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usbmodeswitch: Updated to v.1.2.6 from shibby's branch.
[tomato.git] / release / src / router / tcpdump / print-bgp.c
blobc1e382fd76bea0589cfac176e6e35b779dc73114
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 1.118 2007-12-07 15:54:52 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 #define BGP_CAP_HEADER_SIZE 2 /* some compilers may pad to 4 bytes */
97
98 struct bgp_notification {
99 u_int8_t bgpn_marker[16];
100 u_int16_t bgpn_len;
101 u_int8_t bgpn_type;
102 u_int8_t bgpn_major;
103 u_int8_t bgpn_minor;
104 };
105 #define BGP_NOTIFICATION_SIZE 21 /* unaligned */
106
107 struct bgp_route_refresh {
108 u_int8_t bgp_marker[16];
109 u_int16_t len;
110 u_int8_t type;
111 u_int8_t afi[2]; /* the compiler messes this structure up */
112 u_int8_t res; /* when doing misaligned sequences of int8 and int16 */
113 u_int8_t safi; /* afi should be int16 - so we have to access it using */
114 }; /* EXTRACT_16BITS(&bgp_route_refresh->afi) (sigh) */
115 #define BGP_ROUTE_REFRESH_SIZE 23
116
117 #define bgp_attr_lenlen(flags, p) \
118 (((flags) & 0x10) ? 2 : 1)
119 #define bgp_attr_len(flags, p) \
120 (((flags) & 0x10) ? EXTRACT_16BITS(p) : *(p))
121
122 #define BGPTYPE_ORIGIN 1
123 #define BGPTYPE_AS_PATH 2
124 #define BGPTYPE_NEXT_HOP 3
125 #define BGPTYPE_MULTI_EXIT_DISC 4
126 #define BGPTYPE_LOCAL_PREF 5
127 #define BGPTYPE_ATOMIC_AGGREGATE 6
128 #define BGPTYPE_AGGREGATOR 7
129 #define BGPTYPE_COMMUNITIES 8 /* RFC1997 */
130 #define BGPTYPE_ORIGINATOR_ID 9 /* RFC1998 */
131 #define BGPTYPE_CLUSTER_LIST 10 /* RFC1998 */
132 #define BGPTYPE_DPA 11 /* draft-ietf-idr-bgp-dpa */
133 #define BGPTYPE_ADVERTISERS 12 /* RFC1863 */
134 #define BGPTYPE_RCID_PATH 13 /* RFC1863 */
135 #define BGPTYPE_MP_REACH_NLRI 14 /* RFC2283 */
136 #define BGPTYPE_MP_UNREACH_NLRI 15 /* RFC2283 */
137 #define BGPTYPE_EXTD_COMMUNITIES 16 /* draft-ietf-idr-bgp-ext-communities */
138 #define BGPTYPE_AS4_PATH 17 /* RFC4893 */
139 #define BGPTYPE_AGGREGATOR4 18 /* RFC4893 */
140 #define BGPTYPE_PMSI_TUNNEL 22 /* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */
141 #define BGPTYPE_ATTR_SET 128 /* draft-marques-ppvpn-ibgp */
142
143 #define BGP_MP_NLRI_MINSIZE 3 /* End of RIB Marker detection */
144
145 static struct tok bgp_attr_values[] = {
146 { BGPTYPE_ORIGIN, "Origin"},
147 { BGPTYPE_AS_PATH, "AS Path"},
148 { BGPTYPE_AS4_PATH, "AS4 Path"},
149 { BGPTYPE_NEXT_HOP, "Next Hop"},
150 { BGPTYPE_MULTI_EXIT_DISC, "Multi Exit Discriminator"},
151 { BGPTYPE_LOCAL_PREF, "Local Preference"},
152 { BGPTYPE_ATOMIC_AGGREGATE, "Atomic Aggregate"},
153 { BGPTYPE_AGGREGATOR, "Aggregator"},
154 { BGPTYPE_AGGREGATOR4, "Aggregator4"},
155 { BGPTYPE_COMMUNITIES, "Community"},
156 { BGPTYPE_ORIGINATOR_ID, "Originator ID"},
157 { BGPTYPE_CLUSTER_LIST, "Cluster List"},
158 { BGPTYPE_DPA, "DPA"},
159 { BGPTYPE_ADVERTISERS, "Advertisers"},
160 { BGPTYPE_RCID_PATH, "RCID Path / Cluster ID"},
161 { BGPTYPE_MP_REACH_NLRI, "Multi-Protocol Reach NLRI"},
162 { BGPTYPE_MP_UNREACH_NLRI, "Multi-Protocol Unreach NLRI"},
163 { BGPTYPE_EXTD_COMMUNITIES, "Extended Community"},
164 { BGPTYPE_PMSI_TUNNEL, "PMSI Tunnel"},
165 { BGPTYPE_ATTR_SET, "Attribute Set"},
166 { 255, "Reserved for development"},
167 { 0, NULL}
168 };
169
170 #define BGP_AS_SET 1
171 #define BGP_AS_SEQUENCE 2
172 #define BGP_CONFED_AS_SEQUENCE 3 /* draft-ietf-idr-rfc3065bis-01 */
173 #define BGP_CONFED_AS_SET 4 /* draft-ietf-idr-rfc3065bis-01 */
174
175 #define BGP_AS_SEG_TYPE_MIN BGP_AS_SET
176 #define BGP_AS_SEG_TYPE_MAX BGP_CONFED_AS_SET
177
178 static struct tok bgp_as_path_segment_open_values[] = {
179 { BGP_AS_SEQUENCE, ""},
180 { BGP_AS_SET, "{ "},
181 { BGP_CONFED_AS_SEQUENCE, "( "},
182 { BGP_CONFED_AS_SET, "({ "},
183 { 0, NULL}
184 };
185
186 static struct tok bgp_as_path_segment_close_values[] = {
187 { BGP_AS_SEQUENCE, ""},
188 { BGP_AS_SET, "}"},
189 { BGP_CONFED_AS_SEQUENCE, ")"},
190 { BGP_CONFED_AS_SET, "})"},
191 { 0, NULL}
192 };
193
194 #define BGP_OPT_AUTH 1
195 #define BGP_OPT_CAP 2
196
197
198 static struct tok bgp_opt_values[] = {
199 { BGP_OPT_AUTH, "Authentication Information"},
200 { BGP_OPT_CAP, "Capabilities Advertisement"},
201 { 0, NULL}
202 };
203
204 #define BGP_CAPCODE_MP 1
205 #define BGP_CAPCODE_RR 2
206 #define BGP_CAPCODE_ORF 3 /* XXX */
207 #define BGP_CAPCODE_RESTART 64 /* draft-ietf-idr-restart-05 */
208 #define BGP_CAPCODE_AS_NEW 65 /* XXX */
209 #define BGP_CAPCODE_DYN_CAP 67 /* XXX */
210 #define BGP_CAPCODE_RR_CISCO 128
211
212 static struct tok bgp_capcode_values[] = {
213 { BGP_CAPCODE_MP, "Multiprotocol Extensions"},
214 { BGP_CAPCODE_RR, "Route Refresh"},
215 { BGP_CAPCODE_ORF, "Cooperative Route Filtering"},
216 { BGP_CAPCODE_RESTART, "Graceful Restart"},
217 { BGP_CAPCODE_AS_NEW, "32-Bit AS Number"},
218 { BGP_CAPCODE_DYN_CAP, "Dynamic Capability"},
219 { BGP_CAPCODE_RR_CISCO, "Route Refresh (Cisco)"},
220 { 0, NULL}
221 };
222
223 #define BGP_NOTIFY_MAJOR_MSG 1
224 #define BGP_NOTIFY_MAJOR_OPEN 2
225 #define BGP_NOTIFY_MAJOR_UPDATE 3
226 #define BGP_NOTIFY_MAJOR_HOLDTIME 4
227 #define BGP_NOTIFY_MAJOR_FSM 5
228 #define BGP_NOTIFY_MAJOR_CEASE 6
229 #define BGP_NOTIFY_MAJOR_CAP 7
230
231 static struct tok bgp_notify_major_values[] = {
232 { BGP_NOTIFY_MAJOR_MSG, "Message Header Error"},
233 { BGP_NOTIFY_MAJOR_OPEN, "OPEN Message Error"},
234 { BGP_NOTIFY_MAJOR_UPDATE, "UPDATE Message Error"},
235 { BGP_NOTIFY_MAJOR_HOLDTIME,"Hold Timer Expired"},
236 { BGP_NOTIFY_MAJOR_FSM, "Finite State Machine Error"},
237 { BGP_NOTIFY_MAJOR_CEASE, "Cease"},
238 { BGP_NOTIFY_MAJOR_CAP, "Capability Message Error"},
239 { 0, NULL}
240 };
241
242 /* draft-ietf-idr-cease-subcode-02 */
243 #define BGP_NOTIFY_MINOR_CEASE_MAXPRFX 1
244 static struct tok bgp_notify_minor_cease_values[] = {
245 { BGP_NOTIFY_MINOR_CEASE_MAXPRFX, "Maximum Number of Prefixes Reached"},
246 { 2, "Administratively Shutdown"},
247 { 3, "Peer Unconfigured"},
248 { 4, "Administratively Reset"},
249 { 5, "Connection Rejected"},
250 { 6, "Other Configuration Change"},
251 { 7, "Connection Collision Resolution"},
252 { 0, NULL}
253 };
254
255 static struct tok bgp_notify_minor_msg_values[] = {
256 { 1, "Connection Not Synchronized"},
257 { 2, "Bad Message Length"},
258 { 3, "Bad Message Type"},
259 { 0, NULL}
260 };
261
262 static struct tok bgp_notify_minor_open_values[] = {
263 { 1, "Unsupported Version Number"},
264 { 2, "Bad Peer AS"},
265 { 3, "Bad BGP Identifier"},
266 { 4, "Unsupported Optional Parameter"},
267 { 5, "Authentication Failure"},
268 { 6, "Unacceptable Hold Time"},
269 { 7, "Capability Message Error"},
270 { 0, NULL}
271 };
272
273 static struct tok bgp_notify_minor_update_values[] = {
274 { 1, "Malformed Attribute List"},
275 { 2, "Unrecognized Well-known Attribute"},
276 { 3, "Missing Well-known Attribute"},
277 { 4, "Attribute Flags Error"},
278 { 5, "Attribute Length Error"},
279 { 6, "Invalid ORIGIN Attribute"},
280 { 7, "AS Routing Loop"},
281 { 8, "Invalid NEXT_HOP Attribute"},
282 { 9, "Optional Attribute Error"},
283 { 10, "Invalid Network Field"},
284 { 11, "Malformed AS_PATH"},
285 { 0, NULL}
286 };
287
288 static struct tok bgp_notify_minor_cap_values[] = {
289 { 1, "Invalid Action Value" },
290 { 2, "Invalid Capability Length" },
291 { 3, "Malformed Capability Value" },
292 { 4, "Unsupported Capability Code" },
293 { 0, NULL }
294 };
295
296 static struct tok bgp_origin_values[] = {
297 { 0, "IGP"},
298 { 1, "EGP"},
299 { 2, "Incomplete"},
300 { 0, NULL}
301 };
302
303 #define BGP_PMSI_TUNNEL_RSVP_P2MP 1
304 #define BGP_PMSI_TUNNEL_LDP_P2MP 2
305 #define BGP_PMSI_TUNNEL_PIM_SSM 3
306 #define BGP_PMSI_TUNNEL_PIM_SM 4
307 #define BGP_PMSI_TUNNEL_PIM_BIDIR 5
308 #define BGP_PMSI_TUNNEL_INGRESS 6
309 #define BGP_PMSI_TUNNEL_LDP_MP2MP 7
310
311 static struct tok bgp_pmsi_tunnel_values[] = {
312 { BGP_PMSI_TUNNEL_RSVP_P2MP, "RSVP-TE P2MP LSP"},
313 { BGP_PMSI_TUNNEL_LDP_P2MP, "LDP P2MP LSP"},
314 { BGP_PMSI_TUNNEL_PIM_SSM, "PIM-SSM Tree"},
315 { BGP_PMSI_TUNNEL_PIM_SM, "PIM-SM Tree"},
316 { BGP_PMSI_TUNNEL_PIM_BIDIR, "PIM-Bidir Tree"},
317 { BGP_PMSI_TUNNEL_INGRESS, "Ingress Replication"},
318 { BGP_PMSI_TUNNEL_LDP_MP2MP, "LDP MP2MP LSP"},
319 { 0, NULL}
320 };
321
322 static struct tok bgp_pmsi_flag_values[] = {
323 { 0x01, "Leaf Information required"},
324 { 0, NULL}
325 };
326
327
328 /* Subsequent address family identifier, RFC2283 section 7 */
329 #define SAFNUM_RES 0
330 #define SAFNUM_UNICAST 1
331 #define SAFNUM_MULTICAST 2
332 #define SAFNUM_UNIMULTICAST 3
333 /* labeled BGP RFC3107 */
334 #define SAFNUM_LABUNICAST 4
335 /* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */
336 #define SAFNUM_MULTICAST_VPN 5
337 #define SAFNUM_TUNNEL 64 /* XXX */
338 #define SAFNUM_VPLS 65 /* XXX */
339 /* draft-nalawade-idr-mdt-safi-03 */
340 #define SAFNUM_MDT 66
341 /* Section 4.3.4 of draft-rosen-rfc2547bis-03.txt */
342 #define SAFNUM_VPNUNICAST 128
343 #define SAFNUM_VPNMULTICAST 129
344 #define SAFNUM_VPNUNIMULTICAST 130
345 /* draft-marques-ppvpn-rt-constrain-01.txt */
346 #define SAFNUM_RT_ROUTING_INFO 132
347
348 #define BGP_VPN_RD_LEN 8
349
350 static struct tok bgp_safi_values[] = {
351 { SAFNUM_RES, "Reserved"},
352 { SAFNUM_UNICAST, "Unicast"},
353 { SAFNUM_MULTICAST, "Multicast"},
354 { SAFNUM_UNIMULTICAST, "Unicast+Multicast"},
355 { SAFNUM_LABUNICAST, "labeled Unicast"},
356 { SAFNUM_TUNNEL, "Tunnel"},
357 { SAFNUM_VPLS, "VPLS"},
358 { SAFNUM_MDT, "MDT"},
359 { SAFNUM_VPNUNICAST, "labeled VPN Unicast"},
360 { SAFNUM_VPNMULTICAST, "labeled VPN Multicast"},
361 { SAFNUM_VPNUNIMULTICAST, "labeled VPN Unicast+Multicast"},
362 { SAFNUM_RT_ROUTING_INFO, "Route Target Routing Information"},
363 { SAFNUM_MULTICAST_VPN, "Multicast VPN"},
364 { 0, NULL }
365 };
366
367 /* well-known community */
368 #define BGP_COMMUNITY_NO_EXPORT 0xffffff01
369 #define BGP_COMMUNITY_NO_ADVERT 0xffffff02
370 #define BGP_COMMUNITY_NO_EXPORT_SUBCONFED 0xffffff03
371
372 /* Extended community type - draft-ietf-idr-bgp-ext-communities-05 */
373 #define BGP_EXT_COM_RT_0 0x0002 /* Route Target,Format AS(2bytes):AN(4bytes) */
374 #define BGP_EXT_COM_RT_1 0x0102 /* Route Target,Format IP address:AN(2bytes) */
375 #define BGP_EXT_COM_RT_2 0x0202 /* Route Target,Format AN(4bytes):local(2bytes) */
376 #define BGP_EXT_COM_RO_0 0x0003 /* Route Origin,Format AS(2bytes):AN(4bytes) */
377 #define BGP_EXT_COM_RO_1 0x0103 /* Route Origin,Format IP address:AN(2bytes) */
378 #define BGP_EXT_COM_RO_2 0x0203 /* Route Origin,Format AN(4bytes):local(2bytes) */
379 #define BGP_EXT_COM_LINKBAND 0x4004 /* Link Bandwidth,Format AS(2B):Bandwidth(4B) */
380 /* rfc2547 bgp-mpls-vpns */
381 #define BGP_EXT_COM_VPN_ORIGIN 0x0005 /* OSPF Domain ID / VPN of Origin - draft-rosen-vpns-ospf-bgp-mpls */
382 #define BGP_EXT_COM_VPN_ORIGIN2 0x0105 /* duplicate - keep for backwards compatability */
383 #define BGP_EXT_COM_VPN_ORIGIN3 0x0205 /* duplicate - keep for backwards compatability */
384 #define BGP_EXT_COM_VPN_ORIGIN4 0x8005 /* duplicate - keep for backwards compatability */
385
386 #define BGP_EXT_COM_OSPF_RTYPE 0x0306 /* OSPF Route Type,Format Area(4B):RouteType(1B):Options(1B) */
387 #define BGP_EXT_COM_OSPF_RTYPE2 0x8000 /* duplicate - keep for backwards compatability */
388
389 #define BGP_EXT_COM_OSPF_RID 0x0107 /* OSPF Router ID,Format RouterID(4B):Unused(2B) */
390 #define BGP_EXT_COM_OSPF_RID2 0x8001 /* duplicate - keep for backwards compatability */
391
392 #define BGP_EXT_COM_L2INFO 0x800a /* draft-kompella-ppvpn-l2vpn */
393
394 #define BGP_EXT_COM_SOURCE_AS 0x0009 /* RFC-ietf-l3vpn-2547bis-mcast-bgp-08.txt */
395 #define BGP_EXT_COM_VRF_RT_IMP 0x010b /* RFC-ietf-l3vpn-2547bis-mcast-bgp-08.txt */
396 #define BGP_EXT_COM_L2VPN_RT_0 0x000a /* L2VPN Identifier,Format AS(2bytes):AN(4bytes) */
397 #define BGP_EXT_COM_L2VPN_RT_1 0xF10a /* L2VPN Identifier,Format IP address:AN(2bytes) */
398
399
400 /* http://www.cisco.com/en/US/tech/tk436/tk428/technologies_tech_note09186a00801eb09a.shtml */
401 #define BGP_EXT_COM_EIGRP_GEN 0x8800
402 #define BGP_EXT_COM_EIGRP_METRIC_AS_DELAY 0x8801
403 #define BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW 0x8802
404 #define BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU 0x8803
405 #define BGP_EXT_COM_EIGRP_EXT_REMAS_REMID 0x8804
406 #define BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC 0x8805
407
408 static struct tok bgp_extd_comm_flag_values[] = {
409 { 0x8000, "vendor-specific"},
410 { 0x4000, "non-transitive"},
411 { 0, NULL},
412 };
413
414 static struct tok bgp_extd_comm_subtype_values[] = {
415 { BGP_EXT_COM_RT_0, "target"},
416 { BGP_EXT_COM_RT_1, "target"},
417 { BGP_EXT_COM_RT_2, "target"},
418 { BGP_EXT_COM_RO_0, "origin"},
419 { BGP_EXT_COM_RO_1, "origin"},
420 { BGP_EXT_COM_RO_2, "origin"},
421 { BGP_EXT_COM_LINKBAND, "link-BW"},
422 { BGP_EXT_COM_VPN_ORIGIN, "ospf-domain"},
423 { BGP_EXT_COM_VPN_ORIGIN2, "ospf-domain"},
424 { BGP_EXT_COM_VPN_ORIGIN3, "ospf-domain"},
425 { BGP_EXT_COM_VPN_ORIGIN4, "ospf-domain"},
426 { BGP_EXT_COM_OSPF_RTYPE, "ospf-route-type"},
427 { BGP_EXT_COM_OSPF_RTYPE2, "ospf-route-type"},
428 { BGP_EXT_COM_OSPF_RID, "ospf-router-id"},
429 { BGP_EXT_COM_OSPF_RID2, "ospf-router-id"},
430 { BGP_EXT_COM_L2INFO, "layer2-info"},
431 { BGP_EXT_COM_EIGRP_GEN , "eigrp-general-route (flag, tag)" },
432 { BGP_EXT_COM_EIGRP_METRIC_AS_DELAY , "eigrp-route-metric (AS, delay)" },
433 { BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW , "eigrp-route-metric (reliability, nexthop, bandwidth)" },
434 { BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU , "eigrp-route-metric (load, MTU)" },
435 { BGP_EXT_COM_EIGRP_EXT_REMAS_REMID , "eigrp-external-route (remote-AS, remote-ID)" },
436 { BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC , "eigrp-external-route (remote-proto, remote-metric)" },
437 { BGP_EXT_COM_SOURCE_AS, "source-AS" },
438 { BGP_EXT_COM_VRF_RT_IMP, "vrf-route-import"},
439 { BGP_EXT_COM_L2VPN_RT_0, "l2vpn-id"},
440 { BGP_EXT_COM_L2VPN_RT_1, "l2vpn-id"},
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 #define TOKBUFSIZE 128
464 static char astostr[20];
465
466 /*
467 * as_printf
468 *
469 * Convert an AS number into a string and return string pointer.
470 *
471 * Bepending on bflag is set or not, AS number is converted into ASDOT notation
472 * or plain number notation.
473 *
474 */
475 static char *
476 as_printf (char *str, int size, u_int asnum)
477 {
478 if (!bflag || asnum <= 0xFFFF) {
479 snprintf(str, size, "%u", asnum);
480 } else {
481 snprintf(str, size, "%u.%u", asnum >> 16, asnum & 0xFFFF);
482 }
483 return str;
484 }
485
486 #define ITEMCHECK(minlen) if (itemlen < minlen) goto badtlv;
487
488 int
489 decode_prefix4(const u_char *pptr, u_int itemlen, char *buf, u_int buflen)
490 {
491 struct in_addr addr;
492 u_int plen, plenbytes;
493
494 TCHECK(pptr[0]);
495 ITEMCHECK(1);
496 plen = pptr[0];
497 if (32 < plen)
498 return -1;
499 itemlen -= 1;
500
501 memset(&addr, 0, sizeof(addr));
502 plenbytes = (plen + 7) / 8;
503 TCHECK2(pptr[1], plenbytes);
504 ITEMCHECK(plenbytes);
505 memcpy(&addr, &pptr[1], plenbytes);
506 if (plen % 8) {
507 ((u_char *)&addr)[plenbytes - 1] &=
508 ((0xff00 >> (plen % 8)) & 0xff);
509 }
510 snprintf(buf, buflen, "%s/%d", getname((u_char *)&addr), plen);
511 return 1 + plenbytes;
512
513 trunc:
514 return -2;
515
516 badtlv:
517 return -3;
518 }
519
520 static int
521 decode_labeled_prefix4(const u_char *pptr, u_int itemlen, char *buf, u_int buflen)
522 {
523 struct in_addr addr;
524 u_int plen, plenbytes;
525
526 /* prefix length and label = 4 bytes */
527 TCHECK2(pptr[0], 4);
528 ITEMCHECK(4);
529 plen = pptr[0]; /* get prefix length */
530
531 /* this is one of the weirdnesses of rfc3107
532 the label length (actually the label + COS bits)
533 is added to the prefix length;
534 we also do only read out just one label -
535 there is no real application for advertisement of
536 stacked labels in a a single BGP message
537 */
538
539 if (24 > plen)
540 return -1;
541
542 plen-=24; /* adjust prefixlen - labellength */
543
544 if (32 < plen)
545 return -1;
546 itemlen -= 4;
547
548 memset(&addr, 0, sizeof(addr));
549 plenbytes = (plen + 7) / 8;
550 TCHECK2(pptr[4], plenbytes);
551 ITEMCHECK(plenbytes);
552 memcpy(&addr, &pptr[4], plenbytes);
553 if (plen % 8) {
554 ((u_char *)&addr)[plenbytes - 1] &=
555 ((0xff00 >> (plen % 8)) & 0xff);
556 }
557 /* the label may get offsetted by 4 bits so lets shift it right */
558 snprintf(buf, buflen, "%s/%d, label:%u %s",
559 getname((u_char *)&addr),
560 plen,
561 EXTRACT_24BITS(pptr+1)>>4,
562 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
563
564 return 4 + plenbytes;
565
566 trunc:
567 return -2;
568
569 badtlv:
570 return -3;
571 }
572
573 /*
574 * bgp_vpn_ip_print
575 *
576 * print an ipv4 or ipv6 address into a buffer dependend on address length.
577 */
578 static char *
579 bgp_vpn_ip_print (const u_char *pptr, u_int addr_length) {
580
581 /* worst case string is s fully formatted v6 address */
582 static char addr[sizeof("1234:5678:89ab:cdef:1234:5678:89ab:cdef")];
583 char *pos = addr;
584
585 switch(addr_length) {
586 case (sizeof(struct in_addr) << 3): /* 32 */
587 TCHECK2(pptr[0], sizeof(struct in_addr));
588 snprintf(pos, sizeof(addr), "%s", ipaddr_string(pptr));
589 break;
590 #ifdef INET6
591 case (sizeof(struct in6_addr) << 3): /* 128 */
592 TCHECK2(pptr[0], sizeof(struct in6_addr));
593 snprintf(pos, sizeof(addr), "%s", ip6addr_string(pptr));
594 break;
595 #endif
596 default:
597 snprintf(pos, sizeof(addr), "bogus address length %u", addr_length);
598 break;
599 }
600 pos += strlen(pos);
601
602 trunc:
603 *(pos) = '\0';
604 return (addr);
605 }
606
607 /*
608 * bgp_vpn_sg_print
609 *
610 * print an multicast s,g entry into a buffer.
611 * the s,g entry is encoded like this.
612 *
613 * +-----------------------------------+
614 * | Multicast Source Length (1 octet) |
615 * +-----------------------------------+
616 * | Multicast Source (Variable) |
617 * +-----------------------------------+
618 * | Multicast Group Length (1 octet) |
619 * +-----------------------------------+
620 * | Multicast Group (Variable) |
621 * +-----------------------------------+
622 *
623 * return the number of bytes read from the wire.
624 */
625 static int
626 bgp_vpn_sg_print (const u_char *pptr, char *buf, u_int buflen) {
627
628 u_int8_t addr_length;
629 u_int total_length, offset;
630
631 total_length = 0;
632
633 /* Source address length, encoded in bits */
634 TCHECK2(pptr[0], 1);
635 addr_length = *pptr++;
636
637 /* Source address */
638 TCHECK2(pptr[0], (addr_length >> 3));
639 total_length += (addr_length >> 3) + 1;
640 offset = strlen(buf);
641 if (addr_length) {
642 snprintf(buf + offset, buflen - offset, ", Source %s",
643 bgp_vpn_ip_print(pptr, addr_length));
644 pptr += (addr_length >> 3);
645 }
646
647 /* Group address length, encoded in bits */
648 TCHECK2(pptr[0], 1);
649 addr_length = *pptr++;
650
651 /* Group address */
652 TCHECK2(pptr[0], (addr_length >> 3));
653 total_length += (addr_length >> 3) + 1;
654 offset = strlen(buf);
655 if (addr_length) {
656 snprintf(buf + offset, buflen - offset, ", Group %s",
657 bgp_vpn_ip_print(pptr, addr_length));
658 pptr += (addr_length >> 3);
659 }
660
661 trunc:
662 return (total_length);
663 }
664
665
666 /* RDs and RTs share the same semantics
667 * we use bgp_vpn_rd_print for
668 * printing route targets inside a NLRI */
669 char *
670 bgp_vpn_rd_print (const u_char *pptr) {
671
672 /* allocate space for the largest possible string */
673 static char rd[sizeof("xxxxxxxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")];
674 char *pos = rd;
675
676 /* ok lets load the RD format */
677 switch (EXTRACT_16BITS(pptr)) {
678
679 /* 2-byte-AS:number fmt*/
680 case 0:
681 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u (= %u.%u.%u.%u)",
682 EXTRACT_16BITS(pptr+2),
683 EXTRACT_32BITS(pptr+4),
684 *(pptr+4), *(pptr+5), *(pptr+6), *(pptr+7));
685 break;
686 /* IP-address:AS fmt*/
687
688 case 1:
689 snprintf(pos, sizeof(rd) - (pos - rd), "%u.%u.%u.%u:%u",
690 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
691 break;
692
693 /* 4-byte-AS:number fmt*/
694 case 2:
695 snprintf(pos, sizeof(rd) - (pos - rd), "%s:%u (%u.%u.%u.%u:%u)",
696 as_printf(astostr, sizeof(astostr), EXTRACT_32BITS(pptr+2)),
697 EXTRACT_16BITS(pptr+6), *(pptr+2), *(pptr+3), *(pptr+4),
698 *(pptr+5), EXTRACT_16BITS(pptr+6));
699 break;
700 default:
701 snprintf(pos, sizeof(rd) - (pos - rd), "unknown RD format");
702 break;
703 }
704 pos += strlen(pos);
705 *(pos) = '\0';
706 return (rd);
707 }
708
709 static int
710 decode_rt_routing_info(const u_char *pptr, char *buf, u_int buflen)
711 {
712 u_int8_t route_target[8];
713 u_int plen;
714
715 TCHECK(pptr[0]);
716 plen = pptr[0]; /* get prefix length */
717
718 if (0 == plen)
719 return 1; /* default route target */
720
721 if (32 > plen)
722 return -1;
723
724 plen-=32; /* adjust prefix length */
725
726 if (64 < plen)
727 return -1;
728
729 memset(&route_target, 0, sizeof(route_target));
730 TCHECK2(pptr[1], (plen + 7) / 8);
731 memcpy(&route_target, &pptr[1], (plen + 7) / 8);
732 if (plen % 8) {
733 ((u_char *)&route_target)[(plen + 7) / 8 - 1] &=
734 ((0xff00 >> (plen % 8)) & 0xff);
735 }
736 snprintf(buf, buflen, "origin AS: %s, route target %s",
737 as_printf(astostr, sizeof(astostr), EXTRACT_32BITS(pptr+1)),
738 bgp_vpn_rd_print((u_char *)&route_target));
739
740 return 5 + (plen + 7) / 8;
741
742 trunc:
743 return -2;
744 }
745
746 static int
747 decode_labeled_vpn_prefix4(const u_char *pptr, char *buf, u_int buflen)
748 {
749 struct in_addr addr;
750 u_int plen;
751
752 TCHECK(pptr[0]);
753 plen = pptr[0]; /* get prefix length */
754
755 if ((24+64) > plen)
756 return -1;
757
758 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
759
760 if (32 < plen)
761 return -1;
762
763 memset(&addr, 0, sizeof(addr));
764 TCHECK2(pptr[12], (plen + 7) / 8);
765 memcpy(&addr, &pptr[12], (plen + 7) / 8);
766 if (plen % 8) {
767 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
768 ((0xff00 >> (plen % 8)) & 0xff);
769 }
770 /* the label may get offsetted by 4 bits so lets shift it right */
771 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
772 bgp_vpn_rd_print(pptr+4),
773 getname((u_char *)&addr),
774 plen,
775 EXTRACT_24BITS(pptr+1)>>4,
776 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
777
778 return 12 + (plen + 7) / 8;
779
780 trunc:
781 return -2;
782 }
783
784 /*
785 * +-------------------------------+
786 * | |
787 * | RD:IPv4-address (12 octets) |
788 * | |
789 * +-------------------------------+
790 * | MDT Group-address (4 octets) |
791 * +-------------------------------+
792 */
793
794 #define MDT_VPN_NLRI_LEN 16
795
796 static int
797 decode_mdt_vpn_nlri(const u_char *pptr, char *buf, u_int buflen)
798 {
799
800 const u_char *rd;
801 const u_char *vpn_ip;
802
803 TCHECK(pptr[0]);
804
805 /* if the NLRI is not predefined length, quit.*/
806 if (*pptr != MDT_VPN_NLRI_LEN * NBBY)
807 return -1;
808 pptr++;
809
810 /* RD */
811 TCHECK2(pptr[0], 8);
812 rd = pptr;
813 pptr+=8;
814
815 /* IPv4 address */
816 TCHECK2(pptr[0], sizeof(struct in_addr));
817 vpn_ip = pptr;
818 pptr+=sizeof(struct in_addr);
819
820 /* MDT Group Address */
821 TCHECK2(pptr[0], sizeof(struct in_addr));
822
823 snprintf(buf, buflen, "RD: %s, VPN IP Address: %s, MC Group Address: %s",
824 bgp_vpn_rd_print(rd), ipaddr_string(vpn_ip), ipaddr_string(pptr));
825
826 return MDT_VPN_NLRI_LEN + 1;
827
828 trunc:
829
830 return -2;
831 }
832
833 #define BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI 1
834 #define BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI 2
835 #define BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI 3
836 #define BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF 4
837 #define BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE 5
838 #define BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN 6
839 #define BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN 7
840
841 static struct tok bgp_multicast_vpn_route_type_values[] = {
842 { BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI, "Intra-AS I-PMSI"},
843 { BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI, "Inter-AS I-PMSI"},
844 { BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI, "S-PMSI"},
845 { BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF, "Intra-AS Segment-Leaf"},
846 { BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE, "Source-Active"},
847 { BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN, "Shared Tree Join"},
848 { BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN, "Source Tree Join"},
849 };
850
851 static int
852 decode_multicast_vpn(const u_char *pptr, char *buf, u_int buflen)
853 {
854 u_int8_t route_type, route_length, addr_length, sg_length;
855 u_int offset;
856
857 TCHECK2(pptr[0], 2);
858 route_type = *pptr++;
859 route_length = *pptr++;
860
861 snprintf(buf, buflen, "Route-Type: %s (%u), length: %u",
862 tok2str(bgp_multicast_vpn_route_type_values,
863 "Unknown", route_type),
864 route_type, route_length);
865
866 switch(route_type) {
867 case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI:
868 TCHECK2(pptr[0], BGP_VPN_RD_LEN);
869 offset = strlen(buf);
870 snprintf(buf + offset, buflen - offset, ", RD: %s, Originator %s",
871 bgp_vpn_rd_print(pptr),
872 bgp_vpn_ip_print(pptr + BGP_VPN_RD_LEN,
873 (route_length - BGP_VPN_RD_LEN) << 3));
874 break;
875 case BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI:
876 TCHECK2(pptr[0], BGP_VPN_RD_LEN + 4);
877 offset = strlen(buf);
878 snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %s",
879 bgp_vpn_rd_print(pptr),
880 as_printf(astostr, sizeof(astostr),
881 EXTRACT_32BITS(pptr + BGP_VPN_RD_LEN)));
882 break;
883
884 case BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI:
885 TCHECK2(pptr[0], BGP_VPN_RD_LEN);
886 offset = strlen(buf);
887 snprintf(buf + offset, buflen - offset, ", RD: %s",
888 bgp_vpn_rd_print(pptr));
889 pptr += BGP_VPN_RD_LEN;
890
891 sg_length = bgp_vpn_sg_print(pptr, buf, buflen);
892 addr_length = route_length - sg_length;
893
894 TCHECK2(pptr[0], addr_length);
895 offset = strlen(buf);
896 snprintf(buf + offset, buflen - offset, ", Originator %s",
897 bgp_vpn_ip_print(pptr, addr_length << 3));
898 break;
899
900 case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE:
901 TCHECK2(pptr[0], BGP_VPN_RD_LEN);
902 offset = strlen(buf);
903 snprintf(buf + offset, buflen - offset, ", RD: %s",
904 bgp_vpn_rd_print(pptr));
905 pptr += BGP_VPN_RD_LEN;
906
907 bgp_vpn_sg_print(pptr, buf, buflen);
908 break;
909
910 case BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN: /* fall through */
911 case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN:
912 TCHECK2(pptr[0], BGP_VPN_RD_LEN);
913 offset = strlen(buf);
914 snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %s",
915 bgp_vpn_rd_print(pptr),
916 as_printf(astostr, sizeof(astostr),
917 EXTRACT_32BITS(pptr + BGP_VPN_RD_LEN)));
918 pptr += BGP_VPN_RD_LEN;
919
920 bgp_vpn_sg_print(pptr, buf, buflen);
921 break;
922
923 /*
924 * no per route-type printing yet.
925 */
926 case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF:
927 default:
928 break;
929 }
930
931 return route_length + 2;
932
933 trunc:
934 return -2;
935 }
936
937 /*
938 * As I remember, some versions of systems have an snprintf() that
939 * returns -1 if the buffer would have overflowed. If the return
940 * value is negative, set buflen to 0, to indicate that we've filled
941 * the buffer up.
942 *
943 * If the return value is greater than buflen, that means that
944 * the buffer would have overflowed; again, set buflen to 0 in
945 * that case.
946 */
947 #define UPDATE_BUF_BUFLEN(buf, buflen, strlen) \
948 if (strlen<0) \
949 buflen=0; \
950 else if ((u_int)strlen>buflen) \
951 buflen=0; \
952 else { \
953 buflen-=strlen; \
954 buf+=strlen; \
955 }
956
957 static int
958 decode_labeled_vpn_l2(const u_char *pptr, char *buf, u_int buflen)
959 {
960 int plen,tlen,strlen,tlv_type,tlv_len,ttlv_len;
961
962 TCHECK2(pptr[0], 2);
963 plen=EXTRACT_16BITS(pptr);
964 tlen=plen;
965 pptr+=2;
966 /* Old and new L2VPN NLRI share AFI/SAFI
967 * -> Assume a 12 Byte-length NLRI is auto-discovery-only
968 * and > 17 as old format. Complain for the middle case
969 */
970 if (plen==12) {
971 /* assume AD-only with RD, BGPNH */
972 TCHECK2(pptr[0],12);
973 buf[0]='\0';
974 strlen=snprintf(buf, buflen, "RD: %s, BGPNH: %s",
975 bgp_vpn_rd_print(pptr),
976 /* need something like getname() here */
977 getname(pptr+8)
978 );
979 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
980 pptr+=12;
981 tlen-=12;
982 return plen;
983 } else if (plen>17) {
984 /* assume old format */
985 /* RD, ID, LBLKOFF, LBLBASE */
986
987 TCHECK2(pptr[0],15);
988 buf[0]='\0';
989 strlen=snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u",
990 bgp_vpn_rd_print(pptr),
991 EXTRACT_16BITS(pptr+8),
992 EXTRACT_16BITS(pptr+10),
993 EXTRACT_24BITS(pptr+12)>>4); /* the label is offsetted by 4 bits so lets shift it right */
994 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
995 pptr+=15;
996 tlen-=15;
997
998 /* ok now the variable part - lets read out TLVs*/
999 while (tlen>0) {
1000 if (tlen < 3)
1001 return -1;
1002 TCHECK2(pptr[0], 3);
1003 tlv_type=*pptr++;
1004 tlv_len=EXTRACT_16BITS(pptr);
1005 ttlv_len=tlv_len;
1006 pptr+=2;
1007
1008 switch(tlv_type) {
1009 case 1:
1010 if (buflen!=0) {
1011 strlen=snprintf(buf,buflen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
1012 tlv_type,
1013 tlv_len);
1014 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
1015 }
1016 ttlv_len=ttlv_len/8+1; /* how many bytes do we need to read ? */
1017 while (ttlv_len>0) {
1018 TCHECK(pptr[0]);
1019 if (buflen!=0) {
1020 strlen=snprintf(buf,buflen, "%02x",*pptr++);
1021 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
1022 }
1023 ttlv_len--;
1024 }
1025 break;
1026 default:
1027 if (buflen!=0) {
1028 strlen=snprintf(buf,buflen, "\n\t\tunknown TLV #%u, length: %u",
1029 tlv_type,
1030 tlv_len);
1031 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
1032 }
1033 break;
1034 }
1035 tlen-=(tlv_len<<3); /* the tlv-length is expressed in bits so lets shift it right */
1036 }
1037 return plen+2;
1038
1039 } else {
1040 /* complain bitterly ? */
1041 /* fall through */
1042 goto trunc;
1043 }
1044
1045 trunc:
1046 return -2;
1047 }
1048
1049 #ifdef INET6
1050 int
1051 decode_prefix6(const u_char *pd, u_int itemlen, char *buf, u_int buflen)
1052 {
1053 struct in6_addr addr;
1054 u_int plen, plenbytes;
1055
1056 TCHECK(pd[0]);
1057 ITEMCHECK(1);
1058 plen = pd[0];
1059 if (128 < plen)
1060 return -1;
1061 itemlen -= 1;
1062
1063 memset(&addr, 0, sizeof(addr));
1064 plenbytes = (plen + 7) / 8;
1065 TCHECK2(pd[1], plenbytes);
1066 ITEMCHECK(plenbytes);
1067 memcpy(&addr, &pd[1], plenbytes);
1068 if (plen % 8) {
1069 addr.s6_addr[plenbytes - 1] &=
1070 ((0xff00 >> (plen % 8)) & 0xff);
1071 }
1072 snprintf(buf, buflen, "%s/%d", getname6((u_char *)&addr), plen);
1073 return 1 + plenbytes;
1074
1075 trunc:
1076 return -2;
1077
1078 badtlv:
1079 return -3;
1080 }
1081
1082 static int
1083 decode_labeled_prefix6(const u_char *pptr, u_int itemlen, char *buf, u_int buflen)
1084 {
1085 struct in6_addr addr;
1086 u_int plen, plenbytes;
1087
1088 /* prefix length and label = 4 bytes */
1089 TCHECK2(pptr[0], 4);
1090 ITEMCHECK(4);
1091 plen = pptr[0]; /* get prefix length */
1092
1093 if (24 > plen)
1094 return -1;
1095
1096 plen-=24; /* adjust prefixlen - labellength */
1097
1098 if (128 < plen)
1099 return -1;
1100 itemlen -= 4;
1101
1102 memset(&addr, 0, sizeof(addr));
1103 plenbytes = (plen + 7) / 8;
1104 TCHECK2(pptr[4], plenbytes);
1105 memcpy(&addr, &pptr[4], plenbytes);
1106 if (plen % 8) {
1107 addr.s6_addr[plenbytes - 1] &=
1108 ((0xff00 >> (plen % 8)) & 0xff);
1109 }
1110 /* the label may get offsetted by 4 bits so lets shift it right */
1111 snprintf(buf, buflen, "%s/%d, label:%u %s",
1112 getname6((u_char *)&addr),
1113 plen,
1114 EXTRACT_24BITS(pptr+1)>>4,
1115 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
1116
1117 return 4 + plenbytes;
1118
1119 trunc:
1120 return -2;
1121
1122 badtlv:
1123 return -3;
1124 }
1125
1126 static int
1127 decode_labeled_vpn_prefix6(const u_char *pptr, char *buf, u_int buflen)
1128 {
1129 struct in6_addr addr;
1130 u_int plen;
1131
1132 TCHECK(pptr[0]);
1133 plen = pptr[0]; /* get prefix length */
1134
1135 if ((24+64) > plen)
1136 return -1;
1137
1138 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
1139
1140 if (128 < plen)
1141 return -1;
1142
1143 memset(&addr, 0, sizeof(addr));
1144 TCHECK2(pptr[12], (plen + 7) / 8);
1145 memcpy(&addr, &pptr[12], (plen + 7) / 8);
1146 if (plen % 8) {
1147 addr.s6_addr[(plen + 7) / 8 - 1] &=
1148 ((0xff00 >> (plen % 8)) & 0xff);
1149 }
1150 /* the label may get offsetted by 4 bits so lets shift it right */
1151 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
1152 bgp_vpn_rd_print(pptr+4),
1153 getname6((u_char *)&addr),
1154 plen,
1155 EXTRACT_24BITS(pptr+1)>>4,
1156 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
1157
1158 return 12 + (plen + 7) / 8;
1159
1160 trunc:
1161 return -2;
1162 }
1163 #endif
1164
1165 static int
1166 decode_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
1167 {
1168 u_int8_t addr[19];
1169 u_int plen;
1170
1171 TCHECK(pptr[0]);
1172 plen = pptr[0]; /* get prefix length */
1173
1174 if (152 < plen)
1175 return -1;
1176
1177 memset(&addr, 0, sizeof(addr));
1178 TCHECK2(pptr[4], (plen + 7) / 8);
1179 memcpy(&addr, &pptr[4], (plen + 7) / 8);
1180 if (plen % 8) {
1181 addr[(plen + 7) / 8 - 1] &=
1182 ((0xff00 >> (plen % 8)) & 0xff);
1183 }
1184 snprintf(buf, buflen, "%s/%d",
1185 isonsap_string(addr,(plen + 7) / 8),
1186 plen);
1187
1188 return 1 + (plen + 7) / 8;
1189
1190 trunc:
1191 return -2;
1192 }
1193
1194 static int
1195 decode_labeled_vpn_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
1196 {
1197 u_int8_t addr[19];
1198 u_int plen;
1199
1200 TCHECK(pptr[0]);
1201 plen = pptr[0]; /* get prefix length */
1202
1203 if ((24+64) > plen)
1204 return -1;
1205
1206 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
1207
1208 if (152 < plen)
1209 return -1;
1210
1211 memset(&addr, 0, sizeof(addr));
1212 TCHECK2(pptr[12], (plen + 7) / 8);
1213 memcpy(&addr, &pptr[12], (plen + 7) / 8);
1214 if (plen % 8) {
1215 addr[(plen + 7) / 8 - 1] &=
1216 ((0xff00 >> (plen % 8)) & 0xff);
1217 }
1218 /* the label may get offsetted by 4 bits so lets shift it right */
1219 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
1220 bgp_vpn_rd_print(pptr+4),
1221 isonsap_string(addr,(plen + 7) / 8),
1222 plen,
1223 EXTRACT_24BITS(pptr+1)>>4,
1224 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
1225
1226 return 12 + (plen + 7) / 8;
1227
1228 trunc:
1229 return -2;
1230 }
1231
1232 /*
1233 * bgp_attr_get_as_size
1234 *
1235 * Try to find the size of the ASs encoded in an as-path. It is not obvious, as
1236 * both Old speakers that do not support 4 byte AS, and the new speakers that do
1237 * support, exchange AS-Path with the same path-attribute type value 0x02.
1238 */
1239 static int
1240 bgp_attr_get_as_size (u_int8_t bgpa_type, const u_char *pptr, int len)
1241 {
1242 const u_char *tptr = pptr;
1243
1244 /*
1245 * If the path attribute is the optional AS4 path type, then we already
1246 * know, that ASs must be encoded in 4 byte format.
1247 */
1248 if (bgpa_type == BGPTYPE_AS4_PATH) {
1249 return 4;
1250 }
1251
1252 /*
1253 * Let us assume that ASs are of 2 bytes in size, and check if the AS-Path
1254 * TLV is good. If not, ask the caller to try with AS encoded as 4 bytes
1255 * each.
1256 */
1257 while (tptr < pptr + len) {
1258 TCHECK(tptr[0]);
1259
1260 /*
1261 * If we do not find a valid segment type, our guess might be wrong.
1262 */
1263 if (tptr[0] < BGP_AS_SEG_TYPE_MIN || tptr[0] > BGP_AS_SEG_TYPE_MAX) {
1264 goto trunc;
1265 }
1266 TCHECK(tptr[1]);
1267 tptr += 2 + tptr[1] * 2;
1268 }
1269
1270 /*
1271 * If we correctly reached end of the AS path attribute data content,
1272 * then most likely ASs were indeed encoded as 2 bytes.
1273 */
1274 if (tptr == pptr + len) {
1275 return 2;
1276 }
1277
1278 trunc:
1279
1280 /*
1281 * We can come here, either we did not have enough data, or if we
1282 * try to decode 4 byte ASs in 2 byte format. Either way, return 4,
1283 * so that calller can try to decode each AS as of 4 bytes. If indeed
1284 * there was not enough data, it will crib and end the parse anyways.
1285 */
1286 return 4;
1287 }
1288
1289 static int
1290 bgp_attr_print(u_int atype, const u_char *pptr, u_int len)
1291 {
1292 int i;
1293 u_int16_t af;
1294 u_int8_t safi, snpa, nhlen;
1295 union { /* copy buffer for bandwidth values */
1296 float f;
1297 u_int32_t i;
1298 } bw;
1299 int advance;
1300 u_int tlen;
1301 const u_char *tptr;
1302 char buf[MAXHOSTNAMELEN + 100];
1303 char tokbuf[TOKBUFSIZE];
1304 int as_size;
1305
1306 tptr = pptr;
1307 tlen=len;
1308
1309 switch (atype) {
1310 case BGPTYPE_ORIGIN:
1311 if (len != 1)
1312 printf("invalid len");
1313 else {
1314 TCHECK(*tptr);
1315 printf("%s", tok2strbuf(bgp_origin_values,
1316 "Unknown Origin Typecode",
1317 tptr[0],
1318 tokbuf, sizeof(tokbuf)));
1319 }
1320 break;
1321
1322
1323 /*
1324 * Process AS4 byte path and AS2 byte path attributes here.
1325 */
1326 case BGPTYPE_AS4_PATH:
1327 case BGPTYPE_AS_PATH:
1328 if (len % 2) {
1329 printf("invalid len");
1330 break;
1331 }
1332 if (!len) {
1333 printf("empty");
1334 break;
1335 }
1336
1337 /*
1338 * BGP updates exchanged between New speakers that support 4
1339 * byte AS, ASs are always encoded in 4 bytes. There is no
1340 * definitive way to find this, just by the packet's
1341 * contents. So, check for packet's TLV's sanity assuming
1342 * 2 bytes first, and it does not pass, assume that ASs are
1343 * encoded in 4 bytes format and move on.
1344 */
1345 as_size = bgp_attr_get_as_size(atype, pptr, len);
1346
1347 while (tptr < pptr + len) {
1348 TCHECK(tptr[0]);
1349 printf("%s", tok2strbuf(bgp_as_path_segment_open_values,
1350 "?", tptr[0],
1351 tokbuf, sizeof(tokbuf)));
1352 for (i = 0; i < tptr[1] * as_size; i += as_size) {
1353 TCHECK2(tptr[2 + i], as_size);
1354 printf("%s ",
1355 as_printf(astostr, sizeof(astostr),
1356 as_size == 2 ?
1357 EXTRACT_16BITS(&tptr[2 + i]) :
1358 EXTRACT_32BITS(&tptr[2 + i])));
1359 }
1360 TCHECK(tptr[0]);
1361 printf("%s", tok2strbuf(bgp_as_path_segment_close_values,
1362 "?", tptr[0],
1363 tokbuf, sizeof(tokbuf)));
1364 TCHECK(tptr[1]);
1365 tptr += 2 + tptr[1] * as_size;
1366 }
1367 break;
1368 case BGPTYPE_NEXT_HOP:
1369 if (len != 4)
1370 printf("invalid len");
1371 else {
1372 TCHECK2(tptr[0], 4);
1373 printf("%s", getname(tptr));
1374 }
1375 break;
1376 case BGPTYPE_MULTI_EXIT_DISC:
1377 case BGPTYPE_LOCAL_PREF:
1378 if (len != 4)
1379 printf("invalid len");
1380 else {
1381 TCHECK2(tptr[0], 4);
1382 printf("%u", EXTRACT_32BITS(tptr));
1383 }
1384 break;
1385 case BGPTYPE_ATOMIC_AGGREGATE:
1386 if (len != 0)
1387 printf("invalid len");
1388 break;
1389 case BGPTYPE_AGGREGATOR:
1390
1391 /*
1392 * Depending on the AS encoded is of 2 bytes or of 4 bytes,
1393 * the length of this PA can be either 6 bytes or 8 bytes.
1394 */
1395 if (len != 6 && len != 8) {
1396 printf("invalid len");
1397 break;
1398 }
1399 TCHECK2(tptr[0], len);
1400 if (len == 6) {
1401 printf(" AS #%s, origin %s",
1402 as_printf(astostr, sizeof(astostr), EXTRACT_16BITS(tptr)),
1403 getname(tptr + 2));
1404 } else {
1405 printf(" AS #%s, origin %s",
1406 as_printf(astostr, sizeof(astostr),
1407 EXTRACT_32BITS(tptr)), getname(tptr + 4));
1408 }
1409 break;
1410 case BGPTYPE_AGGREGATOR4:
1411 if (len != 8) {
1412 printf("invalid len");
1413 break;
1414 }
1415 TCHECK2(tptr[0], 8);
1416 printf(" AS #%s, origin %s",
1417 as_printf(astostr, sizeof(astostr), EXTRACT_32BITS(tptr)),
1418 getname(tptr + 4));
1419 break;
1420 case BGPTYPE_COMMUNITIES:
1421 if (len % 4) {
1422 printf("invalid len");
1423 break;
1424 }
1425 while (tlen>0) {
1426 u_int32_t comm;
1427 TCHECK2(tptr[0], 4);
1428 comm = EXTRACT_32BITS(tptr);
1429 switch (comm) {
1430 case BGP_COMMUNITY_NO_EXPORT:
1431 printf(" NO_EXPORT");
1432 break;
1433 case BGP_COMMUNITY_NO_ADVERT:
1434 printf(" NO_ADVERTISE");
1435 break;
1436 case BGP_COMMUNITY_NO_EXPORT_SUBCONFED:
1437 printf(" NO_EXPORT_SUBCONFED");
1438 break;
1439 default:
1440 printf("%u:%u%s",
1441 (comm >> 16) & 0xffff,
1442 comm & 0xffff,
1443 (tlen>4) ? ", " : "");
1444 break;
1445 }
1446 tlen -=4;
1447 tptr +=4;
1448 }
1449 break;
1450 case BGPTYPE_ORIGINATOR_ID:
1451 if (len != 4) {
1452 printf("invalid len");
1453 break;
1454 }
1455 TCHECK2(tptr[0], 4);
1456 printf("%s",getname(tptr));
1457 break;
1458 case BGPTYPE_CLUSTER_LIST:
1459 if (len % 4) {
1460 printf("invalid len");
1461 break;
1462 }
1463 while (tlen>0) {
1464 TCHECK2(tptr[0], 4);
1465 printf("%s%s",
1466 getname(tptr),
1467 (tlen>4) ? ", " : "");
1468 tlen -=4;
1469 tptr +=4;
1470 }
1471 break;
1472 case BGPTYPE_MP_REACH_NLRI:
1473 TCHECK2(tptr[0], 3);
1474 af = EXTRACT_16BITS(tptr);
1475 safi = tptr[2];
1476
1477 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1478 tok2strbuf(af_values, "Unknown AFI", af,
1479 tokbuf, sizeof(tokbuf)),
1480 af,
1481 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1482 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1483 tokbuf, sizeof(tokbuf)),
1484 safi);
1485
1486 switch(af<<8 | safi) {
1487 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1488 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1489 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1490 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1491 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1492 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1493 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1494 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1495 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN):
1496 case (AFNUM_INET<<8 | SAFNUM_MDT):
1497 #ifdef INET6
1498 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1499 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1500 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1501 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1502 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1503 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1504 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1505 #endif
1506 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1507 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1508 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1509 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1510 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1511 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1512 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1513 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1514 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1515 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1516 break;
1517 default:
1518 TCHECK2(tptr[0], tlen);
1519 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1520 if (vflag <= 1)
1521 print_unknown_data(tptr,"\n\t ",tlen);
1522 goto done;
1523 break;
1524 }
1525
1526 tptr +=3;
1527
1528 TCHECK(tptr[0]);
1529 nhlen = tptr[0];
1530 tlen = nhlen;
1531 tptr++;
1532
1533 if (tlen) {
1534 printf("\n\t nexthop: ");
1535 while (tlen > 0) {
1536 switch(af<<8 | safi) {
1537 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1538 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1539 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1540 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1541 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1542 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN):
1543 case (AFNUM_INET<<8 | SAFNUM_MDT):
1544 if (tlen < (int)sizeof(struct in_addr)) {
1545 printf("invalid len");
1546 tlen = 0;
1547 } else {
1548 TCHECK2(tptr[0], sizeof(struct in_addr));
1549 printf("%s",getname(tptr));
1550 tlen -= sizeof(struct in_addr);
1551 tptr += sizeof(struct in_addr);
1552 }
1553 break;
1554 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1555 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1556 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1557 if (tlen < (int)(sizeof(struct in_addr)+BGP_VPN_RD_LEN)) {
1558 printf("invalid len");
1559 tlen = 0;
1560 } else {
1561 TCHECK2(tptr[0], sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1562 printf("RD: %s, %s",
1563 bgp_vpn_rd_print(tptr),
1564 getname(tptr+BGP_VPN_RD_LEN));
1565 tlen -= (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1566 tptr += (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1567 }
1568 break;
1569 #ifdef INET6
1570 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1571 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1572 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1573 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1574 if (tlen < (int)sizeof(struct in6_addr)) {
1575 printf("invalid len");
1576 tlen = 0;
1577 } else {
1578 TCHECK2(tptr[0], sizeof(struct in6_addr));
1579 printf("%s", getname6(tptr));
1580 tlen -= sizeof(struct in6_addr);
1581 tptr += sizeof(struct in6_addr);
1582 }
1583 break;
1584 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1585 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1586 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1587 if (tlen < (int)(sizeof(struct in6_addr)+BGP_VPN_RD_LEN)) {
1588 printf("invalid len");
1589 tlen = 0;
1590 } else {
1591 TCHECK2(tptr[0], sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1592 printf("RD: %s, %s",
1593 bgp_vpn_rd_print(tptr),
1594 getname6(tptr+BGP_VPN_RD_LEN));
1595 tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1596 tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1597 }
1598 break;
1599 #endif
1600 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1601 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1602 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1603 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1604 if (tlen < (int)sizeof(struct in_addr)) {
1605 printf("invalid len");
1606 tlen = 0;
1607 } else {
1608 TCHECK2(tptr[0], sizeof(struct in_addr));
1609 printf("%s", getname(tptr));
1610 tlen -= (sizeof(struct in_addr));
1611 tptr += (sizeof(struct in_addr));
1612 }
1613 break;
1614 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1615 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1616 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1617 TCHECK2(tptr[0], tlen);
1618 printf("%s",isonsap_string(tptr,tlen));
1619 tptr += tlen;
1620 tlen = 0;
1621 break;
1622
1623 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1624 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1625 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1626 if (tlen < BGP_VPN_RD_LEN+1) {
1627 printf("invalid len");
1628 tlen = 0;
1629 } else {
1630 TCHECK2(tptr[0], tlen);
1631 printf("RD: %s, %s",
1632 bgp_vpn_rd_print(tptr),
1633 isonsap_string(tptr+BGP_VPN_RD_LEN,tlen-BGP_VPN_RD_LEN));
1634 /* rfc986 mapped IPv4 address ? */
1635 if (EXTRACT_32BITS(tptr+BGP_VPN_RD_LEN) == 0x47000601)
1636 printf(" = %s", getname(tptr+BGP_VPN_RD_LEN+4));
1637 #ifdef INET6
1638 /* rfc1888 mapped IPv6 address ? */
1639 else if (EXTRACT_24BITS(tptr+BGP_VPN_RD_LEN) == 0x350000)
1640 printf(" = %s", getname6(tptr+BGP_VPN_RD_LEN+3));
1641 #endif
1642 tptr += tlen;
1643 tlen = 0;
1644 }
1645 break;
1646 default:
1647 TCHECK2(tptr[0], tlen);
1648 printf("no AFI %u/SAFI %u decoder",af,safi);
1649 if (vflag <= 1)
1650 print_unknown_data(tptr,"\n\t ",tlen);
1651 tptr += tlen;
1652 tlen = 0;
1653 goto done;
1654 break;
1655 }
1656 }
1657 }
1658 printf(", nh-length: %u", nhlen);
1659 tptr += tlen;
1660
1661 TCHECK(tptr[0]);
1662 snpa = tptr[0];
1663 tptr++;
1664
1665 if (snpa) {
1666 printf("\n\t %u SNPA", snpa);
1667 for (/*nothing*/; snpa > 0; snpa--) {
1668 TCHECK(tptr[0]);
1669 printf("\n\t %d bytes", tptr[0]);
1670 tptr += tptr[0] + 1;
1671 }
1672 } else {
1673 printf(", no SNPA");
1674 }
1675
1676 while (len - (tptr - pptr) > 0) {
1677 switch (af<<8 | safi) {
1678 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1679 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1680 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1681 advance = decode_prefix4(tptr, len, buf, sizeof(buf));
1682 if (advance == -1)
1683 printf("\n\t (illegal prefix length)");
1684 else if (advance == -2)
1685 goto trunc;
1686 else if (advance == -3)
1687 break; /* bytes left, but not enough */
1688 else
1689 printf("\n\t %s", buf);
1690 break;
1691 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1692 advance = decode_labeled_prefix4(tptr, len, buf, sizeof(buf));
1693 if (advance == -1)
1694 printf("\n\t (illegal prefix length)");
1695 else if (advance == -2)
1696 goto trunc;
1697 else if (advance == -3)
1698 break; /* bytes left, but not enough */
1699 else
1700 printf("\n\t %s", buf);
1701 break;
1702 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1703 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1704 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1705 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1706 if (advance == -1)
1707 printf("\n\t (illegal prefix length)");
1708 else if (advance == -2)
1709 goto trunc;
1710 else
1711 printf("\n\t %s", buf);
1712 break;
1713 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1714 advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1715 if (advance == -1)
1716 printf("\n\t (illegal prefix length)");
1717 else if (advance == -2)
1718 goto trunc;
1719 else
1720 printf("\n\t %s", buf);
1721 break;
1722 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */
1723 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN):
1724 advance = decode_multicast_vpn(tptr, buf, sizeof(buf));
1725 if (advance == -1)
1726 printf("\n\t (illegal prefix length)");
1727 else if (advance == -2)
1728 goto trunc;
1729 else
1730 printf("\n\t %s", buf);
1731 break;
1732
1733 case (AFNUM_INET<<8 | SAFNUM_MDT):
1734 advance = decode_mdt_vpn_nlri(tptr, buf, sizeof(buf));
1735 if (advance == -1)
1736 printf("\n\t (illegal prefix length)");
1737 else if (advance == -2)
1738 goto trunc;
1739 else
1740 printf("\n\t %s", buf);
1741 break;
1742 #ifdef INET6
1743 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1744 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1745 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1746 advance = decode_prefix6(tptr, len, buf, sizeof(buf));
1747 if (advance == -1)
1748 printf("\n\t (illegal prefix length)");
1749 else if (advance == -2)
1750 goto trunc;
1751 else if (advance == -3)
1752 break; /* bytes left, but not enough */
1753 else
1754 printf("\n\t %s", buf);
1755 break;
1756 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1757 advance = decode_labeled_prefix6(tptr, len, buf, sizeof(buf));
1758 if (advance == -1)
1759 printf("\n\t (illegal prefix length)");
1760 else if (advance == -2)
1761 goto trunc;
1762 else if (advance == -3)
1763 break; /* bytes left, but not enough */
1764 else
1765 printf("\n\t %s", buf);
1766 break;
1767 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1768 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1769 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1770 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1771 if (advance == -1)
1772 printf("\n\t (illegal prefix length)");
1773 else if (advance == -2)
1774 goto trunc;
1775 else
1776 printf("\n\t %s", buf);
1777 break;
1778 #endif
1779 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1780 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1781 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1782 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1783 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1784 if (advance == -1)
1785 printf("\n\t (illegal length)");
1786 else if (advance == -2)
1787 goto trunc;
1788 else
1789 printf("\n\t %s", buf);
1790 break;
1791 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1792 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1793 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1794 advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1795 if (advance == -1)
1796 printf("\n\t (illegal prefix length)");
1797 else if (advance == -2)
1798 goto trunc;
1799 else
1800 printf("\n\t %s", buf);
1801 break;
1802 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1803 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1804 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1805 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1806 if (advance == -1)
1807 printf("\n\t (illegal prefix length)");
1808 else if (advance == -2)
1809 goto trunc;
1810 else
1811 printf("\n\t %s", buf);
1812 break;
1813 default:
1814 TCHECK2(*tptr,tlen);
1815 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1816 if (vflag <= 1)
1817 print_unknown_data(tptr,"\n\t ",tlen);
1818 advance = 0;
1819 tptr = pptr + len;
1820 break;
1821 }
1822 if (advance < 0)
1823 break;
1824 tptr += advance;
1825 }
1826 done:
1827 break;
1828
1829 case BGPTYPE_MP_UNREACH_NLRI:
1830 TCHECK2(tptr[0], BGP_MP_NLRI_MINSIZE);
1831 af = EXTRACT_16BITS(tptr);
1832 safi = tptr[2];
1833
1834 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1835 tok2strbuf(af_values, "Unknown AFI", af,
1836 tokbuf, sizeof(tokbuf)),
1837 af,
1838 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1839 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1840 tokbuf, sizeof(tokbuf)),
1841 safi);
1842
1843 if (len == BGP_MP_NLRI_MINSIZE)
1844 printf("\n\t End-of-Rib Marker (empty NLRI)");
1845
1846 tptr += 3;
1847
1848 while (len - (tptr - pptr) > 0) {
1849 switch (af<<8 | safi) {
1850 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1851 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1852 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1853 advance = decode_prefix4(tptr, len, buf, sizeof(buf));
1854 if (advance == -1)
1855 printf("\n\t (illegal prefix length)");
1856 else if (advance == -2)
1857 goto trunc;
1858 else if (advance == -3)
1859 break; /* bytes left, but not enough */
1860 else
1861 printf("\n\t %s", buf);
1862 break;
1863 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1864 advance = decode_labeled_prefix4(tptr, len, buf, sizeof(buf));
1865 if (advance == -1)
1866 printf("\n\t (illegal prefix length)");
1867 else if (advance == -2)
1868 goto trunc;
1869 else if (advance == -3)
1870 break; /* bytes left, but not enough */
1871 else
1872 printf("\n\t %s", buf);
1873 break;
1874 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1875 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1876 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1877 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1878 if (advance == -1)
1879 printf("\n\t (illegal prefix length)");
1880 else if (advance == -2)
1881 goto trunc;
1882 else
1883 printf("\n\t %s", buf);
1884 break;
1885 #ifdef INET6
1886 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1887 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1888 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1889 advance = decode_prefix6(tptr, len, buf, sizeof(buf));
1890 if (advance == -1)
1891 printf("\n\t (illegal prefix length)");
1892 else if (advance == -2)
1893 goto trunc;
1894 else if (advance == -3)
1895 break; /* bytes left, but not enough */
1896 else
1897 printf("\n\t %s", buf);
1898 break;
1899 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1900 advance = decode_labeled_prefix6(tptr, len, buf, sizeof(buf));
1901 if (advance == -1)
1902 printf("\n\t (illegal prefix length)");
1903 else if (advance == -2)
1904 goto trunc;
1905 else if (advance == -3)
1906 break; /* bytes left, but not enough */
1907 else
1908 printf("\n\t %s", buf);
1909 break;
1910 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1911 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1912 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1913 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1914 if (advance == -1)
1915 printf("\n\t (illegal prefix length)");
1916 else if (advance == -2)
1917 goto trunc;
1918 else
1919 printf("\n\t %s", buf);
1920 break;
1921 #endif
1922 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1923 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1924 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1925 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1926 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1927 if (advance == -1)
1928 printf("\n\t (illegal length)");
1929 else if (advance == -2)
1930 goto trunc;
1931 else
1932 printf("\n\t %s", buf);
1933 break;
1934 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1935 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1936 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1937 advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1938 if (advance == -1)
1939 printf("\n\t (illegal prefix length)");
1940 else if (advance == -2)
1941 goto trunc;
1942 else
1943 printf("\n\t %s", buf);
1944 break;
1945 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1946 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1947 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1948 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1949 if (advance == -1)
1950 printf("\n\t (illegal prefix length)");
1951 else if (advance == -2)
1952 goto trunc;
1953 else
1954 printf("\n\t %s", buf);
1955 break;
1956 case (AFNUM_INET<<8 | SAFNUM_MDT):
1957 advance = decode_mdt_vpn_nlri(tptr, buf, sizeof(buf));
1958 if (advance == -1)
1959 printf("\n\t (illegal prefix length)");
1960 else if (advance == -2)
1961 goto trunc;
1962 else
1963 printf("\n\t %s", buf);
1964 break;
1965 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */
1966 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN):
1967 advance = decode_multicast_vpn(tptr, buf, sizeof(buf));
1968 if (advance == -1)
1969 printf("\n\t (illegal prefix length)");
1970 else if (advance == -2)
1971 goto trunc;
1972 else
1973 printf("\n\t %s", buf);
1974 break;
1975 default:
1976 TCHECK2(*(tptr-3),tlen);
1977 printf("no AFI %u / SAFI %u decoder",af,safi);
1978 if (vflag <= 1)
1979 print_unknown_data(tptr-3,"\n\t ",tlen);
1980 advance = 0;
1981 tptr = pptr + len;
1982 break;
1983 }
1984 if (advance < 0)
1985 break;
1986 tptr += advance;
1987 }
1988 break;
1989 case BGPTYPE_EXTD_COMMUNITIES:
1990 if (len % 8) {
1991 printf("invalid len");
1992 break;
1993 }
1994 while (tlen>0) {
1995 u_int16_t extd_comm;
1996
1997 TCHECK2(tptr[0], 2);
1998 extd_comm=EXTRACT_16BITS(tptr);
1999
2000 printf("\n\t %s (0x%04x), Flags [%s]",
2001 tok2strbuf(bgp_extd_comm_subtype_values,
2002 "unknown extd community typecode",
2003 extd_comm, tokbuf, sizeof(tokbuf)),
2004 extd_comm,
2005 bittok2str(bgp_extd_comm_flag_values, "none", extd_comm));
2006
2007 TCHECK2(*(tptr+2), 6);
2008 switch(extd_comm) {
2009 case BGP_EXT_COM_RT_0:
2010 case BGP_EXT_COM_RO_0:
2011 case BGP_EXT_COM_L2VPN_RT_0:
2012 printf(": %u:%u (= %s)",
2013 EXTRACT_16BITS(tptr+2),
2014 EXTRACT_32BITS(tptr+4),
2015 getname(tptr+4));
2016 break;
2017 case BGP_EXT_COM_RT_1:
2018 case BGP_EXT_COM_RO_1:
2019 case BGP_EXT_COM_L2VPN_RT_1:
2020 case BGP_EXT_COM_VRF_RT_IMP:
2021 printf(": %s:%u",
2022 getname(tptr+2),
2023 EXTRACT_16BITS(tptr+6));
2024 break;
2025 case BGP_EXT_COM_RT_2:
2026 case BGP_EXT_COM_RO_2:
2027 printf(": %s:%u",
2028 as_printf(astostr, sizeof(astostr),
2029 EXTRACT_32BITS(tptr+2)), EXTRACT_16BITS(tptr+6));
2030 break;
2031 case BGP_EXT_COM_LINKBAND:
2032 bw.i = EXTRACT_32BITS(tptr+2);
2033 printf(": bandwidth: %.3f Mbps",
2034 bw.f*8/1000000);
2035 break;
2036 case BGP_EXT_COM_VPN_ORIGIN:
2037 case BGP_EXT_COM_VPN_ORIGIN2:
2038 case BGP_EXT_COM_VPN_ORIGIN3:
2039 case BGP_EXT_COM_VPN_ORIGIN4:
2040 case BGP_EXT_COM_OSPF_RID:
2041 case BGP_EXT_COM_OSPF_RID2:
2042 printf("%s", getname(tptr+2));
2043 break;
2044 case BGP_EXT_COM_OSPF_RTYPE:
2045 case BGP_EXT_COM_OSPF_RTYPE2:
2046 printf(": area:%s, router-type:%s, metric-type:%s%s",
2047 getname(tptr+2),
2048 tok2strbuf(bgp_extd_comm_ospf_rtype_values,
2049 "unknown (0x%02x)",
2050 *(tptr+6),
2051 tokbuf, sizeof(tokbuf)),
2052 (*(tptr+7) & BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "",
2053 ((*(tptr+6) == BGP_OSPF_RTYPE_EXT) || (*(tptr+6) == BGP_OSPF_RTYPE_NSSA)) ? "E1" : "");
2054 break;
2055 case BGP_EXT_COM_L2INFO:
2056 printf(": %s Control Flags [0x%02x]:MTU %u",
2057 tok2strbuf(l2vpn_encaps_values,
2058 "unknown encaps",
2059 *(tptr+2),
2060 tokbuf, sizeof(tokbuf)),
2061 *(tptr+3),
2062 EXTRACT_16BITS(tptr+4));
2063 break;
2064 case BGP_EXT_COM_SOURCE_AS:
2065 printf(": AS %u", EXTRACT_16BITS(tptr+2));
2066 break;
2067 default:
2068 TCHECK2(*tptr,8);
2069 print_unknown_data(tptr,"\n\t ",8);
2070 break;
2071 }
2072 tlen -=8;
2073 tptr +=8;
2074 }
2075 break;
2076
2077 case BGPTYPE_PMSI_TUNNEL:
2078 {
2079 u_int8_t tunnel_type, flags;
2080
2081 tunnel_type = *(tptr+1);
2082 flags = *tptr;
2083 tlen = len;
2084
2085 TCHECK2(tptr[0], 5);
2086 printf("\n\t Tunnel-type %s (%u), Flags [%s], MPLS Label %u",
2087 tok2str(bgp_pmsi_tunnel_values, "Unknown", tunnel_type),
2088 tunnel_type,
2089 bittok2str(bgp_pmsi_flag_values, "none", flags),
2090 EXTRACT_24BITS(tptr+2)>>4);
2091
2092 tptr +=5;
2093 tlen -= 5;
2094
2095 switch (tunnel_type) {
2096 case BGP_PMSI_TUNNEL_PIM_SM: /* fall through */
2097 case BGP_PMSI_TUNNEL_PIM_BIDIR:
2098 TCHECK2(tptr[0], 8);
2099 printf("\n\t Sender %s, P-Group %s",
2100 ipaddr_string(tptr),
2101 ipaddr_string(tptr+4));
2102 break;
2103
2104 case BGP_PMSI_TUNNEL_PIM_SSM:
2105 TCHECK2(tptr[0], 8);
2106 printf("\n\t Root-Node %s, P-Group %s",
2107 ipaddr_string(tptr),
2108 ipaddr_string(tptr+4));
2109 break;
2110 case BGP_PMSI_TUNNEL_INGRESS:
2111 TCHECK2(tptr[0], 4);
2112 printf("\n\t Tunnel-Endpoint %s",
2113 ipaddr_string(tptr));
2114 break;
2115 case BGP_PMSI_TUNNEL_LDP_P2MP: /* fall through */
2116 case BGP_PMSI_TUNNEL_LDP_MP2MP:
2117 TCHECK2(tptr[0], 8);
2118 printf("\n\t Root-Node %s, LSP-ID 0x%08x",
2119 ipaddr_string(tptr),
2120 EXTRACT_32BITS(tptr+4));
2121 break;
2122 case BGP_PMSI_TUNNEL_RSVP_P2MP:
2123 TCHECK2(tptr[0], 8);
2124 printf("\n\t Extended-Tunnel-ID %s, P2MP-ID 0x%08x",
2125 ipaddr_string(tptr),
2126 EXTRACT_32BITS(tptr+4));
2127 break;
2128 default:
2129 if (vflag <= 1) {
2130 print_unknown_data(tptr,"\n\t ",tlen);
2131 }
2132 }
2133 break;
2134 }
2135 case BGPTYPE_ATTR_SET:
2136 TCHECK2(tptr[0], 4);
2137 if (len < 4)
2138 goto trunc;
2139 printf("\n\t Origin AS: %s",
2140 as_printf(astostr, sizeof(astostr), EXTRACT_32BITS(tptr)));
2141 tptr+=4;
2142 len -=4;
2143
2144 while (len) {
2145 u_int aflags, atype, alenlen, alen;
2146
2147 TCHECK2(tptr[0], 2);
2148 if (len < 2)
2149 goto trunc;
2150 aflags = *tptr;
2151 atype = *(tptr + 1);
2152 tptr += 2;
2153 len -= 2;
2154 alenlen = bgp_attr_lenlen(aflags, tptr);
2155 TCHECK2(tptr[0], alenlen);
2156 if (len < alenlen)
2157 goto trunc;
2158 alen = bgp_attr_len(aflags, tptr);
2159 tptr += alenlen;
2160 len -= alenlen;
2161
2162 printf("\n\t %s (%u), length: %u",
2163 tok2strbuf(bgp_attr_values,
2164 "Unknown Attribute", atype,
2165 tokbuf, sizeof(tokbuf)),
2166 atype,
2167 alen);
2168
2169 if (aflags) {
2170 printf(", Flags [%s%s%s%s",
2171 aflags & 0x80 ? "O" : "",
2172 aflags & 0x40 ? "T" : "",
2173 aflags & 0x20 ? "P" : "",
2174 aflags & 0x10 ? "E" : "");
2175 if (aflags & 0xf)
2176 printf("+%x", aflags & 0xf);
2177 printf("]: ");
2178 }
2179 /* FIXME check for recursion */
2180 if (!bgp_attr_print(atype, tptr, alen))
2181 return 0;
2182 tptr += alen;
2183 len -= alen;
2184 }
2185 break;
2186
2187
2188 default:
2189 TCHECK2(*pptr,len);
2190 printf("\n\t no Attribute %u decoder",atype); /* we have no decoder for the attribute */
2191 if (vflag <= 1)
2192 print_unknown_data(pptr,"\n\t ",len);
2193 break;
2194 }
2195 if (vflag > 1 && len) { /* omit zero length attributes*/
2196 TCHECK2(*pptr,len);
2197 print_unknown_data(pptr,"\n\t ",len);
2198 }
2199 return 1;
2200
2201 trunc:
2202 return 0;
2203 }
2204
2205 static void
2206 bgp_capabilities_print(const u_char *opt, int caps_len)
2207 {
2208 char tokbuf[TOKBUFSIZE];
2209 char tokbuf2[TOKBUFSIZE];
2210 int cap_type, cap_len, tcap_len, cap_offset;
2211 int i = 0;
2212
2213 while (i < caps_len) {
2214 TCHECK2(opt[i], BGP_CAP_HEADER_SIZE);
2215 cap_type=opt[i];
2216 cap_len=opt[i+1];
2217 tcap_len=cap_len;
2218 printf("\n\t %s (%u), length: %u",
2219 tok2strbuf(bgp_capcode_values, "Unknown",
2220 cap_type, tokbuf, sizeof(tokbuf)),
2221 cap_type,
2222 cap_len);
2223 TCHECK2(opt[i+2], cap_len);
2224 switch (cap_type) {
2225 case BGP_CAPCODE_MP:
2226 printf("\n\t\tAFI %s (%u), SAFI %s (%u)",
2227 tok2strbuf(af_values, "Unknown",
2228 EXTRACT_16BITS(opt+i+2),
2229 tokbuf, sizeof(tokbuf)),
2230 EXTRACT_16BITS(opt+i+2),
2231 tok2strbuf(bgp_safi_values, "Unknown",
2232 opt[i+5],
2233 tokbuf, sizeof(tokbuf)),
2234 opt[i+5]);
2235 break;
2236 case BGP_CAPCODE_RESTART:
2237 printf("\n\t\tRestart Flags: [%s], Restart Time %us",
2238 ((opt[i+2])&0x80) ? "R" : "none",
2239 EXTRACT_16BITS(opt+i+2)&0xfff);
2240 tcap_len-=2;
2241 cap_offset=4;
2242 while(tcap_len>=4) {
2243 printf("\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s",
2244 tok2strbuf(af_values,"Unknown",
2245 EXTRACT_16BITS(opt+i+cap_offset),
2246 tokbuf, sizeof(tokbuf)),
2247 EXTRACT_16BITS(opt+i+cap_offset),
2248 tok2strbuf(bgp_safi_values,"Unknown",
2249 opt[i+cap_offset+2],
2250 tokbuf2, sizeof(tokbuf2)),
2251 opt[i+cap_offset+2],
2252 ((opt[i+cap_offset+3])&0x80) ? "yes" : "no" );
2253 tcap_len-=4;
2254 cap_offset+=4;
2255 }
2256 break;
2257 case BGP_CAPCODE_RR:
2258 case BGP_CAPCODE_RR_CISCO:
2259 break;
2260 case BGP_CAPCODE_AS_NEW:
2261
2262 /*
2263 * Extract the 4 byte AS number encoded.
2264 */
2265 if (cap_len == 4) {
2266 printf("\n\t\t 4 Byte AS %s",
2267 as_printf(astostr, sizeof(astostr),
2268 EXTRACT_32BITS(opt + i + 2)));
2269 }
2270 break;
2271 default:
2272 printf("\n\t\tno decoder for Capability %u",
2273 cap_type);
2274 if (vflag <= 1)
2275 print_unknown_data(&opt[i+2],"\n\t\t",cap_len);
2276 break;
2277 }
2278 if (vflag > 1 && cap_len > 0) {
2279 print_unknown_data(&opt[i+2],"\n\t\t",cap_len);
2280 }
2281 i += BGP_CAP_HEADER_SIZE + cap_len;
2282 }
2283 return;
2284
2285 trunc:
2286 printf("[|BGP]");
2287 }
2288
2289 static void
2290 bgp_open_print(const u_char *dat, int length)
2291 {
2292 struct bgp_open bgpo;
2293 struct bgp_opt bgpopt;
2294 const u_char *opt;
2295 int i;
2296 char tokbuf[TOKBUFSIZE];
2297
2298 TCHECK2(dat[0], BGP_OPEN_SIZE);
2299 memcpy(&bgpo, dat, BGP_OPEN_SIZE);
2300
2301 printf("\n\t Version %d, ", bgpo.bgpo_version);
2302 printf("my AS %s, ",
2303 as_printf(astostr, sizeof(astostr), ntohs(bgpo.bgpo_myas)));
2304 printf("Holdtime %us, ", ntohs(bgpo.bgpo_holdtime));
2305 printf("ID %s", getname((u_char *)&bgpo.bgpo_id));
2306 printf("\n\t Optional parameters, length: %u", bgpo.bgpo_optlen);
2307
2308 /* some little sanity checking */
2309 if (length < bgpo.bgpo_optlen+BGP_OPEN_SIZE)
2310 return;
2311
2312 /* ugly! */
2313 opt = &((const struct bgp_open *)dat)->bgpo_optlen;
2314 opt++;
2315
2316 i = 0;
2317 while (i < bgpo.bgpo_optlen) {
2318 TCHECK2(opt[i], BGP_OPT_SIZE);
2319 memcpy(&bgpopt, &opt[i], BGP_OPT_SIZE);
2320 if (i + 2 + bgpopt.bgpopt_len > bgpo.bgpo_optlen) {
2321 printf("\n\t Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len);
2322 break;
2323 }
2324
2325 printf("\n\t Option %s (%u), length: %u",
2326 tok2strbuf(bgp_opt_values,"Unknown",
2327 bgpopt.bgpopt_type,
2328 tokbuf, sizeof(tokbuf)),
2329 bgpopt.bgpopt_type,
2330 bgpopt.bgpopt_len);
2331
2332 /* now let's decode the options we know*/
2333 switch(bgpopt.bgpopt_type) {
2334
2335 case BGP_OPT_CAP:
2336 bgp_capabilities_print(&opt[i+BGP_OPT_SIZE],
2337 bgpopt.bgpopt_len);
2338 break;
2339
2340 case BGP_OPT_AUTH:
2341 default:
2342 printf("\n\t no decoder for option %u",
2343 bgpopt.bgpopt_type);
2344 break;
2345 }
2346 i += BGP_OPT_SIZE + bgpopt.bgpopt_len;
2347 }
2348 return;
2349 trunc:
2350 printf("[|BGP]");
2351 }
2352
2353 static void
2354 bgp_update_print(const u_char *dat, int length)
2355 {
2356 struct bgp bgp;
2357 const u_char *p;
2358 int withdrawn_routes_len;
2359 int len;
2360 int i;
2361 char tokbuf[TOKBUFSIZE];
2362 #ifndef INET6
2363 char buf[MAXHOSTNAMELEN + 100];
2364 int wpfx;
2365 #endif
2366
2367 TCHECK2(dat[0], BGP_SIZE);
2368 if (length < BGP_SIZE)
2369 goto trunc;
2370 memcpy(&bgp, dat, BGP_SIZE);
2371 p = dat + BGP_SIZE; /*XXX*/
2372 length -= BGP_SIZE;
2373
2374 /* Unfeasible routes */
2375 TCHECK2(p[0], 2);
2376 if (length < 2)
2377 goto trunc;
2378 withdrawn_routes_len = EXTRACT_16BITS(p);
2379 p += 2;
2380 length -= 2;
2381 if (withdrawn_routes_len) {
2382 /*
2383 * Without keeping state from the original NLRI message,
2384 * it's not possible to tell if this a v4 or v6 route,
2385 * so only try to decode it if we're not v6 enabled.
2386 */
2387 TCHECK2(p[0], withdrawn_routes_len);
2388 if (length < withdrawn_routes_len)
2389 goto trunc;
2390 #ifdef INET6
2391 printf("\n\t Withdrawn routes: %d bytes", withdrawn_routes_len);
2392 p += withdrawn_routes_len;
2393 length -= withdrawn_routes_len;
2394 #else
2395 if (withdrawn_routes_len < 2)
2396 goto trunc;
2397 length -= 2;
2398 withdrawn_routes_len -= 2;
2399
2400
2401 printf("\n\t Withdrawn routes:");
2402
2403 while(withdrawn_routes_len > 0) {
2404 wpfx = decode_prefix4(p, withdrawn_routes_len, buf, sizeof(buf));
2405 if (wpfx == -1) {
2406 printf("\n\t (illegal prefix length)");
2407 break;
2408 } else if (wpfx == -2)
2409 goto trunc;
2410 else if (wpfx == -3)
2411 goto trunc; /* bytes left, but not enough */
2412 else {
2413 printf("\n\t %s", buf);
2414 p += wpfx;
2415 length -= wpfx;
2416 withdrawn_routes_len -= wpfx;
2417 }
2418 }
2419 #endif
2420 }
2421
2422 TCHECK2(p[0], 2);
2423 if (length < 2)
2424 goto trunc;
2425 len = EXTRACT_16BITS(p);
2426 p += 2;
2427 length -= 2;
2428
2429 if (withdrawn_routes_len == 0 && len == 0 && length == 0) {
2430 /* No withdrawn routes, no path attributes, no NLRI */
2431 printf("\n\t End-of-Rib Marker (empty NLRI)");
2432 return;
2433 }
2434
2435 if (len) {
2436 /* do something more useful!*/
2437 while (len) {
2438 int aflags, atype, alenlen, alen;
2439
2440 TCHECK2(p[0], 2);
2441 if (len < 2)
2442 goto trunc;
2443 if (length < 2)
2444 goto trunc;
2445 aflags = *p;
2446 atype = *(p + 1);
2447 p += 2;
2448 len -= 2;
2449 length -= 2;
2450 alenlen = bgp_attr_lenlen(aflags, p);
2451 TCHECK2(p[0], alenlen);
2452 if (len < alenlen)
2453 goto trunc;
2454 if (length < alenlen)
2455 goto trunc;
2456 alen = bgp_attr_len(aflags, p);
2457 p += alenlen;
2458 len -= alenlen;
2459 length -= alenlen;
2460
2461 printf("\n\t %s (%u), length: %u",
2462 tok2strbuf(bgp_attr_values, "Unknown Attribute",
2463 atype,
2464 tokbuf, sizeof(tokbuf)),
2465 atype,
2466 alen);
2467
2468 if (aflags) {
2469 printf(", Flags [%s%s%s%s",
2470 aflags & 0x80 ? "O" : "",
2471 aflags & 0x40 ? "T" : "",
2472 aflags & 0x20 ? "P" : "",
2473 aflags & 0x10 ? "E" : "");
2474 if (aflags & 0xf)
2475 printf("+%x", aflags & 0xf);
2476 printf("]: ");
2477 }
2478 if (len < alen)
2479 goto trunc;
2480 if (length < alen)
2481 goto trunc;
2482 if (!bgp_attr_print(atype, p, alen))
2483 goto trunc;
2484 p += alen;
2485 len -= alen;
2486 length -= alen;
2487 }
2488 }
2489
2490 if (length) {
2491 /*
2492 * XXX - what if they're using the "Advertisement of
2493 * Multiple Paths in BGP" feature:
2494 *
2495 * https://datatracker.ietf.org/doc/draft-ietf-idr-add-paths/
2496 *
2497 * http://tools.ietf.org/html/draft-ietf-idr-add-paths-06
2498 */
2499 printf("\n\t Updated routes:");
2500 while (length) {
2501 char buf[MAXHOSTNAMELEN + 100];
2502 i = decode_prefix4(p, length, buf, sizeof(buf));
2503 if (i == -1) {
2504 printf("\n\t (illegal prefix length)");
2505 break;
2506 } else if (i == -2)
2507 goto trunc;
2508 else if (i == -3)
2509 goto trunc; /* bytes left, but not enough */
2510 else {
2511 printf("\n\t %s", buf);
2512 p += i;
2513 length -= i;
2514 }
2515 }
2516 }
2517 return;
2518 trunc:
2519 printf("[|BGP]");
2520 }
2521
2522 static void
2523 bgp_notification_print(const u_char *dat, int length)
2524 {
2525 struct bgp_notification bgpn;
2526 const u_char *tptr;
2527 char tokbuf[TOKBUFSIZE];
2528 char tokbuf2[TOKBUFSIZE];
2529
2530 TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
2531 memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
2532
2533 /* some little sanity checking */
2534 if (length<BGP_NOTIFICATION_SIZE)
2535 return;
2536
2537 printf(", %s (%u)",
2538 tok2strbuf(bgp_notify_major_values, "Unknown Error",
2539 bgpn.bgpn_major, tokbuf, sizeof(tokbuf)),
2540 bgpn.bgpn_major);
2541
2542 switch (bgpn.bgpn_major) {
2543
2544 case BGP_NOTIFY_MAJOR_MSG:
2545 printf(", subcode %s (%u)",
2546 tok2strbuf(bgp_notify_minor_msg_values, "Unknown",
2547 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2548 bgpn.bgpn_minor);
2549 break;
2550 case BGP_NOTIFY_MAJOR_OPEN:
2551 printf(", subcode %s (%u)",
2552 tok2strbuf(bgp_notify_minor_open_values, "Unknown",
2553 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2554 bgpn.bgpn_minor);
2555 break;
2556 case BGP_NOTIFY_MAJOR_UPDATE:
2557 printf(", subcode %s (%u)",
2558 tok2strbuf(bgp_notify_minor_update_values, "Unknown",
2559 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2560 bgpn.bgpn_minor);
2561 break;
2562 case BGP_NOTIFY_MAJOR_CAP:
2563 printf(" subcode %s (%u)",
2564 tok2strbuf(bgp_notify_minor_cap_values, "Unknown",
2565 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2566 bgpn.bgpn_minor);
2567 case BGP_NOTIFY_MAJOR_CEASE:
2568 printf(", subcode %s (%u)",
2569 tok2strbuf(bgp_notify_minor_cease_values, "Unknown",
2570 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2571 bgpn.bgpn_minor);
2572
2573 /* draft-ietf-idr-cease-subcode-02 mentions optionally 7 bytes
2574 * for the maxprefix subtype, which may contain AFI, SAFI and MAXPREFIXES
2575 */
2576 if(bgpn.bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= BGP_NOTIFICATION_SIZE + 7) {
2577 tptr = dat + BGP_NOTIFICATION_SIZE;
2578 TCHECK2(*tptr, 7);
2579 printf(", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
2580 tok2strbuf(af_values, "Unknown",
2581 EXTRACT_16BITS(tptr), tokbuf, sizeof(tokbuf)),
2582 EXTRACT_16BITS(tptr),
2583 tok2strbuf(bgp_safi_values, "Unknown", *(tptr+2),
2584 tokbuf2, sizeof(tokbuf)),
2585 *(tptr+2),
2586 EXTRACT_32BITS(tptr+3));
2587 }
2588 break;
2589 default:
2590 break;
2591 }
2592
2593 return;
2594 trunc:
2595 printf("[|BGP]");
2596 }
2597
2598 static void
2599 bgp_route_refresh_print(const u_char *pptr, int len) {
2600
2601 const struct bgp_route_refresh *bgp_route_refresh_header;
2602 char tokbuf[TOKBUFSIZE];
2603 char tokbuf2[TOKBUFSIZE];
2604
2605 TCHECK2(pptr[0], BGP_ROUTE_REFRESH_SIZE);
2606
2607 /* some little sanity checking */
2608 if (len<BGP_ROUTE_REFRESH_SIZE)
2609 return;
2610
2611 bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
2612
2613 printf("\n\t AFI %s (%u), SAFI %s (%u)",
2614 tok2strbuf(af_values,"Unknown",
2615 /* this stinks but the compiler pads the structure
2616 * weird */
2617 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
2618 tokbuf, sizeof(tokbuf)),
2619 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
2620 tok2strbuf(bgp_safi_values,"Unknown",
2621 bgp_route_refresh_header->safi,
2622 tokbuf2, sizeof(tokbuf2)),
2623 bgp_route_refresh_header->safi);
2624
2625 if (vflag > 1) {
2626 TCHECK2(*pptr, len);
2627 print_unknown_data(pptr,"\n\t ", len);
2628 }
2629
2630 return;
2631 trunc:
2632 printf("[|BGP]");
2633 }
2634
2635 static int
2636 bgp_header_print(const u_char *dat, int length)
2637 {
2638 struct bgp bgp;
2639 char tokbuf[TOKBUFSIZE];
2640
2641 TCHECK2(dat[0], BGP_SIZE);
2642 memcpy(&bgp, dat, BGP_SIZE);
2643 printf("\n\t%s Message (%u), length: %u",
2644 tok2strbuf(bgp_msg_values, "Unknown", bgp.bgp_type,
2645 tokbuf, sizeof(tokbuf)),
2646 bgp.bgp_type,
2647 length);
2648
2649 switch (bgp.bgp_type) {
2650 case BGP_OPEN:
2651 bgp_open_print(dat, length);
2652 break;
2653 case BGP_UPDATE:
2654 bgp_update_print(dat, length);
2655 break;
2656 case BGP_NOTIFICATION:
2657 bgp_notification_print(dat, length);
2658 break;
2659 case BGP_KEEPALIVE:
2660 break;
2661 case BGP_ROUTE_REFRESH:
2662 bgp_route_refresh_print(dat, length);
2663 break;
2664 default:
2665 /* we have no decoder for the BGP message */
2666 TCHECK2(*dat, length);
2667 printf("\n\t no Message %u decoder",bgp.bgp_type);
2668 print_unknown_data(dat,"\n\t ",length);
2669 break;
2670 }
2671 return 1;
2672 trunc:
2673 printf("[|BGP]");
2674 return 0;
2675 }
2676
2677 void
2678 bgp_print(const u_char *dat, int length)
2679 {
2680 const u_char *p;
2681 const u_char *ep;
2682 const u_char *start;
2683 const u_char marker[] = {
2684 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
2685 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
2686 };
2687 struct bgp bgp;
2688 u_int16_t hlen;
2689 char tokbuf[TOKBUFSIZE];
2690
2691 ep = dat + length;
2692 if (snapend < dat + length)
2693 ep = snapend;
2694
2695 printf(": BGP, length: %u",length);
2696
2697 if (vflag < 1) /* lets be less chatty */
2698 return;
2699
2700 p = dat;
2701 start = p;
2702 while (p < ep) {
2703 if (!TTEST2(p[0], 1))
2704 break;
2705 if (p[0] != 0xff) {
2706 p++;
2707 continue;
2708 }
2709
2710 if (!TTEST2(p[0], sizeof(marker)))
2711 break;
2712 if (memcmp(p, marker, sizeof(marker)) != 0) {
2713 p++;
2714 continue;
2715 }
2716
2717 /* found BGP header */
2718 TCHECK2(p[0], BGP_SIZE); /*XXX*/
2719 memcpy(&bgp, p, BGP_SIZE);
2720
2721 if (start != p)
2722 printf(" [|BGP]");
2723
2724 hlen = ntohs(bgp.bgp_len);
2725 if (hlen < BGP_SIZE) {
2726 printf("\n[|BGP Bogus header length %u < %u]", hlen,
2727 BGP_SIZE);
2728 break;
2729 }
2730
2731 if (TTEST2(p[0], hlen)) {
2732 if (!bgp_header_print(p, hlen))
2733 return;
2734 p += hlen;
2735 start = p;
2736 } else {
2737 printf("\n[|BGP %s]",
2738 tok2strbuf(bgp_msg_values,
2739 "Unknown Message Type",
2740 bgp.bgp_type,
2741 tokbuf, sizeof(tokbuf)));
2742 break;
2743 }
2744 }
2745
2746 return;
2747
2748 trunc:
2749 printf(" [|BGP]");
2750 }
2751
2752 /*
2753 * Local Variables:
2754 * c-style: whitesmith
2755 * c-basic-offset: 4
2756 * End:
2757 */
Tomato firmware and modifications.