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- add support for return code values
[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 1.84 2004-05-27 21:20:50 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
52 struct bgp {
53 u_int8_t bgp_marker[16];
54 u_int16_t bgp_len;
55 u_int8_t bgp_type;
56 };
57 #define BGP_SIZE 19 /* unaligned */
58
59 #define BGP_OPEN 1
60 #define BGP_UPDATE 2
61 #define BGP_NOTIFICATION 3
62 #define BGP_KEEPALIVE 4
63 #define BGP_ROUTE_REFRESH 5
64
65 static struct tok bgp_msg_values[] = {
66 { BGP_OPEN, "Open"},
67 { BGP_UPDATE, "Update"},
68 { BGP_NOTIFICATION, "Notification"},
69 { BGP_KEEPALIVE, "Keepalive"},
70 { BGP_ROUTE_REFRESH, "Route Refresh"},
71 { 0, NULL}
72 };
73
74 struct bgp_open {
75 u_int8_t bgpo_marker[16];
76 u_int16_t bgpo_len;
77 u_int8_t bgpo_type;
78 u_int8_t bgpo_version;
79 u_int16_t bgpo_myas;
80 u_int16_t bgpo_holdtime;
81 u_int32_t bgpo_id;
82 u_int8_t bgpo_optlen;
83 /* options should follow */
84 };
85 #define BGP_OPEN_SIZE 29 /* unaligned */
86
87 struct bgp_opt {
88 u_int8_t bgpopt_type;
89 u_int8_t bgpopt_len;
90 /* variable length */
91 };
92 #define BGP_OPT_SIZE 2 /* some compilers may pad to 4 bytes */
93
94 struct bgp_notification {
95 u_int8_t bgpn_marker[16];
96 u_int16_t bgpn_len;
97 u_int8_t bgpn_type;
98 u_int8_t bgpn_major;
99 u_int8_t bgpn_minor;
100 };
101 #define BGP_NOTIFICATION_SIZE 21 /* unaligned */
102
103 struct bgp_route_refresh {
104 u_int8_t bgp_marker[16];
105 u_int16_t len;
106 u_int8_t type;
107 u_int8_t afi[2]; /* the compiler messes this structure up */
108 u_int8_t res; /* when doing misaligned sequences of int8 and int16 */
109 u_int8_t safi; /* afi should be int16 - so we have to access it using */
110 }; /* EXTRACT_16BITS(&bgp_route_refresh->afi) (sigh) */
111 #define BGP_ROUTE_REFRESH_SIZE 23
112
113 struct bgp_attr {
114 u_int8_t bgpa_flags;
115 u_int8_t bgpa_type;
116 union {
117 u_int8_t len;
118 u_int16_t elen;
119 } bgpa_len;
120 #define bgp_attr_len(p) \
121 (((p)->bgpa_flags & 0x10) ? \
122 EXTRACT_16BITS(&(p)->bgpa_len.elen) : (p)->bgpa_len.len)
123 #define bgp_attr_off(p) \
124 (((p)->bgpa_flags & 0x10) ? 4 : 3)
125 };
126
127 #define BGPTYPE_ORIGIN 1
128 #define BGPTYPE_AS_PATH 2
129 #define BGPTYPE_NEXT_HOP 3
130 #define BGPTYPE_MULTI_EXIT_DISC 4
131 #define BGPTYPE_LOCAL_PREF 5
132 #define BGPTYPE_ATOMIC_AGGREGATE 6
133 #define BGPTYPE_AGGREGATOR 7
134 #define BGPTYPE_COMMUNITIES 8 /* RFC1997 */
135 #define BGPTYPE_ORIGINATOR_ID 9 /* RFC1998 */
136 #define BGPTYPE_CLUSTER_LIST 10 /* RFC1998 */
137 #define BGPTYPE_DPA 11 /* draft-ietf-idr-bgp-dpa */
138 #define BGPTYPE_ADVERTISERS 12 /* RFC1863 */
139 #define BGPTYPE_RCID_PATH 13 /* RFC1863 */
140 #define BGPTYPE_MP_REACH_NLRI 14 /* RFC2283 */
141 #define BGPTYPE_MP_UNREACH_NLRI 15 /* RFC2283 */
142 #define BGPTYPE_EXTD_COMMUNITIES 16 /* draft-ietf-idr-bgp-ext-communities */
143 #define BGPTYPE_ATTR_SET 128 /* draft-marques-ppvpn-ibgp */
144
145 static struct tok bgp_attr_values[] = {
146 { BGPTYPE_ORIGIN, "Origin"},
147 { BGPTYPE_AS_PATH, "AS Path"},
148 { BGPTYPE_NEXT_HOP, "Next Hop"},
149 { BGPTYPE_MULTI_EXIT_DISC, "Multi Exit Discriminator"},
150 { BGPTYPE_LOCAL_PREF, "Local Preference"},
151 { BGPTYPE_ATOMIC_AGGREGATE, "Atomic Aggregate"},
152 { BGPTYPE_AGGREGATOR, "Aggregator"},
153 { BGPTYPE_COMMUNITIES, "Community"},
154 { BGPTYPE_ORIGINATOR_ID, "Originator ID"},
155 { BGPTYPE_CLUSTER_LIST, "Cluster List"},
156 { BGPTYPE_DPA, "DPA"},
157 { BGPTYPE_ADVERTISERS, "Advertisers"},
158 { BGPTYPE_RCID_PATH, "RCID Path / Cluster ID"},
159 { BGPTYPE_MP_REACH_NLRI, "Multi-Protocol Reach NLRI"},
160 { BGPTYPE_MP_UNREACH_NLRI, "Multi-Protocol Unreach NLRI"},
161 { BGPTYPE_EXTD_COMMUNITIES, "Extended Community"},
162 { BGPTYPE_ATTR_SET, "Attribute Set"},
163 { 255, "Reserved for development"},
164 { 0, NULL}
165 };
166
167 #define BGP_AS_SET 1
168 #define BGP_AS_SEQUENCE 2
169 #define BGP_CONFED_AS_SEQUENCE 3 /* draft-ietf-idr-rfc3065bis-01 */
170 #define BGP_CONFED_AS_SET 4 /* draft-ietf-idr-rfc3065bis-01 */
171
172 static struct tok bgp_as_path_segment_open_values[] = {
173 { BGP_AS_SEQUENCE, ""},
174 { BGP_AS_SET, "{ "},
175 { BGP_CONFED_AS_SEQUENCE, "( "},
176 { BGP_CONFED_AS_SET, "({ "},
177 { 0, NULL}
178 };
179
180 static struct tok bgp_as_path_segment_close_values[] = {
181 { BGP_AS_SEQUENCE, ""},
182 { BGP_AS_SET, "}"},
183 { BGP_CONFED_AS_SEQUENCE, ")"},
184 { BGP_CONFED_AS_SET, "})"},
185 { 0, NULL}
186 };
187
188 #define BGP_OPT_AUTH 1
189 #define BGP_OPT_CAP 2
190
191
192 static struct tok bgp_opt_values[] = {
193 { BGP_OPT_AUTH, "Authentication Information"},
194 { BGP_OPT_CAP, "Capabilities Advertisement"},
195 { 0, NULL}
196 };
197
198 #define BGP_CAPCODE_MP 1
199 #define BGP_CAPCODE_RR 2
200 #define BGP_CAPCODE_ORF 3 /* XXX */
201 #define BGP_CAPCODE_RESTART 64 /* draft-ietf-idr-restart-05 */
202 #define BGP_CAPCODE_AS_NEW 65 /* XXX */
203 #define BGP_CAPCODE_DYN_CAP 67 /* XXX */
204 #define BGP_CAPCODE_RR_CISCO 128
205
206 static struct tok bgp_capcode_values[] = {
207 { BGP_CAPCODE_MP, "Multiprotocol Extensions"},
208 { BGP_CAPCODE_RR, "Route Refresh"},
209 { BGP_CAPCODE_ORF, "Cooperative Route Filtering"},
210 { BGP_CAPCODE_RESTART, "Graceful Restart"},
211 { BGP_CAPCODE_AS_NEW, "32-Bit AS Number"},
212 { BGP_CAPCODE_DYN_CAP, "Dynamic Capability"},
213 { BGP_CAPCODE_RR_CISCO, "Route Refresh (Cisco)"},
214 { 0, NULL}
215 };
216
217 #define BGP_NOTIFY_MAJOR_MSG 1
218 #define BGP_NOTIFY_MAJOR_OPEN 2
219 #define BGP_NOTIFY_MAJOR_UPDATE 3
220 #define BGP_NOTIFY_MAJOR_HOLDTIME 4
221 #define BGP_NOTIFY_MAJOR_FSM 5
222 #define BGP_NOTIFY_MAJOR_CEASE 6
223 #define BGP_NOTIFY_MAJOR_CAP 7
224
225 static struct tok bgp_notify_major_values[] = {
226 { BGP_NOTIFY_MAJOR_MSG, "Message Header Error"},
227 { BGP_NOTIFY_MAJOR_OPEN, "OPEN Message Error"},
228 { BGP_NOTIFY_MAJOR_UPDATE, "UPDATE Message Error"},
229 { BGP_NOTIFY_MAJOR_HOLDTIME,"Hold Timer Expired"},
230 { BGP_NOTIFY_MAJOR_FSM, "Finite State Machine Error"},
231 { BGP_NOTIFY_MAJOR_CEASE, "Cease"},
232 { BGP_NOTIFY_MAJOR_CAP, "Capability Message Error"},
233 { 0, NULL}
234 };
235
236 /* draft-ietf-idr-cease-subcode-02 */
237 #define BGP_NOTIFY_MINOR_CEASE_MAXPRFX 1
238 static struct tok bgp_notify_minor_cease_values[] = {
239 { BGP_NOTIFY_MINOR_CEASE_MAXPRFX, "Maximum Number of Prefixes Reached"},
240 { 2, "Administratively Shutdown"},
241 { 3, "Peer Unconfigured"},
242 { 4, "Administratively Reset"},
243 { 5, "Connection Rejected"},
244 { 6, "Other Configuration Change"},
245 { 7, "Connection Collision Resolution"},
246 { 0, NULL}
247 };
248
249 static struct tok bgp_notify_minor_msg_values[] = {
250 { 1, "Connection Not Synchronized"},
251 { 2, "Bad Message Length"},
252 { 3, "Bad Message Type"},
253 { 0, NULL}
254 };
255
256 static struct tok bgp_notify_minor_open_values[] = {
257 { 1, "Unsupported Version Number"},
258 { 2, "Bad Peer AS"},
259 { 3, "Bad BGP Identifier"},
260 { 4, "Unsupported Optional Parameter"},
261 { 5, "Authentication Failure"},
262 { 6, "Unacceptable Hold Time"},
263 { 0, NULL}
264 };
265
266 static struct tok bgp_notify_minor_update_values[] = {
267 { 1, "Malformed Attribute List"},
268 { 2, "Unrecognized Well-known Attribute"},
269 { 3, "Missing Well-known Attribute"},
270 { 4, "Attribute Flags Error"},
271 { 5, "Attribute Length Error"},
272 { 6, "Invalid ORIGIN Attribute"},
273 { 7, "AS Routing Loop"},
274 { 8, "Invalid NEXT_HOP Attribute"},
275 { 9, "Optional Attribute Error"},
276 { 10, "Invalid Network Field"},
277 { 11, "Malformed AS_PATH"},
278 { 0, NULL}
279 };
280
281 static struct tok bgp_notify_minor_cap_values[] = {
282 { 1, "Invalid Action Value" },
283 { 2, "Invalid Capability Length" },
284 { 3, "Malformed Capability Value" },
285 { 4, "Unsupported Capability Code" },
286 { 0, NULL }
287 };
288
289 static struct tok bgp_origin_values[] = {
290 { 0, "IGP"},
291 { 1, "EGP"},
292 { 2, "Incomplete"},
293 { 0, NULL}
294 };
295
296 /* Subsequent address family identifier, RFC2283 section 7 */
297 #define SAFNUM_RES 0
298 #define SAFNUM_UNICAST 1
299 #define SAFNUM_MULTICAST 2
300 #define SAFNUM_UNIMULTICAST 3
301 /* labeled BGP RFC3107 */
302 #define SAFNUM_LABUNICAST 4
303 #define SAFNUM_TUNNEL 64 /* XXX */
304 #define SAFNUM_VPLS 65 /* XXX */
305 #define SAFNUM_MDT 66 /* XXX */
306 /* Section 4.3.4 of draft-rosen-rfc2547bis-03.txt */
307 #define SAFNUM_VPNUNICAST 128
308 #define SAFNUM_VPNMULTICAST 129
309 #define SAFNUM_VPNUNIMULTICAST 130
310 /* draft-marques-ppvpn-rt-constrain-01.txt */
311 #define SAFNUM_RT_ROUTING_INFO 132
312
313 #define BGP_VPN_RD_LEN 8
314
315 static struct tok bgp_safi_values[] = {
316 { SAFNUM_RES, "Reserved"},
317 { SAFNUM_UNICAST, "Unicast"},
318 { SAFNUM_MULTICAST, "Multicast"},
319 { SAFNUM_UNIMULTICAST, "Unicast+Multicast"},
320 { SAFNUM_LABUNICAST, "labeled Unicast"},
321 { SAFNUM_TUNNEL, "Tunnel"},
322 { SAFNUM_VPLS, "VPLS"},
323 { SAFNUM_MDT, "MDT"},
324 { SAFNUM_VPNUNICAST, "labeled VPN Unicast"},
325 { SAFNUM_VPNMULTICAST, "labeled VPN Multicast"},
326 { SAFNUM_VPNUNIMULTICAST, "labeled VPN Unicast+Multicast"},
327 { SAFNUM_RT_ROUTING_INFO, "Route Target Routing Information"}, /* draft-marques-ppvpn-rt-constrain-01.txt */
328 { 0, NULL }
329 };
330
331 /* well-known community */
332 #define BGP_COMMUNITY_NO_EXPORT 0xffffff01
333 #define BGP_COMMUNITY_NO_ADVERT 0xffffff02
334 #define BGP_COMMUNITY_NO_EXPORT_SUBCONFED 0xffffff03
335
336 /* RFC1700 address family numbers */
337 #define AFNUM_INET 1
338 #define AFNUM_INET6 2
339 #define AFNUM_NSAP 3
340 #define AFNUM_HDLC 4
341 #define AFNUM_BBN1822 5
342 #define AFNUM_802 6
343 #define AFNUM_E163 7
344 #define AFNUM_E164 8
345 #define AFNUM_F69 9
346 #define AFNUM_X121 10
347 #define AFNUM_IPX 11
348 #define AFNUM_ATALK 12
349 #define AFNUM_DECNET 13
350 #define AFNUM_BANYAN 14
351 #define AFNUM_E164NSAP 15
352 /* draft-kompella-ppvpn-l2vpn */
353 #define AFNUM_L2VPN 196 /* still to be approved by IANA */
354
355 static struct tok bgp_afi_values[] = {
356 { 0, "Reserved"},
357 { AFNUM_INET, "IPv4"},
358 { AFNUM_INET6, "IPv6"},
359 { AFNUM_NSAP, "NSAP"},
360 { AFNUM_HDLC, "HDLC"},
361 { AFNUM_BBN1822, "BBN 1822"},
362 { AFNUM_802, "802"},
363 { AFNUM_E163, "E.163"},
364 { AFNUM_E164, "E.164"},
365 { AFNUM_F69, "F.69"},
366 { AFNUM_X121, "X.121"},
367 { AFNUM_IPX, "Novell IPX"},
368 { AFNUM_ATALK, "Appletalk"},
369 { AFNUM_DECNET, "Decnet IV"},
370 { AFNUM_BANYAN, "Banyan Vines"},
371 { AFNUM_E164NSAP, "E.164 with NSAP subaddress"},
372 { AFNUM_L2VPN, "Layer-2 VPN"},
373 { 0, NULL},
374 };
375
376 /* Extended community type - draft-ietf-idr-bgp-ext-communities-05 */
377 #define BGP_EXT_COM_RT_0 0x0002 /* Route Target,Format AS(2bytes):AN(4bytes) */
378 #define BGP_EXT_COM_RT_1 0x0102 /* Route Target,Format IP address:AN(2bytes) */
379 #define BGP_EXT_COM_RT_2 0x0202 /* Route Target,Format AN(4bytes):local(2bytes) */
380 #define BGP_EXT_COM_RO_0 0x0003 /* Route Origin,Format AS(2bytes):AN(4bytes) */
381 #define BGP_EXT_COM_RO_1 0x0103 /* Route Origin,Format IP address:AN(2bytes) */
382 #define BGP_EXT_COM_RO_2 0x0203 /* Route Origin,Format AN(4bytes):local(2bytes) */
383 #define BGP_EXT_COM_LINKBAND 0x4004 /* Link Bandwidth,Format AS(2B):Bandwidth(4B) */
384 /* rfc2547 bgp-mpls-vpns */
385 #define BGP_EXT_COM_CISCO_MCAST 0x0009 /* cisco proprietary */
386
387 #define BGP_EXT_COM_VPN_ORIGIN 0x0005 /* OSPF Domain ID / VPN of Origin - draft-rosen-vpns-ospf-bgp-mpls */
388 #define BGP_EXT_COM_VPN_ORIGIN2 0x0105 /* duplicate - keep for backwards compatability */
389 #define BGP_EXT_COM_VPN_ORIGIN3 0x0205 /* duplicate - keep for backwards compatability */
390 #define BGP_EXT_COM_VPN_ORIGIN4 0x8005 /* duplicate - keep for backwards compatability */
391
392 #define BGP_EXT_COM_OSPF_RTYPE 0x0306 /* OSPF Route Type,Format Area(4B):RouteType(1B):Options(1B) */
393 #define BGP_EXT_COM_OSPF_RTYPE2 0x8000 /* duplicate - keep for backwards compatability */
394
395 #define BGP_EXT_COM_OSPF_RID 0x0107 /* OSPF Router ID,Format RouterID(4B):Unused(2B) */
396 #define BGP_EXT_COM_OSPF_RID2 0x8001 /* duplicate - keep for backwards compatability */
397
398 #define BGP_EXT_COM_L2INFO 0x800a /* draft-kompella-ppvpn-l2vpn */
399
400 static struct tok bgp_extd_comm_flag_values[] = {
401 { 0x8000, "vendor-specific"},
402 { 0x4000, "non-transitive"},
403 { 0, NULL},
404 };
405
406 static struct tok bgp_extd_comm_subtype_values[] = {
407 { BGP_EXT_COM_RT_0, "target"},
408 { BGP_EXT_COM_RT_1, "target"},
409 { BGP_EXT_COM_RT_2, "target"},
410 { BGP_EXT_COM_RO_0, "origin"},
411 { BGP_EXT_COM_RO_1, "origin"},
412 { BGP_EXT_COM_RO_2, "origin"},
413 { BGP_EXT_COM_LINKBAND, "link-BW"},
414 { BGP_EXT_COM_CISCO_MCAST, "mdt-group"},
415 { BGP_EXT_COM_VPN_ORIGIN, "ospf-domain"},
416 { BGP_EXT_COM_VPN_ORIGIN2, "ospf-domain"},
417 { BGP_EXT_COM_VPN_ORIGIN3, "ospf-domain"},
418 { BGP_EXT_COM_VPN_ORIGIN4, "ospf-domain"},
419 { BGP_EXT_COM_OSPF_RTYPE, "ospf-route-type"},
420 { BGP_EXT_COM_OSPF_RTYPE2, "ospf-route-type"},
421 { BGP_EXT_COM_OSPF_RID, "ospf-router-id"},
422 { BGP_EXT_COM_OSPF_RID2, "ospf-router-id"},
423 { BGP_EXT_COM_L2INFO, "layer2-info"},
424 { 0, NULL},
425 };
426
427 /* OSPF codes for BGP_EXT_COM_OSPF_RTYPE draft-rosen-vpns-ospf-bgp-mpls */
428 #define BGP_OSPF_RTYPE_RTR 1 /* OSPF Router LSA */
429 #define BGP_OSPF_RTYPE_NET 2 /* OSPF Network LSA */
430 #define BGP_OSPF_RTYPE_SUM 3 /* OSPF Summary LSA */
431 #define BGP_OSPF_RTYPE_EXT 5 /* OSPF External LSA, note that ASBR doesn't apply to MPLS-VPN */
432 #define BGP_OSPF_RTYPE_NSSA 7 /* OSPF NSSA External*/
433 #define BGP_OSPF_RTYPE_SHAM 129 /* OSPF-MPLS-VPN Sham link */
434 #define BGP_OSPF_RTYPE_METRIC_TYPE 0x1 /* LSB of RTYPE Options Field */
435
436 static struct tok bgp_extd_comm_ospf_rtype_values[] = {
437 { BGP_OSPF_RTYPE_RTR, "Router" },
438 { BGP_OSPF_RTYPE_NET, "Network" },
439 { BGP_OSPF_RTYPE_SUM, "Summary" },
440 { BGP_OSPF_RTYPE_EXT, "External" },
441 { BGP_OSPF_RTYPE_NSSA,"NSSA External" },
442 { BGP_OSPF_RTYPE_SHAM,"MPLS-VPN Sham" },
443 { 0, NULL },
444 };
445
446 static struct tok bgp_l2vpn_encaps_values[] = {
447 { 0, "Reserved"},
448 { 1, "Frame Relay"},
449 { 2, "ATM AAL5 VCC transport"},
450 { 3, "ATM transparent cell transport"},
451 { 4, "Ethernet VLAN"},
452 { 5, "Ethernet"},
453 { 6, "Cisco-HDLC"},
454 { 7, "PPP"},
455 { 8, "CEM"},
456 { 9, "ATM VCC cell transport"},
457 { 10, "ATM VPC cell transport"},
458 { 11, "MPLS"},
459 { 12, "VPLS"},
460 { 64, "IP-interworking"},
461 { 0, NULL},
462 };
463
464 int
465 decode_prefix4(const u_char *pptr, char *buf, u_int buflen)
466 {
467 struct in_addr addr;
468 u_int plen;
469
470 TCHECK(pptr[0]);
471 plen = pptr[0];
472 if (32 < plen)
473 return -1;
474
475 memset(&addr, 0, sizeof(addr));
476 TCHECK2(pptr[1], (plen + 7) / 8);
477 memcpy(&addr, &pptr[1], (plen + 7) / 8);
478 if (plen % 8) {
479 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
480 ((0xff00 >> (plen % 8)) & 0xff);
481 }
482 snprintf(buf, buflen, "%s/%d", getname((u_char *)&addr), plen);
483 return 1 + (plen + 7) / 8;
484
485 trunc:
486 return -2;
487 }
488
489 static int
490 decode_labeled_prefix4(const u_char *pptr, char *buf, u_int buflen)
491 {
492 struct in_addr addr;
493 u_int plen;
494
495 TCHECK(pptr[0]);
496 plen = pptr[0]; /* get prefix length */
497
498 /* this is one of the weirdnesses of rfc3107
499 the label length (actually the label + COS bits)
500 is added to the prefix length;
501 we also do only read out just one label -
502 there is no real application for advertisement of
503 stacked labels in a a single BGP message
504 */
505
506 plen-=24; /* adjust prefixlen - labellength */
507
508 if (32 < plen)
509 return -1;
510
511 memset(&addr, 0, sizeof(addr));
512 TCHECK2(pptr[4], (plen + 7) / 8);
513 memcpy(&addr, &pptr[4], (plen + 7) / 8);
514 if (plen % 8) {
515 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
516 ((0xff00 >> (plen % 8)) & 0xff);
517 }
518 /* the label may get offsetted by 4 bits so lets shift it right */
519 snprintf(buf, buflen, "%s/%d, label:%u %s",
520 getname((u_char *)&addr),
521 plen,
522 EXTRACT_24BITS(pptr+1)>>4,
523 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
524
525 return 4 + (plen + 7) / 8;
526
527 trunc:
528 return -2;
529 }
530
531 /* RDs and RTs share the same semantics
532 * we use bgp_vpn_rd_print for
533 * printing route targets inside a NLRI */
534 static char *
535 bgp_vpn_rd_print (const u_char *pptr) {
536
537 /* allocate space for the largest possible string */
538 static char rd[sizeof("xxxxxxxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")];
539 char *pos = rd;
540
541 /* ok lets load the RD format */
542 switch (EXTRACT_16BITS(pptr)) {
543
544 /* AS:IP-address fmt*/
545 case 0:
546 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u.%u.%u.%u",
547 EXTRACT_16BITS(pptr+2), *(pptr+4), *(pptr+5), *(pptr+6), *(pptr+7));
548 break;
549 /* IP-address:AS fmt*/
550
551 case 1:
552 snprintf(pos, sizeof(rd) - (pos - rd), "%u.%u.%u.%u:%u",
553 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
554 break;
555
556 /* 4-byte-AS:number fmt*/
557 case 2:
558 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u (%u.%u.%u.%u:%u)",
559 EXTRACT_32BITS(pptr+2), EXTRACT_16BITS(pptr+6),
560 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
561 break;
562 default:
563 snprintf(pos, sizeof(rd) - (pos - rd), "unknown RD format");
564 break;
565 }
566 pos += strlen(pos);
567 *(pos) = '\0';
568 return (rd);
569 }
570
571 static int
572 decode_rt_routing_info(const u_char *pptr, char *buf, u_int buflen)
573 {
574 u_int8_t route_target[8];
575 u_int plen;
576
577 TCHECK(pptr[0]);
578 plen = pptr[0]; /* get prefix length */
579
580 plen-=32; /* adjust prefix length */
581
582 if (0 < plen)
583 return -1;
584
585 memset(&route_target, 0, sizeof(route_target));
586 TCHECK2(pptr[1], (plen + 7) / 8);
587 memcpy(&route_target, &pptr[1], (plen + 7) / 8);
588 if (plen % 8) {
589 ((u_char *)&route_target)[(plen + 7) / 8 - 1] &=
590 ((0xff00 >> (plen % 8)) & 0xff);
591 }
592 snprintf(buf, buflen, "origin AS: %u, route target %s",
593 EXTRACT_32BITS(pptr+1),
594 bgp_vpn_rd_print((u_char *)&route_target));
595
596 return 5 + (plen + 7) / 8;
597
598 trunc:
599 return -2;
600 }
601
602 static int
603 decode_labeled_vpn_prefix4(const u_char *pptr, char *buf, u_int buflen)
604 {
605 struct in_addr addr;
606 u_int plen;
607
608 TCHECK(pptr[0]);
609 plen = pptr[0]; /* get prefix length */
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 plen-=24; /* adjust prefixlen - labellength */
726
727 if (128 < plen)
728 return -1;
729
730 memset(&addr, 0, sizeof(addr));
731 TCHECK2(pptr[4], (plen + 7) / 8);
732 memcpy(&addr, &pptr[4], (plen + 7) / 8);
733 if (plen % 8) {
734 addr.s6_addr[(plen + 7) / 8 - 1] &=
735 ((0xff00 >> (plen % 8)) & 0xff);
736 }
737 /* the label may get offsetted by 4 bits so lets shift it right */
738 snprintf(buf, buflen, "%s/%d, label:%u %s",
739 getname6((u_char *)&addr),
740 plen,
741 EXTRACT_24BITS(pptr+1)>>4,
742 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
743
744 return 4 + (plen + 7) / 8;
745
746 trunc:
747 return -2;
748 }
749
750 static int
751 decode_labeled_vpn_prefix6(const u_char *pptr, char *buf, u_int buflen)
752 {
753 struct in6_addr addr;
754 u_int plen;
755
756 TCHECK(pptr[0]);
757 plen = pptr[0]; /* get prefix length */
758
759 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
760
761 if (128 < plen)
762 return -1;
763
764 memset(&addr, 0, sizeof(addr));
765 TCHECK2(pptr[12], (plen + 7) / 8);
766 memcpy(&addr, &pptr[12], (plen + 7) / 8);
767 if (plen % 8) {
768 addr.s6_addr[(plen + 7) / 8 - 1] &=
769 ((0xff00 >> (plen % 8)) & 0xff);
770 }
771 /* the label may get offsetted by 4 bits so lets shift it right */
772 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
773 bgp_vpn_rd_print(pptr+4),
774 getname6((u_char *)&addr),
775 plen,
776 EXTRACT_24BITS(pptr+1)>>4,
777 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
778
779 return 12 + (plen + 7) / 8;
780
781 trunc:
782 return -2;
783 }
784 #endif
785
786 static int
787 bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len)
788 {
789 int i;
790 u_int16_t af;
791 u_int8_t safi, snpa;
792 union { /* copy buffer for bandwidth values */
793 float f;
794 u_int32_t i;
795 } bw;
796 int advance;
797 int tlen;
798 const u_char *tptr;
799 char buf[MAXHOSTNAMELEN + 100];
800 char tokbuf[TOKBUFSIZE];
801
802 tptr = pptr;
803 tlen=len;
804
805 switch (attr->bgpa_type) {
806 case BGPTYPE_ORIGIN:
807 if (len != 1)
808 printf("invalid len");
809 else {
810 TCHECK(*tptr);
811 printf("%s", tok2strbuf(bgp_origin_values,
812 "Unknown Origin Typecode",
813 tptr[0],
814 tokbuf, sizeof(tokbuf)));
815 }
816 break;
817
818 case BGPTYPE_AS_PATH:
819 if (len % 2) {
820 printf("invalid len");
821 break;
822 }
823 if (!len) {
824 printf("empty");
825 break;
826 }
827
828 while (tptr < pptr + len) {
829 TCHECK(tptr[0]);
830 printf("%s", tok2strbuf(bgp_as_path_segment_open_values,
831 "?", tptr[0],
832 tokbuf, sizeof(tokbuf)));
833 for (i = 0; i < tptr[1] * 2; i += 2) {
834 TCHECK2(tptr[2 + i], 2);
835 printf("%u ", EXTRACT_16BITS(&tptr[2 + i]));
836 }
837 TCHECK(tptr[0]);
838 printf("%s", tok2strbuf(bgp_as_path_segment_close_values,
839 "?", tptr[0],
840 tokbuf, sizeof(tokbuf)));
841 TCHECK(tptr[1]);
842 tptr += 2 + tptr[1] * 2;
843 }
844 break;
845 case BGPTYPE_NEXT_HOP:
846 if (len != 4)
847 printf("invalid len");
848 else {
849 TCHECK2(tptr[0], 4);
850 printf("%s", getname(tptr));
851 }
852 break;
853 case BGPTYPE_MULTI_EXIT_DISC:
854 case BGPTYPE_LOCAL_PREF:
855 if (len != 4)
856 printf("invalid len");
857 else {
858 TCHECK2(tptr[0], 4);
859 printf("%u", EXTRACT_32BITS(tptr));
860 }
861 break;
862 case BGPTYPE_ATOMIC_AGGREGATE:
863 if (len != 0)
864 printf("invalid len");
865 break;
866 case BGPTYPE_AGGREGATOR:
867 if (len != 6) {
868 printf("invalid len");
869 break;
870 }
871 TCHECK2(tptr[0], 6);
872 printf(" AS #%u, origin %s", EXTRACT_16BITS(tptr),
873 getname(tptr + 2));
874 break;
875 case BGPTYPE_COMMUNITIES:
876 if (len % 4) {
877 printf("invalid len");
878 break;
879 }
880 while (tlen>0) {
881 u_int32_t comm;
882 TCHECK2(tptr[0], 4);
883 comm = EXTRACT_32BITS(tptr);
884 switch (comm) {
885 case BGP_COMMUNITY_NO_EXPORT:
886 printf(" NO_EXPORT");
887 break;
888 case BGP_COMMUNITY_NO_ADVERT:
889 printf(" NO_ADVERTISE");
890 break;
891 case BGP_COMMUNITY_NO_EXPORT_SUBCONFED:
892 printf(" NO_EXPORT_SUBCONFED");
893 break;
894 default:
895 printf("%u:%u%s",
896 (comm >> 16) & 0xffff,
897 comm & 0xffff,
898 (tlen>4) ? ", " : "");
899 break;
900 }
901 tlen -=4;
902 tptr +=4;
903 }
904 break;
905 case BGPTYPE_ORIGINATOR_ID:
906 if (len != 4) {
907 printf("invalid len");
908 break;
909 }
910 TCHECK2(tptr[0], 4);
911 printf("%s",getname(tptr));
912 break;
913 case BGPTYPE_CLUSTER_LIST:
914 if (len % 4) {
915 printf("invalid len");
916 break;
917 }
918 while (tlen>0) {
919 TCHECK2(tptr[0], 4);
920 printf("%s%s",
921 getname(tptr),
922 (tlen>4) ? ", " : "");
923 tlen -=4;
924 tptr +=4;
925 }
926 break;
927 case BGPTYPE_MP_REACH_NLRI:
928 TCHECK2(tptr[0], 3);
929 af = EXTRACT_16BITS(tptr);
930 safi = tptr[2];
931
932 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
933 tok2strbuf(bgp_afi_values, "Unknown AFI", af,
934 tokbuf, sizeof(tokbuf)),
935 af,
936 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
937 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
938 tokbuf, sizeof(tokbuf)),
939 safi);
940
941 if (af == AFNUM_INET || af==AFNUM_L2VPN)
942 ;
943 #ifdef INET6
944 else if (af == AFNUM_INET6)
945 ;
946 #endif
947 else {
948 printf("\n\t no AFI %u decoder",af);
949 if (vflag <= 1)
950 print_unknown_data(tptr,"\n\t ",tlen);
951 break;
952 }
953
954 tptr +=3;
955
956 TCHECK(tptr[0]);
957 tlen = tptr[0];
958 tptr++;
959
960 if (tlen) {
961 printf("\n\t nexthop: ");
962 while (tlen > 0) {
963 switch (af) {
964 case AFNUM_INET:
965 switch(safi) {
966 case SAFNUM_UNICAST:
967 case SAFNUM_MULTICAST:
968 case SAFNUM_UNIMULTICAST:
969 case SAFNUM_LABUNICAST:
970 case SAFNUM_RT_ROUTING_INFO:
971 if (tlen < (int)sizeof(struct in_addr)) {
972 printf("invalid len");
973 tlen = 0;
974 } else {
975 TCHECK2(tptr[0], sizeof(struct in_addr));
976 printf("%s",getname(tptr));
977 tlen -= sizeof(struct in_addr);
978 tptr += sizeof(struct in_addr);
979 }
980 break;
981 case SAFNUM_VPNUNICAST:
982 case SAFNUM_VPNMULTICAST:
983 case SAFNUM_VPNUNIMULTICAST:
984 if (tlen < (int)(sizeof(struct in_addr)+BGP_VPN_RD_LEN)) {
985 printf("invalid len");
986 tlen = 0;
987 } else {
988 TCHECK2(tptr[0], sizeof(struct in_addr)+BGP_VPN_RD_LEN);
989 printf("RD: %s, %s",
990 bgp_vpn_rd_print(tptr),
991 getname(tptr+BGP_VPN_RD_LEN));
992 tlen -= (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
993 tptr += (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
994 }
995 break;
996 default:
997 TCHECK2(tptr[0], tlen);
998 printf("no SAFI %u decoder",safi);
999 if (vflag <= 1)
1000 print_unknown_data(tptr,"\n\t ",tlen);
1001 tptr += tlen;
1002 tlen = 0;
1003 break;
1004 }
1005 break;
1006 #ifdef INET6
1007 case AFNUM_INET6:
1008 switch(safi) {
1009 case SAFNUM_UNICAST:
1010 case SAFNUM_MULTICAST:
1011 case SAFNUM_UNIMULTICAST:
1012 case SAFNUM_LABUNICAST:
1013 case SAFNUM_RT_ROUTING_INFO:
1014 if (tlen < (int)sizeof(struct in6_addr)) {
1015 printf("invalid len");
1016 tlen = 0;
1017 } else {
1018 TCHECK2(tptr[0], sizeof(struct in6_addr));
1019 printf("%s", getname6(tptr));
1020 tlen -= sizeof(struct in6_addr);
1021 tptr += sizeof(struct in6_addr);
1022 }
1023 break;
1024 case SAFNUM_VPNUNICAST:
1025 case SAFNUM_VPNMULTICAST:
1026 case SAFNUM_VPNUNIMULTICAST:
1027 if (tlen < (int)(sizeof(struct in6_addr)+BGP_VPN_RD_LEN)) {
1028 printf("invalid len");
1029 tlen = 0;
1030 } else {
1031 TCHECK2(tptr[0], sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1032 printf("RD: %s, %s",
1033 bgp_vpn_rd_print(tptr),
1034 getname6(tptr+BGP_VPN_RD_LEN));
1035 tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1036 tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1037 }
1038 break;
1039 default:
1040 TCHECK2(tptr[0], tlen);
1041 printf("no SAFI %u decoder",safi);
1042 if (vflag <= 1)
1043 print_unknown_data(tptr,"\n\t ",tlen);
1044 tptr += tlen;
1045 tlen = 0;
1046 break;
1047 }
1048 break;
1049 #endif
1050 case AFNUM_L2VPN:
1051 switch(safi) {
1052 case SAFNUM_VPNUNICAST:
1053 case SAFNUM_VPNMULTICAST:
1054 case SAFNUM_VPNUNIMULTICAST:
1055 if (tlen < (int)sizeof(struct in_addr)) {
1056 printf("invalid len");
1057 tlen = 0;
1058 } else {
1059 TCHECK2(tptr[0], sizeof(struct in_addr));
1060 printf("%s", getname(tptr));
1061 tlen -= (sizeof(struct in_addr));
1062 tptr += (sizeof(struct in_addr));
1063 }
1064 break;
1065 default:
1066 TCHECK2(tptr[0], tlen);
1067 printf("no SAFI %u decoder",safi);
1068 if (vflag <= 1)
1069 print_unknown_data(tptr,"\n\t ",tlen);
1070 tptr += tlen;
1071 tlen = 0;
1072 break;
1073 }
1074 break;
1075
1076 default:
1077 TCHECK2(tptr[0], tlen);
1078 printf("no AFI %u decoder",af);
1079 if (vflag <= 1)
1080 print_unknown_data(tptr,"\n\t ",tlen);
1081 tptr += tlen;
1082 tlen = 0;
1083 break;
1084 }
1085 }
1086 }
1087 tptr += tlen;
1088
1089 TCHECK(tptr[0]);
1090 snpa = tptr[0];
1091 tptr++;
1092
1093 if (snpa) {
1094 printf("\n\t %u SNPA", snpa);
1095 for (/*nothing*/; snpa > 0; snpa--) {
1096 TCHECK(tptr[0]);
1097 printf("\n\t %d bytes", tptr[0]);
1098 tptr += tptr[0] + 1;
1099 }
1100 } else {
1101 printf(", no SNPA");
1102 }
1103
1104 while (len - (tptr - pptr) > 0) {
1105 switch (af) {
1106 case AFNUM_INET:
1107 switch (safi) {
1108 case SAFNUM_UNICAST:
1109 case SAFNUM_MULTICAST:
1110 case SAFNUM_UNIMULTICAST:
1111 advance = decode_prefix4(tptr, buf, sizeof(buf));
1112 if (advance == -1)
1113 printf("\n\t (illegal prefix length)");
1114 else if (advance == -2)
1115 goto trunc;
1116 else
1117 printf("\n\t %s", buf);
1118 break;
1119 case SAFNUM_LABUNICAST:
1120 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1121 if (advance == -1)
1122 printf("\n\t (illegal prefix length)");
1123 else if (advance == -2)
1124 goto trunc;
1125 else
1126 printf("\n\t %s", buf);
1127 break;
1128 case SAFNUM_VPNUNICAST:
1129 case SAFNUM_VPNMULTICAST:
1130 case SAFNUM_VPNUNIMULTICAST:
1131 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1132 if (advance == -1)
1133 printf("\n\t (illegal prefix length)");
1134 else if (advance == -2)
1135 goto trunc;
1136 else
1137 printf("\n\t %s", buf);
1138 break;
1139 case SAFNUM_RT_ROUTING_INFO:
1140 advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1141 if (advance == -1)
1142 printf("\n\t (illegal prefix length)");
1143 else if (advance == -2)
1144 goto trunc;
1145 else
1146 printf("\n\t %s", buf);
1147 break;
1148 default:
1149 TCHECK2(*(tptr-3),tlen);
1150 printf("\n\t no SAFI %u decoder",safi);
1151 if (vflag <= 1)
1152 print_unknown_data(tptr-3,"\n\t ",tlen);
1153 advance = 0;
1154 tptr = pptr + len;
1155 break;
1156 }
1157 break;
1158 #ifdef INET6
1159 case AFNUM_INET6:
1160 switch (safi) {
1161 case SAFNUM_UNICAST:
1162 case SAFNUM_MULTICAST:
1163 case SAFNUM_UNIMULTICAST:
1164 advance = decode_prefix6(tptr, buf, sizeof(buf));
1165 if (advance == -1)
1166 printf("\n\t (illegal prefix length)");
1167 else if (advance == -2)
1168 goto trunc;
1169 else
1170 printf("\n\t %s", buf);
1171 break;
1172 case SAFNUM_LABUNICAST:
1173 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1174 if (advance == -1)
1175 printf("\n\t (illegal prefix length)");
1176 else if (advance == -2)
1177 goto trunc;
1178 else
1179 printf("\n\t %s", buf);
1180 break;
1181 case SAFNUM_VPNUNICAST:
1182 case SAFNUM_VPNMULTICAST:
1183 case SAFNUM_VPNUNIMULTICAST:
1184 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1185 if (advance == -1)
1186 printf("\n\t (illegal prefix length)");
1187 else if (advance == -2)
1188 goto trunc;
1189 else
1190 printf("\n\t %s", buf);
1191 break;
1192 case SAFNUM_RT_ROUTING_INFO:
1193 advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1194 if (advance == -1)
1195 printf("\n\t (illegal prefix length)");
1196 else if (advance == -2)
1197 goto trunc;
1198 else
1199 printf("\n\t %s", buf);
1200 break;
1201 default:
1202 TCHECK2(*(tptr-3),tlen);
1203 printf("\n\t no SAFI %u decoder ",safi);
1204 if (vflag <= 1)
1205 print_unknown_data(tptr-3,"\n\t ",tlen);
1206 advance = 0;
1207 tptr = pptr + len;
1208 break;
1209 }
1210 break;
1211 #endif
1212 case AFNUM_L2VPN:
1213 switch(safi) {
1214 case SAFNUM_VPNUNICAST:
1215 case SAFNUM_VPNMULTICAST:
1216 case SAFNUM_VPNUNIMULTICAST:
1217 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1218 if (advance == -1)
1219 printf("\n\t (illegal length)");
1220 else if (advance == -2)
1221 goto trunc;
1222 else
1223 printf("\n\t %s", buf);
1224 break;
1225 default:
1226 TCHECK2(*tptr,tlen);
1227 printf("no SAFI %u decoder",safi);
1228 if (vflag <= 1)
1229 print_unknown_data(tptr,"\n\t ",tlen);
1230 advance = 0;
1231 tptr = pptr + len;
1232 break;
1233 }
1234 break;
1235
1236
1237 default:
1238 TCHECK2(*(tptr-3),tlen);
1239 printf("\n\t no AFI %u decoder ",af);
1240 if (vflag <= 1)
1241 print_unknown_data(tptr-3,"\n\t ",tlen);
1242 advance = 0;
1243 tptr = pptr + len;
1244 break;
1245 }
1246 tptr += advance;
1247 }
1248 break;
1249
1250 case BGPTYPE_MP_UNREACH_NLRI:
1251 TCHECK2(tptr[0], 3);
1252 af = EXTRACT_16BITS(tptr);
1253 safi = tptr[2];
1254
1255 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1256 tok2strbuf(bgp_afi_values, "Unknown AFI", af,
1257 tokbuf, sizeof(tokbuf)),
1258 af,
1259 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1260 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1261 tokbuf, sizeof(tokbuf)),
1262 safi);
1263
1264 tptr += 3;
1265
1266 while (len - (tptr - pptr) > 0) {
1267 switch (af) {
1268 case AFNUM_INET:
1269 switch (safi) {
1270 case SAFNUM_UNICAST:
1271 case SAFNUM_MULTICAST:
1272 case SAFNUM_UNIMULTICAST:
1273 advance = decode_prefix4(tptr, buf, sizeof(buf));
1274 if (advance == -1)
1275 printf("\n\t (illegal prefix length)");
1276 else if (advance == -2)
1277 goto trunc;
1278 else
1279 printf("\n\t %s", buf);
1280 break;
1281 case SAFNUM_LABUNICAST:
1282 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1283 if (advance == -1)
1284 printf("\n\t (illegal prefix length)");
1285 else if (advance == -2)
1286 goto trunc;
1287 else
1288 printf("\n\t %s", buf);
1289 break;
1290 case SAFNUM_VPNUNICAST:
1291 case SAFNUM_VPNMULTICAST:
1292 case SAFNUM_VPNUNIMULTICAST:
1293 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1294 if (advance == -1)
1295 printf("\n\t (illegal prefix length)");
1296 else if (advance == -2)
1297 goto trunc;
1298 else
1299 printf("\n\t %s", buf);
1300 break;
1301 default:
1302 TCHECK2(*(tptr-3),tlen);
1303 printf("\n\t no SAFI %u decoder",safi);
1304 if (vflag <= 1)
1305 print_unknown_data(tptr-3,"\n\t ",tlen);
1306 advance = 0;
1307 tptr = pptr + len;
1308 break;
1309 }
1310 break;
1311
1312 #ifdef INET6
1313 case AFNUM_INET6:
1314 switch (safi) {
1315 case SAFNUM_UNICAST:
1316 case SAFNUM_MULTICAST:
1317 case SAFNUM_UNIMULTICAST:
1318 advance = decode_prefix6(tptr, buf, sizeof(buf));
1319 if (advance == -1)
1320 printf("\n\t (illegal prefix length)");
1321 else if (advance == -2)
1322 goto trunc;
1323 else
1324 printf("\n\t %s", buf);
1325 break;
1326 case SAFNUM_LABUNICAST:
1327 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1328 if (advance == -1)
1329 printf("\n\t (illegal prefix length)");
1330 else if (advance == -2)
1331 goto trunc;
1332 else
1333 printf("\n\t %s", buf);
1334 break;
1335 case SAFNUM_VPNUNICAST:
1336 case SAFNUM_VPNMULTICAST:
1337 case SAFNUM_VPNUNIMULTICAST:
1338 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1339 if (advance == -1)
1340 printf("\n\t (illegal prefix length)");
1341 else if (advance == -2)
1342 goto trunc;
1343 else
1344 printf("\n\t %s", buf);
1345 break;
1346 default:
1347 TCHECK2(*(tptr-3),tlen);
1348 printf("\n\t no SAFI %u decoder",safi);
1349 if (vflag <= 1)
1350 print_unknown_data(tptr-3,"\n\t ",tlen);
1351 advance = 0;
1352 tptr = pptr + len;
1353 break;
1354 }
1355 break;
1356 #endif
1357
1358 case AFNUM_L2VPN:
1359 switch(safi) {
1360 case SAFNUM_VPNUNICAST:
1361 case SAFNUM_VPNMULTICAST:
1362 case SAFNUM_VPNUNIMULTICAST:
1363 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1364 if (advance == -1)
1365 printf("\n\t (illegal length)");
1366 else if (advance == -2)
1367 goto trunc;
1368 else
1369 printf("\n\t %s", buf);
1370 break;
1371 default:
1372 TCHECK2(*(tptr-3),tlen);
1373 printf("no SAFI %u decoder",safi);
1374 if (vflag <= 1)
1375 print_unknown_data(tptr-3,"\n\t ",tlen);
1376 advance = 0;
1377 tptr = pptr + len;
1378 break;
1379 }
1380 break;
1381
1382 default:
1383 TCHECK2(*(tptr-3),tlen);
1384 printf("\n\t no AFI %u decoder",af);
1385 if (vflag <= 1)
1386 print_unknown_data(tptr-3,"\n\t ",tlen);
1387 advance = 0;
1388 tptr = pptr + len;
1389 break;
1390 }
1391
1392 tptr += advance;
1393 }
1394 break;
1395 case BGPTYPE_EXTD_COMMUNITIES:
1396 if (len % 8) {
1397 printf("invalid len");
1398 break;
1399 }
1400 while (tlen>0) {
1401 u_int16_t extd_comm;
1402
1403 TCHECK2(tptr[0], 2);
1404 extd_comm=EXTRACT_16BITS(tptr);
1405
1406 printf("\n\t %s (0x%04x), Flags [%s]",
1407 tok2strbuf(bgp_extd_comm_subtype_values,
1408 "unknown extd community typecode",
1409 extd_comm, tokbuf, sizeof(tokbuf)),
1410 extd_comm,
1411 bittok2str(bgp_extd_comm_flag_values, "none", extd_comm));
1412
1413 TCHECK2(*(tptr+2), 6);
1414 switch(extd_comm) {
1415 case BGP_EXT_COM_RT_0:
1416 case BGP_EXT_COM_RO_0:
1417 printf(": %u:%s",
1418 EXTRACT_16BITS(tptr+2),
1419 getname(tptr+4));
1420 break;
1421 case BGP_EXT_COM_RT_1:
1422 case BGP_EXT_COM_RO_1:
1423 printf(": %s:%u",
1424 getname(tptr+2),
1425 EXTRACT_16BITS(tptr+6));
1426 break;
1427 case BGP_EXT_COM_RT_2:
1428 case BGP_EXT_COM_RO_2:
1429 printf(": %u:%u",
1430 EXTRACT_32BITS(tptr+2),
1431 EXTRACT_16BITS(tptr+6));
1432 break;
1433 case BGP_EXT_COM_LINKBAND:
1434 bw.i = EXTRACT_32BITS(tptr+2);
1435 printf(": bandwidth: %.3f Mbps",
1436 bw.f*8/1000000);
1437 break;
1438 case BGP_EXT_COM_CISCO_MCAST:
1439 printf(": AS %u, group %s",
1440 EXTRACT_16BITS(tptr+2),
1441 getname(tptr+4));
1442 break;
1443 case BGP_EXT_COM_VPN_ORIGIN:
1444 case BGP_EXT_COM_VPN_ORIGIN2:
1445 case BGP_EXT_COM_VPN_ORIGIN3:
1446 case BGP_EXT_COM_VPN_ORIGIN4:
1447 case BGP_EXT_COM_OSPF_RID:
1448 case BGP_EXT_COM_OSPF_RID2:
1449 printf("%s", getname(tptr+2));
1450 break;
1451 case BGP_EXT_COM_OSPF_RTYPE:
1452 case BGP_EXT_COM_OSPF_RTYPE2:
1453 printf(": area:%s, router-type:%s, metric-type:%s%s",
1454 getname(tptr+2),
1455 tok2strbuf(bgp_extd_comm_ospf_rtype_values,
1456 "unknown (0x%02x)",
1457 *(tptr+6),
1458 tokbuf, sizeof(tokbuf)),
1459 (*(tptr+7) & BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "",
1460 (*(tptr+6) == (BGP_OSPF_RTYPE_EXT ||BGP_OSPF_RTYPE_NSSA )) ? "E1" : "");
1461 break;
1462 case BGP_EXT_COM_L2INFO:
1463 printf(": %s Control Flags [0x%02x]:MTU %u",
1464 tok2strbuf(bgp_l2vpn_encaps_values,
1465 "unknown encaps",
1466 *(tptr+2),
1467 tokbuf, sizeof(tokbuf)),
1468 *(tptr+3),
1469 EXTRACT_16BITS(tptr+4));
1470 break;
1471 default:
1472 print_unknown_data(tptr,"\n\t ",8);
1473 break;
1474 }
1475 tlen -=8;
1476 tptr +=8;
1477 }
1478 break;
1479
1480 case BGPTYPE_ATTR_SET:
1481 TCHECK2(tptr[0], 4);
1482 printf("\n\t Origin AS: %u", EXTRACT_32BITS(tptr));
1483 tptr+=4;
1484 len -=4;
1485
1486 while (len >= 2 ) {
1487 int alen;
1488 struct bgp_attr bgpa;
1489
1490 TCHECK2(tptr[0], sizeof(bgpa));
1491 memcpy(&bgpa, tptr, sizeof(bgpa));
1492 alen = bgp_attr_len(&bgpa);
1493 tptr += bgp_attr_off(&bgpa);
1494 len -= bgp_attr_off(&bgpa);
1495
1496 printf("\n\t %s (%u), length: %u",
1497 tok2strbuf(bgp_attr_values,
1498 "Unknown Attribute", bgpa.bgpa_type,
1499 tokbuf, sizeof(tokbuf)),
1500 bgpa.bgpa_type,
1501 alen);
1502
1503 if (bgpa.bgpa_flags) {
1504 printf(", Flags [%s%s%s%s",
1505 bgpa.bgpa_flags & 0x80 ? "O" : "",
1506 bgpa.bgpa_flags & 0x40 ? "T" : "",
1507 bgpa.bgpa_flags & 0x20 ? "P" : "",
1508 bgpa.bgpa_flags & 0x10 ? "E" : "");
1509 if (bgpa.bgpa_flags & 0xf)
1510 printf("+%x", bgpa.bgpa_flags & 0xf);
1511 printf("]: ");
1512 }
1513 /* FIXME check for recursion */
1514 if (!bgp_attr_print(&bgpa, tptr, alen))
1515 return 0;
1516 tptr += alen;
1517 len -= alen;
1518 }
1519 break;
1520
1521
1522 default:
1523 TCHECK2(*pptr,len);
1524 printf("\n\t no Attribute %u decoder",attr->bgpa_type); /* we have no decoder for the attribute */
1525 if (vflag <= 1)
1526 print_unknown_data(pptr,"\n\t ",len);
1527 break;
1528 }
1529 if (vflag > 1 && len) /* omit zero length attributes*/
1530 print_unknown_data(pptr,"\n\t ",len);
1531 return 1;
1532
1533 trunc:
1534 return 0;
1535 }
1536
1537 static void
1538 bgp_open_print(const u_char *dat, int length)
1539 {
1540 struct bgp_open bgpo;
1541 struct bgp_opt bgpopt;
1542 int hlen;
1543 const u_char *opt;
1544 int i,cap_type,cap_len,tcap_len,cap_offset;
1545 char tokbuf[TOKBUFSIZE];
1546 char tokbuf2[TOKBUFSIZE];
1547
1548 TCHECK2(dat[0], BGP_OPEN_SIZE);
1549 memcpy(&bgpo, dat, BGP_OPEN_SIZE);
1550 hlen = ntohs(bgpo.bgpo_len);
1551
1552 printf("\n\t Version %d, ", bgpo.bgpo_version);
1553 printf("my AS %u, ", ntohs(bgpo.bgpo_myas));
1554 printf("Holdtime %us, ", ntohs(bgpo.bgpo_holdtime));
1555 printf("ID %s", getname((u_char *)&bgpo.bgpo_id));
1556 printf("\n\t Optional parameters, length: %u", bgpo.bgpo_optlen);
1557
1558 /* some little sanity checking */
1559 if (length < bgpo.bgpo_optlen+BGP_OPEN_SIZE)
1560 return;
1561
1562 /* ugly! */
1563 opt = &((const struct bgp_open *)dat)->bgpo_optlen;
1564 opt++;
1565
1566 i = 0;
1567 while (i < bgpo.bgpo_optlen) {
1568 TCHECK2(opt[i], BGP_OPT_SIZE);
1569 memcpy(&bgpopt, &opt[i], BGP_OPT_SIZE);
1570 if (i + 2 + bgpopt.bgpopt_len > bgpo.bgpo_optlen) {
1571 printf("\n\t Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len);
1572 break;
1573 }
1574
1575 printf("\n\t Option %s (%u), length: %u",
1576 tok2strbuf(bgp_opt_values,"Unknown",
1577 bgpopt.bgpopt_type,
1578 tokbuf, sizeof(tokbuf)),
1579 bgpopt.bgpopt_type,
1580 bgpopt.bgpopt_len);
1581
1582 /* now lets decode the options we know*/
1583 switch(bgpopt.bgpopt_type) {
1584 case BGP_OPT_CAP:
1585 cap_type=opt[i+BGP_OPT_SIZE];
1586 cap_len=opt[i+BGP_OPT_SIZE+1];
1587 tcap_len=cap_len;
1588 printf("\n\t %s (%u), length: %u",
1589 tok2strbuf(bgp_capcode_values, "Unknown",
1590 cap_type, tokbuf, sizeof(tokbuf)),
1591 cap_type,
1592 cap_len);
1593 switch(cap_type) {
1594 case BGP_CAPCODE_MP:
1595 printf("\n\t\tAFI %s (%u), SAFI %s (%u)",
1596 tok2strbuf(bgp_afi_values, "Unknown",
1597 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1598 tokbuf, sizeof(tokbuf)),
1599 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1600 tok2strbuf(bgp_safi_values, "Unknown",
1601 opt[i+BGP_OPT_SIZE+5],
1602 tokbuf, sizeof(tokbuf)),
1603 opt[i+BGP_OPT_SIZE+5]);
1604 break;
1605 case BGP_CAPCODE_RESTART:
1606 printf("\n\t\tRestart Flags: [%s], Restart Time %us",
1607 ((opt[i+BGP_OPT_SIZE+2])&0x80) ? "R" : "none",
1608 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2)&0xfff);
1609 tcap_len-=2;
1610 cap_offset=4;
1611 while(tcap_len>=4) {
1612 printf("\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s",
1613 tok2strbuf(bgp_afi_values,"Unknown",
1614 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1615 tokbuf, sizeof(tokbuf)),
1616 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1617 tok2strbuf(bgp_safi_values,"Unknown",
1618 opt[i+BGP_OPT_SIZE+cap_offset+2],
1619 tokbuf2, sizeof(tokbuf2)),
1620 opt[i+BGP_OPT_SIZE+cap_offset+2],
1621 ((opt[i+BGP_OPT_SIZE+cap_offset+3])&0x80) ? "yes" : "no" );
1622 tcap_len-=4;
1623 cap_offset+=4;
1624 }
1625 break;
1626 case BGP_CAPCODE_RR:
1627 case BGP_CAPCODE_RR_CISCO:
1628 break;
1629 default:
1630 printf("\n\t\tno decoder for Capability %u",
1631 cap_type);
1632 if (vflag <= 1)
1633 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
1634 break;
1635 }
1636 if (vflag > 1)
1637 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
1638 break;
1639 case BGP_OPT_AUTH:
1640 default:
1641 printf("\n\t no decoder for option %u",
1642 bgpopt.bgpopt_type);
1643 break;
1644 }
1645
1646 i += BGP_OPT_SIZE + bgpopt.bgpopt_len;
1647 }
1648 return;
1649 trunc:
1650 printf("[|BGP]");
1651 }
1652
1653 static void
1654 bgp_update_print(const u_char *dat, int length)
1655 {
1656 struct bgp bgp;
1657 struct bgp_attr bgpa;
1658 int hlen;
1659 const u_char *p;
1660 int len;
1661 int i;
1662 char tokbuf[TOKBUFSIZE];
1663
1664 TCHECK2(dat[0], BGP_SIZE);
1665 memcpy(&bgp, dat, BGP_SIZE);
1666 hlen = ntohs(bgp.bgp_len);
1667 p = dat + BGP_SIZE; /*XXX*/
1668
1669 /* Unfeasible routes */
1670 len = EXTRACT_16BITS(p);
1671 if (len) {
1672 /*
1673 * Without keeping state from the original NLRI message,
1674 * it's not possible to tell if this a v4 or v6 route,
1675 * so only try to decode it if we're not v6 enabled.
1676 */
1677 #ifdef INET6
1678 printf("\n\t Withdrawn routes: %d bytes", len);
1679 #else
1680 char buf[MAXHOSTNAMELEN + 100];
1681 int wpfx;
1682
1683 TCHECK2(p[2], len);
1684 i = 2;
1685
1686 printf("\n\t Withdrawn routes:");
1687
1688 while(i < 2 + len) {
1689 wpfx = decode_prefix4(&p[i], buf, sizeof(buf));
1690 if (wpfx == -1) {
1691 printf("\n\t (illegal prefix length)");
1692 break;
1693 } else if (wpfx == -2)
1694 goto trunc;
1695 else {
1696 i += wpfx;
1697 printf("\n\t %s", buf);
1698 }
1699 }
1700 #endif
1701 }
1702 p += 2 + len;
1703
1704 TCHECK2(p[0], 2);
1705 len = EXTRACT_16BITS(p);
1706 if (len) {
1707 /* do something more useful!*/
1708 i = 2;
1709 while (i < 2 + len) {
1710 int alen, aoff;
1711
1712 TCHECK2(p[i], sizeof(bgpa));
1713 memcpy(&bgpa, &p[i], sizeof(bgpa));
1714 alen = bgp_attr_len(&bgpa);
1715 aoff = bgp_attr_off(&bgpa);
1716
1717 printf("\n\t %s (%u), length: %u",
1718 tok2strbuf(bgp_attr_values, "Unknown Attribute",
1719 bgpa.bgpa_type,
1720 tokbuf, sizeof(tokbuf)),
1721 bgpa.bgpa_type,
1722 alen);
1723
1724 if (bgpa.bgpa_flags) {
1725 printf(", Flags [%s%s%s%s",
1726 bgpa.bgpa_flags & 0x80 ? "O" : "",
1727 bgpa.bgpa_flags & 0x40 ? "T" : "",
1728 bgpa.bgpa_flags & 0x20 ? "P" : "",
1729 bgpa.bgpa_flags & 0x10 ? "E" : "");
1730 if (bgpa.bgpa_flags & 0xf)
1731 printf("+%x", bgpa.bgpa_flags & 0xf);
1732 printf("]: ");
1733 }
1734 if (!bgp_attr_print(&bgpa, &p[i + aoff], alen))
1735 goto trunc;
1736 i += aoff + alen;
1737 }
1738 }
1739 p += 2 + len;
1740
1741 if (dat + length > p) {
1742 printf("\n\t Updated routes:");
1743 while (dat + length > p) {
1744 char buf[MAXHOSTNAMELEN + 100];
1745 i = decode_prefix4(p, buf, sizeof(buf));
1746 if (i == -1)
1747 printf("\n\t (illegal prefix length)");
1748 else if (i == -2)
1749 goto trunc;
1750 else {
1751 printf("\n\t %s", buf);
1752 p += i;
1753 }
1754 }
1755 }
1756 return;
1757 trunc:
1758 printf("[|BGP]");
1759 }
1760
1761 static void
1762 bgp_notification_print(const u_char *dat, int length)
1763 {
1764 struct bgp_notification bgpn;
1765 int hlen;
1766 const u_char *tptr;
1767 char tokbuf[TOKBUFSIZE];
1768 char tokbuf2[TOKBUFSIZE];
1769
1770 TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
1771 memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
1772 hlen = ntohs(bgpn.bgpn_len);
1773
1774 /* some little sanity checking */
1775 if (length<BGP_NOTIFICATION_SIZE)
1776 return;
1777
1778 printf(", %s (%u)",
1779 tok2strbuf(bgp_notify_major_values, "Unknown Error",
1780 bgpn.bgpn_major, tokbuf, sizeof(tokbuf)),
1781 bgpn.bgpn_major);
1782
1783 switch (bgpn.bgpn_major) {
1784
1785 case BGP_NOTIFY_MAJOR_MSG:
1786 printf(", subcode %s (%u)",
1787 tok2strbuf(bgp_notify_minor_msg_values, "Unknown",
1788 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1789 bgpn.bgpn_minor);
1790 break;
1791 case BGP_NOTIFY_MAJOR_OPEN:
1792 printf(", subcode %s (%u)",
1793 tok2strbuf(bgp_notify_minor_open_values, "Unknown",
1794 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1795 bgpn.bgpn_minor);
1796 break;
1797 case BGP_NOTIFY_MAJOR_UPDATE:
1798 printf(", subcode %s (%u)",
1799 tok2strbuf(bgp_notify_minor_update_values, "Unknown",
1800 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1801 bgpn.bgpn_minor);
1802 break;
1803 case BGP_NOTIFY_MAJOR_CAP:
1804 printf(" subcode %s (%u)",
1805 tok2strbuf(bgp_notify_minor_cap_values, "Unknown",
1806 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1807 bgpn.bgpn_minor);
1808 case BGP_NOTIFY_MAJOR_CEASE:
1809 printf(", subcode %s (%u)",
1810 tok2strbuf(bgp_notify_minor_cease_values, "Unknown",
1811 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1812 bgpn.bgpn_minor);
1813
1814 /* draft-ietf-idr-cease-subcode-02 mentions optionally 7 bytes
1815 * for the maxprefix subtype, which may contain AFI, SAFI and MAXPREFIXES
1816 */
1817 if(bgpn.bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= BGP_NOTIFICATION_SIZE + 7) {
1818 tptr = dat + BGP_NOTIFICATION_SIZE;
1819 TCHECK2(*tptr, 7);
1820 printf(", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
1821 tok2strbuf(bgp_afi_values, "Unknown",
1822 EXTRACT_16BITS(tptr), tokbuf, sizeof(tokbuf)),
1823 EXTRACT_16BITS(tptr),
1824 tok2strbuf(bgp_safi_values, "Unknown", *(tptr+2),
1825 tokbuf2, sizeof(tokbuf)),
1826 *(tptr+2),
1827 EXTRACT_32BITS(tptr+3));
1828 }
1829 break;
1830 default:
1831 break;
1832 }
1833
1834 return;
1835 trunc:
1836 printf("[|BGP]");
1837 }
1838
1839 static void
1840 bgp_route_refresh_print(const u_char *pptr, int len) {
1841
1842 const struct bgp_route_refresh *bgp_route_refresh_header;
1843 char tokbuf[TOKBUFSIZE];
1844 char tokbuf2[TOKBUFSIZE];
1845
1846 bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
1847
1848 printf("\n\t AFI %s (%u), SAFI %s (%u)",
1849 tok2strbuf(bgp_afi_values,"Unknown",
1850 /* this stinks but the compiler pads the structure
1851 * weird */
1852 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
1853 tokbuf, sizeof(tokbuf)),
1854 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
1855 tok2strbuf(bgp_safi_values,"Unknown",
1856 bgp_route_refresh_header->safi,
1857 tokbuf2, sizeof(tokbuf2)),
1858 bgp_route_refresh_header->safi);
1859
1860 if (vflag > 1)
1861 print_unknown_data(pptr,"\n\t ", len);
1862
1863 return;
1864 }
1865
1866 static int
1867 bgp_header_print(const u_char *dat, int length)
1868 {
1869 struct bgp bgp;
1870 char tokbuf[TOKBUFSIZE];
1871
1872 TCHECK2(dat[0], BGP_SIZE);
1873 memcpy(&bgp, dat, BGP_SIZE);
1874 printf("\n\t%s Message (%u), length: %u",
1875 tok2strbuf(bgp_msg_values, "Unknown", bgp.bgp_type,
1876 tokbuf, sizeof(tokbuf)),
1877 bgp.bgp_type,
1878 length);
1879
1880 switch (bgp.bgp_type) {
1881 case BGP_OPEN:
1882 bgp_open_print(dat, length);
1883 break;
1884 case BGP_UPDATE:
1885 bgp_update_print(dat, length);
1886 break;
1887 case BGP_NOTIFICATION:
1888 bgp_notification_print(dat, length);
1889 break;
1890 case BGP_KEEPALIVE:
1891 break;
1892 case BGP_ROUTE_REFRESH:
1893 bgp_route_refresh_print(dat, length);
1894 break;
1895 default:
1896 /* we have no decoder for the BGP message */
1897 printf("\n\t no Message %u decoder",bgp.bgp_type);
1898 print_unknown_data(dat,"\n\t ",length);
1899 break;
1900 }
1901 return 1;
1902 trunc:
1903 printf("[|BGP]");
1904 return 0;
1905 }
1906
1907 void
1908 bgp_print(const u_char *dat, int length)
1909 {
1910 const u_char *p;
1911 const u_char *ep;
1912 const u_char *start;
1913 const u_char marker[] = {
1914 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1915 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1916 };
1917 struct bgp bgp;
1918 u_int16_t hlen;
1919 char tokbuf[TOKBUFSIZE];
1920
1921 ep = dat + length;
1922 if (snapend < dat + length)
1923 ep = snapend;
1924
1925 printf(": BGP, length: %u",length);
1926
1927 if (vflag < 1) /* lets be less chatty */
1928 return;
1929
1930 p = dat;
1931 start = p;
1932 while (p < snapend) {
1933 if (!TTEST2(p[0], 1))
1934 break;
1935 if (p[0] != 0xff) {
1936 p++;
1937 continue;
1938 }
1939
1940 if (!TTEST2(p[0], sizeof(marker)))
1941 break;
1942 if (memcmp(p, marker, sizeof(marker)) != 0) {
1943 p++;
1944 continue;
1945 }
1946
1947 /* found BGP header */
1948 TCHECK2(p[0], BGP_SIZE); /*XXX*/
1949 memcpy(&bgp, p, BGP_SIZE);
1950
1951 if (start != p)
1952 printf(" [|BGP]");
1953
1954 hlen = ntohs(bgp.bgp_len);
1955 if (hlen < BGP_SIZE) {
1956 printf("\n[|BGP Bogus header length %u < %u]", hlen,
1957 BGP_SIZE);
1958 break;
1959 }
1960
1961 if (TTEST2(p[0], hlen)) {
1962 if (!bgp_header_print(p, hlen))
1963 return;
1964 p += hlen;
1965 start = p;
1966 } else {
1967 printf("\n[|BGP %s]",
1968 tok2strbuf(bgp_msg_values,
1969 "Unknown Message Type",
1970 bgp.bgp_type,
1971 tokbuf, sizeof(tokbuf)));
1972 break;
1973 }
1974 }
1975
1976 return;
1977
1978 trunc:
1979 printf(" [|BGP]");
1980 }
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