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change 802.1ag pre-standard codepoint to standard codepoint
[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 1.115 2007-07-22 02:42:53 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 #ifdef INET6
548 case (sizeof(struct in6_addr) << 3): /* 128 */
549 TCHECK2(pptr[0], sizeof(struct in6_addr));
550 snprintf(pos, sizeof(addr), "%s", ip6addr_string(pptr));
551 break;
552 #endif
553 default:
554 snprintf(pos, sizeof(addr), "bogus address length %u", addr_length);
555 break;
556 }
557 pos += strlen(pos);
558
559 trunc:
560 *(pos) = '\0';
561 return (addr);
562 }
563
564 /*
565 * bgp_vpn_sg_print
566 *
567 * print an multicast s,g entry into a buffer.
568 * the s,g entry is encoded like this.
569 *
570 * +-----------------------------------+
571 * | Multicast Source Length (1 octet) |
572 * +-----------------------------------+
573 * | Multicast Source (Variable) |
574 * +-----------------------------------+
575 * | Multicast Group Length (1 octet) |
576 * +-----------------------------------+
577 * | Multicast Group (Variable) |
578 * +-----------------------------------+
579 *
580 * return the number of bytes read from the wire.
581 */
582 static int
583 bgp_vpn_sg_print (const u_char *pptr, char *buf, u_int buflen) {
584
585 u_int8_t addr_length;
586 u_int total_length, offset;
587
588 total_length = 0;
589
590 /* Source address length, encoded in bits */
591 TCHECK2(pptr[0], 1);
592 addr_length = *pptr++;
593
594 /* Source address */
595 TCHECK2(pptr[0], (addr_length >> 3));
596 total_length += (addr_length >> 3) + 1;
597 offset = strlen(buf);
598 if (addr_length) {
599 snprintf(buf + offset, buflen - offset, ", Source %s",
600 bgp_vpn_ip_print(pptr, addr_length));
601 pptr += (addr_length >> 3);
602 }
603
604 /* Group address length, encoded in bits */
605 TCHECK2(pptr[0], 1);
606 addr_length = *pptr++;
607
608 /* Group address */
609 TCHECK2(pptr[0], (addr_length >> 3));
610 total_length += (addr_length >> 3) + 1;
611 offset = strlen(buf);
612 if (addr_length) {
613 snprintf(buf + offset, buflen - offset, ", Group %s",
614 bgp_vpn_ip_print(pptr, addr_length));
615 pptr += (addr_length >> 3);
616 }
617
618 trunc:
619 return (total_length);
620 }
621
622
623 /* RDs and RTs share the same semantics
624 * we use bgp_vpn_rd_print for
625 * printing route targets inside a NLRI */
626 char *
627 bgp_vpn_rd_print (const u_char *pptr) {
628
629 /* allocate space for the largest possible string */
630 static char rd[sizeof("xxxxxxxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")];
631 char *pos = rd;
632
633 /* ok lets load the RD format */
634 switch (EXTRACT_16BITS(pptr)) {
635
636 /* AS:IP-address fmt*/
637 case 0:
638 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u.%u.%u.%u",
639 EXTRACT_16BITS(pptr+2), *(pptr+4), *(pptr+5), *(pptr+6), *(pptr+7));
640 break;
641 /* IP-address:AS fmt*/
642
643 case 1:
644 snprintf(pos, sizeof(rd) - (pos - rd), "%u.%u.%u.%u:%u",
645 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
646 break;
647
648 /* 4-byte-AS:number fmt*/
649 case 2:
650 snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u (%u.%u.%u.%u:%u)",
651 EXTRACT_32BITS(pptr+2), EXTRACT_16BITS(pptr+6),
652 *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
653 break;
654 default:
655 snprintf(pos, sizeof(rd) - (pos - rd), "unknown RD format");
656 break;
657 }
658 pos += strlen(pos);
659 *(pos) = '\0';
660 return (rd);
661 }
662
663 static int
664 decode_rt_routing_info(const u_char *pptr, char *buf, u_int buflen)
665 {
666 u_int8_t route_target[8];
667 u_int plen;
668
669 TCHECK(pptr[0]);
670 plen = pptr[0]; /* get prefix length */
671
672 if (0 == plen)
673 return 1; /* default route target */
674
675 if (32 > plen)
676 return -1;
677
678 plen-=32; /* adjust prefix length */
679
680 if (64 < plen)
681 return -1;
682
683 memset(&route_target, 0, sizeof(route_target));
684 TCHECK2(pptr[1], (plen + 7) / 8);
685 memcpy(&route_target, &pptr[1], (plen + 7) / 8);
686 if (plen % 8) {
687 ((u_char *)&route_target)[(plen + 7) / 8 - 1] &=
688 ((0xff00 >> (plen % 8)) & 0xff);
689 }
690 snprintf(buf, buflen, "origin AS: %u, route target %s",
691 EXTRACT_32BITS(pptr+1),
692 bgp_vpn_rd_print((u_char *)&route_target));
693
694 return 5 + (plen + 7) / 8;
695
696 trunc:
697 return -2;
698 }
699
700 static int
701 decode_labeled_vpn_prefix4(const u_char *pptr, char *buf, u_int buflen)
702 {
703 struct in_addr addr;
704 u_int plen;
705
706 TCHECK(pptr[0]);
707 plen = pptr[0]; /* get prefix length */
708
709 if ((24+64) > plen)
710 return -1;
711
712 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
713
714 if (32 < plen)
715 return -1;
716
717 memset(&addr, 0, sizeof(addr));
718 TCHECK2(pptr[12], (plen + 7) / 8);
719 memcpy(&addr, &pptr[12], (plen + 7) / 8);
720 if (plen % 8) {
721 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
722 ((0xff00 >> (plen % 8)) & 0xff);
723 }
724 /* the label may get offsetted by 4 bits so lets shift it right */
725 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
726 bgp_vpn_rd_print(pptr+4),
727 getname((u_char *)&addr),
728 plen,
729 EXTRACT_24BITS(pptr+1)>>4,
730 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
731
732 return 12 + (plen + 7) / 8;
733
734 trunc:
735 return -2;
736 }
737
738 #define BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI 1
739 #define BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI 2
740 #define BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI 3
741 #define BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF 4
742 #define BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE 5
743 #define BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN 6
744 #define BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN 7
745
746 static struct tok bgp_multicast_vpn_route_type_values[] = {
747 { BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI, "Intra-AS I-PMSI"},
748 { BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI, "Inter-AS I-PMSI"},
749 { BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI, "S-PMSI"},
750 { BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF, "Intra-AS Segment-Leaf"},
751 { BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE, "Source-Active"},
752 { BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN, "Shared Tree Join"},
753 { BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN, "Source Tree Join"},
754 };
755
756 static int
757 decode_multicast_vpn(const u_char *pptr, char *buf, u_int buflen)
758 {
759 u_int8_t route_type, route_length, addr_length, sg_length;
760 u_int offset;
761
762 TCHECK2(pptr[0], 2);
763 route_type = *pptr++;
764 route_length = *pptr++;
765
766 snprintf(buf, buflen, "Route-Type: %s (%u), length: %u",
767 tok2str(bgp_multicast_vpn_route_type_values,
768 "Unknown", route_type),
769 route_type, route_length);
770
771 switch(route_type) {
772 case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI:
773 TCHECK2(pptr[0], BGP_VPN_RD_LEN);
774 offset = strlen(buf);
775 snprintf(buf + offset, buflen - offset, ", RD: %s, Originator %s",
776 bgp_vpn_rd_print(pptr),
777 bgp_vpn_ip_print(pptr + BGP_VPN_RD_LEN,
778 (route_length - BGP_VPN_RD_LEN) << 3));
779 break;
780 case BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI:
781 TCHECK2(pptr[0], BGP_VPN_RD_LEN + 4);
782 offset = strlen(buf);
783 snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %u",
784 bgp_vpn_rd_print(pptr),
785 EXTRACT_32BITS(pptr + BGP_VPN_RD_LEN));
786 break;
787
788 case BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI:
789 TCHECK2(pptr[0], BGP_VPN_RD_LEN);
790 offset = strlen(buf);
791 snprintf(buf + offset, buflen - offset, ", RD: %s",
792 bgp_vpn_rd_print(pptr));
793 pptr += BGP_VPN_RD_LEN;
794
795 sg_length = bgp_vpn_sg_print(pptr, buf, buflen);
796 addr_length = route_length - sg_length;
797
798 TCHECK2(pptr[0], addr_length);
799 offset = strlen(buf);
800 snprintf(buf + offset, buflen - offset, ", Originator %s",
801 bgp_vpn_ip_print(pptr, addr_length << 3));
802 break;
803
804 case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE:
805 TCHECK2(pptr[0], BGP_VPN_RD_LEN);
806 offset = strlen(buf);
807 snprintf(buf + offset, buflen - offset, ", RD: %s",
808 bgp_vpn_rd_print(pptr));
809 pptr += BGP_VPN_RD_LEN;
810
811 bgp_vpn_sg_print(pptr, buf, buflen);
812 break;
813
814 case BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN: /* fall through */
815 case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN:
816 TCHECK2(pptr[0], BGP_VPN_RD_LEN);
817 offset = strlen(buf);
818 snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %u",
819 bgp_vpn_rd_print(pptr),
820 EXTRACT_32BITS(pptr + BGP_VPN_RD_LEN));
821 pptr += BGP_VPN_RD_LEN;
822
823 bgp_vpn_sg_print(pptr, buf, buflen);
824 break;
825
826 /*
827 * no per route-type printing yet.
828 */
829 case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF:
830 default:
831 break;
832 }
833
834 return route_length + 2;
835
836 trunc:
837 return -2;
838 }
839
840 /*
841 * As I remember, some versions of systems have an snprintf() that
842 * returns -1 if the buffer would have overflowed. If the return
843 * value is negative, set buflen to 0, to indicate that we've filled
844 * the buffer up.
845 *
846 * If the return value is greater than buflen, that means that
847 * the buffer would have overflowed; again, set buflen to 0 in
848 * that case.
849 */
850 #define UPDATE_BUF_BUFLEN(buf, buflen, strlen) \
851 if (strlen<0) \
852 buflen=0; \
853 else if ((u_int)strlen>buflen) \
854 buflen=0; \
855 else { \
856 buflen-=strlen; \
857 buf+=strlen; \
858 }
859
860 static int
861 decode_labeled_vpn_l2(const u_char *pptr, char *buf, u_int buflen)
862 {
863 int plen,tlen,strlen,tlv_type,tlv_len,ttlv_len;
864
865 TCHECK2(pptr[0], 2);
866 plen=EXTRACT_16BITS(pptr);
867 tlen=plen;
868 pptr+=2;
869 TCHECK2(pptr[0],15);
870 buf[0]='\0';
871 strlen=snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u",
872 bgp_vpn_rd_print(pptr),
873 EXTRACT_16BITS(pptr+8),
874 EXTRACT_16BITS(pptr+10),
875 EXTRACT_24BITS(pptr+12)>>4); /* the label is offsetted by 4 bits so lets shift it right */
876 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
877 pptr+=15;
878 tlen-=15;
879
880 /* ok now the variable part - lets read out TLVs*/
881 while (tlen>0) {
882 if (tlen < 3)
883 return -1;
884 TCHECK2(pptr[0], 3);
885 tlv_type=*pptr++;
886 tlv_len=EXTRACT_16BITS(pptr);
887 ttlv_len=tlv_len;
888 pptr+=2;
889
890 switch(tlv_type) {
891 case 1:
892 if (buflen!=0) {
893 strlen=snprintf(buf,buflen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
894 tlv_type,
895 tlv_len);
896 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
897 }
898 ttlv_len=ttlv_len/8+1; /* how many bytes do we need to read ? */
899 while (ttlv_len>0) {
900 TCHECK(pptr[0]);
901 if (buflen!=0) {
902 strlen=snprintf(buf,buflen, "%02x",*pptr++);
903 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
904 }
905 ttlv_len--;
906 }
907 break;
908 default:
909 if (buflen!=0) {
910 strlen=snprintf(buf,buflen, "\n\t\tunknown TLV #%u, length: %u",
911 tlv_type,
912 tlv_len);
913 UPDATE_BUF_BUFLEN(buf, buflen, strlen);
914 }
915 break;
916 }
917 tlen-=(tlv_len<<3); /* the tlv-length is expressed in bits so lets shift it right */
918 }
919 return plen+2;
920
921 trunc:
922 return -2;
923 }
924
925 #ifdef INET6
926 int
927 decode_prefix6(const u_char *pd, char *buf, u_int buflen)
928 {
929 struct in6_addr addr;
930 u_int plen;
931
932 TCHECK(pd[0]);
933 plen = pd[0];
934 if (128 < plen)
935 return -1;
936
937 memset(&addr, 0, sizeof(addr));
938 TCHECK2(pd[1], (plen + 7) / 8);
939 memcpy(&addr, &pd[1], (plen + 7) / 8);
940 if (plen % 8) {
941 addr.s6_addr[(plen + 7) / 8 - 1] &=
942 ((0xff00 >> (plen % 8)) & 0xff);
943 }
944 snprintf(buf, buflen, "%s/%d", getname6((u_char *)&addr), plen);
945 return 1 + (plen + 7) / 8;
946
947 trunc:
948 return -2;
949 }
950
951 static int
952 decode_labeled_prefix6(const u_char *pptr, char *buf, u_int buflen)
953 {
954 struct in6_addr addr;
955 u_int plen;
956
957 TCHECK(pptr[0]);
958 plen = pptr[0]; /* get prefix length */
959
960 if (24 > plen)
961 return -1;
962
963 plen-=24; /* adjust prefixlen - labellength */
964
965 if (128 < plen)
966 return -1;
967
968 memset(&addr, 0, sizeof(addr));
969 TCHECK2(pptr[4], (plen + 7) / 8);
970 memcpy(&addr, &pptr[4], (plen + 7) / 8);
971 if (plen % 8) {
972 addr.s6_addr[(plen + 7) / 8 - 1] &=
973 ((0xff00 >> (plen % 8)) & 0xff);
974 }
975 /* the label may get offsetted by 4 bits so lets shift it right */
976 snprintf(buf, buflen, "%s/%d, label:%u %s",
977 getname6((u_char *)&addr),
978 plen,
979 EXTRACT_24BITS(pptr+1)>>4,
980 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
981
982 return 4 + (plen + 7) / 8;
983
984 trunc:
985 return -2;
986 }
987
988 static int
989 decode_labeled_vpn_prefix6(const u_char *pptr, char *buf, u_int buflen)
990 {
991 struct in6_addr addr;
992 u_int plen;
993
994 TCHECK(pptr[0]);
995 plen = pptr[0]; /* get prefix length */
996
997 if ((24+64) > plen)
998 return -1;
999
1000 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
1001
1002 if (128 < plen)
1003 return -1;
1004
1005 memset(&addr, 0, sizeof(addr));
1006 TCHECK2(pptr[12], (plen + 7) / 8);
1007 memcpy(&addr, &pptr[12], (plen + 7) / 8);
1008 if (plen % 8) {
1009 addr.s6_addr[(plen + 7) / 8 - 1] &=
1010 ((0xff00 >> (plen % 8)) & 0xff);
1011 }
1012 /* the label may get offsetted by 4 bits so lets shift it right */
1013 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
1014 bgp_vpn_rd_print(pptr+4),
1015 getname6((u_char *)&addr),
1016 plen,
1017 EXTRACT_24BITS(pptr+1)>>4,
1018 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
1019
1020 return 12 + (plen + 7) / 8;
1021
1022 trunc:
1023 return -2;
1024 }
1025 #endif
1026
1027 static int
1028 decode_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
1029 {
1030 u_int8_t addr[19];
1031 u_int plen;
1032
1033 TCHECK(pptr[0]);
1034 plen = pptr[0]; /* get prefix length */
1035
1036 if (152 < plen)
1037 return -1;
1038
1039 memset(&addr, 0, sizeof(addr));
1040 TCHECK2(pptr[4], (plen + 7) / 8);
1041 memcpy(&addr, &pptr[4], (plen + 7) / 8);
1042 if (plen % 8) {
1043 addr[(plen + 7) / 8 - 1] &=
1044 ((0xff00 >> (plen % 8)) & 0xff);
1045 }
1046 snprintf(buf, buflen, "%s/%d",
1047 isonsap_string(addr,(plen + 7) / 8),
1048 plen);
1049
1050 return 1 + (plen + 7) / 8;
1051
1052 trunc:
1053 return -2;
1054 }
1055
1056 static int
1057 decode_labeled_vpn_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
1058 {
1059 u_int8_t addr[19];
1060 u_int plen;
1061
1062 TCHECK(pptr[0]);
1063 plen = pptr[0]; /* get prefix length */
1064
1065 if ((24+64) > plen)
1066 return -1;
1067
1068 plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
1069
1070 if (152 < plen)
1071 return -1;
1072
1073 memset(&addr, 0, sizeof(addr));
1074 TCHECK2(pptr[12], (plen + 7) / 8);
1075 memcpy(&addr, &pptr[12], (plen + 7) / 8);
1076 if (plen % 8) {
1077 addr[(plen + 7) / 8 - 1] &=
1078 ((0xff00 >> (plen % 8)) & 0xff);
1079 }
1080 /* the label may get offsetted by 4 bits so lets shift it right */
1081 snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
1082 bgp_vpn_rd_print(pptr+4),
1083 isonsap_string(addr,(plen + 7) / 8),
1084 plen,
1085 EXTRACT_24BITS(pptr+1)>>4,
1086 ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
1087
1088 return 12 + (plen + 7) / 8;
1089
1090 trunc:
1091 return -2;
1092 }
1093
1094 static int
1095 bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len)
1096 {
1097 int i;
1098 u_int16_t af;
1099 u_int8_t safi, snpa, nhlen;
1100 union { /* copy buffer for bandwidth values */
1101 float f;
1102 u_int32_t i;
1103 } bw;
1104 int advance;
1105 int tlen;
1106 const u_char *tptr;
1107 char buf[MAXHOSTNAMELEN + 100];
1108 char tokbuf[TOKBUFSIZE];
1109
1110 tptr = pptr;
1111 tlen=len;
1112
1113 switch (attr->bgpa_type) {
1114 case BGPTYPE_ORIGIN:
1115 if (len != 1)
1116 printf("invalid len");
1117 else {
1118 TCHECK(*tptr);
1119 printf("%s", tok2strbuf(bgp_origin_values,
1120 "Unknown Origin Typecode",
1121 tptr[0],
1122 tokbuf, sizeof(tokbuf)));
1123 }
1124 break;
1125
1126 case BGPTYPE_AS_PATH:
1127 if (len % 2) {
1128 printf("invalid len");
1129 break;
1130 }
1131 if (!len) {
1132 printf("empty");
1133 break;
1134 }
1135
1136 while (tptr < pptr + len) {
1137 TCHECK(tptr[0]);
1138 printf("%s", tok2strbuf(bgp_as_path_segment_open_values,
1139 "?", tptr[0],
1140 tokbuf, sizeof(tokbuf)));
1141 for (i = 0; i < tptr[1] * 2; i += 2) {
1142 TCHECK2(tptr[2 + i], 2);
1143 printf("%u ", EXTRACT_16BITS(&tptr[2 + i]));
1144 }
1145 TCHECK(tptr[0]);
1146 printf("%s", tok2strbuf(bgp_as_path_segment_close_values,
1147 "?", tptr[0],
1148 tokbuf, sizeof(tokbuf)));
1149 TCHECK(tptr[1]);
1150 tptr += 2 + tptr[1] * 2;
1151 }
1152 break;
1153 case BGPTYPE_NEXT_HOP:
1154 if (len != 4)
1155 printf("invalid len");
1156 else {
1157 TCHECK2(tptr[0], 4);
1158 printf("%s", getname(tptr));
1159 }
1160 break;
1161 case BGPTYPE_MULTI_EXIT_DISC:
1162 case BGPTYPE_LOCAL_PREF:
1163 if (len != 4)
1164 printf("invalid len");
1165 else {
1166 TCHECK2(tptr[0], 4);
1167 printf("%u", EXTRACT_32BITS(tptr));
1168 }
1169 break;
1170 case BGPTYPE_ATOMIC_AGGREGATE:
1171 if (len != 0)
1172 printf("invalid len");
1173 break;
1174 case BGPTYPE_AGGREGATOR:
1175 if (len != 6) {
1176 printf("invalid len");
1177 break;
1178 }
1179 TCHECK2(tptr[0], 6);
1180 printf(" AS #%u, origin %s", EXTRACT_16BITS(tptr),
1181 getname(tptr + 2));
1182 break;
1183 case BGPTYPE_COMMUNITIES:
1184 if (len % 4) {
1185 printf("invalid len");
1186 break;
1187 }
1188 while (tlen>0) {
1189 u_int32_t comm;
1190 TCHECK2(tptr[0], 4);
1191 comm = EXTRACT_32BITS(tptr);
1192 switch (comm) {
1193 case BGP_COMMUNITY_NO_EXPORT:
1194 printf(" NO_EXPORT");
1195 break;
1196 case BGP_COMMUNITY_NO_ADVERT:
1197 printf(" NO_ADVERTISE");
1198 break;
1199 case BGP_COMMUNITY_NO_EXPORT_SUBCONFED:
1200 printf(" NO_EXPORT_SUBCONFED");
1201 break;
1202 default:
1203 printf("%u:%u%s",
1204 (comm >> 16) & 0xffff,
1205 comm & 0xffff,
1206 (tlen>4) ? ", " : "");
1207 break;
1208 }
1209 tlen -=4;
1210 tptr +=4;
1211 }
1212 break;
1213 case BGPTYPE_ORIGINATOR_ID:
1214 if (len != 4) {
1215 printf("invalid len");
1216 break;
1217 }
1218 TCHECK2(tptr[0], 4);
1219 printf("%s",getname(tptr));
1220 break;
1221 case BGPTYPE_CLUSTER_LIST:
1222 if (len % 4) {
1223 printf("invalid len");
1224 break;
1225 }
1226 while (tlen>0) {
1227 TCHECK2(tptr[0], 4);
1228 printf("%s%s",
1229 getname(tptr),
1230 (tlen>4) ? ", " : "");
1231 tlen -=4;
1232 tptr +=4;
1233 }
1234 break;
1235 case BGPTYPE_MP_REACH_NLRI:
1236 TCHECK2(tptr[0], 3);
1237 af = EXTRACT_16BITS(tptr);
1238 safi = tptr[2];
1239
1240 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1241 tok2strbuf(af_values, "Unknown AFI", af,
1242 tokbuf, sizeof(tokbuf)),
1243 af,
1244 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1245 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1246 tokbuf, sizeof(tokbuf)),
1247 safi);
1248
1249 switch(af<<8 | safi) {
1250 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1251 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1252 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1253 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1254 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1255 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1256 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1257 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1258 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN):
1259 #ifdef INET6
1260 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1261 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1262 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1263 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1264 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1265 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1266 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1267 #endif
1268 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1269 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1270 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1271 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1272 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1273 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1274 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1275 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1276 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1277 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1278 break;
1279 default:
1280 TCHECK2(tptr[0], tlen);
1281 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1282 if (vflag <= 1)
1283 print_unknown_data(tptr,"\n\t ",tlen);
1284 goto done;
1285 break;
1286 }
1287
1288 tptr +=3;
1289
1290 TCHECK(tptr[0]);
1291 nhlen = tptr[0];
1292 tlen = nhlen;
1293 tptr++;
1294
1295 if (tlen) {
1296 printf("\n\t nexthop: ");
1297 while (tlen > 0) {
1298 switch(af<<8 | safi) {
1299 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1300 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1301 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1302 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1303 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1304 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN):
1305 if (tlen < (int)sizeof(struct in_addr)) {
1306 printf("invalid len");
1307 tlen = 0;
1308 } else {
1309 TCHECK2(tptr[0], sizeof(struct in_addr));
1310 printf("%s",getname(tptr));
1311 tlen -= sizeof(struct in_addr);
1312 tptr += sizeof(struct in_addr);
1313 }
1314 break;
1315 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1316 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1317 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1318 if (tlen < (int)(sizeof(struct in_addr)+BGP_VPN_RD_LEN)) {
1319 printf("invalid len");
1320 tlen = 0;
1321 } else {
1322 TCHECK2(tptr[0], sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1323 printf("RD: %s, %s",
1324 bgp_vpn_rd_print(tptr),
1325 getname(tptr+BGP_VPN_RD_LEN));
1326 tlen -= (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1327 tptr += (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1328 }
1329 break;
1330 #ifdef INET6
1331 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1332 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1333 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1334 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1335 if (tlen < (int)sizeof(struct in6_addr)) {
1336 printf("invalid len");
1337 tlen = 0;
1338 } else {
1339 TCHECK2(tptr[0], sizeof(struct in6_addr));
1340 printf("%s", getname6(tptr));
1341 tlen -= sizeof(struct in6_addr);
1342 tptr += sizeof(struct in6_addr);
1343 }
1344 break;
1345 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1346 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1347 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1348 if (tlen < (int)(sizeof(struct in6_addr)+BGP_VPN_RD_LEN)) {
1349 printf("invalid len");
1350 tlen = 0;
1351 } else {
1352 TCHECK2(tptr[0], sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1353 printf("RD: %s, %s",
1354 bgp_vpn_rd_print(tptr),
1355 getname6(tptr+BGP_VPN_RD_LEN));
1356 tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1357 tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1358 }
1359 break;
1360 #endif
1361 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1362 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1363 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1364 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1365 if (tlen < (int)sizeof(struct in_addr)) {
1366 printf("invalid len");
1367 tlen = 0;
1368 } else {
1369 TCHECK2(tptr[0], sizeof(struct in_addr));
1370 printf("%s", getname(tptr));
1371 tlen -= (sizeof(struct in_addr));
1372 tptr += (sizeof(struct in_addr));
1373 }
1374 break;
1375 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1376 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1377 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1378 TCHECK2(tptr[0], tlen);
1379 printf("%s",isonsap_string(tptr,tlen));
1380 tptr += tlen;
1381 tlen = 0;
1382 break;
1383
1384 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1385 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1386 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1387 if (tlen < BGP_VPN_RD_LEN+1) {
1388 printf("invalid len");
1389 tlen = 0;
1390 } else {
1391 TCHECK2(tptr[0], tlen);
1392 printf("RD: %s, %s",
1393 bgp_vpn_rd_print(tptr),
1394 isonsap_string(tptr+BGP_VPN_RD_LEN,tlen-BGP_VPN_RD_LEN));
1395 /* rfc986 mapped IPv4 address ? */
1396 if (EXTRACT_32BITS(tptr+BGP_VPN_RD_LEN) == 0x47000601)
1397 printf(" = %s", getname(tptr+BGP_VPN_RD_LEN+4));
1398 #ifdef INET6
1399 /* rfc1888 mapped IPv6 address ? */
1400 else if (EXTRACT_24BITS(tptr+BGP_VPN_RD_LEN) == 0x350000)
1401 printf(" = %s", getname6(tptr+BGP_VPN_RD_LEN+3));
1402 #endif
1403 tptr += tlen;
1404 tlen = 0;
1405 }
1406 break;
1407 default:
1408 TCHECK2(tptr[0], tlen);
1409 printf("no AFI %u/SAFI %u decoder",af,safi);
1410 if (vflag <= 1)
1411 print_unknown_data(tptr,"\n\t ",tlen);
1412 tptr += tlen;
1413 tlen = 0;
1414 goto done;
1415 break;
1416 }
1417 }
1418 }
1419 printf(", nh-length: %u", nhlen);
1420 tptr += tlen;
1421
1422 TCHECK(tptr[0]);
1423 snpa = tptr[0];
1424 tptr++;
1425
1426 if (snpa) {
1427 printf("\n\t %u SNPA", snpa);
1428 for (/*nothing*/; snpa > 0; snpa--) {
1429 TCHECK(tptr[0]);
1430 printf("\n\t %d bytes", tptr[0]);
1431 tptr += tptr[0] + 1;
1432 }
1433 } else {
1434 printf(", no SNPA");
1435 }
1436
1437 while (len - (tptr - pptr) > 0) {
1438 switch (af<<8 | safi) {
1439 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1440 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1441 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1442 advance = decode_prefix4(tptr, buf, sizeof(buf));
1443 if (advance == -1)
1444 printf("\n\t (illegal prefix length)");
1445 else if (advance == -2)
1446 goto trunc;
1447 else
1448 printf("\n\t %s", buf);
1449 break;
1450 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1451 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1452 if (advance == -1)
1453 printf("\n\t (illegal prefix length)");
1454 else if (advance == -2)
1455 goto trunc;
1456 else
1457 printf("\n\t %s", buf);
1458 break;
1459 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1460 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1461 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1462 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1463 if (advance == -1)
1464 printf("\n\t (illegal prefix length)");
1465 else if (advance == -2)
1466 goto trunc;
1467 else
1468 printf("\n\t %s", buf);
1469 break;
1470 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1471 advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1472 if (advance == -1)
1473 printf("\n\t (illegal prefix length)");
1474 else if (advance == -2)
1475 goto trunc;
1476 else
1477 printf("\n\t %s", buf);
1478 break;
1479 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */
1480 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN):
1481 advance = decode_multicast_vpn(tptr, buf, sizeof(buf));
1482 if (advance == -1)
1483 printf("\n\t (illegal prefix length)");
1484 else if (advance == -2)
1485 goto trunc;
1486 else
1487 printf("\n\t %s", buf);
1488 break;
1489 #ifdef INET6
1490 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1491 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1492 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1493 advance = decode_prefix6(tptr, buf, sizeof(buf));
1494 if (advance == -1)
1495 printf("\n\t (illegal prefix length)");
1496 else if (advance == -2)
1497 goto trunc;
1498 else
1499 printf("\n\t %s", buf);
1500 break;
1501 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1502 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1503 if (advance == -1)
1504 printf("\n\t (illegal prefix length)");
1505 else if (advance == -2)
1506 goto trunc;
1507 else
1508 printf("\n\t %s", buf);
1509 break;
1510 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1511 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1512 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1513 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1514 if (advance == -1)
1515 printf("\n\t (illegal prefix length)");
1516 else if (advance == -2)
1517 goto trunc;
1518 else
1519 printf("\n\t %s", buf);
1520 break;
1521 #endif
1522 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1523 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1524 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1525 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1526 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1527 if (advance == -1)
1528 printf("\n\t (illegal length)");
1529 else if (advance == -2)
1530 goto trunc;
1531 else
1532 printf("\n\t %s", buf);
1533 break;
1534 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1535 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1536 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1537 advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1538 if (advance == -1)
1539 printf("\n\t (illegal prefix length)");
1540 else if (advance == -2)
1541 goto trunc;
1542 else
1543 printf("\n\t %s", buf);
1544 break;
1545 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1546 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1547 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1548 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1549 if (advance == -1)
1550 printf("\n\t (illegal prefix length)");
1551 else if (advance == -2)
1552 goto trunc;
1553 else
1554 printf("\n\t %s", buf);
1555 break;
1556 default:
1557 TCHECK2(*tptr,tlen);
1558 printf("\n\t no AFI %u / SAFI %u decoder",af,safi);
1559 if (vflag <= 1)
1560 print_unknown_data(tptr,"\n\t ",tlen);
1561 advance = 0;
1562 tptr = pptr + len;
1563 break;
1564 }
1565 if (advance < 0)
1566 break;
1567 tptr += advance;
1568 }
1569 done:
1570 break;
1571
1572 case BGPTYPE_MP_UNREACH_NLRI:
1573 TCHECK2(tptr[0], BGP_MP_NLRI_MINSIZE);
1574 af = EXTRACT_16BITS(tptr);
1575 safi = tptr[2];
1576
1577 printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
1578 tok2strbuf(af_values, "Unknown AFI", af,
1579 tokbuf, sizeof(tokbuf)),
1580 af,
1581 (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1582 tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1583 tokbuf, sizeof(tokbuf)),
1584 safi);
1585
1586 if (len == BGP_MP_NLRI_MINSIZE)
1587 printf("\n\t End-of-Rib Marker (empty NLRI)");
1588
1589 tptr += 3;
1590
1591 while (len - (tptr - pptr) > 0) {
1592 switch (af<<8 | safi) {
1593 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1594 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1595 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1596 advance = decode_prefix4(tptr, buf, sizeof(buf));
1597 if (advance == -1)
1598 printf("\n\t (illegal prefix length)");
1599 else if (advance == -2)
1600 goto trunc;
1601 else
1602 printf("\n\t %s", buf);
1603 break;
1604 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1605 advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1606 if (advance == -1)
1607 printf("\n\t (illegal prefix length)");
1608 else if (advance == -2)
1609 goto trunc;
1610 else
1611 printf("\n\t %s", buf);
1612 break;
1613 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1614 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1615 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1616 advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1617 if (advance == -1)
1618 printf("\n\t (illegal prefix length)");
1619 else if (advance == -2)
1620 goto trunc;
1621 else
1622 printf("\n\t %s", buf);
1623 break;
1624 #ifdef INET6
1625 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1626 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1627 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1628 advance = decode_prefix6(tptr, buf, sizeof(buf));
1629 if (advance == -1)
1630 printf("\n\t (illegal prefix length)");
1631 else if (advance == -2)
1632 goto trunc;
1633 else
1634 printf("\n\t %s", buf);
1635 break;
1636 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1637 advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1638 if (advance == -1)
1639 printf("\n\t (illegal prefix length)");
1640 else if (advance == -2)
1641 goto trunc;
1642 else
1643 printf("\n\t %s", buf);
1644 break;
1645 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1646 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1647 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1648 advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1649 if (advance == -1)
1650 printf("\n\t (illegal prefix length)");
1651 else if (advance == -2)
1652 goto trunc;
1653 else
1654 printf("\n\t %s", buf);
1655 break;
1656 #endif
1657 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1658 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1659 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1660 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1661 advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1662 if (advance == -1)
1663 printf("\n\t (illegal length)");
1664 else if (advance == -2)
1665 goto trunc;
1666 else
1667 printf("\n\t %s", buf);
1668 break;
1669 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1670 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1671 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1672 advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1673 if (advance == -1)
1674 printf("\n\t (illegal prefix length)");
1675 else if (advance == -2)
1676 goto trunc;
1677 else
1678 printf("\n\t %s", buf);
1679 break;
1680 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1681 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1682 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1683 advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1684 if (advance == -1)
1685 printf("\n\t (illegal prefix length)");
1686 else if (advance == -2)
1687 goto trunc;
1688 else
1689 printf("\n\t %s", buf);
1690 break;
1691 case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */
1692 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN):
1693 advance = decode_multicast_vpn(tptr, buf, sizeof(buf));
1694 if (advance == -1)
1695 printf("\n\t (illegal prefix length)");
1696 else if (advance == -2)
1697 goto trunc;
1698 else
1699 printf("\n\t %s", buf);
1700 break;
1701 default:
1702 TCHECK2(*(tptr-3),tlen);
1703 printf("no AFI %u / SAFI %u decoder",af,safi);
1704 if (vflag <= 1)
1705 print_unknown_data(tptr-3,"\n\t ",tlen);
1706 advance = 0;
1707 tptr = pptr + len;
1708 break;
1709 }
1710 if (advance < 0)
1711 break;
1712 tptr += advance;
1713 }
1714 break;
1715 case BGPTYPE_EXTD_COMMUNITIES:
1716 if (len % 8) {
1717 printf("invalid len");
1718 break;
1719 }
1720 while (tlen>0) {
1721 u_int16_t extd_comm;
1722
1723 TCHECK2(tptr[0], 2);
1724 extd_comm=EXTRACT_16BITS(tptr);
1725
1726 printf("\n\t %s (0x%04x), Flags [%s]",
1727 tok2strbuf(bgp_extd_comm_subtype_values,
1728 "unknown extd community typecode",
1729 extd_comm, tokbuf, sizeof(tokbuf)),
1730 extd_comm,
1731 bittok2str(bgp_extd_comm_flag_values, "none", extd_comm));
1732
1733 TCHECK2(*(tptr+2), 6);
1734 switch(extd_comm) {
1735 case BGP_EXT_COM_RT_0:
1736 case BGP_EXT_COM_RO_0:
1737 printf(": %u:%s",
1738 EXTRACT_16BITS(tptr+2),
1739 getname(tptr+4));
1740 break;
1741 case BGP_EXT_COM_RT_1:
1742 case BGP_EXT_COM_RO_1:
1743 case BGP_EXT_COM_VRF_RT_IMP:
1744 printf(": %s:%u",
1745 getname(tptr+2),
1746 EXTRACT_16BITS(tptr+6));
1747 break;
1748 case BGP_EXT_COM_RT_2:
1749 case BGP_EXT_COM_RO_2:
1750 printf(": %u:%u",
1751 EXTRACT_32BITS(tptr+2),
1752 EXTRACT_16BITS(tptr+6));
1753 break;
1754 case BGP_EXT_COM_LINKBAND:
1755 bw.i = EXTRACT_32BITS(tptr+2);
1756 printf(": bandwidth: %.3f Mbps",
1757 bw.f*8/1000000);
1758 break;
1759 case BGP_EXT_COM_VPN_ORIGIN:
1760 case BGP_EXT_COM_VPN_ORIGIN2:
1761 case BGP_EXT_COM_VPN_ORIGIN3:
1762 case BGP_EXT_COM_VPN_ORIGIN4:
1763 case BGP_EXT_COM_OSPF_RID:
1764 case BGP_EXT_COM_OSPF_RID2:
1765 printf("%s", getname(tptr+2));
1766 break;
1767 case BGP_EXT_COM_OSPF_RTYPE:
1768 case BGP_EXT_COM_OSPF_RTYPE2:
1769 printf(": area:%s, router-type:%s, metric-type:%s%s",
1770 getname(tptr+2),
1771 tok2strbuf(bgp_extd_comm_ospf_rtype_values,
1772 "unknown (0x%02x)",
1773 *(tptr+6),
1774 tokbuf, sizeof(tokbuf)),
1775 (*(tptr+7) & BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "",
1776 ((*(tptr+6) == BGP_OSPF_RTYPE_EXT) || (*(tptr+6) == BGP_OSPF_RTYPE_NSSA)) ? "E1" : "");
1777 break;
1778 case BGP_EXT_COM_L2INFO:
1779 printf(": %s Control Flags [0x%02x]:MTU %u",
1780 tok2strbuf(l2vpn_encaps_values,
1781 "unknown encaps",
1782 *(tptr+2),
1783 tokbuf, sizeof(tokbuf)),
1784 *(tptr+3),
1785 EXTRACT_16BITS(tptr+4));
1786 break;
1787 case BGP_EXT_COM_SOURCE_AS:
1788 printf(": AS %u", EXTRACT_16BITS(tptr+2));
1789 break;
1790 default:
1791 TCHECK2(*tptr,8);
1792 print_unknown_data(tptr,"\n\t ",8);
1793 break;
1794 }
1795 tlen -=8;
1796 tptr +=8;
1797 }
1798 break;
1799
1800 case BGPTYPE_PMSI_TUNNEL:
1801 {
1802 u_int8_t tunnel_type, flags;
1803
1804 tunnel_type = *(tptr+1);
1805 flags = *tptr;
1806 tlen = len;
1807
1808 TCHECK2(tptr[0], 5);
1809 printf("\n\t Tunnel-type %s (%u), Flags [%s], MPLS Label %u",
1810 tok2str(bgp_pmsi_tunnel_values, "Unknown", tunnel_type),
1811 tunnel_type,
1812 bittok2str(bgp_pmsi_flag_values, "none", flags),
1813 EXTRACT_24BITS(tptr+2)>>4);
1814
1815 tptr +=5;
1816 tlen -= 5;
1817
1818 switch (tunnel_type) {
1819 case BGP_PMSI_TUNNEL_PIM_SM: /* fall through */
1820 case BGP_PMSI_TUNNEL_PIM_BIDIR:
1821 TCHECK2(tptr[0], 8);
1822 printf("\n\t Sender %s, P-Group %s",
1823 ipaddr_string(tptr),
1824 ipaddr_string(tptr+4));
1825 break;
1826
1827 case BGP_PMSI_TUNNEL_PIM_SSM:
1828 TCHECK2(tptr[0], 8);
1829 printf("\n\t Root-Node %s, P-Group %s",
1830 ipaddr_string(tptr),
1831 ipaddr_string(tptr+4));
1832 break;
1833 case BGP_PMSI_TUNNEL_INGRESS:
1834 TCHECK2(tptr[0], 4);
1835 printf("\n\t Tunnel-Endpoint %s",
1836 ipaddr_string(tptr));
1837 break;
1838 case BGP_PMSI_TUNNEL_LDP_P2MP: /* fall through */
1839 case BGP_PMSI_TUNNEL_LDP_MP2MP:
1840 TCHECK2(tptr[0], 8);
1841 printf("\n\t Root-Node %s, LSP-ID 0x%08x",
1842 ipaddr_string(tptr),
1843 EXTRACT_32BITS(tptr+4));
1844 break;
1845 case BGP_PMSI_TUNNEL_RSVP_P2MP:
1846 TCHECK2(tptr[0], 8);
1847 printf("\n\t Extended-Tunnel-ID %s, P2MP-ID 0x%08x",
1848 ipaddr_string(tptr),
1849 EXTRACT_32BITS(tptr+4));
1850 break;
1851 default:
1852 if (vflag <= 1) {
1853 print_unknown_data(tptr,"\n\t ",tlen);
1854 }
1855 }
1856 break;
1857 }
1858 case BGPTYPE_ATTR_SET:
1859 TCHECK2(tptr[0], 4);
1860 printf("\n\t Origin AS: %u", EXTRACT_32BITS(tptr));
1861 tptr+=4;
1862 len -=4;
1863
1864 while (len >= 2 ) {
1865 int alen;
1866 struct bgp_attr bgpa;
1867
1868 TCHECK2(tptr[0], sizeof(bgpa));
1869 memcpy(&bgpa, tptr, sizeof(bgpa));
1870 alen = bgp_attr_len(&bgpa);
1871 tptr += bgp_attr_off(&bgpa);
1872 len -= bgp_attr_off(&bgpa);
1873
1874 printf("\n\t %s (%u), length: %u",
1875 tok2strbuf(bgp_attr_values,
1876 "Unknown Attribute", bgpa.bgpa_type,
1877 tokbuf, sizeof(tokbuf)),
1878 bgpa.bgpa_type,
1879 alen);
1880
1881 if (bgpa.bgpa_flags) {
1882 printf(", Flags [%s%s%s%s",
1883 bgpa.bgpa_flags & 0x80 ? "O" : "",
1884 bgpa.bgpa_flags & 0x40 ? "T" : "",
1885 bgpa.bgpa_flags & 0x20 ? "P" : "",
1886 bgpa.bgpa_flags & 0x10 ? "E" : "");
1887 if (bgpa.bgpa_flags & 0xf)
1888 printf("+%x", bgpa.bgpa_flags & 0xf);
1889 printf("]: ");
1890 }
1891 /* FIXME check for recursion */
1892 if (!bgp_attr_print(&bgpa, tptr, alen))
1893 return 0;
1894 tptr += alen;
1895 len -= alen;
1896 }
1897 break;
1898
1899
1900 default:
1901 TCHECK2(*pptr,len);
1902 printf("\n\t no Attribute %u decoder",attr->bgpa_type); /* we have no decoder for the attribute */
1903 if (vflag <= 1)
1904 print_unknown_data(pptr,"\n\t ",len);
1905 break;
1906 }
1907 if (vflag > 1 && len) { /* omit zero length attributes*/
1908 TCHECK2(*pptr,len);
1909 print_unknown_data(pptr,"\n\t ",len);
1910 }
1911 return 1;
1912
1913 trunc:
1914 return 0;
1915 }
1916
1917 static void
1918 bgp_open_print(const u_char *dat, int length)
1919 {
1920 struct bgp_open bgpo;
1921 struct bgp_opt bgpopt;
1922 const u_char *opt;
1923 int i,cap_type,cap_len,tcap_len,cap_offset;
1924 char tokbuf[TOKBUFSIZE];
1925 char tokbuf2[TOKBUFSIZE];
1926
1927 TCHECK2(dat[0], BGP_OPEN_SIZE);
1928 memcpy(&bgpo, dat, BGP_OPEN_SIZE);
1929
1930 printf("\n\t Version %d, ", bgpo.bgpo_version);
1931 printf("my AS %u, ", ntohs(bgpo.bgpo_myas));
1932 printf("Holdtime %us, ", ntohs(bgpo.bgpo_holdtime));
1933 printf("ID %s", getname((u_char *)&bgpo.bgpo_id));
1934 printf("\n\t Optional parameters, length: %u", bgpo.bgpo_optlen);
1935
1936 /* some little sanity checking */
1937 if (length < bgpo.bgpo_optlen+BGP_OPEN_SIZE)
1938 return;
1939
1940 /* ugly! */
1941 opt = &((const struct bgp_open *)dat)->bgpo_optlen;
1942 opt++;
1943
1944 i = 0;
1945 while (i < bgpo.bgpo_optlen) {
1946 TCHECK2(opt[i], BGP_OPT_SIZE);
1947 memcpy(&bgpopt, &opt[i], BGP_OPT_SIZE);
1948 if (i + 2 + bgpopt.bgpopt_len > bgpo.bgpo_optlen) {
1949 printf("\n\t Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len);
1950 break;
1951 }
1952
1953 printf("\n\t Option %s (%u), length: %u",
1954 tok2strbuf(bgp_opt_values,"Unknown",
1955 bgpopt.bgpopt_type,
1956 tokbuf, sizeof(tokbuf)),
1957 bgpopt.bgpopt_type,
1958 bgpopt.bgpopt_len);
1959
1960 /* now lets decode the options we know*/
1961 switch(bgpopt.bgpopt_type) {
1962 case BGP_OPT_CAP:
1963 cap_type=opt[i+BGP_OPT_SIZE];
1964 cap_len=opt[i+BGP_OPT_SIZE+1];
1965 tcap_len=cap_len;
1966 printf("\n\t %s (%u), length: %u",
1967 tok2strbuf(bgp_capcode_values, "Unknown",
1968 cap_type, tokbuf, sizeof(tokbuf)),
1969 cap_type,
1970 cap_len);
1971 switch(cap_type) {
1972 case BGP_CAPCODE_MP:
1973 printf("\n\t\tAFI %s (%u), SAFI %s (%u)",
1974 tok2strbuf(af_values, "Unknown",
1975 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1976 tokbuf, sizeof(tokbuf)),
1977 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1978 tok2strbuf(bgp_safi_values, "Unknown",
1979 opt[i+BGP_OPT_SIZE+5],
1980 tokbuf, sizeof(tokbuf)),
1981 opt[i+BGP_OPT_SIZE+5]);
1982 break;
1983 case BGP_CAPCODE_RESTART:
1984 printf("\n\t\tRestart Flags: [%s], Restart Time %us",
1985 ((opt[i+BGP_OPT_SIZE+2])&0x80) ? "R" : "none",
1986 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2)&0xfff);
1987 tcap_len-=2;
1988 cap_offset=4;
1989 while(tcap_len>=4) {
1990 printf("\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s",
1991 tok2strbuf(af_values,"Unknown",
1992 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1993 tokbuf, sizeof(tokbuf)),
1994 EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1995 tok2strbuf(bgp_safi_values,"Unknown",
1996 opt[i+BGP_OPT_SIZE+cap_offset+2],
1997 tokbuf2, sizeof(tokbuf2)),
1998 opt[i+BGP_OPT_SIZE+cap_offset+2],
1999 ((opt[i+BGP_OPT_SIZE+cap_offset+3])&0x80) ? "yes" : "no" );
2000 tcap_len-=4;
2001 cap_offset+=4;
2002 }
2003 break;
2004 case BGP_CAPCODE_RR:
2005 case BGP_CAPCODE_RR_CISCO:
2006 break;
2007 default:
2008 TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
2009 printf("\n\t\tno decoder for Capability %u",
2010 cap_type);
2011 if (vflag <= 1)
2012 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
2013 break;
2014 }
2015 if (vflag > 1) {
2016 TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
2017 print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
2018 }
2019 break;
2020 case BGP_OPT_AUTH:
2021 default:
2022 printf("\n\t no decoder for option %u",
2023 bgpopt.bgpopt_type);
2024 break;
2025 }
2026
2027 i += BGP_OPT_SIZE + bgpopt.bgpopt_len;
2028 }
2029 return;
2030 trunc:
2031 printf("[|BGP]");
2032 }
2033
2034 static void
2035 bgp_update_print(const u_char *dat, int length)
2036 {
2037 struct bgp bgp;
2038 struct bgp_attr bgpa;
2039 const u_char *p;
2040 int len;
2041 int i;
2042 char tokbuf[TOKBUFSIZE];
2043
2044 TCHECK2(dat[0], BGP_SIZE);
2045 memcpy(&bgp, dat, BGP_SIZE);
2046 p = dat + BGP_SIZE; /*XXX*/
2047
2048 /* Unfeasible routes */
2049 len = EXTRACT_16BITS(p);
2050 if (len) {
2051 /*
2052 * Without keeping state from the original NLRI message,
2053 * it's not possible to tell if this a v4 or v6 route,
2054 * so only try to decode it if we're not v6 enabled.
2055 */
2056 #ifdef INET6
2057 printf("\n\t Withdrawn routes: %d bytes", len);
2058 #else
2059 char buf[MAXHOSTNAMELEN + 100];
2060 int wpfx;
2061
2062 TCHECK2(p[2], len);
2063 i = 2;
2064
2065 printf("\n\t Withdrawn routes:");
2066
2067 while(i < 2 + len) {
2068 wpfx = decode_prefix4(&p[i], buf, sizeof(buf));
2069 if (wpfx == -1) {
2070 printf("\n\t (illegal prefix length)");
2071 break;
2072 } else if (wpfx == -2)
2073 goto trunc;
2074 else {
2075 i += wpfx;
2076 printf("\n\t %s", buf);
2077 }
2078 }
2079 #endif
2080 }
2081 p += 2 + len;
2082
2083 TCHECK2(p[0], 2);
2084 len = EXTRACT_16BITS(p);
2085
2086 if (len == 0 && length == BGP_UPDATE_MINSIZE) {
2087 printf("\n\t End-of-Rib Marker (empty NLRI)");
2088 return;
2089 }
2090
2091 if (len) {
2092 /* do something more useful!*/
2093 i = 2;
2094 while (i < 2 + len) {
2095 int alen, aoff;
2096
2097 TCHECK2(p[i], sizeof(bgpa));
2098 memcpy(&bgpa, &p[i], sizeof(bgpa));
2099 alen = bgp_attr_len(&bgpa);
2100 aoff = bgp_attr_off(&bgpa);
2101
2102 printf("\n\t %s (%u), length: %u",
2103 tok2strbuf(bgp_attr_values, "Unknown Attribute",
2104 bgpa.bgpa_type,
2105 tokbuf, sizeof(tokbuf)),
2106 bgpa.bgpa_type,
2107 alen);
2108
2109 if (bgpa.bgpa_flags) {
2110 printf(", Flags [%s%s%s%s",
2111 bgpa.bgpa_flags & 0x80 ? "O" : "",
2112 bgpa.bgpa_flags & 0x40 ? "T" : "",
2113 bgpa.bgpa_flags & 0x20 ? "P" : "",
2114 bgpa.bgpa_flags & 0x10 ? "E" : "");
2115 if (bgpa.bgpa_flags & 0xf)
2116 printf("+%x", bgpa.bgpa_flags & 0xf);
2117 printf("]: ");
2118 }
2119 if (!bgp_attr_print(&bgpa, &p[i + aoff], alen))
2120 goto trunc;
2121 i += aoff + alen;
2122 }
2123 }
2124 p += 2 + len;
2125
2126 if (dat + length > p) {
2127 printf("\n\t Updated routes:");
2128 while (dat + length > p) {
2129 char buf[MAXHOSTNAMELEN + 100];
2130 i = decode_prefix4(p, buf, sizeof(buf));
2131 if (i == -1) {
2132 printf("\n\t (illegal prefix length)");
2133 break;
2134 } else if (i == -2)
2135 goto trunc;
2136 else {
2137 printf("\n\t %s", buf);
2138 p += i;
2139 }
2140 }
2141 }
2142 return;
2143 trunc:
2144 printf("[|BGP]");
2145 }
2146
2147 static void
2148 bgp_notification_print(const u_char *dat, int length)
2149 {
2150 struct bgp_notification bgpn;
2151 const u_char *tptr;
2152 char tokbuf[TOKBUFSIZE];
2153 char tokbuf2[TOKBUFSIZE];
2154
2155 TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
2156 memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
2157
2158 /* some little sanity checking */
2159 if (length<BGP_NOTIFICATION_SIZE)
2160 return;
2161
2162 printf(", %s (%u)",
2163 tok2strbuf(bgp_notify_major_values, "Unknown Error",
2164 bgpn.bgpn_major, tokbuf, sizeof(tokbuf)),
2165 bgpn.bgpn_major);
2166
2167 switch (bgpn.bgpn_major) {
2168
2169 case BGP_NOTIFY_MAJOR_MSG:
2170 printf(", subcode %s (%u)",
2171 tok2strbuf(bgp_notify_minor_msg_values, "Unknown",
2172 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2173 bgpn.bgpn_minor);
2174 break;
2175 case BGP_NOTIFY_MAJOR_OPEN:
2176 printf(", subcode %s (%u)",
2177 tok2strbuf(bgp_notify_minor_open_values, "Unknown",
2178 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2179 bgpn.bgpn_minor);
2180 break;
2181 case BGP_NOTIFY_MAJOR_UPDATE:
2182 printf(", subcode %s (%u)",
2183 tok2strbuf(bgp_notify_minor_update_values, "Unknown",
2184 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2185 bgpn.bgpn_minor);
2186 break;
2187 case BGP_NOTIFY_MAJOR_CAP:
2188 printf(" subcode %s (%u)",
2189 tok2strbuf(bgp_notify_minor_cap_values, "Unknown",
2190 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2191 bgpn.bgpn_minor);
2192 case BGP_NOTIFY_MAJOR_CEASE:
2193 printf(", subcode %s (%u)",
2194 tok2strbuf(bgp_notify_minor_cease_values, "Unknown",
2195 bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
2196 bgpn.bgpn_minor);
2197
2198 /* draft-ietf-idr-cease-subcode-02 mentions optionally 7 bytes
2199 * for the maxprefix subtype, which may contain AFI, SAFI and MAXPREFIXES
2200 */
2201 if(bgpn.bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= BGP_NOTIFICATION_SIZE + 7) {
2202 tptr = dat + BGP_NOTIFICATION_SIZE;
2203 TCHECK2(*tptr, 7);
2204 printf(", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
2205 tok2strbuf(af_values, "Unknown",
2206 EXTRACT_16BITS(tptr), tokbuf, sizeof(tokbuf)),
2207 EXTRACT_16BITS(tptr),
2208 tok2strbuf(bgp_safi_values, "Unknown", *(tptr+2),
2209 tokbuf2, sizeof(tokbuf)),
2210 *(tptr+2),
2211 EXTRACT_32BITS(tptr+3));
2212 }
2213 break;
2214 default:
2215 break;
2216 }
2217
2218 return;
2219 trunc:
2220 printf("[|BGP]");
2221 }
2222
2223 static void
2224 bgp_route_refresh_print(const u_char *pptr, int len) {
2225
2226 const struct bgp_route_refresh *bgp_route_refresh_header;
2227 char tokbuf[TOKBUFSIZE];
2228 char tokbuf2[TOKBUFSIZE];
2229
2230 TCHECK2(pptr[0], BGP_ROUTE_REFRESH_SIZE);
2231
2232 /* some little sanity checking */
2233 if (len<BGP_ROUTE_REFRESH_SIZE)
2234 return;
2235
2236 bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
2237
2238 printf("\n\t AFI %s (%u), SAFI %s (%u)",
2239 tok2strbuf(af_values,"Unknown",
2240 /* this stinks but the compiler pads the structure
2241 * weird */
2242 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
2243 tokbuf, sizeof(tokbuf)),
2244 EXTRACT_16BITS(&bgp_route_refresh_header->afi),
2245 tok2strbuf(bgp_safi_values,"Unknown",
2246 bgp_route_refresh_header->safi,
2247 tokbuf2, sizeof(tokbuf2)),
2248 bgp_route_refresh_header->safi);
2249
2250 if (vflag > 1) {
2251 TCHECK2(*pptr, len);
2252 print_unknown_data(pptr,"\n\t ", len);
2253 }
2254
2255 return;
2256 trunc:
2257 printf("[|BGP]");
2258 }
2259
2260 static int
2261 bgp_header_print(const u_char *dat, int length)
2262 {
2263 struct bgp bgp;
2264 char tokbuf[TOKBUFSIZE];
2265
2266 TCHECK2(dat[0], BGP_SIZE);
2267 memcpy(&bgp, dat, BGP_SIZE);
2268 printf("\n\t%s Message (%u), length: %u",
2269 tok2strbuf(bgp_msg_values, "Unknown", bgp.bgp_type,
2270 tokbuf, sizeof(tokbuf)),
2271 bgp.bgp_type,
2272 length);
2273
2274 switch (bgp.bgp_type) {
2275 case BGP_OPEN:
2276 bgp_open_print(dat, length);
2277 break;
2278 case BGP_UPDATE:
2279 bgp_update_print(dat, length);
2280 break;
2281 case BGP_NOTIFICATION:
2282 bgp_notification_print(dat, length);
2283 break;
2284 case BGP_KEEPALIVE:
2285 break;
2286 case BGP_ROUTE_REFRESH:
2287 bgp_route_refresh_print(dat, length);
2288 break;
2289 default:
2290 /* we have no decoder for the BGP message */
2291 TCHECK2(*dat, length);
2292 printf("\n\t no Message %u decoder",bgp.bgp_type);
2293 print_unknown_data(dat,"\n\t ",length);
2294 break;
2295 }
2296 return 1;
2297 trunc:
2298 printf("[|BGP]");
2299 return 0;
2300 }
2301
2302 void
2303 bgp_print(const u_char *dat, int length)
2304 {
2305 const u_char *p;
2306 const u_char *ep;
2307 const u_char *start;
2308 const u_char marker[] = {
2309 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
2310 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
2311 };
2312 struct bgp bgp;
2313 u_int16_t hlen;
2314 char tokbuf[TOKBUFSIZE];
2315
2316 ep = dat + length;
2317 if (snapend < dat + length)
2318 ep = snapend;
2319
2320 printf(": BGP, length: %u",length);
2321
2322 if (vflag < 1) /* lets be less chatty */
2323 return;
2324
2325 p = dat;
2326 start = p;
2327 while (p < ep) {
2328 if (!TTEST2(p[0], 1))
2329 break;
2330 if (p[0] != 0xff) {
2331 p++;
2332 continue;
2333 }
2334
2335 if (!TTEST2(p[0], sizeof(marker)))
2336 break;
2337 if (memcmp(p, marker, sizeof(marker)) != 0) {
2338 p++;
2339 continue;
2340 }
2341
2342 /* found BGP header */
2343 TCHECK2(p[0], BGP_SIZE); /*XXX*/
2344 memcpy(&bgp, p, BGP_SIZE);
2345
2346 if (start != p)
2347 printf(" [|BGP]");
2348
2349 hlen = ntohs(bgp.bgp_len);
2350 if (hlen < BGP_SIZE) {
2351 printf("\n[|BGP Bogus header length %u < %u]", hlen,
2352 BGP_SIZE);
2353 break;
2354 }
2355
2356 if (TTEST2(p[0], hlen)) {
2357 if (!bgp_header_print(p, hlen))
2358 return;
2359 p += hlen;
2360 start = p;
2361 } else {
2362 printf("\n[|BGP %s]",
2363 tok2strbuf(bgp_msg_values,
2364 "Unknown Message Type",
2365 bgp.bgp_type,
2366 tokbuf, sizeof(tokbuf)));
2367 break;
2368 }
2369 }
2370
2371 return;
2372
2373 trunc:
2374 printf(" [|BGP]");
2375 }
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