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use new tok2strbuf() API.
[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 1.82 2004-04-29 02:16:01 mcr 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 "addrtoname.h"
49 #include "extract.h"
50
51 struct bgp {
52 u_int8_t bgp_marker[16];
53 u_int16_t bgp_len;
54 u_int8_t bgp_type;
55 };
56 #define BGP_SIZE 19 /* unaligned */
57
58 #define BGP_OPEN 1
59 #define BGP_UPDATE 2
60 #define BGP_NOTIFICATION 3
61 #define BGP_KEEPALIVE 4
62 #define BGP_ROUTE_REFRESH 5
63
64 static struct tok bgp_msg_values[] = {
65 { BGP_OPEN, "Open"},
66 { BGP_UPDATE, "Update"},
67 { BGP_NOTIFICATION, "Notification"},
68 { BGP_KEEPALIVE, "Keepalive"},
69 { BGP_ROUTE_REFRESH, "Route Refresh"},
70 { 0, NULL}
71 };
72
73 struct bgp_open {
74 u_int8_t bgpo_marker[16];
75 u_int16_t bgpo_len;
76 u_int8_t bgpo_type;
77 u_int8_t bgpo_version;
78 u_int16_t bgpo_myas;
79 u_int16_t bgpo_holdtime;
80 u_int32_t bgpo_id;
81 u_int8_t bgpo_optlen;
82 /* options should follow */
83 };
84 #define BGP_OPEN_SIZE 29 /* unaligned */
85
86 struct bgp_opt {
87 u_int8_t bgpopt_type;
88 u_int8_t bgpopt_len;
89 /* variable length */
90 };
91 #define BGP_OPT_SIZE 2 /* some compilers may pad to 4 bytes */
92
93 struct bgp_notification {
94 u_int8_t bgpn_marker[16];
95 u_int16_t bgpn_len;
96 u_int8_t bgpn_type;
97 u_int8_t bgpn_major;
98 u_int8_t bgpn_minor;
99 };
100 #define BGP_NOTIFICATION_SIZE 21 /* unaligned */
101
102 struct bgp_route_refresh {
103 u_int8_t bgp_marker[16];
104 u_int16_t len;
105 u_int8_t type;
106 u_int8_t afi[2]; /* the compiler messes this structure up */
107 u_int8_t res; /* when doing misaligned sequences of int8 and int16 */
108 u_int8_t safi; /* afi should be int16 - so we have to access it using */
109 }; /* EXTRACT_16BITS(&bgp_route_refresh->afi) (sigh) */
110 #define BGP_ROUTE_REFRESH_SIZE 23
111
112 struct bgp_attr {
113 u_int8_t bgpa_flags;
114 u_int8_t bgpa_type;
115 union {
116 u_int8_t len;
117 u_int16_t elen;
118 } bgpa_len;
119 #define bgp_attr_len(p) \
120 (((p)->bgpa_flags & 0x10) ? \
121 EXTRACT_16BITS(&(p)->bgpa_len.elen) : (p)->bgpa_len.len)
122 #define bgp_attr_off(p) \
123 (((p)->bgpa_flags & 0x10) ? 4 : 3)
124 };
125
126 #define BGPTYPE_ORIGIN 1
127 #define BGPTYPE_AS_PATH 2
128 #define BGPTYPE_NEXT_HOP 3
129 #define BGPTYPE_MULTI_EXIT_DISC 4
130 #define BGPTYPE_LOCAL_PREF 5
131 #define BGPTYPE_ATOMIC_AGGREGATE 6
132 #define BGPTYPE_AGGREGATOR 7
133 #define BGPTYPE_COMMUNITIES 8 /* RFC1997 */
134 #define BGPTYPE_ORIGINATOR_ID 9 /* RFC1998 */
135 #define BGPTYPE_CLUSTER_LIST 10 /* RFC1998 */
136 #define BGPTYPE_DPA 11 /* draft-ietf-idr-bgp-dpa */
137 #define BGPTYPE_ADVERTISERS 12 /* RFC1863 */
138 #define BGPTYPE_RCID_PATH 13 /* RFC1863 */
139 #define BGPTYPE_MP_REACH_NLRI 14 /* RFC2283 */
140 #define BGPTYPE_MP_UNREACH_NLRI 15 /* RFC2283 */
141 #define BGPTYPE_EXTD_COMMUNITIES 16 /* draft-ietf-idr-bgp-ext-communities */
142 #define BGPTYPE_ATTR_SET 128 /* draft-marques-ppvpn-ibgp */
143
144 static struct tok bgp_attr_values[] = {
145 { BGPTYPE_ORIGIN, "Origin"},
146 { BGPTYPE_AS_PATH, "AS Path"},
147 { BGPTYPE_NEXT_HOP, "Next Hop"},
148 { BGPTYPE_MULTI_EXIT_DISC, "Multi Exit Discriminator"},
149 { BGPTYPE_LOCAL_PREF, "Local Preference"},
150 { BGPTYPE_ATOMIC_AGGREGATE, "Atomic Aggregate"},
151 { BGPTYPE_AGGREGATOR, "Aggregator"},
152 { BGPTYPE_COMMUNITIES, "Community"},
153 { BGPTYPE_ORIGINATOR_ID, "Originator ID"},
154 { BGPTYPE_CLUSTER_LIST, "Cluster List"},
155 { BGPTYPE_DPA, "DPA"},
156 { BGPTYPE_ADVERTISERS, "Advertisers"},
157 { BGPTYPE_RCID_PATH, "RCID Path / Cluster ID"},
158 { BGPTYPE_MP_REACH_NLRI, "Multi-Protocol Reach NLRI"},
159 { BGPTYPE_MP_UNREACH_NLRI, "Multi-Protocol Unreach NLRI"},
160 { BGPTYPE_EXTD_COMMUNITIES, "Extended Community"},
161 { BGPTYPE_ATTR_SET, "Attribute Set"},
162 { 255, "Reserved for development"},
163 { 0, NULL}
164 };
165
166 #define BGP_AS_SET 1
167 #define BGP_AS_SEQUENCE 2
168 #define BGP_CONFED_AS_SEQUENCE 3 /* draft-ietf-idr-rfc3065bis-01 */
169 #define BGP_CONFED_AS_SET 4 /* draft-ietf-idr-rfc3065bis-01 */
170
171 static struct tok bgp_as_path_segment_open_values[] = {
172 { BGP_AS_SEQUENCE, ""},
173 { BGP_AS_SET, "{ "},
174 { BGP_CONFED_AS_SEQUENCE, "( "},
175 { BGP_CONFED_AS_SET, "({ "},
176 { 0, NULL}
177 };
178
179 static struct tok bgp_as_path_segment_close_values[] = {
180 { BGP_AS_SEQUENCE, ""},
181 { BGP_AS_SET, "}"},
182 { BGP_CONFED_AS_SEQUENCE, ")"},
183 { BGP_CONFED_AS_SET, "})"},
184 { 0, NULL}
185 };
186
187 #define BGP_OPT_AUTH 1
188 #define BGP_OPT_CAP 2
189
190
191 static struct tok bgp_opt_values[] = {
192 { BGP_OPT_AUTH, "Authentication Information"},
193 { BGP_OPT_CAP, "Capabilities Advertisement"},
194 { 0, NULL}
195 };
196
197 #define BGP_CAPCODE_MP 1
198 #define BGP_CAPCODE_RR 2
199 #define BGP_CAPCODE_ORF 3 /* XXX */
200 #define BGP_CAPCODE_RESTART 64 /* draft-ietf-idr-restart-05 */
201 #define BGP_CAPCODE_AS_NEW 65 /* XXX */
202 #define BGP_CAPCODE_DYN_CAP 67 /* XXX */
203 #define BGP_CAPCODE_RR_CISCO 128
204
205 static struct tok bgp_capcode_values[] = {
206 { BGP_CAPCODE_MP, "Multiprotocol Extensions"},
207 { BGP_CAPCODE_RR, "Route Refresh"},
208 { BGP_CAPCODE_ORF, "Cooperative Route Filtering"},
209 { BGP_CAPCODE_RESTART, "Graceful Restart"},
210 { BGP_CAPCODE_AS_NEW, "32-Bit AS Number"},
211 { BGP_CAPCODE_DYN_CAP, "Dynamic Capability"},
212 { BGP_CAPCODE_RR_CISCO, "Route Refresh (Cisco)"},
213 { 0, NULL}
214 };
215
216 #define BGP_NOTIFY_MAJOR_MSG 1
217 #define BGP_NOTIFY_MAJOR_OPEN 2
218 #define BGP_NOTIFY_MAJOR_UPDATE 3
219 #define BGP_NOTIFY_MAJOR_HOLDTIME 4
220 #define BGP_NOTIFY_MAJOR_FSM 5
221 #define BGP_NOTIFY_MAJOR_CEASE 6
222 #define BGP_NOTIFY_MAJOR_CAP 7
223
224 static struct tok bgp_notify_major_values[] = {
225 { BGP_NOTIFY_MAJOR_MSG, "Message Header Error"},
226 { BGP_NOTIFY_MAJOR_OPEN, "OPEN Message Error"},
227 { BGP_NOTIFY_MAJOR_UPDATE, "UPDATE Message Error"},
228 { BGP_NOTIFY_MAJOR_HOLDTIME,"Hold Timer Expired"},
229 { BGP_NOTIFY_MAJOR_FSM, "Finite State Machine Error"},
230 { BGP_NOTIFY_MAJOR_CEASE, "Cease"},
231 { BGP_NOTIFY_MAJOR_CAP, "Capability Message Error"},
232 { 0, NULL}
233 };
234
235 /* draft-ietf-idr-cease-subcode-02 */
236 #define BGP_NOTIFY_MINOR_CEASE_MAXPRFX 1
237 static struct tok bgp_notify_minor_cease_values[] = {
238 { BGP_NOTIFY_MINOR_CEASE_MAXPRFX, "Maximum Number of Prefixes Reached"},
239 { 2, "Administratively Shutdown"},
240 { 3, "Peer Unconfigured"},
241 { 4, "Administratively Reset"},
242 { 5, "Connection Rejected"},
243 { 6, "Other Configuration Change"},
244 { 7, "Connection Collision Resolution"},
245 { 0, NULL}
246 };
247
248 static struct tok bgp_notify_minor_msg_values[] = {
249 { 1, "Connection Not Synchronized"},
250 { 2, "Bad Message Length"},
251 { 3, "Bad Message Type"},
252 { 0, NULL}
253 };
254
255 static struct tok bgp_notify_minor_open_values[] = {
256 { 1, "Unsupported Version Number"},
257 { 2, "Bad Peer AS"},
258 { 3, "Bad BGP Identifier"},
259 { 4, "Unsupported Optional Parameter"},
260 { 5, "Authentication Failure"},
261 { 6, "Unacceptable Hold Time"},
262 { 0, NULL}
263 };
264
265 static struct tok bgp_notify_minor_update_values[] = {
266 { 1, "Malformed Attribute List"},
267 { 2, "Unrecognized Well-known Attribute"},
268 { 3, "Missing Well-known Attribute"},
269 { 4, "Attribute Flags Error"},
270 { 5, "Attribute Length Error"},
271 { 6, "Invalid ORIGIN Attribute"},
272 { 7, "AS Routing Loop"},
273 { 8, "Invalid NEXT_HOP Attribute"},
274 { 9, "Optional Attribute Error"},
275 { 10, "Invalid Network Field"},
276 { 11, "Malformed AS_PATH"},
277 { 0, NULL}
278 };
279
280 static struct tok bgp_notify_minor_cap_values[] = {
281 { 1, "Invalid Action Value" },
282 { 2, "Invalid Capability Length" },
283 { 3, "Malformed Capability Value" },
284 { 4, "Unsupported Capability Code" },
285 { 0, NULL }
286 };
287
288 static struct tok bgp_origin_values[] = {
289 { 0, "IGP"},
290 { 1, "EGP"},
291 { 2, "Incomplete"},
292 { 0, NULL}
293 };
294
295 /* Subsequent address family identifier, RFC2283 section 7 */
296 #define SAFNUM_RES 0
297 #define SAFNUM_UNICAST 1
298 #define SAFNUM_MULTICAST 2
299 #define SAFNUM_UNIMULTICAST 3
300 /* labeled BGP RFC3107 */
301 #define SAFNUM_LABUNICAST 4
302 #define SAFNUM_TUNNEL 64 /* XXX */
303 #define SAFNUM_VPLS 65 /* XXX */
304 #define SAFNUM_MDT 66 /* XXX */
305 /* Section 4.3.4 of draft-rosen-rfc2547bis-03.txt */
306 #define SAFNUM_VPNUNICAST 128
307 #define SAFNUM_VPNMULTICAST 129
308 #define SAFNUM_VPNUNIMULTICAST 130
309 /* draft-marques-ppvpn-rt-constrain-01.txt */
310 #define SAFNUM_RT_ROUTING_INFO 132
311
312 #define BGP_VPN_RD_LEN 8
313
314 static struct tok bgp_safi_values[] = {
315 { SAFNUM_RES, "Reserved"},
316 { SAFNUM_UNICAST, "Unicast"},
317 { SAFNUM_MULTICAST, "Multicast"},
318 { SAFNUM_UNIMULTICAST, "Unicast+Multicast"},
319 { SAFNUM_LABUNICAST, "labeled Unicast"},
320 { SAFNUM_TUNNEL, "Tunnel"},
321 { SAFNUM_VPLS, "VPLS"},
322 { SAFNUM_MDT, "MDT"},
323 { SAFNUM_VPNUNICAST, "labeled VPN Unicast"},
324 { SAFNUM_VPNMULTICAST, "labeled VPN Multicast"},
325 { SAFNUM_VPNUNIMULTICAST, "labeled VPN Unicast+Multicast"},
326 { SAFNUM_RT_ROUTING_INFO, "Route Target Routing Information"}, /* draft-marques-ppvpn-rt-constrain-01.txt */
327 { 0, NULL }
328 };
329
330 /* well-known community */
331 #define BGP_COMMUNITY_NO_EXPORT 0xffffff01
332 #define BGP_COMMUNITY_NO_ADVERT 0xffffff02
333 #define BGP_COMMUNITY_NO_EXPORT_SUBCONFED 0xffffff03
334
335 /* RFC1700 address family numbers */
336 #define AFNUM_INET 1
337 #define AFNUM_INET6 2
338 #define AFNUM_NSAP 3
339 #define AFNUM_HDLC 4
340 #define AFNUM_BBN1822 5
341 #define AFNUM_802 6
342 #define AFNUM_E163 7
343 #define AFNUM_E164 8
344 #define AFNUM_F69 9
345 #define AFNUM_X121 10
346 #define AFNUM_IPX 11
347 #define AFNUM_ATALK 12
348 #define AFNUM_DECNET 13
349 #define AFNUM_BANYAN 14
350 #define AFNUM_E164NSAP 15
351 /* draft-kompella-ppvpn-l2vpn */
352 #define AFNUM_L2VPN 196 /* still to be approved by IANA */
353
354 static struct tok bgp_afi_values[] = {
355 { 0, "Reserved"},
356 { AFNUM_INET, "IPv4"},
357 { AFNUM_INET6, "IPv6"},
358 { AFNUM_NSAP, "NSAP"},
359 { AFNUM_HDLC, "HDLC"},
360 { AFNUM_BBN1822, "BBN 1822"},
361 { AFNUM_802, "802"},
362 { AFNUM_E163, "E.163"},
363 { AFNUM_E164, "E.164"},
364 { AFNUM_F69, "F.69"},
365 { AFNUM_X121, "X.121"},
366 { AFNUM_IPX, "Novell IPX"},
367 { AFNUM_ATALK, "Appletalk"},
368 { AFNUM_DECNET, "Decnet IV"},
369 { AFNUM_BANYAN, "Banyan Vines"},
370 { AFNUM_E164NSAP, "E.164 with NSAP subaddress"},
371 { AFNUM_L2VPN, "Layer-2 VPN"},
372 { 0, NULL},
373 };
374
375 /* Extended community type - draft-ietf-idr-bgp-ext-communities-05 */
376 #define BGP_EXT_COM_RT_0 0x0002 /* Route Target,Format AS(2bytes):AN(4bytes) */
377 #define BGP_EXT_COM_RT_1 0x0102 /* Route Target,Format IP address:AN(2bytes) */
378 #define BGP_EXT_COM_RT_2 0x0202 /* Route Target,Format AN(4bytes):local(2bytes) */
379 #define BGP_EXT_COM_RO_0 0x0003 /* Route Origin,Format AS(2bytes):AN(4bytes) */
380 #define BGP_EXT_COM_RO_1 0x0103 /* Route Origin,Format IP address:AN(2bytes) */
381 #define BGP_EXT_COM_RO_2 0x0203 /* Route Origin,Format AN(4bytes):local(2bytes) */
382 #define BGP_EXT_COM_LINKBAND 0x4004 /* Link Bandwidth,Format AS(2B):Bandwidth(4B) */
383 /* rfc2547 bgp-mpls-vpns */
384 #define BGP_EXT_COM_CISCO_MCAST 0x0009 /* cisco proprietary */
385
386 #define BGP_EXT_COM_VPN_ORIGIN 0x0005 /* OSPF Domain ID / VPN of Origin - draft-rosen-vpns-ospf-bgp-mpls */
387 #define BGP_EXT_COM_VPN_ORIGIN2 0x0105 /* duplicate - keep for backwards compatability */
388 #define BGP_EXT_COM_VPN_ORIGIN3 0x0205 /* duplicate - keep for backwards compatability */
389 #define BGP_EXT_COM_VPN_ORIGIN4 0x8005 /* duplicate - keep for backwards compatability */
390
391 #define BGP_EXT_COM_OSPF_RTYPE 0x0306 /* OSPF Route Type,Format Area(4B):RouteType(1B):Options(1B) */
392 #define BGP_EXT_COM_OSPF_RTYPE2 0x8000 /* duplicate - keep for backwards compatability */
393
394 #define BGP_EXT_COM_OSPF_RID 0x0107 /* OSPF Router ID,Format RouterID(4B):Unused(2B) */
395 #define BGP_EXT_COM_OSPF_RID2 0x8001 /* duplicate - keep for backwards compatability */
396
397 #define BGP_EXT_COM_L2INFO 0x800a /* draft-kompella-ppvpn-l2vpn */
398
399 static struct tok bgp_extd_comm_flag_values[] = {
400 { 0x8000, "vendor-specific"},
401 { 0x4000, "non-transitive"},
402 { 0, NULL},
403 };
404
405 static struct tok bgp_extd_comm_subtype_values[] = {
406 { BGP_EXT_COM_RT_0, "target"},
407 { BGP_EXT_COM_RT_1, "target"},
408 { BGP_EXT_COM_RT_2, "target"},
409 { BGP_EXT_COM_RO_0, "origin"},
410 { BGP_EXT_COM_RO_1, "origin"},
411 { BGP_EXT_COM_RO_2, "origin"},
412 { BGP_EXT_COM_LINKBAND, "link-BW"},
413 { BGP_EXT_COM_CISCO_MCAST, "mdt-group"},
414 { BGP_EXT_COM_VPN_ORIGIN, "ospf-domain"},
415 { BGP_EXT_COM_VPN_ORIGIN2, "ospf-domain"},
416 { BGP_EXT_COM_VPN_ORIGIN3, "ospf-domain"},
417 { BGP_EXT_COM_VPN_ORIGIN4, "ospf-domain"},
418 { BGP_EXT_COM_OSPF_RTYPE, "ospf-route-type"},
419 { BGP_EXT_COM_OSPF_RTYPE2, "ospf-route-type"},
420 { BGP_EXT_COM_OSPF_RID, "ospf-router-id"},
421 { BGP_EXT_COM_OSPF_RID2, "ospf-router-id"},
422 { BGP_EXT_COM_L2INFO, "layer2-info"},
423 { 0, NULL},
424 };
425
426 /* OSPF codes for BGP_EXT_COM_OSPF_RTYPE draft-rosen-vpns-ospf-bgp-mpls */
427 #define BGP_OSPF_RTYPE_RTR 1 /* OSPF Router LSA */
428 #define BGP_OSPF_RTYPE_NET 2 /* OSPF Network LSA */
429 #define BGP_OSPF_RTYPE_SUM 3 /* OSPF Summary LSA */
430 #define BGP_OSPF_RTYPE_EXT 5 /* OSPF External LSA, note that ASBR doesn't apply to MPLS-VPN */
431 #define BGP_OSPF_RTYPE_NSSA 7 /* OSPF NSSA External*/
432 #define BGP_OSPF_RTYPE_SHAM 129 /* OSPF-MPLS-VPN Sham link */
433 #define BGP_OSPF_RTYPE_METRIC_TYPE 0x1 /* LSB of RTYPE Options Field */
434
435 static struct tok bgp_extd_comm_ospf_rtype_values[] = {
436 { BGP_OSPF_RTYPE_RTR, "Router" },
437 { BGP_OSPF_RTYPE_NET, "Network" },
438 { BGP_OSPF_RTYPE_SUM, "Summary" },
439 { BGP_OSPF_RTYPE_EXT, "External" },
440 { BGP_OSPF_RTYPE_NSSA,"NSSA External" },
441 { BGP_OSPF_RTYPE_SHAM,"MPLS-VPN Sham" },
442 { 0, NULL },
443 };
444
445 static struct tok bgp_l2vpn_encaps_values[] = {
446 { 0, "Reserved"},
447 { 1, "Frame Relay"},
448 { 2, "ATM AAL5 VCC transport"},
449 { 3, "ATM transparent cell transport"},
450 { 4, "Ethernet VLAN"},
451 { 5, "Ethernet"},
452 { 6, "Cisco-HDLC"},
453 { 7, "PPP"},
454 { 8, "CEM"},
455 { 9, "ATM VCC cell transport"},
456 { 10, "ATM VPC cell transport"},
457 { 11, "MPLS"},
458 { 12, "VPLS"},
459 { 64, "IP-interworking"},
460 { 0, NULL},
461 };
462
463 static int
464 decode_prefix4(const u_char *pptr, char *buf, u_int buflen)
465 {
466 struct in_addr addr;
467 u_int plen;
468
469 TCHECK(pptr[0]);
470 plen = pptr[0];
471 if (32 < plen)
472 return -1;
473
474 memset(&addr, 0, sizeof(addr));
475 TCHECK2(pptr[1], (plen + 7) / 8);
476 memcpy(&addr, &pptr[1], (plen + 7) / 8);
477 if (plen % 8) {
478 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
479 ((0xff00 >> (plen % 8)) & 0xff);
480 }
481 snprintf(buf, buflen, "%s/%d", getname((u_char *)&addr), plen);
482 return 1 + (plen + 7) / 8;
483
484 trunc:
485 return -2;
486 }
487
488 static int
489 decode_labeled_prefix4(const u_char *pptr, char *buf, u_int buflen)
490 {
491 struct in_addr addr;
492 u_int plen;
493
494 TCHECK(pptr[0]);
495 plen = pptr[0]; /* get prefix length */
496
497 /* this is one of the weirdnesses of rfc3107
498 the label length (actually the label + COS bits)
499 is added to the prefix length;
500 we also do only read out just one label -
501 there is no real application for advertisement of
502 stacked labels in a a single BGP message
503 */
504
505 plen-=24; /* adjust prefixlen - labellength */
506
507 if (32 < plen)
508 return -1;
509
510 memset(&addr, 0, sizeof(addr));
511 TCHECK2(pptr[4], (plen + 7) / 8);
512 memcpy(&addr, &pptr[4], (plen + 7) / 8);
513 if (plen % 8) {
514 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
515 ((0xff00 >> (plen % 8)) & 0xff);
516 }
517 /* the label may get offsetted by 4 bits so lets shift it right */
518 snprintf(buf, buflen, "%s/%d, label:%u %s",
519 getname((u_char *)&addr),
520 plen,
521 EXTRACT_24BITS(pptr+1)>>4,
522 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
523
524 return 4 + (plen + 7) / 8;
525
526 trunc:
527 return -2;
528 }
529
530 /* RDs and RTs share the same semantics
531 * we use bgp_vpn_rd_print for
532 * printing route targets inside a NLRI */
533 static char *
534 bgp_vpn_rd_print (const u_char *pptr) {
535
536 /* allocate space for the largest possible string */
537 static char rd[sizeof("xxxxxxxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")];
538 char *pos = rd;
539
540 /* ok lets load the RD format */
541 switch (EXTRACT_16BITS(pptr)) {
542
543 /* AS:IP-address fmt*/
544 case 0:
545 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u.%u.%u.%u",
546 EXTRACT_16BITS(pptr+2), *(pptr+4), *(pptr+5), *(pptr+6), *(pptr+7));
547 break;
548 /* IP-address:AS fmt*/
549
550 case 1:
551 snprintf(pos, sizeof(rd) - (pos - rd), "%u.%u.%u.%u:%u",
552 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
553 break;
554
555 /* 4-byte-AS:number fmt*/
556 case 2:
557 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u (%u.%u.%u.%u:%u)",
558 EXTRACT_32BITS(pptr+2), EXTRACT_16BITS(pptr+6),
559 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
560 break;
561 default:
562 snprintf(pos, sizeof(rd) - (pos - rd), "unknown RD format");
563 break;
564 }
565 pos += strlen(pos);
566 *(pos) = '\0';
567 return (rd);
568 }
569
570 static int
571 decode_rt_routing_info(const u_char *pptr, char *buf, u_int buflen)
572 {
573 u_int8_t route_target[8];
574 u_int plen;
575
576 TCHECK(pptr[0]);
577 plen = pptr[0]; /* get prefix length */
578
579 plen-=32; /* adjust prefix length */
580
581 if (0 < plen)
582 return -1;
583
584 memset(&route_target, 0, sizeof(route_target));
585 TCHECK2(pptr[1], (plen + 7) / 8);
586 memcpy(&route_target, &pptr[1], (plen + 7) / 8);
587 if (plen % 8) {
588 ((u_char *)&route_target)[(plen + 7) / 8 - 1] &=
589 ((0xff00 >> (plen % 8)) & 0xff);
590 }
591 snprintf(buf, buflen, "origin AS: %u, route target %s",
592 EXTRACT_32BITS(pptr+1),
593 bgp_vpn_rd_print((u_char *)&route_target));
594
595 return 5 + (plen + 7) / 8;
596
597 trunc:
598 return -2;
599 }
600
601 static int
602 decode_labeled_vpn_prefix4(const u_char *pptr, char *buf, u_int buflen)
603 {
604 struct in_addr addr;
605 u_int plen;
606
607 TCHECK(pptr[0]);
608 plen = pptr[0]; /* get prefix length */
609
610 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
611
612 if (32 < plen)
613 return -1;
614
615 memset(&addr, 0, sizeof(addr));
616 TCHECK2(pptr[12], (plen + 7) / 8);
617 memcpy(&addr, &pptr[12], (plen + 7) / 8);
618 if (plen % 8) {
619 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
620 ((0xff00 >> (plen % 8)) & 0xff);
621 }
622 /* the label may get offsetted by 4 bits so lets shift it right */
623 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
624 bgp_vpn_rd_print(pptr+4),
625 getname((u_char *)&addr),
626 plen,
627 EXTRACT_24BITS(pptr+1)>>4,
628 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
629
630 return 12 + (plen + 7) / 8;
631
632 trunc:
633 return -2;
634 }
635
636 static int
637 decode_labeled_vpn_l2(const u_char *pptr, char *buf, u_int buflen)
638 {
639 int plen,tlen,strlen,tlv_type,tlv_len,ttlv_len;
640
641 TCHECK2(pptr[0], 2);
642 plen=EXTRACT_16BITS(pptr);
643 tlen=plen;
644 pptr+=2;
645 TCHECK2(pptr[0],15);
646 strlen=snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u",
647 bgp_vpn_rd_print(pptr),
648 EXTRACT_16BITS(pptr+8),
649 EXTRACT_16BITS(pptr+10),
650 EXTRACT_24BITS(pptr+12)>>4); /* the label is offsetted by 4 bits so lets shift it right */
651 pptr+=15;
652 tlen-=15;
653
654 /* ok now the variable part - lets read out TLVs*/
655 while (tlen>0) {
656 if (tlen < 3)
657 return -1;
658 TCHECK2(pptr[0], 3);
659 tlv_type=*pptr++;
660 tlv_len=EXTRACT_16BITS(pptr);
661 ttlv_len=tlv_len;
662 pptr+=2;
663
664 switch(tlv_type) {
665 case 1:
666 strlen+=snprintf(buf+strlen,buflen-strlen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
667 tlv_type,
668 tlv_len);
669 ttlv_len=ttlv_len/8+1; /* how many bytes do we need to read ? */
670 while (ttlv_len>0) {
671 TCHECK(pptr[0]);
672 strlen+=snprintf(buf+strlen,buflen-strlen, "%02x",*pptr++);
673 ttlv_len--;
674 }
675 break;
676 default:
677 snprintf(buf+strlen,buflen-strlen, "\n\t\tunknown TLV #%u, length: %u",
678 tlv_type,
679 tlv_len);
680 break;
681 }
682 tlen-=(tlv_len<<3); /* the tlv-length is expressed in bits so lets shift it tright */
683 }
684 return plen+2;
685
686 trunc:
687 return -2;
688 }
689
690 #ifdef INET6
691 static int
692 decode_prefix6(const u_char *pd, char *buf, u_int buflen)
693 {
694 struct in6_addr addr;
695 u_int plen;
696
697 TCHECK(pd[0]);
698 plen = pd[0];
699 if (128 < plen)
700 return -1;
701
702 memset(&addr, 0, sizeof(addr));
703 TCHECK2(pd[1], (plen + 7) / 8);
704 memcpy(&addr, &pd[1], (plen + 7) / 8);
705 if (plen % 8) {
706 addr.s6_addr[(plen + 7) / 8 - 1] &=
707 ((0xff00 >> (plen % 8)) & 0xff);
708 }
709 snprintf(buf, buflen, "%s/%d", getname6((u_char *)&addr), plen);
710 return 1 + (plen + 7) / 8;
711
712 trunc:
713 return -2;
714 }
715
716 static int
717 decode_labeled_prefix6(const u_char *pptr, char *buf, u_int buflen)
718 {
719 struct in6_addr addr;
720 u_int plen;
721
722 TCHECK(pptr[0]);
723 plen = pptr[0]; /* get prefix length */
724 plen-=24; /* adjust prefixlen - labellength */
725
726 if (128 < plen)
727 return -1;
728
729 memset(&addr, 0, sizeof(addr));
730 TCHECK2(pptr[4], (plen + 7) / 8);
731 memcpy(&addr, &pptr[4], (plen + 7) / 8);
732 if (plen % 8) {
733 addr.s6_addr[(plen + 7) / 8 - 1] &=
734 ((0xff00 >> (plen % 8)) & 0xff);
735 }
736 /* the label may get offsetted by 4 bits so lets shift it right */
737 snprintf(buf, buflen, "%s/%d, label:%u %s",
738 getname6((u_char *)&addr),
739 plen,
740 EXTRACT_24BITS(pptr+1)>>4,
741 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
742
743 return 4 + (plen + 7) / 8;
744
745 trunc:
746 return -2;
747 }
748
749 static int
750 decode_labeled_vpn_prefix6(const u_char *pptr, char *buf, u_int buflen)
751 {
752 struct in6_addr addr;
753 u_int plen;
754
755 TCHECK(pptr[0]);
756 plen = pptr[0]; /* get prefix length */
757
758 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
759
760 if (128 < plen)
761 return -1;
762
763 memset(&addr, 0, sizeof(addr));
764 TCHECK2(pptr[12], (plen + 7) / 8);
765 memcpy(&addr, &pptr[12], (plen + 7) / 8);
766 if (plen % 8) {
767 addr.s6_addr[(plen + 7) / 8 - 1] &=
768 ((0xff00 >> (plen % 8)) & 0xff);
769 }
770 /* the label may get offsetted by 4 bits so lets shift it right */
771 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
772 bgp_vpn_rd_print(pptr+4),
773 getname6((u_char *)&addr),
774 plen,
775 EXTRACT_24BITS(pptr+1)>>4,
776 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
777
778 return 12 + (plen + 7) / 8;
779
780 trunc:
781 return -2;
782 }
783 #endif
784
785 static int
786 bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len)
787 {
788 int i;
789 u_int16_t af;
790 u_int8_t safi, snpa;
791 union { /* copy buffer for bandwidth values */
792 float f;
793 u_int32_t i;
794 } bw;
795 int advance;
796 int tlen;
797 const u_char *tptr;
798 char buf[MAXHOSTNAMELEN + 100];
799 char tokbuf[TOKBUFSIZE];
800
801 tptr = pptr;
802 tlen=len;
803
804 switch (attr->bgpa_type) {
805 case BGPTYPE_ORIGIN:
806 if (len != 1)
807 printf("invalid len");
808 else {
809 TCHECK(*tptr);
810 printf("%s", tok2strbuf(bgp_origin_values,
811 "Unknown Origin Typecode",
812 tptr[0],
813 tokbuf, sizeof(tokbuf)));
814 }
815 break;
816
817 case BGPTYPE_AS_PATH:
818 if (len % 2) {
819 printf("invalid len");
820 break;
821 }
822 if (!len) {
823 printf("empty");
824 break;
825 }
826
827 while (tptr < pptr + len) {
828 TCHECK(tptr[0]);
829 printf("%s", tok2strbuf(bgp_as_path_segment_open_values,
830 "?", tptr[0],
831 tokbuf, sizeof(tokbuf)));
832 for (i = 0; i < tptr[1] * 2; i += 2) {
833 TCHECK2(tptr[2 + i], 2);
834 printf("%u ", EXTRACT_16BITS(&tptr[2 + i]));
835 }
836 TCHECK(tptr[0]);
837 printf("%s", tok2strbuf(bgp_as_path_segment_close_values,
838 "?", tptr[0],
839 tokbuf, sizeof(tokbuf)));
840 TCHECK(tptr[1]);
841 tptr += 2 + tptr[1] * 2;
842 }
843 break;
844 case BGPTYPE_NEXT_HOP:
845 if (len != 4)
846 printf("invalid len");
847 else {
848 TCHECK2(tptr[0], 4);
849 printf("%s", getname(tptr));
850 }
851 break;
852 case BGPTYPE_MULTI_EXIT_DISC:
853 case BGPTYPE_LOCAL_PREF:
854 if (len != 4)
855 printf("invalid len");
856 else {
857 TCHECK2(tptr[0], 4);
858 printf("%u", EXTRACT_32BITS(tptr));
859 }
860 break;
861 case BGPTYPE_ATOMIC_AGGREGATE:
862 if (len != 0)
863 printf("invalid len");
864 break;
865 case BGPTYPE_AGGREGATOR:
866 if (len != 6) {
867 printf("invalid len");
868 break;
869 }
870 TCHECK2(tptr[0], 6);
871 printf(" AS #%u, origin %s", EXTRACT_16BITS(tptr),
872 getname(tptr + 2));
873 break;
874 case BGPTYPE_COMMUNITIES:
875 if (len % 4) {
876 printf("invalid len");
877 break;
878 }
879 while (tlen>0) {
880 u_int32_t comm;
881 TCHECK2(tptr[0], 4);
882 comm = EXTRACT_32BITS(tptr);
883 switch (comm) {
884 case BGP_COMMUNITY_NO_EXPORT:
885 printf(" NO_EXPORT");
886 break;
887 case BGP_COMMUNITY_NO_ADVERT:
888 printf(" NO_ADVERTISE");
889 break;
890 case BGP_COMMUNITY_NO_EXPORT_SUBCONFED:
891 printf(" NO_EXPORT_SUBCONFED");
892 break;
893 default:
894 printf("%u:%u%s",
895 (comm >> 16) & 0xffff,
896 comm & 0xffff,
897 (tlen>4) ? ", " : "");
898 break;
899 }
900 tlen -=4;
901 tptr +=4;
902 }
903 break;
904 case BGPTYPE_ORIGINATOR_ID:
905 if (len != 4) {
906 printf("invalid len");
907 break;
908 }
909 TCHECK2(tptr[0], 4);
910 printf("%s",getname(tptr));
911 break;
912 case BGPTYPE_CLUSTER_LIST:
913 if (len % 4) {
914 printf("invalid len");
915 break;
916 }
917 while (tlen>0) {
918 TCHECK2(tptr[0], 4);
919 printf("%s%s",
920 getname(tptr),
921 (tlen>4) ? ", " : "");
922 tlen -=4;
923 tptr +=4;
924 }
925 break;
926 case BGPTYPE_MP_REACH_NLRI:
927 TCHECK2(tptr[0], 3);
928 af = EXTRACT_16BITS(tptr);
929 safi = tptr[2];
930
931 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
932 tok2strbuf(bgp_afi_values, "Unknown AFI", af,
933 tokbuf, sizeof(tokbuf)),
934 af,
935 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
936 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
937 tokbuf, sizeof(tokbuf)),
938 safi);
939
940 if (af == AFNUM_INET || af==AFNUM_L2VPN)
941 ;
942 #ifdef INET6
943 else if (af == AFNUM_INET6)
944 ;
945 #endif
946 else {
947 printf("\n\t no AFI %u decoder",af);
948 if (vflag <= 1)
949 print_unknown_data(tptr,"\n\t ",tlen);
950 break;
951 }
952
953 tptr +=3;
954
955 TCHECK(tptr[0]);
956 tlen = tptr[0];
957 tptr++;
958
959 if (tlen) {
960 printf("\n\t nexthop: ");
961 while (tlen > 0) {
962 switch (af) {
963 case AFNUM_INET:
964 switch(safi) {
965 case SAFNUM_UNICAST:
966 case SAFNUM_MULTICAST:
967 case SAFNUM_UNIMULTICAST:
968 case SAFNUM_LABUNICAST:
969 case SAFNUM_RT_ROUTING_INFO:
970 if (tlen < (int)sizeof(struct in_addr)) {
971 printf("invalid len");
972 tlen = 0;
973 } else {
974 TCHECK2(tptr[0], sizeof(struct in_addr));
975 printf("%s",getname(tptr));
976 tlen -= sizeof(struct in_addr);
977 tptr += sizeof(struct in_addr);
978 }
979 break;
980 case SAFNUM_VPNUNICAST:
981 case SAFNUM_VPNMULTICAST:
982 case SAFNUM_VPNUNIMULTICAST:
983 if (tlen < (int)(sizeof(struct in_addr)+BGP_VPN_RD_LEN)) {
984 printf("invalid len");
985 tlen = 0;
986 } else {
987 TCHECK2(tptr[0], sizeof(struct in_addr)+BGP_VPN_RD_LEN);
988 printf("RD: %s, %s",
989 bgp_vpn_rd_print(tptr),
990 getname(tptr+BGP_VPN_RD_LEN));
991 tlen -= (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
992 tptr += (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
993 }
994 break;
995 default:
996 TCHECK2(tptr[0], tlen);
997 printf("no SAFI %u decoder",safi);
998 if (vflag <= 1)
999 print_unknown_data(tptr,"\n\t ",tlen);
1000 tptr += tlen;
1001 tlen = 0;
1002 break;
1003 }
1004 break;
1005 #ifdef INET6
1006 case AFNUM_INET6:
1007 switch(safi) {
1008 case SAFNUM_UNICAST:
1009 case SAFNUM_MULTICAST:
1010 case SAFNUM_UNIMULTICAST:
1011 case SAFNUM_LABUNICAST:
1012 case SAFNUM_RT_ROUTING_INFO:
1013 if (tlen < (int)sizeof(struct in6_addr)) {
1014 printf("invalid len");
1015 tlen = 0;
1016 } else {
1017 TCHECK2(tptr[0], sizeof(struct in6_addr));
1018 printf("%s", getname6(tptr));
1019 tlen -= sizeof(struct in6_addr);
1020 tptr += sizeof(struct in6_addr);
1021 }
1022 break;
1023 case SAFNUM_VPNUNICAST:
1024 case SAFNUM_VPNMULTICAST:
1025 case SAFNUM_VPNUNIMULTICAST:
1026 if (tlen < (int)(sizeof(struct in6_addr)+BGP_VPN_RD_LEN)) {
1027 printf("invalid len");
1028 tlen = 0;
1029 } else {
1030 TCHECK2(tptr[0], sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1031 printf("RD: %s, %s",
1032 bgp_vpn_rd_print(tptr),
1033 getname6(tptr+BGP_VPN_RD_LEN));
1034 tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1035 tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1036 }
1037 break;
1038 default:
1039 TCHECK2(tptr[0], tlen);
1040 printf("no SAFI %u decoder",safi);
1041 if (vflag <= 1)
1042 print_unknown_data(tptr,"\n\t ",tlen);
1043 tptr += tlen;
1044 tlen = 0;
1045 break;
1046 }
1047 break;
1048 #endif
1049 case AFNUM_L2VPN:
1050 switch(safi) {
1051 case SAFNUM_VPNUNICAST:
1052 case SAFNUM_VPNMULTICAST:
1053 case SAFNUM_VPNUNIMULTICAST:
1054 if (tlen < (int)sizeof(struct in_addr)) {
1055 printf("invalid len");
1056 tlen = 0;
1057 } else {
1058 TCHECK2(tptr[0], sizeof(struct in_addr));
1059 printf("%s", getname(tptr));
1060 tlen -= (sizeof(struct in_addr));
1061 tptr += (sizeof(struct in_addr));
1062 }
1063 break;
1064 default:
1065 TCHECK2(tptr[0], tlen);
1066 printf("no SAFI %u decoder",safi);
1067 if (vflag <= 1)
1068 print_unknown_data(tptr,"\n\t ",tlen);
1069 tptr += tlen;
1070 tlen = 0;
1071 break;
1072 }
1073 break;
1074
1075 default:
1076 TCHECK2(tptr[0], tlen);
1077 printf("no AFI %u decoder",af);
1078 if (vflag <= 1)
1079 print_unknown_data(tptr,"\n\t ",tlen);
1080 tptr += tlen;
1081 tlen = 0;
1082 break;
1083 }
1084 }
1085 }
1086 tptr += tlen;
1087
1088 TCHECK(tptr[0]);
1089 snpa = tptr[0];
1090 tptr++;
1091
1092 if (snpa) {
1093 printf("\n\t %u SNPA", snpa);
1094 for (/*nothing*/; snpa > 0; snpa--) {
1095 TCHECK(tptr[0]);
1096 printf("\n\t %d bytes", tptr[0]);
1097 tptr += tptr[0] + 1;
1098 }
1099 } else {
1100 printf(", no SNPA");
1101 }
1102
1103 while (len - (tptr - pptr) > 0) {
1104 switch (af) {
1105 case AFNUM_INET:
1106 switch (safi) {
1107 case SAFNUM_UNICAST:
1108 case SAFNUM_MULTICAST:
1109 case SAFNUM_UNIMULTICAST:
1110 advance = decode_prefix4(tptr, buf, sizeof(buf));
1111 if (advance == -1)
1112 printf("\n\t (illegal prefix length)");
1113 else if (advance == -2)
1114 goto trunc;
1115 else
1116 printf("\n\t %s", buf);
1117 break;
1118 case SAFNUM_LABUNICAST:
1119 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1120 if (advance == -1)
1121 printf("\n\t (illegal prefix length)");
1122 else if (advance == -2)
1123 goto trunc;
1124 else
1125 printf("\n\t %s", buf);
1126 break;
1127 case SAFNUM_VPNUNICAST:
1128 case SAFNUM_VPNMULTICAST:
1129 case SAFNUM_VPNUNIMULTICAST:
1130 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1131 if (advance == -1)
1132 printf("\n\t (illegal prefix length)");
1133 else if (advance == -2)
1134 goto trunc;
1135 else
1136 printf("\n\t %s", buf);
1137 break;
1138 case SAFNUM_RT_ROUTING_INFO:
1139 advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1140 if (advance == -1)
1141 printf("\n\t (illegal prefix length)");
1142 else if (advance == -2)
1143 goto trunc;
1144 else
1145 printf("\n\t %s", buf);
1146 break;
1147 default:
1148 TCHECK2(*(tptr-3),tlen);
1149 printf("\n\t no SAFI %u decoder",safi);
1150 if (vflag <= 1)
1151 print_unknown_data(tptr-3,"\n\t ",tlen);
1152 advance = 0;
1153 tptr = pptr + len;
1154 break;
1155 }
1156 break;
1157 #ifdef INET6
1158 case AFNUM_INET6:
1159 switch (safi) {
1160 case SAFNUM_UNICAST:
1161 case SAFNUM_MULTICAST:
1162 case SAFNUM_UNIMULTICAST:
1163 advance = decode_prefix6(tptr, buf, sizeof(buf));
1164 if (advance == -1)
1165 printf("\n\t (illegal prefix length)");
1166 else if (advance == -2)
1167 goto trunc;
1168 else
1169 printf("\n\t %s", buf);
1170 break;
1171 case SAFNUM_LABUNICAST:
1172 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1173 if (advance == -1)
1174 printf("\n\t (illegal prefix length)");
1175 else if (advance == -2)
1176 goto trunc;
1177 else
1178 printf("\n\t %s", buf);
1179 break;
1180 case SAFNUM_VPNUNICAST:
1181 case SAFNUM_VPNMULTICAST:
1182 case SAFNUM_VPNUNIMULTICAST:
1183 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1184 if (advance == -1)
1185 printf("\n\t (illegal prefix length)");
1186 else if (advance == -2)
1187 goto trunc;
1188 else
1189 printf("\n\t %s", buf);
1190 break;
1191 case SAFNUM_RT_ROUTING_INFO:
1192 advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1193 if (advance == -1)
1194 printf("\n\t (illegal prefix length)");
1195 else if (advance == -2)
1196 goto trunc;
1197 else
1198 printf("\n\t %s", buf);
1199 break;
1200 default:
1201 TCHECK2(*(tptr-3),tlen);
1202 printf("\n\t no SAFI %u decoder ",safi);
1203 if (vflag <= 1)
1204 print_unknown_data(tptr-3,"\n\t ",tlen);
1205 advance = 0;
1206 tptr = pptr + len;
1207 break;
1208 }
1209 break;
1210 #endif
1211 case AFNUM_L2VPN:
1212 switch(safi) {
1213 case SAFNUM_VPNUNICAST:
1214 case SAFNUM_VPNMULTICAST:
1215 case SAFNUM_VPNUNIMULTICAST:
1216 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1217 if (advance == -1)
1218 printf("\n\t (illegal length)");
1219 else if (advance == -2)
1220 goto trunc;
1221 else
1222 printf("\n\t %s", buf);
1223 break;
1224 default:
1225 TCHECK2(*tptr,tlen);
1226 printf("no SAFI %u decoder",safi);
1227 if (vflag <= 1)
1228 print_unknown_data(tptr,"\n\t ",tlen);
1229 advance = 0;
1230 tptr = pptr + len;
1231 break;
1232 }
1233 break;
1234
1235
1236 default:
1237 TCHECK2(*(tptr-3),tlen);
1238 printf("\n\t no AFI %u decoder ",af);
1239 if (vflag <= 1)
1240 print_unknown_data(tptr-3,"\n\t ",tlen);
1241 advance = 0;
1242 tptr = pptr + len;
1243 break;
1244 }
1245 tptr += advance;
1246 }
1247 break;
1248
1249 case BGPTYPE_MP_UNREACH_NLRI:
1250 TCHECK2(tptr[0], 3);
1251 af = EXTRACT_16BITS(tptr);
1252 safi = tptr[2];
1253
1254 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1255 tok2strbuf(bgp_afi_values, "Unknown AFI", af,
1256 tokbuf, sizeof(tokbuf)),
1257 af,
1258 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1259 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1260 tokbuf, sizeof(tokbuf)),
1261 safi);
1262
1263 tptr += 3;
1264
1265 while (len - (tptr - pptr) > 0) {
1266 switch (af) {
1267 case AFNUM_INET:
1268 switch (safi) {
1269 case SAFNUM_UNICAST:
1270 case SAFNUM_MULTICAST:
1271 case SAFNUM_UNIMULTICAST:
1272 advance = decode_prefix4(tptr, buf, sizeof(buf));
1273 if (advance == -1)
1274 printf("\n\t (illegal prefix length)");
1275 else if (advance == -2)
1276 goto trunc;
1277 else
1278 printf("\n\t %s", buf);
1279 break;
1280 case SAFNUM_LABUNICAST:
1281 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1282 if (advance == -1)
1283 printf("\n\t (illegal prefix length)");
1284 else if (advance == -2)
1285 goto trunc;
1286 else
1287 printf("\n\t %s", buf);
1288 break;
1289 case SAFNUM_VPNUNICAST:
1290 case SAFNUM_VPNMULTICAST:
1291 case SAFNUM_VPNUNIMULTICAST:
1292 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1293 if (advance == -1)
1294 printf("\n\t (illegal prefix length)");
1295 else if (advance == -2)
1296 goto trunc;
1297 else
1298 printf("\n\t %s", buf);
1299 break;
1300 default:
1301 TCHECK2(*(tptr-3),tlen);
1302 printf("\n\t no SAFI %u decoder",safi);
1303 if (vflag <= 1)
1304 print_unknown_data(tptr-3,"\n\t ",tlen);
1305 advance = 0;
1306 tptr = pptr + len;
1307 break;
1308 }
1309 break;
1310
1311 #ifdef INET6
1312 case AFNUM_INET6:
1313 switch (safi) {
1314 case SAFNUM_UNICAST:
1315 case SAFNUM_MULTICAST:
1316 case SAFNUM_UNIMULTICAST:
1317 advance = decode_prefix6(tptr, buf, sizeof(buf));
1318 if (advance == -1)
1319 printf("\n\t (illegal prefix length)");
1320 else if (advance == -2)
1321 goto trunc;
1322 else
1323 printf("\n\t %s", buf);
1324 break;
1325 case SAFNUM_LABUNICAST:
1326 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1327 if (advance == -1)
1328 printf("\n\t (illegal prefix length)");
1329 else if (advance == -2)
1330 goto trunc;
1331 else
1332 printf("\n\t %s", buf);
1333 break;
1334 case SAFNUM_VPNUNICAST:
1335 case SAFNUM_VPNMULTICAST:
1336 case SAFNUM_VPNUNIMULTICAST:
1337 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1338 if (advance == -1)
1339 printf("\n\t (illegal prefix length)");
1340 else if (advance == -2)
1341 goto trunc;
1342 else
1343 printf("\n\t %s", buf);
1344 break;
1345 default:
1346 TCHECK2(*(tptr-3),tlen);
1347 printf("\n\t no SAFI %u decoder",safi);
1348 if (vflag <= 1)
1349 print_unknown_data(tptr-3,"\n\t ",tlen);
1350 advance = 0;
1351 tptr = pptr + len;
1352 break;
1353 }
1354 break;
1355 #endif
1356
1357 case AFNUM_L2VPN:
1358 switch(safi) {
1359 case SAFNUM_VPNUNICAST:
1360 case SAFNUM_VPNMULTICAST:
1361 case SAFNUM_VPNUNIMULTICAST:
1362 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1363 if (advance == -1)
1364 printf("\n\t (illegal length)");
1365 else if (advance == -2)
1366 goto trunc;
1367 else
1368 printf("\n\t %s", buf);
1369 break;
1370 default:
1371 TCHECK2(*(tptr-3),tlen);
1372 printf("no SAFI %u decoder",safi);
1373 if (vflag <= 1)
1374 print_unknown_data(tptr-3,"\n\t ",tlen);
1375 advance = 0;
1376 tptr = pptr + len;
1377 break;
1378 }
1379 break;
1380
1381 default:
1382 TCHECK2(*(tptr-3),tlen);
1383 printf("\n\t no AFI %u decoder",af);
1384 if (vflag <= 1)
1385 print_unknown_data(tptr-3,"\n\t ",tlen);
1386 advance = 0;
1387 tptr = pptr + len;
1388 break;
1389 }
1390
1391 tptr += advance;
1392 }
1393 break;
1394 case BGPTYPE_EXTD_COMMUNITIES:
1395 if (len % 8) {
1396 printf("invalid len");
1397 break;
1398 }
1399 while (tlen>0) {
1400 u_int16_t extd_comm;
1401
1402 TCHECK2(tptr[0], 2);
1403 extd_comm=EXTRACT_16BITS(tptr);
1404
1405 printf("\n\t %s (0x%04x), Flags [%s]",
1406 tok2strbuf(bgp_extd_comm_subtype_values,
1407 "unknown extd community typecode",
1408 extd_comm, tokbuf, sizeof(tokbuf)),
1409 extd_comm,
1410 bittok2str(bgp_extd_comm_flag_values, "none", extd_comm));
1411
1412 TCHECK2(*(tptr+2), 6);
1413 switch(extd_comm) {
1414 case BGP_EXT_COM_RT_0:
1415 case BGP_EXT_COM_RO_0:
1416 printf(": %u:%s",
1417 EXTRACT_16BITS(tptr+2),
1418 getname(tptr+4));
1419 break;
1420 case BGP_EXT_COM_RT_1:
1421 case BGP_EXT_COM_RO_1:
1422 printf(": %s:%u",
1423 getname(tptr+2),
1424 EXTRACT_16BITS(tptr+6));
1425 break;
1426 case BGP_EXT_COM_RT_2:
1427 case BGP_EXT_COM_RO_2:
1428 printf(": %u:%u",
1429 EXTRACT_32BITS(tptr+2),
1430 EXTRACT_16BITS(tptr+6));
1431 break;
1432 case BGP_EXT_COM_LINKBAND:
1433 bw.i = EXTRACT_32BITS(tptr+2);
1434 printf(": bandwidth: %.3f Mbps",
1435 bw.f*8/1000000);
1436 break;
1437 case BGP_EXT_COM_CISCO_MCAST:
1438 printf(": AS %u, group %s",
1439 EXTRACT_16BITS(tptr+2),
1440 getname(tptr+4));
1441 break;
1442 case BGP_EXT_COM_VPN_ORIGIN:
1443 case BGP_EXT_COM_VPN_ORIGIN2:
1444 case BGP_EXT_COM_VPN_ORIGIN3:
1445 case BGP_EXT_COM_VPN_ORIGIN4:
1446 case BGP_EXT_COM_OSPF_RID:
1447 case BGP_EXT_COM_OSPF_RID2:
1448 printf("%s", getname(tptr+2));
1449 break;
1450 case BGP_EXT_COM_OSPF_RTYPE:
1451 case BGP_EXT_COM_OSPF_RTYPE2:
1452 printf(": area:%s, router-type:%s, metric-type:%s%s",
1453 getname(tptr+2),
1454 tok2strbuf(bgp_extd_comm_ospf_rtype_values,
1455 "unknown (0x%02x)",
1456 *(tptr+6),
1457 tokbuf, sizeof(tokbuf)),
1458 (*(tptr+7) & BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "",
1459 (*(tptr+6) == (BGP_OSPF_RTYPE_EXT ||BGP_OSPF_RTYPE_NSSA )) ? "E1" : "");
1460 break;
1461 case BGP_EXT_COM_L2INFO:
1462 printf(": %s Control Flags [0x%02x]:MTU %u",
1463 tok2strbuf(bgp_l2vpn_encaps_values,
1464 "unknown encaps",
1465 *(tptr+2),
1466 tokbuf, sizeof(tokbuf)),
1467 *(tptr+3),
1468 EXTRACT_16BITS(tptr+4));
1469 break;
1470 default:
1471 print_unknown_data(tptr,"\n\t ",8);
1472 break;
1473 }
1474 tlen -=8;
1475 tptr +=8;
1476 }
1477 break;
1478
1479 case BGPTYPE_ATTR_SET:
1480 TCHECK2(tptr[0], 4);
1481 printf("\n\t Origin AS: %u", EXTRACT_32BITS(tptr));
1482 tptr+=4;
1483 len -=4;
1484
1485 while (len >= 2 ) {
1486 int alen;
1487 struct bgp_attr bgpa;
1488
1489 TCHECK2(tptr[0], sizeof(bgpa));
1490 memcpy(&bgpa, tptr, sizeof(bgpa));
1491 alen = bgp_attr_len(&bgpa);
1492 tptr += bgp_attr_off(&bgpa);
1493 len -= bgp_attr_off(&bgpa);
1494
1495 printf("\n\t %s (%u), length: %u",
1496 tok2strbuf(bgp_attr_values,
1497 "Unknown Attribute", bgpa.bgpa_type,
1498 tokbuf, sizeof(tokbuf)),
1499 bgpa.bgpa_type,
1500 alen);
1501
1502 if (bgpa.bgpa_flags) {
1503 printf(", Flags [%s%s%s%s",
1504 bgpa.bgpa_flags & 0x80 ? "O" : "",
1505 bgpa.bgpa_flags & 0x40 ? "T" : "",
1506 bgpa.bgpa_flags & 0x20 ? "P" : "",
1507 bgpa.bgpa_flags & 0x10 ? "E" : "");
1508 if (bgpa.bgpa_flags & 0xf)
1509 printf("+%x", bgpa.bgpa_flags & 0xf);
1510 printf("]: ");
1511 }
1512 /* FIXME check for recursion */
1513 if (!bgp_attr_print(&bgpa, tptr, alen))
1514 return 0;
1515 tptr += alen;
1516 len -= alen;
1517 }
1518 break;
1519
1520
1521 default:
1522 TCHECK2(*pptr,len);
1523 printf("\n\t no Attribute %u decoder",attr->bgpa_type); /* we have no decoder for the attribute */
1524 if (vflag <= 1)
1525 print_unknown_data(pptr,"\n\t ",len);
1526 break;
1527 }
1528 if (vflag > 1 && len) /* omit zero length attributes*/
1529 print_unknown_data(pptr,"\n\t ",len);
1530 return 1;
1531
1532 trunc:
1533 return 0;
1534 }
1535
1536 static void
1537 bgp_open_print(const u_char *dat, int length)
1538 {
1539 struct bgp_open bgpo;
1540 struct bgp_opt bgpopt;
1541 int hlen;
1542 const u_char *opt;
1543 int i,cap_type,cap_len,tcap_len,cap_offset;
1544 char tokbuf[TOKBUFSIZE];
1545 char tokbuf2[TOKBUFSIZE];
1546
1547 TCHECK2(dat[0], BGP_OPEN_SIZE);
1548 memcpy(&bgpo, dat, BGP_OPEN_SIZE);
1549 hlen = ntohs(bgpo.bgpo_len);
1550
1551 printf("\n\t Version %d, ", bgpo.bgpo_version);
1552 printf("my AS %u, ", ntohs(bgpo.bgpo_myas));
1553 printf("Holdtime %us, ", ntohs(bgpo.bgpo_holdtime));
1554 printf("ID %s", getname((u_char *)&bgpo.bgpo_id));
1555 printf("\n\t Optional parameters, length: %u", bgpo.bgpo_optlen);
1556
1557 /* some little sanity checking */
1558 if (length < bgpo.bgpo_optlen+BGP_OPEN_SIZE)
1559 return;
1560
1561 /* ugly! */
1562 opt = &((const struct bgp_open *)dat)->bgpo_optlen;
1563 opt++;
1564
1565 i = 0;
1566 while (i < bgpo.bgpo_optlen) {
1567 TCHECK2(opt[i], BGP_OPT_SIZE);
1568 memcpy(&bgpopt, &opt[i], BGP_OPT_SIZE);
1569 if (i + 2 + bgpopt.bgpopt_len > bgpo.bgpo_optlen) {
1570 printf("\n\t Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len);
1571 break;
1572 }
1573
1574 printf("\n\t Option %s (%u), length: %u",
1575 tok2strbuf(bgp_opt_values,"Unknown",
1576 bgpopt.bgpopt_type,
1577 tokbuf, sizeof(tokbuf)),
1578 bgpopt.bgpopt_type,
1579 bgpopt.bgpopt_len);
1580
1581 /* now lets decode the options we know*/
1582 switch(bgpopt.bgpopt_type) {
1583 case BGP_OPT_CAP:
1584 cap_type=opt[i+BGP_OPT_SIZE];
1585 cap_len=opt[i+BGP_OPT_SIZE+1];
1586 tcap_len=cap_len;
1587 printf("\n\t %s, length: %u",
1588 tok2strbuf(bgp_capcode_values, "Unknown",
1589 cap_type, tokbuf, sizeof(tokbuf)),
1590 cap_len);
1591 switch(cap_type) {
1592 case BGP_CAPCODE_MP:
1593 printf("\n\t\tAFI %s (%u), SAFI %s (%u)",
1594 tok2strbuf(bgp_afi_values, "Unknown",
1595 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1596 tokbuf, sizeof(tokbuf)),
1597 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1598 tok2strbuf(bgp_safi_values, "Unknown",
1599 opt[i+BGP_OPT_SIZE+5],
1600 tokbuf, sizeof(tokbuf)),
1601 opt[i+BGP_OPT_SIZE+5]);
1602 break;
1603 case BGP_CAPCODE_RESTART:
1604 printf("\n\t\tRestart Flags: [%s], Restart Time %us",
1605 ((opt[i+BGP_OPT_SIZE+2])&0x80) ? "R" : "none",
1606 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2)&0xfff);
1607 tcap_len-=2;
1608 cap_offset=4;
1609 while(tcap_len>=4) {
1610 printf("\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s",
1611 tok2strbuf(bgp_afi_values,"Unknown",
1612 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1613 tokbuf, sizeof(tokbuf)),
1614 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1615 tok2strbuf(bgp_safi_values,"Unknown",
1616 opt[i+BGP_OPT_SIZE+cap_offset+2],
1617 tokbuf2, sizeof(tokbuf2)),
1618 opt[i+BGP_OPT_SIZE+cap_offset+2],
1619 ((opt[i+BGP_OPT_SIZE+cap_offset+3])&0x80) ? "yes" : "no" );
1620 tcap_len-=4;
1621 cap_offset+=4;
1622 }
1623 break;
1624 case BGP_CAPCODE_RR:
1625 case BGP_CAPCODE_RR_CISCO:
1626 break;
1627 default:
1628 printf("\n\t\tno decoder for Capability %u",
1629 cap_type);
1630 if (vflag <= 1)
1631 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
1632 break;
1633 }
1634 if (vflag > 1)
1635 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
1636 break;
1637 case BGP_OPT_AUTH:
1638 default:
1639 printf("\n\t no decoder for option %u",
1640 bgpopt.bgpopt_type);
1641 break;
1642 }
1643
1644 i += BGP_OPT_SIZE + bgpopt.bgpopt_len;
1645 }
1646 return;
1647 trunc:
1648 printf("[|BGP]");
1649 }
1650
1651 static void
1652 bgp_update_print(const u_char *dat, int length)
1653 {
1654 struct bgp bgp;
1655 struct bgp_attr bgpa;
1656 int hlen;
1657 const u_char *p;
1658 int len;
1659 int i;
1660 char tokbuf[TOKBUFSIZE];
1661
1662 TCHECK2(dat[0], BGP_SIZE);
1663 memcpy(&bgp, dat, BGP_SIZE);
1664 hlen = ntohs(bgp.bgp_len);
1665 p = dat + BGP_SIZE; /*XXX*/
1666
1667 /* Unfeasible routes */
1668 len = EXTRACT_16BITS(p);
1669 if (len) {
1670 /*
1671 * Without keeping state from the original NLRI message,
1672 * it's not possible to tell if this a v4 or v6 route,
1673 * so only try to decode it if we're not v6 enabled.
1674 */
1675 #ifdef INET6
1676 printf("\n\t Withdrawn routes: %d bytes", len);
1677 #else
1678 char buf[MAXHOSTNAMELEN + 100];
1679 int wpfx;
1680
1681 TCHECK2(p[2], len);
1682 i = 2;
1683
1684 printf("\n\t Withdrawn routes:");
1685
1686 while(i < 2 + len) {
1687 wpfx = decode_prefix4(&p[i], buf, sizeof(buf));
1688 if (wpfx == -1) {
1689 printf("\n\t (illegal prefix length)");
1690 break;
1691 } else if (wpfx == -2)
1692 goto trunc;
1693 else {
1694 i += wpfx;
1695 printf("\n\t %s", buf);
1696 }
1697 }
1698 #endif
1699 }
1700 p += 2 + len;
1701
1702 TCHECK2(p[0], 2);
1703 len = EXTRACT_16BITS(p);
1704 if (len) {
1705 /* do something more useful!*/
1706 i = 2;
1707 while (i < 2 + len) {
1708 int alen, aoff;
1709
1710 TCHECK2(p[i], sizeof(bgpa));
1711 memcpy(&bgpa, &p[i], sizeof(bgpa));
1712 alen = bgp_attr_len(&bgpa);
1713 aoff = bgp_attr_off(&bgpa);
1714
1715 printf("\n\t %s (%u), length: %u",
1716 tok2strbuf(bgp_attr_values, "Unknown Attribute",
1717 bgpa.bgpa_type,
1718 tokbuf, sizeof(tokbuf)),
1719 bgpa.bgpa_type,
1720 alen);
1721
1722 if (bgpa.bgpa_flags) {
1723 printf(", Flags [%s%s%s%s",
1724 bgpa.bgpa_flags & 0x80 ? "O" : "",
1725 bgpa.bgpa_flags & 0x40 ? "T" : "",
1726 bgpa.bgpa_flags & 0x20 ? "P" : "",
1727 bgpa.bgpa_flags & 0x10 ? "E" : "");
1728 if (bgpa.bgpa_flags & 0xf)
1729 printf("+%x", bgpa.bgpa_flags & 0xf);
1730 printf("]: ");
1731 }
1732 if (!bgp_attr_print(&bgpa, &p[i + aoff], alen))
1733 goto trunc;
1734 i += aoff + alen;
1735 }
1736 }
1737 p += 2 + len;
1738
1739 if (dat + length > p) {
1740 printf("\n\t Updated routes:");
1741 while (dat + length > p) {
1742 char buf[MAXHOSTNAMELEN + 100];
1743 i = decode_prefix4(p, buf, sizeof(buf));
1744 if (i == -1)
1745 printf("\n\t (illegal prefix length)");
1746 else if (i == -2)
1747 goto trunc;
1748 else {
1749 printf("\n\t %s", buf);
1750 p += i;
1751 }
1752 }
1753 }
1754 return;
1755 trunc:
1756 printf("[|BGP]");
1757 }
1758
1759 static void
1760 bgp_notification_print(const u_char *dat, int length)
1761 {
1762 struct bgp_notification bgpn;
1763 int hlen;
1764 const u_char *tptr;
1765 char tokbuf[TOKBUFSIZE];
1766 char tokbuf2[TOKBUFSIZE];
1767
1768 TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
1769 memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
1770 hlen = ntohs(bgpn.bgpn_len);
1771
1772 /* some little sanity checking */
1773 if (length<BGP_NOTIFICATION_SIZE)
1774 return;
1775
1776 printf(", %s (%u)",
1777 tok2strbuf(bgp_notify_major_values, "Unknown Error",
1778 bgpn.bgpn_major, tokbuf, sizeof(tokbuf)),
1779 bgpn.bgpn_major);
1780
1781 switch (bgpn.bgpn_major) {
1782
1783 case BGP_NOTIFY_MAJOR_MSG:
1784 printf(", subcode %s (%u)",
1785 tok2strbuf(bgp_notify_minor_msg_values, "Unknown",
1786 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1787 bgpn.bgpn_minor);
1788 break;
1789 case BGP_NOTIFY_MAJOR_OPEN:
1790 printf(", subcode %s (%u)",
1791 tok2strbuf(bgp_notify_minor_open_values, "Unknown",
1792 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1793 bgpn.bgpn_minor);
1794 break;
1795 case BGP_NOTIFY_MAJOR_UPDATE:
1796 printf(", subcode %s (%u)",
1797 tok2strbuf(bgp_notify_minor_update_values, "Unknown",
1798 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1799 bgpn.bgpn_minor);
1800 break;
1801 case BGP_NOTIFY_MAJOR_CAP:
1802 printf(" subcode %s (%u)",
1803 tok2strbuf(bgp_notify_minor_cap_values, "Unknown",
1804 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1805 bgpn.bgpn_minor);
1806 case BGP_NOTIFY_MAJOR_CEASE:
1807 printf(", subcode %s (%u)",
1808 tok2strbuf(bgp_notify_minor_cease_values, "Unknown",
1809 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1810 bgpn.bgpn_minor);
1811
1812 /* draft-ietf-idr-cease-subcode-02 mentions optionally 7 bytes
1813 * for the maxprefix subtype, which may contain AFI, SAFI and MAXPREFIXES
1814 */
1815 if(bgpn.bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= BGP_NOTIFICATION_SIZE + 7) {
1816 tptr = dat + BGP_NOTIFICATION_SIZE;
1817 TCHECK2(*tptr, 7);
1818 printf(", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
1819 tok2strbuf(bgp_afi_values, "Unknown",
1820 EXTRACT_16BITS(tptr), tokbuf, sizeof(tokbuf)),
1821 EXTRACT_16BITS(tptr),
1822 tok2strbuf(bgp_safi_values, "Unknown", *(tptr+2),
1823 tokbuf2, sizeof(tokbuf)),
1824 *(tptr+2),
1825 EXTRACT_32BITS(tptr+3));
1826 }
1827 break;
1828 default:
1829 break;
1830 }
1831
1832 return;
1833 trunc:
1834 printf("[|BGP]");
1835 }
1836
1837 static void
1838 bgp_route_refresh_print(const u_char *pptr, int len) {
1839
1840 const struct bgp_route_refresh *bgp_route_refresh_header;
1841 char tokbuf[TOKBUFSIZE];
1842 char tokbuf2[TOKBUFSIZE];
1843
1844 bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
1845
1846 printf("\n\t AFI %s (%u), SAFI %s (%u)",
1847 tok2strbuf(bgp_afi_values,"Unknown",
1848 /* this stinks but the compiler pads the structure
1849 * weird */
1850 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
1851 tokbuf, sizeof(tokbuf)),
1852 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
1853 tok2strbuf(bgp_safi_values,"Unknown",
1854 bgp_route_refresh_header->safi,
1855 tokbuf2, sizeof(tokbuf2)),
1856 bgp_route_refresh_header->safi);
1857
1858 if (vflag > 1)
1859 print_unknown_data(pptr,"\n\t ", len);
1860
1861 return;
1862 }
1863
1864 static int
1865 bgp_header_print(const u_char *dat, int length)
1866 {
1867 struct bgp bgp;
1868 char tokbuf[TOKBUFSIZE];
1869
1870 TCHECK2(dat[0], BGP_SIZE);
1871 memcpy(&bgp, dat, BGP_SIZE);
1872 printf("\n\t%s Message (%u), length: %u",
1873 tok2strbuf(bgp_msg_values, "Unknown", bgp.bgp_type,
1874 tokbuf, sizeof(tokbuf)),
1875 bgp.bgp_type,
1876 length);
1877
1878 switch (bgp.bgp_type) {
1879 case BGP_OPEN:
1880 bgp_open_print(dat, length);
1881 break;
1882 case BGP_UPDATE:
1883 bgp_update_print(dat, length);
1884 break;
1885 case BGP_NOTIFICATION:
1886 bgp_notification_print(dat, length);
1887 break;
1888 case BGP_KEEPALIVE:
1889 break;
1890 case BGP_ROUTE_REFRESH:
1891 bgp_route_refresh_print(dat, length);
1892 break;
1893 default:
1894 /* we have no decoder for the BGP message */
1895 printf("\n\t no Message %u decoder",bgp.bgp_type);
1896 print_unknown_data(dat,"\n\t ",length);
1897 break;
1898 }
1899 return 1;
1900 trunc:
1901 printf("[|BGP]");
1902 return 0;
1903 }
1904
1905 void
1906 bgp_print(const u_char *dat, int length)
1907 {
1908 const u_char *p;
1909 const u_char *ep;
1910 const u_char *start;
1911 const u_char marker[] = {
1912 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1913 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1914 };
1915 struct bgp bgp;
1916 u_int16_t hlen;
1917 char tokbuf[TOKBUFSIZE];
1918
1919 ep = dat + length;
1920 if (snapend < dat + length)
1921 ep = snapend;
1922
1923 printf(": BGP, length: %u",length);
1924
1925 if (vflag < 1) /* lets be less chatty */
1926 return;
1927
1928 p = dat;
1929 start = p;
1930 while (p < snapend) {
1931 if (!TTEST2(p[0], 1))
1932 break;
1933 if (p[0] != 0xff) {
1934 p++;
1935 continue;
1936 }
1937
1938 if (!TTEST2(p[0], sizeof(marker)))
1939 break;
1940 if (memcmp(p, marker, sizeof(marker)) != 0) {
1941 p++;
1942 continue;
1943 }
1944
1945 /* found BGP header */
1946 TCHECK2(p[0], BGP_SIZE); /*XXX*/
1947 memcpy(&bgp, p, BGP_SIZE);
1948
1949 if (start != p)
1950 printf(" [|BGP]");
1951
1952 hlen = ntohs(bgp.bgp_len);
1953 if (hlen < BGP_SIZE) {
1954 printf("\n[|BGP Bogus header length %u < %u]", hlen,
1955 BGP_SIZE);
1956 break;
1957 }
1958
1959 if (TTEST2(p[0], hlen)) {
1960 if (!bgp_header_print(p, hlen))
1961 return;
1962 p += hlen;
1963 start = p;
1964 } else {
1965 printf("\n[|BGP %s]",
1966 tok2strbuf(bgp_msg_values,
1967 "Unknown Message Type",
1968 bgp.bgp_type,
1969 tokbuf, sizeof(tokbuf)));
1970 break;
1971 }
1972 }
1973
1974 return;
1975
1976 trunc:
1977 printf(" [|BGP]");
1978 }
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