
|
|
|
if (len) {
|
|
/* do something more useful!*/
|
|
while (len) {
|
|
int aflags, atype, alenlen, alen;
|
|
|
|
ND_TCHECK2(p[0], 2);
|
|
if (len < 2)
|
|
goto trunc;
|
|
if (length < 2)
|
|
goto trunc;
|
|
aflags = *p;
|
|
atype = *(p + 1);
|
|
p += 2;
|
|
len -= 2;
|
|
length -= 2;
|
|
alenlen = bgp_attr_lenlen(aflags, p);
|
|
ND_TCHECK2(p[0], alenlen);
|
|
if (len < alenlen)
|
|
goto trunc;
|
|
if (length < alenlen)
|
|
goto trunc;
|
|
alen = bgp_attr_len(aflags, p);
|
|
p += alenlen;
|
|
len -= alenlen;
|
|
length -= alenlen;
|
|
|
|
ND_PRINT((ndo, "\n\t %s (%u), length: %u",
|
|
tok2strbuf(bgp_attr_values, "Unknown Attribute",
|
|
atype,
|
|
tokbuf, sizeof(tokbuf)),
|
|
atype,
|
|
alen));
|
|
|
|
if (aflags) {
|
|
ND_PRINT((ndo, ", Flags [%s%s%s%s",
|
|
aflags & 0x80 ? "O" : "",
|
|
aflags & 0x40 ? "T" : "",
|
|
aflags & 0x20 ? "P" : "",
|
|
aflags & 0x10 ? "E" : ""));
|
|
if (aflags & 0xf)
|
|
ND_PRINT((ndo, "+%x", aflags & 0xf));
|
|
ND_PRINT((ndo, "]: "));
|
|
}
|
|
if (len < alen)
|
|
goto trunc;
|
|
if (length < alen)
|
|
goto trunc;
|
|
if (!bgp_attr_print(ndo, atype, p, alen))
|
|
goto trunc;
|
|
p += alen;
|
|
len -= alen;
|
|
length -= alen;
|
|
}
|
|
}
|
|
|
|
if (length) {
|
|
/*
|
|
* XXX - what if they're using the "Advertisement of
|
|
* Multiple Paths in BGP" feature:
|
|
*
|
|
* https://datatracker.ietf.org/doc/draft-ietf-idr-add-paths/
|
|
*
|
|
* http://tools.ietf.org/html/draft-ietf-idr-add-paths-06
|
|
*/
|
|
ND_PRINT((ndo, "\n\t Updated routes:"));
|
|
while (length) {
|
|
char buf[MAXHOSTNAMELEN + 100];
|
|
i = decode_prefix4(ndo, p, length, buf, sizeof(buf));
|
|
if (i == -1) {
|
|
ND_PRINT((ndo, "\n\t (illegal prefix length)"));
|
|
break;
|
|
} else if (i == -2)
|
|
goto trunc;
|
|
else if (i == -3)
|
|
goto trunc; /* bytes left, but not enough */
|
|
else {
|
|
ND_PRINT((ndo, "\n\t %s", buf));
|
|
p += i;
|
|
length -= i;
|
|
}
|
|
}
|
|
}
|
|
return;
|
|
trunc:
|
|
ND_PRINT((ndo, "[|BGP]"));
|
|
}
|
|
|
|
static void
|
|
bgp_notification_print(netdissect_options *ndo,
|
|
const u_char *dat, int length)
|
|
{
|
|
struct bgp_notification bgpn;
|
|
const u_char *tptr;
|
|
char tokbuf[TOKBUFSIZE];
|
|
char tokbuf2[TOKBUFSIZE];
|
|
|
|
ND_TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
|
|
memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
|
|
|
|
/* some little sanity checking */
|
|
if (length<BGP_NOTIFICATION_SIZE)
|
|
return;
|
|
|
|
ND_PRINT((ndo, ", %s (%u)",
|
|
tok2strbuf(bgp_notify_major_values, "Unknown Error",
|
|
bgpn.bgpn_major, tokbuf, sizeof(tokbuf)),
|
|
bgpn.bgpn_major));
|
|
|
|
switch (bgpn.bgpn_major) {
|
|
|
|
case BGP_NOTIFY_MAJOR_MSG:
|
|
ND_PRINT((ndo, ", subcode %s (%u)",
|
|
tok2strbuf(bgp_notify_minor_msg_values, "Unknown",
|
|
bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
|
|
bgpn.bgpn_minor));
|
|
break;
|
|
case BGP_NOTIFY_MAJOR_OPEN:
|
|
ND_PRINT((ndo, ", subcode %s (%u)",
|
|
tok2strbuf(bgp_notify_minor_open_values, "Unknown",
|
|
bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
|
|
bgpn.bgpn_minor));
|
|
break;
|
|
case BGP_NOTIFY_MAJOR_UPDATE:
|
|
ND_PRINT((ndo, ", subcode %s (%u)",
|
|
tok2strbuf(bgp_notify_minor_update_values, "Unknown",
|
|
bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
|
|
bgpn.bgpn_minor));
|
|
break;
|
|
case BGP_NOTIFY_MAJOR_CAP:
|
|
ND_PRINT((ndo, " subcode %s (%u)",
|
|
tok2strbuf(bgp_notify_minor_cap_values, "Unknown",
|
|
bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
|
|
bgpn.bgpn_minor));
|
|
case BGP_NOTIFY_MAJOR_CEASE:
|
|
ND_PRINT((ndo, ", subcode %s (%u)",
|
|
tok2strbuf(bgp_notify_minor_cease_values, "Unknown",
|
|
bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
|
|
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;
|
|
ND_TCHECK2(*tptr, 7);
|
|
ND_PRINT((ndo, ", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
|
|
tok2strbuf(af_values, "Unknown",
|
|
EXTRACT_16BITS(tptr), tokbuf, sizeof(tokbuf)),
|
|
EXTRACT_16BITS(tptr),
|
|
tok2strbuf(bgp_safi_values, "Unknown", *(tptr+2),
|
|
tokbuf2, sizeof(tokbuf)),
|
|
*(tptr+2),
|
|
EXTRACT_32BITS(tptr+3)));
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return;
|
|
trunc:
|
|
ND_PRINT((ndo, "[|BGP]"));
|
|
}
|
|
|
|
static void
|
|
bgp_route_refresh_print(netdissect_options *ndo,
|
|
const u_char *pptr, int len) {
|
|
|
|
const struct bgp_route_refresh *bgp_route_refresh_header;
|
|
char tokbuf[TOKBUFSIZE];
|
|
char tokbuf2[TOKBUFSIZE];
|
|
|
|
ND_TCHECK2(pptr[0], BGP_ROUTE_REFRESH_SIZE);
|
|
|
|
/* some little sanity checking */
|
|
if (len<BGP_ROUTE_REFRESH_SIZE)
|
|
return;
|
|
|
|
bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
|
|
|
|
ND_PRINT((ndo, "\n\t AFI %s (%u), SAFI %s (%u)",
|
|
tok2strbuf(af_values,"Unknown",
|
|
/* this stinks but the compiler pads the structure
|
|
* weird */
|
|
EXTRACT_16BITS(&bgp_route_refresh_header->afi),
|
|
tokbuf, sizeof(tokbuf)),
|
|
EXTRACT_16BITS(&bgp_route_refresh_header->afi),
|
|
tok2strbuf(bgp_safi_values,"Unknown",
|
|
bgp_route_refresh_header->safi,
|
|
tokbuf2, sizeof(tokbuf2)),
|
|
bgp_route_refresh_header->safi));
|
|
|
|
if (ndo->ndo_vflag > 1) {
|
|
ND_TCHECK2(*pptr, len);
|
|
print_unknown_data(ndo, pptr, "\n\t ", len);
|
|
}
|
|
|
|
return;
|
|
trunc:
|
|
ND_PRINT((ndo, "[|BGP]"));
|
|
}
|
|
|
|
static int
|
|
bgp_header_print(netdissect_options *ndo,
|
|
const u_char *dat, int length)
|
|
{
|
|
struct bgp bgp;
|
|
char tokbuf[TOKBUFSIZE];
|
|
|
|
ND_TCHECK2(dat[0], BGP_SIZE);
|
|
memcpy(&bgp, dat, BGP_SIZE);
|
|
ND_PRINT((ndo, "\n\t%s Message (%u), length: %u",
|
|
tok2strbuf(bgp_msg_values, "Unknown", bgp.bgp_type,
|
|
tokbuf, sizeof(tokbuf)),
|
|
bgp.bgp_type,
|
|
length));
|
|
|
|
switch (bgp.bgp_type) {
|
|
case BGP_OPEN:
|
|
bgp_open_print(ndo, dat, length);
|
|
break;
|
|
case BGP_UPDATE:
|
|
bgp_update_print(ndo, dat, length);
|
|
break;
|
|
case BGP_NOTIFICATION:
|
|
bgp_notification_print(ndo, dat, length);
|
|
break;
|
|
case BGP_KEEPALIVE:
|
|
break;
|
|
case BGP_ROUTE_REFRESH:
|
|
bgp_route_refresh_print(ndo, dat, length);
|
|
break;
|
|
default:
|
|
/* we have no decoder for the BGP message */
|
|
ND_TCHECK2(*dat, length);
|
|
ND_PRINT((ndo, "\n\t no Message %u decoder", bgp.bgp_type));
|
|
print_unknown_data(ndo, dat, "\n\t ", length);
|
|
break;
|
|
}
|
|
return 1;
|
|
trunc:
|
|
ND_PRINT((ndo, "[|BGP]"));
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
bgp_print(netdissect_options *ndo,
|
|
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;
|
|
uint16_t hlen;
|
|
char tokbuf[TOKBUFSIZE];
|
|
|
|
ep = dat + length;
|
|
if (ndo->ndo_snapend < dat + length)
|
|
ep = ndo->ndo_snapend;
|
|
|
|
ND_PRINT((ndo, ": BGP, length: %u", length));
|
|
|
|
if (ndo->ndo_vflag < 1) /* lets be less chatty */
|
|
return;
|
|
|
|
p = dat;
|
|
start = p;
|
|
while (p < ep) {
|
|
if (!ND_TTEST2(p[0], 1))
|
|
break;
|
|
if (p[0] != 0xff) {
|
|
p++;
|
|
continue;
|
|
}
|
|
|
|
if (!ND_TTEST2(p[0], sizeof(marker)))
|
|
break;
|
|
if (memcmp(p, marker, sizeof(marker)) != 0) {
|
|
p++;
|
|
continue;
|
|
}
|
|
|
|
/* found BGP header */
|
|
ND_TCHECK2(p[0], BGP_SIZE); /*XXX*/
|
|
memcpy(&bgp, p, BGP_SIZE);
|
|
|
|
if (start != p)
|
|
ND_PRINT((ndo, " [|BGP]"));
|
|
|
|
hlen = ntohs(bgp.bgp_len);
|
|
if (hlen < BGP_SIZE) {
|
|
ND_PRINT((ndo, "\n[|BGP Bogus header length %u < %u]", hlen,
|
|
BGP_SIZE));
|
|
break;
|
|
}
|
|
|
|
if (ND_TTEST2(p[0], hlen)) {
|
|
if (!bgp_header_print(ndo, p, hlen))
|
|
return;
|
|
p += hlen;
|
|
start = p;
|
|
} else {
|
|
ND_PRINT((ndo, "\n[|BGP %s]",
|
|
tok2strbuf(bgp_msg_values,
|
|
"Unknown Message Type",
|
|
bgp.bgp_type,
|
|
tokbuf, sizeof(tokbuf))));
|
|
break;
|
|
}
|
|
}
|
|
|
|
return;
|
|
|
|
trunc:
|
|
ND_PRINT((ndo, " [|BGP]"));
|
|
}
|
|
|
|
/*
|
|
* Local Variables:
|
|
* c-style: whitesmith
|
|
* c-basic-offset: 4
|
|
* End:
|
|
*/
|