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[dragonfly/port-amd64.git] / contrib / tcpdump-3.9 / print-bgp.c
blob299beba4cd6230cfedb0dd2dc752693a751edad4
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 1.91.2.9 2006/02/02 12:36:46 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 #define AFNUM_VPLS 25
359 /* draft-kompella-ppvpn-l2vpn */
360 #define AFNUM_L2VPN 196 /* still to be approved by IANA */
361
362 static struct tok bgp_afi_values[] = {
363 { 0, "Reserved"},
364 { AFNUM_INET, "IPv4"},
365 { AFNUM_INET6, "IPv6"},
366 { AFNUM_NSAP, "NSAP"},
367 { AFNUM_HDLC, "HDLC"},
368 { AFNUM_BBN1822, "BBN 1822"},
369 { AFNUM_802, "802"},
370 { AFNUM_E163, "E.163"},
371 { AFNUM_E164, "E.164"},
372 { AFNUM_F69, "F.69"},
373 { AFNUM_X121, "X.121"},
374 { AFNUM_IPX, "Novell IPX"},
375 { AFNUM_ATALK, "Appletalk"},
376 { AFNUM_DECNET, "Decnet IV"},
377 { AFNUM_BANYAN, "Banyan Vines"},
378 { AFNUM_E164NSAP, "E.164 with NSAP subaddress"},
379 { AFNUM_L2VPN, "Layer-2 VPN"},
380 { AFNUM_VPLS, "VPLS"},
381 { 0, NULL},
382 };
383
384 /* Extended community type - draft-ietf-idr-bgp-ext-communities-05 */
385 #define BGP_EXT_COM_RT_0 0x0002 /* Route Target,Format AS(2bytes):AN(4bytes) */
386 #define BGP_EXT_COM_RT_1 0x0102 /* Route Target,Format IP address:AN(2bytes) */
387 #define BGP_EXT_COM_RT_2 0x0202 /* Route Target,Format AN(4bytes):local(2bytes) */
388 #define BGP_EXT_COM_RO_0 0x0003 /* Route Origin,Format AS(2bytes):AN(4bytes) */
389 #define BGP_EXT_COM_RO_1 0x0103 /* Route Origin,Format IP address:AN(2bytes) */
390 #define BGP_EXT_COM_RO_2 0x0203 /* Route Origin,Format AN(4bytes):local(2bytes) */
391 #define BGP_EXT_COM_LINKBAND 0x4004 /* Link Bandwidth,Format AS(2B):Bandwidth(4B) */
392 /* rfc2547 bgp-mpls-vpns */
393 #define BGP_EXT_COM_CISCO_MCAST 0x0009 /* cisco proprietary */
394
395 #define BGP_EXT_COM_VPN_ORIGIN 0x0005 /* OSPF Domain ID / VPN of Origin - draft-rosen-vpns-ospf-bgp-mpls */
396 #define BGP_EXT_COM_VPN_ORIGIN2 0x0105 /* duplicate - keep for backwards compatability */
397 #define BGP_EXT_COM_VPN_ORIGIN3 0x0205 /* duplicate - keep for backwards compatability */
398 #define BGP_EXT_COM_VPN_ORIGIN4 0x8005 /* duplicate - keep for backwards compatability */
399
400 #define BGP_EXT_COM_OSPF_RTYPE 0x0306 /* OSPF Route Type,Format Area(4B):RouteType(1B):Options(1B) */
401 #define BGP_EXT_COM_OSPF_RTYPE2 0x8000 /* duplicate - keep for backwards compatability */
402
403 #define BGP_EXT_COM_OSPF_RID 0x0107 /* OSPF Router ID,Format RouterID(4B):Unused(2B) */
404 #define BGP_EXT_COM_OSPF_RID2 0x8001 /* duplicate - keep for backwards compatability */
405
406 #define BGP_EXT_COM_L2INFO 0x800a /* draft-kompella-ppvpn-l2vpn */
407
408 /* http://www.cisco.com/en/US/tech/tk436/tk428/technologies_tech_note09186a00801eb09a.shtml */
409 #define BGP_EXT_COM_EIGRP_GEN 0x8800
410 #define BGP_EXT_COM_EIGRP_METRIC_AS_DELAY 0x8801
411 #define BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW 0x8802
412 #define BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU 0x8803
413 #define BGP_EXT_COM_EIGRP_EXT_REMAS_REMID 0x8804
414 #define BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC 0x8805
415
416 static struct tok bgp_extd_comm_flag_values[] = {
417 { 0x8000, "vendor-specific"},
418 { 0x4000, "non-transitive"},
419 { 0, NULL},
420 };
421
422 static struct tok bgp_extd_comm_subtype_values[] = {
423 { BGP_EXT_COM_RT_0, "target"},
424 { BGP_EXT_COM_RT_1, "target"},
425 { BGP_EXT_COM_RT_2, "target"},
426 { BGP_EXT_COM_RO_0, "origin"},
427 { BGP_EXT_COM_RO_1, "origin"},
428 { BGP_EXT_COM_RO_2, "origin"},
429 { BGP_EXT_COM_LINKBAND, "link-BW"},
430 { BGP_EXT_COM_CISCO_MCAST, "mdt-group"},
431 { BGP_EXT_COM_VPN_ORIGIN, "ospf-domain"},
432 { BGP_EXT_COM_VPN_ORIGIN2, "ospf-domain"},
433 { BGP_EXT_COM_VPN_ORIGIN3, "ospf-domain"},
434 { BGP_EXT_COM_VPN_ORIGIN4, "ospf-domain"},
435 { BGP_EXT_COM_OSPF_RTYPE, "ospf-route-type"},
436 { BGP_EXT_COM_OSPF_RTYPE2, "ospf-route-type"},
437 { BGP_EXT_COM_OSPF_RID, "ospf-router-id"},
438 { BGP_EXT_COM_OSPF_RID2, "ospf-router-id"},
439 { BGP_EXT_COM_L2INFO, "layer2-info"},
440 { BGP_EXT_COM_EIGRP_GEN , "eigrp-general-route (flag, tag)" },
441 { BGP_EXT_COM_EIGRP_METRIC_AS_DELAY , "eigrp-route-metric (AS, delay)" },
442 { BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW , "eigrp-route-metric (reliability, nexthop, bandwidth)" },
443 { BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU , "eigrp-route-metric (load, MTU)" },
444 { BGP_EXT_COM_EIGRP_EXT_REMAS_REMID , "eigrp-external-route (remote-AS, remote-ID)" },
445 { BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC , "eigrp-external-route (remote-proto, remote-metric)" },
446 { 0, NULL},
447 };
448
449 /* OSPF codes for BGP_EXT_COM_OSPF_RTYPE draft-rosen-vpns-ospf-bgp-mpls */
450 #define BGP_OSPF_RTYPE_RTR 1 /* OSPF Router LSA */
451 #define BGP_OSPF_RTYPE_NET 2 /* OSPF Network LSA */
452 #define BGP_OSPF_RTYPE_SUM 3 /* OSPF Summary LSA */
453 #define BGP_OSPF_RTYPE_EXT 5 /* OSPF External LSA, note that ASBR doesn't apply to MPLS-VPN */
454 #define BGP_OSPF_RTYPE_NSSA 7 /* OSPF NSSA External*/
455 #define BGP_OSPF_RTYPE_SHAM 129 /* OSPF-MPLS-VPN Sham link */
456 #define BGP_OSPF_RTYPE_METRIC_TYPE 0x1 /* LSB of RTYPE Options Field */
457
458 static struct tok bgp_extd_comm_ospf_rtype_values[] = {
459 { BGP_OSPF_RTYPE_RTR, "Router" },
460 { BGP_OSPF_RTYPE_NET, "Network" },
461 { BGP_OSPF_RTYPE_SUM, "Summary" },
462 { BGP_OSPF_RTYPE_EXT, "External" },
463 { BGP_OSPF_RTYPE_NSSA,"NSSA External" },
464 { BGP_OSPF_RTYPE_SHAM,"MPLS-VPN Sham" },
465 { 0, NULL },
466 };
467
468 int
469 decode_prefix4(const u_char *pptr, char *buf, u_int buflen)
470 {
471 struct in_addr addr;
472 u_int plen;
473
474 TCHECK(pptr[0]);
475 plen = pptr[0];
476 if (32 < plen)
477 return -1;
478
479 memset(&addr, 0, sizeof(addr));
480 TCHECK2(pptr[1], (plen + 7) / 8);
481 memcpy(&addr, &pptr[1], (plen + 7) / 8);
482 if (plen % 8) {
483 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
484 ((0xff00 >> (plen % 8)) & 0xff);
485 }
486 snprintf(buf, buflen, "%s/%d", getname((u_char *)&addr), plen);
487 return 1 + (plen + 7) / 8;
488
489 trunc:
490 return -2;
491 }
492
493 static int
494 decode_labeled_prefix4(const u_char *pptr, char *buf, u_int buflen)
495 {
496 struct in_addr addr;
497 u_int plen;
498
499 TCHECK(pptr[0]);
500 plen = pptr[0]; /* get prefix length */
501
502 /* this is one of the weirdnesses of rfc3107
503 the label length (actually the label + COS bits)
504 is added to the prefix length;
505 we also do only read out just one label -
506 there is no real application for advertisement of
507 stacked labels in a a single BGP message
508 */
509
510 if (24 > plen)
511 return -1;
512
513 plen-=24; /* adjust prefixlen - labellength */
514
515 if (32 < plen)
516 return -1;
517
518 memset(&addr, 0, sizeof(addr));
519 TCHECK2(pptr[4], (plen + 7) / 8);
520 memcpy(&addr, &pptr[4], (plen + 7) / 8);
521 if (plen % 8) {
522 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
523 ((0xff00 >> (plen % 8)) & 0xff);
524 }
525 /* the label may get offsetted by 4 bits so lets shift it right */
526 snprintf(buf, buflen, "%s/%d, label:%u %s",
527 getname((u_char *)&addr),
528 plen,
529 EXTRACT_24BITS(pptr+1)>>4,
530 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
531
532 return 4 + (plen + 7) / 8;
533
534 trunc:
535 return -2;
536 }
537
538 /* RDs and RTs share the same semantics
539 * we use bgp_vpn_rd_print for
540 * printing route targets inside a NLRI */
541 char *
542 bgp_vpn_rd_print (const u_char *pptr) {
543
544 /* allocate space for the largest possible string */
545 static char rd[sizeof("xxxxxxxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")];
546 char *pos = rd;
547
548 /* ok lets load the RD format */
549 switch (EXTRACT_16BITS(pptr)) {
550
551 /* AS:IP-address fmt*/
552 case 0:
553 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u.%u.%u.%u",
554 EXTRACT_16BITS(pptr+2), *(pptr+4), *(pptr+5), *(pptr+6), *(pptr+7));
555 break;
556 /* IP-address:AS fmt*/
557
558 case 1:
559 snprintf(pos, sizeof(rd) - (pos - rd), "%u.%u.%u.%u:%u",
560 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
561 break;
562
563 /* 4-byte-AS:number fmt*/
564 case 2:
565 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u (%u.%u.%u.%u:%u)",
566 EXTRACT_32BITS(pptr+2), EXTRACT_16BITS(pptr+6),
567 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
568 break;
569 default:
570 snprintf(pos, sizeof(rd) - (pos - rd), "unknown RD format");
571 break;
572 }
573 pos += strlen(pos);
574 *(pos) = '\0';
575 return (rd);
576 }
577
578 static int
579 decode_rt_routing_info(const u_char *pptr, char *buf, u_int buflen)
580 {
581 u_int8_t route_target[8];
582 u_int plen;
583
584 TCHECK(pptr[0]);
585 plen = pptr[0]; /* get prefix length */
586
587 if (0 == plen)
588 return 1; /* default route target */
589
590 if (32 > plen)
591 return -1;
592
593 plen-=32; /* adjust prefix length */
594
595 if (64 < plen)
596 return -1;
597
598 memset(&route_target, 0, sizeof(route_target));
599 TCHECK2(pptr[1], (plen + 7) / 8);
600 memcpy(&route_target, &pptr[1], (plen + 7) / 8);
601 if (plen % 8) {
602 ((u_char *)&route_target)[(plen + 7) / 8 - 1] &=
603 ((0xff00 >> (plen % 8)) & 0xff);
604 }
605 snprintf(buf, buflen, "origin AS: %u, route target %s",
606 EXTRACT_32BITS(pptr+1),
607 bgp_vpn_rd_print((u_char *)&route_target));
608
609 return 5 + (plen + 7) / 8;
610
611 trunc:
612 return -2;
613 }
614
615 static int
616 decode_labeled_vpn_prefix4(const u_char *pptr, char *buf, u_int buflen)
617 {
618 struct in_addr addr;
619 u_int plen;
620
621 TCHECK(pptr[0]);
622 plen = pptr[0]; /* get prefix length */
623
624 if ((24+64) > plen)
625 return -1;
626
627 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
628
629 if (32 < plen)
630 return -1;
631
632 memset(&addr, 0, sizeof(addr));
633 TCHECK2(pptr[12], (plen + 7) / 8);
634 memcpy(&addr, &pptr[12], (plen + 7) / 8);
635 if (plen % 8) {
636 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
637 ((0xff00 >> (plen % 8)) & 0xff);
638 }
639 /* the label may get offsetted by 4 bits so lets shift it right */
640 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
641 bgp_vpn_rd_print(pptr+4),
642 getname((u_char *)&addr),
643 plen,
644 EXTRACT_24BITS(pptr+1)>>4,
645 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
646
647 return 12 + (plen + 7) / 8;
648
649 trunc:
650 return -2;
651 }
652
653 static int
654 decode_labeled_vpn_l2(const u_char *pptr, char *buf, u_int buflen)
655 {
656 int plen,tlen,strlen,tlv_type,tlv_len,ttlv_len;
657
658 TCHECK2(pptr[0], 2);
659 plen=EXTRACT_16BITS(pptr);
660 tlen=plen;
661 pptr+=2;
662 TCHECK2(pptr[0],15);
663 strlen=snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u",
664 bgp_vpn_rd_print(pptr),
665 EXTRACT_16BITS(pptr+8),
666 EXTRACT_16BITS(pptr+10),
667 EXTRACT_24BITS(pptr+12)>>4); /* the label is offsetted by 4 bits so lets shift it right */
668 pptr+=15;
669 tlen-=15;
670
671 /* ok now the variable part - lets read out TLVs*/
672 while (tlen>0) {
673 if (tlen < 3)
674 return -1;
675 TCHECK2(pptr[0], 3);
676 tlv_type=*pptr++;
677 tlv_len=EXTRACT_16BITS(pptr);
678 ttlv_len=tlv_len;
679 pptr+=2;
680
681 switch(tlv_type) {
682 case 1:
683 strlen+=snprintf(buf+strlen,buflen-strlen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
684 tlv_type,
685 tlv_len);
686 ttlv_len=ttlv_len/8+1; /* how many bytes do we need to read ? */
687 while (ttlv_len>0) {
688 TCHECK(pptr[0]);
689 strlen+=snprintf(buf+strlen,buflen-strlen, "%02x",*pptr++);
690 ttlv_len--;
691 }
692 break;
693 default:
694 snprintf(buf+strlen,buflen-strlen, "\n\t\tunknown TLV #%u, length: %u",
695 tlv_type,
696 tlv_len);
697 break;
698 }
699 tlen-=(tlv_len<<3); /* the tlv-length is expressed in bits so lets shift it tright */
700 }
701 return plen+2;
702
703 trunc:
704 return -2;
705 }
706
707 #ifdef INET6
708 int
709 decode_prefix6(const u_char *pd, char *buf, u_int buflen)
710 {
711 struct in6_addr addr;
712 u_int plen;
713
714 TCHECK(pd[0]);
715 plen = pd[0];
716 if (128 < plen)
717 return -1;
718
719 memset(&addr, 0, sizeof(addr));
720 TCHECK2(pd[1], (plen + 7) / 8);
721 memcpy(&addr, &pd[1], (plen + 7) / 8);
722 if (plen % 8) {
723 addr.s6_addr[(plen + 7) / 8 - 1] &=
724 ((0xff00 >> (plen % 8)) & 0xff);
725 }
726 snprintf(buf, buflen, "%s/%d", getname6((u_char *)&addr), plen);
727 return 1 + (plen + 7) / 8;
728
729 trunc:
730 return -2;
731 }
732
733 static int
734 decode_labeled_prefix6(const u_char *pptr, char *buf, u_int buflen)
735 {
736 struct in6_addr addr;
737 u_int plen;
738
739 TCHECK(pptr[0]);
740 plen = pptr[0]; /* get prefix length */
741
742 if (24 > plen)
743 return -1;
744
745 plen-=24; /* adjust prefixlen - labellength */
746
747 if (128 < plen)
748 return -1;
749
750 memset(&addr, 0, sizeof(addr));
751 TCHECK2(pptr[4], (plen + 7) / 8);
752 memcpy(&addr, &pptr[4], (plen + 7) / 8);
753 if (plen % 8) {
754 addr.s6_addr[(plen + 7) / 8 - 1] &=
755 ((0xff00 >> (plen % 8)) & 0xff);
756 }
757 /* the label may get offsetted by 4 bits so lets shift it right */
758 snprintf(buf, buflen, "%s/%d, label:%u %s",
759 getname6((u_char *)&addr),
760 plen,
761 EXTRACT_24BITS(pptr+1)>>4,
762 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
763
764 return 4 + (plen + 7) / 8;
765
766 trunc:
767 return -2;
768 }
769
770 static int
771 decode_labeled_vpn_prefix6(const u_char *pptr, char *buf, u_int buflen)
772 {
773 struct in6_addr addr;
774 u_int plen;
775
776 TCHECK(pptr[0]);
777 plen = pptr[0]; /* get prefix length */
778
779 if ((24+64) > plen)
780 return -1;
781
782 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
783
784 if (128 < plen)
785 return -1;
786
787 memset(&addr, 0, sizeof(addr));
788 TCHECK2(pptr[12], (plen + 7) / 8);
789 memcpy(&addr, &pptr[12], (plen + 7) / 8);
790 if (plen % 8) {
791 addr.s6_addr[(plen + 7) / 8 - 1] &=
792 ((0xff00 >> (plen % 8)) & 0xff);
793 }
794 /* the label may get offsetted by 4 bits so lets shift it right */
795 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
796 bgp_vpn_rd_print(pptr+4),
797 getname6((u_char *)&addr),
798 plen,
799 EXTRACT_24BITS(pptr+1)>>4,
800 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
801
802 return 12 + (plen + 7) / 8;
803
804 trunc:
805 return -2;
806 }
807 #endif
808
809 static int
810 decode_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
811 {
812 u_int8_t addr[19];
813 u_int plen;
814
815 TCHECK(pptr[0]);
816 plen = pptr[0]; /* get prefix length */
817
818 if (152 < plen)
819 return -1;
820
821 memset(&addr, 0, sizeof(addr));
822 TCHECK2(pptr[4], (plen + 7) / 8);
823 memcpy(&addr, &pptr[4], (plen + 7) / 8);
824 if (plen % 8) {
825 addr[(plen + 7) / 8 - 1] &=
826 ((0xff00 >> (plen % 8)) & 0xff);
827 }
828 snprintf(buf, buflen, "%s/%d",
829 isonsap_string(addr,(plen + 7) / 8),
830 plen);
831
832 return 1 + (plen + 7) / 8;
833
834 trunc:
835 return -2;
836 }
837
838 static int
839 decode_labeled_vpn_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
840 {
841 u_int8_t addr[19];
842 u_int plen;
843
844 TCHECK(pptr[0]);
845 plen = pptr[0]; /* get prefix length */
846
847 if ((24+64) > plen)
848 return -1;
849
850 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
851
852 if (152 < plen)
853 return -1;
854
855 memset(&addr, 0, sizeof(addr));
856 TCHECK2(pptr[12], (plen + 7) / 8);
857 memcpy(&addr, &pptr[12], (plen + 7) / 8);
858 if (plen % 8) {
859 addr[(plen + 7) / 8 - 1] &=
860 ((0xff00 >> (plen % 8)) & 0xff);
861 }
862 /* the label may get offsetted by 4 bits so lets shift it right */
863 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
864 bgp_vpn_rd_print(pptr+4),
865 isonsap_string(addr,(plen + 7) / 8),
866 plen,
867 EXTRACT_24BITS(pptr+1)>>4,
868 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
869
870 return 12 + (plen + 7) / 8;
871
872 trunc:
873 return -2;
874 }
875
876 static int
877 bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len)
878 {
879 int i;
880 u_int16_t af;
881 u_int8_t safi, snpa, nhlen;
882 union { /* copy buffer for bandwidth values */
883 float f;
884 u_int32_t i;
885 } bw;
886 int advance;
887 int tlen;
888 const u_char *tptr;
889 char buf[MAXHOSTNAMELEN + 100];
890 char tokbuf[TOKBUFSIZE];
891
892 tptr = pptr;
893 tlen=len;
894
895 switch (attr->bgpa_type) {
896 case BGPTYPE_ORIGIN:
897 if (len != 1)
898 printf("invalid len");
899 else {
900 TCHECK(*tptr);
901 printf("%s", tok2strbuf(bgp_origin_values,
902 "Unknown Origin Typecode",
903 tptr[0],
904 tokbuf, sizeof(tokbuf)));
905 }
906 break;
907
908 case BGPTYPE_AS_PATH:
909 if (len % 2) {
910 printf("invalid len");
911 break;
912 }
913 if (!len) {
914 printf("empty");
915 break;
916 }
917
918 while (tptr < pptr + len) {
919 TCHECK(tptr[0]);
920 printf("%s", tok2strbuf(bgp_as_path_segment_open_values,
921 "?", tptr[0],
922 tokbuf, sizeof(tokbuf)));
923 for (i = 0; i < tptr[1] * 2; i += 2) {
924 TCHECK2(tptr[2 + i], 2);
925 printf("%u ", EXTRACT_16BITS(&tptr[2 + i]));
926 }
927 TCHECK(tptr[0]);
928 printf("%s", tok2strbuf(bgp_as_path_segment_close_values,
929 "?", tptr[0],
930 tokbuf, sizeof(tokbuf)));
931 TCHECK(tptr[1]);
932 tptr += 2 + tptr[1] * 2;
933 }
934 break;
935 case BGPTYPE_NEXT_HOP:
936 if (len != 4)
937 printf("invalid len");
938 else {
939 TCHECK2(tptr[0], 4);
940 printf("%s", getname(tptr));
941 }
942 break;
943 case BGPTYPE_MULTI_EXIT_DISC:
944 case BGPTYPE_LOCAL_PREF:
945 if (len != 4)
946 printf("invalid len");
947 else {
948 TCHECK2(tptr[0], 4);
949 printf("%u", EXTRACT_32BITS(tptr));
950 }
951 break;
952 case BGPTYPE_ATOMIC_AGGREGATE:
953 if (len != 0)
954 printf("invalid len");
955 break;
956 case BGPTYPE_AGGREGATOR:
957 if (len != 6) {
958 printf("invalid len");
959 break;
960 }
961 TCHECK2(tptr[0], 6);
962 printf(" AS #%u, origin %s", EXTRACT_16BITS(tptr),
963 getname(tptr + 2));
964 break;
965 case BGPTYPE_COMMUNITIES:
966 if (len % 4) {
967 printf("invalid len");
968 break;
969 }
970 while (tlen>0) {
971 u_int32_t comm;
972 TCHECK2(tptr[0], 4);
973 comm = EXTRACT_32BITS(tptr);
974 switch (comm) {
975 case BGP_COMMUNITY_NO_EXPORT:
976 printf(" NO_EXPORT");
977 break;
978 case BGP_COMMUNITY_NO_ADVERT:
979 printf(" NO_ADVERTISE");
980 break;
981 case BGP_COMMUNITY_NO_EXPORT_SUBCONFED:
982 printf(" NO_EXPORT_SUBCONFED");
983 break;
984 default:
985 printf("%u:%u%s",
986 (comm >> 16) & 0xffff,
987 comm & 0xffff,
988 (tlen>4) ? ", " : "");
989 break;
990 }
991 tlen -=4;
992 tptr +=4;
993 }
994 break;
995 case BGPTYPE_ORIGINATOR_ID:
996 if (len != 4) {
997 printf("invalid len");
998 break;
999 }
1000 TCHECK2(tptr[0], 4);
1001 printf("%s",getname(tptr));
1002 break;
1003 case BGPTYPE_CLUSTER_LIST:
1004 if (len % 4) {
1005 printf("invalid len");
1006 break;
1007 }
1008 while (tlen>0) {
1009 TCHECK2(tptr[0], 4);
1010 printf("%s%s",
1011 getname(tptr),
1012 (tlen>4) ? ", " : "");
1013 tlen -=4;
1014 tptr +=4;
1015 }
1016 break;
1017 case BGPTYPE_MP_REACH_NLRI:
1018 TCHECK2(tptr[0], 3);
1019 af = EXTRACT_16BITS(tptr);
1020 safi = tptr[2];
1021
1022 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1023 tok2strbuf(bgp_afi_values, "Unknown AFI", af,
1024 tokbuf, sizeof(tokbuf)),
1025 af,
1026 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1027 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1028 tokbuf, sizeof(tokbuf)),
1029 safi);
1030
1031 switch(af<<8 | safi) {
1032 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1033 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1034 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1035 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1036 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1037 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1038 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1039 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1040 #ifdef INET6
1041 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1042 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1043 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1044 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1045 case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1046 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1047 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1048 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1049 #endif
1050 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1051 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1052 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1053 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1054 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1055 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1056 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1057 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1058 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1059 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1060 break;
1061 default:
1062 TCHECK2(tptr[0], tlen);
1063 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1064 if (vflag <= 1)
1065 print_unknown_data(tptr,"\n\t ",tlen);
1066 goto done;
1067 break;
1068 }
1069
1070 tptr +=3;
1071
1072 TCHECK(tptr[0]);
1073 nhlen = tptr[0];
1074 tlen = nhlen;
1075 tptr++;
1076
1077 if (tlen) {
1078 printf("\n\t nexthop: ");
1079 while (tlen > 0) {
1080 switch(af<<8 | safi) {
1081 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1082 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1083 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1084 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1085 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1086 if (tlen < (int)sizeof(struct in_addr)) {
1087 printf("invalid len");
1088 tlen = 0;
1089 } else {
1090 TCHECK2(tptr[0], sizeof(struct in_addr));
1091 printf("%s",getname(tptr));
1092 tlen -= sizeof(struct in_addr);
1093 tptr += sizeof(struct in_addr);
1094 }
1095 break;
1096 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1097 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1098 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1099 if (tlen < (int)(sizeof(struct in_addr)+BGP_VPN_RD_LEN)) {
1100 printf("invalid len");
1101 tlen = 0;
1102 } else {
1103 TCHECK2(tptr[0], sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1104 printf("RD: %s, %s",
1105 bgp_vpn_rd_print(tptr),
1106 getname(tptr+BGP_VPN_RD_LEN));
1107 tlen -= (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1108 tptr += (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1109 }
1110 break;
1111 #ifdef INET6
1112 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1113 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1114 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1115 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1116 case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1117 if (tlen < (int)sizeof(struct in6_addr)) {
1118 printf("invalid len");
1119 tlen = 0;
1120 } else {
1121 TCHECK2(tptr[0], sizeof(struct in6_addr));
1122 printf("%s", getname6(tptr));
1123 tlen -= sizeof(struct in6_addr);
1124 tptr += sizeof(struct in6_addr);
1125 }
1126 break;
1127 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1128 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1129 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1130 if (tlen < (int)(sizeof(struct in6_addr)+BGP_VPN_RD_LEN)) {
1131 printf("invalid len");
1132 tlen = 0;
1133 } else {
1134 TCHECK2(tptr[0], sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1135 printf("RD: %s, %s",
1136 bgp_vpn_rd_print(tptr),
1137 getname6(tptr+BGP_VPN_RD_LEN));
1138 tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1139 tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1140 }
1141 break;
1142 #endif
1143 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1144 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1145 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1146 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1147 if (tlen < (int)sizeof(struct in_addr)) {
1148 printf("invalid len");
1149 tlen = 0;
1150 } else {
1151 TCHECK2(tptr[0], sizeof(struct in_addr));
1152 printf("%s", getname(tptr));
1153 tlen -= (sizeof(struct in_addr));
1154 tptr += (sizeof(struct in_addr));
1155 }
1156 break;
1157 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1158 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1159 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1160 TCHECK2(tptr[0], tlen);
1161 printf("%s",isonsap_string(tptr,tlen));
1162 tptr += tlen;
1163 tlen = 0;
1164 break;
1165
1166 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1167 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1168 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1169 if (tlen < BGP_VPN_RD_LEN+1) {
1170 printf("invalid len");
1171 tlen = 0;
1172 } else {
1173 TCHECK2(tptr[0], tlen);
1174 printf("RD: %s, %s",
1175 bgp_vpn_rd_print(tptr),
1176 isonsap_string(tptr+BGP_VPN_RD_LEN,tlen-BGP_VPN_RD_LEN));
1177 /* rfc986 mapped IPv4 address ? */
1178 if (EXTRACT_32BITS(tptr+BGP_VPN_RD_LEN) == 0x47000601)
1179 printf(" = %s", getname(tptr+BGP_VPN_RD_LEN+4));
1180 #ifdef INET6
1181 /* rfc1888 mapped IPv6 address ? */
1182 else if (EXTRACT_24BITS(tptr+BGP_VPN_RD_LEN) == 0x350000)
1183 printf(" = %s", getname6(tptr+BGP_VPN_RD_LEN+3));
1184 #endif
1185 tptr += tlen;
1186 tlen = 0;
1187 }
1188 break;
1189 default:
1190 TCHECK2(tptr[0], tlen);
1191 printf("no AFI %u/SAFI %u decoder",af,safi);
1192 if (vflag <= 1)
1193 print_unknown_data(tptr,"\n\t ",tlen);
1194 tptr += tlen;
1195 tlen = 0;
1196 goto done;
1197 break;
1198 }
1199 }
1200 }
1201 printf(", nh-length: %u", nhlen);
1202 tptr += tlen;
1203
1204 TCHECK(tptr[0]);
1205 snpa = tptr[0];
1206 tptr++;
1207
1208 if (snpa) {
1209 printf("\n\t %u SNPA", snpa);
1210 for (/*nothing*/; snpa > 0; snpa--) {
1211 TCHECK(tptr[0]);
1212 printf("\n\t %d bytes", tptr[0]);
1213 tptr += tptr[0] + 1;
1214 }
1215 } else {
1216 printf(", no SNPA");
1217 }
1218
1219 while (len - (tptr - pptr) > 0) {
1220 switch (af<<8 | safi) {
1221 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1222 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1223 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1224 advance = decode_prefix4(tptr, buf, sizeof(buf));
1225 if (advance == -1)
1226 printf("\n\t (illegal prefix length)");
1227 else if (advance == -2)
1228 goto trunc;
1229 else
1230 printf("\n\t %s", buf);
1231 break;
1232 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1233 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1234 if (advance == -1)
1235 printf("\n\t (illegal prefix length)");
1236 else if (advance == -2)
1237 goto trunc;
1238 else
1239 printf("\n\t %s", buf);
1240 break;
1241 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1242 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1243 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1244 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1245 if (advance == -1)
1246 printf("\n\t (illegal prefix length)");
1247 else if (advance == -2)
1248 goto trunc;
1249 else
1250 printf("\n\t %s", buf);
1251 break;
1252 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1253 advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1254 if (advance == -1)
1255 printf("\n\t (illegal prefix length)");
1256 else if (advance == -2)
1257 goto trunc;
1258 else
1259 printf("\n\t %s", buf);
1260 break;
1261 #ifdef INET6
1262 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1263 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1264 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1265 advance = decode_prefix6(tptr, buf, sizeof(buf));
1266 if (advance == -1)
1267 printf("\n\t (illegal prefix length)");
1268 else if (advance == -2)
1269 goto trunc;
1270 else
1271 printf("\n\t %s", buf);
1272 break;
1273 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1274 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1275 if (advance == -1)
1276 printf("\n\t (illegal prefix length)");
1277 else if (advance == -2)
1278 goto trunc;
1279 else
1280 printf("\n\t %s", buf);
1281 break;
1282 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1283 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1284 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1285 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1286 if (advance == -1)
1287 printf("\n\t (illegal prefix length)");
1288 else if (advance == -2)
1289 goto trunc;
1290 else
1291 printf("\n\t %s", buf);
1292 break;
1293 case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1294 advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1295 if (advance == -1)
1296 printf("\n\t (illegal prefix length)");
1297 else if (advance == -2)
1298 goto trunc;
1299 else
1300 printf("\n\t %s", buf);
1301 break;
1302 #endif
1303 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1304 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1305 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1306 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1307 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1308 if (advance == -1)
1309 printf("\n\t (illegal length)");
1310 else if (advance == -2)
1311 goto trunc;
1312 else
1313 printf("\n\t %s", buf);
1314 break;
1315 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1316 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1317 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1318 advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1319 if (advance == -1)
1320 printf("\n\t (illegal prefix length)");
1321 else if (advance == -2)
1322 goto trunc;
1323 else
1324 printf("\n\t %s", buf);
1325 break;
1326 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1327 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1328 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1329 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1330 if (advance == -1)
1331 printf("\n\t (illegal prefix length)");
1332 else if (advance == -2)
1333 goto trunc;
1334 else
1335 printf("\n\t %s", buf);
1336 break;
1337 default:
1338 TCHECK2(*tptr,tlen);
1339 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1340 if (vflag <= 1)
1341 print_unknown_data(tptr,"\n\t ",tlen);
1342 advance = 0;
1343 tptr = pptr + len;
1344 break;
1345 }
1346 if (advance < 0)
1347 break;
1348 tptr += advance;
1349 }
1350 done:
1351 break;
1352
1353 case BGPTYPE_MP_UNREACH_NLRI:
1354 TCHECK2(tptr[0], BGP_MP_NLRI_MINSIZE);
1355 af = EXTRACT_16BITS(tptr);
1356 safi = tptr[2];
1357
1358 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1359 tok2strbuf(bgp_afi_values, "Unknown AFI", af,
1360 tokbuf, sizeof(tokbuf)),
1361 af,
1362 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1363 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1364 tokbuf, sizeof(tokbuf)),
1365 safi);
1366
1367 if (len == BGP_MP_NLRI_MINSIZE)
1368 printf("\n\t End-of-Rib Marker (empty NLRI)");
1369
1370 tptr += 3;
1371
1372 while (len - (tptr - pptr) > 0) {
1373 switch (af<<8 | safi) {
1374 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1375 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1376 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1377 advance = decode_prefix4(tptr, buf, sizeof(buf));
1378 if (advance == -1)
1379 printf("\n\t (illegal prefix length)");
1380 else if (advance == -2)
1381 goto trunc;
1382 else
1383 printf("\n\t %s", buf);
1384 break;
1385 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1386 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1387 if (advance == -1)
1388 printf("\n\t (illegal prefix length)");
1389 else if (advance == -2)
1390 goto trunc;
1391 else
1392 printf("\n\t %s", buf);
1393 break;
1394 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1395 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1396 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1397 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1398 if (advance == -1)
1399 printf("\n\t (illegal prefix length)");
1400 else if (advance == -2)
1401 goto trunc;
1402 else
1403 printf("\n\t %s", buf);
1404 break;
1405 #ifdef INET6
1406 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1407 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1408 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1409 advance = decode_prefix6(tptr, buf, sizeof(buf));
1410 if (advance == -1)
1411 printf("\n\t (illegal prefix length)");
1412 else if (advance == -2)
1413 goto trunc;
1414 else
1415 printf("\n\t %s", buf);
1416 break;
1417 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1418 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1419 if (advance == -1)
1420 printf("\n\t (illegal prefix length)");
1421 else if (advance == -2)
1422 goto trunc;
1423 else
1424 printf("\n\t %s", buf);
1425 break;
1426 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1427 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1428 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1429 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1430 if (advance == -1)
1431 printf("\n\t (illegal prefix length)");
1432 else if (advance == -2)
1433 goto trunc;
1434 else
1435 printf("\n\t %s", buf);
1436 break;
1437 #endif
1438 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1439 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1440 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1441 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1442 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1443 if (advance == -1)
1444 printf("\n\t (illegal length)");
1445 else if (advance == -2)
1446 goto trunc;
1447 else
1448 printf("\n\t %s", buf);
1449 break;
1450 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1451 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1452 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1453 advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1454 if (advance == -1)
1455 printf("\n\t (illegal prefix length)");
1456 else if (advance == -2)
1457 goto trunc;
1458 else
1459 printf("\n\t %s", buf);
1460 break;
1461 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1462 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1463 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1464 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1465 if (advance == -1)
1466 printf("\n\t (illegal prefix length)");
1467 else if (advance == -2)
1468 goto trunc;
1469 else
1470 printf("\n\t %s", buf);
1471 break;
1472 default:
1473 TCHECK2(*(tptr-3),tlen);
1474 printf("no AFI %u / SAFI %u decoder",af,safi);
1475 if (vflag <= 1)
1476 print_unknown_data(tptr-3,"\n\t ",tlen);
1477 advance = 0;
1478 tptr = pptr + len;
1479 break;
1480 }
1481 if (advance < 0)
1482 break;
1483 tptr += advance;
1484 }
1485 break;
1486 case BGPTYPE_EXTD_COMMUNITIES:
1487 if (len % 8) {
1488 printf("invalid len");
1489 break;
1490 }
1491 while (tlen>0) {
1492 u_int16_t extd_comm;
1493
1494 TCHECK2(tptr[0], 2);
1495 extd_comm=EXTRACT_16BITS(tptr);
1496
1497 printf("\n\t %s (0x%04x), Flags [%s]",
1498 tok2strbuf(bgp_extd_comm_subtype_values,
1499 "unknown extd community typecode",
1500 extd_comm, tokbuf, sizeof(tokbuf)),
1501 extd_comm,
1502 bittok2str(bgp_extd_comm_flag_values, "none", extd_comm));
1503
1504 TCHECK2(*(tptr+2), 6);
1505 switch(extd_comm) {
1506 case BGP_EXT_COM_RT_0:
1507 case BGP_EXT_COM_RO_0:
1508 printf(": %u:%s",
1509 EXTRACT_16BITS(tptr+2),
1510 getname(tptr+4));
1511 break;
1512 case BGP_EXT_COM_RT_1:
1513 case BGP_EXT_COM_RO_1:
1514 printf(": %s:%u",
1515 getname(tptr+2),
1516 EXTRACT_16BITS(tptr+6));
1517 break;
1518 case BGP_EXT_COM_RT_2:
1519 case BGP_EXT_COM_RO_2:
1520 printf(": %u:%u",
1521 EXTRACT_32BITS(tptr+2),
1522 EXTRACT_16BITS(tptr+6));
1523 break;
1524 case BGP_EXT_COM_LINKBAND:
1525 bw.i = EXTRACT_32BITS(tptr+2);
1526 printf(": bandwidth: %.3f Mbps",
1527 bw.f*8/1000000);
1528 break;
1529 case BGP_EXT_COM_CISCO_MCAST:
1530 printf(": AS %u, group %s",
1531 EXTRACT_16BITS(tptr+2),
1532 getname(tptr+4));
1533 break;
1534 case BGP_EXT_COM_VPN_ORIGIN:
1535 case BGP_EXT_COM_VPN_ORIGIN2:
1536 case BGP_EXT_COM_VPN_ORIGIN3:
1537 case BGP_EXT_COM_VPN_ORIGIN4:
1538 case BGP_EXT_COM_OSPF_RID:
1539 case BGP_EXT_COM_OSPF_RID2:
1540 printf("%s", getname(tptr+2));
1541 break;
1542 case BGP_EXT_COM_OSPF_RTYPE:
1543 case BGP_EXT_COM_OSPF_RTYPE2:
1544 printf(": area:%s, router-type:%s, metric-type:%s%s",
1545 getname(tptr+2),
1546 tok2strbuf(bgp_extd_comm_ospf_rtype_values,
1547 "unknown (0x%02x)",
1548 *(tptr+6),
1549 tokbuf, sizeof(tokbuf)),
1550 (*(tptr+7) & BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "",
1551 (*(tptr+6) == (BGP_OSPF_RTYPE_EXT ||BGP_OSPF_RTYPE_NSSA )) ? "E1" : "");
1552 break;
1553 case BGP_EXT_COM_L2INFO:
1554 printf(": %s Control Flags [0x%02x]:MTU %u",
1555 tok2strbuf(l2vpn_encaps_values,
1556 "unknown encaps",
1557 *(tptr+2),
1558 tokbuf, sizeof(tokbuf)),
1559 *(tptr+3),
1560 EXTRACT_16BITS(tptr+4));
1561 break;
1562 default:
1563 TCHECK2(*tptr,8);
1564 print_unknown_data(tptr,"\n\t ",8);
1565 break;
1566 }
1567 tlen -=8;
1568 tptr +=8;
1569 }
1570 break;
1571
1572 case BGPTYPE_ATTR_SET:
1573 TCHECK2(tptr[0], 4);
1574 printf("\n\t Origin AS: %u", EXTRACT_32BITS(tptr));
1575 tptr+=4;
1576 len -=4;
1577
1578 while (len >= 2 ) {
1579 int alen;
1580 struct bgp_attr bgpa;
1581
1582 TCHECK2(tptr[0], sizeof(bgpa));
1583 memcpy(&bgpa, tptr, sizeof(bgpa));
1584 alen = bgp_attr_len(&bgpa);
1585 tptr += bgp_attr_off(&bgpa);
1586 len -= bgp_attr_off(&bgpa);
1587
1588 printf("\n\t %s (%u), length: %u",
1589 tok2strbuf(bgp_attr_values,
1590 "Unknown Attribute", bgpa.bgpa_type,
1591 tokbuf, sizeof(tokbuf)),
1592 bgpa.bgpa_type,
1593 alen);
1594
1595 if (bgpa.bgpa_flags) {
1596 printf(", Flags [%s%s%s%s",
1597 bgpa.bgpa_flags & 0x80 ? "O" : "",
1598 bgpa.bgpa_flags & 0x40 ? "T" : "",
1599 bgpa.bgpa_flags & 0x20 ? "P" : "",
1600 bgpa.bgpa_flags & 0x10 ? "E" : "");
1601 if (bgpa.bgpa_flags & 0xf)
1602 printf("+%x", bgpa.bgpa_flags & 0xf);
1603 printf("]: ");
1604 }
1605 /* FIXME check for recursion */
1606 if (!bgp_attr_print(&bgpa, tptr, alen))
1607 return 0;
1608 tptr += alen;
1609 len -= alen;
1610 }
1611 break;
1612
1613
1614 default:
1615 TCHECK2(*pptr,len);
1616 printf("\n\t no Attribute %u decoder",attr->bgpa_type); /* we have no decoder for the attribute */
1617 if (vflag <= 1)
1618 print_unknown_data(pptr,"\n\t ",len);
1619 break;
1620 }
1621 if (vflag > 1 && len) { /* omit zero length attributes*/
1622 TCHECK2(*pptr,len);
1623 print_unknown_data(pptr,"\n\t ",len);
1624 }
1625 return 1;
1626
1627 trunc:
1628 return 0;
1629 }
1630
1631 static void
1632 bgp_open_print(const u_char *dat, int length)
1633 {
1634 struct bgp_open bgpo;
1635 struct bgp_opt bgpopt;
1636 const u_char *opt;
1637 int i,cap_type,cap_len,tcap_len,cap_offset;
1638 char tokbuf[TOKBUFSIZE];
1639 char tokbuf2[TOKBUFSIZE];
1640
1641 TCHECK2(dat[0], BGP_OPEN_SIZE);
1642 memcpy(&bgpo, dat, BGP_OPEN_SIZE);
1643
1644 printf("\n\t Version %d, ", bgpo.bgpo_version);
1645 printf("my AS %u, ", ntohs(bgpo.bgpo_myas));
1646 printf("Holdtime %us, ", ntohs(bgpo.bgpo_holdtime));
1647 printf("ID %s", getname((u_char *)&bgpo.bgpo_id));
1648 printf("\n\t Optional parameters, length: %u", bgpo.bgpo_optlen);
1649
1650 /* some little sanity checking */
1651 if (length < bgpo.bgpo_optlen+BGP_OPEN_SIZE)
1652 return;
1653
1654 /* ugly! */
1655 opt = &((const struct bgp_open *)dat)->bgpo_optlen;
1656 opt++;
1657
1658 i = 0;
1659 while (i < bgpo.bgpo_optlen) {
1660 TCHECK2(opt[i], BGP_OPT_SIZE);
1661 memcpy(&bgpopt, &opt[i], BGP_OPT_SIZE);
1662 if (i + 2 + bgpopt.bgpopt_len > bgpo.bgpo_optlen) {
1663 printf("\n\t Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len);
1664 break;
1665 }
1666
1667 printf("\n\t Option %s (%u), length: %u",
1668 tok2strbuf(bgp_opt_values,"Unknown",
1669 bgpopt.bgpopt_type,
1670 tokbuf, sizeof(tokbuf)),
1671 bgpopt.bgpopt_type,
1672 bgpopt.bgpopt_len);
1673
1674 /* now lets decode the options we know*/
1675 switch(bgpopt.bgpopt_type) {
1676 case BGP_OPT_CAP:
1677 cap_type=opt[i+BGP_OPT_SIZE];
1678 cap_len=opt[i+BGP_OPT_SIZE+1];
1679 tcap_len=cap_len;
1680 printf("\n\t %s (%u), length: %u",
1681 tok2strbuf(bgp_capcode_values, "Unknown",
1682 cap_type, tokbuf, sizeof(tokbuf)),
1683 cap_type,
1684 cap_len);
1685 switch(cap_type) {
1686 case BGP_CAPCODE_MP:
1687 printf("\n\t\tAFI %s (%u), SAFI %s (%u)",
1688 tok2strbuf(bgp_afi_values, "Unknown",
1689 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1690 tokbuf, sizeof(tokbuf)),
1691 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1692 tok2strbuf(bgp_safi_values, "Unknown",
1693 opt[i+BGP_OPT_SIZE+5],
1694 tokbuf, sizeof(tokbuf)),
1695 opt[i+BGP_OPT_SIZE+5]);
1696 break;
1697 case BGP_CAPCODE_RESTART:
1698 printf("\n\t\tRestart Flags: [%s], Restart Time %us",
1699 ((opt[i+BGP_OPT_SIZE+2])&0x80) ? "R" : "none",
1700 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2)&0xfff);
1701 tcap_len-=2;
1702 cap_offset=4;
1703 while(tcap_len>=4) {
1704 printf("\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s",
1705 tok2strbuf(bgp_afi_values,"Unknown",
1706 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1707 tokbuf, sizeof(tokbuf)),
1708 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1709 tok2strbuf(bgp_safi_values,"Unknown",
1710 opt[i+BGP_OPT_SIZE+cap_offset+2],
1711 tokbuf2, sizeof(tokbuf2)),
1712 opt[i+BGP_OPT_SIZE+cap_offset+2],
1713 ((opt[i+BGP_OPT_SIZE+cap_offset+3])&0x80) ? "yes" : "no" );
1714 tcap_len-=4;
1715 cap_offset+=4;
1716 }
1717 break;
1718 case BGP_CAPCODE_RR:
1719 case BGP_CAPCODE_RR_CISCO:
1720 break;
1721 default:
1722 TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
1723 printf("\n\t\tno decoder for Capability %u",
1724 cap_type);
1725 if (vflag <= 1)
1726 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
1727 break;
1728 }
1729 if (vflag > 1) {
1730 TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
1731 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
1732 }
1733 break;
1734 case BGP_OPT_AUTH:
1735 default:
1736 printf("\n\t no decoder for option %u",
1737 bgpopt.bgpopt_type);
1738 break;
1739 }
1740
1741 i += BGP_OPT_SIZE + bgpopt.bgpopt_len;
1742 }
1743 return;
1744 trunc:
1745 printf("[|BGP]");
1746 }
1747
1748 static void
1749 bgp_update_print(const u_char *dat, int length)
1750 {
1751 struct bgp bgp;
1752 struct bgp_attr bgpa;
1753 const u_char *p;
1754 int len;
1755 int i;
1756 char tokbuf[TOKBUFSIZE];
1757
1758 TCHECK2(dat[0], BGP_SIZE);
1759 memcpy(&bgp, dat, BGP_SIZE);
1760 p = dat + BGP_SIZE; /*XXX*/
1761
1762 /* Unfeasible routes */
1763 len = EXTRACT_16BITS(p);
1764 if (len) {
1765 /*
1766 * Without keeping state from the original NLRI message,
1767 * it's not possible to tell if this a v4 or v6 route,
1768 * so only try to decode it if we're not v6 enabled.
1769 */
1770 #ifdef INET6
1771 printf("\n\t Withdrawn routes: %d bytes", len);
1772 #else
1773 char buf[MAXHOSTNAMELEN + 100];
1774 int wpfx;
1775
1776 TCHECK2(p[2], len);
1777 i = 2;
1778
1779 printf("\n\t Withdrawn routes:");
1780
1781 while(i < 2 + len) {
1782 wpfx = decode_prefix4(&p[i], buf, sizeof(buf));
1783 if (wpfx == -1) {
1784 printf("\n\t (illegal prefix length)");
1785 break;
1786 } else if (wpfx == -2)
1787 goto trunc;
1788 else {
1789 i += wpfx;
1790 printf("\n\t %s", buf);
1791 }
1792 }
1793 #endif
1794 }
1795 p += 2 + len;
1796
1797 TCHECK2(p[0], 2);
1798 len = EXTRACT_16BITS(p);
1799
1800 if (len == 0 && length == BGP_UPDATE_MINSIZE) {
1801 printf("\n\t End-of-Rib Marker (empty NLRI)");
1802 return;
1803 }
1804
1805 if (len) {
1806 /* do something more useful!*/
1807 i = 2;
1808 while (i < 2 + len) {
1809 int alen, aoff;
1810
1811 TCHECK2(p[i], sizeof(bgpa));
1812 memcpy(&bgpa, &p[i], sizeof(bgpa));
1813 alen = bgp_attr_len(&bgpa);
1814 aoff = bgp_attr_off(&bgpa);
1815
1816 printf("\n\t %s (%u), length: %u",
1817 tok2strbuf(bgp_attr_values, "Unknown Attribute",
1818 bgpa.bgpa_type,
1819 tokbuf, sizeof(tokbuf)),
1820 bgpa.bgpa_type,
1821 alen);
1822
1823 if (bgpa.bgpa_flags) {
1824 printf(", Flags [%s%s%s%s",
1825 bgpa.bgpa_flags & 0x80 ? "O" : "",
1826 bgpa.bgpa_flags & 0x40 ? "T" : "",
1827 bgpa.bgpa_flags & 0x20 ? "P" : "",
1828 bgpa.bgpa_flags & 0x10 ? "E" : "");
1829 if (bgpa.bgpa_flags & 0xf)
1830 printf("+%x", bgpa.bgpa_flags & 0xf);
1831 printf("]: ");
1832 }
1833 if (!bgp_attr_print(&bgpa, &p[i + aoff], alen))
1834 goto trunc;
1835 i += aoff + alen;
1836 }
1837 }
1838 p += 2 + len;
1839
1840 if (dat + length > p) {
1841 printf("\n\t Updated routes:");
1842 while (dat + length > p) {
1843 char buf[MAXHOSTNAMELEN + 100];
1844 i = decode_prefix4(p, buf, sizeof(buf));
1845 if (i == -1) {
1846 printf("\n\t (illegal prefix length)");
1847 break;
1848 } else if (i == -2)
1849 goto trunc;
1850 else {
1851 printf("\n\t %s", buf);
1852 p += i;
1853 }
1854 }
1855 }
1856 return;
1857 trunc:
1858 printf("[|BGP]");
1859 }
1860
1861 static void
1862 bgp_notification_print(const u_char *dat, int length)
1863 {
1864 struct bgp_notification bgpn;
1865 const u_char *tptr;
1866 char tokbuf[TOKBUFSIZE];
1867 char tokbuf2[TOKBUFSIZE];
1868
1869 TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
1870 memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
1871
1872 /* some little sanity checking */
1873 if (length<BGP_NOTIFICATION_SIZE)
1874 return;
1875
1876 printf(", %s (%u)",
1877 tok2strbuf(bgp_notify_major_values, "Unknown Error",
1878 bgpn.bgpn_major, tokbuf, sizeof(tokbuf)),
1879 bgpn.bgpn_major);
1880
1881 switch (bgpn.bgpn_major) {
1882
1883 case BGP_NOTIFY_MAJOR_MSG:
1884 printf(", subcode %s (%u)",
1885 tok2strbuf(bgp_notify_minor_msg_values, "Unknown",
1886 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1887 bgpn.bgpn_minor);
1888 break;
1889 case BGP_NOTIFY_MAJOR_OPEN:
1890 printf(", subcode %s (%u)",
1891 tok2strbuf(bgp_notify_minor_open_values, "Unknown",
1892 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1893 bgpn.bgpn_minor);
1894 break;
1895 case BGP_NOTIFY_MAJOR_UPDATE:
1896 printf(", subcode %s (%u)",
1897 tok2strbuf(bgp_notify_minor_update_values, "Unknown",
1898 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1899 bgpn.bgpn_minor);
1900 break;
1901 case BGP_NOTIFY_MAJOR_CAP:
1902 printf(" subcode %s (%u)",
1903 tok2strbuf(bgp_notify_minor_cap_values, "Unknown",
1904 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1905 bgpn.bgpn_minor);
1906 case BGP_NOTIFY_MAJOR_CEASE:
1907 printf(", subcode %s (%u)",
1908 tok2strbuf(bgp_notify_minor_cease_values, "Unknown",
1909 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1910 bgpn.bgpn_minor);
1911
1912 /* draft-ietf-idr-cease-subcode-02 mentions optionally 7 bytes
1913 * for the maxprefix subtype, which may contain AFI, SAFI and MAXPREFIXES
1914 */
1915 if(bgpn.bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= BGP_NOTIFICATION_SIZE + 7) {
1916 tptr = dat + BGP_NOTIFICATION_SIZE;
1917 TCHECK2(*tptr, 7);
1918 printf(", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
1919 tok2strbuf(bgp_afi_values, "Unknown",
1920 EXTRACT_16BITS(tptr), tokbuf, sizeof(tokbuf)),
1921 EXTRACT_16BITS(tptr),
1922 tok2strbuf(bgp_safi_values, "Unknown", *(tptr+2),
1923 tokbuf2, sizeof(tokbuf)),
1924 *(tptr+2),
1925 EXTRACT_32BITS(tptr+3));
1926 }
1927 break;
1928 default:
1929 break;
1930 }
1931
1932 return;
1933 trunc:
1934 printf("[|BGP]");
1935 }
1936
1937 static void
1938 bgp_route_refresh_print(const u_char *pptr, int len) {
1939
1940 const struct bgp_route_refresh *bgp_route_refresh_header;
1941 char tokbuf[TOKBUFSIZE];
1942 char tokbuf2[TOKBUFSIZE];
1943
1944 TCHECK2(pptr[0], BGP_ROUTE_REFRESH_SIZE);
1945
1946 /* some little sanity checking */
1947 if (len<BGP_ROUTE_REFRESH_SIZE)
1948 return;
1949
1950 bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
1951
1952 printf("\n\t AFI %s (%u), SAFI %s (%u)",
1953 tok2strbuf(bgp_afi_values,"Unknown",
1954 /* this stinks but the compiler pads the structure
1955 * weird */
1956 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
1957 tokbuf, sizeof(tokbuf)),
1958 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
1959 tok2strbuf(bgp_safi_values,"Unknown",
1960 bgp_route_refresh_header->safi,
1961 tokbuf2, sizeof(tokbuf2)),
1962 bgp_route_refresh_header->safi);
1963
1964 if (vflag > 1) {
1965 TCHECK2(*pptr, len);
1966 print_unknown_data(pptr,"\n\t ", len);
1967 }
1968
1969 return;
1970 trunc:
1971 printf("[|BGP]");
1972 }
1973
1974 static int
1975 bgp_header_print(const u_char *dat, int length)
1976 {
1977 struct bgp bgp;
1978 char tokbuf[TOKBUFSIZE];
1979
1980 TCHECK2(dat[0], BGP_SIZE);
1981 memcpy(&bgp, dat, BGP_SIZE);
1982 printf("\n\t%s Message (%u), length: %u",
1983 tok2strbuf(bgp_msg_values, "Unknown", bgp.bgp_type,
1984 tokbuf, sizeof(tokbuf)),
1985 bgp.bgp_type,
1986 length);
1987
1988 switch (bgp.bgp_type) {
1989 case BGP_OPEN:
1990 bgp_open_print(dat, length);
1991 break;
1992 case BGP_UPDATE:
1993 bgp_update_print(dat, length);
1994 break;
1995 case BGP_NOTIFICATION:
1996 bgp_notification_print(dat, length);
1997 break;
1998 case BGP_KEEPALIVE:
1999 break;
2000 case BGP_ROUTE_REFRESH:
2001 bgp_route_refresh_print(dat, length);
2002 break;
2003 default:
2004 /* we have no decoder for the BGP message */
2005 TCHECK2(*dat, length);
2006 printf("\n\t no Message %u decoder",bgp.bgp_type);
2007 print_unknown_data(dat,"\n\t ",length);
2008 break;
2009 }
2010 return 1;
2011 trunc:
2012 printf("[|BGP]");
2013 return 0;
2014 }
2015
2016 void
2017 bgp_print(const u_char *dat, int length)
2018 {
2019 const u_char *p;
2020 const u_char *ep;
2021 const u_char *start;
2022 const u_char marker[] = {
2023 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
2024 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
2025 };
2026 struct bgp bgp;
2027 u_int16_t hlen;
2028 char tokbuf[TOKBUFSIZE];
2029
2030 ep = dat + length;
2031 if (snapend < dat + length)
2032 ep = snapend;
2033
2034 printf(": BGP, length: %u",length);
2035
2036 if (vflag < 1) /* lets be less chatty */
2037 return;
2038
2039 p = dat;
2040 start = p;
2041 while (p < ep) {
2042 if (!TTEST2(p[0], 1))
2043 break;
2044 if (p[0] != 0xff) {
2045 p++;
2046 continue;
2047 }
2048
2049 if (!TTEST2(p[0], sizeof(marker)))
2050 break;
2051 if (memcmp(p, marker, sizeof(marker)) != 0) {
2052 p++;
2053 continue;
2054 }
2055
2056 /* found BGP header */
2057 TCHECK2(p[0], BGP_SIZE); /*XXX*/
2058 memcpy(&bgp, p, BGP_SIZE);
2059
2060 if (start != p)
2061 printf(" [|BGP]");
2062
2063 hlen = ntohs(bgp.bgp_len);
2064 if (hlen < BGP_SIZE) {
2065 printf("\n[|BGP Bogus header length %u < %u]", hlen,
2066 BGP_SIZE);
2067 break;
2068 }
2069
2070 if (TTEST2(p[0], hlen)) {
2071 if (!bgp_header_print(p, hlen))
2072 return;
2073 p += hlen;
2074 start = p;
2075 } else {
2076 printf("\n[|BGP %s]",
2077 tok2strbuf(bgp_msg_values,
2078 "Unknown Message Type",
2079 bgp.bgp_type,
2080 tokbuf, sizeof(tokbuf)));
2081 break;
2082 }
2083 }
2084
2085 return;
2086
2087 trunc:
2088 printf(" [|BGP]");
2089 }
A repo for keeping AMD64 port code before merging with the master