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Use nd_ types, add EXTRACT_ calls.
[tcpdump] / print-isoclns.c
1 /*
2 * Copyright (c) 1992, 1993, 1994, 1995, 1996
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 *
21 * Original code by Matt Thomas, Digital Equipment Corporation
22 *
23 * Extensively modified by Hannes Gredler (hannes@gredler.at) for more
24 * complete IS-IS & CLNP support.
25 */
26
27 /* \summary: ISO CLNS, ESIS, and ISIS printer */
28
29 /*
30 * specification:
31 *
32 * CLNP: ISO 8473
33 * ES-IS: ISO 9542
34 * IS-IS: ISO 10589
35 */
36
37 #ifdef HAVE_CONFIG_H
38 #include "config.h"
39 #endif
40
41 #include <netdissect-stdinc.h>
42
43 #include <string.h>
44
45 #include "netdissect.h"
46 #include "addrtoname.h"
47 #include "nlpid.h"
48 #include "extract.h"
49 #include "gmpls.h"
50 #include "oui.h"
51 #include "signature.h"
52
53 static const char tstr[] = " [|isis]";
54
55 /*
56 * IS-IS is defined in ISO 10589. Look there for protocol definitions.
57 */
58
59 #define SYSTEM_ID_LEN MAC_ADDR_LEN
60 #define NODE_ID_LEN (SYSTEM_ID_LEN+1)
61 #define LSP_ID_LEN (SYSTEM_ID_LEN+2)
62
63 #define ISIS_VERSION 1
64 #define ESIS_VERSION 1
65 #define CLNP_VERSION 1
66
67 #define ISIS_PDU_TYPE_MASK 0x1F
68 #define ESIS_PDU_TYPE_MASK 0x1F
69 #define CLNP_PDU_TYPE_MASK 0x1F
70 #define CLNP_FLAG_MASK 0xE0
71 #define ISIS_LAN_PRIORITY_MASK 0x7F
72
73 #define ISIS_PDU_L1_LAN_IIH 15
74 #define ISIS_PDU_L2_LAN_IIH 16
75 #define ISIS_PDU_PTP_IIH 17
76 #define ISIS_PDU_L1_LSP 18
77 #define ISIS_PDU_L2_LSP 20
78 #define ISIS_PDU_L1_CSNP 24
79 #define ISIS_PDU_L2_CSNP 25
80 #define ISIS_PDU_L1_PSNP 26
81 #define ISIS_PDU_L2_PSNP 27
82
83 static const struct tok isis_pdu_values[] = {
84 { ISIS_PDU_L1_LAN_IIH, "L1 Lan IIH"},
85 { ISIS_PDU_L2_LAN_IIH, "L2 Lan IIH"},
86 { ISIS_PDU_PTP_IIH, "p2p IIH"},
87 { ISIS_PDU_L1_LSP, "L1 LSP"},
88 { ISIS_PDU_L2_LSP, "L2 LSP"},
89 { ISIS_PDU_L1_CSNP, "L1 CSNP"},
90 { ISIS_PDU_L2_CSNP, "L2 CSNP"},
91 { ISIS_PDU_L1_PSNP, "L1 PSNP"},
92 { ISIS_PDU_L2_PSNP, "L2 PSNP"},
93 { 0, NULL}
94 };
95
96 /*
97 * A TLV is a tuple of a type, length and a value and is normally used for
98 * encoding information in all sorts of places. This is an enumeration of
99 * the well known types.
100 *
101 * list taken from rfc3359 plus some memory from veterans ;-)
102 */
103
104 #define ISIS_TLV_AREA_ADDR 1 /* iso10589 */
105 #define ISIS_TLV_IS_REACH 2 /* iso10589 */
106 #define ISIS_TLV_ESNEIGH 3 /* iso10589 */
107 #define ISIS_TLV_PART_DIS 4 /* iso10589 */
108 #define ISIS_TLV_PREFIX_NEIGH 5 /* iso10589 */
109 #define ISIS_TLV_ISNEIGH 6 /* iso10589 */
110 #define ISIS_TLV_ISNEIGH_VARLEN 7 /* iso10589 */
111 #define ISIS_TLV_PADDING 8 /* iso10589 */
112 #define ISIS_TLV_LSP 9 /* iso10589 */
113 #define ISIS_TLV_AUTH 10 /* iso10589, rfc3567 */
114 #define ISIS_TLV_CHECKSUM 12 /* rfc3358 */
115 #define ISIS_TLV_CHECKSUM_MINLEN 2
116 #define ISIS_TLV_POI 13 /* rfc6232 */
117 #define ISIS_TLV_LSP_BUFFERSIZE 14 /* iso10589 rev2 */
118 #define ISIS_TLV_LSP_BUFFERSIZE_MINLEN 2
119 #define ISIS_TLV_EXT_IS_REACH 22 /* rfc5305 */
120 #define ISIS_TLV_IS_ALIAS_ID 24 /* rfc5311 */
121 #define ISIS_TLV_DECNET_PHASE4 42
122 #define ISIS_TLV_LUCENT_PRIVATE 66
123 #define ISIS_TLV_INT_IP_REACH 128 /* rfc1195, rfc2966 */
124 #define ISIS_TLV_PROTOCOLS 129 /* rfc1195 */
125 #define ISIS_TLV_EXT_IP_REACH 130 /* rfc1195, rfc2966 */
126 #define ISIS_TLV_IDRP_INFO 131 /* rfc1195 */
127 #define ISIS_TLV_IDRP_INFO_MINLEN 1
128 #define ISIS_TLV_IPADDR 132 /* rfc1195 */
129 #define ISIS_TLV_IPAUTH 133 /* rfc1195 */
130 #define ISIS_TLV_TE_ROUTER_ID 134 /* rfc5305 */
131 #define ISIS_TLV_EXTD_IP_REACH 135 /* rfc5305 */
132 #define ISIS_TLV_HOSTNAME 137 /* rfc2763 */
133 #define ISIS_TLV_SHARED_RISK_GROUP 138 /* draft-ietf-isis-gmpls-extensions */
134 #define ISIS_TLV_MT_PORT_CAP 143 /* rfc6165 */
135 #define ISIS_TLV_MT_CAPABILITY 144 /* rfc6329 */
136 #define ISIS_TLV_NORTEL_PRIVATE1 176
137 #define ISIS_TLV_NORTEL_PRIVATE2 177
138 #define ISIS_TLV_RESTART_SIGNALING 211 /* rfc3847 */
139 #define ISIS_TLV_RESTART_SIGNALING_FLAGLEN 1
140 #define ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN 2
141 #define ISIS_TLV_MT_IS_REACH 222 /* draft-ietf-isis-wg-multi-topology-05 */
142 #define ISIS_TLV_MT_SUPPORTED 229 /* draft-ietf-isis-wg-multi-topology-05 */
143 #define ISIS_TLV_MT_SUPPORTED_MINLEN 2
144 #define ISIS_TLV_IP6ADDR 232 /* draft-ietf-isis-ipv6-02 */
145 #define ISIS_TLV_MT_IP_REACH 235 /* draft-ietf-isis-wg-multi-topology-05 */
146 #define ISIS_TLV_IP6_REACH 236 /* draft-ietf-isis-ipv6-02 */
147 #define ISIS_TLV_MT_IP6_REACH 237 /* draft-ietf-isis-wg-multi-topology-05 */
148 #define ISIS_TLV_PTP_ADJ 240 /* rfc3373 */
149 #define ISIS_TLV_IIH_SEQNR 241 /* draft-shen-isis-iih-sequence-00 */
150 #define ISIS_TLV_IIH_SEQNR_MINLEN 4
151 #define ISIS_TLV_VENDOR_PRIVATE 250 /* draft-ietf-isis-experimental-tlv-01 */
152 #define ISIS_TLV_VENDOR_PRIVATE_MINLEN 3
153
154 static const struct tok isis_tlv_values[] = {
155 { ISIS_TLV_AREA_ADDR, "Area address(es)"},
156 { ISIS_TLV_IS_REACH, "IS Reachability"},
157 { ISIS_TLV_ESNEIGH, "ES Neighbor(s)"},
158 { ISIS_TLV_PART_DIS, "Partition DIS"},
159 { ISIS_TLV_PREFIX_NEIGH, "Prefix Neighbors"},
160 { ISIS_TLV_ISNEIGH, "IS Neighbor(s)"},
161 { ISIS_TLV_ISNEIGH_VARLEN, "IS Neighbor(s) (variable length)"},
162 { ISIS_TLV_PADDING, "Padding"},
163 { ISIS_TLV_LSP, "LSP entries"},
164 { ISIS_TLV_AUTH, "Authentication"},
165 { ISIS_TLV_CHECKSUM, "Checksum"},
166 { ISIS_TLV_POI, "Purge Originator Identifier"},
167 { ISIS_TLV_LSP_BUFFERSIZE, "LSP Buffersize"},
168 { ISIS_TLV_EXT_IS_REACH, "Extended IS Reachability"},
169 { ISIS_TLV_IS_ALIAS_ID, "IS Alias ID"},
170 { ISIS_TLV_DECNET_PHASE4, "DECnet Phase IV"},
171 { ISIS_TLV_LUCENT_PRIVATE, "Lucent Proprietary"},
172 { ISIS_TLV_INT_IP_REACH, "IPv4 Internal Reachability"},
173 { ISIS_TLV_PROTOCOLS, "Protocols supported"},
174 { ISIS_TLV_EXT_IP_REACH, "IPv4 External Reachability"},
175 { ISIS_TLV_IDRP_INFO, "Inter-Domain Information Type"},
176 { ISIS_TLV_IPADDR, "IPv4 Interface address(es)"},
177 { ISIS_TLV_IPAUTH, "IPv4 authentication (deprecated)"},
178 { ISIS_TLV_TE_ROUTER_ID, "Traffic Engineering Router ID"},
179 { ISIS_TLV_EXTD_IP_REACH, "Extended IPv4 Reachability"},
180 { ISIS_TLV_SHARED_RISK_GROUP, "Shared Risk Link Group"},
181 { ISIS_TLV_MT_PORT_CAP, "Multi-Topology-Aware Port Capability"},
182 { ISIS_TLV_MT_CAPABILITY, "Multi-Topology Capability"},
183 { ISIS_TLV_NORTEL_PRIVATE1, "Nortel Proprietary"},
184 { ISIS_TLV_NORTEL_PRIVATE2, "Nortel Proprietary"},
185 { ISIS_TLV_HOSTNAME, "Hostname"},
186 { ISIS_TLV_RESTART_SIGNALING, "Restart Signaling"},
187 { ISIS_TLV_MT_IS_REACH, "Multi Topology IS Reachability"},
188 { ISIS_TLV_MT_SUPPORTED, "Multi Topology"},
189 { ISIS_TLV_IP6ADDR, "IPv6 Interface address(es)"},
190 { ISIS_TLV_MT_IP_REACH, "Multi-Topology IPv4 Reachability"},
191 { ISIS_TLV_IP6_REACH, "IPv6 reachability"},
192 { ISIS_TLV_MT_IP6_REACH, "Multi-Topology IP6 Reachability"},
193 { ISIS_TLV_PTP_ADJ, "Point-to-point Adjacency State"},
194 { ISIS_TLV_IIH_SEQNR, "Hello PDU Sequence Number"},
195 { ISIS_TLV_VENDOR_PRIVATE, "Vendor Private"},
196 { 0, NULL }
197 };
198
199 #define ESIS_OPTION_PROTOCOLS 129
200 #define ESIS_OPTION_QOS_MAINTENANCE 195 /* iso9542 */
201 #define ESIS_OPTION_SECURITY 197 /* iso9542 */
202 #define ESIS_OPTION_ES_CONF_TIME 198 /* iso9542 */
203 #define ESIS_OPTION_PRIORITY 205 /* iso9542 */
204 #define ESIS_OPTION_ADDRESS_MASK 225 /* iso9542 */
205 #define ESIS_OPTION_SNPA_MASK 226 /* iso9542 */
206
207 static const struct tok esis_option_values[] = {
208 { ESIS_OPTION_PROTOCOLS, "Protocols supported"},
209 { ESIS_OPTION_QOS_MAINTENANCE, "QoS Maintenance" },
210 { ESIS_OPTION_SECURITY, "Security" },
211 { ESIS_OPTION_ES_CONF_TIME, "ES Configuration Time" },
212 { ESIS_OPTION_PRIORITY, "Priority" },
213 { ESIS_OPTION_ADDRESS_MASK, "Addressk Mask" },
214 { ESIS_OPTION_SNPA_MASK, "SNPA Mask" },
215 { 0, NULL }
216 };
217
218 #define CLNP_OPTION_DISCARD_REASON 193
219 #define CLNP_OPTION_QOS_MAINTENANCE 195 /* iso8473 */
220 #define CLNP_OPTION_SECURITY 197 /* iso8473 */
221 #define CLNP_OPTION_SOURCE_ROUTING 200 /* iso8473 */
222 #define CLNP_OPTION_ROUTE_RECORDING 203 /* iso8473 */
223 #define CLNP_OPTION_PADDING 204 /* iso8473 */
224 #define CLNP_OPTION_PRIORITY 205 /* iso8473 */
225
226 static const struct tok clnp_option_values[] = {
227 { CLNP_OPTION_DISCARD_REASON, "Discard Reason"},
228 { CLNP_OPTION_PRIORITY, "Priority"},
229 { CLNP_OPTION_QOS_MAINTENANCE, "QoS Maintenance"},
230 { CLNP_OPTION_SECURITY, "Security"},
231 { CLNP_OPTION_SOURCE_ROUTING, "Source Routing"},
232 { CLNP_OPTION_ROUTE_RECORDING, "Route Recording"},
233 { CLNP_OPTION_PADDING, "Padding"},
234 { 0, NULL }
235 };
236
237 static const struct tok clnp_option_rfd_class_values[] = {
238 { 0x0, "General"},
239 { 0x8, "Address"},
240 { 0x9, "Source Routeing"},
241 { 0xa, "Lifetime"},
242 { 0xb, "PDU Discarded"},
243 { 0xc, "Reassembly"},
244 { 0, NULL }
245 };
246
247 static const struct tok clnp_option_rfd_general_values[] = {
248 { 0x0, "Reason not specified"},
249 { 0x1, "Protocol procedure error"},
250 { 0x2, "Incorrect checksum"},
251 { 0x3, "PDU discarded due to congestion"},
252 { 0x4, "Header syntax error (cannot be parsed)"},
253 { 0x5, "Segmentation needed but not permitted"},
254 { 0x6, "Incomplete PDU received"},
255 { 0x7, "Duplicate option"},
256 { 0, NULL }
257 };
258
259 static const struct tok clnp_option_rfd_address_values[] = {
260 { 0x0, "Destination address unreachable"},
261 { 0x1, "Destination address unknown"},
262 { 0, NULL }
263 };
264
265 static const struct tok clnp_option_rfd_source_routeing_values[] = {
266 { 0x0, "Unspecified source routeing error"},
267 { 0x1, "Syntax error in source routeing field"},
268 { 0x2, "Unknown address in source routeing field"},
269 { 0x3, "Path not acceptable"},
270 { 0, NULL }
271 };
272
273 static const struct tok clnp_option_rfd_lifetime_values[] = {
274 { 0x0, "Lifetime expired while data unit in transit"},
275 { 0x1, "Lifetime expired during reassembly"},
276 { 0, NULL }
277 };
278
279 static const struct tok clnp_option_rfd_pdu_discard_values[] = {
280 { 0x0, "Unsupported option not specified"},
281 { 0x1, "Unsupported protocol version"},
282 { 0x2, "Unsupported security option"},
283 { 0x3, "Unsupported source routeing option"},
284 { 0x4, "Unsupported recording of route option"},
285 { 0, NULL }
286 };
287
288 static const struct tok clnp_option_rfd_reassembly_values[] = {
289 { 0x0, "Reassembly interference"},
290 { 0, NULL }
291 };
292
293 /* array of 16 error-classes */
294 static const struct tok *clnp_option_rfd_error_class[] = {
295 clnp_option_rfd_general_values,
296 NULL,
297 NULL,
298 NULL,
299 NULL,
300 NULL,
301 NULL,
302 NULL,
303 clnp_option_rfd_address_values,
304 clnp_option_rfd_source_routeing_values,
305 clnp_option_rfd_lifetime_values,
306 clnp_option_rfd_pdu_discard_values,
307 clnp_option_rfd_reassembly_values,
308 NULL,
309 NULL,
310 NULL
311 };
312
313 #define CLNP_OPTION_OPTION_QOS_MASK 0x3f
314 #define CLNP_OPTION_SCOPE_MASK 0xc0
315 #define CLNP_OPTION_SCOPE_SA_SPEC 0x40
316 #define CLNP_OPTION_SCOPE_DA_SPEC 0x80
317 #define CLNP_OPTION_SCOPE_GLOBAL 0xc0
318
319 static const struct tok clnp_option_scope_values[] = {
320 { CLNP_OPTION_SCOPE_SA_SPEC, "Source Address Specific"},
321 { CLNP_OPTION_SCOPE_DA_SPEC, "Destination Address Specific"},
322 { CLNP_OPTION_SCOPE_GLOBAL, "Globally unique"},
323 { 0, NULL }
324 };
325
326 static const struct tok clnp_option_sr_rr_values[] = {
327 { 0x0, "partial"},
328 { 0x1, "complete"},
329 { 0, NULL }
330 };
331
332 static const struct tok clnp_option_sr_rr_string_values[] = {
333 { CLNP_OPTION_SOURCE_ROUTING, "source routing"},
334 { CLNP_OPTION_ROUTE_RECORDING, "recording of route in progress"},
335 { 0, NULL }
336 };
337
338 static const struct tok clnp_option_qos_global_values[] = {
339 { 0x20, "reserved"},
340 { 0x10, "sequencing vs. delay"},
341 { 0x08, "congested"},
342 { 0x04, "delay vs. cost"},
343 { 0x02, "error vs. delay"},
344 { 0x01, "error vs. cost"},
345 { 0, NULL }
346 };
347
348 #define ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP 3 /* rfc5305 */
349 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID 4 /* rfc4205 */
350 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID 5 /* rfc5305 */
351 #define ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR 6 /* rfc5305 */
352 #define ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR 8 /* rfc5305 */
353 #define ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW 9 /* rfc5305 */
354 #define ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW 10 /* rfc5305 */
355 #define ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW 11 /* rfc4124 */
356 #define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD 12 /* draft-ietf-tewg-diff-te-proto-06 */
357 #define ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC 18 /* rfc5305 */
358 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE 19 /* draft-ietf-isis-link-attr-01 */
359 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE 20 /* rfc4205 */
360 #define ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR 21 /* rfc4205 */
361 #define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS 22 /* rfc4124 */
362
363 #define ISIS_SUBTLV_SPB_METRIC 29 /* rfc6329 */
364
365 static const struct tok isis_ext_is_reach_subtlv_values[] = {
366 { ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP, "Administrative groups" },
367 { ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" },
368 { ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID, "Link Remote Identifier" },
369 { ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR, "IPv4 interface address" },
370 { ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR, "IPv4 neighbor address" },
371 { ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW, "Maximum link bandwidth" },
372 { ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW, "Reservable link bandwidth" },
373 { ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW, "Unreserved bandwidth" },
374 { ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC, "Traffic Engineering Metric" },
375 { ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE, "Link Attribute" },
376 { ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE, "Link Protection Type" },
377 { ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR, "Interface Switching Capability" },
378 { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD, "Bandwidth Constraints (old)" },
379 { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS, "Bandwidth Constraints" },
380 { ISIS_SUBTLV_SPB_METRIC, "SPB Metric" },
381 { 250, "Reserved for cisco specific extensions" },
382 { 251, "Reserved for cisco specific extensions" },
383 { 252, "Reserved for cisco specific extensions" },
384 { 253, "Reserved for cisco specific extensions" },
385 { 254, "Reserved for cisco specific extensions" },
386 { 255, "Reserved for future expansion" },
387 { 0, NULL }
388 };
389
390 #define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32 1 /* draft-ietf-isis-admin-tags-01 */
391 #define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64 2 /* draft-ietf-isis-admin-tags-01 */
392 #define ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR 117 /* draft-ietf-isis-wg-multi-topology-05 */
393
394 static const struct tok isis_ext_ip_reach_subtlv_values[] = {
395 { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32, "32-Bit Administrative tag" },
396 { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64, "64-Bit Administrative tag" },
397 { ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR, "Management Prefix Color" },
398 { 0, NULL }
399 };
400
401 static const struct tok isis_subtlv_link_attribute_values[] = {
402 { 0x01, "Local Protection Available" },
403 { 0x02, "Link excluded from local protection path" },
404 { 0x04, "Local maintenance required"},
405 { 0, NULL }
406 };
407
408 #define ISIS_SUBTLV_AUTH_SIMPLE 1
409 #define ISIS_SUBTLV_AUTH_GENERIC 3 /* rfc 5310 */
410 #define ISIS_SUBTLV_AUTH_MD5 54
411 #define ISIS_SUBTLV_AUTH_MD5_LEN 16
412 #define ISIS_SUBTLV_AUTH_PRIVATE 255
413
414 static const struct tok isis_subtlv_auth_values[] = {
415 { ISIS_SUBTLV_AUTH_SIMPLE, "simple text password"},
416 { ISIS_SUBTLV_AUTH_GENERIC, "Generic Crypto key-id"},
417 { ISIS_SUBTLV_AUTH_MD5, "HMAC-MD5 password"},
418 { ISIS_SUBTLV_AUTH_PRIVATE, "Routing Domain private password"},
419 { 0, NULL }
420 };
421
422 #define ISIS_SUBTLV_IDRP_RES 0
423 #define ISIS_SUBTLV_IDRP_LOCAL 1
424 #define ISIS_SUBTLV_IDRP_ASN 2
425
426 static const struct tok isis_subtlv_idrp_values[] = {
427 { ISIS_SUBTLV_IDRP_RES, "Reserved"},
428 { ISIS_SUBTLV_IDRP_LOCAL, "Routing-Domain Specific"},
429 { ISIS_SUBTLV_IDRP_ASN, "AS Number Tag"},
430 { 0, NULL}
431 };
432
433 #define ISIS_SUBTLV_SPB_MCID 4
434 #define ISIS_SUBTLV_SPB_DIGEST 5
435 #define ISIS_SUBTLV_SPB_BVID 6
436
437 #define ISIS_SUBTLV_SPB_INSTANCE 1
438 #define ISIS_SUBTLV_SPBM_SI 3
439
440 #define ISIS_SPB_MCID_LEN 51
441 #define ISIS_SUBTLV_SPB_MCID_MIN_LEN 102
442 #define ISIS_SUBTLV_SPB_DIGEST_MIN_LEN 33
443 #define ISIS_SUBTLV_SPB_BVID_MIN_LEN 6
444 #define ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN 19
445 #define ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN 8
446
447 static const struct tok isis_mt_port_cap_subtlv_values[] = {
448 { ISIS_SUBTLV_SPB_MCID, "SPB MCID" },
449 { ISIS_SUBTLV_SPB_DIGEST, "SPB Digest" },
450 { ISIS_SUBTLV_SPB_BVID, "SPB BVID" },
451 { 0, NULL }
452 };
453
454 static const struct tok isis_mt_capability_subtlv_values[] = {
455 { ISIS_SUBTLV_SPB_INSTANCE, "SPB Instance" },
456 { ISIS_SUBTLV_SPBM_SI, "SPBM Service Identifier and Unicast Address" },
457 { 0, NULL }
458 };
459
460 struct isis_spb_mcid {
461 nd_uint8_t format_id;
462 nd_byte name[32];
463 nd_uint16_t revision_lvl;
464 nd_byte digest[16];
465 };
466
467 struct isis_subtlv_spb_mcid {
468 struct isis_spb_mcid mcid;
469 struct isis_spb_mcid aux_mcid;
470 };
471
472 struct isis_subtlv_spb_instance {
473 nd_byte cist_root_id[8];
474 nd_uint32_t cist_external_root_path_cost;
475 nd_uint16_t bridge_priority;
476 nd_uint32_t spsourceid;
477 nd_uint8_t no_of_trees;
478 };
479
480 #define CLNP_SEGMENT_PART 0x80
481 #define CLNP_MORE_SEGMENTS 0x40
482 #define CLNP_REQUEST_ER 0x20
483
484 static const struct tok clnp_flag_values[] = {
485 { CLNP_SEGMENT_PART, "Segmentation permitted"},
486 { CLNP_MORE_SEGMENTS, "more Segments"},
487 { CLNP_REQUEST_ER, "request Error Report"},
488 { 0, NULL}
489 };
490
491 #define ISIS_MASK_LSP_OL_BIT(x) (EXTRACT_U_1(x)&0x4)
492 #define ISIS_MASK_LSP_ISTYPE_BITS(x) (EXTRACT_U_1(x)&0x3)
493 #define ISIS_MASK_LSP_PARTITION_BIT(x) (EXTRACT_U_1(x)&0x80)
494 #define ISIS_MASK_LSP_ATT_BITS(x) (EXTRACT_U_1(x)&0x78)
495 #define ISIS_MASK_LSP_ATT_ERROR_BIT(x) (EXTRACT_U_1(x)&0x40)
496 #define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x) (EXTRACT_U_1(x)&0x20)
497 #define ISIS_MASK_LSP_ATT_DELAY_BIT(x) (EXTRACT_U_1(x)&0x10)
498 #define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x) (EXTRACT_U_1(x)&0x8)
499
500 #define ISIS_MASK_MTID(x) ((x)&0x0fff)
501 #define ISIS_MASK_MTFLAGS(x) ((x)&0xf000)
502
503 static const struct tok isis_mt_flag_values[] = {
504 { 0x4000, "ATT bit set"},
505 { 0x8000, "Overload bit set"},
506 { 0, NULL}
507 };
508
509 #define ISIS_MASK_TLV_EXTD_IP_UPDOWN(x) ((x)&0x80)
510 #define ISIS_MASK_TLV_EXTD_IP_SUBTLV(x) ((x)&0x40)
511
512 #define ISIS_MASK_TLV_EXTD_IP6_IE(x) ((x)&0x40)
513 #define ISIS_MASK_TLV_EXTD_IP6_SUBTLV(x) ((x)&0x20)
514
515 #define ISIS_LSP_TLV_METRIC_SUPPORTED(x) (EXTRACT_U_1(x)&0x80)
516 #define ISIS_LSP_TLV_METRIC_IE(x) (EXTRACT_U_1(x)&0x40)
517 #define ISIS_LSP_TLV_METRIC_UPDOWN(x) (EXTRACT_U_1(x)&0x80)
518 #define ISIS_LSP_TLV_METRIC_VALUE(x) (EXTRACT_U_1(x)&0x3f)
519
520 #define ISIS_MASK_TLV_SHARED_RISK_GROUP(x) ((x)&0x1)
521
522 static const struct tok isis_mt_values[] = {
523 { 0, "IPv4 unicast"},
524 { 1, "In-Band Management"},
525 { 2, "IPv6 unicast"},
526 { 3, "Multicast"},
527 { 4095, "Development, Experimental or Proprietary"},
528 { 0, NULL }
529 };
530
531 static const struct tok isis_iih_circuit_type_values[] = {
532 { 1, "Level 1 only"},
533 { 2, "Level 2 only"},
534 { 3, "Level 1, Level 2"},
535 { 0, NULL}
536 };
537
538 #define ISIS_LSP_TYPE_UNUSED0 0
539 #define ISIS_LSP_TYPE_LEVEL_1 1
540 #define ISIS_LSP_TYPE_UNUSED2 2
541 #define ISIS_LSP_TYPE_LEVEL_2 3
542
543 static const struct tok isis_lsp_istype_values[] = {
544 { ISIS_LSP_TYPE_UNUSED0, "Unused 0x0 (invalid)"},
545 { ISIS_LSP_TYPE_LEVEL_1, "L1 IS"},
546 { ISIS_LSP_TYPE_UNUSED2, "Unused 0x2 (invalid)"},
547 { ISIS_LSP_TYPE_LEVEL_2, "L2 IS"},
548 { 0, NULL }
549 };
550
551 /*
552 * Katz's point to point adjacency TLV uses codes to tell us the state of
553 * the remote adjacency. Enumerate them.
554 */
555
556 #define ISIS_PTP_ADJ_UP 0
557 #define ISIS_PTP_ADJ_INIT 1
558 #define ISIS_PTP_ADJ_DOWN 2
559
560 static const struct tok isis_ptp_adjancey_values[] = {
561 { ISIS_PTP_ADJ_UP, "Up" },
562 { ISIS_PTP_ADJ_INIT, "Initializing" },
563 { ISIS_PTP_ADJ_DOWN, "Down" },
564 { 0, NULL}
565 };
566
567 struct isis_tlv_ptp_adj {
568 nd_uint8_t adjacency_state;
569 nd_uint32_t extd_local_circuit_id;
570 nd_byte neighbor_sysid[SYSTEM_ID_LEN];
571 nd_uint32_t neighbor_extd_local_circuit_id;
572 };
573
574 static void osi_print_cksum(netdissect_options *, const uint8_t *pptr,
575 uint16_t checksum, int checksum_offset, u_int length);
576 static int clnp_print(netdissect_options *, const uint8_t *, u_int);
577 static void esis_print(netdissect_options *, const uint8_t *, u_int);
578 static int isis_print(netdissect_options *, const uint8_t *, u_int);
579
580 struct isis_metric_block {
581 nd_uint8_t metric_default;
582 nd_uint8_t metric_delay;
583 nd_uint8_t metric_expense;
584 nd_uint8_t metric_error;
585 };
586
587 struct isis_tlv_is_reach {
588 struct isis_metric_block isis_metric_block;
589 nd_byte neighbor_nodeid[NODE_ID_LEN];
590 };
591
592 struct isis_tlv_es_reach {
593 struct isis_metric_block isis_metric_block;
594 nd_byte neighbor_sysid[SYSTEM_ID_LEN];
595 };
596
597 struct isis_tlv_ip_reach {
598 struct isis_metric_block isis_metric_block;
599 nd_ipv4 prefix;
600 nd_ipv4 mask;
601 };
602
603 static const struct tok isis_is_reach_virtual_values[] = {
604 { 0, "IsNotVirtual"},
605 { 1, "IsVirtual"},
606 { 0, NULL }
607 };
608
609 static const struct tok isis_restart_flag_values[] = {
610 { 0x1, "Restart Request"},
611 { 0x2, "Restart Acknowledgement"},
612 { 0x4, "Suppress adjacency advertisement"},
613 { 0, NULL }
614 };
615
616 struct isis_common_header {
617 nd_uint8_t nlpid;
618 nd_uint8_t fixed_len;
619 nd_uint8_t version; /* Protocol version */
620 nd_uint8_t id_length;
621 nd_uint8_t pdu_type; /* 3 MSbits are reserved */
622 nd_uint8_t pdu_version; /* Packet format version */
623 nd_byte reserved;
624 nd_uint8_t max_area;
625 };
626
627 struct isis_iih_lan_header {
628 nd_uint8_t circuit_type;
629 nd_byte source_id[SYSTEM_ID_LEN];
630 nd_uint16_t holding_time;
631 nd_uint16_t pdu_len;
632 nd_uint8_t priority;
633 nd_byte lan_id[NODE_ID_LEN];
634 };
635
636 struct isis_iih_ptp_header {
637 nd_uint8_t circuit_type;
638 nd_byte source_id[SYSTEM_ID_LEN];
639 nd_uint16_t holding_time;
640 nd_uint16_t pdu_len;
641 nd_uint8_t circuit_id;
642 };
643
644 struct isis_lsp_header {
645 nd_uint16_t pdu_len;
646 nd_uint16_t remaining_lifetime;
647 nd_byte lsp_id[LSP_ID_LEN];
648 nd_uint32_t sequence_number;
649 nd_uint16_t checksum;
650 nd_uint8_t typeblock;
651 };
652
653 struct isis_csnp_header {
654 nd_uint16_t pdu_len;
655 nd_byte source_id[NODE_ID_LEN];
656 nd_byte start_lsp_id[LSP_ID_LEN];
657 nd_byte end_lsp_id[LSP_ID_LEN];
658 };
659
660 struct isis_psnp_header {
661 nd_uint16_t pdu_len;
662 nd_byte source_id[NODE_ID_LEN];
663 };
664
665 struct isis_tlv_lsp {
666 nd_uint16_t remaining_lifetime;
667 nd_byte lsp_id[LSP_ID_LEN];
668 nd_uint32_t sequence_number;
669 nd_uint16_t checksum;
670 };
671
672 #define ISIS_COMMON_HEADER_SIZE (sizeof(struct isis_common_header))
673 #define ISIS_IIH_LAN_HEADER_SIZE (sizeof(struct isis_iih_lan_header))
674 #define ISIS_IIH_PTP_HEADER_SIZE (sizeof(struct isis_iih_ptp_header))
675 #define ISIS_LSP_HEADER_SIZE (sizeof(struct isis_lsp_header))
676 #define ISIS_CSNP_HEADER_SIZE (sizeof(struct isis_csnp_header))
677 #define ISIS_PSNP_HEADER_SIZE (sizeof(struct isis_psnp_header))
678
679 void
680 isoclns_print(netdissect_options *ndo, const uint8_t *p, u_int length)
681 {
682 if (!ND_TTEST_1(p)) { /* enough bytes on the wire ? */
683 ND_PRINT((ndo, "|OSI"));
684 return;
685 }
686
687 if (ndo->ndo_eflag)
688 ND_PRINT((ndo, "OSI NLPID %s (0x%02x): ", tok2str(nlpid_values, "Unknown", EXTRACT_U_1(p)), EXTRACT_U_1(p)));
689
690 switch (EXTRACT_U_1(p)) {
691
692 case NLPID_CLNP:
693 if (!clnp_print(ndo, p, length))
694 print_unknown_data(ndo, p, "\n\t", length);
695 break;
696
697 case NLPID_ESIS:
698 esis_print(ndo, p, length);
699 return;
700
701 case NLPID_ISIS:
702 if (!isis_print(ndo, p, length))
703 print_unknown_data(ndo, p, "\n\t", length);
704 break;
705
706 case NLPID_NULLNS:
707 ND_PRINT((ndo, "%slength: %u", ndo->ndo_eflag ? "" : ", ", length));
708 break;
709
710 case NLPID_Q933:
711 q933_print(ndo, p + 1, length - 1);
712 break;
713
714 case NLPID_IP:
715 ip_print(ndo, p + 1, length - 1);
716 break;
717
718 case NLPID_IP6:
719 ip6_print(ndo, p + 1, length - 1);
720 break;
721
722 case NLPID_PPP:
723 ppp_print(ndo, p + 1, length - 1);
724 break;
725
726 default:
727 if (!ndo->ndo_eflag)
728 ND_PRINT((ndo, "OSI NLPID 0x%02x unknown", EXTRACT_U_1(p)));
729 ND_PRINT((ndo, "%slength: %u", ndo->ndo_eflag ? "" : ", ", length));
730 if (length > 1)
731 print_unknown_data(ndo, p, "\n\t", length);
732 break;
733 }
734 }
735
736 #define CLNP_PDU_ER 1
737 #define CLNP_PDU_DT 28
738 #define CLNP_PDU_MD 29
739 #define CLNP_PDU_ERQ 30
740 #define CLNP_PDU_ERP 31
741
742 static const struct tok clnp_pdu_values[] = {
743 { CLNP_PDU_ER, "Error Report"},
744 { CLNP_PDU_MD, "MD"},
745 { CLNP_PDU_DT, "Data"},
746 { CLNP_PDU_ERQ, "Echo Request"},
747 { CLNP_PDU_ERP, "Echo Response"},
748 { 0, NULL }
749 };
750
751 struct clnp_header_t {
752 nd_uint8_t nlpid;
753 nd_uint8_t length_indicator;
754 nd_uint8_t version;
755 nd_uint8_t lifetime; /* units of 500ms */
756 nd_uint8_t type;
757 nd_uint16_t segment_length;
758 nd_uint16_t cksum;
759 };
760
761 struct clnp_segment_header_t {
762 nd_uint16_t data_unit_id;
763 nd_uint16_t segment_offset;
764 nd_uint16_t total_length;
765 };
766
767 /*
768 * clnp_print
769 * Decode CLNP packets. Return 0 on error.
770 */
771
772 static int
773 clnp_print(netdissect_options *ndo,
774 const uint8_t *pptr, u_int length)
775 {
776 const uint8_t *optr,*source_address,*dest_address;
777 u_int li,li_remaining,tlen,nsap_offset,source_address_length,dest_address_length, clnp_pdu_type, clnp_flags;
778 const struct clnp_header_t *clnp_header;
779 const struct clnp_segment_header_t *clnp_segment_header;
780 uint8_t rfd_error,rfd_error_major,rfd_error_minor;
781
782 clnp_header = (const struct clnp_header_t *) pptr;
783 ND_TCHECK(*clnp_header);
784
785 li = EXTRACT_U_1(clnp_header->length_indicator);
786 li_remaining = li;
787 optr = pptr;
788
789 if (!ndo->ndo_eflag)
790 ND_PRINT((ndo, "CLNP"));
791
792 /*
793 * Sanity checking of the header.
794 */
795
796 if (EXTRACT_U_1(clnp_header->version) != CLNP_VERSION) {
797 ND_PRINT((ndo, "version %u packet not supported", EXTRACT_U_1(clnp_header->version)));
798 return (0);
799 }
800
801 if (li > length) {
802 ND_PRINT((ndo, " length indicator(%u) > PDU size (%u)!", li, length));
803 return (0);
804 }
805
806 if (li < sizeof(struct clnp_header_t)) {
807 ND_PRINT((ndo, " length indicator %u < min PDU size:", li));
808 while (pptr < ndo->ndo_snapend) {
809 ND_PRINT((ndo, "%02X", EXTRACT_U_1(pptr)));
810 pptr++;
811 }
812 return (0);
813 }
814
815 /* FIXME further header sanity checking */
816
817 clnp_pdu_type = EXTRACT_U_1(clnp_header->type) & CLNP_PDU_TYPE_MASK;
818 clnp_flags = EXTRACT_U_1(clnp_header->type) & CLNP_FLAG_MASK;
819
820 pptr += sizeof(struct clnp_header_t);
821 li_remaining -= sizeof(struct clnp_header_t);
822
823 if (li_remaining < 1) {
824 ND_PRINT((ndo, "li < size of fixed part of CLNP header and addresses"));
825 return (0);
826 }
827 ND_TCHECK_1(pptr);
828 dest_address_length = EXTRACT_U_1(pptr);
829 pptr += 1;
830 li_remaining -= 1;
831 if (li_remaining < dest_address_length) {
832 ND_PRINT((ndo, "li < size of fixed part of CLNP header and addresses"));
833 return (0);
834 }
835 ND_TCHECK_LEN(pptr, dest_address_length);
836 dest_address = pptr;
837 pptr += dest_address_length;
838 li_remaining -= dest_address_length;
839
840 if (li_remaining < 1) {
841 ND_PRINT((ndo, "li < size of fixed part of CLNP header and addresses"));
842 return (0);
843 }
844 ND_TCHECK_1(pptr);
845 source_address_length = EXTRACT_U_1(pptr);
846 pptr += 1;
847 li_remaining -= 1;
848 if (li_remaining < source_address_length) {
849 ND_PRINT((ndo, "li < size of fixed part of CLNP header and addresses"));
850 return (0);
851 }
852 ND_TCHECK_LEN(pptr, source_address_length);
853 source_address = pptr;
854 pptr += source_address_length;
855 li_remaining -= source_address_length;
856
857 if (ndo->ndo_vflag < 1) {
858 ND_PRINT((ndo, "%s%s > %s, %s, length %u",
859 ndo->ndo_eflag ? "" : ", ",
860 isonsap_string(ndo, source_address, source_address_length),
861 isonsap_string(ndo, dest_address, dest_address_length),
862 tok2str(clnp_pdu_values,"unknown (%u)",clnp_pdu_type),
863 length));
864 return (1);
865 }
866 ND_PRINT((ndo, "%slength %u", ndo->ndo_eflag ? "" : ", ", length));
867
868 ND_PRINT((ndo, "\n\t%s PDU, hlen: %u, v: %u, lifetime: %u.%us, Segment PDU length: %u, checksum: 0x%04x",
869 tok2str(clnp_pdu_values, "unknown (%u)",clnp_pdu_type),
870 EXTRACT_U_1(clnp_header->length_indicator),
871 EXTRACT_U_1(clnp_header->version),
872 EXTRACT_U_1(clnp_header->lifetime)/2,
873 (EXTRACT_U_1(clnp_header->lifetime)%2)*5,
874 EXTRACT_BE_U_2(clnp_header->segment_length),
875 EXTRACT_BE_U_2(clnp_header->cksum)));
876
877 osi_print_cksum(ndo, optr, EXTRACT_BE_U_2(clnp_header->cksum), 7,
878 EXTRACT_U_1(clnp_header->length_indicator));
879
880 ND_PRINT((ndo, "\n\tFlags [%s]",
881 bittok2str(clnp_flag_values, "none", clnp_flags)));
882
883 ND_PRINT((ndo, "\n\tsource address (length %u): %s\n\tdest address (length %u): %s",
884 source_address_length,
885 isonsap_string(ndo, source_address, source_address_length),
886 dest_address_length,
887 isonsap_string(ndo, dest_address, dest_address_length)));
888
889 if (clnp_flags & CLNP_SEGMENT_PART) {
890 if (li_remaining < sizeof(struct clnp_segment_header_t)) {
891 ND_PRINT((ndo, "li < size of fixed part of CLNP header, addresses, and segment part"));
892 return (0);
893 }
894 clnp_segment_header = (const struct clnp_segment_header_t *) pptr;
895 ND_TCHECK(*clnp_segment_header);
896 ND_PRINT((ndo, "\n\tData Unit ID: 0x%04x, Segment Offset: %u, Total PDU Length: %u",
897 EXTRACT_BE_U_2(clnp_segment_header->data_unit_id),
898 EXTRACT_BE_U_2(clnp_segment_header->segment_offset),
899 EXTRACT_BE_U_2(clnp_segment_header->total_length)));
900 pptr+=sizeof(struct clnp_segment_header_t);
901 li_remaining-=sizeof(struct clnp_segment_header_t);
902 }
903
904 /* now walk the options */
905 while (li_remaining >= 2) {
906 u_int op, opli;
907 const uint8_t *tptr;
908
909 if (li_remaining < 2) {
910 ND_PRINT((ndo, ", bad opts/li"));
911 return (0);
912 }
913 ND_TCHECK_2(pptr);
914 op = EXTRACT_U_1(pptr);
915 opli = EXTRACT_U_1(pptr + 1);
916 pptr += 2;
917 li_remaining -= 2;
918 if (opli > li_remaining) {
919 ND_PRINT((ndo, ", opt (%u) too long", op));
920 return (0);
921 }
922 ND_TCHECK_LEN(pptr, opli);
923 li_remaining -= opli;
924 tptr = pptr;
925 tlen = opli;
926
927 ND_PRINT((ndo, "\n\t %s Option #%u, length %u, value: ",
928 tok2str(clnp_option_values,"Unknown",op),
929 op,
930 opli));
931
932 /*
933 * We've already checked that the entire option is present
934 * in the captured packet with the ND_TCHECK_LEN() call.
935 * Therefore, we don't need to do ND_TCHECK()/ND_TCHECK_LEN()
936 * checks.
937 * We do, however, need to check tlen, to make sure we
938 * don't run past the end of the option.
939 */
940 switch (op) {
941
942
943 case CLNP_OPTION_ROUTE_RECORDING: /* those two options share the format */
944 case CLNP_OPTION_SOURCE_ROUTING:
945 if (tlen < 2) {
946 ND_PRINT((ndo, ", bad opt len"));
947 return (0);
948 }
949 ND_PRINT((ndo, "%s %s",
950 tok2str(clnp_option_sr_rr_values,"Unknown",EXTRACT_U_1(tptr)),
951 tok2str(clnp_option_sr_rr_string_values, "Unknown Option %u", op)));
952 nsap_offset=EXTRACT_U_1(tptr + 1);
953 if (nsap_offset == 0) {
954 ND_PRINT((ndo, " Bad NSAP offset (0)"));
955 break;
956 }
957 nsap_offset-=1; /* offset to nsap list */
958 if (nsap_offset > tlen) {
959 ND_PRINT((ndo, " Bad NSAP offset (past end of option)"));
960 break;
961 }
962 tptr+=nsap_offset;
963 tlen-=nsap_offset;
964 while (tlen > 0) {
965 source_address_length=EXTRACT_U_1(tptr);
966 if (tlen < source_address_length+1) {
967 ND_PRINT((ndo, "\n\t NSAP address goes past end of option"));
968 break;
969 }
970 if (source_address_length > 0) {
971 source_address=(tptr+1);
972 ND_TCHECK_LEN(source_address,
973 source_address_length);
974 ND_PRINT((ndo, "\n\t NSAP address (length %u): %s",
975 source_address_length,
976 isonsap_string(ndo, source_address, source_address_length)));
977 }
978 tlen-=source_address_length+1;
979 }
980 break;
981
982 case CLNP_OPTION_PRIORITY:
983 if (tlen < 1) {
984 ND_PRINT((ndo, ", bad opt len"));
985 return (0);
986 }
987 ND_PRINT((ndo, "0x%1x", EXTRACT_U_1(tptr)&0x0f));
988 break;
989
990 case CLNP_OPTION_QOS_MAINTENANCE:
991 if (tlen < 1) {
992 ND_PRINT((ndo, ", bad opt len"));
993 return (0);
994 }
995 ND_PRINT((ndo, "\n\t Format Code: %s",
996 tok2str(clnp_option_scope_values, "Reserved", EXTRACT_U_1(tptr) & CLNP_OPTION_SCOPE_MASK)));
997
998 if ((EXTRACT_U_1(tptr)&CLNP_OPTION_SCOPE_MASK) == CLNP_OPTION_SCOPE_GLOBAL)
999 ND_PRINT((ndo, "\n\t QoS Flags [%s]",
1000 bittok2str(clnp_option_qos_global_values,
1001 "none",
1002 EXTRACT_U_1(tptr)&CLNP_OPTION_OPTION_QOS_MASK)));
1003 break;
1004
1005 case CLNP_OPTION_SECURITY:
1006 if (tlen < 2) {
1007 ND_PRINT((ndo, ", bad opt len"));
1008 return (0);
1009 }
1010 ND_PRINT((ndo, "\n\t Format Code: %s, Security-Level %u",
1011 tok2str(clnp_option_scope_values,"Reserved",EXTRACT_U_1(tptr)&CLNP_OPTION_SCOPE_MASK),
1012 EXTRACT_U_1(tptr + 1)));
1013 break;
1014
1015 case CLNP_OPTION_DISCARD_REASON:
1016 if (tlen < 1) {
1017 ND_PRINT((ndo, ", bad opt len"));
1018 return (0);
1019 }
1020 rfd_error = EXTRACT_U_1(tptr);
1021 rfd_error_major = (rfd_error&0xf0) >> 4;
1022 rfd_error_minor = rfd_error&0x0f;
1023 ND_PRINT((ndo, "\n\t Class: %s Error (0x%01x), %s (0x%01x)",
1024 tok2str(clnp_option_rfd_class_values,"Unknown",rfd_error_major),
1025 rfd_error_major,
1026 tok2str(clnp_option_rfd_error_class[rfd_error_major],"Unknown",rfd_error_minor),
1027 rfd_error_minor));
1028 break;
1029
1030 case CLNP_OPTION_PADDING:
1031 ND_PRINT((ndo, "padding data"));
1032 break;
1033
1034 /*
1035 * FIXME those are the defined Options that lack a decoder
1036 * you are welcome to contribute code ;-)
1037 */
1038
1039 default:
1040 print_unknown_data(ndo, tptr, "\n\t ", opli);
1041 break;
1042 }
1043 if (ndo->ndo_vflag > 1)
1044 print_unknown_data(ndo, pptr, "\n\t ", opli);
1045 pptr += opli;
1046 }
1047
1048 switch (clnp_pdu_type) {
1049
1050 case CLNP_PDU_ER: /* fall through */
1051 case CLNP_PDU_ERP:
1052 ND_TCHECK_1(pptr);
1053 if (EXTRACT_U_1(pptr) == NLPID_CLNP) {
1054 ND_PRINT((ndo, "\n\t-----original packet-----\n\t"));
1055 /* FIXME recursion protection */
1056 clnp_print(ndo, pptr, length - li);
1057 break;
1058 }
1059
1060 case CLNP_PDU_DT:
1061 case CLNP_PDU_MD:
1062 case CLNP_PDU_ERQ:
1063
1064 default:
1065 /* dump the PDU specific data */
1066 if (length-(pptr-optr) > 0) {
1067 ND_PRINT((ndo, "\n\t undecoded non-header data, length %u", length-li));
1068 print_unknown_data(ndo, pptr, "\n\t ", length - (pptr - optr));
1069 }
1070 }
1071
1072 return (1);
1073
1074 trunc:
1075 ND_PRINT((ndo, "[|clnp]"));
1076 return (1);
1077
1078 }
1079
1080
1081 #define ESIS_PDU_REDIRECT 6
1082 #define ESIS_PDU_ESH 2
1083 #define ESIS_PDU_ISH 4
1084
1085 static const struct tok esis_pdu_values[] = {
1086 { ESIS_PDU_REDIRECT, "redirect"},
1087 { ESIS_PDU_ESH, "ESH"},
1088 { ESIS_PDU_ISH, "ISH"},
1089 { 0, NULL }
1090 };
1091
1092 struct esis_header_t {
1093 nd_uint8_t nlpid;
1094 nd_uint8_t length_indicator;
1095 nd_uint8_t version;
1096 nd_byte reserved;
1097 nd_uint8_t type;
1098 nd_uint16_t holdtime;
1099 nd_uint16_t cksum;
1100 };
1101
1102 static void
1103 esis_print(netdissect_options *ndo,
1104 const uint8_t *pptr, u_int length)
1105 {
1106 const uint8_t *optr;
1107 u_int li, version, esis_pdu_type, source_address_length, source_address_number;
1108 const struct esis_header_t *esis_header;
1109
1110 if (!ndo->ndo_eflag)
1111 ND_PRINT((ndo, "ES-IS"));
1112
1113 if (length <= 2) {
1114 ND_PRINT((ndo, ndo->ndo_qflag ? "bad pkt!" : "no header at all!"));
1115 return;
1116 }
1117
1118 esis_header = (const struct esis_header_t *) pptr;
1119 ND_TCHECK(*esis_header);
1120 li = EXTRACT_U_1(esis_header->length_indicator);
1121 optr = pptr;
1122
1123 /*
1124 * Sanity checking of the header.
1125 */
1126
1127 if (EXTRACT_U_1(esis_header->nlpid) != NLPID_ESIS) {
1128 ND_PRINT((ndo, " nlpid 0x%02x packet not supported", EXTRACT_U_1(esis_header->nlpid)));
1129 return;
1130 }
1131
1132 version = EXTRACT_U_1(esis_header->version);
1133 if (version != ESIS_VERSION) {
1134 ND_PRINT((ndo, " version %u packet not supported", version));
1135 return;
1136 }
1137
1138 if (li > length) {
1139 ND_PRINT((ndo, " length indicator(%u) > PDU size (%u)!", li, length));
1140 return;
1141 }
1142
1143 if (li < sizeof(struct esis_header_t) + 2) {
1144 ND_PRINT((ndo, " length indicator %u < min PDU size:", li));
1145 while (pptr < ndo->ndo_snapend) {
1146 ND_PRINT((ndo, "%02X", EXTRACT_U_1(pptr)));
1147 pptr++;
1148 }
1149 return;
1150 }
1151
1152 esis_pdu_type = EXTRACT_U_1(esis_header->type) & ESIS_PDU_TYPE_MASK;
1153
1154 if (ndo->ndo_vflag < 1) {
1155 ND_PRINT((ndo, "%s%s, length %u",
1156 ndo->ndo_eflag ? "" : ", ",
1157 tok2str(esis_pdu_values,"unknown type (%u)",esis_pdu_type),
1158 length));
1159 return;
1160 } else
1161 ND_PRINT((ndo, "%slength %u\n\t%s (%u)",
1162 ndo->ndo_eflag ? "" : ", ",
1163 length,
1164 tok2str(esis_pdu_values,"unknown type: %u", esis_pdu_type),
1165 esis_pdu_type));
1166
1167 ND_PRINT((ndo, ", v: %u%s", version, version == ESIS_VERSION ? "" : "unsupported" ));
1168 ND_PRINT((ndo, ", checksum: 0x%04x", EXTRACT_BE_U_2(esis_header->cksum)));
1169
1170 osi_print_cksum(ndo, pptr, EXTRACT_BE_U_2(esis_header->cksum), 7,
1171 li);
1172
1173 ND_PRINT((ndo, ", holding time: %us, length indicator: %u",
1174 EXTRACT_BE_U_2(esis_header->holdtime), li));
1175
1176 if (ndo->ndo_vflag > 1)
1177 print_unknown_data(ndo, optr, "\n\t", sizeof(struct esis_header_t));
1178
1179 pptr += sizeof(struct esis_header_t);
1180 li -= sizeof(struct esis_header_t);
1181
1182 switch (esis_pdu_type) {
1183 case ESIS_PDU_REDIRECT: {
1184 const uint8_t *dst, *snpa, *neta;
1185 u_int dstl, snpal, netal;
1186
1187 ND_TCHECK_1(pptr);
1188 if (li < 1) {
1189 ND_PRINT((ndo, ", bad redirect/li"));
1190 return;
1191 }
1192 dstl = EXTRACT_U_1(pptr);
1193 pptr++;
1194 li--;
1195 ND_TCHECK_LEN(pptr, dstl);
1196 if (li < dstl) {
1197 ND_PRINT((ndo, ", bad redirect/li"));
1198 return;
1199 }
1200 dst = pptr;
1201 pptr += dstl;
1202 li -= dstl;
1203 ND_PRINT((ndo, "\n\t %s", isonsap_string(ndo, dst, dstl)));
1204
1205 ND_TCHECK_1(pptr);
1206 if (li < 1) {
1207 ND_PRINT((ndo, ", bad redirect/li"));
1208 return;
1209 }
1210 snpal = EXTRACT_U_1(pptr);
1211 pptr++;
1212 li--;
1213 ND_TCHECK_LEN(pptr, snpal);
1214 if (li < snpal) {
1215 ND_PRINT((ndo, ", bad redirect/li"));
1216 return;
1217 }
1218 snpa = pptr;
1219 pptr += snpal;
1220 li -= snpal;
1221 ND_TCHECK_1(pptr);
1222 if (li < 1) {
1223 ND_PRINT((ndo, ", bad redirect/li"));
1224 return;
1225 }
1226 netal = EXTRACT_U_1(pptr);
1227 pptr++;
1228 ND_TCHECK_LEN(pptr, netal);
1229 if (li < netal) {
1230 ND_PRINT((ndo, ", bad redirect/li"));
1231 return;
1232 }
1233 neta = pptr;
1234 pptr += netal;
1235 li -= netal;
1236
1237 if (snpal == 6)
1238 ND_PRINT((ndo, "\n\t SNPA (length: %u): %s",
1239 snpal,
1240 etheraddr_string(ndo, snpa)));
1241 else
1242 ND_PRINT((ndo, "\n\t SNPA (length: %u): %s",
1243 snpal,
1244 linkaddr_string(ndo, snpa, LINKADDR_OTHER, snpal)));
1245 if (netal != 0)
1246 ND_PRINT((ndo, "\n\t NET (length: %u) %s",
1247 netal,
1248 isonsap_string(ndo, neta, netal)));
1249 break;
1250 }
1251
1252 case ESIS_PDU_ESH:
1253 ND_TCHECK_1(pptr);
1254 if (li < 1) {
1255 ND_PRINT((ndo, ", bad esh/li"));
1256 return;
1257 }
1258 source_address_number = EXTRACT_U_1(pptr);
1259 pptr++;
1260 li--;
1261
1262 ND_PRINT((ndo, "\n\t Number of Source Addresses: %u", source_address_number));
1263
1264 while (source_address_number > 0) {
1265 ND_TCHECK_1(pptr);
1266 if (li < 1) {
1267 ND_PRINT((ndo, ", bad esh/li"));
1268 return;
1269 }
1270 source_address_length = EXTRACT_U_1(pptr);
1271 pptr++;
1272 li--;
1273
1274 ND_TCHECK_LEN(pptr, source_address_length);
1275 if (li < source_address_length) {
1276 ND_PRINT((ndo, ", bad esh/li"));
1277 return;
1278 }
1279 ND_PRINT((ndo, "\n\t NET (length: %u): %s",
1280 source_address_length,
1281 isonsap_string(ndo, pptr, source_address_length)));
1282 pptr += source_address_length;
1283 li -= source_address_length;
1284 source_address_number--;
1285 }
1286
1287 break;
1288
1289 case ESIS_PDU_ISH: {
1290 ND_TCHECK_1(pptr);
1291 if (li < 1) {
1292 ND_PRINT((ndo, ", bad ish/li"));
1293 return;
1294 }
1295 source_address_length = EXTRACT_U_1(pptr);
1296 pptr++;
1297 li--;
1298 ND_TCHECK_LEN(pptr, source_address_length);
1299 if (li < source_address_length) {
1300 ND_PRINT((ndo, ", bad ish/li"));
1301 return;
1302 }
1303 ND_PRINT((ndo, "\n\t NET (length: %u): %s", source_address_length, isonsap_string(ndo, pptr, source_address_length)));
1304 pptr += source_address_length;
1305 li -= source_address_length;
1306 break;
1307 }
1308
1309 default:
1310 if (ndo->ndo_vflag <= 1) {
1311 if (pptr < ndo->ndo_snapend)
1312 print_unknown_data(ndo, pptr, "\n\t ", ndo->ndo_snapend - pptr);
1313 }
1314 return;
1315 }
1316
1317 /* now walk the options */
1318 while (li != 0) {
1319 u_int op, opli;
1320 const uint8_t *tptr;
1321
1322 if (li < 2) {
1323 ND_PRINT((ndo, ", bad opts/li"));
1324 return;
1325 }
1326 ND_TCHECK_2(pptr);
1327 op = EXTRACT_U_1(pptr);
1328 opli = EXTRACT_U_1(pptr + 1);
1329 pptr += 2;
1330 li -= 2;
1331 if (opli > li) {
1332 ND_PRINT((ndo, ", opt (%u) too long", op));
1333 return;
1334 }
1335 li -= opli;
1336 tptr = pptr;
1337
1338 ND_PRINT((ndo, "\n\t %s Option #%u, length %u, value: ",
1339 tok2str(esis_option_values,"Unknown",op),
1340 op,
1341 opli));
1342
1343 switch (op) {
1344
1345 case ESIS_OPTION_ES_CONF_TIME:
1346 if (opli == 2) {
1347 ND_TCHECK_2(pptr);
1348 ND_PRINT((ndo, "%us", EXTRACT_BE_U_2(tptr)));
1349 } else
1350 ND_PRINT((ndo, "(bad length)"));
1351 break;
1352
1353 case ESIS_OPTION_PROTOCOLS:
1354 while (opli>0) {
1355 ND_TCHECK_1(tptr);
1356 ND_PRINT((ndo, "%s (0x%02x)",
1357 tok2str(nlpid_values,
1358 "unknown",
1359 EXTRACT_U_1(tptr)),
1360 EXTRACT_U_1(tptr)));
1361 if (opli>1) /* further NPLIDs ? - put comma */
1362 ND_PRINT((ndo, ", "));
1363 tptr++;
1364 opli--;
1365 }
1366 break;
1367
1368 /*
1369 * FIXME those are the defined Options that lack a decoder
1370 * you are welcome to contribute code ;-)
1371 */
1372
1373 case ESIS_OPTION_QOS_MAINTENANCE:
1374 case ESIS_OPTION_SECURITY:
1375 case ESIS_OPTION_PRIORITY:
1376 case ESIS_OPTION_ADDRESS_MASK:
1377 case ESIS_OPTION_SNPA_MASK:
1378
1379 default:
1380 print_unknown_data(ndo, tptr, "\n\t ", opli);
1381 break;
1382 }
1383 if (ndo->ndo_vflag > 1)
1384 print_unknown_data(ndo, pptr, "\n\t ", opli);
1385 pptr += opli;
1386 }
1387 trunc:
1388 ND_PRINT((ndo, "[|esis]"));
1389 }
1390
1391 static void
1392 isis_print_mcid(netdissect_options *ndo,
1393 const struct isis_spb_mcid *mcid)
1394 {
1395 int i;
1396
1397 ND_TCHECK(*mcid);
1398 ND_PRINT((ndo, "ID: %u, Name: ", EXTRACT_U_1(mcid->format_id)));
1399
1400 if (fn_printzp(ndo, mcid->name, 32, ndo->ndo_snapend))
1401 goto trunc;
1402
1403 ND_PRINT((ndo, "\n\t Lvl: %u", EXTRACT_BE_U_2(mcid->revision_lvl)));
1404
1405 ND_PRINT((ndo, ", Digest: "));
1406
1407 for(i=0;i<16;i++)
1408 ND_PRINT((ndo, "%.2x ", mcid->digest[i]));
1409
1410 trunc:
1411 ND_PRINT((ndo, "%s", tstr));
1412 }
1413
1414 static int
1415 isis_print_mt_port_cap_subtlv(netdissect_options *ndo,
1416 const uint8_t *tptr, u_int len)
1417 {
1418 u_int stlv_type, stlv_len;
1419 const struct isis_subtlv_spb_mcid *subtlv_spb_mcid;
1420 int i;
1421
1422 while (len > 2)
1423 {
1424 ND_TCHECK_2(tptr);
1425 stlv_type = EXTRACT_U_1(tptr);
1426 stlv_len = EXTRACT_U_1(tptr + 1);
1427
1428 /* first lets see if we know the subTLVs name*/
1429 ND_PRINT((ndo, "\n\t %s subTLV #%u, length: %u",
1430 tok2str(isis_mt_port_cap_subtlv_values, "unknown", stlv_type),
1431 stlv_type,
1432 stlv_len));
1433
1434 tptr = tptr + 2;
1435 /*len -= TLV_TYPE_LEN_OFFSET;*/
1436 len = len - 2;
1437
1438 /* Make sure the subTLV fits within the space left */
1439 if (len < stlv_len)
1440 goto trunc;
1441 /* Make sure the entire subTLV is in the captured data */
1442 ND_TCHECK_LEN(tptr, stlv_len);
1443
1444 switch (stlv_type)
1445 {
1446 case ISIS_SUBTLV_SPB_MCID:
1447 {
1448 if (stlv_len < ISIS_SUBTLV_SPB_MCID_MIN_LEN)
1449 goto trunc;
1450
1451 subtlv_spb_mcid = (const struct isis_subtlv_spb_mcid *)tptr;
1452
1453 ND_PRINT((ndo, "\n\t MCID: "));
1454 isis_print_mcid(ndo, &(subtlv_spb_mcid->mcid));
1455
1456 /*tptr += SPB_MCID_MIN_LEN;
1457 len -= SPB_MCID_MIN_LEN; */
1458
1459 ND_PRINT((ndo, "\n\t AUX-MCID: "));
1460 isis_print_mcid(ndo, &(subtlv_spb_mcid->aux_mcid));
1461
1462 /*tptr += SPB_MCID_MIN_LEN;
1463 len -= SPB_MCID_MIN_LEN; */
1464 tptr = tptr + ISIS_SUBTLV_SPB_MCID_MIN_LEN;
1465 len = len - ISIS_SUBTLV_SPB_MCID_MIN_LEN;
1466 stlv_len = stlv_len - ISIS_SUBTLV_SPB_MCID_MIN_LEN;
1467
1468 break;
1469 }
1470
1471 case ISIS_SUBTLV_SPB_DIGEST:
1472 {
1473 if (stlv_len < ISIS_SUBTLV_SPB_DIGEST_MIN_LEN)
1474 goto trunc;
1475
1476 ND_PRINT((ndo, "\n\t RES: %u V: %u A: %u D: %u",
1477 (EXTRACT_U_1(tptr) >> 5),
1478 ((EXTRACT_U_1(tptr) >> 4) & 0x01),
1479 ((EXTRACT_U_1(tptr) >> 2) & 0x03),
1480 (EXTRACT_U_1(tptr) & 0x03)));
1481
1482 tptr++;
1483
1484 ND_PRINT((ndo, "\n\t Digest: "));
1485
1486 for(i=1;i<=8; i++)
1487 {
1488 ND_PRINT((ndo, "%08x ", EXTRACT_BE_U_4(tptr)));
1489 if (i%4 == 0 && i != 8)
1490 ND_PRINT((ndo, "\n\t "));
1491 tptr = tptr + 4;
1492 }
1493
1494 len = len - ISIS_SUBTLV_SPB_DIGEST_MIN_LEN;
1495 stlv_len = stlv_len - ISIS_SUBTLV_SPB_DIGEST_MIN_LEN;
1496
1497 break;
1498 }
1499
1500 case ISIS_SUBTLV_SPB_BVID:
1501 {
1502 while (stlv_len >= ISIS_SUBTLV_SPB_BVID_MIN_LEN)
1503 {
1504 ND_PRINT((ndo, "\n\t ECT: %08x",
1505 EXTRACT_BE_U_4(tptr)));
1506
1507 tptr = tptr+4;
1508
1509 ND_PRINT((ndo, " BVID: %u, U:%01x M:%01x ",
1510 (EXTRACT_BE_U_2(tptr) >> 4) ,
1511 (EXTRACT_BE_U_2(tptr) >> 3) & 0x01,
1512 (EXTRACT_BE_U_2(tptr) >> 2) & 0x01));
1513
1514 tptr = tptr + 2;
1515 len = len - ISIS_SUBTLV_SPB_BVID_MIN_LEN;
1516 stlv_len = stlv_len - ISIS_SUBTLV_SPB_BVID_MIN_LEN;
1517 }
1518
1519 break;
1520 }
1521
1522 default:
1523 break;
1524 }
1525 tptr += stlv_len;
1526 len -= stlv_len;
1527 }
1528
1529 return 0;
1530
1531 trunc:
1532 ND_PRINT((ndo, "\n\t\t"));
1533 ND_PRINT((ndo, "%s", tstr));
1534 return(1);
1535 }
1536
1537 static int
1538 isis_print_mt_capability_subtlv(netdissect_options *ndo,
1539 const uint8_t *tptr, u_int len)
1540 {
1541 u_int stlv_type, stlv_len, tmp;
1542
1543 while (len > 2)
1544 {
1545 ND_TCHECK_2(tptr);
1546 stlv_type = EXTRACT_U_1(tptr);
1547 stlv_len = EXTRACT_U_1(tptr + 1);
1548 tptr = tptr + 2;
1549 len = len - 2;
1550
1551 /* first lets see if we know the subTLVs name*/
1552 ND_PRINT((ndo, "\n\t %s subTLV #%u, length: %u",
1553 tok2str(isis_mt_capability_subtlv_values, "unknown", stlv_type),
1554 stlv_type,
1555 stlv_len));
1556
1557 /* Make sure the subTLV fits within the space left */
1558 if (len < stlv_len)
1559 goto trunc;
1560 /* Make sure the entire subTLV is in the captured data */
1561 ND_TCHECK_LEN(tptr, stlv_len);
1562
1563 switch (stlv_type)
1564 {
1565 case ISIS_SUBTLV_SPB_INSTANCE:
1566 if (stlv_len < ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN)
1567 goto trunc;
1568
1569 ND_PRINT((ndo, "\n\t CIST Root-ID: %08x", EXTRACT_BE_U_4(tptr)));
1570 tptr = tptr+4;
1571 ND_PRINT((ndo, " %08x", EXTRACT_BE_U_4(tptr)));
1572 tptr = tptr+4;
1573 ND_PRINT((ndo, ", Path Cost: %08x", EXTRACT_BE_U_4(tptr)));
1574 tptr = tptr+4;
1575 ND_PRINT((ndo, ", Prio: %u", EXTRACT_BE_U_2(tptr)));
1576 tptr = tptr + 2;
1577 ND_PRINT((ndo, "\n\t RES: %u",
1578 EXTRACT_BE_U_2(tptr) >> 5));
1579 ND_PRINT((ndo, ", V: %u",
1580 (EXTRACT_BE_U_2(tptr) >> 4) & 0x0001));
1581 ND_PRINT((ndo, ", SPSource-ID: %u",
1582 (EXTRACT_BE_U_4(tptr) & 0x000fffff)));
1583 tptr = tptr+4;
1584 ND_PRINT((ndo, ", No of Trees: %x", EXTRACT_U_1(tptr)));
1585
1586 tmp = EXTRACT_U_1(tptr);
1587 tptr++;
1588
1589 len = len - ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN;
1590 stlv_len = stlv_len - ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN;
1591
1592 while (tmp)
1593 {
1594 if (stlv_len < ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN)
1595 goto trunc;
1596
1597 ND_PRINT((ndo, "\n\t U:%u, M:%u, A:%u, RES:%u",
1598 EXTRACT_U_1(tptr) >> 7,
1599 (EXTRACT_U_1(tptr) >> 6) & 0x01,
1600 (EXTRACT_U_1(tptr) >> 5) & 0x01,
1601 (EXTRACT_U_1(tptr) & 0x1f)));
1602
1603 tptr++;
1604
1605 ND_PRINT((ndo, ", ECT: %08x", EXTRACT_BE_U_4(tptr)));
1606
1607 tptr = tptr + 4;
1608
1609 ND_PRINT((ndo, ", BVID: %u, SPVID: %u",
1610 (EXTRACT_BE_U_3(tptr) >> 12) & 0x000fff,
1611 EXTRACT_BE_U_3(tptr) & 0x000fff));
1612
1613 tptr = tptr + 3;
1614 len = len - ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN;
1615 stlv_len = stlv_len - ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN;
1616 tmp--;
1617 }
1618
1619 break;
1620
1621 case ISIS_SUBTLV_SPBM_SI:
1622 if (stlv_len < 8)
1623 goto trunc;
1624
1625 ND_PRINT((ndo, "\n\t BMAC: %08x", EXTRACT_BE_U_4(tptr)));
1626 tptr = tptr+4;
1627 ND_PRINT((ndo, "%04x", EXTRACT_BE_U_2(tptr)));
1628 tptr = tptr+2;
1629
1630 ND_PRINT((ndo, ", RES: %u, VID: %u", EXTRACT_BE_U_2(tptr) >> 12,
1631 (EXTRACT_BE_U_2(tptr)) & 0x0fff));
1632
1633 tptr = tptr+2;
1634 len = len - 8;
1635 stlv_len = stlv_len - 8;
1636
1637 while (stlv_len >= 4) {
1638 ND_TCHECK_4(tptr);
1639 ND_PRINT((ndo, "\n\t T: %u, R: %u, RES: %u, ISID: %u",
1640 (EXTRACT_BE_U_4(tptr) >> 31),
1641 (EXTRACT_BE_U_4(tptr) >> 30) & 0x01,
1642 (EXTRACT_BE_U_4(tptr) >> 24) & 0x03f,
1643 (EXTRACT_BE_U_4(tptr)) & 0x0ffffff));
1644
1645 tptr = tptr + 4;
1646 len = len - 4;
1647 stlv_len = stlv_len - 4;
1648 }
1649
1650 break;
1651
1652 default:
1653 break;
1654 }
1655 tptr += stlv_len;
1656 len -= stlv_len;
1657 }
1658 return 0;
1659
1660 trunc:
1661 ND_PRINT((ndo, "\n\t\t"));
1662 ND_PRINT((ndo, "%s", tstr));
1663 return(1);
1664 }
1665
1666 /* shared routine for printing system, node and lsp-ids */
1667 static char *
1668 isis_print_id(const uint8_t *cp, u_int id_len)
1669 {
1670 u_int i;
1671 static char id[sizeof("xxxx.xxxx.xxxx.yy-zz")];
1672 char *pos = id;
1673 u_int sysid_len;
1674
1675 sysid_len = SYSTEM_ID_LEN;
1676 if (sysid_len > id_len)
1677 sysid_len = id_len;
1678 for (i = 1; i <= sysid_len; i++) {
1679 snprintf(pos, sizeof(id) - (pos - id), "%02x", EXTRACT_U_1(cp));
1680 cp++;
1681 pos += strlen(pos);
1682 if (i == 2 || i == 4)
1683 *pos++ = '.';
1684 }
1685 if (id_len >= NODE_ID_LEN) {
1686 snprintf(pos, sizeof(id) - (pos - id), ".%02x", EXTRACT_U_1(cp));
1687 cp++;
1688 pos += strlen(pos);
1689 }
1690 if (id_len == LSP_ID_LEN)
1691 snprintf(pos, sizeof(id) - (pos - id), "-%02x", EXTRACT_U_1(cp));
1692 return (id);
1693 }
1694
1695 /* print the 4-byte metric block which is common found in the old-style TLVs */
1696 static int
1697 isis_print_metric_block(netdissect_options *ndo,
1698 const struct isis_metric_block *isis_metric_block)
1699 {
1700 ND_PRINT((ndo, ", Default Metric: %u, %s",
1701 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_default),
1702 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_default) ? "External" : "Internal"));
1703 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_delay))
1704 ND_PRINT((ndo, "\n\t\t Delay Metric: %u, %s",
1705 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_delay),
1706 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_delay) ? "External" : "Internal"));
1707 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_expense))
1708 ND_PRINT((ndo, "\n\t\t Expense Metric: %u, %s",
1709 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_expense),
1710 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_expense) ? "External" : "Internal"));
1711 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_error))
1712 ND_PRINT((ndo, "\n\t\t Error Metric: %u, %s",
1713 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_error),
1714 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_error) ? "External" : "Internal"));
1715
1716 return(1); /* everything is ok */
1717 }
1718
1719 static int
1720 isis_print_tlv_ip_reach(netdissect_options *ndo,
1721 const uint8_t *cp, const char *ident, u_int length)
1722 {
1723 int prefix_len;
1724 const struct isis_tlv_ip_reach *tlv_ip_reach;
1725
1726 tlv_ip_reach = (const struct isis_tlv_ip_reach *)cp;
1727
1728 while (length > 0) {
1729 if ((size_t)length < sizeof(*tlv_ip_reach)) {
1730 ND_PRINT((ndo, "short IPv4 Reachability (%u vs %lu)",
1731 length,
1732 (unsigned long)sizeof(*tlv_ip_reach)));
1733 return (0);
1734 }
1735
1736 if (!ND_TTEST(*tlv_ip_reach))
1737 return (0);
1738
1739 prefix_len = mask2plen(EXTRACT_IPV4_TO_HOST_ORDER(tlv_ip_reach->mask));
1740
1741 if (prefix_len == -1)
1742 ND_PRINT((ndo, "%sIPv4 prefix: %s mask %s",
1743 ident,
1744 ipaddr_string(ndo, (tlv_ip_reach->prefix)),
1745 ipaddr_string(ndo, (tlv_ip_reach->mask))));
1746 else
1747 ND_PRINT((ndo, "%sIPv4 prefix: %15s/%u",
1748 ident,
1749 ipaddr_string(ndo, (tlv_ip_reach->prefix)),
1750 prefix_len));
1751
1752 ND_PRINT((ndo, ", Distribution: %s, Metric: %u, %s",
1753 ISIS_LSP_TLV_METRIC_UPDOWN(tlv_ip_reach->isis_metric_block.metric_default) ? "down" : "up",
1754 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_default),
1755 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_default) ? "External" : "Internal"));
1756
1757 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_delay))
1758 ND_PRINT((ndo, "%s Delay Metric: %u, %s",
1759 ident,
1760 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_delay),
1761 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_delay) ? "External" : "Internal"));
1762
1763 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_expense))
1764 ND_PRINT((ndo, "%s Expense Metric: %u, %s",
1765 ident,
1766 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_expense),
1767 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_expense) ? "External" : "Internal"));
1768
1769 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_error))
1770 ND_PRINT((ndo, "%s Error Metric: %u, %s",
1771 ident,
1772 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_error),
1773 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_error) ? "External" : "Internal"));
1774
1775 length -= sizeof(struct isis_tlv_ip_reach);
1776 tlv_ip_reach++;
1777 }
1778 return (1);
1779 }
1780
1781 /*
1782 * this is the common IP-REACH subTLV decoder it is called
1783 * from various EXTD-IP REACH TLVs (135,235,236,237)
1784 */
1785
1786 static int
1787 isis_print_ip_reach_subtlv(netdissect_options *ndo,
1788 const uint8_t *tptr, u_int subt, u_int subl,
1789 const char *ident)
1790 {
1791 /* first lets see if we know the subTLVs name*/
1792 ND_PRINT((ndo, "%s%s subTLV #%u, length: %u",
1793 ident, tok2str(isis_ext_ip_reach_subtlv_values, "unknown", subt),
1794 subt, subl));
1795
1796 ND_TCHECK_LEN(tptr, subl);
1797
1798 switch(subt) {
1799 case ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR: /* fall through */
1800 case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32:
1801 while (subl >= 4) {
1802 ND_PRINT((ndo, ", 0x%08x (=%u)",
1803 EXTRACT_BE_U_4(tptr),
1804 EXTRACT_BE_U_4(tptr)));
1805 tptr+=4;
1806 subl-=4;
1807 }
1808 break;
1809 case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64:
1810 while (subl >= 8) {
1811 ND_PRINT((ndo, ", 0x%08x%08x",
1812 EXTRACT_BE_U_4(tptr),
1813 EXTRACT_BE_U_4(tptr + 4)));
1814 tptr+=8;
1815 subl-=8;
1816 }
1817 break;
1818 default:
1819 if (!print_unknown_data(ndo, tptr, "\n\t\t ", subl))
1820 return(0);
1821 break;
1822 }
1823 return(1);
1824
1825 trunc:
1826 ND_PRINT((ndo, "%s", ident));
1827 ND_PRINT((ndo, "%s", tstr));
1828 return(0);
1829 }
1830
1831 /*
1832 * this is the common IS-REACH decoder it is called
1833 * from various EXTD-IS REACH style TLVs (22,24,222)
1834 */
1835
1836 static int
1837 isis_print_ext_is_reach(netdissect_options *ndo,
1838 const uint8_t *tptr, const char *ident, u_int tlv_type,
1839 u_int tlv_remaining)
1840 {
1841 char ident_buffer[20];
1842 u_int subtlv_type,subtlv_len,subtlv_sum_len;
1843 int proc_bytes = 0; /* how many bytes did we process ? */
1844 u_int te_class,priority_level,gmpls_switch_cap;
1845 union { /* int to float conversion buffer for several subTLVs */
1846 float f;
1847 uint32_t i;
1848 } bw;
1849
1850 if (!ND_TTEST_LEN(tptr, NODE_ID_LEN))
1851 return(0);
1852 if (tlv_remaining < NODE_ID_LEN)
1853 return(0);
1854
1855 ND_PRINT((ndo, "%sIS Neighbor: %s", ident, isis_print_id(tptr, NODE_ID_LEN)));
1856 tptr+=NODE_ID_LEN;
1857 tlv_remaining-=NODE_ID_LEN;
1858
1859 if (tlv_type != ISIS_TLV_IS_ALIAS_ID) { /* the Alias TLV Metric field is implicit 0 */
1860 if (!ND_TTEST_3(tptr)) /* and is therefore skipped */
1861 return(0);
1862 if (tlv_remaining < 3)
1863 return(0);
1864 ND_PRINT((ndo, ", Metric: %u", EXTRACT_BE_U_3(tptr)));
1865 tptr+=3;
1866 tlv_remaining-=3;
1867 }
1868
1869 if (!ND_TTEST_1(tptr))
1870 return(0);
1871 if (tlv_remaining < 1)
1872 return(0);
1873 subtlv_sum_len=EXTRACT_U_1(tptr); /* read out subTLV length */
1874 tptr++;
1875 tlv_remaining--;
1876 proc_bytes=NODE_ID_LEN+3+1;
1877 ND_PRINT((ndo, ", %ssub-TLVs present",subtlv_sum_len ? "" : "no "));
1878 if (subtlv_sum_len) {
1879 ND_PRINT((ndo, " (%u)", subtlv_sum_len));
1880 /* prepend the indent string */
1881 snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident);
1882 ident = ident_buffer;
1883 while (subtlv_sum_len != 0) {
1884 if (!ND_TTEST_2(tptr))
1885 return(0);
1886 if (tlv_remaining < 2) {
1887 ND_PRINT((ndo, "%sRemaining data in TLV shorter than a subTLV header",ident));
1888 proc_bytes += tlv_remaining;
1889 break;
1890 }
1891 if (subtlv_sum_len < 2) {
1892 ND_PRINT((ndo, "%sRemaining data in subTLVs shorter than a subTLV header",ident));
1893 proc_bytes += subtlv_sum_len;
1894 break;
1895 }
1896 subtlv_type=EXTRACT_U_1(tptr);
1897 subtlv_len=EXTRACT_U_1(tptr + 1);
1898 tptr += 2;
1899 tlv_remaining -= 2;
1900 subtlv_sum_len -= 2;
1901 proc_bytes += 2;
1902 ND_PRINT((ndo, "%s%s subTLV #%u, length: %u",
1903 ident, tok2str(isis_ext_is_reach_subtlv_values, "unknown", subtlv_type),
1904 subtlv_type, subtlv_len));
1905
1906 if (subtlv_sum_len < subtlv_len) {
1907 ND_PRINT((ndo, " (remaining data in subTLVs shorter than the current subTLV)"));
1908 proc_bytes += subtlv_sum_len;
1909 break;
1910 }
1911
1912 if (tlv_remaining < subtlv_len) {
1913 ND_PRINT((ndo, " (> remaining tlv length)"));
1914 proc_bytes += tlv_remaining;
1915 break;
1916 }
1917
1918 ND_TCHECK_LEN(tptr, subtlv_len);
1919
1920 switch(subtlv_type) {
1921 case ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP:
1922 case ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID:
1923 case ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID:
1924 if (subtlv_len >= 4) {
1925 ND_PRINT((ndo, ", 0x%08x", EXTRACT_BE_U_4(tptr)));
1926 if (subtlv_len == 8) /* rfc4205 */
1927 ND_PRINT((ndo, ", 0x%08x", EXTRACT_BE_U_4(tptr + 4)));
1928 }
1929 break;
1930 case ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR:
1931 case ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR:
1932 if (subtlv_len >= sizeof(struct in_addr))
1933 ND_PRINT((ndo, ", %s", ipaddr_string(ndo, tptr)));
1934 break;
1935 case ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW :
1936 case ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW:
1937 if (subtlv_len >= 4) {
1938 bw.i = EXTRACT_BE_U_4(tptr);
1939 ND_PRINT((ndo, ", %.3f Mbps", bw.f * 8 / 1000000));
1940 }
1941 break;
1942 case ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW :
1943 if (subtlv_len >= 32) {
1944 for (te_class = 0; te_class < 8; te_class++) {
1945 bw.i = EXTRACT_BE_U_4(tptr);
1946 ND_PRINT((ndo, "%s TE-Class %u: %.3f Mbps",
1947 ident,
1948 te_class,
1949 bw.f * 8 / 1000000));
1950 tptr += 4;
1951 subtlv_len -= 4;
1952 subtlv_sum_len -= 4;
1953 proc_bytes += 4;
1954 }
1955 }
1956 break;
1957 case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS: /* fall through */
1958 case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD:
1959 if (subtlv_len == 0)
1960 break;
1961 ND_PRINT((ndo, "%sBandwidth Constraints Model ID: %s (%u)",
1962 ident,
1963 tok2str(diffserv_te_bc_values, "unknown", EXTRACT_U_1(tptr)),
1964 EXTRACT_U_1(tptr)));
1965 tptr++;
1966 subtlv_len--;
1967 subtlv_sum_len--;
1968 proc_bytes++;
1969 /* decode BCs until the subTLV ends */
1970 for (te_class = 0; subtlv_len != 0; te_class++) {
1971 if (subtlv_len < 4)
1972 break;
1973 bw.i = EXTRACT_BE_U_4(tptr);
1974 ND_PRINT((ndo, "%s Bandwidth constraint CT%u: %.3f Mbps",
1975 ident,
1976 te_class,
1977 bw.f * 8 / 1000000));
1978 tptr += 4;
1979 subtlv_len -= 4;
1980 subtlv_sum_len -= 4;
1981 proc_bytes += 4;
1982 }
1983 break;
1984 case ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC:
1985 if (subtlv_len >= 3)
1986 ND_PRINT((ndo, ", %u", EXTRACT_BE_U_3(tptr)));
1987 break;
1988 case ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE:
1989 if (subtlv_len == 2) {
1990 ND_PRINT((ndo, ", [ %s ] (0x%04x)",
1991 bittok2str(isis_subtlv_link_attribute_values,
1992 "Unknown",
1993 EXTRACT_BE_U_2(tptr)),
1994 EXTRACT_BE_U_2(tptr)));
1995 }
1996 break;
1997 case ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE:
1998 if (subtlv_len >= 2) {
1999 ND_PRINT((ndo, ", %s, Priority %u",
2000 bittok2str(gmpls_link_prot_values, "none", EXTRACT_U_1(tptr)),
2001 EXTRACT_U_1(tptr + 1)));
2002 }
2003 break;
2004 case ISIS_SUBTLV_SPB_METRIC:
2005 if (subtlv_len >= 6) {
2006 ND_PRINT((ndo, ", LM: %u", EXTRACT_BE_U_3(tptr)));
2007 tptr += 3;
2008 subtlv_len -= 3;
2009 subtlv_sum_len -= 3;
2010 proc_bytes += 3;
2011 ND_PRINT((ndo, ", P: %u", EXTRACT_U_1(tptr)));
2012 tptr++;
2013 subtlv_len--;
2014 subtlv_sum_len--;
2015 proc_bytes++;
2016 ND_PRINT((ndo, ", P-ID: %u", EXTRACT_BE_U_2(tptr)));
2017 }
2018 break;
2019 case ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR:
2020 if (subtlv_len >= 36) {
2021 gmpls_switch_cap = EXTRACT_U_1(tptr);
2022 ND_PRINT((ndo, "%s Interface Switching Capability:%s",
2023 ident,
2024 tok2str(gmpls_switch_cap_values, "Unknown", gmpls_switch_cap)));
2025 ND_PRINT((ndo, ", LSP Encoding: %s",
2026 tok2str(gmpls_encoding_values, "Unknown", EXTRACT_U_1((tptr + 1)))));
2027 tptr += 4;
2028 subtlv_len -= 4;
2029 subtlv_sum_len -= 4;
2030 proc_bytes += 4;
2031 ND_PRINT((ndo, "%s Max LSP Bandwidth:", ident));
2032 for (priority_level = 0; priority_level < 8; priority_level++) {
2033 bw.i = EXTRACT_BE_U_4(tptr);
2034 ND_PRINT((ndo, "%s priority level %u: %.3f Mbps",
2035 ident,
2036 priority_level,
2037 bw.f * 8 / 1000000));
2038 tptr += 4;
2039 subtlv_len -= 4;
2040 subtlv_sum_len -= 4;
2041 proc_bytes += 4;
2042 }
2043 switch (gmpls_switch_cap) {
2044 case GMPLS_PSC1:
2045 case GMPLS_PSC2:
2046 case GMPLS_PSC3:
2047 case GMPLS_PSC4:
2048 if (subtlv_len < 6)
2049 break;
2050 bw.i = EXTRACT_BE_U_4(tptr);
2051 ND_PRINT((ndo, "%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000));
2052 ND_PRINT((ndo, "%s Interface MTU: %u", ident, EXTRACT_BE_U_2(tptr + 4)));
2053 break;
2054 case GMPLS_TSC:
2055 if (subtlv_len < 8)
2056 break;
2057 bw.i = EXTRACT_BE_U_4(tptr);
2058 ND_PRINT((ndo, "%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000));
2059 ND_PRINT((ndo, "%s Indication %s", ident,
2060 tok2str(gmpls_switch_cap_tsc_indication_values, "Unknown (%u)", EXTRACT_U_1((tptr + 4)))));
2061 break;
2062 default:
2063 /* there is some optional stuff left to decode but this is as of yet
2064 not specified so just lets hexdump what is left */
2065 if (subtlv_len != 0) {
2066 if (!print_unknown_data(ndo, tptr, "\n\t\t ", subtlv_len))
2067 return(0);
2068 }
2069 }
2070 }
2071 break;
2072 default:
2073 if (!print_unknown_data(ndo, tptr, "\n\t\t ", subtlv_len))
2074 return(0);
2075 break;
2076 }
2077
2078 tptr += subtlv_len;
2079 tlv_remaining -= subtlv_len;
2080 subtlv_sum_len -= subtlv_len;
2081 proc_bytes += subtlv_len;
2082 }
2083 }
2084 return(proc_bytes);
2085
2086 trunc:
2087 return(0);
2088 }
2089
2090 /*
2091 * this is the common Multi Topology ID decoder
2092 * it is called from various MT-TLVs (222,229,235,237)
2093 */
2094
2095 static int
2096 isis_print_mtid(netdissect_options *ndo,
2097 const uint8_t *tptr, const char *ident)
2098 {
2099 if (!ND_TTEST_2(tptr))
2100 return(0);
2101
2102 ND_PRINT((ndo, "%s%s",
2103 ident,
2104 tok2str(isis_mt_values,
2105 "Reserved for IETF Consensus",
2106 ISIS_MASK_MTID(EXTRACT_BE_U_2(tptr)))));
2107
2108 ND_PRINT((ndo, " Topology (0x%03x), Flags: [%s]",
2109 ISIS_MASK_MTID(EXTRACT_BE_U_2(tptr)),
2110 bittok2str(isis_mt_flag_values, "none",ISIS_MASK_MTFLAGS(EXTRACT_BE_U_2(tptr)))));
2111
2112 return(2);
2113 }
2114
2115 /*
2116 * this is the common extended IP reach decoder
2117 * it is called from TLVs (135,235,236,237)
2118 * we process the TLV and optional subTLVs and return
2119 * the amount of processed bytes
2120 */
2121
2122 static int
2123 isis_print_extd_ip_reach(netdissect_options *ndo,
2124 const uint8_t *tptr, const char *ident, uint16_t afi)
2125 {
2126 char ident_buffer[20];
2127 uint8_t prefix[sizeof(struct in6_addr)]; /* shared copy buffer for IPv4 and IPv6 prefixes */
2128 u_int metric, status_byte, bit_length, byte_length, sublen, processed, subtlvtype, subtlvlen;
2129
2130 if (!ND_TTEST_4(tptr))
2131 return (0);
2132 metric = EXTRACT_BE_U_4(tptr);
2133 processed=4;
2134 tptr+=4;
2135
2136 if (afi == AF_INET) {
2137 if (!ND_TTEST_1(tptr)) /* fetch status byte */
2138 return (0);
2139 status_byte=EXTRACT_U_1(tptr);
2140 tptr++;
2141 bit_length = status_byte&0x3f;
2142 if (bit_length > 32) {
2143 ND_PRINT((ndo, "%sIPv4 prefix: bad bit length %u",
2144 ident,
2145 bit_length));
2146 return (0);
2147 }
2148 processed++;
2149 } else if (afi == AF_INET6) {
2150 if (!ND_TTEST_2(tptr)) /* fetch status & prefix_len byte */
2151 return (0);
2152 status_byte=EXTRACT_U_1(tptr);
2153 bit_length=EXTRACT_U_1(tptr + 1);
2154 if (bit_length > 128) {
2155 ND_PRINT((ndo, "%sIPv6 prefix: bad bit length %u",
2156 ident,
2157 bit_length));
2158 return (0);
2159 }
2160 tptr+=2;
2161 processed+=2;
2162 } else
2163 return (0); /* somebody is fooling us */
2164
2165 byte_length = (bit_length + 7) / 8; /* prefix has variable length encoding */
2166
2167 if (!ND_TTEST_LEN(tptr, byte_length))
2168 return (0);
2169 memset(prefix, 0, sizeof prefix); /* clear the copy buffer */
2170 memcpy(prefix,tptr,byte_length); /* copy as much as is stored in the TLV */
2171 tptr+=byte_length;
2172 processed+=byte_length;
2173
2174 if (afi == AF_INET)
2175 ND_PRINT((ndo, "%sIPv4 prefix: %15s/%u",
2176 ident,
2177 ipaddr_string(ndo, prefix),
2178 bit_length));
2179 else if (afi == AF_INET6)
2180 ND_PRINT((ndo, "%sIPv6 prefix: %s/%u",
2181 ident,
2182 ip6addr_string(ndo, prefix),
2183 bit_length));
2184
2185 ND_PRINT((ndo, ", Distribution: %s, Metric: %u",
2186 ISIS_MASK_TLV_EXTD_IP_UPDOWN(status_byte) ? "down" : "up",
2187 metric));
2188
2189 if (afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte))
2190 ND_PRINT((ndo, ", sub-TLVs present"));
2191 else if (afi == AF_INET6)
2192 ND_PRINT((ndo, ", %s%s",
2193 ISIS_MASK_TLV_EXTD_IP6_IE(status_byte) ? "External" : "Internal",
2194 ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte) ? ", sub-TLVs present" : ""));
2195
2196 if ((afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte))
2197 || (afi == AF_INET6 && ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte))
2198 ) {
2199 /* assume that one prefix can hold more
2200 than one subTLV - therefore the first byte must reflect
2201 the aggregate bytecount of the subTLVs for this prefix
2202 */
2203 if (!ND_TTEST_1(tptr))
2204 return (0);
2205 sublen=EXTRACT_U_1(tptr);
2206 tptr++;
2207 processed+=sublen+1;
2208 ND_PRINT((ndo, " (%u)", sublen)); /* print out subTLV length */
2209
2210 while (sublen>0) {
2211 if (!ND_TTEST_2(tptr))
2212 return (0);
2213 subtlvtype=EXTRACT_U_1(tptr);
2214 subtlvlen=EXTRACT_U_1(tptr + 1);
2215 tptr+=2;
2216 /* prepend the indent string */
2217 snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident);
2218 if (!isis_print_ip_reach_subtlv(ndo, tptr, subtlvtype, subtlvlen, ident_buffer))
2219 return(0);
2220 tptr+=subtlvlen;
2221 sublen-=(subtlvlen+2);
2222 }
2223 }
2224 return (processed);
2225 }
2226
2227 /*
2228 * Clear checksum and lifetime prior to signature verification.
2229 */
2230 static void
2231 isis_clear_checksum_lifetime(void *header)
2232 {
2233 struct isis_lsp_header *header_lsp = (struct isis_lsp_header *) header;
2234
2235 header_lsp->checksum[0] = 0;
2236 header_lsp->checksum[1] = 0;
2237 header_lsp->remaining_lifetime[0] = 0;
2238 header_lsp->remaining_lifetime[1] = 0;
2239 }
2240
2241 /*
2242 * isis_print
2243 * Decode IS-IS packets. Return 0 on error.
2244 */
2245
2246 static int
2247 isis_print(netdissect_options *ndo,
2248 const uint8_t *p, u_int length)
2249 {
2250 const struct isis_common_header *isis_header;
2251
2252 const struct isis_iih_lan_header *header_iih_lan;
2253 const struct isis_iih_ptp_header *header_iih_ptp;
2254 const struct isis_lsp_header *header_lsp;
2255 const struct isis_csnp_header *header_csnp;
2256 const struct isis_psnp_header *header_psnp;
2257
2258 const struct isis_tlv_lsp *tlv_lsp;
2259 const struct isis_tlv_ptp_adj *tlv_ptp_adj;
2260 const struct isis_tlv_is_reach *tlv_is_reach;
2261 const struct isis_tlv_es_reach *tlv_es_reach;
2262
2263 uint8_t version, pdu_version, fixed_len;
2264 uint8_t pdu_type, pdu_max_area, max_area, pdu_id_length, id_length, tlv_type, tlv_len, tmp, alen, lan_alen, prefix_len;
2265 uint8_t ext_is_len, ext_ip_len, mt_len;
2266 uint8_t isis_subtlv_idrp;
2267 const uint8_t *optr, *pptr, *tptr;
2268 u_short packet_len,pdu_len, key_id;
2269 u_int i,vendor_id;
2270 int sigcheck;
2271
2272 packet_len=length;
2273 optr = p; /* initialize the _o_riginal pointer to the packet start -
2274 need it for parsing the checksum TLV and authentication
2275 TLV verification */
2276 isis_header = (const struct isis_common_header *)p;
2277 ND_TCHECK(*isis_header);
2278 if (length < ISIS_COMMON_HEADER_SIZE)
2279 goto trunc;
2280 pptr = p+(ISIS_COMMON_HEADER_SIZE);
2281 header_iih_lan = (const struct isis_iih_lan_header *)pptr;
2282 header_iih_ptp = (const struct isis_iih_ptp_header *)pptr;
2283 header_lsp = (const struct isis_lsp_header *)pptr;
2284 header_csnp = (const struct isis_csnp_header *)pptr;
2285 header_psnp = (const struct isis_psnp_header *)pptr;
2286
2287 if (!ndo->ndo_eflag)
2288 ND_PRINT((ndo, "IS-IS"));
2289
2290 /*
2291 * Sanity checking of the header.
2292 */
2293
2294 version = EXTRACT_U_1(isis_header->version);
2295 if (version != ISIS_VERSION) {
2296 ND_PRINT((ndo, "version %u packet not supported", version));
2297 return (0);
2298 }
2299
2300 pdu_id_length = EXTRACT_U_1(isis_header->id_length);
2301 if ((pdu_id_length != SYSTEM_ID_LEN) && (pdu_id_length != 0)) {
2302 ND_PRINT((ndo, "system ID length of %u is not supported",
2303 pdu_id_length));
2304 return (0);
2305 }
2306
2307 pdu_version = EXTRACT_U_1(isis_header->pdu_version);
2308 if (pdu_version != ISIS_VERSION) {
2309 ND_PRINT((ndo, "version %u packet not supported", pdu_version));
2310 return (0);
2311 }
2312
2313 fixed_len = EXTRACT_U_1(isis_header->fixed_len);
2314 if (length < fixed_len) {
2315 ND_PRINT((ndo, "fixed header length %u > packet length %u", fixed_len, length));
2316 return (0);
2317 }
2318
2319 if (fixed_len < ISIS_COMMON_HEADER_SIZE) {
2320 ND_PRINT((ndo, "fixed header length %u < minimum header size %u", fixed_len, (u_int)ISIS_COMMON_HEADER_SIZE));
2321 return (0);
2322 }
2323
2324 pdu_max_area = EXTRACT_U_1(isis_header->max_area);
2325 switch(pdu_max_area) {
2326 case 0:
2327 max_area = 3; /* silly shit */
2328 break;
2329 case 255:
2330 ND_PRINT((ndo, "bad packet -- 255 areas"));
2331 return (0);
2332 default:
2333 max_area = pdu_max_area;
2334 break;
2335 }
2336
2337 switch(pdu_id_length) {
2338 case 0:
2339 id_length = 6; /* silly shit again */
2340 break;
2341 case 1: /* 1-8 are valid sys-ID lenghts */
2342 case 2:
2343 case 3:
2344 case 4:
2345 case 5:
2346 case 6:
2347 case 7:
2348 case 8:
2349 id_length = pdu_id_length;
2350 break;
2351 case 255:
2352 id_length = 0; /* entirely useless */
2353 break;
2354 default:
2355 id_length = pdu_id_length;
2356 break;
2357 }
2358
2359 /* toss any non 6-byte sys-ID len PDUs */
2360 if (id_length != 6 ) {
2361 ND_PRINT((ndo, "bad packet -- illegal sys-ID length (%u)", id_length));
2362 return (0);
2363 }
2364
2365 pdu_type = EXTRACT_U_1(isis_header->pdu_type);
2366
2367 /* in non-verbose mode print the basic PDU Type plus PDU specific brief information*/
2368 if (ndo->ndo_vflag == 0) {
2369 ND_PRINT((ndo, "%s%s",
2370 ndo->ndo_eflag ? "" : ", ",
2371 tok2str(isis_pdu_values, "unknown PDU-Type %u", pdu_type)));
2372 } else {
2373 /* ok they seem to want to know everything - lets fully decode it */
2374 ND_PRINT((ndo, "%slength %u", ndo->ndo_eflag ? "" : ", ", length));
2375
2376 ND_PRINT((ndo, "\n\t%s, hlen: %u, v: %u, pdu-v: %u, sys-id-len: %u (%u), max-area: %u (%u)",
2377 tok2str(isis_pdu_values,
2378 "unknown, type %u",
2379 pdu_type),
2380 fixed_len,
2381 version,
2382 pdu_version,
2383 id_length,
2384 pdu_id_length,
2385 max_area,
2386 pdu_max_area));
2387
2388 if (ndo->ndo_vflag > 1) {
2389 if (!print_unknown_data(ndo, optr, "\n\t", 8)) /* provide the _o_riginal pointer */
2390 return (0); /* for optionally debugging the common header */
2391 }
2392 }
2393
2394 switch (pdu_type) {
2395
2396 case ISIS_PDU_L1_LAN_IIH:
2397 case ISIS_PDU_L2_LAN_IIH:
2398 if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) {
2399 ND_PRINT((ndo, ", bogus fixed header length %u should be %lu",
2400 fixed_len, (unsigned long)(ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)));
2401 return (0);
2402 }
2403 ND_TCHECK(*header_iih_lan);
2404 if (length < ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)
2405 goto trunc;
2406 if (ndo->ndo_vflag == 0) {
2407 ND_PRINT((ndo, ", src-id %s",
2408 isis_print_id(header_iih_lan->source_id, SYSTEM_ID_LEN)));
2409 ND_PRINT((ndo, ", lan-id %s, prio %u",
2410 isis_print_id(header_iih_lan->lan_id,NODE_ID_LEN),
2411 EXTRACT_U_1(header_iih_lan->priority)));
2412 ND_PRINT((ndo, ", length %u", length));
2413 return (1);
2414 }
2415 pdu_len=EXTRACT_BE_U_2(header_iih_lan->pdu_len);
2416 if (packet_len>pdu_len) {
2417 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2418 length=pdu_len;
2419 }
2420
2421 ND_PRINT((ndo, "\n\t source-id: %s, holding time: %us, Flags: [%s]",
2422 isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN),
2423 EXTRACT_BE_U_2(header_iih_lan->holding_time),
2424 tok2str(isis_iih_circuit_type_values,
2425 "unknown circuit type 0x%02x",
2426 EXTRACT_U_1(header_iih_lan->circuit_type))));
2427
2428 ND_PRINT((ndo, "\n\t lan-id: %s, Priority: %u, PDU length: %u",
2429 isis_print_id(header_iih_lan->lan_id, NODE_ID_LEN),
2430 EXTRACT_U_1(header_iih_lan->priority) & ISIS_LAN_PRIORITY_MASK,
2431 pdu_len));
2432
2433 if (ndo->ndo_vflag > 1) {
2434 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_IIH_LAN_HEADER_SIZE))
2435 return (0);
2436 }
2437
2438 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
2439 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
2440 break;
2441
2442 case ISIS_PDU_PTP_IIH:
2443 if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) {
2444 ND_PRINT((ndo, ", bogus fixed header length %u should be %lu",
2445 fixed_len, (unsigned long)(ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)));
2446 return (0);
2447 }
2448 ND_TCHECK(*header_iih_ptp);
2449 if (length < ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)
2450 goto trunc;
2451 if (ndo->ndo_vflag == 0) {
2452 ND_PRINT((ndo, ", src-id %s", isis_print_id(header_iih_ptp->source_id, SYSTEM_ID_LEN)));
2453 ND_PRINT((ndo, ", length %u", length));
2454 return (1);
2455 }
2456 pdu_len=EXTRACT_BE_U_2(header_iih_ptp->pdu_len);
2457 if (packet_len>pdu_len) {
2458 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2459 length=pdu_len;
2460 }
2461
2462 ND_PRINT((ndo, "\n\t source-id: %s, holding time: %us, Flags: [%s]",
2463 isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN),
2464 EXTRACT_BE_U_2(header_iih_ptp->holding_time),
2465 tok2str(isis_iih_circuit_type_values,
2466 "unknown circuit type 0x%02x",
2467 EXTRACT_U_1(header_iih_ptp->circuit_type))));
2468
2469 ND_PRINT((ndo, "\n\t circuit-id: 0x%02x, PDU length: %u",
2470 EXTRACT_U_1(header_iih_ptp->circuit_id),
2471 pdu_len));
2472
2473 if (ndo->ndo_vflag > 1) {
2474 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_IIH_PTP_HEADER_SIZE))
2475 return (0);
2476 }
2477
2478 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
2479 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
2480 break;
2481
2482 case ISIS_PDU_L1_LSP:
2483 case ISIS_PDU_L2_LSP:
2484 if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) {
2485 ND_PRINT((ndo, ", bogus fixed header length %u should be %lu",
2486 fixed_len, (unsigned long)ISIS_LSP_HEADER_SIZE));
2487 return (0);
2488 }
2489 ND_TCHECK(*header_lsp);
2490 if (length < ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)
2491 goto trunc;
2492 if (ndo->ndo_vflag == 0) {
2493 ND_PRINT((ndo, ", lsp-id %s, seq 0x%08x, lifetime %5us",
2494 isis_print_id(header_lsp->lsp_id, LSP_ID_LEN),
2495 EXTRACT_BE_U_4(header_lsp->sequence_number),
2496 EXTRACT_BE_U_2(header_lsp->remaining_lifetime)));
2497 ND_PRINT((ndo, ", length %u", length));
2498 return (1);
2499 }
2500 pdu_len=EXTRACT_BE_U_2(header_lsp->pdu_len);
2501 if (packet_len>pdu_len) {
2502 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2503 length=pdu_len;
2504 }
2505
2506 ND_PRINT((ndo, "\n\t lsp-id: %s, seq: 0x%08x, lifetime: %5us\n\t chksum: 0x%04x",
2507 isis_print_id(header_lsp->lsp_id, LSP_ID_LEN),
2508 EXTRACT_BE_U_4(header_lsp->sequence_number),
2509 EXTRACT_BE_U_2(header_lsp->remaining_lifetime),
2510 EXTRACT_BE_U_2(header_lsp->checksum)));
2511
2512 osi_print_cksum(ndo, (const uint8_t *)header_lsp->lsp_id,
2513 EXTRACT_BE_U_2(header_lsp->checksum),
2514 12, length-12);
2515
2516 ND_PRINT((ndo, ", PDU length: %u, Flags: [ %s",
2517 pdu_len,
2518 ISIS_MASK_LSP_OL_BIT(header_lsp->typeblock) ? "Overload bit set, " : ""));
2519
2520 if (ISIS_MASK_LSP_ATT_BITS(header_lsp->typeblock)) {
2521 ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : ""));
2522 ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : ""));
2523 ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : ""));
2524 ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : ""));
2525 ND_PRINT((ndo, "ATT bit set, "));
2526 }
2527 ND_PRINT((ndo, "%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : ""));
2528 ND_PRINT((ndo, "%s ]", tok2str(isis_lsp_istype_values, "Unknown(0x%x)",
2529 ISIS_MASK_LSP_ISTYPE_BITS(header_lsp->typeblock))));
2530
2531 if (ndo->ndo_vflag > 1) {
2532 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_LSP_HEADER_SIZE))
2533 return (0);
2534 }
2535
2536 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
2537 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
2538 break;
2539
2540 case ISIS_PDU_L1_CSNP:
2541 case ISIS_PDU_L2_CSNP:
2542 if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) {
2543 ND_PRINT((ndo, ", bogus fixed header length %u should be %lu",
2544 fixed_len, (unsigned long)(ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)));
2545 return (0);
2546 }
2547 ND_TCHECK(*header_csnp);
2548 if (length < ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)
2549 goto trunc;
2550 if (ndo->ndo_vflag == 0) {
2551 ND_PRINT((ndo, ", src-id %s", isis_print_id(header_csnp->source_id, NODE_ID_LEN)));
2552 ND_PRINT((ndo, ", length %u", length));
2553 return (1);
2554 }
2555 pdu_len=EXTRACT_BE_U_2(header_csnp->pdu_len);
2556 if (packet_len>pdu_len) {
2557 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2558 length=pdu_len;
2559 }
2560
2561 ND_PRINT((ndo, "\n\t source-id: %s, PDU length: %u",
2562 isis_print_id(header_csnp->source_id, NODE_ID_LEN),
2563 pdu_len));
2564 ND_PRINT((ndo, "\n\t start lsp-id: %s",
2565 isis_print_id(header_csnp->start_lsp_id, LSP_ID_LEN)));
2566 ND_PRINT((ndo, "\n\t end lsp-id: %s",
2567 isis_print_id(header_csnp->end_lsp_id, LSP_ID_LEN)));
2568
2569 if (ndo->ndo_vflag > 1) {
2570 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_CSNP_HEADER_SIZE))
2571 return (0);
2572 }
2573
2574 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
2575 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
2576 break;
2577
2578 case ISIS_PDU_L1_PSNP:
2579 case ISIS_PDU_L2_PSNP:
2580 if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) {
2581 ND_PRINT((ndo, "- bogus fixed header length %u should be %lu",
2582 fixed_len, (unsigned long)(ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)));
2583 return (0);
2584 }
2585 ND_TCHECK(*header_psnp);
2586 if (length < ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)
2587 goto trunc;
2588 if (ndo->ndo_vflag == 0) {
2589 ND_PRINT((ndo, ", src-id %s", isis_print_id(header_psnp->source_id, NODE_ID_LEN)));
2590 ND_PRINT((ndo, ", length %u", length));
2591 return (1);
2592 }
2593 pdu_len=EXTRACT_BE_U_2(header_psnp->pdu_len);
2594 if (packet_len>pdu_len) {
2595 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2596 length=pdu_len;
2597 }
2598
2599 ND_PRINT((ndo, "\n\t source-id: %s, PDU length: %u",
2600 isis_print_id(header_psnp->source_id, NODE_ID_LEN),
2601 pdu_len));
2602
2603 if (ndo->ndo_vflag > 1) {
2604 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_PSNP_HEADER_SIZE))
2605 return (0);
2606 }
2607
2608 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
2609 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
2610 break;
2611
2612 default:
2613 if (ndo->ndo_vflag == 0) {
2614 ND_PRINT((ndo, ", length %u", length));
2615 return (1);
2616 }
2617 (void)print_unknown_data(ndo, pptr, "\n\t ", length);
2618 return (0);
2619 }
2620
2621 /*
2622 * Now print the TLV's.
2623 */
2624
2625 while (packet_len > 0) {
2626 ND_TCHECK_2(pptr);
2627 if (packet_len < 2)
2628 goto trunc;
2629 tlv_type = EXTRACT_U_1(pptr);
2630 tlv_len = EXTRACT_U_1(pptr + 1);
2631 pptr += 2;
2632 packet_len -= 2;
2633 tmp =tlv_len; /* copy temporary len & pointer to packet data */
2634 tptr = pptr;
2635
2636 /* first lets see if we know the TLVs name*/
2637 ND_PRINT((ndo, "\n\t %s TLV #%u, length: %u",
2638 tok2str(isis_tlv_values,
2639 "unknown",
2640 tlv_type),
2641 tlv_type,
2642 tlv_len));
2643
2644 if (tlv_len == 0) /* something is invalid */
2645 continue;
2646
2647 if (packet_len < tlv_len)
2648 goto trunc;
2649
2650 /* now check if we have a decoder otherwise do a hexdump at the end*/
2651 switch (tlv_type) {
2652 case ISIS_TLV_AREA_ADDR:
2653 ND_TCHECK_1(tptr);
2654 alen = EXTRACT_U_1(tptr);
2655 tptr++;
2656 while (tmp && alen < tmp) {
2657 ND_TCHECK_LEN(tptr, alen);
2658 ND_PRINT((ndo, "\n\t Area address (length: %u): %s",
2659 alen,
2660 isonsap_string(ndo, tptr, alen)));
2661 tptr += alen;
2662 tmp -= alen + 1;
2663 if (tmp==0) /* if this is the last area address do not attemt a boundary check */
2664 break;
2665 ND_TCHECK_1(tptr);
2666 alen = EXTRACT_U_1(tptr);
2667 tptr++;
2668 }
2669 break;
2670 case ISIS_TLV_ISNEIGH:
2671 while (tmp >= MAC_ADDR_LEN) {
2672 ND_TCHECK_LEN(tptr, MAC_ADDR_LEN);
2673 ND_PRINT((ndo, "\n\t SNPA: %s", isis_print_id(tptr, MAC_ADDR_LEN)));
2674 tmp -= MAC_ADDR_LEN;
2675 tptr += MAC_ADDR_LEN;
2676 }
2677 break;
2678
2679 case ISIS_TLV_ISNEIGH_VARLEN:
2680 if (!ND_TTEST_1(tptr) || tmp < 3) /* min. TLV length */
2681 goto trunctlv;
2682 lan_alen = EXTRACT_U_1(tptr); /* LAN address length */
2683 tptr++;
2684 if (lan_alen == 0) {
2685 ND_PRINT((ndo, "\n\t LAN address length 0 bytes (invalid)"));
2686 break;
2687 }
2688 tmp --;
2689 ND_PRINT((ndo, "\n\t LAN address length %u bytes ", lan_alen));
2690 while (tmp >= lan_alen) {
2691 ND_TCHECK_LEN(tptr, lan_alen);
2692 ND_PRINT((ndo, "\n\t\tIS Neighbor: %s", isis_print_id(tptr, lan_alen)));
2693 tmp -= lan_alen;
2694 tptr +=lan_alen;
2695 }
2696 break;
2697
2698 case ISIS_TLV_PADDING:
2699 break;
2700
2701 case ISIS_TLV_MT_IS_REACH:
2702 mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
2703 if (mt_len == 0) /* did something go wrong ? */
2704 goto trunctlv;
2705 tptr+=mt_len;
2706 tmp-=mt_len;
2707 while (tmp >= 2+NODE_ID_LEN+3+1) {
2708 ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type, tmp);
2709 if (ext_is_len == 0) /* did something go wrong ? */
2710 goto trunctlv;
2711
2712 tmp-=ext_is_len;
2713 tptr+=ext_is_len;
2714 }
2715 break;
2716
2717 case ISIS_TLV_IS_ALIAS_ID:
2718 while (tmp >= NODE_ID_LEN+1) { /* is it worth attempting a decode ? */
2719 ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type, tmp);
2720 if (ext_is_len == 0) /* did something go wrong ? */
2721 goto trunctlv;
2722 tmp-=ext_is_len;
2723 tptr+=ext_is_len;
2724 }
2725 break;
2726
2727 case ISIS_TLV_EXT_IS_REACH:
2728 while (tmp >= NODE_ID_LEN+3+1) { /* is it worth attempting a decode ? */
2729 ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type, tmp);
2730 if (ext_is_len == 0) /* did something go wrong ? */
2731 goto trunctlv;
2732 tmp-=ext_is_len;
2733 tptr+=ext_is_len;
2734 }
2735 break;
2736 case ISIS_TLV_IS_REACH:
2737 ND_TCHECK_1(tptr); /* check if there is one byte left to read out the virtual flag */
2738 ND_PRINT((ndo, "\n\t %s",
2739 tok2str(isis_is_reach_virtual_values,
2740 "bogus virtual flag 0x%02x",
2741 EXTRACT_U_1(tptr))));
2742 tptr++;
2743 tlv_is_reach = (const struct isis_tlv_is_reach *)tptr;
2744 while (tmp >= sizeof(struct isis_tlv_is_reach)) {
2745 ND_TCHECK(*tlv_is_reach);
2746 ND_PRINT((ndo, "\n\t IS Neighbor: %s",
2747 isis_print_id(tlv_is_reach->neighbor_nodeid, NODE_ID_LEN)));
2748 isis_print_metric_block(ndo, &tlv_is_reach->isis_metric_block);
2749 tmp -= sizeof(struct isis_tlv_is_reach);
2750 tlv_is_reach++;
2751 }
2752 break;
2753
2754 case ISIS_TLV_ESNEIGH:
2755 tlv_es_reach = (const struct isis_tlv_es_reach *)tptr;
2756 while (tmp >= sizeof(struct isis_tlv_es_reach)) {
2757 ND_TCHECK(*tlv_es_reach);
2758 ND_PRINT((ndo, "\n\t ES Neighbor: %s",
2759 isis_print_id(tlv_es_reach->neighbor_sysid, SYSTEM_ID_LEN)));
2760 isis_print_metric_block(ndo, &tlv_es_reach->isis_metric_block);
2761 tmp -= sizeof(struct isis_tlv_es_reach);
2762 tlv_es_reach++;
2763 }
2764 break;
2765
2766 /* those two TLVs share the same format */
2767 case ISIS_TLV_INT_IP_REACH:
2768 case ISIS_TLV_EXT_IP_REACH:
2769 if (!isis_print_tlv_ip_reach(ndo, pptr, "\n\t ", tlv_len))
2770 return (1);
2771 break;
2772
2773 case ISIS_TLV_EXTD_IP_REACH:
2774 while (tmp>0) {
2775 ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET);
2776 if (ext_ip_len == 0) /* did something go wrong ? */
2777 goto trunctlv;
2778 tptr+=ext_ip_len;
2779 tmp-=ext_ip_len;
2780 }
2781 break;
2782
2783 case ISIS_TLV_MT_IP_REACH:
2784 mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
2785 if (mt_len == 0) { /* did something go wrong ? */
2786 goto trunctlv;
2787 }
2788 tptr+=mt_len;
2789 tmp-=mt_len;
2790
2791 while (tmp>0) {
2792 ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET);
2793 if (ext_ip_len == 0) /* did something go wrong ? */
2794 goto trunctlv;
2795 tptr+=ext_ip_len;
2796 tmp-=ext_ip_len;
2797 }
2798 break;
2799
2800 case ISIS_TLV_IP6_REACH:
2801 while (tmp>0) {
2802 ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET6);
2803 if (ext_ip_len == 0) /* did something go wrong ? */
2804 goto trunctlv;
2805 tptr+=ext_ip_len;
2806 tmp-=ext_ip_len;
2807 }
2808 break;
2809
2810 case ISIS_TLV_MT_IP6_REACH:
2811 mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
2812 if (mt_len == 0) { /* did something go wrong ? */
2813 goto trunctlv;
2814 }
2815 tptr+=mt_len;
2816 tmp-=mt_len;
2817
2818 while (tmp>0) {
2819 ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET6);
2820 if (ext_ip_len == 0) /* did something go wrong ? */
2821 goto trunctlv;
2822 tptr+=ext_ip_len;
2823 tmp-=ext_ip_len;
2824 }
2825 break;
2826
2827 case ISIS_TLV_IP6ADDR:
2828 while (tmp>=sizeof(struct in6_addr)) {
2829 ND_TCHECK_LEN(tptr, sizeof(struct in6_addr));
2830
2831 ND_PRINT((ndo, "\n\t IPv6 interface address: %s",
2832 ip6addr_string(ndo, tptr)));
2833
2834 tptr += sizeof(struct in6_addr);
2835 tmp -= sizeof(struct in6_addr);
2836 }
2837 break;
2838 case ISIS_TLV_AUTH:
2839 ND_TCHECK_1(tptr);
2840
2841 ND_PRINT((ndo, "\n\t %s: ",
2842 tok2str(isis_subtlv_auth_values,
2843 "unknown Authentication type 0x%02x",
2844 EXTRACT_U_1(tptr))));
2845
2846 switch (EXTRACT_U_1(tptr)) {
2847 case ISIS_SUBTLV_AUTH_SIMPLE:
2848 if (fn_printzp(ndo, tptr + 1, tlv_len - 1, ndo->ndo_snapend))
2849 goto trunctlv;
2850 break;
2851 case ISIS_SUBTLV_AUTH_MD5:
2852 for(i=1;i<tlv_len;i++) {
2853 ND_TCHECK_1(tptr + i);
2854 ND_PRINT((ndo, "%02x", EXTRACT_U_1(tptr + i)));
2855 }
2856 if (tlv_len != ISIS_SUBTLV_AUTH_MD5_LEN+1)
2857 ND_PRINT((ndo, ", (invalid subTLV) "));
2858
2859 sigcheck = signature_verify(ndo, optr, length, tptr + 1,
2860 isis_clear_checksum_lifetime,
2861 header_lsp);
2862 ND_PRINT((ndo, " (%s)", tok2str(signature_check_values, "Unknown", sigcheck)));
2863
2864 break;
2865 case ISIS_SUBTLV_AUTH_GENERIC:
2866 ND_TCHECK_2(tptr + 1);
2867 key_id = EXTRACT_BE_U_2(tptr + 1);
2868 ND_PRINT((ndo, "%u, password: ", key_id));
2869 for(i=1 + sizeof(uint16_t);i<tlv_len;i++) {
2870 ND_TCHECK_1(tptr + i);
2871 ND_PRINT((ndo, "%02x", EXTRACT_U_1(tptr + i)));
2872 }
2873 break;
2874 case ISIS_SUBTLV_AUTH_PRIVATE:
2875 default:
2876 if (!print_unknown_data(ndo, tptr + 1, "\n\t\t ", tlv_len - 1))
2877 return(0);
2878 break;
2879 }
2880 break;
2881
2882 case ISIS_TLV_PTP_ADJ:
2883 tlv_ptp_adj = (const struct isis_tlv_ptp_adj *)tptr;
2884 if(tmp>=1) {
2885 ND_TCHECK_1(tptr);
2886 ND_PRINT((ndo, "\n\t Adjacency State: %s (%u)",
2887 tok2str(isis_ptp_adjancey_values, "unknown", EXTRACT_U_1(tptr)),
2888 EXTRACT_U_1(tptr)));
2889 tmp--;
2890 }
2891 if(tmp>sizeof(tlv_ptp_adj->extd_local_circuit_id)) {
2892 ND_TCHECK(tlv_ptp_adj->extd_local_circuit_id);
2893 ND_PRINT((ndo, "\n\t Extended Local circuit-ID: 0x%08x",
2894 EXTRACT_BE_U_4(tlv_ptp_adj->extd_local_circuit_id)));
2895 tmp-=sizeof(tlv_ptp_adj->extd_local_circuit_id);
2896 }
2897 if(tmp>=SYSTEM_ID_LEN) {
2898 ND_TCHECK_LEN(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN);
2899 ND_PRINT((ndo, "\n\t Neighbor System-ID: %s",
2900 isis_print_id(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN)));
2901 tmp-=SYSTEM_ID_LEN;
2902 }
2903 if(tmp>=sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)) {
2904 ND_TCHECK(tlv_ptp_adj->neighbor_extd_local_circuit_id);
2905 ND_PRINT((ndo, "\n\t Neighbor Extended Local circuit-ID: 0x%08x",
2906 EXTRACT_BE_U_4(tlv_ptp_adj->neighbor_extd_local_circuit_id)));
2907 }
2908 break;
2909
2910 case ISIS_TLV_PROTOCOLS:
2911 ND_PRINT((ndo, "\n\t NLPID(s): "));
2912 while (tmp>0) {
2913 ND_TCHECK_1(tptr);
2914 ND_PRINT((ndo, "%s (0x%02x)",
2915 tok2str(nlpid_values,
2916 "unknown",
2917 EXTRACT_U_1(tptr)),
2918 EXTRACT_U_1(tptr)));
2919 if (tmp>1) /* further NPLIDs ? - put comma */
2920 ND_PRINT((ndo, ", "));
2921 tptr++;
2922 tmp--;
2923 }
2924 break;
2925
2926 case ISIS_TLV_MT_PORT_CAP:
2927 {
2928 ND_TCHECK_2(tptr);
2929
2930 ND_PRINT((ndo, "\n\t RES: %u, MTID(s): %u",
2931 (EXTRACT_BE_U_2(tptr) >> 12),
2932 (EXTRACT_BE_U_2(tptr) & 0x0fff)));
2933
2934 tmp = tmp-2;
2935 tptr = tptr+2;
2936
2937 if (tmp)
2938 isis_print_mt_port_cap_subtlv(ndo, tptr, tmp);
2939
2940 break;
2941 }
2942
2943 case ISIS_TLV_MT_CAPABILITY:
2944
2945 ND_TCHECK_2(tptr);
2946
2947 ND_PRINT((ndo, "\n\t O: %u, RES: %u, MTID(s): %u",
2948 (EXTRACT_BE_U_2(tptr) >> 15) & 0x01,
2949 (EXTRACT_BE_U_2(tptr) >> 12) & 0x07,
2950 EXTRACT_BE_U_2(tptr) & 0x0fff));
2951
2952 tmp = tmp-2;
2953 tptr = tptr+2;
2954
2955 if (tmp)
2956 isis_print_mt_capability_subtlv(ndo, tptr, tmp);
2957
2958 break;
2959
2960 case ISIS_TLV_TE_ROUTER_ID:
2961 ND_TCHECK_LEN(pptr, sizeof(struct in_addr));
2962 ND_PRINT((ndo, "\n\t Traffic Engineering Router ID: %s", ipaddr_string(ndo, pptr)));
2963 break;
2964
2965 case ISIS_TLV_IPADDR:
2966 while (tmp>=sizeof(struct in_addr)) {
2967 ND_TCHECK_LEN(tptr, sizeof(struct in_addr));
2968 ND_PRINT((ndo, "\n\t IPv4 interface address: %s", ipaddr_string(ndo, tptr)));
2969 tptr += sizeof(struct in_addr);
2970 tmp -= sizeof(struct in_addr);
2971 }
2972 break;
2973
2974 case ISIS_TLV_HOSTNAME:
2975 ND_PRINT((ndo, "\n\t Hostname: "));
2976 if (fn_printzp(ndo, tptr, tmp, ndo->ndo_snapend))
2977 goto trunctlv;
2978 break;
2979
2980 case ISIS_TLV_SHARED_RISK_GROUP:
2981 if (tmp < NODE_ID_LEN)
2982 break;
2983 ND_TCHECK_LEN(tptr, NODE_ID_LEN);
2984 ND_PRINT((ndo, "\n\t IS Neighbor: %s", isis_print_id(tptr, NODE_ID_LEN)));
2985 tptr+=NODE_ID_LEN;
2986 tmp-=NODE_ID_LEN;
2987
2988 if (tmp < 1)
2989 break;
2990 ND_TCHECK_1(tptr);
2991 ND_PRINT((ndo, ", Flags: [%s]", ISIS_MASK_TLV_SHARED_RISK_GROUP(EXTRACT_U_1(tptr)) ? "numbered" : "unnumbered"));
2992 tptr++;
2993 tmp--;
2994
2995 if (tmp < sizeof(struct in_addr))
2996 break;
2997 ND_TCHECK_LEN(tptr, sizeof(struct in_addr));
2998 ND_PRINT((ndo, "\n\t IPv4 interface address: %s", ipaddr_string(ndo, tptr)));
2999 tptr+=sizeof(struct in_addr);
3000 tmp-=sizeof(struct in_addr);
3001
3002 if (tmp < sizeof(struct in_addr))
3003 break;
3004 ND_TCHECK_LEN(tptr, sizeof(struct in_addr));
3005 ND_PRINT((ndo, "\n\t IPv4 neighbor address: %s", ipaddr_string(ndo, tptr)));
3006 tptr+=sizeof(struct in_addr);
3007 tmp-=sizeof(struct in_addr);
3008
3009 while (tmp>=4) {
3010 ND_TCHECK_4(tptr);
3011 ND_PRINT((ndo, "\n\t Link-ID: 0x%08x", EXTRACT_BE_U_4(tptr)));
3012 tptr+=4;
3013 tmp-=4;
3014 }
3015 break;
3016
3017 case ISIS_TLV_LSP:
3018 tlv_lsp = (const struct isis_tlv_lsp *)tptr;
3019 while(tmp>=sizeof(struct isis_tlv_lsp)) {
3020 ND_TCHECK((tlv_lsp->lsp_id)[LSP_ID_LEN-1]);
3021 ND_PRINT((ndo, "\n\t lsp-id: %s",
3022 isis_print_id(tlv_lsp->lsp_id, LSP_ID_LEN)));
3023 ND_TCHECK_LEN(tlv_lsp->sequence_number, 4);
3024 ND_PRINT((ndo, ", seq: 0x%08x", EXTRACT_BE_U_4(tlv_lsp->sequence_number)));
3025 ND_TCHECK_LEN(tlv_lsp->remaining_lifetime, 2);
3026 ND_PRINT((ndo, ", lifetime: %5ds", EXTRACT_BE_U_2(tlv_lsp->remaining_lifetime)));
3027 ND_TCHECK_LEN(tlv_lsp->checksum, 2);
3028 ND_PRINT((ndo, ", chksum: 0x%04x", EXTRACT_BE_U_2(tlv_lsp->checksum)));
3029 tmp-=sizeof(struct isis_tlv_lsp);
3030 tlv_lsp++;
3031 }
3032 break;
3033
3034 case ISIS_TLV_CHECKSUM:
3035 if (tmp < ISIS_TLV_CHECKSUM_MINLEN)
3036 break;
3037 ND_TCHECK_LEN(tptr, ISIS_TLV_CHECKSUM_MINLEN);
3038 ND_PRINT((ndo, "\n\t checksum: 0x%04x ", EXTRACT_BE_U_2(tptr)));
3039 /* do not attempt to verify the checksum if it is zero
3040 * most likely a HMAC-MD5 TLV is also present and
3041 * to avoid conflicts the checksum TLV is zeroed.
3042 * see rfc3358 for details
3043 */
3044 osi_print_cksum(ndo, optr, EXTRACT_BE_U_2(tptr), tptr-optr,
3045 length);
3046 break;
3047
3048 case ISIS_TLV_POI:
3049 if (tlv_len >= SYSTEM_ID_LEN + 1) {
3050 ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN + 1);
3051 ND_PRINT((ndo, "\n\t Purge Originator System-ID: %s",
3052 isis_print_id(tptr + 1, SYSTEM_ID_LEN)));
3053 }
3054
3055 if (tlv_len == 2 * SYSTEM_ID_LEN + 1) {
3056 ND_TCHECK_LEN(tptr, 2 * SYSTEM_ID_LEN + 1);
3057 ND_PRINT((ndo, "\n\t Received from System-ID: %s",
3058 isis_print_id(tptr + SYSTEM_ID_LEN + 1, SYSTEM_ID_LEN)));
3059 }
3060 break;
3061
3062 case ISIS_TLV_MT_SUPPORTED:
3063 if (tmp < ISIS_TLV_MT_SUPPORTED_MINLEN)
3064 break;
3065 while (tmp>1) {
3066 /* length can only be a multiple of 2, otherwise there is
3067 something broken -> so decode down until length is 1 */
3068 if (tmp!=1) {
3069 mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
3070 if (mt_len == 0) /* did something go wrong ? */
3071 goto trunctlv;
3072 tptr+=mt_len;
3073 tmp-=mt_len;
3074 } else {
3075 ND_PRINT((ndo, "\n\t invalid MT-ID"));
3076 break;
3077 }
3078 }
3079 break;
3080
3081 case ISIS_TLV_RESTART_SIGNALING:
3082 /* first attempt to decode the flags */
3083 if (tmp < ISIS_TLV_RESTART_SIGNALING_FLAGLEN)
3084 break;
3085 ND_TCHECK_LEN(tptr, ISIS_TLV_RESTART_SIGNALING_FLAGLEN);
3086 ND_PRINT((ndo, "\n\t Flags [%s]",
3087 bittok2str(isis_restart_flag_values, "none", EXTRACT_U_1(tptr))));
3088 tptr+=ISIS_TLV_RESTART_SIGNALING_FLAGLEN;
3089 tmp-=ISIS_TLV_RESTART_SIGNALING_FLAGLEN;
3090
3091 /* is there anything other than the flags field? */
3092 if (tmp == 0)
3093 break;
3094
3095 if (tmp < ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN)
3096 break;
3097 ND_TCHECK_LEN(tptr, ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN);
3098
3099 ND_PRINT((ndo, ", Remaining holding time %us", EXTRACT_BE_U_2(tptr)));
3100 tptr+=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN;
3101 tmp-=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN;
3102
3103 /* is there an additional sysid field present ?*/
3104 if (tmp == SYSTEM_ID_LEN) {
3105 ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN);
3106 ND_PRINT((ndo, ", for %s", isis_print_id(tptr,SYSTEM_ID_LEN)));
3107 }
3108 break;
3109
3110 case ISIS_TLV_IDRP_INFO:
3111 if (tmp < ISIS_TLV_IDRP_INFO_MINLEN)
3112 break;
3113 ND_TCHECK_LEN(tptr, ISIS_TLV_IDRP_INFO_MINLEN);
3114 ND_PRINT((ndo, "\n\t Inter-Domain Information Type: %s",
3115 tok2str(isis_subtlv_idrp_values,
3116 "Unknown (0x%02x)",
3117 EXTRACT_U_1(tptr))));
3118 isis_subtlv_idrp = EXTRACT_U_1(tptr);
3119 tptr++;
3120 switch (isis_subtlv_idrp) {
3121 case ISIS_SUBTLV_IDRP_ASN:
3122 ND_TCHECK_2(tptr); /* fetch AS number */
3123 ND_PRINT((ndo, "AS Number: %u", EXTRACT_BE_U_2(tptr)));
3124 break;
3125 case ISIS_SUBTLV_IDRP_LOCAL:
3126 case ISIS_SUBTLV_IDRP_RES:
3127 default:
3128 if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_len - 1))
3129 return(0);
3130 break;
3131 }
3132 break;
3133
3134 case ISIS_TLV_LSP_BUFFERSIZE:
3135 if (tmp < ISIS_TLV_LSP_BUFFERSIZE_MINLEN)
3136 break;
3137 ND_TCHECK_LEN(tptr, ISIS_TLV_LSP_BUFFERSIZE_MINLEN);
3138 ND_PRINT((ndo, "\n\t LSP Buffersize: %u", EXTRACT_BE_U_2(tptr)));
3139 break;
3140
3141 case ISIS_TLV_PART_DIS:
3142 while (tmp >= SYSTEM_ID_LEN) {
3143 ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN);
3144 ND_PRINT((ndo, "\n\t %s", isis_print_id(tptr, SYSTEM_ID_LEN)));
3145 tptr+=SYSTEM_ID_LEN;
3146 tmp-=SYSTEM_ID_LEN;
3147 }
3148 break;
3149
3150 case ISIS_TLV_PREFIX_NEIGH:
3151 if (tmp < sizeof(struct isis_metric_block))
3152 break;
3153 ND_TCHECK_LEN(tptr, sizeof(struct isis_metric_block));
3154 ND_PRINT((ndo, "\n\t Metric Block"));
3155 isis_print_metric_block(ndo, (const struct isis_metric_block *)tptr);
3156 tptr+=sizeof(struct isis_metric_block);
3157 tmp-=sizeof(struct isis_metric_block);
3158
3159 while(tmp>0) {
3160 ND_TCHECK_1(tptr);
3161 prefix_len=EXTRACT_U_1(tptr); /* read out prefix length in semioctets*/
3162 tptr++;
3163 if (prefix_len < 2) {
3164 ND_PRINT((ndo, "\n\t\tAddress: prefix length %u < 2", prefix_len));
3165 break;
3166 }
3167 tmp--;
3168 if (tmp < prefix_len/2)
3169 break;
3170 ND_TCHECK_LEN(tptr, prefix_len / 2);
3171 ND_PRINT((ndo, "\n\t\tAddress: %s/%u",
3172 isonsap_string(ndo, tptr, prefix_len / 2), prefix_len * 4));
3173 tptr+=prefix_len/2;
3174 tmp-=prefix_len/2;
3175 }
3176 break;
3177
3178 case ISIS_TLV_IIH_SEQNR:
3179 if (tmp < ISIS_TLV_IIH_SEQNR_MINLEN)
3180 break;
3181 ND_TCHECK_LEN(tptr, ISIS_TLV_IIH_SEQNR_MINLEN); /* check if four bytes are on the wire */
3182 ND_PRINT((ndo, "\n\t Sequence number: %u", EXTRACT_BE_U_4(tptr)));
3183 break;
3184
3185 case ISIS_TLV_VENDOR_PRIVATE:
3186 if (tmp < ISIS_TLV_VENDOR_PRIVATE_MINLEN)
3187 break;
3188 ND_TCHECK_LEN(tptr, ISIS_TLV_VENDOR_PRIVATE_MINLEN); /* check if enough byte for a full oui */
3189 vendor_id = EXTRACT_BE_U_3(tptr);
3190 ND_PRINT((ndo, "\n\t Vendor: %s (%u)",
3191 tok2str(oui_values, "Unknown", vendor_id),
3192 vendor_id));
3193 tptr+=3;
3194 tmp-=3;
3195 if (tmp > 0) /* hexdump the rest */
3196 if (!print_unknown_data(ndo, tptr, "\n\t\t", tmp))
3197 return(0);
3198 break;
3199 /*
3200 * FIXME those are the defined TLVs that lack a decoder
3201 * you are welcome to contribute code ;-)
3202 */
3203
3204 case ISIS_TLV_DECNET_PHASE4:
3205 case ISIS_TLV_LUCENT_PRIVATE:
3206 case ISIS_TLV_IPAUTH:
3207 case ISIS_TLV_NORTEL_PRIVATE1:
3208 case ISIS_TLV_NORTEL_PRIVATE2:
3209
3210 default:
3211 if (ndo->ndo_vflag <= 1) {
3212 if (!print_unknown_data(ndo, pptr, "\n\t\t", tlv_len))
3213 return(0);
3214 }
3215 break;
3216 }
3217 /* do we want to see an additionally hexdump ? */
3218 if (ndo->ndo_vflag> 1) {
3219 if (!print_unknown_data(ndo, pptr, "\n\t ", tlv_len))
3220 return(0);
3221 }
3222
3223 pptr += tlv_len;
3224 packet_len -= tlv_len;
3225 }
3226
3227 if (packet_len != 0) {
3228 ND_PRINT((ndo, "\n\t %u straggler bytes", packet_len));
3229 }
3230 return (1);
3231
3232 trunc:
3233 ND_PRINT((ndo, "%s", tstr));
3234 return (1);
3235
3236 trunctlv:
3237 ND_PRINT((ndo, "\n\t\t"));
3238 ND_PRINT((ndo, "%s", tstr));
3239 return(1);
3240 }
3241
3242 static void
3243 osi_print_cksum(netdissect_options *ndo, const uint8_t *pptr,
3244 uint16_t checksum, int checksum_offset, u_int length)
3245 {
3246 uint16_t calculated_checksum;
3247
3248 /* do not attempt to verify the checksum if it is zero,
3249 * if the offset is nonsense,
3250 * or the base pointer is not sane
3251 */
3252 if (!checksum
3253 || checksum_offset < 0
3254 || !ND_TTEST_2(pptr + checksum_offset)
3255 || (u_int)checksum_offset > length
3256 || !ND_TTEST_LEN(pptr, length)) {
3257 ND_PRINT((ndo, " (unverified)"));
3258 } else {
3259 #if 0
3260 printf("\nosi_print_cksum: %p %u %u\n", pptr, checksum_offset, length);
3261 #endif
3262 calculated_checksum = create_osi_cksum(pptr, checksum_offset, length);
3263 if (checksum == calculated_checksum) {
3264 ND_PRINT((ndo, " (correct)"));
3265 } else {
3266 ND_PRINT((ndo, " (incorrect should be 0x%04x)", calculated_checksum));
3267 }
3268 }
3269 }
3270
3271 /*
3272 * Local Variables:
3273 * c-style: whitesmith
3274 * c-basic-offset: 8
3275 * End:
3276 */
[mirror] the TCPdump network dissector