2 * Copyright (C) 1999 WIDE Project.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * Extensively modified by Hannes Gredler (hannes@juniper.net) for more
30 * complete BGP support.
33 #define NETDISSECT_REWORKED
38 #include <tcpdump-stdinc.h>
43 #include "interface.h"
44 #include "addrtoname.h"
50 uint8_t bgp_marker[16];
54 #define BGP_SIZE 19 /* unaligned */
58 #define BGP_NOTIFICATION 3
59 #define BGP_KEEPALIVE 4
60 #define BGP_ROUTE_REFRESH 5
62 static const struct tok bgp_msg_values[] = {
64 { BGP_UPDATE, "Update"},
65 { BGP_NOTIFICATION, "Notification"},
66 { BGP_KEEPALIVE, "Keepalive"},
67 { BGP_ROUTE_REFRESH, "Route Refresh"},
72 uint8_t bgpo_marker[16];
77 uint16_t bgpo_holdtime;
80 /* options should follow */
82 #define BGP_OPEN_SIZE 29 /* unaligned */
89 #define BGP_OPT_SIZE 2 /* some compilers may pad to 4 bytes */
90 #define BGP_CAP_HEADER_SIZE 2 /* some compilers may pad to 4 bytes */
92 struct bgp_notification {
93 uint8_t bgpn_marker[16];
99 #define BGP_NOTIFICATION_SIZE 21 /* unaligned */
101 struct bgp_route_refresh {
102 uint8_t bgp_marker[16];
105 uint8_t afi[2]; /* the compiler messes this structure up */
106 uint8_t res; /* when doing misaligned sequences of int8 and int16 */
107 uint8_t safi; /* afi should be int16 - so we have to access it using */
108 }; /* EXTRACT_16BITS(&bgp_route_refresh->afi) (sigh) */
109 #define BGP_ROUTE_REFRESH_SIZE 23
111 #define bgp_attr_lenlen(flags, p) \
112 (((flags) & 0x10) ? 2 : 1)
113 #define bgp_attr_len(flags, p) \
114 (((flags) & 0x10) ? EXTRACT_16BITS(p) : *(p))
116 #define BGPTYPE_ORIGIN 1
117 #define BGPTYPE_AS_PATH 2
118 #define BGPTYPE_NEXT_HOP 3
119 #define BGPTYPE_MULTI_EXIT_DISC 4
120 #define BGPTYPE_LOCAL_PREF 5
121 #define BGPTYPE_ATOMIC_AGGREGATE 6
122 #define BGPTYPE_AGGREGATOR 7
123 #define BGPTYPE_COMMUNITIES 8 /* RFC1997 */
124 #define BGPTYPE_ORIGINATOR_ID 9 /* RFC1998 */
125 #define BGPTYPE_CLUSTER_LIST 10 /* RFC1998 */
126 #define BGPTYPE_DPA 11 /* draft-ietf-idr-bgp-dpa */
127 #define BGPTYPE_ADVERTISERS 12 /* RFC1863 */
128 #define BGPTYPE_RCID_PATH 13 /* RFC1863 */
129 #define BGPTYPE_MP_REACH_NLRI 14 /* RFC2283 */
130 #define BGPTYPE_MP_UNREACH_NLRI 15 /* RFC2283 */
131 #define BGPTYPE_EXTD_COMMUNITIES 16 /* draft-ietf-idr-bgp-ext-communities */
132 #define BGPTYPE_AS4_PATH 17 /* RFC4893 */
133 #define BGPTYPE_AGGREGATOR4 18 /* RFC4893 */
134 #define BGPTYPE_PMSI_TUNNEL 22 /* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */
135 #define BGPTYPE_ATTR_SET 128 /* draft-marques-ppvpn-ibgp */
137 #define BGP_MP_NLRI_MINSIZE 3 /* End of RIB Marker detection */
139 static const struct tok bgp_attr_values[] = {
140 { BGPTYPE_ORIGIN, "Origin"},
141 { BGPTYPE_AS_PATH, "AS Path"},
142 { BGPTYPE_AS4_PATH, "AS4 Path"},
143 { BGPTYPE_NEXT_HOP, "Next Hop"},
144 { BGPTYPE_MULTI_EXIT_DISC, "Multi Exit Discriminator"},
145 { BGPTYPE_LOCAL_PREF, "Local Preference"},
146 { BGPTYPE_ATOMIC_AGGREGATE, "Atomic Aggregate"},
147 { BGPTYPE_AGGREGATOR, "Aggregator"},
148 { BGPTYPE_AGGREGATOR4, "Aggregator4"},
149 { BGPTYPE_COMMUNITIES, "Community"},
150 { BGPTYPE_ORIGINATOR_ID, "Originator ID"},
151 { BGPTYPE_CLUSTER_LIST, "Cluster List"},
152 { BGPTYPE_DPA, "DPA"},
153 { BGPTYPE_ADVERTISERS, "Advertisers"},
154 { BGPTYPE_RCID_PATH, "RCID Path / Cluster ID"},
155 { BGPTYPE_MP_REACH_NLRI, "Multi-Protocol Reach NLRI"},
156 { BGPTYPE_MP_UNREACH_NLRI, "Multi-Protocol Unreach NLRI"},
157 { BGPTYPE_EXTD_COMMUNITIES, "Extended Community"},
158 { BGPTYPE_PMSI_TUNNEL, "PMSI Tunnel"},
159 { BGPTYPE_ATTR_SET, "Attribute Set"},
160 { 255, "Reserved for development"},
165 #define BGP_AS_SEQUENCE 2
166 #define BGP_CONFED_AS_SEQUENCE 3 /* draft-ietf-idr-rfc3065bis-01 */
167 #define BGP_CONFED_AS_SET 4 /* draft-ietf-idr-rfc3065bis-01 */
169 #define BGP_AS_SEG_TYPE_MIN BGP_AS_SET
170 #define BGP_AS_SEG_TYPE_MAX BGP_CONFED_AS_SET
172 static const struct tok bgp_as_path_segment_open_values[] = {
173 { BGP_AS_SEQUENCE, ""},
175 { BGP_CONFED_AS_SEQUENCE, "( "},
176 { BGP_CONFED_AS_SET, "({ "},
180 static const struct tok bgp_as_path_segment_close_values[] = {
181 { BGP_AS_SEQUENCE, ""},
183 { BGP_CONFED_AS_SEQUENCE, ")"},
184 { BGP_CONFED_AS_SET, "})"},
188 #define BGP_OPT_AUTH 1
189 #define BGP_OPT_CAP 2
192 static const struct tok bgp_opt_values[] = {
193 { BGP_OPT_AUTH, "Authentication Information"},
194 { BGP_OPT_CAP, "Capabilities Advertisement"},
198 #define BGP_CAPCODE_MP 1
199 #define BGP_CAPCODE_RR 2
200 #define BGP_CAPCODE_ORF 3 /* XXX */
201 #define BGP_CAPCODE_RESTART 64 /* draft-ietf-idr-restart-05 */
202 #define BGP_CAPCODE_AS_NEW 65 /* XXX */
203 #define BGP_CAPCODE_DYN_CAP 67 /* XXX */
204 #define BGP_CAPCODE_RR_CISCO 128
206 static const struct tok bgp_capcode_values[] = {
207 { BGP_CAPCODE_MP, "Multiprotocol Extensions"},
208 { BGP_CAPCODE_RR, "Route Refresh"},
209 { BGP_CAPCODE_ORF, "Cooperative Route Filtering"},
210 { BGP_CAPCODE_RESTART, "Graceful Restart"},
211 { BGP_CAPCODE_AS_NEW, "32-Bit AS Number"},
212 { BGP_CAPCODE_DYN_CAP, "Dynamic Capability"},
213 { BGP_CAPCODE_RR_CISCO, "Route Refresh (Cisco)"},
217 #define BGP_NOTIFY_MAJOR_MSG 1
218 #define BGP_NOTIFY_MAJOR_OPEN 2
219 #define BGP_NOTIFY_MAJOR_UPDATE 3
220 #define BGP_NOTIFY_MAJOR_HOLDTIME 4
221 #define BGP_NOTIFY_MAJOR_FSM 5
222 #define BGP_NOTIFY_MAJOR_CEASE 6
223 #define BGP_NOTIFY_MAJOR_CAP 7
225 static const struct tok bgp_notify_major_values[] = {
226 { BGP_NOTIFY_MAJOR_MSG, "Message Header Error"},
227 { BGP_NOTIFY_MAJOR_OPEN, "OPEN Message Error"},
228 { BGP_NOTIFY_MAJOR_UPDATE, "UPDATE Message Error"},
229 { BGP_NOTIFY_MAJOR_HOLDTIME,"Hold Timer Expired"},
230 { BGP_NOTIFY_MAJOR_FSM, "Finite State Machine Error"},
231 { BGP_NOTIFY_MAJOR_CEASE, "Cease"},
232 { BGP_NOTIFY_MAJOR_CAP, "Capability Message Error"},
236 /* draft-ietf-idr-cease-subcode-02 */
237 #define BGP_NOTIFY_MINOR_CEASE_MAXPRFX 1
238 static const struct tok bgp_notify_minor_cease_values[] = {
239 { BGP_NOTIFY_MINOR_CEASE_MAXPRFX, "Maximum Number of Prefixes Reached"},
240 { 2, "Administratively Shutdown"},
241 { 3, "Peer Unconfigured"},
242 { 4, "Administratively Reset"},
243 { 5, "Connection Rejected"},
244 { 6, "Other Configuration Change"},
245 { 7, "Connection Collision Resolution"},
249 static const struct tok bgp_notify_minor_msg_values[] = {
250 { 1, "Connection Not Synchronized"},
251 { 2, "Bad Message Length"},
252 { 3, "Bad Message Type"},
256 static const struct tok bgp_notify_minor_open_values[] = {
257 { 1, "Unsupported Version Number"},
259 { 3, "Bad BGP Identifier"},
260 { 4, "Unsupported Optional Parameter"},
261 { 5, "Authentication Failure"},
262 { 6, "Unacceptable Hold Time"},
263 { 7, "Capability Message Error"},
267 static const struct tok bgp_notify_minor_update_values[] = {
268 { 1, "Malformed Attribute List"},
269 { 2, "Unrecognized Well-known Attribute"},
270 { 3, "Missing Well-known Attribute"},
271 { 4, "Attribute Flags Error"},
272 { 5, "Attribute Length Error"},
273 { 6, "Invalid ORIGIN Attribute"},
274 { 7, "AS Routing Loop"},
275 { 8, "Invalid NEXT_HOP Attribute"},
276 { 9, "Optional Attribute Error"},
277 { 10, "Invalid Network Field"},
278 { 11, "Malformed AS_PATH"},
282 static const struct tok bgp_notify_minor_cap_values[] = {
283 { 1, "Invalid Action Value" },
284 { 2, "Invalid Capability Length" },
285 { 3, "Malformed Capability Value" },
286 { 4, "Unsupported Capability Code" },
290 static const struct tok bgp_origin_values[] = {
297 #define BGP_PMSI_TUNNEL_RSVP_P2MP 1
298 #define BGP_PMSI_TUNNEL_LDP_P2MP 2
299 #define BGP_PMSI_TUNNEL_PIM_SSM 3
300 #define BGP_PMSI_TUNNEL_PIM_SM 4
301 #define BGP_PMSI_TUNNEL_PIM_BIDIR 5
302 #define BGP_PMSI_TUNNEL_INGRESS 6
303 #define BGP_PMSI_TUNNEL_LDP_MP2MP 7
305 static const struct tok bgp_pmsi_tunnel_values[] = {
306 { BGP_PMSI_TUNNEL_RSVP_P2MP, "RSVP-TE P2MP LSP"},
307 { BGP_PMSI_TUNNEL_LDP_P2MP, "LDP P2MP LSP"},
308 { BGP_PMSI_TUNNEL_PIM_SSM, "PIM-SSM Tree"},
309 { BGP_PMSI_TUNNEL_PIM_SM, "PIM-SM Tree"},
310 { BGP_PMSI_TUNNEL_PIM_BIDIR, "PIM-Bidir Tree"},
311 { BGP_PMSI_TUNNEL_INGRESS, "Ingress Replication"},
312 { BGP_PMSI_TUNNEL_LDP_MP2MP, "LDP MP2MP LSP"},
316 static const struct tok bgp_pmsi_flag_values[] = {
317 { 0x01, "Leaf Information required"},
322 /* Subsequent address family identifier, RFC2283 section 7 */
324 #define SAFNUM_UNICAST 1
325 #define SAFNUM_MULTICAST 2
326 #define SAFNUM_UNIMULTICAST 3
327 /* labeled BGP RFC3107 */
328 #define SAFNUM_LABUNICAST 4
329 /* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */
330 #define SAFNUM_MULTICAST_VPN 5
331 #define SAFNUM_TUNNEL 64 /* XXX */
332 #define SAFNUM_VPLS 65 /* XXX */
333 /* draft-nalawade-idr-mdt-safi-03 */
334 #define SAFNUM_MDT 66
335 /* Section 4.3.4 of draft-rosen-rfc2547bis-03.txt */
336 #define SAFNUM_VPNUNICAST 128
337 #define SAFNUM_VPNMULTICAST 129
338 #define SAFNUM_VPNUNIMULTICAST 130
339 /* draft-marques-ppvpn-rt-constrain-01.txt */
340 #define SAFNUM_RT_ROUTING_INFO 132
342 #define BGP_VPN_RD_LEN 8
344 static const struct tok bgp_safi_values[] = {
345 { SAFNUM_RES, "Reserved"},
346 { SAFNUM_UNICAST, "Unicast"},
347 { SAFNUM_MULTICAST, "Multicast"},
348 { SAFNUM_UNIMULTICAST, "Unicast+Multicast"},
349 { SAFNUM_LABUNICAST, "labeled Unicast"},
350 { SAFNUM_TUNNEL, "Tunnel"},
351 { SAFNUM_VPLS, "VPLS"},
352 { SAFNUM_MDT, "MDT"},
353 { SAFNUM_VPNUNICAST, "labeled VPN Unicast"},
354 { SAFNUM_VPNMULTICAST, "labeled VPN Multicast"},
355 { SAFNUM_VPNUNIMULTICAST, "labeled VPN Unicast+Multicast"},
356 { SAFNUM_RT_ROUTING_INFO, "Route Target Routing Information"},
357 { SAFNUM_MULTICAST_VPN, "Multicast VPN"},
361 /* well-known community */
362 #define BGP_COMMUNITY_NO_EXPORT 0xffffff01
363 #define BGP_COMMUNITY_NO_ADVERT 0xffffff02
364 #define BGP_COMMUNITY_NO_EXPORT_SUBCONFED 0xffffff03
366 /* Extended community type - draft-ietf-idr-bgp-ext-communities-05 */
367 #define BGP_EXT_COM_RT_0 0x0002 /* Route Target,Format AS(2bytes):AN(4bytes) */
368 #define BGP_EXT_COM_RT_1 0x0102 /* Route Target,Format IP address:AN(2bytes) */
369 #define BGP_EXT_COM_RT_2 0x0202 /* Route Target,Format AN(4bytes):local(2bytes) */
370 #define BGP_EXT_COM_RO_0 0x0003 /* Route Origin,Format AS(2bytes):AN(4bytes) */
371 #define BGP_EXT_COM_RO_1 0x0103 /* Route Origin,Format IP address:AN(2bytes) */
372 #define BGP_EXT_COM_RO_2 0x0203 /* Route Origin,Format AN(4bytes):local(2bytes) */
373 #define BGP_EXT_COM_LINKBAND 0x4004 /* Link Bandwidth,Format AS(2B):Bandwidth(4B) */
374 /* rfc2547 bgp-mpls-vpns */
375 #define BGP_EXT_COM_VPN_ORIGIN 0x0005 /* OSPF Domain ID / VPN of Origin - draft-rosen-vpns-ospf-bgp-mpls */
376 #define BGP_EXT_COM_VPN_ORIGIN2 0x0105 /* duplicate - keep for backwards compatability */
377 #define BGP_EXT_COM_VPN_ORIGIN3 0x0205 /* duplicate - keep for backwards compatability */
378 #define BGP_EXT_COM_VPN_ORIGIN4 0x8005 /* duplicate - keep for backwards compatability */
380 #define BGP_EXT_COM_OSPF_RTYPE 0x0306 /* OSPF Route Type,Format Area(4B):RouteType(1B):Options(1B) */
381 #define BGP_EXT_COM_OSPF_RTYPE2 0x8000 /* duplicate - keep for backwards compatability */
383 #define BGP_EXT_COM_OSPF_RID 0x0107 /* OSPF Router ID,Format RouterID(4B):Unused(2B) */
384 #define BGP_EXT_COM_OSPF_RID2 0x8001 /* duplicate - keep for backwards compatability */
386 #define BGP_EXT_COM_L2INFO 0x800a /* draft-kompella-ppvpn-l2vpn */
388 #define BGP_EXT_COM_SOURCE_AS 0x0009 /* RFC-ietf-l3vpn-2547bis-mcast-bgp-08.txt */
389 #define BGP_EXT_COM_VRF_RT_IMP 0x010b /* RFC-ietf-l3vpn-2547bis-mcast-bgp-08.txt */
390 #define BGP_EXT_COM_L2VPN_RT_0 0x000a /* L2VPN Identifier,Format AS(2bytes):AN(4bytes) */
391 #define BGP_EXT_COM_L2VPN_RT_1 0xF10a /* L2VPN Identifier,Format IP address:AN(2bytes) */
394 /* http://www.cisco.com/en/US/tech/tk436/tk428/technologies_tech_note09186a00801eb09a.shtml */
395 #define BGP_EXT_COM_EIGRP_GEN 0x8800
396 #define BGP_EXT_COM_EIGRP_METRIC_AS_DELAY 0x8801
397 #define BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW 0x8802
398 #define BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU 0x8803
399 #define BGP_EXT_COM_EIGRP_EXT_REMAS_REMID 0x8804
400 #define BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC 0x8805
402 static const struct tok bgp_extd_comm_flag_values[] = {
403 { 0x8000, "vendor-specific"},
404 { 0x4000, "non-transitive"},
408 static const struct tok bgp_extd_comm_subtype_values[] = {
409 { BGP_EXT_COM_RT_0, "target"},
410 { BGP_EXT_COM_RT_1, "target"},
411 { BGP_EXT_COM_RT_2, "target"},
412 { BGP_EXT_COM_RO_0, "origin"},
413 { BGP_EXT_COM_RO_1, "origin"},
414 { BGP_EXT_COM_RO_2, "origin"},
415 { BGP_EXT_COM_LINKBAND, "link-BW"},
416 { BGP_EXT_COM_VPN_ORIGIN, "ospf-domain"},
417 { BGP_EXT_COM_VPN_ORIGIN2, "ospf-domain"},
418 { BGP_EXT_COM_VPN_ORIGIN3, "ospf-domain"},
419 { BGP_EXT_COM_VPN_ORIGIN4, "ospf-domain"},
420 { BGP_EXT_COM_OSPF_RTYPE, "ospf-route-type"},
421 { BGP_EXT_COM_OSPF_RTYPE2, "ospf-route-type"},
422 { BGP_EXT_COM_OSPF_RID, "ospf-router-id"},
423 { BGP_EXT_COM_OSPF_RID2, "ospf-router-id"},
424 { BGP_EXT_COM_L2INFO, "layer2-info"},
425 { BGP_EXT_COM_EIGRP_GEN , "eigrp-general-route (flag, tag)" },
426 { BGP_EXT_COM_EIGRP_METRIC_AS_DELAY , "eigrp-route-metric (AS, delay)" },
427 { BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW , "eigrp-route-metric (reliability, nexthop, bandwidth)" },
428 { BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU , "eigrp-route-metric (load, MTU)" },
429 { BGP_EXT_COM_EIGRP_EXT_REMAS_REMID , "eigrp-external-route (remote-AS, remote-ID)" },
430 { BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC , "eigrp-external-route (remote-proto, remote-metric)" },
431 { BGP_EXT_COM_SOURCE_AS, "source-AS" },
432 { BGP_EXT_COM_VRF_RT_IMP, "vrf-route-import"},
433 { BGP_EXT_COM_L2VPN_RT_0, "l2vpn-id"},
434 { BGP_EXT_COM_L2VPN_RT_1, "l2vpn-id"},
438 /* OSPF codes for BGP_EXT_COM_OSPF_RTYPE draft-rosen-vpns-ospf-bgp-mpls */
439 #define BGP_OSPF_RTYPE_RTR 1 /* OSPF Router LSA */
440 #define BGP_OSPF_RTYPE_NET 2 /* OSPF Network LSA */
441 #define BGP_OSPF_RTYPE_SUM 3 /* OSPF Summary LSA */
442 #define BGP_OSPF_RTYPE_EXT 5 /* OSPF External LSA, note that ASBR doesn't apply to MPLS-VPN */
443 #define BGP_OSPF_RTYPE_NSSA 7 /* OSPF NSSA External*/
444 #define BGP_OSPF_RTYPE_SHAM 129 /* OSPF-MPLS-VPN Sham link */
445 #define BGP_OSPF_RTYPE_METRIC_TYPE 0x1 /* LSB of RTYPE Options Field */
447 static const struct tok bgp_extd_comm_ospf_rtype_values[] = {
448 { BGP_OSPF_RTYPE_RTR, "Router" },
449 { BGP_OSPF_RTYPE_NET, "Network" },
450 { BGP_OSPF_RTYPE_SUM, "Summary" },
451 { BGP_OSPF_RTYPE_EXT, "External" },
452 { BGP_OSPF_RTYPE_NSSA,"NSSA External" },
453 { BGP_OSPF_RTYPE_SHAM,"MPLS-VPN Sham" },
457 #define TOKBUFSIZE 128
458 static char astostr[20];
463 * Convert an AS number into a string and return string pointer.
465 * Depending on bflag is set or not, AS number is converted into ASDOT notation
466 * or plain number notation.
470 as_printf(netdissect_options *ndo,
471 char *str, int size, u_int asnum)
473 if (!ndo->ndo_bflag || asnum <= 0xFFFF) {
474 snprintf(str, size, "%u", asnum);
476 snprintf(str, size, "%u.%u", asnum >> 16, asnum & 0xFFFF);
481 #define ITEMCHECK(minlen) if (itemlen < minlen) goto badtlv;
484 decode_prefix4(netdissect_options *ndo,
485 const u_char *pptr, u_int itemlen, char *buf, u_int buflen)
488 u_int plen, plenbytes;
497 memset(&addr, 0, sizeof(addr));
498 plenbytes = (plen + 7) / 8;
499 ND_TCHECK2(pptr[1], plenbytes);
500 ITEMCHECK(plenbytes);
501 memcpy(&addr, &pptr[1], plenbytes);
503 ((u_char *)&addr)[plenbytes - 1] &=
504 ((0xff00 >> (plen % 8)) & 0xff);
506 snprintf(buf, buflen, "%s/%d", getname(ndo, (u_char *)&addr), plen);
507 return 1 + plenbytes;
517 decode_labeled_prefix4(netdissect_options *ndo,
518 const u_char *pptr, u_int itemlen, char *buf, u_int buflen)
521 u_int plen, plenbytes;
523 /* prefix length and label = 4 bytes */
524 ND_TCHECK2(pptr[0], 4);
526 plen = pptr[0]; /* get prefix length */
528 /* this is one of the weirdnesses of rfc3107
529 the label length (actually the label + COS bits)
530 is added to the prefix length;
531 we also do only read out just one label -
532 there is no real application for advertisement of
533 stacked labels in a single BGP message
539 plen-=24; /* adjust prefixlen - labellength */
545 memset(&addr, 0, sizeof(addr));
546 plenbytes = (plen + 7) / 8;
547 ND_TCHECK2(pptr[4], plenbytes);
548 ITEMCHECK(plenbytes);
549 memcpy(&addr, &pptr[4], plenbytes);
551 ((u_char *)&addr)[plenbytes - 1] &=
552 ((0xff00 >> (plen % 8)) & 0xff);
554 /* the label may get offsetted by 4 bits so lets shift it right */
555 snprintf(buf, buflen, "%s/%d, label:%u %s",
556 getname(ndo, (u_char *)&addr),
558 EXTRACT_24BITS(pptr+1)>>4,
559 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
561 return 4 + plenbytes;
573 * print an ipv4 or ipv6 address into a buffer dependend on address length.
576 bgp_vpn_ip_print(netdissect_options *ndo,
577 const u_char *pptr, u_int addr_length)
580 /* worst case string is s fully formatted v6 address */
581 static char addr[sizeof("1234:5678:89ab:cdef:1234:5678:89ab:cdef")];
584 switch(addr_length) {
585 case (sizeof(struct in_addr) << 3): /* 32 */
586 ND_TCHECK2(pptr[0], sizeof(struct in_addr));
587 snprintf(pos, sizeof(addr), "%s", ipaddr_string(ndo, pptr));
590 case (sizeof(struct in6_addr) << 3): /* 128 */
591 ND_TCHECK2(pptr[0], sizeof(struct in6_addr));
592 snprintf(pos, sizeof(addr), "%s", ip6addr_string(ndo, pptr));
596 snprintf(pos, sizeof(addr), "bogus address length %u", addr_length);
609 * print an multicast s,g entry into a buffer.
610 * the s,g entry is encoded like this.
612 * +-----------------------------------+
613 * | Multicast Source Length (1 octet) |
614 * +-----------------------------------+
615 * | Multicast Source (Variable) |
616 * +-----------------------------------+
617 * | Multicast Group Length (1 octet) |
618 * +-----------------------------------+
619 * | Multicast Group (Variable) |
620 * +-----------------------------------+
622 * return the number of bytes read from the wire.
625 bgp_vpn_sg_print(netdissect_options *ndo,
626 const u_char *pptr, char *buf, u_int buflen)
629 u_int total_length, offset;
633 /* Source address length, encoded in bits */
634 ND_TCHECK2(pptr[0], 1);
635 addr_length = *pptr++;
638 ND_TCHECK2(pptr[0], (addr_length >> 3));
639 total_length += (addr_length >> 3) + 1;
640 offset = strlen(buf);
642 snprintf(buf + offset, buflen - offset, ", Source %s",
643 bgp_vpn_ip_print(ndo, pptr, addr_length));
644 pptr += (addr_length >> 3);
647 /* Group address length, encoded in bits */
648 ND_TCHECK2(pptr[0], 1);
649 addr_length = *pptr++;
652 ND_TCHECK2(pptr[0], (addr_length >> 3));
653 total_length += (addr_length >> 3) + 1;
654 offset = strlen(buf);
656 snprintf(buf + offset, buflen - offset, ", Group %s",
657 bgp_vpn_ip_print(ndo, pptr, addr_length));
658 pptr += (addr_length >> 3);
662 return (total_length);
666 /* RDs and RTs share the same semantics
667 * we use bgp_vpn_rd_print for
668 * printing route targets inside a NLRI */
670 bgp_vpn_rd_print(netdissect_options *ndo,
673 /* allocate space for the largest possible string */
674 static char rd[sizeof("xxxxxxxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")];
677 /* ok lets load the RD format */
678 switch (EXTRACT_16BITS(pptr)) {
680 /* 2-byte-AS:number fmt*/
682 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u (= %u.%u.%u.%u)",
683 EXTRACT_16BITS(pptr+2),
684 EXTRACT_32BITS(pptr+4),
685 *(pptr+4), *(pptr+5), *(pptr+6), *(pptr+7));
687 /* IP-address:AS fmt*/
690 snprintf(pos, sizeof(rd) - (pos - rd), "%u.%u.%u.%u:%u",
691 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
694 /* 4-byte-AS:number fmt*/
696 snprintf(pos, sizeof(rd) - (pos - rd), "%s:%u (%u.%u.%u.%u:%u)",
697 as_printf(ndo, astostr, sizeof(astostr), EXTRACT_32BITS(pptr+2)),
698 EXTRACT_16BITS(pptr+6), *(pptr+2), *(pptr+3), *(pptr+4),
699 *(pptr+5), EXTRACT_16BITS(pptr+6));
702 snprintf(pos, sizeof(rd) - (pos - rd), "unknown RD format");
711 decode_rt_routing_info(netdissect_options *ndo,
712 const u_char *pptr, char *buf, u_int buflen)
714 uint8_t route_target[8];
718 plen = pptr[0]; /* get prefix length */
721 snprintf(buf, buflen, "default route target");
728 plen-=32; /* adjust prefix length */
733 memset(&route_target, 0, sizeof(route_target));
734 ND_TCHECK2(pptr[1], (plen + 7) / 8);
735 memcpy(&route_target, &pptr[1], (plen + 7) / 8);
737 ((u_char *)&route_target)[(plen + 7) / 8 - 1] &=
738 ((0xff00 >> (plen % 8)) & 0xff);
740 snprintf(buf, buflen, "origin AS: %s, route target %s",
741 as_printf(ndo, astostr, sizeof(astostr), EXTRACT_32BITS(pptr+1)),
742 bgp_vpn_rd_print(ndo, (u_char *)&route_target));
744 return 5 + (plen + 7) / 8;
751 decode_labeled_vpn_prefix4(netdissect_options *ndo,
752 const u_char *pptr, char *buf, u_int buflen)
758 plen = pptr[0]; /* get prefix length */
763 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
768 memset(&addr, 0, sizeof(addr));
769 ND_TCHECK2(pptr[12], (plen + 7) / 8);
770 memcpy(&addr, &pptr[12], (plen + 7) / 8);
772 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
773 ((0xff00 >> (plen % 8)) & 0xff);
775 /* the label may get offsetted by 4 bits so lets shift it right */
776 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
777 bgp_vpn_rd_print(ndo, pptr+4),
778 getname(ndo, (u_char *)&addr),
780 EXTRACT_24BITS(pptr+1)>>4,
781 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
783 return 12 + (plen + 7) / 8;
790 * +-------------------------------+
792 * | RD:IPv4-address (12 octets) |
794 * +-------------------------------+
795 * | MDT Group-address (4 octets) |
796 * +-------------------------------+
799 #define MDT_VPN_NLRI_LEN 16
802 decode_mdt_vpn_nlri(netdissect_options *ndo,
803 const u_char *pptr, char *buf, u_int buflen)
807 const u_char *vpn_ip;
811 /* if the NLRI is not predefined length, quit.*/
812 if (*pptr != MDT_VPN_NLRI_LEN * 8)
817 ND_TCHECK2(pptr[0], 8);
822 ND_TCHECK2(pptr[0], sizeof(struct in_addr));
824 pptr+=sizeof(struct in_addr);
826 /* MDT Group Address */
827 ND_TCHECK2(pptr[0], sizeof(struct in_addr));
829 snprintf(buf, buflen, "RD: %s, VPN IP Address: %s, MC Group Address: %s",
830 bgp_vpn_rd_print(ndo, rd), ipaddr_string(ndo, vpn_ip), ipaddr_string(ndo, pptr));
832 return MDT_VPN_NLRI_LEN + 1;
839 #define BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI 1
840 #define BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI 2
841 #define BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI 3
842 #define BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF 4
843 #define BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE 5
844 #define BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN 6
845 #define BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN 7
847 static const struct tok bgp_multicast_vpn_route_type_values[] = {
848 { BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI, "Intra-AS I-PMSI"},
849 { BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI, "Inter-AS I-PMSI"},
850 { BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI, "S-PMSI"},
851 { BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF, "Intra-AS Segment-Leaf"},
852 { BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE, "Source-Active"},
853 { BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN, "Shared Tree Join"},
854 { BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN, "Source Tree Join"},
858 decode_multicast_vpn(netdissect_options *ndo,
859 const u_char *pptr, char *buf, u_int buflen)
861 uint8_t route_type, route_length, addr_length, sg_length;
864 ND_TCHECK2(pptr[0], 2);
865 route_type = *pptr++;
866 route_length = *pptr++;
868 snprintf(buf, buflen, "Route-Type: %s (%u), length: %u",
869 tok2str(bgp_multicast_vpn_route_type_values,
870 "Unknown", route_type),
871 route_type, route_length);
874 case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI:
875 ND_TCHECK2(pptr[0], BGP_VPN_RD_LEN);
876 offset = strlen(buf);
877 snprintf(buf + offset, buflen - offset, ", RD: %s, Originator %s",
878 bgp_vpn_rd_print(ndo, pptr),
879 bgp_vpn_ip_print(ndo, pptr + BGP_VPN_RD_LEN,
880 (route_length - BGP_VPN_RD_LEN) << 3));
882 case BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI:
883 ND_TCHECK2(pptr[0], BGP_VPN_RD_LEN + 4);
884 offset = strlen(buf);
885 snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %s",
886 bgp_vpn_rd_print(ndo, pptr),
887 as_printf(ndo, astostr, sizeof(astostr),
888 EXTRACT_32BITS(pptr + BGP_VPN_RD_LEN)));
891 case BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI:
892 ND_TCHECK2(pptr[0], BGP_VPN_RD_LEN);
893 offset = strlen(buf);
894 snprintf(buf + offset, buflen - offset, ", RD: %s",
895 bgp_vpn_rd_print(ndo, pptr));
896 pptr += BGP_VPN_RD_LEN;
898 sg_length = bgp_vpn_sg_print(ndo, pptr, buf, buflen);
899 addr_length = route_length - sg_length;
901 ND_TCHECK2(pptr[0], addr_length);
902 offset = strlen(buf);
903 snprintf(buf + offset, buflen - offset, ", Originator %s",
904 bgp_vpn_ip_print(ndo, pptr, addr_length << 3));
907 case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE:
908 ND_TCHECK2(pptr[0], BGP_VPN_RD_LEN);
909 offset = strlen(buf);
910 snprintf(buf + offset, buflen - offset, ", RD: %s",
911 bgp_vpn_rd_print(ndo, pptr));
912 pptr += BGP_VPN_RD_LEN;
914 bgp_vpn_sg_print(ndo, pptr, buf, buflen);
917 case BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN: /* fall through */
918 case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN:
919 ND_TCHECK2(pptr[0], BGP_VPN_RD_LEN);
920 offset = strlen(buf);
921 snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %s",
922 bgp_vpn_rd_print(ndo, pptr),
923 as_printf(ndo, astostr, sizeof(astostr),
924 EXTRACT_32BITS(pptr + BGP_VPN_RD_LEN)));
925 pptr += BGP_VPN_RD_LEN;
927 bgp_vpn_sg_print(ndo, pptr, buf, buflen);
931 * no per route-type printing yet.
933 case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF:
938 return route_length + 2;
945 * As I remember, some versions of systems have an snprintf() that
946 * returns -1 if the buffer would have overflowed. If the return
947 * value is negative, set buflen to 0, to indicate that we've filled
950 * If the return value is greater than buflen, that means that
951 * the buffer would have overflowed; again, set buflen to 0 in
954 #define UPDATE_BUF_BUFLEN(buf, buflen, strlen) \
957 else if ((u_int)strlen>buflen) \
965 decode_labeled_vpn_l2(netdissect_options *ndo,
966 const u_char *pptr, char *buf, u_int buflen)
968 int plen,tlen,strlen,tlv_type,tlv_len,ttlv_len;
970 ND_TCHECK2(pptr[0], 2);
971 plen=EXTRACT_16BITS(pptr);
974 /* Old and new L2VPN NLRI share AFI/SAFI
975 * -> Assume a 12 Byte-length NLRI is auto-discovery-only
976 * and > 17 as old format. Complain for the middle case
979 /* assume AD-only with RD, BGPNH */
980 ND_TCHECK2(pptr[0],12);
982 strlen=snprintf(buf, buflen, "RD: %s, BGPNH: %s",
983 bgp_vpn_rd_print(ndo, pptr),
984 /* need something like getname(ndo, ) here */
987 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
991 } else if (plen>17) {
992 /* assume old format */
993 /* RD, ID, LBLKOFF, LBLBASE */
995 ND_TCHECK2(pptr[0],15);
997 strlen=snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u",
998 bgp_vpn_rd_print(ndo, pptr),
999 EXTRACT_16BITS(pptr+8),
1000 EXTRACT_16BITS(pptr+10),
1001 EXTRACT_24BITS(pptr+12)>>4); /* the label is offsetted by 4 bits so lets shift it right */
1002 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
1006 /* ok now the variable part - lets read out TLVs*/
1010 ND_TCHECK2(pptr[0], 3);
1012 tlv_len=EXTRACT_16BITS(pptr);
1019 strlen=snprintf(buf,buflen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
1022 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
1024 ttlv_len=ttlv_len/8+1; /* how many bytes do we need to read ? */
1025 while (ttlv_len>0) {
1028 strlen=snprintf(buf,buflen, "%02x",*pptr++);
1029 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
1036 strlen=snprintf(buf,buflen, "\n\t\tunknown TLV #%u, length: %u",
1039 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
1043 tlen-=(tlv_len<<3); /* the tlv-length is expressed in bits so lets shift it right */
1048 /* complain bitterly ? */
1059 decode_prefix6(netdissect_options *ndo,
1060 const u_char *pd, u_int itemlen, char *buf, u_int buflen)
1062 struct in6_addr addr;
1063 u_int plen, plenbytes;
1072 memset(&addr, 0, sizeof(addr));
1073 plenbytes = (plen + 7) / 8;
1074 ND_TCHECK2(pd[1], plenbytes);
1075 ITEMCHECK(plenbytes);
1076 memcpy(&addr, &pd[1], plenbytes);
1078 addr.s6_addr[plenbytes - 1] &=
1079 ((0xff00 >> (plen % 8)) & 0xff);
1081 snprintf(buf, buflen, "%s/%d", getname6(ndo, (u_char *)&addr), plen);
1082 return 1 + plenbytes;
1092 decode_labeled_prefix6(netdissect_options *ndo,
1093 const u_char *pptr, u_int itemlen, char *buf, u_int buflen)
1095 struct in6_addr addr;
1096 u_int plen, plenbytes;
1098 /* prefix length and label = 4 bytes */
1099 ND_TCHECK2(pptr[0], 4);
1101 plen = pptr[0]; /* get prefix length */
1106 plen-=24; /* adjust prefixlen - labellength */
1112 memset(&addr, 0, sizeof(addr));
1113 plenbytes = (plen + 7) / 8;
1114 ND_TCHECK2(pptr[4], plenbytes);
1115 memcpy(&addr, &pptr[4], plenbytes);
1117 addr.s6_addr[plenbytes - 1] &=
1118 ((0xff00 >> (plen % 8)) & 0xff);
1120 /* the label may get offsetted by 4 bits so lets shift it right */
1121 snprintf(buf, buflen, "%s/%d, label:%u %s",
1122 getname6(ndo, (u_char *)&addr),
1124 EXTRACT_24BITS(pptr+1)>>4,
1125 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
1127 return 4 + plenbytes;
1137 decode_labeled_vpn_prefix6(netdissect_options *ndo,
1138 const u_char *pptr, char *buf, u_int buflen)
1140 struct in6_addr addr;
1144 plen = pptr[0]; /* get prefix length */
1149 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
1154 memset(&addr, 0, sizeof(addr));
1155 ND_TCHECK2(pptr[12], (plen + 7) / 8);
1156 memcpy(&addr, &pptr[12], (plen + 7) / 8);
1158 addr.s6_addr[(plen + 7) / 8 - 1] &=
1159 ((0xff00 >> (plen % 8)) & 0xff);
1161 /* the label may get offsetted by 4 bits so lets shift it right */
1162 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
1163 bgp_vpn_rd_print(ndo, pptr+4),
1164 getname6(ndo, (u_char *)&addr),
1166 EXTRACT_24BITS(pptr+1)>>4,
1167 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
1169 return 12 + (plen + 7) / 8;
1177 decode_clnp_prefix(netdissect_options *ndo,
1178 const u_char *pptr, char *buf, u_int buflen)
1184 plen = pptr[0]; /* get prefix length */
1189 memset(&addr, 0, sizeof(addr));
1190 ND_TCHECK2(pptr[4], (plen + 7) / 8);
1191 memcpy(&addr, &pptr[4], (plen + 7) / 8);
1193 addr[(plen + 7) / 8 - 1] &=
1194 ((0xff00 >> (plen % 8)) & 0xff);
1196 snprintf(buf, buflen, "%s/%d",
1197 isonsap_string(addr,(plen + 7) / 8),
1200 return 1 + (plen + 7) / 8;
1207 decode_labeled_vpn_clnp_prefix(netdissect_options *ndo,
1208 const u_char *pptr, char *buf, u_int buflen)
1214 plen = pptr[0]; /* get prefix length */
1219 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
1224 memset(&addr, 0, sizeof(addr));
1225 ND_TCHECK2(pptr[12], (plen + 7) / 8);
1226 memcpy(&addr, &pptr[12], (plen + 7) / 8);
1228 addr[(plen + 7) / 8 - 1] &=
1229 ((0xff00 >> (plen % 8)) & 0xff);
1231 /* the label may get offsetted by 4 bits so lets shift it right */
1232 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
1233 bgp_vpn_rd_print(ndo, pptr+4),
1234 isonsap_string(addr,(plen + 7) / 8),
1236 EXTRACT_24BITS(pptr+1)>>4,
1237 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
1239 return 12 + (plen + 7) / 8;
1246 * bgp_attr_get_as_size
1248 * Try to find the size of the ASs encoded in an as-path. It is not obvious, as
1249 * both Old speakers that do not support 4 byte AS, and the new speakers that do
1250 * support, exchange AS-Path with the same path-attribute type value 0x02.
1253 bgp_attr_get_as_size(netdissect_options *ndo,
1254 uint8_t bgpa_type, const u_char *pptr, int len)
1256 const u_char *tptr = pptr;
1259 * If the path attribute is the optional AS4 path type, then we already
1260 * know, that ASs must be encoded in 4 byte format.
1262 if (bgpa_type == BGPTYPE_AS4_PATH) {
1267 * Let us assume that ASs are of 2 bytes in size, and check if the AS-Path
1268 * TLV is good. If not, ask the caller to try with AS encoded as 4 bytes
1271 while (tptr < pptr + len) {
1275 * If we do not find a valid segment type, our guess might be wrong.
1277 if (tptr[0] < BGP_AS_SEG_TYPE_MIN || tptr[0] > BGP_AS_SEG_TYPE_MAX) {
1281 tptr += 2 + tptr[1] * 2;
1285 * If we correctly reached end of the AS path attribute data content,
1286 * then most likely ASs were indeed encoded as 2 bytes.
1288 if (tptr == pptr + len) {
1295 * We can come here, either we did not have enough data, or if we
1296 * try to decode 4 byte ASs in 2 byte format. Either way, return 4,
1297 * so that calller can try to decode each AS as of 4 bytes. If indeed
1298 * there was not enough data, it will crib and end the parse anyways.
1304 bgp_attr_print(netdissect_options *ndo,
1305 u_int atype, const u_char *pptr, u_int len)
1309 uint8_t safi, snpa, nhlen;
1310 union { /* copy buffer for bandwidth values */
1317 char buf[MAXHOSTNAMELEN + 100];
1318 char tokbuf[TOKBUFSIZE];
1325 case BGPTYPE_ORIGIN:
1327 ND_PRINT((ndo, "invalid len"));
1330 ND_PRINT((ndo, "%s", tok2strbuf(bgp_origin_values,
1331 "Unknown Origin Typecode",
1333 tokbuf, sizeof(tokbuf))));
1339 * Process AS4 byte path and AS2 byte path attributes here.
1341 case BGPTYPE_AS4_PATH:
1342 case BGPTYPE_AS_PATH:
1344 ND_PRINT((ndo, "invalid len"));
1348 ND_PRINT((ndo, "empty"));
1353 * BGP updates exchanged between New speakers that support 4
1354 * byte AS, ASs are always encoded in 4 bytes. There is no
1355 * definitive way to find this, just by the packet's
1356 * contents. So, check for packet's TLV's sanity assuming
1357 * 2 bytes first, and it does not pass, assume that ASs are
1358 * encoded in 4 bytes format and move on.
1360 as_size = bgp_attr_get_as_size(ndo, atype, pptr, len);
1362 while (tptr < pptr + len) {
1364 ND_PRINT((ndo, "%s", tok2strbuf(bgp_as_path_segment_open_values,
1366 tokbuf, sizeof(tokbuf))));
1367 for (i = 0; i < tptr[1] * as_size; i += as_size) {
1368 ND_TCHECK2(tptr[2 + i], as_size);
1369 ND_PRINT((ndo, "%s ",
1370 as_printf(ndo, astostr, sizeof(astostr),
1372 EXTRACT_16BITS(&tptr[2 + i]) :
1373 EXTRACT_32BITS(&tptr[2 + i]))));
1376 ND_PRINT((ndo, "%s", tok2strbuf(bgp_as_path_segment_close_values,
1378 tokbuf, sizeof(tokbuf))));
1380 tptr += 2 + tptr[1] * as_size;
1383 case BGPTYPE_NEXT_HOP:
1385 ND_PRINT((ndo, "invalid len"));
1387 ND_TCHECK2(tptr[0], 4);
1388 ND_PRINT((ndo, "%s", getname(ndo, tptr)));
1391 case BGPTYPE_MULTI_EXIT_DISC:
1392 case BGPTYPE_LOCAL_PREF:
1394 ND_PRINT((ndo, "invalid len"));
1396 ND_TCHECK2(tptr[0], 4);
1397 ND_PRINT((ndo, "%u", EXTRACT_32BITS(tptr)));
1400 case BGPTYPE_ATOMIC_AGGREGATE:
1402 ND_PRINT((ndo, "invalid len"));
1404 case BGPTYPE_AGGREGATOR:
1407 * Depending on the AS encoded is of 2 bytes or of 4 bytes,
1408 * the length of this PA can be either 6 bytes or 8 bytes.
1410 if (len != 6 && len != 8) {
1411 ND_PRINT((ndo, "invalid len"));
1414 ND_TCHECK2(tptr[0], len);
1416 ND_PRINT((ndo, " AS #%s, origin %s",
1417 as_printf(ndo, astostr, sizeof(astostr), EXTRACT_16BITS(tptr)),
1418 getname(ndo, tptr + 2)));
1420 ND_PRINT((ndo, " AS #%s, origin %s",
1421 as_printf(ndo, astostr, sizeof(astostr),
1422 EXTRACT_32BITS(tptr)), getname(ndo, tptr + 4)));
1425 case BGPTYPE_AGGREGATOR4:
1427 ND_PRINT((ndo, "invalid len"));
1430 ND_TCHECK2(tptr[0], 8);
1431 ND_PRINT((ndo, " AS #%s, origin %s",
1432 as_printf(ndo, astostr, sizeof(astostr), EXTRACT_32BITS(tptr)),
1433 getname(ndo, tptr + 4)));
1435 case BGPTYPE_COMMUNITIES:
1437 ND_PRINT((ndo, "invalid len"));
1442 ND_TCHECK2(tptr[0], 4);
1443 comm = EXTRACT_32BITS(tptr);
1445 case BGP_COMMUNITY_NO_EXPORT:
1446 ND_PRINT((ndo, " NO_EXPORT"));
1448 case BGP_COMMUNITY_NO_ADVERT:
1449 ND_PRINT((ndo, " NO_ADVERTISE"));
1451 case BGP_COMMUNITY_NO_EXPORT_SUBCONFED:
1452 ND_PRINT((ndo, " NO_EXPORT_SUBCONFED"));
1455 ND_PRINT((ndo, "%u:%u%s",
1456 (comm >> 16) & 0xffff,
1458 (tlen>4) ? ", " : ""));
1465 case BGPTYPE_ORIGINATOR_ID:
1467 ND_PRINT((ndo, "invalid len"));
1470 ND_TCHECK2(tptr[0], 4);
1471 ND_PRINT((ndo, "%s",getname(ndo, tptr)));
1473 case BGPTYPE_CLUSTER_LIST:
1475 ND_PRINT((ndo, "invalid len"));
1479 ND_TCHECK2(tptr[0], 4);
1480 ND_PRINT((ndo, "%s%s",
1482 (tlen>4) ? ", " : ""));
1487 case BGPTYPE_MP_REACH_NLRI:
1488 ND_TCHECK2(tptr[0], 3);
1489 af = EXTRACT_16BITS(tptr);
1492 ND_PRINT((ndo, "\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1493 tok2strbuf(af_values, "Unknown AFI", af,
1494 tokbuf, sizeof(tokbuf)),
1496 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1497 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1498 tokbuf, sizeof(tokbuf)),
1501 switch(af<<8 | safi) {
1502 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1503 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1504 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1505 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1506 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1507 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1508 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1509 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1510 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN):
1511 case (AFNUM_INET<<8 | SAFNUM_MDT):
1513 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1514 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1515 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1516 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1517 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1518 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1519 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1521 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1522 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1523 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1524 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1525 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1526 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1527 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1528 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1529 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1530 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1533 ND_TCHECK2(tptr[0], tlen);
1534 ND_PRINT((ndo, "\n\t no AFI %u / SAFI %u decoder", af, safi));
1535 if (ndo->ndo_vflag <= 1)
1536 print_unknown_data(ndo, tptr, "\n\t ", tlen);
1550 ND_PRINT((ndo, "\n\t nexthop: "));
1553 ND_PRINT((ndo, ", " ));
1555 switch(af<<8 | safi) {
1556 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1557 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1558 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1559 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1560 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1561 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN):
1562 case (AFNUM_INET<<8 | SAFNUM_MDT):
1563 if (tlen < (int)sizeof(struct in_addr)) {
1564 ND_PRINT((ndo, "invalid len"));
1567 ND_TCHECK2(tptr[0], sizeof(struct in_addr));
1568 ND_PRINT((ndo, "%s",getname(ndo, tptr)));
1569 tlen -= sizeof(struct in_addr);
1570 tptr += sizeof(struct in_addr);
1573 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1574 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1575 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1576 if (tlen < (int)(sizeof(struct in_addr)+BGP_VPN_RD_LEN)) {
1577 ND_PRINT((ndo, "invalid len"));
1580 ND_TCHECK2(tptr[0], sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1581 ND_PRINT((ndo, "RD: %s, %s",
1582 bgp_vpn_rd_print(ndo, tptr),
1583 getname(ndo, tptr+BGP_VPN_RD_LEN)));
1584 tlen -= (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1585 tptr += (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1589 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1590 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1591 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1592 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1593 if (tlen < (int)sizeof(struct in6_addr)) {
1594 ND_PRINT((ndo, "invalid len"));
1597 ND_TCHECK2(tptr[0], sizeof(struct in6_addr));
1598 ND_PRINT((ndo, "%s", getname6(ndo, tptr)));
1599 tlen -= sizeof(struct in6_addr);
1600 tptr += sizeof(struct in6_addr);
1603 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1604 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1605 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1606 if (tlen < (int)(sizeof(struct in6_addr)+BGP_VPN_RD_LEN)) {
1607 ND_PRINT((ndo, "invalid len"));
1610 ND_TCHECK2(tptr[0], sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1611 ND_PRINT((ndo, "RD: %s, %s",
1612 bgp_vpn_rd_print(ndo, tptr),
1613 getname6(ndo, tptr+BGP_VPN_RD_LEN)));
1614 tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1615 tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1619 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1620 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1621 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1622 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1623 if (tlen < (int)sizeof(struct in_addr)) {
1624 ND_PRINT((ndo, "invalid len"));
1627 ND_TCHECK2(tptr[0], sizeof(struct in_addr));
1628 ND_PRINT((ndo, "%s", getname(ndo, tptr)));
1629 tlen -= (sizeof(struct in_addr));
1630 tptr += (sizeof(struct in_addr));
1633 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1634 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1635 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1636 ND_TCHECK2(tptr[0], tlen);
1637 ND_PRINT((ndo, "%s", isonsap_string(tptr, tlen)));
1642 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1643 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1644 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1645 if (tlen < BGP_VPN_RD_LEN+1) {
1646 ND_PRINT((ndo, "invalid len"));
1649 ND_TCHECK2(tptr[0], tlen);
1650 ND_PRINT((ndo, "RD: %s, %s",
1651 bgp_vpn_rd_print(ndo, tptr),
1652 isonsap_string(tptr+BGP_VPN_RD_LEN,tlen-BGP_VPN_RD_LEN)));
1653 /* rfc986 mapped IPv4 address ? */
1654 if (EXTRACT_32BITS(tptr+BGP_VPN_RD_LEN) == 0x47000601)
1655 ND_PRINT((ndo, " = %s", getname(ndo, tptr+BGP_VPN_RD_LEN+4)));
1657 /* rfc1888 mapped IPv6 address ? */
1658 else if (EXTRACT_24BITS(tptr+BGP_VPN_RD_LEN) == 0x350000)
1659 ND_PRINT((ndo, " = %s", getname6(ndo, tptr+BGP_VPN_RD_LEN+3)));
1666 ND_TCHECK2(tptr[0], tlen);
1667 ND_PRINT((ndo, "no AFI %u/SAFI %u decoder", af, safi));
1668 if (ndo->ndo_vflag <= 1)
1669 print_unknown_data(ndo, tptr, "\n\t ", tlen);
1677 ND_PRINT((ndo, ", nh-length: %u", nhlen));
1685 ND_PRINT((ndo, "\n\t %u SNPA", snpa));
1686 for (/*nothing*/; snpa > 0; snpa--) {
1688 ND_PRINT((ndo, "\n\t %d bytes", tptr[0]));
1689 tptr += tptr[0] + 1;
1692 ND_PRINT((ndo, ", no SNPA"));
1695 while (len - (tptr - pptr) > 0) {
1696 switch (af<<8 | safi) {
1697 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1698 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1699 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1700 advance = decode_prefix4(ndo, tptr, len, buf, sizeof(buf));
1702 ND_PRINT((ndo, "\n\t (illegal prefix length)"));
1703 else if (advance == -2)
1705 else if (advance == -3)
1706 break; /* bytes left, but not enough */
1708 ND_PRINT((ndo, "\n\t %s", buf));
1710 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1711 advance = decode_labeled_prefix4(ndo, tptr, len, buf, sizeof(buf));
1713 ND_PRINT((ndo, "\n\t (illegal prefix length)"));
1714 else if (advance == -2)
1716 else if (advance == -3)
1717 break; /* bytes left, but not enough */
1719 ND_PRINT((ndo, "\n\t %s", buf));
1721 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1722 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1723 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1724 advance = decode_labeled_vpn_prefix4(ndo, tptr, buf, sizeof(buf));
1726 ND_PRINT((ndo, "\n\t (illegal prefix length)"));
1727 else if (advance == -2)
1730 ND_PRINT((ndo, "\n\t %s", buf));
1732 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1733 advance = decode_rt_routing_info(ndo, tptr, buf, sizeof(buf));
1735 ND_PRINT((ndo, "\n\t (illegal prefix length)"));
1736 else if (advance == -2)
1739 ND_PRINT((ndo, "\n\t %s", buf));
1741 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */
1742 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN):
1743 advance = decode_multicast_vpn(ndo, tptr, buf, sizeof(buf));
1745 ND_PRINT((ndo, "\n\t (illegal prefix length)"));
1746 else if (advance == -2)
1749 ND_PRINT((ndo, "\n\t %s", buf));
1752 case (AFNUM_INET<<8 | SAFNUM_MDT):
1753 advance = decode_mdt_vpn_nlri(ndo, tptr, buf, sizeof(buf));
1755 ND_PRINT((ndo, "\n\t (illegal prefix length)"));
1756 else if (advance == -2)
1759 ND_PRINT((ndo, "\n\t %s", buf));
1762 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1763 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1764 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1765 advance = decode_prefix6(ndo, tptr, len, buf, sizeof(buf));
1767 ND_PRINT((ndo, "\n\t (illegal prefix length)"));
1768 else if (advance == -2)
1770 else if (advance == -3)
1771 break; /* bytes left, but not enough */
1773 ND_PRINT((ndo, "\n\t %s", buf));
1775 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1776 advance = decode_labeled_prefix6(ndo, tptr, len, buf, sizeof(buf));
1778 ND_PRINT((ndo, "\n\t (illegal prefix length)"));
1779 else if (advance == -2)
1781 else if (advance == -3)
1782 break; /* bytes left, but not enough */
1784 ND_PRINT((ndo, "\n\t %s", buf));
1786 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1787 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1788 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1789 advance = decode_labeled_vpn_prefix6(ndo, tptr, buf, sizeof(buf));
1791 ND_PRINT((ndo, "\n\t (illegal prefix length)"));
1792 else if (advance == -2)
1795 ND_PRINT((ndo, "\n\t %s", buf));
1798 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1799 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1800 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1801 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1802 advance = decode_labeled_vpn_l2(ndo, tptr, buf, sizeof(buf));
1804 ND_PRINT((ndo, "\n\t (illegal length)"));
1805 else if (advance == -2)
1808 ND_PRINT((ndo, "\n\t %s", buf));
1810 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1811 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1812 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1813 advance = decode_clnp_prefix(ndo, tptr, buf, sizeof(buf));
1815 ND_PRINT((ndo, "\n\t (illegal prefix length)"));
1816 else if (advance == -2)
1819 ND_PRINT((ndo, "\n\t %s", buf));
1821 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1822 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1823 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1824 advance = decode_labeled_vpn_clnp_prefix(ndo, tptr, buf, sizeof(buf));
1826 ND_PRINT((ndo, "\n\t (illegal prefix length)"));
1827 else if (advance == -2)
1830 ND_PRINT((ndo, "\n\t %s", buf));
1833 ND_TCHECK2(*tptr,tlen);
1834 ND_PRINT((ndo, "\n\t no AFI %u / SAFI %u decoder", af, safi));
1835 if (ndo->ndo_vflag <= 1)
1836 print_unknown_data(ndo, tptr, "\n\t ", tlen);
1848 case BGPTYPE_MP_UNREACH_NLRI:
1849 ND_TCHECK2(tptr[0], BGP_MP_NLRI_MINSIZE);
1850 af = EXTRACT_16BITS(tptr);
1853 ND_PRINT((ndo, "\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1854 tok2strbuf(af_values, "Unknown AFI", af,
1855 tokbuf, sizeof(tokbuf)),
1857 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1858 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1859 tokbuf, sizeof(tokbuf)),
1862 if (len == BGP_MP_NLRI_MINSIZE)
1863 ND_PRINT((ndo, "\n\t End-of-Rib Marker (empty NLRI)"));
1867 while (len - (tptr - pptr) > 0) {
1868 switch (af<<8 | safi) {
1869 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1870 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1871 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1872 advance = decode_prefix4(ndo, tptr, len, buf, sizeof(buf));
1874 ND_PRINT((ndo, "\n\t (illegal prefix length)"));
1875 else if (advance == -2)
1877 else if (advance == -3)
1878 break; /* bytes left, but not enough */
1880 ND_PRINT((ndo, "\n\t %s", buf));
1882 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1883 advance = decode_labeled_prefix4(ndo, tptr, len, buf, sizeof(buf));
1885 ND_PRINT((ndo, "\n\t (illegal prefix length)"));
1886 else if (advance == -2)
1888 else if (advance == -3)
1889 break; /* bytes left, but not enough */
1891 ND_PRINT((ndo, "\n\t %s", buf));
1893 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1894 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1895 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1896 advance = decode_labeled_vpn_prefix4(ndo, tptr, buf, sizeof(buf));
1898 ND_PRINT((ndo, "\n\t (illegal prefix length)"));
1899 else if (advance == -2)
1902 ND_PRINT((ndo, "\n\t %s", buf));
1905 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1906 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1907 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1908 advance = decode_prefix6(ndo, tptr, len, buf, sizeof(buf));
1910 ND_PRINT((ndo, "\n\t (illegal prefix length)"));
1911 else if (advance == -2)
1913 else if (advance == -3)
1914 break; /* bytes left, but not enough */
1916 ND_PRINT((ndo, "\n\t %s", buf));
1918 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1919 advance = decode_labeled_prefix6(ndo, tptr, len, buf, sizeof(buf));
1921 ND_PRINT((ndo, "\n\t (illegal prefix length)"));
1922 else if (advance == -2)
1924 else if (advance == -3)
1925 break; /* bytes left, but not enough */
1927 ND_PRINT((ndo, "\n\t %s", buf));
1929 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1930 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1931 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1932 advance = decode_labeled_vpn_prefix6(ndo, tptr, buf, sizeof(buf));
1934 ND_PRINT((ndo, "\n\t (illegal prefix length)"));
1935 else if (advance == -2)
1938 ND_PRINT((ndo, "\n\t %s", buf));
1941 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1942 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1943 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1944 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1945 advance = decode_labeled_vpn_l2(ndo, tptr, buf, sizeof(buf));
1947 ND_PRINT((ndo, "\n\t (illegal length)"));
1948 else if (advance == -2)
1951 ND_PRINT((ndo, "\n\t %s", buf));
1953 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1954 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1955 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1956 advance = decode_clnp_prefix(ndo, tptr, buf, sizeof(buf));
1958 ND_PRINT((ndo, "\n\t (illegal prefix length)"));
1959 else if (advance == -2)
1962 ND_PRINT((ndo, "\n\t %s", buf));
1964 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1965 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1966 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1967 advance = decode_labeled_vpn_clnp_prefix(ndo, tptr, buf, sizeof(buf));
1969 ND_PRINT((ndo, "\n\t (illegal prefix length)"));
1970 else if (advance == -2)
1973 ND_PRINT((ndo, "\n\t %s", buf));
1975 case (AFNUM_INET<<8 | SAFNUM_MDT):
1976 advance = decode_mdt_vpn_nlri(ndo, tptr, buf, sizeof(buf));
1978 ND_PRINT((ndo, "\n\t (illegal prefix length)"));
1979 else if (advance == -2)
1982 ND_PRINT((ndo, "\n\t %s", buf));
1984 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */
1985 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN):
1986 advance = decode_multicast_vpn(ndo, tptr, buf, sizeof(buf));
1988 ND_PRINT((ndo, "\n\t (illegal prefix length)"));
1989 else if (advance == -2)
1992 ND_PRINT((ndo, "\n\t %s", buf));
1995 ND_TCHECK2(*(tptr-3),tlen);
1996 ND_PRINT((ndo, "no AFI %u / SAFI %u decoder", af, safi));
1997 if (ndo->ndo_vflag <= 1)
1998 print_unknown_data(ndo, tptr-3, "\n\t ", tlen);
2008 case BGPTYPE_EXTD_COMMUNITIES:
2010 ND_PRINT((ndo, "invalid len"));
2016 ND_TCHECK2(tptr[0], 2);
2017 extd_comm=EXTRACT_16BITS(tptr);
2019 ND_PRINT((ndo, "\n\t %s (0x%04x), Flags [%s]",
2020 tok2strbuf(bgp_extd_comm_subtype_values,
2021 "unknown extd community typecode",
2022 extd_comm, tokbuf, sizeof(tokbuf)),
2024 bittok2str(bgp_extd_comm_flag_values, "none", extd_comm)));
2026 ND_TCHECK2(*(tptr+2), 6);
2028 case BGP_EXT_COM_RT_0:
2029 case BGP_EXT_COM_RO_0:
2030 case BGP_EXT_COM_L2VPN_RT_0:
2031 ND_PRINT((ndo, ": %u:%u (= %s)",
2032 EXTRACT_16BITS(tptr+2),
2033 EXTRACT_32BITS(tptr+4),
2034 getname(ndo, tptr+4)));
2036 case BGP_EXT_COM_RT_1:
2037 case BGP_EXT_COM_RO_1:
2038 case BGP_EXT_COM_L2VPN_RT_1:
2039 case BGP_EXT_COM_VRF_RT_IMP:
2040 ND_PRINT((ndo, ": %s:%u",
2041 getname(ndo, tptr+2),
2042 EXTRACT_16BITS(tptr+6)));
2044 case BGP_EXT_COM_RT_2:
2045 case BGP_EXT_COM_RO_2:
2046 ND_PRINT((ndo, ": %s:%u",
2047 as_printf(ndo, astostr, sizeof(astostr),
2048 EXTRACT_32BITS(tptr+2)), EXTRACT_16BITS(tptr+6)));
2050 case BGP_EXT_COM_LINKBAND:
2051 bw.i = EXTRACT_32BITS(tptr+2);
2052 ND_PRINT((ndo, ": bandwidth: %.3f Mbps",
2055 case BGP_EXT_COM_VPN_ORIGIN:
2056 case BGP_EXT_COM_VPN_ORIGIN2:
2057 case BGP_EXT_COM_VPN_ORIGIN3:
2058 case BGP_EXT_COM_VPN_ORIGIN4:
2059 case BGP_EXT_COM_OSPF_RID:
2060 case BGP_EXT_COM_OSPF_RID2:
2061 ND_PRINT((ndo, "%s", getname(ndo, tptr+2)));
2063 case BGP_EXT_COM_OSPF_RTYPE:
2064 case BGP_EXT_COM_OSPF_RTYPE2:
2065 ND_PRINT((ndo, ": area:%s, router-type:%s, metric-type:%s%s",
2066 getname(ndo, tptr+2),
2067 tok2strbuf(bgp_extd_comm_ospf_rtype_values,
2070 tokbuf, sizeof(tokbuf)),
2071 (*(tptr+7) & BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "",
2072 ((*(tptr+6) == BGP_OSPF_RTYPE_EXT) || (*(tptr+6) == BGP_OSPF_RTYPE_NSSA)) ? "E1" : ""));
2074 case BGP_EXT_COM_L2INFO:
2075 ND_PRINT((ndo, ": %s Control Flags [0x%02x]:MTU %u",
2076 tok2strbuf(l2vpn_encaps_values,
2079 tokbuf, sizeof(tokbuf)),
2081 EXTRACT_16BITS(tptr+4)));
2083 case BGP_EXT_COM_SOURCE_AS:
2084 ND_PRINT((ndo, ": AS %u", EXTRACT_16BITS(tptr+2)));
2087 ND_TCHECK2(*tptr,8);
2088 print_unknown_data(ndo, tptr, "\n\t ", 8);
2096 case BGPTYPE_PMSI_TUNNEL:
2098 uint8_t tunnel_type, flags;
2100 tunnel_type = *(tptr+1);
2104 ND_TCHECK2(tptr[0], 5);
2105 ND_PRINT((ndo, "\n\t Tunnel-type %s (%u), Flags [%s], MPLS Label %u",
2106 tok2str(bgp_pmsi_tunnel_values, "Unknown", tunnel_type),
2108 bittok2str(bgp_pmsi_flag_values, "none", flags),
2109 EXTRACT_24BITS(tptr+2)>>4));
2114 switch (tunnel_type) {
2115 case BGP_PMSI_TUNNEL_PIM_SM: /* fall through */
2116 case BGP_PMSI_TUNNEL_PIM_BIDIR:
2117 ND_TCHECK2(tptr[0], 8);
2118 ND_PRINT((ndo, "\n\t Sender %s, P-Group %s",
2119 ipaddr_string(ndo, tptr),
2120 ipaddr_string(ndo, tptr+4)));
2123 case BGP_PMSI_TUNNEL_PIM_SSM:
2124 ND_TCHECK2(tptr[0], 8);
2125 ND_PRINT((ndo, "\n\t Root-Node %s, P-Group %s",
2126 ipaddr_string(ndo, tptr),
2127 ipaddr_string(ndo, tptr+4)));
2129 case BGP_PMSI_TUNNEL_INGRESS:
2130 ND_TCHECK2(tptr[0], 4);
2131 ND_PRINT((ndo, "\n\t Tunnel-Endpoint %s",
2132 ipaddr_string(ndo, tptr)));
2134 case BGP_PMSI_TUNNEL_LDP_P2MP: /* fall through */
2135 case BGP_PMSI_TUNNEL_LDP_MP2MP:
2136 ND_TCHECK2(tptr[0], 8);
2137 ND_PRINT((ndo, "\n\t Root-Node %s, LSP-ID 0x%08x",
2138 ipaddr_string(ndo, tptr),
2139 EXTRACT_32BITS(tptr+4)));
2141 case BGP_PMSI_TUNNEL_RSVP_P2MP:
2142 ND_TCHECK2(tptr[0], 8);
2143 ND_PRINT((ndo, "\n\t Extended-Tunnel-ID %s, P2MP-ID 0x%08x",
2144 ipaddr_string(ndo, tptr),
2145 EXTRACT_32BITS(tptr+4)));
2148 if (ndo->ndo_vflag <= 1) {
2149 print_unknown_data(ndo, tptr, "\n\t ", tlen);
2154 case BGPTYPE_ATTR_SET:
2155 ND_TCHECK2(tptr[0], 4);
2158 ND_PRINT((ndo, "\n\t Origin AS: %s",
2159 as_printf(ndo, astostr, sizeof(astostr), EXTRACT_32BITS(tptr))));
2164 u_int aflags, atype, alenlen, alen;
2166 ND_TCHECK2(tptr[0], 2);
2170 atype = *(tptr + 1);
2173 alenlen = bgp_attr_lenlen(aflags, tptr);
2174 ND_TCHECK2(tptr[0], alenlen);
2177 alen = bgp_attr_len(aflags, tptr);
2181 ND_PRINT((ndo, "\n\t %s (%u), length: %u",
2182 tok2strbuf(bgp_attr_values,
2183 "Unknown Attribute", atype,
2184 tokbuf, sizeof(tokbuf)),
2189 ND_PRINT((ndo, ", Flags [%s%s%s%s",
2190 aflags & 0x80 ? "O" : "",
2191 aflags & 0x40 ? "T" : "",
2192 aflags & 0x20 ? "P" : "",
2193 aflags & 0x10 ? "E" : ""));
2195 ND_PRINT((ndo, "+%x", aflags & 0xf));
2196 ND_PRINT((ndo, "]: "));
2198 /* FIXME check for recursion */
2199 if (!bgp_attr_print(ndo, atype, tptr, alen))
2208 ND_TCHECK2(*pptr,len);
2209 ND_PRINT((ndo, "\n\t no Attribute %u decoder", atype)); /* we have no decoder for the attribute */
2210 if (ndo->ndo_vflag <= 1)
2211 print_unknown_data(ndo, pptr, "\n\t ", len);
2214 if (ndo->ndo_vflag > 1 && len) { /* omit zero length attributes*/
2215 ND_TCHECK2(*pptr,len);
2216 print_unknown_data(ndo, pptr, "\n\t ", len);
2225 bgp_capabilities_print(netdissect_options *ndo,
2226 const u_char *opt, int caps_len)
2228 char tokbuf[TOKBUFSIZE];
2229 char tokbuf2[TOKBUFSIZE];
2230 int cap_type, cap_len, tcap_len, cap_offset;
2233 while (i < caps_len) {
2234 ND_TCHECK2(opt[i], BGP_CAP_HEADER_SIZE);
2238 ND_PRINT((ndo, "\n\t %s (%u), length: %u",
2239 tok2strbuf(bgp_capcode_values, "Unknown",
2240 cap_type, tokbuf, sizeof(tokbuf)),
2243 ND_TCHECK2(opt[i+2], cap_len);
2245 case BGP_CAPCODE_MP:
2246 ND_PRINT((ndo, "\n\t\tAFI %s (%u), SAFI %s (%u)",
2247 tok2strbuf(af_values, "Unknown",
2248 EXTRACT_16BITS(opt+i+2),
2249 tokbuf, sizeof(tokbuf)),
2250 EXTRACT_16BITS(opt+i+2),
2251 tok2strbuf(bgp_safi_values, "Unknown",
2253 tokbuf, sizeof(tokbuf)),
2256 case BGP_CAPCODE_RESTART:
2257 ND_PRINT((ndo, "\n\t\tRestart Flags: [%s], Restart Time %us",
2258 ((opt[i+2])&0x80) ? "R" : "none",
2259 EXTRACT_16BITS(opt+i+2)&0xfff));
2262 while(tcap_len>=4) {
2263 ND_PRINT((ndo, "\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s",
2264 tok2strbuf(af_values,"Unknown",
2265 EXTRACT_16BITS(opt+i+cap_offset),
2266 tokbuf, sizeof(tokbuf)),
2267 EXTRACT_16BITS(opt+i+cap_offset),
2268 tok2strbuf(bgp_safi_values,"Unknown",
2269 opt[i+cap_offset+2],
2270 tokbuf2, sizeof(tokbuf2)),
2271 opt[i+cap_offset+2],
2272 ((opt[i+cap_offset+3])&0x80) ? "yes" : "no" ));
2277 case BGP_CAPCODE_RR:
2278 case BGP_CAPCODE_RR_CISCO:
2280 case BGP_CAPCODE_AS_NEW:
2283 * Extract the 4 byte AS number encoded.
2286 ND_PRINT((ndo, "\n\t\t 4 Byte AS %s",
2287 as_printf(ndo, astostr, sizeof(astostr),
2288 EXTRACT_32BITS(opt + i + 2))));
2292 ND_PRINT((ndo, "\n\t\tno decoder for Capability %u",
2294 if (ndo->ndo_vflag <= 1)
2295 print_unknown_data(ndo, &opt[i+2], "\n\t\t", cap_len);
2298 if (ndo->ndo_vflag > 1 && cap_len > 0) {
2299 print_unknown_data(ndo, &opt[i+2], "\n\t\t", cap_len);
2301 i += BGP_CAP_HEADER_SIZE + cap_len;
2306 ND_PRINT((ndo, "[|BGP]"));
2310 bgp_open_print(netdissect_options *ndo,
2311 const u_char *dat, int length)
2313 struct bgp_open bgpo;
2314 struct bgp_opt bgpopt;
2317 char tokbuf[TOKBUFSIZE];
2319 ND_TCHECK2(dat[0], BGP_OPEN_SIZE);
2320 memcpy(&bgpo, dat, BGP_OPEN_SIZE);
2322 ND_PRINT((ndo, "\n\t Version %d, ", bgpo.bgpo_version));
2323 ND_PRINT((ndo, "my AS %s, ",
2324 as_printf(ndo, astostr, sizeof(astostr), ntohs(bgpo.bgpo_myas))));
2325 ND_PRINT((ndo, "Holdtime %us, ", ntohs(bgpo.bgpo_holdtime)));
2326 ND_PRINT((ndo, "ID %s", getname(ndo, (u_char *)&bgpo.bgpo_id)));
2327 ND_PRINT((ndo, "\n\t Optional parameters, length: %u", bgpo.bgpo_optlen));
2329 /* some little sanity checking */
2330 if (length < bgpo.bgpo_optlen+BGP_OPEN_SIZE)
2334 opt = &((const struct bgp_open *)dat)->bgpo_optlen;
2338 while (i < bgpo.bgpo_optlen) {
2339 ND_TCHECK2(opt[i], BGP_OPT_SIZE);
2340 memcpy(&bgpopt, &opt[i], BGP_OPT_SIZE);
2341 if (i + 2 + bgpopt.bgpopt_len > bgpo.bgpo_optlen) {
2342 ND_PRINT((ndo, "\n\t Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len));
2346 ND_PRINT((ndo, "\n\t Option %s (%u), length: %u",
2347 tok2strbuf(bgp_opt_values,"Unknown",
2349 tokbuf, sizeof(tokbuf)),
2351 bgpopt.bgpopt_len));
2353 /* now let's decode the options we know*/
2354 switch(bgpopt.bgpopt_type) {
2357 bgp_capabilities_print(ndo, &opt[i+BGP_OPT_SIZE],
2363 ND_PRINT((ndo, "\n\t no decoder for option %u",
2364 bgpopt.bgpopt_type));
2367 i += BGP_OPT_SIZE + bgpopt.bgpopt_len;
2371 ND_PRINT((ndo, "[|BGP]"));
2375 bgp_update_print(netdissect_options *ndo,
2376 const u_char *dat, int length)
2380 int withdrawn_routes_len;
2383 char tokbuf[TOKBUFSIZE];
2385 char buf[MAXHOSTNAMELEN + 100];
2389 ND_TCHECK2(dat[0], BGP_SIZE);
2390 if (length < BGP_SIZE)
2392 memcpy(&bgp, dat, BGP_SIZE);
2393 p = dat + BGP_SIZE; /*XXX*/
2396 /* Unfeasible routes */
2397 ND_TCHECK2(p[0], 2);
2400 withdrawn_routes_len = EXTRACT_16BITS(p);
2403 if (withdrawn_routes_len) {
2405 * Without keeping state from the original NLRI message,
2406 * it's not possible to tell if this a v4 or v6 route,
2407 * so only try to decode it if we're not v6 enabled.
2409 ND_TCHECK2(p[0], withdrawn_routes_len);
2410 if (length < withdrawn_routes_len)
2413 ND_PRINT((ndo, "\n\t Withdrawn routes: %d bytes", withdrawn_routes_len));
2414 p += withdrawn_routes_len;
2415 length -= withdrawn_routes_len;
2417 if (withdrawn_routes_len < 2)
2420 withdrawn_routes_len -= 2;
2423 ND_PRINT((ndo, "\n\t Withdrawn routes:"));
2425 while(withdrawn_routes_len > 0) {
2426 wpfx = decode_prefix4(ndo, p, withdrawn_routes_len, buf, sizeof(buf));
2428 ND_PRINT((ndo, "\n\t (illegal prefix length)"));
2430 } else if (wpfx == -2)
2432 else if (wpfx == -3)
2433 goto trunc; /* bytes left, but not enough */
2435 ND_PRINT((ndo, "\n\t %s", buf));
2438 withdrawn_routes_len -= wpfx;
2444 ND_TCHECK2(p[0], 2);
2447 len = EXTRACT_16BITS(p);
2451 if (withdrawn_routes_len == 0 && len == 0 && length == 0) {
2452 /* No withdrawn routes, no path attributes, no NLRI */
2453 ND_PRINT((ndo, "\n\t End-of-Rib Marker (empty NLRI)"));
2458 /* do something more useful!*/
2460 int aflags, atype, alenlen, alen;
2462 ND_TCHECK2(p[0], 2);
2472 alenlen = bgp_attr_lenlen(aflags, p);
2473 ND_TCHECK2(p[0], alenlen);
2476 if (length < alenlen)
2478 alen = bgp_attr_len(aflags, p);
2483 ND_PRINT((ndo, "\n\t %s (%u), length: %u",
2484 tok2strbuf(bgp_attr_values, "Unknown Attribute",
2486 tokbuf, sizeof(tokbuf)),
2491 ND_PRINT((ndo, ", Flags [%s%s%s%s",
2492 aflags & 0x80 ? "O" : "",
2493 aflags & 0x40 ? "T" : "",
2494 aflags & 0x20 ? "P" : "",
2495 aflags & 0x10 ? "E" : ""));
2497 ND_PRINT((ndo, "+%x", aflags & 0xf));
2498 ND_PRINT((ndo, "]: "));
2504 if (!bgp_attr_print(ndo, atype, p, alen))
2514 * XXX - what if they're using the "Advertisement of
2515 * Multiple Paths in BGP" feature:
2517 * https://datatracker.ietf.org/doc/draft-ietf-idr-add-paths/
2519 * http://tools.ietf.org/html/draft-ietf-idr-add-paths-06
2521 ND_PRINT((ndo, "\n\t Updated routes:"));
2523 char buf[MAXHOSTNAMELEN + 100];
2524 i = decode_prefix4(ndo, p, length, buf, sizeof(buf));
2526 ND_PRINT((ndo, "\n\t (illegal prefix length)"));
2531 goto trunc; /* bytes left, but not enough */
2533 ND_PRINT((ndo, "\n\t %s", buf));
2541 ND_PRINT((ndo, "[|BGP]"));
2545 bgp_notification_print(netdissect_options *ndo,
2546 const u_char *dat, int length)
2548 struct bgp_notification bgpn;
2550 char tokbuf[TOKBUFSIZE];
2551 char tokbuf2[TOKBUFSIZE];
2553 ND_TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
2554 memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
2556 /* some little sanity checking */
2557 if (length<BGP_NOTIFICATION_SIZE)
2560 ND_PRINT((ndo, ", %s (%u)",
2561 tok2strbuf(bgp_notify_major_values, "Unknown Error",
2562 bgpn.bgpn_major, tokbuf, sizeof(tokbuf)),
2565 switch (bgpn.bgpn_major) {
2567 case BGP_NOTIFY_MAJOR_MSG:
2568 ND_PRINT((ndo, ", subcode %s (%u)",
2569 tok2strbuf(bgp_notify_minor_msg_values, "Unknown",
2570 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2573 case BGP_NOTIFY_MAJOR_OPEN:
2574 ND_PRINT((ndo, ", subcode %s (%u)",
2575 tok2strbuf(bgp_notify_minor_open_values, "Unknown",
2576 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2579 case BGP_NOTIFY_MAJOR_UPDATE:
2580 ND_PRINT((ndo, ", subcode %s (%u)",
2581 tok2strbuf(bgp_notify_minor_update_values, "Unknown",
2582 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2585 case BGP_NOTIFY_MAJOR_CAP:
2586 ND_PRINT((ndo, " subcode %s (%u)",
2587 tok2strbuf(bgp_notify_minor_cap_values, "Unknown",
2588 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2590 case BGP_NOTIFY_MAJOR_CEASE:
2591 ND_PRINT((ndo, ", subcode %s (%u)",
2592 tok2strbuf(bgp_notify_minor_cease_values, "Unknown",
2593 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2596 /* draft-ietf-idr-cease-subcode-02 mentions optionally 7 bytes
2597 * for the maxprefix subtype, which may contain AFI, SAFI and MAXPREFIXES
2599 if(bgpn.bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= BGP_NOTIFICATION_SIZE + 7) {
2600 tptr = dat + BGP_NOTIFICATION_SIZE;
2601 ND_TCHECK2(*tptr, 7);
2602 ND_PRINT((ndo, ", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
2603 tok2strbuf(af_values, "Unknown",
2604 EXTRACT_16BITS(tptr), tokbuf, sizeof(tokbuf)),
2605 EXTRACT_16BITS(tptr),
2606 tok2strbuf(bgp_safi_values, "Unknown", *(tptr+2),
2607 tokbuf2, sizeof(tokbuf)),
2609 EXTRACT_32BITS(tptr+3)));
2618 ND_PRINT((ndo, "[|BGP]"));
2622 bgp_route_refresh_print(netdissect_options *ndo,
2623 const u_char *pptr, int len)
2625 const struct bgp_route_refresh *bgp_route_refresh_header;
2626 char tokbuf[TOKBUFSIZE];
2627 char tokbuf2[TOKBUFSIZE];
2629 ND_TCHECK2(pptr[0], BGP_ROUTE_REFRESH_SIZE);
2631 /* some little sanity checking */
2632 if (len<BGP_ROUTE_REFRESH_SIZE)
2635 bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
2637 ND_PRINT((ndo, "\n\t AFI %s (%u), SAFI %s (%u)",
2638 tok2strbuf(af_values,"Unknown",
2639 /* this stinks but the compiler pads the structure
2641 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
2642 tokbuf, sizeof(tokbuf)),
2643 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
2644 tok2strbuf(bgp_safi_values,"Unknown",
2645 bgp_route_refresh_header->safi,
2646 tokbuf2, sizeof(tokbuf2)),
2647 bgp_route_refresh_header->safi));
2649 if (ndo->ndo_vflag > 1) {
2650 ND_TCHECK2(*pptr, len);
2651 print_unknown_data(ndo, pptr, "\n\t ", len);
2656 ND_PRINT((ndo, "[|BGP]"));
2660 bgp_header_print(netdissect_options *ndo,
2661 const u_char *dat, int length)
2664 char tokbuf[TOKBUFSIZE];
2666 ND_TCHECK2(dat[0], BGP_SIZE);
2667 memcpy(&bgp, dat, BGP_SIZE);
2668 ND_PRINT((ndo, "\n\t%s Message (%u), length: %u",
2669 tok2strbuf(bgp_msg_values, "Unknown", bgp.bgp_type,
2670 tokbuf, sizeof(tokbuf)),
2674 switch (bgp.bgp_type) {
2676 bgp_open_print(ndo, dat, length);
2679 bgp_update_print(ndo, dat, length);
2681 case BGP_NOTIFICATION:
2682 bgp_notification_print(ndo, dat, length);
2686 case BGP_ROUTE_REFRESH:
2687 bgp_route_refresh_print(ndo, dat, length);
2690 /* we have no decoder for the BGP message */
2691 ND_TCHECK2(*dat, length);
2692 ND_PRINT((ndo, "\n\t no Message %u decoder", bgp.bgp_type));
2693 print_unknown_data(ndo, dat, "\n\t ", length);
2698 ND_PRINT((ndo, "[|BGP]"));
2703 bgp_print(netdissect_options *ndo,
2704 const u_char *dat, int length)
2708 const u_char *start;
2709 const u_char marker[] = {
2710 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
2711 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
2715 char tokbuf[TOKBUFSIZE];
2718 if (ndo->ndo_snapend < dat + length)
2719 ep = ndo->ndo_snapend;
2721 ND_PRINT((ndo, ": BGP"));
2723 if (ndo->ndo_vflag < 1) /* lets be less chatty */
2729 if (!ND_TTEST2(p[0], 1))
2736 if (!ND_TTEST2(p[0], sizeof(marker)))
2738 if (memcmp(p, marker, sizeof(marker)) != 0) {
2743 /* found BGP header */
2744 ND_TCHECK2(p[0], BGP_SIZE); /*XXX*/
2745 memcpy(&bgp, p, BGP_SIZE);
2748 ND_PRINT((ndo, " [|BGP]"));
2750 hlen = ntohs(bgp.bgp_len);
2751 if (hlen < BGP_SIZE) {
2752 ND_PRINT((ndo, "\n[|BGP Bogus header length %u < %u]", hlen,
2757 if (ND_TTEST2(p[0], hlen)) {
2758 if (!bgp_header_print(ndo, p, hlen))
2763 ND_PRINT((ndo, "\n[|BGP %s]",
2764 tok2strbuf(bgp_msg_values,
2765 "Unknown Message Type",
2767 tokbuf, sizeof(tokbuf))));
2775 ND_PRINT((ndo, " [|BGP]"));
2780 * c-style: whitesmith