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-add support for CLNP and CLNP-VPN NLRIs
[tcpdump] / print-bgp.c
1 /*
2 * Copyright (C) 1999 WIDE Project.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
16 *
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
27 * SUCH DAMAGE.
28 *
29 * Extensively modified by Hannes Gredler (hannes@juniper.net) for more
30 * complete BGP support.
31 */
32
33 #ifdef HAVE_CONFIG_H
34 #include "config.h"
35 #endif
36
37 #ifndef lint
38 static const char rcsid[] _U_ =
39 "@(#) $Header: /tcpdump/master/tcpdump/print-bgp.c,v 1.89 2005-03-22 19:30:59 hannes Exp $";
40 #endif
41
42 #include <tcpdump-stdinc.h>
43
44 #include <stdio.h>
45 #include <string.h>
46
47 #include "interface.h"
48 #include "decode_prefix.h"
49 #include "addrtoname.h"
50 #include "extract.h"
51 #include "bgp.h"
52 #include "l2vpn.h"
53
54 struct bgp {
55 u_int8_t bgp_marker[16];
56 u_int16_t bgp_len;
57 u_int8_t bgp_type;
58 };
59 #define BGP_SIZE 19 /* unaligned */
60
61 #define BGP_OPEN 1
62 #define BGP_UPDATE 2
63 #define BGP_NOTIFICATION 3
64 #define BGP_KEEPALIVE 4
65 #define BGP_ROUTE_REFRESH 5
66
67 static struct tok bgp_msg_values[] = {
68 { BGP_OPEN, "Open"},
69 { BGP_UPDATE, "Update"},
70 { BGP_NOTIFICATION, "Notification"},
71 { BGP_KEEPALIVE, "Keepalive"},
72 { BGP_ROUTE_REFRESH, "Route Refresh"},
73 { 0, NULL}
74 };
75
76 struct bgp_open {
77 u_int8_t bgpo_marker[16];
78 u_int16_t bgpo_len;
79 u_int8_t bgpo_type;
80 u_int8_t bgpo_version;
81 u_int16_t bgpo_myas;
82 u_int16_t bgpo_holdtime;
83 u_int32_t bgpo_id;
84 u_int8_t bgpo_optlen;
85 /* options should follow */
86 };
87 #define BGP_OPEN_SIZE 29 /* unaligned */
88
89 struct bgp_opt {
90 u_int8_t bgpopt_type;
91 u_int8_t bgpopt_len;
92 /* variable length */
93 };
94 #define BGP_OPT_SIZE 2 /* some compilers may pad to 4 bytes */
95
96 #define BGP_UPDATE_MINSIZE 23
97
98 struct bgp_notification {
99 u_int8_t bgpn_marker[16];
100 u_int16_t bgpn_len;
101 u_int8_t bgpn_type;
102 u_int8_t bgpn_major;
103 u_int8_t bgpn_minor;
104 };
105 #define BGP_NOTIFICATION_SIZE 21 /* unaligned */
106
107 struct bgp_route_refresh {
108 u_int8_t bgp_marker[16];
109 u_int16_t len;
110 u_int8_t type;
111 u_int8_t afi[2]; /* the compiler messes this structure up */
112 u_int8_t res; /* when doing misaligned sequences of int8 and int16 */
113 u_int8_t safi; /* afi should be int16 - so we have to access it using */
114 }; /* EXTRACT_16BITS(&bgp_route_refresh->afi) (sigh) */
115 #define BGP_ROUTE_REFRESH_SIZE 23
116
117 struct bgp_attr {
118 u_int8_t bgpa_flags;
119 u_int8_t bgpa_type;
120 union {
121 u_int8_t len;
122 u_int16_t elen;
123 } bgpa_len;
124 #define bgp_attr_len(p) \
125 (((p)->bgpa_flags & 0x10) ? \
126 EXTRACT_16BITS(&(p)->bgpa_len.elen) : (p)->bgpa_len.len)
127 #define bgp_attr_off(p) \
128 (((p)->bgpa_flags & 0x10) ? 4 : 3)
129 };
130
131 #define BGPTYPE_ORIGIN 1
132 #define BGPTYPE_AS_PATH 2
133 #define BGPTYPE_NEXT_HOP 3
134 #define BGPTYPE_MULTI_EXIT_DISC 4
135 #define BGPTYPE_LOCAL_PREF 5
136 #define BGPTYPE_ATOMIC_AGGREGATE 6
137 #define BGPTYPE_AGGREGATOR 7
138 #define BGPTYPE_COMMUNITIES 8 /* RFC1997 */
139 #define BGPTYPE_ORIGINATOR_ID 9 /* RFC1998 */
140 #define BGPTYPE_CLUSTER_LIST 10 /* RFC1998 */
141 #define BGPTYPE_DPA 11 /* draft-ietf-idr-bgp-dpa */
142 #define BGPTYPE_ADVERTISERS 12 /* RFC1863 */
143 #define BGPTYPE_RCID_PATH 13 /* RFC1863 */
144 #define BGPTYPE_MP_REACH_NLRI 14 /* RFC2283 */
145 #define BGPTYPE_MP_UNREACH_NLRI 15 /* RFC2283 */
146 #define BGPTYPE_EXTD_COMMUNITIES 16 /* draft-ietf-idr-bgp-ext-communities */
147 #define BGPTYPE_ATTR_SET 128 /* draft-marques-ppvpn-ibgp */
148
149 #define BGP_MP_NLRI_MINSIZE 3 /* End of RIB Marker detection */
150
151 static struct tok bgp_attr_values[] = {
152 { BGPTYPE_ORIGIN, "Origin"},
153 { BGPTYPE_AS_PATH, "AS Path"},
154 { BGPTYPE_NEXT_HOP, "Next Hop"},
155 { BGPTYPE_MULTI_EXIT_DISC, "Multi Exit Discriminator"},
156 { BGPTYPE_LOCAL_PREF, "Local Preference"},
157 { BGPTYPE_ATOMIC_AGGREGATE, "Atomic Aggregate"},
158 { BGPTYPE_AGGREGATOR, "Aggregator"},
159 { BGPTYPE_COMMUNITIES, "Community"},
160 { BGPTYPE_ORIGINATOR_ID, "Originator ID"},
161 { BGPTYPE_CLUSTER_LIST, "Cluster List"},
162 { BGPTYPE_DPA, "DPA"},
163 { BGPTYPE_ADVERTISERS, "Advertisers"},
164 { BGPTYPE_RCID_PATH, "RCID Path / Cluster ID"},
165 { BGPTYPE_MP_REACH_NLRI, "Multi-Protocol Reach NLRI"},
166 { BGPTYPE_MP_UNREACH_NLRI, "Multi-Protocol Unreach NLRI"},
167 { BGPTYPE_EXTD_COMMUNITIES, "Extended Community"},
168 { BGPTYPE_ATTR_SET, "Attribute Set"},
169 { 255, "Reserved for development"},
170 { 0, NULL}
171 };
172
173 #define BGP_AS_SET 1
174 #define BGP_AS_SEQUENCE 2
175 #define BGP_CONFED_AS_SEQUENCE 3 /* draft-ietf-idr-rfc3065bis-01 */
176 #define BGP_CONFED_AS_SET 4 /* draft-ietf-idr-rfc3065bis-01 */
177
178 static struct tok bgp_as_path_segment_open_values[] = {
179 { BGP_AS_SEQUENCE, ""},
180 { BGP_AS_SET, "{ "},
181 { BGP_CONFED_AS_SEQUENCE, "( "},
182 { BGP_CONFED_AS_SET, "({ "},
183 { 0, NULL}
184 };
185
186 static struct tok bgp_as_path_segment_close_values[] = {
187 { BGP_AS_SEQUENCE, ""},
188 { BGP_AS_SET, "}"},
189 { BGP_CONFED_AS_SEQUENCE, ")"},
190 { BGP_CONFED_AS_SET, "})"},
191 { 0, NULL}
192 };
193
194 #define BGP_OPT_AUTH 1
195 #define BGP_OPT_CAP 2
196
197
198 static struct tok bgp_opt_values[] = {
199 { BGP_OPT_AUTH, "Authentication Information"},
200 { BGP_OPT_CAP, "Capabilities Advertisement"},
201 { 0, NULL}
202 };
203
204 #define BGP_CAPCODE_MP 1
205 #define BGP_CAPCODE_RR 2
206 #define BGP_CAPCODE_ORF 3 /* XXX */
207 #define BGP_CAPCODE_RESTART 64 /* draft-ietf-idr-restart-05 */
208 #define BGP_CAPCODE_AS_NEW 65 /* XXX */
209 #define BGP_CAPCODE_DYN_CAP 67 /* XXX */
210 #define BGP_CAPCODE_RR_CISCO 128
211
212 static struct tok bgp_capcode_values[] = {
213 { BGP_CAPCODE_MP, "Multiprotocol Extensions"},
214 { BGP_CAPCODE_RR, "Route Refresh"},
215 { BGP_CAPCODE_ORF, "Cooperative Route Filtering"},
216 { BGP_CAPCODE_RESTART, "Graceful Restart"},
217 { BGP_CAPCODE_AS_NEW, "32-Bit AS Number"},
218 { BGP_CAPCODE_DYN_CAP, "Dynamic Capability"},
219 { BGP_CAPCODE_RR_CISCO, "Route Refresh (Cisco)"},
220 { 0, NULL}
221 };
222
223 #define BGP_NOTIFY_MAJOR_MSG 1
224 #define BGP_NOTIFY_MAJOR_OPEN 2
225 #define BGP_NOTIFY_MAJOR_UPDATE 3
226 #define BGP_NOTIFY_MAJOR_HOLDTIME 4
227 #define BGP_NOTIFY_MAJOR_FSM 5
228 #define BGP_NOTIFY_MAJOR_CEASE 6
229 #define BGP_NOTIFY_MAJOR_CAP 7
230
231 static struct tok bgp_notify_major_values[] = {
232 { BGP_NOTIFY_MAJOR_MSG, "Message Header Error"},
233 { BGP_NOTIFY_MAJOR_OPEN, "OPEN Message Error"},
234 { BGP_NOTIFY_MAJOR_UPDATE, "UPDATE Message Error"},
235 { BGP_NOTIFY_MAJOR_HOLDTIME,"Hold Timer Expired"},
236 { BGP_NOTIFY_MAJOR_FSM, "Finite State Machine Error"},
237 { BGP_NOTIFY_MAJOR_CEASE, "Cease"},
238 { BGP_NOTIFY_MAJOR_CAP, "Capability Message Error"},
239 { 0, NULL}
240 };
241
242 /* draft-ietf-idr-cease-subcode-02 */
243 #define BGP_NOTIFY_MINOR_CEASE_MAXPRFX 1
244 static struct tok bgp_notify_minor_cease_values[] = {
245 { BGP_NOTIFY_MINOR_CEASE_MAXPRFX, "Maximum Number of Prefixes Reached"},
246 { 2, "Administratively Shutdown"},
247 { 3, "Peer Unconfigured"},
248 { 4, "Administratively Reset"},
249 { 5, "Connection Rejected"},
250 { 6, "Other Configuration Change"},
251 { 7, "Connection Collision Resolution"},
252 { 0, NULL}
253 };
254
255 static struct tok bgp_notify_minor_msg_values[] = {
256 { 1, "Connection Not Synchronized"},
257 { 2, "Bad Message Length"},
258 { 3, "Bad Message Type"},
259 { 0, NULL}
260 };
261
262 static struct tok bgp_notify_minor_open_values[] = {
263 { 1, "Unsupported Version Number"},
264 { 2, "Bad Peer AS"},
265 { 3, "Bad BGP Identifier"},
266 { 4, "Unsupported Optional Parameter"},
267 { 5, "Authentication Failure"},
268 { 6, "Unacceptable Hold Time"},
269 { 0, NULL}
270 };
271
272 static struct tok bgp_notify_minor_update_values[] = {
273 { 1, "Malformed Attribute List"},
274 { 2, "Unrecognized Well-known Attribute"},
275 { 3, "Missing Well-known Attribute"},
276 { 4, "Attribute Flags Error"},
277 { 5, "Attribute Length Error"},
278 { 6, "Invalid ORIGIN Attribute"},
279 { 7, "AS Routing Loop"},
280 { 8, "Invalid NEXT_HOP Attribute"},
281 { 9, "Optional Attribute Error"},
282 { 10, "Invalid Network Field"},
283 { 11, "Malformed AS_PATH"},
284 { 0, NULL}
285 };
286
287 static struct tok bgp_notify_minor_cap_values[] = {
288 { 1, "Invalid Action Value" },
289 { 2, "Invalid Capability Length" },
290 { 3, "Malformed Capability Value" },
291 { 4, "Unsupported Capability Code" },
292 { 0, NULL }
293 };
294
295 static struct tok bgp_origin_values[] = {
296 { 0, "IGP"},
297 { 1, "EGP"},
298 { 2, "Incomplete"},
299 { 0, NULL}
300 };
301
302 /* Subsequent address family identifier, RFC2283 section 7 */
303 #define SAFNUM_RES 0
304 #define SAFNUM_UNICAST 1
305 #define SAFNUM_MULTICAST 2
306 #define SAFNUM_UNIMULTICAST 3
307 /* labeled BGP RFC3107 */
308 #define SAFNUM_LABUNICAST 4
309 #define SAFNUM_TUNNEL 64 /* XXX */
310 #define SAFNUM_VPLS 65 /* XXX */
311 #define SAFNUM_MDT 66 /* XXX */
312 /* Section 4.3.4 of draft-rosen-rfc2547bis-03.txt */
313 #define SAFNUM_VPNUNICAST 128
314 #define SAFNUM_VPNMULTICAST 129
315 #define SAFNUM_VPNUNIMULTICAST 130
316 /* draft-marques-ppvpn-rt-constrain-01.txt */
317 #define SAFNUM_RT_ROUTING_INFO 132
318
319 #define BGP_VPN_RD_LEN 8
320
321 static struct tok bgp_safi_values[] = {
322 { SAFNUM_RES, "Reserved"},
323 { SAFNUM_UNICAST, "Unicast"},
324 { SAFNUM_MULTICAST, "Multicast"},
325 { SAFNUM_UNIMULTICAST, "Unicast+Multicast"},
326 { SAFNUM_LABUNICAST, "labeled Unicast"},
327 { SAFNUM_TUNNEL, "Tunnel"},
328 { SAFNUM_VPLS, "VPLS"},
329 { SAFNUM_MDT, "MDT"},
330 { SAFNUM_VPNUNICAST, "labeled VPN Unicast"},
331 { SAFNUM_VPNMULTICAST, "labeled VPN Multicast"},
332 { SAFNUM_VPNUNIMULTICAST, "labeled VPN Unicast+Multicast"},
333 { SAFNUM_RT_ROUTING_INFO, "Route Target Routing Information"}, /* draft-marques-ppvpn-rt-constrain-01.txt */
334 { 0, NULL }
335 };
336
337 /* well-known community */
338 #define BGP_COMMUNITY_NO_EXPORT 0xffffff01
339 #define BGP_COMMUNITY_NO_ADVERT 0xffffff02
340 #define BGP_COMMUNITY_NO_EXPORT_SUBCONFED 0xffffff03
341
342 /* RFC1700 address family numbers */
343 #define AFNUM_INET 1
344 #define AFNUM_INET6 2
345 #define AFNUM_NSAP 3
346 #define AFNUM_HDLC 4
347 #define AFNUM_BBN1822 5
348 #define AFNUM_802 6
349 #define AFNUM_E163 7
350 #define AFNUM_E164 8
351 #define AFNUM_F69 9
352 #define AFNUM_X121 10
353 #define AFNUM_IPX 11
354 #define AFNUM_ATALK 12
355 #define AFNUM_DECNET 13
356 #define AFNUM_BANYAN 14
357 #define AFNUM_E164NSAP 15
358 /* draft-kompella-ppvpn-l2vpn */
359 #define AFNUM_L2VPN 196 /* still to be approved by IANA */
360
361 static struct tok bgp_afi_values[] = {
362 { 0, "Reserved"},
363 { AFNUM_INET, "IPv4"},
364 { AFNUM_INET6, "IPv6"},
365 { AFNUM_NSAP, "NSAP"},
366 { AFNUM_HDLC, "HDLC"},
367 { AFNUM_BBN1822, "BBN 1822"},
368 { AFNUM_802, "802"},
369 { AFNUM_E163, "E.163"},
370 { AFNUM_E164, "E.164"},
371 { AFNUM_F69, "F.69"},
372 { AFNUM_X121, "X.121"},
373 { AFNUM_IPX, "Novell IPX"},
374 { AFNUM_ATALK, "Appletalk"},
375 { AFNUM_DECNET, "Decnet IV"},
376 { AFNUM_BANYAN, "Banyan Vines"},
377 { AFNUM_E164NSAP, "E.164 with NSAP subaddress"},
378 { AFNUM_L2VPN, "Layer-2 VPN"},
379 { 0, NULL},
380 };
381
382 /* Extended community type - draft-ietf-idr-bgp-ext-communities-05 */
383 #define BGP_EXT_COM_RT_0 0x0002 /* Route Target,Format AS(2bytes):AN(4bytes) */
384 #define BGP_EXT_COM_RT_1 0x0102 /* Route Target,Format IP address:AN(2bytes) */
385 #define BGP_EXT_COM_RT_2 0x0202 /* Route Target,Format AN(4bytes):local(2bytes) */
386 #define BGP_EXT_COM_RO_0 0x0003 /* Route Origin,Format AS(2bytes):AN(4bytes) */
387 #define BGP_EXT_COM_RO_1 0x0103 /* Route Origin,Format IP address:AN(2bytes) */
388 #define BGP_EXT_COM_RO_2 0x0203 /* Route Origin,Format AN(4bytes):local(2bytes) */
389 #define BGP_EXT_COM_LINKBAND 0x4004 /* Link Bandwidth,Format AS(2B):Bandwidth(4B) */
390 /* rfc2547 bgp-mpls-vpns */
391 #define BGP_EXT_COM_CISCO_MCAST 0x0009 /* cisco proprietary */
392
393 #define BGP_EXT_COM_VPN_ORIGIN 0x0005 /* OSPF Domain ID / VPN of Origin - draft-rosen-vpns-ospf-bgp-mpls */
394 #define BGP_EXT_COM_VPN_ORIGIN2 0x0105 /* duplicate - keep for backwards compatability */
395 #define BGP_EXT_COM_VPN_ORIGIN3 0x0205 /* duplicate - keep for backwards compatability */
396 #define BGP_EXT_COM_VPN_ORIGIN4 0x8005 /* duplicate - keep for backwards compatability */
397
398 #define BGP_EXT_COM_OSPF_RTYPE 0x0306 /* OSPF Route Type,Format Area(4B):RouteType(1B):Options(1B) */
399 #define BGP_EXT_COM_OSPF_RTYPE2 0x8000 /* duplicate - keep for backwards compatability */
400
401 #define BGP_EXT_COM_OSPF_RID 0x0107 /* OSPF Router ID,Format RouterID(4B):Unused(2B) */
402 #define BGP_EXT_COM_OSPF_RID2 0x8001 /* duplicate - keep for backwards compatability */
403
404 #define BGP_EXT_COM_L2INFO 0x800a /* draft-kompella-ppvpn-l2vpn */
405
406 static struct tok bgp_extd_comm_flag_values[] = {
407 { 0x8000, "vendor-specific"},
408 { 0x4000, "non-transitive"},
409 { 0, NULL},
410 };
411
412 static struct tok bgp_extd_comm_subtype_values[] = {
413 { BGP_EXT_COM_RT_0, "target"},
414 { BGP_EXT_COM_RT_1, "target"},
415 { BGP_EXT_COM_RT_2, "target"},
416 { BGP_EXT_COM_RO_0, "origin"},
417 { BGP_EXT_COM_RO_1, "origin"},
418 { BGP_EXT_COM_RO_2, "origin"},
419 { BGP_EXT_COM_LINKBAND, "link-BW"},
420 { BGP_EXT_COM_CISCO_MCAST, "mdt-group"},
421 { BGP_EXT_COM_VPN_ORIGIN, "ospf-domain"},
422 { BGP_EXT_COM_VPN_ORIGIN2, "ospf-domain"},
423 { BGP_EXT_COM_VPN_ORIGIN3, "ospf-domain"},
424 { BGP_EXT_COM_VPN_ORIGIN4, "ospf-domain"},
425 { BGP_EXT_COM_OSPF_RTYPE, "ospf-route-type"},
426 { BGP_EXT_COM_OSPF_RTYPE2, "ospf-route-type"},
427 { BGP_EXT_COM_OSPF_RID, "ospf-router-id"},
428 { BGP_EXT_COM_OSPF_RID2, "ospf-router-id"},
429 { BGP_EXT_COM_L2INFO, "layer2-info"},
430 { 0, NULL},
431 };
432
433 /* OSPF codes for BGP_EXT_COM_OSPF_RTYPE draft-rosen-vpns-ospf-bgp-mpls */
434 #define BGP_OSPF_RTYPE_RTR 1 /* OSPF Router LSA */
435 #define BGP_OSPF_RTYPE_NET 2 /* OSPF Network LSA */
436 #define BGP_OSPF_RTYPE_SUM 3 /* OSPF Summary LSA */
437 #define BGP_OSPF_RTYPE_EXT 5 /* OSPF External LSA, note that ASBR doesn't apply to MPLS-VPN */
438 #define BGP_OSPF_RTYPE_NSSA 7 /* OSPF NSSA External*/
439 #define BGP_OSPF_RTYPE_SHAM 129 /* OSPF-MPLS-VPN Sham link */
440 #define BGP_OSPF_RTYPE_METRIC_TYPE 0x1 /* LSB of RTYPE Options Field */
441
442 static struct tok bgp_extd_comm_ospf_rtype_values[] = {
443 { BGP_OSPF_RTYPE_RTR, "Router" },
444 { BGP_OSPF_RTYPE_NET, "Network" },
445 { BGP_OSPF_RTYPE_SUM, "Summary" },
446 { BGP_OSPF_RTYPE_EXT, "External" },
447 { BGP_OSPF_RTYPE_NSSA,"NSSA External" },
448 { BGP_OSPF_RTYPE_SHAM,"MPLS-VPN Sham" },
449 { 0, NULL },
450 };
451
452 int
453 decode_prefix4(const u_char *pptr, char *buf, u_int buflen)
454 {
455 struct in_addr addr;
456 u_int plen;
457
458 TCHECK(pptr[0]);
459 plen = pptr[0];
460 if (32 < plen)
461 return -1;
462
463 memset(&addr, 0, sizeof(addr));
464 TCHECK2(pptr[1], (plen + 7) / 8);
465 memcpy(&addr, &pptr[1], (plen + 7) / 8);
466 if (plen % 8) {
467 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
468 ((0xff00 >> (plen % 8)) & 0xff);
469 }
470 snprintf(buf, buflen, "%s/%d", getname((u_char *)&addr), plen);
471 return 1 + (plen + 7) / 8;
472
473 trunc:
474 return -2;
475 }
476
477 static int
478 decode_labeled_prefix4(const u_char *pptr, char *buf, u_int buflen)
479 {
480 struct in_addr addr;
481 u_int plen;
482
483 TCHECK(pptr[0]);
484 plen = pptr[0]; /* get prefix length */
485
486 /* this is one of the weirdnesses of rfc3107
487 the label length (actually the label + COS bits)
488 is added to the prefix length;
489 we also do only read out just one label -
490 there is no real application for advertisement of
491 stacked labels in a a single BGP message
492 */
493
494 plen-=24; /* adjust prefixlen - labellength */
495
496 if (32 < plen)
497 return -1;
498
499 memset(&addr, 0, sizeof(addr));
500 TCHECK2(pptr[4], (plen + 7) / 8);
501 memcpy(&addr, &pptr[4], (plen + 7) / 8);
502 if (plen % 8) {
503 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
504 ((0xff00 >> (plen % 8)) & 0xff);
505 }
506 /* the label may get offsetted by 4 bits so lets shift it right */
507 snprintf(buf, buflen, "%s/%d, label:%u %s",
508 getname((u_char *)&addr),
509 plen,
510 EXTRACT_24BITS(pptr+1)>>4,
511 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
512
513 return 4 + (plen + 7) / 8;
514
515 trunc:
516 return -2;
517 }
518
519 /* RDs and RTs share the same semantics
520 * we use bgp_vpn_rd_print for
521 * printing route targets inside a NLRI */
522 char *
523 bgp_vpn_rd_print (const u_char *pptr) {
524
525 /* allocate space for the largest possible string */
526 static char rd[sizeof("xxxxxxxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")];
527 char *pos = rd;
528
529 /* ok lets load the RD format */
530 switch (EXTRACT_16BITS(pptr)) {
531
532 /* AS:IP-address fmt*/
533 case 0:
534 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u.%u.%u.%u",
535 EXTRACT_16BITS(pptr+2), *(pptr+4), *(pptr+5), *(pptr+6), *(pptr+7));
536 break;
537 /* IP-address:AS fmt*/
538
539 case 1:
540 snprintf(pos, sizeof(rd) - (pos - rd), "%u.%u.%u.%u:%u",
541 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
542 break;
543
544 /* 4-byte-AS:number fmt*/
545 case 2:
546 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u (%u.%u.%u.%u:%u)",
547 EXTRACT_32BITS(pptr+2), EXTRACT_16BITS(pptr+6),
548 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
549 break;
550 default:
551 snprintf(pos, sizeof(rd) - (pos - rd), "unknown RD format");
552 break;
553 }
554 pos += strlen(pos);
555 *(pos) = '\0';
556 return (rd);
557 }
558
559 static int
560 decode_rt_routing_info(const u_char *pptr, char *buf, u_int buflen)
561 {
562 u_int8_t route_target[8];
563 u_int plen;
564
565 TCHECK(pptr[0]);
566 plen = pptr[0]; /* get prefix length */
567
568 plen-=32; /* adjust prefix length */
569
570 if (0 < plen)
571 return -1;
572
573 memset(&route_target, 0, sizeof(route_target));
574 TCHECK2(pptr[1], (plen + 7) / 8);
575 memcpy(&route_target, &pptr[1], (plen + 7) / 8);
576 if (plen % 8) {
577 ((u_char *)&route_target)[(plen + 7) / 8 - 1] &=
578 ((0xff00 >> (plen % 8)) & 0xff);
579 }
580 snprintf(buf, buflen, "origin AS: %u, route target %s",
581 EXTRACT_32BITS(pptr+1),
582 bgp_vpn_rd_print((u_char *)&route_target));
583
584 return 5 + (plen + 7) / 8;
585
586 trunc:
587 return -2;
588 }
589
590 static int
591 decode_labeled_vpn_prefix4(const u_char *pptr, char *buf, u_int buflen)
592 {
593 struct in_addr addr;
594 u_int plen;
595
596 TCHECK(pptr[0]);
597 plen = pptr[0]; /* get prefix length */
598
599 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
600
601 if (32 < plen)
602 return -1;
603
604 memset(&addr, 0, sizeof(addr));
605 TCHECK2(pptr[12], (plen + 7) / 8);
606 memcpy(&addr, &pptr[12], (plen + 7) / 8);
607 if (plen % 8) {
608 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
609 ((0xff00 >> (plen % 8)) & 0xff);
610 }
611 /* the label may get offsetted by 4 bits so lets shift it right */
612 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
613 bgp_vpn_rd_print(pptr+4),
614 getname((u_char *)&addr),
615 plen,
616 EXTRACT_24BITS(pptr+1)>>4,
617 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
618
619 return 12 + (plen + 7) / 8;
620
621 trunc:
622 return -2;
623 }
624
625 static int
626 decode_labeled_vpn_l2(const u_char *pptr, char *buf, u_int buflen)
627 {
628 int plen,tlen,strlen,tlv_type,tlv_len,ttlv_len;
629
630 TCHECK2(pptr[0], 2);
631 plen=EXTRACT_16BITS(pptr);
632 tlen=plen;
633 pptr+=2;
634 TCHECK2(pptr[0],15);
635 strlen=snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u",
636 bgp_vpn_rd_print(pptr),
637 EXTRACT_16BITS(pptr+8),
638 EXTRACT_16BITS(pptr+10),
639 EXTRACT_24BITS(pptr+12)>>4); /* the label is offsetted by 4 bits so lets shift it right */
640 pptr+=15;
641 tlen-=15;
642
643 /* ok now the variable part - lets read out TLVs*/
644 while (tlen>0) {
645 if (tlen < 3)
646 return -1;
647 TCHECK2(pptr[0], 3);
648 tlv_type=*pptr++;
649 tlv_len=EXTRACT_16BITS(pptr);
650 ttlv_len=tlv_len;
651 pptr+=2;
652
653 switch(tlv_type) {
654 case 1:
655 strlen+=snprintf(buf+strlen,buflen-strlen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
656 tlv_type,
657 tlv_len);
658 ttlv_len=ttlv_len/8+1; /* how many bytes do we need to read ? */
659 while (ttlv_len>0) {
660 TCHECK(pptr[0]);
661 strlen+=snprintf(buf+strlen,buflen-strlen, "%02x",*pptr++);
662 ttlv_len--;
663 }
664 break;
665 default:
666 snprintf(buf+strlen,buflen-strlen, "\n\t\tunknown TLV #%u, length: %u",
667 tlv_type,
668 tlv_len);
669 break;
670 }
671 tlen-=(tlv_len<<3); /* the tlv-length is expressed in bits so lets shift it tright */
672 }
673 return plen+2;
674
675 trunc:
676 return -2;
677 }
678
679 #ifdef INET6
680 int
681 decode_prefix6(const u_char *pd, char *buf, u_int buflen)
682 {
683 struct in6_addr addr;
684 u_int plen;
685
686 TCHECK(pd[0]);
687 plen = pd[0];
688 if (128 < plen)
689 return -1;
690
691 memset(&addr, 0, sizeof(addr));
692 TCHECK2(pd[1], (plen + 7) / 8);
693 memcpy(&addr, &pd[1], (plen + 7) / 8);
694 if (plen % 8) {
695 addr.s6_addr[(plen + 7) / 8 - 1] &=
696 ((0xff00 >> (plen % 8)) & 0xff);
697 }
698 snprintf(buf, buflen, "%s/%d", getname6((u_char *)&addr), plen);
699 return 1 + (plen + 7) / 8;
700
701 trunc:
702 return -2;
703 }
704
705 static int
706 decode_labeled_prefix6(const u_char *pptr, char *buf, u_int buflen)
707 {
708 struct in6_addr addr;
709 u_int plen;
710
711 TCHECK(pptr[0]);
712 plen = pptr[0]; /* get prefix length */
713 plen-=24; /* adjust prefixlen - labellength */
714
715 if (128 < plen)
716 return -1;
717
718 memset(&addr, 0, sizeof(addr));
719 TCHECK2(pptr[4], (plen + 7) / 8);
720 memcpy(&addr, &pptr[4], (plen + 7) / 8);
721 if (plen % 8) {
722 addr.s6_addr[(plen + 7) / 8 - 1] &=
723 ((0xff00 >> (plen % 8)) & 0xff);
724 }
725 /* the label may get offsetted by 4 bits so lets shift it right */
726 snprintf(buf, buflen, "%s/%d, label:%u %s",
727 getname6((u_char *)&addr),
728 plen,
729 EXTRACT_24BITS(pptr+1)>>4,
730 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
731
732 return 4 + (plen + 7) / 8;
733
734 trunc:
735 return -2;
736 }
737
738 static int
739 decode_labeled_vpn_prefix6(const u_char *pptr, char *buf, u_int buflen)
740 {
741 struct in6_addr addr;
742 u_int plen;
743
744 TCHECK(pptr[0]);
745 plen = pptr[0]; /* get prefix length */
746
747 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
748
749 if (128 < plen)
750 return -1;
751
752 memset(&addr, 0, sizeof(addr));
753 TCHECK2(pptr[12], (plen + 7) / 8);
754 memcpy(&addr, &pptr[12], (plen + 7) / 8);
755 if (plen % 8) {
756 addr.s6_addr[(plen + 7) / 8 - 1] &=
757 ((0xff00 >> (plen % 8)) & 0xff);
758 }
759 /* the label may get offsetted by 4 bits so lets shift it right */
760 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
761 bgp_vpn_rd_print(pptr+4),
762 getname6((u_char *)&addr),
763 plen,
764 EXTRACT_24BITS(pptr+1)>>4,
765 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
766
767 return 12 + (plen + 7) / 8;
768
769 trunc:
770 return -2;
771 }
772 #endif
773
774 static int
775 decode_labeled_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
776 {
777 u_int8_t addr[19];
778 u_int plen;
779
780 TCHECK(pptr[0]);
781 plen = pptr[0]; /* get prefix length */
782 plen-=24; /* adjust prefixlen - labellength */
783
784 if (152 < plen)
785 return -1;
786
787 memset(&addr, 0, sizeof(addr));
788 TCHECK2(pptr[4], (plen + 7) / 8);
789 memcpy(&addr, &pptr[4], (plen + 7) / 8);
790 if (plen % 8) {
791 addr[(plen + 7) / 8 - 1] &=
792 ((0xff00 >> (plen % 8)) & 0xff);
793 }
794 /* the label may get offsetted by 4 bits so lets shift it right */
795 snprintf(buf, buflen, "%s/%d, label:%u %s",
796 isonsap_string(addr,(plen + 7) / 8 - 1),
797 plen,
798 EXTRACT_24BITS(pptr+1)>>4,
799 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
800
801 return 4 + (plen + 7) / 8;
802
803 trunc:
804 return -2;
805 }
806
807 static int
808 decode_labeled_vpn_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
809 {
810 u_int8_t addr[19];
811 u_int plen;
812
813 TCHECK(pptr[0]);
814 plen = pptr[0]; /* get prefix length */
815
816 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
817
818 if (152 < plen)
819 return -1;
820
821 memset(&addr, 0, sizeof(addr));
822 TCHECK2(pptr[12], (plen + 7) / 8);
823 memcpy(&addr, &pptr[12], (plen + 7) / 8);
824 if (plen % 8) {
825 addr[(plen + 7) / 8 - 1] &=
826 ((0xff00 >> (plen % 8)) & 0xff);
827 }
828 /* the label may get offsetted by 4 bits so lets shift it right */
829 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
830 bgp_vpn_rd_print(pptr+4),
831 isonsap_string(addr,(plen + 7) / 8 - 1),
832 plen,
833 EXTRACT_24BITS(pptr+1)>>4,
834 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
835
836 return 12 + (plen + 7) / 8;
837
838 trunc:
839 return -2;
840 }
841
842 static int
843 bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len)
844 {
845 int i;
846 u_int16_t af;
847 u_int8_t safi, snpa;
848 union { /* copy buffer for bandwidth values */
849 float f;
850 u_int32_t i;
851 } bw;
852 int advance;
853 int tlen;
854 const u_char *tptr;
855 char buf[MAXHOSTNAMELEN + 100];
856 char tokbuf[TOKBUFSIZE];
857
858 tptr = pptr;
859 tlen=len;
860
861 switch (attr->bgpa_type) {
862 case BGPTYPE_ORIGIN:
863 if (len != 1)
864 printf("invalid len");
865 else {
866 TCHECK(*tptr);
867 printf("%s", tok2strbuf(bgp_origin_values,
868 "Unknown Origin Typecode",
869 tptr[0],
870 tokbuf, sizeof(tokbuf)));
871 }
872 break;
873
874 case BGPTYPE_AS_PATH:
875 if (len % 2) {
876 printf("invalid len");
877 break;
878 }
879 if (!len) {
880 printf("empty");
881 break;
882 }
883
884 while (tptr < pptr + len) {
885 TCHECK(tptr[0]);
886 printf("%s", tok2strbuf(bgp_as_path_segment_open_values,
887 "?", tptr[0],
888 tokbuf, sizeof(tokbuf)));
889 for (i = 0; i < tptr[1] * 2; i += 2) {
890 TCHECK2(tptr[2 + i], 2);
891 printf("%u ", EXTRACT_16BITS(&tptr[2 + i]));
892 }
893 TCHECK(tptr[0]);
894 printf("%s", tok2strbuf(bgp_as_path_segment_close_values,
895 "?", tptr[0],
896 tokbuf, sizeof(tokbuf)));
897 TCHECK(tptr[1]);
898 tptr += 2 + tptr[1] * 2;
899 }
900 break;
901 case BGPTYPE_NEXT_HOP:
902 if (len != 4)
903 printf("invalid len");
904 else {
905 TCHECK2(tptr[0], 4);
906 printf("%s", getname(tptr));
907 }
908 break;
909 case BGPTYPE_MULTI_EXIT_DISC:
910 case BGPTYPE_LOCAL_PREF:
911 if (len != 4)
912 printf("invalid len");
913 else {
914 TCHECK2(tptr[0], 4);
915 printf("%u", EXTRACT_32BITS(tptr));
916 }
917 break;
918 case BGPTYPE_ATOMIC_AGGREGATE:
919 if (len != 0)
920 printf("invalid len");
921 break;
922 case BGPTYPE_AGGREGATOR:
923 if (len != 6) {
924 printf("invalid len");
925 break;
926 }
927 TCHECK2(tptr[0], 6);
928 printf(" AS #%u, origin %s", EXTRACT_16BITS(tptr),
929 getname(tptr + 2));
930 break;
931 case BGPTYPE_COMMUNITIES:
932 if (len % 4) {
933 printf("invalid len");
934 break;
935 }
936 while (tlen>0) {
937 u_int32_t comm;
938 TCHECK2(tptr[0], 4);
939 comm = EXTRACT_32BITS(tptr);
940 switch (comm) {
941 case BGP_COMMUNITY_NO_EXPORT:
942 printf(" NO_EXPORT");
943 break;
944 case BGP_COMMUNITY_NO_ADVERT:
945 printf(" NO_ADVERTISE");
946 break;
947 case BGP_COMMUNITY_NO_EXPORT_SUBCONFED:
948 printf(" NO_EXPORT_SUBCONFED");
949 break;
950 default:
951 printf("%u:%u%s",
952 (comm >> 16) & 0xffff,
953 comm & 0xffff,
954 (tlen>4) ? ", " : "");
955 break;
956 }
957 tlen -=4;
958 tptr +=4;
959 }
960 break;
961 case BGPTYPE_ORIGINATOR_ID:
962 if (len != 4) {
963 printf("invalid len");
964 break;
965 }
966 TCHECK2(tptr[0], 4);
967 printf("%s",getname(tptr));
968 break;
969 case BGPTYPE_CLUSTER_LIST:
970 if (len % 4) {
971 printf("invalid len");
972 break;
973 }
974 while (tlen>0) {
975 TCHECK2(tptr[0], 4);
976 printf("%s%s",
977 getname(tptr),
978 (tlen>4) ? ", " : "");
979 tlen -=4;
980 tptr +=4;
981 }
982 break;
983 case BGPTYPE_MP_REACH_NLRI:
984 TCHECK2(tptr[0], 3);
985 af = EXTRACT_16BITS(tptr);
986 safi = tptr[2];
987
988 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
989 tok2strbuf(bgp_afi_values, "Unknown AFI", af,
990 tokbuf, sizeof(tokbuf)),
991 af,
992 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
993 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
994 tokbuf, sizeof(tokbuf)),
995 safi);
996
997 switch(af<<8 | safi) {
998 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
999 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1000 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1001 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1002 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1003 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1004 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1005 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1006 #ifdef INET6
1007 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1008 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1009 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1010 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1011 case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1012 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1013 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1014 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1015 #endif
1016 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1017 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1018 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1019 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1020 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1021 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1022 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1023 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1024 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1025 break;
1026 default:
1027 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1028 if (vflag <= 1)
1029 print_unknown_data(tptr,"\n\t ",tlen);
1030 goto done;
1031 break;
1032 }
1033
1034 tptr +=3;
1035
1036 TCHECK(tptr[0]);
1037 tlen = tptr[0];
1038 tptr++;
1039
1040 if (tlen) {
1041 printf("\n\t nexthop: ");
1042 while (tlen > 0) {
1043 switch(af<<8 | safi) {
1044 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1045 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1046 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1047 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1048 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1049 if (tlen < (int)sizeof(struct in_addr)) {
1050 printf("invalid len");
1051 tlen = 0;
1052 } else {
1053 TCHECK2(tptr[0], sizeof(struct in_addr));
1054 printf("%s",getname(tptr));
1055 tlen -= sizeof(struct in_addr);
1056 tptr += sizeof(struct in_addr);
1057 }
1058 break;
1059 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1060 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1061 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1062 if (tlen < (int)(sizeof(struct in_addr)+BGP_VPN_RD_LEN)) {
1063 printf("invalid len");
1064 tlen = 0;
1065 } else {
1066 TCHECK2(tptr[0], sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1067 printf("RD: %s, %s",
1068 bgp_vpn_rd_print(tptr),
1069 getname(tptr+BGP_VPN_RD_LEN));
1070 tlen -= (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1071 tptr += (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1072 }
1073 break;
1074 #ifdef INET6
1075 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1076 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1077 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1078 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1079 case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1080 if (tlen < (int)sizeof(struct in6_addr)) {
1081 printf("invalid len");
1082 tlen = 0;
1083 } else {
1084 TCHECK2(tptr[0], sizeof(struct in6_addr));
1085 printf("%s", getname6(tptr));
1086 tlen -= sizeof(struct in6_addr);
1087 tptr += sizeof(struct in6_addr);
1088 }
1089 break;
1090 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1091 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1092 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1093 if (tlen < (int)(sizeof(struct in6_addr)+BGP_VPN_RD_LEN)) {
1094 printf("invalid len");
1095 tlen = 0;
1096 } else {
1097 TCHECK2(tptr[0], sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1098 printf("RD: %s, %s",
1099 bgp_vpn_rd_print(tptr),
1100 getname6(tptr+BGP_VPN_RD_LEN));
1101 tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1102 tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1103 }
1104 break;
1105 #endif
1106 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1107 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1108 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1109 if (tlen < (int)sizeof(struct in_addr)) {
1110 printf("invalid len");
1111 tlen = 0;
1112 } else {
1113 TCHECK2(tptr[0], sizeof(struct in_addr));
1114 printf("%s", getname(tptr));
1115 tlen -= (sizeof(struct in_addr));
1116 tptr += (sizeof(struct in_addr));
1117 }
1118 break;
1119 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1120 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1121 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1122 TCHECK2(tptr[0], tlen);
1123 printf("%s",isonsap_string(tptr,tlen));
1124 tptr += tlen;
1125 tlen = 0;
1126 break;
1127
1128 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1129 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1130 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1131 if (tlen < BGP_VPN_RD_LEN+1) {
1132 printf("invalid len");
1133 tlen = 0;
1134 } else {
1135 TCHECK2(tptr[0], tlen);
1136 printf("RD: %s, %s",
1137 bgp_vpn_rd_print(tptr),
1138 isonsap_string(tptr+BGP_VPN_RD_LEN,tlen-BGP_VPN_RD_LEN));
1139 /* rfc986 mapped IPv4 address ? */
1140 if (EXTRACT_32BITS(tptr+BGP_VPN_RD_LEN) == 0x47000601)
1141 printf(" = %s", getname(tptr+BGP_VPN_RD_LEN+4));
1142 tptr += tlen;
1143 tlen = 0;
1144 }
1145 break;
1146 default:
1147 TCHECK2(tptr[0], tlen);
1148 printf("no AFI %u/SAFI %u decoder",af,safi);
1149 if (vflag <= 1)
1150 print_unknown_data(tptr,"\n\t ",tlen);
1151 tptr += tlen;
1152 tlen = 0;
1153 goto done;
1154 break;
1155 }
1156 }
1157 }
1158 tptr += tlen;
1159
1160 TCHECK(tptr[0]);
1161 snpa = tptr[0];
1162 tptr++;
1163
1164 if (snpa) {
1165 printf("\n\t %u SNPA", snpa);
1166 for (/*nothing*/; snpa > 0; snpa--) {
1167 TCHECK(tptr[0]);
1168 printf("\n\t %d bytes", tptr[0]);
1169 tptr += tptr[0] + 1;
1170 }
1171 } else {
1172 printf(", no SNPA");
1173 }
1174
1175 while (len - (tptr - pptr) > 0) {
1176 switch (af<<8 | safi) {
1177 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1178 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1179 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1180 advance = decode_prefix4(tptr, buf, sizeof(buf));
1181 if (advance == -1)
1182 printf("\n\t (illegal prefix length)");
1183 else if (advance == -2)
1184 goto trunc;
1185 else
1186 printf("\n\t %s", buf);
1187 break;
1188 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1189 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1190 if (advance == -1)
1191 printf("\n\t (illegal prefix length)");
1192 else if (advance == -2)
1193 goto trunc;
1194 else
1195 printf("\n\t %s", buf);
1196 break;
1197 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1198 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1199 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1200 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1201 if (advance == -1)
1202 printf("\n\t (illegal prefix length)");
1203 else if (advance == -2)
1204 goto trunc;
1205 else
1206 printf("\n\t %s", buf);
1207 break;
1208 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1209 advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1210 if (advance == -1)
1211 printf("\n\t (illegal prefix length)");
1212 else if (advance == -2)
1213 goto trunc;
1214 else
1215 printf("\n\t %s", buf);
1216 break;
1217 #ifdef INET6
1218 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1219 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1220 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1221 advance = decode_prefix6(tptr, buf, sizeof(buf));
1222 if (advance == -1)
1223 printf("\n\t (illegal prefix length)");
1224 else if (advance == -2)
1225 goto trunc;
1226 else
1227 printf("\n\t %s", buf);
1228 break;
1229 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1230 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1231 if (advance == -1)
1232 printf("\n\t (illegal prefix length)");
1233 else if (advance == -2)
1234 goto trunc;
1235 else
1236 printf("\n\t %s", buf);
1237 break;
1238 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1239 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1240 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1241 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1242 if (advance == -1)
1243 printf("\n\t (illegal prefix length)");
1244 else if (advance == -2)
1245 goto trunc;
1246 else
1247 printf("\n\t %s", buf);
1248 break;
1249 case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1250 advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1251 if (advance == -1)
1252 printf("\n\t (illegal prefix length)");
1253 else if (advance == -2)
1254 goto trunc;
1255 else
1256 printf("\n\t %s", buf);
1257 break;
1258 #endif
1259 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1260 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1261 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1262 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1263 if (advance == -1)
1264 printf("\n\t (illegal length)");
1265 else if (advance == -2)
1266 goto trunc;
1267 else
1268 printf("\n\t %s", buf);
1269 break;
1270 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1271 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1272 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1273 advance = decode_labeled_clnp_prefix(tptr, buf, sizeof(buf));
1274 if (advance == -1)
1275 printf("\n\t (illegal prefix length)");
1276 else if (advance == -2)
1277 goto trunc;
1278 else
1279 printf("\n\t %s", buf);
1280 break;
1281 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1282 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1283 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1284 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1285 if (advance == -1)
1286 printf("\n\t (illegal prefix length)");
1287 else if (advance == -2)
1288 goto trunc;
1289 else
1290 printf("\n\t %s", buf);
1291 break;
1292 default:
1293 TCHECK2(*tptr,tlen);
1294 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1295 if (vflag <= 1)
1296 print_unknown_data(tptr,"\n\t ",tlen);
1297 advance = 0;
1298 tptr = pptr + len;
1299 break;
1300 }
1301 break;
1302
1303 tptr += advance;
1304 }
1305 done:
1306 break;
1307
1308 case BGPTYPE_MP_UNREACH_NLRI:
1309 TCHECK2(tptr[0], BGP_MP_NLRI_MINSIZE);
1310 af = EXTRACT_16BITS(tptr);
1311 safi = tptr[2];
1312
1313 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1314 tok2strbuf(bgp_afi_values, "Unknown AFI", af,
1315 tokbuf, sizeof(tokbuf)),
1316 af,
1317 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1318 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1319 tokbuf, sizeof(tokbuf)),
1320 safi);
1321
1322 if (len == BGP_MP_NLRI_MINSIZE)
1323 printf("\n\t End-of-Rib Marker (empty NLRI)");
1324
1325 tptr += 3;
1326
1327 while (len - (tptr - pptr) > 0) {
1328 switch (af<<8 | safi) {
1329 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1330 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1331 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1332 advance = decode_prefix4(tptr, buf, sizeof(buf));
1333 if (advance == -1)
1334 printf("\n\t (illegal prefix length)");
1335 else if (advance == -2)
1336 goto trunc;
1337 else
1338 printf("\n\t %s", buf);
1339 break;
1340 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1341 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1342 if (advance == -1)
1343 printf("\n\t (illegal prefix length)");
1344 else if (advance == -2)
1345 goto trunc;
1346 else
1347 printf("\n\t %s", buf);
1348 break;
1349 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1350 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1351 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1352 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1353 if (advance == -1)
1354 printf("\n\t (illegal prefix length)");
1355 else if (advance == -2)
1356 goto trunc;
1357 else
1358 printf("\n\t %s", buf);
1359 break;
1360 #ifdef INET6
1361 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1362 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1363 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1364 advance = decode_prefix6(tptr, buf, sizeof(buf));
1365 if (advance == -1)
1366 printf("\n\t (illegal prefix length)");
1367 else if (advance == -2)
1368 goto trunc;
1369 else
1370 printf("\n\t %s", buf);
1371 break;
1372 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1373 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1374 if (advance == -1)
1375 printf("\n\t (illegal prefix length)");
1376 else if (advance == -2)
1377 goto trunc;
1378 else
1379 printf("\n\t %s", buf);
1380 break;
1381 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1382 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1383 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1384 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1385 if (advance == -1)
1386 printf("\n\t (illegal prefix length)");
1387 else if (advance == -2)
1388 goto trunc;
1389 else
1390 printf("\n\t %s", buf);
1391 break;
1392 #endif
1393 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1394 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1395 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1396 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1397 if (advance == -1)
1398 printf("\n\t (illegal length)");
1399 else if (advance == -2)
1400 goto trunc;
1401 else
1402 printf("\n\t %s", buf);
1403 break;
1404 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1405 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1406 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1407 advance = decode_labeled_clnp_prefix(tptr, buf, sizeof(buf));
1408 if (advance == -1)
1409 printf("\n\t (illegal prefix length)");
1410 else if (advance == -2)
1411 goto trunc;
1412 else
1413 printf("\n\t %s", buf);
1414 break;
1415 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1416 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1417 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1418 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1419 if (advance == -1)
1420 printf("\n\t (illegal prefix length)");
1421 else if (advance == -2)
1422 goto trunc;
1423 else
1424 printf("\n\t %s", buf);
1425 break;
1426 default:
1427 TCHECK2(*(tptr-3),tlen);
1428 printf("no AFI %u / SAFI %u decoder",af,safi);
1429 if (vflag <= 1)
1430 print_unknown_data(tptr-3,"\n\t ",tlen);
1431 advance = 0;
1432 tptr = pptr + len;
1433 break;
1434 }
1435 break;
1436 tptr += advance;
1437 }
1438 break;
1439 case BGPTYPE_EXTD_COMMUNITIES:
1440 if (len % 8) {
1441 printf("invalid len");
1442 break;
1443 }
1444 while (tlen>0) {
1445 u_int16_t extd_comm;
1446
1447 TCHECK2(tptr[0], 2);
1448 extd_comm=EXTRACT_16BITS(tptr);
1449
1450 printf("\n\t %s (0x%04x), Flags [%s]",
1451 tok2strbuf(bgp_extd_comm_subtype_values,
1452 "unknown extd community typecode",
1453 extd_comm, tokbuf, sizeof(tokbuf)),
1454 extd_comm,
1455 bittok2str(bgp_extd_comm_flag_values, "none", extd_comm));
1456
1457 TCHECK2(*(tptr+2), 6);
1458 switch(extd_comm) {
1459 case BGP_EXT_COM_RT_0:
1460 case BGP_EXT_COM_RO_0:
1461 printf(": %u:%s",
1462 EXTRACT_16BITS(tptr+2),
1463 getname(tptr+4));
1464 break;
1465 case BGP_EXT_COM_RT_1:
1466 case BGP_EXT_COM_RO_1:
1467 printf(": %s:%u",
1468 getname(tptr+2),
1469 EXTRACT_16BITS(tptr+6));
1470 break;
1471 case BGP_EXT_COM_RT_2:
1472 case BGP_EXT_COM_RO_2:
1473 printf(": %u:%u",
1474 EXTRACT_32BITS(tptr+2),
1475 EXTRACT_16BITS(tptr+6));
1476 break;
1477 case BGP_EXT_COM_LINKBAND:
1478 bw.i = EXTRACT_32BITS(tptr+2);
1479 printf(": bandwidth: %.3f Mbps",
1480 bw.f*8/1000000);
1481 break;
1482 case BGP_EXT_COM_CISCO_MCAST:
1483 printf(": AS %u, group %s",
1484 EXTRACT_16BITS(tptr+2),
1485 getname(tptr+4));
1486 break;
1487 case BGP_EXT_COM_VPN_ORIGIN:
1488 case BGP_EXT_COM_VPN_ORIGIN2:
1489 case BGP_EXT_COM_VPN_ORIGIN3:
1490 case BGP_EXT_COM_VPN_ORIGIN4:
1491 case BGP_EXT_COM_OSPF_RID:
1492 case BGP_EXT_COM_OSPF_RID2:
1493 printf("%s", getname(tptr+2));
1494 break;
1495 case BGP_EXT_COM_OSPF_RTYPE:
1496 case BGP_EXT_COM_OSPF_RTYPE2:
1497 printf(": area:%s, router-type:%s, metric-type:%s%s",
1498 getname(tptr+2),
1499 tok2strbuf(bgp_extd_comm_ospf_rtype_values,
1500 "unknown (0x%02x)",
1501 *(tptr+6),
1502 tokbuf, sizeof(tokbuf)),
1503 (*(tptr+7) & BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "",
1504 (*(tptr+6) == (BGP_OSPF_RTYPE_EXT ||BGP_OSPF_RTYPE_NSSA )) ? "E1" : "");
1505 break;
1506 case BGP_EXT_COM_L2INFO:
1507 printf(": %s Control Flags [0x%02x]:MTU %u",
1508 tok2strbuf(l2vpn_encaps_values,
1509 "unknown encaps",
1510 *(tptr+2),
1511 tokbuf, sizeof(tokbuf)),
1512 *(tptr+3),
1513 EXTRACT_16BITS(tptr+4));
1514 break;
1515 default:
1516 print_unknown_data(tptr,"\n\t ",8);
1517 break;
1518 }
1519 tlen -=8;
1520 tptr +=8;
1521 }
1522 break;
1523
1524 case BGPTYPE_ATTR_SET:
1525 TCHECK2(tptr[0], 4);
1526 printf("\n\t Origin AS: %u", EXTRACT_32BITS(tptr));
1527 tptr+=4;
1528 len -=4;
1529
1530 while (len >= 2 ) {
1531 int alen;
1532 struct bgp_attr bgpa;
1533
1534 TCHECK2(tptr[0], sizeof(bgpa));
1535 memcpy(&bgpa, tptr, sizeof(bgpa));
1536 alen = bgp_attr_len(&bgpa);
1537 tptr += bgp_attr_off(&bgpa);
1538 len -= bgp_attr_off(&bgpa);
1539
1540 printf("\n\t %s (%u), length: %u",
1541 tok2strbuf(bgp_attr_values,
1542 "Unknown Attribute", bgpa.bgpa_type,
1543 tokbuf, sizeof(tokbuf)),
1544 bgpa.bgpa_type,
1545 alen);
1546
1547 if (bgpa.bgpa_flags) {
1548 printf(", Flags [%s%s%s%s",
1549 bgpa.bgpa_flags & 0x80 ? "O" : "",
1550 bgpa.bgpa_flags & 0x40 ? "T" : "",
1551 bgpa.bgpa_flags & 0x20 ? "P" : "",
1552 bgpa.bgpa_flags & 0x10 ? "E" : "");
1553 if (bgpa.bgpa_flags & 0xf)
1554 printf("+%x", bgpa.bgpa_flags & 0xf);
1555 printf("]: ");
1556 }
1557 /* FIXME check for recursion */
1558 if (!bgp_attr_print(&bgpa, tptr, alen))
1559 return 0;
1560 tptr += alen;
1561 len -= alen;
1562 }
1563 break;
1564
1565
1566 default:
1567 TCHECK2(*pptr,len);
1568 printf("\n\t no Attribute %u decoder",attr->bgpa_type); /* we have no decoder for the attribute */
1569 if (vflag <= 1)
1570 print_unknown_data(pptr,"\n\t ",len);
1571 break;
1572 }
1573 if (vflag > 1 && len) /* omit zero length attributes*/
1574 print_unknown_data(pptr,"\n\t ",len);
1575 return 1;
1576
1577 trunc:
1578 return 0;
1579 }
1580
1581 static void
1582 bgp_open_print(const u_char *dat, int length)
1583 {
1584 struct bgp_open bgpo;
1585 struct bgp_opt bgpopt;
1586 int hlen;
1587 const u_char *opt;
1588 int i,cap_type,cap_len,tcap_len,cap_offset;
1589 char tokbuf[TOKBUFSIZE];
1590 char tokbuf2[TOKBUFSIZE];
1591
1592 TCHECK2(dat[0], BGP_OPEN_SIZE);
1593 memcpy(&bgpo, dat, BGP_OPEN_SIZE);
1594 hlen = ntohs(bgpo.bgpo_len);
1595
1596 printf("\n\t Version %d, ", bgpo.bgpo_version);
1597 printf("my AS %u, ", ntohs(bgpo.bgpo_myas));
1598 printf("Holdtime %us, ", ntohs(bgpo.bgpo_holdtime));
1599 printf("ID %s", getname((u_char *)&bgpo.bgpo_id));
1600 printf("\n\t Optional parameters, length: %u", bgpo.bgpo_optlen);
1601
1602 /* some little sanity checking */
1603 if (length < bgpo.bgpo_optlen+BGP_OPEN_SIZE)
1604 return;
1605
1606 /* ugly! */
1607 opt = &((const struct bgp_open *)dat)->bgpo_optlen;
1608 opt++;
1609
1610 i = 0;
1611 while (i < bgpo.bgpo_optlen) {
1612 TCHECK2(opt[i], BGP_OPT_SIZE);
1613 memcpy(&bgpopt, &opt[i], BGP_OPT_SIZE);
1614 if (i + 2 + bgpopt.bgpopt_len > bgpo.bgpo_optlen) {
1615 printf("\n\t Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len);
1616 break;
1617 }
1618
1619 printf("\n\t Option %s (%u), length: %u",
1620 tok2strbuf(bgp_opt_values,"Unknown",
1621 bgpopt.bgpopt_type,
1622 tokbuf, sizeof(tokbuf)),
1623 bgpopt.bgpopt_type,
1624 bgpopt.bgpopt_len);
1625
1626 /* now lets decode the options we know*/
1627 switch(bgpopt.bgpopt_type) {
1628 case BGP_OPT_CAP:
1629 cap_type=opt[i+BGP_OPT_SIZE];
1630 cap_len=opt[i+BGP_OPT_SIZE+1];
1631 tcap_len=cap_len;
1632 printf("\n\t %s (%u), length: %u",
1633 tok2strbuf(bgp_capcode_values, "Unknown",
1634 cap_type, tokbuf, sizeof(tokbuf)),
1635 cap_type,
1636 cap_len);
1637 switch(cap_type) {
1638 case BGP_CAPCODE_MP:
1639 printf("\n\t\tAFI %s (%u), SAFI %s (%u)",
1640 tok2strbuf(bgp_afi_values, "Unknown",
1641 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1642 tokbuf, sizeof(tokbuf)),
1643 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1644 tok2strbuf(bgp_safi_values, "Unknown",
1645 opt[i+BGP_OPT_SIZE+5],
1646 tokbuf, sizeof(tokbuf)),
1647 opt[i+BGP_OPT_SIZE+5]);
1648 break;
1649 case BGP_CAPCODE_RESTART:
1650 printf("\n\t\tRestart Flags: [%s], Restart Time %us",
1651 ((opt[i+BGP_OPT_SIZE+2])&0x80) ? "R" : "none",
1652 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2)&0xfff);
1653 tcap_len-=2;
1654 cap_offset=4;
1655 while(tcap_len>=4) {
1656 printf("\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s",
1657 tok2strbuf(bgp_afi_values,"Unknown",
1658 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1659 tokbuf, sizeof(tokbuf)),
1660 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1661 tok2strbuf(bgp_safi_values,"Unknown",
1662 opt[i+BGP_OPT_SIZE+cap_offset+2],
1663 tokbuf2, sizeof(tokbuf2)),
1664 opt[i+BGP_OPT_SIZE+cap_offset+2],
1665 ((opt[i+BGP_OPT_SIZE+cap_offset+3])&0x80) ? "yes" : "no" );
1666 tcap_len-=4;
1667 cap_offset+=4;
1668 }
1669 break;
1670 case BGP_CAPCODE_RR:
1671 case BGP_CAPCODE_RR_CISCO:
1672 break;
1673 default:
1674 printf("\n\t\tno decoder for Capability %u",
1675 cap_type);
1676 if (vflag <= 1)
1677 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
1678 break;
1679 }
1680 if (vflag > 1)
1681 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
1682 break;
1683 case BGP_OPT_AUTH:
1684 default:
1685 printf("\n\t no decoder for option %u",
1686 bgpopt.bgpopt_type);
1687 break;
1688 }
1689
1690 i += BGP_OPT_SIZE + bgpopt.bgpopt_len;
1691 }
1692 return;
1693 trunc:
1694 printf("[|BGP]");
1695 }
1696
1697 static void
1698 bgp_update_print(const u_char *dat, int length)
1699 {
1700 struct bgp bgp;
1701 struct bgp_attr bgpa;
1702 int hlen;
1703 const u_char *p;
1704 int len;
1705 int i;
1706 char tokbuf[TOKBUFSIZE];
1707
1708 TCHECK2(dat[0], BGP_SIZE);
1709 memcpy(&bgp, dat, BGP_SIZE);
1710 hlen = ntohs(bgp.bgp_len);
1711 p = dat + BGP_SIZE; /*XXX*/
1712
1713 /* Unfeasible routes */
1714 len = EXTRACT_16BITS(p);
1715 if (len) {
1716 /*
1717 * Without keeping state from the original NLRI message,
1718 * it's not possible to tell if this a v4 or v6 route,
1719 * so only try to decode it if we're not v6 enabled.
1720 */
1721 #ifdef INET6
1722 printf("\n\t Withdrawn routes: %d bytes", len);
1723 #else
1724 char buf[MAXHOSTNAMELEN + 100];
1725 int wpfx;
1726
1727 TCHECK2(p[2], len);
1728 i = 2;
1729
1730 printf("\n\t Withdrawn routes:");
1731
1732 while(i < 2 + len) {
1733 wpfx = decode_prefix4(&p[i], buf, sizeof(buf));
1734 if (wpfx == -1) {
1735 printf("\n\t (illegal prefix length)");
1736 break;
1737 } else if (wpfx == -2)
1738 goto trunc;
1739 else {
1740 i += wpfx;
1741 printf("\n\t %s", buf);
1742 }
1743 }
1744 #endif
1745 }
1746 p += 2 + len;
1747
1748 TCHECK2(p[0], 2);
1749 len = EXTRACT_16BITS(p);
1750
1751 if (len == 0 && length == BGP_UPDATE_MINSIZE) {
1752 printf("\n\t End-of-Rib Marker (empty NLRI)");
1753 return;
1754 }
1755
1756 if (len) {
1757 /* do something more useful!*/
1758 i = 2;
1759 while (i < 2 + len) {
1760 int alen, aoff;
1761
1762 TCHECK2(p[i], sizeof(bgpa));
1763 memcpy(&bgpa, &p[i], sizeof(bgpa));
1764 alen = bgp_attr_len(&bgpa);
1765 aoff = bgp_attr_off(&bgpa);
1766
1767 printf("\n\t %s (%u), length: %u",
1768 tok2strbuf(bgp_attr_values, "Unknown Attribute",
1769 bgpa.bgpa_type,
1770 tokbuf, sizeof(tokbuf)),
1771 bgpa.bgpa_type,
1772 alen);
1773
1774 if (bgpa.bgpa_flags) {
1775 printf(", Flags [%s%s%s%s",
1776 bgpa.bgpa_flags & 0x80 ? "O" : "",
1777 bgpa.bgpa_flags & 0x40 ? "T" : "",
1778 bgpa.bgpa_flags & 0x20 ? "P" : "",
1779 bgpa.bgpa_flags & 0x10 ? "E" : "");
1780 if (bgpa.bgpa_flags & 0xf)
1781 printf("+%x", bgpa.bgpa_flags & 0xf);
1782 printf("]: ");
1783 }
1784 if (!bgp_attr_print(&bgpa, &p[i + aoff], alen))
1785 goto trunc;
1786 i += aoff + alen;
1787 }
1788 }
1789 p += 2 + len;
1790
1791 if (dat + length > p) {
1792 printf("\n\t Updated routes:");
1793 while (dat + length > p) {
1794 char buf[MAXHOSTNAMELEN + 100];
1795 i = decode_prefix4(p, buf, sizeof(buf));
1796 if (i == -1)
1797 printf("\n\t (illegal prefix length)");
1798 else if (i == -2)
1799 goto trunc;
1800 else {
1801 printf("\n\t %s", buf);
1802 p += i;
1803 }
1804 }
1805 }
1806 return;
1807 trunc:
1808 printf("[|BGP]");
1809 }
1810
1811 static void
1812 bgp_notification_print(const u_char *dat, int length)
1813 {
1814 struct bgp_notification bgpn;
1815 int hlen;
1816 const u_char *tptr;
1817 char tokbuf[TOKBUFSIZE];
1818 char tokbuf2[TOKBUFSIZE];
1819
1820 TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
1821 memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
1822 hlen = ntohs(bgpn.bgpn_len);
1823
1824 /* some little sanity checking */
1825 if (length<BGP_NOTIFICATION_SIZE)
1826 return;
1827
1828 printf(", %s (%u)",
1829 tok2strbuf(bgp_notify_major_values, "Unknown Error",
1830 bgpn.bgpn_major, tokbuf, sizeof(tokbuf)),
1831 bgpn.bgpn_major);
1832
1833 switch (bgpn.bgpn_major) {
1834
1835 case BGP_NOTIFY_MAJOR_MSG:
1836 printf(", subcode %s (%u)",
1837 tok2strbuf(bgp_notify_minor_msg_values, "Unknown",
1838 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1839 bgpn.bgpn_minor);
1840 break;
1841 case BGP_NOTIFY_MAJOR_OPEN:
1842 printf(", subcode %s (%u)",
1843 tok2strbuf(bgp_notify_minor_open_values, "Unknown",
1844 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1845 bgpn.bgpn_minor);
1846 break;
1847 case BGP_NOTIFY_MAJOR_UPDATE:
1848 printf(", subcode %s (%u)",
1849 tok2strbuf(bgp_notify_minor_update_values, "Unknown",
1850 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1851 bgpn.bgpn_minor);
1852 break;
1853 case BGP_NOTIFY_MAJOR_CAP:
1854 printf(" subcode %s (%u)",
1855 tok2strbuf(bgp_notify_minor_cap_values, "Unknown",
1856 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1857 bgpn.bgpn_minor);
1858 case BGP_NOTIFY_MAJOR_CEASE:
1859 printf(", subcode %s (%u)",
1860 tok2strbuf(bgp_notify_minor_cease_values, "Unknown",
1861 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1862 bgpn.bgpn_minor);
1863
1864 /* draft-ietf-idr-cease-subcode-02 mentions optionally 7 bytes
1865 * for the maxprefix subtype, which may contain AFI, SAFI and MAXPREFIXES
1866 */
1867 if(bgpn.bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= BGP_NOTIFICATION_SIZE + 7) {
1868 tptr = dat + BGP_NOTIFICATION_SIZE;
1869 TCHECK2(*tptr, 7);
1870 printf(", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
1871 tok2strbuf(bgp_afi_values, "Unknown",
1872 EXTRACT_16BITS(tptr), tokbuf, sizeof(tokbuf)),
1873 EXTRACT_16BITS(tptr),
1874 tok2strbuf(bgp_safi_values, "Unknown", *(tptr+2),
1875 tokbuf2, sizeof(tokbuf)),
1876 *(tptr+2),
1877 EXTRACT_32BITS(tptr+3));
1878 }
1879 break;
1880 default:
1881 break;
1882 }
1883
1884 return;
1885 trunc:
1886 printf("[|BGP]");
1887 }
1888
1889 static void
1890 bgp_route_refresh_print(const u_char *pptr, int len) {
1891
1892 const struct bgp_route_refresh *bgp_route_refresh_header;
1893 char tokbuf[TOKBUFSIZE];
1894 char tokbuf2[TOKBUFSIZE];
1895
1896 bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
1897
1898 printf("\n\t AFI %s (%u), SAFI %s (%u)",
1899 tok2strbuf(bgp_afi_values,"Unknown",
1900 /* this stinks but the compiler pads the structure
1901 * weird */
1902 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
1903 tokbuf, sizeof(tokbuf)),
1904 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
1905 tok2strbuf(bgp_safi_values,"Unknown",
1906 bgp_route_refresh_header->safi,
1907 tokbuf2, sizeof(tokbuf2)),
1908 bgp_route_refresh_header->safi);
1909
1910 if (vflag > 1)
1911 print_unknown_data(pptr,"\n\t ", len);
1912
1913 return;
1914 }
1915
1916 static int
1917 bgp_header_print(const u_char *dat, int length)
1918 {
1919 struct bgp bgp;
1920 char tokbuf[TOKBUFSIZE];
1921
1922 TCHECK2(dat[0], BGP_SIZE);
1923 memcpy(&bgp, dat, BGP_SIZE);
1924 printf("\n\t%s Message (%u), length: %u",
1925 tok2strbuf(bgp_msg_values, "Unknown", bgp.bgp_type,
1926 tokbuf, sizeof(tokbuf)),
1927 bgp.bgp_type,
1928 length);
1929
1930 switch (bgp.bgp_type) {
1931 case BGP_OPEN:
1932 bgp_open_print(dat, length);
1933 break;
1934 case BGP_UPDATE:
1935 bgp_update_print(dat, length);
1936 break;
1937 case BGP_NOTIFICATION:
1938 bgp_notification_print(dat, length);
1939 break;
1940 case BGP_KEEPALIVE:
1941 break;
1942 case BGP_ROUTE_REFRESH:
1943 bgp_route_refresh_print(dat, length);
1944 break;
1945 default:
1946 /* we have no decoder for the BGP message */
1947 printf("\n\t no Message %u decoder",bgp.bgp_type);
1948 print_unknown_data(dat,"\n\t ",length);
1949 break;
1950 }
1951 return 1;
1952 trunc:
1953 printf("[|BGP]");
1954 return 0;
1955 }
1956
1957 void
1958 bgp_print(const u_char *dat, int length)
1959 {
1960 const u_char *p;
1961 const u_char *ep;
1962 const u_char *start;
1963 const u_char marker[] = {
1964 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1965 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1966 };
1967 struct bgp bgp;
1968 u_int16_t hlen;
1969 char tokbuf[TOKBUFSIZE];
1970
1971 ep = dat + length;
1972 if (snapend < dat + length)
1973 ep = snapend;
1974
1975 printf(": BGP, length: %u",length);
1976
1977 if (vflag < 1) /* lets be less chatty */
1978 return;
1979
1980 p = dat;
1981 start = p;
1982 while (p < snapend) {
1983 if (!TTEST2(p[0], 1))
1984 break;
1985 if (p[0] != 0xff) {
1986 p++;
1987 continue;
1988 }
1989
1990 if (!TTEST2(p[0], sizeof(marker)))
1991 break;
1992 if (memcmp(p, marker, sizeof(marker)) != 0) {
1993 p++;
1994 continue;
1995 }
1996
1997 /* found BGP header */
1998 TCHECK2(p[0], BGP_SIZE); /*XXX*/
1999 memcpy(&bgp, p, BGP_SIZE);
2000
2001 if (start != p)
2002 printf(" [|BGP]");
2003
2004 hlen = ntohs(bgp.bgp_len);
2005 if (hlen < BGP_SIZE) {
2006 printf("\n[|BGP Bogus header length %u < %u]", hlen,
2007 BGP_SIZE);
2008 break;
2009 }
2010
2011 if (TTEST2(p[0], hlen)) {
2012 if (!bgp_header_print(p, hlen))
2013 return;
2014 p += hlen;
2015 start = p;
2016 } else {
2017 printf("\n[|BGP %s]",
2018 tok2strbuf(bgp_msg_values,
2019 "Unknown Message Type",
2020 bgp.bgp_type,
2021 tokbuf, sizeof(tokbuf)));
2022 break;
2023 }
2024 }
2025
2026 return;
2027
2028 trunc:
2029 printf(" [|BGP]");
2030 }
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