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dma: bump man page date
[dragonfly.git] / contrib / tcpdump / print-bgp.c
blob2dfdf52e0787659b2ee2424b02c9e7c19ed70788
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 1.117.2.1 2007-12-08 10:08:07 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_AS4_PATH 17 /* RFC4893 */
149 #define BGPTYPE_AGGREGATOR4 18 /* RFC4893 */
150 #define BGPTYPE_PMSI_TUNNEL 22 /* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */
151 #define BGPTYPE_ATTR_SET 128 /* draft-marques-ppvpn-ibgp */
152
153 #define BGP_MP_NLRI_MINSIZE 3 /* End of RIB Marker detection */
154
155 static struct tok bgp_attr_values[] = {
156 { BGPTYPE_ORIGIN, "Origin"},
157 { BGPTYPE_AS_PATH, "AS Path"},
158 { BGPTYPE_AS4_PATH, "AS4 Path"},
159 { BGPTYPE_NEXT_HOP, "Next Hop"},
160 { BGPTYPE_MULTI_EXIT_DISC, "Multi Exit Discriminator"},
161 { BGPTYPE_LOCAL_PREF, "Local Preference"},
162 { BGPTYPE_ATOMIC_AGGREGATE, "Atomic Aggregate"},
163 { BGPTYPE_AGGREGATOR, "Aggregator"},
164 { BGPTYPE_AGGREGATOR4, "Aggregator4"},
165 { BGPTYPE_COMMUNITIES, "Community"},
166 { BGPTYPE_ORIGINATOR_ID, "Originator ID"},
167 { BGPTYPE_CLUSTER_LIST, "Cluster List"},
168 { BGPTYPE_DPA, "DPA"},
169 { BGPTYPE_ADVERTISERS, "Advertisers"},
170 { BGPTYPE_RCID_PATH, "RCID Path / Cluster ID"},
171 { BGPTYPE_MP_REACH_NLRI, "Multi-Protocol Reach NLRI"},
172 { BGPTYPE_MP_UNREACH_NLRI, "Multi-Protocol Unreach NLRI"},
173 { BGPTYPE_EXTD_COMMUNITIES, "Extended Community"},
174 { BGPTYPE_PMSI_TUNNEL, "PMSI Tunnel"},
175 { BGPTYPE_ATTR_SET, "Attribute Set"},
176 { 255, "Reserved for development"},
177 { 0, NULL}
178 };
179
180 #define BGP_AS_SET 1
181 #define BGP_AS_SEQUENCE 2
182 #define BGP_CONFED_AS_SEQUENCE 3 /* draft-ietf-idr-rfc3065bis-01 */
183 #define BGP_CONFED_AS_SET 4 /* draft-ietf-idr-rfc3065bis-01 */
184
185 #define BGP_AS_SEG_TYPE_MIN BGP_AS_SET
186 #define BGP_AS_SEG_TYPE_MAX BGP_CONFED_AS_SET
187
188 static struct tok bgp_as_path_segment_open_values[] = {
189 { BGP_AS_SEQUENCE, ""},
190 { BGP_AS_SET, "{ "},
191 { BGP_CONFED_AS_SEQUENCE, "( "},
192 { BGP_CONFED_AS_SET, "({ "},
193 { 0, NULL}
194 };
195
196 static struct tok bgp_as_path_segment_close_values[] = {
197 { BGP_AS_SEQUENCE, ""},
198 { BGP_AS_SET, "}"},
199 { BGP_CONFED_AS_SEQUENCE, ")"},
200 { BGP_CONFED_AS_SET, "})"},
201 { 0, NULL}
202 };
203
204 #define BGP_OPT_AUTH 1
205 #define BGP_OPT_CAP 2
206
207
208 static struct tok bgp_opt_values[] = {
209 { BGP_OPT_AUTH, "Authentication Information"},
210 { BGP_OPT_CAP, "Capabilities Advertisement"},
211 { 0, NULL}
212 };
213
214 #define BGP_CAPCODE_MP 1
215 #define BGP_CAPCODE_RR 2
216 #define BGP_CAPCODE_ORF 3 /* XXX */
217 #define BGP_CAPCODE_RESTART 64 /* draft-ietf-idr-restart-05 */
218 #define BGP_CAPCODE_AS_NEW 65 /* XXX */
219 #define BGP_CAPCODE_DYN_CAP 67 /* XXX */
220 #define BGP_CAPCODE_RR_CISCO 128
221
222 static struct tok bgp_capcode_values[] = {
223 { BGP_CAPCODE_MP, "Multiprotocol Extensions"},
224 { BGP_CAPCODE_RR, "Route Refresh"},
225 { BGP_CAPCODE_ORF, "Cooperative Route Filtering"},
226 { BGP_CAPCODE_RESTART, "Graceful Restart"},
227 { BGP_CAPCODE_AS_NEW, "32-Bit AS Number"},
228 { BGP_CAPCODE_DYN_CAP, "Dynamic Capability"},
229 { BGP_CAPCODE_RR_CISCO, "Route Refresh (Cisco)"},
230 { 0, NULL}
231 };
232
233 #define BGP_NOTIFY_MAJOR_MSG 1
234 #define BGP_NOTIFY_MAJOR_OPEN 2
235 #define BGP_NOTIFY_MAJOR_UPDATE 3
236 #define BGP_NOTIFY_MAJOR_HOLDTIME 4
237 #define BGP_NOTIFY_MAJOR_FSM 5
238 #define BGP_NOTIFY_MAJOR_CEASE 6
239 #define BGP_NOTIFY_MAJOR_CAP 7
240
241 static struct tok bgp_notify_major_values[] = {
242 { BGP_NOTIFY_MAJOR_MSG, "Message Header Error"},
243 { BGP_NOTIFY_MAJOR_OPEN, "OPEN Message Error"},
244 { BGP_NOTIFY_MAJOR_UPDATE, "UPDATE Message Error"},
245 { BGP_NOTIFY_MAJOR_HOLDTIME,"Hold Timer Expired"},
246 { BGP_NOTIFY_MAJOR_FSM, "Finite State Machine Error"},
247 { BGP_NOTIFY_MAJOR_CEASE, "Cease"},
248 { BGP_NOTIFY_MAJOR_CAP, "Capability Message Error"},
249 { 0, NULL}
250 };
251
252 /* draft-ietf-idr-cease-subcode-02 */
253 #define BGP_NOTIFY_MINOR_CEASE_MAXPRFX 1
254 static struct tok bgp_notify_minor_cease_values[] = {
255 { BGP_NOTIFY_MINOR_CEASE_MAXPRFX, "Maximum Number of Prefixes Reached"},
256 { 2, "Administratively Shutdown"},
257 { 3, "Peer Unconfigured"},
258 { 4, "Administratively Reset"},
259 { 5, "Connection Rejected"},
260 { 6, "Other Configuration Change"},
261 { 7, "Connection Collision Resolution"},
262 { 0, NULL}
263 };
264
265 static struct tok bgp_notify_minor_msg_values[] = {
266 { 1, "Connection Not Synchronized"},
267 { 2, "Bad Message Length"},
268 { 3, "Bad Message Type"},
269 { 0, NULL}
270 };
271
272 static struct tok bgp_notify_minor_open_values[] = {
273 { 1, "Unsupported Version Number"},
274 { 2, "Bad Peer AS"},
275 { 3, "Bad BGP Identifier"},
276 { 4, "Unsupported Optional Parameter"},
277 { 5, "Authentication Failure"},
278 { 6, "Unacceptable Hold Time"},
279 { 7, "Capability Message Error"},
280 { 0, NULL}
281 };
282
283 static struct tok bgp_notify_minor_update_values[] = {
284 { 1, "Malformed Attribute List"},
285 { 2, "Unrecognized Well-known Attribute"},
286 { 3, "Missing Well-known Attribute"},
287 { 4, "Attribute Flags Error"},
288 { 5, "Attribute Length Error"},
289 { 6, "Invalid ORIGIN Attribute"},
290 { 7, "AS Routing Loop"},
291 { 8, "Invalid NEXT_HOP Attribute"},
292 { 9, "Optional Attribute Error"},
293 { 10, "Invalid Network Field"},
294 { 11, "Malformed AS_PATH"},
295 { 0, NULL}
296 };
297
298 static struct tok bgp_notify_minor_cap_values[] = {
299 { 1, "Invalid Action Value" },
300 { 2, "Invalid Capability Length" },
301 { 3, "Malformed Capability Value" },
302 { 4, "Unsupported Capability Code" },
303 { 0, NULL }
304 };
305
306 static struct tok bgp_origin_values[] = {
307 { 0, "IGP"},
308 { 1, "EGP"},
309 { 2, "Incomplete"},
310 { 0, NULL}
311 };
312
313 #define BGP_PMSI_TUNNEL_RSVP_P2MP 1
314 #define BGP_PMSI_TUNNEL_LDP_P2MP 2
315 #define BGP_PMSI_TUNNEL_PIM_SSM 3
316 #define BGP_PMSI_TUNNEL_PIM_SM 4
317 #define BGP_PMSI_TUNNEL_PIM_BIDIR 5
318 #define BGP_PMSI_TUNNEL_INGRESS 6
319 #define BGP_PMSI_TUNNEL_LDP_MP2MP 7
320
321 static struct tok bgp_pmsi_tunnel_values[] = {
322 { BGP_PMSI_TUNNEL_RSVP_P2MP, "RSVP-TE P2MP LSP"},
323 { BGP_PMSI_TUNNEL_LDP_P2MP, "LDP P2MP LSP"},
324 { BGP_PMSI_TUNNEL_PIM_SSM, "PIM-SSM Tree"},
325 { BGP_PMSI_TUNNEL_PIM_SM, "PIM-SM Tree"},
326 { BGP_PMSI_TUNNEL_PIM_BIDIR, "PIM-Bidir Tree"},
327 { BGP_PMSI_TUNNEL_INGRESS, "Ingress Replication"},
328 { BGP_PMSI_TUNNEL_LDP_MP2MP, "LDP MP2MP LSP"},
329 { 0, NULL}
330 };
331
332 static struct tok bgp_pmsi_flag_values[] = {
333 { 0x01, "Leaf Information required"},
334 { 0, NULL}
335 };
336
337
338 /* Subsequent address family identifier, RFC2283 section 7 */
339 #define SAFNUM_RES 0
340 #define SAFNUM_UNICAST 1
341 #define SAFNUM_MULTICAST 2
342 #define SAFNUM_UNIMULTICAST 3
343 /* labeled BGP RFC3107 */
344 #define SAFNUM_LABUNICAST 4
345 /* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */
346 #define SAFNUM_MULTICAST_VPN 5
347 #define SAFNUM_TUNNEL 64 /* XXX */
348 #define SAFNUM_VPLS 65 /* XXX */
349 #define SAFNUM_MDT 66 /* XXX */
350 /* Section 4.3.4 of draft-rosen-rfc2547bis-03.txt */
351 #define SAFNUM_VPNUNICAST 128
352 #define SAFNUM_VPNMULTICAST 129
353 #define SAFNUM_VPNUNIMULTICAST 130
354 /* draft-marques-ppvpn-rt-constrain-01.txt */
355 #define SAFNUM_RT_ROUTING_INFO 132
356
357 #define BGP_VPN_RD_LEN 8
358
359 static struct tok bgp_safi_values[] = {
360 { SAFNUM_RES, "Reserved"},
361 { SAFNUM_UNICAST, "Unicast"},
362 { SAFNUM_MULTICAST, "Multicast"},
363 { SAFNUM_UNIMULTICAST, "Unicast+Multicast"},
364 { SAFNUM_LABUNICAST, "labeled Unicast"},
365 { SAFNUM_TUNNEL, "Tunnel"},
366 { SAFNUM_VPLS, "VPLS"},
367 { SAFNUM_MDT, "MDT"},
368 { SAFNUM_VPNUNICAST, "labeled VPN Unicast"},
369 { SAFNUM_VPNMULTICAST, "labeled VPN Multicast"},
370 { SAFNUM_VPNUNIMULTICAST, "labeled VPN Unicast+Multicast"},
371 { SAFNUM_RT_ROUTING_INFO, "Route Target Routing Information"},
372 { SAFNUM_MULTICAST_VPN, "Multicast VPN"},
373 { 0, NULL }
374 };
375
376 /* well-known community */
377 #define BGP_COMMUNITY_NO_EXPORT 0xffffff01
378 #define BGP_COMMUNITY_NO_ADVERT 0xffffff02
379 #define BGP_COMMUNITY_NO_EXPORT_SUBCONFED 0xffffff03
380
381 /* Extended community type - draft-ietf-idr-bgp-ext-communities-05 */
382 #define BGP_EXT_COM_RT_0 0x0002 /* Route Target,Format AS(2bytes):AN(4bytes) */
383 #define BGP_EXT_COM_RT_1 0x0102 /* Route Target,Format IP address:AN(2bytes) */
384 #define BGP_EXT_COM_RT_2 0x0202 /* Route Target,Format AN(4bytes):local(2bytes) */
385 #define BGP_EXT_COM_RO_0 0x0003 /* Route Origin,Format AS(2bytes):AN(4bytes) */
386 #define BGP_EXT_COM_RO_1 0x0103 /* Route Origin,Format IP address:AN(2bytes) */
387 #define BGP_EXT_COM_RO_2 0x0203 /* Route Origin,Format AN(4bytes):local(2bytes) */
388 #define BGP_EXT_COM_LINKBAND 0x4004 /* Link Bandwidth,Format AS(2B):Bandwidth(4B) */
389 /* rfc2547 bgp-mpls-vpns */
390 #define BGP_EXT_COM_VPN_ORIGIN 0x0005 /* OSPF Domain ID / VPN of Origin - draft-rosen-vpns-ospf-bgp-mpls */
391 #define BGP_EXT_COM_VPN_ORIGIN2 0x0105 /* duplicate - keep for backwards compatability */
392 #define BGP_EXT_COM_VPN_ORIGIN3 0x0205 /* duplicate - keep for backwards compatability */
393 #define BGP_EXT_COM_VPN_ORIGIN4 0x8005 /* duplicate - keep for backwards compatability */
394
395 #define BGP_EXT_COM_OSPF_RTYPE 0x0306 /* OSPF Route Type,Format Area(4B):RouteType(1B):Options(1B) */
396 #define BGP_EXT_COM_OSPF_RTYPE2 0x8000 /* duplicate - keep for backwards compatability */
397
398 #define BGP_EXT_COM_OSPF_RID 0x0107 /* OSPF Router ID,Format RouterID(4B):Unused(2B) */
399 #define BGP_EXT_COM_OSPF_RID2 0x8001 /* duplicate - keep for backwards compatability */
400
401 #define BGP_EXT_COM_L2INFO 0x800a /* draft-kompella-ppvpn-l2vpn */
402
403 #define BGP_EXT_COM_SOURCE_AS 0x0009 /* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */
404 #define BGP_EXT_COM_VRF_RT_IMP 0x010a /* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */
405
406 /* http://www.cisco.com/en/US/tech/tk436/tk428/technologies_tech_note09186a00801eb09a.shtml */
407 #define BGP_EXT_COM_EIGRP_GEN 0x8800
408 #define BGP_EXT_COM_EIGRP_METRIC_AS_DELAY 0x8801
409 #define BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW 0x8802
410 #define BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU 0x8803
411 #define BGP_EXT_COM_EIGRP_EXT_REMAS_REMID 0x8804
412 #define BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC 0x8805
413
414 static struct tok bgp_extd_comm_flag_values[] = {
415 { 0x8000, "vendor-specific"},
416 { 0x4000, "non-transitive"},
417 { 0, NULL},
418 };
419
420 static struct tok bgp_extd_comm_subtype_values[] = {
421 { BGP_EXT_COM_RT_0, "target"},
422 { BGP_EXT_COM_RT_1, "target"},
423 { BGP_EXT_COM_RT_2, "target"},
424 { BGP_EXT_COM_RO_0, "origin"},
425 { BGP_EXT_COM_RO_1, "origin"},
426 { BGP_EXT_COM_RO_2, "origin"},
427 { BGP_EXT_COM_LINKBAND, "link-BW"},
428 { BGP_EXT_COM_VPN_ORIGIN, "ospf-domain"},
429 { BGP_EXT_COM_VPN_ORIGIN2, "ospf-domain"},
430 { BGP_EXT_COM_VPN_ORIGIN3, "ospf-domain"},
431 { BGP_EXT_COM_VPN_ORIGIN4, "ospf-domain"},
432 { BGP_EXT_COM_OSPF_RTYPE, "ospf-route-type"},
433 { BGP_EXT_COM_OSPF_RTYPE2, "ospf-route-type"},
434 { BGP_EXT_COM_OSPF_RID, "ospf-router-id"},
435 { BGP_EXT_COM_OSPF_RID2, "ospf-router-id"},
436 { BGP_EXT_COM_L2INFO, "layer2-info"},
437 { BGP_EXT_COM_EIGRP_GEN , "eigrp-general-route (flag, tag)" },
438 { BGP_EXT_COM_EIGRP_METRIC_AS_DELAY , "eigrp-route-metric (AS, delay)" },
439 { BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW , "eigrp-route-metric (reliability, nexthop, bandwidth)" },
440 { BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU , "eigrp-route-metric (load, MTU)" },
441 { BGP_EXT_COM_EIGRP_EXT_REMAS_REMID , "eigrp-external-route (remote-AS, remote-ID)" },
442 { BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC , "eigrp-external-route (remote-proto, remote-metric)" },
443 { BGP_EXT_COM_SOURCE_AS, "source-AS" },
444 { BGP_EXT_COM_VRF_RT_IMP, "vrf-route-import"},
445 { 0, NULL},
446 };
447
448 /* OSPF codes for BGP_EXT_COM_OSPF_RTYPE draft-rosen-vpns-ospf-bgp-mpls */
449 #define BGP_OSPF_RTYPE_RTR 1 /* OSPF Router LSA */
450 #define BGP_OSPF_RTYPE_NET 2 /* OSPF Network LSA */
451 #define BGP_OSPF_RTYPE_SUM 3 /* OSPF Summary LSA */
452 #define BGP_OSPF_RTYPE_EXT 5 /* OSPF External LSA, note that ASBR doesn't apply to MPLS-VPN */
453 #define BGP_OSPF_RTYPE_NSSA 7 /* OSPF NSSA External*/
454 #define BGP_OSPF_RTYPE_SHAM 129 /* OSPF-MPLS-VPN Sham link */
455 #define BGP_OSPF_RTYPE_METRIC_TYPE 0x1 /* LSB of RTYPE Options Field */
456
457 static struct tok bgp_extd_comm_ospf_rtype_values[] = {
458 { BGP_OSPF_RTYPE_RTR, "Router" },
459 { BGP_OSPF_RTYPE_NET, "Network" },
460 { BGP_OSPF_RTYPE_SUM, "Summary" },
461 { BGP_OSPF_RTYPE_EXT, "External" },
462 { BGP_OSPF_RTYPE_NSSA,"NSSA External" },
463 { BGP_OSPF_RTYPE_SHAM,"MPLS-VPN Sham" },
464 { 0, NULL },
465 };
466
467 int
468 decode_prefix4(const u_char *pptr, char *buf, u_int buflen)
469 {
470 struct in_addr addr;
471 u_int plen;
472
473 TCHECK(pptr[0]);
474 plen = pptr[0];
475 if (32 < plen)
476 return -1;
477
478 memset(&addr, 0, sizeof(addr));
479 TCHECK2(pptr[1], (plen + 7) / 8);
480 memcpy(&addr, &pptr[1], (plen + 7) / 8);
481 if (plen % 8) {
482 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
483 ((0xff00 >> (plen % 8)) & 0xff);
484 }
485 snprintf(buf, buflen, "%s/%d", getname((u_char *)&addr), plen);
486 return 1 + (plen + 7) / 8;
487
488 trunc:
489 return -2;
490 }
491
492 static int
493 decode_labeled_prefix4(const u_char *pptr, char *buf, u_int buflen)
494 {
495 struct in_addr addr;
496 u_int plen;
497
498 TCHECK(pptr[0]);
499 plen = pptr[0]; /* get prefix length */
500
501 /* this is one of the weirdnesses of rfc3107
502 the label length (actually the label + COS bits)
503 is added to the prefix length;
504 we also do only read out just one label -
505 there is no real application for advertisement of
506 stacked labels in a a single BGP message
507 */
508
509 if (24 > plen)
510 return -1;
511
512 plen-=24; /* adjust prefixlen - labellength */
513
514 if (32 < plen)
515 return -1;
516
517 memset(&addr, 0, sizeof(addr));
518 TCHECK2(pptr[4], (plen + 7) / 8);
519 memcpy(&addr, &pptr[4], (plen + 7) / 8);
520 if (plen % 8) {
521 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
522 ((0xff00 >> (plen % 8)) & 0xff);
523 }
524 /* the label may get offsetted by 4 bits so lets shift it right */
525 snprintf(buf, buflen, "%s/%d, label:%u %s",
526 getname((u_char *)&addr),
527 plen,
528 EXTRACT_24BITS(pptr+1)>>4,
529 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
530
531 return 4 + (plen + 7) / 8;
532
533 trunc:
534 return -2;
535 }
536
537 /*
538 * bgp_vpn_ip_print
539 *
540 * print an ipv4 or ipv6 address into a buffer dependend on address length.
541 */
542 static char *
543 bgp_vpn_ip_print (const u_char *pptr, u_int addr_length) {
544
545 /* worst case string is s fully formatted v6 address */
546 static char addr[sizeof("1234:5678:89ab:cdef:1234:5678:89ab:cdef")];
547 char *pos = addr;
548
549 switch(addr_length) {
550 case (sizeof(struct in_addr) << 3): /* 32 */
551 TCHECK2(pptr[0], sizeof(struct in_addr));
552 snprintf(pos, sizeof(addr), "%s", ipaddr_string(pptr));
553 break;
554 #ifdef INET6
555 case (sizeof(struct in6_addr) << 3): /* 128 */
556 TCHECK2(pptr[0], sizeof(struct in6_addr));
557 snprintf(pos, sizeof(addr), "%s", ip6addr_string(pptr));
558 break;
559 #endif
560 default:
561 snprintf(pos, sizeof(addr), "bogus address length %u", addr_length);
562 break;
563 }
564 pos += strlen(pos);
565
566 trunc:
567 *(pos) = '\0';
568 return (addr);
569 }
570
571 /*
572 * bgp_vpn_sg_print
573 *
574 * print an multicast s,g entry into a buffer.
575 * the s,g entry is encoded like this.
576 *
577 * +-----------------------------------+
578 * | Multicast Source Length (1 octet) |
579 * +-----------------------------------+
580 * | Multicast Source (Variable) |
581 * +-----------------------------------+
582 * | Multicast Group Length (1 octet) |
583 * +-----------------------------------+
584 * | Multicast Group (Variable) |
585 * +-----------------------------------+
586 *
587 * return the number of bytes read from the wire.
588 */
589 static int
590 bgp_vpn_sg_print (const u_char *pptr, char *buf, u_int buflen) {
591
592 u_int8_t addr_length;
593 u_int total_length, offset;
594
595 total_length = 0;
596
597 /* Source address length, encoded in bits */
598 TCHECK2(pptr[0], 1);
599 addr_length = *pptr++;
600
601 /* Source address */
602 TCHECK2(pptr[0], (addr_length >> 3));
603 total_length += (addr_length >> 3) + 1;
604 offset = strlen(buf);
605 if (addr_length) {
606 snprintf(buf + offset, buflen - offset, ", Source %s",
607 bgp_vpn_ip_print(pptr, addr_length));
608 pptr += (addr_length >> 3);
609 }
610
611 /* Group address length, encoded in bits */
612 TCHECK2(pptr[0], 1);
613 addr_length = *pptr++;
614
615 /* Group address */
616 TCHECK2(pptr[0], (addr_length >> 3));
617 total_length += (addr_length >> 3) + 1;
618 offset = strlen(buf);
619 if (addr_length) {
620 snprintf(buf + offset, buflen - offset, ", Group %s",
621 bgp_vpn_ip_print(pptr, addr_length));
622 pptr += (addr_length >> 3);
623 }
624
625 trunc:
626 return (total_length);
627 }
628
629
630 /* RDs and RTs share the same semantics
631 * we use bgp_vpn_rd_print for
632 * printing route targets inside a NLRI */
633 char *
634 bgp_vpn_rd_print (const u_char *pptr) {
635
636 /* allocate space for the largest possible string */
637 static char rd[sizeof("xxxxxxxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")];
638 char *pos = rd;
639
640 /* ok lets load the RD format */
641 switch (EXTRACT_16BITS(pptr)) {
642
643 /* 2-byte-AS:number fmt*/
644 case 0:
645 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u (= %u.%u.%u.%u)",
646 EXTRACT_16BITS(pptr+2),
647 EXTRACT_32BITS(pptr+4),
648 *(pptr+4), *(pptr+5), *(pptr+6), *(pptr+7));
649 break;
650 /* IP-address:AS fmt*/
651
652 case 1:
653 snprintf(pos, sizeof(rd) - (pos - rd), "%u.%u.%u.%u:%u",
654 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
655 break;
656
657 /* 4-byte-AS:number fmt*/
658 case 2:
659 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u (%u.%u.%u.%u:%u)",
660 EXTRACT_32BITS(pptr+2), EXTRACT_16BITS(pptr+6),
661 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
662 break;
663 default:
664 snprintf(pos, sizeof(rd) - (pos - rd), "unknown RD format");
665 break;
666 }
667 pos += strlen(pos);
668 *(pos) = '\0';
669 return (rd);
670 }
671
672 static int
673 decode_rt_routing_info(const u_char *pptr, char *buf, u_int buflen)
674 {
675 u_int8_t route_target[8];
676 u_int plen;
677
678 TCHECK(pptr[0]);
679 plen = pptr[0]; /* get prefix length */
680
681 if (0 == plen)
682 return 1; /* default route target */
683
684 if (32 > plen)
685 return -1;
686
687 plen-=32; /* adjust prefix length */
688
689 if (64 < plen)
690 return -1;
691
692 memset(&route_target, 0, sizeof(route_target));
693 TCHECK2(pptr[1], (plen + 7) / 8);
694 memcpy(&route_target, &pptr[1], (plen + 7) / 8);
695 if (plen % 8) {
696 ((u_char *)&route_target)[(plen + 7) / 8 - 1] &=
697 ((0xff00 >> (plen % 8)) & 0xff);
698 }
699 snprintf(buf, buflen, "origin AS: %u, route target %s",
700 EXTRACT_32BITS(pptr+1),
701 bgp_vpn_rd_print((u_char *)&route_target));
702
703 return 5 + (plen + 7) / 8;
704
705 trunc:
706 return -2;
707 }
708
709 static int
710 decode_labeled_vpn_prefix4(const u_char *pptr, char *buf, u_int buflen)
711 {
712 struct in_addr addr;
713 u_int plen;
714
715 TCHECK(pptr[0]);
716 plen = pptr[0]; /* get prefix length */
717
718 if ((24+64) > plen)
719 return -1;
720
721 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
722
723 if (32 < plen)
724 return -1;
725
726 memset(&addr, 0, sizeof(addr));
727 TCHECK2(pptr[12], (plen + 7) / 8);
728 memcpy(&addr, &pptr[12], (plen + 7) / 8);
729 if (plen % 8) {
730 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
731 ((0xff00 >> (plen % 8)) & 0xff);
732 }
733 /* the label may get offsetted by 4 bits so lets shift it right */
734 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
735 bgp_vpn_rd_print(pptr+4),
736 getname((u_char *)&addr),
737 plen,
738 EXTRACT_24BITS(pptr+1)>>4,
739 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
740
741 return 12 + (plen + 7) / 8;
742
743 trunc:
744 return -2;
745 }
746
747 #define BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI 1
748 #define BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI 2
749 #define BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI 3
750 #define BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF 4
751 #define BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE 5
752 #define BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN 6
753 #define BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN 7
754
755 static struct tok bgp_multicast_vpn_route_type_values[] = {
756 { BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI, "Intra-AS I-PMSI"},
757 { BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI, "Inter-AS I-PMSI"},
758 { BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI, "S-PMSI"},
759 { BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF, "Intra-AS Segment-Leaf"},
760 { BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE, "Source-Active"},
761 { BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN, "Shared Tree Join"},
762 { BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN, "Source Tree Join"},
763 };
764
765 static int
766 decode_multicast_vpn(const u_char *pptr, char *buf, u_int buflen)
767 {
768 u_int8_t route_type, route_length, addr_length, sg_length;
769 u_int offset;
770
771 TCHECK2(pptr[0], 2);
772 route_type = *pptr++;
773 route_length = *pptr++;
774
775 snprintf(buf, buflen, "Route-Type: %s (%u), length: %u",
776 tok2str(bgp_multicast_vpn_route_type_values,
777 "Unknown", route_type),
778 route_type, route_length);
779
780 switch(route_type) {
781 case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI:
782 TCHECK2(pptr[0], BGP_VPN_RD_LEN);
783 offset = strlen(buf);
784 snprintf(buf + offset, buflen - offset, ", RD: %s, Originator %s",
785 bgp_vpn_rd_print(pptr),
786 bgp_vpn_ip_print(pptr + BGP_VPN_RD_LEN,
787 (route_length - BGP_VPN_RD_LEN) << 3));
788 break;
789 case BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI:
790 TCHECK2(pptr[0], BGP_VPN_RD_LEN + 4);
791 offset = strlen(buf);
792 snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %u",
793 bgp_vpn_rd_print(pptr),
794 EXTRACT_32BITS(pptr + BGP_VPN_RD_LEN));
795 break;
796
797 case BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI:
798 TCHECK2(pptr[0], BGP_VPN_RD_LEN);
799 offset = strlen(buf);
800 snprintf(buf + offset, buflen - offset, ", RD: %s",
801 bgp_vpn_rd_print(pptr));
802 pptr += BGP_VPN_RD_LEN;
803
804 sg_length = bgp_vpn_sg_print(pptr, buf, buflen);
805 addr_length = route_length - sg_length;
806
807 TCHECK2(pptr[0], addr_length);
808 offset = strlen(buf);
809 snprintf(buf + offset, buflen - offset, ", Originator %s",
810 bgp_vpn_ip_print(pptr, addr_length << 3));
811 break;
812
813 case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE:
814 TCHECK2(pptr[0], BGP_VPN_RD_LEN);
815 offset = strlen(buf);
816 snprintf(buf + offset, buflen - offset, ", RD: %s",
817 bgp_vpn_rd_print(pptr));
818 pptr += BGP_VPN_RD_LEN;
819
820 bgp_vpn_sg_print(pptr, buf, buflen);
821 break;
822
823 case BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN: /* fall through */
824 case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN:
825 TCHECK2(pptr[0], BGP_VPN_RD_LEN);
826 offset = strlen(buf);
827 snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %u",
828 bgp_vpn_rd_print(pptr),
829 EXTRACT_32BITS(pptr + BGP_VPN_RD_LEN));
830 pptr += BGP_VPN_RD_LEN;
831
832 bgp_vpn_sg_print(pptr, buf, buflen);
833 break;
834
835 /*
836 * no per route-type printing yet.
837 */
838 case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF:
839 default:
840 break;
841 }
842
843 return route_length + 2;
844
845 trunc:
846 return -2;
847 }
848
849 /*
850 * As I remember, some versions of systems have an snprintf() that
851 * returns -1 if the buffer would have overflowed. If the return
852 * value is negative, set buflen to 0, to indicate that we've filled
853 * the buffer up.
854 *
855 * If the return value is greater than buflen, that means that
856 * the buffer would have overflowed; again, set buflen to 0 in
857 * that case.
858 */
859 #define UPDATE_BUF_BUFLEN(buf, buflen, strlen) \
860 if (strlen<0) \
861 buflen=0; \
862 else if ((u_int)strlen>buflen) \
863 buflen=0; \
864 else { \
865 buflen-=strlen; \
866 buf+=strlen; \
867 }
868
869 static int
870 decode_labeled_vpn_l2(const u_char *pptr, char *buf, u_int buflen)
871 {
872 int plen,tlen,strlen,tlv_type,tlv_len,ttlv_len;
873
874 TCHECK2(pptr[0], 2);
875 plen=EXTRACT_16BITS(pptr);
876 tlen=plen;
877 pptr+=2;
878 TCHECK2(pptr[0],15);
879 buf[0]='\0';
880 strlen=snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u",
881 bgp_vpn_rd_print(pptr),
882 EXTRACT_16BITS(pptr+8),
883 EXTRACT_16BITS(pptr+10),
884 EXTRACT_24BITS(pptr+12)>>4); /* the label is offsetted by 4 bits so lets shift it right */
885 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
886 pptr+=15;
887 tlen-=15;
888
889 /* ok now the variable part - lets read out TLVs*/
890 while (tlen>0) {
891 if (tlen < 3)
892 return -1;
893 TCHECK2(pptr[0], 3);
894 tlv_type=*pptr++;
895 tlv_len=EXTRACT_16BITS(pptr);
896 ttlv_len=tlv_len;
897 pptr+=2;
898
899 switch(tlv_type) {
900 case 1:
901 if (buflen!=0) {
902 strlen=snprintf(buf,buflen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
903 tlv_type,
904 tlv_len);
905 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
906 }
907 ttlv_len=ttlv_len/8+1; /* how many bytes do we need to read ? */
908 while (ttlv_len>0) {
909 TCHECK(pptr[0]);
910 if (buflen!=0) {
911 strlen=snprintf(buf,buflen, "%02x",*pptr++);
912 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
913 }
914 ttlv_len--;
915 }
916 break;
917 default:
918 if (buflen!=0) {
919 strlen=snprintf(buf,buflen, "\n\t\tunknown TLV #%u, length: %u",
920 tlv_type,
921 tlv_len);
922 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
923 }
924 break;
925 }
926 tlen-=(tlv_len<<3); /* the tlv-length is expressed in bits so lets shift it right */
927 }
928 return plen+2;
929
930 trunc:
931 return -2;
932 }
933
934 #ifdef INET6
935 int
936 decode_prefix6(const u_char *pd, char *buf, u_int buflen)
937 {
938 struct in6_addr addr;
939 u_int plen;
940
941 TCHECK(pd[0]);
942 plen = pd[0];
943 if (128 < plen)
944 return -1;
945
946 memset(&addr, 0, sizeof(addr));
947 TCHECK2(pd[1], (plen + 7) / 8);
948 memcpy(&addr, &pd[1], (plen + 7) / 8);
949 if (plen % 8) {
950 addr.s6_addr[(plen + 7) / 8 - 1] &=
951 ((0xff00 >> (plen % 8)) & 0xff);
952 }
953 snprintf(buf, buflen, "%s/%d", getname6((u_char *)&addr), plen);
954 return 1 + (plen + 7) / 8;
955
956 trunc:
957 return -2;
958 }
959
960 static int
961 decode_labeled_prefix6(const u_char *pptr, char *buf, u_int buflen)
962 {
963 struct in6_addr addr;
964 u_int plen;
965
966 TCHECK(pptr[0]);
967 plen = pptr[0]; /* get prefix length */
968
969 if (24 > plen)
970 return -1;
971
972 plen-=24; /* adjust prefixlen - labellength */
973
974 if (128 < plen)
975 return -1;
976
977 memset(&addr, 0, sizeof(addr));
978 TCHECK2(pptr[4], (plen + 7) / 8);
979 memcpy(&addr, &pptr[4], (plen + 7) / 8);
980 if (plen % 8) {
981 addr.s6_addr[(plen + 7) / 8 - 1] &=
982 ((0xff00 >> (plen % 8)) & 0xff);
983 }
984 /* the label may get offsetted by 4 bits so lets shift it right */
985 snprintf(buf, buflen, "%s/%d, label:%u %s",
986 getname6((u_char *)&addr),
987 plen,
988 EXTRACT_24BITS(pptr+1)>>4,
989 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
990
991 return 4 + (plen + 7) / 8;
992
993 trunc:
994 return -2;
995 }
996
997 static int
998 decode_labeled_vpn_prefix6(const u_char *pptr, char *buf, u_int buflen)
999 {
1000 struct in6_addr addr;
1001 u_int plen;
1002
1003 TCHECK(pptr[0]);
1004 plen = pptr[0]; /* get prefix length */
1005
1006 if ((24+64) > plen)
1007 return -1;
1008
1009 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
1010
1011 if (128 < plen)
1012 return -1;
1013
1014 memset(&addr, 0, sizeof(addr));
1015 TCHECK2(pptr[12], (plen + 7) / 8);
1016 memcpy(&addr, &pptr[12], (plen + 7) / 8);
1017 if (plen % 8) {
1018 addr.s6_addr[(plen + 7) / 8 - 1] &=
1019 ((0xff00 >> (plen % 8)) & 0xff);
1020 }
1021 /* the label may get offsetted by 4 bits so lets shift it right */
1022 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
1023 bgp_vpn_rd_print(pptr+4),
1024 getname6((u_char *)&addr),
1025 plen,
1026 EXTRACT_24BITS(pptr+1)>>4,
1027 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
1028
1029 return 12 + (plen + 7) / 8;
1030
1031 trunc:
1032 return -2;
1033 }
1034 #endif
1035
1036 static int
1037 decode_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
1038 {
1039 u_int8_t addr[19];
1040 u_int plen;
1041
1042 TCHECK(pptr[0]);
1043 plen = pptr[0]; /* get prefix length */
1044
1045 if (152 < plen)
1046 return -1;
1047
1048 memset(&addr, 0, sizeof(addr));
1049 TCHECK2(pptr[4], (plen + 7) / 8);
1050 memcpy(&addr, &pptr[4], (plen + 7) / 8);
1051 if (plen % 8) {
1052 addr[(plen + 7) / 8 - 1] &=
1053 ((0xff00 >> (plen % 8)) & 0xff);
1054 }
1055 snprintf(buf, buflen, "%s/%d",
1056 isonsap_string(addr,(plen + 7) / 8),
1057 plen);
1058
1059 return 1 + (plen + 7) / 8;
1060
1061 trunc:
1062 return -2;
1063 }
1064
1065 static int
1066 decode_labeled_vpn_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
1067 {
1068 u_int8_t addr[19];
1069 u_int plen;
1070
1071 TCHECK(pptr[0]);
1072 plen = pptr[0]; /* get prefix length */
1073
1074 if ((24+64) > plen)
1075 return -1;
1076
1077 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
1078
1079 if (152 < plen)
1080 return -1;
1081
1082 memset(&addr, 0, sizeof(addr));
1083 TCHECK2(pptr[12], (plen + 7) / 8);
1084 memcpy(&addr, &pptr[12], (plen + 7) / 8);
1085 if (plen % 8) {
1086 addr[(plen + 7) / 8 - 1] &=
1087 ((0xff00 >> (plen % 8)) & 0xff);
1088 }
1089 /* the label may get offsetted by 4 bits so lets shift it right */
1090 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
1091 bgp_vpn_rd_print(pptr+4),
1092 isonsap_string(addr,(plen + 7) / 8),
1093 plen,
1094 EXTRACT_24BITS(pptr+1)>>4,
1095 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
1096
1097 return 12 + (plen + 7) / 8;
1098
1099 trunc:
1100 return -2;
1101 }
1102
1103 /*
1104 * bgp_attr_get_as_size
1105 *
1106 * Try to find the size of the ASs encoded in an as-path. It is not obvious, as
1107 * both Old speakers that do not support 4 byte AS, and the new speakers that do
1108 * support, exchange AS-Path with the same path-attribute type value 0x02.
1109 */
1110 static int
1111 bgp_attr_get_as_size (u_int8_t bgpa_type, const u_char *pptr, int len)
1112 {
1113 const u_char *tptr = pptr;
1114
1115 /*
1116 * If the path attribute is the optional AS4 path type, then we already
1117 * know, that ASs must be encoded in 4 byte format.
1118 */
1119 if (bgpa_type == BGPTYPE_AS4_PATH) {
1120 return 4;
1121 }
1122
1123 /*
1124 * Let us assume that ASs are of 2 bytes in size, and check if the AS-Path
1125 * TLV is good. If not, ask the caller to try with AS encoded as 4 bytes
1126 * each.
1127 */
1128 while (tptr < pptr + len) {
1129 TCHECK(tptr[0]);
1130
1131 /*
1132 * If we do not find a valid segment type, our guess might be wrong.
1133 */
1134 if (tptr[0] < BGP_AS_SEG_TYPE_MIN || tptr[0] > BGP_AS_SEG_TYPE_MAX) {
1135 goto trunc;
1136 }
1137 TCHECK(tptr[1]);
1138 tptr += 2 + tptr[1] * 2;
1139 }
1140
1141 /*
1142 * If we correctly reached end of the AS path attribute data content,
1143 * then most likely ASs were indeed encoded as 2 bytes.
1144 */
1145 if (tptr == pptr + len) {
1146 return 2;
1147 }
1148
1149 trunc:
1150
1151 /*
1152 * We can come here, either we did not have enough data, or if we
1153 * try to decode 4 byte ASs in 2 byte format. Either way, return 4,
1154 * so that calller can try to decode each AS as of 4 bytes. If indeed
1155 * there was not enough data, it will crib and end the parse anyways.
1156 */
1157 return 4;
1158 }
1159
1160 static int
1161 bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len)
1162 {
1163 int i;
1164 u_int16_t af;
1165 u_int8_t safi, snpa, nhlen;
1166 union { /* copy buffer for bandwidth values */
1167 float f;
1168 u_int32_t i;
1169 } bw;
1170 int advance;
1171 int tlen;
1172 const u_char *tptr;
1173 char buf[MAXHOSTNAMELEN + 100];
1174 char tokbuf[TOKBUFSIZE];
1175 int as_size;
1176
1177 tptr = pptr;
1178 tlen=len;
1179
1180 switch (attr->bgpa_type) {
1181 case BGPTYPE_ORIGIN:
1182 if (len != 1)
1183 printf("invalid len");
1184 else {
1185 TCHECK(*tptr);
1186 printf("%s", tok2strbuf(bgp_origin_values,
1187 "Unknown Origin Typecode",
1188 tptr[0],
1189 tokbuf, sizeof(tokbuf)));
1190 }
1191 break;
1192
1193
1194 /*
1195 * Process AS4 byte path and AS2 byte path attributes here.
1196 */
1197 case BGPTYPE_AS4_PATH:
1198 case BGPTYPE_AS_PATH:
1199 if (len % 2) {
1200 printf("invalid len");
1201 break;
1202 }
1203 if (!len) {
1204 printf("empty");
1205 break;
1206 }
1207
1208 /*
1209 * BGP updates exchanged between New speakers that support 4
1210 * byte AS, ASs are always encoded in 4 bytes. There is no
1211 * definitive way to find this, just by the packet's
1212 * contents. So, check for packet's TLV's sanity assuming
1213 * 2 bytes first, and it does not pass, assume that ASs are
1214 * encoded in 4 bytes format and move on.
1215 */
1216 as_size = bgp_attr_get_as_size(attr->bgpa_type, pptr, len);
1217
1218 while (tptr < pptr + len) {
1219 TCHECK(tptr[0]);
1220 printf("%s", tok2strbuf(bgp_as_path_segment_open_values,
1221 "?", tptr[0],
1222 tokbuf, sizeof(tokbuf)));
1223 for (i = 0; i < tptr[1] * as_size; i += as_size) {
1224 TCHECK2(tptr[2 + i], as_size);
1225 printf("%u ",
1226 as_size == 2 ? EXTRACT_16BITS(&tptr[2 + i]) :
1227 EXTRACT_32BITS(&tptr[2 + i]));
1228 }
1229 TCHECK(tptr[0]);
1230 printf("%s", tok2strbuf(bgp_as_path_segment_close_values,
1231 "?", tptr[0],
1232 tokbuf, sizeof(tokbuf)));
1233 TCHECK(tptr[1]);
1234 tptr += 2 + tptr[1] * as_size;
1235 }
1236 break;
1237 case BGPTYPE_NEXT_HOP:
1238 if (len != 4)
1239 printf("invalid len");
1240 else {
1241 TCHECK2(tptr[0], 4);
1242 printf("%s", getname(tptr));
1243 }
1244 break;
1245 case BGPTYPE_MULTI_EXIT_DISC:
1246 case BGPTYPE_LOCAL_PREF:
1247 if (len != 4)
1248 printf("invalid len");
1249 else {
1250 TCHECK2(tptr[0], 4);
1251 printf("%u", EXTRACT_32BITS(tptr));
1252 }
1253 break;
1254 case BGPTYPE_ATOMIC_AGGREGATE:
1255 if (len != 0)
1256 printf("invalid len");
1257 break;
1258 case BGPTYPE_AGGREGATOR:
1259 if (len != 6) {
1260 printf("invalid len");
1261 break;
1262 }
1263 TCHECK2(tptr[0], 6);
1264 printf(" AS #%u, origin %s", EXTRACT_16BITS(tptr),
1265 getname(tptr + 2));
1266 break;
1267 case BGPTYPE_AGGREGATOR4:
1268 if (len != 8) {
1269 printf("invalid len");
1270 break;
1271 }
1272 TCHECK2(tptr[0], 8);
1273 printf(" AS #%u, origin %s", EXTRACT_32BITS(tptr),
1274 getname(tptr + 4));
1275 break;
1276 case BGPTYPE_COMMUNITIES:
1277 if (len % 4) {
1278 printf("invalid len");
1279 break;
1280 }
1281 while (tlen>0) {
1282 u_int32_t comm;
1283 TCHECK2(tptr[0], 4);
1284 comm = EXTRACT_32BITS(tptr);
1285 switch (comm) {
1286 case BGP_COMMUNITY_NO_EXPORT:
1287 printf(" NO_EXPORT");
1288 break;
1289 case BGP_COMMUNITY_NO_ADVERT:
1290 printf(" NO_ADVERTISE");
1291 break;
1292 case BGP_COMMUNITY_NO_EXPORT_SUBCONFED:
1293 printf(" NO_EXPORT_SUBCONFED");
1294 break;
1295 default:
1296 printf("%u:%u%s",
1297 (comm >> 16) & 0xffff,
1298 comm & 0xffff,
1299 (tlen>4) ? ", " : "");
1300 break;
1301 }
1302 tlen -=4;
1303 tptr +=4;
1304 }
1305 break;
1306 case BGPTYPE_ORIGINATOR_ID:
1307 if (len != 4) {
1308 printf("invalid len");
1309 break;
1310 }
1311 TCHECK2(tptr[0], 4);
1312 printf("%s",getname(tptr));
1313 break;
1314 case BGPTYPE_CLUSTER_LIST:
1315 if (len % 4) {
1316 printf("invalid len");
1317 break;
1318 }
1319 while (tlen>0) {
1320 TCHECK2(tptr[0], 4);
1321 printf("%s%s",
1322 getname(tptr),
1323 (tlen>4) ? ", " : "");
1324 tlen -=4;
1325 tptr +=4;
1326 }
1327 break;
1328 case BGPTYPE_MP_REACH_NLRI:
1329 TCHECK2(tptr[0], 3);
1330 af = EXTRACT_16BITS(tptr);
1331 safi = tptr[2];
1332
1333 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1334 tok2strbuf(af_values, "Unknown AFI", af,
1335 tokbuf, sizeof(tokbuf)),
1336 af,
1337 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1338 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1339 tokbuf, sizeof(tokbuf)),
1340 safi);
1341
1342 switch(af<<8 | safi) {
1343 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1344 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1345 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1346 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1347 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1348 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1349 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1350 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1351 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN):
1352 #ifdef INET6
1353 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1354 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1355 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1356 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1357 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1358 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1359 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1360 #endif
1361 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1362 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1363 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1364 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1365 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1366 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1367 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1368 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1369 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1370 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1371 break;
1372 default:
1373 TCHECK2(tptr[0], tlen);
1374 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1375 if (vflag <= 1)
1376 print_unknown_data(tptr,"\n\t ",tlen);
1377 goto done;
1378 break;
1379 }
1380
1381 tptr +=3;
1382
1383 TCHECK(tptr[0]);
1384 nhlen = tptr[0];
1385 tlen = nhlen;
1386 tptr++;
1387
1388 if (tlen) {
1389 printf("\n\t nexthop: ");
1390 while (tlen > 0) {
1391 switch(af<<8 | safi) {
1392 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1393 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1394 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1395 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1396 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1397 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN):
1398 if (tlen < (int)sizeof(struct in_addr)) {
1399 printf("invalid len");
1400 tlen = 0;
1401 } else {
1402 TCHECK2(tptr[0], sizeof(struct in_addr));
1403 printf("%s",getname(tptr));
1404 tlen -= sizeof(struct in_addr);
1405 tptr += sizeof(struct in_addr);
1406 }
1407 break;
1408 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1409 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1410 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1411 if (tlen < (int)(sizeof(struct in_addr)+BGP_VPN_RD_LEN)) {
1412 printf("invalid len");
1413 tlen = 0;
1414 } else {
1415 TCHECK2(tptr[0], sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1416 printf("RD: %s, %s",
1417 bgp_vpn_rd_print(tptr),
1418 getname(tptr+BGP_VPN_RD_LEN));
1419 tlen -= (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1420 tptr += (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1421 }
1422 break;
1423 #ifdef INET6
1424 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1425 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1426 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1427 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1428 if (tlen < (int)sizeof(struct in6_addr)) {
1429 printf("invalid len");
1430 tlen = 0;
1431 } else {
1432 TCHECK2(tptr[0], sizeof(struct in6_addr));
1433 printf("%s", getname6(tptr));
1434 tlen -= sizeof(struct in6_addr);
1435 tptr += sizeof(struct in6_addr);
1436 }
1437 break;
1438 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1439 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1440 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1441 if (tlen < (int)(sizeof(struct in6_addr)+BGP_VPN_RD_LEN)) {
1442 printf("invalid len");
1443 tlen = 0;
1444 } else {
1445 TCHECK2(tptr[0], sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1446 printf("RD: %s, %s",
1447 bgp_vpn_rd_print(tptr),
1448 getname6(tptr+BGP_VPN_RD_LEN));
1449 tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1450 tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1451 }
1452 break;
1453 #endif
1454 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1455 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1456 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1457 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1458 if (tlen < (int)sizeof(struct in_addr)) {
1459 printf("invalid len");
1460 tlen = 0;
1461 } else {
1462 TCHECK2(tptr[0], sizeof(struct in_addr));
1463 printf("%s", getname(tptr));
1464 tlen -= (sizeof(struct in_addr));
1465 tptr += (sizeof(struct in_addr));
1466 }
1467 break;
1468 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1469 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1470 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1471 TCHECK2(tptr[0], tlen);
1472 printf("%s",isonsap_string(tptr,tlen));
1473 tptr += tlen;
1474 tlen = 0;
1475 break;
1476
1477 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1478 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1479 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1480 if (tlen < BGP_VPN_RD_LEN+1) {
1481 printf("invalid len");
1482 tlen = 0;
1483 } else {
1484 TCHECK2(tptr[0], tlen);
1485 printf("RD: %s, %s",
1486 bgp_vpn_rd_print(tptr),
1487 isonsap_string(tptr+BGP_VPN_RD_LEN,tlen-BGP_VPN_RD_LEN));
1488 /* rfc986 mapped IPv4 address ? */
1489 if (EXTRACT_32BITS(tptr+BGP_VPN_RD_LEN) == 0x47000601)
1490 printf(" = %s", getname(tptr+BGP_VPN_RD_LEN+4));
1491 #ifdef INET6
1492 /* rfc1888 mapped IPv6 address ? */
1493 else if (EXTRACT_24BITS(tptr+BGP_VPN_RD_LEN) == 0x350000)
1494 printf(" = %s", getname6(tptr+BGP_VPN_RD_LEN+3));
1495 #endif
1496 tptr += tlen;
1497 tlen = 0;
1498 }
1499 break;
1500 default:
1501 TCHECK2(tptr[0], tlen);
1502 printf("no AFI %u/SAFI %u decoder",af,safi);
1503 if (vflag <= 1)
1504 print_unknown_data(tptr,"\n\t ",tlen);
1505 tptr += tlen;
1506 tlen = 0;
1507 goto done;
1508 break;
1509 }
1510 }
1511 }
1512 printf(", nh-length: %u", nhlen);
1513 tptr += tlen;
1514
1515 TCHECK(tptr[0]);
1516 snpa = tptr[0];
1517 tptr++;
1518
1519 if (snpa) {
1520 printf("\n\t %u SNPA", snpa);
1521 for (/*nothing*/; snpa > 0; snpa--) {
1522 TCHECK(tptr[0]);
1523 printf("\n\t %d bytes", tptr[0]);
1524 tptr += tptr[0] + 1;
1525 }
1526 } else {
1527 printf(", no SNPA");
1528 }
1529
1530 while (len - (tptr - pptr) > 0) {
1531 switch (af<<8 | safi) {
1532 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1533 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1534 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1535 advance = decode_prefix4(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 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1544 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1545 if (advance == -1)
1546 printf("\n\t (illegal prefix length)");
1547 else if (advance == -2)
1548 goto trunc;
1549 else
1550 printf("\n\t %s", buf);
1551 break;
1552 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1553 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1554 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1555 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1556 if (advance == -1)
1557 printf("\n\t (illegal prefix length)");
1558 else if (advance == -2)
1559 goto trunc;
1560 else
1561 printf("\n\t %s", buf);
1562 break;
1563 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1564 advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1565 if (advance == -1)
1566 printf("\n\t (illegal prefix length)");
1567 else if (advance == -2)
1568 goto trunc;
1569 else
1570 printf("\n\t %s", buf);
1571 break;
1572 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */
1573 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN):
1574 advance = decode_multicast_vpn(tptr, buf, sizeof(buf));
1575 if (advance == -1)
1576 printf("\n\t (illegal prefix length)");
1577 else if (advance == -2)
1578 goto trunc;
1579 else
1580 printf("\n\t %s", buf);
1581 break;
1582 #ifdef INET6
1583 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1584 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1585 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1586 advance = decode_prefix6(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 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1595 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1596 if (advance == -1)
1597 printf("\n\t (illegal prefix length)");
1598 else if (advance == -2)
1599 goto trunc;
1600 else
1601 printf("\n\t %s", buf);
1602 break;
1603 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1604 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1605 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1606 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1607 if (advance == -1)
1608 printf("\n\t (illegal prefix length)");
1609 else if (advance == -2)
1610 goto trunc;
1611 else
1612 printf("\n\t %s", buf);
1613 break;
1614 #endif
1615 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1616 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1617 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1618 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1619 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1620 if (advance == -1)
1621 printf("\n\t (illegal length)");
1622 else if (advance == -2)
1623 goto trunc;
1624 else
1625 printf("\n\t %s", buf);
1626 break;
1627 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1628 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1629 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1630 advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1631 if (advance == -1)
1632 printf("\n\t (illegal prefix length)");
1633 else if (advance == -2)
1634 goto trunc;
1635 else
1636 printf("\n\t %s", buf);
1637 break;
1638 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1639 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1640 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1641 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1642 if (advance == -1)
1643 printf("\n\t (illegal prefix length)");
1644 else if (advance == -2)
1645 goto trunc;
1646 else
1647 printf("\n\t %s", buf);
1648 break;
1649 default:
1650 TCHECK2(*tptr,tlen);
1651 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1652 if (vflag <= 1)
1653 print_unknown_data(tptr,"\n\t ",tlen);
1654 advance = 0;
1655 tptr = pptr + len;
1656 break;
1657 }
1658 if (advance < 0)
1659 break;
1660 tptr += advance;
1661 }
1662 done:
1663 break;
1664
1665 case BGPTYPE_MP_UNREACH_NLRI:
1666 TCHECK2(tptr[0], BGP_MP_NLRI_MINSIZE);
1667 af = EXTRACT_16BITS(tptr);
1668 safi = tptr[2];
1669
1670 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1671 tok2strbuf(af_values, "Unknown AFI", af,
1672 tokbuf, sizeof(tokbuf)),
1673 af,
1674 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1675 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1676 tokbuf, sizeof(tokbuf)),
1677 safi);
1678
1679 if (len == BGP_MP_NLRI_MINSIZE)
1680 printf("\n\t End-of-Rib Marker (empty NLRI)");
1681
1682 tptr += 3;
1683
1684 while (len - (tptr - pptr) > 0) {
1685 switch (af<<8 | safi) {
1686 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1687 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1688 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1689 advance = decode_prefix4(tptr, buf, sizeof(buf));
1690 if (advance == -1)
1691 printf("\n\t (illegal prefix length)");
1692 else if (advance == -2)
1693 goto trunc;
1694 else
1695 printf("\n\t %s", buf);
1696 break;
1697 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1698 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1699 if (advance == -1)
1700 printf("\n\t (illegal prefix length)");
1701 else if (advance == -2)
1702 goto trunc;
1703 else
1704 printf("\n\t %s", buf);
1705 break;
1706 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1707 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1708 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1709 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1710 if (advance == -1)
1711 printf("\n\t (illegal prefix length)");
1712 else if (advance == -2)
1713 goto trunc;
1714 else
1715 printf("\n\t %s", buf);
1716 break;
1717 #ifdef INET6
1718 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1719 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1720 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1721 advance = decode_prefix6(tptr, buf, sizeof(buf));
1722 if (advance == -1)
1723 printf("\n\t (illegal prefix length)");
1724 else if (advance == -2)
1725 goto trunc;
1726 else
1727 printf("\n\t %s", buf);
1728 break;
1729 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1730 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1731 if (advance == -1)
1732 printf("\n\t (illegal prefix length)");
1733 else if (advance == -2)
1734 goto trunc;
1735 else
1736 printf("\n\t %s", buf);
1737 break;
1738 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1739 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1740 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1741 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1742 if (advance == -1)
1743 printf("\n\t (illegal prefix length)");
1744 else if (advance == -2)
1745 goto trunc;
1746 else
1747 printf("\n\t %s", buf);
1748 break;
1749 #endif
1750 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1751 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1752 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1753 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1754 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1755 if (advance == -1)
1756 printf("\n\t (illegal length)");
1757 else if (advance == -2)
1758 goto trunc;
1759 else
1760 printf("\n\t %s", buf);
1761 break;
1762 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1763 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1764 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1765 advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1766 if (advance == -1)
1767 printf("\n\t (illegal prefix length)");
1768 else if (advance == -2)
1769 goto trunc;
1770 else
1771 printf("\n\t %s", buf);
1772 break;
1773 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1774 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1775 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1776 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1777 if (advance == -1)
1778 printf("\n\t (illegal prefix length)");
1779 else if (advance == -2)
1780 goto trunc;
1781 else
1782 printf("\n\t %s", buf);
1783 break;
1784 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */
1785 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN):
1786 advance = decode_multicast_vpn(tptr, buf, sizeof(buf));
1787 if (advance == -1)
1788 printf("\n\t (illegal prefix length)");
1789 else if (advance == -2)
1790 goto trunc;
1791 else
1792 printf("\n\t %s", buf);
1793 break;
1794 default:
1795 TCHECK2(*(tptr-3),tlen);
1796 printf("no AFI %u / SAFI %u decoder",af,safi);
1797 if (vflag <= 1)
1798 print_unknown_data(tptr-3,"\n\t ",tlen);
1799 advance = 0;
1800 tptr = pptr + len;
1801 break;
1802 }
1803 if (advance < 0)
1804 break;
1805 tptr += advance;
1806 }
1807 break;
1808 case BGPTYPE_EXTD_COMMUNITIES:
1809 if (len % 8) {
1810 printf("invalid len");
1811 break;
1812 }
1813 while (tlen>0) {
1814 u_int16_t extd_comm;
1815
1816 TCHECK2(tptr[0], 2);
1817 extd_comm=EXTRACT_16BITS(tptr);
1818
1819 printf("\n\t %s (0x%04x), Flags [%s]",
1820 tok2strbuf(bgp_extd_comm_subtype_values,
1821 "unknown extd community typecode",
1822 extd_comm, tokbuf, sizeof(tokbuf)),
1823 extd_comm,
1824 bittok2str(bgp_extd_comm_flag_values, "none", extd_comm));
1825
1826 TCHECK2(*(tptr+2), 6);
1827 switch(extd_comm) {
1828 case BGP_EXT_COM_RT_0:
1829 case BGP_EXT_COM_RO_0:
1830 printf(": %u:%u (= %s)",
1831 EXTRACT_16BITS(tptr+2),
1832 EXTRACT_32BITS(tptr+4),
1833 getname(tptr+4));
1834 break;
1835 case BGP_EXT_COM_RT_1:
1836 case BGP_EXT_COM_RO_1:
1837 case BGP_EXT_COM_VRF_RT_IMP:
1838 printf(": %s:%u",
1839 getname(tptr+2),
1840 EXTRACT_16BITS(tptr+6));
1841 break;
1842 case BGP_EXT_COM_RT_2:
1843 case BGP_EXT_COM_RO_2:
1844 printf(": %u:%u",
1845 EXTRACT_32BITS(tptr+2),
1846 EXTRACT_16BITS(tptr+6));
1847 break;
1848 case BGP_EXT_COM_LINKBAND:
1849 bw.i = EXTRACT_32BITS(tptr+2);
1850 printf(": bandwidth: %.3f Mbps",
1851 bw.f*8/1000000);
1852 break;
1853 case BGP_EXT_COM_VPN_ORIGIN:
1854 case BGP_EXT_COM_VPN_ORIGIN2:
1855 case BGP_EXT_COM_VPN_ORIGIN3:
1856 case BGP_EXT_COM_VPN_ORIGIN4:
1857 case BGP_EXT_COM_OSPF_RID:
1858 case BGP_EXT_COM_OSPF_RID2:
1859 printf("%s", getname(tptr+2));
1860 break;
1861 case BGP_EXT_COM_OSPF_RTYPE:
1862 case BGP_EXT_COM_OSPF_RTYPE2:
1863 printf(": area:%s, router-type:%s, metric-type:%s%s",
1864 getname(tptr+2),
1865 tok2strbuf(bgp_extd_comm_ospf_rtype_values,
1866 "unknown (0x%02x)",
1867 *(tptr+6),
1868 tokbuf, sizeof(tokbuf)),
1869 (*(tptr+7) & BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "",
1870 ((*(tptr+6) == BGP_OSPF_RTYPE_EXT) || (*(tptr+6) == BGP_OSPF_RTYPE_NSSA)) ? "E1" : "");
1871 break;
1872 case BGP_EXT_COM_L2INFO:
1873 printf(": %s Control Flags [0x%02x]:MTU %u",
1874 tok2strbuf(l2vpn_encaps_values,
1875 "unknown encaps",
1876 *(tptr+2),
1877 tokbuf, sizeof(tokbuf)),
1878 *(tptr+3),
1879 EXTRACT_16BITS(tptr+4));
1880 break;
1881 case BGP_EXT_COM_SOURCE_AS:
1882 printf(": AS %u", EXTRACT_16BITS(tptr+2));
1883 break;
1884 default:
1885 TCHECK2(*tptr,8);
1886 print_unknown_data(tptr,"\n\t ",8);
1887 break;
1888 }
1889 tlen -=8;
1890 tptr +=8;
1891 }
1892 break;
1893
1894 case BGPTYPE_PMSI_TUNNEL:
1895 {
1896 u_int8_t tunnel_type, flags;
1897
1898 tunnel_type = *(tptr+1);
1899 flags = *tptr;
1900 tlen = len;
1901
1902 TCHECK2(tptr[0], 5);
1903 printf("\n\t Tunnel-type %s (%u), Flags [%s], MPLS Label %u",
1904 tok2str(bgp_pmsi_tunnel_values, "Unknown", tunnel_type),
1905 tunnel_type,
1906 bittok2str(bgp_pmsi_flag_values, "none", flags),
1907 EXTRACT_24BITS(tptr+2)>>4);
1908
1909 tptr +=5;
1910 tlen -= 5;
1911
1912 switch (tunnel_type) {
1913 case BGP_PMSI_TUNNEL_PIM_SM: /* fall through */
1914 case BGP_PMSI_TUNNEL_PIM_BIDIR:
1915 TCHECK2(tptr[0], 8);
1916 printf("\n\t Sender %s, P-Group %s",
1917 ipaddr_string(tptr),
1918 ipaddr_string(tptr+4));
1919 break;
1920
1921 case BGP_PMSI_TUNNEL_PIM_SSM:
1922 TCHECK2(tptr[0], 8);
1923 printf("\n\t Root-Node %s, P-Group %s",
1924 ipaddr_string(tptr),
1925 ipaddr_string(tptr+4));
1926 break;
1927 case BGP_PMSI_TUNNEL_INGRESS:
1928 TCHECK2(tptr[0], 4);
1929 printf("\n\t Tunnel-Endpoint %s",
1930 ipaddr_string(tptr));
1931 break;
1932 case BGP_PMSI_TUNNEL_LDP_P2MP: /* fall through */
1933 case BGP_PMSI_TUNNEL_LDP_MP2MP:
1934 TCHECK2(tptr[0], 8);
1935 printf("\n\t Root-Node %s, LSP-ID 0x%08x",
1936 ipaddr_string(tptr),
1937 EXTRACT_32BITS(tptr+4));
1938 break;
1939 case BGP_PMSI_TUNNEL_RSVP_P2MP:
1940 TCHECK2(tptr[0], 8);
1941 printf("\n\t Extended-Tunnel-ID %s, P2MP-ID 0x%08x",
1942 ipaddr_string(tptr),
1943 EXTRACT_32BITS(tptr+4));
1944 break;
1945 default:
1946 if (vflag <= 1) {
1947 print_unknown_data(tptr,"\n\t ",tlen);
1948 }
1949 }
1950 break;
1951 }
1952 case BGPTYPE_ATTR_SET:
1953 TCHECK2(tptr[0], 4);
1954 printf("\n\t Origin AS: %u", EXTRACT_32BITS(tptr));
1955 tptr+=4;
1956 len -=4;
1957
1958 while (len >= 2 ) {
1959 int alen;
1960 struct bgp_attr bgpa;
1961
1962 TCHECK2(tptr[0], sizeof(bgpa));
1963 memcpy(&bgpa, tptr, sizeof(bgpa));
1964 alen = bgp_attr_len(&bgpa);
1965 tptr += bgp_attr_off(&bgpa);
1966 len -= bgp_attr_off(&bgpa);
1967
1968 printf("\n\t %s (%u), length: %u",
1969 tok2strbuf(bgp_attr_values,
1970 "Unknown Attribute", bgpa.bgpa_type,
1971 tokbuf, sizeof(tokbuf)),
1972 bgpa.bgpa_type,
1973 alen);
1974
1975 if (bgpa.bgpa_flags) {
1976 printf(", Flags [%s%s%s%s",
1977 bgpa.bgpa_flags & 0x80 ? "O" : "",
1978 bgpa.bgpa_flags & 0x40 ? "T" : "",
1979 bgpa.bgpa_flags & 0x20 ? "P" : "",
1980 bgpa.bgpa_flags & 0x10 ? "E" : "");
1981 if (bgpa.bgpa_flags & 0xf)
1982 printf("+%x", bgpa.bgpa_flags & 0xf);
1983 printf("]: ");
1984 }
1985 /* FIXME check for recursion */
1986 if (!bgp_attr_print(&bgpa, tptr, alen))
1987 return 0;
1988 tptr += alen;
1989 len -= alen;
1990 }
1991 break;
1992
1993
1994 default:
1995 TCHECK2(*pptr,len);
1996 printf("\n\t no Attribute %u decoder",attr->bgpa_type); /* we have no decoder for the attribute */
1997 if (vflag <= 1)
1998 print_unknown_data(pptr,"\n\t ",len);
1999 break;
2000 }
2001 if (vflag > 1 && len) { /* omit zero length attributes*/
2002 TCHECK2(*pptr,len);
2003 print_unknown_data(pptr,"\n\t ",len);
2004 }
2005 return 1;
2006
2007 trunc:
2008 return 0;
2009 }
2010
2011 static void
2012 bgp_open_print(const u_char *dat, int length)
2013 {
2014 struct bgp_open bgpo;
2015 struct bgp_opt bgpopt;
2016 const u_char *opt;
2017 int i,cap_type,cap_len,tcap_len,cap_offset;
2018 char tokbuf[TOKBUFSIZE];
2019 char tokbuf2[TOKBUFSIZE];
2020
2021 TCHECK2(dat[0], BGP_OPEN_SIZE);
2022 memcpy(&bgpo, dat, BGP_OPEN_SIZE);
2023
2024 printf("\n\t Version %d, ", bgpo.bgpo_version);
2025 printf("my AS %u, ", ntohs(bgpo.bgpo_myas));
2026 printf("Holdtime %us, ", ntohs(bgpo.bgpo_holdtime));
2027 printf("ID %s", getname((u_char *)&bgpo.bgpo_id));
2028 printf("\n\t Optional parameters, length: %u", bgpo.bgpo_optlen);
2029
2030 /* some little sanity checking */
2031 if (length < bgpo.bgpo_optlen+BGP_OPEN_SIZE)
2032 return;
2033
2034 /* ugly! */
2035 opt = &((const struct bgp_open *)dat)->bgpo_optlen;
2036 opt++;
2037
2038 i = 0;
2039 while (i < bgpo.bgpo_optlen) {
2040 TCHECK2(opt[i], BGP_OPT_SIZE);
2041 memcpy(&bgpopt, &opt[i], BGP_OPT_SIZE);
2042 if (i + 2 + bgpopt.bgpopt_len > bgpo.bgpo_optlen) {
2043 printf("\n\t Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len);
2044 break;
2045 }
2046
2047 printf("\n\t Option %s (%u), length: %u",
2048 tok2strbuf(bgp_opt_values,"Unknown",
2049 bgpopt.bgpopt_type,
2050 tokbuf, sizeof(tokbuf)),
2051 bgpopt.bgpopt_type,
2052 bgpopt.bgpopt_len);
2053
2054 /* now lets decode the options we know*/
2055 switch(bgpopt.bgpopt_type) {
2056 case BGP_OPT_CAP:
2057 cap_type=opt[i+BGP_OPT_SIZE];
2058 cap_len=opt[i+BGP_OPT_SIZE+1];
2059 tcap_len=cap_len;
2060 printf("\n\t %s (%u), length: %u",
2061 tok2strbuf(bgp_capcode_values, "Unknown",
2062 cap_type, tokbuf, sizeof(tokbuf)),
2063 cap_type,
2064 cap_len);
2065 switch(cap_type) {
2066 case BGP_CAPCODE_MP:
2067 printf("\n\t\tAFI %s (%u), SAFI %s (%u)",
2068 tok2strbuf(af_values, "Unknown",
2069 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
2070 tokbuf, sizeof(tokbuf)),
2071 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
2072 tok2strbuf(bgp_safi_values, "Unknown",
2073 opt[i+BGP_OPT_SIZE+5],
2074 tokbuf, sizeof(tokbuf)),
2075 opt[i+BGP_OPT_SIZE+5]);
2076 break;
2077 case BGP_CAPCODE_RESTART:
2078 printf("\n\t\tRestart Flags: [%s], Restart Time %us",
2079 ((opt[i+BGP_OPT_SIZE+2])&0x80) ? "R" : "none",
2080 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2)&0xfff);
2081 tcap_len-=2;
2082 cap_offset=4;
2083 while(tcap_len>=4) {
2084 printf("\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s",
2085 tok2strbuf(af_values,"Unknown",
2086 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
2087 tokbuf, sizeof(tokbuf)),
2088 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
2089 tok2strbuf(bgp_safi_values,"Unknown",
2090 opt[i+BGP_OPT_SIZE+cap_offset+2],
2091 tokbuf2, sizeof(tokbuf2)),
2092 opt[i+BGP_OPT_SIZE+cap_offset+2],
2093 ((opt[i+BGP_OPT_SIZE+cap_offset+3])&0x80) ? "yes" : "no" );
2094 tcap_len-=4;
2095 cap_offset+=4;
2096 }
2097 break;
2098 case BGP_CAPCODE_RR:
2099 case BGP_CAPCODE_RR_CISCO:
2100 break;
2101 default:
2102 TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
2103 printf("\n\t\tno decoder for Capability %u",
2104 cap_type);
2105 if (vflag <= 1)
2106 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
2107 break;
2108 }
2109 if (vflag > 1) {
2110 TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
2111 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
2112 }
2113 break;
2114 case BGP_OPT_AUTH:
2115 default:
2116 printf("\n\t no decoder for option %u",
2117 bgpopt.bgpopt_type);
2118 break;
2119 }
2120
2121 i += BGP_OPT_SIZE + bgpopt.bgpopt_len;
2122 }
2123 return;
2124 trunc:
2125 printf("[|BGP]");
2126 }
2127
2128 static void
2129 bgp_update_print(const u_char *dat, int length)
2130 {
2131 struct bgp bgp;
2132 struct bgp_attr bgpa;
2133 const u_char *p;
2134 int len;
2135 int i;
2136 char tokbuf[TOKBUFSIZE];
2137
2138 TCHECK2(dat[0], BGP_SIZE);
2139 memcpy(&bgp, dat, BGP_SIZE);
2140 p = dat + BGP_SIZE; /*XXX*/
2141
2142 /* Unfeasible routes */
2143 len = EXTRACT_16BITS(p);
2144 if (len) {
2145 /*
2146 * Without keeping state from the original NLRI message,
2147 * it's not possible to tell if this a v4 or v6 route,
2148 * so only try to decode it if we're not v6 enabled.
2149 */
2150 #ifdef INET6
2151 printf("\n\t Withdrawn routes: %d bytes", len);
2152 #else
2153 char buf[MAXHOSTNAMELEN + 100];
2154 int wpfx;
2155
2156 TCHECK2(p[2], len);
2157 i = 2;
2158
2159 printf("\n\t Withdrawn routes:");
2160
2161 while(i < 2 + len) {
2162 wpfx = decode_prefix4(&p[i], buf, sizeof(buf));
2163 if (wpfx == -1) {
2164 printf("\n\t (illegal prefix length)");
2165 break;
2166 } else if (wpfx == -2)
2167 goto trunc;
2168 else {
2169 i += wpfx;
2170 printf("\n\t %s", buf);
2171 }
2172 }
2173 #endif
2174 }
2175 p += 2 + len;
2176
2177 TCHECK2(p[0], 2);
2178 len = EXTRACT_16BITS(p);
2179
2180 if (len == 0 && length == BGP_UPDATE_MINSIZE) {
2181 printf("\n\t End-of-Rib Marker (empty NLRI)");
2182 return;
2183 }
2184
2185 if (len) {
2186 /* do something more useful!*/
2187 i = 2;
2188 while (i < 2 + len) {
2189 int alen, aoff;
2190
2191 TCHECK2(p[i], sizeof(bgpa));
2192 memcpy(&bgpa, &p[i], sizeof(bgpa));
2193 alen = bgp_attr_len(&bgpa);
2194 aoff = bgp_attr_off(&bgpa);
2195
2196 printf("\n\t %s (%u), length: %u",
2197 tok2strbuf(bgp_attr_values, "Unknown Attribute",
2198 bgpa.bgpa_type,
2199 tokbuf, sizeof(tokbuf)),
2200 bgpa.bgpa_type,
2201 alen);
2202
2203 if (bgpa.bgpa_flags) {
2204 printf(", Flags [%s%s%s%s",
2205 bgpa.bgpa_flags & 0x80 ? "O" : "",
2206 bgpa.bgpa_flags & 0x40 ? "T" : "",
2207 bgpa.bgpa_flags & 0x20 ? "P" : "",
2208 bgpa.bgpa_flags & 0x10 ? "E" : "");
2209 if (bgpa.bgpa_flags & 0xf)
2210 printf("+%x", bgpa.bgpa_flags & 0xf);
2211 printf("]: ");
2212 }
2213 if (!bgp_attr_print(&bgpa, &p[i + aoff], alen))
2214 goto trunc;
2215 i += aoff + alen;
2216 }
2217 }
2218 p += 2 + len;
2219
2220 if (dat + length > p) {
2221 printf("\n\t Updated routes:");
2222 while (dat + length > p) {
2223 char buf[MAXHOSTNAMELEN + 100];
2224 i = decode_prefix4(p, buf, sizeof(buf));
2225 if (i == -1) {
2226 printf("\n\t (illegal prefix length)");
2227 break;
2228 } else if (i == -2)
2229 goto trunc;
2230 else {
2231 printf("\n\t %s", buf);
2232 p += i;
2233 }
2234 }
2235 }
2236 return;
2237 trunc:
2238 printf("[|BGP]");
2239 }
2240
2241 static void
2242 bgp_notification_print(const u_char *dat, int length)
2243 {
2244 struct bgp_notification bgpn;
2245 const u_char *tptr;
2246 char tokbuf[TOKBUFSIZE];
2247 char tokbuf2[TOKBUFSIZE];
2248
2249 TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
2250 memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
2251
2252 /* some little sanity checking */
2253 if (length<BGP_NOTIFICATION_SIZE)
2254 return;
2255
2256 printf(", %s (%u)",
2257 tok2strbuf(bgp_notify_major_values, "Unknown Error",
2258 bgpn.bgpn_major, tokbuf, sizeof(tokbuf)),
2259 bgpn.bgpn_major);
2260
2261 switch (bgpn.bgpn_major) {
2262
2263 case BGP_NOTIFY_MAJOR_MSG:
2264 printf(", subcode %s (%u)",
2265 tok2strbuf(bgp_notify_minor_msg_values, "Unknown",
2266 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2267 bgpn.bgpn_minor);
2268 break;
2269 case BGP_NOTIFY_MAJOR_OPEN:
2270 printf(", subcode %s (%u)",
2271 tok2strbuf(bgp_notify_minor_open_values, "Unknown",
2272 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2273 bgpn.bgpn_minor);
2274 break;
2275 case BGP_NOTIFY_MAJOR_UPDATE:
2276 printf(", subcode %s (%u)",
2277 tok2strbuf(bgp_notify_minor_update_values, "Unknown",
2278 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2279 bgpn.bgpn_minor);
2280 break;
2281 case BGP_NOTIFY_MAJOR_CAP:
2282 printf(" subcode %s (%u)",
2283 tok2strbuf(bgp_notify_minor_cap_values, "Unknown",
2284 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2285 bgpn.bgpn_minor);
2286 case BGP_NOTIFY_MAJOR_CEASE:
2287 printf(", subcode %s (%u)",
2288 tok2strbuf(bgp_notify_minor_cease_values, "Unknown",
2289 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2290 bgpn.bgpn_minor);
2291
2292 /* draft-ietf-idr-cease-subcode-02 mentions optionally 7 bytes
2293 * for the maxprefix subtype, which may contain AFI, SAFI and MAXPREFIXES
2294 */
2295 if(bgpn.bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= BGP_NOTIFICATION_SIZE + 7) {
2296 tptr = dat + BGP_NOTIFICATION_SIZE;
2297 TCHECK2(*tptr, 7);
2298 printf(", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
2299 tok2strbuf(af_values, "Unknown",
2300 EXTRACT_16BITS(tptr), tokbuf, sizeof(tokbuf)),
2301 EXTRACT_16BITS(tptr),
2302 tok2strbuf(bgp_safi_values, "Unknown", *(tptr+2),
2303 tokbuf2, sizeof(tokbuf)),
2304 *(tptr+2),
2305 EXTRACT_32BITS(tptr+3));
2306 }
2307 break;
2308 default:
2309 break;
2310 }
2311
2312 return;
2313 trunc:
2314 printf("[|BGP]");
2315 }
2316
2317 static void
2318 bgp_route_refresh_print(const u_char *pptr, int len) {
2319
2320 const struct bgp_route_refresh *bgp_route_refresh_header;
2321 char tokbuf[TOKBUFSIZE];
2322 char tokbuf2[TOKBUFSIZE];
2323
2324 TCHECK2(pptr[0], BGP_ROUTE_REFRESH_SIZE);
2325
2326 /* some little sanity checking */
2327 if (len<BGP_ROUTE_REFRESH_SIZE)
2328 return;
2329
2330 bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
2331
2332 printf("\n\t AFI %s (%u), SAFI %s (%u)",
2333 tok2strbuf(af_values,"Unknown",
2334 /* this stinks but the compiler pads the structure
2335 * weird */
2336 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
2337 tokbuf, sizeof(tokbuf)),
2338 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
2339 tok2strbuf(bgp_safi_values,"Unknown",
2340 bgp_route_refresh_header->safi,
2341 tokbuf2, sizeof(tokbuf2)),
2342 bgp_route_refresh_header->safi);
2343
2344 if (vflag > 1) {
2345 TCHECK2(*pptr, len);
2346 print_unknown_data(pptr,"\n\t ", len);
2347 }
2348
2349 return;
2350 trunc:
2351 printf("[|BGP]");
2352 }
2353
2354 static int
2355 bgp_header_print(const u_char *dat, int length)
2356 {
2357 struct bgp bgp;
2358 char tokbuf[TOKBUFSIZE];
2359
2360 TCHECK2(dat[0], BGP_SIZE);
2361 memcpy(&bgp, dat, BGP_SIZE);
2362 printf("\n\t%s Message (%u), length: %u",
2363 tok2strbuf(bgp_msg_values, "Unknown", bgp.bgp_type,
2364 tokbuf, sizeof(tokbuf)),
2365 bgp.bgp_type,
2366 length);
2367
2368 switch (bgp.bgp_type) {
2369 case BGP_OPEN:
2370 bgp_open_print(dat, length);
2371 break;
2372 case BGP_UPDATE:
2373 bgp_update_print(dat, length);
2374 break;
2375 case BGP_NOTIFICATION:
2376 bgp_notification_print(dat, length);
2377 break;
2378 case BGP_KEEPALIVE:
2379 break;
2380 case BGP_ROUTE_REFRESH:
2381 bgp_route_refresh_print(dat, length);
2382 break;
2383 default:
2384 /* we have no decoder for the BGP message */
2385 TCHECK2(*dat, length);
2386 printf("\n\t no Message %u decoder",bgp.bgp_type);
2387 print_unknown_data(dat,"\n\t ",length);
2388 break;
2389 }
2390 return 1;
2391 trunc:
2392 printf("[|BGP]");
2393 return 0;
2394 }
2395
2396 void
2397 bgp_print(const u_char *dat, int length)
2398 {
2399 const u_char *p;
2400 const u_char *ep;
2401 const u_char *start;
2402 const u_char marker[] = {
2403 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
2404 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
2405 };
2406 struct bgp bgp;
2407 u_int16_t hlen;
2408 char tokbuf[TOKBUFSIZE];
2409
2410 ep = dat + length;
2411 if (snapend < dat + length)
2412 ep = snapend;
2413
2414 printf(": BGP, length: %u",length);
2415
2416 if (vflag < 1) /* lets be less chatty */
2417 return;
2418
2419 p = dat;
2420 start = p;
2421 while (p < ep) {
2422 if (!TTEST2(p[0], 1))
2423 break;
2424 if (p[0] != 0xff) {
2425 p++;
2426 continue;
2427 }
2428
2429 if (!TTEST2(p[0], sizeof(marker)))
2430 break;
2431 if (memcmp(p, marker, sizeof(marker)) != 0) {
2432 p++;
2433 continue;
2434 }
2435
2436 /* found BGP header */
2437 TCHECK2(p[0], BGP_SIZE); /*XXX*/
2438 memcpy(&bgp, p, BGP_SIZE);
2439
2440 if (start != p)
2441 printf(" [|BGP]");
2442
2443 hlen = ntohs(bgp.bgp_len);
2444 if (hlen < BGP_SIZE) {
2445 printf("\n[|BGP Bogus header length %u < %u]", hlen,
2446 BGP_SIZE);
2447 break;
2448 }
2449
2450 if (TTEST2(p[0], hlen)) {
2451 if (!bgp_header_print(p, hlen))
2452 return;
2453 p += hlen;
2454 start = p;
2455 } else {
2456 printf("\n[|BGP %s]",
2457 tok2strbuf(bgp_msg_values,
2458 "Unknown Message Type",
2459 bgp.bgp_type,
2460 tokbuf, sizeof(tokbuf)));
2461 break;
2462 }
2463 }
2464
2465 return;
2466
2467 trunc:
2468 printf(" [|BGP]");
2469 }
2470
2471 /*
2472 * Local Variables:
2473 * c-style: whitesmith
2474 * c-basic-offset: 4
2475 * End:
2476 */
DragonFly BSD