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[tcpdump] / print-bgp.c
1 /*
2 * Copyright (C) 1999 WIDE Project.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * Extensively modified by Hannes Gredler (hannes@juniper.net) for more
30 * complete BGP support.
31 */
32
33 #ifdef HAVE_CONFIG_H
34 #include "config.h"
35 #endif
36
37 #ifndef lint
38 static const char rcsid[] _U_ =
39 "@(#) $Header: /tcpdump/master/tcpdump/print-bgp.c,v 1.117 2007-10-05 02:00:11 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 "af.h"
53 #include "l2vpn.h"
54
55 struct bgp {
56 u_int8_t bgp_marker[16];
57 u_int16_t bgp_len;
58 u_int8_t bgp_type;
59 };
60 #define BGP_SIZE 19 /* unaligned */
61
62 #define BGP_OPEN 1
63 #define BGP_UPDATE 2
64 #define BGP_NOTIFICATION 3
65 #define BGP_KEEPALIVE 4
66 #define BGP_ROUTE_REFRESH 5
67
68 static struct tok bgp_msg_values[] = {
69 { BGP_OPEN, "Open"},
70 { BGP_UPDATE, "Update"},
71 { BGP_NOTIFICATION, "Notification"},
72 { BGP_KEEPALIVE, "Keepalive"},
73 { BGP_ROUTE_REFRESH, "Route Refresh"},
74 { 0, NULL}
75 };
76
77 struct bgp_open {
78 u_int8_t bgpo_marker[16];
79 u_int16_t bgpo_len;
80 u_int8_t bgpo_type;
81 u_int8_t bgpo_version;
82 u_int16_t bgpo_myas;
83 u_int16_t bgpo_holdtime;
84 u_int32_t bgpo_id;
85 u_int8_t bgpo_optlen;
86 /* options should follow */
87 };
88 #define BGP_OPEN_SIZE 29 /* unaligned */
89
90 struct bgp_opt {
91 u_int8_t bgpopt_type;
92 u_int8_t bgpopt_len;
93 /* variable length */
94 };
95 #define BGP_OPT_SIZE 2 /* some compilers may pad to 4 bytes */
96
97 #define BGP_UPDATE_MINSIZE 23
98
99 struct bgp_notification {
100 u_int8_t bgpn_marker[16];
101 u_int16_t bgpn_len;
102 u_int8_t bgpn_type;
103 u_int8_t bgpn_major;
104 u_int8_t bgpn_minor;
105 };
106 #define BGP_NOTIFICATION_SIZE 21 /* unaligned */
107
108 struct bgp_route_refresh {
109 u_int8_t bgp_marker[16];
110 u_int16_t len;
111 u_int8_t type;
112 u_int8_t afi[2]; /* the compiler messes this structure up */
113 u_int8_t res; /* when doing misaligned sequences of int8 and int16 */
114 u_int8_t safi; /* afi should be int16 - so we have to access it using */
115 }; /* EXTRACT_16BITS(&bgp_route_refresh->afi) (sigh) */
116 #define BGP_ROUTE_REFRESH_SIZE 23
117
118 struct bgp_attr {
119 u_int8_t bgpa_flags;
120 u_int8_t bgpa_type;
121 union {
122 u_int8_t len;
123 u_int16_t elen;
124 } bgpa_len;
125 #define bgp_attr_len(p) \
126 (((p)->bgpa_flags & 0x10) ? \
127 EXTRACT_16BITS(&(p)->bgpa_len.elen) : (p)->bgpa_len.len)
128 #define bgp_attr_off(p) \
129 (((p)->bgpa_flags & 0x10) ? 4 : 3)
130 };
131
132 #define BGPTYPE_ORIGIN 1
133 #define BGPTYPE_AS_PATH 2
134 #define BGPTYPE_NEXT_HOP 3
135 #define BGPTYPE_MULTI_EXIT_DISC 4
136 #define BGPTYPE_LOCAL_PREF 5
137 #define BGPTYPE_ATOMIC_AGGREGATE 6
138 #define BGPTYPE_AGGREGATOR 7
139 #define BGPTYPE_COMMUNITIES 8 /* RFC1997 */
140 #define BGPTYPE_ORIGINATOR_ID 9 /* RFC1998 */
141 #define BGPTYPE_CLUSTER_LIST 10 /* RFC1998 */
142 #define BGPTYPE_DPA 11 /* draft-ietf-idr-bgp-dpa */
143 #define BGPTYPE_ADVERTISERS 12 /* RFC1863 */
144 #define BGPTYPE_RCID_PATH 13 /* RFC1863 */
145 #define BGPTYPE_MP_REACH_NLRI 14 /* RFC2283 */
146 #define BGPTYPE_MP_UNREACH_NLRI 15 /* RFC2283 */
147 #define BGPTYPE_EXTD_COMMUNITIES 16 /* draft-ietf-idr-bgp-ext-communities */
148 #define BGPTYPE_PMSI_TUNNEL 22 /* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */
149 #define BGPTYPE_ATTR_SET 128 /* draft-marques-ppvpn-ibgp */
150
151 #define BGP_MP_NLRI_MINSIZE 3 /* End of RIB Marker detection */
152
153 static struct tok bgp_attr_values[] = {
154 { BGPTYPE_ORIGIN, "Origin"},
155 { BGPTYPE_AS_PATH, "AS Path"},
156 { BGPTYPE_NEXT_HOP, "Next Hop"},
157 { BGPTYPE_MULTI_EXIT_DISC, "Multi Exit Discriminator"},
158 { BGPTYPE_LOCAL_PREF, "Local Preference"},
159 { BGPTYPE_ATOMIC_AGGREGATE, "Atomic Aggregate"},
160 { BGPTYPE_AGGREGATOR, "Aggregator"},
161 { BGPTYPE_COMMUNITIES, "Community"},
162 { BGPTYPE_ORIGINATOR_ID, "Originator ID"},
163 { BGPTYPE_CLUSTER_LIST, "Cluster List"},
164 { BGPTYPE_DPA, "DPA"},
165 { BGPTYPE_ADVERTISERS, "Advertisers"},
166 { BGPTYPE_RCID_PATH, "RCID Path / Cluster ID"},
167 { BGPTYPE_MP_REACH_NLRI, "Multi-Protocol Reach NLRI"},
168 { BGPTYPE_MP_UNREACH_NLRI, "Multi-Protocol Unreach NLRI"},
169 { BGPTYPE_EXTD_COMMUNITIES, "Extended Community"},
170 { BGPTYPE_PMSI_TUNNEL, "PMSI Tunnel"},
171 { BGPTYPE_ATTR_SET, "Attribute Set"},
172 { 255, "Reserved for development"},
173 { 0, NULL}
174 };
175
176 #define BGP_AS_SET 1
177 #define BGP_AS_SEQUENCE 2
178 #define BGP_CONFED_AS_SEQUENCE 3 /* draft-ietf-idr-rfc3065bis-01 */
179 #define BGP_CONFED_AS_SET 4 /* draft-ietf-idr-rfc3065bis-01 */
180
181 static int bgp_as_path_segment_known[] = {
182 BGP_AS_SEQUENCE,
183 BGP_AS_SET,
184 BGP_CONFED_AS_SEQUENCE,
185 BGP_CONFED_AS_SET,
186 0
187 };
188
189 static struct tok bgp_as_path_segment_open_values[] = {
190 { BGP_AS_SEQUENCE, ""},
191 { BGP_AS_SET, "{ "},
192 { BGP_CONFED_AS_SEQUENCE, "( "},
193 { BGP_CONFED_AS_SET, "({ "},
194 { 0, NULL}
195 };
196
197 static struct tok bgp_as_path_segment_close_values[] = {
198 { BGP_AS_SEQUENCE, ""},
199 { BGP_AS_SET, "}"},
200 { BGP_CONFED_AS_SEQUENCE, ")"},
201 { BGP_CONFED_AS_SET, "})"},
202 { 0, NULL}
203 };
204
205 #define BGP_OPT_AUTH 1
206 #define BGP_OPT_CAP 2
207
208
209 static struct tok bgp_opt_values[] = {
210 { BGP_OPT_AUTH, "Authentication Information"},
211 { BGP_OPT_CAP, "Capabilities Advertisement"},
212 { 0, NULL}
213 };
214
215 #define BGP_CAPCODE_MP 1
216 #define BGP_CAPCODE_RR 2
217 #define BGP_CAPCODE_ORF 3 /* XXX */
218 #define BGP_CAPCODE_RESTART 64 /* draft-ietf-idr-restart-05 */
219 #define BGP_CAPCODE_AS_NEW 65 /* XXX */
220 #define BGP_CAPCODE_DYN_CAP 67 /* XXX */
221 #define BGP_CAPCODE_RR_CISCO 128
222
223 static struct tok bgp_capcode_values[] = {
224 { BGP_CAPCODE_MP, "Multiprotocol Extensions"},
225 { BGP_CAPCODE_RR, "Route Refresh"},
226 { BGP_CAPCODE_ORF, "Cooperative Route Filtering"},
227 { BGP_CAPCODE_RESTART, "Graceful Restart"},
228 { BGP_CAPCODE_AS_NEW, "32-Bit AS Number"},
229 { BGP_CAPCODE_DYN_CAP, "Dynamic Capability"},
230 { BGP_CAPCODE_RR_CISCO, "Route Refresh (Cisco)"},
231 { 0, NULL}
232 };
233
234 #define BGP_NOTIFY_MAJOR_MSG 1
235 #define BGP_NOTIFY_MAJOR_OPEN 2
236 #define BGP_NOTIFY_MAJOR_UPDATE 3
237 #define BGP_NOTIFY_MAJOR_HOLDTIME 4
238 #define BGP_NOTIFY_MAJOR_FSM 5
239 #define BGP_NOTIFY_MAJOR_CEASE 6
240 #define BGP_NOTIFY_MAJOR_CAP 7
241
242 static struct tok bgp_notify_major_values[] = {
243 { BGP_NOTIFY_MAJOR_MSG, "Message Header Error"},
244 { BGP_NOTIFY_MAJOR_OPEN, "OPEN Message Error"},
245 { BGP_NOTIFY_MAJOR_UPDATE, "UPDATE Message Error"},
246 { BGP_NOTIFY_MAJOR_HOLDTIME,"Hold Timer Expired"},
247 { BGP_NOTIFY_MAJOR_FSM, "Finite State Machine Error"},
248 { BGP_NOTIFY_MAJOR_CEASE, "Cease"},
249 { BGP_NOTIFY_MAJOR_CAP, "Capability Message Error"},
250 { 0, NULL}
251 };
252
253 /* draft-ietf-idr-cease-subcode-02 */
254 #define BGP_NOTIFY_MINOR_CEASE_MAXPRFX 1
255 static struct tok bgp_notify_minor_cease_values[] = {
256 { BGP_NOTIFY_MINOR_CEASE_MAXPRFX, "Maximum Number of Prefixes Reached"},
257 { 2, "Administratively Shutdown"},
258 { 3, "Peer Unconfigured"},
259 { 4, "Administratively Reset"},
260 { 5, "Connection Rejected"},
261 { 6, "Other Configuration Change"},
262 { 7, "Connection Collision Resolution"},
263 { 0, NULL}
264 };
265
266 static struct tok bgp_notify_minor_msg_values[] = {
267 { 1, "Connection Not Synchronized"},
268 { 2, "Bad Message Length"},
269 { 3, "Bad Message Type"},
270 { 0, NULL}
271 };
272
273 static struct tok bgp_notify_minor_open_values[] = {
274 { 1, "Unsupported Version Number"},
275 { 2, "Bad Peer AS"},
276 { 3, "Bad BGP Identifier"},
277 { 4, "Unsupported Optional Parameter"},
278 { 5, "Authentication Failure"},
279 { 6, "Unacceptable Hold Time"},
280 { 7, "Capability Message Error"},
281 { 0, NULL}
282 };
283
284 static struct tok bgp_notify_minor_update_values[] = {
285 { 1, "Malformed Attribute List"},
286 { 2, "Unrecognized Well-known Attribute"},
287 { 3, "Missing Well-known Attribute"},
288 { 4, "Attribute Flags Error"},
289 { 5, "Attribute Length Error"},
290 { 6, "Invalid ORIGIN Attribute"},
291 { 7, "AS Routing Loop"},
292 { 8, "Invalid NEXT_HOP Attribute"},
293 { 9, "Optional Attribute Error"},
294 { 10, "Invalid Network Field"},
295 { 11, "Malformed AS_PATH"},
296 { 0, NULL}
297 };
298
299 static struct tok bgp_notify_minor_cap_values[] = {
300 { 1, "Invalid Action Value" },
301 { 2, "Invalid Capability Length" },
302 { 3, "Malformed Capability Value" },
303 { 4, "Unsupported Capability Code" },
304 { 0, NULL }
305 };
306
307 static struct tok bgp_origin_values[] = {
308 { 0, "IGP"},
309 { 1, "EGP"},
310 { 2, "Incomplete"},
311 { 0, NULL}
312 };
313
314 #define BGP_PMSI_TUNNEL_RSVP_P2MP 1
315 #define BGP_PMSI_TUNNEL_LDP_P2MP 2
316 #define BGP_PMSI_TUNNEL_PIM_SSM 3
317 #define BGP_PMSI_TUNNEL_PIM_SM 4
318 #define BGP_PMSI_TUNNEL_PIM_BIDIR 5
319 #define BGP_PMSI_TUNNEL_INGRESS 6
320 #define BGP_PMSI_TUNNEL_LDP_MP2MP 7
321
322 static struct tok bgp_pmsi_tunnel_values[] = {
323 { BGP_PMSI_TUNNEL_RSVP_P2MP, "RSVP-TE P2MP LSP"},
324 { BGP_PMSI_TUNNEL_LDP_P2MP, "LDP P2MP LSP"},
325 { BGP_PMSI_TUNNEL_PIM_SSM, "PIM-SSM Tree"},
326 { BGP_PMSI_TUNNEL_PIM_SM, "PIM-SM Tree"},
327 { BGP_PMSI_TUNNEL_PIM_BIDIR, "PIM-Bidir Tree"},
328 { BGP_PMSI_TUNNEL_INGRESS, "Ingress Replication"},
329 { BGP_PMSI_TUNNEL_LDP_MP2MP, "LDP MP2MP LSP"},
330 { 0, NULL}
331 };
332
333 static struct tok bgp_pmsi_flag_values[] = {
334 { 0x01, "Leaf Information required"},
335 { 0, NULL}
336 };
337
338
339 /* Subsequent address family identifier, RFC2283 section 7 */
340 #define SAFNUM_RES 0
341 #define SAFNUM_UNICAST 1
342 #define SAFNUM_MULTICAST 2
343 #define SAFNUM_UNIMULTICAST 3
344 /* labeled BGP RFC3107 */
345 #define SAFNUM_LABUNICAST 4
346 /* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */
347 #define SAFNUM_MULTICAST_VPN 5
348 #define SAFNUM_TUNNEL 64 /* XXX */
349 #define SAFNUM_VPLS 65 /* XXX */
350 #define SAFNUM_MDT 66 /* XXX */
351 /* Section 4.3.4 of draft-rosen-rfc2547bis-03.txt */
352 #define SAFNUM_VPNUNICAST 128
353 #define SAFNUM_VPNMULTICAST 129
354 #define SAFNUM_VPNUNIMULTICAST 130
355 /* draft-marques-ppvpn-rt-constrain-01.txt */
356 #define SAFNUM_RT_ROUTING_INFO 132
357
358 #define BGP_VPN_RD_LEN 8
359
360 static struct tok bgp_safi_values[] = {
361 { SAFNUM_RES, "Reserved"},
362 { SAFNUM_UNICAST, "Unicast"},
363 { SAFNUM_MULTICAST, "Multicast"},
364 { SAFNUM_UNIMULTICAST, "Unicast+Multicast"},
365 { SAFNUM_LABUNICAST, "labeled Unicast"},
366 { SAFNUM_TUNNEL, "Tunnel"},
367 { SAFNUM_VPLS, "VPLS"},
368 { SAFNUM_MDT, "MDT"},
369 { SAFNUM_VPNUNICAST, "labeled VPN Unicast"},
370 { SAFNUM_VPNMULTICAST, "labeled VPN Multicast"},
371 { SAFNUM_VPNUNIMULTICAST, "labeled VPN Unicast+Multicast"},
372 { SAFNUM_RT_ROUTING_INFO, "Route Target Routing Information"},
373 { SAFNUM_MULTICAST_VPN, "Multicast VPN"},
374 { 0, NULL }
375 };
376
377 /* well-known community */
378 #define BGP_COMMUNITY_NO_EXPORT 0xffffff01
379 #define BGP_COMMUNITY_NO_ADVERT 0xffffff02
380 #define BGP_COMMUNITY_NO_EXPORT_SUBCONFED 0xffffff03
381
382 /* Extended community type - draft-ietf-idr-bgp-ext-communities-05 */
383 #define BGP_EXT_COM_RT_0 0x0002 /* Route Target,Format AS(2bytes):AN(4bytes) */
384 #define BGP_EXT_COM_RT_1 0x0102 /* Route Target,Format IP address:AN(2bytes) */
385 #define BGP_EXT_COM_RT_2 0x0202 /* Route Target,Format AN(4bytes):local(2bytes) */
386 #define BGP_EXT_COM_RO_0 0x0003 /* Route Origin,Format AS(2bytes):AN(4bytes) */
387 #define BGP_EXT_COM_RO_1 0x0103 /* Route Origin,Format IP address:AN(2bytes) */
388 #define BGP_EXT_COM_RO_2 0x0203 /* Route Origin,Format AN(4bytes):local(2bytes) */
389 #define BGP_EXT_COM_LINKBAND 0x4004 /* Link Bandwidth,Format AS(2B):Bandwidth(4B) */
390 /* rfc2547 bgp-mpls-vpns */
391 #define BGP_EXT_COM_VPN_ORIGIN 0x0005 /* OSPF Domain ID / VPN of Origin - draft-rosen-vpns-ospf-bgp-mpls */
392 #define BGP_EXT_COM_VPN_ORIGIN2 0x0105 /* duplicate - keep for backwards compatability */
393 #define BGP_EXT_COM_VPN_ORIGIN3 0x0205 /* duplicate - keep for backwards compatability */
394 #define BGP_EXT_COM_VPN_ORIGIN4 0x8005 /* duplicate - keep for backwards compatability */
395
396 #define BGP_EXT_COM_OSPF_RTYPE 0x0306 /* OSPF Route Type,Format Area(4B):RouteType(1B):Options(1B) */
397 #define BGP_EXT_COM_OSPF_RTYPE2 0x8000 /* duplicate - keep for backwards compatability */
398
399 #define BGP_EXT_COM_OSPF_RID 0x0107 /* OSPF Router ID,Format RouterID(4B):Unused(2B) */
400 #define BGP_EXT_COM_OSPF_RID2 0x8001 /* duplicate - keep for backwards compatability */
401
402 #define BGP_EXT_COM_L2INFO 0x800a /* draft-kompella-ppvpn-l2vpn */
403
404 #define BGP_EXT_COM_SOURCE_AS 0x0009 /* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */
405 #define BGP_EXT_COM_VRF_RT_IMP 0x010a /* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */
406
407 /* http://www.cisco.com/en/US/tech/tk436/tk428/technologies_tech_note09186a00801eb09a.shtml */
408 #define BGP_EXT_COM_EIGRP_GEN 0x8800
409 #define BGP_EXT_COM_EIGRP_METRIC_AS_DELAY 0x8801
410 #define BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW 0x8802
411 #define BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU 0x8803
412 #define BGP_EXT_COM_EIGRP_EXT_REMAS_REMID 0x8804
413 #define BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC 0x8805
414
415 static struct tok bgp_extd_comm_flag_values[] = {
416 { 0x8000, "vendor-specific"},
417 { 0x4000, "non-transitive"},
418 { 0, NULL},
419 };
420
421 static struct tok bgp_extd_comm_subtype_values[] = {
422 { BGP_EXT_COM_RT_0, "target"},
423 { BGP_EXT_COM_RT_1, "target"},
424 { BGP_EXT_COM_RT_2, "target"},
425 { BGP_EXT_COM_RO_0, "origin"},
426 { BGP_EXT_COM_RO_1, "origin"},
427 { BGP_EXT_COM_RO_2, "origin"},
428 { BGP_EXT_COM_LINKBAND, "link-BW"},
429 { BGP_EXT_COM_VPN_ORIGIN, "ospf-domain"},
430 { BGP_EXT_COM_VPN_ORIGIN2, "ospf-domain"},
431 { BGP_EXT_COM_VPN_ORIGIN3, "ospf-domain"},
432 { BGP_EXT_COM_VPN_ORIGIN4, "ospf-domain"},
433 { BGP_EXT_COM_OSPF_RTYPE, "ospf-route-type"},
434 { BGP_EXT_COM_OSPF_RTYPE2, "ospf-route-type"},
435 { BGP_EXT_COM_OSPF_RID, "ospf-router-id"},
436 { BGP_EXT_COM_OSPF_RID2, "ospf-router-id"},
437 { BGP_EXT_COM_L2INFO, "layer2-info"},
438 { BGP_EXT_COM_EIGRP_GEN , "eigrp-general-route (flag, tag)" },
439 { BGP_EXT_COM_EIGRP_METRIC_AS_DELAY , "eigrp-route-metric (AS, delay)" },
440 { BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW , "eigrp-route-metric (reliability, nexthop, bandwidth)" },
441 { BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU , "eigrp-route-metric (load, MTU)" },
442 { BGP_EXT_COM_EIGRP_EXT_REMAS_REMID , "eigrp-external-route (remote-AS, remote-ID)" },
443 { BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC , "eigrp-external-route (remote-proto, remote-metric)" },
444 { BGP_EXT_COM_SOURCE_AS, "source-AS" },
445 { BGP_EXT_COM_VRF_RT_IMP, "vrf-route-import"},
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 /*
539 * bgp_vpn_ip_print
540 *
541 * print an ipv4 or ipv6 address into a buffer dependend on address length.
542 */
543 static char *
544 bgp_vpn_ip_print (const u_char *pptr, u_int addr_length) {
545
546 /* worst case string is s fully formatted v6 address */
547 static char addr[sizeof("1234:5678:89ab:cdef:1234:5678:89ab:cdef")];
548 char *pos = addr;
549
550 switch(addr_length) {
551 case (sizeof(struct in_addr) << 3): /* 32 */
552 TCHECK2(pptr[0], sizeof(struct in_addr));
553 snprintf(pos, sizeof(addr), "%s", ipaddr_string(pptr));
554 break;
555 #ifdef INET6
556 case (sizeof(struct in6_addr) << 3): /* 128 */
557 TCHECK2(pptr[0], sizeof(struct in6_addr));
558 snprintf(pos, sizeof(addr), "%s", ip6addr_string(pptr));
559 break;
560 #endif
561 default:
562 snprintf(pos, sizeof(addr), "bogus address length %u", addr_length);
563 break;
564 }
565 pos += strlen(pos);
566
567 trunc:
568 *(pos) = '\0';
569 return (addr);
570 }
571
572 /*
573 * bgp_vpn_sg_print
574 *
575 * print an multicast s,g entry into a buffer.
576 * the s,g entry is encoded like this.
577 *
578 * +-----------------------------------+
579 * | Multicast Source Length (1 octet) |
580 * +-----------------------------------+
581 * | Multicast Source (Variable) |
582 * +-----------------------------------+
583 * | Multicast Group Length (1 octet) |
584 * +-----------------------------------+
585 * | Multicast Group (Variable) |
586 * +-----------------------------------+
587 *
588 * return the number of bytes read from the wire.
589 */
590 static int
591 bgp_vpn_sg_print (const u_char *pptr, char *buf, u_int buflen) {
592
593 u_int8_t addr_length;
594 u_int total_length, offset;
595
596 total_length = 0;
597
598 /* Source address length, encoded in bits */
599 TCHECK2(pptr[0], 1);
600 addr_length = *pptr++;
601
602 /* Source address */
603 TCHECK2(pptr[0], (addr_length >> 3));
604 total_length += (addr_length >> 3) + 1;
605 offset = strlen(buf);
606 if (addr_length) {
607 snprintf(buf + offset, buflen - offset, ", Source %s",
608 bgp_vpn_ip_print(pptr, addr_length));
609 pptr += (addr_length >> 3);
610 }
611
612 /* Group address length, encoded in bits */
613 TCHECK2(pptr[0], 1);
614 addr_length = *pptr++;
615
616 /* Group address */
617 TCHECK2(pptr[0], (addr_length >> 3));
618 total_length += (addr_length >> 3) + 1;
619 offset = strlen(buf);
620 if (addr_length) {
621 snprintf(buf + offset, buflen - offset, ", Group %s",
622 bgp_vpn_ip_print(pptr, addr_length));
623 pptr += (addr_length >> 3);
624 }
625
626 trunc:
627 return (total_length);
628 }
629
630
631 /* RDs and RTs share the same semantics
632 * we use bgp_vpn_rd_print for
633 * printing route targets inside a NLRI */
634 char *
635 bgp_vpn_rd_print (const u_char *pptr) {
636
637 /* allocate space for the largest possible string */
638 static char rd[sizeof("xxxxxxxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")];
639 char *pos = rd;
640
641 /* ok lets load the RD format */
642 switch (EXTRACT_16BITS(pptr)) {
643
644 /* 2-byte-AS:number fmt*/
645 case 0:
646 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u (= %u.%u.%u.%u)",
647 EXTRACT_16BITS(pptr+2),
648 EXTRACT_32BITS(pptr+4),
649 *(pptr+4), *(pptr+5), *(pptr+6), *(pptr+7));
650 break;
651 /* IP-address:AS fmt*/
652
653 case 1:
654 snprintf(pos, sizeof(rd) - (pos - rd), "%u.%u.%u.%u:%u",
655 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
656 break;
657
658 /* 4-byte-AS:number fmt*/
659 case 2:
660 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u (%u.%u.%u.%u:%u)",
661 EXTRACT_32BITS(pptr+2), EXTRACT_16BITS(pptr+6),
662 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
663 break;
664 default:
665 snprintf(pos, sizeof(rd) - (pos - rd), "unknown RD format");
666 break;
667 }
668 pos += strlen(pos);
669 *(pos) = '\0';
670 return (rd);
671 }
672
673 static int
674 decode_rt_routing_info(const u_char *pptr, char *buf, u_int buflen)
675 {
676 u_int8_t route_target[8];
677 u_int plen;
678
679 TCHECK(pptr[0]);
680 plen = pptr[0]; /* get prefix length */
681
682 if (0 == plen)
683 return 1; /* default route target */
684
685 if (32 > plen)
686 return -1;
687
688 plen-=32; /* adjust prefix length */
689
690 if (64 < plen)
691 return -1;
692
693 memset(&route_target, 0, sizeof(route_target));
694 TCHECK2(pptr[1], (plen + 7) / 8);
695 memcpy(&route_target, &pptr[1], (plen + 7) / 8);
696 if (plen % 8) {
697 ((u_char *)&route_target)[(plen + 7) / 8 - 1] &=
698 ((0xff00 >> (plen % 8)) & 0xff);
699 }
700 snprintf(buf, buflen, "origin AS: %u, route target %s",
701 EXTRACT_32BITS(pptr+1),
702 bgp_vpn_rd_print((u_char *)&route_target));
703
704 return 5 + (plen + 7) / 8;
705
706 trunc:
707 return -2;
708 }
709
710 static int
711 decode_labeled_vpn_prefix4(const u_char *pptr, char *buf, u_int buflen)
712 {
713 struct in_addr addr;
714 u_int plen;
715
716 TCHECK(pptr[0]);
717 plen = pptr[0]; /* get prefix length */
718
719 if ((24+64) > plen)
720 return -1;
721
722 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
723
724 if (32 < plen)
725 return -1;
726
727 memset(&addr, 0, sizeof(addr));
728 TCHECK2(pptr[12], (plen + 7) / 8);
729 memcpy(&addr, &pptr[12], (plen + 7) / 8);
730 if (plen % 8) {
731 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
732 ((0xff00 >> (plen % 8)) & 0xff);
733 }
734 /* the label may get offsetted by 4 bits so lets shift it right */
735 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
736 bgp_vpn_rd_print(pptr+4),
737 getname((u_char *)&addr),
738 plen,
739 EXTRACT_24BITS(pptr+1)>>4,
740 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
741
742 return 12 + (plen + 7) / 8;
743
744 trunc:
745 return -2;
746 }
747
748 #define BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI 1
749 #define BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI 2
750 #define BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI 3
751 #define BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF 4
752 #define BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE 5
753 #define BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN 6
754 #define BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN 7
755
756 static struct tok bgp_multicast_vpn_route_type_values[] = {
757 { BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI, "Intra-AS I-PMSI"},
758 { BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI, "Inter-AS I-PMSI"},
759 { BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI, "S-PMSI"},
760 { BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF, "Intra-AS Segment-Leaf"},
761 { BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE, "Source-Active"},
762 { BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN, "Shared Tree Join"},
763 { BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN, "Source Tree Join"},
764 };
765
766 static int
767 decode_multicast_vpn(const u_char *pptr, char *buf, u_int buflen)
768 {
769 u_int8_t route_type, route_length, addr_length, sg_length;
770 u_int offset;
771
772 TCHECK2(pptr[0], 2);
773 route_type = *pptr++;
774 route_length = *pptr++;
775
776 snprintf(buf, buflen, "Route-Type: %s (%u), length: %u",
777 tok2str(bgp_multicast_vpn_route_type_values,
778 "Unknown", route_type),
779 route_type, route_length);
780
781 switch(route_type) {
782 case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI:
783 TCHECK2(pptr[0], BGP_VPN_RD_LEN);
784 offset = strlen(buf);
785 snprintf(buf + offset, buflen - offset, ", RD: %s, Originator %s",
786 bgp_vpn_rd_print(pptr),
787 bgp_vpn_ip_print(pptr + BGP_VPN_RD_LEN,
788 (route_length - BGP_VPN_RD_LEN) << 3));
789 break;
790 case BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI:
791 TCHECK2(pptr[0], BGP_VPN_RD_LEN + 4);
792 offset = strlen(buf);
793 snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %u",
794 bgp_vpn_rd_print(pptr),
795 EXTRACT_32BITS(pptr + BGP_VPN_RD_LEN));
796 break;
797
798 case BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI:
799 TCHECK2(pptr[0], BGP_VPN_RD_LEN);
800 offset = strlen(buf);
801 snprintf(buf + offset, buflen - offset, ", RD: %s",
802 bgp_vpn_rd_print(pptr));
803 pptr += BGP_VPN_RD_LEN;
804
805 sg_length = bgp_vpn_sg_print(pptr, buf, buflen);
806 addr_length = route_length - sg_length;
807
808 TCHECK2(pptr[0], addr_length);
809 offset = strlen(buf);
810 snprintf(buf + offset, buflen - offset, ", Originator %s",
811 bgp_vpn_ip_print(pptr, addr_length << 3));
812 break;
813
814 case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE:
815 TCHECK2(pptr[0], BGP_VPN_RD_LEN);
816 offset = strlen(buf);
817 snprintf(buf + offset, buflen - offset, ", RD: %s",
818 bgp_vpn_rd_print(pptr));
819 pptr += BGP_VPN_RD_LEN;
820
821 bgp_vpn_sg_print(pptr, buf, buflen);
822 break;
823
824 case BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN: /* fall through */
825 case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN:
826 TCHECK2(pptr[0], BGP_VPN_RD_LEN);
827 offset = strlen(buf);
828 snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %u",
829 bgp_vpn_rd_print(pptr),
830 EXTRACT_32BITS(pptr + BGP_VPN_RD_LEN));
831 pptr += BGP_VPN_RD_LEN;
832
833 bgp_vpn_sg_print(pptr, buf, buflen);
834 break;
835
836 /*
837 * no per route-type printing yet.
838 */
839 case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF:
840 default:
841 break;
842 }
843
844 return route_length + 2;
845
846 trunc:
847 return -2;
848 }
849
850 /*
851 * As I remember, some versions of systems have an snprintf() that
852 * returns -1 if the buffer would have overflowed. If the return
853 * value is negative, set buflen to 0, to indicate that we've filled
854 * the buffer up.
855 *
856 * If the return value is greater than buflen, that means that
857 * the buffer would have overflowed; again, set buflen to 0 in
858 * that case.
859 */
860 #define UPDATE_BUF_BUFLEN(buf, buflen, strlen) \
861 if (strlen<0) \
862 buflen=0; \
863 else if ((u_int)strlen>buflen) \
864 buflen=0; \
865 else { \
866 buflen-=strlen; \
867 buf+=strlen; \
868 }
869
870 static int
871 decode_labeled_vpn_l2(const u_char *pptr, char *buf, u_int buflen)
872 {
873 int plen,tlen,strlen,tlv_type,tlv_len,ttlv_len;
874
875 TCHECK2(pptr[0], 2);
876 plen=EXTRACT_16BITS(pptr);
877 tlen=plen;
878 pptr+=2;
879 TCHECK2(pptr[0],15);
880 buf[0]='\0';
881 strlen=snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u",
882 bgp_vpn_rd_print(pptr),
883 EXTRACT_16BITS(pptr+8),
884 EXTRACT_16BITS(pptr+10),
885 EXTRACT_24BITS(pptr+12)>>4); /* the label is offsetted by 4 bits so lets shift it right */
886 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
887 pptr+=15;
888 tlen-=15;
889
890 /* ok now the variable part - lets read out TLVs*/
891 while (tlen>0) {
892 if (tlen < 3)
893 return -1;
894 TCHECK2(pptr[0], 3);
895 tlv_type=*pptr++;
896 tlv_len=EXTRACT_16BITS(pptr);
897 ttlv_len=tlv_len;
898 pptr+=2;
899
900 switch(tlv_type) {
901 case 1:
902 if (buflen!=0) {
903 strlen=snprintf(buf,buflen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
904 tlv_type,
905 tlv_len);
906 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
907 }
908 ttlv_len=ttlv_len/8+1; /* how many bytes do we need to read ? */
909 while (ttlv_len>0) {
910 TCHECK(pptr[0]);
911 if (buflen!=0) {
912 strlen=snprintf(buf,buflen, "%02x",*pptr++);
913 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
914 }
915 ttlv_len--;
916 }
917 break;
918 default:
919 if (buflen!=0) {
920 strlen=snprintf(buf,buflen, "\n\t\tunknown TLV #%u, length: %u",
921 tlv_type,
922 tlv_len);
923 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
924 }
925 break;
926 }
927 tlen-=(tlv_len<<3); /* the tlv-length is expressed in bits so lets shift it right */
928 }
929 return plen+2;
930
931 trunc:
932 return -2;
933 }
934
935 #ifdef INET6
936 int
937 decode_prefix6(const u_char *pd, char *buf, u_int buflen)
938 {
939 struct in6_addr addr;
940 u_int plen;
941
942 TCHECK(pd[0]);
943 plen = pd[0];
944 if (128 < plen)
945 return -1;
946
947 memset(&addr, 0, sizeof(addr));
948 TCHECK2(pd[1], (plen + 7) / 8);
949 memcpy(&addr, &pd[1], (plen + 7) / 8);
950 if (plen % 8) {
951 addr.s6_addr[(plen + 7) / 8 - 1] &=
952 ((0xff00 >> (plen % 8)) & 0xff);
953 }
954 snprintf(buf, buflen, "%s/%d", getname6((u_char *)&addr), plen);
955 return 1 + (plen + 7) / 8;
956
957 trunc:
958 return -2;
959 }
960
961 static int
962 decode_labeled_prefix6(const u_char *pptr, char *buf, u_int buflen)
963 {
964 struct in6_addr addr;
965 u_int plen;
966
967 TCHECK(pptr[0]);
968 plen = pptr[0]; /* get prefix length */
969
970 if (24 > plen)
971 return -1;
972
973 plen-=24; /* adjust prefixlen - labellength */
974
975 if (128 < plen)
976 return -1;
977
978 memset(&addr, 0, sizeof(addr));
979 TCHECK2(pptr[4], (plen + 7) / 8);
980 memcpy(&addr, &pptr[4], (plen + 7) / 8);
981 if (plen % 8) {
982 addr.s6_addr[(plen + 7) / 8 - 1] &=
983 ((0xff00 >> (plen % 8)) & 0xff);
984 }
985 /* the label may get offsetted by 4 bits so lets shift it right */
986 snprintf(buf, buflen, "%s/%d, label:%u %s",
987 getname6((u_char *)&addr),
988 plen,
989 EXTRACT_24BITS(pptr+1)>>4,
990 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
991
992 return 4 + (plen + 7) / 8;
993
994 trunc:
995 return -2;
996 }
997
998 static int
999 decode_labeled_vpn_prefix6(const u_char *pptr, char *buf, u_int buflen)
1000 {
1001 struct in6_addr addr;
1002 u_int plen;
1003
1004 TCHECK(pptr[0]);
1005 plen = pptr[0]; /* get prefix length */
1006
1007 if ((24+64) > plen)
1008 return -1;
1009
1010 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
1011
1012 if (128 < plen)
1013 return -1;
1014
1015 memset(&addr, 0, sizeof(addr));
1016 TCHECK2(pptr[12], (plen + 7) / 8);
1017 memcpy(&addr, &pptr[12], (plen + 7) / 8);
1018 if (plen % 8) {
1019 addr.s6_addr[(plen + 7) / 8 - 1] &=
1020 ((0xff00 >> (plen % 8)) & 0xff);
1021 }
1022 /* the label may get offsetted by 4 bits so lets shift it right */
1023 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
1024 bgp_vpn_rd_print(pptr+4),
1025 getname6((u_char *)&addr),
1026 plen,
1027 EXTRACT_24BITS(pptr+1)>>4,
1028 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
1029
1030 return 12 + (plen + 7) / 8;
1031
1032 trunc:
1033 return -2;
1034 }
1035 #endif
1036
1037 static int
1038 decode_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
1039 {
1040 u_int8_t addr[19];
1041 u_int plen;
1042
1043 TCHECK(pptr[0]);
1044 plen = pptr[0]; /* get prefix length */
1045
1046 if (152 < plen)
1047 return -1;
1048
1049 memset(&addr, 0, sizeof(addr));
1050 TCHECK2(pptr[4], (plen + 7) / 8);
1051 memcpy(&addr, &pptr[4], (plen + 7) / 8);
1052 if (plen % 8) {
1053 addr[(plen + 7) / 8 - 1] &=
1054 ((0xff00 >> (plen % 8)) & 0xff);
1055 }
1056 snprintf(buf, buflen, "%s/%d",
1057 isonsap_string(addr,(plen + 7) / 8),
1058 plen);
1059
1060 return 1 + (plen + 7) / 8;
1061
1062 trunc:
1063 return -2;
1064 }
1065
1066 static int
1067 decode_labeled_vpn_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
1068 {
1069 u_int8_t addr[19];
1070 u_int plen;
1071
1072 TCHECK(pptr[0]);
1073 plen = pptr[0]; /* get prefix length */
1074
1075 if ((24+64) > plen)
1076 return -1;
1077
1078 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
1079
1080 if (152 < plen)
1081 return -1;
1082
1083 memset(&addr, 0, sizeof(addr));
1084 TCHECK2(pptr[12], (plen + 7) / 8);
1085 memcpy(&addr, &pptr[12], (plen + 7) / 8);
1086 if (plen % 8) {
1087 addr[(plen + 7) / 8 - 1] &=
1088 ((0xff00 >> (plen % 8)) & 0xff);
1089 }
1090 /* the label may get offsetted by 4 bits so lets shift it right */
1091 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
1092 bgp_vpn_rd_print(pptr+4),
1093 isonsap_string(addr,(plen + 7) / 8),
1094 plen,
1095 EXTRACT_24BITS(pptr+1)>>4,
1096 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
1097
1098 return 12 + (plen + 7) / 8;
1099
1100 trunc:
1101 return -2;
1102 }
1103
1104 /*
1105 * Check for 4-byte ASN's, as per RFC 4893.
1106 */
1107 static int
1108 check_asnbytes(const u_char *tptr, const u_char *mptr, int asnlen)
1109 {
1110 int *kptr;
1111
1112 while (tptr < mptr) {
1113 TCHECK(tptr[0]);
1114 kptr = bgp_as_path_segment_known;
1115 while (kptr[0] != 0) {
1116 if (kptr[0] == tptr[0])
1117 break;
1118 ++kptr;
1119 }
1120 if (kptr[0] == 0)
1121 goto trunc;
1122 TCHECK(tptr[1]);
1123 tptr += 2 + tptr[1] * asnlen;
1124 }
1125 if (tptr == mptr)
1126 return 1;
1127
1128 trunc:
1129 return 0;
1130 }
1131
1132 static int
1133 bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len)
1134 {
1135 int i;
1136 u_int16_t af;
1137 u_int8_t safi, snpa, nhlen;
1138 union { /* copy buffer for bandwidth values */
1139 float f;
1140 u_int32_t i;
1141 } bw;
1142 int advance;
1143 int tlen;
1144 const u_char *tptr;
1145 char buf[MAXHOSTNAMELEN + 100];
1146 char tokbuf[TOKBUFSIZE];
1147 int asn4bytes;
1148
1149 tptr = pptr;
1150 tlen=len;
1151
1152 switch (attr->bgpa_type) {
1153 case BGPTYPE_ORIGIN:
1154 if (len != 1)
1155 printf("invalid len");
1156 else {
1157 TCHECK(*tptr);
1158 printf("%s", tok2strbuf(bgp_origin_values,
1159 "Unknown Origin Typecode",
1160 tptr[0],
1161 tokbuf, sizeof(tokbuf)));
1162 }
1163 break;
1164
1165 case BGPTYPE_AS_PATH:
1166 if (len % 2) {
1167 printf("invalid len");
1168 break;
1169 }
1170 if (!len) {
1171 printf("empty");
1172 break;
1173 }
1174
1175 asn4bytes = 0;
1176 if (!check_asnbytes(tptr, pptr+len, 2) &&
1177 check_asnbytes(tptr, pptr+len, 4))
1178 asn4bytes = 1;
1179 while (tptr < pptr + len) {
1180 TCHECK(tptr[0]);
1181 printf("%s", tok2strbuf(bgp_as_path_segment_open_values,
1182 "?", tptr[0],
1183 tokbuf, sizeof(tokbuf)));
1184 TCHECK(tptr[1]);
1185 if (asn4bytes == 0) {
1186 for (i = 0; i < tptr[1] * 2; i += 2) {
1187 TCHECK2(tptr[2 + i], 2);
1188 printf("%u ", EXTRACT_16BITS(&tptr[2 + i]));
1189 }
1190 } else {
1191 for (i = 0; i < tptr[1] * 4; i += 4) {
1192 TCHECK2(tptr[2 + i], 4);
1193 printf("%u.%u ", EXTRACT_16BITS(&tptr[2 + i]), EXTRACT_16BITS(&tptr[4 + i]));
1194 }
1195 }
1196 TCHECK(tptr[0]);
1197 printf("%s", tok2strbuf(bgp_as_path_segment_close_values,
1198 "?", tptr[0],
1199 tokbuf, sizeof(tokbuf)));
1200 TCHECK(tptr[1]);
1201 if (asn4bytes == 0)
1202 tptr += 2 + tptr[1] * 2;
1203 else
1204 tptr += 2 + tptr[1] * 4;
1205 }
1206 break;
1207 case BGPTYPE_NEXT_HOP:
1208 if (len != 4)
1209 printf("invalid len");
1210 else {
1211 TCHECK2(tptr[0], 4);
1212 printf("%s", getname(tptr));
1213 }
1214 break;
1215 case BGPTYPE_MULTI_EXIT_DISC:
1216 case BGPTYPE_LOCAL_PREF:
1217 if (len != 4)
1218 printf("invalid len");
1219 else {
1220 TCHECK2(tptr[0], 4);
1221 printf("%u", EXTRACT_32BITS(tptr));
1222 }
1223 break;
1224 case BGPTYPE_ATOMIC_AGGREGATE:
1225 if (len != 0)
1226 printf("invalid len");
1227 break;
1228 case BGPTYPE_AGGREGATOR:
1229 if (len != 6) {
1230 printf("invalid len");
1231 break;
1232 }
1233 TCHECK2(tptr[0], 6);
1234 printf(" AS #%u, origin %s", EXTRACT_16BITS(tptr),
1235 getname(tptr + 2));
1236 break;
1237 case BGPTYPE_COMMUNITIES:
1238 if (len % 4) {
1239 printf("invalid len");
1240 break;
1241 }
1242 while (tlen>0) {
1243 u_int32_t comm;
1244 TCHECK2(tptr[0], 4);
1245 comm = EXTRACT_32BITS(tptr);
1246 switch (comm) {
1247 case BGP_COMMUNITY_NO_EXPORT:
1248 printf(" NO_EXPORT");
1249 break;
1250 case BGP_COMMUNITY_NO_ADVERT:
1251 printf(" NO_ADVERTISE");
1252 break;
1253 case BGP_COMMUNITY_NO_EXPORT_SUBCONFED:
1254 printf(" NO_EXPORT_SUBCONFED");
1255 break;
1256 default:
1257 printf("%u:%u%s",
1258 (comm >> 16) & 0xffff,
1259 comm & 0xffff,
1260 (tlen>4) ? ", " : "");
1261 break;
1262 }
1263 tlen -=4;
1264 tptr +=4;
1265 }
1266 break;
1267 case BGPTYPE_ORIGINATOR_ID:
1268 if (len != 4) {
1269 printf("invalid len");
1270 break;
1271 }
1272 TCHECK2(tptr[0], 4);
1273 printf("%s",getname(tptr));
1274 break;
1275 case BGPTYPE_CLUSTER_LIST:
1276 if (len % 4) {
1277 printf("invalid len");
1278 break;
1279 }
1280 while (tlen>0) {
1281 TCHECK2(tptr[0], 4);
1282 printf("%s%s",
1283 getname(tptr),
1284 (tlen>4) ? ", " : "");
1285 tlen -=4;
1286 tptr +=4;
1287 }
1288 break;
1289 case BGPTYPE_MP_REACH_NLRI:
1290 TCHECK2(tptr[0], 3);
1291 af = EXTRACT_16BITS(tptr);
1292 safi = tptr[2];
1293
1294 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1295 tok2strbuf(af_values, "Unknown AFI", af,
1296 tokbuf, sizeof(tokbuf)),
1297 af,
1298 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1299 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1300 tokbuf, sizeof(tokbuf)),
1301 safi);
1302
1303 switch(af<<8 | safi) {
1304 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1305 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1306 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1307 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1308 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1309 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1310 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1311 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1312 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN):
1313 #ifdef INET6
1314 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1315 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1316 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1317 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1318 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1319 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1320 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1321 #endif
1322 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1323 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1324 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1325 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1326 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1327 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1328 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1329 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1330 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1331 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1332 break;
1333 default:
1334 TCHECK2(tptr[0], tlen);
1335 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1336 if (vflag <= 1)
1337 print_unknown_data(tptr,"\n\t ",tlen);
1338 goto done;
1339 break;
1340 }
1341
1342 tptr +=3;
1343
1344 TCHECK(tptr[0]);
1345 nhlen = tptr[0];
1346 tlen = nhlen;
1347 tptr++;
1348
1349 if (tlen) {
1350 printf("\n\t nexthop: ");
1351 while (tlen > 0) {
1352 switch(af<<8 | safi) {
1353 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1354 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1355 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1356 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1357 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1358 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN):
1359 if (tlen < (int)sizeof(struct in_addr)) {
1360 printf("invalid len");
1361 tlen = 0;
1362 } else {
1363 TCHECK2(tptr[0], sizeof(struct in_addr));
1364 printf("%s",getname(tptr));
1365 tlen -= sizeof(struct in_addr);
1366 tptr += sizeof(struct in_addr);
1367 }
1368 break;
1369 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1370 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1371 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1372 if (tlen < (int)(sizeof(struct in_addr)+BGP_VPN_RD_LEN)) {
1373 printf("invalid len");
1374 tlen = 0;
1375 } else {
1376 TCHECK2(tptr[0], sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1377 printf("RD: %s, %s",
1378 bgp_vpn_rd_print(tptr),
1379 getname(tptr+BGP_VPN_RD_LEN));
1380 tlen -= (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1381 tptr += (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1382 }
1383 break;
1384 #ifdef INET6
1385 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1386 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1387 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1388 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1389 if (tlen < (int)sizeof(struct in6_addr)) {
1390 printf("invalid len");
1391 tlen = 0;
1392 } else {
1393 TCHECK2(tptr[0], sizeof(struct in6_addr));
1394 printf("%s", getname6(tptr));
1395 tlen -= sizeof(struct in6_addr);
1396 tptr += sizeof(struct in6_addr);
1397 }
1398 break;
1399 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1400 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1401 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1402 if (tlen < (int)(sizeof(struct in6_addr)+BGP_VPN_RD_LEN)) {
1403 printf("invalid len");
1404 tlen = 0;
1405 } else {
1406 TCHECK2(tptr[0], sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1407 printf("RD: %s, %s",
1408 bgp_vpn_rd_print(tptr),
1409 getname6(tptr+BGP_VPN_RD_LEN));
1410 tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1411 tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1412 }
1413 break;
1414 #endif
1415 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1416 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1417 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1418 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1419 if (tlen < (int)sizeof(struct in_addr)) {
1420 printf("invalid len");
1421 tlen = 0;
1422 } else {
1423 TCHECK2(tptr[0], sizeof(struct in_addr));
1424 printf("%s", getname(tptr));
1425 tlen -= (sizeof(struct in_addr));
1426 tptr += (sizeof(struct in_addr));
1427 }
1428 break;
1429 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1430 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1431 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1432 TCHECK2(tptr[0], tlen);
1433 printf("%s",isonsap_string(tptr,tlen));
1434 tptr += tlen;
1435 tlen = 0;
1436 break;
1437
1438 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1439 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1440 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1441 if (tlen < BGP_VPN_RD_LEN+1) {
1442 printf("invalid len");
1443 tlen = 0;
1444 } else {
1445 TCHECK2(tptr[0], tlen);
1446 printf("RD: %s, %s",
1447 bgp_vpn_rd_print(tptr),
1448 isonsap_string(tptr+BGP_VPN_RD_LEN,tlen-BGP_VPN_RD_LEN));
1449 /* rfc986 mapped IPv4 address ? */
1450 if (EXTRACT_32BITS(tptr+BGP_VPN_RD_LEN) == 0x47000601)
1451 printf(" = %s", getname(tptr+BGP_VPN_RD_LEN+4));
1452 #ifdef INET6
1453 /* rfc1888 mapped IPv6 address ? */
1454 else if (EXTRACT_24BITS(tptr+BGP_VPN_RD_LEN) == 0x350000)
1455 printf(" = %s", getname6(tptr+BGP_VPN_RD_LEN+3));
1456 #endif
1457 tptr += tlen;
1458 tlen = 0;
1459 }
1460 break;
1461 default:
1462 TCHECK2(tptr[0], tlen);
1463 printf("no AFI %u/SAFI %u decoder",af,safi);
1464 if (vflag <= 1)
1465 print_unknown_data(tptr,"\n\t ",tlen);
1466 tptr += tlen;
1467 tlen = 0;
1468 goto done;
1469 break;
1470 }
1471 }
1472 }
1473 printf(", nh-length: %u", nhlen);
1474 tptr += tlen;
1475
1476 TCHECK(tptr[0]);
1477 snpa = tptr[0];
1478 tptr++;
1479
1480 if (snpa) {
1481 printf("\n\t %u SNPA", snpa);
1482 for (/*nothing*/; snpa > 0; snpa--) {
1483 TCHECK(tptr[0]);
1484 printf("\n\t %d bytes", tptr[0]);
1485 tptr += tptr[0] + 1;
1486 }
1487 } else {
1488 printf(", no SNPA");
1489 }
1490
1491 while (len - (tptr - pptr) > 0) {
1492 switch (af<<8 | safi) {
1493 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1494 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1495 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1496 advance = decode_prefix4(tptr, buf, sizeof(buf));
1497 if (advance == -1)
1498 printf("\n\t (illegal prefix length)");
1499 else if (advance == -2)
1500 goto trunc;
1501 else
1502 printf("\n\t %s", buf);
1503 break;
1504 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1505 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1506 if (advance == -1)
1507 printf("\n\t (illegal prefix length)");
1508 else if (advance == -2)
1509 goto trunc;
1510 else
1511 printf("\n\t %s", buf);
1512 break;
1513 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1514 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1515 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1516 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1517 if (advance == -1)
1518 printf("\n\t (illegal prefix length)");
1519 else if (advance == -2)
1520 goto trunc;
1521 else
1522 printf("\n\t %s", buf);
1523 break;
1524 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1525 advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1526 if (advance == -1)
1527 printf("\n\t (illegal prefix length)");
1528 else if (advance == -2)
1529 goto trunc;
1530 else
1531 printf("\n\t %s", buf);
1532 break;
1533 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */
1534 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN):
1535 advance = decode_multicast_vpn(tptr, buf, sizeof(buf));
1536 if (advance == -1)
1537 printf("\n\t (illegal prefix length)");
1538 else if (advance == -2)
1539 goto trunc;
1540 else
1541 printf("\n\t %s", buf);
1542 break;
1543 #ifdef INET6
1544 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1545 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1546 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1547 advance = decode_prefix6(tptr, buf, sizeof(buf));
1548 if (advance == -1)
1549 printf("\n\t (illegal prefix length)");
1550 else if (advance == -2)
1551 goto trunc;
1552 else
1553 printf("\n\t %s", buf);
1554 break;
1555 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1556 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1557 if (advance == -1)
1558 printf("\n\t (illegal prefix length)");
1559 else if (advance == -2)
1560 goto trunc;
1561 else
1562 printf("\n\t %s", buf);
1563 break;
1564 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1565 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1566 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1567 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1568 if (advance == -1)
1569 printf("\n\t (illegal prefix length)");
1570 else if (advance == -2)
1571 goto trunc;
1572 else
1573 printf("\n\t %s", buf);
1574 break;
1575 #endif
1576 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1577 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1578 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1579 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1580 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1581 if (advance == -1)
1582 printf("\n\t (illegal length)");
1583 else if (advance == -2)
1584 goto trunc;
1585 else
1586 printf("\n\t %s", buf);
1587 break;
1588 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1589 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1590 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1591 advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1592 if (advance == -1)
1593 printf("\n\t (illegal prefix length)");
1594 else if (advance == -2)
1595 goto trunc;
1596 else
1597 printf("\n\t %s", buf);
1598 break;
1599 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1600 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1601 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1602 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1603 if (advance == -1)
1604 printf("\n\t (illegal prefix length)");
1605 else if (advance == -2)
1606 goto trunc;
1607 else
1608 printf("\n\t %s", buf);
1609 break;
1610 default:
1611 TCHECK2(*tptr,tlen);
1612 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1613 if (vflag <= 1)
1614 print_unknown_data(tptr,"\n\t ",tlen);
1615 advance = 0;
1616 tptr = pptr + len;
1617 break;
1618 }
1619 if (advance < 0)
1620 break;
1621 tptr += advance;
1622 }
1623 done:
1624 break;
1625
1626 case BGPTYPE_MP_UNREACH_NLRI:
1627 TCHECK2(tptr[0], BGP_MP_NLRI_MINSIZE);
1628 af = EXTRACT_16BITS(tptr);
1629 safi = tptr[2];
1630
1631 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1632 tok2strbuf(af_values, "Unknown AFI", af,
1633 tokbuf, sizeof(tokbuf)),
1634 af,
1635 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1636 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1637 tokbuf, sizeof(tokbuf)),
1638 safi);
1639
1640 if (len == BGP_MP_NLRI_MINSIZE)
1641 printf("\n\t End-of-Rib Marker (empty NLRI)");
1642
1643 tptr += 3;
1644
1645 while (len - (tptr - pptr) > 0) {
1646 switch (af<<8 | safi) {
1647 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1648 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1649 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1650 advance = decode_prefix4(tptr, buf, sizeof(buf));
1651 if (advance == -1)
1652 printf("\n\t (illegal prefix length)");
1653 else if (advance == -2)
1654 goto trunc;
1655 else
1656 printf("\n\t %s", buf);
1657 break;
1658 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1659 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1660 if (advance == -1)
1661 printf("\n\t (illegal prefix length)");
1662 else if (advance == -2)
1663 goto trunc;
1664 else
1665 printf("\n\t %s", buf);
1666 break;
1667 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1668 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1669 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1670 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1671 if (advance == -1)
1672 printf("\n\t (illegal prefix length)");
1673 else if (advance == -2)
1674 goto trunc;
1675 else
1676 printf("\n\t %s", buf);
1677 break;
1678 #ifdef INET6
1679 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1680 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1681 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1682 advance = decode_prefix6(tptr, buf, sizeof(buf));
1683 if (advance == -1)
1684 printf("\n\t (illegal prefix length)");
1685 else if (advance == -2)
1686 goto trunc;
1687 else
1688 printf("\n\t %s", buf);
1689 break;
1690 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1691 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1692 if (advance == -1)
1693 printf("\n\t (illegal prefix length)");
1694 else if (advance == -2)
1695 goto trunc;
1696 else
1697 printf("\n\t %s", buf);
1698 break;
1699 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1700 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1701 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1702 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1703 if (advance == -1)
1704 printf("\n\t (illegal prefix length)");
1705 else if (advance == -2)
1706 goto trunc;
1707 else
1708 printf("\n\t %s", buf);
1709 break;
1710 #endif
1711 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1712 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1713 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1714 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1715 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1716 if (advance == -1)
1717 printf("\n\t (illegal length)");
1718 else if (advance == -2)
1719 goto trunc;
1720 else
1721 printf("\n\t %s", buf);
1722 break;
1723 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1724 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1725 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1726 advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1727 if (advance == -1)
1728 printf("\n\t (illegal prefix length)");
1729 else if (advance == -2)
1730 goto trunc;
1731 else
1732 printf("\n\t %s", buf);
1733 break;
1734 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1735 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1736 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1737 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1738 if (advance == -1)
1739 printf("\n\t (illegal prefix length)");
1740 else if (advance == -2)
1741 goto trunc;
1742 else
1743 printf("\n\t %s", buf);
1744 break;
1745 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */
1746 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN):
1747 advance = decode_multicast_vpn(tptr, buf, sizeof(buf));
1748 if (advance == -1)
1749 printf("\n\t (illegal prefix length)");
1750 else if (advance == -2)
1751 goto trunc;
1752 else
1753 printf("\n\t %s", buf);
1754 break;
1755 default:
1756 TCHECK2(*(tptr-3),tlen);
1757 printf("no AFI %u / SAFI %u decoder",af,safi);
1758 if (vflag <= 1)
1759 print_unknown_data(tptr-3,"\n\t ",tlen);
1760 advance = 0;
1761 tptr = pptr + len;
1762 break;
1763 }
1764 if (advance < 0)
1765 break;
1766 tptr += advance;
1767 }
1768 break;
1769 case BGPTYPE_EXTD_COMMUNITIES:
1770 if (len % 8) {
1771 printf("invalid len");
1772 break;
1773 }
1774 while (tlen>0) {
1775 u_int16_t extd_comm;
1776
1777 TCHECK2(tptr[0], 2);
1778 extd_comm=EXTRACT_16BITS(tptr);
1779
1780 printf("\n\t %s (0x%04x), Flags [%s]",
1781 tok2strbuf(bgp_extd_comm_subtype_values,
1782 "unknown extd community typecode",
1783 extd_comm, tokbuf, sizeof(tokbuf)),
1784 extd_comm,
1785 bittok2str(bgp_extd_comm_flag_values, "none", extd_comm));
1786
1787 TCHECK2(*(tptr+2), 6);
1788 switch(extd_comm) {
1789 case BGP_EXT_COM_RT_0:
1790 case BGP_EXT_COM_RO_0:
1791 printf(": %u:%u (= %s)",
1792 EXTRACT_16BITS(tptr+2),
1793 EXTRACT_32BITS(tptr+4),
1794 getname(tptr+4));
1795 break;
1796 case BGP_EXT_COM_RT_1:
1797 case BGP_EXT_COM_RO_1:
1798 case BGP_EXT_COM_VRF_RT_IMP:
1799 printf(": %s:%u",
1800 getname(tptr+2),
1801 EXTRACT_16BITS(tptr+6));
1802 break;
1803 case BGP_EXT_COM_RT_2:
1804 case BGP_EXT_COM_RO_2:
1805 printf(": %u:%u",
1806 EXTRACT_32BITS(tptr+2),
1807 EXTRACT_16BITS(tptr+6));
1808 break;
1809 case BGP_EXT_COM_LINKBAND:
1810 bw.i = EXTRACT_32BITS(tptr+2);
1811 printf(": bandwidth: %.3f Mbps",
1812 bw.f*8/1000000);
1813 break;
1814 case BGP_EXT_COM_VPN_ORIGIN:
1815 case BGP_EXT_COM_VPN_ORIGIN2:
1816 case BGP_EXT_COM_VPN_ORIGIN3:
1817 case BGP_EXT_COM_VPN_ORIGIN4:
1818 case BGP_EXT_COM_OSPF_RID:
1819 case BGP_EXT_COM_OSPF_RID2:
1820 printf("%s", getname(tptr+2));
1821 break;
1822 case BGP_EXT_COM_OSPF_RTYPE:
1823 case BGP_EXT_COM_OSPF_RTYPE2:
1824 printf(": area:%s, router-type:%s, metric-type:%s%s",
1825 getname(tptr+2),
1826 tok2strbuf(bgp_extd_comm_ospf_rtype_values,
1827 "unknown (0x%02x)",
1828 *(tptr+6),
1829 tokbuf, sizeof(tokbuf)),
1830 (*(tptr+7) & BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "",
1831 ((*(tptr+6) == BGP_OSPF_RTYPE_EXT) || (*(tptr+6) == BGP_OSPF_RTYPE_NSSA)) ? "E1" : "");
1832 break;
1833 case BGP_EXT_COM_L2INFO:
1834 printf(": %s Control Flags [0x%02x]:MTU %u",
1835 tok2strbuf(l2vpn_encaps_values,
1836 "unknown encaps",
1837 *(tptr+2),
1838 tokbuf, sizeof(tokbuf)),
1839 *(tptr+3),
1840 EXTRACT_16BITS(tptr+4));
1841 break;
1842 case BGP_EXT_COM_SOURCE_AS:
1843 printf(": AS %u", EXTRACT_16BITS(tptr+2));
1844 break;
1845 default:
1846 TCHECK2(*tptr,8);
1847 print_unknown_data(tptr,"\n\t ",8);
1848 break;
1849 }
1850 tlen -=8;
1851 tptr +=8;
1852 }
1853 break;
1854
1855 case BGPTYPE_PMSI_TUNNEL:
1856 {
1857 u_int8_t tunnel_type, flags;
1858
1859 tunnel_type = *(tptr+1);
1860 flags = *tptr;
1861 tlen = len;
1862
1863 TCHECK2(tptr[0], 5);
1864 printf("\n\t Tunnel-type %s (%u), Flags [%s], MPLS Label %u",
1865 tok2str(bgp_pmsi_tunnel_values, "Unknown", tunnel_type),
1866 tunnel_type,
1867 bittok2str(bgp_pmsi_flag_values, "none", flags),
1868 EXTRACT_24BITS(tptr+2)>>4);
1869
1870 tptr +=5;
1871 tlen -= 5;
1872
1873 switch (tunnel_type) {
1874 case BGP_PMSI_TUNNEL_PIM_SM: /* fall through */
1875 case BGP_PMSI_TUNNEL_PIM_BIDIR:
1876 TCHECK2(tptr[0], 8);
1877 printf("\n\t Sender %s, P-Group %s",
1878 ipaddr_string(tptr),
1879 ipaddr_string(tptr+4));
1880 break;
1881
1882 case BGP_PMSI_TUNNEL_PIM_SSM:
1883 TCHECK2(tptr[0], 8);
1884 printf("\n\t Root-Node %s, P-Group %s",
1885 ipaddr_string(tptr),
1886 ipaddr_string(tptr+4));
1887 break;
1888 case BGP_PMSI_TUNNEL_INGRESS:
1889 TCHECK2(tptr[0], 4);
1890 printf("\n\t Tunnel-Endpoint %s",
1891 ipaddr_string(tptr));
1892 break;
1893 case BGP_PMSI_TUNNEL_LDP_P2MP: /* fall through */
1894 case BGP_PMSI_TUNNEL_LDP_MP2MP:
1895 TCHECK2(tptr[0], 8);
1896 printf("\n\t Root-Node %s, LSP-ID 0x%08x",
1897 ipaddr_string(tptr),
1898 EXTRACT_32BITS(tptr+4));
1899 break;
1900 case BGP_PMSI_TUNNEL_RSVP_P2MP:
1901 TCHECK2(tptr[0], 8);
1902 printf("\n\t Extended-Tunnel-ID %s, P2MP-ID 0x%08x",
1903 ipaddr_string(tptr),
1904 EXTRACT_32BITS(tptr+4));
1905 break;
1906 default:
1907 if (vflag <= 1) {
1908 print_unknown_data(tptr,"\n\t ",tlen);
1909 }
1910 }
1911 break;
1912 }
1913 case BGPTYPE_ATTR_SET:
1914 TCHECK2(tptr[0], 4);
1915 printf("\n\t Origin AS: %u", EXTRACT_32BITS(tptr));
1916 tptr+=4;
1917 len -=4;
1918
1919 while (len >= 2 ) {
1920 int alen;
1921 struct bgp_attr bgpa;
1922
1923 TCHECK2(tptr[0], sizeof(bgpa));
1924 memcpy(&bgpa, tptr, sizeof(bgpa));
1925 alen = bgp_attr_len(&bgpa);
1926 tptr += bgp_attr_off(&bgpa);
1927 len -= bgp_attr_off(&bgpa);
1928
1929 printf("\n\t %s (%u), length: %u",
1930 tok2strbuf(bgp_attr_values,
1931 "Unknown Attribute", bgpa.bgpa_type,
1932 tokbuf, sizeof(tokbuf)),
1933 bgpa.bgpa_type,
1934 alen);
1935
1936 if (bgpa.bgpa_flags) {
1937 printf(", Flags [%s%s%s%s",
1938 bgpa.bgpa_flags & 0x80 ? "O" : "",
1939 bgpa.bgpa_flags & 0x40 ? "T" : "",
1940 bgpa.bgpa_flags & 0x20 ? "P" : "",
1941 bgpa.bgpa_flags & 0x10 ? "E" : "");
1942 if (bgpa.bgpa_flags & 0xf)
1943 printf("+%x", bgpa.bgpa_flags & 0xf);
1944 printf("]: ");
1945 }
1946 /* FIXME check for recursion */
1947 if (!bgp_attr_print(&bgpa, tptr, alen))
1948 return 0;
1949 tptr += alen;
1950 len -= alen;
1951 }
1952 break;
1953
1954
1955 default:
1956 TCHECK2(*pptr,len);
1957 printf("\n\t no Attribute %u decoder",attr->bgpa_type); /* we have no decoder for the attribute */
1958 if (vflag <= 1)
1959 print_unknown_data(pptr,"\n\t ",len);
1960 break;
1961 }
1962 if (vflag > 1 && len) { /* omit zero length attributes*/
1963 TCHECK2(*pptr,len);
1964 print_unknown_data(pptr,"\n\t ",len);
1965 }
1966 return 1;
1967
1968 trunc:
1969 return 0;
1970 }
1971
1972 static void
1973 bgp_open_print(const u_char *dat, int length)
1974 {
1975 struct bgp_open bgpo;
1976 struct bgp_opt bgpopt;
1977 const u_char *opt;
1978 int i,cap_type,cap_len,tcap_len,cap_offset;
1979 char tokbuf[TOKBUFSIZE];
1980 char tokbuf2[TOKBUFSIZE];
1981
1982 TCHECK2(dat[0], BGP_OPEN_SIZE);
1983 memcpy(&bgpo, dat, BGP_OPEN_SIZE);
1984
1985 printf("\n\t Version %d, ", bgpo.bgpo_version);
1986 printf("my AS %u, ", ntohs(bgpo.bgpo_myas));
1987 printf("Holdtime %us, ", ntohs(bgpo.bgpo_holdtime));
1988 printf("ID %s", getname((u_char *)&bgpo.bgpo_id));
1989 printf("\n\t Optional parameters, length: %u", bgpo.bgpo_optlen);
1990
1991 /* some little sanity checking */
1992 if (length < bgpo.bgpo_optlen+BGP_OPEN_SIZE)
1993 return;
1994
1995 /* ugly! */
1996 opt = &((const struct bgp_open *)dat)->bgpo_optlen;
1997 opt++;
1998
1999 i = 0;
2000 while (i < bgpo.bgpo_optlen) {
2001 TCHECK2(opt[i], BGP_OPT_SIZE);
2002 memcpy(&bgpopt, &opt[i], BGP_OPT_SIZE);
2003 if (i + 2 + bgpopt.bgpopt_len > bgpo.bgpo_optlen) {
2004 printf("\n\t Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len);
2005 break;
2006 }
2007
2008 printf("\n\t Option %s (%u), length: %u",
2009 tok2strbuf(bgp_opt_values,"Unknown",
2010 bgpopt.bgpopt_type,
2011 tokbuf, sizeof(tokbuf)),
2012 bgpopt.bgpopt_type,
2013 bgpopt.bgpopt_len);
2014
2015 /* now lets decode the options we know*/
2016 switch(bgpopt.bgpopt_type) {
2017 case BGP_OPT_CAP:
2018 cap_type=opt[i+BGP_OPT_SIZE];
2019 cap_len=opt[i+BGP_OPT_SIZE+1];
2020 tcap_len=cap_len;
2021 printf("\n\t %s (%u), length: %u",
2022 tok2strbuf(bgp_capcode_values, "Unknown",
2023 cap_type, tokbuf, sizeof(tokbuf)),
2024 cap_type,
2025 cap_len);
2026 switch(cap_type) {
2027 case BGP_CAPCODE_MP:
2028 printf("\n\t\tAFI %s (%u), SAFI %s (%u)",
2029 tok2strbuf(af_values, "Unknown",
2030 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
2031 tokbuf, sizeof(tokbuf)),
2032 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
2033 tok2strbuf(bgp_safi_values, "Unknown",
2034 opt[i+BGP_OPT_SIZE+5],
2035 tokbuf, sizeof(tokbuf)),
2036 opt[i+BGP_OPT_SIZE+5]);
2037 break;
2038 case BGP_CAPCODE_RESTART:
2039 printf("\n\t\tRestart Flags: [%s], Restart Time %us",
2040 ((opt[i+BGP_OPT_SIZE+2])&0x80) ? "R" : "none",
2041 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2)&0xfff);
2042 tcap_len-=2;
2043 cap_offset=4;
2044 while(tcap_len>=4) {
2045 printf("\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s",
2046 tok2strbuf(af_values,"Unknown",
2047 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
2048 tokbuf, sizeof(tokbuf)),
2049 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
2050 tok2strbuf(bgp_safi_values,"Unknown",
2051 opt[i+BGP_OPT_SIZE+cap_offset+2],
2052 tokbuf2, sizeof(tokbuf2)),
2053 opt[i+BGP_OPT_SIZE+cap_offset+2],
2054 ((opt[i+BGP_OPT_SIZE+cap_offset+3])&0x80) ? "yes" : "no" );
2055 tcap_len-=4;
2056 cap_offset+=4;
2057 }
2058 break;
2059 case BGP_CAPCODE_RR:
2060 case BGP_CAPCODE_RR_CISCO:
2061 break;
2062 default:
2063 TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
2064 printf("\n\t\tno decoder for Capability %u",
2065 cap_type);
2066 if (vflag <= 1)
2067 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
2068 break;
2069 }
2070 if (vflag > 1) {
2071 TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
2072 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
2073 }
2074 break;
2075 case BGP_OPT_AUTH:
2076 default:
2077 printf("\n\t no decoder for option %u",
2078 bgpopt.bgpopt_type);
2079 break;
2080 }
2081
2082 i += BGP_OPT_SIZE + bgpopt.bgpopt_len;
2083 }
2084 return;
2085 trunc:
2086 printf("[|BGP]");
2087 }
2088
2089 static void
2090 bgp_update_print(const u_char *dat, int length)
2091 {
2092 struct bgp bgp;
2093 struct bgp_attr bgpa;
2094 const u_char *p;
2095 int len;
2096 int i;
2097 char tokbuf[TOKBUFSIZE];
2098
2099 TCHECK2(dat[0], BGP_SIZE);
2100 memcpy(&bgp, dat, BGP_SIZE);
2101 p = dat + BGP_SIZE; /*XXX*/
2102
2103 /* Unfeasible routes */
2104 len = EXTRACT_16BITS(p);
2105 if (len) {
2106 /*
2107 * Without keeping state from the original NLRI message,
2108 * it's not possible to tell if this a v4 or v6 route,
2109 * so only try to decode it if we're not v6 enabled.
2110 */
2111 #ifdef INET6
2112 printf("\n\t Withdrawn routes: %d bytes", len);
2113 #else
2114 char buf[MAXHOSTNAMELEN + 100];
2115 int wpfx;
2116
2117 TCHECK2(p[2], len);
2118 i = 2;
2119
2120 printf("\n\t Withdrawn routes:");
2121
2122 while(i < 2 + len) {
2123 wpfx = decode_prefix4(&p[i], buf, sizeof(buf));
2124 if (wpfx == -1) {
2125 printf("\n\t (illegal prefix length)");
2126 break;
2127 } else if (wpfx == -2)
2128 goto trunc;
2129 else {
2130 i += wpfx;
2131 printf("\n\t %s", buf);
2132 }
2133 }
2134 #endif
2135 }
2136 p += 2 + len;
2137
2138 TCHECK2(p[0], 2);
2139 len = EXTRACT_16BITS(p);
2140
2141 if (len == 0 && length == BGP_UPDATE_MINSIZE) {
2142 printf("\n\t End-of-Rib Marker (empty NLRI)");
2143 return;
2144 }
2145
2146 if (len) {
2147 /* do something more useful!*/
2148 i = 2;
2149 while (i < 2 + len) {
2150 int alen, aoff;
2151
2152 TCHECK2(p[i], sizeof(bgpa));
2153 memcpy(&bgpa, &p[i], sizeof(bgpa));
2154 alen = bgp_attr_len(&bgpa);
2155 aoff = bgp_attr_off(&bgpa);
2156
2157 printf("\n\t %s (%u), length: %u",
2158 tok2strbuf(bgp_attr_values, "Unknown Attribute",
2159 bgpa.bgpa_type,
2160 tokbuf, sizeof(tokbuf)),
2161 bgpa.bgpa_type,
2162 alen);
2163
2164 if (bgpa.bgpa_flags) {
2165 printf(", Flags [%s%s%s%s",
2166 bgpa.bgpa_flags & 0x80 ? "O" : "",
2167 bgpa.bgpa_flags & 0x40 ? "T" : "",
2168 bgpa.bgpa_flags & 0x20 ? "P" : "",
2169 bgpa.bgpa_flags & 0x10 ? "E" : "");
2170 if (bgpa.bgpa_flags & 0xf)
2171 printf("+%x", bgpa.bgpa_flags & 0xf);
2172 printf("]: ");
2173 }
2174 if (!bgp_attr_print(&bgpa, &p[i + aoff], alen))
2175 goto trunc;
2176 i += aoff + alen;
2177 }
2178 }
2179 p += 2 + len;
2180
2181 if (dat + length > p) {
2182 printf("\n\t Updated routes:");
2183 while (dat + length > p) {
2184 char buf[MAXHOSTNAMELEN + 100];
2185 i = decode_prefix4(p, buf, sizeof(buf));
2186 if (i == -1) {
2187 printf("\n\t (illegal prefix length)");
2188 break;
2189 } else if (i == -2)
2190 goto trunc;
2191 else {
2192 printf("\n\t %s", buf);
2193 p += i;
2194 }
2195 }
2196 }
2197 return;
2198 trunc:
2199 printf("[|BGP]");
2200 }
2201
2202 static void
2203 bgp_notification_print(const u_char *dat, int length)
2204 {
2205 struct bgp_notification bgpn;
2206 const u_char *tptr;
2207 char tokbuf[TOKBUFSIZE];
2208 char tokbuf2[TOKBUFSIZE];
2209
2210 TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
2211 memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
2212
2213 /* some little sanity checking */
2214 if (length<BGP_NOTIFICATION_SIZE)
2215 return;
2216
2217 printf(", %s (%u)",
2218 tok2strbuf(bgp_notify_major_values, "Unknown Error",
2219 bgpn.bgpn_major, tokbuf, sizeof(tokbuf)),
2220 bgpn.bgpn_major);
2221
2222 switch (bgpn.bgpn_major) {
2223
2224 case BGP_NOTIFY_MAJOR_MSG:
2225 printf(", subcode %s (%u)",
2226 tok2strbuf(bgp_notify_minor_msg_values, "Unknown",
2227 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2228 bgpn.bgpn_minor);
2229 break;
2230 case BGP_NOTIFY_MAJOR_OPEN:
2231 printf(", subcode %s (%u)",
2232 tok2strbuf(bgp_notify_minor_open_values, "Unknown",
2233 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2234 bgpn.bgpn_minor);
2235 break;
2236 case BGP_NOTIFY_MAJOR_UPDATE:
2237 printf(", subcode %s (%u)",
2238 tok2strbuf(bgp_notify_minor_update_values, "Unknown",
2239 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2240 bgpn.bgpn_minor);
2241 break;
2242 case BGP_NOTIFY_MAJOR_CAP:
2243 printf(" subcode %s (%u)",
2244 tok2strbuf(bgp_notify_minor_cap_values, "Unknown",
2245 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2246 bgpn.bgpn_minor);
2247 case BGP_NOTIFY_MAJOR_CEASE:
2248 printf(", subcode %s (%u)",
2249 tok2strbuf(bgp_notify_minor_cease_values, "Unknown",
2250 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2251 bgpn.bgpn_minor);
2252
2253 /* draft-ietf-idr-cease-subcode-02 mentions optionally 7 bytes
2254 * for the maxprefix subtype, which may contain AFI, SAFI and MAXPREFIXES
2255 */
2256 if(bgpn.bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= BGP_NOTIFICATION_SIZE + 7) {
2257 tptr = dat + BGP_NOTIFICATION_SIZE;
2258 TCHECK2(*tptr, 7);
2259 printf(", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
2260 tok2strbuf(af_values, "Unknown",
2261 EXTRACT_16BITS(tptr), tokbuf, sizeof(tokbuf)),
2262 EXTRACT_16BITS(tptr),
2263 tok2strbuf(bgp_safi_values, "Unknown", *(tptr+2),
2264 tokbuf2, sizeof(tokbuf)),
2265 *(tptr+2),
2266 EXTRACT_32BITS(tptr+3));
2267 }
2268 break;
2269 default:
2270 break;
2271 }
2272
2273 return;
2274 trunc:
2275 printf("[|BGP]");
2276 }
2277
2278 static void
2279 bgp_route_refresh_print(const u_char *pptr, int len) {
2280
2281 const struct bgp_route_refresh *bgp_route_refresh_header;
2282 char tokbuf[TOKBUFSIZE];
2283 char tokbuf2[TOKBUFSIZE];
2284
2285 TCHECK2(pptr[0], BGP_ROUTE_REFRESH_SIZE);
2286
2287 /* some little sanity checking */
2288 if (len<BGP_ROUTE_REFRESH_SIZE)
2289 return;
2290
2291 bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
2292
2293 printf("\n\t AFI %s (%u), SAFI %s (%u)",
2294 tok2strbuf(af_values,"Unknown",
2295 /* this stinks but the compiler pads the structure
2296 * weird */
2297 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
2298 tokbuf, sizeof(tokbuf)),
2299 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
2300 tok2strbuf(bgp_safi_values,"Unknown",
2301 bgp_route_refresh_header->safi,
2302 tokbuf2, sizeof(tokbuf2)),
2303 bgp_route_refresh_header->safi);
2304
2305 if (vflag > 1) {
2306 TCHECK2(*pptr, len);
2307 print_unknown_data(pptr,"\n\t ", len);
2308 }
2309
2310 return;
2311 trunc:
2312 printf("[|BGP]");
2313 }
2314
2315 static int
2316 bgp_header_print(const u_char *dat, int length)
2317 {
2318 struct bgp bgp;
2319 char tokbuf[TOKBUFSIZE];
2320
2321 TCHECK2(dat[0], BGP_SIZE);
2322 memcpy(&bgp, dat, BGP_SIZE);
2323 printf("\n\t%s Message (%u), length: %u",
2324 tok2strbuf(bgp_msg_values, "Unknown", bgp.bgp_type,
2325 tokbuf, sizeof(tokbuf)),
2326 bgp.bgp_type,
2327 length);
2328
2329 switch (bgp.bgp_type) {
2330 case BGP_OPEN:
2331 bgp_open_print(dat, length);
2332 break;
2333 case BGP_UPDATE:
2334 bgp_update_print(dat, length);
2335 break;
2336 case BGP_NOTIFICATION:
2337 bgp_notification_print(dat, length);
2338 break;
2339 case BGP_KEEPALIVE:
2340 break;
2341 case BGP_ROUTE_REFRESH:
2342 bgp_route_refresh_print(dat, length);
2343 break;
2344 default:
2345 /* we have no decoder for the BGP message */
2346 TCHECK2(*dat, length);
2347 printf("\n\t no Message %u decoder",bgp.bgp_type);
2348 print_unknown_data(dat,"\n\t ",length);
2349 break;
2350 }
2351 return 1;
2352 trunc:
2353 printf("[|BGP]");
2354 return 0;
2355 }
2356
2357 void
2358 bgp_print(const u_char *dat, int length)
2359 {
2360 const u_char *p;
2361 const u_char *ep;
2362 const u_char *start;
2363 const u_char marker[] = {
2364 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
2365 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
2366 };
2367 struct bgp bgp;
2368 u_int16_t hlen;
2369 char tokbuf[TOKBUFSIZE];
2370
2371 ep = dat + length;
2372 if (snapend < dat + length)
2373 ep = snapend;
2374
2375 printf(": BGP, length: %u",length);
2376
2377 if (vflag < 1) /* lets be less chatty */
2378 return;
2379
2380 p = dat;
2381 start = p;
2382 while (p < ep) {
2383 if (!TTEST2(p[0], 1))
2384 break;
2385 if (p[0] != 0xff) {
2386 p++;
2387 continue;
2388 }
2389
2390 if (!TTEST2(p[0], sizeof(marker)))
2391 break;
2392 if (memcmp(p, marker, sizeof(marker)) != 0) {
2393 p++;
2394 continue;
2395 }
2396
2397 /* found BGP header */
2398 TCHECK2(p[0], BGP_SIZE); /*XXX*/
2399 memcpy(&bgp, p, BGP_SIZE);
2400
2401 if (start != p)
2402 printf(" [|BGP]");
2403
2404 hlen = ntohs(bgp.bgp_len);
2405 if (hlen < BGP_SIZE) {
2406 printf("\n[|BGP Bogus header length %u < %u]", hlen,
2407 BGP_SIZE);
2408 break;
2409 }
2410
2411 if (TTEST2(p[0], hlen)) {
2412 if (!bgp_header_print(p, hlen))
2413 return;
2414 p += hlen;
2415 start = p;
2416 } else {
2417 printf("\n[|BGP %s]",
2418 tok2strbuf(bgp_msg_values,
2419 "Unknown Message Type",
2420 bgp.bgp_type,
2421 tokbuf, sizeof(tokbuf)));
2422 break;
2423 }
2424 }
2425
2426 return;
2427
2428 trunc:
2429 printf(" [|BGP]");
2430 }
2431
2432 /*
2433 * Local Variables:
2434 * c-style: whitesmith
2435 * c-basic-offset: 4
2436 * End:
2437 */
[mirror] the TCPdump network dissector