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update mvpn related cpodepoints as per IANA #84264 early assignment
[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 1.112 2007-06-20 13:29:50 hannes Exp $";
40 #endif
41
42 #include <tcpdump-stdinc.h>
43
44 #include <stdio.h>
45 #include <string.h>
46
47 #include "interface.h"
48 #include "decode_prefix.h"
49 #include "addrtoname.h"
50 #include "extract.h"
51 #include "bgp.h"
52 #include "af.h"
53 #include "l2vpn.h"
54
55 struct bgp {
56 u_int8_t bgp_marker[16];
57 u_int16_t bgp_len;
58 u_int8_t bgp_type;
59 };
60 #define BGP_SIZE 19 /* unaligned */
61
62 #define BGP_OPEN 1
63 #define BGP_UPDATE 2
64 #define BGP_NOTIFICATION 3
65 #define BGP_KEEPALIVE 4
66 #define BGP_ROUTE_REFRESH 5
67
68 static struct tok bgp_msg_values[] = {
69 { BGP_OPEN, "Open"},
70 { BGP_UPDATE, "Update"},
71 { BGP_NOTIFICATION, "Notification"},
72 { BGP_KEEPALIVE, "Keepalive"},
73 { BGP_ROUTE_REFRESH, "Route Refresh"},
74 { 0, NULL}
75 };
76
77 struct bgp_open {
78 u_int8_t bgpo_marker[16];
79 u_int16_t bgpo_len;
80 u_int8_t bgpo_type;
81 u_int8_t bgpo_version;
82 u_int16_t bgpo_myas;
83 u_int16_t bgpo_holdtime;
84 u_int32_t bgpo_id;
85 u_int8_t bgpo_optlen;
86 /* options should follow */
87 };
88 #define BGP_OPEN_SIZE 29 /* unaligned */
89
90 struct bgp_opt {
91 u_int8_t bgpopt_type;
92 u_int8_t bgpopt_len;
93 /* variable length */
94 };
95 #define BGP_OPT_SIZE 2 /* some compilers may pad to 4 bytes */
96
97 #define BGP_UPDATE_MINSIZE 23
98
99 struct bgp_notification {
100 u_int8_t bgpn_marker[16];
101 u_int16_t bgpn_len;
102 u_int8_t bgpn_type;
103 u_int8_t bgpn_major;
104 u_int8_t bgpn_minor;
105 };
106 #define BGP_NOTIFICATION_SIZE 21 /* unaligned */
107
108 struct bgp_route_refresh {
109 u_int8_t bgp_marker[16];
110 u_int16_t len;
111 u_int8_t type;
112 u_int8_t afi[2]; /* the compiler messes this structure up */
113 u_int8_t res; /* when doing misaligned sequences of int8 and int16 */
114 u_int8_t safi; /* afi should be int16 - so we have to access it using */
115 }; /* EXTRACT_16BITS(&bgp_route_refresh->afi) (sigh) */
116 #define BGP_ROUTE_REFRESH_SIZE 23
117
118 struct bgp_attr {
119 u_int8_t bgpa_flags;
120 u_int8_t bgpa_type;
121 union {
122 u_int8_t len;
123 u_int16_t elen;
124 } bgpa_len;
125 #define bgp_attr_len(p) \
126 (((p)->bgpa_flags & 0x10) ? \
127 EXTRACT_16BITS(&(p)->bgpa_len.elen) : (p)->bgpa_len.len)
128 #define bgp_attr_off(p) \
129 (((p)->bgpa_flags & 0x10) ? 4 : 3)
130 };
131
132 #define BGPTYPE_ORIGIN 1
133 #define BGPTYPE_AS_PATH 2
134 #define BGPTYPE_NEXT_HOP 3
135 #define BGPTYPE_MULTI_EXIT_DISC 4
136 #define BGPTYPE_LOCAL_PREF 5
137 #define BGPTYPE_ATOMIC_AGGREGATE 6
138 #define BGPTYPE_AGGREGATOR 7
139 #define BGPTYPE_COMMUNITIES 8 /* RFC1997 */
140 #define BGPTYPE_ORIGINATOR_ID 9 /* RFC1998 */
141 #define BGPTYPE_CLUSTER_LIST 10 /* RFC1998 */
142 #define BGPTYPE_DPA 11 /* draft-ietf-idr-bgp-dpa */
143 #define BGPTYPE_ADVERTISERS 12 /* RFC1863 */
144 #define BGPTYPE_RCID_PATH 13 /* RFC1863 */
145 #define BGPTYPE_MP_REACH_NLRI 14 /* RFC2283 */
146 #define BGPTYPE_MP_UNREACH_NLRI 15 /* RFC2283 */
147 #define BGPTYPE_EXTD_COMMUNITIES 16 /* draft-ietf-idr-bgp-ext-communities */
148 #define BGPTYPE_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 struct tok bgp_as_path_segment_open_values[] = {
182 { BGP_AS_SEQUENCE, ""},
183 { BGP_AS_SET, "{ "},
184 { BGP_CONFED_AS_SEQUENCE, "( "},
185 { BGP_CONFED_AS_SET, "({ "},
186 { 0, NULL}
187 };
188
189 static struct tok bgp_as_path_segment_close_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 #define BGP_OPT_AUTH 1
198 #define BGP_OPT_CAP 2
199
200
201 static struct tok bgp_opt_values[] = {
202 { BGP_OPT_AUTH, "Authentication Information"},
203 { BGP_OPT_CAP, "Capabilities Advertisement"},
204 { 0, NULL}
205 };
206
207 #define BGP_CAPCODE_MP 1
208 #define BGP_CAPCODE_RR 2
209 #define BGP_CAPCODE_ORF 3 /* XXX */
210 #define BGP_CAPCODE_RESTART 64 /* draft-ietf-idr-restart-05 */
211 #define BGP_CAPCODE_AS_NEW 65 /* XXX */
212 #define BGP_CAPCODE_DYN_CAP 67 /* XXX */
213 #define BGP_CAPCODE_RR_CISCO 128
214
215 static struct tok bgp_capcode_values[] = {
216 { BGP_CAPCODE_MP, "Multiprotocol Extensions"},
217 { BGP_CAPCODE_RR, "Route Refresh"},
218 { BGP_CAPCODE_ORF, "Cooperative Route Filtering"},
219 { BGP_CAPCODE_RESTART, "Graceful Restart"},
220 { BGP_CAPCODE_AS_NEW, "32-Bit AS Number"},
221 { BGP_CAPCODE_DYN_CAP, "Dynamic Capability"},
222 { BGP_CAPCODE_RR_CISCO, "Route Refresh (Cisco)"},
223 { 0, NULL}
224 };
225
226 #define BGP_NOTIFY_MAJOR_MSG 1
227 #define BGP_NOTIFY_MAJOR_OPEN 2
228 #define BGP_NOTIFY_MAJOR_UPDATE 3
229 #define BGP_NOTIFY_MAJOR_HOLDTIME 4
230 #define BGP_NOTIFY_MAJOR_FSM 5
231 #define BGP_NOTIFY_MAJOR_CEASE 6
232 #define BGP_NOTIFY_MAJOR_CAP 7
233
234 static struct tok bgp_notify_major_values[] = {
235 { BGP_NOTIFY_MAJOR_MSG, "Message Header Error"},
236 { BGP_NOTIFY_MAJOR_OPEN, "OPEN Message Error"},
237 { BGP_NOTIFY_MAJOR_UPDATE, "UPDATE Message Error"},
238 { BGP_NOTIFY_MAJOR_HOLDTIME,"Hold Timer Expired"},
239 { BGP_NOTIFY_MAJOR_FSM, "Finite State Machine Error"},
240 { BGP_NOTIFY_MAJOR_CEASE, "Cease"},
241 { BGP_NOTIFY_MAJOR_CAP, "Capability Message Error"},
242 { 0, NULL}
243 };
244
245 /* draft-ietf-idr-cease-subcode-02 */
246 #define BGP_NOTIFY_MINOR_CEASE_MAXPRFX 1
247 static struct tok bgp_notify_minor_cease_values[] = {
248 { BGP_NOTIFY_MINOR_CEASE_MAXPRFX, "Maximum Number of Prefixes Reached"},
249 { 2, "Administratively Shutdown"},
250 { 3, "Peer Unconfigured"},
251 { 4, "Administratively Reset"},
252 { 5, "Connection Rejected"},
253 { 6, "Other Configuration Change"},
254 { 7, "Connection Collision Resolution"},
255 { 0, NULL}
256 };
257
258 static struct tok bgp_notify_minor_msg_values[] = {
259 { 1, "Connection Not Synchronized"},
260 { 2, "Bad Message Length"},
261 { 3, "Bad Message Type"},
262 { 0, NULL}
263 };
264
265 static struct tok bgp_notify_minor_open_values[] = {
266 { 1, "Unsupported Version Number"},
267 { 2, "Bad Peer AS"},
268 { 3, "Bad BGP Identifier"},
269 { 4, "Unsupported Optional Parameter"},
270 { 5, "Authentication Failure"},
271 { 6, "Unacceptable Hold Time"},
272 { 7, "Capability Message Error"},
273 { 0, NULL}
274 };
275
276 static struct tok bgp_notify_minor_update_values[] = {
277 { 1, "Malformed Attribute List"},
278 { 2, "Unrecognized Well-known Attribute"},
279 { 3, "Missing Well-known Attribute"},
280 { 4, "Attribute Flags Error"},
281 { 5, "Attribute Length Error"},
282 { 6, "Invalid ORIGIN Attribute"},
283 { 7, "AS Routing Loop"},
284 { 8, "Invalid NEXT_HOP Attribute"},
285 { 9, "Optional Attribute Error"},
286 { 10, "Invalid Network Field"},
287 { 11, "Malformed AS_PATH"},
288 { 0, NULL}
289 };
290
291 static struct tok bgp_notify_minor_cap_values[] = {
292 { 1, "Invalid Action Value" },
293 { 2, "Invalid Capability Length" },
294 { 3, "Malformed Capability Value" },
295 { 4, "Unsupported Capability Code" },
296 { 0, NULL }
297 };
298
299 static struct tok bgp_origin_values[] = {
300 { 0, "IGP"},
301 { 1, "EGP"},
302 { 2, "Incomplete"},
303 { 0, NULL}
304 };
305
306 #define BGP_PMSI_TUNNEL_RSVP_P2MP 1
307 #define BGP_PMSI_TUNNEL_LDP_P2MP 2
308 #define BGP_PMSI_TUNNEL_PIM_SSM 3
309 #define BGP_PMSI_TUNNEL_PIM_SM 4
310 #define BGP_PMSI_TUNNEL_PIM_BIDIR 5
311 #define BGP_PMSI_TUNNEL_INGRESS 6
312 #define BGP_PMSI_TUNNEL_LDP_MP2MP 7
313
314 static struct tok bgp_pmsi_tunnel_values[] = {
315 { BGP_PMSI_TUNNEL_RSVP_P2MP, "RSVP-TE P2MP LSP"},
316 { BGP_PMSI_TUNNEL_LDP_P2MP, "LDP P2MP LSP"},
317 { BGP_PMSI_TUNNEL_PIM_SSM, "PIM-SSM Tree"},
318 { BGP_PMSI_TUNNEL_PIM_SM, "PIM-SM Tree"},
319 { BGP_PMSI_TUNNEL_PIM_BIDIR, "PIM-Bidir Tree"},
320 { BGP_PMSI_TUNNEL_INGRESS, "Ingress Replication"},
321 { BGP_PMSI_TUNNEL_LDP_MP2MP, "LDP MP2MP LSP"},
322 { 0, NULL}
323 };
324
325 static struct tok bgp_pmsi_flag_values[] = {
326 { 0x01, "Leaf Information required"},
327 { 0, NULL}
328 };
329
330
331 /* Subsequent address family identifier, RFC2283 section 7 */
332 #define SAFNUM_RES 0
333 #define SAFNUM_UNICAST 1
334 #define SAFNUM_MULTICAST 2
335 #define SAFNUM_UNIMULTICAST 3
336 /* labeled BGP RFC3107 */
337 #define SAFNUM_LABUNICAST 4
338 /* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */
339 #define SAFNUM_MULTICAST_VPN 5
340 #define SAFNUM_TUNNEL 64 /* XXX */
341 #define SAFNUM_VPLS 65 /* XXX */
342 #define SAFNUM_MDT 66 /* XXX */
343 /* Section 4.3.4 of draft-rosen-rfc2547bis-03.txt */
344 #define SAFNUM_VPNUNICAST 128
345 #define SAFNUM_VPNMULTICAST 129
346 #define SAFNUM_VPNUNIMULTICAST 130
347 /* draft-marques-ppvpn-rt-constrain-01.txt */
348 #define SAFNUM_RT_ROUTING_INFO 132
349
350 #define BGP_VPN_RD_LEN 8
351
352 static struct tok bgp_safi_values[] = {
353 { SAFNUM_RES, "Reserved"},
354 { SAFNUM_UNICAST, "Unicast"},
355 { SAFNUM_MULTICAST, "Multicast"},
356 { SAFNUM_UNIMULTICAST, "Unicast+Multicast"},
357 { SAFNUM_LABUNICAST, "labeled Unicast"},
358 { SAFNUM_TUNNEL, "Tunnel"},
359 { SAFNUM_VPLS, "VPLS"},
360 { SAFNUM_MDT, "MDT"},
361 { SAFNUM_VPNUNICAST, "labeled VPN Unicast"},
362 { SAFNUM_VPNMULTICAST, "labeled VPN Multicast"},
363 { SAFNUM_VPNUNIMULTICAST, "labeled VPN Unicast+Multicast"},
364 { SAFNUM_RT_ROUTING_INFO, "Route Target Routing Information"},
365 { SAFNUM_MULTICAST_VPN, "Multicast VPN"},
366 { 0, NULL }
367 };
368
369 /* well-known community */
370 #define BGP_COMMUNITY_NO_EXPORT 0xffffff01
371 #define BGP_COMMUNITY_NO_ADVERT 0xffffff02
372 #define BGP_COMMUNITY_NO_EXPORT_SUBCONFED 0xffffff03
373
374 /* Extended community type - draft-ietf-idr-bgp-ext-communities-05 */
375 #define BGP_EXT_COM_RT_0 0x0002 /* Route Target,Format AS(2bytes):AN(4bytes) */
376 #define BGP_EXT_COM_RT_1 0x0102 /* Route Target,Format IP address:AN(2bytes) */
377 #define BGP_EXT_COM_RT_2 0x0202 /* Route Target,Format AN(4bytes):local(2bytes) */
378 #define BGP_EXT_COM_RO_0 0x0003 /* Route Origin,Format AS(2bytes):AN(4bytes) */
379 #define BGP_EXT_COM_RO_1 0x0103 /* Route Origin,Format IP address:AN(2bytes) */
380 #define BGP_EXT_COM_RO_2 0x0203 /* Route Origin,Format AN(4bytes):local(2bytes) */
381 #define BGP_EXT_COM_LINKBAND 0x4004 /* Link Bandwidth,Format AS(2B):Bandwidth(4B) */
382 /* rfc2547 bgp-mpls-vpns */
383 #define BGP_EXT_COM_CISCO_MCAST 0x0009 /* cisco proprietary */
384
385 #define BGP_EXT_COM_VPN_ORIGIN 0x0005 /* OSPF Domain ID / VPN of Origin - draft-rosen-vpns-ospf-bgp-mpls */
386 #define BGP_EXT_COM_VPN_ORIGIN2 0x0105 /* duplicate - keep for backwards compatability */
387 #define BGP_EXT_COM_VPN_ORIGIN3 0x0205 /* duplicate - keep for backwards compatability */
388 #define BGP_EXT_COM_VPN_ORIGIN4 0x8005 /* duplicate - keep for backwards compatability */
389
390 #define BGP_EXT_COM_OSPF_RTYPE 0x0306 /* OSPF Route Type,Format Area(4B):RouteType(1B):Options(1B) */
391 #define BGP_EXT_COM_OSPF_RTYPE2 0x8000 /* duplicate - keep for backwards compatability */
392
393 #define BGP_EXT_COM_OSPF_RID 0x0107 /* OSPF Router ID,Format RouterID(4B):Unused(2B) */
394 #define BGP_EXT_COM_OSPF_RID2 0x8001 /* duplicate - keep for backwards compatability */
395
396 #define BGP_EXT_COM_L2INFO 0x800a /* draft-kompella-ppvpn-l2vpn */
397
398 #define BGP_EXT_COM_SOURCE_AS 0x0009 /* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */
399 #define BGP_EXT_COM_VRF_RT_IMP 0x010a /* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */
400
401 /* http://www.cisco.com/en/US/tech/tk436/tk428/technologies_tech_note09186a00801eb09a.shtml */
402 #define BGP_EXT_COM_EIGRP_GEN 0x8800
403 #define BGP_EXT_COM_EIGRP_METRIC_AS_DELAY 0x8801
404 #define BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW 0x8802
405 #define BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU 0x8803
406 #define BGP_EXT_COM_EIGRP_EXT_REMAS_REMID 0x8804
407 #define BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC 0x8805
408
409 static struct tok bgp_extd_comm_flag_values[] = {
410 { 0x8000, "vendor-specific"},
411 { 0x4000, "non-transitive"},
412 { 0, NULL},
413 };
414
415 static struct tok bgp_extd_comm_subtype_values[] = {
416 { BGP_EXT_COM_RT_0, "target"},
417 { BGP_EXT_COM_RT_1, "target"},
418 { BGP_EXT_COM_RT_2, "target"},
419 { BGP_EXT_COM_RO_0, "origin"},
420 { BGP_EXT_COM_RO_1, "origin"},
421 { BGP_EXT_COM_RO_2, "origin"},
422 { BGP_EXT_COM_LINKBAND, "link-BW"},
423 { BGP_EXT_COM_CISCO_MCAST, "mdt-group"},
424 { BGP_EXT_COM_VPN_ORIGIN, "ospf-domain"},
425 { BGP_EXT_COM_VPN_ORIGIN2, "ospf-domain"},
426 { BGP_EXT_COM_VPN_ORIGIN3, "ospf-domain"},
427 { BGP_EXT_COM_VPN_ORIGIN4, "ospf-domain"},
428 { BGP_EXT_COM_OSPF_RTYPE, "ospf-route-type"},
429 { BGP_EXT_COM_OSPF_RTYPE2, "ospf-route-type"},
430 { BGP_EXT_COM_OSPF_RID, "ospf-router-id"},
431 { BGP_EXT_COM_OSPF_RID2, "ospf-router-id"},
432 { BGP_EXT_COM_L2INFO, "layer2-info"},
433 { BGP_EXT_COM_EIGRP_GEN , "eigrp-general-route (flag, tag)" },
434 { BGP_EXT_COM_EIGRP_METRIC_AS_DELAY , "eigrp-route-metric (AS, delay)" },
435 { BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW , "eigrp-route-metric (reliability, nexthop, bandwidth)" },
436 { BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU , "eigrp-route-metric (load, MTU)" },
437 { BGP_EXT_COM_EIGRP_EXT_REMAS_REMID , "eigrp-external-route (remote-AS, remote-ID)" },
438 { BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC , "eigrp-external-route (remote-proto, remote-metric)" },
439 { BGP_EXT_COM_SOURCE_AS, "source-AS" },
440 { BGP_EXT_COM_VRF_RT_IMP, "vrf-route-import"},
441 { 0, NULL},
442 };
443
444 /* OSPF codes for BGP_EXT_COM_OSPF_RTYPE draft-rosen-vpns-ospf-bgp-mpls */
445 #define BGP_OSPF_RTYPE_RTR 1 /* OSPF Router LSA */
446 #define BGP_OSPF_RTYPE_NET 2 /* OSPF Network LSA */
447 #define BGP_OSPF_RTYPE_SUM 3 /* OSPF Summary LSA */
448 #define BGP_OSPF_RTYPE_EXT 5 /* OSPF External LSA, note that ASBR doesn't apply to MPLS-VPN */
449 #define BGP_OSPF_RTYPE_NSSA 7 /* OSPF NSSA External*/
450 #define BGP_OSPF_RTYPE_SHAM 129 /* OSPF-MPLS-VPN Sham link */
451 #define BGP_OSPF_RTYPE_METRIC_TYPE 0x1 /* LSB of RTYPE Options Field */
452
453 static struct tok bgp_extd_comm_ospf_rtype_values[] = {
454 { BGP_OSPF_RTYPE_RTR, "Router" },
455 { BGP_OSPF_RTYPE_NET, "Network" },
456 { BGP_OSPF_RTYPE_SUM, "Summary" },
457 { BGP_OSPF_RTYPE_EXT, "External" },
458 { BGP_OSPF_RTYPE_NSSA,"NSSA External" },
459 { BGP_OSPF_RTYPE_SHAM,"MPLS-VPN Sham" },
460 { 0, NULL },
461 };
462
463 int
464 decode_prefix4(const u_char *pptr, char *buf, u_int buflen)
465 {
466 struct in_addr addr;
467 u_int plen;
468
469 TCHECK(pptr[0]);
470 plen = pptr[0];
471 if (32 < plen)
472 return -1;
473
474 memset(&addr, 0, sizeof(addr));
475 TCHECK2(pptr[1], (plen + 7) / 8);
476 memcpy(&addr, &pptr[1], (plen + 7) / 8);
477 if (plen % 8) {
478 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
479 ((0xff00 >> (plen % 8)) & 0xff);
480 }
481 snprintf(buf, buflen, "%s/%d", getname((u_char *)&addr), plen);
482 return 1 + (plen + 7) / 8;
483
484 trunc:
485 return -2;
486 }
487
488 static int
489 decode_labeled_prefix4(const u_char *pptr, char *buf, u_int buflen)
490 {
491 struct in_addr addr;
492 u_int plen;
493
494 TCHECK(pptr[0]);
495 plen = pptr[0]; /* get prefix length */
496
497 /* this is one of the weirdnesses of rfc3107
498 the label length (actually the label + COS bits)
499 is added to the prefix length;
500 we also do only read out just one label -
501 there is no real application for advertisement of
502 stacked labels in a a single BGP message
503 */
504
505 if (24 > plen)
506 return -1;
507
508 plen-=24; /* adjust prefixlen - labellength */
509
510 if (32 < plen)
511 return -1;
512
513 memset(&addr, 0, sizeof(addr));
514 TCHECK2(pptr[4], (plen + 7) / 8);
515 memcpy(&addr, &pptr[4], (plen + 7) / 8);
516 if (plen % 8) {
517 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
518 ((0xff00 >> (plen % 8)) & 0xff);
519 }
520 /* the label may get offsetted by 4 bits so lets shift it right */
521 snprintf(buf, buflen, "%s/%d, label:%u %s",
522 getname((u_char *)&addr),
523 plen,
524 EXTRACT_24BITS(pptr+1)>>4,
525 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
526
527 return 4 + (plen + 7) / 8;
528
529 trunc:
530 return -2;
531 }
532
533 /*
534 * bgp_vpn_ip_print
535 *
536 * print an ipv4 or ipv6 address into a buffer dependend on address length.
537 */
538 static char *
539 bgp_vpn_ip_print (const u_char *pptr, u_int addr_length) {
540
541 /* worst case string is s fully formatted v6 address */
542 static char addr[sizeof("1234:5678:89ab:cdef:1234:5678:89ab:cdef")];
543 char *pos = addr;
544
545 switch(addr_length) {
546 case (sizeof(struct in_addr) << 3): /* 32 */
547 TCHECK2(pptr[0], sizeof(struct in_addr));
548 snprintf(pos, sizeof(addr), "%s", ipaddr_string(pptr));
549 break;
550 case (sizeof(struct in6_addr) << 3): /* 128 */
551 TCHECK2(pptr[0], sizeof(struct in6_addr));
552 snprintf(pos, sizeof(addr), "%s", ip6addr_string(pptr));
553 break;
554 default:
555 snprintf(pos, sizeof(addr), "bogus address length %u", addr_length);
556 break;
557 }
558 pos += strlen(pos);
559
560 trunc:
561 *(pos) = '\0';
562 return (addr);
563 }
564
565 /*
566 * bgp_vpn_sg_print
567 *
568 * print an multicast s,g entry into a buffer.
569 * the s,g entry is encoded like this.
570 *
571 * +-----------------------------------+
572 * | Multicast Source Length (1 octet) |
573 * +-----------------------------------+
574 * | Multicast Source (Variable) |
575 * +-----------------------------------+
576 * | Multicast Group Length (1 octet) |
577 * +-----------------------------------+
578 * | Multicast Group (Variable) |
579 * +-----------------------------------+
580 *
581 * return the number of bytes read from the wire.
582 */
583 static int
584 bgp_vpn_sg_print (const u_char *pptr, char *buf, u_int buflen) {
585
586 u_int8_t addr_length;
587 u_int total_length, offset;
588
589 total_length = 0;
590
591 /* Source address length, encoded in bits */
592 TCHECK2(pptr[0], 1);
593 addr_length = *pptr++;
594
595 /* Source address */
596 TCHECK2(pptr[0], (addr_length >> 3));
597 total_length += (addr_length >> 3) + 1;
598 offset = strlen(buf);
599 if (addr_length) {
600 snprintf(buf + offset, buflen - offset, ", Source %s",
601 bgp_vpn_ip_print(pptr, addr_length));
602 pptr += (addr_length >> 3);
603 }
604
605 /* Group address length, encoded in bits */
606 TCHECK2(pptr[0], 1);
607 addr_length = *pptr++;
608
609 /* Group address */
610 TCHECK2(pptr[0], (addr_length >> 3));
611 total_length += (addr_length >> 3) + 1;
612 offset = strlen(buf);
613 if (addr_length) {
614 snprintf(buf + offset, buflen - offset, ", Group %s",
615 bgp_vpn_ip_print(pptr, addr_length));
616 pptr += (addr_length >> 3);
617 }
618
619 trunc:
620 return (total_length);
621 }
622
623
624 /* RDs and RTs share the same semantics
625 * we use bgp_vpn_rd_print for
626 * printing route targets inside a NLRI */
627 char *
628 bgp_vpn_rd_print (const u_char *pptr) {
629
630 /* allocate space for the largest possible string */
631 static char rd[sizeof("xxxxxxxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")];
632 char *pos = rd;
633
634 /* ok lets load the RD format */
635 switch (EXTRACT_16BITS(pptr)) {
636
637 /* AS:IP-address fmt*/
638 case 0:
639 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u.%u.%u.%u",
640 EXTRACT_16BITS(pptr+2), *(pptr+4), *(pptr+5), *(pptr+6), *(pptr+7));
641 break;
642 /* IP-address:AS fmt*/
643
644 case 1:
645 snprintf(pos, sizeof(rd) - (pos - rd), "%u.%u.%u.%u:%u",
646 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
647 break;
648
649 /* 4-byte-AS:number fmt*/
650 case 2:
651 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u (%u.%u.%u.%u:%u)",
652 EXTRACT_32BITS(pptr+2), EXTRACT_16BITS(pptr+6),
653 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
654 break;
655 default:
656 snprintf(pos, sizeof(rd) - (pos - rd), "unknown RD format");
657 break;
658 }
659 pos += strlen(pos);
660 *(pos) = '\0';
661 return (rd);
662 }
663
664 static int
665 decode_rt_routing_info(const u_char *pptr, char *buf, u_int buflen)
666 {
667 u_int8_t route_target[8];
668 u_int plen;
669
670 TCHECK(pptr[0]);
671 plen = pptr[0]; /* get prefix length */
672
673 if (0 == plen)
674 return 1; /* default route target */
675
676 if (32 > plen)
677 return -1;
678
679 plen-=32; /* adjust prefix length */
680
681 if (64 < plen)
682 return -1;
683
684 memset(&route_target, 0, sizeof(route_target));
685 TCHECK2(pptr[1], (plen + 7) / 8);
686 memcpy(&route_target, &pptr[1], (plen + 7) / 8);
687 if (plen % 8) {
688 ((u_char *)&route_target)[(plen + 7) / 8 - 1] &=
689 ((0xff00 >> (plen % 8)) & 0xff);
690 }
691 snprintf(buf, buflen, "origin AS: %u, route target %s",
692 EXTRACT_32BITS(pptr+1),
693 bgp_vpn_rd_print((u_char *)&route_target));
694
695 return 5 + (plen + 7) / 8;
696
697 trunc:
698 return -2;
699 }
700
701 static int
702 decode_labeled_vpn_prefix4(const u_char *pptr, char *buf, u_int buflen)
703 {
704 struct in_addr addr;
705 u_int plen;
706
707 TCHECK(pptr[0]);
708 plen = pptr[0]; /* get prefix length */
709
710 if ((24+64) > plen)
711 return -1;
712
713 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
714
715 if (32 < plen)
716 return -1;
717
718 memset(&addr, 0, sizeof(addr));
719 TCHECK2(pptr[12], (plen + 7) / 8);
720 memcpy(&addr, &pptr[12], (plen + 7) / 8);
721 if (plen % 8) {
722 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
723 ((0xff00 >> (plen % 8)) & 0xff);
724 }
725 /* the label may get offsetted by 4 bits so lets shift it right */
726 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
727 bgp_vpn_rd_print(pptr+4),
728 getname((u_char *)&addr),
729 plen,
730 EXTRACT_24BITS(pptr+1)>>4,
731 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
732
733 return 12 + (plen + 7) / 8;
734
735 trunc:
736 return -2;
737 }
738
739 #define BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI 1
740 #define BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI 2
741 #define BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI 3
742 #define BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF 4
743 #define BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE 5
744 #define BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN 6
745 #define BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN 7
746
747 static struct tok bgp_multicast_vpn_route_type_values[] = {
748 { BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI, "Intra-AS I-PMSI"},
749 { BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI, "Inter-AS I-PMSI"},
750 { BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI, "S-PMSI"},
751 { BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF, "Intra-AS Segment-Leaf"},
752 { BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE, "Source-Active"},
753 { BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN, "Shared Tree Join"},
754 { BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN, "Source Tree Join"},
755 };
756
757 static int
758 decode_multicast_vpn(const u_char *pptr, char *buf, u_int buflen)
759 {
760 u_int8_t route_type, route_length, addr_length, sg_length;
761 u_int offset;
762
763 TCHECK2(pptr[0], 2);
764 route_type = *pptr++;
765 route_length = *pptr++;
766
767 snprintf(buf, buflen, "Route-Type: %s (%u), length: %u",
768 tok2str(bgp_multicast_vpn_route_type_values,
769 "Unknown", route_type),
770 route_type, route_length);
771
772 switch(route_type) {
773 case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI:
774 TCHECK2(pptr[0], BGP_VPN_RD_LEN);
775 offset = strlen(buf);
776 snprintf(buf + offset, buflen - offset, ", RD: %s, Originator %s",
777 bgp_vpn_rd_print(pptr),
778 bgp_vpn_ip_print(pptr + BGP_VPN_RD_LEN,
779 (route_length - BGP_VPN_RD_LEN) << 3));
780 break;
781 case BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI:
782 TCHECK2(pptr[0], BGP_VPN_RD_LEN + 4);
783 offset = strlen(buf);
784 snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %u",
785 bgp_vpn_rd_print(pptr),
786 EXTRACT_32BITS(pptr + BGP_VPN_RD_LEN));
787 break;
788
789 case BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI:
790 TCHECK2(pptr[0], BGP_VPN_RD_LEN);
791 offset = strlen(buf);
792 snprintf(buf + offset, buflen - offset, ", RD: %s",
793 bgp_vpn_rd_print(pptr));
794 pptr += BGP_VPN_RD_LEN;
795
796 sg_length = bgp_vpn_sg_print(pptr, buf, buflen);
797 addr_length = route_length - sg_length;
798
799 TCHECK2(pptr[0], addr_length);
800 offset = strlen(buf);
801 snprintf(buf + offset, buflen - offset, ", Originator %s",
802 bgp_vpn_ip_print(pptr, addr_length << 3));
803 break;
804
805 case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE:
806 TCHECK2(pptr[0], BGP_VPN_RD_LEN);
807 offset = strlen(buf);
808 snprintf(buf + offset, buflen - offset, ", RD: %s",
809 bgp_vpn_rd_print(pptr));
810 pptr += BGP_VPN_RD_LEN;
811
812 bgp_vpn_sg_print(pptr, buf, buflen);
813 break;
814
815 case BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN: /* fall through */
816 case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN:
817 TCHECK2(pptr[0], BGP_VPN_RD_LEN);
818 offset = strlen(buf);
819 snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %u",
820 bgp_vpn_rd_print(pptr),
821 EXTRACT_32BITS(pptr + BGP_VPN_RD_LEN));
822 pptr += BGP_VPN_RD_LEN;
823
824 bgp_vpn_sg_print(pptr, buf, buflen);
825 break;
826
827 /*
828 * no per route-type printing yet.
829 */
830 case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF:
831 default:
832 break;
833 }
834
835 return route_length + 2;
836
837 trunc:
838 return -2;
839 }
840
841 static int
842 decode_labeled_vpn_l2(const u_char *pptr, char *buf, u_int buflen)
843 {
844 int plen,tlen,strlen,tlv_type,tlv_len,ttlv_len;
845
846 TCHECK2(pptr[0], 2);
847 plen=EXTRACT_16BITS(pptr);
848 tlen=plen;
849 pptr+=2;
850 TCHECK2(pptr[0],15);
851 strlen=snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u",
852 bgp_vpn_rd_print(pptr),
853 EXTRACT_16BITS(pptr+8),
854 EXTRACT_16BITS(pptr+10),
855 EXTRACT_24BITS(pptr+12)>>4); /* the label is offsetted by 4 bits so lets shift it right */
856 pptr+=15;
857 tlen-=15;
858
859 /* ok now the variable part - lets read out TLVs*/
860 while (tlen>0) {
861 if (tlen < 3)
862 return -1;
863 TCHECK2(pptr[0], 3);
864 tlv_type=*pptr++;
865 tlv_len=EXTRACT_16BITS(pptr);
866 ttlv_len=tlv_len;
867 pptr+=2;
868
869 switch(tlv_type) {
870 case 1:
871 strlen+=snprintf(buf+strlen,buflen-strlen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
872 tlv_type,
873 tlv_len);
874 ttlv_len=ttlv_len/8+1; /* how many bytes do we need to read ? */
875 while (ttlv_len>0) {
876 TCHECK(pptr[0]);
877 strlen+=snprintf(buf+strlen,buflen-strlen, "%02x",*pptr++);
878 ttlv_len--;
879 }
880 break;
881 default:
882 snprintf(buf+strlen,buflen-strlen, "\n\t\tunknown TLV #%u, length: %u",
883 tlv_type,
884 tlv_len);
885 break;
886 }
887 tlen-=(tlv_len<<3); /* the tlv-length is expressed in bits so lets shift it tright */
888 }
889 return plen+2;
890
891 trunc:
892 return -2;
893 }
894
895 #ifdef INET6
896 int
897 decode_prefix6(const u_char *pd, char *buf, u_int buflen)
898 {
899 struct in6_addr addr;
900 u_int plen;
901
902 TCHECK(pd[0]);
903 plen = pd[0];
904 if (128 < plen)
905 return -1;
906
907 memset(&addr, 0, sizeof(addr));
908 TCHECK2(pd[1], (plen + 7) / 8);
909 memcpy(&addr, &pd[1], (plen + 7) / 8);
910 if (plen % 8) {
911 addr.s6_addr[(plen + 7) / 8 - 1] &=
912 ((0xff00 >> (plen % 8)) & 0xff);
913 }
914 snprintf(buf, buflen, "%s/%d", getname6((u_char *)&addr), plen);
915 return 1 + (plen + 7) / 8;
916
917 trunc:
918 return -2;
919 }
920
921 static int
922 decode_labeled_prefix6(const u_char *pptr, char *buf, u_int buflen)
923 {
924 struct in6_addr addr;
925 u_int plen;
926
927 TCHECK(pptr[0]);
928 plen = pptr[0]; /* get prefix length */
929
930 if (24 > plen)
931 return -1;
932
933 plen-=24; /* adjust prefixlen - labellength */
934
935 if (128 < plen)
936 return -1;
937
938 memset(&addr, 0, sizeof(addr));
939 TCHECK2(pptr[4], (plen + 7) / 8);
940 memcpy(&addr, &pptr[4], (plen + 7) / 8);
941 if (plen % 8) {
942 addr.s6_addr[(plen + 7) / 8 - 1] &=
943 ((0xff00 >> (plen % 8)) & 0xff);
944 }
945 /* the label may get offsetted by 4 bits so lets shift it right */
946 snprintf(buf, buflen, "%s/%d, label:%u %s",
947 getname6((u_char *)&addr),
948 plen,
949 EXTRACT_24BITS(pptr+1)>>4,
950 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
951
952 return 4 + (plen + 7) / 8;
953
954 trunc:
955 return -2;
956 }
957
958 static int
959 decode_labeled_vpn_prefix6(const u_char *pptr, char *buf, u_int buflen)
960 {
961 struct in6_addr addr;
962 u_int plen;
963
964 TCHECK(pptr[0]);
965 plen = pptr[0]; /* get prefix length */
966
967 if ((24+64) > plen)
968 return -1;
969
970 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
971
972 if (128 < plen)
973 return -1;
974
975 memset(&addr, 0, sizeof(addr));
976 TCHECK2(pptr[12], (plen + 7) / 8);
977 memcpy(&addr, &pptr[12], (plen + 7) / 8);
978 if (plen % 8) {
979 addr.s6_addr[(plen + 7) / 8 - 1] &=
980 ((0xff00 >> (plen % 8)) & 0xff);
981 }
982 /* the label may get offsetted by 4 bits so lets shift it right */
983 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
984 bgp_vpn_rd_print(pptr+4),
985 getname6((u_char *)&addr),
986 plen,
987 EXTRACT_24BITS(pptr+1)>>4,
988 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
989
990 return 12 + (plen + 7) / 8;
991
992 trunc:
993 return -2;
994 }
995 #endif
996
997 static int
998 decode_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
999 {
1000 u_int8_t addr[19];
1001 u_int plen;
1002
1003 TCHECK(pptr[0]);
1004 plen = pptr[0]; /* get prefix length */
1005
1006 if (152 < plen)
1007 return -1;
1008
1009 memset(&addr, 0, sizeof(addr));
1010 TCHECK2(pptr[4], (plen + 7) / 8);
1011 memcpy(&addr, &pptr[4], (plen + 7) / 8);
1012 if (plen % 8) {
1013 addr[(plen + 7) / 8 - 1] &=
1014 ((0xff00 >> (plen % 8)) & 0xff);
1015 }
1016 snprintf(buf, buflen, "%s/%d",
1017 isonsap_string(addr,(plen + 7) / 8),
1018 plen);
1019
1020 return 1 + (plen + 7) / 8;
1021
1022 trunc:
1023 return -2;
1024 }
1025
1026 static int
1027 decode_labeled_vpn_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
1028 {
1029 u_int8_t addr[19];
1030 u_int plen;
1031
1032 TCHECK(pptr[0]);
1033 plen = pptr[0]; /* get prefix length */
1034
1035 if ((24+64) > plen)
1036 return -1;
1037
1038 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
1039
1040 if (152 < plen)
1041 return -1;
1042
1043 memset(&addr, 0, sizeof(addr));
1044 TCHECK2(pptr[12], (plen + 7) / 8);
1045 memcpy(&addr, &pptr[12], (plen + 7) / 8);
1046 if (plen % 8) {
1047 addr[(plen + 7) / 8 - 1] &=
1048 ((0xff00 >> (plen % 8)) & 0xff);
1049 }
1050 /* the label may get offsetted by 4 bits so lets shift it right */
1051 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
1052 bgp_vpn_rd_print(pptr+4),
1053 isonsap_string(addr,(plen + 7) / 8),
1054 plen,
1055 EXTRACT_24BITS(pptr+1)>>4,
1056 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
1057
1058 return 12 + (plen + 7) / 8;
1059
1060 trunc:
1061 return -2;
1062 }
1063
1064 static int
1065 bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len)
1066 {
1067 int i;
1068 u_int16_t af;
1069 u_int8_t safi, snpa, nhlen;
1070 union { /* copy buffer for bandwidth values */
1071 float f;
1072 u_int32_t i;
1073 } bw;
1074 int advance;
1075 int tlen;
1076 const u_char *tptr;
1077 char buf[MAXHOSTNAMELEN + 100];
1078 char tokbuf[TOKBUFSIZE];
1079
1080 tptr = pptr;
1081 tlen=len;
1082
1083 switch (attr->bgpa_type) {
1084 case BGPTYPE_ORIGIN:
1085 if (len != 1)
1086 printf("invalid len");
1087 else {
1088 TCHECK(*tptr);
1089 printf("%s", tok2strbuf(bgp_origin_values,
1090 "Unknown Origin Typecode",
1091 tptr[0],
1092 tokbuf, sizeof(tokbuf)));
1093 }
1094 break;
1095
1096 case BGPTYPE_AS_PATH:
1097 if (len % 2) {
1098 printf("invalid len");
1099 break;
1100 }
1101 if (!len) {
1102 printf("empty");
1103 break;
1104 }
1105
1106 while (tptr < pptr + len) {
1107 TCHECK(tptr[0]);
1108 printf("%s", tok2strbuf(bgp_as_path_segment_open_values,
1109 "?", tptr[0],
1110 tokbuf, sizeof(tokbuf)));
1111 for (i = 0; i < tptr[1] * 2; i += 2) {
1112 TCHECK2(tptr[2 + i], 2);
1113 printf("%u ", EXTRACT_16BITS(&tptr[2 + i]));
1114 }
1115 TCHECK(tptr[0]);
1116 printf("%s", tok2strbuf(bgp_as_path_segment_close_values,
1117 "?", tptr[0],
1118 tokbuf, sizeof(tokbuf)));
1119 TCHECK(tptr[1]);
1120 tptr += 2 + tptr[1] * 2;
1121 }
1122 break;
1123 case BGPTYPE_NEXT_HOP:
1124 if (len != 4)
1125 printf("invalid len");
1126 else {
1127 TCHECK2(tptr[0], 4);
1128 printf("%s", getname(tptr));
1129 }
1130 break;
1131 case BGPTYPE_MULTI_EXIT_DISC:
1132 case BGPTYPE_LOCAL_PREF:
1133 if (len != 4)
1134 printf("invalid len");
1135 else {
1136 TCHECK2(tptr[0], 4);
1137 printf("%u", EXTRACT_32BITS(tptr));
1138 }
1139 break;
1140 case BGPTYPE_ATOMIC_AGGREGATE:
1141 if (len != 0)
1142 printf("invalid len");
1143 break;
1144 case BGPTYPE_AGGREGATOR:
1145 if (len != 6) {
1146 printf("invalid len");
1147 break;
1148 }
1149 TCHECK2(tptr[0], 6);
1150 printf(" AS #%u, origin %s", EXTRACT_16BITS(tptr),
1151 getname(tptr + 2));
1152 break;
1153 case BGPTYPE_COMMUNITIES:
1154 if (len % 4) {
1155 printf("invalid len");
1156 break;
1157 }
1158 while (tlen>0) {
1159 u_int32_t comm;
1160 TCHECK2(tptr[0], 4);
1161 comm = EXTRACT_32BITS(tptr);
1162 switch (comm) {
1163 case BGP_COMMUNITY_NO_EXPORT:
1164 printf(" NO_EXPORT");
1165 break;
1166 case BGP_COMMUNITY_NO_ADVERT:
1167 printf(" NO_ADVERTISE");
1168 break;
1169 case BGP_COMMUNITY_NO_EXPORT_SUBCONFED:
1170 printf(" NO_EXPORT_SUBCONFED");
1171 break;
1172 default:
1173 printf("%u:%u%s",
1174 (comm >> 16) & 0xffff,
1175 comm & 0xffff,
1176 (tlen>4) ? ", " : "");
1177 break;
1178 }
1179 tlen -=4;
1180 tptr +=4;
1181 }
1182 break;
1183 case BGPTYPE_ORIGINATOR_ID:
1184 if (len != 4) {
1185 printf("invalid len");
1186 break;
1187 }
1188 TCHECK2(tptr[0], 4);
1189 printf("%s",getname(tptr));
1190 break;
1191 case BGPTYPE_CLUSTER_LIST:
1192 if (len % 4) {
1193 printf("invalid len");
1194 break;
1195 }
1196 while (tlen>0) {
1197 TCHECK2(tptr[0], 4);
1198 printf("%s%s",
1199 getname(tptr),
1200 (tlen>4) ? ", " : "");
1201 tlen -=4;
1202 tptr +=4;
1203 }
1204 break;
1205 case BGPTYPE_MP_REACH_NLRI:
1206 TCHECK2(tptr[0], 3);
1207 af = EXTRACT_16BITS(tptr);
1208 safi = tptr[2];
1209
1210 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1211 tok2strbuf(af_values, "Unknown AFI", af,
1212 tokbuf, sizeof(tokbuf)),
1213 af,
1214 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1215 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1216 tokbuf, sizeof(tokbuf)),
1217 safi);
1218
1219 switch(af<<8 | safi) {
1220 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1221 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1222 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1223 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1224 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1225 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1226 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1227 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1228 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN):
1229 #ifdef INET6
1230 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1231 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1232 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1233 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1234 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1235 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1236 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1237 #endif
1238 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1239 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1240 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1241 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1242 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1243 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1244 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1245 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1246 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1247 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1248 break;
1249 default:
1250 TCHECK2(tptr[0], tlen);
1251 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1252 if (vflag <= 1)
1253 print_unknown_data(tptr,"\n\t ",tlen);
1254 goto done;
1255 break;
1256 }
1257
1258 tptr +=3;
1259
1260 TCHECK(tptr[0]);
1261 nhlen = tptr[0];
1262 tlen = nhlen;
1263 tptr++;
1264
1265 if (tlen) {
1266 printf("\n\t nexthop: ");
1267 while (tlen > 0) {
1268 switch(af<<8 | safi) {
1269 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1270 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1271 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1272 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1273 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1274 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN):
1275 if (tlen < (int)sizeof(struct in_addr)) {
1276 printf("invalid len");
1277 tlen = 0;
1278 } else {
1279 TCHECK2(tptr[0], sizeof(struct in_addr));
1280 printf("%s",getname(tptr));
1281 tlen -= sizeof(struct in_addr);
1282 tptr += sizeof(struct in_addr);
1283 }
1284 break;
1285 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1286 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1287 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1288 if (tlen < (int)(sizeof(struct in_addr)+BGP_VPN_RD_LEN)) {
1289 printf("invalid len");
1290 tlen = 0;
1291 } else {
1292 TCHECK2(tptr[0], sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1293 printf("RD: %s, %s",
1294 bgp_vpn_rd_print(tptr),
1295 getname(tptr+BGP_VPN_RD_LEN));
1296 tlen -= (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1297 tptr += (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1298 }
1299 break;
1300 #ifdef INET6
1301 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1302 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1303 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1304 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1305 if (tlen < (int)sizeof(struct in6_addr)) {
1306 printf("invalid len");
1307 tlen = 0;
1308 } else {
1309 TCHECK2(tptr[0], sizeof(struct in6_addr));
1310 printf("%s", getname6(tptr));
1311 tlen -= sizeof(struct in6_addr);
1312 tptr += sizeof(struct in6_addr);
1313 }
1314 break;
1315 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1316 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1317 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1318 if (tlen < (int)(sizeof(struct in6_addr)+BGP_VPN_RD_LEN)) {
1319 printf("invalid len");
1320 tlen = 0;
1321 } else {
1322 TCHECK2(tptr[0], sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1323 printf("RD: %s, %s",
1324 bgp_vpn_rd_print(tptr),
1325 getname6(tptr+BGP_VPN_RD_LEN));
1326 tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1327 tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1328 }
1329 break;
1330 #endif
1331 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1332 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1333 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1334 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1335 if (tlen < (int)sizeof(struct in_addr)) {
1336 printf("invalid len");
1337 tlen = 0;
1338 } else {
1339 TCHECK2(tptr[0], sizeof(struct in_addr));
1340 printf("%s", getname(tptr));
1341 tlen -= (sizeof(struct in_addr));
1342 tptr += (sizeof(struct in_addr));
1343 }
1344 break;
1345 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1346 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1347 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1348 TCHECK2(tptr[0], tlen);
1349 printf("%s",isonsap_string(tptr,tlen));
1350 tptr += tlen;
1351 tlen = 0;
1352 break;
1353
1354 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1355 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1356 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1357 if (tlen < BGP_VPN_RD_LEN+1) {
1358 printf("invalid len");
1359 tlen = 0;
1360 } else {
1361 TCHECK2(tptr[0], tlen);
1362 printf("RD: %s, %s",
1363 bgp_vpn_rd_print(tptr),
1364 isonsap_string(tptr+BGP_VPN_RD_LEN,tlen-BGP_VPN_RD_LEN));
1365 /* rfc986 mapped IPv4 address ? */
1366 if (EXTRACT_32BITS(tptr+BGP_VPN_RD_LEN) == 0x47000601)
1367 printf(" = %s", getname(tptr+BGP_VPN_RD_LEN+4));
1368 #ifdef INET6
1369 /* rfc1888 mapped IPv6 address ? */
1370 else if (EXTRACT_24BITS(tptr+BGP_VPN_RD_LEN) == 0x350000)
1371 printf(" = %s", getname6(tptr+BGP_VPN_RD_LEN+3));
1372 #endif
1373 tptr += tlen;
1374 tlen = 0;
1375 }
1376 break;
1377 default:
1378 TCHECK2(tptr[0], tlen);
1379 printf("no AFI %u/SAFI %u decoder",af,safi);
1380 if (vflag <= 1)
1381 print_unknown_data(tptr,"\n\t ",tlen);
1382 tptr += tlen;
1383 tlen = 0;
1384 goto done;
1385 break;
1386 }
1387 }
1388 }
1389 printf(", nh-length: %u", nhlen);
1390 tptr += tlen;
1391
1392 TCHECK(tptr[0]);
1393 snpa = tptr[0];
1394 tptr++;
1395
1396 if (snpa) {
1397 printf("\n\t %u SNPA", snpa);
1398 for (/*nothing*/; snpa > 0; snpa--) {
1399 TCHECK(tptr[0]);
1400 printf("\n\t %d bytes", tptr[0]);
1401 tptr += tptr[0] + 1;
1402 }
1403 } else {
1404 printf(", no SNPA");
1405 }
1406
1407 while (len - (tptr - pptr) > 0) {
1408 switch (af<<8 | safi) {
1409 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1410 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1411 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1412 advance = decode_prefix4(tptr, buf, sizeof(buf));
1413 if (advance == -1)
1414 printf("\n\t (illegal prefix length)");
1415 else if (advance == -2)
1416 goto trunc;
1417 else
1418 printf("\n\t %s", buf);
1419 break;
1420 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1421 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1422 if (advance == -1)
1423 printf("\n\t (illegal prefix length)");
1424 else if (advance == -2)
1425 goto trunc;
1426 else
1427 printf("\n\t %s", buf);
1428 break;
1429 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1430 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1431 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1432 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1433 if (advance == -1)
1434 printf("\n\t (illegal prefix length)");
1435 else if (advance == -2)
1436 goto trunc;
1437 else
1438 printf("\n\t %s", buf);
1439 break;
1440 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1441 advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1442 if (advance == -1)
1443 printf("\n\t (illegal prefix length)");
1444 else if (advance == -2)
1445 goto trunc;
1446 else
1447 printf("\n\t %s", buf);
1448 break;
1449 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */
1450 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN):
1451 advance = decode_multicast_vpn(tptr, buf, sizeof(buf));
1452 if (advance == -1)
1453 printf("\n\t (illegal prefix length)");
1454 else if (advance == -2)
1455 goto trunc;
1456 else
1457 printf("\n\t %s", buf);
1458 break;
1459 #ifdef INET6
1460 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1461 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1462 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1463 advance = decode_prefix6(tptr, buf, sizeof(buf));
1464 if (advance == -1)
1465 printf("\n\t (illegal prefix length)");
1466 else if (advance == -2)
1467 goto trunc;
1468 else
1469 printf("\n\t %s", buf);
1470 break;
1471 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1472 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1473 if (advance == -1)
1474 printf("\n\t (illegal prefix length)");
1475 else if (advance == -2)
1476 goto trunc;
1477 else
1478 printf("\n\t %s", buf);
1479 break;
1480 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1481 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1482 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1483 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1484 if (advance == -1)
1485 printf("\n\t (illegal prefix length)");
1486 else if (advance == -2)
1487 goto trunc;
1488 else
1489 printf("\n\t %s", buf);
1490 break;
1491 #endif
1492 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1493 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1494 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1495 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1496 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1497 if (advance == -1)
1498 printf("\n\t (illegal length)");
1499 else if (advance == -2)
1500 goto trunc;
1501 else
1502 printf("\n\t %s", buf);
1503 break;
1504 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1505 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1506 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1507 advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1508 if (advance == -1)
1509 printf("\n\t (illegal prefix length)");
1510 else if (advance == -2)
1511 goto trunc;
1512 else
1513 printf("\n\t %s", buf);
1514 break;
1515 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1516 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1517 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1518 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1519 if (advance == -1)
1520 printf("\n\t (illegal prefix length)");
1521 else if (advance == -2)
1522 goto trunc;
1523 else
1524 printf("\n\t %s", buf);
1525 break;
1526 default:
1527 TCHECK2(*tptr,tlen);
1528 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1529 if (vflag <= 1)
1530 print_unknown_data(tptr,"\n\t ",tlen);
1531 advance = 0;
1532 tptr = pptr + len;
1533 break;
1534 }
1535 if (advance < 0)
1536 break;
1537 tptr += advance;
1538 }
1539 done:
1540 break;
1541
1542 case BGPTYPE_MP_UNREACH_NLRI:
1543 TCHECK2(tptr[0], BGP_MP_NLRI_MINSIZE);
1544 af = EXTRACT_16BITS(tptr);
1545 safi = tptr[2];
1546
1547 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1548 tok2strbuf(af_values, "Unknown AFI", af,
1549 tokbuf, sizeof(tokbuf)),
1550 af,
1551 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1552 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1553 tokbuf, sizeof(tokbuf)),
1554 safi);
1555
1556 if (len == BGP_MP_NLRI_MINSIZE)
1557 printf("\n\t End-of-Rib Marker (empty NLRI)");
1558
1559 tptr += 3;
1560
1561 while (len - (tptr - pptr) > 0) {
1562 switch (af<<8 | safi) {
1563 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1564 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1565 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1566 advance = decode_prefix4(tptr, buf, sizeof(buf));
1567 if (advance == -1)
1568 printf("\n\t (illegal prefix length)");
1569 else if (advance == -2)
1570 goto trunc;
1571 else
1572 printf("\n\t %s", buf);
1573 break;
1574 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1575 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1576 if (advance == -1)
1577 printf("\n\t (illegal prefix length)");
1578 else if (advance == -2)
1579 goto trunc;
1580 else
1581 printf("\n\t %s", buf);
1582 break;
1583 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1584 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1585 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1586 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1587 if (advance == -1)
1588 printf("\n\t (illegal prefix length)");
1589 else if (advance == -2)
1590 goto trunc;
1591 else
1592 printf("\n\t %s", buf);
1593 break;
1594 #ifdef INET6
1595 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1596 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1597 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1598 advance = decode_prefix6(tptr, buf, sizeof(buf));
1599 if (advance == -1)
1600 printf("\n\t (illegal prefix length)");
1601 else if (advance == -2)
1602 goto trunc;
1603 else
1604 printf("\n\t %s", buf);
1605 break;
1606 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1607 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1608 if (advance == -1)
1609 printf("\n\t (illegal prefix length)");
1610 else if (advance == -2)
1611 goto trunc;
1612 else
1613 printf("\n\t %s", buf);
1614 break;
1615 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1616 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1617 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1618 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1619 if (advance == -1)
1620 printf("\n\t (illegal prefix length)");
1621 else if (advance == -2)
1622 goto trunc;
1623 else
1624 printf("\n\t %s", buf);
1625 break;
1626 #endif
1627 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1628 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1629 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1630 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1631 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1632 if (advance == -1)
1633 printf("\n\t (illegal length)");
1634 else if (advance == -2)
1635 goto trunc;
1636 else
1637 printf("\n\t %s", buf);
1638 break;
1639 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1640 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1641 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1642 advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1643 if (advance == -1)
1644 printf("\n\t (illegal prefix length)");
1645 else if (advance == -2)
1646 goto trunc;
1647 else
1648 printf("\n\t %s", buf);
1649 break;
1650 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1651 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1652 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1653 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1654 if (advance == -1)
1655 printf("\n\t (illegal prefix length)");
1656 else if (advance == -2)
1657 goto trunc;
1658 else
1659 printf("\n\t %s", buf);
1660 break;
1661 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */
1662 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN):
1663 advance = decode_multicast_vpn(tptr, buf, sizeof(buf));
1664 if (advance == -1)
1665 printf("\n\t (illegal prefix length)");
1666 else if (advance == -2)
1667 goto trunc;
1668 else
1669 printf("\n\t %s", buf);
1670 break;
1671 default:
1672 TCHECK2(*(tptr-3),tlen);
1673 printf("no AFI %u / SAFI %u decoder",af,safi);
1674 if (vflag <= 1)
1675 print_unknown_data(tptr-3,"\n\t ",tlen);
1676 advance = 0;
1677 tptr = pptr + len;
1678 break;
1679 }
1680 if (advance < 0)
1681 break;
1682 tptr += advance;
1683 }
1684 break;
1685 case BGPTYPE_EXTD_COMMUNITIES:
1686 if (len % 8) {
1687 printf("invalid len");
1688 break;
1689 }
1690 while (tlen>0) {
1691 u_int16_t extd_comm;
1692
1693 TCHECK2(tptr[0], 2);
1694 extd_comm=EXTRACT_16BITS(tptr);
1695
1696 printf("\n\t %s (0x%04x), Flags [%s]",
1697 tok2strbuf(bgp_extd_comm_subtype_values,
1698 "unknown extd community typecode",
1699 extd_comm, tokbuf, sizeof(tokbuf)),
1700 extd_comm,
1701 bittok2str(bgp_extd_comm_flag_values, "none", extd_comm));
1702
1703 TCHECK2(*(tptr+2), 6);
1704 switch(extd_comm) {
1705 case BGP_EXT_COM_RT_0:
1706 case BGP_EXT_COM_RO_0:
1707 printf(": %u:%s",
1708 EXTRACT_16BITS(tptr+2),
1709 getname(tptr+4));
1710 break;
1711 case BGP_EXT_COM_RT_1:
1712 case BGP_EXT_COM_RO_1:
1713 case BGP_EXT_COM_VRF_RT_IMP:
1714 printf(": %s:%u",
1715 getname(tptr+2),
1716 EXTRACT_16BITS(tptr+6));
1717 break;
1718 case BGP_EXT_COM_RT_2:
1719 case BGP_EXT_COM_RO_2:
1720 printf(": %u:%u",
1721 EXTRACT_32BITS(tptr+2),
1722 EXTRACT_16BITS(tptr+6));
1723 break;
1724 case BGP_EXT_COM_LINKBAND:
1725 bw.i = EXTRACT_32BITS(tptr+2);
1726 printf(": bandwidth: %.3f Mbps",
1727 bw.f*8/1000000);
1728 break;
1729 case BGP_EXT_COM_CISCO_MCAST:
1730 printf(": AS %u, group %s",
1731 EXTRACT_16BITS(tptr+2),
1732 getname(tptr+4));
1733 break;
1734 case BGP_EXT_COM_VPN_ORIGIN:
1735 case BGP_EXT_COM_VPN_ORIGIN2:
1736 case BGP_EXT_COM_VPN_ORIGIN3:
1737 case BGP_EXT_COM_VPN_ORIGIN4:
1738 case BGP_EXT_COM_OSPF_RID:
1739 case BGP_EXT_COM_OSPF_RID2:
1740 printf("%s", getname(tptr+2));
1741 break;
1742 case BGP_EXT_COM_OSPF_RTYPE:
1743 case BGP_EXT_COM_OSPF_RTYPE2:
1744 printf(": area:%s, router-type:%s, metric-type:%s%s",
1745 getname(tptr+2),
1746 tok2strbuf(bgp_extd_comm_ospf_rtype_values,
1747 "unknown (0x%02x)",
1748 *(tptr+6),
1749 tokbuf, sizeof(tokbuf)),
1750 (*(tptr+7) & BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "",
1751 ((*(tptr+6) == BGP_OSPF_RTYPE_EXT) || (*(tptr+6) == BGP_OSPF_RTYPE_NSSA)) ? "E1" : "");
1752 break;
1753 case BGP_EXT_COM_L2INFO:
1754 printf(": %s Control Flags [0x%02x]:MTU %u",
1755 tok2strbuf(l2vpn_encaps_values,
1756 "unknown encaps",
1757 *(tptr+2),
1758 tokbuf, sizeof(tokbuf)),
1759 *(tptr+3),
1760 EXTRACT_16BITS(tptr+4));
1761 break;
1762 case BGP_EXT_COM_SOURCE_AS:
1763 printf(": AS %u", EXTRACT_16BITS(tptr+2));
1764 break;
1765 default:
1766 TCHECK2(*tptr,8);
1767 print_unknown_data(tptr,"\n\t ",8);
1768 break;
1769 }
1770 tlen -=8;
1771 tptr +=8;
1772 }
1773 break;
1774
1775 case BGPTYPE_PMSI_TUNNEL:
1776 {
1777 u_int8_t tunnel_type, flags;
1778
1779 tunnel_type = *(tptr+1);
1780 flags = *tptr;
1781 tlen = len;
1782
1783 TCHECK2(tptr[0], 5);
1784 printf("\n\t Tunnel-type %s (%u), Flags [%s], MPLS Label %u",
1785 tok2str(bgp_pmsi_tunnel_values, "Unknown", tunnel_type),
1786 tunnel_type,
1787 bittok2str(bgp_pmsi_flag_values, "none", flags),
1788 EXTRACT_24BITS(tptr+2)>>4);
1789
1790 tptr +=5;
1791 tlen -= 5;
1792
1793 switch (tunnel_type) {
1794 case BGP_PMSI_TUNNEL_PIM_SM: /* fall through */
1795 case BGP_PMSI_TUNNEL_PIM_BIDIR:
1796 TCHECK2(tptr[0], 8);
1797 printf("\n\t Sender %s, P-Group %s",
1798 ipaddr_string(tptr),
1799 ipaddr_string(tptr+4));
1800 break;
1801
1802 case BGP_PMSI_TUNNEL_PIM_SSM:
1803 TCHECK2(tptr[0], 8);
1804 printf("\n\t Root-Node %s, P-Group %s",
1805 ipaddr_string(tptr),
1806 ipaddr_string(tptr+4));
1807 break;
1808 case BGP_PMSI_TUNNEL_INGRESS:
1809 TCHECK2(tptr[0], 4);
1810 printf("\n\t Tunnel-Endpoint %s",
1811 ipaddr_string(tptr));
1812 break;
1813 case BGP_PMSI_TUNNEL_LDP_P2MP: /* fall through */
1814 case BGP_PMSI_TUNNEL_LDP_MP2MP:
1815 TCHECK2(tptr[0], 8);
1816 printf("\n\t Root-Node %s, LSP-ID 0x%08x",
1817 ipaddr_string(tptr),
1818 EXTRACT_32BITS(tptr+4));
1819 break;
1820 case BGP_PMSI_TUNNEL_RSVP_P2MP:
1821 TCHECK2(tptr[0], 8);
1822 printf("\n\t Extended-Tunnel-ID %s, P2MP-ID 0x%08x",
1823 ipaddr_string(tptr),
1824 EXTRACT_32BITS(tptr+4));
1825 break;
1826 default:
1827 if (vflag <= 1) {
1828 print_unknown_data(tptr,"\n\t ",tlen);
1829 }
1830 }
1831 break;
1832 }
1833 case BGPTYPE_ATTR_SET:
1834 TCHECK2(tptr[0], 4);
1835 printf("\n\t Origin AS: %u", EXTRACT_32BITS(tptr));
1836 tptr+=4;
1837 len -=4;
1838
1839 while (len >= 2 ) {
1840 int alen;
1841 struct bgp_attr bgpa;
1842
1843 TCHECK2(tptr[0], sizeof(bgpa));
1844 memcpy(&bgpa, tptr, sizeof(bgpa));
1845 alen = bgp_attr_len(&bgpa);
1846 tptr += bgp_attr_off(&bgpa);
1847 len -= bgp_attr_off(&bgpa);
1848
1849 printf("\n\t %s (%u), length: %u",
1850 tok2strbuf(bgp_attr_values,
1851 "Unknown Attribute", bgpa.bgpa_type,
1852 tokbuf, sizeof(tokbuf)),
1853 bgpa.bgpa_type,
1854 alen);
1855
1856 if (bgpa.bgpa_flags) {
1857 printf(", Flags [%s%s%s%s",
1858 bgpa.bgpa_flags & 0x80 ? "O" : "",
1859 bgpa.bgpa_flags & 0x40 ? "T" : "",
1860 bgpa.bgpa_flags & 0x20 ? "P" : "",
1861 bgpa.bgpa_flags & 0x10 ? "E" : "");
1862 if (bgpa.bgpa_flags & 0xf)
1863 printf("+%x", bgpa.bgpa_flags & 0xf);
1864 printf("]: ");
1865 }
1866 /* FIXME check for recursion */
1867 if (!bgp_attr_print(&bgpa, tptr, alen))
1868 return 0;
1869 tptr += alen;
1870 len -= alen;
1871 }
1872 break;
1873
1874
1875 default:
1876 TCHECK2(*pptr,len);
1877 printf("\n\t no Attribute %u decoder",attr->bgpa_type); /* we have no decoder for the attribute */
1878 if (vflag <= 1)
1879 print_unknown_data(pptr,"\n\t ",len);
1880 break;
1881 }
1882 if (vflag > 1 && len) { /* omit zero length attributes*/
1883 TCHECK2(*pptr,len);
1884 print_unknown_data(pptr,"\n\t ",len);
1885 }
1886 return 1;
1887
1888 trunc:
1889 return 0;
1890 }
1891
1892 static void
1893 bgp_open_print(const u_char *dat, int length)
1894 {
1895 struct bgp_open bgpo;
1896 struct bgp_opt bgpopt;
1897 const u_char *opt;
1898 int i,cap_type,cap_len,tcap_len,cap_offset;
1899 char tokbuf[TOKBUFSIZE];
1900 char tokbuf2[TOKBUFSIZE];
1901
1902 TCHECK2(dat[0], BGP_OPEN_SIZE);
1903 memcpy(&bgpo, dat, BGP_OPEN_SIZE);
1904
1905 printf("\n\t Version %d, ", bgpo.bgpo_version);
1906 printf("my AS %u, ", ntohs(bgpo.bgpo_myas));
1907 printf("Holdtime %us, ", ntohs(bgpo.bgpo_holdtime));
1908 printf("ID %s", getname((u_char *)&bgpo.bgpo_id));
1909 printf("\n\t Optional parameters, length: %u", bgpo.bgpo_optlen);
1910
1911 /* some little sanity checking */
1912 if (length < bgpo.bgpo_optlen+BGP_OPEN_SIZE)
1913 return;
1914
1915 /* ugly! */
1916 opt = &((const struct bgp_open *)dat)->bgpo_optlen;
1917 opt++;
1918
1919 i = 0;
1920 while (i < bgpo.bgpo_optlen) {
1921 TCHECK2(opt[i], BGP_OPT_SIZE);
1922 memcpy(&bgpopt, &opt[i], BGP_OPT_SIZE);
1923 if (i + 2 + bgpopt.bgpopt_len > bgpo.bgpo_optlen) {
1924 printf("\n\t Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len);
1925 break;
1926 }
1927
1928 printf("\n\t Option %s (%u), length: %u",
1929 tok2strbuf(bgp_opt_values,"Unknown",
1930 bgpopt.bgpopt_type,
1931 tokbuf, sizeof(tokbuf)),
1932 bgpopt.bgpopt_type,
1933 bgpopt.bgpopt_len);
1934
1935 /* now lets decode the options we know*/
1936 switch(bgpopt.bgpopt_type) {
1937 case BGP_OPT_CAP:
1938 cap_type=opt[i+BGP_OPT_SIZE];
1939 cap_len=opt[i+BGP_OPT_SIZE+1];
1940 tcap_len=cap_len;
1941 printf("\n\t %s (%u), length: %u",
1942 tok2strbuf(bgp_capcode_values, "Unknown",
1943 cap_type, tokbuf, sizeof(tokbuf)),
1944 cap_type,
1945 cap_len);
1946 switch(cap_type) {
1947 case BGP_CAPCODE_MP:
1948 printf("\n\t\tAFI %s (%u), SAFI %s (%u)",
1949 tok2strbuf(af_values, "Unknown",
1950 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1951 tokbuf, sizeof(tokbuf)),
1952 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1953 tok2strbuf(bgp_safi_values, "Unknown",
1954 opt[i+BGP_OPT_SIZE+5],
1955 tokbuf, sizeof(tokbuf)),
1956 opt[i+BGP_OPT_SIZE+5]);
1957 break;
1958 case BGP_CAPCODE_RESTART:
1959 printf("\n\t\tRestart Flags: [%s], Restart Time %us",
1960 ((opt[i+BGP_OPT_SIZE+2])&0x80) ? "R" : "none",
1961 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2)&0xfff);
1962 tcap_len-=2;
1963 cap_offset=4;
1964 while(tcap_len>=4) {
1965 printf("\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s",
1966 tok2strbuf(af_values,"Unknown",
1967 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1968 tokbuf, sizeof(tokbuf)),
1969 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1970 tok2strbuf(bgp_safi_values,"Unknown",
1971 opt[i+BGP_OPT_SIZE+cap_offset+2],
1972 tokbuf2, sizeof(tokbuf2)),
1973 opt[i+BGP_OPT_SIZE+cap_offset+2],
1974 ((opt[i+BGP_OPT_SIZE+cap_offset+3])&0x80) ? "yes" : "no" );
1975 tcap_len-=4;
1976 cap_offset+=4;
1977 }
1978 break;
1979 case BGP_CAPCODE_RR:
1980 case BGP_CAPCODE_RR_CISCO:
1981 break;
1982 default:
1983 TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
1984 printf("\n\t\tno decoder for Capability %u",
1985 cap_type);
1986 if (vflag <= 1)
1987 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
1988 break;
1989 }
1990 if (vflag > 1) {
1991 TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
1992 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
1993 }
1994 break;
1995 case BGP_OPT_AUTH:
1996 default:
1997 printf("\n\t no decoder for option %u",
1998 bgpopt.bgpopt_type);
1999 break;
2000 }
2001
2002 i += BGP_OPT_SIZE + bgpopt.bgpopt_len;
2003 }
2004 return;
2005 trunc:
2006 printf("[|BGP]");
2007 }
2008
2009 static void
2010 bgp_update_print(const u_char *dat, int length)
2011 {
2012 struct bgp bgp;
2013 struct bgp_attr bgpa;
2014 const u_char *p;
2015 int len;
2016 int i;
2017 char tokbuf[TOKBUFSIZE];
2018
2019 TCHECK2(dat[0], BGP_SIZE);
2020 memcpy(&bgp, dat, BGP_SIZE);
2021 p = dat + BGP_SIZE; /*XXX*/
2022
2023 /* Unfeasible routes */
2024 len = EXTRACT_16BITS(p);
2025 if (len) {
2026 /*
2027 * Without keeping state from the original NLRI message,
2028 * it's not possible to tell if this a v4 or v6 route,
2029 * so only try to decode it if we're not v6 enabled.
2030 */
2031 #ifdef INET6
2032 printf("\n\t Withdrawn routes: %d bytes", len);
2033 #else
2034 char buf[MAXHOSTNAMELEN + 100];
2035 int wpfx;
2036
2037 TCHECK2(p[2], len);
2038 i = 2;
2039
2040 printf("\n\t Withdrawn routes:");
2041
2042 while(i < 2 + len) {
2043 wpfx = decode_prefix4(&p[i], buf, sizeof(buf));
2044 if (wpfx == -1) {
2045 printf("\n\t (illegal prefix length)");
2046 break;
2047 } else if (wpfx == -2)
2048 goto trunc;
2049 else {
2050 i += wpfx;
2051 printf("\n\t %s", buf);
2052 }
2053 }
2054 #endif
2055 }
2056 p += 2 + len;
2057
2058 TCHECK2(p[0], 2);
2059 len = EXTRACT_16BITS(p);
2060
2061 if (len == 0 && length == BGP_UPDATE_MINSIZE) {
2062 printf("\n\t End-of-Rib Marker (empty NLRI)");
2063 return;
2064 }
2065
2066 if (len) {
2067 /* do something more useful!*/
2068 i = 2;
2069 while (i < 2 + len) {
2070 int alen, aoff;
2071
2072 TCHECK2(p[i], sizeof(bgpa));
2073 memcpy(&bgpa, &p[i], sizeof(bgpa));
2074 alen = bgp_attr_len(&bgpa);
2075 aoff = bgp_attr_off(&bgpa);
2076
2077 printf("\n\t %s (%u), length: %u",
2078 tok2strbuf(bgp_attr_values, "Unknown Attribute",
2079 bgpa.bgpa_type,
2080 tokbuf, sizeof(tokbuf)),
2081 bgpa.bgpa_type,
2082 alen);
2083
2084 if (bgpa.bgpa_flags) {
2085 printf(", Flags [%s%s%s%s",
2086 bgpa.bgpa_flags & 0x80 ? "O" : "",
2087 bgpa.bgpa_flags & 0x40 ? "T" : "",
2088 bgpa.bgpa_flags & 0x20 ? "P" : "",
2089 bgpa.bgpa_flags & 0x10 ? "E" : "");
2090 if (bgpa.bgpa_flags & 0xf)
2091 printf("+%x", bgpa.bgpa_flags & 0xf);
2092 printf("]: ");
2093 }
2094 if (!bgp_attr_print(&bgpa, &p[i + aoff], alen))
2095 goto trunc;
2096 i += aoff + alen;
2097 }
2098 }
2099 p += 2 + len;
2100
2101 if (dat + length > p) {
2102 printf("\n\t Updated routes:");
2103 while (dat + length > p) {
2104 char buf[MAXHOSTNAMELEN + 100];
2105 i = decode_prefix4(p, buf, sizeof(buf));
2106 if (i == -1) {
2107 printf("\n\t (illegal prefix length)");
2108 break;
2109 } else if (i == -2)
2110 goto trunc;
2111 else {
2112 printf("\n\t %s", buf);
2113 p += i;
2114 }
2115 }
2116 }
2117 return;
2118 trunc:
2119 printf("[|BGP]");
2120 }
2121
2122 static void
2123 bgp_notification_print(const u_char *dat, int length)
2124 {
2125 struct bgp_notification bgpn;
2126 const u_char *tptr;
2127 char tokbuf[TOKBUFSIZE];
2128 char tokbuf2[TOKBUFSIZE];
2129
2130 TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
2131 memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
2132
2133 /* some little sanity checking */
2134 if (length<BGP_NOTIFICATION_SIZE)
2135 return;
2136
2137 printf(", %s (%u)",
2138 tok2strbuf(bgp_notify_major_values, "Unknown Error",
2139 bgpn.bgpn_major, tokbuf, sizeof(tokbuf)),
2140 bgpn.bgpn_major);
2141
2142 switch (bgpn.bgpn_major) {
2143
2144 case BGP_NOTIFY_MAJOR_MSG:
2145 printf(", subcode %s (%u)",
2146 tok2strbuf(bgp_notify_minor_msg_values, "Unknown",
2147 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2148 bgpn.bgpn_minor);
2149 break;
2150 case BGP_NOTIFY_MAJOR_OPEN:
2151 printf(", subcode %s (%u)",
2152 tok2strbuf(bgp_notify_minor_open_values, "Unknown",
2153 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2154 bgpn.bgpn_minor);
2155 break;
2156 case BGP_NOTIFY_MAJOR_UPDATE:
2157 printf(", subcode %s (%u)",
2158 tok2strbuf(bgp_notify_minor_update_values, "Unknown",
2159 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2160 bgpn.bgpn_minor);
2161 break;
2162 case BGP_NOTIFY_MAJOR_CAP:
2163 printf(" subcode %s (%u)",
2164 tok2strbuf(bgp_notify_minor_cap_values, "Unknown",
2165 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2166 bgpn.bgpn_minor);
2167 case BGP_NOTIFY_MAJOR_CEASE:
2168 printf(", subcode %s (%u)",
2169 tok2strbuf(bgp_notify_minor_cease_values, "Unknown",
2170 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2171 bgpn.bgpn_minor);
2172
2173 /* draft-ietf-idr-cease-subcode-02 mentions optionally 7 bytes
2174 * for the maxprefix subtype, which may contain AFI, SAFI and MAXPREFIXES
2175 */
2176 if(bgpn.bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= BGP_NOTIFICATION_SIZE + 7) {
2177 tptr = dat + BGP_NOTIFICATION_SIZE;
2178 TCHECK2(*tptr, 7);
2179 printf(", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
2180 tok2strbuf(af_values, "Unknown",
2181 EXTRACT_16BITS(tptr), tokbuf, sizeof(tokbuf)),
2182 EXTRACT_16BITS(tptr),
2183 tok2strbuf(bgp_safi_values, "Unknown", *(tptr+2),
2184 tokbuf2, sizeof(tokbuf)),
2185 *(tptr+2),
2186 EXTRACT_32BITS(tptr+3));
2187 }
2188 break;
2189 default:
2190 break;
2191 }
2192
2193 return;
2194 trunc:
2195 printf("[|BGP]");
2196 }
2197
2198 static void
2199 bgp_route_refresh_print(const u_char *pptr, int len) {
2200
2201 const struct bgp_route_refresh *bgp_route_refresh_header;
2202 char tokbuf[TOKBUFSIZE];
2203 char tokbuf2[TOKBUFSIZE];
2204
2205 TCHECK2(pptr[0], BGP_ROUTE_REFRESH_SIZE);
2206
2207 /* some little sanity checking */
2208 if (len<BGP_ROUTE_REFRESH_SIZE)
2209 return;
2210
2211 bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
2212
2213 printf("\n\t AFI %s (%u), SAFI %s (%u)",
2214 tok2strbuf(af_values,"Unknown",
2215 /* this stinks but the compiler pads the structure
2216 * weird */
2217 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
2218 tokbuf, sizeof(tokbuf)),
2219 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
2220 tok2strbuf(bgp_safi_values,"Unknown",
2221 bgp_route_refresh_header->safi,
2222 tokbuf2, sizeof(tokbuf2)),
2223 bgp_route_refresh_header->safi);
2224
2225 if (vflag > 1) {
2226 TCHECK2(*pptr, len);
2227 print_unknown_data(pptr,"\n\t ", len);
2228 }
2229
2230 return;
2231 trunc:
2232 printf("[|BGP]");
2233 }
2234
2235 static int
2236 bgp_header_print(const u_char *dat, int length)
2237 {
2238 struct bgp bgp;
2239 char tokbuf[TOKBUFSIZE];
2240
2241 TCHECK2(dat[0], BGP_SIZE);
2242 memcpy(&bgp, dat, BGP_SIZE);
2243 printf("\n\t%s Message (%u), length: %u",
2244 tok2strbuf(bgp_msg_values, "Unknown", bgp.bgp_type,
2245 tokbuf, sizeof(tokbuf)),
2246 bgp.bgp_type,
2247 length);
2248
2249 switch (bgp.bgp_type) {
2250 case BGP_OPEN:
2251 bgp_open_print(dat, length);
2252 break;
2253 case BGP_UPDATE:
2254 bgp_update_print(dat, length);
2255 break;
2256 case BGP_NOTIFICATION:
2257 bgp_notification_print(dat, length);
2258 break;
2259 case BGP_KEEPALIVE:
2260 break;
2261 case BGP_ROUTE_REFRESH:
2262 bgp_route_refresh_print(dat, length);
2263 break;
2264 default:
2265 /* we have no decoder for the BGP message */
2266 TCHECK2(*dat, length);
2267 printf("\n\t no Message %u decoder",bgp.bgp_type);
2268 print_unknown_data(dat,"\n\t ",length);
2269 break;
2270 }
2271 return 1;
2272 trunc:
2273 printf("[|BGP]");
2274 return 0;
2275 }
2276
2277 void
2278 bgp_print(const u_char *dat, int length)
2279 {
2280 const u_char *p;
2281 const u_char *ep;
2282 const u_char *start;
2283 const u_char marker[] = {
2284 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
2285 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
2286 };
2287 struct bgp bgp;
2288 u_int16_t hlen;
2289 char tokbuf[TOKBUFSIZE];
2290
2291 ep = dat + length;
2292 if (snapend < dat + length)
2293 ep = snapend;
2294
2295 printf(": BGP, length: %u",length);
2296
2297 if (vflag < 1) /* lets be less chatty */
2298 return;
2299
2300 p = dat;
2301 start = p;
2302 while (p < ep) {
2303 if (!TTEST2(p[0], 1))
2304 break;
2305 if (p[0] != 0xff) {
2306 p++;
2307 continue;
2308 }
2309
2310 if (!TTEST2(p[0], sizeof(marker)))
2311 break;
2312 if (memcmp(p, marker, sizeof(marker)) != 0) {
2313 p++;
2314 continue;
2315 }
2316
2317 /* found BGP header */
2318 TCHECK2(p[0], BGP_SIZE); /*XXX*/
2319 memcpy(&bgp, p, BGP_SIZE);
2320
2321 if (start != p)
2322 printf(" [|BGP]");
2323
2324 hlen = ntohs(bgp.bgp_len);
2325 if (hlen < BGP_SIZE) {
2326 printf("\n[|BGP Bogus header length %u < %u]", hlen,
2327 BGP_SIZE);
2328 break;
2329 }
2330
2331 if (TTEST2(p[0], hlen)) {
2332 if (!bgp_header_print(p, hlen))
2333 return;
2334 p += hlen;
2335 start = p;
2336 } else {
2337 printf("\n[|BGP %s]",
2338 tok2strbuf(bgp_msg_values,
2339 "Unknown Message Type",
2340 bgp.bgp_type,
2341 tokbuf, sizeof(tokbuf)));
2342 break;
2343 }
2344 }
2345
2346 return;
2347
2348 trunc:
2349 printf(" [|BGP]");
2350 }
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