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gerrit-public.fairphone.software / fp2-dev / platform / external / tcpdump / 520d66ec4145f22ecfd34581ddd52578bd39a964 / . / print-bgp.c
blob: 34aa7985eca8dbe08438380ae69afede099e4b5c [file] [log] [blame]
The Android Open Source Project2949f582009-03-03 19:30:46 -0800[diff] [blame]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
38static const char rcsid[] _U_ =
39 "@(#) $Header: /tcpdump/master/tcpdump/print-bgp.c,v 1.91.2.12 2007/07/14 22:26:35 guy Exp $";
40#endif
41
42#include <tcpdump-stdinc.h>
43
44#include <stdio.h>
45#include <string.h>
46
47#include "interface.h"
48#include "decode_prefix.h"
49#include "addrtoname.h"
50#include "extract.h"
51#include "bgp.h"
52#include "l2vpn.h"
53#include "af.h"
54
55struct 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
68static 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
77struct 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
90struct 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
99struct 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
108struct 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
118struct 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
152static 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
179static 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
187static 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
199static 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
213static 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
232static 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
245static 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
256static 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
263static 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
273static 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
288static 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
296static 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
322static 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
375static struct tok bgp_extd_comm_flag_values[] = {
376 { 0x8000, "vendor-specific"},
377 { 0x4000, "non-transitive"},
378 { 0, NULL},
379};
380
381static 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
417static 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
427int
428decode_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
448trunc:
449 return -2;
450}
451
452static int
453decode_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
493trunc:
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 */
500char *
501bgp_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
537static int
538decode_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
570trunc:
571 return -2;
572}
573
574static int
575decode_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
608trunc:
609 return -2;
610}
611
612/*
613 * As I remember, some versions of systems have an snprintf() that
614 * returns -1 if the buffer would have overflowed. If the return
615 * value is negative, set buflen to 0, to indicate that we've filled
616 * the buffer up.
617 *
618 * If the return value is greater than buflen, that means that
619 * the buffer would have overflowed; again, set buflen to 0 in
620 * that case.
621 */
622#define UPDATE_BUF_BUFLEN(buf, buflen, strlen) \
623 if (strlen<0) \
624 buflen=0; \
625 else if ((u_int)strlen>buflen) \
626 buflen=0; \
627 else { \
628 buflen-=strlen; \
629 buf+=strlen; \
630 }
631
632static int
633decode_labeled_vpn_l2(const u_char *pptr, char *buf, u_int buflen)
634{
635 int plen,tlen,strlen,tlv_type,tlv_len,ttlv_len;
636
637 TCHECK2(pptr[0], 2);
638 plen=EXTRACT_16BITS(pptr);
639 tlen=plen;
640 pptr+=2;
641 TCHECK2(pptr[0],15);
642 buf[0]='\0';
643 strlen=snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u",
644 bgp_vpn_rd_print(pptr),
645 EXTRACT_16BITS(pptr+8),
646 EXTRACT_16BITS(pptr+10),
647 EXTRACT_24BITS(pptr+12)>>4); /* the label is offsetted by 4 bits so lets shift it right */
648 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
649 pptr+=15;
650 tlen-=15;
651
652 /* ok now the variable part - lets read out TLVs*/
653 while (tlen>0) {
654 if (tlen < 3)
655 return -1;
656 TCHECK2(pptr[0], 3);
657 tlv_type=*pptr++;
658 tlv_len=EXTRACT_16BITS(pptr);
659 ttlv_len=tlv_len;
660 pptr+=2;
661
662 switch(tlv_type) {
663 case 1:
664 if (buflen!=0) {
665 strlen=snprintf(buf,buflen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
666 tlv_type,
667 tlv_len);
668 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
669 }
670 ttlv_len=ttlv_len/8+1; /* how many bytes do we need to read ? */
671 while (ttlv_len>0) {
672 TCHECK(pptr[0]);
673 if (buflen!=0) {
674 strlen=snprintf(buf,buflen, "%02x",*pptr++);
675 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
676 }
677 ttlv_len--;
678 }
679 break;
680 default:
681 if (buflen!=0) {
682 strlen=snprintf(buf,buflen, "\n\t\tunknown TLV #%u, length: %u",
683 tlv_type,
684 tlv_len);
685 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
686 }
687 break;
688 }
689 tlen-=(tlv_len<<3); /* the tlv-length is expressed in bits so lets shift it right */
690 }
691 return plen+2;
692
693trunc:
694 return -2;
695}
696
697#ifdef INET6
698int
699decode_prefix6(const u_char *pd, char *buf, u_int buflen)
700{
701 struct in6_addr addr;
702 u_int plen;
703
704 TCHECK(pd[0]);
705 plen = pd[0];
706 if (128 < plen)
707 return -1;
708
709 memset(&addr, 0, sizeof(addr));
710 TCHECK2(pd[1], (plen + 7) / 8);
711 memcpy(&addr, &pd[1], (plen + 7) / 8);
712 if (plen % 8) {
713 addr.s6_addr[(plen + 7) / 8 - 1] &=
714 ((0xff00 >> (plen % 8)) & 0xff);
715 }
716 snprintf(buf, buflen, "%s/%d", getname6((u_char *)&addr), plen);
717 return 1 + (plen + 7) / 8;
718
719trunc:
720 return -2;
721}
722
723static int
724decode_labeled_prefix6(const u_char *pptr, char *buf, u_int buflen)
725{
726 struct in6_addr addr;
727 u_int plen;
728
729 TCHECK(pptr[0]);
730 plen = pptr[0]; /* get prefix length */
731
732 if (24 > plen)
733 return -1;
734
735 plen-=24; /* adjust prefixlen - labellength */
736
737 if (128 < plen)
738 return -1;
739
740 memset(&addr, 0, sizeof(addr));
741 TCHECK2(pptr[4], (plen + 7) / 8);
742 memcpy(&addr, &pptr[4], (plen + 7) / 8);
743 if (plen % 8) {
744 addr.s6_addr[(plen + 7) / 8 - 1] &=
745 ((0xff00 >> (plen % 8)) & 0xff);
746 }
747 /* the label may get offsetted by 4 bits so lets shift it right */
748 snprintf(buf, buflen, "%s/%d, label:%u %s",
749 getname6((u_char *)&addr),
750 plen,
751 EXTRACT_24BITS(pptr+1)>>4,
752 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
753
754 return 4 + (plen + 7) / 8;
755
756trunc:
757 return -2;
758}
759
760static int
761decode_labeled_vpn_prefix6(const u_char *pptr, char *buf, u_int buflen)
762{
763 struct in6_addr addr;
764 u_int plen;
765
766 TCHECK(pptr[0]);
767 plen = pptr[0]; /* get prefix length */
768
769 if ((24+64) > plen)
770 return -1;
771
772 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
773
774 if (128 < plen)
775 return -1;
776
777 memset(&addr, 0, sizeof(addr));
778 TCHECK2(pptr[12], (plen + 7) / 8);
779 memcpy(&addr, &pptr[12], (plen + 7) / 8);
780 if (plen % 8) {
781 addr.s6_addr[(plen + 7) / 8 - 1] &=
782 ((0xff00 >> (plen % 8)) & 0xff);
783 }
784 /* the label may get offsetted by 4 bits so lets shift it right */
785 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
786 bgp_vpn_rd_print(pptr+4),
787 getname6((u_char *)&addr),
788 plen,
789 EXTRACT_24BITS(pptr+1)>>4,
790 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
791
792 return 12 + (plen + 7) / 8;
793
794trunc:
795 return -2;
796}
797#endif
798
799static int
800decode_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
801{
802 u_int8_t addr[19];
803 u_int plen;
804
805 TCHECK(pptr[0]);
806 plen = pptr[0]; /* get prefix length */
807
808 if (152 < plen)
809 return -1;
810
811 memset(&addr, 0, sizeof(addr));
812 TCHECK2(pptr[4], (plen + 7) / 8);
813 memcpy(&addr, &pptr[4], (plen + 7) / 8);
814 if (plen % 8) {
815 addr[(plen + 7) / 8 - 1] &=
816 ((0xff00 >> (plen % 8)) & 0xff);
817 }
818 snprintf(buf, buflen, "%s/%d",
819 isonsap_string(addr,(plen + 7) / 8),
820 plen);
821
822 return 1 + (plen + 7) / 8;
823
824trunc:
825 return -2;
826}
827
828static int
829decode_labeled_vpn_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
830{
831 u_int8_t addr[19];
832 u_int plen;
833
834 TCHECK(pptr[0]);
835 plen = pptr[0]; /* get prefix length */
836
837 if ((24+64) > plen)
838 return -1;
839
840 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
841
842 if (152 < plen)
843 return -1;
844
845 memset(&addr, 0, sizeof(addr));
846 TCHECK2(pptr[12], (plen + 7) / 8);
847 memcpy(&addr, &pptr[12], (plen + 7) / 8);
848 if (plen % 8) {
849 addr[(plen + 7) / 8 - 1] &=
850 ((0xff00 >> (plen % 8)) & 0xff);
851 }
852 /* the label may get offsetted by 4 bits so lets shift it right */
853 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
854 bgp_vpn_rd_print(pptr+4),
855 isonsap_string(addr,(plen + 7) / 8),
856 plen,
857 EXTRACT_24BITS(pptr+1)>>4,
858 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
859
860 return 12 + (plen + 7) / 8;
861
862trunc:
863 return -2;
864}
865
866static int
867bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len)
868{
869 int i;
870 u_int16_t af;
871 u_int8_t safi, snpa, nhlen;
872 union { /* copy buffer for bandwidth values */
873 float f;
874 u_int32_t i;
875 } bw;
876 int advance;
877 int tlen;
878 const u_char *tptr;
879 char buf[MAXHOSTNAMELEN + 100];
880 char tokbuf[TOKBUFSIZE];
881
882 tptr = pptr;
883 tlen=len;
884
885 switch (attr->bgpa_type) {
886 case BGPTYPE_ORIGIN:
887 if (len != 1)
888 printf("invalid len");
889 else {
890 TCHECK(*tptr);
891 printf("%s", tok2strbuf(bgp_origin_values,
892 "Unknown Origin Typecode",
893 tptr[0],
894 tokbuf, sizeof(tokbuf)));
895 }
896 break;
897
898 case BGPTYPE_AS_PATH:
899 if (len % 2) {
900 printf("invalid len");
901 break;
902 }
903 if (!len) {
904 printf("empty");
905 break;
906 }
907
908 while (tptr < pptr + len) {
909 TCHECK(tptr[0]);
910 printf("%s", tok2strbuf(bgp_as_path_segment_open_values,
911 "?", tptr[0],
912 tokbuf, sizeof(tokbuf)));
913 for (i = 0; i < tptr[1] * 2; i += 2) {
914 TCHECK2(tptr[2 + i], 2);
915 printf("%u ", EXTRACT_16BITS(&tptr[2 + i]));
916 }
917 TCHECK(tptr[0]);
918 printf("%s", tok2strbuf(bgp_as_path_segment_close_values,
919 "?", tptr[0],
920 tokbuf, sizeof(tokbuf)));
921 TCHECK(tptr[1]);
922 tptr += 2 + tptr[1] * 2;
923 }
924 break;
925 case BGPTYPE_NEXT_HOP:
926 if (len != 4)
927 printf("invalid len");
928 else {
929 TCHECK2(tptr[0], 4);
930 printf("%s", getname(tptr));
931 }
932 break;
933 case BGPTYPE_MULTI_EXIT_DISC:
934 case BGPTYPE_LOCAL_PREF:
935 if (len != 4)
936 printf("invalid len");
937 else {
938 TCHECK2(tptr[0], 4);
939 printf("%u", EXTRACT_32BITS(tptr));
940 }
941 break;
942 case BGPTYPE_ATOMIC_AGGREGATE:
943 if (len != 0)
944 printf("invalid len");
945 break;
946 case BGPTYPE_AGGREGATOR:
947 if (len != 6) {
948 printf("invalid len");
949 break;
950 }
951 TCHECK2(tptr[0], 6);
952 printf(" AS #%u, origin %s", EXTRACT_16BITS(tptr),
953 getname(tptr + 2));
954 break;
955 case BGPTYPE_COMMUNITIES:
956 if (len % 4) {
957 printf("invalid len");
958 break;
959 }
960 while (tlen>0) {
961 u_int32_t comm;
962 TCHECK2(tptr[0], 4);
963 comm = EXTRACT_32BITS(tptr);
964 switch (comm) {
965 case BGP_COMMUNITY_NO_EXPORT:
966 printf(" NO_EXPORT");
967 break;
968 case BGP_COMMUNITY_NO_ADVERT:
969 printf(" NO_ADVERTISE");
970 break;
971 case BGP_COMMUNITY_NO_EXPORT_SUBCONFED:
972 printf(" NO_EXPORT_SUBCONFED");
973 break;
974 default:
975 printf("%u:%u%s",
976 (comm >> 16) & 0xffff,
977 comm & 0xffff,
978 (tlen>4) ? ", " : "");
979 break;
980 }
981 tlen -=4;
982 tptr +=4;
983 }
984 break;
985 case BGPTYPE_ORIGINATOR_ID:
986 if (len != 4) {
987 printf("invalid len");
988 break;
989 }
990 TCHECK2(tptr[0], 4);
991 printf("%s",getname(tptr));
992 break;
993 case BGPTYPE_CLUSTER_LIST:
994 if (len % 4) {
995 printf("invalid len");
996 break;
997 }
998 while (tlen>0) {
999 TCHECK2(tptr[0], 4);
1000 printf("%s%s",
1001 getname(tptr),
1002 (tlen>4) ? ", " : "");
1003 tlen -=4;
1004 tptr +=4;
1005 }
1006 break;
1007 case BGPTYPE_MP_REACH_NLRI:
1008 TCHECK2(tptr[0], 3);
1009 af = EXTRACT_16BITS(tptr);
1010 safi = tptr[2];
1011
1012 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1013 tok2strbuf(af_values, "Unknown AFI", af,
1014 tokbuf, sizeof(tokbuf)),
1015 af,
1016 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1017 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1018 tokbuf, sizeof(tokbuf)),
1019 safi);
1020
1021 switch(af<<8 | safi) {
1022 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1023 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1024 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1025 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1026 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1027 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1028 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1029 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1030#ifdef INET6
1031 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1032 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1033 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1034 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1035 case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1036 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1037 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1038 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1039#endif
1040 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1041 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1042 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1043 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1044 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1045 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1046 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1047 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1048 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1049 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1050 break;
1051 default:
1052 TCHECK2(tptr[0], tlen);
1053 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1054 if (vflag <= 1)
1055 print_unknown_data(tptr,"\n\t ",tlen);
1056 goto done;
1057 break;
1058 }
1059
1060 tptr +=3;
1061
1062 TCHECK(tptr[0]);
1063 nhlen = tptr[0];
1064 tlen = nhlen;
1065 tptr++;
1066
1067 if (tlen) {
1068 printf("\n\t nexthop: ");
1069 while (tlen > 0) {
1070 switch(af<<8 | safi) {
1071 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1072 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1073 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1074 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1075 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1076 if (tlen < (int)sizeof(struct in_addr)) {
1077 printf("invalid len");
1078 tlen = 0;
1079 } else {
1080 TCHECK2(tptr[0], sizeof(struct in_addr));
1081 printf("%s",getname(tptr));
1082 tlen -= sizeof(struct in_addr);
1083 tptr += sizeof(struct in_addr);
1084 }
1085 break;
1086 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1087 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1088 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1089 if (tlen < (int)(sizeof(struct in_addr)+BGP_VPN_RD_LEN)) {
1090 printf("invalid len");
1091 tlen = 0;
1092 } else {
1093 TCHECK2(tptr[0], sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1094 printf("RD: %s, %s",
1095 bgp_vpn_rd_print(tptr),
1096 getname(tptr+BGP_VPN_RD_LEN));
1097 tlen -= (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1098 tptr += (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1099 }
1100 break;
1101#ifdef INET6
1102 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1103 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1104 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1105 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1106 case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1107 if (tlen < (int)sizeof(struct in6_addr)) {
1108 printf("invalid len");
1109 tlen = 0;
1110 } else {
1111 TCHECK2(tptr[0], sizeof(struct in6_addr));
1112 printf("%s", getname6(tptr));
1113 tlen -= sizeof(struct in6_addr);
1114 tptr += sizeof(struct in6_addr);
1115 }
1116 break;
1117 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1118 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1119 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1120 if (tlen < (int)(sizeof(struct in6_addr)+BGP_VPN_RD_LEN)) {
1121 printf("invalid len");
1122 tlen = 0;
1123 } else {
1124 TCHECK2(tptr[0], sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1125 printf("RD: %s, %s",
1126 bgp_vpn_rd_print(tptr),
1127 getname6(tptr+BGP_VPN_RD_LEN));
1128 tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1129 tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1130 }
1131 break;
1132#endif
1133 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1134 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1135 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1136 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1137 if (tlen < (int)sizeof(struct in_addr)) {
1138 printf("invalid len");
1139 tlen = 0;
1140 } else {
1141 TCHECK2(tptr[0], sizeof(struct in_addr));
1142 printf("%s", getname(tptr));
1143 tlen -= (sizeof(struct in_addr));
1144 tptr += (sizeof(struct in_addr));
1145 }
1146 break;
1147 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1148 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1149 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1150 TCHECK2(tptr[0], tlen);
1151 printf("%s",isonsap_string(tptr,tlen));
1152 tptr += tlen;
1153 tlen = 0;
1154 break;
1155
1156 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1157 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1158 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1159 if (tlen < BGP_VPN_RD_LEN+1) {
1160 printf("invalid len");
1161 tlen = 0;
1162 } else {
1163 TCHECK2(tptr[0], tlen);
1164 printf("RD: %s, %s",
1165 bgp_vpn_rd_print(tptr),
1166 isonsap_string(tptr+BGP_VPN_RD_LEN,tlen-BGP_VPN_RD_LEN));
1167 /* rfc986 mapped IPv4 address ? */
1168 if (EXTRACT_32BITS(tptr+BGP_VPN_RD_LEN) == 0x47000601)
1169 printf(" = %s", getname(tptr+BGP_VPN_RD_LEN+4));
1170#ifdef INET6
1171 /* rfc1888 mapped IPv6 address ? */
1172 else if (EXTRACT_24BITS(tptr+BGP_VPN_RD_LEN) == 0x350000)
1173 printf(" = %s", getname6(tptr+BGP_VPN_RD_LEN+3));
1174#endif
1175 tptr += tlen;
1176 tlen = 0;
1177 }
1178 break;
1179 default:
1180 TCHECK2(tptr[0], tlen);
1181 printf("no AFI %u/SAFI %u decoder",af,safi);
1182 if (vflag <= 1)
1183 print_unknown_data(tptr,"\n\t ",tlen);
1184 tptr += tlen;
1185 tlen = 0;
1186 goto done;
1187 break;
1188 }
1189 }
1190 }
1191 printf(", nh-length: %u", nhlen);
1192 tptr += tlen;
1193
1194 TCHECK(tptr[0]);
1195 snpa = tptr[0];
1196 tptr++;
1197
1198 if (snpa) {
1199 printf("\n\t %u SNPA", snpa);
1200 for (/*nothing*/; snpa > 0; snpa--) {
1201 TCHECK(tptr[0]);
1202 printf("\n\t %d bytes", tptr[0]);
1203 tptr += tptr[0] + 1;
1204 }
1205 } else {
1206 printf(", no SNPA");
1207 }
1208
1209 while (len - (tptr - pptr) > 0) {
1210 switch (af<<8 | safi) {
1211 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1212 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1213 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1214 advance = decode_prefix4(tptr, buf, sizeof(buf));
1215 if (advance == -1)
1216 printf("\n\t (illegal prefix length)");
1217 else if (advance == -2)
1218 goto trunc;
1219 else
1220 printf("\n\t %s", buf);
1221 break;
1222 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1223 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1224 if (advance == -1)
1225 printf("\n\t (illegal prefix length)");
1226 else if (advance == -2)
1227 goto trunc;
1228 else
1229 printf("\n\t %s", buf);
1230 break;
1231 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1232 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1233 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1234 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1235 if (advance == -1)
1236 printf("\n\t (illegal prefix length)");
1237 else if (advance == -2)
1238 goto trunc;
1239 else
1240 printf("\n\t %s", buf);
1241 break;
1242 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1243 advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1244 if (advance == -1)
1245 printf("\n\t (illegal prefix length)");
1246 else if (advance == -2)
1247 goto trunc;
1248 else
1249 printf("\n\t %s", buf);
1250 break;
1251#ifdef INET6
1252 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1253 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1254 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1255 advance = decode_prefix6(tptr, buf, sizeof(buf));
1256 if (advance == -1)
1257 printf("\n\t (illegal prefix length)");
1258 else if (advance == -2)
1259 goto trunc;
1260 else
1261 printf("\n\t %s", buf);
1262 break;
1263 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1264 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1265 if (advance == -1)
1266 printf("\n\t (illegal prefix length)");
1267 else if (advance == -2)
1268 goto trunc;
1269 else
1270 printf("\n\t %s", buf);
1271 break;
1272 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1273 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1274 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1275 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1276 if (advance == -1)
1277 printf("\n\t (illegal prefix length)");
1278 else if (advance == -2)
1279 goto trunc;
1280 else
1281 printf("\n\t %s", buf);
1282 break;
1283 case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1284 advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1285 if (advance == -1)
1286 printf("\n\t (illegal prefix length)");
1287 else if (advance == -2)
1288 goto trunc;
1289 else
1290 printf("\n\t %s", buf);
1291 break;
1292#endif
1293 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1294 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1295 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1296 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1297 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1298 if (advance == -1)
1299 printf("\n\t (illegal length)");
1300 else if (advance == -2)
1301 goto trunc;
1302 else
1303 printf("\n\t %s", buf);
1304 break;
1305 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1306 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1307 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1308 advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1309 if (advance == -1)
1310 printf("\n\t (illegal prefix length)");
1311 else if (advance == -2)
1312 goto trunc;
1313 else
1314 printf("\n\t %s", buf);
1315 break;
1316 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1317 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1318 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1319 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1320 if (advance == -1)
1321 printf("\n\t (illegal prefix length)");
1322 else if (advance == -2)
1323 goto trunc;
1324 else
1325 printf("\n\t %s", buf);
1326 break;
1327 default:
1328 TCHECK2(*tptr,tlen);
1329 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1330 if (vflag <= 1)
1331 print_unknown_data(tptr,"\n\t ",tlen);
1332 advance = 0;
1333 tptr = pptr + len;
1334 break;
1335 }
1336 if (advance < 0)
1337 break;
1338 tptr += advance;
1339 }
1340 done:
1341 break;
1342
1343 case BGPTYPE_MP_UNREACH_NLRI:
1344 TCHECK2(tptr[0], BGP_MP_NLRI_MINSIZE);
1345 af = EXTRACT_16BITS(tptr);
1346 safi = tptr[2];
1347
1348 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1349 tok2strbuf(af_values, "Unknown AFI", af,
1350 tokbuf, sizeof(tokbuf)),
1351 af,
1352 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1353 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1354 tokbuf, sizeof(tokbuf)),
1355 safi);
1356
1357 if (len == BGP_MP_NLRI_MINSIZE)
1358 printf("\n\t End-of-Rib Marker (empty NLRI)");
1359
1360 tptr += 3;
1361
1362 while (len - (tptr - pptr) > 0) {
1363 switch (af<<8 | safi) {
1364 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1365 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1366 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1367 advance = decode_prefix4(tptr, buf, sizeof(buf));
1368 if (advance == -1)
1369 printf("\n\t (illegal prefix length)");
1370 else if (advance == -2)
1371 goto trunc;
1372 else
1373 printf("\n\t %s", buf);
1374 break;
1375 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1376 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1377 if (advance == -1)
1378 printf("\n\t (illegal prefix length)");
1379 else if (advance == -2)
1380 goto trunc;
1381 else
1382 printf("\n\t %s", buf);
1383 break;
1384 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1385 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1386 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1387 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1388 if (advance == -1)
1389 printf("\n\t (illegal prefix length)");
1390 else if (advance == -2)
1391 goto trunc;
1392 else
1393 printf("\n\t %s", buf);
1394 break;
1395#ifdef INET6
1396 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1397 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1398 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1399 advance = decode_prefix6(tptr, buf, sizeof(buf));
1400 if (advance == -1)
1401 printf("\n\t (illegal prefix length)");
1402 else if (advance == -2)
1403 goto trunc;
1404 else
1405 printf("\n\t %s", buf);
1406 break;
1407 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1408 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1409 if (advance == -1)
1410 printf("\n\t (illegal prefix length)");
1411 else if (advance == -2)
1412 goto trunc;
1413 else
1414 printf("\n\t %s", buf);
1415 break;
1416 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1417 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1418 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1419 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1420 if (advance == -1)
1421 printf("\n\t (illegal prefix length)");
1422 else if (advance == -2)
1423 goto trunc;
1424 else
1425 printf("\n\t %s", buf);
1426 break;
1427#endif
1428 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1429 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1430 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1431 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1432 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1433 if (advance == -1)
1434 printf("\n\t (illegal length)");
1435 else if (advance == -2)
1436 goto trunc;
1437 else
1438 printf("\n\t %s", buf);
1439 break;
1440 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1441 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1442 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1443 advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1444 if (advance == -1)
1445 printf("\n\t (illegal prefix length)");
1446 else if (advance == -2)
1447 goto trunc;
1448 else
1449 printf("\n\t %s", buf);
1450 break;
1451 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1452 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1453 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1454 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1455 if (advance == -1)
1456 printf("\n\t (illegal prefix length)");
1457 else if (advance == -2)
1458 goto trunc;
1459 else
1460 printf("\n\t %s", buf);
1461 break;
1462 default:
1463 TCHECK2(*(tptr-3),tlen);
1464 printf("no AFI %u / SAFI %u decoder",af,safi);
1465 if (vflag <= 1)
1466 print_unknown_data(tptr-3,"\n\t ",tlen);
1467 advance = 0;
1468 tptr = pptr + len;
1469 break;
1470 }
1471 if (advance < 0)
1472 break;
1473 tptr += advance;
1474 }
1475 break;
1476 case BGPTYPE_EXTD_COMMUNITIES:
1477 if (len % 8) {
1478 printf("invalid len");
1479 break;
1480 }
1481 while (tlen>0) {
1482 u_int16_t extd_comm;
1483
1484 TCHECK2(tptr[0], 2);
1485 extd_comm=EXTRACT_16BITS(tptr);
1486
1487 printf("\n\t %s (0x%04x), Flags [%s]",
1488 tok2strbuf(bgp_extd_comm_subtype_values,
1489 "unknown extd community typecode",
1490 extd_comm, tokbuf, sizeof(tokbuf)),
1491 extd_comm,
1492 bittok2str(bgp_extd_comm_flag_values, "none", extd_comm));
1493
1494 TCHECK2(*(tptr+2), 6);
1495 switch(extd_comm) {
1496 case BGP_EXT_COM_RT_0:
1497 case BGP_EXT_COM_RO_0:
1498 printf(": %u:%s",
1499 EXTRACT_16BITS(tptr+2),
1500 getname(tptr+4));
1501 break;
1502 case BGP_EXT_COM_RT_1:
1503 case BGP_EXT_COM_RO_1:
1504 printf(": %s:%u",
1505 getname(tptr+2),
1506 EXTRACT_16BITS(tptr+6));
1507 break;
1508 case BGP_EXT_COM_RT_2:
1509 case BGP_EXT_COM_RO_2:
1510 printf(": %u:%u",
1511 EXTRACT_32BITS(tptr+2),
1512 EXTRACT_16BITS(tptr+6));
1513 break;
1514 case BGP_EXT_COM_LINKBAND:
1515 bw.i = EXTRACT_32BITS(tptr+2);
1516 printf(": bandwidth: %.3f Mbps",
1517 bw.f*8/1000000);
1518 break;
1519 case BGP_EXT_COM_CISCO_MCAST:
1520 printf(": AS %u, group %s",
1521 EXTRACT_16BITS(tptr+2),
1522 getname(tptr+4));
1523 break;
1524 case BGP_EXT_COM_VPN_ORIGIN:
1525 case BGP_EXT_COM_VPN_ORIGIN2:
1526 case BGP_EXT_COM_VPN_ORIGIN3:
1527 case BGP_EXT_COM_VPN_ORIGIN4:
1528 case BGP_EXT_COM_OSPF_RID:
1529 case BGP_EXT_COM_OSPF_RID2:
1530 printf("%s", getname(tptr+2));
1531 break;
1532 case BGP_EXT_COM_OSPF_RTYPE:
1533 case BGP_EXT_COM_OSPF_RTYPE2:
1534 printf(": area:%s, router-type:%s, metric-type:%s%s",
1535 getname(tptr+2),
1536 tok2strbuf(bgp_extd_comm_ospf_rtype_values,
1537 "unknown (0x%02x)",
1538 *(tptr+6),
1539 tokbuf, sizeof(tokbuf)),
1540 (*(tptr+7) & BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "",
1541 ((*(tptr+6) == BGP_OSPF_RTYPE_EXT) || (*(tptr+6) == BGP_OSPF_RTYPE_NSSA)) ? "E1" : "");
1542 break;
1543 case BGP_EXT_COM_L2INFO:
1544 printf(": %s Control Flags [0x%02x]:MTU %u",
1545 tok2strbuf(l2vpn_encaps_values,
1546 "unknown encaps",
1547 *(tptr+2),
1548 tokbuf, sizeof(tokbuf)),
1549 *(tptr+3),
1550 EXTRACT_16BITS(tptr+4));
1551 break;
1552 default:
1553 TCHECK2(*tptr,8);
1554 print_unknown_data(tptr,"\n\t ",8);
1555 break;
1556 }
1557 tlen -=8;
1558 tptr +=8;
1559 }
1560 break;
1561
1562 case BGPTYPE_ATTR_SET:
1563 TCHECK2(tptr[0], 4);
1564 printf("\n\t Origin AS: %u", EXTRACT_32BITS(tptr));
1565 tptr+=4;
1566 len -=4;
1567
1568 while (len >= 2 ) {
1569 int alen;
1570 struct bgp_attr bgpa;
1571
1572 TCHECK2(tptr[0], sizeof(bgpa));
1573 memcpy(&bgpa, tptr, sizeof(bgpa));
1574 alen = bgp_attr_len(&bgpa);
1575 tptr += bgp_attr_off(&bgpa);
1576 len -= bgp_attr_off(&bgpa);
1577
1578 printf("\n\t %s (%u), length: %u",
1579 tok2strbuf(bgp_attr_values,
1580 "Unknown Attribute", bgpa.bgpa_type,
1581 tokbuf, sizeof(tokbuf)),
1582 bgpa.bgpa_type,
1583 alen);
1584
1585 if (bgpa.bgpa_flags) {
1586 printf(", Flags [%s%s%s%s",
1587 bgpa.bgpa_flags & 0x80 ? "O" : "",
1588 bgpa.bgpa_flags & 0x40 ? "T" : "",
1589 bgpa.bgpa_flags & 0x20 ? "P" : "",
1590 bgpa.bgpa_flags & 0x10 ? "E" : "");
1591 if (bgpa.bgpa_flags & 0xf)
1592 printf("+%x", bgpa.bgpa_flags & 0xf);
1593 printf("]: ");
1594 }
1595 /* FIXME check for recursion */
1596 if (!bgp_attr_print(&bgpa, tptr, alen))
1597 return 0;
1598 tptr += alen;
1599 len -= alen;
1600 }
1601 break;
1602
1603
1604 default:
1605 TCHECK2(*pptr,len);
1606 printf("\n\t no Attribute %u decoder",attr->bgpa_type); /* we have no decoder for the attribute */
1607 if (vflag <= 1)
1608 print_unknown_data(pptr,"\n\t ",len);
1609 break;
1610 }
1611 if (vflag > 1 && len) { /* omit zero length attributes*/
1612 TCHECK2(*pptr,len);
1613 print_unknown_data(pptr,"\n\t ",len);
1614 }
1615 return 1;
1616
1617trunc:
1618 return 0;
1619}
1620
1621static void
1622bgp_open_print(const u_char *dat, int length)
1623{
1624 struct bgp_open bgpo;
1625 struct bgp_opt bgpopt;
1626 const u_char *opt;
1627 int i,cap_type,cap_len,tcap_len,cap_offset;
1628 char tokbuf[TOKBUFSIZE];
1629 char tokbuf2[TOKBUFSIZE];
1630
1631 TCHECK2(dat[0], BGP_OPEN_SIZE);
1632 memcpy(&bgpo, dat, BGP_OPEN_SIZE);
1633
1634 printf("\n\t Version %d, ", bgpo.bgpo_version);
1635 printf("my AS %u, ", ntohs(bgpo.bgpo_myas));
1636 printf("Holdtime %us, ", ntohs(bgpo.bgpo_holdtime));
1637 printf("ID %s", getname((u_char *)&bgpo.bgpo_id));
1638 printf("\n\t Optional parameters, length: %u", bgpo.bgpo_optlen);
1639
1640 /* some little sanity checking */
1641 if (length < bgpo.bgpo_optlen+BGP_OPEN_SIZE)
1642 return;
1643
1644 /* ugly! */
1645 opt = &((const struct bgp_open *)dat)->bgpo_optlen;
1646 opt++;
1647
1648 i = 0;
1649 while (i < bgpo.bgpo_optlen) {
1650 TCHECK2(opt[i], BGP_OPT_SIZE);
1651 memcpy(&bgpopt, &opt[i], BGP_OPT_SIZE);
1652 if (i + 2 + bgpopt.bgpopt_len > bgpo.bgpo_optlen) {
1653 printf("\n\t Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len);
1654 break;
1655 }
1656
1657 printf("\n\t Option %s (%u), length: %u",
1658 tok2strbuf(bgp_opt_values,"Unknown",
1659 bgpopt.bgpopt_type,
1660 tokbuf, sizeof(tokbuf)),
1661 bgpopt.bgpopt_type,
1662 bgpopt.bgpopt_len);
1663
1664 /* now lets decode the options we know*/
1665 switch(bgpopt.bgpopt_type) {
1666 case BGP_OPT_CAP:
1667 cap_type=opt[i+BGP_OPT_SIZE];
1668 cap_len=opt[i+BGP_OPT_SIZE+1];
1669 tcap_len=cap_len;
1670 printf("\n\t %s (%u), length: %u",
1671 tok2strbuf(bgp_capcode_values, "Unknown",
1672 cap_type, tokbuf, sizeof(tokbuf)),
1673 cap_type,
1674 cap_len);
1675 switch(cap_type) {
1676 case BGP_CAPCODE_MP:
1677 printf("\n\t\tAFI %s (%u), SAFI %s (%u)",
1678 tok2strbuf(af_values, "Unknown",
1679 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1680 tokbuf, sizeof(tokbuf)),
1681 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1682 tok2strbuf(bgp_safi_values, "Unknown",
1683 opt[i+BGP_OPT_SIZE+5],
1684 tokbuf, sizeof(tokbuf)),
1685 opt[i+BGP_OPT_SIZE+5]);
1686 break;
1687 case BGP_CAPCODE_RESTART:
1688 printf("\n\t\tRestart Flags: [%s], Restart Time %us",
1689 ((opt[i+BGP_OPT_SIZE+2])&0x80) ? "R" : "none",
1690 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2)&0xfff);
1691 tcap_len-=2;
1692 cap_offset=4;
1693 while(tcap_len>=4) {
1694 printf("\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s",
1695 tok2strbuf(af_values,"Unknown",
1696 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1697 tokbuf, sizeof(tokbuf)),
1698 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1699 tok2strbuf(bgp_safi_values,"Unknown",
1700 opt[i+BGP_OPT_SIZE+cap_offset+2],
1701 tokbuf2, sizeof(tokbuf2)),
1702 opt[i+BGP_OPT_SIZE+cap_offset+2],
1703 ((opt[i+BGP_OPT_SIZE+cap_offset+3])&0x80) ? "yes" : "no" );
1704 tcap_len-=4;
1705 cap_offset+=4;
1706 }
1707 break;
1708 case BGP_CAPCODE_RR:
1709 case BGP_CAPCODE_RR_CISCO:
1710 break;
1711 default:
1712 TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
1713 printf("\n\t\tno decoder for Capability %u",
1714 cap_type);
1715 if (vflag <= 1)
1716 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
1717 break;
1718 }
1719 if (vflag > 1) {
1720 TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
1721 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
1722 }
1723 break;
1724 case BGP_OPT_AUTH:
1725 default:
1726 printf("\n\t no decoder for option %u",
1727 bgpopt.bgpopt_type);
1728 break;
1729 }
1730
1731 i += BGP_OPT_SIZE + bgpopt.bgpopt_len;
1732 }
1733 return;
1734trunc:
1735 printf("[|BGP]");
1736}
1737
1738static void
1739bgp_update_print(const u_char *dat, int length)
1740{
1741 struct bgp bgp;
1742 struct bgp_attr bgpa;
1743 const u_char *p;
1744 int len;
1745 int i;
1746 char tokbuf[TOKBUFSIZE];
1747
1748 TCHECK2(dat[0], BGP_SIZE);
1749 memcpy(&bgp, dat, BGP_SIZE);
1750 p = dat + BGP_SIZE; /*XXX*/
1751
1752 /* Unfeasible routes */
1753 len = EXTRACT_16BITS(p);
1754 if (len) {
1755 /*
1756 * Without keeping state from the original NLRI message,
1757 * it's not possible to tell if this a v4 or v6 route,
1758 * so only try to decode it if we're not v6 enabled.
1759 */
1760#ifdef INET6
1761 printf("\n\t Withdrawn routes: %d bytes", len);
1762#else
1763 char buf[MAXHOSTNAMELEN + 100];
1764 int wpfx;
1765
1766 TCHECK2(p[2], len);
1767 i = 2;
1768
1769 printf("\n\t Withdrawn routes:");
1770
1771 while(i < 2 + len) {
1772 wpfx = decode_prefix4(&p[i], buf, sizeof(buf));
1773 if (wpfx == -1) {
1774 printf("\n\t (illegal prefix length)");
1775 break;
1776 } else if (wpfx == -2)
1777 goto trunc;
1778 else {
1779 i += wpfx;
1780 printf("\n\t %s", buf);
1781 }
1782 }
1783#endif
1784 }
1785 p += 2 + len;
1786
1787 TCHECK2(p[0], 2);
1788 len = EXTRACT_16BITS(p);
1789
1790 if (len == 0 && length == BGP_UPDATE_MINSIZE) {
1791 printf("\n\t End-of-Rib Marker (empty NLRI)");
1792 return;
1793 }
1794
1795 if (len) {
1796 /* do something more useful!*/
1797 i = 2;
1798 while (i < 2 + len) {
1799 int alen, aoff;
1800
1801 TCHECK2(p[i], sizeof(bgpa));
1802 memcpy(&bgpa, &p[i], sizeof(bgpa));
1803 alen = bgp_attr_len(&bgpa);
1804 aoff = bgp_attr_off(&bgpa);
1805
1806 printf("\n\t %s (%u), length: %u",
1807 tok2strbuf(bgp_attr_values, "Unknown Attribute",
1808 bgpa.bgpa_type,
1809 tokbuf, sizeof(tokbuf)),
1810 bgpa.bgpa_type,
1811 alen);
1812
1813 if (bgpa.bgpa_flags) {
1814 printf(", Flags [%s%s%s%s",
1815 bgpa.bgpa_flags & 0x80 ? "O" : "",
1816 bgpa.bgpa_flags & 0x40 ? "T" : "",
1817 bgpa.bgpa_flags & 0x20 ? "P" : "",
1818 bgpa.bgpa_flags & 0x10 ? "E" : "");
1819 if (bgpa.bgpa_flags & 0xf)
1820 printf("+%x", bgpa.bgpa_flags & 0xf);
1821 printf("]: ");
1822 }
1823 if (!bgp_attr_print(&bgpa, &p[i + aoff], alen))
1824 goto trunc;
1825 i += aoff + alen;
1826 }
1827 }
1828 p += 2 + len;
1829
1830 if (dat + length > p) {
1831 printf("\n\t Updated routes:");
1832 while (dat + length > p) {
1833 char buf[MAXHOSTNAMELEN + 100];
1834 i = decode_prefix4(p, buf, sizeof(buf));
1835 if (i == -1) {
1836 printf("\n\t (illegal prefix length)");
1837 break;
1838 } else if (i == -2)
1839 goto trunc;
1840 else {
1841 printf("\n\t %s", buf);
1842 p += i;
1843 }
1844 }
1845 }
1846 return;
1847trunc:
1848 printf("[|BGP]");
1849}
1850
1851static void
1852bgp_notification_print(const u_char *dat, int length)
1853{
1854 struct bgp_notification bgpn;
1855 const u_char *tptr;
1856 char tokbuf[TOKBUFSIZE];
1857 char tokbuf2[TOKBUFSIZE];
1858
1859 TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
1860 memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
1861
1862 /* some little sanity checking */
1863 if (length<BGP_NOTIFICATION_SIZE)
1864 return;
1865
1866 printf(", %s (%u)",
1867 tok2strbuf(bgp_notify_major_values, "Unknown Error",
1868 bgpn.bgpn_major, tokbuf, sizeof(tokbuf)),
1869 bgpn.bgpn_major);
1870
1871 switch (bgpn.bgpn_major) {
1872
1873 case BGP_NOTIFY_MAJOR_MSG:
1874 printf(", subcode %s (%u)",
1875 tok2strbuf(bgp_notify_minor_msg_values, "Unknown",
1876 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1877 bgpn.bgpn_minor);
1878 break;
1879 case BGP_NOTIFY_MAJOR_OPEN:
1880 printf(", subcode %s (%u)",
1881 tok2strbuf(bgp_notify_minor_open_values, "Unknown",
1882 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1883 bgpn.bgpn_minor);
1884 break;
1885 case BGP_NOTIFY_MAJOR_UPDATE:
1886 printf(", subcode %s (%u)",
1887 tok2strbuf(bgp_notify_minor_update_values, "Unknown",
1888 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1889 bgpn.bgpn_minor);
1890 break;
1891 case BGP_NOTIFY_MAJOR_CAP:
1892 printf(" subcode %s (%u)",
1893 tok2strbuf(bgp_notify_minor_cap_values, "Unknown",
1894 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1895 bgpn.bgpn_minor);
1896 case BGP_NOTIFY_MAJOR_CEASE:
1897 printf(", subcode %s (%u)",
1898 tok2strbuf(bgp_notify_minor_cease_values, "Unknown",
1899 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1900 bgpn.bgpn_minor);
1901
1902 /* draft-ietf-idr-cease-subcode-02 mentions optionally 7 bytes
1903 * for the maxprefix subtype, which may contain AFI, SAFI and MAXPREFIXES
1904 */
1905 if(bgpn.bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= BGP_NOTIFICATION_SIZE + 7) {
1906 tptr = dat + BGP_NOTIFICATION_SIZE;
1907 TCHECK2(*tptr, 7);
1908 printf(", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
1909 tok2strbuf(af_values, "Unknown",
1910 EXTRACT_16BITS(tptr), tokbuf, sizeof(tokbuf)),
1911 EXTRACT_16BITS(tptr),
1912 tok2strbuf(bgp_safi_values, "Unknown", *(tptr+2),
1913 tokbuf2, sizeof(tokbuf)),
1914 *(tptr+2),
1915 EXTRACT_32BITS(tptr+3));
1916 }
1917 break;
1918 default:
1919 break;
1920 }
1921
1922 return;
1923trunc:
1924 printf("[|BGP]");
1925}
1926
1927static void
1928bgp_route_refresh_print(const u_char *pptr, int len) {
1929
1930 const struct bgp_route_refresh *bgp_route_refresh_header;
1931 char tokbuf[TOKBUFSIZE];
1932 char tokbuf2[TOKBUFSIZE];
1933
1934 TCHECK2(pptr[0], BGP_ROUTE_REFRESH_SIZE);
1935
1936 /* some little sanity checking */
1937 if (len<BGP_ROUTE_REFRESH_SIZE)
1938 return;
1939
1940 bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
1941
1942 printf("\n\t AFI %s (%u), SAFI %s (%u)",
1943 tok2strbuf(af_values,"Unknown",
1944 /* this stinks but the compiler pads the structure
1945 * weird */
1946 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
1947 tokbuf, sizeof(tokbuf)),
1948 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
1949 tok2strbuf(bgp_safi_values,"Unknown",
1950 bgp_route_refresh_header->safi,
1951 tokbuf2, sizeof(tokbuf2)),
1952 bgp_route_refresh_header->safi);
1953
1954 if (vflag > 1) {
1955 TCHECK2(*pptr, len);
1956 print_unknown_data(pptr,"\n\t ", len);
1957 }
1958
1959 return;
1960trunc:
1961 printf("[|BGP]");
1962}
1963
1964static int
1965bgp_header_print(const u_char *dat, int length)
1966{
1967 struct bgp bgp;
1968 char tokbuf[TOKBUFSIZE];
1969
1970 TCHECK2(dat[0], BGP_SIZE);
1971 memcpy(&bgp, dat, BGP_SIZE);
1972 printf("\n\t%s Message (%u), length: %u",
1973 tok2strbuf(bgp_msg_values, "Unknown", bgp.bgp_type,
1974 tokbuf, sizeof(tokbuf)),
1975 bgp.bgp_type,
1976 length);
1977
1978 switch (bgp.bgp_type) {
1979 case BGP_OPEN:
1980 bgp_open_print(dat, length);
1981 break;
1982 case BGP_UPDATE:
1983 bgp_update_print(dat, length);
1984 break;
1985 case BGP_NOTIFICATION:
1986 bgp_notification_print(dat, length);
1987 break;
1988 case BGP_KEEPALIVE:
1989 break;
1990 case BGP_ROUTE_REFRESH:
1991 bgp_route_refresh_print(dat, length);
1992 break;
1993 default:
1994 /* we have no decoder for the BGP message */
1995 TCHECK2(*dat, length);
1996 printf("\n\t no Message %u decoder",bgp.bgp_type);
1997 print_unknown_data(dat,"\n\t ",length);
1998 break;
1999 }
2000 return 1;
2001trunc:
2002 printf("[|BGP]");
2003 return 0;
2004}
2005
2006void
2007bgp_print(const u_char *dat, int length)
2008{
2009 const u_char *p;
2010 const u_char *ep;
2011 const u_char *start;
2012 const u_char marker[] = {
2013 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
2014 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
2015 };
2016 struct bgp bgp;
2017 u_int16_t hlen;
2018 char tokbuf[TOKBUFSIZE];
2019
2020 ep = dat + length;
2021 if (snapend < dat + length)
2022 ep = snapend;
2023
2024 printf(": BGP, length: %u",length);
2025
2026 if (vflag < 1) /* lets be less chatty */
2027 return;
2028
2029 p = dat;
2030 start = p;
2031 while (p < ep) {
2032 if (!TTEST2(p[0], 1))
2033 break;
2034 if (p[0] != 0xff) {
2035 p++;
2036 continue;
2037 }
2038
2039 if (!TTEST2(p[0], sizeof(marker)))
2040 break;
2041 if (memcmp(p, marker, sizeof(marker)) != 0) {
2042 p++;
2043 continue;
2044 }
2045
2046 /* found BGP header */
2047 TCHECK2(p[0], BGP_SIZE); /*XXX*/
2048 memcpy(&bgp, p, BGP_SIZE);
2049
2050 if (start != p)
2051 printf(" [|BGP]");
2052
2053 hlen = ntohs(bgp.bgp_len);
2054 if (hlen < BGP_SIZE) {
2055 printf("\n[|BGP Bogus header length %u < %u]", hlen,
2056 BGP_SIZE);
2057 break;
2058 }
2059
2060 if (TTEST2(p[0], hlen)) {
2061 if (!bgp_header_print(p, hlen))
2062 return;
2063 p += hlen;
2064 start = p;
2065 } else {
2066 printf("\n[|BGP %s]",
2067 tok2strbuf(bgp_msg_values,
2068 "Unknown Message Type",
2069 bgp.bgp_type,
2070 tokbuf, sizeof(tokbuf)));
2071 break;
2072 }
2073 }
2074
2075 return;
2076
2077trunc:
2078 printf(" [|BGP]");
2079}