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[tcpdump] / print-bgp.c
1 /*
2 * Copyright (C) 1999 WIDE Project.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * Extensively modified by Hannes Gredler (hannes@juniper.net) for more
30 * complete BGP support.
31 */
32
33 #ifdef HAVE_CONFIG_H
34 #include "config.h"
35 #endif
36
37 #ifndef lint
38 static const char rcsid[] _U_ =
39 "@(#) $Header: /tcpdump/master/tcpdump/print-bgp.c,v 1.114 2007-07-14 22:24:54 guy Exp $";
40 #endif
41
42 #include <tcpdump-stdinc.h>
43
44 #include <stdio.h>
45 #include <string.h>
46
47 #include "interface.h"
48 #include "decode_prefix.h"
49 #include "addrtoname.h"
50 #include "extract.h"
51 #include "bgp.h"
52 #include "af.h"
53 #include "l2vpn.h"
54
55 struct bgp {
56 u_int8_t bgp_marker[16];
57 u_int16_t bgp_len;
58 u_int8_t bgp_type;
59 };
60 #define BGP_SIZE 19 /* unaligned */
61
62 #define BGP_OPEN 1
63 #define BGP_UPDATE 2
64 #define BGP_NOTIFICATION 3
65 #define BGP_KEEPALIVE 4
66 #define BGP_ROUTE_REFRESH 5
67
68 static struct tok bgp_msg_values[] = {
69 { BGP_OPEN, "Open"},
70 { BGP_UPDATE, "Update"},
71 { BGP_NOTIFICATION, "Notification"},
72 { BGP_KEEPALIVE, "Keepalive"},
73 { BGP_ROUTE_REFRESH, "Route Refresh"},
74 { 0, NULL}
75 };
76
77 struct bgp_open {
78 u_int8_t bgpo_marker[16];
79 u_int16_t bgpo_len;
80 u_int8_t bgpo_type;
81 u_int8_t bgpo_version;
82 u_int16_t bgpo_myas;
83 u_int16_t bgpo_holdtime;
84 u_int32_t bgpo_id;
85 u_int8_t bgpo_optlen;
86 /* options should follow */
87 };
88 #define BGP_OPEN_SIZE 29 /* unaligned */
89
90 struct bgp_opt {
91 u_int8_t bgpopt_type;
92 u_int8_t bgpopt_len;
93 /* variable length */
94 };
95 #define BGP_OPT_SIZE 2 /* some compilers may pad to 4 bytes */
96
97 #define BGP_UPDATE_MINSIZE 23
98
99 struct bgp_notification {
100 u_int8_t bgpn_marker[16];
101 u_int16_t bgpn_len;
102 u_int8_t bgpn_type;
103 u_int8_t bgpn_major;
104 u_int8_t bgpn_minor;
105 };
106 #define BGP_NOTIFICATION_SIZE 21 /* unaligned */
107
108 struct bgp_route_refresh {
109 u_int8_t bgp_marker[16];
110 u_int16_t len;
111 u_int8_t type;
112 u_int8_t afi[2]; /* the compiler messes this structure up */
113 u_int8_t res; /* when doing misaligned sequences of int8 and int16 */
114 u_int8_t safi; /* afi should be int16 - so we have to access it using */
115 }; /* EXTRACT_16BITS(&bgp_route_refresh->afi) (sigh) */
116 #define BGP_ROUTE_REFRESH_SIZE 23
117
118 struct bgp_attr {
119 u_int8_t bgpa_flags;
120 u_int8_t bgpa_type;
121 union {
122 u_int8_t len;
123 u_int16_t elen;
124 } bgpa_len;
125 #define bgp_attr_len(p) \
126 (((p)->bgpa_flags & 0x10) ? \
127 EXTRACT_16BITS(&(p)->bgpa_len.elen) : (p)->bgpa_len.len)
128 #define bgp_attr_off(p) \
129 (((p)->bgpa_flags & 0x10) ? 4 : 3)
130 };
131
132 #define BGPTYPE_ORIGIN 1
133 #define BGPTYPE_AS_PATH 2
134 #define BGPTYPE_NEXT_HOP 3
135 #define BGPTYPE_MULTI_EXIT_DISC 4
136 #define BGPTYPE_LOCAL_PREF 5
137 #define BGPTYPE_ATOMIC_AGGREGATE 6
138 #define BGPTYPE_AGGREGATOR 7
139 #define BGPTYPE_COMMUNITIES 8 /* RFC1997 */
140 #define BGPTYPE_ORIGINATOR_ID 9 /* RFC1998 */
141 #define BGPTYPE_CLUSTER_LIST 10 /* RFC1998 */
142 #define BGPTYPE_DPA 11 /* draft-ietf-idr-bgp-dpa */
143 #define BGPTYPE_ADVERTISERS 12 /* RFC1863 */
144 #define BGPTYPE_RCID_PATH 13 /* RFC1863 */
145 #define BGPTYPE_MP_REACH_NLRI 14 /* RFC2283 */
146 #define BGPTYPE_MP_UNREACH_NLRI 15 /* RFC2283 */
147 #define BGPTYPE_EXTD_COMMUNITIES 16 /* draft-ietf-idr-bgp-ext-communities */
148 #define BGPTYPE_PMSI_TUNNEL 22 /* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */
149 #define BGPTYPE_ATTR_SET 128 /* draft-marques-ppvpn-ibgp */
150
151 #define BGP_MP_NLRI_MINSIZE 3 /* End of RIB Marker detection */
152
153 static struct tok bgp_attr_values[] = {
154 { BGPTYPE_ORIGIN, "Origin"},
155 { BGPTYPE_AS_PATH, "AS Path"},
156 { BGPTYPE_NEXT_HOP, "Next Hop"},
157 { BGPTYPE_MULTI_EXIT_DISC, "Multi Exit Discriminator"},
158 { BGPTYPE_LOCAL_PREF, "Local Preference"},
159 { BGPTYPE_ATOMIC_AGGREGATE, "Atomic Aggregate"},
160 { BGPTYPE_AGGREGATOR, "Aggregator"},
161 { BGPTYPE_COMMUNITIES, "Community"},
162 { BGPTYPE_ORIGINATOR_ID, "Originator ID"},
163 { BGPTYPE_CLUSTER_LIST, "Cluster List"},
164 { BGPTYPE_DPA, "DPA"},
165 { BGPTYPE_ADVERTISERS, "Advertisers"},
166 { BGPTYPE_RCID_PATH, "RCID Path / Cluster ID"},
167 { BGPTYPE_MP_REACH_NLRI, "Multi-Protocol Reach NLRI"},
168 { BGPTYPE_MP_UNREACH_NLRI, "Multi-Protocol Unreach NLRI"},
169 { BGPTYPE_EXTD_COMMUNITIES, "Extended Community"},
170 { BGPTYPE_PMSI_TUNNEL, "PMSI Tunnel"},
171 { BGPTYPE_ATTR_SET, "Attribute Set"},
172 { 255, "Reserved for development"},
173 { 0, NULL}
174 };
175
176 #define BGP_AS_SET 1
177 #define BGP_AS_SEQUENCE 2
178 #define BGP_CONFED_AS_SEQUENCE 3 /* draft-ietf-idr-rfc3065bis-01 */
179 #define BGP_CONFED_AS_SET 4 /* draft-ietf-idr-rfc3065bis-01 */
180
181 static struct tok bgp_as_path_segment_open_values[] = {
182 { BGP_AS_SEQUENCE, ""},
183 { BGP_AS_SET, "{ "},
184 { BGP_CONFED_AS_SEQUENCE, "( "},
185 { BGP_CONFED_AS_SET, "({ "},
186 { 0, NULL}
187 };
188
189 static struct tok bgp_as_path_segment_close_values[] = {
190 { BGP_AS_SEQUENCE, ""},
191 { BGP_AS_SET, "}"},
192 { BGP_CONFED_AS_SEQUENCE, ")"},
193 { BGP_CONFED_AS_SET, "})"},
194 { 0, NULL}
195 };
196
197 #define BGP_OPT_AUTH 1
198 #define BGP_OPT_CAP 2
199
200
201 static struct tok bgp_opt_values[] = {
202 { BGP_OPT_AUTH, "Authentication Information"},
203 { BGP_OPT_CAP, "Capabilities Advertisement"},
204 { 0, NULL}
205 };
206
207 #define BGP_CAPCODE_MP 1
208 #define BGP_CAPCODE_RR 2
209 #define BGP_CAPCODE_ORF 3 /* XXX */
210 #define BGP_CAPCODE_RESTART 64 /* draft-ietf-idr-restart-05 */
211 #define BGP_CAPCODE_AS_NEW 65 /* XXX */
212 #define BGP_CAPCODE_DYN_CAP 67 /* XXX */
213 #define BGP_CAPCODE_RR_CISCO 128
214
215 static struct tok bgp_capcode_values[] = {
216 { BGP_CAPCODE_MP, "Multiprotocol Extensions"},
217 { BGP_CAPCODE_RR, "Route Refresh"},
218 { BGP_CAPCODE_ORF, "Cooperative Route Filtering"},
219 { BGP_CAPCODE_RESTART, "Graceful Restart"},
220 { BGP_CAPCODE_AS_NEW, "32-Bit AS Number"},
221 { BGP_CAPCODE_DYN_CAP, "Dynamic Capability"},
222 { BGP_CAPCODE_RR_CISCO, "Route Refresh (Cisco)"},
223 { 0, NULL}
224 };
225
226 #define BGP_NOTIFY_MAJOR_MSG 1
227 #define BGP_NOTIFY_MAJOR_OPEN 2
228 #define BGP_NOTIFY_MAJOR_UPDATE 3
229 #define BGP_NOTIFY_MAJOR_HOLDTIME 4
230 #define BGP_NOTIFY_MAJOR_FSM 5
231 #define BGP_NOTIFY_MAJOR_CEASE 6
232 #define BGP_NOTIFY_MAJOR_CAP 7
233
234 static struct tok bgp_notify_major_values[] = {
235 { BGP_NOTIFY_MAJOR_MSG, "Message Header Error"},
236 { BGP_NOTIFY_MAJOR_OPEN, "OPEN Message Error"},
237 { BGP_NOTIFY_MAJOR_UPDATE, "UPDATE Message Error"},
238 { BGP_NOTIFY_MAJOR_HOLDTIME,"Hold Timer Expired"},
239 { BGP_NOTIFY_MAJOR_FSM, "Finite State Machine Error"},
240 { BGP_NOTIFY_MAJOR_CEASE, "Cease"},
241 { BGP_NOTIFY_MAJOR_CAP, "Capability Message Error"},
242 { 0, NULL}
243 };
244
245 /* draft-ietf-idr-cease-subcode-02 */
246 #define BGP_NOTIFY_MINOR_CEASE_MAXPRFX 1
247 static struct tok bgp_notify_minor_cease_values[] = {
248 { BGP_NOTIFY_MINOR_CEASE_MAXPRFX, "Maximum Number of Prefixes Reached"},
249 { 2, "Administratively Shutdown"},
250 { 3, "Peer Unconfigured"},
251 { 4, "Administratively Reset"},
252 { 5, "Connection Rejected"},
253 { 6, "Other Configuration Change"},
254 { 7, "Connection Collision Resolution"},
255 { 0, NULL}
256 };
257
258 static struct tok bgp_notify_minor_msg_values[] = {
259 { 1, "Connection Not Synchronized"},
260 { 2, "Bad Message Length"},
261 { 3, "Bad Message Type"},
262 { 0, NULL}
263 };
264
265 static struct tok bgp_notify_minor_open_values[] = {
266 { 1, "Unsupported Version Number"},
267 { 2, "Bad Peer AS"},
268 { 3, "Bad BGP Identifier"},
269 { 4, "Unsupported Optional Parameter"},
270 { 5, "Authentication Failure"},
271 { 6, "Unacceptable Hold Time"},
272 { 7, "Capability Message Error"},
273 { 0, NULL}
274 };
275
276 static struct tok bgp_notify_minor_update_values[] = {
277 { 1, "Malformed Attribute List"},
278 { 2, "Unrecognized Well-known Attribute"},
279 { 3, "Missing Well-known Attribute"},
280 { 4, "Attribute Flags Error"},
281 { 5, "Attribute Length Error"},
282 { 6, "Invalid ORIGIN Attribute"},
283 { 7, "AS Routing Loop"},
284 { 8, "Invalid NEXT_HOP Attribute"},
285 { 9, "Optional Attribute Error"},
286 { 10, "Invalid Network Field"},
287 { 11, "Malformed AS_PATH"},
288 { 0, NULL}
289 };
290
291 static struct tok bgp_notify_minor_cap_values[] = {
292 { 1, "Invalid Action Value" },
293 { 2, "Invalid Capability Length" },
294 { 3, "Malformed Capability Value" },
295 { 4, "Unsupported Capability Code" },
296 { 0, NULL }
297 };
298
299 static struct tok bgp_origin_values[] = {
300 { 0, "IGP"},
301 { 1, "EGP"},
302 { 2, "Incomplete"},
303 { 0, NULL}
304 };
305
306 #define BGP_PMSI_TUNNEL_RSVP_P2MP 1
307 #define BGP_PMSI_TUNNEL_LDP_P2MP 2
308 #define BGP_PMSI_TUNNEL_PIM_SSM 3
309 #define BGP_PMSI_TUNNEL_PIM_SM 4
310 #define BGP_PMSI_TUNNEL_PIM_BIDIR 5
311 #define BGP_PMSI_TUNNEL_INGRESS 6
312 #define BGP_PMSI_TUNNEL_LDP_MP2MP 7
313
314 static struct tok bgp_pmsi_tunnel_values[] = {
315 { BGP_PMSI_TUNNEL_RSVP_P2MP, "RSVP-TE P2MP LSP"},
316 { BGP_PMSI_TUNNEL_LDP_P2MP, "LDP P2MP LSP"},
317 { BGP_PMSI_TUNNEL_PIM_SSM, "PIM-SSM Tree"},
318 { BGP_PMSI_TUNNEL_PIM_SM, "PIM-SM Tree"},
319 { BGP_PMSI_TUNNEL_PIM_BIDIR, "PIM-Bidir Tree"},
320 { BGP_PMSI_TUNNEL_INGRESS, "Ingress Replication"},
321 { BGP_PMSI_TUNNEL_LDP_MP2MP, "LDP MP2MP LSP"},
322 { 0, NULL}
323 };
324
325 static struct tok bgp_pmsi_flag_values[] = {
326 { 0x01, "Leaf Information required"},
327 { 0, NULL}
328 };
329
330
331 /* Subsequent address family identifier, RFC2283 section 7 */
332 #define SAFNUM_RES 0
333 #define SAFNUM_UNICAST 1
334 #define SAFNUM_MULTICAST 2
335 #define SAFNUM_UNIMULTICAST 3
336 /* labeled BGP RFC3107 */
337 #define SAFNUM_LABUNICAST 4
338 /* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */
339 #define SAFNUM_MULTICAST_VPN 5
340 #define SAFNUM_TUNNEL 64 /* XXX */
341 #define SAFNUM_VPLS 65 /* XXX */
342 #define SAFNUM_MDT 66 /* XXX */
343 /* Section 4.3.4 of draft-rosen-rfc2547bis-03.txt */
344 #define SAFNUM_VPNUNICAST 128
345 #define SAFNUM_VPNMULTICAST 129
346 #define SAFNUM_VPNUNIMULTICAST 130
347 /* draft-marques-ppvpn-rt-constrain-01.txt */
348 #define SAFNUM_RT_ROUTING_INFO 132
349
350 #define BGP_VPN_RD_LEN 8
351
352 static struct tok bgp_safi_values[] = {
353 { SAFNUM_RES, "Reserved"},
354 { SAFNUM_UNICAST, "Unicast"},
355 { SAFNUM_MULTICAST, "Multicast"},
356 { SAFNUM_UNIMULTICAST, "Unicast+Multicast"},
357 { SAFNUM_LABUNICAST, "labeled Unicast"},
358 { SAFNUM_TUNNEL, "Tunnel"},
359 { SAFNUM_VPLS, "VPLS"},
360 { SAFNUM_MDT, "MDT"},
361 { SAFNUM_VPNUNICAST, "labeled VPN Unicast"},
362 { SAFNUM_VPNMULTICAST, "labeled VPN Multicast"},
363 { SAFNUM_VPNUNIMULTICAST, "labeled VPN Unicast+Multicast"},
364 { SAFNUM_RT_ROUTING_INFO, "Route Target Routing Information"},
365 { SAFNUM_MULTICAST_VPN, "Multicast VPN"},
366 { 0, NULL }
367 };
368
369 /* well-known community */
370 #define BGP_COMMUNITY_NO_EXPORT 0xffffff01
371 #define BGP_COMMUNITY_NO_ADVERT 0xffffff02
372 #define BGP_COMMUNITY_NO_EXPORT_SUBCONFED 0xffffff03
373
374 /* Extended community type - draft-ietf-idr-bgp-ext-communities-05 */
375 #define BGP_EXT_COM_RT_0 0x0002 /* Route Target,Format AS(2bytes):AN(4bytes) */
376 #define BGP_EXT_COM_RT_1 0x0102 /* Route Target,Format IP address:AN(2bytes) */
377 #define BGP_EXT_COM_RT_2 0x0202 /* Route Target,Format AN(4bytes):local(2bytes) */
378 #define BGP_EXT_COM_RO_0 0x0003 /* Route Origin,Format AS(2bytes):AN(4bytes) */
379 #define BGP_EXT_COM_RO_1 0x0103 /* Route Origin,Format IP address:AN(2bytes) */
380 #define BGP_EXT_COM_RO_2 0x0203 /* Route Origin,Format AN(4bytes):local(2bytes) */
381 #define BGP_EXT_COM_LINKBAND 0x4004 /* Link Bandwidth,Format AS(2B):Bandwidth(4B) */
382 /* rfc2547 bgp-mpls-vpns */
383 #define BGP_EXT_COM_VPN_ORIGIN 0x0005 /* OSPF Domain ID / VPN of Origin - draft-rosen-vpns-ospf-bgp-mpls */
384 #define BGP_EXT_COM_VPN_ORIGIN2 0x0105 /* duplicate - keep for backwards compatability */
385 #define BGP_EXT_COM_VPN_ORIGIN3 0x0205 /* duplicate - keep for backwards compatability */
386 #define BGP_EXT_COM_VPN_ORIGIN4 0x8005 /* duplicate - keep for backwards compatability */
387
388 #define BGP_EXT_COM_OSPF_RTYPE 0x0306 /* OSPF Route Type,Format Area(4B):RouteType(1B):Options(1B) */
389 #define BGP_EXT_COM_OSPF_RTYPE2 0x8000 /* duplicate - keep for backwards compatability */
390
391 #define BGP_EXT_COM_OSPF_RID 0x0107 /* OSPF Router ID,Format RouterID(4B):Unused(2B) */
392 #define BGP_EXT_COM_OSPF_RID2 0x8001 /* duplicate - keep for backwards compatability */
393
394 #define BGP_EXT_COM_L2INFO 0x800a /* draft-kompella-ppvpn-l2vpn */
395
396 #define BGP_EXT_COM_SOURCE_AS 0x0009 /* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */
397 #define BGP_EXT_COM_VRF_RT_IMP 0x010a /* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */
398
399 /* http://www.cisco.com/en/US/tech/tk436/tk428/technologies_tech_note09186a00801eb09a.shtml */
400 #define BGP_EXT_COM_EIGRP_GEN 0x8800
401 #define BGP_EXT_COM_EIGRP_METRIC_AS_DELAY 0x8801
402 #define BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW 0x8802
403 #define BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU 0x8803
404 #define BGP_EXT_COM_EIGRP_EXT_REMAS_REMID 0x8804
405 #define BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC 0x8805
406
407 static struct tok bgp_extd_comm_flag_values[] = {
408 { 0x8000, "vendor-specific"},
409 { 0x4000, "non-transitive"},
410 { 0, NULL},
411 };
412
413 static struct tok bgp_extd_comm_subtype_values[] = {
414 { BGP_EXT_COM_RT_0, "target"},
415 { BGP_EXT_COM_RT_1, "target"},
416 { BGP_EXT_COM_RT_2, "target"},
417 { BGP_EXT_COM_RO_0, "origin"},
418 { BGP_EXT_COM_RO_1, "origin"},
419 { BGP_EXT_COM_RO_2, "origin"},
420 { BGP_EXT_COM_LINKBAND, "link-BW"},
421 { BGP_EXT_COM_VPN_ORIGIN, "ospf-domain"},
422 { BGP_EXT_COM_VPN_ORIGIN2, "ospf-domain"},
423 { BGP_EXT_COM_VPN_ORIGIN3, "ospf-domain"},
424 { BGP_EXT_COM_VPN_ORIGIN4, "ospf-domain"},
425 { BGP_EXT_COM_OSPF_RTYPE, "ospf-route-type"},
426 { BGP_EXT_COM_OSPF_RTYPE2, "ospf-route-type"},
427 { BGP_EXT_COM_OSPF_RID, "ospf-router-id"},
428 { BGP_EXT_COM_OSPF_RID2, "ospf-router-id"},
429 { BGP_EXT_COM_L2INFO, "layer2-info"},
430 { BGP_EXT_COM_EIGRP_GEN , "eigrp-general-route (flag, tag)" },
431 { BGP_EXT_COM_EIGRP_METRIC_AS_DELAY , "eigrp-route-metric (AS, delay)" },
432 { BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW , "eigrp-route-metric (reliability, nexthop, bandwidth)" },
433 { BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU , "eigrp-route-metric (load, MTU)" },
434 { BGP_EXT_COM_EIGRP_EXT_REMAS_REMID , "eigrp-external-route (remote-AS, remote-ID)" },
435 { BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC , "eigrp-external-route (remote-proto, remote-metric)" },
436 { BGP_EXT_COM_SOURCE_AS, "source-AS" },
437 { BGP_EXT_COM_VRF_RT_IMP, "vrf-route-import"},
438 { 0, NULL},
439 };
440
441 /* OSPF codes for BGP_EXT_COM_OSPF_RTYPE draft-rosen-vpns-ospf-bgp-mpls */
442 #define BGP_OSPF_RTYPE_RTR 1 /* OSPF Router LSA */
443 #define BGP_OSPF_RTYPE_NET 2 /* OSPF Network LSA */
444 #define BGP_OSPF_RTYPE_SUM 3 /* OSPF Summary LSA */
445 #define BGP_OSPF_RTYPE_EXT 5 /* OSPF External LSA, note that ASBR doesn't apply to MPLS-VPN */
446 #define BGP_OSPF_RTYPE_NSSA 7 /* OSPF NSSA External*/
447 #define BGP_OSPF_RTYPE_SHAM 129 /* OSPF-MPLS-VPN Sham link */
448 #define BGP_OSPF_RTYPE_METRIC_TYPE 0x1 /* LSB of RTYPE Options Field */
449
450 static struct tok bgp_extd_comm_ospf_rtype_values[] = {
451 { BGP_OSPF_RTYPE_RTR, "Router" },
452 { BGP_OSPF_RTYPE_NET, "Network" },
453 { BGP_OSPF_RTYPE_SUM, "Summary" },
454 { BGP_OSPF_RTYPE_EXT, "External" },
455 { BGP_OSPF_RTYPE_NSSA,"NSSA External" },
456 { BGP_OSPF_RTYPE_SHAM,"MPLS-VPN Sham" },
457 { 0, NULL },
458 };
459
460 int
461 decode_prefix4(const u_char *pptr, char *buf, u_int buflen)
462 {
463 struct in_addr addr;
464 u_int plen;
465
466 TCHECK(pptr[0]);
467 plen = pptr[0];
468 if (32 < plen)
469 return -1;
470
471 memset(&addr, 0, sizeof(addr));
472 TCHECK2(pptr[1], (plen + 7) / 8);
473 memcpy(&addr, &pptr[1], (plen + 7) / 8);
474 if (plen % 8) {
475 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
476 ((0xff00 >> (plen % 8)) & 0xff);
477 }
478 snprintf(buf, buflen, "%s/%d", getname((u_char *)&addr), plen);
479 return 1 + (plen + 7) / 8;
480
481 trunc:
482 return -2;
483 }
484
485 static int
486 decode_labeled_prefix4(const u_char *pptr, char *buf, u_int buflen)
487 {
488 struct in_addr addr;
489 u_int plen;
490
491 TCHECK(pptr[0]);
492 plen = pptr[0]; /* get prefix length */
493
494 /* this is one of the weirdnesses of rfc3107
495 the label length (actually the label + COS bits)
496 is added to the prefix length;
497 we also do only read out just one label -
498 there is no real application for advertisement of
499 stacked labels in a a single BGP message
500 */
501
502 if (24 > plen)
503 return -1;
504
505 plen-=24; /* adjust prefixlen - labellength */
506
507 if (32 < plen)
508 return -1;
509
510 memset(&addr, 0, sizeof(addr));
511 TCHECK2(pptr[4], (plen + 7) / 8);
512 memcpy(&addr, &pptr[4], (plen + 7) / 8);
513 if (plen % 8) {
514 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
515 ((0xff00 >> (plen % 8)) & 0xff);
516 }
517 /* the label may get offsetted by 4 bits so lets shift it right */
518 snprintf(buf, buflen, "%s/%d, label:%u %s",
519 getname((u_char *)&addr),
520 plen,
521 EXTRACT_24BITS(pptr+1)>>4,
522 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
523
524 return 4 + (plen + 7) / 8;
525
526 trunc:
527 return -2;
528 }
529
530 /*
531 * bgp_vpn_ip_print
532 *
533 * print an ipv4 or ipv6 address into a buffer dependend on address length.
534 */
535 static char *
536 bgp_vpn_ip_print (const u_char *pptr, u_int addr_length) {
537
538 /* worst case string is s fully formatted v6 address */
539 static char addr[sizeof("1234:5678:89ab:cdef:1234:5678:89ab:cdef")];
540 char *pos = addr;
541
542 switch(addr_length) {
543 case (sizeof(struct in_addr) << 3): /* 32 */
544 TCHECK2(pptr[0], sizeof(struct in_addr));
545 snprintf(pos, sizeof(addr), "%s", ipaddr_string(pptr));
546 break;
547 case (sizeof(struct in6_addr) << 3): /* 128 */
548 TCHECK2(pptr[0], sizeof(struct in6_addr));
549 snprintf(pos, sizeof(addr), "%s", ip6addr_string(pptr));
550 break;
551 default:
552 snprintf(pos, sizeof(addr), "bogus address length %u", addr_length);
553 break;
554 }
555 pos += strlen(pos);
556
557 trunc:
558 *(pos) = '\0';
559 return (addr);
560 }
561
562 /*
563 * bgp_vpn_sg_print
564 *
565 * print an multicast s,g entry into a buffer.
566 * the s,g entry is encoded like this.
567 *
568 * +-----------------------------------+
569 * | Multicast Source Length (1 octet) |
570 * +-----------------------------------+
571 * | Multicast Source (Variable) |
572 * +-----------------------------------+
573 * | Multicast Group Length (1 octet) |
574 * +-----------------------------------+
575 * | Multicast Group (Variable) |
576 * +-----------------------------------+
577 *
578 * return the number of bytes read from the wire.
579 */
580 static int
581 bgp_vpn_sg_print (const u_char *pptr, char *buf, u_int buflen) {
582
583 u_int8_t addr_length;
584 u_int total_length, offset;
585
586 total_length = 0;
587
588 /* Source address length, encoded in bits */
589 TCHECK2(pptr[0], 1);
590 addr_length = *pptr++;
591
592 /* Source address */
593 TCHECK2(pptr[0], (addr_length >> 3));
594 total_length += (addr_length >> 3) + 1;
595 offset = strlen(buf);
596 if (addr_length) {
597 snprintf(buf + offset, buflen - offset, ", Source %s",
598 bgp_vpn_ip_print(pptr, addr_length));
599 pptr += (addr_length >> 3);
600 }
601
602 /* Group address length, encoded in bits */
603 TCHECK2(pptr[0], 1);
604 addr_length = *pptr++;
605
606 /* Group address */
607 TCHECK2(pptr[0], (addr_length >> 3));
608 total_length += (addr_length >> 3) + 1;
609 offset = strlen(buf);
610 if (addr_length) {
611 snprintf(buf + offset, buflen - offset, ", Group %s",
612 bgp_vpn_ip_print(pptr, addr_length));
613 pptr += (addr_length >> 3);
614 }
615
616 trunc:
617 return (total_length);
618 }
619
620
621 /* RDs and RTs share the same semantics
622 * we use bgp_vpn_rd_print for
623 * printing route targets inside a NLRI */
624 char *
625 bgp_vpn_rd_print (const u_char *pptr) {
626
627 /* allocate space for the largest possible string */
628 static char rd[sizeof("xxxxxxxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")];
629 char *pos = rd;
630
631 /* ok lets load the RD format */
632 switch (EXTRACT_16BITS(pptr)) {
633
634 /* AS:IP-address fmt*/
635 case 0:
636 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u.%u.%u.%u",
637 EXTRACT_16BITS(pptr+2), *(pptr+4), *(pptr+5), *(pptr+6), *(pptr+7));
638 break;
639 /* IP-address:AS fmt*/
640
641 case 1:
642 snprintf(pos, sizeof(rd) - (pos - rd), "%u.%u.%u.%u:%u",
643 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
644 break;
645
646 /* 4-byte-AS:number fmt*/
647 case 2:
648 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u (%u.%u.%u.%u:%u)",
649 EXTRACT_32BITS(pptr+2), EXTRACT_16BITS(pptr+6),
650 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
651 break;
652 default:
653 snprintf(pos, sizeof(rd) - (pos - rd), "unknown RD format");
654 break;
655 }
656 pos += strlen(pos);
657 *(pos) = '\0';
658 return (rd);
659 }
660
661 static int
662 decode_rt_routing_info(const u_char *pptr, char *buf, u_int buflen)
663 {
664 u_int8_t route_target[8];
665 u_int plen;
666
667 TCHECK(pptr[0]);
668 plen = pptr[0]; /* get prefix length */
669
670 if (0 == plen)
671 return 1; /* default route target */
672
673 if (32 > plen)
674 return -1;
675
676 plen-=32; /* adjust prefix length */
677
678 if (64 < plen)
679 return -1;
680
681 memset(&route_target, 0, sizeof(route_target));
682 TCHECK2(pptr[1], (plen + 7) / 8);
683 memcpy(&route_target, &pptr[1], (plen + 7) / 8);
684 if (plen % 8) {
685 ((u_char *)&route_target)[(plen + 7) / 8 - 1] &=
686 ((0xff00 >> (plen % 8)) & 0xff);
687 }
688 snprintf(buf, buflen, "origin AS: %u, route target %s",
689 EXTRACT_32BITS(pptr+1),
690 bgp_vpn_rd_print((u_char *)&route_target));
691
692 return 5 + (plen + 7) / 8;
693
694 trunc:
695 return -2;
696 }
697
698 static int
699 decode_labeled_vpn_prefix4(const u_char *pptr, char *buf, u_int buflen)
700 {
701 struct in_addr addr;
702 u_int plen;
703
704 TCHECK(pptr[0]);
705 plen = pptr[0]; /* get prefix length */
706
707 if ((24+64) > plen)
708 return -1;
709
710 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
711
712 if (32 < plen)
713 return -1;
714
715 memset(&addr, 0, sizeof(addr));
716 TCHECK2(pptr[12], (plen + 7) / 8);
717 memcpy(&addr, &pptr[12], (plen + 7) / 8);
718 if (plen % 8) {
719 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
720 ((0xff00 >> (plen % 8)) & 0xff);
721 }
722 /* the label may get offsetted by 4 bits so lets shift it right */
723 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
724 bgp_vpn_rd_print(pptr+4),
725 getname((u_char *)&addr),
726 plen,
727 EXTRACT_24BITS(pptr+1)>>4,
728 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
729
730 return 12 + (plen + 7) / 8;
731
732 trunc:
733 return -2;
734 }
735
736 #define BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI 1
737 #define BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI 2
738 #define BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI 3
739 #define BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF 4
740 #define BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE 5
741 #define BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN 6
742 #define BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN 7
743
744 static struct tok bgp_multicast_vpn_route_type_values[] = {
745 { BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI, "Intra-AS I-PMSI"},
746 { BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI, "Inter-AS I-PMSI"},
747 { BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI, "S-PMSI"},
748 { BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF, "Intra-AS Segment-Leaf"},
749 { BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE, "Source-Active"},
750 { BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN, "Shared Tree Join"},
751 { BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN, "Source Tree Join"},
752 };
753
754 static int
755 decode_multicast_vpn(const u_char *pptr, char *buf, u_int buflen)
756 {
757 u_int8_t route_type, route_length, addr_length, sg_length;
758 u_int offset;
759
760 TCHECK2(pptr[0], 2);
761 route_type = *pptr++;
762 route_length = *pptr++;
763
764 snprintf(buf, buflen, "Route-Type: %s (%u), length: %u",
765 tok2str(bgp_multicast_vpn_route_type_values,
766 "Unknown", route_type),
767 route_type, route_length);
768
769 switch(route_type) {
770 case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI:
771 TCHECK2(pptr[0], BGP_VPN_RD_LEN);
772 offset = strlen(buf);
773 snprintf(buf + offset, buflen - offset, ", RD: %s, Originator %s",
774 bgp_vpn_rd_print(pptr),
775 bgp_vpn_ip_print(pptr + BGP_VPN_RD_LEN,
776 (route_length - BGP_VPN_RD_LEN) << 3));
777 break;
778 case BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI:
779 TCHECK2(pptr[0], BGP_VPN_RD_LEN + 4);
780 offset = strlen(buf);
781 snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %u",
782 bgp_vpn_rd_print(pptr),
783 EXTRACT_32BITS(pptr + BGP_VPN_RD_LEN));
784 break;
785
786 case BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI:
787 TCHECK2(pptr[0], BGP_VPN_RD_LEN);
788 offset = strlen(buf);
789 snprintf(buf + offset, buflen - offset, ", RD: %s",
790 bgp_vpn_rd_print(pptr));
791 pptr += BGP_VPN_RD_LEN;
792
793 sg_length = bgp_vpn_sg_print(pptr, buf, buflen);
794 addr_length = route_length - sg_length;
795
796 TCHECK2(pptr[0], addr_length);
797 offset = strlen(buf);
798 snprintf(buf + offset, buflen - offset, ", Originator %s",
799 bgp_vpn_ip_print(pptr, addr_length << 3));
800 break;
801
802 case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE:
803 TCHECK2(pptr[0], BGP_VPN_RD_LEN);
804 offset = strlen(buf);
805 snprintf(buf + offset, buflen - offset, ", RD: %s",
806 bgp_vpn_rd_print(pptr));
807 pptr += BGP_VPN_RD_LEN;
808
809 bgp_vpn_sg_print(pptr, buf, buflen);
810 break;
811
812 case BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN: /* fall through */
813 case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN:
814 TCHECK2(pptr[0], BGP_VPN_RD_LEN);
815 offset = strlen(buf);
816 snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %u",
817 bgp_vpn_rd_print(pptr),
818 EXTRACT_32BITS(pptr + BGP_VPN_RD_LEN));
819 pptr += BGP_VPN_RD_LEN;
820
821 bgp_vpn_sg_print(pptr, buf, buflen);
822 break;
823
824 /*
825 * no per route-type printing yet.
826 */
827 case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF:
828 default:
829 break;
830 }
831
832 return route_length + 2;
833
834 trunc:
835 return -2;
836 }
837
838 /*
839 * As I remember, some versions of systems have an snprintf() that
840 * returns -1 if the buffer would have overflowed. If the return
841 * value is negative, set buflen to 0, to indicate that we've filled
842 * the buffer up.
843 *
844 * If the return value is greater than buflen, that means that
845 * the buffer would have overflowed; again, set buflen to 0 in
846 * that case.
847 */
848 #define UPDATE_BUF_BUFLEN(buf, buflen, strlen) \
849 if (strlen<0) \
850 buflen=0; \
851 else if ((u_int)strlen>buflen) \
852 buflen=0; \
853 else { \
854 buflen-=strlen; \
855 buf+=strlen; \
856 }
857
858 static int
859 decode_labeled_vpn_l2(const u_char *pptr, char *buf, u_int buflen)
860 {
861 int plen,tlen,strlen,tlv_type,tlv_len,ttlv_len;
862
863 TCHECK2(pptr[0], 2);
864 plen=EXTRACT_16BITS(pptr);
865 tlen=plen;
866 pptr+=2;
867 TCHECK2(pptr[0],15);
868 buf[0]='\0';
869 strlen=snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u",
870 bgp_vpn_rd_print(pptr),
871 EXTRACT_16BITS(pptr+8),
872 EXTRACT_16BITS(pptr+10),
873 EXTRACT_24BITS(pptr+12)>>4); /* the label is offsetted by 4 bits so lets shift it right */
874 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
875 pptr+=15;
876 tlen-=15;
877
878 /* ok now the variable part - lets read out TLVs*/
879 while (tlen>0) {
880 if (tlen < 3)
881 return -1;
882 TCHECK2(pptr[0], 3);
883 tlv_type=*pptr++;
884 tlv_len=EXTRACT_16BITS(pptr);
885 ttlv_len=tlv_len;
886 pptr+=2;
887
888 switch(tlv_type) {
889 case 1:
890 if (buflen!=0) {
891 strlen=snprintf(buf,buflen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
892 tlv_type,
893 tlv_len);
894 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
895 }
896 ttlv_len=ttlv_len/8+1; /* how many bytes do we need to read ? */
897 while (ttlv_len>0) {
898 TCHECK(pptr[0]);
899 if (buflen!=0) {
900 strlen=snprintf(buf,buflen, "%02x",*pptr++);
901 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
902 }
903 ttlv_len--;
904 }
905 break;
906 default:
907 if (buflen!=0) {
908 strlen=snprintf(buf,buflen, "\n\t\tunknown TLV #%u, length: %u",
909 tlv_type,
910 tlv_len);
911 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
912 }
913 break;
914 }
915 tlen-=(tlv_len<<3); /* the tlv-length is expressed in bits so lets shift it right */
916 }
917 return plen+2;
918
919 trunc:
920 return -2;
921 }
922
923 #ifdef INET6
924 int
925 decode_prefix6(const u_char *pd, char *buf, u_int buflen)
926 {
927 struct in6_addr addr;
928 u_int plen;
929
930 TCHECK(pd[0]);
931 plen = pd[0];
932 if (128 < plen)
933 return -1;
934
935 memset(&addr, 0, sizeof(addr));
936 TCHECK2(pd[1], (plen + 7) / 8);
937 memcpy(&addr, &pd[1], (plen + 7) / 8);
938 if (plen % 8) {
939 addr.s6_addr[(plen + 7) / 8 - 1] &=
940 ((0xff00 >> (plen % 8)) & 0xff);
941 }
942 snprintf(buf, buflen, "%s/%d", getname6((u_char *)&addr), plen);
943 return 1 + (plen + 7) / 8;
944
945 trunc:
946 return -2;
947 }
948
949 static int
950 decode_labeled_prefix6(const u_char *pptr, char *buf, u_int buflen)
951 {
952 struct in6_addr addr;
953 u_int plen;
954
955 TCHECK(pptr[0]);
956 plen = pptr[0]; /* get prefix length */
957
958 if (24 > plen)
959 return -1;
960
961 plen-=24; /* adjust prefixlen - labellength */
962
963 if (128 < plen)
964 return -1;
965
966 memset(&addr, 0, sizeof(addr));
967 TCHECK2(pptr[4], (plen + 7) / 8);
968 memcpy(&addr, &pptr[4], (plen + 7) / 8);
969 if (plen % 8) {
970 addr.s6_addr[(plen + 7) / 8 - 1] &=
971 ((0xff00 >> (plen % 8)) & 0xff);
972 }
973 /* the label may get offsetted by 4 bits so lets shift it right */
974 snprintf(buf, buflen, "%s/%d, label:%u %s",
975 getname6((u_char *)&addr),
976 plen,
977 EXTRACT_24BITS(pptr+1)>>4,
978 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
979
980 return 4 + (plen + 7) / 8;
981
982 trunc:
983 return -2;
984 }
985
986 static int
987 decode_labeled_vpn_prefix6(const u_char *pptr, char *buf, u_int buflen)
988 {
989 struct in6_addr addr;
990 u_int plen;
991
992 TCHECK(pptr[0]);
993 plen = pptr[0]; /* get prefix length */
994
995 if ((24+64) > plen)
996 return -1;
997
998 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
999
1000 if (128 < plen)
1001 return -1;
1002
1003 memset(&addr, 0, sizeof(addr));
1004 TCHECK2(pptr[12], (plen + 7) / 8);
1005 memcpy(&addr, &pptr[12], (plen + 7) / 8);
1006 if (plen % 8) {
1007 addr.s6_addr[(plen + 7) / 8 - 1] &=
1008 ((0xff00 >> (plen % 8)) & 0xff);
1009 }
1010 /* the label may get offsetted by 4 bits so lets shift it right */
1011 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
1012 bgp_vpn_rd_print(pptr+4),
1013 getname6((u_char *)&addr),
1014 plen,
1015 EXTRACT_24BITS(pptr+1)>>4,
1016 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
1017
1018 return 12 + (plen + 7) / 8;
1019
1020 trunc:
1021 return -2;
1022 }
1023 #endif
1024
1025 static int
1026 decode_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
1027 {
1028 u_int8_t addr[19];
1029 u_int plen;
1030
1031 TCHECK(pptr[0]);
1032 plen = pptr[0]; /* get prefix length */
1033
1034 if (152 < plen)
1035 return -1;
1036
1037 memset(&addr, 0, sizeof(addr));
1038 TCHECK2(pptr[4], (plen + 7) / 8);
1039 memcpy(&addr, &pptr[4], (plen + 7) / 8);
1040 if (plen % 8) {
1041 addr[(plen + 7) / 8 - 1] &=
1042 ((0xff00 >> (plen % 8)) & 0xff);
1043 }
1044 snprintf(buf, buflen, "%s/%d",
1045 isonsap_string(addr,(plen + 7) / 8),
1046 plen);
1047
1048 return 1 + (plen + 7) / 8;
1049
1050 trunc:
1051 return -2;
1052 }
1053
1054 static int
1055 decode_labeled_vpn_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
1056 {
1057 u_int8_t addr[19];
1058 u_int plen;
1059
1060 TCHECK(pptr[0]);
1061 plen = pptr[0]; /* get prefix length */
1062
1063 if ((24+64) > plen)
1064 return -1;
1065
1066 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
1067
1068 if (152 < plen)
1069 return -1;
1070
1071 memset(&addr, 0, sizeof(addr));
1072 TCHECK2(pptr[12], (plen + 7) / 8);
1073 memcpy(&addr, &pptr[12], (plen + 7) / 8);
1074 if (plen % 8) {
1075 addr[(plen + 7) / 8 - 1] &=
1076 ((0xff00 >> (plen % 8)) & 0xff);
1077 }
1078 /* the label may get offsetted by 4 bits so lets shift it right */
1079 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
1080 bgp_vpn_rd_print(pptr+4),
1081 isonsap_string(addr,(plen + 7) / 8),
1082 plen,
1083 EXTRACT_24BITS(pptr+1)>>4,
1084 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
1085
1086 return 12 + (plen + 7) / 8;
1087
1088 trunc:
1089 return -2;
1090 }
1091
1092 static int
1093 bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len)
1094 {
1095 int i;
1096 u_int16_t af;
1097 u_int8_t safi, snpa, nhlen;
1098 union { /* copy buffer for bandwidth values */
1099 float f;
1100 u_int32_t i;
1101 } bw;
1102 int advance;
1103 int tlen;
1104 const u_char *tptr;
1105 char buf[MAXHOSTNAMELEN + 100];
1106 char tokbuf[TOKBUFSIZE];
1107
1108 tptr = pptr;
1109 tlen=len;
1110
1111 switch (attr->bgpa_type) {
1112 case BGPTYPE_ORIGIN:
1113 if (len != 1)
1114 printf("invalid len");
1115 else {
1116 TCHECK(*tptr);
1117 printf("%s", tok2strbuf(bgp_origin_values,
1118 "Unknown Origin Typecode",
1119 tptr[0],
1120 tokbuf, sizeof(tokbuf)));
1121 }
1122 break;
1123
1124 case BGPTYPE_AS_PATH:
1125 if (len % 2) {
1126 printf("invalid len");
1127 break;
1128 }
1129 if (!len) {
1130 printf("empty");
1131 break;
1132 }
1133
1134 while (tptr < pptr + len) {
1135 TCHECK(tptr[0]);
1136 printf("%s", tok2strbuf(bgp_as_path_segment_open_values,
1137 "?", tptr[0],
1138 tokbuf, sizeof(tokbuf)));
1139 for (i = 0; i < tptr[1] * 2; i += 2) {
1140 TCHECK2(tptr[2 + i], 2);
1141 printf("%u ", EXTRACT_16BITS(&tptr[2 + i]));
1142 }
1143 TCHECK(tptr[0]);
1144 printf("%s", tok2strbuf(bgp_as_path_segment_close_values,
1145 "?", tptr[0],
1146 tokbuf, sizeof(tokbuf)));
1147 TCHECK(tptr[1]);
1148 tptr += 2 + tptr[1] * 2;
1149 }
1150 break;
1151 case BGPTYPE_NEXT_HOP:
1152 if (len != 4)
1153 printf("invalid len");
1154 else {
1155 TCHECK2(tptr[0], 4);
1156 printf("%s", getname(tptr));
1157 }
1158 break;
1159 case BGPTYPE_MULTI_EXIT_DISC:
1160 case BGPTYPE_LOCAL_PREF:
1161 if (len != 4)
1162 printf("invalid len");
1163 else {
1164 TCHECK2(tptr[0], 4);
1165 printf("%u", EXTRACT_32BITS(tptr));
1166 }
1167 break;
1168 case BGPTYPE_ATOMIC_AGGREGATE:
1169 if (len != 0)
1170 printf("invalid len");
1171 break;
1172 case BGPTYPE_AGGREGATOR:
1173 if (len != 6) {
1174 printf("invalid len");
1175 break;
1176 }
1177 TCHECK2(tptr[0], 6);
1178 printf(" AS #%u, origin %s", EXTRACT_16BITS(tptr),
1179 getname(tptr + 2));
1180 break;
1181 case BGPTYPE_COMMUNITIES:
1182 if (len % 4) {
1183 printf("invalid len");
1184 break;
1185 }
1186 while (tlen>0) {
1187 u_int32_t comm;
1188 TCHECK2(tptr[0], 4);
1189 comm = EXTRACT_32BITS(tptr);
1190 switch (comm) {
1191 case BGP_COMMUNITY_NO_EXPORT:
1192 printf(" NO_EXPORT");
1193 break;
1194 case BGP_COMMUNITY_NO_ADVERT:
1195 printf(" NO_ADVERTISE");
1196 break;
1197 case BGP_COMMUNITY_NO_EXPORT_SUBCONFED:
1198 printf(" NO_EXPORT_SUBCONFED");
1199 break;
1200 default:
1201 printf("%u:%u%s",
1202 (comm >> 16) & 0xffff,
1203 comm & 0xffff,
1204 (tlen>4) ? ", " : "");
1205 break;
1206 }
1207 tlen -=4;
1208 tptr +=4;
1209 }
1210 break;
1211 case BGPTYPE_ORIGINATOR_ID:
1212 if (len != 4) {
1213 printf("invalid len");
1214 break;
1215 }
1216 TCHECK2(tptr[0], 4);
1217 printf("%s",getname(tptr));
1218 break;
1219 case BGPTYPE_CLUSTER_LIST:
1220 if (len % 4) {
1221 printf("invalid len");
1222 break;
1223 }
1224 while (tlen>0) {
1225 TCHECK2(tptr[0], 4);
1226 printf("%s%s",
1227 getname(tptr),
1228 (tlen>4) ? ", " : "");
1229 tlen -=4;
1230 tptr +=4;
1231 }
1232 break;
1233 case BGPTYPE_MP_REACH_NLRI:
1234 TCHECK2(tptr[0], 3);
1235 af = EXTRACT_16BITS(tptr);
1236 safi = tptr[2];
1237
1238 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1239 tok2strbuf(af_values, "Unknown AFI", af,
1240 tokbuf, sizeof(tokbuf)),
1241 af,
1242 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1243 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1244 tokbuf, sizeof(tokbuf)),
1245 safi);
1246
1247 switch(af<<8 | safi) {
1248 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1249 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1250 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1251 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1252 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1253 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1254 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1255 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1256 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN):
1257 #ifdef INET6
1258 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1259 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1260 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1261 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1262 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1263 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1264 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1265 #endif
1266 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1267 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1268 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1269 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1270 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1271 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1272 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1273 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1274 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1275 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1276 break;
1277 default:
1278 TCHECK2(tptr[0], tlen);
1279 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1280 if (vflag <= 1)
1281 print_unknown_data(tptr,"\n\t ",tlen);
1282 goto done;
1283 break;
1284 }
1285
1286 tptr +=3;
1287
1288 TCHECK(tptr[0]);
1289 nhlen = tptr[0];
1290 tlen = nhlen;
1291 tptr++;
1292
1293 if (tlen) {
1294 printf("\n\t nexthop: ");
1295 while (tlen > 0) {
1296 switch(af<<8 | safi) {
1297 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1298 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1299 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1300 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1301 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1302 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN):
1303 if (tlen < (int)sizeof(struct in_addr)) {
1304 printf("invalid len");
1305 tlen = 0;
1306 } else {
1307 TCHECK2(tptr[0], sizeof(struct in_addr));
1308 printf("%s",getname(tptr));
1309 tlen -= sizeof(struct in_addr);
1310 tptr += sizeof(struct in_addr);
1311 }
1312 break;
1313 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1314 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1315 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1316 if (tlen < (int)(sizeof(struct in_addr)+BGP_VPN_RD_LEN)) {
1317 printf("invalid len");
1318 tlen = 0;
1319 } else {
1320 TCHECK2(tptr[0], sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1321 printf("RD: %s, %s",
1322 bgp_vpn_rd_print(tptr),
1323 getname(tptr+BGP_VPN_RD_LEN));
1324 tlen -= (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1325 tptr += (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1326 }
1327 break;
1328 #ifdef INET6
1329 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1330 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1331 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1332 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1333 if (tlen < (int)sizeof(struct in6_addr)) {
1334 printf("invalid len");
1335 tlen = 0;
1336 } else {
1337 TCHECK2(tptr[0], sizeof(struct in6_addr));
1338 printf("%s", getname6(tptr));
1339 tlen -= sizeof(struct in6_addr);
1340 tptr += sizeof(struct in6_addr);
1341 }
1342 break;
1343 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1344 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1345 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1346 if (tlen < (int)(sizeof(struct in6_addr)+BGP_VPN_RD_LEN)) {
1347 printf("invalid len");
1348 tlen = 0;
1349 } else {
1350 TCHECK2(tptr[0], sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1351 printf("RD: %s, %s",
1352 bgp_vpn_rd_print(tptr),
1353 getname6(tptr+BGP_VPN_RD_LEN));
1354 tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1355 tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1356 }
1357 break;
1358 #endif
1359 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1360 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1361 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1362 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1363 if (tlen < (int)sizeof(struct in_addr)) {
1364 printf("invalid len");
1365 tlen = 0;
1366 } else {
1367 TCHECK2(tptr[0], sizeof(struct in_addr));
1368 printf("%s", getname(tptr));
1369 tlen -= (sizeof(struct in_addr));
1370 tptr += (sizeof(struct in_addr));
1371 }
1372 break;
1373 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1374 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1375 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1376 TCHECK2(tptr[0], tlen);
1377 printf("%s",isonsap_string(tptr,tlen));
1378 tptr += tlen;
1379 tlen = 0;
1380 break;
1381
1382 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1383 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1384 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1385 if (tlen < BGP_VPN_RD_LEN+1) {
1386 printf("invalid len");
1387 tlen = 0;
1388 } else {
1389 TCHECK2(tptr[0], tlen);
1390 printf("RD: %s, %s",
1391 bgp_vpn_rd_print(tptr),
1392 isonsap_string(tptr+BGP_VPN_RD_LEN,tlen-BGP_VPN_RD_LEN));
1393 /* rfc986 mapped IPv4 address ? */
1394 if (EXTRACT_32BITS(tptr+BGP_VPN_RD_LEN) == 0x47000601)
1395 printf(" = %s", getname(tptr+BGP_VPN_RD_LEN+4));
1396 #ifdef INET6
1397 /* rfc1888 mapped IPv6 address ? */
1398 else if (EXTRACT_24BITS(tptr+BGP_VPN_RD_LEN) == 0x350000)
1399 printf(" = %s", getname6(tptr+BGP_VPN_RD_LEN+3));
1400 #endif
1401 tptr += tlen;
1402 tlen = 0;
1403 }
1404 break;
1405 default:
1406 TCHECK2(tptr[0], tlen);
1407 printf("no AFI %u/SAFI %u decoder",af,safi);
1408 if (vflag <= 1)
1409 print_unknown_data(tptr,"\n\t ",tlen);
1410 tptr += tlen;
1411 tlen = 0;
1412 goto done;
1413 break;
1414 }
1415 }
1416 }
1417 printf(", nh-length: %u", nhlen);
1418 tptr += tlen;
1419
1420 TCHECK(tptr[0]);
1421 snpa = tptr[0];
1422 tptr++;
1423
1424 if (snpa) {
1425 printf("\n\t %u SNPA", snpa);
1426 for (/*nothing*/; snpa > 0; snpa--) {
1427 TCHECK(tptr[0]);
1428 printf("\n\t %d bytes", tptr[0]);
1429 tptr += tptr[0] + 1;
1430 }
1431 } else {
1432 printf(", no SNPA");
1433 }
1434
1435 while (len - (tptr - pptr) > 0) {
1436 switch (af<<8 | safi) {
1437 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1438 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1439 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1440 advance = decode_prefix4(tptr, buf, sizeof(buf));
1441 if (advance == -1)
1442 printf("\n\t (illegal prefix length)");
1443 else if (advance == -2)
1444 goto trunc;
1445 else
1446 printf("\n\t %s", buf);
1447 break;
1448 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1449 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1450 if (advance == -1)
1451 printf("\n\t (illegal prefix length)");
1452 else if (advance == -2)
1453 goto trunc;
1454 else
1455 printf("\n\t %s", buf);
1456 break;
1457 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1458 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1459 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1460 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1461 if (advance == -1)
1462 printf("\n\t (illegal prefix length)");
1463 else if (advance == -2)
1464 goto trunc;
1465 else
1466 printf("\n\t %s", buf);
1467 break;
1468 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1469 advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1470 if (advance == -1)
1471 printf("\n\t (illegal prefix length)");
1472 else if (advance == -2)
1473 goto trunc;
1474 else
1475 printf("\n\t %s", buf);
1476 break;
1477 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */
1478 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN):
1479 advance = decode_multicast_vpn(tptr, buf, sizeof(buf));
1480 if (advance == -1)
1481 printf("\n\t (illegal prefix length)");
1482 else if (advance == -2)
1483 goto trunc;
1484 else
1485 printf("\n\t %s", buf);
1486 break;
1487 #ifdef INET6
1488 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1489 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1490 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1491 advance = decode_prefix6(tptr, buf, sizeof(buf));
1492 if (advance == -1)
1493 printf("\n\t (illegal prefix length)");
1494 else if (advance == -2)
1495 goto trunc;
1496 else
1497 printf("\n\t %s", buf);
1498 break;
1499 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1500 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1501 if (advance == -1)
1502 printf("\n\t (illegal prefix length)");
1503 else if (advance == -2)
1504 goto trunc;
1505 else
1506 printf("\n\t %s", buf);
1507 break;
1508 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1509 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1510 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1511 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1512 if (advance == -1)
1513 printf("\n\t (illegal prefix length)");
1514 else if (advance == -2)
1515 goto trunc;
1516 else
1517 printf("\n\t %s", buf);
1518 break;
1519 #endif
1520 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1521 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1522 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1523 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1524 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1525 if (advance == -1)
1526 printf("\n\t (illegal length)");
1527 else if (advance == -2)
1528 goto trunc;
1529 else
1530 printf("\n\t %s", buf);
1531 break;
1532 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1533 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1534 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1535 advance = decode_clnp_prefix(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_NSAP<<8 | SAFNUM_VPNUNICAST):
1544 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1545 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1546 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1547 if (advance == -1)
1548 printf("\n\t (illegal prefix length)");
1549 else if (advance == -2)
1550 goto trunc;
1551 else
1552 printf("\n\t %s", buf);
1553 break;
1554 default:
1555 TCHECK2(*tptr,tlen);
1556 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1557 if (vflag <= 1)
1558 print_unknown_data(tptr,"\n\t ",tlen);
1559 advance = 0;
1560 tptr = pptr + len;
1561 break;
1562 }
1563 if (advance < 0)
1564 break;
1565 tptr += advance;
1566 }
1567 done:
1568 break;
1569
1570 case BGPTYPE_MP_UNREACH_NLRI:
1571 TCHECK2(tptr[0], BGP_MP_NLRI_MINSIZE);
1572 af = EXTRACT_16BITS(tptr);
1573 safi = tptr[2];
1574
1575 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1576 tok2strbuf(af_values, "Unknown AFI", af,
1577 tokbuf, sizeof(tokbuf)),
1578 af,
1579 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1580 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1581 tokbuf, sizeof(tokbuf)),
1582 safi);
1583
1584 if (len == BGP_MP_NLRI_MINSIZE)
1585 printf("\n\t End-of-Rib Marker (empty NLRI)");
1586
1587 tptr += 3;
1588
1589 while (len - (tptr - pptr) > 0) {
1590 switch (af<<8 | safi) {
1591 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1592 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1593 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1594 advance = decode_prefix4(tptr, buf, sizeof(buf));
1595 if (advance == -1)
1596 printf("\n\t (illegal prefix length)");
1597 else if (advance == -2)
1598 goto trunc;
1599 else
1600 printf("\n\t %s", buf);
1601 break;
1602 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1603 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1604 if (advance == -1)
1605 printf("\n\t (illegal prefix length)");
1606 else if (advance == -2)
1607 goto trunc;
1608 else
1609 printf("\n\t %s", buf);
1610 break;
1611 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1612 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1613 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1614 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1615 if (advance == -1)
1616 printf("\n\t (illegal prefix length)");
1617 else if (advance == -2)
1618 goto trunc;
1619 else
1620 printf("\n\t %s", buf);
1621 break;
1622 #ifdef INET6
1623 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1624 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1625 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1626 advance = decode_prefix6(tptr, buf, sizeof(buf));
1627 if (advance == -1)
1628 printf("\n\t (illegal prefix length)");
1629 else if (advance == -2)
1630 goto trunc;
1631 else
1632 printf("\n\t %s", buf);
1633 break;
1634 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1635 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1636 if (advance == -1)
1637 printf("\n\t (illegal prefix length)");
1638 else if (advance == -2)
1639 goto trunc;
1640 else
1641 printf("\n\t %s", buf);
1642 break;
1643 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1644 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1645 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1646 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1647 if (advance == -1)
1648 printf("\n\t (illegal prefix length)");
1649 else if (advance == -2)
1650 goto trunc;
1651 else
1652 printf("\n\t %s", buf);
1653 break;
1654 #endif
1655 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1656 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1657 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1658 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1659 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1660 if (advance == -1)
1661 printf("\n\t (illegal length)");
1662 else if (advance == -2)
1663 goto trunc;
1664 else
1665 printf("\n\t %s", buf);
1666 break;
1667 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1668 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1669 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1670 advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1671 if (advance == -1)
1672 printf("\n\t (illegal prefix length)");
1673 else if (advance == -2)
1674 goto trunc;
1675 else
1676 printf("\n\t %s", buf);
1677 break;
1678 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1679 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1680 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1681 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1682 if (advance == -1)
1683 printf("\n\t (illegal prefix length)");
1684 else if (advance == -2)
1685 goto trunc;
1686 else
1687 printf("\n\t %s", buf);
1688 break;
1689 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */
1690 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN):
1691 advance = decode_multicast_vpn(tptr, buf, sizeof(buf));
1692 if (advance == -1)
1693 printf("\n\t (illegal prefix length)");
1694 else if (advance == -2)
1695 goto trunc;
1696 else
1697 printf("\n\t %s", buf);
1698 break;
1699 default:
1700 TCHECK2(*(tptr-3),tlen);
1701 printf("no AFI %u / SAFI %u decoder",af,safi);
1702 if (vflag <= 1)
1703 print_unknown_data(tptr-3,"\n\t ",tlen);
1704 advance = 0;
1705 tptr = pptr + len;
1706 break;
1707 }
1708 if (advance < 0)
1709 break;
1710 tptr += advance;
1711 }
1712 break;
1713 case BGPTYPE_EXTD_COMMUNITIES:
1714 if (len % 8) {
1715 printf("invalid len");
1716 break;
1717 }
1718 while (tlen>0) {
1719 u_int16_t extd_comm;
1720
1721 TCHECK2(tptr[0], 2);
1722 extd_comm=EXTRACT_16BITS(tptr);
1723
1724 printf("\n\t %s (0x%04x), Flags [%s]",
1725 tok2strbuf(bgp_extd_comm_subtype_values,
1726 "unknown extd community typecode",
1727 extd_comm, tokbuf, sizeof(tokbuf)),
1728 extd_comm,
1729 bittok2str(bgp_extd_comm_flag_values, "none", extd_comm));
1730
1731 TCHECK2(*(tptr+2), 6);
1732 switch(extd_comm) {
1733 case BGP_EXT_COM_RT_0:
1734 case BGP_EXT_COM_RO_0:
1735 printf(": %u:%s",
1736 EXTRACT_16BITS(tptr+2),
1737 getname(tptr+4));
1738 break;
1739 case BGP_EXT_COM_RT_1:
1740 case BGP_EXT_COM_RO_1:
1741 case BGP_EXT_COM_VRF_RT_IMP:
1742 printf(": %s:%u",
1743 getname(tptr+2),
1744 EXTRACT_16BITS(tptr+6));
1745 break;
1746 case BGP_EXT_COM_RT_2:
1747 case BGP_EXT_COM_RO_2:
1748 printf(": %u:%u",
1749 EXTRACT_32BITS(tptr+2),
1750 EXTRACT_16BITS(tptr+6));
1751 break;
1752 case BGP_EXT_COM_LINKBAND:
1753 bw.i = EXTRACT_32BITS(tptr+2);
1754 printf(": bandwidth: %.3f Mbps",
1755 bw.f*8/1000000);
1756 break;
1757 case BGP_EXT_COM_VPN_ORIGIN:
1758 case BGP_EXT_COM_VPN_ORIGIN2:
1759 case BGP_EXT_COM_VPN_ORIGIN3:
1760 case BGP_EXT_COM_VPN_ORIGIN4:
1761 case BGP_EXT_COM_OSPF_RID:
1762 case BGP_EXT_COM_OSPF_RID2:
1763 printf("%s", getname(tptr+2));
1764 break;
1765 case BGP_EXT_COM_OSPF_RTYPE:
1766 case BGP_EXT_COM_OSPF_RTYPE2:
1767 printf(": area:%s, router-type:%s, metric-type:%s%s",
1768 getname(tptr+2),
1769 tok2strbuf(bgp_extd_comm_ospf_rtype_values,
1770 "unknown (0x%02x)",
1771 *(tptr+6),
1772 tokbuf, sizeof(tokbuf)),
1773 (*(tptr+7) & BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "",
1774 ((*(tptr+6) == BGP_OSPF_RTYPE_EXT) || (*(tptr+6) == BGP_OSPF_RTYPE_NSSA)) ? "E1" : "");
1775 break;
1776 case BGP_EXT_COM_L2INFO:
1777 printf(": %s Control Flags [0x%02x]:MTU %u",
1778 tok2strbuf(l2vpn_encaps_values,
1779 "unknown encaps",
1780 *(tptr+2),
1781 tokbuf, sizeof(tokbuf)),
1782 *(tptr+3),
1783 EXTRACT_16BITS(tptr+4));
1784 break;
1785 case BGP_EXT_COM_SOURCE_AS:
1786 printf(": AS %u", EXTRACT_16BITS(tptr+2));
1787 break;
1788 default:
1789 TCHECK2(*tptr,8);
1790 print_unknown_data(tptr,"\n\t ",8);
1791 break;
1792 }
1793 tlen -=8;
1794 tptr +=8;
1795 }
1796 break;
1797
1798 case BGPTYPE_PMSI_TUNNEL:
1799 {
1800 u_int8_t tunnel_type, flags;
1801
1802 tunnel_type = *(tptr+1);
1803 flags = *tptr;
1804 tlen = len;
1805
1806 TCHECK2(tptr[0], 5);
1807 printf("\n\t Tunnel-type %s (%u), Flags [%s], MPLS Label %u",
1808 tok2str(bgp_pmsi_tunnel_values, "Unknown", tunnel_type),
1809 tunnel_type,
1810 bittok2str(bgp_pmsi_flag_values, "none", flags),
1811 EXTRACT_24BITS(tptr+2)>>4);
1812
1813 tptr +=5;
1814 tlen -= 5;
1815
1816 switch (tunnel_type) {
1817 case BGP_PMSI_TUNNEL_PIM_SM: /* fall through */
1818 case BGP_PMSI_TUNNEL_PIM_BIDIR:
1819 TCHECK2(tptr[0], 8);
1820 printf("\n\t Sender %s, P-Group %s",
1821 ipaddr_string(tptr),
1822 ipaddr_string(tptr+4));
1823 break;
1824
1825 case BGP_PMSI_TUNNEL_PIM_SSM:
1826 TCHECK2(tptr[0], 8);
1827 printf("\n\t Root-Node %s, P-Group %s",
1828 ipaddr_string(tptr),
1829 ipaddr_string(tptr+4));
1830 break;
1831 case BGP_PMSI_TUNNEL_INGRESS:
1832 TCHECK2(tptr[0], 4);
1833 printf("\n\t Tunnel-Endpoint %s",
1834 ipaddr_string(tptr));
1835 break;
1836 case BGP_PMSI_TUNNEL_LDP_P2MP: /* fall through */
1837 case BGP_PMSI_TUNNEL_LDP_MP2MP:
1838 TCHECK2(tptr[0], 8);
1839 printf("\n\t Root-Node %s, LSP-ID 0x%08x",
1840 ipaddr_string(tptr),
1841 EXTRACT_32BITS(tptr+4));
1842 break;
1843 case BGP_PMSI_TUNNEL_RSVP_P2MP:
1844 TCHECK2(tptr[0], 8);
1845 printf("\n\t Extended-Tunnel-ID %s, P2MP-ID 0x%08x",
1846 ipaddr_string(tptr),
1847 EXTRACT_32BITS(tptr+4));
1848 break;
1849 default:
1850 if (vflag <= 1) {
1851 print_unknown_data(tptr,"\n\t ",tlen);
1852 }
1853 }
1854 break;
1855 }
1856 case BGPTYPE_ATTR_SET:
1857 TCHECK2(tptr[0], 4);
1858 printf("\n\t Origin AS: %u", EXTRACT_32BITS(tptr));
1859 tptr+=4;
1860 len -=4;
1861
1862 while (len >= 2 ) {
1863 int alen;
1864 struct bgp_attr bgpa;
1865
1866 TCHECK2(tptr[0], sizeof(bgpa));
1867 memcpy(&bgpa, tptr, sizeof(bgpa));
1868 alen = bgp_attr_len(&bgpa);
1869 tptr += bgp_attr_off(&bgpa);
1870 len -= bgp_attr_off(&bgpa);
1871
1872 printf("\n\t %s (%u), length: %u",
1873 tok2strbuf(bgp_attr_values,
1874 "Unknown Attribute", bgpa.bgpa_type,
1875 tokbuf, sizeof(tokbuf)),
1876 bgpa.bgpa_type,
1877 alen);
1878
1879 if (bgpa.bgpa_flags) {
1880 printf(", Flags [%s%s%s%s",
1881 bgpa.bgpa_flags & 0x80 ? "O" : "",
1882 bgpa.bgpa_flags & 0x40 ? "T" : "",
1883 bgpa.bgpa_flags & 0x20 ? "P" : "",
1884 bgpa.bgpa_flags & 0x10 ? "E" : "");
1885 if (bgpa.bgpa_flags & 0xf)
1886 printf("+%x", bgpa.bgpa_flags & 0xf);
1887 printf("]: ");
1888 }
1889 /* FIXME check for recursion */
1890 if (!bgp_attr_print(&bgpa, tptr, alen))
1891 return 0;
1892 tptr += alen;
1893 len -= alen;
1894 }
1895 break;
1896
1897
1898 default:
1899 TCHECK2(*pptr,len);
1900 printf("\n\t no Attribute %u decoder",attr->bgpa_type); /* we have no decoder for the attribute */
1901 if (vflag <= 1)
1902 print_unknown_data(pptr,"\n\t ",len);
1903 break;
1904 }
1905 if (vflag > 1 && len) { /* omit zero length attributes*/
1906 TCHECK2(*pptr,len);
1907 print_unknown_data(pptr,"\n\t ",len);
1908 }
1909 return 1;
1910
1911 trunc:
1912 return 0;
1913 }
1914
1915 static void
1916 bgp_open_print(const u_char *dat, int length)
1917 {
1918 struct bgp_open bgpo;
1919 struct bgp_opt bgpopt;
1920 const u_char *opt;
1921 int i,cap_type,cap_len,tcap_len,cap_offset;
1922 char tokbuf[TOKBUFSIZE];
1923 char tokbuf2[TOKBUFSIZE];
1924
1925 TCHECK2(dat[0], BGP_OPEN_SIZE);
1926 memcpy(&bgpo, dat, BGP_OPEN_SIZE);
1927
1928 printf("\n\t Version %d, ", bgpo.bgpo_version);
1929 printf("my AS %u, ", ntohs(bgpo.bgpo_myas));
1930 printf("Holdtime %us, ", ntohs(bgpo.bgpo_holdtime));
1931 printf("ID %s", getname((u_char *)&bgpo.bgpo_id));
1932 printf("\n\t Optional parameters, length: %u", bgpo.bgpo_optlen);
1933
1934 /* some little sanity checking */
1935 if (length < bgpo.bgpo_optlen+BGP_OPEN_SIZE)
1936 return;
1937
1938 /* ugly! */
1939 opt = &((const struct bgp_open *)dat)->bgpo_optlen;
1940 opt++;
1941
1942 i = 0;
1943 while (i < bgpo.bgpo_optlen) {
1944 TCHECK2(opt[i], BGP_OPT_SIZE);
1945 memcpy(&bgpopt, &opt[i], BGP_OPT_SIZE);
1946 if (i + 2 + bgpopt.bgpopt_len > bgpo.bgpo_optlen) {
1947 printf("\n\t Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len);
1948 break;
1949 }
1950
1951 printf("\n\t Option %s (%u), length: %u",
1952 tok2strbuf(bgp_opt_values,"Unknown",
1953 bgpopt.bgpopt_type,
1954 tokbuf, sizeof(tokbuf)),
1955 bgpopt.bgpopt_type,
1956 bgpopt.bgpopt_len);
1957
1958 /* now lets decode the options we know*/
1959 switch(bgpopt.bgpopt_type) {
1960 case BGP_OPT_CAP:
1961 cap_type=opt[i+BGP_OPT_SIZE];
1962 cap_len=opt[i+BGP_OPT_SIZE+1];
1963 tcap_len=cap_len;
1964 printf("\n\t %s (%u), length: %u",
1965 tok2strbuf(bgp_capcode_values, "Unknown",
1966 cap_type, tokbuf, sizeof(tokbuf)),
1967 cap_type,
1968 cap_len);
1969 switch(cap_type) {
1970 case BGP_CAPCODE_MP:
1971 printf("\n\t\tAFI %s (%u), SAFI %s (%u)",
1972 tok2strbuf(af_values, "Unknown",
1973 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1974 tokbuf, sizeof(tokbuf)),
1975 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1976 tok2strbuf(bgp_safi_values, "Unknown",
1977 opt[i+BGP_OPT_SIZE+5],
1978 tokbuf, sizeof(tokbuf)),
1979 opt[i+BGP_OPT_SIZE+5]);
1980 break;
1981 case BGP_CAPCODE_RESTART:
1982 printf("\n\t\tRestart Flags: [%s], Restart Time %us",
1983 ((opt[i+BGP_OPT_SIZE+2])&0x80) ? "R" : "none",
1984 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2)&0xfff);
1985 tcap_len-=2;
1986 cap_offset=4;
1987 while(tcap_len>=4) {
1988 printf("\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s",
1989 tok2strbuf(af_values,"Unknown",
1990 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1991 tokbuf, sizeof(tokbuf)),
1992 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1993 tok2strbuf(bgp_safi_values,"Unknown",
1994 opt[i+BGP_OPT_SIZE+cap_offset+2],
1995 tokbuf2, sizeof(tokbuf2)),
1996 opt[i+BGP_OPT_SIZE+cap_offset+2],
1997 ((opt[i+BGP_OPT_SIZE+cap_offset+3])&0x80) ? "yes" : "no" );
1998 tcap_len-=4;
1999 cap_offset+=4;
2000 }
2001 break;
2002 case BGP_CAPCODE_RR:
2003 case BGP_CAPCODE_RR_CISCO:
2004 break;
2005 default:
2006 TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
2007 printf("\n\t\tno decoder for Capability %u",
2008 cap_type);
2009 if (vflag <= 1)
2010 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
2011 break;
2012 }
2013 if (vflag > 1) {
2014 TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
2015 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
2016 }
2017 break;
2018 case BGP_OPT_AUTH:
2019 default:
2020 printf("\n\t no decoder for option %u",
2021 bgpopt.bgpopt_type);
2022 break;
2023 }
2024
2025 i += BGP_OPT_SIZE + bgpopt.bgpopt_len;
2026 }
2027 return;
2028 trunc:
2029 printf("[|BGP]");
2030 }
2031
2032 static void
2033 bgp_update_print(const u_char *dat, int length)
2034 {
2035 struct bgp bgp;
2036 struct bgp_attr bgpa;
2037 const u_char *p;
2038 int len;
2039 int i;
2040 char tokbuf[TOKBUFSIZE];
2041
2042 TCHECK2(dat[0], BGP_SIZE);
2043 memcpy(&bgp, dat, BGP_SIZE);
2044 p = dat + BGP_SIZE; /*XXX*/
2045
2046 /* Unfeasible routes */
2047 len = EXTRACT_16BITS(p);
2048 if (len) {
2049 /*
2050 * Without keeping state from the original NLRI message,
2051 * it's not possible to tell if this a v4 or v6 route,
2052 * so only try to decode it if we're not v6 enabled.
2053 */
2054 #ifdef INET6
2055 printf("\n\t Withdrawn routes: %d bytes", len);
2056 #else
2057 char buf[MAXHOSTNAMELEN + 100];
2058 int wpfx;
2059
2060 TCHECK2(p[2], len);
2061 i = 2;
2062
2063 printf("\n\t Withdrawn routes:");
2064
2065 while(i < 2 + len) {
2066 wpfx = decode_prefix4(&p[i], buf, sizeof(buf));
2067 if (wpfx == -1) {
2068 printf("\n\t (illegal prefix length)");
2069 break;
2070 } else if (wpfx == -2)
2071 goto trunc;
2072 else {
2073 i += wpfx;
2074 printf("\n\t %s", buf);
2075 }
2076 }
2077 #endif
2078 }
2079 p += 2 + len;
2080
2081 TCHECK2(p[0], 2);
2082 len = EXTRACT_16BITS(p);
2083
2084 if (len == 0 && length == BGP_UPDATE_MINSIZE) {
2085 printf("\n\t End-of-Rib Marker (empty NLRI)");
2086 return;
2087 }
2088
2089 if (len) {
2090 /* do something more useful!*/
2091 i = 2;
2092 while (i < 2 + len) {
2093 int alen, aoff;
2094
2095 TCHECK2(p[i], sizeof(bgpa));
2096 memcpy(&bgpa, &p[i], sizeof(bgpa));
2097 alen = bgp_attr_len(&bgpa);
2098 aoff = bgp_attr_off(&bgpa);
2099
2100 printf("\n\t %s (%u), length: %u",
2101 tok2strbuf(bgp_attr_values, "Unknown Attribute",
2102 bgpa.bgpa_type,
2103 tokbuf, sizeof(tokbuf)),
2104 bgpa.bgpa_type,
2105 alen);
2106
2107 if (bgpa.bgpa_flags) {
2108 printf(", Flags [%s%s%s%s",
2109 bgpa.bgpa_flags & 0x80 ? "O" : "",
2110 bgpa.bgpa_flags & 0x40 ? "T" : "",
2111 bgpa.bgpa_flags & 0x20 ? "P" : "",
2112 bgpa.bgpa_flags & 0x10 ? "E" : "");
2113 if (bgpa.bgpa_flags & 0xf)
2114 printf("+%x", bgpa.bgpa_flags & 0xf);
2115 printf("]: ");
2116 }
2117 if (!bgp_attr_print(&bgpa, &p[i + aoff], alen))
2118 goto trunc;
2119 i += aoff + alen;
2120 }
2121 }
2122 p += 2 + len;
2123
2124 if (dat + length > p) {
2125 printf("\n\t Updated routes:");
2126 while (dat + length > p) {
2127 char buf[MAXHOSTNAMELEN + 100];
2128 i = decode_prefix4(p, buf, sizeof(buf));
2129 if (i == -1) {
2130 printf("\n\t (illegal prefix length)");
2131 break;
2132 } else if (i == -2)
2133 goto trunc;
2134 else {
2135 printf("\n\t %s", buf);
2136 p += i;
2137 }
2138 }
2139 }
2140 return;
2141 trunc:
2142 printf("[|BGP]");
2143 }
2144
2145 static void
2146 bgp_notification_print(const u_char *dat, int length)
2147 {
2148 struct bgp_notification bgpn;
2149 const u_char *tptr;
2150 char tokbuf[TOKBUFSIZE];
2151 char tokbuf2[TOKBUFSIZE];
2152
2153 TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
2154 memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
2155
2156 /* some little sanity checking */
2157 if (length<BGP_NOTIFICATION_SIZE)
2158 return;
2159
2160 printf(", %s (%u)",
2161 tok2strbuf(bgp_notify_major_values, "Unknown Error",
2162 bgpn.bgpn_major, tokbuf, sizeof(tokbuf)),
2163 bgpn.bgpn_major);
2164
2165 switch (bgpn.bgpn_major) {
2166
2167 case BGP_NOTIFY_MAJOR_MSG:
2168 printf(", subcode %s (%u)",
2169 tok2strbuf(bgp_notify_minor_msg_values, "Unknown",
2170 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2171 bgpn.bgpn_minor);
2172 break;
2173 case BGP_NOTIFY_MAJOR_OPEN:
2174 printf(", subcode %s (%u)",
2175 tok2strbuf(bgp_notify_minor_open_values, "Unknown",
2176 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2177 bgpn.bgpn_minor);
2178 break;
2179 case BGP_NOTIFY_MAJOR_UPDATE:
2180 printf(", subcode %s (%u)",
2181 tok2strbuf(bgp_notify_minor_update_values, "Unknown",
2182 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2183 bgpn.bgpn_minor);
2184 break;
2185 case BGP_NOTIFY_MAJOR_CAP:
2186 printf(" subcode %s (%u)",
2187 tok2strbuf(bgp_notify_minor_cap_values, "Unknown",
2188 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2189 bgpn.bgpn_minor);
2190 case BGP_NOTIFY_MAJOR_CEASE:
2191 printf(", subcode %s (%u)",
2192 tok2strbuf(bgp_notify_minor_cease_values, "Unknown",
2193 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2194 bgpn.bgpn_minor);
2195
2196 /* draft-ietf-idr-cease-subcode-02 mentions optionally 7 bytes
2197 * for the maxprefix subtype, which may contain AFI, SAFI and MAXPREFIXES
2198 */
2199 if(bgpn.bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= BGP_NOTIFICATION_SIZE + 7) {
2200 tptr = dat + BGP_NOTIFICATION_SIZE;
2201 TCHECK2(*tptr, 7);
2202 printf(", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
2203 tok2strbuf(af_values, "Unknown",
2204 EXTRACT_16BITS(tptr), tokbuf, sizeof(tokbuf)),
2205 EXTRACT_16BITS(tptr),
2206 tok2strbuf(bgp_safi_values, "Unknown", *(tptr+2),
2207 tokbuf2, sizeof(tokbuf)),
2208 *(tptr+2),
2209 EXTRACT_32BITS(tptr+3));
2210 }
2211 break;
2212 default:
2213 break;
2214 }
2215
2216 return;
2217 trunc:
2218 printf("[|BGP]");
2219 }
2220
2221 static void
2222 bgp_route_refresh_print(const u_char *pptr, int len) {
2223
2224 const struct bgp_route_refresh *bgp_route_refresh_header;
2225 char tokbuf[TOKBUFSIZE];
2226 char tokbuf2[TOKBUFSIZE];
2227
2228 TCHECK2(pptr[0], BGP_ROUTE_REFRESH_SIZE);
2229
2230 /* some little sanity checking */
2231 if (len<BGP_ROUTE_REFRESH_SIZE)
2232 return;
2233
2234 bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
2235
2236 printf("\n\t AFI %s (%u), SAFI %s (%u)",
2237 tok2strbuf(af_values,"Unknown",
2238 /* this stinks but the compiler pads the structure
2239 * weird */
2240 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
2241 tokbuf, sizeof(tokbuf)),
2242 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
2243 tok2strbuf(bgp_safi_values,"Unknown",
2244 bgp_route_refresh_header->safi,
2245 tokbuf2, sizeof(tokbuf2)),
2246 bgp_route_refresh_header->safi);
2247
2248 if (vflag > 1) {
2249 TCHECK2(*pptr, len);
2250 print_unknown_data(pptr,"\n\t ", len);
2251 }
2252
2253 return;
2254 trunc:
2255 printf("[|BGP]");
2256 }
2257
2258 static int
2259 bgp_header_print(const u_char *dat, int length)
2260 {
2261 struct bgp bgp;
2262 char tokbuf[TOKBUFSIZE];
2263
2264 TCHECK2(dat[0], BGP_SIZE);
2265 memcpy(&bgp, dat, BGP_SIZE);
2266 printf("\n\t%s Message (%u), length: %u",
2267 tok2strbuf(bgp_msg_values, "Unknown", bgp.bgp_type,
2268 tokbuf, sizeof(tokbuf)),
2269 bgp.bgp_type,
2270 length);
2271
2272 switch (bgp.bgp_type) {
2273 case BGP_OPEN:
2274 bgp_open_print(dat, length);
2275 break;
2276 case BGP_UPDATE:
2277 bgp_update_print(dat, length);
2278 break;
2279 case BGP_NOTIFICATION:
2280 bgp_notification_print(dat, length);
2281 break;
2282 case BGP_KEEPALIVE:
2283 break;
2284 case BGP_ROUTE_REFRESH:
2285 bgp_route_refresh_print(dat, length);
2286 break;
2287 default:
2288 /* we have no decoder for the BGP message */
2289 TCHECK2(*dat, length);
2290 printf("\n\t no Message %u decoder",bgp.bgp_type);
2291 print_unknown_data(dat,"\n\t ",length);
2292 break;
2293 }
2294 return 1;
2295 trunc:
2296 printf("[|BGP]");
2297 return 0;
2298 }
2299
2300 void
2301 bgp_print(const u_char *dat, int length)
2302 {
2303 const u_char *p;
2304 const u_char *ep;
2305 const u_char *start;
2306 const u_char marker[] = {
2307 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
2308 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
2309 };
2310 struct bgp bgp;
2311 u_int16_t hlen;
2312 char tokbuf[TOKBUFSIZE];
2313
2314 ep = dat + length;
2315 if (snapend < dat + length)
2316 ep = snapend;
2317
2318 printf(": BGP, length: %u",length);
2319
2320 if (vflag < 1) /* lets be less chatty */
2321 return;
2322
2323 p = dat;
2324 start = p;
2325 while (p < ep) {
2326 if (!TTEST2(p[0], 1))
2327 break;
2328 if (p[0] != 0xff) {
2329 p++;
2330 continue;
2331 }
2332
2333 if (!TTEST2(p[0], sizeof(marker)))
2334 break;
2335 if (memcmp(p, marker, sizeof(marker)) != 0) {
2336 p++;
2337 continue;
2338 }
2339
2340 /* found BGP header */
2341 TCHECK2(p[0], BGP_SIZE); /*XXX*/
2342 memcpy(&bgp, p, BGP_SIZE);
2343
2344 if (start != p)
2345 printf(" [|BGP]");
2346
2347 hlen = ntohs(bgp.bgp_len);
2348 if (hlen < BGP_SIZE) {
2349 printf("\n[|BGP Bogus header length %u < %u]", hlen,
2350 BGP_SIZE);
2351 break;
2352 }
2353
2354 if (TTEST2(p[0], hlen)) {
2355 if (!bgp_header_print(p, hlen))
2356 return;
2357 p += hlen;
2358 start = p;
2359 } else {
2360 printf("\n[|BGP %s]",
2361 tok2strbuf(bgp_msg_values,
2362 "Unknown Message Type",
2363 bgp.bgp_type,
2364 tokbuf, sizeof(tokbuf)));
2365 break;
2366 }
2367 }
2368
2369 return;
2370
2371 trunc:
2372 printf(" [|BGP]");
2373 }
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