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Before subtracting a value from a prefix length, make sure the prefix
[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 1.98 2005-10-16 18:14:55 guy 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 if (24 > plen)
495 return -1;
496
497 plen-=24; /* adjust prefixlen - labellength */
498
499 if (32 < plen)
500 return -1;
501
502 memset(&addr, 0, sizeof(addr));
503 TCHECK2(pptr[4], (plen + 7) / 8);
504 memcpy(&addr, &pptr[4], (plen + 7) / 8);
505 if (plen % 8) {
506 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
507 ((0xff00 >> (plen % 8)) & 0xff);
508 }
509 /* the label may get offsetted by 4 bits so lets shift it right */
510 snprintf(buf, buflen, "%s/%d, label:%u %s",
511 getname((u_char *)&addr),
512 plen,
513 EXTRACT_24BITS(pptr+1)>>4,
514 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
515
516 return 4 + (plen + 7) / 8;
517
518 trunc:
519 return -2;
520 }
521
522 /* RDs and RTs share the same semantics
523 * we use bgp_vpn_rd_print for
524 * printing route targets inside a NLRI */
525 char *
526 bgp_vpn_rd_print (const u_char *pptr) {
527
528 /* allocate space for the largest possible string */
529 static char rd[sizeof("xxxxxxxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")];
530 char *pos = rd;
531
532 /* ok lets load the RD format */
533 switch (EXTRACT_16BITS(pptr)) {
534
535 /* AS:IP-address fmt*/
536 case 0:
537 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u.%u.%u.%u",
538 EXTRACT_16BITS(pptr+2), *(pptr+4), *(pptr+5), *(pptr+6), *(pptr+7));
539 break;
540 /* IP-address:AS fmt*/
541
542 case 1:
543 snprintf(pos, sizeof(rd) - (pos - rd), "%u.%u.%u.%u:%u",
544 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
545 break;
546
547 /* 4-byte-AS:number fmt*/
548 case 2:
549 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u (%u.%u.%u.%u:%u)",
550 EXTRACT_32BITS(pptr+2), EXTRACT_16BITS(pptr+6),
551 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
552 break;
553 default:
554 snprintf(pos, sizeof(rd) - (pos - rd), "unknown RD format");
555 break;
556 }
557 pos += strlen(pos);
558 *(pos) = '\0';
559 return (rd);
560 }
561
562 static int
563 decode_rt_routing_info(const u_char *pptr, char *buf, u_int buflen)
564 {
565 u_int8_t route_target[8];
566 u_int plen;
567
568 TCHECK(pptr[0]);
569 plen = pptr[0]; /* get prefix length */
570
571 if (0 == plen)
572 return 1; /* default route target */
573
574 if (32 > plen)
575 return -1;
576
577 plen-=32; /* adjust prefix length */
578
579 if (64 < plen)
580 return -1;
581
582 memset(&route_target, 0, sizeof(route_target));
583 TCHECK2(pptr[1], (plen + 7) / 8);
584 memcpy(&route_target, &pptr[1], (plen + 7) / 8);
585 if (plen % 8) {
586 ((u_char *)&route_target)[(plen + 7) / 8 - 1] &=
587 ((0xff00 >> (plen % 8)) & 0xff);
588 }
589 snprintf(buf, buflen, "origin AS: %u, route target %s",
590 EXTRACT_32BITS(pptr+1),
591 bgp_vpn_rd_print((u_char *)&route_target));
592
593 return 5 + (plen + 7) / 8;
594
595 trunc:
596 return -2;
597 }
598
599 static int
600 decode_labeled_vpn_prefix4(const u_char *pptr, char *buf, u_int buflen)
601 {
602 struct in_addr addr;
603 u_int plen;
604
605 TCHECK(pptr[0]);
606 plen = pptr[0]; /* get prefix length */
607
608 if ((24+64) > plen)
609 return -1;
610
611 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
612
613 if (32 < plen)
614 return -1;
615
616 memset(&addr, 0, sizeof(addr));
617 TCHECK2(pptr[12], (plen + 7) / 8);
618 memcpy(&addr, &pptr[12], (plen + 7) / 8);
619 if (plen % 8) {
620 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
621 ((0xff00 >> (plen % 8)) & 0xff);
622 }
623 /* the label may get offsetted by 4 bits so lets shift it right */
624 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
625 bgp_vpn_rd_print(pptr+4),
626 getname((u_char *)&addr),
627 plen,
628 EXTRACT_24BITS(pptr+1)>>4,
629 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
630
631 return 12 + (plen + 7) / 8;
632
633 trunc:
634 return -2;
635 }
636
637 static int
638 decode_labeled_vpn_l2(const u_char *pptr, char *buf, u_int buflen)
639 {
640 int plen,tlen,strlen,tlv_type,tlv_len,ttlv_len;
641
642 TCHECK2(pptr[0], 2);
643 plen=EXTRACT_16BITS(pptr);
644 tlen=plen;
645 pptr+=2;
646 TCHECK2(pptr[0],15);
647 strlen=snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u",
648 bgp_vpn_rd_print(pptr),
649 EXTRACT_16BITS(pptr+8),
650 EXTRACT_16BITS(pptr+10),
651 EXTRACT_24BITS(pptr+12)>>4); /* the label is offsetted by 4 bits so lets shift it right */
652 pptr+=15;
653 tlen-=15;
654
655 /* ok now the variable part - lets read out TLVs*/
656 while (tlen>0) {
657 if (tlen < 3)
658 return -1;
659 TCHECK2(pptr[0], 3);
660 tlv_type=*pptr++;
661 tlv_len=EXTRACT_16BITS(pptr);
662 ttlv_len=tlv_len;
663 pptr+=2;
664
665 switch(tlv_type) {
666 case 1:
667 strlen+=snprintf(buf+strlen,buflen-strlen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
668 tlv_type,
669 tlv_len);
670 ttlv_len=ttlv_len/8+1; /* how many bytes do we need to read ? */
671 while (ttlv_len>0) {
672 TCHECK(pptr[0]);
673 strlen+=snprintf(buf+strlen,buflen-strlen, "%02x",*pptr++);
674 ttlv_len--;
675 }
676 break;
677 default:
678 snprintf(buf+strlen,buflen-strlen, "\n\t\tunknown TLV #%u, length: %u",
679 tlv_type,
680 tlv_len);
681 break;
682 }
683 tlen-=(tlv_len<<3); /* the tlv-length is expressed in bits so lets shift it tright */
684 }
685 return plen+2;
686
687 trunc:
688 return -2;
689 }
690
691 #ifdef INET6
692 int
693 decode_prefix6(const u_char *pd, char *buf, u_int buflen)
694 {
695 struct in6_addr addr;
696 u_int plen;
697
698 TCHECK(pd[0]);
699 plen = pd[0];
700 if (128 < plen)
701 return -1;
702
703 memset(&addr, 0, sizeof(addr));
704 TCHECK2(pd[1], (plen + 7) / 8);
705 memcpy(&addr, &pd[1], (plen + 7) / 8);
706 if (plen % 8) {
707 addr.s6_addr[(plen + 7) / 8 - 1] &=
708 ((0xff00 >> (plen % 8)) & 0xff);
709 }
710 snprintf(buf, buflen, "%s/%d", getname6((u_char *)&addr), plen);
711 return 1 + (plen + 7) / 8;
712
713 trunc:
714 return -2;
715 }
716
717 static int
718 decode_labeled_prefix6(const u_char *pptr, char *buf, u_int buflen)
719 {
720 struct in6_addr addr;
721 u_int plen;
722
723 TCHECK(pptr[0]);
724 plen = pptr[0]; /* get prefix length */
725
726 if (24 > plen)
727 return -1;
728
729 plen-=24; /* adjust prefixlen - labellength */
730
731 if (128 < plen)
732 return -1;
733
734 memset(&addr, 0, sizeof(addr));
735 TCHECK2(pptr[4], (plen + 7) / 8);
736 memcpy(&addr, &pptr[4], (plen + 7) / 8);
737 if (plen % 8) {
738 addr.s6_addr[(plen + 7) / 8 - 1] &=
739 ((0xff00 >> (plen % 8)) & 0xff);
740 }
741 /* the label may get offsetted by 4 bits so lets shift it right */
742 snprintf(buf, buflen, "%s/%d, label:%u %s",
743 getname6((u_char *)&addr),
744 plen,
745 EXTRACT_24BITS(pptr+1)>>4,
746 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
747
748 return 4 + (plen + 7) / 8;
749
750 trunc:
751 return -2;
752 }
753
754 static int
755 decode_labeled_vpn_prefix6(const u_char *pptr, char *buf, u_int buflen)
756 {
757 struct in6_addr addr;
758 u_int plen;
759
760 TCHECK(pptr[0]);
761 plen = pptr[0]; /* get prefix length */
762
763 if ((24+64) > plen)
764 return -1;
765
766 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
767
768 if (128 < plen)
769 return -1;
770
771 memset(&addr, 0, sizeof(addr));
772 TCHECK2(pptr[12], (plen + 7) / 8);
773 memcpy(&addr, &pptr[12], (plen + 7) / 8);
774 if (plen % 8) {
775 addr.s6_addr[(plen + 7) / 8 - 1] &=
776 ((0xff00 >> (plen % 8)) & 0xff);
777 }
778 /* the label may get offsetted by 4 bits so lets shift it right */
779 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
780 bgp_vpn_rd_print(pptr+4),
781 getname6((u_char *)&addr),
782 plen,
783 EXTRACT_24BITS(pptr+1)>>4,
784 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
785
786 return 12 + (plen + 7) / 8;
787
788 trunc:
789 return -2;
790 }
791 #endif
792
793 static int
794 decode_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
795 {
796 u_int8_t addr[19];
797 u_int plen;
798
799 TCHECK(pptr[0]);
800 plen = pptr[0]; /* get prefix length */
801
802 if (152 < plen)
803 return -1;
804
805 memset(&addr, 0, sizeof(addr));
806 TCHECK2(pptr[4], (plen + 7) / 8);
807 memcpy(&addr, &pptr[4], (plen + 7) / 8);
808 if (plen % 8) {
809 addr[(plen + 7) / 8 - 1] &=
810 ((0xff00 >> (plen % 8)) & 0xff);
811 }
812 snprintf(buf, buflen, "%s/%d",
813 isonsap_string(addr,(plen + 7) / 8),
814 plen);
815
816 return 1 + (plen + 7) / 8;
817
818 trunc:
819 return -2;
820 }
821
822 static int
823 decode_labeled_vpn_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
824 {
825 u_int8_t addr[19];
826 u_int plen;
827
828 TCHECK(pptr[0]);
829 plen = pptr[0]; /* get prefix length */
830
831 if ((24+64) > plen)
832 return -1;
833
834 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
835
836 if (152 < plen)
837 return -1;
838
839 memset(&addr, 0, sizeof(addr));
840 TCHECK2(pptr[12], (plen + 7) / 8);
841 memcpy(&addr, &pptr[12], (plen + 7) / 8);
842 if (plen % 8) {
843 addr[(plen + 7) / 8 - 1] &=
844 ((0xff00 >> (plen % 8)) & 0xff);
845 }
846 /* the label may get offsetted by 4 bits so lets shift it right */
847 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
848 bgp_vpn_rd_print(pptr+4),
849 isonsap_string(addr,(plen + 7) / 8),
850 plen,
851 EXTRACT_24BITS(pptr+1)>>4,
852 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
853
854 return 12 + (plen + 7) / 8;
855
856 trunc:
857 return -2;
858 }
859
860 static int
861 bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len)
862 {
863 int i;
864 u_int16_t af;
865 u_int8_t safi, snpa, nhlen;
866 union { /* copy buffer for bandwidth values */
867 float f;
868 u_int32_t i;
869 } bw;
870 int advance;
871 int tlen;
872 const u_char *tptr;
873 char buf[MAXHOSTNAMELEN + 100];
874 char tokbuf[TOKBUFSIZE];
875
876 tptr = pptr;
877 tlen=len;
878
879 switch (attr->bgpa_type) {
880 case BGPTYPE_ORIGIN:
881 if (len != 1)
882 printf("invalid len");
883 else {
884 TCHECK(*tptr);
885 printf("%s", tok2strbuf(bgp_origin_values,
886 "Unknown Origin Typecode",
887 tptr[0],
888 tokbuf, sizeof(tokbuf)));
889 }
890 break;
891
892 case BGPTYPE_AS_PATH:
893 if (len % 2) {
894 printf("invalid len");
895 break;
896 }
897 if (!len) {
898 printf("empty");
899 break;
900 }
901
902 while (tptr < pptr + len) {
903 TCHECK(tptr[0]);
904 printf("%s", tok2strbuf(bgp_as_path_segment_open_values,
905 "?", tptr[0],
906 tokbuf, sizeof(tokbuf)));
907 for (i = 0; i < tptr[1] * 2; i += 2) {
908 TCHECK2(tptr[2 + i], 2);
909 printf("%u ", EXTRACT_16BITS(&tptr[2 + i]));
910 }
911 TCHECK(tptr[0]);
912 printf("%s", tok2strbuf(bgp_as_path_segment_close_values,
913 "?", tptr[0],
914 tokbuf, sizeof(tokbuf)));
915 TCHECK(tptr[1]);
916 tptr += 2 + tptr[1] * 2;
917 }
918 break;
919 case BGPTYPE_NEXT_HOP:
920 if (len != 4)
921 printf("invalid len");
922 else {
923 TCHECK2(tptr[0], 4);
924 printf("%s", getname(tptr));
925 }
926 break;
927 case BGPTYPE_MULTI_EXIT_DISC:
928 case BGPTYPE_LOCAL_PREF:
929 if (len != 4)
930 printf("invalid len");
931 else {
932 TCHECK2(tptr[0], 4);
933 printf("%u", EXTRACT_32BITS(tptr));
934 }
935 break;
936 case BGPTYPE_ATOMIC_AGGREGATE:
937 if (len != 0)
938 printf("invalid len");
939 break;
940 case BGPTYPE_AGGREGATOR:
941 if (len != 6) {
942 printf("invalid len");
943 break;
944 }
945 TCHECK2(tptr[0], 6);
946 printf(" AS #%u, origin %s", EXTRACT_16BITS(tptr),
947 getname(tptr + 2));
948 break;
949 case BGPTYPE_COMMUNITIES:
950 if (len % 4) {
951 printf("invalid len");
952 break;
953 }
954 while (tlen>0) {
955 u_int32_t comm;
956 TCHECK2(tptr[0], 4);
957 comm = EXTRACT_32BITS(tptr);
958 switch (comm) {
959 case BGP_COMMUNITY_NO_EXPORT:
960 printf(" NO_EXPORT");
961 break;
962 case BGP_COMMUNITY_NO_ADVERT:
963 printf(" NO_ADVERTISE");
964 break;
965 case BGP_COMMUNITY_NO_EXPORT_SUBCONFED:
966 printf(" NO_EXPORT_SUBCONFED");
967 break;
968 default:
969 printf("%u:%u%s",
970 (comm >> 16) & 0xffff,
971 comm & 0xffff,
972 (tlen>4) ? ", " : "");
973 break;
974 }
975 tlen -=4;
976 tptr +=4;
977 }
978 break;
979 case BGPTYPE_ORIGINATOR_ID:
980 if (len != 4) {
981 printf("invalid len");
982 break;
983 }
984 TCHECK2(tptr[0], 4);
985 printf("%s",getname(tptr));
986 break;
987 case BGPTYPE_CLUSTER_LIST:
988 if (len % 4) {
989 printf("invalid len");
990 break;
991 }
992 while (tlen>0) {
993 TCHECK2(tptr[0], 4);
994 printf("%s%s",
995 getname(tptr),
996 (tlen>4) ? ", " : "");
997 tlen -=4;
998 tptr +=4;
999 }
1000 break;
1001 case BGPTYPE_MP_REACH_NLRI:
1002 TCHECK2(tptr[0], 3);
1003 af = EXTRACT_16BITS(tptr);
1004 safi = tptr[2];
1005
1006 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1007 tok2strbuf(bgp_afi_values, "Unknown AFI", af,
1008 tokbuf, sizeof(tokbuf)),
1009 af,
1010 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1011 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1012 tokbuf, sizeof(tokbuf)),
1013 safi);
1014
1015 switch(af<<8 | safi) {
1016 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1017 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1018 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1019 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1020 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1021 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1022 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1023 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1024 #ifdef INET6
1025 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1026 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1027 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1028 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1029 case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1030 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1031 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1032 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1033 #endif
1034 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1035 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1036 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1037 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1038 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1039 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1040 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1041 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1042 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1043 break;
1044 default:
1045 TCHECK2(tptr[0], tlen);
1046 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1047 if (vflag <= 1)
1048 print_unknown_data(tptr,"\n\t ",tlen);
1049 goto done;
1050 break;
1051 }
1052
1053 tptr +=3;
1054
1055 TCHECK(tptr[0]);
1056 nhlen = tptr[0];
1057 tlen = nhlen;
1058 tptr++;
1059
1060 if (tlen) {
1061 printf("\n\t nexthop: ");
1062 while (tlen > 0) {
1063 switch(af<<8 | safi) {
1064 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1065 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1066 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1067 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1068 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1069 if (tlen < (int)sizeof(struct in_addr)) {
1070 printf("invalid len");
1071 tlen = 0;
1072 } else {
1073 TCHECK2(tptr[0], sizeof(struct in_addr));
1074 printf("%s",getname(tptr));
1075 tlen -= sizeof(struct in_addr);
1076 tptr += sizeof(struct in_addr);
1077 }
1078 break;
1079 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1080 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1081 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1082 if (tlen < (int)(sizeof(struct in_addr)+BGP_VPN_RD_LEN)) {
1083 printf("invalid len");
1084 tlen = 0;
1085 } else {
1086 TCHECK2(tptr[0], sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1087 printf("RD: %s, %s",
1088 bgp_vpn_rd_print(tptr),
1089 getname(tptr+BGP_VPN_RD_LEN));
1090 tlen -= (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1091 tptr += (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1092 }
1093 break;
1094 #ifdef INET6
1095 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1096 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1097 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1098 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1099 case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1100 if (tlen < (int)sizeof(struct in6_addr)) {
1101 printf("invalid len");
1102 tlen = 0;
1103 } else {
1104 TCHECK2(tptr[0], sizeof(struct in6_addr));
1105 printf("%s", getname6(tptr));
1106 tlen -= sizeof(struct in6_addr);
1107 tptr += sizeof(struct in6_addr);
1108 }
1109 break;
1110 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1111 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1112 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1113 if (tlen < (int)(sizeof(struct in6_addr)+BGP_VPN_RD_LEN)) {
1114 printf("invalid len");
1115 tlen = 0;
1116 } else {
1117 TCHECK2(tptr[0], sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1118 printf("RD: %s, %s",
1119 bgp_vpn_rd_print(tptr),
1120 getname6(tptr+BGP_VPN_RD_LEN));
1121 tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1122 tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1123 }
1124 break;
1125 #endif
1126 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1127 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1128 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1129 if (tlen < (int)sizeof(struct in_addr)) {
1130 printf("invalid len");
1131 tlen = 0;
1132 } else {
1133 TCHECK2(tptr[0], sizeof(struct in_addr));
1134 printf("%s", getname(tptr));
1135 tlen -= (sizeof(struct in_addr));
1136 tptr += (sizeof(struct in_addr));
1137 }
1138 break;
1139 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1140 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1141 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1142 TCHECK2(tptr[0], tlen);
1143 printf("%s",isonsap_string(tptr,tlen));
1144 tptr += tlen;
1145 tlen = 0;
1146 break;
1147
1148 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1149 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1150 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1151 if (tlen < BGP_VPN_RD_LEN+1) {
1152 printf("invalid len");
1153 tlen = 0;
1154 } else {
1155 TCHECK2(tptr[0], tlen);
1156 printf("RD: %s, %s",
1157 bgp_vpn_rd_print(tptr),
1158 isonsap_string(tptr+BGP_VPN_RD_LEN,tlen-BGP_VPN_RD_LEN));
1159 /* rfc986 mapped IPv4 address ? */
1160 if (EXTRACT_32BITS(tptr+BGP_VPN_RD_LEN) == 0x47000601)
1161 printf(" = %s", getname(tptr+BGP_VPN_RD_LEN+4));
1162 #ifdef INET6
1163 /* rfc1888 mapped IPv6 address ? */
1164 else if (EXTRACT_24BITS(tptr+BGP_VPN_RD_LEN) == 0x350000)
1165 printf(" = %s", getname6(tptr+BGP_VPN_RD_LEN+3));
1166 #endif
1167 tptr += tlen;
1168 tlen = 0;
1169 }
1170 break;
1171 default:
1172 TCHECK2(tptr[0], tlen);
1173 printf("no AFI %u/SAFI %u decoder",af,safi);
1174 if (vflag <= 1)
1175 print_unknown_data(tptr,"\n\t ",tlen);
1176 tptr += tlen;
1177 tlen = 0;
1178 goto done;
1179 break;
1180 }
1181 }
1182 }
1183 printf(", nh-length: %u", nhlen);
1184 tptr += tlen;
1185
1186 TCHECK(tptr[0]);
1187 snpa = tptr[0];
1188 tptr++;
1189
1190 if (snpa) {
1191 printf("\n\t %u SNPA", snpa);
1192 for (/*nothing*/; snpa > 0; snpa--) {
1193 TCHECK(tptr[0]);
1194 printf("\n\t %d bytes", tptr[0]);
1195 tptr += tptr[0] + 1;
1196 }
1197 } else {
1198 printf(", no SNPA");
1199 }
1200
1201 while (len - (tptr - pptr) > 0) {
1202 switch (af<<8 | safi) {
1203 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1204 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1205 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1206 advance = decode_prefix4(tptr, buf, sizeof(buf));
1207 if (advance == -1)
1208 printf("\n\t (illegal prefix length)");
1209 else if (advance == -2)
1210 goto trunc;
1211 else
1212 printf("\n\t %s", buf);
1213 break;
1214 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1215 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1216 if (advance == -1)
1217 printf("\n\t (illegal prefix length)");
1218 else if (advance == -2)
1219 goto trunc;
1220 else
1221 printf("\n\t %s", buf);
1222 break;
1223 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1224 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1225 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1226 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1227 if (advance == -1)
1228 printf("\n\t (illegal prefix length)");
1229 else if (advance == -2)
1230 goto trunc;
1231 else
1232 printf("\n\t %s", buf);
1233 break;
1234 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1235 advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1236 if (advance == -1)
1237 printf("\n\t (illegal prefix length)");
1238 else if (advance == -2)
1239 goto trunc;
1240 else
1241 printf("\n\t %s", buf);
1242 break;
1243 #ifdef INET6
1244 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1245 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1246 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1247 advance = decode_prefix6(tptr, buf, sizeof(buf));
1248 if (advance == -1)
1249 printf("\n\t (illegal prefix length)");
1250 else if (advance == -2)
1251 goto trunc;
1252 else
1253 printf("\n\t %s", buf);
1254 break;
1255 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1256 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1257 if (advance == -1)
1258 printf("\n\t (illegal prefix length)");
1259 else if (advance == -2)
1260 goto trunc;
1261 else
1262 printf("\n\t %s", buf);
1263 break;
1264 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1265 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1266 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1267 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1268 if (advance == -1)
1269 printf("\n\t (illegal prefix length)");
1270 else if (advance == -2)
1271 goto trunc;
1272 else
1273 printf("\n\t %s", buf);
1274 break;
1275 case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1276 advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1277 if (advance == -1)
1278 printf("\n\t (illegal prefix length)");
1279 else if (advance == -2)
1280 goto trunc;
1281 else
1282 printf("\n\t %s", buf);
1283 break;
1284 #endif
1285 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1286 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1287 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1288 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1289 if (advance == -1)
1290 printf("\n\t (illegal length)");
1291 else if (advance == -2)
1292 goto trunc;
1293 else
1294 printf("\n\t %s", buf);
1295 break;
1296 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1297 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1298 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1299 advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1300 if (advance == -1)
1301 printf("\n\t (illegal prefix length)");
1302 else if (advance == -2)
1303 goto trunc;
1304 else
1305 printf("\n\t %s", buf);
1306 break;
1307 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1308 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1309 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1310 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1311 if (advance == -1)
1312 printf("\n\t (illegal prefix length)");
1313 else if (advance == -2)
1314 goto trunc;
1315 else
1316 printf("\n\t %s", buf);
1317 break;
1318 default:
1319 TCHECK2(*tptr,tlen);
1320 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1321 if (vflag <= 1)
1322 print_unknown_data(tptr,"\n\t ",tlen);
1323 advance = 0;
1324 tptr = pptr + len;
1325 break;
1326 }
1327 if (advance < 0)
1328 break;
1329 tptr += advance;
1330 }
1331 done:
1332 break;
1333
1334 case BGPTYPE_MP_UNREACH_NLRI:
1335 TCHECK2(tptr[0], BGP_MP_NLRI_MINSIZE);
1336 af = EXTRACT_16BITS(tptr);
1337 safi = tptr[2];
1338
1339 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1340 tok2strbuf(bgp_afi_values, "Unknown AFI", af,
1341 tokbuf, sizeof(tokbuf)),
1342 af,
1343 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1344 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1345 tokbuf, sizeof(tokbuf)),
1346 safi);
1347
1348 if (len == BGP_MP_NLRI_MINSIZE)
1349 printf("\n\t End-of-Rib Marker (empty NLRI)");
1350
1351 tptr += 3;
1352
1353 while (len - (tptr - pptr) > 0) {
1354 switch (af<<8 | safi) {
1355 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1356 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1357 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1358 advance = decode_prefix4(tptr, buf, sizeof(buf));
1359 if (advance == -1)
1360 printf("\n\t (illegal prefix length)");
1361 else if (advance == -2)
1362 goto trunc;
1363 else
1364 printf("\n\t %s", buf);
1365 break;
1366 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1367 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1368 if (advance == -1)
1369 printf("\n\t (illegal prefix length)");
1370 else if (advance == -2)
1371 goto trunc;
1372 else
1373 printf("\n\t %s", buf);
1374 break;
1375 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1376 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1377 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1378 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1379 if (advance == -1)
1380 printf("\n\t (illegal prefix length)");
1381 else if (advance == -2)
1382 goto trunc;
1383 else
1384 printf("\n\t %s", buf);
1385 break;
1386 #ifdef INET6
1387 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1388 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1389 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1390 advance = decode_prefix6(tptr, buf, sizeof(buf));
1391 if (advance == -1)
1392 printf("\n\t (illegal prefix length)");
1393 else if (advance == -2)
1394 goto trunc;
1395 else
1396 printf("\n\t %s", buf);
1397 break;
1398 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1399 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1400 if (advance == -1)
1401 printf("\n\t (illegal prefix length)");
1402 else if (advance == -2)
1403 goto trunc;
1404 else
1405 printf("\n\t %s", buf);
1406 break;
1407 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1408 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1409 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1410 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1411 if (advance == -1)
1412 printf("\n\t (illegal prefix length)");
1413 else if (advance == -2)
1414 goto trunc;
1415 else
1416 printf("\n\t %s", buf);
1417 break;
1418 #endif
1419 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1420 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1421 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1422 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1423 if (advance == -1)
1424 printf("\n\t (illegal length)");
1425 else if (advance == -2)
1426 goto trunc;
1427 else
1428 printf("\n\t %s", buf);
1429 break;
1430 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1431 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1432 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1433 advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1434 if (advance == -1)
1435 printf("\n\t (illegal prefix length)");
1436 else if (advance == -2)
1437 goto trunc;
1438 else
1439 printf("\n\t %s", buf);
1440 break;
1441 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1442 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1443 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1444 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1445 if (advance == -1)
1446 printf("\n\t (illegal prefix length)");
1447 else if (advance == -2)
1448 goto trunc;
1449 else
1450 printf("\n\t %s", buf);
1451 break;
1452 default:
1453 TCHECK2(*(tptr-3),tlen);
1454 printf("no AFI %u / SAFI %u decoder",af,safi);
1455 if (vflag <= 1)
1456 print_unknown_data(tptr-3,"\n\t ",tlen);
1457 advance = 0;
1458 tptr = pptr + len;
1459 break;
1460 }
1461 if (advance < 0)
1462 break;
1463 tptr += advance;
1464 }
1465 break;
1466 case BGPTYPE_EXTD_COMMUNITIES:
1467 if (len % 8) {
1468 printf("invalid len");
1469 break;
1470 }
1471 while (tlen>0) {
1472 u_int16_t extd_comm;
1473
1474 TCHECK2(tptr[0], 2);
1475 extd_comm=EXTRACT_16BITS(tptr);
1476
1477 printf("\n\t %s (0x%04x), Flags [%s]",
1478 tok2strbuf(bgp_extd_comm_subtype_values,
1479 "unknown extd community typecode",
1480 extd_comm, tokbuf, sizeof(tokbuf)),
1481 extd_comm,
1482 bittok2str(bgp_extd_comm_flag_values, "none", extd_comm));
1483
1484 TCHECK2(*(tptr+2), 6);
1485 switch(extd_comm) {
1486 case BGP_EXT_COM_RT_0:
1487 case BGP_EXT_COM_RO_0:
1488 printf(": %u:%s",
1489 EXTRACT_16BITS(tptr+2),
1490 getname(tptr+4));
1491 break;
1492 case BGP_EXT_COM_RT_1:
1493 case BGP_EXT_COM_RO_1:
1494 printf(": %s:%u",
1495 getname(tptr+2),
1496 EXTRACT_16BITS(tptr+6));
1497 break;
1498 case BGP_EXT_COM_RT_2:
1499 case BGP_EXT_COM_RO_2:
1500 printf(": %u:%u",
1501 EXTRACT_32BITS(tptr+2),
1502 EXTRACT_16BITS(tptr+6));
1503 break;
1504 case BGP_EXT_COM_LINKBAND:
1505 bw.i = EXTRACT_32BITS(tptr+2);
1506 printf(": bandwidth: %.3f Mbps",
1507 bw.f*8/1000000);
1508 break;
1509 case BGP_EXT_COM_CISCO_MCAST:
1510 printf(": AS %u, group %s",
1511 EXTRACT_16BITS(tptr+2),
1512 getname(tptr+4));
1513 break;
1514 case BGP_EXT_COM_VPN_ORIGIN:
1515 case BGP_EXT_COM_VPN_ORIGIN2:
1516 case BGP_EXT_COM_VPN_ORIGIN3:
1517 case BGP_EXT_COM_VPN_ORIGIN4:
1518 case BGP_EXT_COM_OSPF_RID:
1519 case BGP_EXT_COM_OSPF_RID2:
1520 printf("%s", getname(tptr+2));
1521 break;
1522 case BGP_EXT_COM_OSPF_RTYPE:
1523 case BGP_EXT_COM_OSPF_RTYPE2:
1524 printf(": area:%s, router-type:%s, metric-type:%s%s",
1525 getname(tptr+2),
1526 tok2strbuf(bgp_extd_comm_ospf_rtype_values,
1527 "unknown (0x%02x)",
1528 *(tptr+6),
1529 tokbuf, sizeof(tokbuf)),
1530 (*(tptr+7) & BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "",
1531 (*(tptr+6) == (BGP_OSPF_RTYPE_EXT ||BGP_OSPF_RTYPE_NSSA )) ? "E1" : "");
1532 break;
1533 case BGP_EXT_COM_L2INFO:
1534 printf(": %s Control Flags [0x%02x]:MTU %u",
1535 tok2strbuf(l2vpn_encaps_values,
1536 "unknown encaps",
1537 *(tptr+2),
1538 tokbuf, sizeof(tokbuf)),
1539 *(tptr+3),
1540 EXTRACT_16BITS(tptr+4));
1541 break;
1542 default:
1543 TCHECK2(*tptr,8);
1544 print_unknown_data(tptr,"\n\t ",8);
1545 break;
1546 }
1547 tlen -=8;
1548 tptr +=8;
1549 }
1550 break;
1551
1552 case BGPTYPE_ATTR_SET:
1553 TCHECK2(tptr[0], 4);
1554 printf("\n\t Origin AS: %u", EXTRACT_32BITS(tptr));
1555 tptr+=4;
1556 len -=4;
1557
1558 while (len >= 2 ) {
1559 int alen;
1560 struct bgp_attr bgpa;
1561
1562 TCHECK2(tptr[0], sizeof(bgpa));
1563 memcpy(&bgpa, tptr, sizeof(bgpa));
1564 alen = bgp_attr_len(&bgpa);
1565 tptr += bgp_attr_off(&bgpa);
1566 len -= bgp_attr_off(&bgpa);
1567
1568 printf("\n\t %s (%u), length: %u",
1569 tok2strbuf(bgp_attr_values,
1570 "Unknown Attribute", bgpa.bgpa_type,
1571 tokbuf, sizeof(tokbuf)),
1572 bgpa.bgpa_type,
1573 alen);
1574
1575 if (bgpa.bgpa_flags) {
1576 printf(", Flags [%s%s%s%s",
1577 bgpa.bgpa_flags & 0x80 ? "O" : "",
1578 bgpa.bgpa_flags & 0x40 ? "T" : "",
1579 bgpa.bgpa_flags & 0x20 ? "P" : "",
1580 bgpa.bgpa_flags & 0x10 ? "E" : "");
1581 if (bgpa.bgpa_flags & 0xf)
1582 printf("+%x", bgpa.bgpa_flags & 0xf);
1583 printf("]: ");
1584 }
1585 /* FIXME check for recursion */
1586 if (!bgp_attr_print(&bgpa, tptr, alen))
1587 return 0;
1588 tptr += alen;
1589 len -= alen;
1590 }
1591 break;
1592
1593
1594 default:
1595 TCHECK2(*pptr,len);
1596 printf("\n\t no Attribute %u decoder",attr->bgpa_type); /* we have no decoder for the attribute */
1597 if (vflag <= 1)
1598 print_unknown_data(pptr,"\n\t ",len);
1599 break;
1600 }
1601 if (vflag > 1 && len) { /* omit zero length attributes*/
1602 TCHECK2(*pptr,len);
1603 print_unknown_data(pptr,"\n\t ",len);
1604 }
1605 return 1;
1606
1607 trunc:
1608 return 0;
1609 }
1610
1611 static void
1612 bgp_open_print(const u_char *dat, int length)
1613 {
1614 struct bgp_open bgpo;
1615 struct bgp_opt bgpopt;
1616 const u_char *opt;
1617 int i,cap_type,cap_len,tcap_len,cap_offset;
1618 char tokbuf[TOKBUFSIZE];
1619 char tokbuf2[TOKBUFSIZE];
1620
1621 TCHECK2(dat[0], BGP_OPEN_SIZE);
1622 memcpy(&bgpo, dat, BGP_OPEN_SIZE);
1623
1624 printf("\n\t Version %d, ", bgpo.bgpo_version);
1625 printf("my AS %u, ", ntohs(bgpo.bgpo_myas));
1626 printf("Holdtime %us, ", ntohs(bgpo.bgpo_holdtime));
1627 printf("ID %s", getname((u_char *)&bgpo.bgpo_id));
1628 printf("\n\t Optional parameters, length: %u", bgpo.bgpo_optlen);
1629
1630 /* some little sanity checking */
1631 if (length < bgpo.bgpo_optlen+BGP_OPEN_SIZE)
1632 return;
1633
1634 /* ugly! */
1635 opt = &((const struct bgp_open *)dat)->bgpo_optlen;
1636 opt++;
1637
1638 i = 0;
1639 while (i < bgpo.bgpo_optlen) {
1640 TCHECK2(opt[i], BGP_OPT_SIZE);
1641 memcpy(&bgpopt, &opt[i], BGP_OPT_SIZE);
1642 if (i + 2 + bgpopt.bgpopt_len > bgpo.bgpo_optlen) {
1643 printf("\n\t Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len);
1644 break;
1645 }
1646
1647 printf("\n\t Option %s (%u), length: %u",
1648 tok2strbuf(bgp_opt_values,"Unknown",
1649 bgpopt.bgpopt_type,
1650 tokbuf, sizeof(tokbuf)),
1651 bgpopt.bgpopt_type,
1652 bgpopt.bgpopt_len);
1653
1654 /* now lets decode the options we know*/
1655 switch(bgpopt.bgpopt_type) {
1656 case BGP_OPT_CAP:
1657 cap_type=opt[i+BGP_OPT_SIZE];
1658 cap_len=opt[i+BGP_OPT_SIZE+1];
1659 tcap_len=cap_len;
1660 printf("\n\t %s (%u), length: %u",
1661 tok2strbuf(bgp_capcode_values, "Unknown",
1662 cap_type, tokbuf, sizeof(tokbuf)),
1663 cap_type,
1664 cap_len);
1665 switch(cap_type) {
1666 case BGP_CAPCODE_MP:
1667 printf("\n\t\tAFI %s (%u), SAFI %s (%u)",
1668 tok2strbuf(bgp_afi_values, "Unknown",
1669 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1670 tokbuf, sizeof(tokbuf)),
1671 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1672 tok2strbuf(bgp_safi_values, "Unknown",
1673 opt[i+BGP_OPT_SIZE+5],
1674 tokbuf, sizeof(tokbuf)),
1675 opt[i+BGP_OPT_SIZE+5]);
1676 break;
1677 case BGP_CAPCODE_RESTART:
1678 printf("\n\t\tRestart Flags: [%s], Restart Time %us",
1679 ((opt[i+BGP_OPT_SIZE+2])&0x80) ? "R" : "none",
1680 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2)&0xfff);
1681 tcap_len-=2;
1682 cap_offset=4;
1683 while(tcap_len>=4) {
1684 printf("\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s",
1685 tok2strbuf(bgp_afi_values,"Unknown",
1686 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1687 tokbuf, sizeof(tokbuf)),
1688 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1689 tok2strbuf(bgp_safi_values,"Unknown",
1690 opt[i+BGP_OPT_SIZE+cap_offset+2],
1691 tokbuf2, sizeof(tokbuf2)),
1692 opt[i+BGP_OPT_SIZE+cap_offset+2],
1693 ((opt[i+BGP_OPT_SIZE+cap_offset+3])&0x80) ? "yes" : "no" );
1694 tcap_len-=4;
1695 cap_offset+=4;
1696 }
1697 break;
1698 case BGP_CAPCODE_RR:
1699 case BGP_CAPCODE_RR_CISCO:
1700 break;
1701 default:
1702 TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
1703 printf("\n\t\tno decoder for Capability %u",
1704 cap_type);
1705 if (vflag <= 1)
1706 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
1707 break;
1708 }
1709 if (vflag > 1) {
1710 TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
1711 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
1712 }
1713 break;
1714 case BGP_OPT_AUTH:
1715 default:
1716 printf("\n\t no decoder for option %u",
1717 bgpopt.bgpopt_type);
1718 break;
1719 }
1720
1721 i += BGP_OPT_SIZE + bgpopt.bgpopt_len;
1722 }
1723 return;
1724 trunc:
1725 printf("[|BGP]");
1726 }
1727
1728 static void
1729 bgp_update_print(const u_char *dat, int length)
1730 {
1731 struct bgp bgp;
1732 struct bgp_attr bgpa;
1733 const u_char *p;
1734 int len;
1735 int i;
1736 char tokbuf[TOKBUFSIZE];
1737
1738 TCHECK2(dat[0], BGP_SIZE);
1739 memcpy(&bgp, dat, BGP_SIZE);
1740 p = dat + BGP_SIZE; /*XXX*/
1741
1742 /* Unfeasible routes */
1743 len = EXTRACT_16BITS(p);
1744 if (len) {
1745 /*
1746 * Without keeping state from the original NLRI message,
1747 * it's not possible to tell if this a v4 or v6 route,
1748 * so only try to decode it if we're not v6 enabled.
1749 */
1750 #ifdef INET6
1751 printf("\n\t Withdrawn routes: %d bytes", len);
1752 #else
1753 char buf[MAXHOSTNAMELEN + 100];
1754 int wpfx;
1755
1756 TCHECK2(p[2], len);
1757 i = 2;
1758
1759 printf("\n\t Withdrawn routes:");
1760
1761 while(i < 2 + len) {
1762 wpfx = decode_prefix4(&p[i], buf, sizeof(buf));
1763 if (wpfx == -1) {
1764 printf("\n\t (illegal prefix length)");
1765 break;
1766 } else if (wpfx == -2)
1767 goto trunc;
1768 else {
1769 i += wpfx;
1770 printf("\n\t %s", buf);
1771 }
1772 }
1773 #endif
1774 }
1775 p += 2 + len;
1776
1777 TCHECK2(p[0], 2);
1778 len = EXTRACT_16BITS(p);
1779
1780 if (len == 0 && length == BGP_UPDATE_MINSIZE) {
1781 printf("\n\t End-of-Rib Marker (empty NLRI)");
1782 return;
1783 }
1784
1785 if (len) {
1786 /* do something more useful!*/
1787 i = 2;
1788 while (i < 2 + len) {
1789 int alen, aoff;
1790
1791 TCHECK2(p[i], sizeof(bgpa));
1792 memcpy(&bgpa, &p[i], sizeof(bgpa));
1793 alen = bgp_attr_len(&bgpa);
1794 aoff = bgp_attr_off(&bgpa);
1795
1796 printf("\n\t %s (%u), length: %u",
1797 tok2strbuf(bgp_attr_values, "Unknown Attribute",
1798 bgpa.bgpa_type,
1799 tokbuf, sizeof(tokbuf)),
1800 bgpa.bgpa_type,
1801 alen);
1802
1803 if (bgpa.bgpa_flags) {
1804 printf(", Flags [%s%s%s%s",
1805 bgpa.bgpa_flags & 0x80 ? "O" : "",
1806 bgpa.bgpa_flags & 0x40 ? "T" : "",
1807 bgpa.bgpa_flags & 0x20 ? "P" : "",
1808 bgpa.bgpa_flags & 0x10 ? "E" : "");
1809 if (bgpa.bgpa_flags & 0xf)
1810 printf("+%x", bgpa.bgpa_flags & 0xf);
1811 printf("]: ");
1812 }
1813 if (!bgp_attr_print(&bgpa, &p[i + aoff], alen))
1814 goto trunc;
1815 i += aoff + alen;
1816 }
1817 }
1818 p += 2 + len;
1819
1820 if (dat + length > p) {
1821 printf("\n\t Updated routes:");
1822 while (dat + length > p) {
1823 char buf[MAXHOSTNAMELEN + 100];
1824 i = decode_prefix4(p, buf, sizeof(buf));
1825 if (i == -1) {
1826 printf("\n\t (illegal prefix length)");
1827 break;
1828 } else if (i == -2)
1829 goto trunc;
1830 else {
1831 printf("\n\t %s", buf);
1832 p += i;
1833 }
1834 }
1835 }
1836 return;
1837 trunc:
1838 printf("[|BGP]");
1839 }
1840
1841 static void
1842 bgp_notification_print(const u_char *dat, int length)
1843 {
1844 struct bgp_notification bgpn;
1845 const u_char *tptr;
1846 char tokbuf[TOKBUFSIZE];
1847 char tokbuf2[TOKBUFSIZE];
1848
1849 TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
1850 memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
1851
1852 /* some little sanity checking */
1853 if (length<BGP_NOTIFICATION_SIZE)
1854 return;
1855
1856 printf(", %s (%u)",
1857 tok2strbuf(bgp_notify_major_values, "Unknown Error",
1858 bgpn.bgpn_major, tokbuf, sizeof(tokbuf)),
1859 bgpn.bgpn_major);
1860
1861 switch (bgpn.bgpn_major) {
1862
1863 case BGP_NOTIFY_MAJOR_MSG:
1864 printf(", subcode %s (%u)",
1865 tok2strbuf(bgp_notify_minor_msg_values, "Unknown",
1866 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1867 bgpn.bgpn_minor);
1868 break;
1869 case BGP_NOTIFY_MAJOR_OPEN:
1870 printf(", subcode %s (%u)",
1871 tok2strbuf(bgp_notify_minor_open_values, "Unknown",
1872 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1873 bgpn.bgpn_minor);
1874 break;
1875 case BGP_NOTIFY_MAJOR_UPDATE:
1876 printf(", subcode %s (%u)",
1877 tok2strbuf(bgp_notify_minor_update_values, "Unknown",
1878 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1879 bgpn.bgpn_minor);
1880 break;
1881 case BGP_NOTIFY_MAJOR_CAP:
1882 printf(" subcode %s (%u)",
1883 tok2strbuf(bgp_notify_minor_cap_values, "Unknown",
1884 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1885 bgpn.bgpn_minor);
1886 case BGP_NOTIFY_MAJOR_CEASE:
1887 printf(", subcode %s (%u)",
1888 tok2strbuf(bgp_notify_minor_cease_values, "Unknown",
1889 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1890 bgpn.bgpn_minor);
1891
1892 /* draft-ietf-idr-cease-subcode-02 mentions optionally 7 bytes
1893 * for the maxprefix subtype, which may contain AFI, SAFI and MAXPREFIXES
1894 */
1895 if(bgpn.bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= BGP_NOTIFICATION_SIZE + 7) {
1896 tptr = dat + BGP_NOTIFICATION_SIZE;
1897 TCHECK2(*tptr, 7);
1898 printf(", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
1899 tok2strbuf(bgp_afi_values, "Unknown",
1900 EXTRACT_16BITS(tptr), tokbuf, sizeof(tokbuf)),
1901 EXTRACT_16BITS(tptr),
1902 tok2strbuf(bgp_safi_values, "Unknown", *(tptr+2),
1903 tokbuf2, sizeof(tokbuf)),
1904 *(tptr+2),
1905 EXTRACT_32BITS(tptr+3));
1906 }
1907 break;
1908 default:
1909 break;
1910 }
1911
1912 return;
1913 trunc:
1914 printf("[|BGP]");
1915 }
1916
1917 static void
1918 bgp_route_refresh_print(const u_char *pptr, int len) {
1919
1920 const struct bgp_route_refresh *bgp_route_refresh_header;
1921 char tokbuf[TOKBUFSIZE];
1922 char tokbuf2[TOKBUFSIZE];
1923
1924 TCHECK2(pptr[0], BGP_ROUTE_REFRESH_SIZE);
1925
1926 /* some little sanity checking */
1927 if (len<BGP_ROUTE_REFRESH_SIZE)
1928 return;
1929
1930 bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
1931
1932 printf("\n\t AFI %s (%u), SAFI %s (%u)",
1933 tok2strbuf(bgp_afi_values,"Unknown",
1934 /* this stinks but the compiler pads the structure
1935 * weird */
1936 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
1937 tokbuf, sizeof(tokbuf)),
1938 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
1939 tok2strbuf(bgp_safi_values,"Unknown",
1940 bgp_route_refresh_header->safi,
1941 tokbuf2, sizeof(tokbuf2)),
1942 bgp_route_refresh_header->safi);
1943
1944 if (vflag > 1) {
1945 TCHECK2(*pptr, len);
1946 print_unknown_data(pptr,"\n\t ", len);
1947 }
1948
1949 return;
1950 trunc:
1951 printf("[|BGP]");
1952 }
1953
1954 static int
1955 bgp_header_print(const u_char *dat, int length)
1956 {
1957 struct bgp bgp;
1958 char tokbuf[TOKBUFSIZE];
1959
1960 TCHECK2(dat[0], BGP_SIZE);
1961 memcpy(&bgp, dat, BGP_SIZE);
1962 printf("\n\t%s Message (%u), length: %u",
1963 tok2strbuf(bgp_msg_values, "Unknown", bgp.bgp_type,
1964 tokbuf, sizeof(tokbuf)),
1965 bgp.bgp_type,
1966 length);
1967
1968 switch (bgp.bgp_type) {
1969 case BGP_OPEN:
1970 bgp_open_print(dat, length);
1971 break;
1972 case BGP_UPDATE:
1973 bgp_update_print(dat, length);
1974 break;
1975 case BGP_NOTIFICATION:
1976 bgp_notification_print(dat, length);
1977 break;
1978 case BGP_KEEPALIVE:
1979 break;
1980 case BGP_ROUTE_REFRESH:
1981 bgp_route_refresh_print(dat, length);
1982 break;
1983 default:
1984 /* we have no decoder for the BGP message */
1985 TCHECK2(*dat, length);
1986 printf("\n\t no Message %u decoder",bgp.bgp_type);
1987 print_unknown_data(dat,"\n\t ",length);
1988 break;
1989 }
1990 return 1;
1991 trunc:
1992 printf("[|BGP]");
1993 return 0;
1994 }
1995
1996 void
1997 bgp_print(const u_char *dat, int length)
1998 {
1999 const u_char *p;
2000 const u_char *ep;
2001 const u_char *start;
2002 const u_char marker[] = {
2003 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
2004 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
2005 };
2006 struct bgp bgp;
2007 u_int16_t hlen;
2008 char tokbuf[TOKBUFSIZE];
2009
2010 ep = dat + length;
2011 if (snapend < dat + length)
2012 ep = snapend;
2013
2014 printf(": BGP, length: %u",length);
2015
2016 if (vflag < 1) /* lets be less chatty */
2017 return;
2018
2019 p = dat;
2020 start = p;
2021 while (p < ep) {
2022 if (!TTEST2(p[0], 1))
2023 break;
2024 if (p[0] != 0xff) {
2025 p++;
2026 continue;
2027 }
2028
2029 if (!TTEST2(p[0], sizeof(marker)))
2030 break;
2031 if (memcmp(p, marker, sizeof(marker)) != 0) {
2032 p++;
2033 continue;
2034 }
2035
2036 /* found BGP header */
2037 TCHECK2(p[0], BGP_SIZE); /*XXX*/
2038 memcpy(&bgp, p, BGP_SIZE);
2039
2040 if (start != p)
2041 printf(" [|BGP]");
2042
2043 hlen = ntohs(bgp.bgp_len);
2044 if (hlen < BGP_SIZE) {
2045 printf("\n[|BGP Bogus header length %u < %u]", hlen,
2046 BGP_SIZE);
2047 break;
2048 }
2049
2050 if (TTEST2(p[0], hlen)) {
2051 if (!bgp_header_print(p, hlen))
2052 return;
2053 p += hlen;
2054 start = p;
2055 } else {
2056 printf("\n[|BGP %s]",
2057 tok2strbuf(bgp_msg_values,
2058 "Unknown Message Type",
2059 bgp.bgp_type,
2060 tokbuf, sizeof(tokbuf)));
2061 break;
2062 }
2063 }
2064
2065 return;
2066
2067 trunc:
2068 printf(" [|BGP]");
2069 }
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