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Add more nd_print_trunc() calls
[tcpdump] / print-isoclns.c
1 /*
2 * Copyright (c) 1992, 1993, 1994, 1995, 1996
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 *
21 * Original code by Matt Thomas, Digital Equipment Corporation
22 *
23 * Extensively modified by Hannes Gredler (hannes@gredler.at) for more
24 * complete IS-IS & CLNP support.
25 */
26
27 /* \summary: ISO CLNS, ESIS, and ISIS printer */
28
29 /*
30 * specification:
31 *
32 * CLNP: ISO 8473
33 * ES-IS: ISO 9542
34 * IS-IS: ISO 10589
35 */
36
37 #ifdef HAVE_CONFIG_H
38 #include <config.h>
39 #endif
40
41 #include "netdissect-stdinc.h"
42
43 #include <string.h>
44
45 #include "netdissect.h"
46 #include "addrtoname.h"
47 #include "nlpid.h"
48 #include "extract.h"
49 #include "gmpls.h"
50 #include "oui.h"
51 #include "signature.h"
52
53
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 if (!ND_TTEST_1(p)) { /* enough bytes on the wire ? */
683 ND_PRINT("|OSI");
684 return;
685 }
686
687 if (ndo->ndo_eflag)
688 ND_PRINT("OSI NLPID %s (0x%02x): ", tok2str(nlpid_values, "Unknown", EXTRACT_U_1(p)), EXTRACT_U_1(p));
689
690 switch (EXTRACT_U_1(p)) {
691
692 case NLPID_CLNP:
693 if (!clnp_print(ndo, p, length))
694 print_unknown_data(ndo, p, "\n\t", length);
695 break;
696
697 case NLPID_ESIS:
698 esis_print(ndo, p, length);
699 return;
700
701 case NLPID_ISIS:
702 if (!isis_print(ndo, p, length))
703 print_unknown_data(ndo, p, "\n\t", length);
704 break;
705
706 case NLPID_NULLNS:
707 ND_PRINT("%slength: %u", ndo->ndo_eflag ? "" : ", ", length);
708 break;
709
710 case NLPID_Q933:
711 q933_print(ndo, p + 1, length - 1);
712 break;
713
714 case NLPID_IP:
715 ip_print(ndo, p + 1, length - 1);
716 break;
717
718 case NLPID_IP6:
719 ip6_print(ndo, p + 1, length - 1);
720 break;
721
722 case NLPID_PPP:
723 ppp_print(ndo, p + 1, length - 1);
724 break;
725
726 default:
727 if (!ndo->ndo_eflag)
728 ND_PRINT("OSI NLPID 0x%02x unknown", EXTRACT_U_1(p));
729 ND_PRINT("%slength: %u", ndo->ndo_eflag ? "" : ", ", length);
730 if (length > 1)
731 print_unknown_data(ndo, p, "\n\t", length);
732 break;
733 }
734 }
735
736 #define CLNP_PDU_ER 1
737 #define CLNP_PDU_DT 28
738 #define CLNP_PDU_MD 29
739 #define CLNP_PDU_ERQ 30
740 #define CLNP_PDU_ERP 31
741
742 static const struct tok clnp_pdu_values[] = {
743 { CLNP_PDU_ER, "Error Report"},
744 { CLNP_PDU_MD, "MD"},
745 { CLNP_PDU_DT, "Data"},
746 { CLNP_PDU_ERQ, "Echo Request"},
747 { CLNP_PDU_ERP, "Echo Response"},
748 { 0, NULL }
749 };
750
751 struct clnp_header_t {
752 nd_uint8_t nlpid;
753 nd_uint8_t length_indicator;
754 nd_uint8_t version;
755 nd_uint8_t lifetime; /* units of 500ms */
756 nd_uint8_t type;
757 nd_uint16_t segment_length;
758 nd_uint16_t cksum;
759 };
760
761 struct clnp_segment_header_t {
762 nd_uint16_t data_unit_id;
763 nd_uint16_t segment_offset;
764 nd_uint16_t total_length;
765 };
766
767 /*
768 * clnp_print
769 * Decode CLNP packets. Return 0 on error.
770 */
771
772 static int
773 clnp_print(netdissect_options *ndo,
774 const uint8_t *pptr, u_int length)
775 {
776 const uint8_t *optr,*source_address,*dest_address;
777 u_int li,li_remaining,tlen,nsap_offset,source_address_length,dest_address_length, clnp_pdu_type, clnp_flags;
778 const struct clnp_header_t *clnp_header;
779 const struct clnp_segment_header_t *clnp_segment_header;
780 uint8_t rfd_error,rfd_error_major,rfd_error_minor;
781
782 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 >= 2) {
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 case CLNP_PDU_DT:
1062 case CLNP_PDU_MD:
1063 case CLNP_PDU_ERQ:
1064
1065 default:
1066 /* dump the PDU specific data */
1067 if (length-(pptr-optr) > 0) {
1068 ND_PRINT("\n\t undecoded non-header data, length %u", length-li);
1069 print_unknown_data(ndo, pptr, "\n\t ", length - (pptr - optr));
1070 }
1071 }
1072
1073 return (1);
1074
1075 trunc:
1076 nd_print_trunc(ndo);
1077 return (1);
1078
1079 }
1080
1081
1082 #define ESIS_PDU_REDIRECT 6
1083 #define ESIS_PDU_ESH 2
1084 #define ESIS_PDU_ISH 4
1085
1086 static const struct tok esis_pdu_values[] = {
1087 { ESIS_PDU_REDIRECT, "redirect"},
1088 { ESIS_PDU_ESH, "ESH"},
1089 { ESIS_PDU_ISH, "ISH"},
1090 { 0, NULL }
1091 };
1092
1093 struct esis_header_t {
1094 nd_uint8_t nlpid;
1095 nd_uint8_t length_indicator;
1096 nd_uint8_t version;
1097 nd_byte reserved;
1098 nd_uint8_t type;
1099 nd_uint16_t holdtime;
1100 nd_uint16_t cksum;
1101 };
1102
1103 static void
1104 esis_print(netdissect_options *ndo,
1105 const uint8_t *pptr, u_int length)
1106 {
1107 const uint8_t *optr;
1108 u_int li, version, esis_pdu_type, source_address_length, source_address_number;
1109 const struct esis_header_t *esis_header;
1110
1111 ndo->ndo_protocol = "esis";
1112 if (!ndo->ndo_eflag)
1113 ND_PRINT("ES-IS");
1114
1115 if (length <= 2) {
1116 ND_PRINT(ndo->ndo_qflag ? "bad pkt!" : "no header at all!");
1117 return;
1118 }
1119
1120 esis_header = (const struct esis_header_t *) pptr;
1121 ND_TCHECK_SIZE(esis_header);
1122 li = EXTRACT_U_1(esis_header->length_indicator);
1123 optr = pptr;
1124
1125 /*
1126 * Sanity checking of the header.
1127 */
1128
1129 if (EXTRACT_U_1(esis_header->nlpid) != NLPID_ESIS) {
1130 ND_PRINT(" nlpid 0x%02x packet not supported", EXTRACT_U_1(esis_header->nlpid));
1131 return;
1132 }
1133
1134 version = EXTRACT_U_1(esis_header->version);
1135 if (version != ESIS_VERSION) {
1136 ND_PRINT(" version %u packet not supported", version);
1137 return;
1138 }
1139
1140 if (li > length) {
1141 ND_PRINT(" length indicator(%u) > PDU size (%u)!", li, length);
1142 return;
1143 }
1144
1145 if (li < sizeof(struct esis_header_t) + 2) {
1146 ND_PRINT(" length indicator %u < min PDU size:", li);
1147 while (pptr < ndo->ndo_snapend) {
1148 ND_PRINT("%02X", EXTRACT_U_1(pptr));
1149 pptr++;
1150 }
1151 return;
1152 }
1153
1154 esis_pdu_type = EXTRACT_U_1(esis_header->type) & ESIS_PDU_TYPE_MASK;
1155
1156 if (ndo->ndo_vflag < 1) {
1157 ND_PRINT("%s%s, length %u",
1158 ndo->ndo_eflag ? "" : ", ",
1159 tok2str(esis_pdu_values,"unknown type (%u)",esis_pdu_type),
1160 length);
1161 return;
1162 } else
1163 ND_PRINT("%slength %u\n\t%s (%u)",
1164 ndo->ndo_eflag ? "" : ", ",
1165 length,
1166 tok2str(esis_pdu_values,"unknown type: %u", esis_pdu_type),
1167 esis_pdu_type);
1168
1169 ND_PRINT(", v: %u%s", version, version == ESIS_VERSION ? "" : "unsupported" );
1170 ND_PRINT(", checksum: 0x%04x", EXTRACT_BE_U_2(esis_header->cksum));
1171
1172 osi_print_cksum(ndo, pptr, EXTRACT_BE_U_2(esis_header->cksum), 7,
1173 li);
1174
1175 ND_PRINT(", holding time: %us, length indicator: %u",
1176 EXTRACT_BE_U_2(esis_header->holdtime), li);
1177
1178 if (ndo->ndo_vflag > 1)
1179 print_unknown_data(ndo, optr, "\n\t", sizeof(struct esis_header_t));
1180
1181 pptr += sizeof(struct esis_header_t);
1182 li -= sizeof(struct esis_header_t);
1183
1184 switch (esis_pdu_type) {
1185 case ESIS_PDU_REDIRECT: {
1186 const uint8_t *dst, *snpa, *neta;
1187 u_int dstl, snpal, netal;
1188
1189 ND_TCHECK_1(pptr);
1190 if (li < 1) {
1191 ND_PRINT(", bad redirect/li");
1192 return;
1193 }
1194 dstl = EXTRACT_U_1(pptr);
1195 pptr++;
1196 li--;
1197 ND_TCHECK_LEN(pptr, dstl);
1198 if (li < dstl) {
1199 ND_PRINT(", bad redirect/li");
1200 return;
1201 }
1202 dst = pptr;
1203 pptr += dstl;
1204 li -= dstl;
1205 ND_PRINT("\n\t %s", isonsap_string(ndo, dst, dstl));
1206
1207 ND_TCHECK_1(pptr);
1208 if (li < 1) {
1209 ND_PRINT(", bad redirect/li");
1210 return;
1211 }
1212 snpal = EXTRACT_U_1(pptr);
1213 pptr++;
1214 li--;
1215 ND_TCHECK_LEN(pptr, snpal);
1216 if (li < snpal) {
1217 ND_PRINT(", bad redirect/li");
1218 return;
1219 }
1220 snpa = pptr;
1221 pptr += snpal;
1222 li -= snpal;
1223 ND_TCHECK_1(pptr);
1224 if (li < 1) {
1225 ND_PRINT(", bad redirect/li");
1226 return;
1227 }
1228 netal = EXTRACT_U_1(pptr);
1229 pptr++;
1230 ND_TCHECK_LEN(pptr, netal);
1231 if (li < netal) {
1232 ND_PRINT(", bad redirect/li");
1233 return;
1234 }
1235 neta = pptr;
1236 pptr += netal;
1237 li -= netal;
1238
1239 if (snpal == 6)
1240 ND_PRINT("\n\t SNPA (length: %u): %s",
1241 snpal,
1242 etheraddr_string(ndo, snpa));
1243 else
1244 ND_PRINT("\n\t SNPA (length: %u): %s",
1245 snpal,
1246 linkaddr_string(ndo, snpa, LINKADDR_OTHER, snpal));
1247 if (netal != 0)
1248 ND_PRINT("\n\t NET (length: %u) %s",
1249 netal,
1250 isonsap_string(ndo, neta, netal));
1251 break;
1252 }
1253
1254 case ESIS_PDU_ESH:
1255 ND_TCHECK_1(pptr);
1256 if (li < 1) {
1257 ND_PRINT(", bad esh/li");
1258 return;
1259 }
1260 source_address_number = EXTRACT_U_1(pptr);
1261 pptr++;
1262 li--;
1263
1264 ND_PRINT("\n\t Number of Source Addresses: %u", source_address_number);
1265
1266 while (source_address_number > 0) {
1267 ND_TCHECK_1(pptr);
1268 if (li < 1) {
1269 ND_PRINT(", bad esh/li");
1270 return;
1271 }
1272 source_address_length = EXTRACT_U_1(pptr);
1273 pptr++;
1274 li--;
1275
1276 ND_TCHECK_LEN(pptr, source_address_length);
1277 if (li < source_address_length) {
1278 ND_PRINT(", bad esh/li");
1279 return;
1280 }
1281 ND_PRINT("\n\t NET (length: %u): %s",
1282 source_address_length,
1283 isonsap_string(ndo, pptr, source_address_length));
1284 pptr += source_address_length;
1285 li -= source_address_length;
1286 source_address_number--;
1287 }
1288
1289 break;
1290
1291 case ESIS_PDU_ISH: {
1292 ND_TCHECK_1(pptr);
1293 if (li < 1) {
1294 ND_PRINT(", bad ish/li");
1295 return;
1296 }
1297 source_address_length = EXTRACT_U_1(pptr);
1298 pptr++;
1299 li--;
1300 ND_TCHECK_LEN(pptr, source_address_length);
1301 if (li < source_address_length) {
1302 ND_PRINT(", bad ish/li");
1303 return;
1304 }
1305 ND_PRINT("\n\t NET (length: %u): %s", source_address_length, isonsap_string(ndo, pptr, source_address_length));
1306 pptr += source_address_length;
1307 li -= source_address_length;
1308 break;
1309 }
1310
1311 default:
1312 if (ndo->ndo_vflag <= 1) {
1313 if (pptr < ndo->ndo_snapend)
1314 print_unknown_data(ndo, pptr, "\n\t ", ndo->ndo_snapend - pptr);
1315 }
1316 return;
1317 }
1318
1319 /* now walk the options */
1320 while (li != 0) {
1321 u_int op, opli;
1322 const uint8_t *tptr;
1323
1324 if (li < 2) {
1325 ND_PRINT(", bad opts/li");
1326 return;
1327 }
1328 ND_TCHECK_2(pptr);
1329 op = EXTRACT_U_1(pptr);
1330 opli = EXTRACT_U_1(pptr + 1);
1331 pptr += 2;
1332 li -= 2;
1333 if (opli > li) {
1334 ND_PRINT(", opt (%u) too long", op);
1335 return;
1336 }
1337 li -= opli;
1338 tptr = pptr;
1339
1340 ND_PRINT("\n\t %s Option #%u, length %u, value: ",
1341 tok2str(esis_option_values,"Unknown",op),
1342 op,
1343 opli);
1344
1345 switch (op) {
1346
1347 case ESIS_OPTION_ES_CONF_TIME:
1348 if (opli == 2) {
1349 ND_TCHECK_2(pptr);
1350 ND_PRINT("%us", EXTRACT_BE_U_2(tptr));
1351 } else
1352 ND_PRINT("(bad length)");
1353 break;
1354
1355 case ESIS_OPTION_PROTOCOLS:
1356 while (opli>0) {
1357 ND_TCHECK_1(tptr);
1358 ND_PRINT("%s (0x%02x)",
1359 tok2str(nlpid_values,
1360 "unknown",
1361 EXTRACT_U_1(tptr)),
1362 EXTRACT_U_1(tptr));
1363 if (opli>1) /* further NPLIDs ? - put comma */
1364 ND_PRINT(", ");
1365 tptr++;
1366 opli--;
1367 }
1368 break;
1369
1370 /*
1371 * FIXME those are the defined Options that lack a decoder
1372 * you are welcome to contribute code ;-)
1373 */
1374
1375 case ESIS_OPTION_QOS_MAINTENANCE:
1376 case ESIS_OPTION_SECURITY:
1377 case ESIS_OPTION_PRIORITY:
1378 case ESIS_OPTION_ADDRESS_MASK:
1379 case ESIS_OPTION_SNPA_MASK:
1380
1381 default:
1382 print_unknown_data(ndo, tptr, "\n\t ", opli);
1383 break;
1384 }
1385 if (ndo->ndo_vflag > 1)
1386 print_unknown_data(ndo, pptr, "\n\t ", opli);
1387 pptr += opli;
1388 }
1389 trunc:
1390 nd_print_trunc(ndo);
1391 }
1392
1393 static void
1394 isis_print_mcid(netdissect_options *ndo,
1395 const struct isis_spb_mcid *mcid)
1396 {
1397 int i;
1398
1399 ND_TCHECK_SIZE(mcid);
1400 ND_PRINT("ID: %u, Name: ", EXTRACT_U_1(mcid->format_id));
1401
1402 if (nd_printzp(ndo, mcid->name, 32, ndo->ndo_snapend))
1403 goto trunc;
1404
1405 ND_PRINT("\n\t Lvl: %u", EXTRACT_BE_U_2(mcid->revision_lvl));
1406
1407 ND_PRINT(", Digest: ");
1408
1409 for(i=0;i<16;i++)
1410 ND_PRINT("%.2x ", mcid->digest[i]);
1411
1412 trunc:
1413 nd_print_trunc(ndo);
1414 }
1415
1416 static int
1417 isis_print_mt_port_cap_subtlv(netdissect_options *ndo,
1418 const uint8_t *tptr, u_int len)
1419 {
1420 u_int stlv_type, stlv_len;
1421 const struct isis_subtlv_spb_mcid *subtlv_spb_mcid;
1422 int i;
1423
1424 while (len > 2)
1425 {
1426 ND_TCHECK_2(tptr);
1427 stlv_type = EXTRACT_U_1(tptr);
1428 stlv_len = EXTRACT_U_1(tptr + 1);
1429
1430 /* first lets see if we know the subTLVs name*/
1431 ND_PRINT("\n\t %s subTLV #%u, length: %u",
1432 tok2str(isis_mt_port_cap_subtlv_values, "unknown", stlv_type),
1433 stlv_type,
1434 stlv_len);
1435
1436 tptr = tptr + 2;
1437 /*len -= TLV_TYPE_LEN_OFFSET;*/
1438 len = len - 2;
1439
1440 /* Make sure the subTLV fits within the space left */
1441 if (len < stlv_len)
1442 goto trunc;
1443 /* Make sure the entire subTLV is in the captured data */
1444 ND_TCHECK_LEN(tptr, stlv_len);
1445
1446 switch (stlv_type)
1447 {
1448 case ISIS_SUBTLV_SPB_MCID:
1449 {
1450 if (stlv_len < ISIS_SUBTLV_SPB_MCID_MIN_LEN)
1451 goto trunc;
1452
1453 subtlv_spb_mcid = (const struct isis_subtlv_spb_mcid *)tptr;
1454
1455 ND_PRINT("\n\t MCID: ");
1456 isis_print_mcid(ndo, &(subtlv_spb_mcid->mcid));
1457
1458 /*tptr += SPB_MCID_MIN_LEN;
1459 len -= SPB_MCID_MIN_LEN; */
1460
1461 ND_PRINT("\n\t AUX-MCID: ");
1462 isis_print_mcid(ndo, &(subtlv_spb_mcid->aux_mcid));
1463
1464 /*tptr += SPB_MCID_MIN_LEN;
1465 len -= SPB_MCID_MIN_LEN; */
1466 tptr = tptr + ISIS_SUBTLV_SPB_MCID_MIN_LEN;
1467 len = len - ISIS_SUBTLV_SPB_MCID_MIN_LEN;
1468 stlv_len = stlv_len - ISIS_SUBTLV_SPB_MCID_MIN_LEN;
1469
1470 break;
1471 }
1472
1473 case ISIS_SUBTLV_SPB_DIGEST:
1474 {
1475 if (stlv_len < ISIS_SUBTLV_SPB_DIGEST_MIN_LEN)
1476 goto trunc;
1477
1478 ND_PRINT("\n\t RES: %u V: %u A: %u D: %u",
1479 (EXTRACT_U_1(tptr) >> 5),
1480 ((EXTRACT_U_1(tptr) >> 4) & 0x01),
1481 ((EXTRACT_U_1(tptr) >> 2) & 0x03),
1482 (EXTRACT_U_1(tptr) & 0x03));
1483
1484 tptr++;
1485
1486 ND_PRINT("\n\t Digest: ");
1487
1488 for(i=1;i<=8; i++)
1489 {
1490 ND_PRINT("%08x ", EXTRACT_BE_U_4(tptr));
1491 if (i%4 == 0 && i != 8)
1492 ND_PRINT("\n\t ");
1493 tptr = tptr + 4;
1494 }
1495
1496 len = len - ISIS_SUBTLV_SPB_DIGEST_MIN_LEN;
1497 stlv_len = stlv_len - ISIS_SUBTLV_SPB_DIGEST_MIN_LEN;
1498
1499 break;
1500 }
1501
1502 case ISIS_SUBTLV_SPB_BVID:
1503 {
1504 while (stlv_len >= ISIS_SUBTLV_SPB_BVID_MIN_LEN)
1505 {
1506 ND_PRINT("\n\t ECT: %08x",
1507 EXTRACT_BE_U_4(tptr));
1508
1509 tptr = tptr+4;
1510
1511 ND_PRINT(" BVID: %u, U:%01x M:%01x ",
1512 (EXTRACT_BE_U_2(tptr) >> 4) ,
1513 (EXTRACT_BE_U_2(tptr) >> 3) & 0x01,
1514 (EXTRACT_BE_U_2(tptr) >> 2) & 0x01);
1515
1516 tptr = tptr + 2;
1517 len = len - ISIS_SUBTLV_SPB_BVID_MIN_LEN;
1518 stlv_len = stlv_len - ISIS_SUBTLV_SPB_BVID_MIN_LEN;
1519 }
1520
1521 break;
1522 }
1523
1524 default:
1525 break;
1526 }
1527 tptr += stlv_len;
1528 len -= stlv_len;
1529 }
1530
1531 return 0;
1532
1533 trunc:
1534 nd_print_trunc(ndo);
1535 return(1);
1536 }
1537
1538 static int
1539 isis_print_mt_capability_subtlv(netdissect_options *ndo,
1540 const uint8_t *tptr, u_int len)
1541 {
1542 u_int stlv_type, stlv_len, tmp;
1543
1544 while (len > 2)
1545 {
1546 ND_TCHECK_2(tptr);
1547 stlv_type = EXTRACT_U_1(tptr);
1548 stlv_len = EXTRACT_U_1(tptr + 1);
1549 tptr = tptr + 2;
1550 len = len - 2;
1551
1552 /* first lets see if we know the subTLVs name*/
1553 ND_PRINT("\n\t %s subTLV #%u, length: %u",
1554 tok2str(isis_mt_capability_subtlv_values, "unknown", stlv_type),
1555 stlv_type,
1556 stlv_len);
1557
1558 /* Make sure the subTLV fits within the space left */
1559 if (len < stlv_len)
1560 goto trunc;
1561 /* Make sure the entire subTLV is in the captured data */
1562 ND_TCHECK_LEN(tptr, stlv_len);
1563
1564 switch (stlv_type)
1565 {
1566 case ISIS_SUBTLV_SPB_INSTANCE:
1567 if (stlv_len < ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN)
1568 goto trunc;
1569
1570 ND_PRINT("\n\t CIST Root-ID: %08x", EXTRACT_BE_U_4(tptr));
1571 tptr = tptr+4;
1572 ND_PRINT(" %08x", EXTRACT_BE_U_4(tptr));
1573 tptr = tptr+4;
1574 ND_PRINT(", Path Cost: %08x", EXTRACT_BE_U_4(tptr));
1575 tptr = tptr+4;
1576 ND_PRINT(", Prio: %u", EXTRACT_BE_U_2(tptr));
1577 tptr = tptr + 2;
1578 ND_PRINT("\n\t RES: %u",
1579 EXTRACT_BE_U_2(tptr) >> 5);
1580 ND_PRINT(", V: %u",
1581 (EXTRACT_BE_U_2(tptr) >> 4) & 0x0001);
1582 ND_PRINT(", SPSource-ID: %u",
1583 (EXTRACT_BE_U_4(tptr) & 0x000fffff));
1584 tptr = tptr+4;
1585 ND_PRINT(", No of Trees: %x", EXTRACT_U_1(tptr));
1586
1587 tmp = EXTRACT_U_1(tptr);
1588 tptr++;
1589
1590 len = len - ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN;
1591 stlv_len = stlv_len - ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN;
1592
1593 while (tmp)
1594 {
1595 if (stlv_len < ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN)
1596 goto trunc;
1597
1598 ND_PRINT("\n\t U:%u, M:%u, A:%u, RES:%u",
1599 EXTRACT_U_1(tptr) >> 7,
1600 (EXTRACT_U_1(tptr) >> 6) & 0x01,
1601 (EXTRACT_U_1(tptr) >> 5) & 0x01,
1602 (EXTRACT_U_1(tptr) & 0x1f));
1603
1604 tptr++;
1605
1606 ND_PRINT(", ECT: %08x", EXTRACT_BE_U_4(tptr));
1607
1608 tptr = tptr + 4;
1609
1610 ND_PRINT(", BVID: %u, SPVID: %u",
1611 (EXTRACT_BE_U_3(tptr) >> 12) & 0x000fff,
1612 EXTRACT_BE_U_3(tptr) & 0x000fff);
1613
1614 tptr = tptr + 3;
1615 len = len - ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN;
1616 stlv_len = stlv_len - ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN;
1617 tmp--;
1618 }
1619
1620 break;
1621
1622 case ISIS_SUBTLV_SPBM_SI:
1623 if (stlv_len < 8)
1624 goto trunc;
1625
1626 ND_PRINT("\n\t BMAC: %08x", EXTRACT_BE_U_4(tptr));
1627 tptr = tptr+4;
1628 ND_PRINT("%04x", EXTRACT_BE_U_2(tptr));
1629 tptr = tptr+2;
1630
1631 ND_PRINT(", RES: %u, VID: %u", EXTRACT_BE_U_2(tptr) >> 12,
1632 (EXTRACT_BE_U_2(tptr)) & 0x0fff);
1633
1634 tptr = tptr+2;
1635 len = len - 8;
1636 stlv_len = stlv_len - 8;
1637
1638 while (stlv_len >= 4) {
1639 ND_TCHECK_4(tptr);
1640 ND_PRINT("\n\t T: %u, R: %u, RES: %u, ISID: %u",
1641 (EXTRACT_BE_U_4(tptr) >> 31),
1642 (EXTRACT_BE_U_4(tptr) >> 30) & 0x01,
1643 (EXTRACT_BE_U_4(tptr) >> 24) & 0x03f,
1644 (EXTRACT_BE_U_4(tptr)) & 0x0ffffff);
1645
1646 tptr = tptr + 4;
1647 len = len - 4;
1648 stlv_len = stlv_len - 4;
1649 }
1650
1651 break;
1652
1653 default:
1654 break;
1655 }
1656 tptr += stlv_len;
1657 len -= stlv_len;
1658 }
1659 return 0;
1660
1661 trunc:
1662 nd_print_trunc(ndo);
1663 return(1);
1664 }
1665
1666 /* shared routine for printing system, node and lsp-ids */
1667 static char *
1668 isis_print_id(const uint8_t *cp, u_int id_len)
1669 {
1670 u_int i;
1671 static char id[sizeof("xxxx.xxxx.xxxx.yy-zz")];
1672 char *pos = id;
1673 u_int sysid_len;
1674
1675 sysid_len = SYSTEM_ID_LEN;
1676 if (sysid_len > id_len)
1677 sysid_len = id_len;
1678 for (i = 1; i <= sysid_len; i++) {
1679 nd_snprintf(pos, sizeof(id) - (pos - id), "%02x", EXTRACT_U_1(cp));
1680 cp++;
1681 pos += strlen(pos);
1682 if (i == 2 || i == 4)
1683 *pos++ = '.';
1684 }
1685 if (id_len >= NODE_ID_LEN) {
1686 nd_snprintf(pos, sizeof(id) - (pos - id), ".%02x", EXTRACT_U_1(cp));
1687 cp++;
1688 pos += strlen(pos);
1689 }
1690 if (id_len == LSP_ID_LEN)
1691 nd_snprintf(pos, sizeof(id) - (pos - id), "-%02x", EXTRACT_U_1(cp));
1692 return (id);
1693 }
1694
1695 /* print the 4-byte metric block which is common found in the old-style TLVs */
1696 static int
1697 isis_print_metric_block(netdissect_options *ndo,
1698 const struct isis_metric_block *isis_metric_block)
1699 {
1700 ND_PRINT(", Default Metric: %u, %s",
1701 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_default),
1702 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_default) ? "External" : "Internal");
1703 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_delay))
1704 ND_PRINT("\n\t\t Delay Metric: %u, %s",
1705 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_delay),
1706 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_delay) ? "External" : "Internal");
1707 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_expense))
1708 ND_PRINT("\n\t\t Expense Metric: %u, %s",
1709 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_expense),
1710 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_expense) ? "External" : "Internal");
1711 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_error))
1712 ND_PRINT("\n\t\t Error Metric: %u, %s",
1713 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_error),
1714 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_error) ? "External" : "Internal");
1715
1716 return(1); /* everything is ok */
1717 }
1718
1719 static int
1720 isis_print_tlv_ip_reach(netdissect_options *ndo,
1721 const uint8_t *cp, const char *ident, u_int length)
1722 {
1723 int prefix_len;
1724 const struct isis_tlv_ip_reach *tlv_ip_reach;
1725
1726 tlv_ip_reach = (const struct isis_tlv_ip_reach *)cp;
1727
1728 while (length > 0) {
1729 if ((size_t)length < sizeof(*tlv_ip_reach)) {
1730 ND_PRINT("short IPv4 Reachability (%u vs %lu)",
1731 length,
1732 (unsigned long)sizeof(*tlv_ip_reach));
1733 return (0);
1734 }
1735
1736 if (!ND_TTEST_SIZE(tlv_ip_reach))
1737 return (0);
1738
1739 prefix_len = mask2plen(EXTRACT_IPV4_TO_HOST_ORDER(tlv_ip_reach->mask));
1740
1741 if (prefix_len == -1)
1742 ND_PRINT("%sIPv4 prefix: %s mask %s",
1743 ident,
1744 ipaddr_string(ndo, (tlv_ip_reach->prefix)),
1745 ipaddr_string(ndo, (tlv_ip_reach->mask)));
1746 else
1747 ND_PRINT("%sIPv4 prefix: %15s/%u",
1748 ident,
1749 ipaddr_string(ndo, (tlv_ip_reach->prefix)),
1750 prefix_len);
1751
1752 ND_PRINT(", Distribution: %s, Metric: %u, %s",
1753 ISIS_LSP_TLV_METRIC_UPDOWN(tlv_ip_reach->isis_metric_block.metric_default) ? "down" : "up",
1754 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_default),
1755 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_default) ? "External" : "Internal");
1756
1757 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_delay))
1758 ND_PRINT("%s Delay Metric: %u, %s",
1759 ident,
1760 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_delay),
1761 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_delay) ? "External" : "Internal");
1762
1763 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_expense))
1764 ND_PRINT("%s Expense Metric: %u, %s",
1765 ident,
1766 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_expense),
1767 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_expense) ? "External" : "Internal");
1768
1769 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_error))
1770 ND_PRINT("%s Error Metric: %u, %s",
1771 ident,
1772 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_error),
1773 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_error) ? "External" : "Internal");
1774
1775 length -= sizeof(struct isis_tlv_ip_reach);
1776 tlv_ip_reach++;
1777 }
1778 return (1);
1779 }
1780
1781 /*
1782 * this is the common IP-REACH subTLV decoder it is called
1783 * from various EXTD-IP REACH TLVs (135,235,236,237)
1784 */
1785
1786 static int
1787 isis_print_ip_reach_subtlv(netdissect_options *ndo,
1788 const uint8_t *tptr, u_int subt, u_int subl,
1789 const char *ident)
1790 {
1791 /* first lets see if we know the subTLVs name*/
1792 ND_PRINT("%s%s subTLV #%u, length: %u",
1793 ident, tok2str(isis_ext_ip_reach_subtlv_values, "unknown", subt),
1794 subt, subl);
1795
1796 ND_TCHECK_LEN(tptr, subl);
1797
1798 switch(subt) {
1799 case ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR: /* fall through */
1800 case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32:
1801 while (subl >= 4) {
1802 ND_PRINT(", 0x%08x (=%u)",
1803 EXTRACT_BE_U_4(tptr),
1804 EXTRACT_BE_U_4(tptr));
1805 tptr+=4;
1806 subl-=4;
1807 }
1808 break;
1809 case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64:
1810 while (subl >= 8) {
1811 ND_PRINT(", 0x%08x%08x",
1812 EXTRACT_BE_U_4(tptr),
1813 EXTRACT_BE_U_4(tptr + 4));
1814 tptr+=8;
1815 subl-=8;
1816 }
1817 break;
1818 default:
1819 if (!print_unknown_data(ndo, tptr, "\n\t\t ", subl))
1820 return(0);
1821 break;
1822 }
1823 return(1);
1824
1825 trunc:
1826 nd_print_trunc(ndo);
1827 return(0);
1828 }
1829
1830 /*
1831 * this is the common IS-REACH decoder it is called
1832 * from various EXTD-IS REACH style TLVs (22,24,222)
1833 */
1834
1835 static int
1836 isis_print_ext_is_reach(netdissect_options *ndo,
1837 const uint8_t *tptr, const char *ident, u_int tlv_type,
1838 u_int tlv_remaining)
1839 {
1840 char ident_buffer[20];
1841 u_int subtlv_type,subtlv_len,subtlv_sum_len;
1842 int proc_bytes = 0; /* how many bytes did we process ? */
1843 u_int te_class,priority_level,gmpls_switch_cap;
1844 union { /* int to float conversion buffer for several subTLVs */
1845 float f;
1846 uint32_t i;
1847 } bw;
1848
1849 if (!ND_TTEST_LEN(tptr, NODE_ID_LEN))
1850 return(0);
1851 if (tlv_remaining < NODE_ID_LEN)
1852 return(0);
1853
1854 ND_PRINT("%sIS Neighbor: %s", ident, isis_print_id(tptr, NODE_ID_LEN));
1855 tptr+=NODE_ID_LEN;
1856 tlv_remaining-=NODE_ID_LEN;
1857
1858 if (tlv_type != ISIS_TLV_IS_ALIAS_ID) { /* the Alias TLV Metric field is implicit 0 */
1859 if (!ND_TTEST_3(tptr)) /* and is therefore skipped */
1860 return(0);
1861 if (tlv_remaining < 3)
1862 return(0);
1863 ND_PRINT(", Metric: %u", EXTRACT_BE_U_3(tptr));
1864 tptr+=3;
1865 tlv_remaining-=3;
1866 }
1867
1868 if (!ND_TTEST_1(tptr))
1869 return(0);
1870 if (tlv_remaining < 1)
1871 return(0);
1872 subtlv_sum_len=EXTRACT_U_1(tptr); /* read out subTLV length */
1873 tptr++;
1874 tlv_remaining--;
1875 proc_bytes=NODE_ID_LEN+3+1;
1876 ND_PRINT(", %ssub-TLVs present",subtlv_sum_len ? "" : "no ");
1877 if (subtlv_sum_len) {
1878 ND_PRINT(" (%u)", subtlv_sum_len);
1879 /* prepend the indent string */
1880 nd_snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident);
1881 ident = ident_buffer;
1882 while (subtlv_sum_len != 0) {
1883 if (!ND_TTEST_2(tptr))
1884 return(0);
1885 if (tlv_remaining < 2) {
1886 ND_PRINT("%sRemaining data in TLV shorter than a subTLV header",ident);
1887 proc_bytes += tlv_remaining;
1888 break;
1889 }
1890 if (subtlv_sum_len < 2) {
1891 ND_PRINT("%sRemaining data in subTLVs shorter than a subTLV header",ident);
1892 proc_bytes += subtlv_sum_len;
1893 break;
1894 }
1895 subtlv_type=EXTRACT_U_1(tptr);
1896 subtlv_len=EXTRACT_U_1(tptr + 1);
1897 tptr += 2;
1898 tlv_remaining -= 2;
1899 subtlv_sum_len -= 2;
1900 proc_bytes += 2;
1901 ND_PRINT("%s%s subTLV #%u, length: %u",
1902 ident, tok2str(isis_ext_is_reach_subtlv_values, "unknown", subtlv_type),
1903 subtlv_type, subtlv_len);
1904
1905 if (subtlv_sum_len < subtlv_len) {
1906 ND_PRINT(" (remaining data in subTLVs shorter than the current subTLV)");
1907 proc_bytes += subtlv_sum_len;
1908 break;
1909 }
1910
1911 if (tlv_remaining < subtlv_len) {
1912 ND_PRINT(" (> remaining tlv length)");
1913 proc_bytes += tlv_remaining;
1914 break;
1915 }
1916
1917 ND_TCHECK_LEN(tptr, subtlv_len);
1918
1919 switch(subtlv_type) {
1920 case ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP:
1921 case ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID:
1922 case ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID:
1923 if (subtlv_len >= 4) {
1924 ND_PRINT(", 0x%08x", EXTRACT_BE_U_4(tptr));
1925 if (subtlv_len == 8) /* rfc4205 */
1926 ND_PRINT(", 0x%08x", EXTRACT_BE_U_4(tptr + 4));
1927 }
1928 break;
1929 case ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR:
1930 case ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR:
1931 if (subtlv_len >= sizeof(nd_ipv4))
1932 ND_PRINT(", %s", ipaddr_string(ndo, tptr));
1933 break;
1934 case ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW :
1935 case ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW:
1936 if (subtlv_len >= 4) {
1937 bw.i = EXTRACT_BE_U_4(tptr);
1938 ND_PRINT(", %.3f Mbps", bw.f * 8 / 1000000);
1939 }
1940 break;
1941 case ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW :
1942 if (subtlv_len >= 32) {
1943 for (te_class = 0; te_class < 8; te_class++) {
1944 bw.i = EXTRACT_BE_U_4(tptr);
1945 ND_PRINT("%s TE-Class %u: %.3f Mbps",
1946 ident,
1947 te_class,
1948 bw.f * 8 / 1000000);
1949 tptr += 4;
1950 subtlv_len -= 4;
1951 subtlv_sum_len -= 4;
1952 proc_bytes += 4;
1953 }
1954 }
1955 break;
1956 case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS: /* fall through */
1957 case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD:
1958 if (subtlv_len == 0)
1959 break;
1960 ND_PRINT("%sBandwidth Constraints Model ID: %s (%u)",
1961 ident,
1962 tok2str(diffserv_te_bc_values, "unknown", EXTRACT_U_1(tptr)),
1963 EXTRACT_U_1(tptr));
1964 tptr++;
1965 subtlv_len--;
1966 subtlv_sum_len--;
1967 proc_bytes++;
1968 /* decode BCs until the subTLV ends */
1969 for (te_class = 0; subtlv_len != 0; te_class++) {
1970 if (subtlv_len < 4)
1971 break;
1972 bw.i = EXTRACT_BE_U_4(tptr);
1973 ND_PRINT("%s Bandwidth constraint CT%u: %.3f Mbps",
1974 ident,
1975 te_class,
1976 bw.f * 8 / 1000000);
1977 tptr += 4;
1978 subtlv_len -= 4;
1979 subtlv_sum_len -= 4;
1980 proc_bytes += 4;
1981 }
1982 break;
1983 case ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC:
1984 if (subtlv_len >= 3)
1985 ND_PRINT(", %u", EXTRACT_BE_U_3(tptr));
1986 break;
1987 case ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE:
1988 if (subtlv_len == 2) {
1989 ND_PRINT(", [ %s ] (0x%04x)",
1990 bittok2str(isis_subtlv_link_attribute_values,
1991 "Unknown",
1992 EXTRACT_BE_U_2(tptr)),
1993 EXTRACT_BE_U_2(tptr));
1994 }
1995 break;
1996 case ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE:
1997 if (subtlv_len >= 2) {
1998 ND_PRINT(", %s, Priority %u",
1999 bittok2str(gmpls_link_prot_values, "none", EXTRACT_U_1(tptr)),
2000 EXTRACT_U_1(tptr + 1));
2001 }
2002 break;
2003 case ISIS_SUBTLV_SPB_METRIC:
2004 if (subtlv_len >= 6) {
2005 ND_PRINT(", LM: %u", EXTRACT_BE_U_3(tptr));
2006 tptr += 3;
2007 subtlv_len -= 3;
2008 subtlv_sum_len -= 3;
2009 proc_bytes += 3;
2010 ND_PRINT(", P: %u", EXTRACT_U_1(tptr));
2011 tptr++;
2012 subtlv_len--;
2013 subtlv_sum_len--;
2014 proc_bytes++;
2015 ND_PRINT(", P-ID: %u", EXTRACT_BE_U_2(tptr));
2016 }
2017 break;
2018 case ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR:
2019 if (subtlv_len >= 36) {
2020 gmpls_switch_cap = EXTRACT_U_1(tptr);
2021 ND_PRINT("%s Interface Switching Capability:%s",
2022 ident,
2023 tok2str(gmpls_switch_cap_values, "Unknown", gmpls_switch_cap));
2024 ND_PRINT(", LSP Encoding: %s",
2025 tok2str(gmpls_encoding_values, "Unknown", EXTRACT_U_1((tptr + 1))));
2026 tptr += 4;
2027 subtlv_len -= 4;
2028 subtlv_sum_len -= 4;
2029 proc_bytes += 4;
2030 ND_PRINT("%s Max LSP Bandwidth:", ident);
2031 for (priority_level = 0; priority_level < 8; priority_level++) {
2032 bw.i = EXTRACT_BE_U_4(tptr);
2033 ND_PRINT("%s priority level %u: %.3f Mbps",
2034 ident,
2035 priority_level,
2036 bw.f * 8 / 1000000);
2037 tptr += 4;
2038 subtlv_len -= 4;
2039 subtlv_sum_len -= 4;
2040 proc_bytes += 4;
2041 }
2042 switch (gmpls_switch_cap) {
2043 case GMPLS_PSC1:
2044 case GMPLS_PSC2:
2045 case GMPLS_PSC3:
2046 case GMPLS_PSC4:
2047 if (subtlv_len < 6)
2048 break;
2049 bw.i = EXTRACT_BE_U_4(tptr);
2050 ND_PRINT("%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000);
2051 ND_PRINT("%s Interface MTU: %u", ident, EXTRACT_BE_U_2(tptr + 4));
2052 break;
2053 case GMPLS_TSC:
2054 if (subtlv_len < 8)
2055 break;
2056 bw.i = EXTRACT_BE_U_4(tptr);
2057 ND_PRINT("%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000);
2058 ND_PRINT("%s Indication %s", ident,
2059 tok2str(gmpls_switch_cap_tsc_indication_values, "Unknown (%u)", EXTRACT_U_1((tptr + 4))));
2060 break;
2061 default:
2062 /* there is some optional stuff left to decode but this is as of yet
2063 not specified so just lets hexdump what is left */
2064 if (subtlv_len != 0) {
2065 if (!print_unknown_data(ndo, tptr, "\n\t\t ", subtlv_len))
2066 return(0);
2067 }
2068 }
2069 }
2070 break;
2071 default:
2072 if (!print_unknown_data(ndo, tptr, "\n\t\t ", subtlv_len))
2073 return(0);
2074 break;
2075 }
2076
2077 tptr += subtlv_len;
2078 tlv_remaining -= subtlv_len;
2079 subtlv_sum_len -= subtlv_len;
2080 proc_bytes += subtlv_len;
2081 }
2082 }
2083 return(proc_bytes);
2084
2085 trunc:
2086 return(0);
2087 }
2088
2089 /*
2090 * this is the common Multi Topology ID decoder
2091 * it is called from various MT-TLVs (222,229,235,237)
2092 */
2093
2094 static int
2095 isis_print_mtid(netdissect_options *ndo,
2096 const uint8_t *tptr, const char *ident)
2097 {
2098 if (!ND_TTEST_2(tptr))
2099 return(0);
2100
2101 ND_PRINT("%s%s",
2102 ident,
2103 tok2str(isis_mt_values,
2104 "Reserved for IETF Consensus",
2105 ISIS_MASK_MTID(EXTRACT_BE_U_2(tptr))));
2106
2107 ND_PRINT(" Topology (0x%03x), Flags: [%s]",
2108 ISIS_MASK_MTID(EXTRACT_BE_U_2(tptr)),
2109 bittok2str(isis_mt_flag_values, "none",ISIS_MASK_MTFLAGS(EXTRACT_BE_U_2(tptr))));
2110
2111 return(2);
2112 }
2113
2114 /*
2115 * this is the common extended IP reach decoder
2116 * it is called from TLVs (135,235,236,237)
2117 * we process the TLV and optional subTLVs and return
2118 * the amount of processed bytes
2119 */
2120
2121 static int
2122 isis_print_extd_ip_reach(netdissect_options *ndo,
2123 const uint8_t *tptr, const char *ident, uint16_t afi)
2124 {
2125 char ident_buffer[20];
2126 uint8_t prefix[sizeof(nd_ipv6)]; /* shared copy buffer for IPv4 and IPv6 prefixes */
2127 u_int metric, status_byte, bit_length, byte_length, sublen, processed, subtlvtype, subtlvlen;
2128
2129 if (!ND_TTEST_4(tptr))
2130 return (0);
2131 metric = EXTRACT_BE_U_4(tptr);
2132 processed=4;
2133 tptr+=4;
2134
2135 if (afi == AF_INET) {
2136 if (!ND_TTEST_1(tptr)) /* fetch status byte */
2137 return (0);
2138 status_byte=EXTRACT_U_1(tptr);
2139 tptr++;
2140 bit_length = status_byte&0x3f;
2141 if (bit_length > 32) {
2142 ND_PRINT("%sIPv4 prefix: bad bit length %u",
2143 ident,
2144 bit_length);
2145 return (0);
2146 }
2147 processed++;
2148 } else if (afi == AF_INET6) {
2149 if (!ND_TTEST_2(tptr)) /* fetch status & prefix_len byte */
2150 return (0);
2151 status_byte=EXTRACT_U_1(tptr);
2152 bit_length=EXTRACT_U_1(tptr + 1);
2153 if (bit_length > 128) {
2154 ND_PRINT("%sIPv6 prefix: bad bit length %u",
2155 ident,
2156 bit_length);
2157 return (0);
2158 }
2159 tptr+=2;
2160 processed+=2;
2161 } else
2162 return (0); /* somebody is fooling us */
2163
2164 byte_length = (bit_length + 7) / 8; /* prefix has variable length encoding */
2165
2166 if (!ND_TTEST_LEN(tptr, byte_length))
2167 return (0);
2168 memset(prefix, 0, sizeof(prefix)); /* clear the copy buffer */
2169 memcpy(prefix,tptr,byte_length); /* copy as much as is stored in the TLV */
2170 tptr+=byte_length;
2171 processed+=byte_length;
2172
2173 if (afi == AF_INET)
2174 ND_PRINT("%sIPv4 prefix: %15s/%u",
2175 ident,
2176 ipaddr_string(ndo, prefix),
2177 bit_length);
2178 else if (afi == AF_INET6)
2179 ND_PRINT("%sIPv6 prefix: %s/%u",
2180 ident,
2181 ip6addr_string(ndo, prefix),
2182 bit_length);
2183
2184 ND_PRINT(", Distribution: %s, Metric: %u",
2185 ISIS_MASK_TLV_EXTD_IP_UPDOWN(status_byte) ? "down" : "up",
2186 metric);
2187
2188 if (afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte))
2189 ND_PRINT(", sub-TLVs present");
2190 else if (afi == AF_INET6)
2191 ND_PRINT(", %s%s",
2192 ISIS_MASK_TLV_EXTD_IP6_IE(status_byte) ? "External" : "Internal",
2193 ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte) ? ", sub-TLVs present" : "");
2194
2195 if ((afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte))
2196 || (afi == AF_INET6 && ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte))
2197 ) {
2198 /* assume that one prefix can hold more
2199 than one subTLV - therefore the first byte must reflect
2200 the aggregate bytecount of the subTLVs for this prefix
2201 */
2202 if (!ND_TTEST_1(tptr))
2203 return (0);
2204 sublen=EXTRACT_U_1(tptr);
2205 tptr++;
2206 processed+=sublen+1;
2207 ND_PRINT(" (%u)", sublen); /* print out subTLV length */
2208
2209 while (sublen>0) {
2210 if (!ND_TTEST_2(tptr))
2211 return (0);
2212 subtlvtype=EXTRACT_U_1(tptr);
2213 subtlvlen=EXTRACT_U_1(tptr + 1);
2214 tptr+=2;
2215 /* prepend the indent string */
2216 nd_snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident);
2217 if (!isis_print_ip_reach_subtlv(ndo, tptr, subtlvtype, subtlvlen, ident_buffer))
2218 return(0);
2219 tptr+=subtlvlen;
2220 sublen-=(subtlvlen+2);
2221 }
2222 }
2223 return (processed);
2224 }
2225
2226 /*
2227 * Clear checksum and lifetime prior to signature verification.
2228 */
2229 static void
2230 isis_clear_checksum_lifetime(void *header)
2231 {
2232 struct isis_lsp_header *header_lsp = (struct isis_lsp_header *) header;
2233
2234 header_lsp->checksum[0] = 0;
2235 header_lsp->checksum[1] = 0;
2236 header_lsp->remaining_lifetime[0] = 0;
2237 header_lsp->remaining_lifetime[1] = 0;
2238 }
2239
2240 /*
2241 * isis_print
2242 * Decode IS-IS packets. Return 0 on error.
2243 */
2244
2245 static int
2246 isis_print(netdissect_options *ndo,
2247 const uint8_t *p, u_int length)
2248 {
2249 const struct isis_common_header *isis_header;
2250
2251 const struct isis_iih_lan_header *header_iih_lan;
2252 const struct isis_iih_ptp_header *header_iih_ptp;
2253 const struct isis_lsp_header *header_lsp;
2254 const struct isis_csnp_header *header_csnp;
2255 const struct isis_psnp_header *header_psnp;
2256
2257 const struct isis_tlv_lsp *tlv_lsp;
2258 const struct isis_tlv_ptp_adj *tlv_ptp_adj;
2259 const struct isis_tlv_is_reach *tlv_is_reach;
2260 const struct isis_tlv_es_reach *tlv_es_reach;
2261
2262 uint8_t version, pdu_version, fixed_len;
2263 uint8_t pdu_type, pdu_max_area, max_area, pdu_id_length, id_length, tlv_type, tlv_len, tmp, alen, lan_alen, prefix_len;
2264 uint8_t ext_is_len, ext_ip_len, mt_len;
2265 uint8_t isis_subtlv_idrp;
2266 const uint8_t *optr, *pptr, *tptr;
2267 u_short packet_len,pdu_len, key_id;
2268 u_int i,vendor_id;
2269 int sigcheck;
2270
2271 ndo->ndo_protocol = "isis";
2272 packet_len=length;
2273 optr = p; /* initialize the _o_riginal pointer to the packet start -
2274 need it for parsing the checksum TLV and authentication
2275 TLV verification */
2276 isis_header = (const struct isis_common_header *)p;
2277 ND_TCHECK_SIZE(isis_header);
2278 if (length < ISIS_COMMON_HEADER_SIZE)
2279 goto trunc;
2280 pptr = p+(ISIS_COMMON_HEADER_SIZE);
2281 header_iih_lan = (const struct isis_iih_lan_header *)pptr;
2282 header_iih_ptp = (const struct isis_iih_ptp_header *)pptr;
2283 header_lsp = (const struct isis_lsp_header *)pptr;
2284 header_csnp = (const struct isis_csnp_header *)pptr;
2285 header_psnp = (const struct isis_psnp_header *)pptr;
2286
2287 if (!ndo->ndo_eflag)
2288 ND_PRINT("IS-IS");
2289
2290 /*
2291 * Sanity checking of the header.
2292 */
2293
2294 version = EXTRACT_U_1(isis_header->version);
2295 if (version != ISIS_VERSION) {
2296 ND_PRINT("version %u packet not supported", version);
2297 return (0);
2298 }
2299
2300 pdu_id_length = EXTRACT_U_1(isis_header->id_length);
2301 if ((pdu_id_length != SYSTEM_ID_LEN) && (pdu_id_length != 0)) {
2302 ND_PRINT("system ID length of %u is not supported",
2303 pdu_id_length);
2304 return (0);
2305 }
2306
2307 pdu_version = EXTRACT_U_1(isis_header->pdu_version);
2308 if (pdu_version != ISIS_VERSION) {
2309 ND_PRINT("version %u packet not supported", pdu_version);
2310 return (0);
2311 }
2312
2313 fixed_len = EXTRACT_U_1(isis_header->fixed_len);
2314 if (length < fixed_len) {
2315 ND_PRINT("fixed header length %u > packet length %u", fixed_len, length);
2316 return (0);
2317 }
2318
2319 if (fixed_len < ISIS_COMMON_HEADER_SIZE) {
2320 ND_PRINT("fixed header length %u < minimum header size %u", fixed_len, (u_int)ISIS_COMMON_HEADER_SIZE);
2321 return (0);
2322 }
2323
2324 pdu_max_area = EXTRACT_U_1(isis_header->max_area);
2325 switch(pdu_max_area) {
2326 case 0:
2327 max_area = 3; /* silly shit */
2328 break;
2329 case 255:
2330 ND_PRINT("bad packet -- 255 areas");
2331 return (0);
2332 default:
2333 max_area = pdu_max_area;
2334 break;
2335 }
2336
2337 switch(pdu_id_length) {
2338 case 0:
2339 id_length = 6; /* silly shit again */
2340 break;
2341 case 1: /* 1-8 are valid sys-ID lenghts */
2342 case 2:
2343 case 3:
2344 case 4:
2345 case 5:
2346 case 6:
2347 case 7:
2348 case 8:
2349 id_length = pdu_id_length;
2350 break;
2351 case 255:
2352 id_length = 0; /* entirely useless */
2353 break;
2354 default:
2355 id_length = pdu_id_length;
2356 break;
2357 }
2358
2359 /* toss any non 6-byte sys-ID len PDUs */
2360 if (id_length != 6 ) {
2361 ND_PRINT("bad packet -- illegal sys-ID length (%u)", id_length);
2362 return (0);
2363 }
2364
2365 pdu_type = EXTRACT_U_1(isis_header->pdu_type);
2366
2367 /* in non-verbose mode print the basic PDU Type plus PDU specific brief information*/
2368 if (ndo->ndo_vflag == 0) {
2369 ND_PRINT("%s%s",
2370 ndo->ndo_eflag ? "" : ", ",
2371 tok2str(isis_pdu_values, "unknown PDU-Type %u", pdu_type));
2372 } else {
2373 /* ok they seem to want to know everything - lets fully decode it */
2374 ND_PRINT("%slength %u", ndo->ndo_eflag ? "" : ", ", length);
2375
2376 ND_PRINT("\n\t%s, hlen: %u, v: %u, pdu-v: %u, sys-id-len: %u (%u), max-area: %u (%u)",
2377 tok2str(isis_pdu_values,
2378 "unknown, type %u",
2379 pdu_type),
2380 fixed_len,
2381 version,
2382 pdu_version,
2383 id_length,
2384 pdu_id_length,
2385 max_area,
2386 pdu_max_area);
2387
2388 if (ndo->ndo_vflag > 1) {
2389 if (!print_unknown_data(ndo, optr, "\n\t", 8)) /* provide the _o_riginal pointer */
2390 return (0); /* for optionally debugging the common header */
2391 }
2392 }
2393
2394 switch (pdu_type) {
2395
2396 case ISIS_PDU_L1_LAN_IIH:
2397 case ISIS_PDU_L2_LAN_IIH:
2398 if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) {
2399 ND_PRINT(", bogus fixed header length %u should be %lu",
2400 fixed_len, (unsigned long)(ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE));
2401 return (0);
2402 }
2403 ND_TCHECK_SIZE(header_iih_lan);
2404 if (length < ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)
2405 goto trunc;
2406 if (ndo->ndo_vflag == 0) {
2407 ND_PRINT(", src-id %s",
2408 isis_print_id(header_iih_lan->source_id, SYSTEM_ID_LEN));
2409 ND_PRINT(", lan-id %s, prio %u",
2410 isis_print_id(header_iih_lan->lan_id,NODE_ID_LEN),
2411 EXTRACT_U_1(header_iih_lan->priority));
2412 ND_PRINT(", length %u", length);
2413 return (1);
2414 }
2415 pdu_len=EXTRACT_BE_U_2(header_iih_lan->pdu_len);
2416 if (packet_len>pdu_len) {
2417 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2418 length=pdu_len;
2419 }
2420
2421 ND_PRINT("\n\t source-id: %s, holding time: %us, Flags: [%s]",
2422 isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN),
2423 EXTRACT_BE_U_2(header_iih_lan->holding_time),
2424 tok2str(isis_iih_circuit_type_values,
2425 "unknown circuit type 0x%02x",
2426 EXTRACT_U_1(header_iih_lan->circuit_type)));
2427
2428 ND_PRINT("\n\t lan-id: %s, Priority: %u, PDU length: %u",
2429 isis_print_id(header_iih_lan->lan_id, NODE_ID_LEN),
2430 EXTRACT_U_1(header_iih_lan->priority) & ISIS_LAN_PRIORITY_MASK,
2431 pdu_len);
2432
2433 if (ndo->ndo_vflag > 1) {
2434 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_IIH_LAN_HEADER_SIZE))
2435 return (0);
2436 }
2437
2438 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
2439 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
2440 break;
2441
2442 case ISIS_PDU_PTP_IIH:
2443 if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) {
2444 ND_PRINT(", bogus fixed header length %u should be %lu",
2445 fixed_len, (unsigned long)(ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE));
2446 return (0);
2447 }
2448 ND_TCHECK_SIZE(header_iih_ptp);
2449 if (length < ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)
2450 goto trunc;
2451 if (ndo->ndo_vflag == 0) {
2452 ND_PRINT(", src-id %s", isis_print_id(header_iih_ptp->source_id, SYSTEM_ID_LEN));
2453 ND_PRINT(", length %u", length);
2454 return (1);
2455 }
2456 pdu_len=EXTRACT_BE_U_2(header_iih_ptp->pdu_len);
2457 if (packet_len>pdu_len) {
2458 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2459 length=pdu_len;
2460 }
2461
2462 ND_PRINT("\n\t source-id: %s, holding time: %us, Flags: [%s]",
2463 isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN),
2464 EXTRACT_BE_U_2(header_iih_ptp->holding_time),
2465 tok2str(isis_iih_circuit_type_values,
2466 "unknown circuit type 0x%02x",
2467 EXTRACT_U_1(header_iih_ptp->circuit_type)));
2468
2469 ND_PRINT("\n\t circuit-id: 0x%02x, PDU length: %u",
2470 EXTRACT_U_1(header_iih_ptp->circuit_id),
2471 pdu_len);
2472
2473 if (ndo->ndo_vflag > 1) {
2474 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_IIH_PTP_HEADER_SIZE))
2475 return (0);
2476 }
2477
2478 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
2479 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
2480 break;
2481
2482 case ISIS_PDU_L1_LSP:
2483 case ISIS_PDU_L2_LSP:
2484 if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) {
2485 ND_PRINT(", bogus fixed header length %u should be %lu",
2486 fixed_len, (unsigned long)ISIS_LSP_HEADER_SIZE);
2487 return (0);
2488 }
2489 ND_TCHECK_SIZE(header_lsp);
2490 if (length < ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)
2491 goto trunc;
2492 if (ndo->ndo_vflag == 0) {
2493 ND_PRINT(", lsp-id %s, seq 0x%08x, lifetime %5us",
2494 isis_print_id(header_lsp->lsp_id, LSP_ID_LEN),
2495 EXTRACT_BE_U_4(header_lsp->sequence_number),
2496 EXTRACT_BE_U_2(header_lsp->remaining_lifetime));
2497 ND_PRINT(", length %u", length);
2498 return (1);
2499 }
2500 pdu_len=EXTRACT_BE_U_2(header_lsp->pdu_len);
2501 if (packet_len>pdu_len) {
2502 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2503 length=pdu_len;
2504 }
2505
2506 ND_PRINT("\n\t lsp-id: %s, seq: 0x%08x, lifetime: %5us\n\t chksum: 0x%04x",
2507 isis_print_id(header_lsp->lsp_id, LSP_ID_LEN),
2508 EXTRACT_BE_U_4(header_lsp->sequence_number),
2509 EXTRACT_BE_U_2(header_lsp->remaining_lifetime),
2510 EXTRACT_BE_U_2(header_lsp->checksum));
2511
2512 osi_print_cksum(ndo, (const uint8_t *)header_lsp->lsp_id,
2513 EXTRACT_BE_U_2(header_lsp->checksum),
2514 12, length-12);
2515
2516 ND_PRINT(", PDU length: %u, Flags: [ %s",
2517 pdu_len,
2518 ISIS_MASK_LSP_OL_BIT(header_lsp->typeblock) ? "Overload bit set, " : "");
2519
2520 if (ISIS_MASK_LSP_ATT_BITS(header_lsp->typeblock)) {
2521 ND_PRINT("%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : "");
2522 ND_PRINT("%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : "");
2523 ND_PRINT("%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : "");
2524 ND_PRINT("%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : "");
2525 ND_PRINT("ATT bit set, ");
2526 }
2527 ND_PRINT("%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : "");
2528 ND_PRINT("%s ]", tok2str(isis_lsp_istype_values, "Unknown(0x%x)",
2529 ISIS_MASK_LSP_ISTYPE_BITS(header_lsp->typeblock)));
2530
2531 if (ndo->ndo_vflag > 1) {
2532 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_LSP_HEADER_SIZE))
2533 return (0);
2534 }
2535
2536 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
2537 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
2538 break;
2539
2540 case ISIS_PDU_L1_CSNP:
2541 case ISIS_PDU_L2_CSNP:
2542 if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) {
2543 ND_PRINT(", bogus fixed header length %u should be %lu",
2544 fixed_len, (unsigned long)(ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE));
2545 return (0);
2546 }
2547 ND_TCHECK_SIZE(header_csnp);
2548 if (length < ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)
2549 goto trunc;
2550 if (ndo->ndo_vflag == 0) {
2551 ND_PRINT(", src-id %s", isis_print_id(header_csnp->source_id, NODE_ID_LEN));
2552 ND_PRINT(", length %u", length);
2553 return (1);
2554 }
2555 pdu_len=EXTRACT_BE_U_2(header_csnp->pdu_len);
2556 if (packet_len>pdu_len) {
2557 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2558 length=pdu_len;
2559 }
2560
2561 ND_PRINT("\n\t source-id: %s, PDU length: %u",
2562 isis_print_id(header_csnp->source_id, NODE_ID_LEN),
2563 pdu_len);
2564 ND_PRINT("\n\t start lsp-id: %s",
2565 isis_print_id(header_csnp->start_lsp_id, LSP_ID_LEN));
2566 ND_PRINT("\n\t end lsp-id: %s",
2567 isis_print_id(header_csnp->end_lsp_id, LSP_ID_LEN));
2568
2569 if (ndo->ndo_vflag > 1) {
2570 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_CSNP_HEADER_SIZE))
2571 return (0);
2572 }
2573
2574 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
2575 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
2576 break;
2577
2578 case ISIS_PDU_L1_PSNP:
2579 case ISIS_PDU_L2_PSNP:
2580 if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) {
2581 ND_PRINT("- bogus fixed header length %u should be %lu",
2582 fixed_len, (unsigned long)(ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE));
2583 return (0);
2584 }
2585 ND_TCHECK_SIZE(header_psnp);
2586 if (length < ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)
2587 goto trunc;
2588 if (ndo->ndo_vflag == 0) {
2589 ND_PRINT(", src-id %s", isis_print_id(header_psnp->source_id, NODE_ID_LEN));
2590 ND_PRINT(", length %u", length);
2591 return (1);
2592 }
2593 pdu_len=EXTRACT_BE_U_2(header_psnp->pdu_len);
2594 if (packet_len>pdu_len) {
2595 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2596 length=pdu_len;
2597 }
2598
2599 ND_PRINT("\n\t source-id: %s, PDU length: %u",
2600 isis_print_id(header_psnp->source_id, NODE_ID_LEN),
2601 pdu_len);
2602
2603 if (ndo->ndo_vflag > 1) {
2604 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_PSNP_HEADER_SIZE))
2605 return (0);
2606 }
2607
2608 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
2609 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
2610 break;
2611
2612 default:
2613 if (ndo->ndo_vflag == 0) {
2614 ND_PRINT(", length %u", length);
2615 return (1);
2616 }
2617 (void)print_unknown_data(ndo, pptr, "\n\t ", length);
2618 return (0);
2619 }
2620
2621 /*
2622 * Now print the TLV's.
2623 */
2624
2625 while (packet_len > 0) {
2626 ND_TCHECK_2(pptr);
2627 if (packet_len < 2)
2628 goto trunc;
2629 tlv_type = EXTRACT_U_1(pptr);
2630 tlv_len = EXTRACT_U_1(pptr + 1);
2631 pptr += 2;
2632 packet_len -= 2;
2633 tmp =tlv_len; /* copy temporary len & pointer to packet data */
2634 tptr = pptr;
2635
2636 /* first lets see if we know the TLVs name*/
2637 ND_PRINT("\n\t %s TLV #%u, length: %u",
2638 tok2str(isis_tlv_values,
2639 "unknown",
2640 tlv_type),
2641 tlv_type,
2642 tlv_len);
2643
2644 if (tlv_len == 0) /* something is invalid */
2645 continue;
2646
2647 if (packet_len < tlv_len)
2648 goto trunc;
2649
2650 /* now check if we have a decoder otherwise do a hexdump at the end*/
2651 switch (tlv_type) {
2652 case ISIS_TLV_AREA_ADDR:
2653 ND_TCHECK_1(tptr);
2654 alen = EXTRACT_U_1(tptr);
2655 tptr++;
2656 while (tmp && alen < tmp) {
2657 ND_TCHECK_LEN(tptr, alen);
2658 ND_PRINT("\n\t Area address (length: %u): %s",
2659 alen,
2660 isonsap_string(ndo, tptr, alen));
2661 tptr += alen;
2662 tmp -= alen + 1;
2663 if (tmp==0) /* if this is the last area address do not attemt a boundary check */
2664 break;
2665 ND_TCHECK_1(tptr);
2666 alen = EXTRACT_U_1(tptr);
2667 tptr++;
2668 }
2669 break;
2670 case ISIS_TLV_ISNEIGH:
2671 while (tmp >= MAC_ADDR_LEN) {
2672 ND_TCHECK_LEN(tptr, MAC_ADDR_LEN);
2673 ND_PRINT("\n\t SNPA: %s", isis_print_id(tptr, MAC_ADDR_LEN));
2674 tmp -= MAC_ADDR_LEN;
2675 tptr += MAC_ADDR_LEN;
2676 }
2677 break;
2678
2679 case ISIS_TLV_ISNEIGH_VARLEN:
2680 if (!ND_TTEST_1(tptr) || tmp < 3) /* min. TLV length */
2681 goto trunc;
2682 lan_alen = EXTRACT_U_1(tptr); /* LAN address length */
2683 tptr++;
2684 if (lan_alen == 0) {
2685 ND_PRINT("\n\t LAN address length 0 bytes (invalid)");
2686 break;
2687 }
2688 tmp --;
2689 ND_PRINT("\n\t LAN address length %u bytes ", lan_alen);
2690 while (tmp >= lan_alen) {
2691 ND_TCHECK_LEN(tptr, lan_alen);
2692 ND_PRINT("\n\t\tIS Neighbor: %s", isis_print_id(tptr, lan_alen));
2693 tmp -= lan_alen;
2694 tptr +=lan_alen;
2695 }
2696 break;
2697
2698 case ISIS_TLV_PADDING:
2699 break;
2700
2701 case ISIS_TLV_MT_IS_REACH:
2702 mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
2703 if (mt_len == 0) /* did something go wrong ? */
2704 goto trunc;
2705 tptr+=mt_len;
2706 tmp-=mt_len;
2707 while (tmp >= 2+NODE_ID_LEN+3+1) {
2708 ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type, tmp);
2709 if (ext_is_len == 0) /* did something go wrong ? */
2710 goto trunc;
2711
2712 tmp-=ext_is_len;
2713 tptr+=ext_is_len;
2714 }
2715 break;
2716
2717 case ISIS_TLV_IS_ALIAS_ID:
2718 while (tmp >= NODE_ID_LEN+1) { /* is it worth attempting a decode ? */
2719 ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type, tmp);
2720 if (ext_is_len == 0) /* did something go wrong ? */
2721 goto trunc;
2722 tmp-=ext_is_len;
2723 tptr+=ext_is_len;
2724 }
2725 break;
2726
2727 case ISIS_TLV_EXT_IS_REACH:
2728 while (tmp >= NODE_ID_LEN+3+1) { /* is it worth attempting a decode ? */
2729 ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type, tmp);
2730 if (ext_is_len == 0) /* did something go wrong ? */
2731 goto trunc;
2732 tmp-=ext_is_len;
2733 tptr+=ext_is_len;
2734 }
2735 break;
2736 case ISIS_TLV_IS_REACH:
2737 ND_TCHECK_1(tptr); /* check if there is one byte left to read out the virtual flag */
2738 ND_PRINT("\n\t %s",
2739 tok2str(isis_is_reach_virtual_values,
2740 "bogus virtual flag 0x%02x",
2741 EXTRACT_U_1(tptr)));
2742 tptr++;
2743 tlv_is_reach = (const struct isis_tlv_is_reach *)tptr;
2744 while (tmp >= sizeof(struct isis_tlv_is_reach)) {
2745 ND_TCHECK_SIZE(tlv_is_reach);
2746 ND_PRINT("\n\t IS Neighbor: %s",
2747 isis_print_id(tlv_is_reach->neighbor_nodeid, NODE_ID_LEN));
2748 isis_print_metric_block(ndo, &tlv_is_reach->isis_metric_block);
2749 tmp -= sizeof(struct isis_tlv_is_reach);
2750 tlv_is_reach++;
2751 }
2752 break;
2753
2754 case ISIS_TLV_ESNEIGH:
2755 tlv_es_reach = (const struct isis_tlv_es_reach *)tptr;
2756 while (tmp >= sizeof(struct isis_tlv_es_reach)) {
2757 ND_TCHECK_SIZE(tlv_es_reach);
2758 ND_PRINT("\n\t ES Neighbor: %s",
2759 isis_print_id(tlv_es_reach->neighbor_sysid, SYSTEM_ID_LEN));
2760 isis_print_metric_block(ndo, &tlv_es_reach->isis_metric_block);
2761 tmp -= sizeof(struct isis_tlv_es_reach);
2762 tlv_es_reach++;
2763 }
2764 break;
2765
2766 /* those two TLVs share the same format */
2767 case ISIS_TLV_INT_IP_REACH:
2768 case ISIS_TLV_EXT_IP_REACH:
2769 if (!isis_print_tlv_ip_reach(ndo, pptr, "\n\t ", tlv_len))
2770 return (1);
2771 break;
2772
2773 case ISIS_TLV_EXTD_IP_REACH:
2774 while (tmp>0) {
2775 ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET);
2776 if (ext_ip_len == 0) /* did something go wrong ? */
2777 goto trunc;
2778 tptr+=ext_ip_len;
2779 tmp-=ext_ip_len;
2780 }
2781 break;
2782
2783 case ISIS_TLV_MT_IP_REACH:
2784 mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
2785 if (mt_len == 0) { /* did something go wrong ? */
2786 goto trunc;
2787 }
2788 tptr+=mt_len;
2789 tmp-=mt_len;
2790
2791 while (tmp>0) {
2792 ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET);
2793 if (ext_ip_len == 0) /* did something go wrong ? */
2794 goto trunc;
2795 tptr+=ext_ip_len;
2796 tmp-=ext_ip_len;
2797 }
2798 break;
2799
2800 case ISIS_TLV_IP6_REACH:
2801 while (tmp>0) {
2802 ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET6);
2803 if (ext_ip_len == 0) /* did something go wrong ? */
2804 goto trunc;
2805 tptr+=ext_ip_len;
2806 tmp-=ext_ip_len;
2807 }
2808 break;
2809
2810 case ISIS_TLV_MT_IP6_REACH:
2811 mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
2812 if (mt_len == 0) { /* did something go wrong ? */
2813 goto trunc;
2814 }
2815 tptr+=mt_len;
2816 tmp-=mt_len;
2817
2818 while (tmp>0) {
2819 ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET6);
2820 if (ext_ip_len == 0) /* did something go wrong ? */
2821 goto trunc;
2822 tptr+=ext_ip_len;
2823 tmp-=ext_ip_len;
2824 }
2825 break;
2826
2827 case ISIS_TLV_IP6ADDR:
2828 while (tmp>=sizeof(nd_ipv6)) {
2829 ND_TCHECK_LEN(tptr, sizeof(nd_ipv6));
2830
2831 ND_PRINT("\n\t IPv6 interface address: %s",
2832 ip6addr_string(ndo, tptr));
2833
2834 tptr += sizeof(nd_ipv6);
2835 tmp -= sizeof(nd_ipv6);
2836 }
2837 break;
2838 case ISIS_TLV_AUTH:
2839 ND_TCHECK_1(tptr);
2840
2841 ND_PRINT("\n\t %s: ",
2842 tok2str(isis_subtlv_auth_values,
2843 "unknown Authentication type 0x%02x",
2844 EXTRACT_U_1(tptr)));
2845
2846 switch (EXTRACT_U_1(tptr)) {
2847 case ISIS_SUBTLV_AUTH_SIMPLE:
2848 if (nd_printzp(ndo, tptr + 1, tlv_len - 1, ndo->ndo_snapend))
2849 goto trunc;
2850 break;
2851 case ISIS_SUBTLV_AUTH_MD5:
2852 for(i=1;i<tlv_len;i++) {
2853 ND_TCHECK_1(tptr + i);
2854 ND_PRINT("%02x", EXTRACT_U_1(tptr + i));
2855 }
2856 if (tlv_len != ISIS_SUBTLV_AUTH_MD5_LEN+1)
2857 ND_PRINT(", (invalid subTLV) ");
2858
2859 sigcheck = signature_verify(ndo, optr, length, tptr + 1,
2860 isis_clear_checksum_lifetime,
2861 header_lsp);
2862 ND_PRINT(" (%s)", tok2str(signature_check_values, "Unknown", sigcheck));
2863
2864 break;
2865 case ISIS_SUBTLV_AUTH_GENERIC:
2866 ND_TCHECK_2(tptr + 1);
2867 key_id = EXTRACT_BE_U_2(tptr + 1);
2868 ND_PRINT("%u, password: ", key_id);
2869 for(i=1 + sizeof(uint16_t);i<tlv_len;i++) {
2870 ND_TCHECK_1(tptr + i);
2871 ND_PRINT("%02x", EXTRACT_U_1(tptr + i));
2872 }
2873 break;
2874 case ISIS_SUBTLV_AUTH_PRIVATE:
2875 default:
2876 if (!print_unknown_data(ndo, tptr + 1, "\n\t\t ", tlv_len - 1))
2877 return(0);
2878 break;
2879 }
2880 break;
2881
2882 case ISIS_TLV_PTP_ADJ:
2883 tlv_ptp_adj = (const struct isis_tlv_ptp_adj *)tptr;
2884 if(tmp>=1) {
2885 ND_TCHECK_1(tptr);
2886 ND_PRINT("\n\t Adjacency State: %s (%u)",
2887 tok2str(isis_ptp_adjancey_values, "unknown", EXTRACT_U_1(tptr)),
2888 EXTRACT_U_1(tptr));
2889 tmp--;
2890 }
2891 if(tmp>sizeof(tlv_ptp_adj->extd_local_circuit_id)) {
2892 ND_TCHECK_4(tlv_ptp_adj->extd_local_circuit_id);
2893 ND_PRINT("\n\t Extended Local circuit-ID: 0x%08x",
2894 EXTRACT_BE_U_4(tlv_ptp_adj->extd_local_circuit_id));
2895 tmp-=sizeof(tlv_ptp_adj->extd_local_circuit_id);
2896 }
2897 if(tmp>=SYSTEM_ID_LEN) {
2898 ND_TCHECK_LEN(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN);
2899 ND_PRINT("\n\t Neighbor System-ID: %s",
2900 isis_print_id(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN));
2901 tmp-=SYSTEM_ID_LEN;
2902 }
2903 if(tmp>=sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)) {
2904 ND_TCHECK_4(tlv_ptp_adj->neighbor_extd_local_circuit_id);
2905 ND_PRINT("\n\t Neighbor Extended Local circuit-ID: 0x%08x",
2906 EXTRACT_BE_U_4(tlv_ptp_adj->neighbor_extd_local_circuit_id));
2907 }
2908 break;
2909
2910 case ISIS_TLV_PROTOCOLS:
2911 ND_PRINT("\n\t NLPID(s): ");
2912 while (tmp>0) {
2913 ND_TCHECK_1(tptr);
2914 ND_PRINT("%s (0x%02x)",
2915 tok2str(nlpid_values,
2916 "unknown",
2917 EXTRACT_U_1(tptr)),
2918 EXTRACT_U_1(tptr));
2919 if (tmp>1) /* further NPLIDs ? - put comma */
2920 ND_PRINT(", ");
2921 tptr++;
2922 tmp--;
2923 }
2924 break;
2925
2926 case ISIS_TLV_MT_PORT_CAP:
2927 {
2928 ND_TCHECK_2(tptr);
2929
2930 ND_PRINT("\n\t RES: %u, MTID(s): %u",
2931 (EXTRACT_BE_U_2(tptr) >> 12),
2932 (EXTRACT_BE_U_2(tptr) & 0x0fff));
2933
2934 tmp = tmp-2;
2935 tptr = tptr+2;
2936
2937 if (tmp)
2938 isis_print_mt_port_cap_subtlv(ndo, tptr, tmp);
2939
2940 break;
2941 }
2942
2943 case ISIS_TLV_MT_CAPABILITY:
2944
2945 ND_TCHECK_2(tptr);
2946
2947 ND_PRINT("\n\t O: %u, RES: %u, MTID(s): %u",
2948 (EXTRACT_BE_U_2(tptr) >> 15) & 0x01,
2949 (EXTRACT_BE_U_2(tptr) >> 12) & 0x07,
2950 EXTRACT_BE_U_2(tptr) & 0x0fff);
2951
2952 tmp = tmp-2;
2953 tptr = tptr+2;
2954
2955 if (tmp)
2956 isis_print_mt_capability_subtlv(ndo, tptr, tmp);
2957
2958 break;
2959
2960 case ISIS_TLV_TE_ROUTER_ID:
2961 ND_TCHECK_LEN(pptr, sizeof(nd_ipv4));
2962 ND_PRINT("\n\t Traffic Engineering Router ID: %s", ipaddr_string(ndo, pptr));
2963 break;
2964
2965 case ISIS_TLV_IPADDR:
2966 while (tmp>=sizeof(nd_ipv4)) {
2967 ND_TCHECK_LEN(tptr, sizeof(nd_ipv4));
2968 ND_PRINT("\n\t IPv4 interface address: %s", ipaddr_string(ndo, tptr));
2969 tptr += sizeof(nd_ipv4);
2970 tmp -= sizeof(nd_ipv4);
2971 }
2972 break;
2973
2974 case ISIS_TLV_HOSTNAME:
2975 ND_PRINT("\n\t Hostname: ");
2976 if (nd_printzp(ndo, tptr, tmp, ndo->ndo_snapend))
2977 goto trunc;
2978 break;
2979
2980 case ISIS_TLV_SHARED_RISK_GROUP:
2981 if (tmp < NODE_ID_LEN)
2982 break;
2983 ND_TCHECK_LEN(tptr, NODE_ID_LEN);
2984 ND_PRINT("\n\t IS Neighbor: %s", isis_print_id(tptr, NODE_ID_LEN));
2985 tptr+=NODE_ID_LEN;
2986 tmp-=NODE_ID_LEN;
2987
2988 if (tmp < 1)
2989 break;
2990 ND_TCHECK_1(tptr);
2991 ND_PRINT(", Flags: [%s]", ISIS_MASK_TLV_SHARED_RISK_GROUP(EXTRACT_U_1(tptr)) ? "numbered" : "unnumbered");
2992 tptr++;
2993 tmp--;
2994
2995 if (tmp < sizeof(nd_ipv4))
2996 break;
2997 ND_TCHECK_LEN(tptr, sizeof(nd_ipv4));
2998 ND_PRINT("\n\t IPv4 interface address: %s", ipaddr_string(ndo, tptr));
2999 tptr+=sizeof(nd_ipv4);
3000 tmp-=sizeof(nd_ipv4);
3001
3002 if (tmp < sizeof(nd_ipv4))
3003 break;
3004 ND_TCHECK_LEN(tptr, sizeof(nd_ipv4));
3005 ND_PRINT("\n\t IPv4 neighbor address: %s", ipaddr_string(ndo, tptr));
3006 tptr+=sizeof(nd_ipv4);
3007 tmp-=sizeof(nd_ipv4);
3008
3009 while (tmp>=4) {
3010 ND_TCHECK_4(tptr);
3011 ND_PRINT("\n\t Link-ID: 0x%08x", EXTRACT_BE_U_4(tptr));
3012 tptr+=4;
3013 tmp-=4;
3014 }
3015 break;
3016
3017 case ISIS_TLV_LSP:
3018 tlv_lsp = (const struct isis_tlv_lsp *)tptr;
3019 while(tmp>=sizeof(struct isis_tlv_lsp)) {
3020 ND_TCHECK_1(tlv_lsp->lsp_id + LSP_ID_LEN - 1);
3021 ND_PRINT("\n\t lsp-id: %s",
3022 isis_print_id(tlv_lsp->lsp_id, LSP_ID_LEN));
3023 ND_TCHECK_4(tlv_lsp->sequence_number);
3024 ND_PRINT(", seq: 0x%08x", EXTRACT_BE_U_4(tlv_lsp->sequence_number));
3025 ND_TCHECK_2(tlv_lsp->remaining_lifetime);
3026 ND_PRINT(", lifetime: %5ds", EXTRACT_BE_U_2(tlv_lsp->remaining_lifetime));
3027 ND_TCHECK_2(tlv_lsp->checksum);
3028 ND_PRINT(", chksum: 0x%04x", EXTRACT_BE_U_2(tlv_lsp->checksum));
3029 tmp-=sizeof(struct isis_tlv_lsp);
3030 tlv_lsp++;
3031 }
3032 break;
3033
3034 case ISIS_TLV_CHECKSUM:
3035 if (tmp < ISIS_TLV_CHECKSUM_MINLEN)
3036 break;
3037 ND_TCHECK_LEN(tptr, ISIS_TLV_CHECKSUM_MINLEN);
3038 ND_PRINT("\n\t checksum: 0x%04x ", EXTRACT_BE_U_2(tptr));
3039 /* do not attempt to verify the checksum if it is zero
3040 * most likely a HMAC-MD5 TLV is also present and
3041 * to avoid conflicts the checksum TLV is zeroed.
3042 * see rfc3358 for details
3043 */
3044 osi_print_cksum(ndo, optr, EXTRACT_BE_U_2(tptr), tptr-optr,
3045 length);
3046 break;
3047
3048 case ISIS_TLV_POI:
3049 if (tlv_len >= SYSTEM_ID_LEN + 1) {
3050 ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN + 1);
3051 ND_PRINT("\n\t Purge Originator System-ID: %s",
3052 isis_print_id(tptr + 1, SYSTEM_ID_LEN));
3053 }
3054
3055 if (tlv_len == 2 * SYSTEM_ID_LEN + 1) {
3056 ND_TCHECK_LEN(tptr, 2 * SYSTEM_ID_LEN + 1);
3057 ND_PRINT("\n\t Received from System-ID: %s",
3058 isis_print_id(tptr + SYSTEM_ID_LEN + 1, SYSTEM_ID_LEN));
3059 }
3060 break;
3061
3062 case ISIS_TLV_MT_SUPPORTED:
3063 if (tmp < ISIS_TLV_MT_SUPPORTED_MINLEN)
3064 break;
3065 while (tmp>1) {
3066 /* length can only be a multiple of 2, otherwise there is
3067 something broken -> so decode down until length is 1 */
3068 if (tmp!=1) {
3069 mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
3070 if (mt_len == 0) /* did something go wrong ? */
3071 goto trunc;
3072 tptr+=mt_len;
3073 tmp-=mt_len;
3074 } else {
3075 ND_PRINT("\n\t invalid MT-ID");
3076 break;
3077 }
3078 }
3079 break;
3080
3081 case ISIS_TLV_RESTART_SIGNALING:
3082 /* first attempt to decode the flags */
3083 if (tmp < ISIS_TLV_RESTART_SIGNALING_FLAGLEN)
3084 break;
3085 ND_TCHECK_LEN(tptr, ISIS_TLV_RESTART_SIGNALING_FLAGLEN);
3086 ND_PRINT("\n\t Flags [%s]",
3087 bittok2str(isis_restart_flag_values, "none", EXTRACT_U_1(tptr)));
3088 tptr+=ISIS_TLV_RESTART_SIGNALING_FLAGLEN;
3089 tmp-=ISIS_TLV_RESTART_SIGNALING_FLAGLEN;
3090
3091 /* is there anything other than the flags field? */
3092 if (tmp == 0)
3093 break;
3094
3095 if (tmp < ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN)
3096 break;
3097 ND_TCHECK_LEN(tptr, ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN);
3098
3099 ND_PRINT(", Remaining holding time %us", EXTRACT_BE_U_2(tptr));
3100 tptr+=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN;
3101 tmp-=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN;
3102
3103 /* is there an additional sysid field present ?*/
3104 if (tmp == SYSTEM_ID_LEN) {
3105 ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN);
3106 ND_PRINT(", for %s", isis_print_id(tptr,SYSTEM_ID_LEN));
3107 }
3108 break;
3109
3110 case ISIS_TLV_IDRP_INFO:
3111 if (tmp < ISIS_TLV_IDRP_INFO_MINLEN)
3112 break;
3113 ND_TCHECK_LEN(tptr, ISIS_TLV_IDRP_INFO_MINLEN);
3114 ND_PRINT("\n\t Inter-Domain Information Type: %s",
3115 tok2str(isis_subtlv_idrp_values,
3116 "Unknown (0x%02x)",
3117 EXTRACT_U_1(tptr)));
3118 isis_subtlv_idrp = EXTRACT_U_1(tptr);
3119 tptr++;
3120 switch (isis_subtlv_idrp) {
3121 case ISIS_SUBTLV_IDRP_ASN:
3122 ND_TCHECK_2(tptr); /* fetch AS number */
3123 ND_PRINT("AS Number: %u", EXTRACT_BE_U_2(tptr));
3124 break;
3125 case ISIS_SUBTLV_IDRP_LOCAL:
3126 case ISIS_SUBTLV_IDRP_RES:
3127 default:
3128 if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_len - 1))
3129 return(0);
3130 break;
3131 }
3132 break;
3133
3134 case ISIS_TLV_LSP_BUFFERSIZE:
3135 if (tmp < ISIS_TLV_LSP_BUFFERSIZE_MINLEN)
3136 break;
3137 ND_TCHECK_LEN(tptr, ISIS_TLV_LSP_BUFFERSIZE_MINLEN);
3138 ND_PRINT("\n\t LSP Buffersize: %u", EXTRACT_BE_U_2(tptr));
3139 break;
3140
3141 case ISIS_TLV_PART_DIS:
3142 while (tmp >= SYSTEM_ID_LEN) {
3143 ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN);
3144 ND_PRINT("\n\t %s", isis_print_id(tptr, SYSTEM_ID_LEN));
3145 tptr+=SYSTEM_ID_LEN;
3146 tmp-=SYSTEM_ID_LEN;
3147 }
3148 break;
3149
3150 case ISIS_TLV_PREFIX_NEIGH:
3151 if (tmp < sizeof(struct isis_metric_block))
3152 break;
3153 ND_TCHECK_LEN(tptr, sizeof(struct isis_metric_block));
3154 ND_PRINT("\n\t Metric Block");
3155 isis_print_metric_block(ndo, (const struct isis_metric_block *)tptr);
3156 tptr+=sizeof(struct isis_metric_block);
3157 tmp-=sizeof(struct isis_metric_block);
3158
3159 while(tmp>0) {
3160 ND_TCHECK_1(tptr);
3161 prefix_len=EXTRACT_U_1(tptr); /* read out prefix length in semioctets*/
3162 tptr++;
3163 if (prefix_len < 2) {
3164 ND_PRINT("\n\t\tAddress: prefix length %u < 2", prefix_len);
3165 break;
3166 }
3167 tmp--;
3168 if (tmp < prefix_len/2)
3169 break;
3170 ND_TCHECK_LEN(tptr, prefix_len / 2);
3171 ND_PRINT("\n\t\tAddress: %s/%u",
3172 isonsap_string(ndo, tptr, prefix_len / 2), prefix_len * 4);
3173 tptr+=prefix_len/2;
3174 tmp-=prefix_len/2;
3175 }
3176 break;
3177
3178 case ISIS_TLV_IIH_SEQNR:
3179 if (tmp < ISIS_TLV_IIH_SEQNR_MINLEN)
3180 break;
3181 ND_TCHECK_LEN(tptr, ISIS_TLV_IIH_SEQNR_MINLEN); /* check if four bytes are on the wire */
3182 ND_PRINT("\n\t Sequence number: %u", EXTRACT_BE_U_4(tptr));
3183 break;
3184
3185 case ISIS_TLV_VENDOR_PRIVATE:
3186 if (tmp < ISIS_TLV_VENDOR_PRIVATE_MINLEN)
3187 break;
3188 ND_TCHECK_LEN(tptr, ISIS_TLV_VENDOR_PRIVATE_MINLEN); /* check if enough byte for a full oui */
3189 vendor_id = EXTRACT_BE_U_3(tptr);
3190 ND_PRINT("\n\t Vendor: %s (%u)",
3191 tok2str(oui_values, "Unknown", vendor_id),
3192 vendor_id);
3193 tptr+=3;
3194 tmp-=3;
3195 if (tmp > 0) /* hexdump the rest */
3196 if (!print_unknown_data(ndo, tptr, "\n\t\t", tmp))
3197 return(0);
3198 break;
3199 /*
3200 * FIXME those are the defined TLVs that lack a decoder
3201 * you are welcome to contribute code ;-)
3202 */
3203
3204 case ISIS_TLV_DECNET_PHASE4:
3205 case ISIS_TLV_LUCENT_PRIVATE:
3206 case ISIS_TLV_IPAUTH:
3207 case ISIS_TLV_NORTEL_PRIVATE1:
3208 case ISIS_TLV_NORTEL_PRIVATE2:
3209
3210 default:
3211 if (ndo->ndo_vflag <= 1) {
3212 if (!print_unknown_data(ndo, pptr, "\n\t\t", tlv_len))
3213 return(0);
3214 }
3215 break;
3216 }
3217 /* do we want to see an additionally hexdump ? */
3218 if (ndo->ndo_vflag> 1) {
3219 if (!print_unknown_data(ndo, pptr, "\n\t ", tlv_len))
3220 return(0);
3221 }
3222
3223 pptr += tlv_len;
3224 packet_len -= tlv_len;
3225 }
3226
3227 if (packet_len != 0) {
3228 ND_PRINT("\n\t %u straggler bytes", packet_len);
3229 }
3230 return (1);
3231
3232 trunc:
3233 nd_print_trunc(ndo);
3234 return (1);
3235 }
3236
3237 static void
3238 osi_print_cksum(netdissect_options *ndo, const uint8_t *pptr,
3239 uint16_t checksum, int checksum_offset, u_int length)
3240 {
3241 uint16_t calculated_checksum;
3242
3243 /* do not attempt to verify the checksum if it is zero,
3244 * if the offset is nonsense,
3245 * or the base pointer is not sane
3246 */
3247 if (!checksum
3248 || checksum_offset < 0
3249 || !ND_TTEST_2(pptr + checksum_offset)
3250 || (u_int)checksum_offset > length
3251 || !ND_TTEST_LEN(pptr, length)) {
3252 ND_PRINT(" (unverified)");
3253 } else {
3254 #if 0
3255 printf("\nosi_print_cksum: %p %u %u\n", pptr, checksum_offset, length);
3256 #endif
3257 calculated_checksum = create_osi_cksum(pptr, checksum_offset, length);
3258 if (checksum == calculated_checksum) {
3259 ND_PRINT(" (correct)");
3260 } else {
3261 ND_PRINT(" (incorrect should be 0x%04x)", calculated_checksum);
3262 }
3263 }
3264 }
[mirror] the TCPdump network dissector