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@juniper.net) for more
24 * complete IS-IS & CLNP support.
25 */
26
27 #include <sys/cdefs.h>
28 #ifndef lint
29 __RCSID("$NetBSD: print-isoclns.c,v 1.6 2015/03/31 21:59:35 christos Exp $");
30 #endif
31
32 #define NETDISSECT_REWORKED
33 #ifdef HAVE_CONFIG_H
34 #include "config.h"
35 #endif
36
37 #include <tcpdump-stdinc.h>
38
39 #include <string.h>
40
41 #include "interface.h"
42 #include "addrtoname.h"
43 #include "ether.h"
44 #include "nlpid.h"
45 #include "extract.h"
46 #include "gmpls.h"
47 #include "oui.h"
48 #include "signature.h"
49
50 /*
51 * IS-IS is defined in ISO 10589. Look there for protocol definitions.
52 */
53
54 #define SYSTEM_ID_LEN ETHER_ADDR_LEN
55 #define NODE_ID_LEN SYSTEM_ID_LEN+1
56 #define LSP_ID_LEN SYSTEM_ID_LEN+2
57
58 #define ISIS_VERSION 1
59 #define ESIS_VERSION 1
60 #define CLNP_VERSION 1
61
62 #define ISIS_PDU_TYPE_MASK 0x1F
63 #define ESIS_PDU_TYPE_MASK 0x1F
64 #define CLNP_PDU_TYPE_MASK 0x1F
65 #define CLNP_FLAG_MASK 0xE0
66 #define ISIS_LAN_PRIORITY_MASK 0x7F
67
68 #define ISIS_PDU_L1_LAN_IIH 15
69 #define ISIS_PDU_L2_LAN_IIH 16
70 #define ISIS_PDU_PTP_IIH 17
71 #define ISIS_PDU_L1_LSP 18
72 #define ISIS_PDU_L2_LSP 20
73 #define ISIS_PDU_L1_CSNP 24
74 #define ISIS_PDU_L2_CSNP 25
75 #define ISIS_PDU_L1_PSNP 26
76 #define ISIS_PDU_L2_PSNP 27
77
78 static const struct tok isis_pdu_values[] = {
79 { ISIS_PDU_L1_LAN_IIH, "L1 Lan IIH"},
80 { ISIS_PDU_L2_LAN_IIH, "L2 Lan IIH"},
81 { ISIS_PDU_PTP_IIH, "p2p IIH"},
82 { ISIS_PDU_L1_LSP, "L1 LSP"},
83 { ISIS_PDU_L2_LSP, "L2 LSP"},
84 { ISIS_PDU_L1_CSNP, "L1 CSNP"},
85 { ISIS_PDU_L2_CSNP, "L2 CSNP"},
86 { ISIS_PDU_L1_PSNP, "L1 PSNP"},
87 { ISIS_PDU_L2_PSNP, "L2 PSNP"},
88 { 0, NULL}
89 };
90
91 /*
92 * A TLV is a tuple of a type, length and a value and is normally used for
93 * encoding information in all sorts of places. This is an enumeration of
94 * the well known types.
95 *
96 * list taken from rfc3359 plus some memory from veterans ;-)
97 */
98
99 #define ISIS_TLV_AREA_ADDR 1 /* iso10589 */
100 #define ISIS_TLV_IS_REACH 2 /* iso10589 */
101 #define ISIS_TLV_ESNEIGH 3 /* iso10589 */
102 #define ISIS_TLV_PART_DIS 4 /* iso10589 */
103 #define ISIS_TLV_PREFIX_NEIGH 5 /* iso10589 */
104 #define ISIS_TLV_ISNEIGH 6 /* iso10589 */
105 #define ISIS_TLV_ISNEIGH_VARLEN 7 /* iso10589 */
106 #define ISIS_TLV_PADDING 8 /* iso10589 */
107 #define ISIS_TLV_LSP 9 /* iso10589 */
108 #define ISIS_TLV_AUTH 10 /* iso10589, rfc3567 */
109 #define ISIS_TLV_CHECKSUM 12 /* rfc3358 */
110 #define ISIS_TLV_CHECKSUM_MINLEN 2
111 #define ISIS_TLV_LSP_BUFFERSIZE 14 /* iso10589 rev2 */
112 #define ISIS_TLV_LSP_BUFFERSIZE_MINLEN 2
113 #define ISIS_TLV_EXT_IS_REACH 22 /* draft-ietf-isis-traffic-05 */
114 #define ISIS_TLV_IS_ALIAS_ID 24 /* draft-ietf-isis-ext-lsp-frags-02 */
115 #define ISIS_TLV_DECNET_PHASE4 42
116 #define ISIS_TLV_LUCENT_PRIVATE 66
117 #define ISIS_TLV_INT_IP_REACH 128 /* rfc1195, rfc2966 */
118 #define ISIS_TLV_PROTOCOLS 129 /* rfc1195 */
119 #define ISIS_TLV_EXT_IP_REACH 130 /* rfc1195, rfc2966 */
120 #define ISIS_TLV_IDRP_INFO 131 /* rfc1195 */
121 #define ISIS_TLV_IDRP_INFO_MINLEN 1
122 #define ISIS_TLV_IPADDR 132 /* rfc1195 */
123 #define ISIS_TLV_IPAUTH 133 /* rfc1195 */
124 #define ISIS_TLV_TE_ROUTER_ID 134 /* draft-ietf-isis-traffic-05 */
125 #define ISIS_TLV_EXTD_IP_REACH 135 /* draft-ietf-isis-traffic-05 */
126 #define ISIS_TLV_HOSTNAME 137 /* rfc2763 */
127 #define ISIS_TLV_SHARED_RISK_GROUP 138 /* draft-ietf-isis-gmpls-extensions */
128 #define ISIS_TLV_MT_PORT_CAP 143 /* rfc6165 */
129 #define ISIS_TLV_MT_CAPABILITY 144 /* rfc6329 */
130 #define ISIS_TLV_NORTEL_PRIVATE1 176
131 #define ISIS_TLV_NORTEL_PRIVATE2 177
132 #define ISIS_TLV_RESTART_SIGNALING 211 /* rfc3847 */
133 #define ISIS_TLV_RESTART_SIGNALING_FLAGLEN 1
134 #define ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN 2
135 #define ISIS_TLV_MT_IS_REACH 222 /* draft-ietf-isis-wg-multi-topology-05 */
136 #define ISIS_TLV_MT_SUPPORTED 229 /* draft-ietf-isis-wg-multi-topology-05 */
137 #define ISIS_TLV_MT_SUPPORTED_MINLEN 2
138 #define ISIS_TLV_IP6ADDR 232 /* draft-ietf-isis-ipv6-02 */
139 #define ISIS_TLV_MT_IP_REACH 235 /* draft-ietf-isis-wg-multi-topology-05 */
140 #define ISIS_TLV_IP6_REACH 236 /* draft-ietf-isis-ipv6-02 */
141 #define ISIS_TLV_MT_IP6_REACH 237 /* draft-ietf-isis-wg-multi-topology-05 */
142 #define ISIS_TLV_PTP_ADJ 240 /* rfc3373 */
143 #define ISIS_TLV_IIH_SEQNR 241 /* draft-shen-isis-iih-sequence-00 */
144 #define ISIS_TLV_IIH_SEQNR_MINLEN 4
145 #define ISIS_TLV_VENDOR_PRIVATE 250 /* draft-ietf-isis-experimental-tlv-01 */
146 #define ISIS_TLV_VENDOR_PRIVATE_MINLEN 3
147
148 static const struct tok isis_tlv_values[] = {
149 { ISIS_TLV_AREA_ADDR, "Area address(es)"},
150 { ISIS_TLV_IS_REACH, "IS Reachability"},
151 { ISIS_TLV_ESNEIGH, "ES Neighbor(s)"},
152 { ISIS_TLV_PART_DIS, "Partition DIS"},
153 { ISIS_TLV_PREFIX_NEIGH, "Prefix Neighbors"},
154 { ISIS_TLV_ISNEIGH, "IS Neighbor(s)"},
155 { ISIS_TLV_ISNEIGH_VARLEN, "IS Neighbor(s) (variable length)"},
156 { ISIS_TLV_PADDING, "Padding"},
157 { ISIS_TLV_LSP, "LSP entries"},
158 { ISIS_TLV_AUTH, "Authentication"},
159 { ISIS_TLV_CHECKSUM, "Checksum"},
160 { ISIS_TLV_LSP_BUFFERSIZE, "LSP Buffersize"},
161 { ISIS_TLV_EXT_IS_REACH, "Extended IS Reachability"},
162 { ISIS_TLV_IS_ALIAS_ID, "IS Alias ID"},
163 { ISIS_TLV_DECNET_PHASE4, "DECnet Phase IV"},
164 { ISIS_TLV_LUCENT_PRIVATE, "Lucent Proprietary"},
165 { ISIS_TLV_INT_IP_REACH, "IPv4 Internal Reachability"},
166 { ISIS_TLV_PROTOCOLS, "Protocols supported"},
167 { ISIS_TLV_EXT_IP_REACH, "IPv4 External Reachability"},
168 { ISIS_TLV_IDRP_INFO, "Inter-Domain Information Type"},
169 { ISIS_TLV_IPADDR, "IPv4 Interface address(es)"},
170 { ISIS_TLV_IPAUTH, "IPv4 authentication (deprecated)"},
171 { ISIS_TLV_TE_ROUTER_ID, "Traffic Engineering Router ID"},
172 { ISIS_TLV_EXTD_IP_REACH, "Extended IPv4 Reachability"},
173 { ISIS_TLV_SHARED_RISK_GROUP, "Shared Risk Link Group"},
174 { ISIS_TLV_MT_PORT_CAP, "Multi-Topology-Aware Port Capability"},
175 { ISIS_TLV_MT_CAPABILITY, "Multi-Topology Capability"},
176 { ISIS_TLV_NORTEL_PRIVATE1, "Nortel Proprietary"},
177 { ISIS_TLV_NORTEL_PRIVATE2, "Nortel Proprietary"},
178 { ISIS_TLV_HOSTNAME, "Hostname"},
179 { ISIS_TLV_RESTART_SIGNALING, "Restart Signaling"},
180 { ISIS_TLV_MT_IS_REACH, "Multi Topology IS Reachability"},
181 { ISIS_TLV_MT_SUPPORTED, "Multi Topology"},
182 { ISIS_TLV_IP6ADDR, "IPv6 Interface address(es)"},
183 { ISIS_TLV_MT_IP_REACH, "Multi-Topology IPv4 Reachability"},
184 { ISIS_TLV_IP6_REACH, "IPv6 reachability"},
185 { ISIS_TLV_MT_IP6_REACH, "Multi-Topology IP6 Reachability"},
186 { ISIS_TLV_PTP_ADJ, "Point-to-point Adjacency State"},
187 { ISIS_TLV_IIH_SEQNR, "Hello PDU Sequence Number"},
188 { ISIS_TLV_VENDOR_PRIVATE, "Vendor Private"},
189 { 0, NULL }
190 };
191
192 #define ESIS_OPTION_PROTOCOLS 129
193 #define ESIS_OPTION_QOS_MAINTENANCE 195 /* iso9542 */
194 #define ESIS_OPTION_SECURITY 197 /* iso9542 */
195 #define ESIS_OPTION_ES_CONF_TIME 198 /* iso9542 */
196 #define ESIS_OPTION_PRIORITY 205 /* iso9542 */
197 #define ESIS_OPTION_ADDRESS_MASK 225 /* iso9542 */
198 #define ESIS_OPTION_SNPA_MASK 226 /* iso9542 */
199
200 static const struct tok esis_option_values[] = {
201 { ESIS_OPTION_PROTOCOLS, "Protocols supported"},
202 { ESIS_OPTION_QOS_MAINTENANCE, "QoS Maintenance" },
203 { ESIS_OPTION_SECURITY, "Security" },
204 { ESIS_OPTION_ES_CONF_TIME, "ES Configuration Time" },
205 { ESIS_OPTION_PRIORITY, "Priority" },
206 { ESIS_OPTION_ADDRESS_MASK, "Addressk Mask" },
207 { ESIS_OPTION_SNPA_MASK, "SNPA Mask" },
208 { 0, NULL }
209 };
210
211 #define CLNP_OPTION_DISCARD_REASON 193
212 #define CLNP_OPTION_QOS_MAINTENANCE 195 /* iso8473 */
213 #define CLNP_OPTION_SECURITY 197 /* iso8473 */
214 #define CLNP_OPTION_SOURCE_ROUTING 200 /* iso8473 */
215 #define CLNP_OPTION_ROUTE_RECORDING 203 /* iso8473 */
216 #define CLNP_OPTION_PADDING 204 /* iso8473 */
217 #define CLNP_OPTION_PRIORITY 205 /* iso8473 */
218
219 static const struct tok clnp_option_values[] = {
220 { CLNP_OPTION_DISCARD_REASON, "Discard Reason"},
221 { CLNP_OPTION_PRIORITY, "Priority"},
222 { CLNP_OPTION_QOS_MAINTENANCE, "QoS Maintenance"},
223 { CLNP_OPTION_SECURITY, "Security"},
224 { CLNP_OPTION_SOURCE_ROUTING, "Source Routing"},
225 { CLNP_OPTION_ROUTE_RECORDING, "Route Recording"},
226 { CLNP_OPTION_PADDING, "Padding"},
227 { 0, NULL }
228 };
229
230 static const struct tok clnp_option_rfd_class_values[] = {
231 { 0x0, "General"},
232 { 0x8, "Address"},
233 { 0x9, "Source Routeing"},
234 { 0xa, "Lifetime"},
235 { 0xb, "PDU Discarded"},
236 { 0xc, "Reassembly"},
237 { 0, NULL }
238 };
239
240 static const struct tok clnp_option_rfd_general_values[] = {
241 { 0x0, "Reason not specified"},
242 { 0x1, "Protocol procedure error"},
243 { 0x2, "Incorrect checksum"},
244 { 0x3, "PDU discarded due to congestion"},
245 { 0x4, "Header syntax error (cannot be parsed)"},
246 { 0x5, "Segmentation needed but not permitted"},
247 { 0x6, "Incomplete PDU received"},
248 { 0x7, "Duplicate option"},
249 { 0, NULL }
250 };
251
252 static const struct tok clnp_option_rfd_address_values[] = {
253 { 0x0, "Destination address unreachable"},
254 { 0x1, "Destination address unknown"},
255 { 0, NULL }
256 };
257
258 static const struct tok clnp_option_rfd_source_routeing_values[] = {
259 { 0x0, "Unspecified source routeing error"},
260 { 0x1, "Syntax error in source routeing field"},
261 { 0x2, "Unknown address in source routeing field"},
262 { 0x3, "Path not acceptable"},
263 { 0, NULL }
264 };
265
266 static const struct tok clnp_option_rfd_lifetime_values[] = {
267 { 0x0, "Lifetime expired while data unit in transit"},
268 { 0x1, "Lifetime expired during reassembly"},
269 { 0, NULL }
270 };
271
272 static const struct tok clnp_option_rfd_pdu_discard_values[] = {
273 { 0x0, "Unsupported option not specified"},
274 { 0x1, "Unsupported protocol version"},
275 { 0x2, "Unsupported security option"},
276 { 0x3, "Unsupported source routeing option"},
277 { 0x4, "Unsupported recording of route option"},
278 { 0, NULL }
279 };
280
281 static const struct tok clnp_option_rfd_reassembly_values[] = {
282 { 0x0, "Reassembly interference"},
283 { 0, NULL }
284 };
285
286 /* array of 16 error-classes */
287 static const struct tok *clnp_option_rfd_error_class[] = {
288 clnp_option_rfd_general_values,
289 NULL,
290 NULL,
291 NULL,
292 NULL,
293 NULL,
294 NULL,
295 NULL,
296 clnp_option_rfd_address_values,
297 clnp_option_rfd_source_routeing_values,
298 clnp_option_rfd_lifetime_values,
299 clnp_option_rfd_pdu_discard_values,
300 clnp_option_rfd_reassembly_values,
301 NULL,
302 NULL,
303 NULL
304 };
305
306 #define CLNP_OPTION_OPTION_QOS_MASK 0x3f
307 #define CLNP_OPTION_SCOPE_MASK 0xc0
308 #define CLNP_OPTION_SCOPE_SA_SPEC 0x40
309 #define CLNP_OPTION_SCOPE_DA_SPEC 0x80
310 #define CLNP_OPTION_SCOPE_GLOBAL 0xc0
311
312 static const struct tok clnp_option_scope_values[] = {
313 { CLNP_OPTION_SCOPE_SA_SPEC, "Source Address Specific"},
314 { CLNP_OPTION_SCOPE_DA_SPEC, "Destination Address Specific"},
315 { CLNP_OPTION_SCOPE_GLOBAL, "Globally unique"},
316 { 0, NULL }
317 };
318
319 static const struct tok clnp_option_sr_rr_values[] = {
320 { 0x0, "partial"},
321 { 0x1, "complete"},
322 { 0, NULL }
323 };
324
325 static const struct tok clnp_option_sr_rr_string_values[] = {
326 { CLNP_OPTION_SOURCE_ROUTING, "source routing"},
327 { CLNP_OPTION_ROUTE_RECORDING, "recording of route in progress"},
328 { 0, NULL }
329 };
330
331 static const struct tok clnp_option_qos_global_values[] = {
332 { 0x20, "reserved"},
333 { 0x10, "sequencing vs. delay"},
334 { 0x08, "congested"},
335 { 0x04, "delay vs. cost"},
336 { 0x02, "error vs. delay"},
337 { 0x01, "error vs. cost"},
338 { 0, NULL }
339 };
340
341 #define ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP 3 /* draft-ietf-isis-traffic-05 */
342 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID 4 /* rfc4205 */
343 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID 5 /* draft-ietf-isis-traffic-05 */
344 #define ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR 6 /* draft-ietf-isis-traffic-05 */
345 #define ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR 8 /* draft-ietf-isis-traffic-05 */
346 #define ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW 9 /* draft-ietf-isis-traffic-05 */
347 #define ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW 10 /* draft-ietf-isis-traffic-05 */
348 #define ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW 11 /* rfc4124 */
349 #define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD 12 /* draft-ietf-tewg-diff-te-proto-06 */
350 #define ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC 18 /* draft-ietf-isis-traffic-05 */
351 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE 19 /* draft-ietf-isis-link-attr-01 */
352 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE 20 /* rfc4205 */
353 #define ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR 21 /* rfc4205 */
354 #define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS 22 /* rfc4124 */
355
356 #define ISIS_SUBTLV_SPB_METRIC 29 /* rfc6329 */
357
358 static const struct tok isis_ext_is_reach_subtlv_values[] = {
359 { ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP, "Administrative groups" },
360 { ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" },
361 { ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID, "Link Remote Identifier" },
362 { ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR, "IPv4 interface address" },
363 { ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR, "IPv4 neighbor address" },
364 { ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW, "Maximum link bandwidth" },
365 { ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW, "Reservable link bandwidth" },
366 { ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW, "Unreserved bandwidth" },
367 { ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC, "Traffic Engineering Metric" },
368 { ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE, "Link Attribute" },
369 { ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE, "Link Protection Type" },
370 { ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR, "Interface Switching Capability" },
371 { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD, "Bandwidth Constraints (old)" },
372 { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS, "Bandwidth Constraints" },
373 { ISIS_SUBTLV_SPB_METRIC, "SPB Metric" },
374 { 250, "Reserved for cisco specific extensions" },
375 { 251, "Reserved for cisco specific extensions" },
376 { 252, "Reserved for cisco specific extensions" },
377 { 253, "Reserved for cisco specific extensions" },
378 { 254, "Reserved for cisco specific extensions" },
379 { 255, "Reserved for future expansion" },
380 { 0, NULL }
381 };
382
383 #define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32 1 /* draft-ietf-isis-admin-tags-01 */
384 #define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64 2 /* draft-ietf-isis-admin-tags-01 */
385 #define ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR 117 /* draft-ietf-isis-wg-multi-topology-05 */
386
387 static const struct tok isis_ext_ip_reach_subtlv_values[] = {
388 { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32, "32-Bit Administrative tag" },
389 { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64, "64-Bit Administrative tag" },
390 { ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR, "Management Prefix Color" },
391 { 0, NULL }
392 };
393
394 static const struct tok isis_subtlv_link_attribute_values[] = {
395 { 0x01, "Local Protection Available" },
396 { 0x02, "Link excluded from local protection path" },
397 { 0x04, "Local maintenance required"},
398 { 0, NULL }
399 };
400
401 #define ISIS_SUBTLV_AUTH_SIMPLE 1
402 #define ISIS_SUBTLV_AUTH_GENERIC 3 /* rfc 5310 */
403 #define ISIS_SUBTLV_AUTH_MD5 54
404 #define ISIS_SUBTLV_AUTH_MD5_LEN 16
405 #define ISIS_SUBTLV_AUTH_PRIVATE 255
406
407 static const struct tok isis_subtlv_auth_values[] = {
408 { ISIS_SUBTLV_AUTH_SIMPLE, "simple text password"},
409 { ISIS_SUBTLV_AUTH_GENERIC, "Generic Crypto key-id"},
410 { ISIS_SUBTLV_AUTH_MD5, "HMAC-MD5 password"},
411 { ISIS_SUBTLV_AUTH_PRIVATE, "Routing Domain private password"},
412 { 0, NULL }
413 };
414
415 #define ISIS_SUBTLV_IDRP_RES 0
416 #define ISIS_SUBTLV_IDRP_LOCAL 1
417 #define ISIS_SUBTLV_IDRP_ASN 2
418
419 static const struct tok isis_subtlv_idrp_values[] = {
420 { ISIS_SUBTLV_IDRP_RES, "Reserved"},
421 { ISIS_SUBTLV_IDRP_LOCAL, "Routing-Domain Specific"},
422 { ISIS_SUBTLV_IDRP_ASN, "AS Number Tag"},
423 { 0, NULL}
424 };
425
426 #define ISIS_SUBTLV_SPB_MCID 4
427 #define ISIS_SUBTLV_SPB_DIGEST 5
428 #define ISIS_SUBTLV_SPB_BVID 6
429
430 #define ISIS_SUBTLV_SPB_INSTANCE 1
431 #define ISIS_SUBTLV_SPBM_SI 3
432
433 #define ISIS_SPB_MCID_LEN 51
434 #define ISIS_SUBTLV_SPB_MCID_MIN_LEN 102
435 #define ISIS_SUBTLV_SPB_DIGEST_MIN_LEN 33
436 #define ISIS_SUBTLV_SPB_BVID_MIN_LEN 6
437 #define ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN 19
438 #define ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN 8
439
440 static const struct tok isis_mt_port_cap_subtlv_values[] = {
441 { ISIS_SUBTLV_SPB_MCID, "SPB MCID" },
442 { ISIS_SUBTLV_SPB_DIGEST, "SPB Digest" },
443 { ISIS_SUBTLV_SPB_BVID, "SPB BVID" },
444 { 0, NULL }
445 };
446
447 static const struct tok isis_mt_capability_subtlv_values[] = {
448 { ISIS_SUBTLV_SPB_INSTANCE, "SPB Instance" },
449 { ISIS_SUBTLV_SPBM_SI, "SPBM Service Identifier and Unicast Address" },
450 { 0, NULL }
451 };
452
453 struct isis_spb_mcid {
454 uint8_t format_id;
455 uint8_t name[32];
456 uint8_t revision_lvl[2];
457 uint8_t digest[16];
458 };
459
460 struct isis_subtlv_spb_mcid {
461 struct isis_spb_mcid mcid;
462 struct isis_spb_mcid aux_mcid;
463 };
464
465 struct isis_subtlv_spb_instance {
466 uint8_t cist_root_id[8];
467 uint8_t cist_external_root_path_cost[4];
468 uint8_t bridge_priority[2];
469 uint8_t spsourceid[4];
470 uint8_t no_of_trees;
471 };
472
473 #define CLNP_SEGMENT_PART 0x80
474 #define CLNP_MORE_SEGMENTS 0x40
475 #define CLNP_REQUEST_ER 0x20
476
477 static const struct tok clnp_flag_values[] = {
478 { CLNP_SEGMENT_PART, "Segmentation permitted"},
479 { CLNP_MORE_SEGMENTS, "more Segments"},
480 { CLNP_REQUEST_ER, "request Error Report"},
481 { 0, NULL}
482 };
483
484 #define ISIS_MASK_LSP_OL_BIT(x) ((x)&0x4)
485 #define ISIS_MASK_LSP_ISTYPE_BITS(x) ((x)&0x3)
486 #define ISIS_MASK_LSP_PARTITION_BIT(x) ((x)&0x80)
487 #define ISIS_MASK_LSP_ATT_BITS(x) ((x)&0x78)
488 #define ISIS_MASK_LSP_ATT_ERROR_BIT(x) ((x)&0x40)
489 #define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x) ((x)&0x20)
490 #define ISIS_MASK_LSP_ATT_DELAY_BIT(x) ((x)&0x10)
491 #define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x) ((x)&0x8)
492
493 #define ISIS_MASK_MTID(x) ((x)&0x0fff)
494 #define ISIS_MASK_MTFLAGS(x) ((x)&0xf000)
495
496 static const struct tok isis_mt_flag_values[] = {
497 { 0x4000, "ATT bit set"},
498 { 0x8000, "Overload bit set"},
499 { 0, NULL}
500 };
501
502 #define ISIS_MASK_TLV_EXTD_IP_UPDOWN(x) ((x)&0x80)
503 #define ISIS_MASK_TLV_EXTD_IP_SUBTLV(x) ((x)&0x40)
504
505 #define ISIS_MASK_TLV_EXTD_IP6_IE(x) ((x)&0x40)
506 #define ISIS_MASK_TLV_EXTD_IP6_SUBTLV(x) ((x)&0x20)
507
508 #define ISIS_LSP_TLV_METRIC_SUPPORTED(x) ((x)&0x80)
509 #define ISIS_LSP_TLV_METRIC_IE(x) ((x)&0x40)
510 #define ISIS_LSP_TLV_METRIC_UPDOWN(x) ((x)&0x80)
511 #define ISIS_LSP_TLV_METRIC_VALUE(x) ((x)&0x3f)
512
513 #define ISIS_MASK_TLV_SHARED_RISK_GROUP(x) ((x)&0x1)
514
515 static const struct tok isis_mt_values[] = {
516 { 0, "IPv4 unicast"},
517 { 1, "In-Band Management"},
518 { 2, "IPv6 unicast"},
519 { 3, "Multicast"},
520 { 4095, "Development, Experimental or Proprietary"},
521 { 0, NULL }
522 };
523
524 static const struct tok isis_iih_circuit_type_values[] = {
525 { 1, "Level 1 only"},
526 { 2, "Level 2 only"},
527 { 3, "Level 1, Level 2"},
528 { 0, NULL}
529 };
530
531 #define ISIS_LSP_TYPE_UNUSED0 0
532 #define ISIS_LSP_TYPE_LEVEL_1 1
533 #define ISIS_LSP_TYPE_UNUSED2 2
534 #define ISIS_LSP_TYPE_LEVEL_2 3
535
536 static const struct tok isis_lsp_istype_values[] = {
537 { ISIS_LSP_TYPE_UNUSED0, "Unused 0x0 (invalid)"},
538 { ISIS_LSP_TYPE_LEVEL_1, "L1 IS"},
539 { ISIS_LSP_TYPE_UNUSED2, "Unused 0x2 (invalid)"},
540 { ISIS_LSP_TYPE_LEVEL_2, "L2 IS"},
541 { 0, NULL }
542 };
543
544 /*
545 * Katz's point to point adjacency TLV uses codes to tell us the state of
546 * the remote adjacency. Enumerate them.
547 */
548
549 #define ISIS_PTP_ADJ_UP 0
550 #define ISIS_PTP_ADJ_INIT 1
551 #define ISIS_PTP_ADJ_DOWN 2
552
553 static const struct tok isis_ptp_adjancey_values[] = {
554 { ISIS_PTP_ADJ_UP, "Up" },
555 { ISIS_PTP_ADJ_INIT, "Initializing" },
556 { ISIS_PTP_ADJ_DOWN, "Down" },
557 { 0, NULL}
558 };
559
560 struct isis_tlv_ptp_adj {
561 uint8_t adjacency_state;
562 uint8_t extd_local_circuit_id[4];
563 uint8_t neighbor_sysid[SYSTEM_ID_LEN];
564 uint8_t neighbor_extd_local_circuit_id[4];
565 };
566
567 static void osi_print_cksum(netdissect_options *, const uint8_t *pptr, uint16_t checksum,
568 u_int checksum_offset, u_int length);
569 static int clnp_print(netdissect_options *, const uint8_t *, u_int);
570 static void esis_print(netdissect_options *, const uint8_t *, u_int);
571 static int isis_print(netdissect_options *, const uint8_t *, u_int);
572
573 struct isis_metric_block {
574 uint8_t metric_default;
575 uint8_t metric_delay;
576 uint8_t metric_expense;
577 uint8_t metric_error;
578 };
579
580 struct isis_tlv_is_reach {
581 struct isis_metric_block isis_metric_block;
582 uint8_t neighbor_nodeid[NODE_ID_LEN];
583 };
584
585 struct isis_tlv_es_reach {
586 struct isis_metric_block isis_metric_block;
587 uint8_t neighbor_sysid[SYSTEM_ID_LEN];
588 };
589
590 struct isis_tlv_ip_reach {
591 struct isis_metric_block isis_metric_block;
592 uint8_t prefix[4];
593 uint8_t mask[4];
594 };
595
596 static const struct tok isis_is_reach_virtual_values[] = {
597 { 0, "IsNotVirtual"},
598 { 1, "IsVirtual"},
599 { 0, NULL }
600 };
601
602 static const struct tok isis_restart_flag_values[] = {
603 { 0x1, "Restart Request"},
604 { 0x2, "Restart Acknowledgement"},
605 { 0x4, "Suppress adjacency advertisement"},
606 { 0, NULL }
607 };
608
609 struct isis_common_header {
610 uint8_t nlpid;
611 uint8_t fixed_len;
612 uint8_t version; /* Protocol version */
613 uint8_t id_length;
614 uint8_t pdu_type; /* 3 MSbits are reserved */
615 uint8_t pdu_version; /* Packet format version */
616 uint8_t reserved;
617 uint8_t max_area;
618 };
619
620 struct isis_iih_lan_header {
621 uint8_t circuit_type;
622 uint8_t source_id[SYSTEM_ID_LEN];
623 uint8_t holding_time[2];
624 uint8_t pdu_len[2];
625 uint8_t priority;
626 uint8_t lan_id[NODE_ID_LEN];
627 };
628
629 struct isis_iih_ptp_header {
630 uint8_t circuit_type;
631 uint8_t source_id[SYSTEM_ID_LEN];
632 uint8_t holding_time[2];
633 uint8_t pdu_len[2];
634 uint8_t circuit_id;
635 };
636
637 struct isis_lsp_header {
638 uint8_t pdu_len[2];
639 uint8_t remaining_lifetime[2];
640 uint8_t lsp_id[LSP_ID_LEN];
641 uint8_t sequence_number[4];
642 uint8_t checksum[2];
643 uint8_t typeblock;
644 };
645
646 struct isis_csnp_header {
647 uint8_t pdu_len[2];
648 uint8_t source_id[NODE_ID_LEN];
649 uint8_t start_lsp_id[LSP_ID_LEN];
650 uint8_t end_lsp_id[LSP_ID_LEN];
651 };
652
653 struct isis_psnp_header {
654 uint8_t pdu_len[2];
655 uint8_t source_id[NODE_ID_LEN];
656 };
657
658 struct isis_tlv_lsp {
659 uint8_t remaining_lifetime[2];
660 uint8_t lsp_id[LSP_ID_LEN];
661 uint8_t sequence_number[4];
662 uint8_t checksum[2];
663 };
664
665 #define ISIS_COMMON_HEADER_SIZE (sizeof(struct isis_common_header))
666 #define ISIS_IIH_LAN_HEADER_SIZE (sizeof(struct isis_iih_lan_header))
667 #define ISIS_IIH_PTP_HEADER_SIZE (sizeof(struct isis_iih_ptp_header))
668 #define ISIS_LSP_HEADER_SIZE (sizeof(struct isis_lsp_header))
669 #define ISIS_CSNP_HEADER_SIZE (sizeof(struct isis_csnp_header))
670 #define ISIS_PSNP_HEADER_SIZE (sizeof(struct isis_psnp_header))
671
isoclns_print(netdissect_options * ndo,const uint8_t * p,u_int length,u_int caplen)672 void isoclns_print(netdissect_options *ndo,
673 const uint8_t *p, u_int length, u_int caplen)
674 {
675 if (caplen <= 1) { /* enough bytes on the wire ? */
676 ND_PRINT((ndo, "|OSI"));
677 return;
678 }
679
680 if (ndo->ndo_eflag)
681 ND_PRINT((ndo, "OSI NLPID %s (0x%02x): ", tok2str(nlpid_values, "Unknown", *p), *p));
682
683 switch (*p) {
684
685 case NLPID_CLNP:
686 if (!clnp_print(ndo, p, length))
687 print_unknown_data(ndo, p, "\n\t", caplen);
688 break;
689
690 case NLPID_ESIS:
691 esis_print(ndo, p, length);
692 return;
693
694 case NLPID_ISIS:
695 if (!isis_print(ndo, p, length))
696 print_unknown_data(ndo, p, "\n\t", caplen);
697 break;
698
699 case NLPID_NULLNS:
700 ND_PRINT((ndo, "%slength: %u", ndo->ndo_eflag ? "" : ", ", length));
701 break;
702
703 case NLPID_Q933:
704 q933_print(ndo, p + 1, length - 1);
705 break;
706
707 case NLPID_IP:
708 ip_print(ndo, p + 1, length - 1);
709 break;
710
711 case NLPID_IP6:
712 ip6_print(ndo, p + 1, length - 1);
713 break;
714
715 case NLPID_PPP:
716 ppp_print(ndo, p + 1, length - 1);
717 break;
718
719 default:
720 if (!ndo->ndo_eflag)
721 ND_PRINT((ndo, "OSI NLPID 0x%02x unknown", *p));
722 ND_PRINT((ndo, "%slength: %u", ndo->ndo_eflag ? "" : ", ", length));
723 if (caplen > 1)
724 print_unknown_data(ndo, p, "\n\t", caplen);
725 break;
726 }
727 }
728
729 #define CLNP_PDU_ER 1
730 #define CLNP_PDU_DT 28
731 #define CLNP_PDU_MD 29
732 #define CLNP_PDU_ERQ 30
733 #define CLNP_PDU_ERP 31
734
735 static const struct tok clnp_pdu_values[] = {
736 { CLNP_PDU_ER, "Error Report"},
737 { CLNP_PDU_MD, "MD"},
738 { CLNP_PDU_DT, "Data"},
739 { CLNP_PDU_ERQ, "Echo Request"},
740 { CLNP_PDU_ERP, "Echo Response"},
741 { 0, NULL }
742 };
743
744 struct clnp_header_t {
745 uint8_t nlpid;
746 uint8_t length_indicator;
747 uint8_t version;
748 uint8_t lifetime; /* units of 500ms */
749 uint8_t type;
750 uint8_t segment_length[2];
751 uint8_t cksum[2];
752 };
753
754 struct clnp_segment_header_t {
755 uint8_t data_unit_id[2];
756 uint8_t segment_offset[2];
757 uint8_t total_length[2];
758 };
759
760 /*
761 * clnp_print
762 * Decode CLNP packets. Return 0 on error.
763 */
764
765 static int
clnp_print(netdissect_options * ndo,const uint8_t * pptr,u_int length)766 clnp_print(netdissect_options *ndo,
767 const uint8_t *pptr, u_int length)
768 {
769 const uint8_t *optr,*source_address,*dest_address;
770 u_int li,tlen,nsap_offset,source_address_length,dest_address_length, clnp_pdu_type, clnp_flags;
771 const struct clnp_header_t *clnp_header;
772 const struct clnp_segment_header_t *clnp_segment_header;
773 uint8_t rfd_error_major,rfd_error_minor;
774
775 clnp_header = (const struct clnp_header_t *) pptr;
776 ND_TCHECK(*clnp_header);
777
778 li = clnp_header->length_indicator;
779 optr = pptr;
780
781 if (!ndo->ndo_eflag)
782 ND_PRINT((ndo, "CLNP"));
783
784 /*
785 * Sanity checking of the header.
786 */
787
788 if (clnp_header->version != CLNP_VERSION) {
789 ND_PRINT((ndo, "version %d packet not supported", clnp_header->version));
790 return (0);
791 }
792
793 /* FIXME further header sanity checking */
794
795 clnp_pdu_type = clnp_header->type & CLNP_PDU_TYPE_MASK;
796 clnp_flags = clnp_header->type & CLNP_FLAG_MASK;
797
798 pptr += sizeof(struct clnp_header_t);
799 li -= sizeof(struct clnp_header_t);
800 dest_address_length = *pptr;
801 dest_address = pptr + 1;
802
803 pptr += (1 + dest_address_length);
804 li -= (1 + dest_address_length);
805 source_address_length = *pptr;
806 source_address = pptr +1;
807
808 pptr += (1 + source_address_length);
809 li -= (1 + source_address_length);
810
811 if (ndo->ndo_vflag < 1) {
812 ND_PRINT((ndo, "%s%s > %s, %s, length %u",
813 ndo->ndo_eflag ? "" : ", ",
814 isonsap_string(source_address, source_address_length),
815 isonsap_string(dest_address, dest_address_length),
816 tok2str(clnp_pdu_values,"unknown (%u)",clnp_pdu_type),
817 length));
818 return (1);
819 }
820 ND_PRINT((ndo, "%slength %u", ndo->ndo_eflag ? "" : ", ", length));
821
822 ND_PRINT((ndo, "\n\t%s PDU, hlen: %u, v: %u, lifetime: %u.%us, Segment PDU length: %u, checksum: 0x%04x",
823 tok2str(clnp_pdu_values, "unknown (%u)",clnp_pdu_type),
824 clnp_header->length_indicator,
825 clnp_header->version,
826 clnp_header->lifetime/2,
827 (clnp_header->lifetime%2)*5,
828 EXTRACT_16BITS(clnp_header->segment_length),
829 EXTRACT_16BITS(clnp_header->cksum)));
830
831 osi_print_cksum(ndo, optr, EXTRACT_16BITS(clnp_header->cksum), 7,
832 clnp_header->length_indicator);
833
834 ND_PRINT((ndo, "\n\tFlags [%s]",
835 bittok2str(clnp_flag_values, "none", clnp_flags)));
836
837 ND_PRINT((ndo, "\n\tsource address (length %u): %s\n\tdest address (length %u): %s",
838 source_address_length,
839 isonsap_string(source_address, source_address_length),
840 dest_address_length,
841 isonsap_string(dest_address, dest_address_length)));
842
843 if (clnp_flags & CLNP_SEGMENT_PART) {
844 clnp_segment_header = (const struct clnp_segment_header_t *) pptr;
845 ND_TCHECK(*clnp_segment_header);
846 ND_PRINT((ndo, "\n\tData Unit ID: 0x%04x, Segment Offset: %u, Total PDU Length: %u",
847 EXTRACT_16BITS(clnp_segment_header->data_unit_id),
848 EXTRACT_16BITS(clnp_segment_header->segment_offset),
849 EXTRACT_16BITS(clnp_segment_header->total_length)));
850 pptr+=sizeof(const struct clnp_segment_header_t);
851 li-=sizeof(const struct clnp_segment_header_t);
852 }
853
854 /* now walk the options */
855 while (li >= 2) {
856 u_int op, opli;
857 const uint8_t *tptr;
858
859 ND_TCHECK2(*pptr, 2);
860 if (li < 2) {
861 ND_PRINT((ndo, ", bad opts/li"));
862 return (0);
863 }
864 op = *pptr++;
865 opli = *pptr++;
866 li -= 2;
867 ND_TCHECK2(*pptr, opli);
868 if (opli > li) {
869 ND_PRINT((ndo, ", opt (%d) too long", op));
870 return (0);
871 }
872 li -= opli;
873 tptr = pptr;
874 tlen = opli;
875
876 ND_PRINT((ndo, "\n\t %s Option #%u, length %u, value: ",
877 tok2str(clnp_option_values,"Unknown",op),
878 op,
879 opli));
880
881 switch (op) {
882
883
884 case CLNP_OPTION_ROUTE_RECORDING: /* those two options share the format */
885 case CLNP_OPTION_SOURCE_ROUTING:
886 ND_PRINT((ndo, "%s %s",
887 tok2str(clnp_option_sr_rr_values,"Unknown",*tptr),
888 tok2str(clnp_option_sr_rr_string_values, "Unknown Option %u", op)));
889 nsap_offset=*(tptr+1);
890 if (nsap_offset == 0) {
891 ND_PRINT((ndo, " Bad NSAP offset (0)"));
892 break;
893 }
894 nsap_offset-=1; /* offset to nsap list */
895 if (nsap_offset > tlen) {
896 ND_PRINT((ndo, " Bad NSAP offset (past end of option)"));
897 break;
898 }
899 tptr+=nsap_offset;
900 tlen-=nsap_offset;
901 while (tlen > 0) {
902 source_address_length=*tptr;
903 if (tlen < source_address_length+1) {
904 ND_PRINT((ndo, "\n\t NSAP address goes past end of option"));
905 break;
906 }
907 if (source_address_length > 0) {
908 source_address=(tptr+1);
909 ND_TCHECK2(*source_address, source_address_length);
910 ND_PRINT((ndo, "\n\t NSAP address (length %u): %s",
911 source_address_length,
912 isonsap_string(source_address, source_address_length)));
913 }
914 tlen-=source_address_length+1;
915 }
916 break;
917
918 case CLNP_OPTION_PRIORITY:
919 ND_PRINT((ndo, "0x%1x", *tptr&0x0f));
920 break;
921
922 case CLNP_OPTION_QOS_MAINTENANCE:
923 ND_PRINT((ndo, "\n\t Format Code: %s",
924 tok2str(clnp_option_scope_values, "Reserved", *tptr&CLNP_OPTION_SCOPE_MASK)));
925
926 if ((*tptr&CLNP_OPTION_SCOPE_MASK) == CLNP_OPTION_SCOPE_GLOBAL)
927 ND_PRINT((ndo, "\n\t QoS Flags [%s]",
928 bittok2str(clnp_option_qos_global_values,
929 "none",
930 *tptr&CLNP_OPTION_OPTION_QOS_MASK)));
931 break;
932
933 case CLNP_OPTION_SECURITY:
934 ND_PRINT((ndo, "\n\t Format Code: %s, Security-Level %u",
935 tok2str(clnp_option_scope_values,"Reserved",*tptr&CLNP_OPTION_SCOPE_MASK),
936 *(tptr+1)));
937 break;
938
939 case CLNP_OPTION_DISCARD_REASON:
940 rfd_error_major = (*tptr&0xf0) >> 4;
941 rfd_error_minor = *tptr&0x0f;
942 ND_PRINT((ndo, "\n\t Class: %s Error (0x%01x), %s (0x%01x)",
943 tok2str(clnp_option_rfd_class_values,"Unknown",rfd_error_major),
944 rfd_error_major,
945 tok2str(clnp_option_rfd_error_class[rfd_error_major],"Unknown",rfd_error_minor),
946 rfd_error_minor));
947 break;
948
949 case CLNP_OPTION_PADDING:
950 ND_PRINT((ndo, "padding data"));
951 break;
952
953 /*
954 * FIXME those are the defined Options that lack a decoder
955 * you are welcome to contribute code ;-)
956 */
957
958 default:
959 print_unknown_data(ndo, tptr, "\n\t ", opli);
960 break;
961 }
962 if (ndo->ndo_vflag > 1)
963 print_unknown_data(ndo, pptr, "\n\t ", opli);
964 pptr += opli;
965 }
966
967 switch (clnp_pdu_type) {
968
969 case CLNP_PDU_ER: /* fall through */
970 case CLNP_PDU_ERP:
971 ND_TCHECK(*pptr);
972 if (*(pptr) == NLPID_CLNP) {
973 ND_PRINT((ndo, "\n\t-----original packet-----\n\t"));
974 /* FIXME recursion protection */
975 clnp_print(ndo, pptr, length - clnp_header->length_indicator);
976 break;
977 }
978
979 case CLNP_PDU_DT:
980 case CLNP_PDU_MD:
981 case CLNP_PDU_ERQ:
982
983 default:
984 /* dump the PDU specific data */
985 if (length-(pptr-optr) > 0) {
986 ND_PRINT((ndo, "\n\t undecoded non-header data, length %u", length-clnp_header->length_indicator));
987 print_unknown_data(ndo, pptr, "\n\t ", length - (pptr - optr));
988 }
989 }
990
991 return (1);
992
993 trunc:
994 ND_PRINT((ndo, "[|clnp]"));
995 return (1);
996
997 }
998
999
1000 #define ESIS_PDU_REDIRECT 6
1001 #define ESIS_PDU_ESH 2
1002 #define ESIS_PDU_ISH 4
1003
1004 static const struct tok esis_pdu_values[] = {
1005 { ESIS_PDU_REDIRECT, "redirect"},
1006 { ESIS_PDU_ESH, "ESH"},
1007 { ESIS_PDU_ISH, "ISH"},
1008 { 0, NULL }
1009 };
1010
1011 struct esis_header_t {
1012 uint8_t nlpid;
1013 uint8_t length_indicator;
1014 uint8_t version;
1015 uint8_t reserved;
1016 uint8_t type;
1017 uint8_t holdtime[2];
1018 uint8_t cksum[2];
1019 };
1020
1021 static void
esis_print(netdissect_options * ndo,const uint8_t * pptr,u_int length)1022 esis_print(netdissect_options *ndo,
1023 const uint8_t *pptr, u_int length)
1024 {
1025 const uint8_t *optr;
1026 u_int li,esis_pdu_type,source_address_length, source_address_number;
1027 const struct esis_header_t *esis_header;
1028
1029 if (!ndo->ndo_eflag)
1030 ND_PRINT((ndo, "ES-IS"));
1031
1032 if (length <= 2) {
1033 ND_PRINT((ndo, ndo->ndo_qflag ? "bad pkt!" : "no header at all!"));
1034 return;
1035 }
1036
1037 esis_header = (const struct esis_header_t *) pptr;
1038 ND_TCHECK(*esis_header);
1039 li = esis_header->length_indicator;
1040 optr = pptr;
1041
1042 /*
1043 * Sanity checking of the header.
1044 */
1045
1046 if (esis_header->nlpid != NLPID_ESIS) {
1047 ND_PRINT((ndo, " nlpid 0x%02x packet not supported", esis_header->nlpid));
1048 return;
1049 }
1050
1051 if (esis_header->version != ESIS_VERSION) {
1052 ND_PRINT((ndo, " version %d packet not supported", esis_header->version));
1053 return;
1054 }
1055
1056 if (li > length) {
1057 ND_PRINT((ndo, " length indicator(%d) > PDU size (%d)!", li, length));
1058 return;
1059 }
1060
1061 if (li < sizeof(struct esis_header_t) + 2) {
1062 ND_PRINT((ndo, " length indicator < min PDU size %d:", li));
1063 while (pptr < ndo->ndo_snapend)
1064 ND_PRINT((ndo, "%02X", *pptr++));
1065 return;
1066 }
1067
1068 esis_pdu_type = esis_header->type & ESIS_PDU_TYPE_MASK;
1069
1070 if (ndo->ndo_vflag < 1) {
1071 ND_PRINT((ndo, "%s%s, length %u",
1072 ndo->ndo_eflag ? "" : ", ",
1073 tok2str(esis_pdu_values,"unknown type (%u)",esis_pdu_type),
1074 length));
1075 return;
1076 } else
1077 ND_PRINT((ndo, "%slength %u\n\t%s (%u)",
1078 ndo->ndo_eflag ? "" : ", ",
1079 length,
1080 tok2str(esis_pdu_values,"unknown type: %u", esis_pdu_type),
1081 esis_pdu_type));
1082
1083 ND_PRINT((ndo, ", v: %u%s", esis_header->version, esis_header->version == ESIS_VERSION ? "" : "unsupported" ));
1084 ND_PRINT((ndo, ", checksum: 0x%04x", EXTRACT_16BITS(esis_header->cksum)));
1085
1086 osi_print_cksum(ndo, pptr, EXTRACT_16BITS(esis_header->cksum), 7, li);
1087
1088 ND_PRINT((ndo, ", holding time: %us, length indicator: %u",
1089 EXTRACT_16BITS(esis_header->holdtime), li));
1090
1091 if (ndo->ndo_vflag > 1)
1092 print_unknown_data(ndo, optr, "\n\t", sizeof(struct esis_header_t));
1093
1094 pptr += sizeof(struct esis_header_t);
1095 li -= sizeof(struct esis_header_t);
1096
1097 switch (esis_pdu_type) {
1098 case ESIS_PDU_REDIRECT: {
1099 const uint8_t *dst, *snpa, *neta;
1100 u_int dstl, snpal, netal;
1101
1102 ND_TCHECK(*pptr);
1103 if (li < 1) {
1104 ND_PRINT((ndo, ", bad redirect/li"));
1105 return;
1106 }
1107 dstl = *pptr;
1108 pptr++;
1109 li--;
1110 ND_TCHECK2(*pptr, dstl);
1111 if (li < dstl) {
1112 ND_PRINT((ndo, ", bad redirect/li"));
1113 return;
1114 }
1115 dst = pptr;
1116 pptr += dstl;
1117 li -= dstl;
1118 ND_PRINT((ndo, "\n\t %s", isonsap_string(dst, dstl)));
1119
1120 ND_TCHECK(*pptr);
1121 if (li < 1) {
1122 ND_PRINT((ndo, ", bad redirect/li"));
1123 return;
1124 }
1125 snpal = *pptr;
1126 pptr++;
1127 li--;
1128 ND_TCHECK2(*pptr, snpal);
1129 if (li < snpal) {
1130 ND_PRINT((ndo, ", bad redirect/li"));
1131 return;
1132 }
1133 snpa = pptr;
1134 pptr += snpal;
1135 li -= snpal;
1136 ND_TCHECK(*pptr);
1137 if (li < 1) {
1138 ND_PRINT((ndo, ", bad redirect/li"));
1139 return;
1140 }
1141 netal = *pptr;
1142 pptr++;
1143 ND_TCHECK2(*pptr, netal);
1144 if (li < netal) {
1145 ND_PRINT((ndo, ", bad redirect/li"));
1146 return;
1147 }
1148 neta = pptr;
1149 pptr += netal;
1150 li -= netal;
1151
1152 if (netal == 0)
1153 ND_PRINT((ndo, "\n\t %s", etheraddr_string(ndo, snpa)));
1154 else
1155 ND_PRINT((ndo, "\n\t %s", isonsap_string(neta, netal)));
1156 break;
1157 }
1158
1159 case ESIS_PDU_ESH:
1160 ND_TCHECK(*pptr);
1161 if (li < 1) {
1162 ND_PRINT((ndo, ", bad esh/li"));
1163 return;
1164 }
1165 source_address_number = *pptr;
1166 pptr++;
1167 li--;
1168
1169 ND_PRINT((ndo, "\n\t Number of Source Addresses: %u", source_address_number));
1170
1171 while (source_address_number > 0) {
1172 ND_TCHECK(*pptr);
1173 if (li < 1) {
1174 ND_PRINT((ndo, ", bad esh/li"));
1175 return;
1176 }
1177 source_address_length = *pptr;
1178 pptr++;
1179 li--;
1180
1181 ND_TCHECK2(*pptr, source_address_length);
1182 if (li < source_address_length) {
1183 ND_PRINT((ndo, ", bad esh/li"));
1184 return;
1185 }
1186 ND_PRINT((ndo, "\n\t NET (length: %u): %s",
1187 source_address_length,
1188 isonsap_string(pptr, source_address_length)));
1189 pptr += source_address_length;
1190 li -= source_address_length;
1191 source_address_number--;
1192 }
1193
1194 break;
1195
1196 case ESIS_PDU_ISH: {
1197 ND_TCHECK(*pptr);
1198 if (li < 1) {
1199 ND_PRINT((ndo, ", bad ish/li"));
1200 return;
1201 }
1202 source_address_length = *pptr;
1203 pptr++;
1204 li--;
1205 ND_TCHECK2(*pptr, source_address_length);
1206 if (li < source_address_length) {
1207 ND_PRINT((ndo, ", bad ish/li"));
1208 return;
1209 }
1210 ND_PRINT((ndo, "\n\t NET (length: %u): %s", source_address_length, isonsap_string(pptr, source_address_length)));
1211 pptr += source_address_length;
1212 li -= source_address_length;
1213 break;
1214 }
1215
1216 default:
1217 if (ndo->ndo_vflag <= 1) {
1218 if (pptr < ndo->ndo_snapend)
1219 print_unknown_data(ndo, pptr, "\n\t ", ndo->ndo_snapend - pptr);
1220 }
1221 return;
1222 }
1223
1224 /* now walk the options */
1225 while (li != 0) {
1226 u_int op, opli;
1227 const uint8_t *tptr;
1228
1229 if (li < 2) {
1230 ND_PRINT((ndo, ", bad opts/li"));
1231 return;
1232 }
1233 ND_TCHECK2(*pptr, 2);
1234 op = *pptr++;
1235 opli = *pptr++;
1236 li -= 2;
1237 if (opli > li) {
1238 ND_PRINT((ndo, ", opt (%d) too long", op));
1239 return;
1240 }
1241 li -= opli;
1242 tptr = pptr;
1243
1244 ND_PRINT((ndo, "\n\t %s Option #%u, length %u, value: ",
1245 tok2str(esis_option_values,"Unknown",op),
1246 op,
1247 opli));
1248
1249 switch (op) {
1250
1251 case ESIS_OPTION_ES_CONF_TIME:
1252 if (opli == 2) {
1253 ND_TCHECK2(*pptr, 2);
1254 ND_PRINT((ndo, "%us", EXTRACT_16BITS(tptr)));
1255 } else
1256 ND_PRINT((ndo, "(bad length)"));
1257 break;
1258
1259 case ESIS_OPTION_PROTOCOLS:
1260 while (opli>0) {
1261 ND_TCHECK(*pptr);
1262 ND_PRINT((ndo, "%s (0x%02x)",
1263 tok2str(nlpid_values,
1264 "unknown",
1265 *tptr),
1266 *tptr));
1267 if (opli>1) /* further NPLIDs ? - put comma */
1268 ND_PRINT((ndo, ", "));
1269 tptr++;
1270 opli--;
1271 }
1272 break;
1273
1274 /*
1275 * FIXME those are the defined Options that lack a decoder
1276 * you are welcome to contribute code ;-)
1277 */
1278
1279 case ESIS_OPTION_QOS_MAINTENANCE:
1280 case ESIS_OPTION_SECURITY:
1281 case ESIS_OPTION_PRIORITY:
1282 case ESIS_OPTION_ADDRESS_MASK:
1283 case ESIS_OPTION_SNPA_MASK:
1284
1285 default:
1286 print_unknown_data(ndo, tptr, "\n\t ", opli);
1287 break;
1288 }
1289 if (ndo->ndo_vflag > 1)
1290 print_unknown_data(ndo, pptr, "\n\t ", opli);
1291 pptr += opli;
1292 }
1293 trunc:
1294 return;
1295 }
1296
1297 static void
isis_print_mcid(netdissect_options * ndo,const struct isis_spb_mcid * mcid)1298 isis_print_mcid(netdissect_options *ndo,
1299 const struct isis_spb_mcid *mcid)
1300 {
1301 int i;
1302
1303 ND_PRINT((ndo, "ID: %d, Name: ", mcid->format_id));
1304
1305 for(i=0; i<32; i++)
1306 {
1307 ND_PRINT((ndo, "%c", mcid->name[i]));
1308 if(mcid->name[i] == '\0')
1309 break;
1310 }
1311
1312 ND_PRINT((ndo, "\n\t Lvl: %d", EXTRACT_16BITS(mcid->revision_lvl)));
1313
1314 ND_PRINT((ndo, ", Digest: "));
1315
1316 for(i=0;i<16;i++)
1317 ND_PRINT((ndo, "%.2x ", mcid->digest[i]));
1318 }
1319
1320 static int
isis_print_mt_port_cap_subtlv(netdissect_options * ndo,const uint8_t * tptr,int len)1321 isis_print_mt_port_cap_subtlv(netdissect_options *ndo,
1322 const uint8_t *tptr, int len)
1323 {
1324 int stlv_type, stlv_len;
1325 const struct isis_subtlv_spb_mcid *subtlv_spb_mcid;
1326 int i;
1327
1328 while (len > 0)
1329 {
1330 stlv_type = *(tptr++);
1331 stlv_len = *(tptr++);
1332
1333 /* first lets see if we know the subTLVs name*/
1334 ND_PRINT((ndo, "\n\t %s subTLV #%u, length: %u",
1335 tok2str(isis_mt_port_cap_subtlv_values, "unknown", stlv_type),
1336 stlv_type,
1337 stlv_len));
1338
1339 /*len -= TLV_TYPE_LEN_OFFSET;*/
1340 len = len -2;
1341
1342 switch (stlv_type)
1343 {
1344 case ISIS_SUBTLV_SPB_MCID:
1345 {
1346 if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_MCID_MIN_LEN))
1347 goto trunctlv;
1348
1349 subtlv_spb_mcid = (struct isis_subtlv_spb_mcid *)tptr;
1350
1351 ND_PRINT((ndo, "\n\t MCID: "));
1352 isis_print_mcid(ndo, &(subtlv_spb_mcid->mcid));
1353
1354 /*tptr += SPB_MCID_MIN_LEN;
1355 len -= SPB_MCID_MIN_LEN; */
1356
1357 ND_PRINT((ndo, "\n\t AUX-MCID: "));
1358 isis_print_mcid(ndo, &(subtlv_spb_mcid->aux_mcid));
1359
1360 /*tptr += SPB_MCID_MIN_LEN;
1361 len -= SPB_MCID_MIN_LEN; */
1362 tptr = tptr + sizeof(struct isis_subtlv_spb_mcid);
1363 len = len - sizeof(struct isis_subtlv_spb_mcid);
1364
1365 break;
1366 }
1367
1368 case ISIS_SUBTLV_SPB_DIGEST:
1369 {
1370 if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_DIGEST_MIN_LEN))
1371 goto trunctlv;
1372
1373 ND_PRINT((ndo, "\n\t RES: %d V: %d A: %d D: %d",
1374 (*(tptr) >> 5), (((*tptr)>> 4) & 0x01),
1375 ((*(tptr) >> 2) & 0x03), ((*tptr) & 0x03)));
1376
1377 tptr++;
1378
1379 ND_PRINT((ndo, "\n\t Digest: "));
1380
1381 for(i=1;i<=8; i++)
1382 {
1383 ND_PRINT((ndo, "%08x ", EXTRACT_32BITS(tptr)));
1384 if (i%4 == 0 && i != 8)
1385 ND_PRINT((ndo, "\n\t "));
1386 tptr = tptr + 4;
1387 }
1388
1389 len = len - ISIS_SUBTLV_SPB_DIGEST_MIN_LEN;
1390
1391 break;
1392 }
1393
1394 case ISIS_SUBTLV_SPB_BVID:
1395 {
1396 if (!ND_TTEST2(*(tptr), stlv_len))
1397 goto trunctlv;
1398
1399 while (len)
1400 {
1401 if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_BVID_MIN_LEN))
1402 goto trunctlv;
1403
1404 ND_PRINT((ndo, "\n\t ECT: %08x",
1405 EXTRACT_32BITS(tptr)));
1406
1407 tptr = tptr+4;
1408
1409 ND_PRINT((ndo, " BVID: %d, U:%01x M:%01x ",
1410 (EXTRACT_16BITS (tptr) >> 4) ,
1411 (EXTRACT_16BITS (tptr) >> 3) & 0x01,
1412 (EXTRACT_16BITS (tptr) >> 2) & 0x01));
1413
1414 tptr = tptr + 2;
1415 len = len - ISIS_SUBTLV_SPB_BVID_MIN_LEN;
1416 }
1417
1418 break;
1419 }
1420
1421 default:
1422 break;
1423 }
1424 }
1425
1426 return 0;
1427
1428 trunctlv:
1429 ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
1430 return(1);
1431 }
1432
1433 static int
isis_print_mt_capability_subtlv(netdissect_options * ndo,const uint8_t * tptr,int len)1434 isis_print_mt_capability_subtlv(netdissect_options *ndo,
1435 const uint8_t *tptr, int len)
1436 {
1437 int stlv_type, stlv_len, tmp;
1438
1439 while (len > 0)
1440 {
1441 stlv_type = *(tptr++);
1442 stlv_len = *(tptr++);
1443
1444 /* first lets see if we know the subTLVs name*/
1445 ND_PRINT((ndo, "\n\t %s subTLV #%u, length: %u",
1446 tok2str(isis_mt_capability_subtlv_values, "unknown", stlv_type),
1447 stlv_type,
1448 stlv_len));
1449
1450 len = len - 2;
1451
1452 switch (stlv_type)
1453 {
1454 case ISIS_SUBTLV_SPB_INSTANCE:
1455
1456 if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN))
1457 goto trunctlv;
1458
1459 ND_PRINT((ndo, "\n\t CIST Root-ID: %08x", EXTRACT_32BITS(tptr)));
1460 tptr = tptr+4;
1461 ND_PRINT((ndo, " %08x", EXTRACT_32BITS(tptr)));
1462 tptr = tptr+4;
1463 ND_PRINT((ndo, ", Path Cost: %08x", EXTRACT_32BITS(tptr)));
1464 tptr = tptr+4;
1465 ND_PRINT((ndo, ", Prio: %d", EXTRACT_16BITS(tptr)));
1466 tptr = tptr + 2;
1467 ND_PRINT((ndo, "\n\t RES: %d",
1468 EXTRACT_16BITS(tptr) >> 5));
1469 ND_PRINT((ndo, ", V: %d",
1470 (EXTRACT_16BITS(tptr) >> 4) & 0x0001));
1471 ND_PRINT((ndo, ", SPSource-ID: %d",
1472 (EXTRACT_32BITS(tptr) & 0x000fffff)));
1473 tptr = tptr+4;
1474 ND_PRINT((ndo, ", No of Trees: %x", *(tptr)));
1475
1476 tmp = *(tptr++);
1477
1478 len = len - ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN;
1479
1480 while (tmp)
1481 {
1482 if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN))
1483 goto trunctlv;
1484
1485 ND_PRINT((ndo, "\n\t U:%d, M:%d, A:%d, RES:%d",
1486 *(tptr) >> 7, (*(tptr) >> 6) & 0x01,
1487 (*(tptr) >> 5) & 0x01, (*(tptr) & 0x1f)));
1488
1489 tptr++;
1490
1491 ND_PRINT((ndo, ", ECT: %08x", EXTRACT_32BITS(tptr)));
1492
1493 tptr = tptr + 4;
1494
1495 ND_PRINT((ndo, ", BVID: %d, SPVID: %d",
1496 (EXTRACT_24BITS(tptr) >> 12) & 0x000fff,
1497 EXTRACT_24BITS(tptr) & 0x000fff));
1498
1499 tptr = tptr + 3;
1500 len = len - ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN;
1501 tmp--;
1502 }
1503
1504 break;
1505
1506 case ISIS_SUBTLV_SPBM_SI:
1507
1508 if (!ND_TTEST2(*(tptr), 6))
1509 goto trunctlv;
1510
1511 ND_PRINT((ndo, "\n\t BMAC: %08x", EXTRACT_32BITS(tptr)));
1512 tptr = tptr+4;
1513 ND_PRINT((ndo, "%04x", EXTRACT_16BITS(tptr)));
1514 tptr = tptr+2;
1515
1516 ND_PRINT((ndo, ", RES: %d, VID: %d", EXTRACT_16BITS(tptr) >> 12,
1517 (EXTRACT_16BITS(tptr)) & 0x0fff));
1518
1519 tptr = tptr+2;
1520 len = len - 8;
1521 stlv_len = stlv_len - 8;
1522
1523 while (stlv_len)
1524 {
1525 ND_PRINT((ndo, "\n\t T: %d, R: %d, RES: %d, ISID: %d",
1526 (EXTRACT_32BITS(tptr) >> 31),
1527 (EXTRACT_32BITS(tptr) >> 30) & 0x01,
1528 (EXTRACT_32BITS(tptr) >> 24) & 0x03f,
1529 (EXTRACT_32BITS(tptr)) & 0x0ffffff));
1530
1531 tptr = tptr + 4;
1532 len = len - 4;
1533 stlv_len = stlv_len - 4;
1534 }
1535
1536 break;
1537
1538 default:
1539 break;
1540 }
1541 }
1542 return 0;
1543
1544 trunctlv:
1545 ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
1546 return(1);
1547 }
1548
1549 /* shared routine for printing system, node and lsp-ids */
1550 static char *
isis_print_id(const uint8_t * cp,int id_len)1551 isis_print_id(const uint8_t *cp, int id_len)
1552 {
1553 int i;
1554 static char id[sizeof("xxxx.xxxx.xxxx.yy-zz")];
1555 char *pos = id;
1556
1557 for (i = 1; i <= SYSTEM_ID_LEN; i++) {
1558 snprintf(pos, sizeof(id) - (pos - id), "%02x", *cp++);
1559 pos += strlen(pos);
1560 if (i == 2 || i == 4)
1561 *pos++ = '.';
1562 }
1563 if (id_len >= NODE_ID_LEN) {
1564 snprintf(pos, sizeof(id) - (pos - id), ".%02x", *cp++);
1565 pos += strlen(pos);
1566 }
1567 if (id_len == LSP_ID_LEN)
1568 snprintf(pos, sizeof(id) - (pos - id), "-%02x", *cp);
1569 return (id);
1570 }
1571
1572 /* print the 4-byte metric block which is common found in the old-style TLVs */
1573 static int
isis_print_metric_block(netdissect_options * ndo,const struct isis_metric_block * isis_metric_block)1574 isis_print_metric_block(netdissect_options *ndo,
1575 const struct isis_metric_block *isis_metric_block)
1576 {
1577 ND_PRINT((ndo, ", Default Metric: %d, %s",
1578 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_default),
1579 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_default) ? "External" : "Internal"));
1580 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_delay))
1581 ND_PRINT((ndo, "\n\t\t Delay Metric: %d, %s",
1582 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_delay),
1583 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_delay) ? "External" : "Internal"));
1584 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_expense))
1585 ND_PRINT((ndo, "\n\t\t Expense Metric: %d, %s",
1586 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_expense),
1587 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_expense) ? "External" : "Internal"));
1588 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_error))
1589 ND_PRINT((ndo, "\n\t\t Error Metric: %d, %s",
1590 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_error),
1591 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_error) ? "External" : "Internal"));
1592
1593 return(1); /* everything is ok */
1594 }
1595
1596 static int
isis_print_tlv_ip_reach(netdissect_options * ndo,const uint8_t * cp,const char * ident,int length)1597 isis_print_tlv_ip_reach(netdissect_options *ndo,
1598 const uint8_t *cp, const char *ident, int length)
1599 {
1600 int prefix_len;
1601 const struct isis_tlv_ip_reach *tlv_ip_reach;
1602
1603 tlv_ip_reach = (const struct isis_tlv_ip_reach *)cp;
1604
1605 while (length > 0) {
1606 if ((size_t)length < sizeof(*tlv_ip_reach)) {
1607 ND_PRINT((ndo, "short IPv4 Reachability (%d vs %lu)",
1608 length,
1609 (unsigned long)sizeof(*tlv_ip_reach)));
1610 return (0);
1611 }
1612
1613 if (!ND_TTEST(*tlv_ip_reach))
1614 return (0);
1615
1616 prefix_len = mask2plen(EXTRACT_32BITS(tlv_ip_reach->mask));
1617
1618 if (prefix_len == -1)
1619 ND_PRINT((ndo, "%sIPv4 prefix: %s mask %s",
1620 ident,
1621 ipaddr_string(ndo, (tlv_ip_reach->prefix)),
1622 ipaddr_string(ndo, (tlv_ip_reach->mask))));
1623 else
1624 ND_PRINT((ndo, "%sIPv4 prefix: %15s/%u",
1625 ident,
1626 ipaddr_string(ndo, (tlv_ip_reach->prefix)),
1627 prefix_len));
1628
1629 ND_PRINT((ndo, ", Distribution: %s, Metric: %u, %s",
1630 ISIS_LSP_TLV_METRIC_UPDOWN(tlv_ip_reach->isis_metric_block.metric_default) ? "down" : "up",
1631 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_default),
1632 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_default) ? "External" : "Internal"));
1633
1634 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_delay))
1635 ND_PRINT((ndo, "%s Delay Metric: %u, %s",
1636 ident,
1637 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_delay),
1638 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_delay) ? "External" : "Internal"));
1639
1640 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_expense))
1641 ND_PRINT((ndo, "%s Expense Metric: %u, %s",
1642 ident,
1643 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_expense),
1644 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_expense) ? "External" : "Internal"));
1645
1646 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_error))
1647 ND_PRINT((ndo, "%s Error Metric: %u, %s",
1648 ident,
1649 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_error),
1650 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_error) ? "External" : "Internal"));
1651
1652 length -= sizeof(struct isis_tlv_ip_reach);
1653 tlv_ip_reach++;
1654 }
1655 return (1);
1656 }
1657
1658 /*
1659 * this is the common IP-REACH subTLV decoder it is called
1660 * from various EXTD-IP REACH TLVs (135,235,236,237)
1661 */
1662
1663 static int
isis_print_ip_reach_subtlv(netdissect_options * ndo,const uint8_t * tptr,int subt,int subl,const char * ident)1664 isis_print_ip_reach_subtlv(netdissect_options *ndo,
1665 const uint8_t *tptr, int subt, int subl,
1666 const char *ident)
1667 {
1668 /* first lets see if we know the subTLVs name*/
1669 ND_PRINT((ndo, "%s%s subTLV #%u, length: %u",
1670 ident, tok2str(isis_ext_ip_reach_subtlv_values, "unknown", subt),
1671 subt, subl));
1672
1673 if (!ND_TTEST2(*tptr,subl))
1674 goto trunctlv;
1675
1676 switch(subt) {
1677 case ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR: /* fall through */
1678 case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32:
1679 while (subl >= 4) {
1680 ND_PRINT((ndo, ", 0x%08x (=%u)",
1681 EXTRACT_32BITS(tptr),
1682 EXTRACT_32BITS(tptr)));
1683 tptr+=4;
1684 subl-=4;
1685 }
1686 break;
1687 case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64:
1688 while (subl >= 8) {
1689 ND_PRINT((ndo, ", 0x%08x%08x",
1690 EXTRACT_32BITS(tptr),
1691 EXTRACT_32BITS(tptr+4)));
1692 tptr+=8;
1693 subl-=8;
1694 }
1695 break;
1696 default:
1697 if (!print_unknown_data(ndo, tptr, "\n\t\t ", subl))
1698 return(0);
1699 break;
1700 }
1701 return(1);
1702
1703 trunctlv:
1704 ND_PRINT((ndo, "%spacket exceeded snapshot", ident));
1705 return(0);
1706 }
1707
1708 /*
1709 * this is the common IS-REACH subTLV decoder it is called
1710 * from isis_print_ext_is_reach()
1711 */
1712
1713 static int
isis_print_is_reach_subtlv(netdissect_options * ndo,const uint8_t * tptr,u_int subt,u_int subl,const char * ident)1714 isis_print_is_reach_subtlv(netdissect_options *ndo,
1715 const uint8_t *tptr, u_int subt, u_int subl,
1716 const char *ident)
1717 {
1718 u_int te_class,priority_level,gmpls_switch_cap;
1719 union { /* int to float conversion buffer for several subTLVs */
1720 float f;
1721 uint32_t i;
1722 } bw;
1723
1724 /* first lets see if we know the subTLVs name*/
1725 ND_PRINT((ndo, "%s%s subTLV #%u, length: %u",
1726 ident, tok2str(isis_ext_is_reach_subtlv_values, "unknown", subt),
1727 subt, subl));
1728
1729 if (!ND_TTEST2(*tptr,subl))
1730 goto trunctlv;
1731
1732 switch(subt) {
1733 case ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP:
1734 case ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID:
1735 case ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID:
1736 if (subl >= 4) {
1737 ND_PRINT((ndo, ", 0x%08x", EXTRACT_32BITS(tptr)));
1738 if (subl == 8) /* rfc4205 */
1739 ND_PRINT((ndo, ", 0x%08x", EXTRACT_32BITS(tptr+4)));
1740 }
1741 break;
1742 case ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR:
1743 case ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR:
1744 if (subl >= sizeof(struct in_addr))
1745 ND_PRINT((ndo, ", %s", ipaddr_string(ndo, tptr)));
1746 break;
1747 case ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW :
1748 case ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW:
1749 if (subl >= 4) {
1750 bw.i = EXTRACT_32BITS(tptr);
1751 ND_PRINT((ndo, ", %.3f Mbps", bw.f * 8 / 1000000));
1752 }
1753 break;
1754 case ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW :
1755 if (subl >= 32) {
1756 for (te_class = 0; te_class < 8; te_class++) {
1757 bw.i = EXTRACT_32BITS(tptr);
1758 ND_PRINT((ndo, "%s TE-Class %u: %.3f Mbps",
1759 ident,
1760 te_class,
1761 bw.f * 8 / 1000000));
1762 tptr+=4;
1763 }
1764 }
1765 break;
1766 case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS: /* fall through */
1767 case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD:
1768 ND_PRINT((ndo, "%sBandwidth Constraints Model ID: %s (%u)",
1769 ident,
1770 tok2str(diffserv_te_bc_values, "unknown", *tptr),
1771 *tptr));
1772 tptr++;
1773 /* decode BCs until the subTLV ends */
1774 for (te_class = 0; te_class < (subl-1)/4; te_class++) {
1775 bw.i = EXTRACT_32BITS(tptr);
1776 ND_PRINT((ndo, "%s Bandwidth constraint CT%u: %.3f Mbps",
1777 ident,
1778 te_class,
1779 bw.f * 8 / 1000000));
1780 tptr+=4;
1781 }
1782 break;
1783 case ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC:
1784 if (subl >= 3)
1785 ND_PRINT((ndo, ", %u", EXTRACT_24BITS(tptr)));
1786 break;
1787 case ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE:
1788 if (subl == 2) {
1789 ND_PRINT((ndo, ", [ %s ] (0x%04x)",
1790 bittok2str(isis_subtlv_link_attribute_values,
1791 "Unknown",
1792 EXTRACT_16BITS(tptr)),
1793 EXTRACT_16BITS(tptr)));
1794 }
1795 break;
1796 case ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE:
1797 if (subl >= 2) {
1798 ND_PRINT((ndo, ", %s, Priority %u",
1799 bittok2str(gmpls_link_prot_values, "none", *tptr),
1800 *(tptr+1)));
1801 }
1802 break;
1803 case ISIS_SUBTLV_SPB_METRIC:
1804 if (subl >= 6) {
1805 ND_PRINT((ndo, ", LM: %u", EXTRACT_24BITS(tptr)));
1806 tptr=tptr+3;
1807 ND_PRINT((ndo, ", P: %u", *(tptr)));
1808 tptr++;
1809 ND_PRINT((ndo, ", P-ID: %u", EXTRACT_16BITS(tptr)));
1810 }
1811 break;
1812 case ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR:
1813 if (subl >= 36) {
1814 gmpls_switch_cap = *tptr;
1815 ND_PRINT((ndo, "%s Interface Switching Capability:%s",
1816 ident,
1817 tok2str(gmpls_switch_cap_values, "Unknown", gmpls_switch_cap)));
1818 ND_PRINT((ndo, ", LSP Encoding: %s",
1819 tok2str(gmpls_encoding_values, "Unknown", *(tptr + 1))));
1820 tptr+=4;
1821 ND_PRINT((ndo, "%s Max LSP Bandwidth:", ident));
1822 for (priority_level = 0; priority_level < 8; priority_level++) {
1823 bw.i = EXTRACT_32BITS(tptr);
1824 ND_PRINT((ndo, "%s priority level %d: %.3f Mbps",
1825 ident,
1826 priority_level,
1827 bw.f * 8 / 1000000));
1828 tptr+=4;
1829 }
1830 subl-=36;
1831 switch (gmpls_switch_cap) {
1832 case GMPLS_PSC1:
1833 case GMPLS_PSC2:
1834 case GMPLS_PSC3:
1835 case GMPLS_PSC4:
1836 bw.i = EXTRACT_32BITS(tptr);
1837 ND_PRINT((ndo, "%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000));
1838 ND_PRINT((ndo, "%s Interface MTU: %u", ident, EXTRACT_16BITS(tptr + 4)));
1839 break;
1840 case GMPLS_TSC:
1841 bw.i = EXTRACT_32BITS(tptr);
1842 ND_PRINT((ndo, "%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000));
1843 ND_PRINT((ndo, "%s Indication %s", ident,
1844 tok2str(gmpls_switch_cap_tsc_indication_values, "Unknown (%u)", *(tptr + 4))));
1845 break;
1846 default:
1847 /* there is some optional stuff left to decode but this is as of yet
1848 not specified so just lets hexdump what is left */
1849 if(subl>0){
1850 if (!print_unknown_data(ndo, tptr, "\n\t\t ", subl))
1851 return(0);
1852 }
1853 }
1854 }
1855 break;
1856 default:
1857 if (!print_unknown_data(ndo, tptr, "\n\t\t ", subl))
1858 return(0);
1859 break;
1860 }
1861 return(1);
1862
1863 trunctlv:
1864 ND_PRINT((ndo, "%spacket exceeded snapshot", ident));
1865 return(0);
1866 }
1867
1868
1869 /*
1870 * this is the common IS-REACH decoder it is called
1871 * from various EXTD-IS REACH style TLVs (22,24,222)
1872 */
1873
1874 static int
isis_print_ext_is_reach(netdissect_options * ndo,const uint8_t * tptr,const char * ident,int tlv_type)1875 isis_print_ext_is_reach(netdissect_options *ndo,
1876 const uint8_t *tptr, const char *ident, int tlv_type)
1877 {
1878 char ident_buffer[20];
1879 int subtlv_type,subtlv_len,subtlv_sum_len;
1880 int proc_bytes = 0; /* how many bytes did we process ? */
1881
1882 if (!ND_TTEST2(*tptr, NODE_ID_LEN))
1883 return(0);
1884
1885 ND_PRINT((ndo, "%sIS Neighbor: %s", ident, isis_print_id(tptr, NODE_ID_LEN)));
1886 tptr+=(NODE_ID_LEN);
1887
1888 if (tlv_type != ISIS_TLV_IS_ALIAS_ID) { /* the Alias TLV Metric field is implicit 0 */
1889 if (!ND_TTEST2(*tptr, 3)) /* and is therefore skipped */
1890 return(0);
1891 ND_PRINT((ndo, ", Metric: %d", EXTRACT_24BITS(tptr)));
1892 tptr+=3;
1893 }
1894
1895 if (!ND_TTEST2(*tptr, 1))
1896 return(0);
1897 subtlv_sum_len=*(tptr++); /* read out subTLV length */
1898 proc_bytes=NODE_ID_LEN+3+1;
1899 ND_PRINT((ndo, ", %ssub-TLVs present",subtlv_sum_len ? "" : "no "));
1900 if (subtlv_sum_len) {
1901 ND_PRINT((ndo, " (%u)", subtlv_sum_len));
1902 while (subtlv_sum_len>0) {
1903 if (!ND_TTEST2(*tptr,2))
1904 return(0);
1905 subtlv_type=*(tptr++);
1906 subtlv_len=*(tptr++);
1907 /* prepend the ident string */
1908 snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident);
1909 if (!isis_print_is_reach_subtlv(ndo, tptr, subtlv_type, subtlv_len, ident_buffer))
1910 return(0);
1911 tptr+=subtlv_len;
1912 subtlv_sum_len-=(subtlv_len+2);
1913 proc_bytes+=(subtlv_len+2);
1914 }
1915 }
1916 return(proc_bytes);
1917 }
1918
1919 /*
1920 * this is the common Multi Topology ID decoder
1921 * it is called from various MT-TLVs (222,229,235,237)
1922 */
1923
1924 static int
isis_print_mtid(netdissect_options * ndo,const uint8_t * tptr,const char * ident)1925 isis_print_mtid(netdissect_options *ndo,
1926 const uint8_t *tptr, const char *ident)
1927 {
1928 if (!ND_TTEST2(*tptr, 2))
1929 return(0);
1930
1931 ND_PRINT((ndo, "%s%s",
1932 ident,
1933 tok2str(isis_mt_values,
1934 "Reserved for IETF Consensus",
1935 ISIS_MASK_MTID(EXTRACT_16BITS(tptr)))));
1936
1937 ND_PRINT((ndo, " Topology (0x%03x), Flags: [%s]",
1938 ISIS_MASK_MTID(EXTRACT_16BITS(tptr)),
1939 bittok2str(isis_mt_flag_values, "none",ISIS_MASK_MTFLAGS(EXTRACT_16BITS(tptr)))));
1940
1941 return(2);
1942 }
1943
1944 /*
1945 * this is the common extended IP reach decoder
1946 * it is called from TLVs (135,235,236,237)
1947 * we process the TLV and optional subTLVs and return
1948 * the amount of processed bytes
1949 */
1950
1951 static int
isis_print_extd_ip_reach(netdissect_options * ndo,const uint8_t * tptr,const char * ident,uint16_t afi)1952 isis_print_extd_ip_reach(netdissect_options *ndo,
1953 const uint8_t *tptr, const char *ident, uint16_t afi)
1954 {
1955 char ident_buffer[20];
1956 #ifdef INET6
1957 uint8_t prefix[sizeof(struct in6_addr)]; /* shared copy buffer for IPv4 and IPv6 prefixes */
1958 #else
1959 uint8_t prefix[sizeof(struct in_addr)]; /* shared copy buffer for IPv4 prefixes */
1960 #endif
1961 u_int metric, status_byte, bit_length, byte_length, sublen, processed, subtlvtype, subtlvlen;
1962
1963 if (!ND_TTEST2(*tptr, 4))
1964 return (0);
1965 metric = EXTRACT_32BITS(tptr);
1966 processed=4;
1967 tptr+=4;
1968
1969 if (afi == AF_INET) {
1970 if (!ND_TTEST2(*tptr, 1)) /* fetch status byte */
1971 return (0);
1972 status_byte=*(tptr++);
1973 bit_length = status_byte&0x3f;
1974 if (bit_length > 32) {
1975 ND_PRINT((ndo, "%sIPv4 prefix: bad bit length %u",
1976 ident,
1977 bit_length));
1978 return (0);
1979 }
1980 processed++;
1981 #ifdef INET6
1982 } else if (afi == AF_INET6) {
1983 if (!ND_TTEST2(*tptr, 1)) /* fetch status & prefix_len byte */
1984 return (0);
1985 status_byte=*(tptr++);
1986 bit_length=*(tptr++);
1987 if (bit_length > 128) {
1988 ND_PRINT((ndo, "%sIPv6 prefix: bad bit length %u",
1989 ident,
1990 bit_length));
1991 return (0);
1992 }
1993 processed+=2;
1994 #endif
1995 } else
1996 return (0); /* somebody is fooling us */
1997
1998 byte_length = (bit_length + 7) / 8; /* prefix has variable length encoding */
1999
2000 if (!ND_TTEST2(*tptr, byte_length))
2001 return (0);
2002 memset(prefix, 0, sizeof prefix); /* clear the copy buffer */
2003 memcpy(prefix,tptr,byte_length); /* copy as much as is stored in the TLV */
2004 tptr+=byte_length;
2005 processed+=byte_length;
2006
2007 if (afi == AF_INET)
2008 ND_PRINT((ndo, "%sIPv4 prefix: %15s/%u",
2009 ident,
2010 ipaddr_string(ndo, prefix),
2011 bit_length));
2012 #ifdef INET6
2013 if (afi == AF_INET6)
2014 ND_PRINT((ndo, "%sIPv6 prefix: %s/%u",
2015 ident,
2016 ip6addr_string(ndo, prefix),
2017 bit_length));
2018 #endif
2019
2020 ND_PRINT((ndo, ", Distribution: %s, Metric: %u",
2021 ISIS_MASK_TLV_EXTD_IP_UPDOWN(status_byte) ? "down" : "up",
2022 metric));
2023
2024 if (afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte))
2025 ND_PRINT((ndo, ", sub-TLVs present"));
2026 #ifdef INET6
2027 if (afi == AF_INET6)
2028 ND_PRINT((ndo, ", %s%s",
2029 ISIS_MASK_TLV_EXTD_IP6_IE(status_byte) ? "External" : "Internal",
2030 ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte) ? ", sub-TLVs present" : ""));
2031 #endif
2032
2033 if ((afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte))
2034 #ifdef INET6
2035 || (afi == AF_INET6 && ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte))
2036 #endif
2037 ) {
2038 /* assume that one prefix can hold more
2039 than one subTLV - therefore the first byte must reflect
2040 the aggregate bytecount of the subTLVs for this prefix
2041 */
2042 if (!ND_TTEST2(*tptr, 1))
2043 return (0);
2044 sublen=*(tptr++);
2045 processed+=sublen+1;
2046 ND_PRINT((ndo, " (%u)", sublen)); /* print out subTLV length */
2047
2048 while (sublen>0) {
2049 if (!ND_TTEST2(*tptr,2))
2050 return (0);
2051 subtlvtype=*(tptr++);
2052 subtlvlen=*(tptr++);
2053 /* prepend the ident string */
2054 snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident);
2055 if (!isis_print_ip_reach_subtlv(ndo, tptr, subtlvtype, subtlvlen, ident_buffer))
2056 return(0);
2057 tptr+=subtlvlen;
2058 sublen-=(subtlvlen+2);
2059 }
2060 }
2061 return (processed);
2062 }
2063
2064 /*
2065 * isis_print
2066 * Decode IS-IS packets. Return 0 on error.
2067 */
2068
2069 static int
isis_print(netdissect_options * ndo,const uint8_t * p,u_int length)2070 isis_print(netdissect_options *ndo,
2071 const uint8_t *p, u_int length)
2072 {
2073 const struct isis_common_header *isis_header;
2074
2075 const struct isis_iih_lan_header *header_iih_lan;
2076 const struct isis_iih_ptp_header *header_iih_ptp;
2077 struct isis_lsp_header *header_lsp;
2078 const struct isis_csnp_header *header_csnp;
2079 const struct isis_psnp_header *header_psnp;
2080
2081 const struct isis_tlv_lsp *tlv_lsp;
2082 const struct isis_tlv_ptp_adj *tlv_ptp_adj;
2083 const struct isis_tlv_is_reach *tlv_is_reach;
2084 const struct isis_tlv_es_reach *tlv_es_reach;
2085
2086 uint8_t pdu_type, max_area, id_length, tlv_type, tlv_len, tmp, alen, lan_alen, prefix_len;
2087 uint8_t ext_is_len, ext_ip_len, mt_len;
2088 const uint8_t *optr, *pptr, *tptr;
2089 u_short packet_len,pdu_len, key_id;
2090 u_int i,vendor_id;
2091 int sigcheck;
2092
2093 packet_len=length;
2094 optr = p; /* initialize the _o_riginal pointer to the packet start -
2095 need it for parsing the checksum TLV and authentication
2096 TLV verification */
2097 isis_header = (const struct isis_common_header *)p;
2098 ND_TCHECK(*isis_header);
2099 pptr = p+(ISIS_COMMON_HEADER_SIZE);
2100 header_iih_lan = (const struct isis_iih_lan_header *)pptr;
2101 header_iih_ptp = (const struct isis_iih_ptp_header *)pptr;
2102 header_lsp = (struct isis_lsp_header *)pptr;
2103 header_csnp = (const struct isis_csnp_header *)pptr;
2104 header_psnp = (const struct isis_psnp_header *)pptr;
2105
2106 if (!ndo->ndo_eflag)
2107 ND_PRINT((ndo, "IS-IS"));
2108
2109 /*
2110 * Sanity checking of the header.
2111 */
2112
2113 if (isis_header->version != ISIS_VERSION) {
2114 ND_PRINT((ndo, "version %d packet not supported", isis_header->version));
2115 return (0);
2116 }
2117
2118 if ((isis_header->id_length != SYSTEM_ID_LEN) && (isis_header->id_length != 0)) {
2119 ND_PRINT((ndo, "system ID length of %d is not supported",
2120 isis_header->id_length));
2121 return (0);
2122 }
2123
2124 if (isis_header->pdu_version != ISIS_VERSION) {
2125 ND_PRINT((ndo, "version %d packet not supported", isis_header->pdu_version));
2126 return (0);
2127 }
2128
2129 max_area = isis_header->max_area;
2130 switch(max_area) {
2131 case 0:
2132 max_area = 3; /* silly shit */
2133 break;
2134 case 255:
2135 ND_PRINT((ndo, "bad packet -- 255 areas"));
2136 return (0);
2137 default:
2138 break;
2139 }
2140
2141 id_length = isis_header->id_length;
2142 switch(id_length) {
2143 case 0:
2144 id_length = 6; /* silly shit again */
2145 break;
2146 case 1: /* 1-8 are valid sys-ID lenghts */
2147 case 2:
2148 case 3:
2149 case 4:
2150 case 5:
2151 case 6:
2152 case 7:
2153 case 8:
2154 break;
2155 case 255:
2156 id_length = 0; /* entirely useless */
2157 break;
2158 default:
2159 break;
2160 }
2161
2162 /* toss any non 6-byte sys-ID len PDUs */
2163 if (id_length != 6 ) {
2164 ND_PRINT((ndo, "bad packet -- illegal sys-ID length (%u)", id_length));
2165 return (0);
2166 }
2167
2168 pdu_type=isis_header->pdu_type;
2169
2170 /* in non-verbose mode print the basic PDU Type plus PDU specific brief information*/
2171 if (ndo->ndo_vflag < 1) {
2172 ND_PRINT((ndo, "%s%s",
2173 ndo->ndo_eflag ? "" : ", ",
2174 tok2str(isis_pdu_values, "unknown PDU-Type %u", pdu_type)));
2175
2176 switch (pdu_type) {
2177
2178 case ISIS_PDU_L1_LAN_IIH:
2179 case ISIS_PDU_L2_LAN_IIH:
2180 ND_PRINT((ndo, ", src-id %s",
2181 isis_print_id(header_iih_lan->source_id, SYSTEM_ID_LEN)));
2182 ND_PRINT((ndo, ", lan-id %s, prio %u",
2183 isis_print_id(header_iih_lan->lan_id,NODE_ID_LEN),
2184 header_iih_lan->priority));
2185 break;
2186 case ISIS_PDU_PTP_IIH:
2187 ND_PRINT((ndo, ", src-id %s", isis_print_id(header_iih_ptp->source_id, SYSTEM_ID_LEN)));
2188 break;
2189 case ISIS_PDU_L1_LSP:
2190 case ISIS_PDU_L2_LSP:
2191 ND_PRINT((ndo, ", lsp-id %s, seq 0x%08x, lifetime %5us",
2192 isis_print_id(header_lsp->lsp_id, LSP_ID_LEN),
2193 EXTRACT_32BITS(header_lsp->sequence_number),
2194 EXTRACT_16BITS(header_lsp->remaining_lifetime)));
2195 break;
2196 case ISIS_PDU_L1_CSNP:
2197 case ISIS_PDU_L2_CSNP:
2198 ND_PRINT((ndo, ", src-id %s", isis_print_id(header_csnp->source_id, NODE_ID_LEN)));
2199 break;
2200 case ISIS_PDU_L1_PSNP:
2201 case ISIS_PDU_L2_PSNP:
2202 ND_PRINT((ndo, ", src-id %s", isis_print_id(header_psnp->source_id, NODE_ID_LEN)));
2203 break;
2204
2205 }
2206 ND_PRINT((ndo, ", length %u", length));
2207
2208 return(1);
2209 }
2210
2211 /* ok they seem to want to know everything - lets fully decode it */
2212 ND_PRINT((ndo, "%slength %u", ndo->ndo_eflag ? "" : ", ", length));
2213
2214 ND_PRINT((ndo, "\n\t%s, hlen: %u, v: %u, pdu-v: %u, sys-id-len: %u (%u), max-area: %u (%u)",
2215 tok2str(isis_pdu_values,
2216 "unknown, type %u",
2217 pdu_type),
2218 isis_header->fixed_len,
2219 isis_header->version,
2220 isis_header->pdu_version,
2221 id_length,
2222 isis_header->id_length,
2223 max_area,
2224 isis_header->max_area));
2225
2226 if (ndo->ndo_vflag > 1) {
2227 if (!print_unknown_data(ndo, optr, "\n\t", 8)) /* provide the _o_riginal pointer */
2228 return(0); /* for optionally debugging the common header */
2229 }
2230
2231 switch (pdu_type) {
2232
2233 case ISIS_PDU_L1_LAN_IIH:
2234 case ISIS_PDU_L2_LAN_IIH:
2235 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) {
2236 ND_PRINT((ndo, ", bogus fixed header length %u should be %lu",
2237 isis_header->fixed_len, (unsigned long)ISIS_IIH_LAN_HEADER_SIZE));
2238 return (0);
2239 }
2240
2241 pdu_len=EXTRACT_16BITS(header_iih_lan->pdu_len);
2242 if (packet_len>pdu_len) {
2243 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2244 length=pdu_len;
2245 }
2246
2247 ND_TCHECK(*header_iih_lan);
2248 ND_PRINT((ndo, "\n\t source-id: %s, holding time: %us, Flags: [%s]",
2249 isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN),
2250 EXTRACT_16BITS(header_iih_lan->holding_time),
2251 tok2str(isis_iih_circuit_type_values,
2252 "unknown circuit type 0x%02x",
2253 header_iih_lan->circuit_type)));
2254
2255 ND_PRINT((ndo, "\n\t lan-id: %s, Priority: %u, PDU length: %u",
2256 isis_print_id(header_iih_lan->lan_id, NODE_ID_LEN),
2257 (header_iih_lan->priority) & ISIS_LAN_PRIORITY_MASK,
2258 pdu_len));
2259
2260 if (ndo->ndo_vflag > 1) {
2261 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_IIH_LAN_HEADER_SIZE))
2262 return(0);
2263 }
2264
2265 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
2266 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
2267 break;
2268
2269 case ISIS_PDU_PTP_IIH:
2270 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) {
2271 ND_PRINT((ndo, ", bogus fixed header length %u should be %lu",
2272 isis_header->fixed_len, (unsigned long)ISIS_IIH_PTP_HEADER_SIZE));
2273 return (0);
2274 }
2275
2276 pdu_len=EXTRACT_16BITS(header_iih_ptp->pdu_len);
2277 if (packet_len>pdu_len) {
2278 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2279 length=pdu_len;
2280 }
2281
2282 ND_TCHECK(*header_iih_ptp);
2283 ND_PRINT((ndo, "\n\t source-id: %s, holding time: %us, Flags: [%s]",
2284 isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN),
2285 EXTRACT_16BITS(header_iih_ptp->holding_time),
2286 tok2str(isis_iih_circuit_type_values,
2287 "unknown circuit type 0x%02x",
2288 header_iih_ptp->circuit_type)));
2289
2290 ND_PRINT((ndo, "\n\t circuit-id: 0x%02x, PDU length: %u",
2291 header_iih_ptp->circuit_id,
2292 pdu_len));
2293
2294 if (ndo->ndo_vflag > 1) {
2295 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_IIH_PTP_HEADER_SIZE))
2296 return(0);
2297 }
2298
2299 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
2300 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
2301 break;
2302
2303 case ISIS_PDU_L1_LSP:
2304 case ISIS_PDU_L2_LSP:
2305 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) {
2306 ND_PRINT((ndo, ", bogus fixed header length %u should be %lu",
2307 isis_header->fixed_len, (unsigned long)ISIS_LSP_HEADER_SIZE));
2308 return (0);
2309 }
2310
2311 pdu_len=EXTRACT_16BITS(header_lsp->pdu_len);
2312 if (packet_len>pdu_len) {
2313 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2314 length=pdu_len;
2315 }
2316
2317 ND_TCHECK(*header_lsp);
2318 ND_PRINT((ndo, "\n\t lsp-id: %s, seq: 0x%08x, lifetime: %5us\n\t chksum: 0x%04x",
2319 isis_print_id(header_lsp->lsp_id, LSP_ID_LEN),
2320 EXTRACT_32BITS(header_lsp->sequence_number),
2321 EXTRACT_16BITS(header_lsp->remaining_lifetime),
2322 EXTRACT_16BITS(header_lsp->checksum)));
2323
2324
2325 osi_print_cksum(ndo, (uint8_t *)header_lsp->lsp_id,
2326 EXTRACT_16BITS(header_lsp->checksum), 12, length-12);
2327
2328 /*
2329 * Clear checksum and lifetime prior to signature verification.
2330 */
2331 header_lsp->checksum[0] = 0;
2332 header_lsp->checksum[1] = 0;
2333 header_lsp->remaining_lifetime[0] = 0;
2334 header_lsp->remaining_lifetime[1] = 0;
2335
2336
2337 ND_PRINT((ndo, ", PDU length: %u, Flags: [ %s",
2338 pdu_len,
2339 ISIS_MASK_LSP_OL_BIT(header_lsp->typeblock) ? "Overload bit set, " : ""));
2340
2341 if (ISIS_MASK_LSP_ATT_BITS(header_lsp->typeblock)) {
2342 ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : ""));
2343 ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : ""));
2344 ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : ""));
2345 ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : ""));
2346 ND_PRINT((ndo, "ATT bit set, "));
2347 }
2348 ND_PRINT((ndo, "%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : ""));
2349 ND_PRINT((ndo, "%s ]", tok2str(isis_lsp_istype_values, "Unknown(0x%x)",
2350 ISIS_MASK_LSP_ISTYPE_BITS(header_lsp->typeblock))));
2351
2352 if (ndo->ndo_vflag > 1) {
2353 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_LSP_HEADER_SIZE))
2354 return(0);
2355 }
2356
2357 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
2358 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
2359 break;
2360
2361 case ISIS_PDU_L1_CSNP:
2362 case ISIS_PDU_L2_CSNP:
2363 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) {
2364 ND_PRINT((ndo, ", bogus fixed header length %u should be %lu",
2365 isis_header->fixed_len, (unsigned long)ISIS_CSNP_HEADER_SIZE));
2366 return (0);
2367 }
2368
2369 pdu_len=EXTRACT_16BITS(header_csnp->pdu_len);
2370 if (packet_len>pdu_len) {
2371 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2372 length=pdu_len;
2373 }
2374
2375 ND_TCHECK(*header_csnp);
2376 ND_PRINT((ndo, "\n\t source-id: %s, PDU length: %u",
2377 isis_print_id(header_csnp->source_id, NODE_ID_LEN),
2378 pdu_len));
2379 ND_PRINT((ndo, "\n\t start lsp-id: %s",
2380 isis_print_id(header_csnp->start_lsp_id, LSP_ID_LEN)));
2381 ND_PRINT((ndo, "\n\t end lsp-id: %s",
2382 isis_print_id(header_csnp->end_lsp_id, LSP_ID_LEN)));
2383
2384 if (ndo->ndo_vflag > 1) {
2385 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_CSNP_HEADER_SIZE))
2386 return(0);
2387 }
2388
2389 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
2390 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
2391 break;
2392
2393 case ISIS_PDU_L1_PSNP:
2394 case ISIS_PDU_L2_PSNP:
2395 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) {
2396 ND_PRINT((ndo, "- bogus fixed header length %u should be %lu",
2397 isis_header->fixed_len, (unsigned long)ISIS_PSNP_HEADER_SIZE));
2398 return (0);
2399 }
2400
2401 pdu_len=EXTRACT_16BITS(header_psnp->pdu_len);
2402 if (packet_len>pdu_len) {
2403 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2404 length=pdu_len;
2405 }
2406
2407 ND_TCHECK(*header_psnp);
2408 ND_PRINT((ndo, "\n\t source-id: %s, PDU length: %u",
2409 isis_print_id(header_psnp->source_id, NODE_ID_LEN),
2410 pdu_len));
2411
2412 if (ndo->ndo_vflag > 1) {
2413 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_PSNP_HEADER_SIZE))
2414 return(0);
2415 }
2416
2417 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
2418 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
2419 break;
2420
2421 default:
2422 (void)print_unknown_data(ndo, pptr, "\n\t ", length);
2423 return (0);
2424 }
2425
2426 /*
2427 * Now print the TLV's.
2428 */
2429
2430 while (packet_len >= 2) {
2431 if (pptr == ndo->ndo_snapend) {
2432 return (1);
2433 }
2434
2435 if (!ND_TTEST2(*pptr, 2)) {
2436 ND_PRINT((ndo, "\n\t\t packet exceeded snapshot (%ld) bytes",
2437 (long)(pptr - ndo->ndo_snapend)));
2438 return (1);
2439 }
2440 tlv_type = *pptr++;
2441 tlv_len = *pptr++;
2442 tmp =tlv_len; /* copy temporary len & pointer to packet data */
2443 tptr = pptr;
2444 packet_len -= 2;
2445 if (tlv_len > packet_len) {
2446 break;
2447 }
2448
2449 /* first lets see if we know the TLVs name*/
2450 ND_PRINT((ndo, "\n\t %s TLV #%u, length: %u",
2451 tok2str(isis_tlv_values,
2452 "unknown",
2453 tlv_type),
2454 tlv_type,
2455 tlv_len));
2456
2457 if (tlv_len == 0) /* something is malformed */
2458 continue;
2459
2460 /* now check if we have a decoder otherwise do a hexdump at the end*/
2461 switch (tlv_type) {
2462 case ISIS_TLV_AREA_ADDR:
2463 if (!ND_TTEST2(*tptr, 1))
2464 goto trunctlv;
2465 alen = *tptr++;
2466 while (tmp && alen < tmp) {
2467 ND_PRINT((ndo, "\n\t Area address (length: %u): %s",
2468 alen,
2469 isonsap_string(tptr, alen)));
2470 tptr += alen;
2471 tmp -= alen + 1;
2472 if (tmp==0) /* if this is the last area address do not attemt a boundary check */
2473 break;
2474 if (!ND_TTEST2(*tptr, 1))
2475 goto trunctlv;
2476 alen = *tptr++;
2477 }
2478 break;
2479 case ISIS_TLV_ISNEIGH:
2480 while (tmp >= ETHER_ADDR_LEN) {
2481 if (!ND_TTEST2(*tptr, ETHER_ADDR_LEN))
2482 goto trunctlv;
2483 ND_PRINT((ndo, "\n\t SNPA: %s", isis_print_id(tptr, ETHER_ADDR_LEN)));
2484 tmp -= ETHER_ADDR_LEN;
2485 tptr += ETHER_ADDR_LEN;
2486 }
2487 break;
2488
2489 case ISIS_TLV_ISNEIGH_VARLEN:
2490 if (!ND_TTEST2(*tptr, 1) || tmp < 3) /* min. TLV length */
2491 goto trunctlv;
2492 lan_alen = *tptr++; /* LAN address length */
2493 if (lan_alen == 0) {
2494 ND_PRINT((ndo, "\n\t LAN address length 0 bytes (invalid)"));
2495 break;
2496 }
2497 tmp --;
2498 ND_PRINT((ndo, "\n\t LAN address length %u bytes ", lan_alen));
2499 while (tmp >= lan_alen) {
2500 if (!ND_TTEST2(*tptr, lan_alen))
2501 goto trunctlv;
2502 ND_PRINT((ndo, "\n\t\tIS Neighbor: %s", isis_print_id(tptr, lan_alen)));
2503 tmp -= lan_alen;
2504 tptr +=lan_alen;
2505 }
2506 break;
2507
2508 case ISIS_TLV_PADDING:
2509 break;
2510
2511 case ISIS_TLV_MT_IS_REACH:
2512 mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
2513 if (mt_len == 0) /* did something go wrong ? */
2514 goto trunctlv;
2515 tptr+=mt_len;
2516 tmp-=mt_len;
2517 while (tmp >= 2+NODE_ID_LEN+3+1) {
2518 ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type);
2519 if (ext_is_len == 0) /* did something go wrong ? */
2520 goto trunctlv;
2521
2522 tmp-=ext_is_len;
2523 tptr+=ext_is_len;
2524 }
2525 break;
2526
2527 case ISIS_TLV_IS_ALIAS_ID:
2528 while (tmp >= NODE_ID_LEN+1) { /* is it worth attempting a decode ? */
2529 ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type);
2530 if (ext_is_len == 0) /* did something go wrong ? */
2531 goto trunctlv;
2532 tmp-=ext_is_len;
2533 tptr+=ext_is_len;
2534 }
2535 break;
2536
2537 case ISIS_TLV_EXT_IS_REACH:
2538 while (tmp >= NODE_ID_LEN+3+1) { /* is it worth attempting a decode ? */
2539 ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type);
2540 if (ext_is_len == 0) /* did something go wrong ? */
2541 goto trunctlv;
2542 tmp-=ext_is_len;
2543 tptr+=ext_is_len;
2544 }
2545 break;
2546 case ISIS_TLV_IS_REACH:
2547 if (!ND_TTEST2(*tptr,1)) /* check if there is one byte left to read out the virtual flag */
2548 goto trunctlv;
2549 ND_PRINT((ndo, "\n\t %s",
2550 tok2str(isis_is_reach_virtual_values,
2551 "bogus virtual flag 0x%02x",
2552 *tptr++)));
2553 tlv_is_reach = (const struct isis_tlv_is_reach *)tptr;
2554 while (tmp >= sizeof(struct isis_tlv_is_reach)) {
2555 if (!ND_TTEST(*tlv_is_reach))
2556 goto trunctlv;
2557 ND_PRINT((ndo, "\n\t IS Neighbor: %s",
2558 isis_print_id(tlv_is_reach->neighbor_nodeid, NODE_ID_LEN)));
2559 isis_print_metric_block(ndo, &tlv_is_reach->isis_metric_block);
2560 tmp -= sizeof(struct isis_tlv_is_reach);
2561 tlv_is_reach++;
2562 }
2563 break;
2564
2565 case ISIS_TLV_ESNEIGH:
2566 tlv_es_reach = (const struct isis_tlv_es_reach *)tptr;
2567 while (tmp >= sizeof(struct isis_tlv_es_reach)) {
2568 if (!ND_TTEST(*tlv_es_reach))
2569 goto trunctlv;
2570 ND_PRINT((ndo, "\n\t ES Neighbor: %s",
2571 isis_print_id(tlv_es_reach->neighbor_sysid, SYSTEM_ID_LEN)));
2572 isis_print_metric_block(ndo, &tlv_es_reach->isis_metric_block);
2573 tmp -= sizeof(struct isis_tlv_es_reach);
2574 tlv_es_reach++;
2575 }
2576 break;
2577
2578 /* those two TLVs share the same format */
2579 case ISIS_TLV_INT_IP_REACH:
2580 case ISIS_TLV_EXT_IP_REACH:
2581 if (!isis_print_tlv_ip_reach(ndo, pptr, "\n\t ", tlv_len))
2582 return (1);
2583 break;
2584
2585 case ISIS_TLV_EXTD_IP_REACH:
2586 while (tmp>0) {
2587 ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET);
2588 if (ext_ip_len == 0) /* did something go wrong ? */
2589 goto trunctlv;
2590 tptr+=ext_ip_len;
2591 tmp-=ext_ip_len;
2592 }
2593 break;
2594
2595 case ISIS_TLV_MT_IP_REACH:
2596 mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
2597 if (mt_len == 0) { /* did something go wrong ? */
2598 goto trunctlv;
2599 }
2600 tptr+=mt_len;
2601 tmp-=mt_len;
2602
2603 while (tmp>0) {
2604 ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET);
2605 if (ext_ip_len == 0) /* did something go wrong ? */
2606 goto trunctlv;
2607 tptr+=ext_ip_len;
2608 tmp-=ext_ip_len;
2609 }
2610 break;
2611
2612 #ifdef INET6
2613 case ISIS_TLV_IP6_REACH:
2614 while (tmp>0) {
2615 ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET6);
2616 if (ext_ip_len == 0) /* did something go wrong ? */
2617 goto trunctlv;
2618 tptr+=ext_ip_len;
2619 tmp-=ext_ip_len;
2620 }
2621 break;
2622
2623 case ISIS_TLV_MT_IP6_REACH:
2624 mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
2625 if (mt_len == 0) { /* did something go wrong ? */
2626 goto trunctlv;
2627 }
2628 tptr+=mt_len;
2629 tmp-=mt_len;
2630
2631 while (tmp>0) {
2632 ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET6);
2633 if (ext_ip_len == 0) /* did something go wrong ? */
2634 goto trunctlv;
2635 tptr+=ext_ip_len;
2636 tmp-=ext_ip_len;
2637 }
2638 break;
2639
2640 case ISIS_TLV_IP6ADDR:
2641 while (tmp>=sizeof(struct in6_addr)) {
2642 if (!ND_TTEST2(*tptr, sizeof(struct in6_addr)))
2643 goto trunctlv;
2644
2645 ND_PRINT((ndo, "\n\t IPv6 interface address: %s",
2646 ip6addr_string(ndo, tptr)));
2647
2648 tptr += sizeof(struct in6_addr);
2649 tmp -= sizeof(struct in6_addr);
2650 }
2651 break;
2652 #endif
2653 case ISIS_TLV_AUTH:
2654 if (!ND_TTEST2(*tptr, 1))
2655 goto trunctlv;
2656
2657 ND_PRINT((ndo, "\n\t %s: ",
2658 tok2str(isis_subtlv_auth_values,
2659 "unknown Authentication type 0x%02x",
2660 *tptr)));
2661
2662 switch (*tptr) {
2663 case ISIS_SUBTLV_AUTH_SIMPLE:
2664 for(i=1;i<tlv_len;i++) {
2665 if (!ND_TTEST2(*(tptr + i), 1))
2666 goto trunctlv;
2667 ND_PRINT((ndo, "%c", *(tptr + i)));
2668 }
2669 break;
2670 case ISIS_SUBTLV_AUTH_MD5:
2671 for(i=1;i<tlv_len;i++) {
2672 if (!ND_TTEST2(*(tptr + i), 1))
2673 goto trunctlv;
2674 ND_PRINT((ndo, "%02x", *(tptr + i)));
2675 }
2676 if (tlv_len != ISIS_SUBTLV_AUTH_MD5_LEN+1)
2677 ND_PRINT((ndo, ", (malformed subTLV) "));
2678
2679 #ifdef HAVE_LIBCRYPTO
2680 sigcheck = signature_verify(ndo, optr, length,
2681 (unsigned char *)tptr + 1);
2682 #else
2683 sigcheck = CANT_CHECK_SIGNATURE;
2684 #endif
2685 ND_PRINT((ndo, " (%s)", tok2str(signature_check_values, "Unknown", sigcheck)));
2686
2687 break;
2688 case ISIS_SUBTLV_AUTH_GENERIC:
2689 key_id = EXTRACT_16BITS((tptr+1));
2690 ND_PRINT((ndo, "%u, password: ", key_id));
2691 for(i=1 + sizeof(uint16_t);i<tlv_len;i++) {
2692 if (!ND_TTEST2(*(tptr + i), 1))
2693 goto trunctlv;
2694 ND_PRINT((ndo, "%02x", *(tptr + i)));
2695 }
2696 break;
2697 case ISIS_SUBTLV_AUTH_PRIVATE:
2698 default:
2699 if (!print_unknown_data(ndo, tptr + 1, "\n\t\t ", tlv_len - 1))
2700 return(0);
2701 break;
2702 }
2703 break;
2704
2705 case ISIS_TLV_PTP_ADJ:
2706 tlv_ptp_adj = (const struct isis_tlv_ptp_adj *)tptr;
2707 if(tmp>=1) {
2708 if (!ND_TTEST2(*tptr, 1))
2709 goto trunctlv;
2710 ND_PRINT((ndo, "\n\t Adjacency State: %s (%u)",
2711 tok2str(isis_ptp_adjancey_values, "unknown", *tptr),
2712 *tptr));
2713 tmp--;
2714 }
2715 if(tmp>sizeof(tlv_ptp_adj->extd_local_circuit_id)) {
2716 if (!ND_TTEST2(tlv_ptp_adj->extd_local_circuit_id,
2717 sizeof(tlv_ptp_adj->extd_local_circuit_id)))
2718 goto trunctlv;
2719 ND_PRINT((ndo, "\n\t Extended Local circuit-ID: 0x%08x",
2720 EXTRACT_32BITS(tlv_ptp_adj->extd_local_circuit_id)));
2721 tmp-=sizeof(tlv_ptp_adj->extd_local_circuit_id);
2722 }
2723 if(tmp>=SYSTEM_ID_LEN) {
2724 if (!ND_TTEST2(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN))
2725 goto trunctlv;
2726 ND_PRINT((ndo, "\n\t Neighbor System-ID: %s",
2727 isis_print_id(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN)));
2728 tmp-=SYSTEM_ID_LEN;
2729 }
2730 if(tmp>=sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)) {
2731 if (!ND_TTEST2(tlv_ptp_adj->neighbor_extd_local_circuit_id,
2732 sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)))
2733 goto trunctlv;
2734 ND_PRINT((ndo, "\n\t Neighbor Extended Local circuit-ID: 0x%08x",
2735 EXTRACT_32BITS(tlv_ptp_adj->neighbor_extd_local_circuit_id)));
2736 }
2737 break;
2738
2739 case ISIS_TLV_PROTOCOLS:
2740 ND_PRINT((ndo, "\n\t NLPID(s): "));
2741 while (tmp>0) {
2742 if (!ND_TTEST2(*(tptr), 1))
2743 goto trunctlv;
2744 ND_PRINT((ndo, "%s (0x%02x)",
2745 tok2str(nlpid_values,
2746 "unknown",
2747 *tptr),
2748 *tptr));
2749 if (tmp>1) /* further NPLIDs ? - put comma */
2750 ND_PRINT((ndo, ", "));
2751 tptr++;
2752 tmp--;
2753 }
2754 break;
2755
2756 case ISIS_TLV_MT_PORT_CAP:
2757 {
2758 if (!ND_TTEST2(*(tptr), 2))
2759 goto trunctlv;
2760
2761 ND_PRINT((ndo, "\n\t RES: %d, MTID(s): %d",
2762 (EXTRACT_16BITS (tptr) >> 12),
2763 (EXTRACT_16BITS (tptr) & 0x0fff)));
2764
2765 tmp = tmp-2;
2766 tptr = tptr+2;
2767
2768 if (tmp)
2769 isis_print_mt_port_cap_subtlv(ndo, tptr, tmp);
2770
2771 break;
2772 }
2773
2774 case ISIS_TLV_MT_CAPABILITY:
2775
2776 if (!ND_TTEST2(*(tptr), 2))
2777 goto trunctlv;
2778
2779 ND_PRINT((ndo, "\n\t O: %d, RES: %d, MTID(s): %d",
2780 (EXTRACT_16BITS(tptr) >> 15) & 0x01,
2781 (EXTRACT_16BITS(tptr) >> 12) & 0x07,
2782 EXTRACT_16BITS(tptr) & 0x0fff));
2783
2784 tmp = tmp-2;
2785 tptr = tptr+2;
2786
2787 if (tmp)
2788 isis_print_mt_capability_subtlv(ndo, tptr, tmp);
2789
2790 break;
2791
2792 case ISIS_TLV_TE_ROUTER_ID:
2793 if (!ND_TTEST2(*pptr, sizeof(struct in_addr)))
2794 goto trunctlv;
2795 ND_PRINT((ndo, "\n\t Traffic Engineering Router ID: %s", ipaddr_string(ndo, pptr)));
2796 break;
2797
2798 case ISIS_TLV_IPADDR:
2799 while (tmp>=sizeof(struct in_addr)) {
2800 if (!ND_TTEST2(*tptr, sizeof(struct in_addr)))
2801 goto trunctlv;
2802 ND_PRINT((ndo, "\n\t IPv4 interface address: %s", ipaddr_string(ndo, tptr)));
2803 tptr += sizeof(struct in_addr);
2804 tmp -= sizeof(struct in_addr);
2805 }
2806 break;
2807
2808 case ISIS_TLV_HOSTNAME:
2809 ND_PRINT((ndo, "\n\t Hostname: "));
2810 while (tmp>0) {
2811 if (!ND_TTEST2(*tptr, 1))
2812 goto trunctlv;
2813 ND_PRINT((ndo, "%c", *tptr++));
2814 tmp--;
2815 }
2816 break;
2817
2818 case ISIS_TLV_SHARED_RISK_GROUP:
2819 if (tmp < NODE_ID_LEN)
2820 break;
2821 if (!ND_TTEST2(*tptr, NODE_ID_LEN))
2822 goto trunctlv;
2823 ND_PRINT((ndo, "\n\t IS Neighbor: %s", isis_print_id(tptr, NODE_ID_LEN)));
2824 tptr+=(NODE_ID_LEN);
2825 tmp-=(NODE_ID_LEN);
2826
2827 if (tmp < 1)
2828 break;
2829 if (!ND_TTEST2(*tptr, 1))
2830 goto trunctlv;
2831 ND_PRINT((ndo, ", Flags: [%s]", ISIS_MASK_TLV_SHARED_RISK_GROUP(*tptr++) ? "numbered" : "unnumbered"));
2832 tmp--;
2833
2834 if (tmp < sizeof(struct in_addr))
2835 break;
2836 if (!ND_TTEST2(*tptr, sizeof(struct in_addr)))
2837 goto trunctlv;
2838 ND_PRINT((ndo, "\n\t IPv4 interface address: %s", ipaddr_string(ndo, tptr)));
2839 tptr+=sizeof(struct in_addr);
2840 tmp-=sizeof(struct in_addr);
2841
2842 if (tmp < sizeof(struct in_addr))
2843 break;
2844 if (!ND_TTEST2(*tptr, sizeof(struct in_addr)))
2845 goto trunctlv;
2846 ND_PRINT((ndo, "\n\t IPv4 neighbor address: %s", ipaddr_string(ndo, tptr)));
2847 tptr+=sizeof(struct in_addr);
2848 tmp-=sizeof(struct in_addr);
2849
2850 while (tmp>=4) {
2851 if (!ND_TTEST2(*tptr, 4))
2852 goto trunctlv;
2853 ND_PRINT((ndo, "\n\t Link-ID: 0x%08x", EXTRACT_32BITS(tptr)));
2854 tptr+=4;
2855 tmp-=4;
2856 }
2857 break;
2858
2859 case ISIS_TLV_LSP:
2860 tlv_lsp = (const struct isis_tlv_lsp *)tptr;
2861 while(tmp>=sizeof(struct isis_tlv_lsp)) {
2862 if (!ND_TTEST((tlv_lsp->lsp_id)[LSP_ID_LEN-1]))
2863 goto trunctlv;
2864 ND_PRINT((ndo, "\n\t lsp-id: %s",
2865 isis_print_id(tlv_lsp->lsp_id, LSP_ID_LEN)));
2866 if (!ND_TTEST2(tlv_lsp->sequence_number, 4))
2867 goto trunctlv;
2868 ND_PRINT((ndo, ", seq: 0x%08x", EXTRACT_32BITS(tlv_lsp->sequence_number)));
2869 if (!ND_TTEST2(tlv_lsp->remaining_lifetime, 2))
2870 goto trunctlv;
2871 ND_PRINT((ndo, ", lifetime: %5ds", EXTRACT_16BITS(tlv_lsp->remaining_lifetime)));
2872 if (!ND_TTEST2(tlv_lsp->checksum, 2))
2873 goto trunctlv;
2874 ND_PRINT((ndo, ", chksum: 0x%04x", EXTRACT_16BITS(tlv_lsp->checksum)));
2875 tmp-=sizeof(struct isis_tlv_lsp);
2876 tlv_lsp++;
2877 }
2878 break;
2879
2880 case ISIS_TLV_CHECKSUM:
2881 if (tmp < ISIS_TLV_CHECKSUM_MINLEN)
2882 break;
2883 if (!ND_TTEST2(*tptr, ISIS_TLV_CHECKSUM_MINLEN))
2884 goto trunctlv;
2885 ND_PRINT((ndo, "\n\t checksum: 0x%04x ", EXTRACT_16BITS(tptr)));
2886 /* do not attempt to verify the checksum if it is zero
2887 * most likely a HMAC-MD5 TLV is also present and
2888 * to avoid conflicts the checksum TLV is zeroed.
2889 * see rfc3358 for details
2890 */
2891 osi_print_cksum(ndo, optr, EXTRACT_16BITS(tptr), tptr-optr, length);
2892 break;
2893
2894 case ISIS_TLV_MT_SUPPORTED:
2895 if (tmp < ISIS_TLV_MT_SUPPORTED_MINLEN)
2896 break;
2897 while (tmp>1) {
2898 /* length can only be a multiple of 2, otherwise there is
2899 something broken -> so decode down until length is 1 */
2900 if (tmp!=1) {
2901 mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
2902 if (mt_len == 0) /* did something go wrong ? */
2903 goto trunctlv;
2904 tptr+=mt_len;
2905 tmp-=mt_len;
2906 } else {
2907 ND_PRINT((ndo, "\n\t malformed MT-ID"));
2908 break;
2909 }
2910 }
2911 break;
2912
2913 case ISIS_TLV_RESTART_SIGNALING:
2914 /* first attempt to decode the flags */
2915 if (tmp < ISIS_TLV_RESTART_SIGNALING_FLAGLEN)
2916 break;
2917 if (!ND_TTEST2(*tptr, ISIS_TLV_RESTART_SIGNALING_FLAGLEN))
2918 goto trunctlv;
2919 ND_PRINT((ndo, "\n\t Flags [%s]",
2920 bittok2str(isis_restart_flag_values, "none", *tptr)));
2921 tptr+=ISIS_TLV_RESTART_SIGNALING_FLAGLEN;
2922 tmp-=ISIS_TLV_RESTART_SIGNALING_FLAGLEN;
2923
2924 /* is there anything other than the flags field? */
2925 if (tmp == 0)
2926 break;
2927
2928 if (tmp < ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN)
2929 break;
2930 if (!ND_TTEST2(*tptr, ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN))
2931 goto trunctlv;
2932
2933 ND_PRINT((ndo, ", Remaining holding time %us", EXTRACT_16BITS(tptr)));
2934 tptr+=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN;
2935 tmp-=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN;
2936
2937 /* is there an additional sysid field present ?*/
2938 if (tmp == SYSTEM_ID_LEN) {
2939 if (!ND_TTEST2(*tptr, SYSTEM_ID_LEN))
2940 goto trunctlv;
2941 ND_PRINT((ndo, ", for %s", isis_print_id(tptr,SYSTEM_ID_LEN)));
2942 }
2943 break;
2944
2945 case ISIS_TLV_IDRP_INFO:
2946 if (tmp < ISIS_TLV_IDRP_INFO_MINLEN)
2947 break;
2948 if (!ND_TTEST2(*tptr, ISIS_TLV_IDRP_INFO_MINLEN))
2949 goto trunctlv;
2950 ND_PRINT((ndo, "\n\t Inter-Domain Information Type: %s",
2951 tok2str(isis_subtlv_idrp_values,
2952 "Unknown (0x%02x)",
2953 *tptr)));
2954 switch (*tptr++) {
2955 case ISIS_SUBTLV_IDRP_ASN:
2956 if (!ND_TTEST2(*tptr, 2)) /* fetch AS number */
2957 goto trunctlv;
2958 ND_PRINT((ndo, "AS Number: %u", EXTRACT_16BITS(tptr)));
2959 break;
2960 case ISIS_SUBTLV_IDRP_LOCAL:
2961 case ISIS_SUBTLV_IDRP_RES:
2962 default:
2963 if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_len - 1))
2964 return(0);
2965 break;
2966 }
2967 break;
2968
2969 case ISIS_TLV_LSP_BUFFERSIZE:
2970 if (tmp < ISIS_TLV_LSP_BUFFERSIZE_MINLEN)
2971 break;
2972 if (!ND_TTEST2(*tptr, ISIS_TLV_LSP_BUFFERSIZE_MINLEN))
2973 goto trunctlv;
2974 ND_PRINT((ndo, "\n\t LSP Buffersize: %u", EXTRACT_16BITS(tptr)));
2975 break;
2976
2977 case ISIS_TLV_PART_DIS:
2978 while (tmp >= SYSTEM_ID_LEN) {
2979 if (!ND_TTEST2(*tptr, SYSTEM_ID_LEN))
2980 goto trunctlv;
2981 ND_PRINT((ndo, "\n\t %s", isis_print_id(tptr, SYSTEM_ID_LEN)));
2982 tptr+=SYSTEM_ID_LEN;
2983 tmp-=SYSTEM_ID_LEN;
2984 }
2985 break;
2986
2987 case ISIS_TLV_PREFIX_NEIGH:
2988 if (tmp < sizeof(struct isis_metric_block))
2989 break;
2990 if (!ND_TTEST2(*tptr, sizeof(struct isis_metric_block)))
2991 goto trunctlv;
2992 ND_PRINT((ndo, "\n\t Metric Block"));
2993 isis_print_metric_block(ndo, (const struct isis_metric_block *)tptr);
2994 tptr+=sizeof(struct isis_metric_block);
2995 tmp-=sizeof(struct isis_metric_block);
2996
2997 while(tmp>0) {
2998 if (!ND_TTEST2(*tptr, 1))
2999 goto trunctlv;
3000 prefix_len=*tptr++; /* read out prefix length in semioctets*/
3001 if (prefix_len < 2) {
3002 ND_PRINT((ndo, "\n\t\tAddress: prefix length %u < 2", prefix_len));
3003 break;
3004 }
3005 tmp--;
3006 if (tmp < prefix_len/2)
3007 break;
3008 if (!ND_TTEST2(*tptr, prefix_len / 2))
3009 goto trunctlv;
3010 ND_PRINT((ndo, "\n\t\tAddress: %s/%u",
3011 isonsap_string(tptr, prefix_len / 2), prefix_len * 4));
3012 tptr+=prefix_len/2;
3013 tmp-=prefix_len/2;
3014 }
3015 break;
3016
3017 case ISIS_TLV_IIH_SEQNR:
3018 if (tmp < ISIS_TLV_IIH_SEQNR_MINLEN)
3019 break;
3020 if (!ND_TTEST2(*tptr, ISIS_TLV_IIH_SEQNR_MINLEN)) /* check if four bytes are on the wire */
3021 goto trunctlv;
3022 ND_PRINT((ndo, "\n\t Sequence number: %u", EXTRACT_32BITS(tptr)));
3023 break;
3024
3025 case ISIS_TLV_VENDOR_PRIVATE:
3026 if (tmp < ISIS_TLV_VENDOR_PRIVATE_MINLEN)
3027 break;
3028 if (!ND_TTEST2(*tptr, ISIS_TLV_VENDOR_PRIVATE_MINLEN)) /* check if enough byte for a full oui */
3029 goto trunctlv;
3030 vendor_id = EXTRACT_24BITS(tptr);
3031 ND_PRINT((ndo, "\n\t Vendor: %s (%u)",
3032 tok2str(oui_values, "Unknown", vendor_id),
3033 vendor_id));
3034 tptr+=3;
3035 tmp-=3;
3036 if (tmp > 0) /* hexdump the rest */
3037 if (!print_unknown_data(ndo, tptr, "\n\t\t", tmp))
3038 return(0);
3039 break;
3040 /*
3041 * FIXME those are the defined TLVs that lack a decoder
3042 * you are welcome to contribute code ;-)
3043 */
3044
3045 case ISIS_TLV_DECNET_PHASE4:
3046 case ISIS_TLV_LUCENT_PRIVATE:
3047 case ISIS_TLV_IPAUTH:
3048 case ISIS_TLV_NORTEL_PRIVATE1:
3049 case ISIS_TLV_NORTEL_PRIVATE2:
3050
3051 default:
3052 if (ndo->ndo_vflag <= 1) {
3053 if (!print_unknown_data(ndo, pptr, "\n\t\t", tlv_len))
3054 return(0);
3055 }
3056 break;
3057 }
3058 /* do we want to see an additionally hexdump ? */
3059 if (ndo->ndo_vflag> 1) {
3060 if (!print_unknown_data(ndo, pptr, "\n\t ", tlv_len))
3061 return(0);
3062 }
3063
3064 pptr += tlv_len;
3065 packet_len -= tlv_len;
3066 }
3067
3068 if (packet_len != 0) {
3069 ND_PRINT((ndo, "\n\t %u straggler bytes", packet_len));
3070 }
3071 return (1);
3072
3073 trunc:
3074 ND_PRINT((ndo, "[|isis]"));
3075 return (1);
3076
3077 trunctlv:
3078 ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
3079 return(1);
3080 }
3081
3082 static void
osi_print_cksum(netdissect_options * ndo,const uint8_t * pptr,uint16_t checksum,u_int checksum_offset,u_int length)3083 osi_print_cksum(netdissect_options *ndo,
3084 const uint8_t *pptr, uint16_t checksum,
3085 u_int checksum_offset, u_int length)
3086 {
3087 uint16_t calculated_checksum;
3088
3089 /* do not attempt to verify the checksum if it is zero,
3090 * if the total length is nonsense,
3091 * if the offset is nonsense,
3092 * or the base pointer is not sane
3093 */
3094 if (!checksum
3095 || length > ndo->ndo_snaplen
3096 || checksum_offset > ndo->ndo_snaplen
3097 || checksum_offset > length) {
3098 ND_PRINT((ndo, "(unverified)"));
3099 } else {
3100 const char *truncated = "trunc";
3101 //printf("\nosi_print_cksum: %p %u %u %u\n", pptr, checksum_offset, length, ndo->ndo_snaplen);
3102 //ND_TCHECK2(pptr, checksum_offset+length);
3103 calculated_checksum = create_osi_cksum(pptr, checksum_offset, length);
3104 if (checksum == calculated_checksum) {
3105 ND_PRINT((ndo, " (correct)"));
3106 } else {
3107 truncated = "incorrect";
3108 //trunc:
3109 ND_PRINT((ndo, " (%s should be 0x%04x)", truncated, calculated_checksum));
3110 }
3111 }
3112 }
3113
3114 /*
3115 * Local Variables:
3116 * c-style: whitesmith
3117 * c-basic-offset: 8
3118 * End:
3119 */
3120