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Add missing af.c and af.h files.
[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 1.101 2006-02-21 10:27:40 hannes Exp $";
40 #endif
41
42 #include <tcpdump-stdinc.h>
43
44 #include <stdio.h>
45 #include <string.h>
46
47 #include "interface.h"
48 #include "decode_prefix.h"
49 #include "addrtoname.h"
50 #include "extract.h"
51 #include "bgp.h"
52 #include "af.h"
53 #include "l2vpn.h"
54
55 struct bgp {
56 u_int8_t bgp_marker[16];
57 u_int16_t bgp_len;
58 u_int8_t bgp_type;
59 };
60 #define BGP_SIZE 19 /* unaligned */
61
62 #define BGP_OPEN 1
63 #define BGP_UPDATE 2
64 #define BGP_NOTIFICATION 3
65 #define BGP_KEEPALIVE 4
66 #define BGP_ROUTE_REFRESH 5
67
68 static struct tok bgp_msg_values[] = {
69 { BGP_OPEN, "Open"},
70 { BGP_UPDATE, "Update"},
71 { BGP_NOTIFICATION, "Notification"},
72 { BGP_KEEPALIVE, "Keepalive"},
73 { BGP_ROUTE_REFRESH, "Route Refresh"},
74 { 0, NULL}
75 };
76
77 struct bgp_open {
78 u_int8_t bgpo_marker[16];
79 u_int16_t bgpo_len;
80 u_int8_t bgpo_type;
81 u_int8_t bgpo_version;
82 u_int16_t bgpo_myas;
83 u_int16_t bgpo_holdtime;
84 u_int32_t bgpo_id;
85 u_int8_t bgpo_optlen;
86 /* options should follow */
87 };
88 #define BGP_OPEN_SIZE 29 /* unaligned */
89
90 struct bgp_opt {
91 u_int8_t bgpopt_type;
92 u_int8_t bgpopt_len;
93 /* variable length */
94 };
95 #define BGP_OPT_SIZE 2 /* some compilers may pad to 4 bytes */
96
97 #define BGP_UPDATE_MINSIZE 23
98
99 struct bgp_notification {
100 u_int8_t bgpn_marker[16];
101 u_int16_t bgpn_len;
102 u_int8_t bgpn_type;
103 u_int8_t bgpn_major;
104 u_int8_t bgpn_minor;
105 };
106 #define BGP_NOTIFICATION_SIZE 21 /* unaligned */
107
108 struct bgp_route_refresh {
109 u_int8_t bgp_marker[16];
110 u_int16_t len;
111 u_int8_t type;
112 u_int8_t afi[2]; /* the compiler messes this structure up */
113 u_int8_t res; /* when doing misaligned sequences of int8 and int16 */
114 u_int8_t safi; /* afi should be int16 - so we have to access it using */
115 }; /* EXTRACT_16BITS(&bgp_route_refresh->afi) (sigh) */
116 #define BGP_ROUTE_REFRESH_SIZE 23
117
118 struct bgp_attr {
119 u_int8_t bgpa_flags;
120 u_int8_t bgpa_type;
121 union {
122 u_int8_t len;
123 u_int16_t elen;
124 } bgpa_len;
125 #define bgp_attr_len(p) \
126 (((p)->bgpa_flags & 0x10) ? \
127 EXTRACT_16BITS(&(p)->bgpa_len.elen) : (p)->bgpa_len.len)
128 #define bgp_attr_off(p) \
129 (((p)->bgpa_flags & 0x10) ? 4 : 3)
130 };
131
132 #define BGPTYPE_ORIGIN 1
133 #define BGPTYPE_AS_PATH 2
134 #define BGPTYPE_NEXT_HOP 3
135 #define BGPTYPE_MULTI_EXIT_DISC 4
136 #define BGPTYPE_LOCAL_PREF 5
137 #define BGPTYPE_ATOMIC_AGGREGATE 6
138 #define BGPTYPE_AGGREGATOR 7
139 #define BGPTYPE_COMMUNITIES 8 /* RFC1997 */
140 #define BGPTYPE_ORIGINATOR_ID 9 /* RFC1998 */
141 #define BGPTYPE_CLUSTER_LIST 10 /* RFC1998 */
142 #define BGPTYPE_DPA 11 /* draft-ietf-idr-bgp-dpa */
143 #define BGPTYPE_ADVERTISERS 12 /* RFC1863 */
144 #define BGPTYPE_RCID_PATH 13 /* RFC1863 */
145 #define BGPTYPE_MP_REACH_NLRI 14 /* RFC2283 */
146 #define BGPTYPE_MP_UNREACH_NLRI 15 /* RFC2283 */
147 #define BGPTYPE_EXTD_COMMUNITIES 16 /* draft-ietf-idr-bgp-ext-communities */
148 #define BGPTYPE_ATTR_SET 128 /* draft-marques-ppvpn-ibgp */
149
150 #define BGP_MP_NLRI_MINSIZE 3 /* End of RIB Marker detection */
151
152 static struct tok bgp_attr_values[] = {
153 { BGPTYPE_ORIGIN, "Origin"},
154 { BGPTYPE_AS_PATH, "AS Path"},
155 { BGPTYPE_NEXT_HOP, "Next Hop"},
156 { BGPTYPE_MULTI_EXIT_DISC, "Multi Exit Discriminator"},
157 { BGPTYPE_LOCAL_PREF, "Local Preference"},
158 { BGPTYPE_ATOMIC_AGGREGATE, "Atomic Aggregate"},
159 { BGPTYPE_AGGREGATOR, "Aggregator"},
160 { BGPTYPE_COMMUNITIES, "Community"},
161 { BGPTYPE_ORIGINATOR_ID, "Originator ID"},
162 { BGPTYPE_CLUSTER_LIST, "Cluster List"},
163 { BGPTYPE_DPA, "DPA"},
164 { BGPTYPE_ADVERTISERS, "Advertisers"},
165 { BGPTYPE_RCID_PATH, "RCID Path / Cluster ID"},
166 { BGPTYPE_MP_REACH_NLRI, "Multi-Protocol Reach NLRI"},
167 { BGPTYPE_MP_UNREACH_NLRI, "Multi-Protocol Unreach NLRI"},
168 { BGPTYPE_EXTD_COMMUNITIES, "Extended Community"},
169 { BGPTYPE_ATTR_SET, "Attribute Set"},
170 { 255, "Reserved for development"},
171 { 0, NULL}
172 };
173
174 #define BGP_AS_SET 1
175 #define BGP_AS_SEQUENCE 2
176 #define BGP_CONFED_AS_SEQUENCE 3 /* draft-ietf-idr-rfc3065bis-01 */
177 #define BGP_CONFED_AS_SET 4 /* draft-ietf-idr-rfc3065bis-01 */
178
179 static struct tok bgp_as_path_segment_open_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 static struct tok bgp_as_path_segment_close_values[] = {
188 { BGP_AS_SEQUENCE, ""},
189 { BGP_AS_SET, "}"},
190 { BGP_CONFED_AS_SEQUENCE, ")"},
191 { BGP_CONFED_AS_SET, "})"},
192 { 0, NULL}
193 };
194
195 #define BGP_OPT_AUTH 1
196 #define BGP_OPT_CAP 2
197
198
199 static struct tok bgp_opt_values[] = {
200 { BGP_OPT_AUTH, "Authentication Information"},
201 { BGP_OPT_CAP, "Capabilities Advertisement"},
202 { 0, NULL}
203 };
204
205 #define BGP_CAPCODE_MP 1
206 #define BGP_CAPCODE_RR 2
207 #define BGP_CAPCODE_ORF 3 /* XXX */
208 #define BGP_CAPCODE_RESTART 64 /* draft-ietf-idr-restart-05 */
209 #define BGP_CAPCODE_AS_NEW 65 /* XXX */
210 #define BGP_CAPCODE_DYN_CAP 67 /* XXX */
211 #define BGP_CAPCODE_RR_CISCO 128
212
213 static struct tok bgp_capcode_values[] = {
214 { BGP_CAPCODE_MP, "Multiprotocol Extensions"},
215 { BGP_CAPCODE_RR, "Route Refresh"},
216 { BGP_CAPCODE_ORF, "Cooperative Route Filtering"},
217 { BGP_CAPCODE_RESTART, "Graceful Restart"},
218 { BGP_CAPCODE_AS_NEW, "32-Bit AS Number"},
219 { BGP_CAPCODE_DYN_CAP, "Dynamic Capability"},
220 { BGP_CAPCODE_RR_CISCO, "Route Refresh (Cisco)"},
221 { 0, NULL}
222 };
223
224 #define BGP_NOTIFY_MAJOR_MSG 1
225 #define BGP_NOTIFY_MAJOR_OPEN 2
226 #define BGP_NOTIFY_MAJOR_UPDATE 3
227 #define BGP_NOTIFY_MAJOR_HOLDTIME 4
228 #define BGP_NOTIFY_MAJOR_FSM 5
229 #define BGP_NOTIFY_MAJOR_CEASE 6
230 #define BGP_NOTIFY_MAJOR_CAP 7
231
232 static struct tok bgp_notify_major_values[] = {
233 { BGP_NOTIFY_MAJOR_MSG, "Message Header Error"},
234 { BGP_NOTIFY_MAJOR_OPEN, "OPEN Message Error"},
235 { BGP_NOTIFY_MAJOR_UPDATE, "UPDATE Message Error"},
236 { BGP_NOTIFY_MAJOR_HOLDTIME,"Hold Timer Expired"},
237 { BGP_NOTIFY_MAJOR_FSM, "Finite State Machine Error"},
238 { BGP_NOTIFY_MAJOR_CEASE, "Cease"},
239 { BGP_NOTIFY_MAJOR_CAP, "Capability Message Error"},
240 { 0, NULL}
241 };
242
243 /* draft-ietf-idr-cease-subcode-02 */
244 #define BGP_NOTIFY_MINOR_CEASE_MAXPRFX 1
245 static struct tok bgp_notify_minor_cease_values[] = {
246 { BGP_NOTIFY_MINOR_CEASE_MAXPRFX, "Maximum Number of Prefixes Reached"},
247 { 2, "Administratively Shutdown"},
248 { 3, "Peer Unconfigured"},
249 { 4, "Administratively Reset"},
250 { 5, "Connection Rejected"},
251 { 6, "Other Configuration Change"},
252 { 7, "Connection Collision Resolution"},
253 { 0, NULL}
254 };
255
256 static struct tok bgp_notify_minor_msg_values[] = {
257 { 1, "Connection Not Synchronized"},
258 { 2, "Bad Message Length"},
259 { 3, "Bad Message Type"},
260 { 0, NULL}
261 };
262
263 static struct tok bgp_notify_minor_open_values[] = {
264 { 1, "Unsupported Version Number"},
265 { 2, "Bad Peer AS"},
266 { 3, "Bad BGP Identifier"},
267 { 4, "Unsupported Optional Parameter"},
268 { 5, "Authentication Failure"},
269 { 6, "Unacceptable Hold Time"},
270 { 0, NULL}
271 };
272
273 static struct tok bgp_notify_minor_update_values[] = {
274 { 1, "Malformed Attribute List"},
275 { 2, "Unrecognized Well-known Attribute"},
276 { 3, "Missing Well-known Attribute"},
277 { 4, "Attribute Flags Error"},
278 { 5, "Attribute Length Error"},
279 { 6, "Invalid ORIGIN Attribute"},
280 { 7, "AS Routing Loop"},
281 { 8, "Invalid NEXT_HOP Attribute"},
282 { 9, "Optional Attribute Error"},
283 { 10, "Invalid Network Field"},
284 { 11, "Malformed AS_PATH"},
285 { 0, NULL}
286 };
287
288 static struct tok bgp_notify_minor_cap_values[] = {
289 { 1, "Invalid Action Value" },
290 { 2, "Invalid Capability Length" },
291 { 3, "Malformed Capability Value" },
292 { 4, "Unsupported Capability Code" },
293 { 0, NULL }
294 };
295
296 static struct tok bgp_origin_values[] = {
297 { 0, "IGP"},
298 { 1, "EGP"},
299 { 2, "Incomplete"},
300 { 0, NULL}
301 };
302
303 /* Subsequent address family identifier, RFC2283 section 7 */
304 #define SAFNUM_RES 0
305 #define SAFNUM_UNICAST 1
306 #define SAFNUM_MULTICAST 2
307 #define SAFNUM_UNIMULTICAST 3
308 /* labeled BGP RFC3107 */
309 #define SAFNUM_LABUNICAST 4
310 #define SAFNUM_TUNNEL 64 /* XXX */
311 #define SAFNUM_VPLS 65 /* XXX */
312 #define SAFNUM_MDT 66 /* XXX */
313 /* Section 4.3.4 of draft-rosen-rfc2547bis-03.txt */
314 #define SAFNUM_VPNUNICAST 128
315 #define SAFNUM_VPNMULTICAST 129
316 #define SAFNUM_VPNUNIMULTICAST 130
317 /* draft-marques-ppvpn-rt-constrain-01.txt */
318 #define SAFNUM_RT_ROUTING_INFO 132
319
320 #define BGP_VPN_RD_LEN 8
321
322 static struct tok bgp_safi_values[] = {
323 { SAFNUM_RES, "Reserved"},
324 { SAFNUM_UNICAST, "Unicast"},
325 { SAFNUM_MULTICAST, "Multicast"},
326 { SAFNUM_UNIMULTICAST, "Unicast+Multicast"},
327 { SAFNUM_LABUNICAST, "labeled Unicast"},
328 { SAFNUM_TUNNEL, "Tunnel"},
329 { SAFNUM_VPLS, "VPLS"},
330 { SAFNUM_MDT, "MDT"},
331 { SAFNUM_VPNUNICAST, "labeled VPN Unicast"},
332 { SAFNUM_VPNMULTICAST, "labeled VPN Multicast"},
333 { SAFNUM_VPNUNIMULTICAST, "labeled VPN Unicast+Multicast"},
334 { SAFNUM_RT_ROUTING_INFO, "Route Target Routing Information"}, /* draft-marques-ppvpn-rt-constrain-01.txt */
335 { 0, NULL }
336 };
337
338 /* well-known community */
339 #define BGP_COMMUNITY_NO_EXPORT 0xffffff01
340 #define BGP_COMMUNITY_NO_ADVERT 0xffffff02
341 #define BGP_COMMUNITY_NO_EXPORT_SUBCONFED 0xffffff03
342
343 /* Extended community type - draft-ietf-idr-bgp-ext-communities-05 */
344 #define BGP_EXT_COM_RT_0 0x0002 /* Route Target,Format AS(2bytes):AN(4bytes) */
345 #define BGP_EXT_COM_RT_1 0x0102 /* Route Target,Format IP address:AN(2bytes) */
346 #define BGP_EXT_COM_RT_2 0x0202 /* Route Target,Format AN(4bytes):local(2bytes) */
347 #define BGP_EXT_COM_RO_0 0x0003 /* Route Origin,Format AS(2bytes):AN(4bytes) */
348 #define BGP_EXT_COM_RO_1 0x0103 /* Route Origin,Format IP address:AN(2bytes) */
349 #define BGP_EXT_COM_RO_2 0x0203 /* Route Origin,Format AN(4bytes):local(2bytes) */
350 #define BGP_EXT_COM_LINKBAND 0x4004 /* Link Bandwidth,Format AS(2B):Bandwidth(4B) */
351 /* rfc2547 bgp-mpls-vpns */
352 #define BGP_EXT_COM_CISCO_MCAST 0x0009 /* cisco proprietary */
353
354 #define BGP_EXT_COM_VPN_ORIGIN 0x0005 /* OSPF Domain ID / VPN of Origin - draft-rosen-vpns-ospf-bgp-mpls */
355 #define BGP_EXT_COM_VPN_ORIGIN2 0x0105 /* duplicate - keep for backwards compatability */
356 #define BGP_EXT_COM_VPN_ORIGIN3 0x0205 /* duplicate - keep for backwards compatability */
357 #define BGP_EXT_COM_VPN_ORIGIN4 0x8005 /* duplicate - keep for backwards compatability */
358
359 #define BGP_EXT_COM_OSPF_RTYPE 0x0306 /* OSPF Route Type,Format Area(4B):RouteType(1B):Options(1B) */
360 #define BGP_EXT_COM_OSPF_RTYPE2 0x8000 /* duplicate - keep for backwards compatability */
361
362 #define BGP_EXT_COM_OSPF_RID 0x0107 /* OSPF Router ID,Format RouterID(4B):Unused(2B) */
363 #define BGP_EXT_COM_OSPF_RID2 0x8001 /* duplicate - keep for backwards compatability */
364
365 #define BGP_EXT_COM_L2INFO 0x800a /* draft-kompella-ppvpn-l2vpn */
366
367 /* http://www.cisco.com/en/US/tech/tk436/tk428/technologies_tech_note09186a00801eb09a.shtml */
368 #define BGP_EXT_COM_EIGRP_GEN 0x8800
369 #define BGP_EXT_COM_EIGRP_METRIC_AS_DELAY 0x8801
370 #define BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW 0x8802
371 #define BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU 0x8803
372 #define BGP_EXT_COM_EIGRP_EXT_REMAS_REMID 0x8804
373 #define BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC 0x8805
374
375 static struct tok bgp_extd_comm_flag_values[] = {
376 { 0x8000, "vendor-specific"},
377 { 0x4000, "non-transitive"},
378 { 0, NULL},
379 };
380
381 static struct tok bgp_extd_comm_subtype_values[] = {
382 { BGP_EXT_COM_RT_0, "target"},
383 { BGP_EXT_COM_RT_1, "target"},
384 { BGP_EXT_COM_RT_2, "target"},
385 { BGP_EXT_COM_RO_0, "origin"},
386 { BGP_EXT_COM_RO_1, "origin"},
387 { BGP_EXT_COM_RO_2, "origin"},
388 { BGP_EXT_COM_LINKBAND, "link-BW"},
389 { BGP_EXT_COM_CISCO_MCAST, "mdt-group"},
390 { BGP_EXT_COM_VPN_ORIGIN, "ospf-domain"},
391 { BGP_EXT_COM_VPN_ORIGIN2, "ospf-domain"},
392 { BGP_EXT_COM_VPN_ORIGIN3, "ospf-domain"},
393 { BGP_EXT_COM_VPN_ORIGIN4, "ospf-domain"},
394 { BGP_EXT_COM_OSPF_RTYPE, "ospf-route-type"},
395 { BGP_EXT_COM_OSPF_RTYPE2, "ospf-route-type"},
396 { BGP_EXT_COM_OSPF_RID, "ospf-router-id"},
397 { BGP_EXT_COM_OSPF_RID2, "ospf-router-id"},
398 { BGP_EXT_COM_L2INFO, "layer2-info"},
399 { BGP_EXT_COM_EIGRP_GEN , "eigrp-general-route (flag, tag)" },
400 { BGP_EXT_COM_EIGRP_METRIC_AS_DELAY , "eigrp-route-metric (AS, delay)" },
401 { BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW , "eigrp-route-metric (reliability, nexthop, bandwidth)" },
402 { BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU , "eigrp-route-metric (load, MTU)" },
403 { BGP_EXT_COM_EIGRP_EXT_REMAS_REMID , "eigrp-external-route (remote-AS, remote-ID)" },
404 { BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC , "eigrp-external-route (remote-proto, remote-metric)" },
405 { 0, NULL},
406 };
407
408 /* OSPF codes for BGP_EXT_COM_OSPF_RTYPE draft-rosen-vpns-ospf-bgp-mpls */
409 #define BGP_OSPF_RTYPE_RTR 1 /* OSPF Router LSA */
410 #define BGP_OSPF_RTYPE_NET 2 /* OSPF Network LSA */
411 #define BGP_OSPF_RTYPE_SUM 3 /* OSPF Summary LSA */
412 #define BGP_OSPF_RTYPE_EXT 5 /* OSPF External LSA, note that ASBR doesn't apply to MPLS-VPN */
413 #define BGP_OSPF_RTYPE_NSSA 7 /* OSPF NSSA External*/
414 #define BGP_OSPF_RTYPE_SHAM 129 /* OSPF-MPLS-VPN Sham link */
415 #define BGP_OSPF_RTYPE_METRIC_TYPE 0x1 /* LSB of RTYPE Options Field */
416
417 static struct tok bgp_extd_comm_ospf_rtype_values[] = {
418 { BGP_OSPF_RTYPE_RTR, "Router" },
419 { BGP_OSPF_RTYPE_NET, "Network" },
420 { BGP_OSPF_RTYPE_SUM, "Summary" },
421 { BGP_OSPF_RTYPE_EXT, "External" },
422 { BGP_OSPF_RTYPE_NSSA,"NSSA External" },
423 { BGP_OSPF_RTYPE_SHAM,"MPLS-VPN Sham" },
424 { 0, NULL },
425 };
426
427 int
428 decode_prefix4(const u_char *pptr, char *buf, u_int buflen)
429 {
430 struct in_addr addr;
431 u_int plen;
432
433 TCHECK(pptr[0]);
434 plen = pptr[0];
435 if (32 < plen)
436 return -1;
437
438 memset(&addr, 0, sizeof(addr));
439 TCHECK2(pptr[1], (plen + 7) / 8);
440 memcpy(&addr, &pptr[1], (plen + 7) / 8);
441 if (plen % 8) {
442 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
443 ((0xff00 >> (plen % 8)) & 0xff);
444 }
445 snprintf(buf, buflen, "%s/%d", getname((u_char *)&addr), plen);
446 return 1 + (plen + 7) / 8;
447
448 trunc:
449 return -2;
450 }
451
452 static int
453 decode_labeled_prefix4(const u_char *pptr, char *buf, u_int buflen)
454 {
455 struct in_addr addr;
456 u_int plen;
457
458 TCHECK(pptr[0]);
459 plen = pptr[0]; /* get prefix length */
460
461 /* this is one of the weirdnesses of rfc3107
462 the label length (actually the label + COS bits)
463 is added to the prefix length;
464 we also do only read out just one label -
465 there is no real application for advertisement of
466 stacked labels in a a single BGP message
467 */
468
469 if (24 > plen)
470 return -1;
471
472 plen-=24; /* adjust prefixlen - labellength */
473
474 if (32 < plen)
475 return -1;
476
477 memset(&addr, 0, sizeof(addr));
478 TCHECK2(pptr[4], (plen + 7) / 8);
479 memcpy(&addr, &pptr[4], (plen + 7) / 8);
480 if (plen % 8) {
481 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
482 ((0xff00 >> (plen % 8)) & 0xff);
483 }
484 /* the label may get offsetted by 4 bits so lets shift it right */
485 snprintf(buf, buflen, "%s/%d, label:%u %s",
486 getname((u_char *)&addr),
487 plen,
488 EXTRACT_24BITS(pptr+1)>>4,
489 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
490
491 return 4 + (plen + 7) / 8;
492
493 trunc:
494 return -2;
495 }
496
497 /* RDs and RTs share the same semantics
498 * we use bgp_vpn_rd_print for
499 * printing route targets inside a NLRI */
500 char *
501 bgp_vpn_rd_print (const u_char *pptr) {
502
503 /* allocate space for the largest possible string */
504 static char rd[sizeof("xxxxxxxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")];
505 char *pos = rd;
506
507 /* ok lets load the RD format */
508 switch (EXTRACT_16BITS(pptr)) {
509
510 /* AS:IP-address fmt*/
511 case 0:
512 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u.%u.%u.%u",
513 EXTRACT_16BITS(pptr+2), *(pptr+4), *(pptr+5), *(pptr+6), *(pptr+7));
514 break;
515 /* IP-address:AS fmt*/
516
517 case 1:
518 snprintf(pos, sizeof(rd) - (pos - rd), "%u.%u.%u.%u:%u",
519 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
520 break;
521
522 /* 4-byte-AS:number fmt*/
523 case 2:
524 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u (%u.%u.%u.%u:%u)",
525 EXTRACT_32BITS(pptr+2), EXTRACT_16BITS(pptr+6),
526 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
527 break;
528 default:
529 snprintf(pos, sizeof(rd) - (pos - rd), "unknown RD format");
530 break;
531 }
532 pos += strlen(pos);
533 *(pos) = '\0';
534 return (rd);
535 }
536
537 static int
538 decode_rt_routing_info(const u_char *pptr, char *buf, u_int buflen)
539 {
540 u_int8_t route_target[8];
541 u_int plen;
542
543 TCHECK(pptr[0]);
544 plen = pptr[0]; /* get prefix length */
545
546 if (0 == plen)
547 return 1; /* default route target */
548
549 if (32 > plen)
550 return -1;
551
552 plen-=32; /* adjust prefix length */
553
554 if (64 < plen)
555 return -1;
556
557 memset(&route_target, 0, sizeof(route_target));
558 TCHECK2(pptr[1], (plen + 7) / 8);
559 memcpy(&route_target, &pptr[1], (plen + 7) / 8);
560 if (plen % 8) {
561 ((u_char *)&route_target)[(plen + 7) / 8 - 1] &=
562 ((0xff00 >> (plen % 8)) & 0xff);
563 }
564 snprintf(buf, buflen, "origin AS: %u, route target %s",
565 EXTRACT_32BITS(pptr+1),
566 bgp_vpn_rd_print((u_char *)&route_target));
567
568 return 5 + (plen + 7) / 8;
569
570 trunc:
571 return -2;
572 }
573
574 static int
575 decode_labeled_vpn_prefix4(const u_char *pptr, char *buf, u_int buflen)
576 {
577 struct in_addr addr;
578 u_int plen;
579
580 TCHECK(pptr[0]);
581 plen = pptr[0]; /* get prefix length */
582
583 if ((24+64) > plen)
584 return -1;
585
586 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
587
588 if (32 < plen)
589 return -1;
590
591 memset(&addr, 0, sizeof(addr));
592 TCHECK2(pptr[12], (plen + 7) / 8);
593 memcpy(&addr, &pptr[12], (plen + 7) / 8);
594 if (plen % 8) {
595 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
596 ((0xff00 >> (plen % 8)) & 0xff);
597 }
598 /* the label may get offsetted by 4 bits so lets shift it right */
599 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
600 bgp_vpn_rd_print(pptr+4),
601 getname((u_char *)&addr),
602 plen,
603 EXTRACT_24BITS(pptr+1)>>4,
604 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
605
606 return 12 + (plen + 7) / 8;
607
608 trunc:
609 return -2;
610 }
611
612 static int
613 decode_labeled_vpn_l2(const u_char *pptr, char *buf, u_int buflen)
614 {
615 int plen,tlen,strlen,tlv_type,tlv_len,ttlv_len;
616
617 TCHECK2(pptr[0], 2);
618 plen=EXTRACT_16BITS(pptr);
619 tlen=plen;
620 pptr+=2;
621 TCHECK2(pptr[0],15);
622 strlen=snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u",
623 bgp_vpn_rd_print(pptr),
624 EXTRACT_16BITS(pptr+8),
625 EXTRACT_16BITS(pptr+10),
626 EXTRACT_24BITS(pptr+12)>>4); /* the label is offsetted by 4 bits so lets shift it right */
627 pptr+=15;
628 tlen-=15;
629
630 /* ok now the variable part - lets read out TLVs*/
631 while (tlen>0) {
632 if (tlen < 3)
633 return -1;
634 TCHECK2(pptr[0], 3);
635 tlv_type=*pptr++;
636 tlv_len=EXTRACT_16BITS(pptr);
637 ttlv_len=tlv_len;
638 pptr+=2;
639
640 switch(tlv_type) {
641 case 1:
642 strlen+=snprintf(buf+strlen,buflen-strlen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
643 tlv_type,
644 tlv_len);
645 ttlv_len=ttlv_len/8+1; /* how many bytes do we need to read ? */
646 while (ttlv_len>0) {
647 TCHECK(pptr[0]);
648 strlen+=snprintf(buf+strlen,buflen-strlen, "%02x",*pptr++);
649 ttlv_len--;
650 }
651 break;
652 default:
653 snprintf(buf+strlen,buflen-strlen, "\n\t\tunknown TLV #%u, length: %u",
654 tlv_type,
655 tlv_len);
656 break;
657 }
658 tlen-=(tlv_len<<3); /* the tlv-length is expressed in bits so lets shift it tright */
659 }
660 return plen+2;
661
662 trunc:
663 return -2;
664 }
665
666 #ifdef INET6
667 int
668 decode_prefix6(const u_char *pd, char *buf, u_int buflen)
669 {
670 struct in6_addr addr;
671 u_int plen;
672
673 TCHECK(pd[0]);
674 plen = pd[0];
675 if (128 < plen)
676 return -1;
677
678 memset(&addr, 0, sizeof(addr));
679 TCHECK2(pd[1], (plen + 7) / 8);
680 memcpy(&addr, &pd[1], (plen + 7) / 8);
681 if (plen % 8) {
682 addr.s6_addr[(plen + 7) / 8 - 1] &=
683 ((0xff00 >> (plen % 8)) & 0xff);
684 }
685 snprintf(buf, buflen, "%s/%d", getname6((u_char *)&addr), plen);
686 return 1 + (plen + 7) / 8;
687
688 trunc:
689 return -2;
690 }
691
692 static int
693 decode_labeled_prefix6(const u_char *pptr, char *buf, u_int buflen)
694 {
695 struct in6_addr addr;
696 u_int plen;
697
698 TCHECK(pptr[0]);
699 plen = pptr[0]; /* get prefix length */
700
701 if (24 > plen)
702 return -1;
703
704 plen-=24; /* adjust prefixlen - labellength */
705
706 if (128 < plen)
707 return -1;
708
709 memset(&addr, 0, sizeof(addr));
710 TCHECK2(pptr[4], (plen + 7) / 8);
711 memcpy(&addr, &pptr[4], (plen + 7) / 8);
712 if (plen % 8) {
713 addr.s6_addr[(plen + 7) / 8 - 1] &=
714 ((0xff00 >> (plen % 8)) & 0xff);
715 }
716 /* the label may get offsetted by 4 bits so lets shift it right */
717 snprintf(buf, buflen, "%s/%d, label:%u %s",
718 getname6((u_char *)&addr),
719 plen,
720 EXTRACT_24BITS(pptr+1)>>4,
721 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
722
723 return 4 + (plen + 7) / 8;
724
725 trunc:
726 return -2;
727 }
728
729 static int
730 decode_labeled_vpn_prefix6(const u_char *pptr, char *buf, u_int buflen)
731 {
732 struct in6_addr addr;
733 u_int plen;
734
735 TCHECK(pptr[0]);
736 plen = pptr[0]; /* get prefix length */
737
738 if ((24+64) > plen)
739 return -1;
740
741 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
742
743 if (128 < plen)
744 return -1;
745
746 memset(&addr, 0, sizeof(addr));
747 TCHECK2(pptr[12], (plen + 7) / 8);
748 memcpy(&addr, &pptr[12], (plen + 7) / 8);
749 if (plen % 8) {
750 addr.s6_addr[(plen + 7) / 8 - 1] &=
751 ((0xff00 >> (plen % 8)) & 0xff);
752 }
753 /* the label may get offsetted by 4 bits so lets shift it right */
754 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
755 bgp_vpn_rd_print(pptr+4),
756 getname6((u_char *)&addr),
757 plen,
758 EXTRACT_24BITS(pptr+1)>>4,
759 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
760
761 return 12 + (plen + 7) / 8;
762
763 trunc:
764 return -2;
765 }
766 #endif
767
768 static int
769 decode_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
770 {
771 u_int8_t addr[19];
772 u_int plen;
773
774 TCHECK(pptr[0]);
775 plen = pptr[0]; /* get prefix length */
776
777 if (152 < plen)
778 return -1;
779
780 memset(&addr, 0, sizeof(addr));
781 TCHECK2(pptr[4], (plen + 7) / 8);
782 memcpy(&addr, &pptr[4], (plen + 7) / 8);
783 if (plen % 8) {
784 addr[(plen + 7) / 8 - 1] &=
785 ((0xff00 >> (plen % 8)) & 0xff);
786 }
787 snprintf(buf, buflen, "%s/%d",
788 isonsap_string(addr,(plen + 7) / 8),
789 plen);
790
791 return 1 + (plen + 7) / 8;
792
793 trunc:
794 return -2;
795 }
796
797 static int
798 decode_labeled_vpn_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
799 {
800 u_int8_t addr[19];
801 u_int plen;
802
803 TCHECK(pptr[0]);
804 plen = pptr[0]; /* get prefix length */
805
806 if ((24+64) > plen)
807 return -1;
808
809 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
810
811 if (152 < plen)
812 return -1;
813
814 memset(&addr, 0, sizeof(addr));
815 TCHECK2(pptr[12], (plen + 7) / 8);
816 memcpy(&addr, &pptr[12], (plen + 7) / 8);
817 if (plen % 8) {
818 addr[(plen + 7) / 8 - 1] &=
819 ((0xff00 >> (plen % 8)) & 0xff);
820 }
821 /* the label may get offsetted by 4 bits so lets shift it right */
822 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
823 bgp_vpn_rd_print(pptr+4),
824 isonsap_string(addr,(plen + 7) / 8),
825 plen,
826 EXTRACT_24BITS(pptr+1)>>4,
827 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
828
829 return 12 + (plen + 7) / 8;
830
831 trunc:
832 return -2;
833 }
834
835 static int
836 bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len)
837 {
838 int i;
839 u_int16_t af;
840 u_int8_t safi, snpa, nhlen;
841 union { /* copy buffer for bandwidth values */
842 float f;
843 u_int32_t i;
844 } bw;
845 int advance;
846 int tlen;
847 const u_char *tptr;
848 char buf[MAXHOSTNAMELEN + 100];
849 char tokbuf[TOKBUFSIZE];
850
851 tptr = pptr;
852 tlen=len;
853
854 switch (attr->bgpa_type) {
855 case BGPTYPE_ORIGIN:
856 if (len != 1)
857 printf("invalid len");
858 else {
859 TCHECK(*tptr);
860 printf("%s", tok2strbuf(bgp_origin_values,
861 "Unknown Origin Typecode",
862 tptr[0],
863 tokbuf, sizeof(tokbuf)));
864 }
865 break;
866
867 case BGPTYPE_AS_PATH:
868 if (len % 2) {
869 printf("invalid len");
870 break;
871 }
872 if (!len) {
873 printf("empty");
874 break;
875 }
876
877 while (tptr < pptr + len) {
878 TCHECK(tptr[0]);
879 printf("%s", tok2strbuf(bgp_as_path_segment_open_values,
880 "?", tptr[0],
881 tokbuf, sizeof(tokbuf)));
882 for (i = 0; i < tptr[1] * 2; i += 2) {
883 TCHECK2(tptr[2 + i], 2);
884 printf("%u ", EXTRACT_16BITS(&tptr[2 + i]));
885 }
886 TCHECK(tptr[0]);
887 printf("%s", tok2strbuf(bgp_as_path_segment_close_values,
888 "?", tptr[0],
889 tokbuf, sizeof(tokbuf)));
890 TCHECK(tptr[1]);
891 tptr += 2 + tptr[1] * 2;
892 }
893 break;
894 case BGPTYPE_NEXT_HOP:
895 if (len != 4)
896 printf("invalid len");
897 else {
898 TCHECK2(tptr[0], 4);
899 printf("%s", getname(tptr));
900 }
901 break;
902 case BGPTYPE_MULTI_EXIT_DISC:
903 case BGPTYPE_LOCAL_PREF:
904 if (len != 4)
905 printf("invalid len");
906 else {
907 TCHECK2(tptr[0], 4);
908 printf("%u", EXTRACT_32BITS(tptr));
909 }
910 break;
911 case BGPTYPE_ATOMIC_AGGREGATE:
912 if (len != 0)
913 printf("invalid len");
914 break;
915 case BGPTYPE_AGGREGATOR:
916 if (len != 6) {
917 printf("invalid len");
918 break;
919 }
920 TCHECK2(tptr[0], 6);
921 printf(" AS #%u, origin %s", EXTRACT_16BITS(tptr),
922 getname(tptr + 2));
923 break;
924 case BGPTYPE_COMMUNITIES:
925 if (len % 4) {
926 printf("invalid len");
927 break;
928 }
929 while (tlen>0) {
930 u_int32_t comm;
931 TCHECK2(tptr[0], 4);
932 comm = EXTRACT_32BITS(tptr);
933 switch (comm) {
934 case BGP_COMMUNITY_NO_EXPORT:
935 printf(" NO_EXPORT");
936 break;
937 case BGP_COMMUNITY_NO_ADVERT:
938 printf(" NO_ADVERTISE");
939 break;
940 case BGP_COMMUNITY_NO_EXPORT_SUBCONFED:
941 printf(" NO_EXPORT_SUBCONFED");
942 break;
943 default:
944 printf("%u:%u%s",
945 (comm >> 16) & 0xffff,
946 comm & 0xffff,
947 (tlen>4) ? ", " : "");
948 break;
949 }
950 tlen -=4;
951 tptr +=4;
952 }
953 break;
954 case BGPTYPE_ORIGINATOR_ID:
955 if (len != 4) {
956 printf("invalid len");
957 break;
958 }
959 TCHECK2(tptr[0], 4);
960 printf("%s",getname(tptr));
961 break;
962 case BGPTYPE_CLUSTER_LIST:
963 if (len % 4) {
964 printf("invalid len");
965 break;
966 }
967 while (tlen>0) {
968 TCHECK2(tptr[0], 4);
969 printf("%s%s",
970 getname(tptr),
971 (tlen>4) ? ", " : "");
972 tlen -=4;
973 tptr +=4;
974 }
975 break;
976 case BGPTYPE_MP_REACH_NLRI:
977 TCHECK2(tptr[0], 3);
978 af = EXTRACT_16BITS(tptr);
979 safi = tptr[2];
980
981 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
982 tok2strbuf(af_values, "Unknown AFI", af,
983 tokbuf, sizeof(tokbuf)),
984 af,
985 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
986 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
987 tokbuf, sizeof(tokbuf)),
988 safi);
989
990 switch(af<<8 | safi) {
991 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
992 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
993 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
994 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
995 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
996 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
997 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
998 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
999 #ifdef INET6
1000 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1001 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1002 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1003 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1004 case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1005 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1006 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1007 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1008 #endif
1009 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1010 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1011 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1012 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1013 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1014 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1015 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1016 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1017 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1018 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1019 break;
1020 default:
1021 TCHECK2(tptr[0], tlen);
1022 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1023 if (vflag <= 1)
1024 print_unknown_data(tptr,"\n\t ",tlen);
1025 goto done;
1026 break;
1027 }
1028
1029 tptr +=3;
1030
1031 TCHECK(tptr[0]);
1032 nhlen = tptr[0];
1033 tlen = nhlen;
1034 tptr++;
1035
1036 if (tlen) {
1037 printf("\n\t nexthop: ");
1038 while (tlen > 0) {
1039 switch(af<<8 | safi) {
1040 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1041 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1042 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1043 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1044 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1045 if (tlen < (int)sizeof(struct in_addr)) {
1046 printf("invalid len");
1047 tlen = 0;
1048 } else {
1049 TCHECK2(tptr[0], sizeof(struct in_addr));
1050 printf("%s",getname(tptr));
1051 tlen -= sizeof(struct in_addr);
1052 tptr += sizeof(struct in_addr);
1053 }
1054 break;
1055 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1056 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1057 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1058 if (tlen < (int)(sizeof(struct in_addr)+BGP_VPN_RD_LEN)) {
1059 printf("invalid len");
1060 tlen = 0;
1061 } else {
1062 TCHECK2(tptr[0], sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1063 printf("RD: %s, %s",
1064 bgp_vpn_rd_print(tptr),
1065 getname(tptr+BGP_VPN_RD_LEN));
1066 tlen -= (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1067 tptr += (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1068 }
1069 break;
1070 #ifdef INET6
1071 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1072 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1073 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1074 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1075 case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1076 if (tlen < (int)sizeof(struct in6_addr)) {
1077 printf("invalid len");
1078 tlen = 0;
1079 } else {
1080 TCHECK2(tptr[0], sizeof(struct in6_addr));
1081 printf("%s", getname6(tptr));
1082 tlen -= sizeof(struct in6_addr);
1083 tptr += sizeof(struct in6_addr);
1084 }
1085 break;
1086 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1087 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1088 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1089 if (tlen < (int)(sizeof(struct in6_addr)+BGP_VPN_RD_LEN)) {
1090 printf("invalid len");
1091 tlen = 0;
1092 } else {
1093 TCHECK2(tptr[0], sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1094 printf("RD: %s, %s",
1095 bgp_vpn_rd_print(tptr),
1096 getname6(tptr+BGP_VPN_RD_LEN));
1097 tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1098 tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1099 }
1100 break;
1101 #endif
1102 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1103 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1104 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1105 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1106 if (tlen < (int)sizeof(struct in_addr)) {
1107 printf("invalid len");
1108 tlen = 0;
1109 } else {
1110 TCHECK2(tptr[0], sizeof(struct in_addr));
1111 printf("%s", getname(tptr));
1112 tlen -= (sizeof(struct in_addr));
1113 tptr += (sizeof(struct in_addr));
1114 }
1115 break;
1116 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1117 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1118 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1119 TCHECK2(tptr[0], tlen);
1120 printf("%s",isonsap_string(tptr,tlen));
1121 tptr += tlen;
1122 tlen = 0;
1123 break;
1124
1125 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1126 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1127 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1128 if (tlen < BGP_VPN_RD_LEN+1) {
1129 printf("invalid len");
1130 tlen = 0;
1131 } else {
1132 TCHECK2(tptr[0], tlen);
1133 printf("RD: %s, %s",
1134 bgp_vpn_rd_print(tptr),
1135 isonsap_string(tptr+BGP_VPN_RD_LEN,tlen-BGP_VPN_RD_LEN));
1136 /* rfc986 mapped IPv4 address ? */
1137 if (EXTRACT_32BITS(tptr+BGP_VPN_RD_LEN) == 0x47000601)
1138 printf(" = %s", getname(tptr+BGP_VPN_RD_LEN+4));
1139 #ifdef INET6
1140 /* rfc1888 mapped IPv6 address ? */
1141 else if (EXTRACT_24BITS(tptr+BGP_VPN_RD_LEN) == 0x350000)
1142 printf(" = %s", getname6(tptr+BGP_VPN_RD_LEN+3));
1143 #endif
1144 tptr += tlen;
1145 tlen = 0;
1146 }
1147 break;
1148 default:
1149 TCHECK2(tptr[0], tlen);
1150 printf("no AFI %u/SAFI %u decoder",af,safi);
1151 if (vflag <= 1)
1152 print_unknown_data(tptr,"\n\t ",tlen);
1153 tptr += tlen;
1154 tlen = 0;
1155 goto done;
1156 break;
1157 }
1158 }
1159 }
1160 printf(", nh-length: %u", nhlen);
1161 tptr += tlen;
1162
1163 TCHECK(tptr[0]);
1164 snpa = tptr[0];
1165 tptr++;
1166
1167 if (snpa) {
1168 printf("\n\t %u SNPA", snpa);
1169 for (/*nothing*/; snpa > 0; snpa--) {
1170 TCHECK(tptr[0]);
1171 printf("\n\t %d bytes", tptr[0]);
1172 tptr += tptr[0] + 1;
1173 }
1174 } else {
1175 printf(", no SNPA");
1176 }
1177
1178 while (len - (tptr - pptr) > 0) {
1179 switch (af<<8 | safi) {
1180 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1181 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1182 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1183 advance = decode_prefix4(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 (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1192 advance = decode_labeled_prefix4(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 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1201 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1202 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1203 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1204 if (advance == -1)
1205 printf("\n\t (illegal prefix length)");
1206 else if (advance == -2)
1207 goto trunc;
1208 else
1209 printf("\n\t %s", buf);
1210 break;
1211 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1212 advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1213 if (advance == -1)
1214 printf("\n\t (illegal prefix length)");
1215 else if (advance == -2)
1216 goto trunc;
1217 else
1218 printf("\n\t %s", buf);
1219 break;
1220 #ifdef INET6
1221 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1222 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1223 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1224 advance = decode_prefix6(tptr, buf, sizeof(buf));
1225 if (advance == -1)
1226 printf("\n\t (illegal prefix length)");
1227 else if (advance == -2)
1228 goto trunc;
1229 else
1230 printf("\n\t %s", buf);
1231 break;
1232 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1233 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1234 if (advance == -1)
1235 printf("\n\t (illegal prefix length)");
1236 else if (advance == -2)
1237 goto trunc;
1238 else
1239 printf("\n\t %s", buf);
1240 break;
1241 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1242 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1243 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1244 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1245 if (advance == -1)
1246 printf("\n\t (illegal prefix length)");
1247 else if (advance == -2)
1248 goto trunc;
1249 else
1250 printf("\n\t %s", buf);
1251 break;
1252 case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1253 advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1254 if (advance == -1)
1255 printf("\n\t (illegal prefix length)");
1256 else if (advance == -2)
1257 goto trunc;
1258 else
1259 printf("\n\t %s", buf);
1260 break;
1261 #endif
1262 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1263 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1264 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1265 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1266 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1267 if (advance == -1)
1268 printf("\n\t (illegal length)");
1269 else if (advance == -2)
1270 goto trunc;
1271 else
1272 printf("\n\t %s", buf);
1273 break;
1274 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1275 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1276 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1277 advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1278 if (advance == -1)
1279 printf("\n\t (illegal prefix length)");
1280 else if (advance == -2)
1281 goto trunc;
1282 else
1283 printf("\n\t %s", buf);
1284 break;
1285 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1286 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1287 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1288 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1289 if (advance == -1)
1290 printf("\n\t (illegal prefix length)");
1291 else if (advance == -2)
1292 goto trunc;
1293 else
1294 printf("\n\t %s", buf);
1295 break;
1296 default:
1297 TCHECK2(*tptr,tlen);
1298 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1299 if (vflag <= 1)
1300 print_unknown_data(tptr,"\n\t ",tlen);
1301 advance = 0;
1302 tptr = pptr + len;
1303 break;
1304 }
1305 if (advance < 0)
1306 break;
1307 tptr += advance;
1308 }
1309 done:
1310 break;
1311
1312 case BGPTYPE_MP_UNREACH_NLRI:
1313 TCHECK2(tptr[0], BGP_MP_NLRI_MINSIZE);
1314 af = EXTRACT_16BITS(tptr);
1315 safi = tptr[2];
1316
1317 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1318 tok2strbuf(af_values, "Unknown AFI", af,
1319 tokbuf, sizeof(tokbuf)),
1320 af,
1321 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1322 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1323 tokbuf, sizeof(tokbuf)),
1324 safi);
1325
1326 if (len == BGP_MP_NLRI_MINSIZE)
1327 printf("\n\t End-of-Rib Marker (empty NLRI)");
1328
1329 tptr += 3;
1330
1331 while (len - (tptr - pptr) > 0) {
1332 switch (af<<8 | safi) {
1333 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1334 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1335 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1336 advance = decode_prefix4(tptr, buf, sizeof(buf));
1337 if (advance == -1)
1338 printf("\n\t (illegal prefix length)");
1339 else if (advance == -2)
1340 goto trunc;
1341 else
1342 printf("\n\t %s", buf);
1343 break;
1344 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1345 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1346 if (advance == -1)
1347 printf("\n\t (illegal prefix length)");
1348 else if (advance == -2)
1349 goto trunc;
1350 else
1351 printf("\n\t %s", buf);
1352 break;
1353 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1354 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1355 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1356 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1357 if (advance == -1)
1358 printf("\n\t (illegal prefix length)");
1359 else if (advance == -2)
1360 goto trunc;
1361 else
1362 printf("\n\t %s", buf);
1363 break;
1364 #ifdef INET6
1365 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1366 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1367 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1368 advance = decode_prefix6(tptr, buf, sizeof(buf));
1369 if (advance == -1)
1370 printf("\n\t (illegal prefix length)");
1371 else if (advance == -2)
1372 goto trunc;
1373 else
1374 printf("\n\t %s", buf);
1375 break;
1376 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1377 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1378 if (advance == -1)
1379 printf("\n\t (illegal prefix length)");
1380 else if (advance == -2)
1381 goto trunc;
1382 else
1383 printf("\n\t %s", buf);
1384 break;
1385 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1386 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1387 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1388 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1389 if (advance == -1)
1390 printf("\n\t (illegal prefix length)");
1391 else if (advance == -2)
1392 goto trunc;
1393 else
1394 printf("\n\t %s", buf);
1395 break;
1396 #endif
1397 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1398 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1399 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1400 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1401 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1402 if (advance == -1)
1403 printf("\n\t (illegal length)");
1404 else if (advance == -2)
1405 goto trunc;
1406 else
1407 printf("\n\t %s", buf);
1408 break;
1409 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1410 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1411 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1412 advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1413 if (advance == -1)
1414 printf("\n\t (illegal prefix length)");
1415 else if (advance == -2)
1416 goto trunc;
1417 else
1418 printf("\n\t %s", buf);
1419 break;
1420 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1421 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1422 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1423 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1424 if (advance == -1)
1425 printf("\n\t (illegal prefix length)");
1426 else if (advance == -2)
1427 goto trunc;
1428 else
1429 printf("\n\t %s", buf);
1430 break;
1431 default:
1432 TCHECK2(*(tptr-3),tlen);
1433 printf("no AFI %u / SAFI %u decoder",af,safi);
1434 if (vflag <= 1)
1435 print_unknown_data(tptr-3,"\n\t ",tlen);
1436 advance = 0;
1437 tptr = pptr + len;
1438 break;
1439 }
1440 if (advance < 0)
1441 break;
1442 tptr += advance;
1443 }
1444 break;
1445 case BGPTYPE_EXTD_COMMUNITIES:
1446 if (len % 8) {
1447 printf("invalid len");
1448 break;
1449 }
1450 while (tlen>0) {
1451 u_int16_t extd_comm;
1452
1453 TCHECK2(tptr[0], 2);
1454 extd_comm=EXTRACT_16BITS(tptr);
1455
1456 printf("\n\t %s (0x%04x), Flags [%s]",
1457 tok2strbuf(bgp_extd_comm_subtype_values,
1458 "unknown extd community typecode",
1459 extd_comm, tokbuf, sizeof(tokbuf)),
1460 extd_comm,
1461 bittok2str(bgp_extd_comm_flag_values, "none", extd_comm));
1462
1463 TCHECK2(*(tptr+2), 6);
1464 switch(extd_comm) {
1465 case BGP_EXT_COM_RT_0:
1466 case BGP_EXT_COM_RO_0:
1467 printf(": %u:%s",
1468 EXTRACT_16BITS(tptr+2),
1469 getname(tptr+4));
1470 break;
1471 case BGP_EXT_COM_RT_1:
1472 case BGP_EXT_COM_RO_1:
1473 printf(": %s:%u",
1474 getname(tptr+2),
1475 EXTRACT_16BITS(tptr+6));
1476 break;
1477 case BGP_EXT_COM_RT_2:
1478 case BGP_EXT_COM_RO_2:
1479 printf(": %u:%u",
1480 EXTRACT_32BITS(tptr+2),
1481 EXTRACT_16BITS(tptr+6));
1482 break;
1483 case BGP_EXT_COM_LINKBAND:
1484 bw.i = EXTRACT_32BITS(tptr+2);
1485 printf(": bandwidth: %.3f Mbps",
1486 bw.f*8/1000000);
1487 break;
1488 case BGP_EXT_COM_CISCO_MCAST:
1489 printf(": AS %u, group %s",
1490 EXTRACT_16BITS(tptr+2),
1491 getname(tptr+4));
1492 break;
1493 case BGP_EXT_COM_VPN_ORIGIN:
1494 case BGP_EXT_COM_VPN_ORIGIN2:
1495 case BGP_EXT_COM_VPN_ORIGIN3:
1496 case BGP_EXT_COM_VPN_ORIGIN4:
1497 case BGP_EXT_COM_OSPF_RID:
1498 case BGP_EXT_COM_OSPF_RID2:
1499 printf("%s", getname(tptr+2));
1500 break;
1501 case BGP_EXT_COM_OSPF_RTYPE:
1502 case BGP_EXT_COM_OSPF_RTYPE2:
1503 printf(": area:%s, router-type:%s, metric-type:%s%s",
1504 getname(tptr+2),
1505 tok2strbuf(bgp_extd_comm_ospf_rtype_values,
1506 "unknown (0x%02x)",
1507 *(tptr+6),
1508 tokbuf, sizeof(tokbuf)),
1509 (*(tptr+7) & BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "",
1510 (*(tptr+6) == (BGP_OSPF_RTYPE_EXT ||BGP_OSPF_RTYPE_NSSA )) ? "E1" : "");
1511 break;
1512 case BGP_EXT_COM_L2INFO:
1513 printf(": %s Control Flags [0x%02x]:MTU %u",
1514 tok2strbuf(l2vpn_encaps_values,
1515 "unknown encaps",
1516 *(tptr+2),
1517 tokbuf, sizeof(tokbuf)),
1518 *(tptr+3),
1519 EXTRACT_16BITS(tptr+4));
1520 break;
1521 default:
1522 TCHECK2(*tptr,8);
1523 print_unknown_data(tptr,"\n\t ",8);
1524 break;
1525 }
1526 tlen -=8;
1527 tptr +=8;
1528 }
1529 break;
1530
1531 case BGPTYPE_ATTR_SET:
1532 TCHECK2(tptr[0], 4);
1533 printf("\n\t Origin AS: %u", EXTRACT_32BITS(tptr));
1534 tptr+=4;
1535 len -=4;
1536
1537 while (len >= 2 ) {
1538 int alen;
1539 struct bgp_attr bgpa;
1540
1541 TCHECK2(tptr[0], sizeof(bgpa));
1542 memcpy(&bgpa, tptr, sizeof(bgpa));
1543 alen = bgp_attr_len(&bgpa);
1544 tptr += bgp_attr_off(&bgpa);
1545 len -= bgp_attr_off(&bgpa);
1546
1547 printf("\n\t %s (%u), length: %u",
1548 tok2strbuf(bgp_attr_values,
1549 "Unknown Attribute", bgpa.bgpa_type,
1550 tokbuf, sizeof(tokbuf)),
1551 bgpa.bgpa_type,
1552 alen);
1553
1554 if (bgpa.bgpa_flags) {
1555 printf(", Flags [%s%s%s%s",
1556 bgpa.bgpa_flags & 0x80 ? "O" : "",
1557 bgpa.bgpa_flags & 0x40 ? "T" : "",
1558 bgpa.bgpa_flags & 0x20 ? "P" : "",
1559 bgpa.bgpa_flags & 0x10 ? "E" : "");
1560 if (bgpa.bgpa_flags & 0xf)
1561 printf("+%x", bgpa.bgpa_flags & 0xf);
1562 printf("]: ");
1563 }
1564 /* FIXME check for recursion */
1565 if (!bgp_attr_print(&bgpa, tptr, alen))
1566 return 0;
1567 tptr += alen;
1568 len -= alen;
1569 }
1570 break;
1571
1572
1573 default:
1574 TCHECK2(*pptr,len);
1575 printf("\n\t no Attribute %u decoder",attr->bgpa_type); /* we have no decoder for the attribute */
1576 if (vflag <= 1)
1577 print_unknown_data(pptr,"\n\t ",len);
1578 break;
1579 }
1580 if (vflag > 1 && len) { /* omit zero length attributes*/
1581 TCHECK2(*pptr,len);
1582 print_unknown_data(pptr,"\n\t ",len);
1583 }
1584 return 1;
1585
1586 trunc:
1587 return 0;
1588 }
1589
1590 static void
1591 bgp_open_print(const u_char *dat, int length)
1592 {
1593 struct bgp_open bgpo;
1594 struct bgp_opt bgpopt;
1595 const u_char *opt;
1596 int i,cap_type,cap_len,tcap_len,cap_offset;
1597 char tokbuf[TOKBUFSIZE];
1598 char tokbuf2[TOKBUFSIZE];
1599
1600 TCHECK2(dat[0], BGP_OPEN_SIZE);
1601 memcpy(&bgpo, dat, BGP_OPEN_SIZE);
1602
1603 printf("\n\t Version %d, ", bgpo.bgpo_version);
1604 printf("my AS %u, ", ntohs(bgpo.bgpo_myas));
1605 printf("Holdtime %us, ", ntohs(bgpo.bgpo_holdtime));
1606 printf("ID %s", getname((u_char *)&bgpo.bgpo_id));
1607 printf("\n\t Optional parameters, length: %u", bgpo.bgpo_optlen);
1608
1609 /* some little sanity checking */
1610 if (length < bgpo.bgpo_optlen+BGP_OPEN_SIZE)
1611 return;
1612
1613 /* ugly! */
1614 opt = &((const struct bgp_open *)dat)->bgpo_optlen;
1615 opt++;
1616
1617 i = 0;
1618 while (i < bgpo.bgpo_optlen) {
1619 TCHECK2(opt[i], BGP_OPT_SIZE);
1620 memcpy(&bgpopt, &opt[i], BGP_OPT_SIZE);
1621 if (i + 2 + bgpopt.bgpopt_len > bgpo.bgpo_optlen) {
1622 printf("\n\t Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len);
1623 break;
1624 }
1625
1626 printf("\n\t Option %s (%u), length: %u",
1627 tok2strbuf(bgp_opt_values,"Unknown",
1628 bgpopt.bgpopt_type,
1629 tokbuf, sizeof(tokbuf)),
1630 bgpopt.bgpopt_type,
1631 bgpopt.bgpopt_len);
1632
1633 /* now lets decode the options we know*/
1634 switch(bgpopt.bgpopt_type) {
1635 case BGP_OPT_CAP:
1636 cap_type=opt[i+BGP_OPT_SIZE];
1637 cap_len=opt[i+BGP_OPT_SIZE+1];
1638 tcap_len=cap_len;
1639 printf("\n\t %s (%u), length: %u",
1640 tok2strbuf(bgp_capcode_values, "Unknown",
1641 cap_type, tokbuf, sizeof(tokbuf)),
1642 cap_type,
1643 cap_len);
1644 switch(cap_type) {
1645 case BGP_CAPCODE_MP:
1646 printf("\n\t\tAFI %s (%u), SAFI %s (%u)",
1647 tok2strbuf(af_values, "Unknown",
1648 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1649 tokbuf, sizeof(tokbuf)),
1650 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1651 tok2strbuf(bgp_safi_values, "Unknown",
1652 opt[i+BGP_OPT_SIZE+5],
1653 tokbuf, sizeof(tokbuf)),
1654 opt[i+BGP_OPT_SIZE+5]);
1655 break;
1656 case BGP_CAPCODE_RESTART:
1657 printf("\n\t\tRestart Flags: [%s], Restart Time %us",
1658 ((opt[i+BGP_OPT_SIZE+2])&0x80) ? "R" : "none",
1659 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2)&0xfff);
1660 tcap_len-=2;
1661 cap_offset=4;
1662 while(tcap_len>=4) {
1663 printf("\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s",
1664 tok2strbuf(af_values,"Unknown",
1665 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1666 tokbuf, sizeof(tokbuf)),
1667 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1668 tok2strbuf(bgp_safi_values,"Unknown",
1669 opt[i+BGP_OPT_SIZE+cap_offset+2],
1670 tokbuf2, sizeof(tokbuf2)),
1671 opt[i+BGP_OPT_SIZE+cap_offset+2],
1672 ((opt[i+BGP_OPT_SIZE+cap_offset+3])&0x80) ? "yes" : "no" );
1673 tcap_len-=4;
1674 cap_offset+=4;
1675 }
1676 break;
1677 case BGP_CAPCODE_RR:
1678 case BGP_CAPCODE_RR_CISCO:
1679 break;
1680 default:
1681 TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
1682 printf("\n\t\tno decoder for Capability %u",
1683 cap_type);
1684 if (vflag <= 1)
1685 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
1686 break;
1687 }
1688 if (vflag > 1) {
1689 TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
1690 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
1691 }
1692 break;
1693 case BGP_OPT_AUTH:
1694 default:
1695 printf("\n\t no decoder for option %u",
1696 bgpopt.bgpopt_type);
1697 break;
1698 }
1699
1700 i += BGP_OPT_SIZE + bgpopt.bgpopt_len;
1701 }
1702 return;
1703 trunc:
1704 printf("[|BGP]");
1705 }
1706
1707 static void
1708 bgp_update_print(const u_char *dat, int length)
1709 {
1710 struct bgp bgp;
1711 struct bgp_attr bgpa;
1712 const u_char *p;
1713 int len;
1714 int i;
1715 char tokbuf[TOKBUFSIZE];
1716
1717 TCHECK2(dat[0], BGP_SIZE);
1718 memcpy(&bgp, dat, BGP_SIZE);
1719 p = dat + BGP_SIZE; /*XXX*/
1720
1721 /* Unfeasible routes */
1722 len = EXTRACT_16BITS(p);
1723 if (len) {
1724 /*
1725 * Without keeping state from the original NLRI message,
1726 * it's not possible to tell if this a v4 or v6 route,
1727 * so only try to decode it if we're not v6 enabled.
1728 */
1729 #ifdef INET6
1730 printf("\n\t Withdrawn routes: %d bytes", len);
1731 #else
1732 char buf[MAXHOSTNAMELEN + 100];
1733 int wpfx;
1734
1735 TCHECK2(p[2], len);
1736 i = 2;
1737
1738 printf("\n\t Withdrawn routes:");
1739
1740 while(i < 2 + len) {
1741 wpfx = decode_prefix4(&p[i], buf, sizeof(buf));
1742 if (wpfx == -1) {
1743 printf("\n\t (illegal prefix length)");
1744 break;
1745 } else if (wpfx == -2)
1746 goto trunc;
1747 else {
1748 i += wpfx;
1749 printf("\n\t %s", buf);
1750 }
1751 }
1752 #endif
1753 }
1754 p += 2 + len;
1755
1756 TCHECK2(p[0], 2);
1757 len = EXTRACT_16BITS(p);
1758
1759 if (len == 0 && length == BGP_UPDATE_MINSIZE) {
1760 printf("\n\t End-of-Rib Marker (empty NLRI)");
1761 return;
1762 }
1763
1764 if (len) {
1765 /* do something more useful!*/
1766 i = 2;
1767 while (i < 2 + len) {
1768 int alen, aoff;
1769
1770 TCHECK2(p[i], sizeof(bgpa));
1771 memcpy(&bgpa, &p[i], sizeof(bgpa));
1772 alen = bgp_attr_len(&bgpa);
1773 aoff = bgp_attr_off(&bgpa);
1774
1775 printf("\n\t %s (%u), length: %u",
1776 tok2strbuf(bgp_attr_values, "Unknown Attribute",
1777 bgpa.bgpa_type,
1778 tokbuf, sizeof(tokbuf)),
1779 bgpa.bgpa_type,
1780 alen);
1781
1782 if (bgpa.bgpa_flags) {
1783 printf(", Flags [%s%s%s%s",
1784 bgpa.bgpa_flags & 0x80 ? "O" : "",
1785 bgpa.bgpa_flags & 0x40 ? "T" : "",
1786 bgpa.bgpa_flags & 0x20 ? "P" : "",
1787 bgpa.bgpa_flags & 0x10 ? "E" : "");
1788 if (bgpa.bgpa_flags & 0xf)
1789 printf("+%x", bgpa.bgpa_flags & 0xf);
1790 printf("]: ");
1791 }
1792 if (!bgp_attr_print(&bgpa, &p[i + aoff], alen))
1793 goto trunc;
1794 i += aoff + alen;
1795 }
1796 }
1797 p += 2 + len;
1798
1799 if (dat + length > p) {
1800 printf("\n\t Updated routes:");
1801 while (dat + length > p) {
1802 char buf[MAXHOSTNAMELEN + 100];
1803 i = decode_prefix4(p, buf, sizeof(buf));
1804 if (i == -1) {
1805 printf("\n\t (illegal prefix length)");
1806 break;
1807 } else if (i == -2)
1808 goto trunc;
1809 else {
1810 printf("\n\t %s", buf);
1811 p += i;
1812 }
1813 }
1814 }
1815 return;
1816 trunc:
1817 printf("[|BGP]");
1818 }
1819
1820 static void
1821 bgp_notification_print(const u_char *dat, int length)
1822 {
1823 struct bgp_notification bgpn;
1824 const u_char *tptr;
1825 char tokbuf[TOKBUFSIZE];
1826 char tokbuf2[TOKBUFSIZE];
1827
1828 TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
1829 memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
1830
1831 /* some little sanity checking */
1832 if (length<BGP_NOTIFICATION_SIZE)
1833 return;
1834
1835 printf(", %s (%u)",
1836 tok2strbuf(bgp_notify_major_values, "Unknown Error",
1837 bgpn.bgpn_major, tokbuf, sizeof(tokbuf)),
1838 bgpn.bgpn_major);
1839
1840 switch (bgpn.bgpn_major) {
1841
1842 case BGP_NOTIFY_MAJOR_MSG:
1843 printf(", subcode %s (%u)",
1844 tok2strbuf(bgp_notify_minor_msg_values, "Unknown",
1845 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1846 bgpn.bgpn_minor);
1847 break;
1848 case BGP_NOTIFY_MAJOR_OPEN:
1849 printf(", subcode %s (%u)",
1850 tok2strbuf(bgp_notify_minor_open_values, "Unknown",
1851 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1852 bgpn.bgpn_minor);
1853 break;
1854 case BGP_NOTIFY_MAJOR_UPDATE:
1855 printf(", subcode %s (%u)",
1856 tok2strbuf(bgp_notify_minor_update_values, "Unknown",
1857 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1858 bgpn.bgpn_minor);
1859 break;
1860 case BGP_NOTIFY_MAJOR_CAP:
1861 printf(" subcode %s (%u)",
1862 tok2strbuf(bgp_notify_minor_cap_values, "Unknown",
1863 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1864 bgpn.bgpn_minor);
1865 case BGP_NOTIFY_MAJOR_CEASE:
1866 printf(", subcode %s (%u)",
1867 tok2strbuf(bgp_notify_minor_cease_values, "Unknown",
1868 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1869 bgpn.bgpn_minor);
1870
1871 /* draft-ietf-idr-cease-subcode-02 mentions optionally 7 bytes
1872 * for the maxprefix subtype, which may contain AFI, SAFI and MAXPREFIXES
1873 */
1874 if(bgpn.bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= BGP_NOTIFICATION_SIZE + 7) {
1875 tptr = dat + BGP_NOTIFICATION_SIZE;
1876 TCHECK2(*tptr, 7);
1877 printf(", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
1878 tok2strbuf(af_values, "Unknown",
1879 EXTRACT_16BITS(tptr), tokbuf, sizeof(tokbuf)),
1880 EXTRACT_16BITS(tptr),
1881 tok2strbuf(bgp_safi_values, "Unknown", *(tptr+2),
1882 tokbuf2, sizeof(tokbuf)),
1883 *(tptr+2),
1884 EXTRACT_32BITS(tptr+3));
1885 }
1886 break;
1887 default:
1888 break;
1889 }
1890
1891 return;
1892 trunc:
1893 printf("[|BGP]");
1894 }
1895
1896 static void
1897 bgp_route_refresh_print(const u_char *pptr, int len) {
1898
1899 const struct bgp_route_refresh *bgp_route_refresh_header;
1900 char tokbuf[TOKBUFSIZE];
1901 char tokbuf2[TOKBUFSIZE];
1902
1903 TCHECK2(pptr[0], BGP_ROUTE_REFRESH_SIZE);
1904
1905 /* some little sanity checking */
1906 if (len<BGP_ROUTE_REFRESH_SIZE)
1907 return;
1908
1909 bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
1910
1911 printf("\n\t AFI %s (%u), SAFI %s (%u)",
1912 tok2strbuf(af_values,"Unknown",
1913 /* this stinks but the compiler pads the structure
1914 * weird */
1915 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
1916 tokbuf, sizeof(tokbuf)),
1917 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
1918 tok2strbuf(bgp_safi_values,"Unknown",
1919 bgp_route_refresh_header->safi,
1920 tokbuf2, sizeof(tokbuf2)),
1921 bgp_route_refresh_header->safi);
1922
1923 if (vflag > 1) {
1924 TCHECK2(*pptr, len);
1925 print_unknown_data(pptr,"\n\t ", len);
1926 }
1927
1928 return;
1929 trunc:
1930 printf("[|BGP]");
1931 }
1932
1933 static int
1934 bgp_header_print(const u_char *dat, int length)
1935 {
1936 struct bgp bgp;
1937 char tokbuf[TOKBUFSIZE];
1938
1939 TCHECK2(dat[0], BGP_SIZE);
1940 memcpy(&bgp, dat, BGP_SIZE);
1941 printf("\n\t%s Message (%u), length: %u",
1942 tok2strbuf(bgp_msg_values, "Unknown", bgp.bgp_type,
1943 tokbuf, sizeof(tokbuf)),
1944 bgp.bgp_type,
1945 length);
1946
1947 switch (bgp.bgp_type) {
1948 case BGP_OPEN:
1949 bgp_open_print(dat, length);
1950 break;
1951 case BGP_UPDATE:
1952 bgp_update_print(dat, length);
1953 break;
1954 case BGP_NOTIFICATION:
1955 bgp_notification_print(dat, length);
1956 break;
1957 case BGP_KEEPALIVE:
1958 break;
1959 case BGP_ROUTE_REFRESH:
1960 bgp_route_refresh_print(dat, length);
1961 break;
1962 default:
1963 /* we have no decoder for the BGP message */
1964 TCHECK2(*dat, length);
1965 printf("\n\t no Message %u decoder",bgp.bgp_type);
1966 print_unknown_data(dat,"\n\t ",length);
1967 break;
1968 }
1969 return 1;
1970 trunc:
1971 printf("[|BGP]");
1972 return 0;
1973 }
1974
1975 void
1976 bgp_print(const u_char *dat, int length)
1977 {
1978 const u_char *p;
1979 const u_char *ep;
1980 const u_char *start;
1981 const u_char marker[] = {
1982 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1983 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1984 };
1985 struct bgp bgp;
1986 u_int16_t hlen;
1987 char tokbuf[TOKBUFSIZE];
1988
1989 ep = dat + length;
1990 if (snapend < dat + length)
1991 ep = snapend;
1992
1993 printf(": BGP, length: %u",length);
1994
1995 if (vflag < 1) /* lets be less chatty */
1996 return;
1997
1998 p = dat;
1999 start = p;
2000 while (p < ep) {
2001 if (!TTEST2(p[0], 1))
2002 break;
2003 if (p[0] != 0xff) {
2004 p++;
2005 continue;
2006 }
2007
2008 if (!TTEST2(p[0], sizeof(marker)))
2009 break;
2010 if (memcmp(p, marker, sizeof(marker)) != 0) {
2011 p++;
2012 continue;
2013 }
2014
2015 /* found BGP header */
2016 TCHECK2(p[0], BGP_SIZE); /*XXX*/
2017 memcpy(&bgp, p, BGP_SIZE);
2018
2019 if (start != p)
2020 printf(" [|BGP]");
2021
2022 hlen = ntohs(bgp.bgp_len);
2023 if (hlen < BGP_SIZE) {
2024 printf("\n[|BGP Bogus header length %u < %u]", hlen,
2025 BGP_SIZE);
2026 break;
2027 }
2028
2029 if (TTEST2(p[0], hlen)) {
2030 if (!bgp_header_print(p, hlen))
2031 return;
2032 p += hlen;
2033 start = p;
2034 } else {
2035 printf("\n[|BGP %s]",
2036 tok2strbuf(bgp_msg_values,
2037 "Unknown Message Type",
2038 bgp.bgp_type,
2039 tokbuf, sizeof(tokbuf)));
2040 break;
2041 }
2042 }
2043
2044 return;
2045
2046 trunc:
2047 printf(" [|BGP]");
2048 }
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