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Clean up whitespaces/indentation
[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 (respective ITU version is at http://www.itu.int/rec/T-REC-X.233/en/)
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
54 /*
55 * IS-IS is defined in ISO 10589. Look there for protocol definitions.
56 */
57
58 #define SYSTEM_ID_LEN MAC_ADDR_LEN
59 #define NODE_ID_LEN (SYSTEM_ID_LEN+1)
60 #define LSP_ID_LEN (SYSTEM_ID_LEN+2)
61
62 #define ISIS_VERSION 1
63 #define ESIS_VERSION 1
64 #define CLNP_VERSION 1
65
66 #define ISIS_PDU_TYPE_MASK 0x1F
67 #define ESIS_PDU_TYPE_MASK 0x1F
68 #define CLNP_PDU_TYPE_MASK 0x1F
69 #define CLNP_FLAG_MASK 0xE0
70 #define ISIS_LAN_PRIORITY_MASK 0x7F
71
72 #define ISIS_PDU_L1_LAN_IIH 15
73 #define ISIS_PDU_L2_LAN_IIH 16
74 #define ISIS_PDU_PTP_IIH 17
75 #define ISIS_PDU_L1_LSP 18
76 #define ISIS_PDU_L2_LSP 20
77 #define ISIS_PDU_L1_CSNP 24
78 #define ISIS_PDU_L2_CSNP 25
79 #define ISIS_PDU_L1_PSNP 26
80 #define ISIS_PDU_L2_PSNP 27
81
82 static const struct tok isis_pdu_values[] = {
83 { ISIS_PDU_L1_LAN_IIH, "L1 Lan IIH"},
84 { ISIS_PDU_L2_LAN_IIH, "L2 Lan IIH"},
85 { ISIS_PDU_PTP_IIH, "p2p IIH"},
86 { ISIS_PDU_L1_LSP, "L1 LSP"},
87 { ISIS_PDU_L2_LSP, "L2 LSP"},
88 { ISIS_PDU_L1_CSNP, "L1 CSNP"},
89 { ISIS_PDU_L2_CSNP, "L2 CSNP"},
90 { ISIS_PDU_L1_PSNP, "L1 PSNP"},
91 { ISIS_PDU_L2_PSNP, "L2 PSNP"},
92 { 0, NULL}
93 };
94
95 /*
96 * A TLV is a tuple of a type, length and a value and is normally used for
97 * encoding information in all sorts of places. This is an enumeration of
98 * the well known types.
99 *
100 * list taken from rfc3359 plus some memory from veterans ;-)
101 */
102
103 #define ISIS_TLV_AREA_ADDR 1 /* iso10589 */
104 #define ISIS_TLV_IS_REACH 2 /* iso10589 */
105 #define ISIS_TLV_ESNEIGH 3 /* iso10589 */
106 #define ISIS_TLV_PART_DIS 4 /* iso10589 */
107 #define ISIS_TLV_PREFIX_NEIGH 5 /* iso10589 */
108 #define ISIS_TLV_ISNEIGH 6 /* iso10589 */
109 #define ISIS_TLV_ISNEIGH_VARLEN 7 /* iso10589 */
110 #define ISIS_TLV_PADDING 8 /* iso10589 */
111 #define ISIS_TLV_LSP 9 /* iso10589 */
112 #define ISIS_TLV_AUTH 10 /* iso10589, rfc3567 */
113 #define ISIS_TLV_CHECKSUM 12 /* rfc3358 */
114 #define ISIS_TLV_CHECKSUM_MINLEN 2
115 #define ISIS_TLV_POI 13 /* rfc6232 */
116 #define ISIS_TLV_LSP_BUFFERSIZE 14 /* iso10589 rev2 */
117 #define ISIS_TLV_LSP_BUFFERSIZE_MINLEN 2
118 #define ISIS_TLV_EXT_IS_REACH 22 /* rfc5305 */
119 #define ISIS_TLV_IS_ALIAS_ID 24 /* rfc5311 */
120 #define ISIS_TLV_DECNET_PHASE4 42
121 #define ISIS_TLV_LUCENT_PRIVATE 66
122 #define ISIS_TLV_INT_IP_REACH 128 /* rfc1195, rfc2966 */
123 #define ISIS_TLV_PROTOCOLS 129 /* rfc1195 */
124 #define ISIS_TLV_EXT_IP_REACH 130 /* rfc1195, rfc2966 */
125 #define ISIS_TLV_IDRP_INFO 131 /* rfc1195 */
126 #define ISIS_TLV_IDRP_INFO_MINLEN 1
127 #define ISIS_TLV_IPADDR 132 /* rfc1195 */
128 #define ISIS_TLV_IPAUTH 133 /* rfc1195 */
129 #define ISIS_TLV_TE_ROUTER_ID 134 /* rfc5305 */
130 #define ISIS_TLV_EXTD_IP_REACH 135 /* rfc5305 */
131 #define ISIS_TLV_HOSTNAME 137 /* rfc2763 */
132 #define ISIS_TLV_SHARED_RISK_GROUP 138 /* draft-ietf-isis-gmpls-extensions */
133 #define ISIS_TLV_MT_PORT_CAP 143 /* rfc6165 */
134 #define ISIS_TLV_MT_CAPABILITY 144 /* rfc6329 */
135 #define ISIS_TLV_NORTEL_PRIVATE1 176
136 #define ISIS_TLV_NORTEL_PRIVATE2 177
137 #define ISIS_TLV_RESTART_SIGNALING 211 /* rfc3847 */
138 #define ISIS_TLV_RESTART_SIGNALING_FLAGLEN 1
139 #define ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN 2
140 #define ISIS_TLV_MT_IS_REACH 222 /* draft-ietf-isis-wg-multi-topology-05 */
141 #define ISIS_TLV_MT_SUPPORTED 229 /* draft-ietf-isis-wg-multi-topology-05 */
142 #define ISIS_TLV_MT_SUPPORTED_MINLEN 2
143 #define ISIS_TLV_IP6ADDR 232 /* draft-ietf-isis-ipv6-02 */
144 #define ISIS_TLV_MT_IP_REACH 235 /* draft-ietf-isis-wg-multi-topology-05 */
145 #define ISIS_TLV_IP6_REACH 236 /* draft-ietf-isis-ipv6-02 */
146 #define ISIS_TLV_MT_IP6_REACH 237 /* draft-ietf-isis-wg-multi-topology-05 */
147 #define ISIS_TLV_PTP_ADJ 240 /* rfc3373 */
148 #define ISIS_TLV_IIH_SEQNR 241 /* draft-shen-isis-iih-sequence-00 */
149 #define ISIS_TLV_IIH_SEQNR_MINLEN 4
150 #define ISIS_TLV_VENDOR_PRIVATE 250 /* draft-ietf-isis-experimental-tlv-01 */
151 #define ISIS_TLV_VENDOR_PRIVATE_MINLEN 3
152
153 static const struct tok isis_tlv_values[] = {
154 { ISIS_TLV_AREA_ADDR, "Area address(es)"},
155 { ISIS_TLV_IS_REACH, "IS Reachability"},
156 { ISIS_TLV_ESNEIGH, "ES Neighbor(s)"},
157 { ISIS_TLV_PART_DIS, "Partition DIS"},
158 { ISIS_TLV_PREFIX_NEIGH, "Prefix Neighbors"},
159 { ISIS_TLV_ISNEIGH, "IS Neighbor(s)"},
160 { ISIS_TLV_ISNEIGH_VARLEN, "IS Neighbor(s) (variable length)"},
161 { ISIS_TLV_PADDING, "Padding"},
162 { ISIS_TLV_LSP, "LSP entries"},
163 { ISIS_TLV_AUTH, "Authentication"},
164 { ISIS_TLV_CHECKSUM, "Checksum"},
165 { ISIS_TLV_POI, "Purge Originator Identifier"},
166 { ISIS_TLV_LSP_BUFFERSIZE, "LSP Buffersize"},
167 { ISIS_TLV_EXT_IS_REACH, "Extended IS Reachability"},
168 { ISIS_TLV_IS_ALIAS_ID, "IS Alias ID"},
169 { ISIS_TLV_DECNET_PHASE4, "DECnet Phase IV"},
170 { ISIS_TLV_LUCENT_PRIVATE, "Lucent Proprietary"},
171 { ISIS_TLV_INT_IP_REACH, "IPv4 Internal Reachability"},
172 { ISIS_TLV_PROTOCOLS, "Protocols supported"},
173 { ISIS_TLV_EXT_IP_REACH, "IPv4 External Reachability"},
174 { ISIS_TLV_IDRP_INFO, "Inter-Domain Information Type"},
175 { ISIS_TLV_IPADDR, "IPv4 Interface address(es)"},
176 { ISIS_TLV_IPAUTH, "IPv4 authentication (deprecated)"},
177 { ISIS_TLV_TE_ROUTER_ID, "Traffic Engineering Router ID"},
178 { ISIS_TLV_EXTD_IP_REACH, "Extended IPv4 Reachability"},
179 { ISIS_TLV_SHARED_RISK_GROUP, "Shared Risk Link Group"},
180 { ISIS_TLV_MT_PORT_CAP, "Multi-Topology-Aware Port Capability"},
181 { ISIS_TLV_MT_CAPABILITY, "Multi-Topology Capability"},
182 { ISIS_TLV_NORTEL_PRIVATE1, "Nortel Proprietary"},
183 { ISIS_TLV_NORTEL_PRIVATE2, "Nortel Proprietary"},
184 { ISIS_TLV_HOSTNAME, "Hostname"},
185 { ISIS_TLV_RESTART_SIGNALING, "Restart Signaling"},
186 { ISIS_TLV_MT_IS_REACH, "Multi Topology IS Reachability"},
187 { ISIS_TLV_MT_SUPPORTED, "Multi Topology"},
188 { ISIS_TLV_IP6ADDR, "IPv6 Interface address(es)"},
189 { ISIS_TLV_MT_IP_REACH, "Multi-Topology IPv4 Reachability"},
190 { ISIS_TLV_IP6_REACH, "IPv6 reachability"},
191 { ISIS_TLV_MT_IP6_REACH, "Multi-Topology IP6 Reachability"},
192 { ISIS_TLV_PTP_ADJ, "Point-to-point Adjacency State"},
193 { ISIS_TLV_IIH_SEQNR, "Hello PDU Sequence Number"},
194 { ISIS_TLV_VENDOR_PRIVATE, "Vendor Private"},
195 { 0, NULL }
196 };
197
198 #define ESIS_OPTION_PROTOCOLS 129
199 #define ESIS_OPTION_QOS_MAINTENANCE 195 /* iso9542 */
200 #define ESIS_OPTION_SECURITY 197 /* iso9542 */
201 #define ESIS_OPTION_ES_CONF_TIME 198 /* iso9542 */
202 #define ESIS_OPTION_PRIORITY 205 /* iso9542 */
203 #define ESIS_OPTION_ADDRESS_MASK 225 /* iso9542 */
204 #define ESIS_OPTION_SNPA_MASK 226 /* iso9542 */
205
206 static const struct tok esis_option_values[] = {
207 { ESIS_OPTION_PROTOCOLS, "Protocols supported"},
208 { ESIS_OPTION_QOS_MAINTENANCE, "QoS Maintenance" },
209 { ESIS_OPTION_SECURITY, "Security" },
210 { ESIS_OPTION_ES_CONF_TIME, "ES Configuration Time" },
211 { ESIS_OPTION_PRIORITY, "Priority" },
212 { ESIS_OPTION_ADDRESS_MASK, "Addressk Mask" },
213 { ESIS_OPTION_SNPA_MASK, "SNPA Mask" },
214 { 0, NULL }
215 };
216
217 #define CLNP_OPTION_DISCARD_REASON 193
218 #define CLNP_OPTION_QOS_MAINTENANCE 195 /* iso8473 */
219 #define CLNP_OPTION_SECURITY 197 /* iso8473 */
220 #define CLNP_OPTION_SOURCE_ROUTING 200 /* iso8473 */
221 #define CLNP_OPTION_ROUTE_RECORDING 203 /* iso8473 */
222 #define CLNP_OPTION_PADDING 204 /* iso8473 */
223 #define CLNP_OPTION_PRIORITY 205 /* iso8473 */
224
225 static const struct tok clnp_option_values[] = {
226 { CLNP_OPTION_DISCARD_REASON, "Discard Reason"},
227 { CLNP_OPTION_PRIORITY, "Priority"},
228 { CLNP_OPTION_QOS_MAINTENANCE, "QoS Maintenance"},
229 { CLNP_OPTION_SECURITY, "Security"},
230 { CLNP_OPTION_SOURCE_ROUTING, "Source Routing"},
231 { CLNP_OPTION_ROUTE_RECORDING, "Route Recording"},
232 { CLNP_OPTION_PADDING, "Padding"},
233 { 0, NULL }
234 };
235
236 static const struct tok clnp_option_rfd_class_values[] = {
237 { 0x0, "General"},
238 { 0x8, "Address"},
239 { 0x9, "Source Routeing"},
240 { 0xa, "Lifetime"},
241 { 0xb, "PDU Discarded"},
242 { 0xc, "Reassembly"},
243 { 0, NULL }
244 };
245
246 static const struct tok clnp_option_rfd_general_values[] = {
247 { 0x0, "Reason not specified"},
248 { 0x1, "Protocol procedure error"},
249 { 0x2, "Incorrect checksum"},
250 { 0x3, "PDU discarded due to congestion"},
251 { 0x4, "Header syntax error (cannot be parsed)"},
252 { 0x5, "Segmentation needed but not permitted"},
253 { 0x6, "Incomplete PDU received"},
254 { 0x7, "Duplicate option"},
255 { 0, NULL }
256 };
257
258 static const struct tok clnp_option_rfd_address_values[] = {
259 { 0x0, "Destination address unreachable"},
260 { 0x1, "Destination address unknown"},
261 { 0, NULL }
262 };
263
264 static const struct tok clnp_option_rfd_source_routeing_values[] = {
265 { 0x0, "Unspecified source routeing error"},
266 { 0x1, "Syntax error in source routeing field"},
267 { 0x2, "Unknown address in source routeing field"},
268 { 0x3, "Path not acceptable"},
269 { 0, NULL }
270 };
271
272 static const struct tok clnp_option_rfd_lifetime_values[] = {
273 { 0x0, "Lifetime expired while data unit in transit"},
274 { 0x1, "Lifetime expired during reassembly"},
275 { 0, NULL }
276 };
277
278 static const struct tok clnp_option_rfd_pdu_discard_values[] = {
279 { 0x0, "Unsupported option not specified"},
280 { 0x1, "Unsupported protocol version"},
281 { 0x2, "Unsupported security option"},
282 { 0x3, "Unsupported source routeing option"},
283 { 0x4, "Unsupported recording of route option"},
284 { 0, NULL }
285 };
286
287 static const struct tok clnp_option_rfd_reassembly_values[] = {
288 { 0x0, "Reassembly interference"},
289 { 0, NULL }
290 };
291
292 /* array of 16 error-classes */
293 static const struct tok *clnp_option_rfd_error_class[] = {
294 clnp_option_rfd_general_values,
295 NULL,
296 NULL,
297 NULL,
298 NULL,
299 NULL,
300 NULL,
301 NULL,
302 clnp_option_rfd_address_values,
303 clnp_option_rfd_source_routeing_values,
304 clnp_option_rfd_lifetime_values,
305 clnp_option_rfd_pdu_discard_values,
306 clnp_option_rfd_reassembly_values,
307 NULL,
308 NULL,
309 NULL
310 };
311
312 #define CLNP_OPTION_OPTION_QOS_MASK 0x3f
313 #define CLNP_OPTION_SCOPE_MASK 0xc0
314 #define CLNP_OPTION_SCOPE_SA_SPEC 0x40
315 #define CLNP_OPTION_SCOPE_DA_SPEC 0x80
316 #define CLNP_OPTION_SCOPE_GLOBAL 0xc0
317
318 static const struct tok clnp_option_scope_values[] = {
319 { CLNP_OPTION_SCOPE_SA_SPEC, "Source Address Specific"},
320 { CLNP_OPTION_SCOPE_DA_SPEC, "Destination Address Specific"},
321 { CLNP_OPTION_SCOPE_GLOBAL, "Globally unique"},
322 { 0, NULL }
323 };
324
325 static const struct tok clnp_option_sr_rr_values[] = {
326 { 0x0, "partial"},
327 { 0x1, "complete"},
328 { 0, NULL }
329 };
330
331 static const struct tok clnp_option_sr_rr_string_values[] = {
332 { CLNP_OPTION_SOURCE_ROUTING, "source routing"},
333 { CLNP_OPTION_ROUTE_RECORDING, "recording of route in progress"},
334 { 0, NULL }
335 };
336
337 static const struct tok clnp_option_qos_global_values[] = {
338 { 0x20, "reserved"},
339 { 0x10, "sequencing vs. delay"},
340 { 0x08, "congested"},
341 { 0x04, "delay vs. cost"},
342 { 0x02, "error vs. delay"},
343 { 0x01, "error vs. cost"},
344 { 0, NULL }
345 };
346
347 #define ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP 3 /* rfc5305 */
348 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID 4 /* rfc4205 */
349 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID 5 /* rfc5305 */
350 #define ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR 6 /* rfc5305 */
351 #define ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR 8 /* rfc5305 */
352 #define ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW 9 /* rfc5305 */
353 #define ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW 10 /* rfc5305 */
354 #define ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW 11 /* rfc4124 */
355 #define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD 12 /* draft-ietf-tewg-diff-te-proto-06 */
356 #define ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC 18 /* rfc5305 */
357 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE 19 /* draft-ietf-isis-link-attr-01 */
358 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE 20 /* rfc4205 */
359 #define ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR 21 /* rfc4205 */
360 #define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS 22 /* rfc4124 */
361
362 #define ISIS_SUBTLV_SPB_METRIC 29 /* rfc6329 */
363
364 static const struct tok isis_ext_is_reach_subtlv_values[] = {
365 { ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP, "Administrative groups" },
366 { ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" },
367 { ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID, "Link Remote Identifier" },
368 { ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR, "IPv4 interface address" },
369 { ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR, "IPv4 neighbor address" },
370 { ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW, "Maximum link bandwidth" },
371 { ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW, "Reservable link bandwidth" },
372 { ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW, "Unreserved bandwidth" },
373 { ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC, "Traffic Engineering Metric" },
374 { ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE, "Link Attribute" },
375 { ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE, "Link Protection Type" },
376 { ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR, "Interface Switching Capability" },
377 { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD, "Bandwidth Constraints (old)" },
378 { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS, "Bandwidth Constraints" },
379 { ISIS_SUBTLV_SPB_METRIC, "SPB Metric" },
380 { 250, "Reserved for cisco specific extensions" },
381 { 251, "Reserved for cisco specific extensions" },
382 { 252, "Reserved for cisco specific extensions" },
383 { 253, "Reserved for cisco specific extensions" },
384 { 254, "Reserved for cisco specific extensions" },
385 { 255, "Reserved for future expansion" },
386 { 0, NULL }
387 };
388
389 #define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32 1 /* draft-ietf-isis-admin-tags-01 */
390 #define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64 2 /* draft-ietf-isis-admin-tags-01 */
391 #define ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR 117 /* draft-ietf-isis-wg-multi-topology-05 */
392
393 static const struct tok isis_ext_ip_reach_subtlv_values[] = {
394 { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32, "32-Bit Administrative tag" },
395 { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64, "64-Bit Administrative tag" },
396 { ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR, "Management Prefix Color" },
397 { 0, NULL }
398 };
399
400 static const struct tok isis_subtlv_link_attribute_values[] = {
401 { 0x01, "Local Protection Available" },
402 { 0x02, "Link excluded from local protection path" },
403 { 0x04, "Local maintenance required"},
404 { 0, NULL }
405 };
406
407 #define ISIS_SUBTLV_AUTH_SIMPLE 1
408 #define ISIS_SUBTLV_AUTH_GENERIC 3 /* rfc 5310 */
409 #define ISIS_SUBTLV_AUTH_MD5 54
410 #define ISIS_SUBTLV_AUTH_MD5_LEN 16
411 #define ISIS_SUBTLV_AUTH_PRIVATE 255
412
413 static const struct tok isis_subtlv_auth_values[] = {
414 { ISIS_SUBTLV_AUTH_SIMPLE, "simple text password"},
415 { ISIS_SUBTLV_AUTH_GENERIC, "Generic Crypto key-id"},
416 { ISIS_SUBTLV_AUTH_MD5, "HMAC-MD5 password"},
417 { ISIS_SUBTLV_AUTH_PRIVATE, "Routing Domain private password"},
418 { 0, NULL }
419 };
420
421 #define ISIS_SUBTLV_IDRP_RES 0
422 #define ISIS_SUBTLV_IDRP_LOCAL 1
423 #define ISIS_SUBTLV_IDRP_ASN 2
424
425 static const struct tok isis_subtlv_idrp_values[] = {
426 { ISIS_SUBTLV_IDRP_RES, "Reserved"},
427 { ISIS_SUBTLV_IDRP_LOCAL, "Routing-Domain Specific"},
428 { ISIS_SUBTLV_IDRP_ASN, "AS Number Tag"},
429 { 0, NULL}
430 };
431
432 #define ISIS_SUBTLV_SPB_MCID 4
433 #define ISIS_SUBTLV_SPB_DIGEST 5
434 #define ISIS_SUBTLV_SPB_BVID 6
435
436 #define ISIS_SUBTLV_SPB_INSTANCE 1
437 #define ISIS_SUBTLV_SPBM_SI 3
438
439 #define ISIS_SPB_MCID_LEN 51
440 #define ISIS_SUBTLV_SPB_MCID_MIN_LEN 102
441 #define ISIS_SUBTLV_SPB_DIGEST_MIN_LEN 33
442 #define ISIS_SUBTLV_SPB_BVID_MIN_LEN 6
443 #define ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN 19
444 #define ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN 8
445
446 static const struct tok isis_mt_port_cap_subtlv_values[] = {
447 { ISIS_SUBTLV_SPB_MCID, "SPB MCID" },
448 { ISIS_SUBTLV_SPB_DIGEST, "SPB Digest" },
449 { ISIS_SUBTLV_SPB_BVID, "SPB BVID" },
450 { 0, NULL }
451 };
452
453 static const struct tok isis_mt_capability_subtlv_values[] = {
454 { ISIS_SUBTLV_SPB_INSTANCE, "SPB Instance" },
455 { ISIS_SUBTLV_SPBM_SI, "SPBM Service Identifier and Unicast Address" },
456 { 0, NULL }
457 };
458
459 struct isis_spb_mcid {
460 nd_uint8_t format_id;
461 nd_byte name[32];
462 nd_uint16_t revision_lvl;
463 nd_byte digest[16];
464 };
465
466 struct isis_subtlv_spb_mcid {
467 struct isis_spb_mcid mcid;
468 struct isis_spb_mcid aux_mcid;
469 };
470
471 struct isis_subtlv_spb_instance {
472 nd_byte cist_root_id[8];
473 nd_uint32_t cist_external_root_path_cost;
474 nd_uint16_t bridge_priority;
475 nd_uint32_t spsourceid;
476 nd_uint8_t no_of_trees;
477 };
478
479 #define CLNP_SEGMENT_PART 0x80
480 #define CLNP_MORE_SEGMENTS 0x40
481 #define CLNP_REQUEST_ER 0x20
482
483 static const struct tok clnp_flag_values[] = {
484 { CLNP_SEGMENT_PART, "Segmentation permitted"},
485 { CLNP_MORE_SEGMENTS, "more Segments"},
486 { CLNP_REQUEST_ER, "request Error Report"},
487 { 0, NULL}
488 };
489
490 #define ISIS_MASK_LSP_OL_BIT(x) (EXTRACT_U_1(x)&0x4)
491 #define ISIS_MASK_LSP_ISTYPE_BITS(x) (EXTRACT_U_1(x)&0x3)
492 #define ISIS_MASK_LSP_PARTITION_BIT(x) (EXTRACT_U_1(x)&0x80)
493 #define ISIS_MASK_LSP_ATT_BITS(x) (EXTRACT_U_1(x)&0x78)
494 #define ISIS_MASK_LSP_ATT_ERROR_BIT(x) (EXTRACT_U_1(x)&0x40)
495 #define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x) (EXTRACT_U_1(x)&0x20)
496 #define ISIS_MASK_LSP_ATT_DELAY_BIT(x) (EXTRACT_U_1(x)&0x10)
497 #define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x) (EXTRACT_U_1(x)&0x8)
498
499 #define ISIS_MASK_MTID(x) ((x)&0x0fff)
500 #define ISIS_MASK_MTFLAGS(x) ((x)&0xf000)
501
502 static const struct tok isis_mt_flag_values[] = {
503 { 0x4000, "ATT bit set"},
504 { 0x8000, "Overload bit set"},
505 { 0, NULL}
506 };
507
508 #define ISIS_MASK_TLV_EXTD_IP_UPDOWN(x) ((x)&0x80)
509 #define ISIS_MASK_TLV_EXTD_IP_SUBTLV(x) ((x)&0x40)
510
511 #define ISIS_MASK_TLV_EXTD_IP6_IE(x) ((x)&0x40)
512 #define ISIS_MASK_TLV_EXTD_IP6_SUBTLV(x) ((x)&0x20)
513
514 #define ISIS_LSP_TLV_METRIC_SUPPORTED(x) (EXTRACT_U_1(x)&0x80)
515 #define ISIS_LSP_TLV_METRIC_IE(x) (EXTRACT_U_1(x)&0x40)
516 #define ISIS_LSP_TLV_METRIC_UPDOWN(x) (EXTRACT_U_1(x)&0x80)
517 #define ISIS_LSP_TLV_METRIC_VALUE(x) (EXTRACT_U_1(x)&0x3f)
518
519 #define ISIS_MASK_TLV_SHARED_RISK_GROUP(x) ((x)&0x1)
520
521 static const struct tok isis_mt_values[] = {
522 { 0, "IPv4 unicast"},
523 { 1, "In-Band Management"},
524 { 2, "IPv6 unicast"},
525 { 3, "Multicast"},
526 { 4095, "Development, Experimental or Proprietary"},
527 { 0, NULL }
528 };
529
530 static const struct tok isis_iih_circuit_type_values[] = {
531 { 1, "Level 1 only"},
532 { 2, "Level 2 only"},
533 { 3, "Level 1, Level 2"},
534 { 0, NULL}
535 };
536
537 #define ISIS_LSP_TYPE_UNUSED0 0
538 #define ISIS_LSP_TYPE_LEVEL_1 1
539 #define ISIS_LSP_TYPE_UNUSED2 2
540 #define ISIS_LSP_TYPE_LEVEL_2 3
541
542 static const struct tok isis_lsp_istype_values[] = {
543 { ISIS_LSP_TYPE_UNUSED0, "Unused 0x0 (invalid)"},
544 { ISIS_LSP_TYPE_LEVEL_1, "L1 IS"},
545 { ISIS_LSP_TYPE_UNUSED2, "Unused 0x2 (invalid)"},
546 { ISIS_LSP_TYPE_LEVEL_2, "L2 IS"},
547 { 0, NULL }
548 };
549
550 /*
551 * Katz's point to point adjacency TLV uses codes to tell us the state of
552 * the remote adjacency. Enumerate them.
553 */
554
555 #define ISIS_PTP_ADJ_UP 0
556 #define ISIS_PTP_ADJ_INIT 1
557 #define ISIS_PTP_ADJ_DOWN 2
558
559 static const struct tok isis_ptp_adjancey_values[] = {
560 { ISIS_PTP_ADJ_UP, "Up" },
561 { ISIS_PTP_ADJ_INIT, "Initializing" },
562 { ISIS_PTP_ADJ_DOWN, "Down" },
563 { 0, NULL}
564 };
565
566 struct isis_tlv_ptp_adj {
567 nd_uint8_t adjacency_state;
568 nd_uint32_t extd_local_circuit_id;
569 nd_byte neighbor_sysid[SYSTEM_ID_LEN];
570 nd_uint32_t neighbor_extd_local_circuit_id;
571 };
572
573 static void osi_print_cksum(netdissect_options *, const uint8_t *pptr,
574 uint16_t checksum, int checksum_offset, u_int length);
575 static int clnp_print(netdissect_options *, const uint8_t *, u_int);
576 static void esis_print(netdissect_options *, const uint8_t *, u_int);
577 static int isis_print(netdissect_options *, const uint8_t *, u_int);
578
579 struct isis_metric_block {
580 nd_uint8_t metric_default;
581 nd_uint8_t metric_delay;
582 nd_uint8_t metric_expense;
583 nd_uint8_t metric_error;
584 };
585
586 struct isis_tlv_is_reach {
587 struct isis_metric_block isis_metric_block;
588 nd_byte neighbor_nodeid[NODE_ID_LEN];
589 };
590
591 struct isis_tlv_es_reach {
592 struct isis_metric_block isis_metric_block;
593 nd_byte neighbor_sysid[SYSTEM_ID_LEN];
594 };
595
596 struct isis_tlv_ip_reach {
597 struct isis_metric_block isis_metric_block;
598 nd_ipv4 prefix;
599 nd_ipv4 mask;
600 };
601
602 static const struct tok isis_is_reach_virtual_values[] = {
603 { 0, "IsNotVirtual"},
604 { 1, "IsVirtual"},
605 { 0, NULL }
606 };
607
608 static const struct tok isis_restart_flag_values[] = {
609 { 0x1, "Restart Request"},
610 { 0x2, "Restart Acknowledgement"},
611 { 0x4, "Suppress adjacency advertisement"},
612 { 0, NULL }
613 };
614
615 struct isis_common_header {
616 nd_uint8_t nlpid;
617 nd_uint8_t fixed_len;
618 nd_uint8_t version; /* Protocol version */
619 nd_uint8_t id_length;
620 nd_uint8_t pdu_type; /* 3 MSbits are reserved */
621 nd_uint8_t pdu_version; /* Packet format version */
622 nd_byte reserved;
623 nd_uint8_t max_area;
624 };
625
626 struct isis_iih_lan_header {
627 nd_uint8_t circuit_type;
628 nd_byte source_id[SYSTEM_ID_LEN];
629 nd_uint16_t holding_time;
630 nd_uint16_t pdu_len;
631 nd_uint8_t priority;
632 nd_byte lan_id[NODE_ID_LEN];
633 };
634
635 struct isis_iih_ptp_header {
636 nd_uint8_t circuit_type;
637 nd_byte source_id[SYSTEM_ID_LEN];
638 nd_uint16_t holding_time;
639 nd_uint16_t pdu_len;
640 nd_uint8_t circuit_id;
641 };
642
643 struct isis_lsp_header {
644 nd_uint16_t pdu_len;
645 nd_uint16_t remaining_lifetime;
646 nd_byte lsp_id[LSP_ID_LEN];
647 nd_uint32_t sequence_number;
648 nd_uint16_t checksum;
649 nd_uint8_t typeblock;
650 };
651
652 struct isis_csnp_header {
653 nd_uint16_t pdu_len;
654 nd_byte source_id[NODE_ID_LEN];
655 nd_byte start_lsp_id[LSP_ID_LEN];
656 nd_byte end_lsp_id[LSP_ID_LEN];
657 };
658
659 struct isis_psnp_header {
660 nd_uint16_t pdu_len;
661 nd_byte source_id[NODE_ID_LEN];
662 };
663
664 struct isis_tlv_lsp {
665 nd_uint16_t remaining_lifetime;
666 nd_byte lsp_id[LSP_ID_LEN];
667 nd_uint32_t sequence_number;
668 nd_uint16_t checksum;
669 };
670
671 #define ISIS_COMMON_HEADER_SIZE (sizeof(struct isis_common_header))
672 #define ISIS_IIH_LAN_HEADER_SIZE (sizeof(struct isis_iih_lan_header))
673 #define ISIS_IIH_PTP_HEADER_SIZE (sizeof(struct isis_iih_ptp_header))
674 #define ISIS_LSP_HEADER_SIZE (sizeof(struct isis_lsp_header))
675 #define ISIS_CSNP_HEADER_SIZE (sizeof(struct isis_csnp_header))
676 #define ISIS_PSNP_HEADER_SIZE (sizeof(struct isis_psnp_header))
677
678 void
679 isoclns_print(netdissect_options *ndo, const u_char *p, u_int length)
680 {
681 ndo->ndo_protocol = "isoclns";
682 ND_TCHECK_1(p); /* enough bytes on the wire ? */
683
684 if (ndo->ndo_eflag)
685 ND_PRINT("OSI NLPID %s (0x%02x): ", tok2str(nlpid_values, "Unknown", EXTRACT_U_1(p)), EXTRACT_U_1(p));
686
687 switch (EXTRACT_U_1(p)) {
688
689 case NLPID_CLNP:
690 if (!clnp_print(ndo, p, length))
691 print_unknown_data(ndo, p, "\n\t", length);
692 break;
693
694 case NLPID_ESIS:
695 esis_print(ndo, p, length);
696 return;
697
698 case NLPID_ISIS:
699 if (!isis_print(ndo, p, length))
700 print_unknown_data(ndo, p, "\n\t", length);
701 break;
702
703 case NLPID_NULLNS:
704 ND_PRINT("%slength: %u", ndo->ndo_eflag ? "" : ", ", length);
705 break;
706
707 case NLPID_Q933:
708 q933_print(ndo, p + 1, length - 1);
709 break;
710
711 case NLPID_IP:
712 ip_print(ndo, p + 1, length - 1);
713 break;
714
715 case NLPID_IP6:
716 ip6_print(ndo, p + 1, length - 1);
717 break;
718
719 case NLPID_PPP:
720 ppp_print(ndo, p + 1, length - 1);
721 break;
722
723 default:
724 if (!ndo->ndo_eflag)
725 ND_PRINT("OSI NLPID 0x%02x unknown", EXTRACT_U_1(p));
726 ND_PRINT("%slength: %u", ndo->ndo_eflag ? "" : ", ", length);
727 if (length > 1)
728 print_unknown_data(ndo, p, "\n\t", length);
729 break;
730 }
731 return;
732 trunc:
733 nd_print_trunc(ndo);
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 ndo->ndo_protocol = "clnp";
783 clnp_header = (const struct clnp_header_t *) pptr;
784 ND_TCHECK_SIZE(clnp_header);
785
786 li = EXTRACT_U_1(clnp_header->length_indicator);
787 li_remaining = li;
788 optr = pptr;
789
790 if (!ndo->ndo_eflag)
791 ND_PRINT("CLNP");
792
793 /*
794 * Sanity checking of the header.
795 */
796
797 if (EXTRACT_U_1(clnp_header->version) != CLNP_VERSION) {
798 ND_PRINT("version %u packet not supported", EXTRACT_U_1(clnp_header->version));
799 return (0);
800 }
801
802 if (li > length) {
803 ND_PRINT(" length indicator(%u) > PDU size (%u)!", li, length);
804 return (0);
805 }
806
807 if (li < sizeof(struct clnp_header_t)) {
808 ND_PRINT(" length indicator %u < min PDU size:", li);
809 while (pptr < ndo->ndo_snapend) {
810 ND_PRINT("%02X", EXTRACT_U_1(pptr));
811 pptr++;
812 }
813 return (0);
814 }
815
816 /* FIXME further header sanity checking */
817
818 clnp_pdu_type = EXTRACT_U_1(clnp_header->type) & CLNP_PDU_TYPE_MASK;
819 clnp_flags = EXTRACT_U_1(clnp_header->type) & CLNP_FLAG_MASK;
820
821 pptr += sizeof(struct clnp_header_t);
822 li_remaining -= sizeof(struct clnp_header_t);
823
824 if (li_remaining < 1) {
825 ND_PRINT("li < size of fixed part of CLNP header and addresses");
826 return (0);
827 }
828 ND_TCHECK_1(pptr);
829 dest_address_length = EXTRACT_U_1(pptr);
830 pptr += 1;
831 li_remaining -= 1;
832 if (li_remaining < dest_address_length) {
833 ND_PRINT("li < size of fixed part of CLNP header and addresses");
834 return (0);
835 }
836 ND_TCHECK_LEN(pptr, dest_address_length);
837 dest_address = pptr;
838 pptr += dest_address_length;
839 li_remaining -= dest_address_length;
840
841 if (li_remaining < 1) {
842 ND_PRINT("li < size of fixed part of CLNP header and addresses");
843 return (0);
844 }
845 ND_TCHECK_1(pptr);
846 source_address_length = EXTRACT_U_1(pptr);
847 pptr += 1;
848 li_remaining -= 1;
849 if (li_remaining < source_address_length) {
850 ND_PRINT("li < size of fixed part of CLNP header and addresses");
851 return (0);
852 }
853 ND_TCHECK_LEN(pptr, source_address_length);
854 source_address = pptr;
855 pptr += source_address_length;
856 li_remaining -= source_address_length;
857
858 if (ndo->ndo_vflag < 1) {
859 ND_PRINT("%s%s > %s, %s, length %u",
860 ndo->ndo_eflag ? "" : ", ",
861 isonsap_string(ndo, source_address, source_address_length),
862 isonsap_string(ndo, dest_address, dest_address_length),
863 tok2str(clnp_pdu_values,"unknown (%u)",clnp_pdu_type),
864 length);
865 return (1);
866 }
867 ND_PRINT("%slength %u", ndo->ndo_eflag ? "" : ", ", length);
868
869 ND_PRINT("\n\t%s PDU, hlen: %u, v: %u, lifetime: %u.%us, Segment PDU length: %u, checksum: 0x%04x",
870 tok2str(clnp_pdu_values, "unknown (%u)",clnp_pdu_type),
871 EXTRACT_U_1(clnp_header->length_indicator),
872 EXTRACT_U_1(clnp_header->version),
873 EXTRACT_U_1(clnp_header->lifetime)/2,
874 (EXTRACT_U_1(clnp_header->lifetime)%2)*5,
875 EXTRACT_BE_U_2(clnp_header->segment_length),
876 EXTRACT_BE_U_2(clnp_header->cksum));
877
878 osi_print_cksum(ndo, optr, EXTRACT_BE_U_2(clnp_header->cksum), 7,
879 EXTRACT_U_1(clnp_header->length_indicator));
880
881 ND_PRINT("\n\tFlags [%s]",
882 bittok2str(clnp_flag_values, "none", clnp_flags));
883
884 ND_PRINT("\n\tsource address (length %u): %s\n\tdest address (length %u): %s",
885 source_address_length,
886 isonsap_string(ndo, source_address, source_address_length),
887 dest_address_length,
888 isonsap_string(ndo, dest_address, dest_address_length));
889
890 if (clnp_flags & CLNP_SEGMENT_PART) {
891 if (li_remaining < sizeof(struct clnp_segment_header_t)) {
892 ND_PRINT("li < size of fixed part of CLNP header, addresses, and segment part");
893 return (0);
894 }
895 clnp_segment_header = (const struct clnp_segment_header_t *) pptr;
896 ND_TCHECK_SIZE(clnp_segment_header);
897 ND_PRINT("\n\tData Unit ID: 0x%04x, Segment Offset: %u, Total PDU Length: %u",
898 EXTRACT_BE_U_2(clnp_segment_header->data_unit_id),
899 EXTRACT_BE_U_2(clnp_segment_header->segment_offset),
900 EXTRACT_BE_U_2(clnp_segment_header->total_length));
901 pptr+=sizeof(struct clnp_segment_header_t);
902 li_remaining-=sizeof(struct clnp_segment_header_t);
903 }
904
905 /* now walk the options */
906 while (li_remaining != 0) {
907 u_int op, opli;
908 const uint8_t *tptr;
909
910 if (li_remaining < 2) {
911 ND_PRINT(", bad opts/li");
912 return (0);
913 }
914 ND_TCHECK_2(pptr);
915 op = EXTRACT_U_1(pptr);
916 opli = EXTRACT_U_1(pptr + 1);
917 pptr += 2;
918 li_remaining -= 2;
919 if (opli > li_remaining) {
920 ND_PRINT(", opt (%u) too long", op);
921 return (0);
922 }
923 ND_TCHECK_LEN(pptr, opli);
924 li_remaining -= opli;
925 tptr = pptr;
926 tlen = opli;
927
928 ND_PRINT("\n\t %s Option #%u, length %u, value: ",
929 tok2str(clnp_option_values,"Unknown",op),
930 op,
931 opli);
932
933 /*
934 * We've already checked that the entire option is present
935 * in the captured packet with the ND_TCHECK_LEN() call.
936 * Therefore, we don't need to do ND_TCHECK()/ND_TCHECK_LEN()
937 * checks.
938 * We do, however, need to check tlen, to make sure we
939 * don't run past the end of the option.
940 */
941 switch (op) {
942
943
944 case CLNP_OPTION_ROUTE_RECORDING: /* those two options share the format */
945 case CLNP_OPTION_SOURCE_ROUTING:
946 if (tlen < 2) {
947 ND_PRINT(", bad opt len");
948 return (0);
949 }
950 ND_PRINT("%s %s",
951 tok2str(clnp_option_sr_rr_values,"Unknown",EXTRACT_U_1(tptr)),
952 tok2str(clnp_option_sr_rr_string_values, "Unknown Option %u", op));
953 nsap_offset=EXTRACT_U_1(tptr + 1);
954 if (nsap_offset == 0) {
955 ND_PRINT(" Bad NSAP offset (0)");
956 break;
957 }
958 nsap_offset-=1; /* offset to nsap list */
959 if (nsap_offset > tlen) {
960 ND_PRINT(" Bad NSAP offset (past end of option)");
961 break;
962 }
963 tptr+=nsap_offset;
964 tlen-=nsap_offset;
965 while (tlen > 0) {
966 source_address_length=EXTRACT_U_1(tptr);
967 if (tlen < source_address_length+1) {
968 ND_PRINT("\n\t NSAP address goes past end of option");
969 break;
970 }
971 if (source_address_length > 0) {
972 source_address=(tptr+1);
973 ND_TCHECK_LEN(source_address,
974 source_address_length);
975 ND_PRINT("\n\t NSAP address (length %u): %s",
976 source_address_length,
977 isonsap_string(ndo, source_address, source_address_length));
978 }
979 tlen-=source_address_length+1;
980 }
981 break;
982
983 case CLNP_OPTION_PRIORITY:
984 if (tlen < 1) {
985 ND_PRINT(", bad opt len");
986 return (0);
987 }
988 ND_PRINT("0x%1x", EXTRACT_U_1(tptr)&0x0f);
989 break;
990
991 case CLNP_OPTION_QOS_MAINTENANCE:
992 if (tlen < 1) {
993 ND_PRINT(", bad opt len");
994 return (0);
995 }
996 ND_PRINT("\n\t Format Code: %s",
997 tok2str(clnp_option_scope_values, "Reserved", EXTRACT_U_1(tptr) & CLNP_OPTION_SCOPE_MASK));
998
999 if ((EXTRACT_U_1(tptr)&CLNP_OPTION_SCOPE_MASK) == CLNP_OPTION_SCOPE_GLOBAL)
1000 ND_PRINT("\n\t QoS Flags [%s]",
1001 bittok2str(clnp_option_qos_global_values,
1002 "none",
1003 EXTRACT_U_1(tptr)&CLNP_OPTION_OPTION_QOS_MASK));
1004 break;
1005
1006 case CLNP_OPTION_SECURITY:
1007 if (tlen < 2) {
1008 ND_PRINT(", bad opt len");
1009 return (0);
1010 }
1011 ND_PRINT("\n\t Format Code: %s, Security-Level %u",
1012 tok2str(clnp_option_scope_values,"Reserved",EXTRACT_U_1(tptr)&CLNP_OPTION_SCOPE_MASK),
1013 EXTRACT_U_1(tptr + 1));
1014 break;
1015
1016 case CLNP_OPTION_DISCARD_REASON:
1017 if (tlen < 1) {
1018 ND_PRINT(", bad opt len");
1019 return (0);
1020 }
1021 rfd_error = EXTRACT_U_1(tptr);
1022 rfd_error_major = (rfd_error&0xf0) >> 4;
1023 rfd_error_minor = rfd_error&0x0f;
1024 ND_PRINT("\n\t Class: %s Error (0x%01x), %s (0x%01x)",
1025 tok2str(clnp_option_rfd_class_values,"Unknown",rfd_error_major),
1026 rfd_error_major,
1027 tok2str(clnp_option_rfd_error_class[rfd_error_major],"Unknown",rfd_error_minor),
1028 rfd_error_minor);
1029 break;
1030
1031 case CLNP_OPTION_PADDING:
1032 ND_PRINT("padding data");
1033 break;
1034
1035 /*
1036 * FIXME those are the defined Options that lack a decoder
1037 * you are welcome to contribute code ;-)
1038 */
1039
1040 default:
1041 print_unknown_data(ndo, tptr, "\n\t ", opli);
1042 break;
1043 }
1044 if (ndo->ndo_vflag > 1)
1045 print_unknown_data(ndo, pptr, "\n\t ", opli);
1046 pptr += opli;
1047 }
1048
1049 switch (clnp_pdu_type) {
1050
1051 case CLNP_PDU_ER: /* fall through */
1052 case CLNP_PDU_ERP:
1053 ND_TCHECK_1(pptr);
1054 if (EXTRACT_U_1(pptr) == NLPID_CLNP) {
1055 ND_PRINT("\n\t-----original packet-----\n\t");
1056 /* FIXME recursion protection */
1057 clnp_print(ndo, pptr, length - li);
1058 break;
1059 }
1060
1061 /* The cases above break from the switch block if they see and print
1062 * a CLNP header in the Data part. For an Error Report PDU this is
1063 * described in Section 7.9.6 of ITU X.233 (1997 E), also known as
1064 * ISO/IEC 8473-1:1998(E). It is not clear why in this code the same
1065 * applies to an Echo Response PDU, as the standard does not specify
1066 * the contents -- could be a proprietary extension or a bug. In either
1067 * case, if the Data part does not contain a CLNP header, its structure
1068 * is considered unknown and the decoding falls through to print the
1069 * contents as-is.
1070 */
1071 ND_FALL_THROUGH;
1072
1073 case CLNP_PDU_DT:
1074 case CLNP_PDU_MD:
1075 case CLNP_PDU_ERQ:
1076
1077 default:
1078 /* dump the PDU specific data */
1079 if (length-(pptr-optr) > 0) {
1080 ND_PRINT("\n\t undecoded non-header data, length %u", length-li);
1081 print_unknown_data(ndo, pptr, "\n\t ", length - (int)(pptr - optr));
1082 }
1083 }
1084
1085 return (1);
1086
1087 trunc:
1088 nd_print_trunc(ndo);
1089 return (1);
1090
1091 }
1092
1093
1094 #define ESIS_PDU_REDIRECT 6
1095 #define ESIS_PDU_ESH 2
1096 #define ESIS_PDU_ISH 4
1097
1098 static const struct tok esis_pdu_values[] = {
1099 { ESIS_PDU_REDIRECT, "redirect"},
1100 { ESIS_PDU_ESH, "ESH"},
1101 { ESIS_PDU_ISH, "ISH"},
1102 { 0, NULL }
1103 };
1104
1105 struct esis_header_t {
1106 nd_uint8_t nlpid;
1107 nd_uint8_t length_indicator;
1108 nd_uint8_t version;
1109 nd_byte reserved;
1110 nd_uint8_t type;
1111 nd_uint16_t holdtime;
1112 nd_uint16_t cksum;
1113 };
1114
1115 static void
1116 esis_print(netdissect_options *ndo,
1117 const uint8_t *pptr, u_int length)
1118 {
1119 const uint8_t *optr;
1120 u_int li, version, esis_pdu_type, source_address_length, source_address_number;
1121 const struct esis_header_t *esis_header;
1122
1123 ndo->ndo_protocol = "esis";
1124 if (!ndo->ndo_eflag)
1125 ND_PRINT("ES-IS");
1126
1127 if (length <= 2) {
1128 ND_PRINT(ndo->ndo_qflag ? "bad pkt!" : "no header at all!");
1129 return;
1130 }
1131
1132 esis_header = (const struct esis_header_t *) pptr;
1133 ND_TCHECK_SIZE(esis_header);
1134 li = EXTRACT_U_1(esis_header->length_indicator);
1135 optr = pptr;
1136
1137 /*
1138 * Sanity checking of the header.
1139 */
1140
1141 if (EXTRACT_U_1(esis_header->nlpid) != NLPID_ESIS) {
1142 ND_PRINT(" nlpid 0x%02x packet not supported", EXTRACT_U_1(esis_header->nlpid));
1143 return;
1144 }
1145
1146 version = EXTRACT_U_1(esis_header->version);
1147 if (version != ESIS_VERSION) {
1148 ND_PRINT(" version %u packet not supported", version);
1149 return;
1150 }
1151
1152 if (li > length) {
1153 ND_PRINT(" length indicator(%u) > PDU size (%u)!", li, length);
1154 return;
1155 }
1156
1157 if (li < sizeof(struct esis_header_t) + 2) {
1158 ND_PRINT(" length indicator %u < min PDU size:", li);
1159 while (pptr < ndo->ndo_snapend) {
1160 ND_PRINT("%02X", EXTRACT_U_1(pptr));
1161 pptr++;
1162 }
1163 return;
1164 }
1165
1166 esis_pdu_type = EXTRACT_U_1(esis_header->type) & ESIS_PDU_TYPE_MASK;
1167
1168 if (ndo->ndo_vflag < 1) {
1169 ND_PRINT("%s%s, length %u",
1170 ndo->ndo_eflag ? "" : ", ",
1171 tok2str(esis_pdu_values,"unknown type (%u)",esis_pdu_type),
1172 length);
1173 return;
1174 } else
1175 ND_PRINT("%slength %u\n\t%s (%u)",
1176 ndo->ndo_eflag ? "" : ", ",
1177 length,
1178 tok2str(esis_pdu_values,"unknown type: %u", esis_pdu_type),
1179 esis_pdu_type);
1180
1181 ND_PRINT(", v: %u%s", version, version == ESIS_VERSION ? "" : "unsupported" );
1182 ND_PRINT(", checksum: 0x%04x", EXTRACT_BE_U_2(esis_header->cksum));
1183
1184 osi_print_cksum(ndo, pptr, EXTRACT_BE_U_2(esis_header->cksum), 7,
1185 li);
1186
1187 ND_PRINT(", holding time: %us, length indicator: %u",
1188 EXTRACT_BE_U_2(esis_header->holdtime), li);
1189
1190 if (ndo->ndo_vflag > 1)
1191 print_unknown_data(ndo, optr, "\n\t", sizeof(struct esis_header_t));
1192
1193 pptr += sizeof(struct esis_header_t);
1194 li -= sizeof(struct esis_header_t);
1195
1196 switch (esis_pdu_type) {
1197 case ESIS_PDU_REDIRECT: {
1198 const uint8_t *dst, *snpa, *neta;
1199 u_int dstl, snpal, netal;
1200
1201 ND_TCHECK_1(pptr);
1202 if (li < 1) {
1203 ND_PRINT(", bad redirect/li");
1204 return;
1205 }
1206 dstl = EXTRACT_U_1(pptr);
1207 pptr++;
1208 li--;
1209 ND_TCHECK_LEN(pptr, dstl);
1210 if (li < dstl) {
1211 ND_PRINT(", bad redirect/li");
1212 return;
1213 }
1214 dst = pptr;
1215 pptr += dstl;
1216 li -= dstl;
1217 ND_PRINT("\n\t %s", isonsap_string(ndo, dst, dstl));
1218
1219 ND_TCHECK_1(pptr);
1220 if (li < 1) {
1221 ND_PRINT(", bad redirect/li");
1222 return;
1223 }
1224 snpal = EXTRACT_U_1(pptr);
1225 pptr++;
1226 li--;
1227 ND_TCHECK_LEN(pptr, snpal);
1228 if (li < snpal) {
1229 ND_PRINT(", bad redirect/li");
1230 return;
1231 }
1232 snpa = pptr;
1233 pptr += snpal;
1234 li -= snpal;
1235 ND_TCHECK_1(pptr);
1236 if (li < 1) {
1237 ND_PRINT(", bad redirect/li");
1238 return;
1239 }
1240 netal = EXTRACT_U_1(pptr);
1241 pptr++;
1242 ND_TCHECK_LEN(pptr, netal);
1243 if (li < netal) {
1244 ND_PRINT(", bad redirect/li");
1245 return;
1246 }
1247 neta = pptr;
1248 pptr += netal;
1249 li -= netal;
1250
1251 if (snpal == 6)
1252 ND_PRINT("\n\t SNPA (length: %u): %s",
1253 snpal,
1254 etheraddr_string(ndo, snpa));
1255 else
1256 ND_PRINT("\n\t SNPA (length: %u): %s",
1257 snpal,
1258 linkaddr_string(ndo, snpa, LINKADDR_OTHER, snpal));
1259 if (netal != 0)
1260 ND_PRINT("\n\t NET (length: %u) %s",
1261 netal,
1262 isonsap_string(ndo, neta, netal));
1263 break;
1264 }
1265
1266 case ESIS_PDU_ESH:
1267 ND_TCHECK_1(pptr);
1268 if (li < 1) {
1269 ND_PRINT(", bad esh/li");
1270 return;
1271 }
1272 source_address_number = EXTRACT_U_1(pptr);
1273 pptr++;
1274 li--;
1275
1276 ND_PRINT("\n\t Number of Source Addresses: %u", source_address_number);
1277
1278 while (source_address_number > 0) {
1279 ND_TCHECK_1(pptr);
1280 if (li < 1) {
1281 ND_PRINT(", bad esh/li");
1282 return;
1283 }
1284 source_address_length = EXTRACT_U_1(pptr);
1285 pptr++;
1286 li--;
1287
1288 ND_TCHECK_LEN(pptr, source_address_length);
1289 if (li < source_address_length) {
1290 ND_PRINT(", bad esh/li");
1291 return;
1292 }
1293 ND_PRINT("\n\t NET (length: %u): %s",
1294 source_address_length,
1295 isonsap_string(ndo, pptr, source_address_length));
1296 pptr += source_address_length;
1297 li -= source_address_length;
1298 source_address_number--;
1299 }
1300
1301 break;
1302
1303 case ESIS_PDU_ISH: {
1304 ND_TCHECK_1(pptr);
1305 if (li < 1) {
1306 ND_PRINT(", bad ish/li");
1307 return;
1308 }
1309 source_address_length = EXTRACT_U_1(pptr);
1310 pptr++;
1311 li--;
1312 ND_TCHECK_LEN(pptr, source_address_length);
1313 if (li < source_address_length) {
1314 ND_PRINT(", bad ish/li");
1315 return;
1316 }
1317 ND_PRINT("\n\t NET (length: %u): %s", source_address_length, isonsap_string(ndo, pptr, source_address_length));
1318 pptr += source_address_length;
1319 li -= source_address_length;
1320 break;
1321 }
1322
1323 default:
1324 if (ndo->ndo_vflag <= 1) {
1325 if (pptr < ndo->ndo_snapend)
1326 print_unknown_data(ndo, pptr, "\n\t ", (int)(ndo->ndo_snapend - pptr));
1327 }
1328 return;
1329 }
1330
1331 /* now walk the options */
1332 while (li != 0) {
1333 u_int op, opli;
1334 const uint8_t *tptr;
1335
1336 if (li < 2) {
1337 ND_PRINT(", bad opts/li");
1338 return;
1339 }
1340 ND_TCHECK_2(pptr);
1341 op = EXTRACT_U_1(pptr);
1342 opli = EXTRACT_U_1(pptr + 1);
1343 pptr += 2;
1344 li -= 2;
1345 if (opli > li) {
1346 ND_PRINT(", opt (%u) too long", op);
1347 return;
1348 }
1349 li -= opli;
1350 tptr = pptr;
1351
1352 ND_PRINT("\n\t %s Option #%u, length %u, value: ",
1353 tok2str(esis_option_values,"Unknown",op),
1354 op,
1355 opli);
1356
1357 switch (op) {
1358
1359 case ESIS_OPTION_ES_CONF_TIME:
1360 if (opli == 2) {
1361 ND_TCHECK_2(pptr);
1362 ND_PRINT("%us", EXTRACT_BE_U_2(tptr));
1363 } else
1364 ND_PRINT("(bad length)");
1365 break;
1366
1367 case ESIS_OPTION_PROTOCOLS:
1368 while (opli>0) {
1369 ND_TCHECK_1(tptr);
1370 ND_PRINT("%s (0x%02x)",
1371 tok2str(nlpid_values,
1372 "unknown",
1373 EXTRACT_U_1(tptr)),
1374 EXTRACT_U_1(tptr));
1375 if (opli>1) /* further NPLIDs ? - put comma */
1376 ND_PRINT(", ");
1377 tptr++;
1378 opli--;
1379 }
1380 break;
1381
1382 /*
1383 * FIXME those are the defined Options that lack a decoder
1384 * you are welcome to contribute code ;-)
1385 */
1386
1387 case ESIS_OPTION_QOS_MAINTENANCE:
1388 case ESIS_OPTION_SECURITY:
1389 case ESIS_OPTION_PRIORITY:
1390 case ESIS_OPTION_ADDRESS_MASK:
1391 case ESIS_OPTION_SNPA_MASK:
1392
1393 default:
1394 print_unknown_data(ndo, tptr, "\n\t ", opli);
1395 break;
1396 }
1397 if (ndo->ndo_vflag > 1)
1398 print_unknown_data(ndo, pptr, "\n\t ", opli);
1399 pptr += opli;
1400 }
1401 return;
1402
1403 trunc:
1404 nd_print_trunc(ndo);
1405 }
1406
1407 static void
1408 isis_print_mcid(netdissect_options *ndo,
1409 const struct isis_spb_mcid *mcid)
1410 {
1411 int i;
1412
1413 ND_TCHECK_SIZE(mcid);
1414 ND_PRINT("ID: %u, Name: ", EXTRACT_U_1(mcid->format_id));
1415
1416 if (nd_printzp(ndo, mcid->name, 32, ndo->ndo_snapend))
1417 goto trunc;
1418
1419 ND_PRINT("\n\t Lvl: %u", EXTRACT_BE_U_2(mcid->revision_lvl));
1420
1421 ND_PRINT(", Digest: ");
1422
1423 for(i=0;i<16;i++)
1424 ND_PRINT("%.2x ", mcid->digest[i]);
1425 return;
1426
1427 trunc:
1428 nd_print_trunc(ndo);
1429 }
1430
1431 static int
1432 isis_print_mt_port_cap_subtlv(netdissect_options *ndo,
1433 const uint8_t *tptr, u_int len)
1434 {
1435 u_int stlv_type, stlv_len;
1436 const struct isis_subtlv_spb_mcid *subtlv_spb_mcid;
1437 int i;
1438
1439 while (len > 2)
1440 {
1441 ND_TCHECK_2(tptr);
1442 stlv_type = EXTRACT_U_1(tptr);
1443 stlv_len = EXTRACT_U_1(tptr + 1);
1444
1445 /* first lets see if we know the subTLVs name*/
1446 ND_PRINT("\n\t %s subTLV #%u, length: %u",
1447 tok2str(isis_mt_port_cap_subtlv_values, "unknown", stlv_type),
1448 stlv_type,
1449 stlv_len);
1450
1451 tptr = tptr + 2;
1452 /*len -= TLV_TYPE_LEN_OFFSET;*/
1453 len = len - 2;
1454
1455 /* Make sure the subTLV fits within the space left */
1456 if (len < stlv_len)
1457 goto trunc;
1458 /* Make sure the entire subTLV is in the captured data */
1459 ND_TCHECK_LEN(tptr, stlv_len);
1460
1461 switch (stlv_type)
1462 {
1463 case ISIS_SUBTLV_SPB_MCID:
1464 {
1465 if (stlv_len < ISIS_SUBTLV_SPB_MCID_MIN_LEN)
1466 goto trunc;
1467
1468 subtlv_spb_mcid = (const struct isis_subtlv_spb_mcid *)tptr;
1469
1470 ND_PRINT("\n\t MCID: ");
1471 isis_print_mcid(ndo, &(subtlv_spb_mcid->mcid));
1472
1473 /*tptr += SPB_MCID_MIN_LEN;
1474 len -= SPB_MCID_MIN_LEN; */
1475
1476 ND_PRINT("\n\t AUX-MCID: ");
1477 isis_print_mcid(ndo, &(subtlv_spb_mcid->aux_mcid));
1478
1479 /*tptr += SPB_MCID_MIN_LEN;
1480 len -= SPB_MCID_MIN_LEN; */
1481 tptr = tptr + ISIS_SUBTLV_SPB_MCID_MIN_LEN;
1482 len = len - ISIS_SUBTLV_SPB_MCID_MIN_LEN;
1483 stlv_len = stlv_len - ISIS_SUBTLV_SPB_MCID_MIN_LEN;
1484
1485 break;
1486 }
1487
1488 case ISIS_SUBTLV_SPB_DIGEST:
1489 {
1490 if (stlv_len < ISIS_SUBTLV_SPB_DIGEST_MIN_LEN)
1491 goto trunc;
1492
1493 ND_PRINT("\n\t RES: %u V: %u A: %u D: %u",
1494 (EXTRACT_U_1(tptr) >> 5),
1495 ((EXTRACT_U_1(tptr) >> 4) & 0x01),
1496 ((EXTRACT_U_1(tptr) >> 2) & 0x03),
1497 (EXTRACT_U_1(tptr) & 0x03));
1498
1499 tptr++;
1500
1501 ND_PRINT("\n\t Digest: ");
1502
1503 for(i=1;i<=8; i++)
1504 {
1505 ND_PRINT("%08x ", EXTRACT_BE_U_4(tptr));
1506 if (i%4 == 0 && i != 8)
1507 ND_PRINT("\n\t ");
1508 tptr = tptr + 4;
1509 }
1510
1511 len = len - ISIS_SUBTLV_SPB_DIGEST_MIN_LEN;
1512 stlv_len = stlv_len - ISIS_SUBTLV_SPB_DIGEST_MIN_LEN;
1513
1514 break;
1515 }
1516
1517 case ISIS_SUBTLV_SPB_BVID:
1518 {
1519 while (stlv_len >= ISIS_SUBTLV_SPB_BVID_MIN_LEN)
1520 {
1521 ND_PRINT("\n\t ECT: %08x",
1522 EXTRACT_BE_U_4(tptr));
1523
1524 tptr = tptr+4;
1525
1526 ND_PRINT(" BVID: %u, U:%01x M:%01x ",
1527 (EXTRACT_BE_U_2(tptr) >> 4) ,
1528 (EXTRACT_BE_U_2(tptr) >> 3) & 0x01,
1529 (EXTRACT_BE_U_2(tptr) >> 2) & 0x01);
1530
1531 tptr = tptr + 2;
1532 len = len - ISIS_SUBTLV_SPB_BVID_MIN_LEN;
1533 stlv_len = stlv_len - ISIS_SUBTLV_SPB_BVID_MIN_LEN;
1534 }
1535
1536 break;
1537 }
1538
1539 default:
1540 break;
1541 }
1542 tptr += stlv_len;
1543 len -= stlv_len;
1544 }
1545
1546 return 0;
1547
1548 trunc:
1549 nd_print_trunc(ndo);
1550 return(1);
1551 }
1552
1553 static int
1554 isis_print_mt_capability_subtlv(netdissect_options *ndo,
1555 const uint8_t *tptr, u_int len)
1556 {
1557 u_int stlv_type, stlv_len, tmp;
1558
1559 while (len > 2)
1560 {
1561 ND_TCHECK_2(tptr);
1562 stlv_type = EXTRACT_U_1(tptr);
1563 stlv_len = EXTRACT_U_1(tptr + 1);
1564 tptr = tptr + 2;
1565 len = len - 2;
1566
1567 /* first lets see if we know the subTLVs name*/
1568 ND_PRINT("\n\t %s subTLV #%u, length: %u",
1569 tok2str(isis_mt_capability_subtlv_values, "unknown", stlv_type),
1570 stlv_type,
1571 stlv_len);
1572
1573 /* Make sure the subTLV fits within the space left */
1574 if (len < stlv_len)
1575 goto trunc;
1576 /* Make sure the entire subTLV is in the captured data */
1577 ND_TCHECK_LEN(tptr, stlv_len);
1578
1579 switch (stlv_type)
1580 {
1581 case ISIS_SUBTLV_SPB_INSTANCE:
1582 if (stlv_len < ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN)
1583 goto trunc;
1584
1585 ND_PRINT("\n\t CIST Root-ID: %08x", EXTRACT_BE_U_4(tptr));
1586 tptr = tptr+4;
1587 ND_PRINT(" %08x", EXTRACT_BE_U_4(tptr));
1588 tptr = tptr+4;
1589 ND_PRINT(", Path Cost: %08x", EXTRACT_BE_U_4(tptr));
1590 tptr = tptr+4;
1591 ND_PRINT(", Prio: %u", EXTRACT_BE_U_2(tptr));
1592 tptr = tptr + 2;
1593 ND_PRINT("\n\t RES: %u",
1594 EXTRACT_BE_U_2(tptr) >> 5);
1595 ND_PRINT(", V: %u",
1596 (EXTRACT_BE_U_2(tptr) >> 4) & 0x0001);
1597 ND_PRINT(", SPSource-ID: %u",
1598 (EXTRACT_BE_U_4(tptr) & 0x000fffff));
1599 tptr = tptr+4;
1600 ND_PRINT(", No of Trees: %x", EXTRACT_U_1(tptr));
1601
1602 tmp = EXTRACT_U_1(tptr);
1603 tptr++;
1604
1605 len = len - ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN;
1606 stlv_len = stlv_len - ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN;
1607
1608 while (tmp)
1609 {
1610 if (stlv_len < ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN)
1611 goto trunc;
1612
1613 ND_PRINT("\n\t U:%u, M:%u, A:%u, RES:%u",
1614 EXTRACT_U_1(tptr) >> 7,
1615 (EXTRACT_U_1(tptr) >> 6) & 0x01,
1616 (EXTRACT_U_1(tptr) >> 5) & 0x01,
1617 (EXTRACT_U_1(tptr) & 0x1f));
1618
1619 tptr++;
1620
1621 ND_PRINT(", ECT: %08x", EXTRACT_BE_U_4(tptr));
1622
1623 tptr = tptr + 4;
1624
1625 ND_PRINT(", BVID: %u, SPVID: %u",
1626 (EXTRACT_BE_U_3(tptr) >> 12) & 0x000fff,
1627 EXTRACT_BE_U_3(tptr) & 0x000fff);
1628
1629 tptr = tptr + 3;
1630 len = len - ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN;
1631 stlv_len = stlv_len - ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN;
1632 tmp--;
1633 }
1634
1635 break;
1636
1637 case ISIS_SUBTLV_SPBM_SI:
1638 if (stlv_len < 8)
1639 goto trunc;
1640
1641 ND_PRINT("\n\t BMAC: %08x", EXTRACT_BE_U_4(tptr));
1642 tptr = tptr+4;
1643 ND_PRINT("%04x", EXTRACT_BE_U_2(tptr));
1644 tptr = tptr+2;
1645
1646 ND_PRINT(", RES: %u, VID: %u", EXTRACT_BE_U_2(tptr) >> 12,
1647 (EXTRACT_BE_U_2(tptr)) & 0x0fff);
1648
1649 tptr = tptr+2;
1650 len = len - 8;
1651 stlv_len = stlv_len - 8;
1652
1653 while (stlv_len >= 4) {
1654 ND_TCHECK_4(tptr);
1655 ND_PRINT("\n\t T: %u, R: %u, RES: %u, ISID: %u",
1656 (EXTRACT_BE_U_4(tptr) >> 31),
1657 (EXTRACT_BE_U_4(tptr) >> 30) & 0x01,
1658 (EXTRACT_BE_U_4(tptr) >> 24) & 0x03f,
1659 (EXTRACT_BE_U_4(tptr)) & 0x0ffffff);
1660
1661 tptr = tptr + 4;
1662 len = len - 4;
1663 stlv_len = stlv_len - 4;
1664 }
1665
1666 break;
1667
1668 default:
1669 break;
1670 }
1671 tptr += stlv_len;
1672 len -= stlv_len;
1673 }
1674 return 0;
1675
1676 trunc:
1677 nd_print_trunc(ndo);
1678 return(1);
1679 }
1680
1681 /* shared routine for printing system, node and lsp-ids */
1682 static char *
1683 isis_print_id(const uint8_t *cp, u_int id_len)
1684 {
1685 u_int i;
1686 static char id[sizeof("xxxx.xxxx.xxxx.yy-zz")];
1687 char *pos = id;
1688 u_int sysid_len;
1689
1690 sysid_len = SYSTEM_ID_LEN;
1691 if (sysid_len > id_len)
1692 sysid_len = id_len;
1693 for (i = 1; i <= sysid_len; i++) {
1694 nd_snprintf(pos, sizeof(id) - (pos - id), "%02x", EXTRACT_U_1(cp));
1695 cp++;
1696 pos += strlen(pos);
1697 if (i == 2 || i == 4)
1698 *pos++ = '.';
1699 }
1700 if (id_len >= NODE_ID_LEN) {
1701 nd_snprintf(pos, sizeof(id) - (pos - id), ".%02x", EXTRACT_U_1(cp));
1702 cp++;
1703 pos += strlen(pos);
1704 }
1705 if (id_len == LSP_ID_LEN)
1706 nd_snprintf(pos, sizeof(id) - (pos - id), "-%02x", EXTRACT_U_1(cp));
1707 return (id);
1708 }
1709
1710 /* print the 4-byte metric block which is common found in the old-style TLVs */
1711 static int
1712 isis_print_metric_block(netdissect_options *ndo,
1713 const struct isis_metric_block *isis_metric_block)
1714 {
1715 ND_PRINT(", Default Metric: %u, %s",
1716 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_default),
1717 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_default) ? "External" : "Internal");
1718 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_delay))
1719 ND_PRINT("\n\t\t Delay Metric: %u, %s",
1720 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_delay),
1721 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_delay) ? "External" : "Internal");
1722 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_expense))
1723 ND_PRINT("\n\t\t Expense Metric: %u, %s",
1724 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_expense),
1725 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_expense) ? "External" : "Internal");
1726 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_error))
1727 ND_PRINT("\n\t\t Error Metric: %u, %s",
1728 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_error),
1729 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_error) ? "External" : "Internal");
1730
1731 return(1); /* everything is ok */
1732 }
1733
1734 static int
1735 isis_print_tlv_ip_reach(netdissect_options *ndo,
1736 const uint8_t *cp, const char *ident, u_int length)
1737 {
1738 int prefix_len;
1739 const struct isis_tlv_ip_reach *tlv_ip_reach;
1740
1741 tlv_ip_reach = (const struct isis_tlv_ip_reach *)cp;
1742
1743 while (length > 0) {
1744 if ((size_t)length < sizeof(*tlv_ip_reach)) {
1745 ND_PRINT("short IPv4 Reachability (%u vs %lu)",
1746 length,
1747 (unsigned long)sizeof(*tlv_ip_reach));
1748 return (0);
1749 }
1750
1751 if (!ND_TTEST_SIZE(tlv_ip_reach))
1752 return (0);
1753
1754 prefix_len = mask2plen(EXTRACT_IPV4_TO_HOST_ORDER(tlv_ip_reach->mask));
1755
1756 if (prefix_len == -1)
1757 ND_PRINT("%sIPv4 prefix: %s mask %s",
1758 ident,
1759 ipaddr_string(ndo, (tlv_ip_reach->prefix)),
1760 ipaddr_string(ndo, (tlv_ip_reach->mask)));
1761 else
1762 ND_PRINT("%sIPv4 prefix: %15s/%u",
1763 ident,
1764 ipaddr_string(ndo, (tlv_ip_reach->prefix)),
1765 prefix_len);
1766
1767 ND_PRINT(", Distribution: %s, Metric: %u, %s",
1768 ISIS_LSP_TLV_METRIC_UPDOWN(tlv_ip_reach->isis_metric_block.metric_default) ? "down" : "up",
1769 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_default),
1770 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_default) ? "External" : "Internal");
1771
1772 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_delay))
1773 ND_PRINT("%s Delay Metric: %u, %s",
1774 ident,
1775 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_delay),
1776 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_delay) ? "External" : "Internal");
1777
1778 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_expense))
1779 ND_PRINT("%s Expense Metric: %u, %s",
1780 ident,
1781 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_expense),
1782 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_expense) ? "External" : "Internal");
1783
1784 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_error))
1785 ND_PRINT("%s Error Metric: %u, %s",
1786 ident,
1787 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_error),
1788 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_error) ? "External" : "Internal");
1789
1790 length -= sizeof(struct isis_tlv_ip_reach);
1791 tlv_ip_reach++;
1792 }
1793 return (1);
1794 }
1795
1796 /*
1797 * this is the common IP-REACH subTLV decoder it is called
1798 * from various EXTD-IP REACH TLVs (135,235,236,237)
1799 */
1800
1801 static int
1802 isis_print_ip_reach_subtlv(netdissect_options *ndo,
1803 const uint8_t *tptr, u_int subt, u_int subl,
1804 const char *ident)
1805 {
1806 /* first lets see if we know the subTLVs name*/
1807 ND_PRINT("%s%s subTLV #%u, length: %u",
1808 ident, tok2str(isis_ext_ip_reach_subtlv_values, "unknown", subt),
1809 subt, subl);
1810
1811 ND_TCHECK_LEN(tptr, subl);
1812
1813 switch(subt) {
1814 case ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR: /* fall through */
1815 case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32:
1816 while (subl >= 4) {
1817 ND_PRINT(", 0x%08x (=%u)",
1818 EXTRACT_BE_U_4(tptr),
1819 EXTRACT_BE_U_4(tptr));
1820 tptr+=4;
1821 subl-=4;
1822 }
1823 break;
1824 case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64:
1825 while (subl >= 8) {
1826 ND_PRINT(", 0x%08x%08x",
1827 EXTRACT_BE_U_4(tptr),
1828 EXTRACT_BE_U_4(tptr + 4));
1829 tptr+=8;
1830 subl-=8;
1831 }
1832 break;
1833 default:
1834 if (!print_unknown_data(ndo, tptr, "\n\t\t ", subl))
1835 return(0);
1836 break;
1837 }
1838 return(1);
1839
1840 trunc:
1841 nd_print_trunc(ndo);
1842 return(0);
1843 }
1844
1845 /*
1846 * this is the common IS-REACH decoder it is called
1847 * from various EXTD-IS REACH style TLVs (22,24,222)
1848 */
1849
1850 static int
1851 isis_print_ext_is_reach(netdissect_options *ndo,
1852 const uint8_t *tptr, const char *ident, u_int tlv_type,
1853 u_int tlv_remaining)
1854 {
1855 char ident_buffer[20];
1856 u_int subtlv_type,subtlv_len,subtlv_sum_len;
1857 int proc_bytes = 0; /* how many bytes did we process ? */
1858 u_int te_class,priority_level,gmpls_switch_cap;
1859 union { /* int to float conversion buffer for several subTLVs */
1860 float f;
1861 uint32_t i;
1862 } bw;
1863
1864 if (!ND_TTEST_LEN(tptr, NODE_ID_LEN))
1865 return(0);
1866 if (tlv_remaining < NODE_ID_LEN)
1867 return(0);
1868
1869 ND_PRINT("%sIS Neighbor: %s", ident, isis_print_id(tptr, NODE_ID_LEN));
1870 tptr+=NODE_ID_LEN;
1871 tlv_remaining-=NODE_ID_LEN;
1872
1873 if (tlv_type != ISIS_TLV_IS_ALIAS_ID) { /* the Alias TLV Metric field is implicit 0 */
1874 if (!ND_TTEST_3(tptr)) /* and is therefore skipped */
1875 return(0);
1876 if (tlv_remaining < 3)
1877 return(0);
1878 ND_PRINT(", Metric: %u", EXTRACT_BE_U_3(tptr));
1879 tptr+=3;
1880 tlv_remaining-=3;
1881 }
1882
1883 if (!ND_TTEST_1(tptr))
1884 return(0);
1885 if (tlv_remaining < 1)
1886 return(0);
1887 subtlv_sum_len=EXTRACT_U_1(tptr); /* read out subTLV length */
1888 tptr++;
1889 tlv_remaining--;
1890 proc_bytes=NODE_ID_LEN+3+1;
1891 ND_PRINT(", %ssub-TLVs present",subtlv_sum_len ? "" : "no ");
1892 if (subtlv_sum_len) {
1893 ND_PRINT(" (%u)", subtlv_sum_len);
1894 /* prepend the indent string */
1895 nd_snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident);
1896 ident = ident_buffer;
1897 while (subtlv_sum_len != 0) {
1898 if (!ND_TTEST_2(tptr))
1899 return(0);
1900 if (tlv_remaining < 2) {
1901 ND_PRINT("%sRemaining data in TLV shorter than a subTLV header",ident);
1902 proc_bytes += tlv_remaining;
1903 break;
1904 }
1905 if (subtlv_sum_len < 2) {
1906 ND_PRINT("%sRemaining data in subTLVs shorter than a subTLV header",ident);
1907 proc_bytes += subtlv_sum_len;
1908 break;
1909 }
1910 subtlv_type=EXTRACT_U_1(tptr);
1911 subtlv_len=EXTRACT_U_1(tptr + 1);
1912 tptr += 2;
1913 tlv_remaining -= 2;
1914 subtlv_sum_len -= 2;
1915 proc_bytes += 2;
1916 ND_PRINT("%s%s subTLV #%u, length: %u",
1917 ident, tok2str(isis_ext_is_reach_subtlv_values, "unknown", subtlv_type),
1918 subtlv_type, subtlv_len);
1919
1920 if (subtlv_sum_len < subtlv_len) {
1921 ND_PRINT(" (remaining data in subTLVs shorter than the current subTLV)");
1922 proc_bytes += subtlv_sum_len;
1923 break;
1924 }
1925
1926 if (tlv_remaining < subtlv_len) {
1927 ND_PRINT(" (> remaining tlv length)");
1928 proc_bytes += tlv_remaining;
1929 break;
1930 }
1931
1932 ND_TCHECK_LEN(tptr, subtlv_len);
1933
1934 switch(subtlv_type) {
1935 case ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP:
1936 case ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID:
1937 case ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID:
1938 if (subtlv_len >= 4) {
1939 ND_PRINT(", 0x%08x", EXTRACT_BE_U_4(tptr));
1940 if (subtlv_len == 8) /* rfc4205 */
1941 ND_PRINT(", 0x%08x", EXTRACT_BE_U_4(tptr + 4));
1942 }
1943 break;
1944 case ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR:
1945 case ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR:
1946 if (subtlv_len >= sizeof(nd_ipv4))
1947 ND_PRINT(", %s", ipaddr_string(ndo, tptr));
1948 break;
1949 case ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW :
1950 case ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW:
1951 if (subtlv_len >= 4) {
1952 bw.i = EXTRACT_BE_U_4(tptr);
1953 ND_PRINT(", %.3f Mbps", bw.f * 8 / 1000000);
1954 }
1955 break;
1956 case ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW :
1957 if (subtlv_len >= 32) {
1958 for (te_class = 0; te_class < 8; te_class++) {
1959 bw.i = EXTRACT_BE_U_4(tptr);
1960 ND_PRINT("%s TE-Class %u: %.3f Mbps",
1961 ident,
1962 te_class,
1963 bw.f * 8 / 1000000);
1964 tptr += 4;
1965 subtlv_len -= 4;
1966 subtlv_sum_len -= 4;
1967 proc_bytes += 4;
1968 }
1969 }
1970 break;
1971 case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS: /* fall through */
1972 case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD:
1973 if (subtlv_len == 0)
1974 break;
1975 ND_PRINT("%sBandwidth Constraints Model ID: %s (%u)",
1976 ident,
1977 tok2str(diffserv_te_bc_values, "unknown", EXTRACT_U_1(tptr)),
1978 EXTRACT_U_1(tptr));
1979 tptr++;
1980 subtlv_len--;
1981 subtlv_sum_len--;
1982 proc_bytes++;
1983 /* decode BCs until the subTLV ends */
1984 for (te_class = 0; subtlv_len != 0; te_class++) {
1985 if (subtlv_len < 4)
1986 break;
1987 bw.i = EXTRACT_BE_U_4(tptr);
1988 ND_PRINT("%s Bandwidth constraint CT%u: %.3f Mbps",
1989 ident,
1990 te_class,
1991 bw.f * 8 / 1000000);
1992 tptr += 4;
1993 subtlv_len -= 4;
1994 subtlv_sum_len -= 4;
1995 proc_bytes += 4;
1996 }
1997 break;
1998 case ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC:
1999 if (subtlv_len >= 3)
2000 ND_PRINT(", %u", EXTRACT_BE_U_3(tptr));
2001 break;
2002 case ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE:
2003 if (subtlv_len == 2) {
2004 ND_PRINT(", [ %s ] (0x%04x)",
2005 bittok2str(isis_subtlv_link_attribute_values,
2006 "Unknown",
2007 EXTRACT_BE_U_2(tptr)),
2008 EXTRACT_BE_U_2(tptr));
2009 }
2010 break;
2011 case ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE:
2012 if (subtlv_len >= 2) {
2013 ND_PRINT(", %s, Priority %u",
2014 bittok2str(gmpls_link_prot_values, "none", EXTRACT_U_1(tptr)),
2015 EXTRACT_U_1(tptr + 1));
2016 }
2017 break;
2018 case ISIS_SUBTLV_SPB_METRIC:
2019 if (subtlv_len >= 6) {
2020 ND_PRINT(", LM: %u", EXTRACT_BE_U_3(tptr));
2021 tptr += 3;
2022 subtlv_len -= 3;
2023 subtlv_sum_len -= 3;
2024 proc_bytes += 3;
2025 ND_PRINT(", P: %u", EXTRACT_U_1(tptr));
2026 tptr++;
2027 subtlv_len--;
2028 subtlv_sum_len--;
2029 proc_bytes++;
2030 ND_PRINT(", P-ID: %u", EXTRACT_BE_U_2(tptr));
2031 }
2032 break;
2033 case ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR:
2034 if (subtlv_len >= 36) {
2035 gmpls_switch_cap = EXTRACT_U_1(tptr);
2036 ND_PRINT("%s Interface Switching Capability:%s",
2037 ident,
2038 tok2str(gmpls_switch_cap_values, "Unknown", gmpls_switch_cap));
2039 ND_PRINT(", LSP Encoding: %s",
2040 tok2str(gmpls_encoding_values, "Unknown", EXTRACT_U_1((tptr + 1))));
2041 tptr += 4;
2042 subtlv_len -= 4;
2043 subtlv_sum_len -= 4;
2044 proc_bytes += 4;
2045 ND_PRINT("%s Max LSP Bandwidth:", ident);
2046 for (priority_level = 0; priority_level < 8; priority_level++) {
2047 bw.i = EXTRACT_BE_U_4(tptr);
2048 ND_PRINT("%s priority level %u: %.3f Mbps",
2049 ident,
2050 priority_level,
2051 bw.f * 8 / 1000000);
2052 tptr += 4;
2053 subtlv_len -= 4;
2054 subtlv_sum_len -= 4;
2055 proc_bytes += 4;
2056 }
2057 switch (gmpls_switch_cap) {
2058 case GMPLS_PSC1:
2059 case GMPLS_PSC2:
2060 case GMPLS_PSC3:
2061 case GMPLS_PSC4:
2062 if (subtlv_len < 6)
2063 break;
2064 bw.i = EXTRACT_BE_U_4(tptr);
2065 ND_PRINT("%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000);
2066 ND_PRINT("%s Interface MTU: %u", ident, EXTRACT_BE_U_2(tptr + 4));
2067 break;
2068 case GMPLS_TSC:
2069 if (subtlv_len < 8)
2070 break;
2071 bw.i = EXTRACT_BE_U_4(tptr);
2072 ND_PRINT("%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000);
2073 ND_PRINT("%s Indication %s", ident,
2074 tok2str(gmpls_switch_cap_tsc_indication_values, "Unknown (%u)", EXTRACT_U_1((tptr + 4))));
2075 break;
2076 default:
2077 /* there is some optional stuff left to decode but this is as of yet
2078 not specified so just lets hexdump what is left */
2079 if (subtlv_len != 0) {
2080 if (!print_unknown_data(ndo, tptr, "\n\t\t ", subtlv_len))
2081 return(0);
2082 }
2083 }
2084 }
2085 break;
2086 default:
2087 if (!print_unknown_data(ndo, tptr, "\n\t\t ", subtlv_len))
2088 return(0);
2089 break;
2090 }
2091
2092 tptr += subtlv_len;
2093 tlv_remaining -= subtlv_len;
2094 subtlv_sum_len -= subtlv_len;
2095 proc_bytes += subtlv_len;
2096 }
2097 }
2098 return(proc_bytes);
2099
2100 trunc:
2101 return(0);
2102 }
2103
2104 /*
2105 * this is the common Multi Topology ID decoder
2106 * it is called from various MT-TLVs (222,229,235,237)
2107 */
2108
2109 static u_int
2110 isis_print_mtid(netdissect_options *ndo,
2111 const uint8_t *tptr, const char *ident)
2112 {
2113 if (!ND_TTEST_2(tptr))
2114 return(0);
2115
2116 ND_PRINT("%s%s",
2117 ident,
2118 tok2str(isis_mt_values,
2119 "Reserved for IETF Consensus",
2120 ISIS_MASK_MTID(EXTRACT_BE_U_2(tptr))));
2121
2122 ND_PRINT(" Topology (0x%03x), Flags: [%s]",
2123 ISIS_MASK_MTID(EXTRACT_BE_U_2(tptr)),
2124 bittok2str(isis_mt_flag_values, "none",ISIS_MASK_MTFLAGS(EXTRACT_BE_U_2(tptr))));
2125
2126 return(2);
2127 }
2128
2129 /*
2130 * this is the common extended IP reach decoder
2131 * it is called from TLVs (135,235,236,237)
2132 * we process the TLV and optional subTLVs and return
2133 * the amount of processed bytes
2134 */
2135
2136 static u_int
2137 isis_print_extd_ip_reach(netdissect_options *ndo,
2138 const uint8_t *tptr, const char *ident, uint16_t afi)
2139 {
2140 char ident_buffer[20];
2141 uint8_t prefix[sizeof(nd_ipv6)]; /* shared copy buffer for IPv4 and IPv6 prefixes */
2142 u_int metric, status_byte, bit_length, byte_length, sublen, processed, subtlvtype, subtlvlen;
2143
2144 if (!ND_TTEST_4(tptr))
2145 return (0);
2146 metric = EXTRACT_BE_U_4(tptr);
2147 processed=4;
2148 tptr+=4;
2149
2150 if (afi == AF_INET) {
2151 if (!ND_TTEST_1(tptr)) /* fetch status byte */
2152 return (0);
2153 status_byte=EXTRACT_U_1(tptr);
2154 tptr++;
2155 bit_length = status_byte&0x3f;
2156 if (bit_length > 32) {
2157 ND_PRINT("%sIPv4 prefix: bad bit length %u",
2158 ident,
2159 bit_length);
2160 return (0);
2161 }
2162 processed++;
2163 } else if (afi == AF_INET6) {
2164 if (!ND_TTEST_2(tptr)) /* fetch status & prefix_len byte */
2165 return (0);
2166 status_byte=EXTRACT_U_1(tptr);
2167 bit_length=EXTRACT_U_1(tptr + 1);
2168 if (bit_length > 128) {
2169 ND_PRINT("%sIPv6 prefix: bad bit length %u",
2170 ident,
2171 bit_length);
2172 return (0);
2173 }
2174 tptr+=2;
2175 processed+=2;
2176 } else
2177 return (0); /* somebody is fooling us */
2178
2179 byte_length = (bit_length + 7) / 8; /* prefix has variable length encoding */
2180
2181 if (!ND_TTEST_LEN(tptr, byte_length))
2182 return (0);
2183 memset(prefix, 0, sizeof(prefix)); /* clear the copy buffer */
2184 memcpy(prefix,tptr,byte_length); /* copy as much as is stored in the TLV */
2185 tptr+=byte_length;
2186 processed+=byte_length;
2187
2188 if (afi == AF_INET)
2189 ND_PRINT("%sIPv4 prefix: %15s/%u",
2190 ident,
2191 ipaddr_string(ndo, prefix),
2192 bit_length);
2193 else if (afi == AF_INET6)
2194 ND_PRINT("%sIPv6 prefix: %s/%u",
2195 ident,
2196 ip6addr_string(ndo, prefix),
2197 bit_length);
2198
2199 ND_PRINT(", Distribution: %s, Metric: %u",
2200 ISIS_MASK_TLV_EXTD_IP_UPDOWN(status_byte) ? "down" : "up",
2201 metric);
2202
2203 if (afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte))
2204 ND_PRINT(", sub-TLVs present");
2205 else if (afi == AF_INET6)
2206 ND_PRINT(", %s%s",
2207 ISIS_MASK_TLV_EXTD_IP6_IE(status_byte) ? "External" : "Internal",
2208 ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte) ? ", sub-TLVs present" : "");
2209
2210 if ((afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte))
2211 || (afi == AF_INET6 && ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte))
2212 ) {
2213 /* assume that one prefix can hold more
2214 than one subTLV - therefore the first byte must reflect
2215 the aggregate bytecount of the subTLVs for this prefix
2216 */
2217 if (!ND_TTEST_1(tptr))
2218 return (0);
2219 sublen=EXTRACT_U_1(tptr);
2220 tptr++;
2221 processed+=sublen+1;
2222 ND_PRINT(" (%u)", sublen); /* print out subTLV length */
2223
2224 while (sublen>0) {
2225 if (!ND_TTEST_2(tptr))
2226 return (0);
2227 subtlvtype=EXTRACT_U_1(tptr);
2228 subtlvlen=EXTRACT_U_1(tptr + 1);
2229 tptr+=2;
2230 /* prepend the indent string */
2231 nd_snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident);
2232 if (!isis_print_ip_reach_subtlv(ndo, tptr, subtlvtype, subtlvlen, ident_buffer))
2233 return(0);
2234 tptr+=subtlvlen;
2235 sublen-=(subtlvlen+2);
2236 }
2237 }
2238 return (processed);
2239 }
2240
2241 /*
2242 * Clear checksum and lifetime prior to signature verification.
2243 */
2244 static void
2245 isis_clear_checksum_lifetime(void *header)
2246 {
2247 struct isis_lsp_header *header_lsp = (struct isis_lsp_header *) header;
2248
2249 header_lsp->checksum[0] = 0;
2250 header_lsp->checksum[1] = 0;
2251 header_lsp->remaining_lifetime[0] = 0;
2252 header_lsp->remaining_lifetime[1] = 0;
2253 }
2254
2255 /*
2256 * isis_print
2257 * Decode IS-IS packets. Return 0 on error.
2258 */
2259
2260 static int
2261 isis_print(netdissect_options *ndo,
2262 const uint8_t *p, u_int length)
2263 {
2264 const struct isis_common_header *isis_header;
2265
2266 const struct isis_iih_lan_header *header_iih_lan;
2267 const struct isis_iih_ptp_header *header_iih_ptp;
2268 const struct isis_lsp_header *header_lsp;
2269 const struct isis_csnp_header *header_csnp;
2270 const struct isis_psnp_header *header_psnp;
2271
2272 const struct isis_tlv_lsp *tlv_lsp;
2273 const struct isis_tlv_ptp_adj *tlv_ptp_adj;
2274 const struct isis_tlv_is_reach *tlv_is_reach;
2275 const struct isis_tlv_es_reach *tlv_es_reach;
2276
2277 uint8_t version, pdu_version, fixed_len;
2278 uint8_t pdu_type, pdu_max_area, max_area, pdu_id_length, id_length, tlv_type, tlv_len, tmp, alen, lan_alen, prefix_len;
2279 u_int ext_is_len, ext_ip_len, mt_len;
2280 uint8_t isis_subtlv_idrp;
2281 const uint8_t *optr, *pptr, *tptr;
2282 u_int packet_len;
2283 u_short pdu_len, key_id;
2284 u_int i,vendor_id;
2285 int sigcheck;
2286
2287 ndo->ndo_protocol = "isis";
2288 packet_len=length;
2289 optr = p; /* initialize the _o_riginal pointer to the packet start -
2290 need it for parsing the checksum TLV and authentication
2291 TLV verification */
2292 isis_header = (const struct isis_common_header *)p;
2293 ND_TCHECK_SIZE(isis_header);
2294 if (length < ISIS_COMMON_HEADER_SIZE)
2295 goto trunc;
2296 pptr = p+(ISIS_COMMON_HEADER_SIZE);
2297 header_iih_lan = (const struct isis_iih_lan_header *)pptr;
2298 header_iih_ptp = (const struct isis_iih_ptp_header *)pptr;
2299 header_lsp = (const struct isis_lsp_header *)pptr;
2300 header_csnp = (const struct isis_csnp_header *)pptr;
2301 header_psnp = (const struct isis_psnp_header *)pptr;
2302
2303 if (!ndo->ndo_eflag)
2304 ND_PRINT("IS-IS");
2305
2306 /*
2307 * Sanity checking of the header.
2308 */
2309
2310 version = EXTRACT_U_1(isis_header->version);
2311 if (version != ISIS_VERSION) {
2312 ND_PRINT("version %u packet not supported", version);
2313 return (0);
2314 }
2315
2316 pdu_id_length = EXTRACT_U_1(isis_header->id_length);
2317 if ((pdu_id_length != SYSTEM_ID_LEN) && (pdu_id_length != 0)) {
2318 ND_PRINT("system ID length of %u is not supported",
2319 pdu_id_length);
2320 return (0);
2321 }
2322
2323 pdu_version = EXTRACT_U_1(isis_header->pdu_version);
2324 if (pdu_version != ISIS_VERSION) {
2325 ND_PRINT("version %u packet not supported", pdu_version);
2326 return (0);
2327 }
2328
2329 fixed_len = EXTRACT_U_1(isis_header->fixed_len);
2330 if (length < fixed_len) {
2331 ND_PRINT("fixed header length %u > packet length %u", fixed_len, length);
2332 return (0);
2333 }
2334
2335 if (fixed_len < ISIS_COMMON_HEADER_SIZE) {
2336 ND_PRINT("fixed header length %u < minimum header size %u", fixed_len, (u_int)ISIS_COMMON_HEADER_SIZE);
2337 return (0);
2338 }
2339
2340 pdu_max_area = EXTRACT_U_1(isis_header->max_area);
2341 switch(pdu_max_area) {
2342 case 0:
2343 max_area = 3; /* silly shit */
2344 break;
2345 case 255:
2346 ND_PRINT("bad packet -- 255 areas");
2347 return (0);
2348 default:
2349 max_area = pdu_max_area;
2350 break;
2351 }
2352
2353 switch(pdu_id_length) {
2354 case 0:
2355 id_length = 6; /* silly shit again */
2356 break;
2357 case 1: /* 1-8 are valid sys-ID lengths */
2358 case 2:
2359 case 3:
2360 case 4:
2361 case 5:
2362 case 6:
2363 case 7:
2364 case 8:
2365 id_length = pdu_id_length;
2366 break;
2367 case 255:
2368 id_length = 0; /* entirely useless */
2369 break;
2370 default:
2371 id_length = pdu_id_length;
2372 break;
2373 }
2374
2375 /* toss any non 6-byte sys-ID len PDUs */
2376 if (id_length != 6 ) {
2377 ND_PRINT("bad packet -- illegal sys-ID length (%u)", id_length);
2378 return (0);
2379 }
2380
2381 pdu_type = EXTRACT_U_1(isis_header->pdu_type);
2382
2383 /* in non-verbose mode print the basic PDU Type plus PDU specific brief information*/
2384 if (ndo->ndo_vflag == 0) {
2385 ND_PRINT("%s%s",
2386 ndo->ndo_eflag ? "" : ", ",
2387 tok2str(isis_pdu_values, "unknown PDU-Type %u", pdu_type));
2388 } else {
2389 /* ok they seem to want to know everything - lets fully decode it */
2390 ND_PRINT("%slength %u", ndo->ndo_eflag ? "" : ", ", length);
2391
2392 ND_PRINT("\n\t%s, hlen: %u, v: %u, pdu-v: %u, sys-id-len: %u (%u), max-area: %u (%u)",
2393 tok2str(isis_pdu_values,
2394 "unknown, type %u",
2395 pdu_type),
2396 fixed_len,
2397 version,
2398 pdu_version,
2399 id_length,
2400 pdu_id_length,
2401 max_area,
2402 pdu_max_area);
2403
2404 if (ndo->ndo_vflag > 1) {
2405 if (!print_unknown_data(ndo, optr, "\n\t", 8)) /* provide the _o_riginal pointer */
2406 return (0); /* for optionally debugging the common header */
2407 }
2408 }
2409
2410 switch (pdu_type) {
2411
2412 case ISIS_PDU_L1_LAN_IIH:
2413 case ISIS_PDU_L2_LAN_IIH:
2414 if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) {
2415 ND_PRINT(", bogus fixed header length %u should be %lu",
2416 fixed_len, (unsigned long)(ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE));
2417 return (0);
2418 }
2419 ND_TCHECK_SIZE(header_iih_lan);
2420 if (length < ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)
2421 goto trunc;
2422 if (ndo->ndo_vflag == 0) {
2423 ND_PRINT(", src-id %s",
2424 isis_print_id(header_iih_lan->source_id, SYSTEM_ID_LEN));
2425 ND_PRINT(", lan-id %s, prio %u",
2426 isis_print_id(header_iih_lan->lan_id,NODE_ID_LEN),
2427 EXTRACT_U_1(header_iih_lan->priority));
2428 ND_PRINT(", length %u", length);
2429 return (1);
2430 }
2431 pdu_len=EXTRACT_BE_U_2(header_iih_lan->pdu_len);
2432 if (packet_len>pdu_len) {
2433 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2434 length=pdu_len;
2435 }
2436
2437 ND_PRINT("\n\t source-id: %s, holding time: %us, Flags: [%s]",
2438 isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN),
2439 EXTRACT_BE_U_2(header_iih_lan->holding_time),
2440 tok2str(isis_iih_circuit_type_values,
2441 "unknown circuit type 0x%02x",
2442 EXTRACT_U_1(header_iih_lan->circuit_type)));
2443
2444 ND_PRINT("\n\t lan-id: %s, Priority: %u, PDU length: %u",
2445 isis_print_id(header_iih_lan->lan_id, NODE_ID_LEN),
2446 EXTRACT_U_1(header_iih_lan->priority) & ISIS_LAN_PRIORITY_MASK,
2447 pdu_len);
2448
2449 if (ndo->ndo_vflag > 1) {
2450 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_IIH_LAN_HEADER_SIZE))
2451 return (0);
2452 }
2453
2454 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
2455 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
2456 break;
2457
2458 case ISIS_PDU_PTP_IIH:
2459 if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) {
2460 ND_PRINT(", bogus fixed header length %u should be %lu",
2461 fixed_len, (unsigned long)(ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE));
2462 return (0);
2463 }
2464 ND_TCHECK_SIZE(header_iih_ptp);
2465 if (length < ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)
2466 goto trunc;
2467 if (ndo->ndo_vflag == 0) {
2468 ND_PRINT(", src-id %s", isis_print_id(header_iih_ptp->source_id, SYSTEM_ID_LEN));
2469 ND_PRINT(", length %u", length);
2470 return (1);
2471 }
2472 pdu_len=EXTRACT_BE_U_2(header_iih_ptp->pdu_len);
2473 if (packet_len>pdu_len) {
2474 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2475 length=pdu_len;
2476 }
2477
2478 ND_PRINT("\n\t source-id: %s, holding time: %us, Flags: [%s]",
2479 isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN),
2480 EXTRACT_BE_U_2(header_iih_ptp->holding_time),
2481 tok2str(isis_iih_circuit_type_values,
2482 "unknown circuit type 0x%02x",
2483 EXTRACT_U_1(header_iih_ptp->circuit_type)));
2484
2485 ND_PRINT("\n\t circuit-id: 0x%02x, PDU length: %u",
2486 EXTRACT_U_1(header_iih_ptp->circuit_id),
2487 pdu_len);
2488
2489 if (ndo->ndo_vflag > 1) {
2490 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_IIH_PTP_HEADER_SIZE))
2491 return (0);
2492 }
2493
2494 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
2495 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
2496 break;
2497
2498 case ISIS_PDU_L1_LSP:
2499 case ISIS_PDU_L2_LSP:
2500 if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) {
2501 ND_PRINT(", bogus fixed header length %u should be %lu",
2502 fixed_len, (unsigned long)ISIS_LSP_HEADER_SIZE);
2503 return (0);
2504 }
2505 ND_TCHECK_SIZE(header_lsp);
2506 if (length < ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)
2507 goto trunc;
2508 if (ndo->ndo_vflag == 0) {
2509 ND_PRINT(", lsp-id %s, seq 0x%08x, lifetime %5us",
2510 isis_print_id(header_lsp->lsp_id, LSP_ID_LEN),
2511 EXTRACT_BE_U_4(header_lsp->sequence_number),
2512 EXTRACT_BE_U_2(header_lsp->remaining_lifetime));
2513 ND_PRINT(", length %u", length);
2514 return (1);
2515 }
2516 pdu_len=EXTRACT_BE_U_2(header_lsp->pdu_len);
2517 if (packet_len>pdu_len) {
2518 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2519 length=pdu_len;
2520 }
2521
2522 ND_PRINT("\n\t lsp-id: %s, seq: 0x%08x, lifetime: %5us\n\t chksum: 0x%04x",
2523 isis_print_id(header_lsp->lsp_id, LSP_ID_LEN),
2524 EXTRACT_BE_U_4(header_lsp->sequence_number),
2525 EXTRACT_BE_U_2(header_lsp->remaining_lifetime),
2526 EXTRACT_BE_U_2(header_lsp->checksum));
2527
2528 osi_print_cksum(ndo, (const uint8_t *)header_lsp->lsp_id,
2529 EXTRACT_BE_U_2(header_lsp->checksum),
2530 12, length-12);
2531
2532 ND_PRINT(", PDU length: %u, Flags: [ %s",
2533 pdu_len,
2534 ISIS_MASK_LSP_OL_BIT(header_lsp->typeblock) ? "Overload bit set, " : "");
2535
2536 if (ISIS_MASK_LSP_ATT_BITS(header_lsp->typeblock)) {
2537 ND_PRINT("%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : "");
2538 ND_PRINT("%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : "");
2539 ND_PRINT("%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : "");
2540 ND_PRINT("%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : "");
2541 ND_PRINT("ATT bit set, ");
2542 }
2543 ND_PRINT("%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : "");
2544 ND_PRINT("%s ]", tok2str(isis_lsp_istype_values, "Unknown(0x%x)",
2545 ISIS_MASK_LSP_ISTYPE_BITS(header_lsp->typeblock)));
2546
2547 if (ndo->ndo_vflag > 1) {
2548 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_LSP_HEADER_SIZE))
2549 return (0);
2550 }
2551
2552 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
2553 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
2554 break;
2555
2556 case ISIS_PDU_L1_CSNP:
2557 case ISIS_PDU_L2_CSNP:
2558 if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) {
2559 ND_PRINT(", bogus fixed header length %u should be %lu",
2560 fixed_len, (unsigned long)(ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE));
2561 return (0);
2562 }
2563 ND_TCHECK_SIZE(header_csnp);
2564 if (length < ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)
2565 goto trunc;
2566 if (ndo->ndo_vflag == 0) {
2567 ND_PRINT(", src-id %s", isis_print_id(header_csnp->source_id, NODE_ID_LEN));
2568 ND_PRINT(", length %u", length);
2569 return (1);
2570 }
2571 pdu_len=EXTRACT_BE_U_2(header_csnp->pdu_len);
2572 if (packet_len>pdu_len) {
2573 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2574 length=pdu_len;
2575 }
2576
2577 ND_PRINT("\n\t source-id: %s, PDU length: %u",
2578 isis_print_id(header_csnp->source_id, NODE_ID_LEN),
2579 pdu_len);
2580 ND_PRINT("\n\t start lsp-id: %s",
2581 isis_print_id(header_csnp->start_lsp_id, LSP_ID_LEN));
2582 ND_PRINT("\n\t end lsp-id: %s",
2583 isis_print_id(header_csnp->end_lsp_id, LSP_ID_LEN));
2584
2585 if (ndo->ndo_vflag > 1) {
2586 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_CSNP_HEADER_SIZE))
2587 return (0);
2588 }
2589
2590 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
2591 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
2592 break;
2593
2594 case ISIS_PDU_L1_PSNP:
2595 case ISIS_PDU_L2_PSNP:
2596 if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) {
2597 ND_PRINT("- bogus fixed header length %u should be %lu",
2598 fixed_len, (unsigned long)(ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE));
2599 return (0);
2600 }
2601 ND_TCHECK_SIZE(header_psnp);
2602 if (length < ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)
2603 goto trunc;
2604 if (ndo->ndo_vflag == 0) {
2605 ND_PRINT(", src-id %s", isis_print_id(header_psnp->source_id, NODE_ID_LEN));
2606 ND_PRINT(", length %u", length);
2607 return (1);
2608 }
2609 pdu_len=EXTRACT_BE_U_2(header_psnp->pdu_len);
2610 if (packet_len>pdu_len) {
2611 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2612 length=pdu_len;
2613 }
2614
2615 ND_PRINT("\n\t source-id: %s, PDU length: %u",
2616 isis_print_id(header_psnp->source_id, NODE_ID_LEN),
2617 pdu_len);
2618
2619 if (ndo->ndo_vflag > 1) {
2620 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_PSNP_HEADER_SIZE))
2621 return (0);
2622 }
2623
2624 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
2625 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
2626 break;
2627
2628 default:
2629 if (ndo->ndo_vflag == 0) {
2630 ND_PRINT(", length %u", length);
2631 return (1);
2632 }
2633 (void)print_unknown_data(ndo, pptr, "\n\t ", length);
2634 return (0);
2635 }
2636
2637 /*
2638 * Now print the TLV's.
2639 */
2640
2641 while (packet_len > 0) {
2642 ND_TCHECK_2(pptr);
2643 if (packet_len < 2)
2644 goto trunc;
2645 tlv_type = EXTRACT_U_1(pptr);
2646 tlv_len = EXTRACT_U_1(pptr + 1);
2647 pptr += 2;
2648 packet_len -= 2;
2649 tmp =tlv_len; /* copy temporary len & pointer to packet data */
2650 tptr = pptr;
2651
2652 /* first lets see if we know the TLVs name*/
2653 ND_PRINT("\n\t %s TLV #%u, length: %u",
2654 tok2str(isis_tlv_values,
2655 "unknown",
2656 tlv_type),
2657 tlv_type,
2658 tlv_len);
2659
2660 if (tlv_len == 0) /* something is invalid */
2661 continue;
2662
2663 if (packet_len < tlv_len)
2664 goto trunc;
2665
2666 /* now check if we have a decoder otherwise do a hexdump at the end*/
2667 switch (tlv_type) {
2668 case ISIS_TLV_AREA_ADDR:
2669 ND_TCHECK_1(tptr);
2670 alen = EXTRACT_U_1(tptr);
2671 tptr++;
2672 while (tmp && alen < tmp) {
2673 ND_TCHECK_LEN(tptr, alen);
2674 ND_PRINT("\n\t Area address (length: %u): %s",
2675 alen,
2676 isonsap_string(ndo, tptr, alen));
2677 tptr += alen;
2678 tmp -= alen + 1;
2679 if (tmp==0) /* if this is the last area address do not attempt a boundary check */
2680 break;
2681 ND_TCHECK_1(tptr);
2682 alen = EXTRACT_U_1(tptr);
2683 tptr++;
2684 }
2685 break;
2686 case ISIS_TLV_ISNEIGH:
2687 while (tmp >= MAC_ADDR_LEN) {
2688 ND_TCHECK_LEN(tptr, MAC_ADDR_LEN);
2689 ND_PRINT("\n\t SNPA: %s", isis_print_id(tptr, MAC_ADDR_LEN));
2690 tmp -= MAC_ADDR_LEN;
2691 tptr += MAC_ADDR_LEN;
2692 }
2693 break;
2694
2695 case ISIS_TLV_ISNEIGH_VARLEN:
2696 if (!ND_TTEST_1(tptr) || tmp < 3) /* min. TLV length */
2697 goto trunc;
2698 lan_alen = EXTRACT_U_1(tptr); /* LAN address length */
2699 tptr++;
2700 if (lan_alen == 0) {
2701 ND_PRINT("\n\t LAN address length 0 bytes");
2702 nd_print_invalid(ndo);
2703 break;
2704 }
2705 tmp --;
2706 ND_PRINT("\n\t LAN address length %u bytes ", lan_alen);
2707 while (tmp >= lan_alen) {
2708 ND_TCHECK_LEN(tptr, lan_alen);
2709 ND_PRINT("\n\t\tIS Neighbor: %s", isis_print_id(tptr, lan_alen));
2710 tmp -= lan_alen;
2711 tptr +=lan_alen;
2712 }
2713 break;
2714
2715 case ISIS_TLV_PADDING:
2716 break;
2717
2718 case ISIS_TLV_MT_IS_REACH:
2719 mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
2720 if (mt_len == 0) /* did something go wrong ? */
2721 goto trunc;
2722 tptr+=mt_len;
2723 tmp-=mt_len;
2724 while (tmp >= 2+NODE_ID_LEN+3+1) {
2725 ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type, tmp);
2726 if (ext_is_len == 0) /* did something go wrong ? */
2727 goto trunc;
2728
2729 tmp-=ext_is_len;
2730 tptr+=ext_is_len;
2731 }
2732 break;
2733
2734 case ISIS_TLV_IS_ALIAS_ID:
2735 while (tmp >= NODE_ID_LEN+1) { /* is it worth attempting a decode ? */
2736 ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type, tmp);
2737 if (ext_is_len == 0) /* did something go wrong ? */
2738 goto trunc;
2739 tmp-=ext_is_len;
2740 tptr+=ext_is_len;
2741 }
2742 break;
2743
2744 case ISIS_TLV_EXT_IS_REACH:
2745 while (tmp >= NODE_ID_LEN+3+1) { /* is it worth attempting a decode ? */
2746 ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type, tmp);
2747 if (ext_is_len == 0) /* did something go wrong ? */
2748 goto trunc;
2749 tmp-=ext_is_len;
2750 tptr+=ext_is_len;
2751 }
2752 break;
2753 case ISIS_TLV_IS_REACH:
2754 ND_TCHECK_1(tptr); /* check if there is one byte left to read out the virtual flag */
2755 ND_PRINT("\n\t %s",
2756 tok2str(isis_is_reach_virtual_values,
2757 "bogus virtual flag 0x%02x",
2758 EXTRACT_U_1(tptr)));
2759 tptr++;
2760 tlv_is_reach = (const struct isis_tlv_is_reach *)tptr;
2761 while (tmp >= sizeof(struct isis_tlv_is_reach)) {
2762 ND_TCHECK_SIZE(tlv_is_reach);
2763 ND_PRINT("\n\t IS Neighbor: %s",
2764 isis_print_id(tlv_is_reach->neighbor_nodeid, NODE_ID_LEN));
2765 isis_print_metric_block(ndo, &tlv_is_reach->isis_metric_block);
2766 tmp -= sizeof(struct isis_tlv_is_reach);
2767 tlv_is_reach++;
2768 }
2769 break;
2770
2771 case ISIS_TLV_ESNEIGH:
2772 tlv_es_reach = (const struct isis_tlv_es_reach *)tptr;
2773 while (tmp >= sizeof(struct isis_tlv_es_reach)) {
2774 ND_TCHECK_SIZE(tlv_es_reach);
2775 ND_PRINT("\n\t ES Neighbor: %s",
2776 isis_print_id(tlv_es_reach->neighbor_sysid, SYSTEM_ID_LEN));
2777 isis_print_metric_block(ndo, &tlv_es_reach->isis_metric_block);
2778 tmp -= sizeof(struct isis_tlv_es_reach);
2779 tlv_es_reach++;
2780 }
2781 break;
2782
2783 /* those two TLVs share the same format */
2784 case ISIS_TLV_INT_IP_REACH:
2785 case ISIS_TLV_EXT_IP_REACH:
2786 if (!isis_print_tlv_ip_reach(ndo, pptr, "\n\t ", tlv_len))
2787 return (1);
2788 break;
2789
2790 case ISIS_TLV_EXTD_IP_REACH:
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 trunc;
2795 tptr+=ext_ip_len;
2796 tmp-=ext_ip_len;
2797 }
2798 break;
2799
2800 case ISIS_TLV_MT_IP_REACH:
2801 mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
2802 if (mt_len == 0) { /* did something go wrong ? */
2803 goto trunc;
2804 }
2805 tptr+=mt_len;
2806 tmp-=mt_len;
2807
2808 while (tmp>0) {
2809 ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET);
2810 if (ext_ip_len == 0) /* did something go wrong ? */
2811 goto trunc;
2812 tptr+=ext_ip_len;
2813 tmp-=ext_ip_len;
2814 }
2815 break;
2816
2817 case ISIS_TLV_IP6_REACH:
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 trunc;
2822 tptr+=ext_ip_len;
2823 tmp-=ext_ip_len;
2824 }
2825 break;
2826
2827 case ISIS_TLV_MT_IP6_REACH:
2828 mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
2829 if (mt_len == 0) { /* did something go wrong ? */
2830 goto trunc;
2831 }
2832 tptr+=mt_len;
2833 tmp-=mt_len;
2834
2835 while (tmp>0) {
2836 ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET6);
2837 if (ext_ip_len == 0) /* did something go wrong ? */
2838 goto trunc;
2839 tptr+=ext_ip_len;
2840 tmp-=ext_ip_len;
2841 }
2842 break;
2843
2844 case ISIS_TLV_IP6ADDR:
2845 while (tmp>=sizeof(nd_ipv6)) {
2846 ND_TCHECK_LEN(tptr, sizeof(nd_ipv6));
2847
2848 ND_PRINT("\n\t IPv6 interface address: %s",
2849 ip6addr_string(ndo, tptr));
2850
2851 tptr += sizeof(nd_ipv6);
2852 tmp -= sizeof(nd_ipv6);
2853 }
2854 break;
2855 case ISIS_TLV_AUTH:
2856 ND_TCHECK_1(tptr);
2857
2858 ND_PRINT("\n\t %s: ",
2859 tok2str(isis_subtlv_auth_values,
2860 "unknown Authentication type 0x%02x",
2861 EXTRACT_U_1(tptr)));
2862
2863 switch (EXTRACT_U_1(tptr)) {
2864 case ISIS_SUBTLV_AUTH_SIMPLE:
2865 if (nd_printzp(ndo, tptr + 1, tlv_len - 1, ndo->ndo_snapend))
2866 goto trunc;
2867 break;
2868 case ISIS_SUBTLV_AUTH_MD5:
2869 for(i=1;i<tlv_len;i++) {
2870 ND_TCHECK_1(tptr + i);
2871 ND_PRINT("%02x", EXTRACT_U_1(tptr + i));
2872 }
2873 if (tlv_len != ISIS_SUBTLV_AUTH_MD5_LEN+1)
2874 ND_PRINT(", (invalid subTLV) ");
2875
2876 sigcheck = signature_verify(ndo, optr, length, tptr + 1,
2877 isis_clear_checksum_lifetime,
2878 header_lsp);
2879 ND_PRINT(" (%s)", tok2str(signature_check_values, "Unknown", sigcheck));
2880
2881 break;
2882 case ISIS_SUBTLV_AUTH_GENERIC:
2883 ND_TCHECK_2(tptr + 1);
2884 key_id = EXTRACT_BE_U_2(tptr + 1);
2885 ND_PRINT("%u, password: ", key_id);
2886 for(i=1 + sizeof(uint16_t);i<tlv_len;i++) {
2887 ND_TCHECK_1(tptr + i);
2888 ND_PRINT("%02x", EXTRACT_U_1(tptr + i));
2889 }
2890 break;
2891 case ISIS_SUBTLV_AUTH_PRIVATE:
2892 default:
2893 if (!print_unknown_data(ndo, tptr + 1, "\n\t\t ", tlv_len - 1))
2894 return(0);
2895 break;
2896 }
2897 break;
2898
2899 case ISIS_TLV_PTP_ADJ:
2900 tlv_ptp_adj = (const struct isis_tlv_ptp_adj *)tptr;
2901 if(tmp>=1) {
2902 ND_TCHECK_1(tptr);
2903 ND_PRINT("\n\t Adjacency State: %s (%u)",
2904 tok2str(isis_ptp_adjancey_values, "unknown", EXTRACT_U_1(tptr)),
2905 EXTRACT_U_1(tptr));
2906 tmp--;
2907 }
2908 if(tmp>sizeof(tlv_ptp_adj->extd_local_circuit_id)) {
2909 ND_TCHECK_4(tlv_ptp_adj->extd_local_circuit_id);
2910 ND_PRINT("\n\t Extended Local circuit-ID: 0x%08x",
2911 EXTRACT_BE_U_4(tlv_ptp_adj->extd_local_circuit_id));
2912 tmp-=sizeof(tlv_ptp_adj->extd_local_circuit_id);
2913 }
2914 if(tmp>=SYSTEM_ID_LEN) {
2915 ND_TCHECK_LEN(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN);
2916 ND_PRINT("\n\t Neighbor System-ID: %s",
2917 isis_print_id(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN));
2918 tmp-=SYSTEM_ID_LEN;
2919 }
2920 if(tmp>=sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)) {
2921 ND_TCHECK_4(tlv_ptp_adj->neighbor_extd_local_circuit_id);
2922 ND_PRINT("\n\t Neighbor Extended Local circuit-ID: 0x%08x",
2923 EXTRACT_BE_U_4(tlv_ptp_adj->neighbor_extd_local_circuit_id));
2924 }
2925 break;
2926
2927 case ISIS_TLV_PROTOCOLS:
2928 ND_PRINT("\n\t NLPID(s): ");
2929 while (tmp>0) {
2930 ND_TCHECK_1(tptr);
2931 ND_PRINT("%s (0x%02x)",
2932 tok2str(nlpid_values,
2933 "unknown",
2934 EXTRACT_U_1(tptr)),
2935 EXTRACT_U_1(tptr));
2936 if (tmp>1) /* further NPLIDs ? - put comma */
2937 ND_PRINT(", ");
2938 tptr++;
2939 tmp--;
2940 }
2941 break;
2942
2943 case ISIS_TLV_MT_PORT_CAP:
2944 {
2945 ND_TCHECK_2(tptr);
2946
2947 ND_PRINT("\n\t RES: %u, MTID(s): %u",
2948 (EXTRACT_BE_U_2(tptr) >> 12),
2949 (EXTRACT_BE_U_2(tptr) & 0x0fff));
2950
2951 tmp = tmp-2;
2952 tptr = tptr+2;
2953
2954 if (tmp)
2955 isis_print_mt_port_cap_subtlv(ndo, tptr, tmp);
2956
2957 break;
2958 }
2959
2960 case ISIS_TLV_MT_CAPABILITY:
2961
2962 ND_TCHECK_2(tptr);
2963
2964 ND_PRINT("\n\t O: %u, RES: %u, MTID(s): %u",
2965 (EXTRACT_BE_U_2(tptr) >> 15) & 0x01,
2966 (EXTRACT_BE_U_2(tptr) >> 12) & 0x07,
2967 EXTRACT_BE_U_2(tptr) & 0x0fff);
2968
2969 tmp = tmp-2;
2970 tptr = tptr+2;
2971
2972 if (tmp)
2973 isis_print_mt_capability_subtlv(ndo, tptr, tmp);
2974
2975 break;
2976
2977 case ISIS_TLV_TE_ROUTER_ID:
2978 ND_TCHECK_LEN(pptr, sizeof(nd_ipv4));
2979 ND_PRINT("\n\t Traffic Engineering Router ID: %s", ipaddr_string(ndo, pptr));
2980 break;
2981
2982 case ISIS_TLV_IPADDR:
2983 while (tmp>=sizeof(nd_ipv4)) {
2984 ND_TCHECK_LEN(tptr, sizeof(nd_ipv4));
2985 ND_PRINT("\n\t IPv4 interface address: %s", ipaddr_string(ndo, tptr));
2986 tptr += sizeof(nd_ipv4);
2987 tmp -= sizeof(nd_ipv4);
2988 }
2989 break;
2990
2991 case ISIS_TLV_HOSTNAME:
2992 ND_PRINT("\n\t Hostname: ");
2993 if (nd_printzp(ndo, tptr, tmp, ndo->ndo_snapend))
2994 goto trunc;
2995 break;
2996
2997 case ISIS_TLV_SHARED_RISK_GROUP:
2998 if (tmp < NODE_ID_LEN)
2999 break;
3000 ND_TCHECK_LEN(tptr, NODE_ID_LEN);
3001 ND_PRINT("\n\t IS Neighbor: %s", isis_print_id(tptr, NODE_ID_LEN));
3002 tptr+=NODE_ID_LEN;
3003 tmp-=NODE_ID_LEN;
3004
3005 if (tmp < 1)
3006 break;
3007 ND_TCHECK_1(tptr);
3008 ND_PRINT(", Flags: [%s]", ISIS_MASK_TLV_SHARED_RISK_GROUP(EXTRACT_U_1(tptr)) ? "numbered" : "unnumbered");
3009 tptr++;
3010 tmp--;
3011
3012 if (tmp < sizeof(nd_ipv4))
3013 break;
3014 ND_TCHECK_LEN(tptr, sizeof(nd_ipv4));
3015 ND_PRINT("\n\t IPv4 interface address: %s", ipaddr_string(ndo, tptr));
3016 tptr+=sizeof(nd_ipv4);
3017 tmp-=sizeof(nd_ipv4);
3018
3019 if (tmp < sizeof(nd_ipv4))
3020 break;
3021 ND_TCHECK_LEN(tptr, sizeof(nd_ipv4));
3022 ND_PRINT("\n\t IPv4 neighbor address: %s", ipaddr_string(ndo, tptr));
3023 tptr+=sizeof(nd_ipv4);
3024 tmp-=sizeof(nd_ipv4);
3025
3026 while (tmp>=4) {
3027 ND_TCHECK_4(tptr);
3028 ND_PRINT("\n\t Link-ID: 0x%08x", EXTRACT_BE_U_4(tptr));
3029 tptr+=4;
3030 tmp-=4;
3031 }
3032 break;
3033
3034 case ISIS_TLV_LSP:
3035 tlv_lsp = (const struct isis_tlv_lsp *)tptr;
3036 while(tmp>=sizeof(struct isis_tlv_lsp)) {
3037 ND_TCHECK_1(tlv_lsp->lsp_id + LSP_ID_LEN - 1);
3038 ND_PRINT("\n\t lsp-id: %s",
3039 isis_print_id(tlv_lsp->lsp_id, LSP_ID_LEN));
3040 ND_TCHECK_4(tlv_lsp->sequence_number);
3041 ND_PRINT(", seq: 0x%08x", EXTRACT_BE_U_4(tlv_lsp->sequence_number));
3042 ND_TCHECK_2(tlv_lsp->remaining_lifetime);
3043 ND_PRINT(", lifetime: %5ds", EXTRACT_BE_U_2(tlv_lsp->remaining_lifetime));
3044 ND_TCHECK_2(tlv_lsp->checksum);
3045 ND_PRINT(", chksum: 0x%04x", EXTRACT_BE_U_2(tlv_lsp->checksum));
3046 tmp-=sizeof(struct isis_tlv_lsp);
3047 tlv_lsp++;
3048 }
3049 break;
3050
3051 case ISIS_TLV_CHECKSUM:
3052 if (tmp < ISIS_TLV_CHECKSUM_MINLEN)
3053 break;
3054 ND_TCHECK_LEN(tptr, ISIS_TLV_CHECKSUM_MINLEN);
3055 ND_PRINT("\n\t checksum: 0x%04x ", EXTRACT_BE_U_2(tptr));
3056 /* do not attempt to verify the checksum if it is zero
3057 * most likely a HMAC-MD5 TLV is also present and
3058 * to avoid conflicts the checksum TLV is zeroed.
3059 * see rfc3358 for details
3060 */
3061 osi_print_cksum(ndo, optr, EXTRACT_BE_U_2(tptr), (int)(tptr-optr),
3062 length);
3063 break;
3064
3065 case ISIS_TLV_POI:
3066 if (tlv_len >= SYSTEM_ID_LEN + 1) {
3067 ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN + 1);
3068 ND_PRINT("\n\t Purge Originator System-ID: %s",
3069 isis_print_id(tptr + 1, SYSTEM_ID_LEN));
3070 }
3071
3072 if (tlv_len == 2 * SYSTEM_ID_LEN + 1) {
3073 ND_TCHECK_LEN(tptr, 2 * SYSTEM_ID_LEN + 1);
3074 ND_PRINT("\n\t Received from System-ID: %s",
3075 isis_print_id(tptr + SYSTEM_ID_LEN + 1, SYSTEM_ID_LEN));
3076 }
3077 break;
3078
3079 case ISIS_TLV_MT_SUPPORTED:
3080 if (tmp < ISIS_TLV_MT_SUPPORTED_MINLEN)
3081 break;
3082 while (tmp>1) {
3083 /* length can only be a multiple of 2, otherwise there is
3084 something broken -> so decode down until length is 1 */
3085 if (tmp!=1) {
3086 mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
3087 if (mt_len == 0) /* did something go wrong ? */
3088 goto trunc;
3089 tptr+=mt_len;
3090 tmp-=mt_len;
3091 } else {
3092 ND_PRINT("\n\t invalid MT-ID");
3093 break;
3094 }
3095 }
3096 break;
3097
3098 case ISIS_TLV_RESTART_SIGNALING:
3099 /* first attempt to decode the flags */
3100 if (tmp < ISIS_TLV_RESTART_SIGNALING_FLAGLEN)
3101 break;
3102 ND_TCHECK_LEN(tptr, ISIS_TLV_RESTART_SIGNALING_FLAGLEN);
3103 ND_PRINT("\n\t Flags [%s]",
3104 bittok2str(isis_restart_flag_values, "none", EXTRACT_U_1(tptr)));
3105 tptr+=ISIS_TLV_RESTART_SIGNALING_FLAGLEN;
3106 tmp-=ISIS_TLV_RESTART_SIGNALING_FLAGLEN;
3107
3108 /* is there anything other than the flags field? */
3109 if (tmp == 0)
3110 break;
3111
3112 if (tmp < ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN)
3113 break;
3114 ND_TCHECK_LEN(tptr, ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN);
3115
3116 ND_PRINT(", Remaining holding time %us", EXTRACT_BE_U_2(tptr));
3117 tptr+=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN;
3118 tmp-=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN;
3119
3120 /* is there an additional sysid field present ?*/
3121 if (tmp == SYSTEM_ID_LEN) {
3122 ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN);
3123 ND_PRINT(", for %s", isis_print_id(tptr,SYSTEM_ID_LEN));
3124 }
3125 break;
3126
3127 case ISIS_TLV_IDRP_INFO:
3128 if (tmp < ISIS_TLV_IDRP_INFO_MINLEN)
3129 break;
3130 ND_TCHECK_LEN(tptr, ISIS_TLV_IDRP_INFO_MINLEN);
3131 ND_PRINT("\n\t Inter-Domain Information Type: %s",
3132 tok2str(isis_subtlv_idrp_values,
3133 "Unknown (0x%02x)",
3134 EXTRACT_U_1(tptr)));
3135 isis_subtlv_idrp = EXTRACT_U_1(tptr);
3136 tptr++;
3137 switch (isis_subtlv_idrp) {
3138 case ISIS_SUBTLV_IDRP_ASN:
3139 ND_TCHECK_2(tptr); /* fetch AS number */
3140 ND_PRINT("AS Number: %u", EXTRACT_BE_U_2(tptr));
3141 break;
3142 case ISIS_SUBTLV_IDRP_LOCAL:
3143 case ISIS_SUBTLV_IDRP_RES:
3144 default:
3145 if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_len - 1))
3146 return(0);
3147 break;
3148 }
3149 break;
3150
3151 case ISIS_TLV_LSP_BUFFERSIZE:
3152 if (tmp < ISIS_TLV_LSP_BUFFERSIZE_MINLEN)
3153 break;
3154 ND_TCHECK_LEN(tptr, ISIS_TLV_LSP_BUFFERSIZE_MINLEN);
3155 ND_PRINT("\n\t LSP Buffersize: %u", EXTRACT_BE_U_2(tptr));
3156 break;
3157
3158 case ISIS_TLV_PART_DIS:
3159 while (tmp >= SYSTEM_ID_LEN) {
3160 ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN);
3161 ND_PRINT("\n\t %s", isis_print_id(tptr, SYSTEM_ID_LEN));
3162 tptr+=SYSTEM_ID_LEN;
3163 tmp-=SYSTEM_ID_LEN;
3164 }
3165 break;
3166
3167 case ISIS_TLV_PREFIX_NEIGH:
3168 if (tmp < sizeof(struct isis_metric_block))
3169 break;
3170 ND_TCHECK_LEN(tptr, sizeof(struct isis_metric_block));
3171 ND_PRINT("\n\t Metric Block");
3172 isis_print_metric_block(ndo, (const struct isis_metric_block *)tptr);
3173 tptr+=sizeof(struct isis_metric_block);
3174 tmp-=sizeof(struct isis_metric_block);
3175
3176 while(tmp>0) {
3177 ND_TCHECK_1(tptr);
3178 prefix_len=EXTRACT_U_1(tptr); /* read out prefix length in semioctets*/
3179 tptr++;
3180 if (prefix_len < 2) {
3181 ND_PRINT("\n\t\tAddress: prefix length %u < 2", prefix_len);
3182 break;
3183 }
3184 tmp--;
3185 if (tmp < prefix_len/2)
3186 break;
3187 ND_TCHECK_LEN(tptr, prefix_len / 2);
3188 ND_PRINT("\n\t\tAddress: %s/%u",
3189 isonsap_string(ndo, tptr, prefix_len / 2), prefix_len * 4);
3190 tptr+=prefix_len/2;
3191 tmp-=prefix_len/2;
3192 }
3193 break;
3194
3195 case ISIS_TLV_IIH_SEQNR:
3196 if (tmp < ISIS_TLV_IIH_SEQNR_MINLEN)
3197 break;
3198 ND_TCHECK_LEN(tptr, ISIS_TLV_IIH_SEQNR_MINLEN); /* check if four bytes are on the wire */
3199 ND_PRINT("\n\t Sequence number: %u", EXTRACT_BE_U_4(tptr));
3200 break;
3201
3202 case ISIS_TLV_VENDOR_PRIVATE:
3203 if (tmp < ISIS_TLV_VENDOR_PRIVATE_MINLEN)
3204 break;
3205 ND_TCHECK_LEN(tptr, ISIS_TLV_VENDOR_PRIVATE_MINLEN); /* check if enough byte for a full oui */
3206 vendor_id = EXTRACT_BE_U_3(tptr);
3207 ND_PRINT("\n\t Vendor: %s (%u)",
3208 tok2str(oui_values, "Unknown", vendor_id),
3209 vendor_id);
3210 tptr+=3;
3211 tmp-=3;
3212 if (tmp > 0) /* hexdump the rest */
3213 if (!print_unknown_data(ndo, tptr, "\n\t\t", tmp))
3214 return(0);
3215 break;
3216 /*
3217 * FIXME those are the defined TLVs that lack a decoder
3218 * you are welcome to contribute code ;-)
3219 */
3220
3221 case ISIS_TLV_DECNET_PHASE4:
3222 case ISIS_TLV_LUCENT_PRIVATE:
3223 case ISIS_TLV_IPAUTH:
3224 case ISIS_TLV_NORTEL_PRIVATE1:
3225 case ISIS_TLV_NORTEL_PRIVATE2:
3226
3227 default:
3228 if (ndo->ndo_vflag <= 1) {
3229 if (!print_unknown_data(ndo, pptr, "\n\t\t", tlv_len))
3230 return(0);
3231 }
3232 break;
3233 }
3234 /* do we want to see an additionally hexdump ? */
3235 if (ndo->ndo_vflag> 1) {
3236 if (!print_unknown_data(ndo, pptr, "\n\t ", tlv_len))
3237 return(0);
3238 }
3239
3240 pptr += tlv_len;
3241 packet_len -= tlv_len;
3242 }
3243
3244 if (packet_len != 0) {
3245 ND_PRINT("\n\t %u straggler bytes", packet_len);
3246 }
3247 return (1);
3248
3249 trunc:
3250 nd_print_trunc(ndo);
3251 return (1);
3252 }
3253
3254 static void
3255 osi_print_cksum(netdissect_options *ndo, const uint8_t *pptr,
3256 uint16_t checksum, int checksum_offset, u_int length)
3257 {
3258 uint16_t calculated_checksum;
3259
3260 /* do not attempt to verify the checksum if it is zero,
3261 * if the offset is nonsense,
3262 * or the base pointer is not sane
3263 */
3264 if (!checksum
3265 || checksum_offset < 0
3266 || !ND_TTEST_2(pptr + checksum_offset)
3267 || (u_int)checksum_offset > length
3268 || !ND_TTEST_LEN(pptr, length)) {
3269 ND_PRINT(" (unverified)");
3270 } else {
3271 #if 0
3272 printf("\nosi_print_cksum: %p %d %u\n", pptr, checksum_offset, length);
3273 #endif
3274 calculated_checksum = create_osi_cksum(pptr, checksum_offset, length);
3275 if (checksum == calculated_checksum) {
3276 ND_PRINT(" (correct)");
3277 } else {
3278 ND_PRINT(" (incorrect should be 0x%04x)", calculated_checksum);
3279 }
3280 }
3281 }
[mirror] the TCPdump network dissector