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add cisco prop. eigrp related, extd. communities
[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 1.99 2005-10-19 09:24:08 hannes Exp $";
40 #endif
41
42 #include <tcpdump-stdinc.h>
43
44 #include <stdio.h>
45 #include <string.h>
46
47 #include "interface.h"
48 #include "decode_prefix.h"
49 #include "addrtoname.h"
50 #include "extract.h"
51 #include "bgp.h"
52 #include "l2vpn.h"
53
54 struct bgp {
55 u_int8_t bgp_marker[16];
56 u_int16_t bgp_len;
57 u_int8_t bgp_type;
58 };
59 #define BGP_SIZE 19 /* unaligned */
60
61 #define BGP_OPEN 1
62 #define BGP_UPDATE 2
63 #define BGP_NOTIFICATION 3
64 #define BGP_KEEPALIVE 4
65 #define BGP_ROUTE_REFRESH 5
66
67 static struct tok bgp_msg_values[] = {
68 { BGP_OPEN, "Open"},
69 { BGP_UPDATE, "Update"},
70 { BGP_NOTIFICATION, "Notification"},
71 { BGP_KEEPALIVE, "Keepalive"},
72 { BGP_ROUTE_REFRESH, "Route Refresh"},
73 { 0, NULL}
74 };
75
76 struct bgp_open {
77 u_int8_t bgpo_marker[16];
78 u_int16_t bgpo_len;
79 u_int8_t bgpo_type;
80 u_int8_t bgpo_version;
81 u_int16_t bgpo_myas;
82 u_int16_t bgpo_holdtime;
83 u_int32_t bgpo_id;
84 u_int8_t bgpo_optlen;
85 /* options should follow */
86 };
87 #define BGP_OPEN_SIZE 29 /* unaligned */
88
89 struct bgp_opt {
90 u_int8_t bgpopt_type;
91 u_int8_t bgpopt_len;
92 /* variable length */
93 };
94 #define BGP_OPT_SIZE 2 /* some compilers may pad to 4 bytes */
95
96 #define BGP_UPDATE_MINSIZE 23
97
98 struct bgp_notification {
99 u_int8_t bgpn_marker[16];
100 u_int16_t bgpn_len;
101 u_int8_t bgpn_type;
102 u_int8_t bgpn_major;
103 u_int8_t bgpn_minor;
104 };
105 #define BGP_NOTIFICATION_SIZE 21 /* unaligned */
106
107 struct bgp_route_refresh {
108 u_int8_t bgp_marker[16];
109 u_int16_t len;
110 u_int8_t type;
111 u_int8_t afi[2]; /* the compiler messes this structure up */
112 u_int8_t res; /* when doing misaligned sequences of int8 and int16 */
113 u_int8_t safi; /* afi should be int16 - so we have to access it using */
114 }; /* EXTRACT_16BITS(&bgp_route_refresh->afi) (sigh) */
115 #define BGP_ROUTE_REFRESH_SIZE 23
116
117 struct bgp_attr {
118 u_int8_t bgpa_flags;
119 u_int8_t bgpa_type;
120 union {
121 u_int8_t len;
122 u_int16_t elen;
123 } bgpa_len;
124 #define bgp_attr_len(p) \
125 (((p)->bgpa_flags & 0x10) ? \
126 EXTRACT_16BITS(&(p)->bgpa_len.elen) : (p)->bgpa_len.len)
127 #define bgp_attr_off(p) \
128 (((p)->bgpa_flags & 0x10) ? 4 : 3)
129 };
130
131 #define BGPTYPE_ORIGIN 1
132 #define BGPTYPE_AS_PATH 2
133 #define BGPTYPE_NEXT_HOP 3
134 #define BGPTYPE_MULTI_EXIT_DISC 4
135 #define BGPTYPE_LOCAL_PREF 5
136 #define BGPTYPE_ATOMIC_AGGREGATE 6
137 #define BGPTYPE_AGGREGATOR 7
138 #define BGPTYPE_COMMUNITIES 8 /* RFC1997 */
139 #define BGPTYPE_ORIGINATOR_ID 9 /* RFC1998 */
140 #define BGPTYPE_CLUSTER_LIST 10 /* RFC1998 */
141 #define BGPTYPE_DPA 11 /* draft-ietf-idr-bgp-dpa */
142 #define BGPTYPE_ADVERTISERS 12 /* RFC1863 */
143 #define BGPTYPE_RCID_PATH 13 /* RFC1863 */
144 #define BGPTYPE_MP_REACH_NLRI 14 /* RFC2283 */
145 #define BGPTYPE_MP_UNREACH_NLRI 15 /* RFC2283 */
146 #define BGPTYPE_EXTD_COMMUNITIES 16 /* draft-ietf-idr-bgp-ext-communities */
147 #define BGPTYPE_ATTR_SET 128 /* draft-marques-ppvpn-ibgp */
148
149 #define BGP_MP_NLRI_MINSIZE 3 /* End of RIB Marker detection */
150
151 static struct tok bgp_attr_values[] = {
152 { BGPTYPE_ORIGIN, "Origin"},
153 { BGPTYPE_AS_PATH, "AS Path"},
154 { BGPTYPE_NEXT_HOP, "Next Hop"},
155 { BGPTYPE_MULTI_EXIT_DISC, "Multi Exit Discriminator"},
156 { BGPTYPE_LOCAL_PREF, "Local Preference"},
157 { BGPTYPE_ATOMIC_AGGREGATE, "Atomic Aggregate"},
158 { BGPTYPE_AGGREGATOR, "Aggregator"},
159 { BGPTYPE_COMMUNITIES, "Community"},
160 { BGPTYPE_ORIGINATOR_ID, "Originator ID"},
161 { BGPTYPE_CLUSTER_LIST, "Cluster List"},
162 { BGPTYPE_DPA, "DPA"},
163 { BGPTYPE_ADVERTISERS, "Advertisers"},
164 { BGPTYPE_RCID_PATH, "RCID Path / Cluster ID"},
165 { BGPTYPE_MP_REACH_NLRI, "Multi-Protocol Reach NLRI"},
166 { BGPTYPE_MP_UNREACH_NLRI, "Multi-Protocol Unreach NLRI"},
167 { BGPTYPE_EXTD_COMMUNITIES, "Extended Community"},
168 { BGPTYPE_ATTR_SET, "Attribute Set"},
169 { 255, "Reserved for development"},
170 { 0, NULL}
171 };
172
173 #define BGP_AS_SET 1
174 #define BGP_AS_SEQUENCE 2
175 #define BGP_CONFED_AS_SEQUENCE 3 /* draft-ietf-idr-rfc3065bis-01 */
176 #define BGP_CONFED_AS_SET 4 /* draft-ietf-idr-rfc3065bis-01 */
177
178 static struct tok bgp_as_path_segment_open_values[] = {
179 { BGP_AS_SEQUENCE, ""},
180 { BGP_AS_SET, "{ "},
181 { BGP_CONFED_AS_SEQUENCE, "( "},
182 { BGP_CONFED_AS_SET, "({ "},
183 { 0, NULL}
184 };
185
186 static struct tok bgp_as_path_segment_close_values[] = {
187 { BGP_AS_SEQUENCE, ""},
188 { BGP_AS_SET, "}"},
189 { BGP_CONFED_AS_SEQUENCE, ")"},
190 { BGP_CONFED_AS_SET, "})"},
191 { 0, NULL}
192 };
193
194 #define BGP_OPT_AUTH 1
195 #define BGP_OPT_CAP 2
196
197
198 static struct tok bgp_opt_values[] = {
199 { BGP_OPT_AUTH, "Authentication Information"},
200 { BGP_OPT_CAP, "Capabilities Advertisement"},
201 { 0, NULL}
202 };
203
204 #define BGP_CAPCODE_MP 1
205 #define BGP_CAPCODE_RR 2
206 #define BGP_CAPCODE_ORF 3 /* XXX */
207 #define BGP_CAPCODE_RESTART 64 /* draft-ietf-idr-restart-05 */
208 #define BGP_CAPCODE_AS_NEW 65 /* XXX */
209 #define BGP_CAPCODE_DYN_CAP 67 /* XXX */
210 #define BGP_CAPCODE_RR_CISCO 128
211
212 static struct tok bgp_capcode_values[] = {
213 { BGP_CAPCODE_MP, "Multiprotocol Extensions"},
214 { BGP_CAPCODE_RR, "Route Refresh"},
215 { BGP_CAPCODE_ORF, "Cooperative Route Filtering"},
216 { BGP_CAPCODE_RESTART, "Graceful Restart"},
217 { BGP_CAPCODE_AS_NEW, "32-Bit AS Number"},
218 { BGP_CAPCODE_DYN_CAP, "Dynamic Capability"},
219 { BGP_CAPCODE_RR_CISCO, "Route Refresh (Cisco)"},
220 { 0, NULL}
221 };
222
223 #define BGP_NOTIFY_MAJOR_MSG 1
224 #define BGP_NOTIFY_MAJOR_OPEN 2
225 #define BGP_NOTIFY_MAJOR_UPDATE 3
226 #define BGP_NOTIFY_MAJOR_HOLDTIME 4
227 #define BGP_NOTIFY_MAJOR_FSM 5
228 #define BGP_NOTIFY_MAJOR_CEASE 6
229 #define BGP_NOTIFY_MAJOR_CAP 7
230
231 static struct tok bgp_notify_major_values[] = {
232 { BGP_NOTIFY_MAJOR_MSG, "Message Header Error"},
233 { BGP_NOTIFY_MAJOR_OPEN, "OPEN Message Error"},
234 { BGP_NOTIFY_MAJOR_UPDATE, "UPDATE Message Error"},
235 { BGP_NOTIFY_MAJOR_HOLDTIME,"Hold Timer Expired"},
236 { BGP_NOTIFY_MAJOR_FSM, "Finite State Machine Error"},
237 { BGP_NOTIFY_MAJOR_CEASE, "Cease"},
238 { BGP_NOTIFY_MAJOR_CAP, "Capability Message Error"},
239 { 0, NULL}
240 };
241
242 /* draft-ietf-idr-cease-subcode-02 */
243 #define BGP_NOTIFY_MINOR_CEASE_MAXPRFX 1
244 static struct tok bgp_notify_minor_cease_values[] = {
245 { BGP_NOTIFY_MINOR_CEASE_MAXPRFX, "Maximum Number of Prefixes Reached"},
246 { 2, "Administratively Shutdown"},
247 { 3, "Peer Unconfigured"},
248 { 4, "Administratively Reset"},
249 { 5, "Connection Rejected"},
250 { 6, "Other Configuration Change"},
251 { 7, "Connection Collision Resolution"},
252 { 0, NULL}
253 };
254
255 static struct tok bgp_notify_minor_msg_values[] = {
256 { 1, "Connection Not Synchronized"},
257 { 2, "Bad Message Length"},
258 { 3, "Bad Message Type"},
259 { 0, NULL}
260 };
261
262 static struct tok bgp_notify_minor_open_values[] = {
263 { 1, "Unsupported Version Number"},
264 { 2, "Bad Peer AS"},
265 { 3, "Bad BGP Identifier"},
266 { 4, "Unsupported Optional Parameter"},
267 { 5, "Authentication Failure"},
268 { 6, "Unacceptable Hold Time"},
269 { 0, NULL}
270 };
271
272 static struct tok bgp_notify_minor_update_values[] = {
273 { 1, "Malformed Attribute List"},
274 { 2, "Unrecognized Well-known Attribute"},
275 { 3, "Missing Well-known Attribute"},
276 { 4, "Attribute Flags Error"},
277 { 5, "Attribute Length Error"},
278 { 6, "Invalid ORIGIN Attribute"},
279 { 7, "AS Routing Loop"},
280 { 8, "Invalid NEXT_HOP Attribute"},
281 { 9, "Optional Attribute Error"},
282 { 10, "Invalid Network Field"},
283 { 11, "Malformed AS_PATH"},
284 { 0, NULL}
285 };
286
287 static struct tok bgp_notify_minor_cap_values[] = {
288 { 1, "Invalid Action Value" },
289 { 2, "Invalid Capability Length" },
290 { 3, "Malformed Capability Value" },
291 { 4, "Unsupported Capability Code" },
292 { 0, NULL }
293 };
294
295 static struct tok bgp_origin_values[] = {
296 { 0, "IGP"},
297 { 1, "EGP"},
298 { 2, "Incomplete"},
299 { 0, NULL}
300 };
301
302 /* Subsequent address family identifier, RFC2283 section 7 */
303 #define SAFNUM_RES 0
304 #define SAFNUM_UNICAST 1
305 #define SAFNUM_MULTICAST 2
306 #define SAFNUM_UNIMULTICAST 3
307 /* labeled BGP RFC3107 */
308 #define SAFNUM_LABUNICAST 4
309 #define SAFNUM_TUNNEL 64 /* XXX */
310 #define SAFNUM_VPLS 65 /* XXX */
311 #define SAFNUM_MDT 66 /* XXX */
312 /* Section 4.3.4 of draft-rosen-rfc2547bis-03.txt */
313 #define SAFNUM_VPNUNICAST 128
314 #define SAFNUM_VPNMULTICAST 129
315 #define SAFNUM_VPNUNIMULTICAST 130
316 /* draft-marques-ppvpn-rt-constrain-01.txt */
317 #define SAFNUM_RT_ROUTING_INFO 132
318
319 #define BGP_VPN_RD_LEN 8
320
321 static struct tok bgp_safi_values[] = {
322 { SAFNUM_RES, "Reserved"},
323 { SAFNUM_UNICAST, "Unicast"},
324 { SAFNUM_MULTICAST, "Multicast"},
325 { SAFNUM_UNIMULTICAST, "Unicast+Multicast"},
326 { SAFNUM_LABUNICAST, "labeled Unicast"},
327 { SAFNUM_TUNNEL, "Tunnel"},
328 { SAFNUM_VPLS, "VPLS"},
329 { SAFNUM_MDT, "MDT"},
330 { SAFNUM_VPNUNICAST, "labeled VPN Unicast"},
331 { SAFNUM_VPNMULTICAST, "labeled VPN Multicast"},
332 { SAFNUM_VPNUNIMULTICAST, "labeled VPN Unicast+Multicast"},
333 { SAFNUM_RT_ROUTING_INFO, "Route Target Routing Information"}, /* draft-marques-ppvpn-rt-constrain-01.txt */
334 { 0, NULL }
335 };
336
337 /* well-known community */
338 #define BGP_COMMUNITY_NO_EXPORT 0xffffff01
339 #define BGP_COMMUNITY_NO_ADVERT 0xffffff02
340 #define BGP_COMMUNITY_NO_EXPORT_SUBCONFED 0xffffff03
341
342 /* RFC1700 address family numbers */
343 #define AFNUM_INET 1
344 #define AFNUM_INET6 2
345 #define AFNUM_NSAP 3
346 #define AFNUM_HDLC 4
347 #define AFNUM_BBN1822 5
348 #define AFNUM_802 6
349 #define AFNUM_E163 7
350 #define AFNUM_E164 8
351 #define AFNUM_F69 9
352 #define AFNUM_X121 10
353 #define AFNUM_IPX 11
354 #define AFNUM_ATALK 12
355 #define AFNUM_DECNET 13
356 #define AFNUM_BANYAN 14
357 #define AFNUM_E164NSAP 15
358 /* draft-kompella-ppvpn-l2vpn */
359 #define AFNUM_L2VPN 196 /* still to be approved by IANA */
360
361 static struct tok bgp_afi_values[] = {
362 { 0, "Reserved"},
363 { AFNUM_INET, "IPv4"},
364 { AFNUM_INET6, "IPv6"},
365 { AFNUM_NSAP, "NSAP"},
366 { AFNUM_HDLC, "HDLC"},
367 { AFNUM_BBN1822, "BBN 1822"},
368 { AFNUM_802, "802"},
369 { AFNUM_E163, "E.163"},
370 { AFNUM_E164, "E.164"},
371 { AFNUM_F69, "F.69"},
372 { AFNUM_X121, "X.121"},
373 { AFNUM_IPX, "Novell IPX"},
374 { AFNUM_ATALK, "Appletalk"},
375 { AFNUM_DECNET, "Decnet IV"},
376 { AFNUM_BANYAN, "Banyan Vines"},
377 { AFNUM_E164NSAP, "E.164 with NSAP subaddress"},
378 { AFNUM_L2VPN, "Layer-2 VPN"},
379 { 0, NULL},
380 };
381
382 /* Extended community type - draft-ietf-idr-bgp-ext-communities-05 */
383 #define BGP_EXT_COM_RT_0 0x0002 /* Route Target,Format AS(2bytes):AN(4bytes) */
384 #define BGP_EXT_COM_RT_1 0x0102 /* Route Target,Format IP address:AN(2bytes) */
385 #define BGP_EXT_COM_RT_2 0x0202 /* Route Target,Format AN(4bytes):local(2bytes) */
386 #define BGP_EXT_COM_RO_0 0x0003 /* Route Origin,Format AS(2bytes):AN(4bytes) */
387 #define BGP_EXT_COM_RO_1 0x0103 /* Route Origin,Format IP address:AN(2bytes) */
388 #define BGP_EXT_COM_RO_2 0x0203 /* Route Origin,Format AN(4bytes):local(2bytes) */
389 #define BGP_EXT_COM_LINKBAND 0x4004 /* Link Bandwidth,Format AS(2B):Bandwidth(4B) */
390 /* rfc2547 bgp-mpls-vpns */
391 #define BGP_EXT_COM_CISCO_MCAST 0x0009 /* cisco proprietary */
392
393 #define BGP_EXT_COM_VPN_ORIGIN 0x0005 /* OSPF Domain ID / VPN of Origin - draft-rosen-vpns-ospf-bgp-mpls */
394 #define BGP_EXT_COM_VPN_ORIGIN2 0x0105 /* duplicate - keep for backwards compatability */
395 #define BGP_EXT_COM_VPN_ORIGIN3 0x0205 /* duplicate - keep for backwards compatability */
396 #define BGP_EXT_COM_VPN_ORIGIN4 0x8005 /* duplicate - keep for backwards compatability */
397
398 #define BGP_EXT_COM_OSPF_RTYPE 0x0306 /* OSPF Route Type,Format Area(4B):RouteType(1B):Options(1B) */
399 #define BGP_EXT_COM_OSPF_RTYPE2 0x8000 /* duplicate - keep for backwards compatability */
400
401 #define BGP_EXT_COM_OSPF_RID 0x0107 /* OSPF Router ID,Format RouterID(4B):Unused(2B) */
402 #define BGP_EXT_COM_OSPF_RID2 0x8001 /* duplicate - keep for backwards compatability */
403
404 #define BGP_EXT_COM_L2INFO 0x800a /* draft-kompella-ppvpn-l2vpn */
405
406 /* http://www.cisco.com/en/US/tech/tk436/tk428/technologies_tech_note09186a00801eb09a.shtml */
407 #define BGP_EXT_COM_EIGRP_GEN 0x8800
408 #define BGP_EXT_COM_EIGRP_METRIC_AS_DELAY 0x8801
409 #define BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW 0x8802
410 #define BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU 0x8803
411 #define BGP_EXT_COM_EIGRP_EXT_REMAS_REMID 0x8804
412 #define BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC 0x8805
413
414 static struct tok bgp_extd_comm_flag_values[] = {
415 { 0x8000, "vendor-specific"},
416 { 0x4000, "non-transitive"},
417 { 0, NULL},
418 };
419
420 static struct tok bgp_extd_comm_subtype_values[] = {
421 { BGP_EXT_COM_RT_0, "target"},
422 { BGP_EXT_COM_RT_1, "target"},
423 { BGP_EXT_COM_RT_2, "target"},
424 { BGP_EXT_COM_RO_0, "origin"},
425 { BGP_EXT_COM_RO_1, "origin"},
426 { BGP_EXT_COM_RO_2, "origin"},
427 { BGP_EXT_COM_LINKBAND, "link-BW"},
428 { BGP_EXT_COM_CISCO_MCAST, "mdt-group"},
429 { BGP_EXT_COM_VPN_ORIGIN, "ospf-domain"},
430 { BGP_EXT_COM_VPN_ORIGIN2, "ospf-domain"},
431 { BGP_EXT_COM_VPN_ORIGIN3, "ospf-domain"},
432 { BGP_EXT_COM_VPN_ORIGIN4, "ospf-domain"},
433 { BGP_EXT_COM_OSPF_RTYPE, "ospf-route-type"},
434 { BGP_EXT_COM_OSPF_RTYPE2, "ospf-route-type"},
435 { BGP_EXT_COM_OSPF_RID, "ospf-router-id"},
436 { BGP_EXT_COM_OSPF_RID2, "ospf-router-id"},
437 { BGP_EXT_COM_L2INFO, "layer2-info"},
438 { BGP_EXT_COM_EIGRP_GEN , "eigrp-general-route (flag, tag)" },
439 { BGP_EXT_COM_EIGRP_METRIC_AS_DELAY , "eigrp-route-metric (AS, delay)" },
440 { BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW , "eigrp-route-metric (reliability, nexthop, bandwidth)" },
441 { BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU , "eigrp-route-metric (load, MTU)" },
442 { BGP_EXT_COM_EIGRP_EXT_REMAS_REMID , "eigrp-external-route (remote-AS, remote-ID)" },
443 { BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC , "eigrp-external-route (remote-proto, remote-metric)" },
444 { 0, NULL},
445 };
446
447 /* OSPF codes for BGP_EXT_COM_OSPF_RTYPE draft-rosen-vpns-ospf-bgp-mpls */
448 #define BGP_OSPF_RTYPE_RTR 1 /* OSPF Router LSA */
449 #define BGP_OSPF_RTYPE_NET 2 /* OSPF Network LSA */
450 #define BGP_OSPF_RTYPE_SUM 3 /* OSPF Summary LSA */
451 #define BGP_OSPF_RTYPE_EXT 5 /* OSPF External LSA, note that ASBR doesn't apply to MPLS-VPN */
452 #define BGP_OSPF_RTYPE_NSSA 7 /* OSPF NSSA External*/
453 #define BGP_OSPF_RTYPE_SHAM 129 /* OSPF-MPLS-VPN Sham link */
454 #define BGP_OSPF_RTYPE_METRIC_TYPE 0x1 /* LSB of RTYPE Options Field */
455
456 static struct tok bgp_extd_comm_ospf_rtype_values[] = {
457 { BGP_OSPF_RTYPE_RTR, "Router" },
458 { BGP_OSPF_RTYPE_NET, "Network" },
459 { BGP_OSPF_RTYPE_SUM, "Summary" },
460 { BGP_OSPF_RTYPE_EXT, "External" },
461 { BGP_OSPF_RTYPE_NSSA,"NSSA External" },
462 { BGP_OSPF_RTYPE_SHAM,"MPLS-VPN Sham" },
463 { 0, NULL },
464 };
465
466 int
467 decode_prefix4(const u_char *pptr, char *buf, u_int buflen)
468 {
469 struct in_addr addr;
470 u_int plen;
471
472 TCHECK(pptr[0]);
473 plen = pptr[0];
474 if (32 < plen)
475 return -1;
476
477 memset(&addr, 0, sizeof(addr));
478 TCHECK2(pptr[1], (plen + 7) / 8);
479 memcpy(&addr, &pptr[1], (plen + 7) / 8);
480 if (plen % 8) {
481 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
482 ((0xff00 >> (plen % 8)) & 0xff);
483 }
484 snprintf(buf, buflen, "%s/%d", getname((u_char *)&addr), plen);
485 return 1 + (plen + 7) / 8;
486
487 trunc:
488 return -2;
489 }
490
491 static int
492 decode_labeled_prefix4(const u_char *pptr, char *buf, u_int buflen)
493 {
494 struct in_addr addr;
495 u_int plen;
496
497 TCHECK(pptr[0]);
498 plen = pptr[0]; /* get prefix length */
499
500 /* this is one of the weirdnesses of rfc3107
501 the label length (actually the label + COS bits)
502 is added to the prefix length;
503 we also do only read out just one label -
504 there is no real application for advertisement of
505 stacked labels in a a single BGP message
506 */
507
508 if (24 > plen)
509 return -1;
510
511 plen-=24; /* adjust prefixlen - labellength */
512
513 if (32 < plen)
514 return -1;
515
516 memset(&addr, 0, sizeof(addr));
517 TCHECK2(pptr[4], (plen + 7) / 8);
518 memcpy(&addr, &pptr[4], (plen + 7) / 8);
519 if (plen % 8) {
520 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
521 ((0xff00 >> (plen % 8)) & 0xff);
522 }
523 /* the label may get offsetted by 4 bits so lets shift it right */
524 snprintf(buf, buflen, "%s/%d, label:%u %s",
525 getname((u_char *)&addr),
526 plen,
527 EXTRACT_24BITS(pptr+1)>>4,
528 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
529
530 return 4 + (plen + 7) / 8;
531
532 trunc:
533 return -2;
534 }
535
536 /* RDs and RTs share the same semantics
537 * we use bgp_vpn_rd_print for
538 * printing route targets inside a NLRI */
539 char *
540 bgp_vpn_rd_print (const u_char *pptr) {
541
542 /* allocate space for the largest possible string */
543 static char rd[sizeof("xxxxxxxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")];
544 char *pos = rd;
545
546 /* ok lets load the RD format */
547 switch (EXTRACT_16BITS(pptr)) {
548
549 /* AS:IP-address fmt*/
550 case 0:
551 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u.%u.%u.%u",
552 EXTRACT_16BITS(pptr+2), *(pptr+4), *(pptr+5), *(pptr+6), *(pptr+7));
553 break;
554 /* IP-address:AS fmt*/
555
556 case 1:
557 snprintf(pos, sizeof(rd) - (pos - rd), "%u.%u.%u.%u:%u",
558 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
559 break;
560
561 /* 4-byte-AS:number fmt*/
562 case 2:
563 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u (%u.%u.%u.%u:%u)",
564 EXTRACT_32BITS(pptr+2), EXTRACT_16BITS(pptr+6),
565 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
566 break;
567 default:
568 snprintf(pos, sizeof(rd) - (pos - rd), "unknown RD format");
569 break;
570 }
571 pos += strlen(pos);
572 *(pos) = '\0';
573 return (rd);
574 }
575
576 static int
577 decode_rt_routing_info(const u_char *pptr, char *buf, u_int buflen)
578 {
579 u_int8_t route_target[8];
580 u_int plen;
581
582 TCHECK(pptr[0]);
583 plen = pptr[0]; /* get prefix length */
584
585 if (0 == plen)
586 return 1; /* default route target */
587
588 if (32 > plen)
589 return -1;
590
591 plen-=32; /* adjust prefix length */
592
593 if (64 < plen)
594 return -1;
595
596 memset(&route_target, 0, sizeof(route_target));
597 TCHECK2(pptr[1], (plen + 7) / 8);
598 memcpy(&route_target, &pptr[1], (plen + 7) / 8);
599 if (plen % 8) {
600 ((u_char *)&route_target)[(plen + 7) / 8 - 1] &=
601 ((0xff00 >> (plen % 8)) & 0xff);
602 }
603 snprintf(buf, buflen, "origin AS: %u, route target %s",
604 EXTRACT_32BITS(pptr+1),
605 bgp_vpn_rd_print((u_char *)&route_target));
606
607 return 5 + (plen + 7) / 8;
608
609 trunc:
610 return -2;
611 }
612
613 static int
614 decode_labeled_vpn_prefix4(const u_char *pptr, char *buf, u_int buflen)
615 {
616 struct in_addr addr;
617 u_int plen;
618
619 TCHECK(pptr[0]);
620 plen = pptr[0]; /* get prefix length */
621
622 if ((24+64) > plen)
623 return -1;
624
625 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
626
627 if (32 < plen)
628 return -1;
629
630 memset(&addr, 0, sizeof(addr));
631 TCHECK2(pptr[12], (plen + 7) / 8);
632 memcpy(&addr, &pptr[12], (plen + 7) / 8);
633 if (plen % 8) {
634 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
635 ((0xff00 >> (plen % 8)) & 0xff);
636 }
637 /* the label may get offsetted by 4 bits so lets shift it right */
638 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
639 bgp_vpn_rd_print(pptr+4),
640 getname((u_char *)&addr),
641 plen,
642 EXTRACT_24BITS(pptr+1)>>4,
643 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
644
645 return 12 + (plen + 7) / 8;
646
647 trunc:
648 return -2;
649 }
650
651 static int
652 decode_labeled_vpn_l2(const u_char *pptr, char *buf, u_int buflen)
653 {
654 int plen,tlen,strlen,tlv_type,tlv_len,ttlv_len;
655
656 TCHECK2(pptr[0], 2);
657 plen=EXTRACT_16BITS(pptr);
658 tlen=plen;
659 pptr+=2;
660 TCHECK2(pptr[0],15);
661 strlen=snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u",
662 bgp_vpn_rd_print(pptr),
663 EXTRACT_16BITS(pptr+8),
664 EXTRACT_16BITS(pptr+10),
665 EXTRACT_24BITS(pptr+12)>>4); /* the label is offsetted by 4 bits so lets shift it right */
666 pptr+=15;
667 tlen-=15;
668
669 /* ok now the variable part - lets read out TLVs*/
670 while (tlen>0) {
671 if (tlen < 3)
672 return -1;
673 TCHECK2(pptr[0], 3);
674 tlv_type=*pptr++;
675 tlv_len=EXTRACT_16BITS(pptr);
676 ttlv_len=tlv_len;
677 pptr+=2;
678
679 switch(tlv_type) {
680 case 1:
681 strlen+=snprintf(buf+strlen,buflen-strlen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
682 tlv_type,
683 tlv_len);
684 ttlv_len=ttlv_len/8+1; /* how many bytes do we need to read ? */
685 while (ttlv_len>0) {
686 TCHECK(pptr[0]);
687 strlen+=snprintf(buf+strlen,buflen-strlen, "%02x",*pptr++);
688 ttlv_len--;
689 }
690 break;
691 default:
692 snprintf(buf+strlen,buflen-strlen, "\n\t\tunknown TLV #%u, length: %u",
693 tlv_type,
694 tlv_len);
695 break;
696 }
697 tlen-=(tlv_len<<3); /* the tlv-length is expressed in bits so lets shift it tright */
698 }
699 return plen+2;
700
701 trunc:
702 return -2;
703 }
704
705 #ifdef INET6
706 int
707 decode_prefix6(const u_char *pd, char *buf, u_int buflen)
708 {
709 struct in6_addr addr;
710 u_int plen;
711
712 TCHECK(pd[0]);
713 plen = pd[0];
714 if (128 < plen)
715 return -1;
716
717 memset(&addr, 0, sizeof(addr));
718 TCHECK2(pd[1], (plen + 7) / 8);
719 memcpy(&addr, &pd[1], (plen + 7) / 8);
720 if (plen % 8) {
721 addr.s6_addr[(plen + 7) / 8 - 1] &=
722 ((0xff00 >> (plen % 8)) & 0xff);
723 }
724 snprintf(buf, buflen, "%s/%d", getname6((u_char *)&addr), plen);
725 return 1 + (plen + 7) / 8;
726
727 trunc:
728 return -2;
729 }
730
731 static int
732 decode_labeled_prefix6(const u_char *pptr, char *buf, u_int buflen)
733 {
734 struct in6_addr addr;
735 u_int plen;
736
737 TCHECK(pptr[0]);
738 plen = pptr[0]; /* get prefix length */
739
740 if (24 > plen)
741 return -1;
742
743 plen-=24; /* adjust prefixlen - labellength */
744
745 if (128 < plen)
746 return -1;
747
748 memset(&addr, 0, sizeof(addr));
749 TCHECK2(pptr[4], (plen + 7) / 8);
750 memcpy(&addr, &pptr[4], (plen + 7) / 8);
751 if (plen % 8) {
752 addr.s6_addr[(plen + 7) / 8 - 1] &=
753 ((0xff00 >> (plen % 8)) & 0xff);
754 }
755 /* the label may get offsetted by 4 bits so lets shift it right */
756 snprintf(buf, buflen, "%s/%d, label:%u %s",
757 getname6((u_char *)&addr),
758 plen,
759 EXTRACT_24BITS(pptr+1)>>4,
760 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
761
762 return 4 + (plen + 7) / 8;
763
764 trunc:
765 return -2;
766 }
767
768 static int
769 decode_labeled_vpn_prefix6(const u_char *pptr, char *buf, u_int buflen)
770 {
771 struct in6_addr addr;
772 u_int plen;
773
774 TCHECK(pptr[0]);
775 plen = pptr[0]; /* get prefix length */
776
777 if ((24+64) > plen)
778 return -1;
779
780 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
781
782 if (128 < plen)
783 return -1;
784
785 memset(&addr, 0, sizeof(addr));
786 TCHECK2(pptr[12], (plen + 7) / 8);
787 memcpy(&addr, &pptr[12], (plen + 7) / 8);
788 if (plen % 8) {
789 addr.s6_addr[(plen + 7) / 8 - 1] &=
790 ((0xff00 >> (plen % 8)) & 0xff);
791 }
792 /* the label may get offsetted by 4 bits so lets shift it right */
793 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
794 bgp_vpn_rd_print(pptr+4),
795 getname6((u_char *)&addr),
796 plen,
797 EXTRACT_24BITS(pptr+1)>>4,
798 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
799
800 return 12 + (plen + 7) / 8;
801
802 trunc:
803 return -2;
804 }
805 #endif
806
807 static int
808 decode_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
809 {
810 u_int8_t addr[19];
811 u_int plen;
812
813 TCHECK(pptr[0]);
814 plen = pptr[0]; /* get prefix length */
815
816 if (152 < plen)
817 return -1;
818
819 memset(&addr, 0, sizeof(addr));
820 TCHECK2(pptr[4], (plen + 7) / 8);
821 memcpy(&addr, &pptr[4], (plen + 7) / 8);
822 if (plen % 8) {
823 addr[(plen + 7) / 8 - 1] &=
824 ((0xff00 >> (plen % 8)) & 0xff);
825 }
826 snprintf(buf, buflen, "%s/%d",
827 isonsap_string(addr,(plen + 7) / 8),
828 plen);
829
830 return 1 + (plen + 7) / 8;
831
832 trunc:
833 return -2;
834 }
835
836 static int
837 decode_labeled_vpn_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
838 {
839 u_int8_t addr[19];
840 u_int plen;
841
842 TCHECK(pptr[0]);
843 plen = pptr[0]; /* get prefix length */
844
845 if ((24+64) > plen)
846 return -1;
847
848 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
849
850 if (152 < plen)
851 return -1;
852
853 memset(&addr, 0, sizeof(addr));
854 TCHECK2(pptr[12], (plen + 7) / 8);
855 memcpy(&addr, &pptr[12], (plen + 7) / 8);
856 if (plen % 8) {
857 addr[(plen + 7) / 8 - 1] &=
858 ((0xff00 >> (plen % 8)) & 0xff);
859 }
860 /* the label may get offsetted by 4 bits so lets shift it right */
861 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
862 bgp_vpn_rd_print(pptr+4),
863 isonsap_string(addr,(plen + 7) / 8),
864 plen,
865 EXTRACT_24BITS(pptr+1)>>4,
866 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
867
868 return 12 + (plen + 7) / 8;
869
870 trunc:
871 return -2;
872 }
873
874 static int
875 bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len)
876 {
877 int i;
878 u_int16_t af;
879 u_int8_t safi, snpa, nhlen;
880 union { /* copy buffer for bandwidth values */
881 float f;
882 u_int32_t i;
883 } bw;
884 int advance;
885 int tlen;
886 const u_char *tptr;
887 char buf[MAXHOSTNAMELEN + 100];
888 char tokbuf[TOKBUFSIZE];
889
890 tptr = pptr;
891 tlen=len;
892
893 switch (attr->bgpa_type) {
894 case BGPTYPE_ORIGIN:
895 if (len != 1)
896 printf("invalid len");
897 else {
898 TCHECK(*tptr);
899 printf("%s", tok2strbuf(bgp_origin_values,
900 "Unknown Origin Typecode",
901 tptr[0],
902 tokbuf, sizeof(tokbuf)));
903 }
904 break;
905
906 case BGPTYPE_AS_PATH:
907 if (len % 2) {
908 printf("invalid len");
909 break;
910 }
911 if (!len) {
912 printf("empty");
913 break;
914 }
915
916 while (tptr < pptr + len) {
917 TCHECK(tptr[0]);
918 printf("%s", tok2strbuf(bgp_as_path_segment_open_values,
919 "?", tptr[0],
920 tokbuf, sizeof(tokbuf)));
921 for (i = 0; i < tptr[1] * 2; i += 2) {
922 TCHECK2(tptr[2 + i], 2);
923 printf("%u ", EXTRACT_16BITS(&tptr[2 + i]));
924 }
925 TCHECK(tptr[0]);
926 printf("%s", tok2strbuf(bgp_as_path_segment_close_values,
927 "?", tptr[0],
928 tokbuf, sizeof(tokbuf)));
929 TCHECK(tptr[1]);
930 tptr += 2 + tptr[1] * 2;
931 }
932 break;
933 case BGPTYPE_NEXT_HOP:
934 if (len != 4)
935 printf("invalid len");
936 else {
937 TCHECK2(tptr[0], 4);
938 printf("%s", getname(tptr));
939 }
940 break;
941 case BGPTYPE_MULTI_EXIT_DISC:
942 case BGPTYPE_LOCAL_PREF:
943 if (len != 4)
944 printf("invalid len");
945 else {
946 TCHECK2(tptr[0], 4);
947 printf("%u", EXTRACT_32BITS(tptr));
948 }
949 break;
950 case BGPTYPE_ATOMIC_AGGREGATE:
951 if (len != 0)
952 printf("invalid len");
953 break;
954 case BGPTYPE_AGGREGATOR:
955 if (len != 6) {
956 printf("invalid len");
957 break;
958 }
959 TCHECK2(tptr[0], 6);
960 printf(" AS #%u, origin %s", EXTRACT_16BITS(tptr),
961 getname(tptr + 2));
962 break;
963 case BGPTYPE_COMMUNITIES:
964 if (len % 4) {
965 printf("invalid len");
966 break;
967 }
968 while (tlen>0) {
969 u_int32_t comm;
970 TCHECK2(tptr[0], 4);
971 comm = EXTRACT_32BITS(tptr);
972 switch (comm) {
973 case BGP_COMMUNITY_NO_EXPORT:
974 printf(" NO_EXPORT");
975 break;
976 case BGP_COMMUNITY_NO_ADVERT:
977 printf(" NO_ADVERTISE");
978 break;
979 case BGP_COMMUNITY_NO_EXPORT_SUBCONFED:
980 printf(" NO_EXPORT_SUBCONFED");
981 break;
982 default:
983 printf("%u:%u%s",
984 (comm >> 16) & 0xffff,
985 comm & 0xffff,
986 (tlen>4) ? ", " : "");
987 break;
988 }
989 tlen -=4;
990 tptr +=4;
991 }
992 break;
993 case BGPTYPE_ORIGINATOR_ID:
994 if (len != 4) {
995 printf("invalid len");
996 break;
997 }
998 TCHECK2(tptr[0], 4);
999 printf("%s",getname(tptr));
1000 break;
1001 case BGPTYPE_CLUSTER_LIST:
1002 if (len % 4) {
1003 printf("invalid len");
1004 break;
1005 }
1006 while (tlen>0) {
1007 TCHECK2(tptr[0], 4);
1008 printf("%s%s",
1009 getname(tptr),
1010 (tlen>4) ? ", " : "");
1011 tlen -=4;
1012 tptr +=4;
1013 }
1014 break;
1015 case BGPTYPE_MP_REACH_NLRI:
1016 TCHECK2(tptr[0], 3);
1017 af = EXTRACT_16BITS(tptr);
1018 safi = tptr[2];
1019
1020 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1021 tok2strbuf(bgp_afi_values, "Unknown AFI", af,
1022 tokbuf, sizeof(tokbuf)),
1023 af,
1024 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1025 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1026 tokbuf, sizeof(tokbuf)),
1027 safi);
1028
1029 switch(af<<8 | safi) {
1030 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1031 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1032 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1033 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1034 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1035 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1036 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1037 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1038 #ifdef INET6
1039 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1040 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1041 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1042 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1043 case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1044 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1045 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1046 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1047 #endif
1048 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1049 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1050 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1051 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1052 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1053 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1054 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1055 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1056 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1057 break;
1058 default:
1059 TCHECK2(tptr[0], tlen);
1060 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1061 if (vflag <= 1)
1062 print_unknown_data(tptr,"\n\t ",tlen);
1063 goto done;
1064 break;
1065 }
1066
1067 tptr +=3;
1068
1069 TCHECK(tptr[0]);
1070 nhlen = tptr[0];
1071 tlen = nhlen;
1072 tptr++;
1073
1074 if (tlen) {
1075 printf("\n\t nexthop: ");
1076 while (tlen > 0) {
1077 switch(af<<8 | safi) {
1078 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1079 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1080 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1081 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1082 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1083 if (tlen < (int)sizeof(struct in_addr)) {
1084 printf("invalid len");
1085 tlen = 0;
1086 } else {
1087 TCHECK2(tptr[0], sizeof(struct in_addr));
1088 printf("%s",getname(tptr));
1089 tlen -= sizeof(struct in_addr);
1090 tptr += sizeof(struct in_addr);
1091 }
1092 break;
1093 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1094 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1095 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1096 if (tlen < (int)(sizeof(struct in_addr)+BGP_VPN_RD_LEN)) {
1097 printf("invalid len");
1098 tlen = 0;
1099 } else {
1100 TCHECK2(tptr[0], sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1101 printf("RD: %s, %s",
1102 bgp_vpn_rd_print(tptr),
1103 getname(tptr+BGP_VPN_RD_LEN));
1104 tlen -= (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1105 tptr += (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1106 }
1107 break;
1108 #ifdef INET6
1109 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1110 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1111 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1112 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1113 case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1114 if (tlen < (int)sizeof(struct in6_addr)) {
1115 printf("invalid len");
1116 tlen = 0;
1117 } else {
1118 TCHECK2(tptr[0], sizeof(struct in6_addr));
1119 printf("%s", getname6(tptr));
1120 tlen -= sizeof(struct in6_addr);
1121 tptr += sizeof(struct in6_addr);
1122 }
1123 break;
1124 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1125 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1126 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1127 if (tlen < (int)(sizeof(struct in6_addr)+BGP_VPN_RD_LEN)) {
1128 printf("invalid len");
1129 tlen = 0;
1130 } else {
1131 TCHECK2(tptr[0], sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1132 printf("RD: %s, %s",
1133 bgp_vpn_rd_print(tptr),
1134 getname6(tptr+BGP_VPN_RD_LEN));
1135 tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1136 tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1137 }
1138 break;
1139 #endif
1140 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1141 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1142 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1143 if (tlen < (int)sizeof(struct in_addr)) {
1144 printf("invalid len");
1145 tlen = 0;
1146 } else {
1147 TCHECK2(tptr[0], sizeof(struct in_addr));
1148 printf("%s", getname(tptr));
1149 tlen -= (sizeof(struct in_addr));
1150 tptr += (sizeof(struct in_addr));
1151 }
1152 break;
1153 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1154 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1155 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1156 TCHECK2(tptr[0], tlen);
1157 printf("%s",isonsap_string(tptr,tlen));
1158 tptr += tlen;
1159 tlen = 0;
1160 break;
1161
1162 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1163 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1164 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1165 if (tlen < BGP_VPN_RD_LEN+1) {
1166 printf("invalid len");
1167 tlen = 0;
1168 } else {
1169 TCHECK2(tptr[0], tlen);
1170 printf("RD: %s, %s",
1171 bgp_vpn_rd_print(tptr),
1172 isonsap_string(tptr+BGP_VPN_RD_LEN,tlen-BGP_VPN_RD_LEN));
1173 /* rfc986 mapped IPv4 address ? */
1174 if (EXTRACT_32BITS(tptr+BGP_VPN_RD_LEN) == 0x47000601)
1175 printf(" = %s", getname(tptr+BGP_VPN_RD_LEN+4));
1176 #ifdef INET6
1177 /* rfc1888 mapped IPv6 address ? */
1178 else if (EXTRACT_24BITS(tptr+BGP_VPN_RD_LEN) == 0x350000)
1179 printf(" = %s", getname6(tptr+BGP_VPN_RD_LEN+3));
1180 #endif
1181 tptr += tlen;
1182 tlen = 0;
1183 }
1184 break;
1185 default:
1186 TCHECK2(tptr[0], tlen);
1187 printf("no AFI %u/SAFI %u decoder",af,safi);
1188 if (vflag <= 1)
1189 print_unknown_data(tptr,"\n\t ",tlen);
1190 tptr += tlen;
1191 tlen = 0;
1192 goto done;
1193 break;
1194 }
1195 }
1196 }
1197 printf(", nh-length: %u", nhlen);
1198 tptr += tlen;
1199
1200 TCHECK(tptr[0]);
1201 snpa = tptr[0];
1202 tptr++;
1203
1204 if (snpa) {
1205 printf("\n\t %u SNPA", snpa);
1206 for (/*nothing*/; snpa > 0; snpa--) {
1207 TCHECK(tptr[0]);
1208 printf("\n\t %d bytes", tptr[0]);
1209 tptr += tptr[0] + 1;
1210 }
1211 } else {
1212 printf(", no SNPA");
1213 }
1214
1215 while (len - (tptr - pptr) > 0) {
1216 switch (af<<8 | safi) {
1217 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1218 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1219 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1220 advance = decode_prefix4(tptr, buf, sizeof(buf));
1221 if (advance == -1)
1222 printf("\n\t (illegal prefix length)");
1223 else if (advance == -2)
1224 goto trunc;
1225 else
1226 printf("\n\t %s", buf);
1227 break;
1228 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1229 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1230 if (advance == -1)
1231 printf("\n\t (illegal prefix length)");
1232 else if (advance == -2)
1233 goto trunc;
1234 else
1235 printf("\n\t %s", buf);
1236 break;
1237 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1238 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1239 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1240 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1241 if (advance == -1)
1242 printf("\n\t (illegal prefix length)");
1243 else if (advance == -2)
1244 goto trunc;
1245 else
1246 printf("\n\t %s", buf);
1247 break;
1248 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1249 advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1250 if (advance == -1)
1251 printf("\n\t (illegal prefix length)");
1252 else if (advance == -2)
1253 goto trunc;
1254 else
1255 printf("\n\t %s", buf);
1256 break;
1257 #ifdef INET6
1258 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1259 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1260 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1261 advance = decode_prefix6(tptr, buf, sizeof(buf));
1262 if (advance == -1)
1263 printf("\n\t (illegal prefix length)");
1264 else if (advance == -2)
1265 goto trunc;
1266 else
1267 printf("\n\t %s", buf);
1268 break;
1269 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1270 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1271 if (advance == -1)
1272 printf("\n\t (illegal prefix length)");
1273 else if (advance == -2)
1274 goto trunc;
1275 else
1276 printf("\n\t %s", buf);
1277 break;
1278 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1279 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1280 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1281 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1282 if (advance == -1)
1283 printf("\n\t (illegal prefix length)");
1284 else if (advance == -2)
1285 goto trunc;
1286 else
1287 printf("\n\t %s", buf);
1288 break;
1289 case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1290 advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1291 if (advance == -1)
1292 printf("\n\t (illegal prefix length)");
1293 else if (advance == -2)
1294 goto trunc;
1295 else
1296 printf("\n\t %s", buf);
1297 break;
1298 #endif
1299 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1300 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1301 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1302 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1303 if (advance == -1)
1304 printf("\n\t (illegal length)");
1305 else if (advance == -2)
1306 goto trunc;
1307 else
1308 printf("\n\t %s", buf);
1309 break;
1310 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1311 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1312 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1313 advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1314 if (advance == -1)
1315 printf("\n\t (illegal prefix length)");
1316 else if (advance == -2)
1317 goto trunc;
1318 else
1319 printf("\n\t %s", buf);
1320 break;
1321 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1322 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1323 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1324 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1325 if (advance == -1)
1326 printf("\n\t (illegal prefix length)");
1327 else if (advance == -2)
1328 goto trunc;
1329 else
1330 printf("\n\t %s", buf);
1331 break;
1332 default:
1333 TCHECK2(*tptr,tlen);
1334 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1335 if (vflag <= 1)
1336 print_unknown_data(tptr,"\n\t ",tlen);
1337 advance = 0;
1338 tptr = pptr + len;
1339 break;
1340 }
1341 if (advance < 0)
1342 break;
1343 tptr += advance;
1344 }
1345 done:
1346 break;
1347
1348 case BGPTYPE_MP_UNREACH_NLRI:
1349 TCHECK2(tptr[0], BGP_MP_NLRI_MINSIZE);
1350 af = EXTRACT_16BITS(tptr);
1351 safi = tptr[2];
1352
1353 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1354 tok2strbuf(bgp_afi_values, "Unknown AFI", af,
1355 tokbuf, sizeof(tokbuf)),
1356 af,
1357 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1358 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1359 tokbuf, sizeof(tokbuf)),
1360 safi);
1361
1362 if (len == BGP_MP_NLRI_MINSIZE)
1363 printf("\n\t End-of-Rib Marker (empty NLRI)");
1364
1365 tptr += 3;
1366
1367 while (len - (tptr - pptr) > 0) {
1368 switch (af<<8 | safi) {
1369 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1370 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1371 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1372 advance = decode_prefix4(tptr, buf, sizeof(buf));
1373 if (advance == -1)
1374 printf("\n\t (illegal prefix length)");
1375 else if (advance == -2)
1376 goto trunc;
1377 else
1378 printf("\n\t %s", buf);
1379 break;
1380 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1381 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1382 if (advance == -1)
1383 printf("\n\t (illegal prefix length)");
1384 else if (advance == -2)
1385 goto trunc;
1386 else
1387 printf("\n\t %s", buf);
1388 break;
1389 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1390 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1391 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1392 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1393 if (advance == -1)
1394 printf("\n\t (illegal prefix length)");
1395 else if (advance == -2)
1396 goto trunc;
1397 else
1398 printf("\n\t %s", buf);
1399 break;
1400 #ifdef INET6
1401 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1402 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1403 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1404 advance = decode_prefix6(tptr, buf, sizeof(buf));
1405 if (advance == -1)
1406 printf("\n\t (illegal prefix length)");
1407 else if (advance == -2)
1408 goto trunc;
1409 else
1410 printf("\n\t %s", buf);
1411 break;
1412 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1413 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1414 if (advance == -1)
1415 printf("\n\t (illegal prefix length)");
1416 else if (advance == -2)
1417 goto trunc;
1418 else
1419 printf("\n\t %s", buf);
1420 break;
1421 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1422 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1423 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1424 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1425 if (advance == -1)
1426 printf("\n\t (illegal prefix length)");
1427 else if (advance == -2)
1428 goto trunc;
1429 else
1430 printf("\n\t %s", buf);
1431 break;
1432 #endif
1433 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1434 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1435 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1436 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1437 if (advance == -1)
1438 printf("\n\t (illegal length)");
1439 else if (advance == -2)
1440 goto trunc;
1441 else
1442 printf("\n\t %s", buf);
1443 break;
1444 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1445 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1446 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1447 advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1448 if (advance == -1)
1449 printf("\n\t (illegal prefix length)");
1450 else if (advance == -2)
1451 goto trunc;
1452 else
1453 printf("\n\t %s", buf);
1454 break;
1455 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1456 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1457 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1458 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1459 if (advance == -1)
1460 printf("\n\t (illegal prefix length)");
1461 else if (advance == -2)
1462 goto trunc;
1463 else
1464 printf("\n\t %s", buf);
1465 break;
1466 default:
1467 TCHECK2(*(tptr-3),tlen);
1468 printf("no AFI %u / SAFI %u decoder",af,safi);
1469 if (vflag <= 1)
1470 print_unknown_data(tptr-3,"\n\t ",tlen);
1471 advance = 0;
1472 tptr = pptr + len;
1473 break;
1474 }
1475 if (advance < 0)
1476 break;
1477 tptr += advance;
1478 }
1479 break;
1480 case BGPTYPE_EXTD_COMMUNITIES:
1481 if (len % 8) {
1482 printf("invalid len");
1483 break;
1484 }
1485 while (tlen>0) {
1486 u_int16_t extd_comm;
1487
1488 TCHECK2(tptr[0], 2);
1489 extd_comm=EXTRACT_16BITS(tptr);
1490
1491 printf("\n\t %s (0x%04x), Flags [%s]",
1492 tok2strbuf(bgp_extd_comm_subtype_values,
1493 "unknown extd community typecode",
1494 extd_comm, tokbuf, sizeof(tokbuf)),
1495 extd_comm,
1496 bittok2str(bgp_extd_comm_flag_values, "none", extd_comm));
1497
1498 TCHECK2(*(tptr+2), 6);
1499 switch(extd_comm) {
1500 case BGP_EXT_COM_RT_0:
1501 case BGP_EXT_COM_RO_0:
1502 printf(": %u:%s",
1503 EXTRACT_16BITS(tptr+2),
1504 getname(tptr+4));
1505 break;
1506 case BGP_EXT_COM_RT_1:
1507 case BGP_EXT_COM_RO_1:
1508 printf(": %s:%u",
1509 getname(tptr+2),
1510 EXTRACT_16BITS(tptr+6));
1511 break;
1512 case BGP_EXT_COM_RT_2:
1513 case BGP_EXT_COM_RO_2:
1514 printf(": %u:%u",
1515 EXTRACT_32BITS(tptr+2),
1516 EXTRACT_16BITS(tptr+6));
1517 break;
1518 case BGP_EXT_COM_LINKBAND:
1519 bw.i = EXTRACT_32BITS(tptr+2);
1520 printf(": bandwidth: %.3f Mbps",
1521 bw.f*8/1000000);
1522 break;
1523 case BGP_EXT_COM_CISCO_MCAST:
1524 printf(": AS %u, group %s",
1525 EXTRACT_16BITS(tptr+2),
1526 getname(tptr+4));
1527 break;
1528 case BGP_EXT_COM_VPN_ORIGIN:
1529 case BGP_EXT_COM_VPN_ORIGIN2:
1530 case BGP_EXT_COM_VPN_ORIGIN3:
1531 case BGP_EXT_COM_VPN_ORIGIN4:
1532 case BGP_EXT_COM_OSPF_RID:
1533 case BGP_EXT_COM_OSPF_RID2:
1534 printf("%s", getname(tptr+2));
1535 break;
1536 case BGP_EXT_COM_OSPF_RTYPE:
1537 case BGP_EXT_COM_OSPF_RTYPE2:
1538 printf(": area:%s, router-type:%s, metric-type:%s%s",
1539 getname(tptr+2),
1540 tok2strbuf(bgp_extd_comm_ospf_rtype_values,
1541 "unknown (0x%02x)",
1542 *(tptr+6),
1543 tokbuf, sizeof(tokbuf)),
1544 (*(tptr+7) & BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "",
1545 (*(tptr+6) == (BGP_OSPF_RTYPE_EXT ||BGP_OSPF_RTYPE_NSSA )) ? "E1" : "");
1546 break;
1547 case BGP_EXT_COM_L2INFO:
1548 printf(": %s Control Flags [0x%02x]:MTU %u",
1549 tok2strbuf(l2vpn_encaps_values,
1550 "unknown encaps",
1551 *(tptr+2),
1552 tokbuf, sizeof(tokbuf)),
1553 *(tptr+3),
1554 EXTRACT_16BITS(tptr+4));
1555 break;
1556 default:
1557 TCHECK2(*tptr,8);
1558 print_unknown_data(tptr,"\n\t ",8);
1559 break;
1560 }
1561 tlen -=8;
1562 tptr +=8;
1563 }
1564 break;
1565
1566 case BGPTYPE_ATTR_SET:
1567 TCHECK2(tptr[0], 4);
1568 printf("\n\t Origin AS: %u", EXTRACT_32BITS(tptr));
1569 tptr+=4;
1570 len -=4;
1571
1572 while (len >= 2 ) {
1573 int alen;
1574 struct bgp_attr bgpa;
1575
1576 TCHECK2(tptr[0], sizeof(bgpa));
1577 memcpy(&bgpa, tptr, sizeof(bgpa));
1578 alen = bgp_attr_len(&bgpa);
1579 tptr += bgp_attr_off(&bgpa);
1580 len -= bgp_attr_off(&bgpa);
1581
1582 printf("\n\t %s (%u), length: %u",
1583 tok2strbuf(bgp_attr_values,
1584 "Unknown Attribute", bgpa.bgpa_type,
1585 tokbuf, sizeof(tokbuf)),
1586 bgpa.bgpa_type,
1587 alen);
1588
1589 if (bgpa.bgpa_flags) {
1590 printf(", Flags [%s%s%s%s",
1591 bgpa.bgpa_flags & 0x80 ? "O" : "",
1592 bgpa.bgpa_flags & 0x40 ? "T" : "",
1593 bgpa.bgpa_flags & 0x20 ? "P" : "",
1594 bgpa.bgpa_flags & 0x10 ? "E" : "");
1595 if (bgpa.bgpa_flags & 0xf)
1596 printf("+%x", bgpa.bgpa_flags & 0xf);
1597 printf("]: ");
1598 }
1599 /* FIXME check for recursion */
1600 if (!bgp_attr_print(&bgpa, tptr, alen))
1601 return 0;
1602 tptr += alen;
1603 len -= alen;
1604 }
1605 break;
1606
1607
1608 default:
1609 TCHECK2(*pptr,len);
1610 printf("\n\t no Attribute %u decoder",attr->bgpa_type); /* we have no decoder for the attribute */
1611 if (vflag <= 1)
1612 print_unknown_data(pptr,"\n\t ",len);
1613 break;
1614 }
1615 if (vflag > 1 && len) { /* omit zero length attributes*/
1616 TCHECK2(*pptr,len);
1617 print_unknown_data(pptr,"\n\t ",len);
1618 }
1619 return 1;
1620
1621 trunc:
1622 return 0;
1623 }
1624
1625 static void
1626 bgp_open_print(const u_char *dat, int length)
1627 {
1628 struct bgp_open bgpo;
1629 struct bgp_opt bgpopt;
1630 const u_char *opt;
1631 int i,cap_type,cap_len,tcap_len,cap_offset;
1632 char tokbuf[TOKBUFSIZE];
1633 char tokbuf2[TOKBUFSIZE];
1634
1635 TCHECK2(dat[0], BGP_OPEN_SIZE);
1636 memcpy(&bgpo, dat, BGP_OPEN_SIZE);
1637
1638 printf("\n\t Version %d, ", bgpo.bgpo_version);
1639 printf("my AS %u, ", ntohs(bgpo.bgpo_myas));
1640 printf("Holdtime %us, ", ntohs(bgpo.bgpo_holdtime));
1641 printf("ID %s", getname((u_char *)&bgpo.bgpo_id));
1642 printf("\n\t Optional parameters, length: %u", bgpo.bgpo_optlen);
1643
1644 /* some little sanity checking */
1645 if (length < bgpo.bgpo_optlen+BGP_OPEN_SIZE)
1646 return;
1647
1648 /* ugly! */
1649 opt = &((const struct bgp_open *)dat)->bgpo_optlen;
1650 opt++;
1651
1652 i = 0;
1653 while (i < bgpo.bgpo_optlen) {
1654 TCHECK2(opt[i], BGP_OPT_SIZE);
1655 memcpy(&bgpopt, &opt[i], BGP_OPT_SIZE);
1656 if (i + 2 + bgpopt.bgpopt_len > bgpo.bgpo_optlen) {
1657 printf("\n\t Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len);
1658 break;
1659 }
1660
1661 printf("\n\t Option %s (%u), length: %u",
1662 tok2strbuf(bgp_opt_values,"Unknown",
1663 bgpopt.bgpopt_type,
1664 tokbuf, sizeof(tokbuf)),
1665 bgpopt.bgpopt_type,
1666 bgpopt.bgpopt_len);
1667
1668 /* now lets decode the options we know*/
1669 switch(bgpopt.bgpopt_type) {
1670 case BGP_OPT_CAP:
1671 cap_type=opt[i+BGP_OPT_SIZE];
1672 cap_len=opt[i+BGP_OPT_SIZE+1];
1673 tcap_len=cap_len;
1674 printf("\n\t %s (%u), length: %u",
1675 tok2strbuf(bgp_capcode_values, "Unknown",
1676 cap_type, tokbuf, sizeof(tokbuf)),
1677 cap_type,
1678 cap_len);
1679 switch(cap_type) {
1680 case BGP_CAPCODE_MP:
1681 printf("\n\t\tAFI %s (%u), SAFI %s (%u)",
1682 tok2strbuf(bgp_afi_values, "Unknown",
1683 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1684 tokbuf, sizeof(tokbuf)),
1685 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1686 tok2strbuf(bgp_safi_values, "Unknown",
1687 opt[i+BGP_OPT_SIZE+5],
1688 tokbuf, sizeof(tokbuf)),
1689 opt[i+BGP_OPT_SIZE+5]);
1690 break;
1691 case BGP_CAPCODE_RESTART:
1692 printf("\n\t\tRestart Flags: [%s], Restart Time %us",
1693 ((opt[i+BGP_OPT_SIZE+2])&0x80) ? "R" : "none",
1694 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2)&0xfff);
1695 tcap_len-=2;
1696 cap_offset=4;
1697 while(tcap_len>=4) {
1698 printf("\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s",
1699 tok2strbuf(bgp_afi_values,"Unknown",
1700 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1701 tokbuf, sizeof(tokbuf)),
1702 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1703 tok2strbuf(bgp_safi_values,"Unknown",
1704 opt[i+BGP_OPT_SIZE+cap_offset+2],
1705 tokbuf2, sizeof(tokbuf2)),
1706 opt[i+BGP_OPT_SIZE+cap_offset+2],
1707 ((opt[i+BGP_OPT_SIZE+cap_offset+3])&0x80) ? "yes" : "no" );
1708 tcap_len-=4;
1709 cap_offset+=4;
1710 }
1711 break;
1712 case BGP_CAPCODE_RR:
1713 case BGP_CAPCODE_RR_CISCO:
1714 break;
1715 default:
1716 TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
1717 printf("\n\t\tno decoder for Capability %u",
1718 cap_type);
1719 if (vflag <= 1)
1720 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
1721 break;
1722 }
1723 if (vflag > 1) {
1724 TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
1725 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
1726 }
1727 break;
1728 case BGP_OPT_AUTH:
1729 default:
1730 printf("\n\t no decoder for option %u",
1731 bgpopt.bgpopt_type);
1732 break;
1733 }
1734
1735 i += BGP_OPT_SIZE + bgpopt.bgpopt_len;
1736 }
1737 return;
1738 trunc:
1739 printf("[|BGP]");
1740 }
1741
1742 static void
1743 bgp_update_print(const u_char *dat, int length)
1744 {
1745 struct bgp bgp;
1746 struct bgp_attr bgpa;
1747 const u_char *p;
1748 int len;
1749 int i;
1750 char tokbuf[TOKBUFSIZE];
1751
1752 TCHECK2(dat[0], BGP_SIZE);
1753 memcpy(&bgp, dat, BGP_SIZE);
1754 p = dat + BGP_SIZE; /*XXX*/
1755
1756 /* Unfeasible routes */
1757 len = EXTRACT_16BITS(p);
1758 if (len) {
1759 /*
1760 * Without keeping state from the original NLRI message,
1761 * it's not possible to tell if this a v4 or v6 route,
1762 * so only try to decode it if we're not v6 enabled.
1763 */
1764 #ifdef INET6
1765 printf("\n\t Withdrawn routes: %d bytes", len);
1766 #else
1767 char buf[MAXHOSTNAMELEN + 100];
1768 int wpfx;
1769
1770 TCHECK2(p[2], len);
1771 i = 2;
1772
1773 printf("\n\t Withdrawn routes:");
1774
1775 while(i < 2 + len) {
1776 wpfx = decode_prefix4(&p[i], buf, sizeof(buf));
1777 if (wpfx == -1) {
1778 printf("\n\t (illegal prefix length)");
1779 break;
1780 } else if (wpfx == -2)
1781 goto trunc;
1782 else {
1783 i += wpfx;
1784 printf("\n\t %s", buf);
1785 }
1786 }
1787 #endif
1788 }
1789 p += 2 + len;
1790
1791 TCHECK2(p[0], 2);
1792 len = EXTRACT_16BITS(p);
1793
1794 if (len == 0 && length == BGP_UPDATE_MINSIZE) {
1795 printf("\n\t End-of-Rib Marker (empty NLRI)");
1796 return;
1797 }
1798
1799 if (len) {
1800 /* do something more useful!*/
1801 i = 2;
1802 while (i < 2 + len) {
1803 int alen, aoff;
1804
1805 TCHECK2(p[i], sizeof(bgpa));
1806 memcpy(&bgpa, &p[i], sizeof(bgpa));
1807 alen = bgp_attr_len(&bgpa);
1808 aoff = bgp_attr_off(&bgpa);
1809
1810 printf("\n\t %s (%u), length: %u",
1811 tok2strbuf(bgp_attr_values, "Unknown Attribute",
1812 bgpa.bgpa_type,
1813 tokbuf, sizeof(tokbuf)),
1814 bgpa.bgpa_type,
1815 alen);
1816
1817 if (bgpa.bgpa_flags) {
1818 printf(", Flags [%s%s%s%s",
1819 bgpa.bgpa_flags & 0x80 ? "O" : "",
1820 bgpa.bgpa_flags & 0x40 ? "T" : "",
1821 bgpa.bgpa_flags & 0x20 ? "P" : "",
1822 bgpa.bgpa_flags & 0x10 ? "E" : "");
1823 if (bgpa.bgpa_flags & 0xf)
1824 printf("+%x", bgpa.bgpa_flags & 0xf);
1825 printf("]: ");
1826 }
1827 if (!bgp_attr_print(&bgpa, &p[i + aoff], alen))
1828 goto trunc;
1829 i += aoff + alen;
1830 }
1831 }
1832 p += 2 + len;
1833
1834 if (dat + length > p) {
1835 printf("\n\t Updated routes:");
1836 while (dat + length > p) {
1837 char buf[MAXHOSTNAMELEN + 100];
1838 i = decode_prefix4(p, buf, sizeof(buf));
1839 if (i == -1) {
1840 printf("\n\t (illegal prefix length)");
1841 break;
1842 } else if (i == -2)
1843 goto trunc;
1844 else {
1845 printf("\n\t %s", buf);
1846 p += i;
1847 }
1848 }
1849 }
1850 return;
1851 trunc:
1852 printf("[|BGP]");
1853 }
1854
1855 static void
1856 bgp_notification_print(const u_char *dat, int length)
1857 {
1858 struct bgp_notification bgpn;
1859 const u_char *tptr;
1860 char tokbuf[TOKBUFSIZE];
1861 char tokbuf2[TOKBUFSIZE];
1862
1863 TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
1864 memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
1865
1866 /* some little sanity checking */
1867 if (length<BGP_NOTIFICATION_SIZE)
1868 return;
1869
1870 printf(", %s (%u)",
1871 tok2strbuf(bgp_notify_major_values, "Unknown Error",
1872 bgpn.bgpn_major, tokbuf, sizeof(tokbuf)),
1873 bgpn.bgpn_major);
1874
1875 switch (bgpn.bgpn_major) {
1876
1877 case BGP_NOTIFY_MAJOR_MSG:
1878 printf(", subcode %s (%u)",
1879 tok2strbuf(bgp_notify_minor_msg_values, "Unknown",
1880 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1881 bgpn.bgpn_minor);
1882 break;
1883 case BGP_NOTIFY_MAJOR_OPEN:
1884 printf(", subcode %s (%u)",
1885 tok2strbuf(bgp_notify_minor_open_values, "Unknown",
1886 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1887 bgpn.bgpn_minor);
1888 break;
1889 case BGP_NOTIFY_MAJOR_UPDATE:
1890 printf(", subcode %s (%u)",
1891 tok2strbuf(bgp_notify_minor_update_values, "Unknown",
1892 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1893 bgpn.bgpn_minor);
1894 break;
1895 case BGP_NOTIFY_MAJOR_CAP:
1896 printf(" subcode %s (%u)",
1897 tok2strbuf(bgp_notify_minor_cap_values, "Unknown",
1898 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1899 bgpn.bgpn_minor);
1900 case BGP_NOTIFY_MAJOR_CEASE:
1901 printf(", subcode %s (%u)",
1902 tok2strbuf(bgp_notify_minor_cease_values, "Unknown",
1903 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1904 bgpn.bgpn_minor);
1905
1906 /* draft-ietf-idr-cease-subcode-02 mentions optionally 7 bytes
1907 * for the maxprefix subtype, which may contain AFI, SAFI and MAXPREFIXES
1908 */
1909 if(bgpn.bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= BGP_NOTIFICATION_SIZE + 7) {
1910 tptr = dat + BGP_NOTIFICATION_SIZE;
1911 TCHECK2(*tptr, 7);
1912 printf(", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
1913 tok2strbuf(bgp_afi_values, "Unknown",
1914 EXTRACT_16BITS(tptr), tokbuf, sizeof(tokbuf)),
1915 EXTRACT_16BITS(tptr),
1916 tok2strbuf(bgp_safi_values, "Unknown", *(tptr+2),
1917 tokbuf2, sizeof(tokbuf)),
1918 *(tptr+2),
1919 EXTRACT_32BITS(tptr+3));
1920 }
1921 break;
1922 default:
1923 break;
1924 }
1925
1926 return;
1927 trunc:
1928 printf("[|BGP]");
1929 }
1930
1931 static void
1932 bgp_route_refresh_print(const u_char *pptr, int len) {
1933
1934 const struct bgp_route_refresh *bgp_route_refresh_header;
1935 char tokbuf[TOKBUFSIZE];
1936 char tokbuf2[TOKBUFSIZE];
1937
1938 TCHECK2(pptr[0], BGP_ROUTE_REFRESH_SIZE);
1939
1940 /* some little sanity checking */
1941 if (len<BGP_ROUTE_REFRESH_SIZE)
1942 return;
1943
1944 bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
1945
1946 printf("\n\t AFI %s (%u), SAFI %s (%u)",
1947 tok2strbuf(bgp_afi_values,"Unknown",
1948 /* this stinks but the compiler pads the structure
1949 * weird */
1950 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
1951 tokbuf, sizeof(tokbuf)),
1952 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
1953 tok2strbuf(bgp_safi_values,"Unknown",
1954 bgp_route_refresh_header->safi,
1955 tokbuf2, sizeof(tokbuf2)),
1956 bgp_route_refresh_header->safi);
1957
1958 if (vflag > 1) {
1959 TCHECK2(*pptr, len);
1960 print_unknown_data(pptr,"\n\t ", len);
1961 }
1962
1963 return;
1964 trunc:
1965 printf("[|BGP]");
1966 }
1967
1968 static int
1969 bgp_header_print(const u_char *dat, int length)
1970 {
1971 struct bgp bgp;
1972 char tokbuf[TOKBUFSIZE];
1973
1974 TCHECK2(dat[0], BGP_SIZE);
1975 memcpy(&bgp, dat, BGP_SIZE);
1976 printf("\n\t%s Message (%u), length: %u",
1977 tok2strbuf(bgp_msg_values, "Unknown", bgp.bgp_type,
1978 tokbuf, sizeof(tokbuf)),
1979 bgp.bgp_type,
1980 length);
1981
1982 switch (bgp.bgp_type) {
1983 case BGP_OPEN:
1984 bgp_open_print(dat, length);
1985 break;
1986 case BGP_UPDATE:
1987 bgp_update_print(dat, length);
1988 break;
1989 case BGP_NOTIFICATION:
1990 bgp_notification_print(dat, length);
1991 break;
1992 case BGP_KEEPALIVE:
1993 break;
1994 case BGP_ROUTE_REFRESH:
1995 bgp_route_refresh_print(dat, length);
1996 break;
1997 default:
1998 /* we have no decoder for the BGP message */
1999 TCHECK2(*dat, length);
2000 printf("\n\t no Message %u decoder",bgp.bgp_type);
2001 print_unknown_data(dat,"\n\t ",length);
2002 break;
2003 }
2004 return 1;
2005 trunc:
2006 printf("[|BGP]");
2007 return 0;
2008 }
2009
2010 void
2011 bgp_print(const u_char *dat, int length)
2012 {
2013 const u_char *p;
2014 const u_char *ep;
2015 const u_char *start;
2016 const u_char marker[] = {
2017 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
2018 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
2019 };
2020 struct bgp bgp;
2021 u_int16_t hlen;
2022 char tokbuf[TOKBUFSIZE];
2023
2024 ep = dat + length;
2025 if (snapend < dat + length)
2026 ep = snapend;
2027
2028 printf(": BGP, length: %u",length);
2029
2030 if (vflag < 1) /* lets be less chatty */
2031 return;
2032
2033 p = dat;
2034 start = p;
2035 while (p < ep) {
2036 if (!TTEST2(p[0], 1))
2037 break;
2038 if (p[0] != 0xff) {
2039 p++;
2040 continue;
2041 }
2042
2043 if (!TTEST2(p[0], sizeof(marker)))
2044 break;
2045 if (memcmp(p, marker, sizeof(marker)) != 0) {
2046 p++;
2047 continue;
2048 }
2049
2050 /* found BGP header */
2051 TCHECK2(p[0], BGP_SIZE); /*XXX*/
2052 memcpy(&bgp, p, BGP_SIZE);
2053
2054 if (start != p)
2055 printf(" [|BGP]");
2056
2057 hlen = ntohs(bgp.bgp_len);
2058 if (hlen < BGP_SIZE) {
2059 printf("\n[|BGP Bogus header length %u < %u]", hlen,
2060 BGP_SIZE);
2061 break;
2062 }
2063
2064 if (TTEST2(p[0], hlen)) {
2065 if (!bgp_header_print(p, hlen))
2066 return;
2067 p += hlen;
2068 start = p;
2069 } else {
2070 printf("\n[|BGP %s]",
2071 tok2strbuf(bgp_msg_values,
2072 "Unknown Message Type",
2073 bgp.bgp_type,
2074 tokbuf, sizeof(tokbuf)));
2075 break;
2076 }
2077 }
2078
2079 return;
2080
2081 trunc:
2082 printf(" [|BGP]");
2083 }
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