diff options
Diffstat (limited to 'contrib/tcpdump/print-bgp.c')
-rw-r--r-- | contrib/tcpdump/print-bgp.c | 2079 |
1 files changed, 0 insertions, 2079 deletions
diff --git a/contrib/tcpdump/print-bgp.c b/contrib/tcpdump/print-bgp.c deleted file mode 100644 index 34aa798..0000000 --- a/contrib/tcpdump/print-bgp.c +++ /dev/null @@ -1,2079 +0,0 @@ -/* - * 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. - */ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#ifndef lint -static const char rcsid[] _U_ = - "@(#) $Header: /tcpdump/master/tcpdump/print-bgp.c,v 1.91.2.12 2007/07/14 22:26:35 guy Exp $"; -#endif - -#include <tcpdump-stdinc.h> - -#include <stdio.h> -#include <string.h> - -#include "interface.h" -#include "decode_prefix.h" -#include "addrtoname.h" -#include "extract.h" -#include "bgp.h" -#include "l2vpn.h" -#include "af.h" - -struct bgp { - u_int8_t bgp_marker[16]; - u_int16_t bgp_len; - u_int8_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 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 { - u_int8_t bgpo_marker[16]; - u_int16_t bgpo_len; - u_int8_t bgpo_type; - u_int8_t bgpo_version; - u_int16_t bgpo_myas; - u_int16_t bgpo_holdtime; - u_int32_t bgpo_id; - u_int8_t bgpo_optlen; - /* options should follow */ -}; -#define BGP_OPEN_SIZE 29 /* unaligned */ - -struct bgp_opt { - u_int8_t bgpopt_type; - u_int8_t bgpopt_len; - /* variable length */ -}; -#define BGP_OPT_SIZE 2 /* some compilers may pad to 4 bytes */ - -#define BGP_UPDATE_MINSIZE 23 - -struct bgp_notification { - u_int8_t bgpn_marker[16]; - u_int16_t bgpn_len; - u_int8_t bgpn_type; - u_int8_t bgpn_major; - u_int8_t bgpn_minor; -}; -#define BGP_NOTIFICATION_SIZE 21 /* unaligned */ - -struct bgp_route_refresh { - u_int8_t bgp_marker[16]; - u_int16_t len; - u_int8_t type; - u_int8_t afi[2]; /* the compiler messes this structure up */ - u_int8_t res; /* when doing misaligned sequences of int8 and int16 */ - u_int8_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 - -struct bgp_attr { - u_int8_t bgpa_flags; - u_int8_t bgpa_type; - union { - u_int8_t len; - u_int16_t elen; - } bgpa_len; -#define bgp_attr_len(p) \ - (((p)->bgpa_flags & 0x10) ? \ - EXTRACT_16BITS(&(p)->bgpa_len.elen) : (p)->bgpa_len.len) -#define bgp_attr_off(p) \ - (((p)->bgpa_flags & 0x10) ? 4 : 3) -}; - -#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_ATTR_SET 128 /* draft-marques-ppvpn-ibgp */ - -#define BGP_MP_NLRI_MINSIZE 3 /* End of RIB Marker detection */ - -static struct tok bgp_attr_values[] = { - { BGPTYPE_ORIGIN, "Origin"}, - { BGPTYPE_AS_PATH, "AS 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_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_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 */ - -static 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 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 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 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 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 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 struct tok bgp_notify_minor_msg_values[] = { - { 1, "Connection Not Synchronized"}, - { 2, "Bad Message Length"}, - { 3, "Bad Message Type"}, - { 0, NULL} -}; - -static 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"}, - { 0, NULL} -}; - -static 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 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 struct tok bgp_origin_values[] = { - { 0, "IGP"}, - { 1, "EGP"}, - { 2, "Incomplete"}, - { 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 -#define SAFNUM_TUNNEL 64 /* XXX */ -#define SAFNUM_VPLS 65 /* XXX */ -#define SAFNUM_MDT 66 /* XXX */ -/* 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 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"}, /* draft-marques-ppvpn-rt-constrain-01.txt */ - { 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_CISCO_MCAST 0x0009 /* cisco proprietary */ - -#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 */ - -/* 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 struct tok bgp_extd_comm_flag_values[] = { - { 0x8000, "vendor-specific"}, - { 0x4000, "non-transitive"}, - { 0, NULL}, -}; - -static 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_CISCO_MCAST, "mdt-group"}, - { 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)" }, - { 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 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 }, -}; - -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 - */ - - if (24 > plen) - return -1; - - 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 */ -char * -bgp_vpn_rd_print (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)) { - - /* 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 (%u.%u.%u.%u:%u)", - 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(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 */ - - 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)); - 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 */ - - if ((24+64) > plen) - return -1; - - 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; -} - -/* - * 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(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); - buf[0]='\0'; - 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 */ - 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; - 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) { - 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; - -trunc: - return -2; -} - -#ifdef INET6 -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 */ - - if (24 > plen) - return -1; - - 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 */ - - if ((24+64) > plen) - return -1; - - 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 -decode_clnp_prefix(const u_char *pptr, char *buf, u_int buflen) -{ - u_int8_t addr[19]; - u_int plen; - - TCHECK(pptr[0]); - plen = pptr[0]; /* get prefix length */ - - if (152 < 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[(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(const u_char *pptr, char *buf, u_int buflen) -{ - u_int8_t addr[19]; - u_int plen; - - 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)); - 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(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; -} - -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, nhlen; - 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]; - char tokbuf[TOKBUFSIZE]; - - tptr = pptr; - tlen=len; - - switch (attr->bgpa_type) { - case BGPTYPE_ORIGIN: - if (len != 1) - printf("invalid len"); - else { - TCHECK(*tptr); - printf("%s", tok2strbuf(bgp_origin_values, - "Unknown Origin Typecode", - tptr[0], - tokbuf, sizeof(tokbuf))); - } - 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", tok2strbuf(bgp_as_path_segment_open_values, - "?", tptr[0], - tokbuf, sizeof(tokbuf))); - 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", tok2strbuf(bgp_as_path_segment_close_values, - "?", tptr[0], - tokbuf, sizeof(tokbuf))); - 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)", - 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): -#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_RT_ROUTING_INFO): - 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: - TCHECK2(tptr[0], tlen); - printf("\n\t no AFI %u / SAFI %u decoder",af,safi); - if (vflag <= 1) - print_unknown_data(tptr,"\n\t ",tlen); - goto done; - break; - } - - tptr +=3; - - TCHECK(tptr[0]); - nhlen = tptr[0]; - tlen = nhlen; - tptr++; - - if (tlen) { - printf("\n\t nexthop: "); - while (tlen > 0) { - 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): - 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 (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)) { - 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; -#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_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 (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)) { - 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; -#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)) { - 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 (AFNUM_NSAP<<8 | SAFNUM_UNICAST): - case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST): - case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST): - TCHECK2(tptr[0], tlen); - printf("%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) { - printf("invalid len"); - tlen = 0; - } else { - TCHECK2(tptr[0], tlen); - printf("RD: %s, %s", - bgp_vpn_rd_print(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) - printf(" = %s", getname(tptr+BGP_VPN_RD_LEN+4)); -#ifdef INET6 - /* rfc1888 mapped IPv6 address ? */ - else if (EXTRACT_24BITS(tptr+BGP_VPN_RD_LEN) == 0x350000) - printf(" = %s", getname6(tptr+BGP_VPN_RD_LEN+3)); -#endif - tptr += tlen; - tlen = 0; - } - break; - default: - TCHECK2(tptr[0], tlen); - printf("no AFI %u/SAFI %u decoder",af,safi); - if (vflag <= 1) - print_unknown_data(tptr,"\n\t ",tlen); - tptr += tlen; - tlen = 0; - goto done; - break; - } - } - } - printf(", nh-length: %u", nhlen); - 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<<8 | safi) { - case (AFNUM_INET<<8 | SAFNUM_UNICAST): - case (AFNUM_INET<<8 | SAFNUM_MULTICAST): - case (AFNUM_INET<<8 | 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 (AFNUM_INET<<8 | 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 (AFNUM_INET<<8 | SAFNUM_VPNUNICAST): - case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST): - case (AFNUM_INET<<8 | 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 (AFNUM_INET<<8 | 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; -#ifdef INET6 - case (AFNUM_INET6<<8 | SAFNUM_UNICAST): - case (AFNUM_INET6<<8 | SAFNUM_MULTICAST): - case (AFNUM_INET6<<8 | 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 (AFNUM_INET6<<8 | 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 (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST): - case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST): - case (AFNUM_INET6<<8 | 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 (AFNUM_INET6<<8 | 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; -#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(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; - case (AFNUM_NSAP<<8 | SAFNUM_UNICAST): - case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST): - case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST): - advance = decode_clnp_prefix(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 (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST): - case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST): - case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST): - advance = decode_labeled_vpn_clnp_prefix(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,tlen); - printf("\n\t no AFI %u / SAFI %u decoder",af,safi); - if (vflag <= 1) - print_unknown_data(tptr,"\n\t ",tlen); - advance = 0; - tptr = pptr + len; - break; - } - if (advance < 0) - break; - tptr += advance; - } - done: - break; - - case BGPTYPE_MP_UNREACH_NLRI: - TCHECK2(tptr[0], BGP_MP_NLRI_MINSIZE); - af = EXTRACT_16BITS(tptr); - safi = tptr[2]; - - printf("\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) - printf("\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(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 (AFNUM_INET<<8 | 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 (AFNUM_INET<<8 | SAFNUM_VPNUNICAST): - case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST): - case (AFNUM_INET<<8 | 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; -#ifdef INET6 - case (AFNUM_INET6<<8 | SAFNUM_UNICAST): - case (AFNUM_INET6<<8 | SAFNUM_MULTICAST): - case (AFNUM_INET6<<8 | 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 (AFNUM_INET6<<8 | 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 (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST): - case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST): - case (AFNUM_INET6<<8 | 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; -#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(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; - case (AFNUM_NSAP<<8 | SAFNUM_UNICAST): - case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST): - case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST): - advance = decode_clnp_prefix(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 (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST): - case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST): - case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST): - advance = decode_labeled_vpn_clnp_prefix(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("no AFI %u / SAFI %u decoder",af,safi); - if (vflag <= 1) - print_unknown_data(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) { - 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]", - 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)); - - 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_CISCO_MCAST: - printf(": AS %u, group %s", - EXTRACT_16BITS(tptr+2), - getname(tptr+4)); - 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), - 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: - printf(": %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; - default: - TCHECK2(*tptr,8); - print_unknown_data(tptr,"\n\t ",8); - break; - } - tlen -=8; - tptr +=8; - } - break; - - case BGPTYPE_ATTR_SET: - TCHECK2(tptr[0], 4); - printf("\n\t Origin AS: %u", EXTRACT_32BITS(tptr)); - tptr+=4; - len -=4; - - while (len >= 2 ) { - int alen; - struct bgp_attr bgpa; - - TCHECK2(tptr[0], sizeof(bgpa)); - memcpy(&bgpa, tptr, sizeof(bgpa)); - alen = bgp_attr_len(&bgpa); - tptr += bgp_attr_off(&bgpa); - len -= bgp_attr_off(&bgpa); - - printf("\n\t %s (%u), length: %u", - tok2strbuf(bgp_attr_values, - "Unknown Attribute", bgpa.bgpa_type, - tokbuf, sizeof(tokbuf)), - 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("]: "); - } - /* FIXME check for recursion */ - if (!bgp_attr_print(&bgpa, tptr, alen)) - return 0; - tptr += alen; - len -= alen; - } - 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*/ - TCHECK2(*pptr,len); - 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; - const u_char *opt; - int i,cap_type,cap_len,tcap_len,cap_offset; - char tokbuf[TOKBUFSIZE]; - char tokbuf2[TOKBUFSIZE]; - - TCHECK2(dat[0], BGP_OPEN_SIZE); - memcpy(&bgpo, dat, BGP_OPEN_SIZE); - - 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", - tok2strbuf(bgp_opt_values,"Unknown", - bgpopt.bgpopt_type, - tokbuf, sizeof(tokbuf)), - 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 (%u), length: %u", - tok2strbuf(bgp_capcode_values, "Unknown", - cap_type, tokbuf, sizeof(tokbuf)), - cap_type, - cap_len); - switch(cap_type) { - case BGP_CAPCODE_MP: - printf("\n\t\tAFI %s (%u), SAFI %s (%u)", - tok2strbuf(af_values, "Unknown", - EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2), - tokbuf, sizeof(tokbuf)), - EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2), - tok2strbuf(bgp_safi_values, "Unknown", - opt[i+BGP_OPT_SIZE+5], - tokbuf, sizeof(tokbuf)), - 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", - tok2strbuf(af_values,"Unknown", - EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset), - tokbuf, sizeof(tokbuf)), - EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset), - tok2strbuf(bgp_safi_values,"Unknown", - opt[i+BGP_OPT_SIZE+cap_offset+2], - tokbuf2, sizeof(tokbuf2)), - 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: - TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len); - 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) { - TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len); - 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; - const u_char *p; - int len; - int i; - char tokbuf[TOKBUFSIZE]; - - TCHECK2(dat[0], BGP_SIZE); - memcpy(&bgp, dat, BGP_SIZE); - 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 == 0 && length == BGP_UPDATE_MINSIZE) { - printf("\n\t End-of-Rib Marker (empty NLRI)"); - return; - } - - 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", - tok2strbuf(bgp_attr_values, "Unknown Attribute", - bgpa.bgpa_type, - tokbuf, sizeof(tokbuf)), - 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)"); - break; - } 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; - const u_char *tptr; - char tokbuf[TOKBUFSIZE]; - char tokbuf2[TOKBUFSIZE]; - - TCHECK2(dat[0], BGP_NOTIFICATION_SIZE); - memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE); - - /* some little sanity checking */ - if (length<BGP_NOTIFICATION_SIZE) - return; - - printf(", %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: - printf(", 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: - printf(", 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: - printf(", 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: - printf(" subcode %s (%u)", - tok2strbuf(bgp_notify_minor_cap_values, "Unknown", - bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)), - bgpn.bgpn_minor); - case BGP_NOTIFY_MAJOR_CEASE: - printf(", 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; - TCHECK2(*tptr, 7); - printf(", 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: - printf("[|BGP]"); -} - -static void -bgp_route_refresh_print(const u_char *pptr, int len) { - - const struct bgp_route_refresh *bgp_route_refresh_header; - char tokbuf[TOKBUFSIZE]; - char tokbuf2[TOKBUFSIZE]; - - 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; - - printf("\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 (vflag > 1) { - TCHECK2(*pptr, len); - print_unknown_data(pptr,"\n\t ", len); - } - - return; -trunc: - printf("[|BGP]"); -} - -static int -bgp_header_print(const u_char *dat, int length) -{ - struct bgp bgp; - char tokbuf[TOKBUFSIZE]; - - TCHECK2(dat[0], BGP_SIZE); - memcpy(&bgp, dat, BGP_SIZE); - printf("\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(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 */ - TCHECK2(*dat, length); - 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; - char tokbuf[TOKBUFSIZE]; - - 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 < ep) { - 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]", - tok2strbuf(bgp_msg_values, - "Unknown Message Type", - bgp.bgp_type, - tokbuf, sizeof(tokbuf))); - break; - } - } - - return; - -trunc: - printf(" [|BGP]"); -} |