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bugfix: we truncate the iso nsap strings by one byte, print next-hop length in the...
[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 1.97 2005-06-03 07:28:24 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_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
783 if (152 < plen)
784 return -1;
785
786 memset(&addr, 0, sizeof(addr));
787 TCHECK2(pptr[4], (plen + 7) / 8);
788 memcpy(&addr, &pptr[4], (plen + 7) / 8);
789 if (plen % 8) {
790 addr[(plen + 7) / 8 - 1] &=
791 ((0xff00 >> (plen % 8)) & 0xff);
792 }
793 snprintf(buf, buflen, "%s/%d",
794 isonsap_string(addr,(plen + 7) / 8),
795 plen);
796
797 return 1 + (plen + 7) / 8;
798
799 trunc:
800 return -2;
801 }
802
803 static int
804 decode_labeled_vpn_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
805 {
806 u_int8_t addr[19];
807 u_int plen;
808
809 TCHECK(pptr[0]);
810 plen = pptr[0]; /* get prefix length */
811
812 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
813
814 if (152 < plen)
815 return -1;
816
817 memset(&addr, 0, sizeof(addr));
818 TCHECK2(pptr[12], (plen + 7) / 8);
819 memcpy(&addr, &pptr[12], (plen + 7) / 8);
820 if (plen % 8) {
821 addr[(plen + 7) / 8 - 1] &=
822 ((0xff00 >> (plen % 8)) & 0xff);
823 }
824 /* the label may get offsetted by 4 bits so lets shift it right */
825 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
826 bgp_vpn_rd_print(pptr+4),
827 isonsap_string(addr,(plen + 7) / 8),
828 plen,
829 EXTRACT_24BITS(pptr+1)>>4,
830 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
831
832 return 12 + (plen + 7) / 8;
833
834 trunc:
835 return -2;
836 }
837
838 static int
839 bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len)
840 {
841 int i;
842 u_int16_t af;
843 u_int8_t safi, snpa, nhlen;
844 union { /* copy buffer for bandwidth values */
845 float f;
846 u_int32_t i;
847 } bw;
848 int advance;
849 int tlen;
850 const u_char *tptr;
851 char buf[MAXHOSTNAMELEN + 100];
852 char tokbuf[TOKBUFSIZE];
853
854 tptr = pptr;
855 tlen=len;
856
857 switch (attr->bgpa_type) {
858 case BGPTYPE_ORIGIN:
859 if (len != 1)
860 printf("invalid len");
861 else {
862 TCHECK(*tptr);
863 printf("%s", tok2strbuf(bgp_origin_values,
864 "Unknown Origin Typecode",
865 tptr[0],
866 tokbuf, sizeof(tokbuf)));
867 }
868 break;
869
870 case BGPTYPE_AS_PATH:
871 if (len % 2) {
872 printf("invalid len");
873 break;
874 }
875 if (!len) {
876 printf("empty");
877 break;
878 }
879
880 while (tptr < pptr + len) {
881 TCHECK(tptr[0]);
882 printf("%s", tok2strbuf(bgp_as_path_segment_open_values,
883 "?", tptr[0],
884 tokbuf, sizeof(tokbuf)));
885 for (i = 0; i < tptr[1] * 2; i += 2) {
886 TCHECK2(tptr[2 + i], 2);
887 printf("%u ", EXTRACT_16BITS(&tptr[2 + i]));
888 }
889 TCHECK(tptr[0]);
890 printf("%s", tok2strbuf(bgp_as_path_segment_close_values,
891 "?", tptr[0],
892 tokbuf, sizeof(tokbuf)));
893 TCHECK(tptr[1]);
894 tptr += 2 + tptr[1] * 2;
895 }
896 break;
897 case BGPTYPE_NEXT_HOP:
898 if (len != 4)
899 printf("invalid len");
900 else {
901 TCHECK2(tptr[0], 4);
902 printf("%s", getname(tptr));
903 }
904 break;
905 case BGPTYPE_MULTI_EXIT_DISC:
906 case BGPTYPE_LOCAL_PREF:
907 if (len != 4)
908 printf("invalid len");
909 else {
910 TCHECK2(tptr[0], 4);
911 printf("%u", EXTRACT_32BITS(tptr));
912 }
913 break;
914 case BGPTYPE_ATOMIC_AGGREGATE:
915 if (len != 0)
916 printf("invalid len");
917 break;
918 case BGPTYPE_AGGREGATOR:
919 if (len != 6) {
920 printf("invalid len");
921 break;
922 }
923 TCHECK2(tptr[0], 6);
924 printf(" AS #%u, origin %s", EXTRACT_16BITS(tptr),
925 getname(tptr + 2));
926 break;
927 case BGPTYPE_COMMUNITIES:
928 if (len % 4) {
929 printf("invalid len");
930 break;
931 }
932 while (tlen>0) {
933 u_int32_t comm;
934 TCHECK2(tptr[0], 4);
935 comm = EXTRACT_32BITS(tptr);
936 switch (comm) {
937 case BGP_COMMUNITY_NO_EXPORT:
938 printf(" NO_EXPORT");
939 break;
940 case BGP_COMMUNITY_NO_ADVERT:
941 printf(" NO_ADVERTISE");
942 break;
943 case BGP_COMMUNITY_NO_EXPORT_SUBCONFED:
944 printf(" NO_EXPORT_SUBCONFED");
945 break;
946 default:
947 printf("%u:%u%s",
948 (comm >> 16) & 0xffff,
949 comm & 0xffff,
950 (tlen>4) ? ", " : "");
951 break;
952 }
953 tlen -=4;
954 tptr +=4;
955 }
956 break;
957 case BGPTYPE_ORIGINATOR_ID:
958 if (len != 4) {
959 printf("invalid len");
960 break;
961 }
962 TCHECK2(tptr[0], 4);
963 printf("%s",getname(tptr));
964 break;
965 case BGPTYPE_CLUSTER_LIST:
966 if (len % 4) {
967 printf("invalid len");
968 break;
969 }
970 while (tlen>0) {
971 TCHECK2(tptr[0], 4);
972 printf("%s%s",
973 getname(tptr),
974 (tlen>4) ? ", " : "");
975 tlen -=4;
976 tptr +=4;
977 }
978 break;
979 case BGPTYPE_MP_REACH_NLRI:
980 TCHECK2(tptr[0], 3);
981 af = EXTRACT_16BITS(tptr);
982 safi = tptr[2];
983
984 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
985 tok2strbuf(bgp_afi_values, "Unknown AFI", af,
986 tokbuf, sizeof(tokbuf)),
987 af,
988 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
989 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
990 tokbuf, sizeof(tokbuf)),
991 safi);
992
993 switch(af<<8 | safi) {
994 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
995 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
996 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
997 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
998 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
999 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1000 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1001 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1002 #ifdef INET6
1003 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1004 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1005 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1006 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1007 case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1008 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1009 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1010 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1011 #endif
1012 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1013 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1014 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1015 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1016 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1017 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1018 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1019 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1020 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1021 break;
1022 default:
1023 TCHECK2(tptr[0], tlen);
1024 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1025 if (vflag <= 1)
1026 print_unknown_data(tptr,"\n\t ",tlen);
1027 goto done;
1028 break;
1029 }
1030
1031 tptr +=3;
1032
1033 TCHECK(tptr[0]);
1034 nhlen = tptr[0];
1035 tlen = nhlen;
1036 tptr++;
1037
1038 if (tlen) {
1039 printf("\n\t nexthop: ");
1040 while (tlen > 0) {
1041 switch(af<<8 | safi) {
1042 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1043 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1044 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1045 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1046 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1047 if (tlen < (int)sizeof(struct in_addr)) {
1048 printf("invalid len");
1049 tlen = 0;
1050 } else {
1051 TCHECK2(tptr[0], sizeof(struct in_addr));
1052 printf("%s",getname(tptr));
1053 tlen -= sizeof(struct in_addr);
1054 tptr += sizeof(struct in_addr);
1055 }
1056 break;
1057 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1058 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1059 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1060 if (tlen < (int)(sizeof(struct in_addr)+BGP_VPN_RD_LEN)) {
1061 printf("invalid len");
1062 tlen = 0;
1063 } else {
1064 TCHECK2(tptr[0], sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1065 printf("RD: %s, %s",
1066 bgp_vpn_rd_print(tptr),
1067 getname(tptr+BGP_VPN_RD_LEN));
1068 tlen -= (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1069 tptr += (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1070 }
1071 break;
1072 #ifdef INET6
1073 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1074 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1075 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1076 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1077 case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1078 if (tlen < (int)sizeof(struct in6_addr)) {
1079 printf("invalid len");
1080 tlen = 0;
1081 } else {
1082 TCHECK2(tptr[0], sizeof(struct in6_addr));
1083 printf("%s", getname6(tptr));
1084 tlen -= sizeof(struct in6_addr);
1085 tptr += sizeof(struct in6_addr);
1086 }
1087 break;
1088 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1089 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1090 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1091 if (tlen < (int)(sizeof(struct in6_addr)+BGP_VPN_RD_LEN)) {
1092 printf("invalid len");
1093 tlen = 0;
1094 } else {
1095 TCHECK2(tptr[0], sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1096 printf("RD: %s, %s",
1097 bgp_vpn_rd_print(tptr),
1098 getname6(tptr+BGP_VPN_RD_LEN));
1099 tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1100 tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1101 }
1102 break;
1103 #endif
1104 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1105 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1106 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1107 if (tlen < (int)sizeof(struct in_addr)) {
1108 printf("invalid len");
1109 tlen = 0;
1110 } else {
1111 TCHECK2(tptr[0], sizeof(struct in_addr));
1112 printf("%s", getname(tptr));
1113 tlen -= (sizeof(struct in_addr));
1114 tptr += (sizeof(struct in_addr));
1115 }
1116 break;
1117 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1118 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1119 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1120 TCHECK2(tptr[0], tlen);
1121 printf("%s",isonsap_string(tptr,tlen));
1122 tptr += tlen;
1123 tlen = 0;
1124 break;
1125
1126 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1127 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1128 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1129 if (tlen < BGP_VPN_RD_LEN+1) {
1130 printf("invalid len");
1131 tlen = 0;
1132 } else {
1133 TCHECK2(tptr[0], tlen);
1134 printf("RD: %s, %s",
1135 bgp_vpn_rd_print(tptr),
1136 isonsap_string(tptr+BGP_VPN_RD_LEN,tlen-BGP_VPN_RD_LEN));
1137 /* rfc986 mapped IPv4 address ? */
1138 if (EXTRACT_32BITS(tptr+BGP_VPN_RD_LEN) == 0x47000601)
1139 printf(" = %s", getname(tptr+BGP_VPN_RD_LEN+4));
1140 #ifdef INET6
1141 /* rfc1888 mapped IPv6 address ? */
1142 else if (EXTRACT_24BITS(tptr+BGP_VPN_RD_LEN) == 0x350000)
1143 printf(" = %s", getname6(tptr+BGP_VPN_RD_LEN+3));
1144 #endif
1145 tptr += tlen;
1146 tlen = 0;
1147 }
1148 break;
1149 default:
1150 TCHECK2(tptr[0], tlen);
1151 printf("no AFI %u/SAFI %u decoder",af,safi);
1152 if (vflag <= 1)
1153 print_unknown_data(tptr,"\n\t ",tlen);
1154 tptr += tlen;
1155 tlen = 0;
1156 goto done;
1157 break;
1158 }
1159 }
1160 }
1161 printf(", nh-length: %u", nhlen);
1162 tptr += tlen;
1163
1164 TCHECK(tptr[0]);
1165 snpa = tptr[0];
1166 tptr++;
1167
1168 if (snpa) {
1169 printf("\n\t %u SNPA", snpa);
1170 for (/*nothing*/; snpa > 0; snpa--) {
1171 TCHECK(tptr[0]);
1172 printf("\n\t %d bytes", tptr[0]);
1173 tptr += tptr[0] + 1;
1174 }
1175 } else {
1176 printf(", no SNPA");
1177 }
1178
1179 while (len - (tptr - pptr) > 0) {
1180 switch (af<<8 | safi) {
1181 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1182 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1183 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1184 advance = decode_prefix4(tptr, buf, sizeof(buf));
1185 if (advance == -1)
1186 printf("\n\t (illegal prefix length)");
1187 else if (advance == -2)
1188 goto trunc;
1189 else
1190 printf("\n\t %s", buf);
1191 break;
1192 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1193 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1194 if (advance == -1)
1195 printf("\n\t (illegal prefix length)");
1196 else if (advance == -2)
1197 goto trunc;
1198 else
1199 printf("\n\t %s", buf);
1200 break;
1201 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1202 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1203 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1204 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1205 if (advance == -1)
1206 printf("\n\t (illegal prefix length)");
1207 else if (advance == -2)
1208 goto trunc;
1209 else
1210 printf("\n\t %s", buf);
1211 break;
1212 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1213 advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1214 if (advance == -1)
1215 printf("\n\t (illegal prefix length)");
1216 else if (advance == -2)
1217 goto trunc;
1218 else
1219 printf("\n\t %s", buf);
1220 break;
1221 #ifdef INET6
1222 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1223 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1224 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1225 advance = decode_prefix6(tptr, buf, sizeof(buf));
1226 if (advance == -1)
1227 printf("\n\t (illegal prefix length)");
1228 else if (advance == -2)
1229 goto trunc;
1230 else
1231 printf("\n\t %s", buf);
1232 break;
1233 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1234 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1235 if (advance == -1)
1236 printf("\n\t (illegal prefix length)");
1237 else if (advance == -2)
1238 goto trunc;
1239 else
1240 printf("\n\t %s", buf);
1241 break;
1242 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1243 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1244 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1245 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1246 if (advance == -1)
1247 printf("\n\t (illegal prefix length)");
1248 else if (advance == -2)
1249 goto trunc;
1250 else
1251 printf("\n\t %s", buf);
1252 break;
1253 case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1254 advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1255 if (advance == -1)
1256 printf("\n\t (illegal prefix length)");
1257 else if (advance == -2)
1258 goto trunc;
1259 else
1260 printf("\n\t %s", buf);
1261 break;
1262 #endif
1263 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1264 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1265 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1266 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1267 if (advance == -1)
1268 printf("\n\t (illegal length)");
1269 else if (advance == -2)
1270 goto trunc;
1271 else
1272 printf("\n\t %s", buf);
1273 break;
1274 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1275 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1276 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1277 advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1278 if (advance == -1)
1279 printf("\n\t (illegal prefix length)");
1280 else if (advance == -2)
1281 goto trunc;
1282 else
1283 printf("\n\t %s", buf);
1284 break;
1285 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1286 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1287 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1288 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1289 if (advance == -1)
1290 printf("\n\t (illegal prefix length)");
1291 else if (advance == -2)
1292 goto trunc;
1293 else
1294 printf("\n\t %s", buf);
1295 break;
1296 default:
1297 TCHECK2(*tptr,tlen);
1298 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1299 if (vflag <= 1)
1300 print_unknown_data(tptr,"\n\t ",tlen);
1301 advance = 0;
1302 tptr = pptr + len;
1303 break;
1304 }
1305 if (advance < 0)
1306 break;
1307 tptr += advance;
1308 }
1309 done:
1310 break;
1311
1312 case BGPTYPE_MP_UNREACH_NLRI:
1313 TCHECK2(tptr[0], BGP_MP_NLRI_MINSIZE);
1314 af = EXTRACT_16BITS(tptr);
1315 safi = tptr[2];
1316
1317 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1318 tok2strbuf(bgp_afi_values, "Unknown AFI", af,
1319 tokbuf, sizeof(tokbuf)),
1320 af,
1321 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1322 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1323 tokbuf, sizeof(tokbuf)),
1324 safi);
1325
1326 if (len == BGP_MP_NLRI_MINSIZE)
1327 printf("\n\t End-of-Rib Marker (empty NLRI)");
1328
1329 tptr += 3;
1330
1331 while (len - (tptr - pptr) > 0) {
1332 switch (af<<8 | safi) {
1333 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1334 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1335 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1336 advance = decode_prefix4(tptr, buf, sizeof(buf));
1337 if (advance == -1)
1338 printf("\n\t (illegal prefix length)");
1339 else if (advance == -2)
1340 goto trunc;
1341 else
1342 printf("\n\t %s", buf);
1343 break;
1344 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1345 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1346 if (advance == -1)
1347 printf("\n\t (illegal prefix length)");
1348 else if (advance == -2)
1349 goto trunc;
1350 else
1351 printf("\n\t %s", buf);
1352 break;
1353 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1354 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1355 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1356 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1357 if (advance == -1)
1358 printf("\n\t (illegal prefix length)");
1359 else if (advance == -2)
1360 goto trunc;
1361 else
1362 printf("\n\t %s", buf);
1363 break;
1364 #ifdef INET6
1365 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1366 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1367 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1368 advance = decode_prefix6(tptr, buf, sizeof(buf));
1369 if (advance == -1)
1370 printf("\n\t (illegal prefix length)");
1371 else if (advance == -2)
1372 goto trunc;
1373 else
1374 printf("\n\t %s", buf);
1375 break;
1376 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1377 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1378 if (advance == -1)
1379 printf("\n\t (illegal prefix length)");
1380 else if (advance == -2)
1381 goto trunc;
1382 else
1383 printf("\n\t %s", buf);
1384 break;
1385 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1386 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1387 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1388 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1389 if (advance == -1)
1390 printf("\n\t (illegal prefix length)");
1391 else if (advance == -2)
1392 goto trunc;
1393 else
1394 printf("\n\t %s", buf);
1395 break;
1396 #endif
1397 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1398 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1399 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1400 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1401 if (advance == -1)
1402 printf("\n\t (illegal length)");
1403 else if (advance == -2)
1404 goto trunc;
1405 else
1406 printf("\n\t %s", buf);
1407 break;
1408 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1409 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1410 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1411 advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1412 if (advance == -1)
1413 printf("\n\t (illegal prefix length)");
1414 else if (advance == -2)
1415 goto trunc;
1416 else
1417 printf("\n\t %s", buf);
1418 break;
1419 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1420 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1421 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1422 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1423 if (advance == -1)
1424 printf("\n\t (illegal prefix length)");
1425 else if (advance == -2)
1426 goto trunc;
1427 else
1428 printf("\n\t %s", buf);
1429 break;
1430 default:
1431 TCHECK2(*(tptr-3),tlen);
1432 printf("no AFI %u / SAFI %u decoder",af,safi);
1433 if (vflag <= 1)
1434 print_unknown_data(tptr-3,"\n\t ",tlen);
1435 advance = 0;
1436 tptr = pptr + len;
1437 break;
1438 }
1439 if (advance < 0)
1440 break;
1441 tptr += advance;
1442 }
1443 break;
1444 case BGPTYPE_EXTD_COMMUNITIES:
1445 if (len % 8) {
1446 printf("invalid len");
1447 break;
1448 }
1449 while (tlen>0) {
1450 u_int16_t extd_comm;
1451
1452 TCHECK2(tptr[0], 2);
1453 extd_comm=EXTRACT_16BITS(tptr);
1454
1455 printf("\n\t %s (0x%04x), Flags [%s]",
1456 tok2strbuf(bgp_extd_comm_subtype_values,
1457 "unknown extd community typecode",
1458 extd_comm, tokbuf, sizeof(tokbuf)),
1459 extd_comm,
1460 bittok2str(bgp_extd_comm_flag_values, "none", extd_comm));
1461
1462 TCHECK2(*(tptr+2), 6);
1463 switch(extd_comm) {
1464 case BGP_EXT_COM_RT_0:
1465 case BGP_EXT_COM_RO_0:
1466 printf(": %u:%s",
1467 EXTRACT_16BITS(tptr+2),
1468 getname(tptr+4));
1469 break;
1470 case BGP_EXT_COM_RT_1:
1471 case BGP_EXT_COM_RO_1:
1472 printf(": %s:%u",
1473 getname(tptr+2),
1474 EXTRACT_16BITS(tptr+6));
1475 break;
1476 case BGP_EXT_COM_RT_2:
1477 case BGP_EXT_COM_RO_2:
1478 printf(": %u:%u",
1479 EXTRACT_32BITS(tptr+2),
1480 EXTRACT_16BITS(tptr+6));
1481 break;
1482 case BGP_EXT_COM_LINKBAND:
1483 bw.i = EXTRACT_32BITS(tptr+2);
1484 printf(": bandwidth: %.3f Mbps",
1485 bw.f*8/1000000);
1486 break;
1487 case BGP_EXT_COM_CISCO_MCAST:
1488 printf(": AS %u, group %s",
1489 EXTRACT_16BITS(tptr+2),
1490 getname(tptr+4));
1491 break;
1492 case BGP_EXT_COM_VPN_ORIGIN:
1493 case BGP_EXT_COM_VPN_ORIGIN2:
1494 case BGP_EXT_COM_VPN_ORIGIN3:
1495 case BGP_EXT_COM_VPN_ORIGIN4:
1496 case BGP_EXT_COM_OSPF_RID:
1497 case BGP_EXT_COM_OSPF_RID2:
1498 printf("%s", getname(tptr+2));
1499 break;
1500 case BGP_EXT_COM_OSPF_RTYPE:
1501 case BGP_EXT_COM_OSPF_RTYPE2:
1502 printf(": area:%s, router-type:%s, metric-type:%s%s",
1503 getname(tptr+2),
1504 tok2strbuf(bgp_extd_comm_ospf_rtype_values,
1505 "unknown (0x%02x)",
1506 *(tptr+6),
1507 tokbuf, sizeof(tokbuf)),
1508 (*(tptr+7) & BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "",
1509 (*(tptr+6) == (BGP_OSPF_RTYPE_EXT ||BGP_OSPF_RTYPE_NSSA )) ? "E1" : "");
1510 break;
1511 case BGP_EXT_COM_L2INFO:
1512 printf(": %s Control Flags [0x%02x]:MTU %u",
1513 tok2strbuf(l2vpn_encaps_values,
1514 "unknown encaps",
1515 *(tptr+2),
1516 tokbuf, sizeof(tokbuf)),
1517 *(tptr+3),
1518 EXTRACT_16BITS(tptr+4));
1519 break;
1520 default:
1521 TCHECK2(*tptr,8);
1522 print_unknown_data(tptr,"\n\t ",8);
1523 break;
1524 }
1525 tlen -=8;
1526 tptr +=8;
1527 }
1528 break;
1529
1530 case BGPTYPE_ATTR_SET:
1531 TCHECK2(tptr[0], 4);
1532 printf("\n\t Origin AS: %u", EXTRACT_32BITS(tptr));
1533 tptr+=4;
1534 len -=4;
1535
1536 while (len >= 2 ) {
1537 int alen;
1538 struct bgp_attr bgpa;
1539
1540 TCHECK2(tptr[0], sizeof(bgpa));
1541 memcpy(&bgpa, tptr, sizeof(bgpa));
1542 alen = bgp_attr_len(&bgpa);
1543 tptr += bgp_attr_off(&bgpa);
1544 len -= bgp_attr_off(&bgpa);
1545
1546 printf("\n\t %s (%u), length: %u",
1547 tok2strbuf(bgp_attr_values,
1548 "Unknown Attribute", bgpa.bgpa_type,
1549 tokbuf, sizeof(tokbuf)),
1550 bgpa.bgpa_type,
1551 alen);
1552
1553 if (bgpa.bgpa_flags) {
1554 printf(", Flags [%s%s%s%s",
1555 bgpa.bgpa_flags & 0x80 ? "O" : "",
1556 bgpa.bgpa_flags & 0x40 ? "T" : "",
1557 bgpa.bgpa_flags & 0x20 ? "P" : "",
1558 bgpa.bgpa_flags & 0x10 ? "E" : "");
1559 if (bgpa.bgpa_flags & 0xf)
1560 printf("+%x", bgpa.bgpa_flags & 0xf);
1561 printf("]: ");
1562 }
1563 /* FIXME check for recursion */
1564 if (!bgp_attr_print(&bgpa, tptr, alen))
1565 return 0;
1566 tptr += alen;
1567 len -= alen;
1568 }
1569 break;
1570
1571
1572 default:
1573 TCHECK2(*pptr,len);
1574 printf("\n\t no Attribute %u decoder",attr->bgpa_type); /* we have no decoder for the attribute */
1575 if (vflag <= 1)
1576 print_unknown_data(pptr,"\n\t ",len);
1577 break;
1578 }
1579 if (vflag > 1 && len) { /* omit zero length attributes*/
1580 TCHECK2(*pptr,len);
1581 print_unknown_data(pptr,"\n\t ",len);
1582 }
1583 return 1;
1584
1585 trunc:
1586 return 0;
1587 }
1588
1589 static void
1590 bgp_open_print(const u_char *dat, int length)
1591 {
1592 struct bgp_open bgpo;
1593 struct bgp_opt bgpopt;
1594 const u_char *opt;
1595 int i,cap_type,cap_len,tcap_len,cap_offset;
1596 char tokbuf[TOKBUFSIZE];
1597 char tokbuf2[TOKBUFSIZE];
1598
1599 TCHECK2(dat[0], BGP_OPEN_SIZE);
1600 memcpy(&bgpo, dat, BGP_OPEN_SIZE);
1601
1602 printf("\n\t Version %d, ", bgpo.bgpo_version);
1603 printf("my AS %u, ", ntohs(bgpo.bgpo_myas));
1604 printf("Holdtime %us, ", ntohs(bgpo.bgpo_holdtime));
1605 printf("ID %s", getname((u_char *)&bgpo.bgpo_id));
1606 printf("\n\t Optional parameters, length: %u", bgpo.bgpo_optlen);
1607
1608 /* some little sanity checking */
1609 if (length < bgpo.bgpo_optlen+BGP_OPEN_SIZE)
1610 return;
1611
1612 /* ugly! */
1613 opt = &((const struct bgp_open *)dat)->bgpo_optlen;
1614 opt++;
1615
1616 i = 0;
1617 while (i < bgpo.bgpo_optlen) {
1618 TCHECK2(opt[i], BGP_OPT_SIZE);
1619 memcpy(&bgpopt, &opt[i], BGP_OPT_SIZE);
1620 if (i + 2 + bgpopt.bgpopt_len > bgpo.bgpo_optlen) {
1621 printf("\n\t Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len);
1622 break;
1623 }
1624
1625 printf("\n\t Option %s (%u), length: %u",
1626 tok2strbuf(bgp_opt_values,"Unknown",
1627 bgpopt.bgpopt_type,
1628 tokbuf, sizeof(tokbuf)),
1629 bgpopt.bgpopt_type,
1630 bgpopt.bgpopt_len);
1631
1632 /* now lets decode the options we know*/
1633 switch(bgpopt.bgpopt_type) {
1634 case BGP_OPT_CAP:
1635 cap_type=opt[i+BGP_OPT_SIZE];
1636 cap_len=opt[i+BGP_OPT_SIZE+1];
1637 tcap_len=cap_len;
1638 printf("\n\t %s (%u), length: %u",
1639 tok2strbuf(bgp_capcode_values, "Unknown",
1640 cap_type, tokbuf, sizeof(tokbuf)),
1641 cap_type,
1642 cap_len);
1643 switch(cap_type) {
1644 case BGP_CAPCODE_MP:
1645 printf("\n\t\tAFI %s (%u), SAFI %s (%u)",
1646 tok2strbuf(bgp_afi_values, "Unknown",
1647 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1648 tokbuf, sizeof(tokbuf)),
1649 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1650 tok2strbuf(bgp_safi_values, "Unknown",
1651 opt[i+BGP_OPT_SIZE+5],
1652 tokbuf, sizeof(tokbuf)),
1653 opt[i+BGP_OPT_SIZE+5]);
1654 break;
1655 case BGP_CAPCODE_RESTART:
1656 printf("\n\t\tRestart Flags: [%s], Restart Time %us",
1657 ((opt[i+BGP_OPT_SIZE+2])&0x80) ? "R" : "none",
1658 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2)&0xfff);
1659 tcap_len-=2;
1660 cap_offset=4;
1661 while(tcap_len>=4) {
1662 printf("\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s",
1663 tok2strbuf(bgp_afi_values,"Unknown",
1664 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1665 tokbuf, sizeof(tokbuf)),
1666 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1667 tok2strbuf(bgp_safi_values,"Unknown",
1668 opt[i+BGP_OPT_SIZE+cap_offset+2],
1669 tokbuf2, sizeof(tokbuf2)),
1670 opt[i+BGP_OPT_SIZE+cap_offset+2],
1671 ((opt[i+BGP_OPT_SIZE+cap_offset+3])&0x80) ? "yes" : "no" );
1672 tcap_len-=4;
1673 cap_offset+=4;
1674 }
1675 break;
1676 case BGP_CAPCODE_RR:
1677 case BGP_CAPCODE_RR_CISCO:
1678 break;
1679 default:
1680 TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
1681 printf("\n\t\tno decoder for Capability %u",
1682 cap_type);
1683 if (vflag <= 1)
1684 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
1685 break;
1686 }
1687 if (vflag > 1) {
1688 TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
1689 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
1690 }
1691 break;
1692 case BGP_OPT_AUTH:
1693 default:
1694 printf("\n\t no decoder for option %u",
1695 bgpopt.bgpopt_type);
1696 break;
1697 }
1698
1699 i += BGP_OPT_SIZE + bgpopt.bgpopt_len;
1700 }
1701 return;
1702 trunc:
1703 printf("[|BGP]");
1704 }
1705
1706 static void
1707 bgp_update_print(const u_char *dat, int length)
1708 {
1709 struct bgp bgp;
1710 struct bgp_attr bgpa;
1711 const u_char *p;
1712 int len;
1713 int i;
1714 char tokbuf[TOKBUFSIZE];
1715
1716 TCHECK2(dat[0], BGP_SIZE);
1717 memcpy(&bgp, dat, BGP_SIZE);
1718 p = dat + BGP_SIZE; /*XXX*/
1719
1720 /* Unfeasible routes */
1721 len = EXTRACT_16BITS(p);
1722 if (len) {
1723 /*
1724 * Without keeping state from the original NLRI message,
1725 * it's not possible to tell if this a v4 or v6 route,
1726 * so only try to decode it if we're not v6 enabled.
1727 */
1728 #ifdef INET6
1729 printf("\n\t Withdrawn routes: %d bytes", len);
1730 #else
1731 char buf[MAXHOSTNAMELEN + 100];
1732 int wpfx;
1733
1734 TCHECK2(p[2], len);
1735 i = 2;
1736
1737 printf("\n\t Withdrawn routes:");
1738
1739 while(i < 2 + len) {
1740 wpfx = decode_prefix4(&p[i], buf, sizeof(buf));
1741 if (wpfx == -1) {
1742 printf("\n\t (illegal prefix length)");
1743 break;
1744 } else if (wpfx == -2)
1745 goto trunc;
1746 else {
1747 i += wpfx;
1748 printf("\n\t %s", buf);
1749 }
1750 }
1751 #endif
1752 }
1753 p += 2 + len;
1754
1755 TCHECK2(p[0], 2);
1756 len = EXTRACT_16BITS(p);
1757
1758 if (len == 0 && length == BGP_UPDATE_MINSIZE) {
1759 printf("\n\t End-of-Rib Marker (empty NLRI)");
1760 return;
1761 }
1762
1763 if (len) {
1764 /* do something more useful!*/
1765 i = 2;
1766 while (i < 2 + len) {
1767 int alen, aoff;
1768
1769 TCHECK2(p[i], sizeof(bgpa));
1770 memcpy(&bgpa, &p[i], sizeof(bgpa));
1771 alen = bgp_attr_len(&bgpa);
1772 aoff = bgp_attr_off(&bgpa);
1773
1774 printf("\n\t %s (%u), length: %u",
1775 tok2strbuf(bgp_attr_values, "Unknown Attribute",
1776 bgpa.bgpa_type,
1777 tokbuf, sizeof(tokbuf)),
1778 bgpa.bgpa_type,
1779 alen);
1780
1781 if (bgpa.bgpa_flags) {
1782 printf(", Flags [%s%s%s%s",
1783 bgpa.bgpa_flags & 0x80 ? "O" : "",
1784 bgpa.bgpa_flags & 0x40 ? "T" : "",
1785 bgpa.bgpa_flags & 0x20 ? "P" : "",
1786 bgpa.bgpa_flags & 0x10 ? "E" : "");
1787 if (bgpa.bgpa_flags & 0xf)
1788 printf("+%x", bgpa.bgpa_flags & 0xf);
1789 printf("]: ");
1790 }
1791 if (!bgp_attr_print(&bgpa, &p[i + aoff], alen))
1792 goto trunc;
1793 i += aoff + alen;
1794 }
1795 }
1796 p += 2 + len;
1797
1798 if (dat + length > p) {
1799 printf("\n\t Updated routes:");
1800 while (dat + length > p) {
1801 char buf[MAXHOSTNAMELEN + 100];
1802 i = decode_prefix4(p, buf, sizeof(buf));
1803 if (i == -1) {
1804 printf("\n\t (illegal prefix length)");
1805 break;
1806 } else if (i == -2)
1807 goto trunc;
1808 else {
1809 printf("\n\t %s", buf);
1810 p += i;
1811 }
1812 }
1813 }
1814 return;
1815 trunc:
1816 printf("[|BGP]");
1817 }
1818
1819 static void
1820 bgp_notification_print(const u_char *dat, int length)
1821 {
1822 struct bgp_notification bgpn;
1823 const u_char *tptr;
1824 char tokbuf[TOKBUFSIZE];
1825 char tokbuf2[TOKBUFSIZE];
1826
1827 TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
1828 memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
1829
1830 /* some little sanity checking */
1831 if (length<BGP_NOTIFICATION_SIZE)
1832 return;
1833
1834 printf(", %s (%u)",
1835 tok2strbuf(bgp_notify_major_values, "Unknown Error",
1836 bgpn.bgpn_major, tokbuf, sizeof(tokbuf)),
1837 bgpn.bgpn_major);
1838
1839 switch (bgpn.bgpn_major) {
1840
1841 case BGP_NOTIFY_MAJOR_MSG:
1842 printf(", subcode %s (%u)",
1843 tok2strbuf(bgp_notify_minor_msg_values, "Unknown",
1844 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1845 bgpn.bgpn_minor);
1846 break;
1847 case BGP_NOTIFY_MAJOR_OPEN:
1848 printf(", subcode %s (%u)",
1849 tok2strbuf(bgp_notify_minor_open_values, "Unknown",
1850 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1851 bgpn.bgpn_minor);
1852 break;
1853 case BGP_NOTIFY_MAJOR_UPDATE:
1854 printf(", subcode %s (%u)",
1855 tok2strbuf(bgp_notify_minor_update_values, "Unknown",
1856 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1857 bgpn.bgpn_minor);
1858 break;
1859 case BGP_NOTIFY_MAJOR_CAP:
1860 printf(" subcode %s (%u)",
1861 tok2strbuf(bgp_notify_minor_cap_values, "Unknown",
1862 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1863 bgpn.bgpn_minor);
1864 case BGP_NOTIFY_MAJOR_CEASE:
1865 printf(", subcode %s (%u)",
1866 tok2strbuf(bgp_notify_minor_cease_values, "Unknown",
1867 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1868 bgpn.bgpn_minor);
1869
1870 /* draft-ietf-idr-cease-subcode-02 mentions optionally 7 bytes
1871 * for the maxprefix subtype, which may contain AFI, SAFI and MAXPREFIXES
1872 */
1873 if(bgpn.bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= BGP_NOTIFICATION_SIZE + 7) {
1874 tptr = dat + BGP_NOTIFICATION_SIZE;
1875 TCHECK2(*tptr, 7);
1876 printf(", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
1877 tok2strbuf(bgp_afi_values, "Unknown",
1878 EXTRACT_16BITS(tptr), tokbuf, sizeof(tokbuf)),
1879 EXTRACT_16BITS(tptr),
1880 tok2strbuf(bgp_safi_values, "Unknown", *(tptr+2),
1881 tokbuf2, sizeof(tokbuf)),
1882 *(tptr+2),
1883 EXTRACT_32BITS(tptr+3));
1884 }
1885 break;
1886 default:
1887 break;
1888 }
1889
1890 return;
1891 trunc:
1892 printf("[|BGP]");
1893 }
1894
1895 static void
1896 bgp_route_refresh_print(const u_char *pptr, int len) {
1897
1898 const struct bgp_route_refresh *bgp_route_refresh_header;
1899 char tokbuf[TOKBUFSIZE];
1900 char tokbuf2[TOKBUFSIZE];
1901
1902 TCHECK2(pptr[0], BGP_ROUTE_REFRESH_SIZE);
1903
1904 /* some little sanity checking */
1905 if (len<BGP_ROUTE_REFRESH_SIZE)
1906 return;
1907
1908 bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
1909
1910 printf("\n\t AFI %s (%u), SAFI %s (%u)",
1911 tok2strbuf(bgp_afi_values,"Unknown",
1912 /* this stinks but the compiler pads the structure
1913 * weird */
1914 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
1915 tokbuf, sizeof(tokbuf)),
1916 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
1917 tok2strbuf(bgp_safi_values,"Unknown",
1918 bgp_route_refresh_header->safi,
1919 tokbuf2, sizeof(tokbuf2)),
1920 bgp_route_refresh_header->safi);
1921
1922 if (vflag > 1) {
1923 TCHECK2(*pptr, len);
1924 print_unknown_data(pptr,"\n\t ", len);
1925 }
1926
1927 return;
1928 trunc:
1929 printf("[|BGP]");
1930 }
1931
1932 static int
1933 bgp_header_print(const u_char *dat, int length)
1934 {
1935 struct bgp bgp;
1936 char tokbuf[TOKBUFSIZE];
1937
1938 TCHECK2(dat[0], BGP_SIZE);
1939 memcpy(&bgp, dat, BGP_SIZE);
1940 printf("\n\t%s Message (%u), length: %u",
1941 tok2strbuf(bgp_msg_values, "Unknown", bgp.bgp_type,
1942 tokbuf, sizeof(tokbuf)),
1943 bgp.bgp_type,
1944 length);
1945
1946 switch (bgp.bgp_type) {
1947 case BGP_OPEN:
1948 bgp_open_print(dat, length);
1949 break;
1950 case BGP_UPDATE:
1951 bgp_update_print(dat, length);
1952 break;
1953 case BGP_NOTIFICATION:
1954 bgp_notification_print(dat, length);
1955 break;
1956 case BGP_KEEPALIVE:
1957 break;
1958 case BGP_ROUTE_REFRESH:
1959 bgp_route_refresh_print(dat, length);
1960 break;
1961 default:
1962 /* we have no decoder for the BGP message */
1963 TCHECK2(*dat, length);
1964 printf("\n\t no Message %u decoder",bgp.bgp_type);
1965 print_unknown_data(dat,"\n\t ",length);
1966 break;
1967 }
1968 return 1;
1969 trunc:
1970 printf("[|BGP]");
1971 return 0;
1972 }
1973
1974 void
1975 bgp_print(const u_char *dat, int length)
1976 {
1977 const u_char *p;
1978 const u_char *ep;
1979 const u_char *start;
1980 const u_char marker[] = {
1981 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1982 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1983 };
1984 struct bgp bgp;
1985 u_int16_t hlen;
1986 char tokbuf[TOKBUFSIZE];
1987
1988 ep = dat + length;
1989 if (snapend < dat + length)
1990 ep = snapend;
1991
1992 printf(": BGP, length: %u",length);
1993
1994 if (vflag < 1) /* lets be less chatty */
1995 return;
1996
1997 p = dat;
1998 start = p;
1999 while (p < ep) {
2000 if (!TTEST2(p[0], 1))
2001 break;
2002 if (p[0] != 0xff) {
2003 p++;
2004 continue;
2005 }
2006
2007 if (!TTEST2(p[0], sizeof(marker)))
2008 break;
2009 if (memcmp(p, marker, sizeof(marker)) != 0) {
2010 p++;
2011 continue;
2012 }
2013
2014 /* found BGP header */
2015 TCHECK2(p[0], BGP_SIZE); /*XXX*/
2016 memcpy(&bgp, p, BGP_SIZE);
2017
2018 if (start != p)
2019 printf(" [|BGP]");
2020
2021 hlen = ntohs(bgp.bgp_len);
2022 if (hlen < BGP_SIZE) {
2023 printf("\n[|BGP Bogus header length %u < %u]", hlen,
2024 BGP_SIZE);
2025 break;
2026 }
2027
2028 if (TTEST2(p[0], hlen)) {
2029 if (!bgp_header_print(p, hlen))
2030 return;
2031 p += hlen;
2032 start = p;
2033 } else {
2034 printf("\n[|BGP %s]",
2035 tok2strbuf(bgp_msg_values,
2036 "Unknown Message Type",
2037 bgp.bgp_type,
2038 tokbuf, sizeof(tokbuf)));
2039 break;
2040 }
2041 }
2042
2043 return;
2044
2045 trunc:
2046 printf(" [|BGP]");
2047 }
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