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