tcpdump  4.99.1
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print-isoclns.c
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1 /*
2  * Copyright (c) 1992, 1993, 1994, 1995, 1996
3  * The Regents of the University of California. All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that: (1) source code distributions
7  * retain the above copyright notice and this paragraph in its entirety, (2)
8  * distributions including binary code include the above copyright notice and
9  * this paragraph in its entirety in the documentation or other materials
10  * provided with the distribution, and (3) all advertising materials mentioning
11  * features or use of this software display the following acknowledgement:
12  * ``This product includes software developed by the University of California,
13  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14  * the University nor the names of its contributors may be used to endorse
15  * or promote products derived from this software without specific prior
16  * written permission.
17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20  *
21  * Original code by Matt Thomas, Digital Equipment Corporation
22  *
23  * Extensively modified by Hannes Gredler (hannes@gredler.at) for more
24  * complete IS-IS & CLNP support.
25  */
26 
27 /* \summary: ISO CLNS, ESIS, and ISIS printer */
28 
29 /*
30  * specification:
31  *
32  * CLNP: ISO 8473 (respective ITU version is at https://www.itu.int/rec/T-REC-X.233/en/)
33  * ES-IS: ISO 9542
34  * IS-IS: ISO 10589
35  */
36 
37 #ifdef HAVE_CONFIG_H
38 #include <config.h>
39 #endif
40 
41 #include "netdissect-stdinc.h"
42 
43 #include <string.h>
44 
45 #include "netdissect.h"
46 #include "addrtoname.h"
47 #include "nlpid.h"
48 #include "extract.h"
49 #include "gmpls.h"
50 #include "oui.h"
51 #include "signature.h"
52 
53 
54 /*
55  * IS-IS is defined in ISO 10589. Look there for protocol definitions.
56  */
57 
58 #define SYSTEM_ID_LEN MAC_ADDR_LEN
59 #define NODE_ID_LEN (SYSTEM_ID_LEN+1)
60 #define LSP_ID_LEN (SYSTEM_ID_LEN+2)
61 
62 #define ISIS_VERSION 1
63 #define ESIS_VERSION 1
64 #define CLNP_VERSION 1
65 
66 #define ISIS_PDU_TYPE_MASK 0x1F
67 #define ESIS_PDU_TYPE_MASK 0x1F
68 #define CLNP_PDU_TYPE_MASK 0x1F
69 #define CLNP_FLAG_MASK 0xE0
70 #define ISIS_LAN_PRIORITY_MASK 0x7F
71 
72 #define ISIS_PDU_L1_LAN_IIH 15
73 #define ISIS_PDU_L2_LAN_IIH 16
74 #define ISIS_PDU_PTP_IIH 17
75 #define ISIS_PDU_L1_LSP 18
76 #define ISIS_PDU_L2_LSP 20
77 #define ISIS_PDU_L1_CSNP 24
78 #define ISIS_PDU_L2_CSNP 25
79 #define ISIS_PDU_L1_PSNP 26
80 #define ISIS_PDU_L2_PSNP 27
81 
82 static const struct tok isis_pdu_values[] = {
83  { ISIS_PDU_L1_LAN_IIH, "L1 Lan IIH"},
84  { ISIS_PDU_L2_LAN_IIH, "L2 Lan IIH"},
85  { ISIS_PDU_PTP_IIH, "p2p IIH"},
86  { ISIS_PDU_L1_LSP, "L1 LSP"},
87  { ISIS_PDU_L2_LSP, "L2 LSP"},
88  { ISIS_PDU_L1_CSNP, "L1 CSNP"},
89  { ISIS_PDU_L2_CSNP, "L2 CSNP"},
90  { ISIS_PDU_L1_PSNP, "L1 PSNP"},
91  { ISIS_PDU_L2_PSNP, "L2 PSNP"},
92  { 0, NULL}
93 };
94 
95 /*
96  * A TLV is a tuple of a type, length and a value and is normally used for
97  * encoding information in all sorts of places. This is an enumeration of
98  * the well known types.
99  *
100  * list taken from rfc3359 plus some memory from veterans ;-)
101  */
102 
103 #define ISIS_TLV_AREA_ADDR 1 /* iso10589 */
104 #define ISIS_TLV_IS_REACH 2 /* iso10589 */
105 #define ISIS_TLV_ESNEIGH 3 /* iso10589 */
106 #define ISIS_TLV_PART_DIS 4 /* iso10589 */
107 #define ISIS_TLV_PREFIX_NEIGH 5 /* iso10589 */
108 #define ISIS_TLV_ISNEIGH 6 /* iso10589 */
109 #define ISIS_TLV_INSTANCE_ID 7 /* rfc8202 */
110 #define ISIS_TLV_PADDING 8 /* iso10589 */
111 #define ISIS_TLV_LSP 9 /* iso10589 */
112 #define ISIS_TLV_AUTH 10 /* iso10589, rfc3567 */
113 #define ISIS_TLV_CHECKSUM 12 /* rfc3358 */
114 #define ISIS_TLV_CHECKSUM_MINLEN 2
115 #define ISIS_TLV_POI 13 /* rfc6232 */
116 #define ISIS_TLV_LSP_BUFFERSIZE 14 /* iso10589 rev2 */
117 #define ISIS_TLV_EXT_IS_REACH 22 /* rfc5305 */
118 #define ISIS_TLV_IS_ALIAS_ID 24 /* rfc5311 */
119 #define ISIS_TLV_DECNET_PHASE4 42
120 #define ISIS_TLV_LUCENT_PRIVATE 66
121 #define ISIS_TLV_INT_IP_REACH 128 /* rfc1195, rfc2966 */
122 #define ISIS_TLV_PROTOCOLS 129 /* rfc1195 */
123 #define ISIS_TLV_EXT_IP_REACH 130 /* rfc1195, rfc2966 */
124 #define ISIS_TLV_IDRP_INFO 131 /* rfc1195 */
125 #define ISIS_TLV_IPADDR 132 /* rfc1195 */
126 #define ISIS_TLV_IPAUTH 133 /* rfc1195 */
127 #define ISIS_TLV_TE_ROUTER_ID 134 /* rfc5305 */
128 #define ISIS_TLV_EXTD_IP_REACH 135 /* rfc5305 */
129 #define ISIS_TLV_HOSTNAME 137 /* rfc2763 */
130 #define ISIS_TLV_SHARED_RISK_GROUP 138 /* draft-ietf-isis-gmpls-extensions */
131 #define ISIS_TLV_MT_PORT_CAP 143 /* rfc6165 */
132 #define ISIS_TLV_MT_CAPABILITY 144 /* rfc6329 */
133 #define ISIS_TLV_NORTEL_PRIVATE1 176
134 #define ISIS_TLV_NORTEL_PRIVATE2 177
135 #define ISIS_TLV_RESTART_SIGNALING 211 /* rfc3847 */
136 #define ISIS_TLV_RESTART_SIGNALING_FLAGLEN 1
137 #define ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN 2
138 #define ISIS_TLV_MT_IS_REACH 222 /* draft-ietf-isis-wg-multi-topology-05 */
139 #define ISIS_TLV_MT_SUPPORTED 229 /* draft-ietf-isis-wg-multi-topology-05 */
140 #define ISIS_TLV_IP6ADDR 232 /* draft-ietf-isis-ipv6-02 */
141 #define ISIS_TLV_MT_IP_REACH 235 /* draft-ietf-isis-wg-multi-topology-05 */
142 #define ISIS_TLV_IP6_REACH 236 /* draft-ietf-isis-ipv6-02 */
143 #define ISIS_TLV_MT_IP6_REACH 237 /* draft-ietf-isis-wg-multi-topology-05 */
144 #define ISIS_TLV_PTP_ADJ 240 /* rfc3373 */
145 #define ISIS_TLV_IIH_SEQNR 241 /* draft-shen-isis-iih-sequence-00 */
146 #define ISIS_TLV_ROUTER_CAPABILITY 242 /* rfc7981 */
147 #define ISIS_TLV_VENDOR_PRIVATE 250 /* draft-ietf-isis-experimental-tlv-01 */
148 #define ISIS_TLV_VENDOR_PRIVATE_MINLEN 3
149 
150 static const struct tok isis_tlv_values[] = {
151  { ISIS_TLV_AREA_ADDR, "Area address(es)"},
152  { ISIS_TLV_IS_REACH, "IS Reachability"},
153  { ISIS_TLV_ESNEIGH, "ES Neighbor(s)"},
154  { ISIS_TLV_PART_DIS, "Partition DIS"},
155  { ISIS_TLV_PREFIX_NEIGH, "Prefix Neighbors"},
156  { ISIS_TLV_ISNEIGH, "IS Neighbor(s)"},
157  { ISIS_TLV_INSTANCE_ID, "Instance Identifier"},
158  { ISIS_TLV_PADDING, "Padding"},
159  { ISIS_TLV_LSP, "LSP entries"},
160  { ISIS_TLV_AUTH, "Authentication"},
161  { ISIS_TLV_CHECKSUM, "Checksum"},
162  { ISIS_TLV_POI, "Purge Originator Identifier"},
163  { ISIS_TLV_LSP_BUFFERSIZE, "LSP Buffersize"},
164  { ISIS_TLV_EXT_IS_REACH, "Extended IS Reachability"},
165  { ISIS_TLV_IS_ALIAS_ID, "IS Alias ID"},
166  { ISIS_TLV_DECNET_PHASE4, "DECnet Phase IV"},
167  { ISIS_TLV_LUCENT_PRIVATE, "Lucent Proprietary"},
168  { ISIS_TLV_INT_IP_REACH, "IPv4 Internal Reachability"},
169  { ISIS_TLV_PROTOCOLS, "Protocols supported"},
170  { ISIS_TLV_EXT_IP_REACH, "IPv4 External Reachability"},
171  { ISIS_TLV_IDRP_INFO, "Inter-Domain Information Type"},
172  { ISIS_TLV_IPADDR, "IPv4 Interface address(es)"},
173  { ISIS_TLV_IPAUTH, "IPv4 authentication (deprecated)"},
174  { ISIS_TLV_TE_ROUTER_ID, "Traffic Engineering Router ID"},
175  { ISIS_TLV_EXTD_IP_REACH, "Extended IPv4 Reachability"},
176  { ISIS_TLV_SHARED_RISK_GROUP, "Shared Risk Link Group"},
177  { ISIS_TLV_MT_PORT_CAP, "Multi-Topology-Aware Port Capability"},
178  { ISIS_TLV_MT_CAPABILITY, "Multi-Topology Capability"},
179  { ISIS_TLV_NORTEL_PRIVATE1, "Nortel Proprietary"},
180  { ISIS_TLV_NORTEL_PRIVATE2, "Nortel Proprietary"},
181  { ISIS_TLV_HOSTNAME, "Hostname"},
182  { ISIS_TLV_RESTART_SIGNALING, "Restart Signaling"},
183  { ISIS_TLV_MT_IS_REACH, "Multi Topology IS Reachability"},
184  { ISIS_TLV_MT_SUPPORTED, "Multi Topology"},
185  { ISIS_TLV_IP6ADDR, "IPv6 Interface address(es)"},
186  { ISIS_TLV_MT_IP_REACH, "Multi-Topology IPv4 Reachability"},
187  { ISIS_TLV_IP6_REACH, "IPv6 reachability"},
188  { ISIS_TLV_MT_IP6_REACH, "Multi-Topology IP6 Reachability"},
189  { ISIS_TLV_PTP_ADJ, "Point-to-point Adjacency State"},
190  { ISIS_TLV_IIH_SEQNR, "Hello PDU Sequence Number"},
191  { ISIS_TLV_ROUTER_CAPABILITY, "IS-IS Router Capability"},
192  { ISIS_TLV_VENDOR_PRIVATE, "Vendor Private"},
193  { 0, NULL }
194 };
195 
196 #define ESIS_OPTION_PROTOCOLS 129
197 #define ESIS_OPTION_QOS_MAINTENANCE 195 /* iso9542 */
198 #define ESIS_OPTION_SECURITY 197 /* iso9542 */
199 #define ESIS_OPTION_ES_CONF_TIME 198 /* iso9542 */
200 #define ESIS_OPTION_PRIORITY 205 /* iso9542 */
201 #define ESIS_OPTION_ADDRESS_MASK 225 /* iso9542 */
202 #define ESIS_OPTION_SNPA_MASK 226 /* iso9542 */
203 
204 static const struct tok esis_option_values[] = {
205  { ESIS_OPTION_PROTOCOLS, "Protocols supported"},
206  { ESIS_OPTION_QOS_MAINTENANCE, "QoS Maintenance" },
207  { ESIS_OPTION_SECURITY, "Security" },
208  { ESIS_OPTION_ES_CONF_TIME, "ES Configuration Time" },
209  { ESIS_OPTION_PRIORITY, "Priority" },
210  { ESIS_OPTION_ADDRESS_MASK, "Addressk Mask" },
211  { ESIS_OPTION_SNPA_MASK, "SNPA Mask" },
212  { 0, NULL }
213 };
214 
215 #define CLNP_OPTION_DISCARD_REASON 193
216 #define CLNP_OPTION_QOS_MAINTENANCE 195 /* iso8473 */
217 #define CLNP_OPTION_SECURITY 197 /* iso8473 */
218 #define CLNP_OPTION_SOURCE_ROUTING 200 /* iso8473 */
219 #define CLNP_OPTION_ROUTE_RECORDING 203 /* iso8473 */
220 #define CLNP_OPTION_PADDING 204 /* iso8473 */
221 #define CLNP_OPTION_PRIORITY 205 /* iso8473 */
222 
223 static const struct tok clnp_option_values[] = {
224  { CLNP_OPTION_DISCARD_REASON, "Discard Reason"},
225  { CLNP_OPTION_PRIORITY, "Priority"},
226  { CLNP_OPTION_QOS_MAINTENANCE, "QoS Maintenance"},
227  { CLNP_OPTION_SECURITY, "Security"},
228  { CLNP_OPTION_SOURCE_ROUTING, "Source Routing"},
229  { CLNP_OPTION_ROUTE_RECORDING, "Route Recording"},
230  { CLNP_OPTION_PADDING, "Padding"},
231  { 0, NULL }
232 };
233 
234 static const struct tok clnp_option_rfd_class_values[] = {
235  { 0x0, "General"},
236  { 0x8, "Address"},
237  { 0x9, "Source Routeing"},
238  { 0xa, "Lifetime"},
239  { 0xb, "PDU Discarded"},
240  { 0xc, "Reassembly"},
241  { 0, NULL }
242 };
243 
244 static const struct tok clnp_option_rfd_general_values[] = {
245  { 0x0, "Reason not specified"},
246  { 0x1, "Protocol procedure error"},
247  { 0x2, "Incorrect checksum"},
248  { 0x3, "PDU discarded due to congestion"},
249  { 0x4, "Header syntax error (cannot be parsed)"},
250  { 0x5, "Segmentation needed but not permitted"},
251  { 0x6, "Incomplete PDU received"},
252  { 0x7, "Duplicate option"},
253  { 0, NULL }
254 };
255 
256 static const struct tok clnp_option_rfd_address_values[] = {
257  { 0x0, "Destination address unreachable"},
258  { 0x1, "Destination address unknown"},
259  { 0, NULL }
260 };
261 
262 static const struct tok clnp_option_rfd_source_routeing_values[] = {
263  { 0x0, "Unspecified source routeing error"},
264  { 0x1, "Syntax error in source routeing field"},
265  { 0x2, "Unknown address in source routeing field"},
266  { 0x3, "Path not acceptable"},
267  { 0, NULL }
268 };
269 
270 static const struct tok clnp_option_rfd_lifetime_values[] = {
271  { 0x0, "Lifetime expired while data unit in transit"},
272  { 0x1, "Lifetime expired during reassembly"},
273  { 0, NULL }
274 };
275 
276 static const struct tok clnp_option_rfd_pdu_discard_values[] = {
277  { 0x0, "Unsupported option not specified"},
278  { 0x1, "Unsupported protocol version"},
279  { 0x2, "Unsupported security option"},
280  { 0x3, "Unsupported source routeing option"},
281  { 0x4, "Unsupported recording of route option"},
282  { 0, NULL }
283 };
284 
285 static const struct tok clnp_option_rfd_reassembly_values[] = {
286  { 0x0, "Reassembly interference"},
287  { 0, NULL }
288 };
289 
290 /* array of 16 error-classes */
291 static const struct tok *clnp_option_rfd_error_class[] = {
293  NULL,
294  NULL,
295  NULL,
296  NULL,
297  NULL,
298  NULL,
299  NULL,
305  NULL,
306  NULL,
307  NULL
308 };
309 
310 #define CLNP_OPTION_OPTION_QOS_MASK 0x3f
311 #define CLNP_OPTION_SCOPE_MASK 0xc0
312 #define CLNP_OPTION_SCOPE_SA_SPEC 0x40
313 #define CLNP_OPTION_SCOPE_DA_SPEC 0x80
314 #define CLNP_OPTION_SCOPE_GLOBAL 0xc0
315 
316 static const struct tok clnp_option_scope_values[] = {
317  { CLNP_OPTION_SCOPE_SA_SPEC, "Source Address Specific"},
318  { CLNP_OPTION_SCOPE_DA_SPEC, "Destination Address Specific"},
319  { CLNP_OPTION_SCOPE_GLOBAL, "Globally unique"},
320  { 0, NULL }
321 };
322 
323 static const struct tok clnp_option_sr_rr_values[] = {
324  { 0x0, "partial"},
325  { 0x1, "complete"},
326  { 0, NULL }
327 };
328 
329 static const struct tok clnp_option_sr_rr_string_values[] = {
330  { CLNP_OPTION_SOURCE_ROUTING, "source routing"},
331  { CLNP_OPTION_ROUTE_RECORDING, "recording of route in progress"},
332  { 0, NULL }
333 };
334 
335 static const struct tok clnp_option_qos_global_values[] = {
336  { 0x20, "reserved"},
337  { 0x10, "sequencing vs. delay"},
338  { 0x08, "congested"},
339  { 0x04, "delay vs. cost"},
340  { 0x02, "error vs. delay"},
341  { 0x01, "error vs. cost"},
342  { 0, NULL }
343 };
344 
345 static const struct tok isis_tlv_router_capability_flags[] = {
346  { 0x01, "S bit"},
347  { 0x02, "D bit"},
348  { 0, NULL }
349 };
350 
351 #define ISIS_SUBTLV_ROUTER_CAP_SR 2 /* rfc 8667 */
352 
353 static const struct tok isis_router_capability_subtlv_values[] = {
354  { ISIS_SUBTLV_ROUTER_CAP_SR, "SR-Capabilities"},
355  { 0, NULL }
356 };
357 
358 static const struct tok isis_router_capability_sr_flags[] = {
359  { 0x80, "ipv4"},
360  { 0x40, "ipv6"},
361  { 0, NULL }
362 };
363 
364 #define ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP 3 /* rfc5305 */
365 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID 4 /* rfc4205 */
366 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID 5 /* rfc5305 */
367 #define ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR 6 /* rfc5305 */
368 #define ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR 8 /* rfc5305 */
369 #define ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW 9 /* rfc5305 */
370 #define ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW 10 /* rfc5305 */
371 #define ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW 11 /* rfc4124 */
372 #define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD 12 /* draft-ietf-tewg-diff-te-proto-06 */
373 #define ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC 18 /* rfc5305 */
374 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE 19 /* draft-ietf-isis-link-attr-01 */
375 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE 20 /* rfc4205 */
376 #define ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR 21 /* rfc4205 */
377 #define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS 22 /* rfc4124 */
378 #define ISIS_SUBTLV_EXT_IS_REACH_LAN_ADJ_SEGMENT_ID 32 /* rfc8667 */
379 
380 #define ISIS_SUBTLV_SPB_METRIC 29 /* rfc6329 */
381 
382 static const struct tok isis_ext_is_reach_subtlv_values[] = {
383  { ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP, "Administrative groups" },
384  { ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" },
385  { ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID, "Link Remote Identifier" },
386  { ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR, "IPv4 interface address" },
387  { ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR, "IPv4 neighbor address" },
388  { ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW, "Maximum link bandwidth" },
389  { ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW, "Reservable link bandwidth" },
390  { ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW, "Unreserved bandwidth" },
391  { ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC, "Traffic Engineering Metric" },
392  { ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE, "Link Attribute" },
393  { ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE, "Link Protection Type" },
394  { ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR, "Interface Switching Capability" },
395  { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD, "Bandwidth Constraints (old)" },
396  { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS, "Bandwidth Constraints" },
397  { ISIS_SUBTLV_EXT_IS_REACH_LAN_ADJ_SEGMENT_ID, "LAN Adjacency Segment Identifier" },
398  { ISIS_SUBTLV_SPB_METRIC, "SPB Metric" },
399  { 250, "Reserved for cisco specific extensions" },
400  { 251, "Reserved for cisco specific extensions" },
401  { 252, "Reserved for cisco specific extensions" },
402  { 253, "Reserved for cisco specific extensions" },
403  { 254, "Reserved for cisco specific extensions" },
404  { 255, "Reserved for future expansion" },
405  { 0, NULL }
406 };
407 
408 #define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32 1 /* draft-ietf-isis-admin-tags-01 */
409 #define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64 2 /* draft-ietf-isis-admin-tags-01 */
410 #define ISIS_SUBTLV_EXTD_IP_REACH_PREFIX_SID 3 /* rfc8667 */
411 #define ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR 117 /* draft-ietf-isis-wg-multi-topology-05 */
412 
413 static const struct tok isis_ext_ip_reach_subtlv_values[] = {
414  { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32, "32-Bit Administrative tag" },
415  { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64, "64-Bit Administrative tag" },
416  { ISIS_SUBTLV_EXTD_IP_REACH_PREFIX_SID, "Prefix SID" },
417  { ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR, "Management Prefix Color" },
418  { 0, NULL }
419 };
420 
421 #define ISIS_PREFIX_SID_FLAG_R 0x80 /* rfc 8667 */
422 #define ISIS_PREFIX_SID_FLAG_N 0x40 /* rfc 8667 */
423 #define ISIS_PREFIX_SID_FLAG_P 0x20 /* rfc 8667 */
424 #define ISIS_PREFIX_SID_FLAG_E 0x10 /* rfc 8667 */
425 #define ISIS_PREFIX_SID_FLAG_V 0x08 /* rfc 8667 */
426 #define ISIS_PREFIX_SID_FLAG_L 0x04 /* rfc 8667 */
427 
428 static const struct tok prefix_sid_flag_values[] = {
429  { ISIS_PREFIX_SID_FLAG_R, "Readvertisement"},
430  { ISIS_PREFIX_SID_FLAG_N, "Node"},
431  { ISIS_PREFIX_SID_FLAG_P, "No-PHP"},
432  { ISIS_PREFIX_SID_FLAG_E, "Explicit NULL"},
433  { ISIS_PREFIX_SID_FLAG_V, "Value"},
434  { ISIS_PREFIX_SID_FLAG_L, "Local"},
435  { 0, NULL}
436 };
437 
438 
439 /* rfc 8667 */
440 static const struct tok prefix_sid_algo_values[] = {
441  { 0, "SPF"},
442  { 1, "strict-SPF"},
443  { 0, NULL}
444 };
445 
446 static const struct tok isis_subtlv_link_attribute_values[] = {
447  { 0x01, "Local Protection Available" },
448  { 0x02, "Link excluded from local protection path" },
449  { 0x04, "Local maintenance required"},
450  { 0, NULL }
451 };
452 
453 static const struct tok isis_lan_adj_sid_flag_values[] = {
454  { 0x80, "Address family IPv6" },
455  { 0x40, "Backup" },
456  { 0x20, "Value" },
457  { 0x10, "Local significance" },
458  { 0x08, "Set of adjacencies" },
459  { 0x04, "Persistent" },
460  { 0, NULL }
461 };
462 
463 #define ISIS_SUBTLV_AUTH_SIMPLE 1
464 #define ISIS_SUBTLV_AUTH_GENERIC 3 /* rfc 5310 */
465 #define ISIS_SUBTLV_AUTH_MD5 54
466 #define ISIS_SUBTLV_AUTH_MD5_LEN 16
467 #define ISIS_SUBTLV_AUTH_PRIVATE 255
468 
469 static const struct tok isis_subtlv_auth_values[] = {
470  { ISIS_SUBTLV_AUTH_SIMPLE, "simple text password"},
471  { ISIS_SUBTLV_AUTH_GENERIC, "Generic Crypto key-id"},
472  { ISIS_SUBTLV_AUTH_MD5, "HMAC-MD5 password"},
473  { ISIS_SUBTLV_AUTH_PRIVATE, "Routing Domain private password"},
474  { 0, NULL }
475 };
476 
477 #define ISIS_SUBTLV_IDRP_RES 0
478 #define ISIS_SUBTLV_IDRP_LOCAL 1
479 #define ISIS_SUBTLV_IDRP_ASN 2
480 
481 static const struct tok isis_subtlv_idrp_values[] = {
482  { ISIS_SUBTLV_IDRP_RES, "Reserved"},
483  { ISIS_SUBTLV_IDRP_LOCAL, "Routing-Domain Specific"},
484  { ISIS_SUBTLV_IDRP_ASN, "AS Number Tag"},
485  { 0, NULL}
486 };
487 
488 #define ISIS_SUBTLV_SPB_MCID 4
489 #define ISIS_SUBTLV_SPB_DIGEST 5
490 #define ISIS_SUBTLV_SPB_BVID 6
491 
492 #define ISIS_SUBTLV_SPB_INSTANCE 1
493 #define ISIS_SUBTLV_SPBM_SI 3
494 
495 #define ISIS_SPB_MCID_LEN 51
496 #define ISIS_SUBTLV_SPB_MCID_MIN_LEN 102
497 #define ISIS_SUBTLV_SPB_DIGEST_MIN_LEN 33
498 #define ISIS_SUBTLV_SPB_BVID_MIN_LEN 6
499 #define ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN 19
500 #define ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN 8
501 
502 static const struct tok isis_mt_port_cap_subtlv_values[] = {
503  { ISIS_SUBTLV_SPB_MCID, "SPB MCID" },
504  { ISIS_SUBTLV_SPB_DIGEST, "SPB Digest" },
505  { ISIS_SUBTLV_SPB_BVID, "SPB BVID" },
506  { 0, NULL }
507 };
508 
509 static const struct tok isis_mt_capability_subtlv_values[] = {
510  { ISIS_SUBTLV_SPB_INSTANCE, "SPB Instance" },
511  { ISIS_SUBTLV_SPBM_SI, "SPBM Service Identifier and Unicast Address" },
512  { 0, NULL }
513 };
514 
520 };
521 
523  struct isis_spb_mcid mcid;
524  struct isis_spb_mcid aux_mcid;
525 };
526 
533 };
534 
535 #define CLNP_SEGMENT_PART 0x80
536 #define CLNP_MORE_SEGMENTS 0x40
537 #define CLNP_REQUEST_ER 0x20
538 
539 static const struct tok clnp_flag_values[] = {
540  { CLNP_SEGMENT_PART, "Segmentation permitted"},
541  { CLNP_MORE_SEGMENTS, "more Segments"},
542  { CLNP_REQUEST_ER, "request Error Report"},
543  { 0, NULL}
544 };
545 
546 #define ISIS_MASK_LSP_OL_BIT(x) (GET_U_1(x)&0x4)
547 #define ISIS_MASK_LSP_ISTYPE_BITS(x) (GET_U_1(x)&0x3)
548 #define ISIS_MASK_LSP_PARTITION_BIT(x) (GET_U_1(x)&0x80)
549 #define ISIS_MASK_LSP_ATT_BITS(x) (GET_U_1(x)&0x78)
550 #define ISIS_MASK_LSP_ATT_ERROR_BIT(x) (GET_U_1(x)&0x40)
551 #define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x) (GET_U_1(x)&0x20)
552 #define ISIS_MASK_LSP_ATT_DELAY_BIT(x) (GET_U_1(x)&0x10)
553 #define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x) (GET_U_1(x)&0x8)
554 
555 #define ISIS_MASK_MTID(x) ((x)&0x0fff)
556 #define ISIS_MASK_MTFLAGS(x) ((x)&0xf000)
557 
558 static const struct tok isis_mt_flag_values[] = {
559  { 0x4000, "ATT bit set"},
560  { 0x8000, "Overload bit set"},
561  { 0, NULL}
562 };
563 
564 #define ISIS_MASK_TLV_EXTD_IP_UPDOWN(x) ((x)&0x80)
565 #define ISIS_MASK_TLV_EXTD_IP_SUBTLV(x) ((x)&0x40)
566 
567 #define ISIS_MASK_TLV_EXTD_IP6_IE(x) ((x)&0x40)
568 #define ISIS_MASK_TLV_EXTD_IP6_SUBTLV(x) ((x)&0x20)
569 
570 #define ISIS_LSP_TLV_METRIC_SUPPORTED(x) (GET_U_1(x)&0x80)
571 #define ISIS_LSP_TLV_METRIC_IE(x) (GET_U_1(x)&0x40)
572 #define ISIS_LSP_TLV_METRIC_UPDOWN(x) (GET_U_1(x)&0x80)
573 #define ISIS_LSP_TLV_METRIC_VALUE(x) (GET_U_1(x)&0x3f)
574 
575 #define ISIS_MASK_TLV_SHARED_RISK_GROUP(x) ((x)&0x1)
576 
577 static const struct tok isis_mt_values[] = {
578  { 0, "IPv4 unicast"},
579  { 1, "In-Band Management"},
580  { 2, "IPv6 unicast"},
581  { 3, "Multicast"},
582  { 4095, "Development, Experimental or Proprietary"},
583  { 0, NULL }
584 };
585 
586 static const struct tok isis_iih_circuit_type_values[] = {
587  { 1, "Level 1 only"},
588  { 2, "Level 2 only"},
589  { 3, "Level 1, Level 2"},
590  { 0, NULL}
591 };
592 
593 #define ISIS_LSP_TYPE_UNUSED0 0
594 #define ISIS_LSP_TYPE_LEVEL_1 1
595 #define ISIS_LSP_TYPE_UNUSED2 2
596 #define ISIS_LSP_TYPE_LEVEL_2 3
597 
598 static const struct tok isis_lsp_istype_values[] = {
599  { ISIS_LSP_TYPE_UNUSED0, "Unused 0x0 (invalid)"},
600  { ISIS_LSP_TYPE_LEVEL_1, "L1 IS"},
601  { ISIS_LSP_TYPE_UNUSED2, "Unused 0x2 (invalid)"},
602  { ISIS_LSP_TYPE_LEVEL_2, "L2 IS"},
603  { 0, NULL }
604 };
605 
606 /*
607  * Katz's point to point adjacency TLV uses codes to tell us the state of
608  * the remote adjacency. Enumerate them.
609  */
610 
611 #define ISIS_PTP_ADJ_UP 0
612 #define ISIS_PTP_ADJ_INIT 1
613 #define ISIS_PTP_ADJ_DOWN 2
614 
615 static const struct tok isis_ptp_adjancey_values[] = {
616  { ISIS_PTP_ADJ_UP, "Up" },
617  { ISIS_PTP_ADJ_INIT, "Initializing" },
618  { ISIS_PTP_ADJ_DOWN, "Down" },
619  { 0, NULL}
620 };
621 
627 };
628 
629 static void osi_print_cksum(netdissect_options *, const uint8_t *pptr,
630  uint16_t checksum, int checksum_offset, u_int length);
631 static int clnp_print(netdissect_options *, const uint8_t *, u_int);
632 static void esis_print(netdissect_options *, const uint8_t *, u_int);
633 static int isis_print(netdissect_options *, const uint8_t *, u_int);
634 
640 };
641 
645 };
646 
650 };
651 
656 };
657 
658 static const struct tok isis_is_reach_virtual_values[] = {
659  { 0, "IsNotVirtual"},
660  { 1, "IsVirtual"},
661  { 0, NULL }
662 };
663 
664 static const struct tok isis_restart_flag_values[] = {
665  { 0x1, "Restart Request"},
666  { 0x2, "Restart Acknowledgement"},
667  { 0x4, "Suppress adjacency advertisement"},
668  { 0, NULL }
669 };
670 
674  nd_uint8_t version; /* Protocol version */
676  nd_uint8_t pdu_type; /* 3 MSbits are reserved */
677  nd_uint8_t pdu_version; /* Packet format version */
680 };
681 
689 };
690 
697 };
698 
706 };
707 
713 };
714 
718 };
719 
720 struct isis_tlv_lsp {
725 };
726 
727 #define ISIS_COMMON_HEADER_SIZE (sizeof(struct isis_common_header))
728 #define ISIS_IIH_LAN_HEADER_SIZE (sizeof(struct isis_iih_lan_header))
729 #define ISIS_IIH_PTP_HEADER_SIZE (sizeof(struct isis_iih_ptp_header))
730 #define ISIS_LSP_HEADER_SIZE (sizeof(struct isis_lsp_header))
731 #define ISIS_CSNP_HEADER_SIZE (sizeof(struct isis_csnp_header))
732 #define ISIS_PSNP_HEADER_SIZE (sizeof(struct isis_psnp_header))
733 
734 void
735 isoclns_print(netdissect_options *ndo, const u_char *p, u_int length)
736 {
737  ndo->ndo_protocol = "isoclns";
738 
739  if (ndo->ndo_eflag)
740  ND_PRINT("OSI NLPID %s (0x%02x): ",
741  tok2str(nlpid_values, "Unknown", GET_U_1(p)),
742  GET_U_1(p));
743 
744  switch (GET_U_1(p)) {
745 
746  case NLPID_CLNP:
747  if (!clnp_print(ndo, p, length))
748  print_unknown_data(ndo, p, "\n\t", length);
749  break;
750 
751  case NLPID_ESIS:
752  esis_print(ndo, p, length);
753  return;
754 
755  case NLPID_ISIS:
756  if (!isis_print(ndo, p, length))
757  print_unknown_data(ndo, p, "\n\t", length);
758  break;
759 
760  case NLPID_NULLNS:
761  ND_PRINT("%slength: %u", ndo->ndo_eflag ? "" : ", ", length);
762  break;
763 
764  case NLPID_Q933:
765  q933_print(ndo, p + 1, length - 1);
766  break;
767 
768  case NLPID_IP:
769  ip_print(ndo, p + 1, length - 1);
770  break;
771 
772  case NLPID_IP6:
773  ip6_print(ndo, p + 1, length - 1);
774  break;
775 
776  case NLPID_PPP:
777  ppp_print(ndo, p + 1, length - 1);
778  break;
779 
780  default:
781  if (!ndo->ndo_eflag)
782  ND_PRINT("OSI NLPID 0x%02x unknown", GET_U_1(p));
783  ND_PRINT("%slength: %u", ndo->ndo_eflag ? "" : ", ", length);
784  if (length > 1)
785  print_unknown_data(ndo, p, "\n\t", length);
786  break;
787  }
788 }
789 
790 #define CLNP_PDU_ER 1
791 #define CLNP_PDU_DT 28
792 #define CLNP_PDU_MD 29
793 #define CLNP_PDU_ERQ 30
794 #define CLNP_PDU_ERP 31
795 
796 static const struct tok clnp_pdu_values[] = {
797  { CLNP_PDU_ER, "Error Report"},
798  { CLNP_PDU_MD, "MD"},
799  { CLNP_PDU_DT, "Data"},
800  { CLNP_PDU_ERQ, "Echo Request"},
801  { CLNP_PDU_ERP, "Echo Response"},
802  { 0, NULL }
803 };
804 
809  nd_uint8_t lifetime; /* units of 500ms */
813 };
814 
819 };
820 
821 /*
822  * clnp_print
823  * Decode CLNP packets. Return 0 on error.
824  */
825 
826 static int
828  const uint8_t *pptr, u_int length)
829 {
830  const uint8_t *optr,*source_address,*dest_address;
831  u_int li,li_remaining,tlen,nsap_offset,source_address_length,dest_address_length, clnp_pdu_type, clnp_flags;
832  const struct clnp_header_t *clnp_header;
833  const struct clnp_segment_header_t *clnp_segment_header;
834  uint8_t rfd_error,rfd_error_major,rfd_error_minor;
835 
836  ndo->ndo_protocol = "clnp";
837  clnp_header = (const struct clnp_header_t *) pptr;
838  ND_TCHECK_SIZE(clnp_header);
839 
840  li = GET_U_1(clnp_header->length_indicator);
841  li_remaining = li;
842  optr = pptr;
843 
844  if (!ndo->ndo_eflag)
846 
847  /*
848  * Sanity checking of the header.
849  */
850 
851  if (GET_U_1(clnp_header->version) != CLNP_VERSION) {
852  ND_PRINT("version %u packet not supported",
853  GET_U_1(clnp_header->version));
854  return (0);
855  }
856 
857  if (li > length) {
858  ND_PRINT(" length indicator(%u) > PDU size (%u)!", li, length);
859  return (0);
860  }
861 
862  if (li < sizeof(struct clnp_header_t)) {
863  ND_PRINT(" length indicator %u < min PDU size:", li);
864  while (pptr < ndo->ndo_snapend) {
865  ND_PRINT("%02X", GET_U_1(pptr));
866  pptr++;
867  }
868  return (0);
869  }
870 
871  /* FIXME further header sanity checking */
872 
873  clnp_pdu_type = GET_U_1(clnp_header->type) & CLNP_PDU_TYPE_MASK;
874  clnp_flags = GET_U_1(clnp_header->type) & CLNP_FLAG_MASK;
875 
876  pptr += sizeof(struct clnp_header_t);
877  li_remaining -= sizeof(struct clnp_header_t);
878 
879  if (li_remaining < 1) {
880  ND_PRINT("li < size of fixed part of CLNP header and addresses");
881  return (0);
882  }
883  dest_address_length = GET_U_1(pptr);
884  pptr += 1;
885  li_remaining -= 1;
886  if (li_remaining < dest_address_length) {
887  ND_PRINT("li < size of fixed part of CLNP header and addresses");
888  return (0);
889  }
890  ND_TCHECK_LEN(pptr, dest_address_length);
891  dest_address = pptr;
892  pptr += dest_address_length;
893  li_remaining -= dest_address_length;
894 
895  if (li_remaining < 1) {
896  ND_PRINT("li < size of fixed part of CLNP header and addresses");
897  return (0);
898  }
899  source_address_length = GET_U_1(pptr);
900  pptr += 1;
901  li_remaining -= 1;
902  if (li_remaining < source_address_length) {
903  ND_PRINT("li < size of fixed part of CLNP header and addresses");
904  return (0);
905  }
906  ND_TCHECK_LEN(pptr, source_address_length);
907  source_address = pptr;
908  pptr += source_address_length;
909  li_remaining -= source_address_length;
910 
911  if (ndo->ndo_vflag < 1) {
912  ND_PRINT("%s%s > %s, %s, length %u",
913  ndo->ndo_eflag ? "" : ", ",
914  GET_ISONSAP_STRING(source_address, source_address_length),
915  GET_ISONSAP_STRING(dest_address, dest_address_length),
916  tok2str(clnp_pdu_values,"unknown (%u)",clnp_pdu_type),
917  length);
918  return (1);
919  }
920  ND_PRINT("%slength %u", ndo->ndo_eflag ? "" : ", ", length);
921 
922  ND_PRINT("\n\t%s PDU, hlen: %u, v: %u, lifetime: %u.%us, Segment PDU length: %u, checksum: 0x%04x",
923  tok2str(clnp_pdu_values, "unknown (%u)",clnp_pdu_type),
924  GET_U_1(clnp_header->length_indicator),
925  GET_U_1(clnp_header->version),
926  GET_U_1(clnp_header->lifetime)/2,
927  (GET_U_1(clnp_header->lifetime)%2)*5,
928  GET_BE_U_2(clnp_header->segment_length),
929  GET_BE_U_2(clnp_header->cksum));
930 
931  osi_print_cksum(ndo, optr, GET_BE_U_2(clnp_header->cksum), 7,
932  GET_U_1(clnp_header->length_indicator));
933 
934  ND_PRINT("\n\tFlags [%s]",
935  bittok2str(clnp_flag_values, "none", clnp_flags));
936 
937  ND_PRINT("\n\tsource address (length %u): %s\n\tdest address (length %u): %s",
938  source_address_length,
939  GET_ISONSAP_STRING(source_address, source_address_length),
940  dest_address_length,
941  GET_ISONSAP_STRING(dest_address, dest_address_length));
942 
943  if (clnp_flags & CLNP_SEGMENT_PART) {
944  if (li_remaining < sizeof(struct clnp_segment_header_t)) {
945  ND_PRINT("li < size of fixed part of CLNP header, addresses, and segment part");
946  return (0);
947  }
948  clnp_segment_header = (const struct clnp_segment_header_t *) pptr;
949  ND_TCHECK_SIZE(clnp_segment_header);
950  ND_PRINT("\n\tData Unit ID: 0x%04x, Segment Offset: %u, Total PDU Length: %u",
951  GET_BE_U_2(clnp_segment_header->data_unit_id),
952  GET_BE_U_2(clnp_segment_header->segment_offset),
953  GET_BE_U_2(clnp_segment_header->total_length));
954  pptr+=sizeof(struct clnp_segment_header_t);
955  li_remaining-=sizeof(struct clnp_segment_header_t);
956  }
957 
958  /* now walk the options */
959  while (li_remaining != 0) {
960  u_int op, opli;
961  const uint8_t *tptr;
962 
963  if (li_remaining < 2) {
964  ND_PRINT(", bad opts/li");
965  return (0);
966  }
967  op = GET_U_1(pptr);
968  opli = GET_U_1(pptr + 1);
969  pptr += 2;
970  li_remaining -= 2;
971  if (opli > li_remaining) {
972  ND_PRINT(", opt (%u) too long", op);
973  return (0);
974  }
975  ND_TCHECK_LEN(pptr, opli);
976  li_remaining -= opli;
977  tptr = pptr;
978  tlen = opli;
979 
980  ND_PRINT("\n\t %s Option #%u, length %u, value: ",
981  tok2str(clnp_option_values,"Unknown",op),
982  op,
983  opli);
984 
985  /*
986  * We've already checked that the entire option is present
987  * in the captured packet with the ND_TCHECK_LEN() call.
988  * Therefore, we don't need to do ND_TCHECK()/ND_TCHECK_LEN()
989  * checks.
990  * We do, however, need to check tlen, to make sure we
991  * don't run past the end of the option.
992  */
993  switch (op) {
994 
995 
996  case CLNP_OPTION_ROUTE_RECORDING: /* those two options share the format */
998  if (tlen < 2) {
999  ND_PRINT(", bad opt len");
1000  return (0);
1001  }
1002  ND_PRINT("%s %s",
1003  tok2str(clnp_option_sr_rr_values,"Unknown",GET_U_1(tptr)),
1004  tok2str(clnp_option_sr_rr_string_values, "Unknown Option %u", op));
1005  nsap_offset=GET_U_1(tptr + 1);
1006  if (nsap_offset == 0) {
1007  ND_PRINT(" Bad NSAP offset (0)");
1008  break;
1009  }
1010  nsap_offset-=1; /* offset to nsap list */
1011  if (nsap_offset > tlen) {
1012  ND_PRINT(" Bad NSAP offset (past end of option)");
1013  break;
1014  }
1015  tptr+=nsap_offset;
1016  tlen-=nsap_offset;
1017  while (tlen > 0) {
1018  source_address_length=GET_U_1(tptr);
1019  if (tlen < source_address_length+1) {
1020  ND_PRINT("\n\t NSAP address goes past end of option");
1021  break;
1022  }
1023  if (source_address_length > 0) {
1024  source_address=(tptr+1);
1025  ND_PRINT("\n\t NSAP address (length %u): %s",
1026  source_address_length,
1027  GET_ISONSAP_STRING(source_address, source_address_length));
1028  }
1029  tlen-=source_address_length+1;
1030  }
1031  break;
1032 
1033  case CLNP_OPTION_PRIORITY:
1034  if (tlen < 1) {
1035  ND_PRINT(", bad opt len");
1036  return (0);
1037  }
1038  ND_PRINT("0x%1x", GET_U_1(tptr)&0x0f);
1039  break;
1040 
1042  if (tlen < 1) {
1043  ND_PRINT(", bad opt len");
1044  return (0);
1045  }
1046  ND_PRINT("\n\t Format Code: %s",
1048 
1050  ND_PRINT("\n\t QoS Flags [%s]",
1052  "none",
1054  break;
1055 
1056  case CLNP_OPTION_SECURITY:
1057  if (tlen < 2) {
1058  ND_PRINT(", bad opt len");
1059  return (0);
1060  }
1061  ND_PRINT("\n\t Format Code: %s, Security-Level %u",
1063  GET_U_1(tptr + 1));
1064  break;
1065 
1067  if (tlen < 1) {
1068  ND_PRINT(", bad opt len");
1069  return (0);
1070  }
1071  rfd_error = GET_U_1(tptr);
1072  rfd_error_major = (rfd_error&0xf0) >> 4;
1073  rfd_error_minor = rfd_error&0x0f;
1074  ND_PRINT("\n\t Class: %s Error (0x%01x), %s (0x%01x)",
1075  tok2str(clnp_option_rfd_class_values,"Unknown",rfd_error_major),
1076  rfd_error_major,
1077  tok2str(clnp_option_rfd_error_class[rfd_error_major],"Unknown",rfd_error_minor),
1078  rfd_error_minor);
1079  break;
1080 
1081  case CLNP_OPTION_PADDING:
1082  ND_PRINT("padding data");
1083  break;
1084 
1085  /*
1086  * FIXME those are the defined Options that lack a decoder
1087  * you are welcome to contribute code ;-)
1088  */
1089 
1090  default:
1091  print_unknown_data(ndo, tptr, "\n\t ", opli);
1092  break;
1093  }
1094  if (ndo->ndo_vflag > 1)
1095  print_unknown_data(ndo, pptr, "\n\t ", opli);
1096  pptr += opli;
1097  }
1098 
1099  switch (clnp_pdu_type) {
1100 
1101  case CLNP_PDU_ER: /* fall through */
1102  case CLNP_PDU_ERP:
1103  if (GET_U_1(pptr) == NLPID_CLNP) {
1104  ND_PRINT("\n\t-----original packet-----\n\t");
1105  /* FIXME recursion protection */
1106  clnp_print(ndo, pptr, length - li);
1107  break;
1108  }
1109 
1110  /* The cases above break from the switch block if they see and print
1111  * a CLNP header in the Data part. For an Error Report PDU this is
1112  * described in Section 7.9.6 of ITU X.233 (1997 E), also known as
1113  * ISO/IEC 8473-1:1998(E). It is not clear why in this code the same
1114  * applies to an Echo Response PDU, as the standard does not specify
1115  * the contents -- could be a proprietary extension or a bug. In either
1116  * case, if the Data part does not contain a CLNP header, its structure
1117  * is considered unknown and the decoding falls through to print the
1118  * contents as-is.
1119  */
1121 
1122  case CLNP_PDU_DT:
1123  case CLNP_PDU_MD:
1124  case CLNP_PDU_ERQ:
1125 
1126  default:
1127  /* dump the PDU specific data */
1128  if (length > ND_BYTES_BETWEEN(pptr, optr)) {
1129  ND_PRINT("\n\t undecoded non-header data, length %u", length-li);
1130  print_unknown_data(ndo, pptr, "\n\t ", length - ND_BYTES_BETWEEN(pptr, optr));
1131  }
1132  }
1133 
1134  return (1);
1135 
1136  trunc:
1137  nd_print_trunc(ndo);
1138  return (1);
1139 
1140 }
1141 
1142 
1143 #define ESIS_PDU_REDIRECT 6
1144 #define ESIS_PDU_ESH 2
1145 #define ESIS_PDU_ISH 4
1146 
1147 static const struct tok esis_pdu_values[] = {
1148  { ESIS_PDU_REDIRECT, "redirect"},
1149  { ESIS_PDU_ESH, "ESH"},
1150  { ESIS_PDU_ISH, "ISH"},
1151  { 0, NULL }
1152 };
1153 
1162 };
1163 
1164 static void
1166  const uint8_t *pptr, u_int length)
1167 {
1168  const uint8_t *optr;
1169  u_int li, version, esis_pdu_type, source_address_length, source_address_number;
1170  const struct esis_header_t *esis_header;
1171 
1172  ndo->ndo_protocol = "esis";
1173  if (!ndo->ndo_eflag)
1174  ND_PRINT("ES-IS");
1175 
1176  if (length <= 2) {
1177  ND_PRINT(ndo->ndo_qflag ? "bad pkt!" : "no header at all!");
1178  return;
1179  }
1180 
1181  esis_header = (const struct esis_header_t *) pptr;
1182  ND_TCHECK_SIZE(esis_header);
1183  li = GET_U_1(esis_header->length_indicator);
1184  optr = pptr;
1185 
1186  /*
1187  * Sanity checking of the header.
1188  */
1189 
1190  if (GET_U_1(esis_header->nlpid) != NLPID_ESIS) {
1191  ND_PRINT(" nlpid 0x%02x packet not supported",
1192  GET_U_1(esis_header->nlpid));
1193  return;
1194  }
1195 
1196  version = GET_U_1(esis_header->version);
1197  if (version != ESIS_VERSION) {
1198  ND_PRINT(" version %u packet not supported", version);
1199  return;
1200  }
1201 
1202  if (li > length) {
1203  ND_PRINT(" length indicator(%u) > PDU size (%u)!", li, length);
1204  return;
1205  }
1206 
1207  if (li < sizeof(struct esis_header_t) + 2) {
1208  ND_PRINT(" length indicator %u < min PDU size:", li);
1209  while (pptr < ndo->ndo_snapend) {
1210  ND_PRINT("%02X", GET_U_1(pptr));
1211  pptr++;
1212  }
1213  return;
1214  }
1215 
1216  esis_pdu_type = GET_U_1(esis_header->type) & ESIS_PDU_TYPE_MASK;
1217 
1218  if (ndo->ndo_vflag < 1) {
1219  ND_PRINT("%s%s, length %u",
1220  ndo->ndo_eflag ? "" : ", ",
1221  tok2str(esis_pdu_values,"unknown type (%u)",esis_pdu_type),
1222  length);
1223  return;
1224  } else
1225  ND_PRINT("%slength %u\n\t%s (%u)",
1226  ndo->ndo_eflag ? "" : ", ",
1227  length,
1228  tok2str(esis_pdu_values,"unknown type: %u", esis_pdu_type),
1229  esis_pdu_type);
1230 
1231  ND_PRINT(", v: %u%s", version, version == ESIS_VERSION ? "" : "unsupported" );
1232  ND_PRINT(", checksum: 0x%04x", GET_BE_U_2(esis_header->cksum));
1233 
1234  osi_print_cksum(ndo, pptr, GET_BE_U_2(esis_header->cksum), 7,
1235  li);
1236 
1237  ND_PRINT(", holding time: %us, length indicator: %u",
1238  GET_BE_U_2(esis_header->holdtime), li);
1239 
1240  if (ndo->ndo_vflag > 1)
1241  print_unknown_data(ndo, optr, "\n\t", sizeof(struct esis_header_t));
1242 
1243  pptr += sizeof(struct esis_header_t);
1244  li -= sizeof(struct esis_header_t);
1245 
1246  switch (esis_pdu_type) {
1247  case ESIS_PDU_REDIRECT: {
1248  const uint8_t *dst, *snpa, *neta;
1249  u_int dstl, snpal, netal;
1250 
1251  ND_TCHECK_1(pptr);
1252  if (li < 1) {
1253  ND_PRINT(", bad redirect/li");
1254  return;
1255  }
1256  dstl = GET_U_1(pptr);
1257  pptr++;
1258  li--;
1259  ND_TCHECK_LEN(pptr, dstl);
1260  if (li < dstl) {
1261  ND_PRINT(", bad redirect/li");
1262  return;
1263  }
1264  dst = pptr;
1265  pptr += dstl;
1266  li -= dstl;
1267  ND_PRINT("\n\t %s", GET_ISONSAP_STRING(dst, dstl));
1268 
1269  ND_TCHECK_1(pptr);
1270  if (li < 1) {
1271  ND_PRINT(", bad redirect/li");
1272  return;
1273  }
1274  snpal = GET_U_1(pptr);
1275  pptr++;
1276  li--;
1277  ND_TCHECK_LEN(pptr, snpal);
1278  if (li < snpal) {
1279  ND_PRINT(", bad redirect/li");
1280  return;
1281  }
1282  snpa = pptr;
1283  pptr += snpal;
1284  li -= snpal;
1285  ND_TCHECK_1(pptr);
1286  if (li < 1) {
1287  ND_PRINT(", bad redirect/li");
1288  return;
1289  }
1290  netal = GET_U_1(pptr);
1291  pptr++;
1292  ND_TCHECK_LEN(pptr, netal);
1293  if (li < netal) {
1294  ND_PRINT(", bad redirect/li");
1295  return;
1296  }
1297  neta = pptr;
1298  pptr += netal;
1299  li -= netal;
1300 
1301  if (snpal == MAC_ADDR_LEN)
1302  ND_PRINT("\n\t SNPA (length: %u): %s",
1303  snpal,
1304  GET_ETHERADDR_STRING(snpa));
1305  else
1306  ND_PRINT("\n\t SNPA (length: %u): %s",
1307  snpal,
1308  GET_LINKADDR_STRING(snpa, LINKADDR_OTHER, snpal));
1309  if (netal != 0)
1310  ND_PRINT("\n\t NET (length: %u) %s",
1311  netal,
1312  GET_ISONSAP_STRING(neta, netal));
1313  break;
1314  }
1315 
1316  case ESIS_PDU_ESH:
1317  ND_TCHECK_1(pptr);
1318  if (li < 1) {
1319  ND_PRINT(", bad esh/li");
1320  return;
1321  }
1322  source_address_number = GET_U_1(pptr);
1323  pptr++;
1324  li--;
1325 
1326  ND_PRINT("\n\t Number of Source Addresses: %u", source_address_number);
1327 
1328  while (source_address_number > 0) {
1329  ND_TCHECK_1(pptr);
1330  if (li < 1) {
1331  ND_PRINT(", bad esh/li");
1332  return;
1333  }
1334  source_address_length = GET_U_1(pptr);
1335  pptr++;
1336  li--;
1337 
1338  ND_TCHECK_LEN(pptr, source_address_length);
1339  if (li < source_address_length) {
1340  ND_PRINT(", bad esh/li");
1341  return;
1342  }
1343  ND_PRINT("\n\t NET (length: %u): %s",
1344  source_address_length,
1345  GET_ISONSAP_STRING(pptr, source_address_length));
1346  pptr += source_address_length;
1347  li -= source_address_length;
1348  source_address_number--;
1349  }
1350 
1351  break;
1352 
1353  case ESIS_PDU_ISH: {
1354  ND_TCHECK_1(pptr);
1355  if (li < 1) {
1356  ND_PRINT(", bad ish/li");
1357  return;
1358  }
1359  source_address_length = GET_U_1(pptr);
1360  pptr++;
1361  li--;
1362  ND_TCHECK_LEN(pptr, source_address_length);
1363  if (li < source_address_length) {
1364  ND_PRINT(", bad ish/li");
1365  return;
1366  }
1367  ND_PRINT("\n\t NET (length: %u): %s", source_address_length, GET_ISONSAP_STRING(pptr, source_address_length));
1368  pptr += source_address_length;
1369  li -= source_address_length;
1370  break;
1371  }
1372 
1373  default:
1374  if (ndo->ndo_vflag <= 1) {
1375  /*
1376  * If there's at least one byte to print, print
1377  * it/them.
1378  */
1379  if (ND_TTEST_LEN(pptr, 1))
1380  print_unknown_data(ndo, pptr, "\n\t ", ND_BYTES_AVAILABLE_AFTER(pptr));
1381  }
1382  return;
1383  }
1384 
1385  /* now walk the options */
1386  while (li != 0) {
1387  u_int op, opli;
1388  const uint8_t *tptr;
1389 
1390  if (li < 2) {
1391  ND_PRINT(", bad opts/li");
1392  return;
1393  }
1394  op = GET_U_1(pptr);
1395  opli = GET_U_1(pptr + 1);
1396  pptr += 2;
1397  li -= 2;
1398  if (opli > li) {
1399  ND_PRINT(", opt (%u) too long", op);
1400  return;
1401  }
1402  li -= opli;
1403  tptr = pptr;
1404 
1405  ND_PRINT("\n\t %s Option #%u, length %u, value: ",
1406  tok2str(esis_option_values,"Unknown",op),
1407  op,
1408  opli);
1409 
1410  switch (op) {
1411 
1413  if (opli == 2) {
1414  ND_TCHECK_2(pptr);
1415  ND_PRINT("%us", GET_BE_U_2(tptr));
1416  } else
1417  ND_PRINT("(bad length)");
1418  break;
1419 
1420  case ESIS_OPTION_PROTOCOLS:
1421  while (opli>0) {
1422  ND_PRINT("%s (0x%02x)",
1424  "unknown",
1425  GET_U_1(tptr)),
1426  GET_U_1(tptr));
1427  if (opli>1) /* further NPLIDs ? - put comma */
1428  ND_PRINT(", ");
1429  tptr++;
1430  opli--;
1431  }
1432  break;
1433 
1434  /*
1435  * FIXME those are the defined Options that lack a decoder
1436  * you are welcome to contribute code ;-)
1437  */
1438 
1440  case ESIS_OPTION_SECURITY:
1441  case ESIS_OPTION_PRIORITY:
1443  case ESIS_OPTION_SNPA_MASK:
1444 
1445  default:
1446  print_unknown_data(ndo, tptr, "\n\t ", opli);
1447  break;
1448  }
1449  if (ndo->ndo_vflag > 1)
1450  print_unknown_data(ndo, pptr, "\n\t ", opli);
1451  pptr += opli;
1452  }
1453  return;
1454 
1455 trunc:
1456  nd_print_trunc(ndo);
1457 }
1458 
1459 static void
1461  const struct isis_spb_mcid *mcid)
1462 {
1463  int i;
1464 
1465  ND_TCHECK_SIZE(mcid);
1466  ND_PRINT("ID: %u, Name: ", GET_U_1(mcid->format_id));
1467 
1468  nd_printjnp(ndo, mcid->name, sizeof(mcid->name));
1469 
1470  ND_PRINT("\n\t Lvl: %u", GET_BE_U_2(mcid->revision_lvl));
1471 
1472  ND_PRINT(", Digest: ");
1473 
1474  for(i=0;i<16;i++)
1475  ND_PRINT("%.2x ", mcid->digest[i]);
1476  return;
1477 
1478 trunc:
1479  nd_print_trunc(ndo);
1480 }
1481 
1482 static int
1484  const uint8_t *tptr, u_int len)
1485 {
1486  u_int stlv_type, stlv_len;
1487  const struct isis_subtlv_spb_mcid *subtlv_spb_mcid;
1488  int i;
1489 
1490  while (len > 2)
1491  {
1492  stlv_type = GET_U_1(tptr);
1493  stlv_len = GET_U_1(tptr + 1);
1494 
1495  /* first lets see if we know the subTLVs name*/
1496  ND_PRINT("\n\t %s subTLV #%u, length: %u",
1497  tok2str(isis_mt_port_cap_subtlv_values, "unknown", stlv_type),
1498  stlv_type,
1499  stlv_len);
1500 
1501  tptr += 2;
1502  /*len -= TLV_TYPE_LEN_OFFSET;*/
1503  len -= 2;
1504 
1505  /* Make sure the subTLV fits within the space left */
1506  if (len < stlv_len)
1507  goto subtlv_too_long;
1508  /* Make sure the entire subTLV is in the captured data */
1509  ND_TCHECK_LEN(tptr, stlv_len);
1510 
1511  switch (stlv_type)
1512  {
1513  case ISIS_SUBTLV_SPB_MCID:
1514  {
1515  if (stlv_len < ISIS_SUBTLV_SPB_MCID_MIN_LEN)
1516  goto subtlv_too_short;
1517 
1518  subtlv_spb_mcid = (const struct isis_subtlv_spb_mcid *)tptr;
1519 
1520  ND_PRINT("\n\t MCID: ");
1521  isis_print_mcid(ndo, &(subtlv_spb_mcid->mcid));
1522 
1523  /*tptr += SPB_MCID_MIN_LEN;
1524  len -= SPB_MCID_MIN_LEN; */
1525 
1526  ND_PRINT("\n\t AUX-MCID: ");
1527  isis_print_mcid(ndo, &(subtlv_spb_mcid->aux_mcid));
1528 
1529  /*tptr += SPB_MCID_MIN_LEN;
1530  len -= SPB_MCID_MIN_LEN; */
1533  stlv_len -= ISIS_SUBTLV_SPB_MCID_MIN_LEN;
1534 
1535  break;
1536  }
1537 
1539  {
1540  if (stlv_len < ISIS_SUBTLV_SPB_DIGEST_MIN_LEN)
1541  goto subtlv_too_short;
1542 
1543  ND_PRINT("\n\t RES: %u V: %u A: %u D: %u",
1544  (GET_U_1(tptr) >> 5),
1545  ((GET_U_1(tptr) >> 4) & 0x01),
1546  ((GET_U_1(tptr) >> 2) & 0x03),
1547  (GET_U_1(tptr) & 0x03));
1548 
1549  tptr++;
1550 
1551  ND_PRINT("\n\t Digest: ");
1552 
1553  for(i=1;i<=8; i++)
1554  {
1555  ND_PRINT("%08x ", GET_BE_U_4(tptr));
1556  if (i%4 == 0 && i != 8)
1557  ND_PRINT("\n\t ");
1558  tptr += 4;
1559  }
1560 
1562  stlv_len -= ISIS_SUBTLV_SPB_DIGEST_MIN_LEN;
1563 
1564  break;
1565  }
1566 
1567  case ISIS_SUBTLV_SPB_BVID:
1568  {
1569  while (stlv_len != 0)
1570  {
1571  if (stlv_len < 4)
1572  goto subtlv_too_short;
1573  ND_PRINT("\n\t ECT: %08x",
1574  GET_BE_U_4(tptr));
1575 
1576  tptr += 4;
1577  len -= 4;
1578  stlv_len -= 4;
1579 
1580  if (stlv_len < 2)
1581  goto subtlv_too_short;
1582  ND_PRINT(" BVID: %u, U:%01x M:%01x ",
1583  (GET_BE_U_2(tptr) >> 4) ,
1584  (GET_BE_U_2(tptr) >> 3) & 0x01,
1585  (GET_BE_U_2(tptr) >> 2) & 0x01);
1586 
1587  tptr += 2;
1588  len -= 2;
1589  stlv_len -= 2;
1590  }
1591 
1592  break;
1593  }
1594 
1595  default:
1596  break;
1597  }
1598  tptr += stlv_len;
1599  len -= stlv_len;
1600  }
1601  return (0);
1602 
1603 trunc:
1604  nd_print_trunc(ndo);
1605  return (1);
1606 
1607 subtlv_too_long:
1608  ND_PRINT(" (> containing TLV length)");
1609  return (1);
1610 
1611 subtlv_too_short:
1612  ND_PRINT(" (too short)");
1613  return (1);
1614 }
1615 
1616 static int
1618  const uint8_t *tptr, u_int len)
1619 {
1620  u_int stlv_type, stlv_len, treecount;
1621 
1622  while (len > 2)
1623  {
1624  stlv_type = GET_U_1(tptr);
1625  stlv_len = GET_U_1(tptr + 1);
1626  tptr += 2;
1627  len -= 2;
1628 
1629  /* first lets see if we know the subTLVs name*/
1630  ND_PRINT("\n\t %s subTLV #%u, length: %u",
1631  tok2str(isis_mt_capability_subtlv_values, "unknown", stlv_type),
1632  stlv_type,
1633  stlv_len);
1634 
1635  /* Make sure the subTLV fits within the space left */
1636  if (len < stlv_len)
1637  goto subtlv_too_long;
1638  /* Make sure the entire subTLV is in the captured data */
1639  ND_TCHECK_LEN(tptr, stlv_len);
1640 
1641  switch (stlv_type)
1642  {
1644  if (stlv_len < ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN)
1645  goto subtlv_too_short;
1646 
1647  ND_PRINT("\n\t CIST Root-ID: %08x", GET_BE_U_4(tptr));
1648  tptr += 4;
1649  ND_PRINT(" %08x", GET_BE_U_4(tptr));
1650  tptr += 4;
1651  ND_PRINT(", Path Cost: %08x", GET_BE_U_4(tptr));
1652  tptr += 4;
1653  ND_PRINT(", Prio: %u", GET_BE_U_2(tptr));
1654  tptr += 2;
1655  ND_PRINT("\n\t RES: %u",
1656  GET_BE_U_2(tptr) >> 5);
1657  ND_PRINT(", V: %u",
1658  (GET_BE_U_2(tptr) >> 4) & 0x0001);
1659  ND_PRINT(", SPSource-ID: %u",
1660  (GET_BE_U_4(tptr) & 0x000fffff));
1661  tptr += 4;
1662  ND_PRINT(", No of Trees: %x", GET_U_1(tptr));
1663 
1664  treecount = GET_U_1(tptr);
1665  tptr++;
1666 
1669 
1670  while (treecount)
1671  {
1673  goto trunc;
1674 
1675  ND_PRINT("\n\t U:%u, M:%u, A:%u, RES:%u",
1676  GET_U_1(tptr) >> 7,
1677  (GET_U_1(tptr) >> 6) & 0x01,
1678  (GET_U_1(tptr) >> 5) & 0x01,
1679  (GET_U_1(tptr) & 0x1f));
1680 
1681  tptr++;
1682 
1683  ND_PRINT(", ECT: %08x", GET_BE_U_4(tptr));
1684 
1685  tptr += 4;
1686 
1687  ND_PRINT(", BVID: %u, SPVID: %u",
1688  (GET_BE_U_3(tptr) >> 12) & 0x000fff,
1689  GET_BE_U_3(tptr) & 0x000fff);
1690 
1691  tptr += 3;
1694  treecount--;
1695  }
1696 
1697  break;
1698 
1699  case ISIS_SUBTLV_SPBM_SI:
1700  if (stlv_len < 8)
1701  goto trunc;
1702 
1703  ND_PRINT("\n\t BMAC: %08x", GET_BE_U_4(tptr));
1704  tptr += 4;
1705  ND_PRINT("%04x", GET_BE_U_2(tptr));
1706  tptr += 2;
1707 
1708  ND_PRINT(", RES: %u, VID: %u", GET_BE_U_2(tptr) >> 12,
1709  (GET_BE_U_2(tptr)) & 0x0fff);
1710 
1711  tptr += 2;
1712  len -= 8;
1713  stlv_len -= 8;
1714 
1715  while (stlv_len >= 4) {
1716  ND_PRINT("\n\t T: %u, R: %u, RES: %u, ISID: %u",
1717  (GET_BE_U_4(tptr) >> 31),
1718  (GET_BE_U_4(tptr) >> 30) & 0x01,
1719  (GET_BE_U_4(tptr) >> 24) & 0x03f,
1720  (GET_BE_U_4(tptr)) & 0x0ffffff);
1721 
1722  tptr += 4;
1723  len -= 4;
1724  stlv_len -= 4;
1725  }
1726 
1727  break;
1728 
1729  default:
1730  break;
1731  }
1732  tptr += stlv_len;
1733  len -= stlv_len;
1734  }
1735  return (0);
1736 
1737 trunc:
1738  nd_print_trunc(ndo);
1739  return (1);
1740 
1741 subtlv_too_long:
1742  ND_PRINT(" (> containing TLV length)");
1743  return (1);
1744 
1745 subtlv_too_short:
1746  ND_PRINT(" (too short)");
1747  return (1);
1748 }
1749 
1750 /* shared routine for printing system, node and lsp-ids */
1751 static char *
1752 isis_print_id(netdissect_options *ndo, const uint8_t *cp, u_int id_len)
1753 {
1754  u_int i;
1755  static char id[sizeof("xxxx.xxxx.xxxx.yy-zz")];
1756  char *pos = id;
1757  u_int sysid_len;
1758 
1759  sysid_len = SYSTEM_ID_LEN;
1760  if (sysid_len > id_len)
1761  sysid_len = id_len;
1762  for (i = 1; i <= sysid_len; i++) {
1763  snprintf(pos, sizeof(id) - (pos - id), "%02x", GET_U_1(cp));
1764  cp++;
1765  pos += strlen(pos);
1766  if (i == 2 || i == 4)
1767  *pos++ = '.';
1768  }
1769  if (id_len >= NODE_ID_LEN) {
1770  snprintf(pos, sizeof(id) - (pos - id), ".%02x", GET_U_1(cp));
1771  cp++;
1772  pos += strlen(pos);
1773  }
1774  if (id_len == LSP_ID_LEN)
1775  snprintf(pos, sizeof(id) - (pos - id), "-%02x", GET_U_1(cp));
1776  return (id);
1777 }
1778 
1779 /* print the 4-byte metric block which is common found in the old-style TLVs */
1780 static int
1782  const struct isis_metric_block *isis_metric_block)
1783 {
1784  ND_PRINT(", Default Metric: %u, %s",
1786  ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_default) ? "External" : "Internal");
1788  ND_PRINT("\n\t\t Delay Metric: %u, %s",
1790  ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_delay) ? "External" : "Internal");
1792  ND_PRINT("\n\t\t Expense Metric: %u, %s",
1794  ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_expense) ? "External" : "Internal");
1796  ND_PRINT("\n\t\t Error Metric: %u, %s",
1798  ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_error) ? "External" : "Internal");
1799 
1800  return(1); /* everything is ok */
1801 }
1802 
1803 static int
1805  const uint8_t *cp, const char *ident, u_int length)
1806 {
1807  int prefix_len;
1808  const struct isis_tlv_ip_reach *tlv_ip_reach;
1809 
1810  tlv_ip_reach = (const struct isis_tlv_ip_reach *)cp;
1811 
1812  while (length > 0) {
1813  if ((size_t)length < sizeof(*tlv_ip_reach)) {
1814  ND_PRINT("short IPv4 Reachability (%u vs %zu)",
1815  length,
1816  sizeof(*tlv_ip_reach));
1817  return (0);
1818  }
1819 
1820  ND_TCHECK_SIZE(tlv_ip_reach);
1821 
1822  prefix_len = mask2plen(GET_IPV4_TO_HOST_ORDER(tlv_ip_reach->mask));
1823 
1824  if (prefix_len == -1)
1825  ND_PRINT("%sIPv4 prefix: %s mask %s",
1826  ident,
1827  GET_IPADDR_STRING(tlv_ip_reach->prefix),
1828  GET_IPADDR_STRING(tlv_ip_reach->mask));
1829  else
1830  ND_PRINT("%sIPv4 prefix: %15s/%u",
1831  ident,
1832  GET_IPADDR_STRING(tlv_ip_reach->prefix),
1833  prefix_len);
1834 
1835  ND_PRINT(", Distribution: %s, Metric: %u, %s",
1836  ISIS_LSP_TLV_METRIC_UPDOWN(tlv_ip_reach->isis_metric_block.metric_default) ? "down" : "up",
1838  ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_default) ? "External" : "Internal");
1839 
1841  ND_PRINT("%s Delay Metric: %u, %s",
1842  ident,
1844  ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_delay) ? "External" : "Internal");
1845 
1847  ND_PRINT("%s Expense Metric: %u, %s",
1848  ident,
1850  ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_expense) ? "External" : "Internal");
1851 
1853  ND_PRINT("%s Error Metric: %u, %s",
1854  ident,
1856  ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_error) ? "External" : "Internal");
1857 
1858  length -= sizeof(struct isis_tlv_ip_reach);
1859  tlv_ip_reach++;
1860  }
1861  return (1);
1862 trunc:
1863  return 0;
1864 }
1865 
1866 /*
1867  * this is the common IP-REACH subTLV decoder it is called
1868  * from various EXTD-IP REACH TLVs (135,235,236,237)
1869  */
1870 
1871 static int
1873  const uint8_t *tptr, u_int subt, u_int subl,
1874  const char *ident)
1875 {
1876  /* first lets see if we know the subTLVs name*/
1877  ND_PRINT("%s%s subTLV #%u, length: %u",
1878  ident, tok2str(isis_ext_ip_reach_subtlv_values, "unknown", subt),
1879  subt, subl);
1880 
1881  ND_TCHECK_LEN(tptr, subl);
1882 
1883  switch(subt) {
1884  case ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR: /* fall through */
1886  while (subl >= 4) {
1887  ND_PRINT(", 0x%08x (=%u)",
1888  GET_BE_U_4(tptr),
1889  GET_BE_U_4(tptr));
1890  tptr+=4;
1891  subl-=4;
1892  }
1893  break;
1895  while (subl >= 8) {
1896  ND_PRINT(", 0x%08x%08x",
1897  GET_BE_U_4(tptr),
1898  GET_BE_U_4(tptr + 4));
1899  tptr+=8;
1900  subl-=8;
1901  }
1902  break;
1904  {
1905  uint8_t algo, flags;
1906  uint32_t sid;
1907 
1908  flags = GET_U_1(tptr);
1909  algo = GET_U_1(tptr+1);
1910 
1911  if (flags & ISIS_PREFIX_SID_FLAG_V) {
1912  if (subl < 5)
1913  goto trunc;
1914  sid = GET_BE_U_3(tptr+2);
1915  tptr+=5;
1916  subl-=5;
1917  } else {
1918  if (subl < 6)
1919  goto trunc;
1920  sid = GET_BE_U_4(tptr+2);
1921  tptr+=6;
1922  subl-=6;
1923  }
1924 
1925  ND_PRINT(", Flags [%s], Algo %s (%u), %s %u",
1926  bittok2str(prefix_sid_flag_values, "None", flags),
1927  tok2str(prefix_sid_algo_values, "Unknown", algo), algo,
1928  flags & ISIS_PREFIX_SID_FLAG_V ? "label" : "index",
1929  sid);
1930  }
1931  break;
1932  default:
1933  if (!print_unknown_data(ndo, tptr, "\n\t\t ", subl))
1934  return(0);
1935  break;
1936  }
1937  return(1);
1938 
1939 trunc:
1940  nd_print_trunc(ndo);
1941  return(0);
1942 }
1943 
1944 /*
1945  * this is the common IS-REACH decoder it is called
1946  * from various EXTD-IS REACH style TLVs (22,24,222)
1947  */
1948 
1949 static int
1951  const uint8_t *tptr, const char *ident, u_int tlv_type,
1952  u_int tlv_remaining)
1953 {
1954  char ident_buffer[20];
1955  u_int subtlv_type,subtlv_len,subtlv_sum_len;
1956  int proc_bytes = 0; /* how many bytes did we process ? */
1957  u_int te_class,priority_level,gmpls_switch_cap;
1958  union { /* int to float conversion buffer for several subTLVs */
1959  float f;
1960  uint32_t i;
1961  } bw;
1962 
1963  ND_TCHECK_LEN(tptr, NODE_ID_LEN);
1964  if (tlv_remaining < NODE_ID_LEN)
1965  return(0);
1966 
1967  ND_PRINT("%sIS Neighbor: %s", ident, isis_print_id(ndo, tptr, NODE_ID_LEN));
1968  tptr+=NODE_ID_LEN;
1969  tlv_remaining-=NODE_ID_LEN;
1970  proc_bytes+=NODE_ID_LEN;
1971 
1972  if (tlv_type != ISIS_TLV_IS_ALIAS_ID) { /* the Alias TLV Metric field is implicit 0 */
1973  ND_TCHECK_3(tptr);
1974  if (tlv_remaining < 3)
1975  return(0);
1976  ND_PRINT(", Metric: %u", GET_BE_U_3(tptr));
1977  tptr+=3;
1978  tlv_remaining-=3;
1979  proc_bytes+=3;
1980  }
1981 
1982  ND_TCHECK_1(tptr);
1983  if (tlv_remaining < 1)
1984  return(0);
1985  subtlv_sum_len=GET_U_1(tptr); /* read out subTLV length */
1986  tptr++;
1987  tlv_remaining--;
1988  proc_bytes++;
1989  ND_PRINT(", %ssub-TLVs present",subtlv_sum_len ? "" : "no ");
1990  if (subtlv_sum_len) {
1991  ND_PRINT(" (%u)", subtlv_sum_len);
1992  /* prepend the indent string */
1993  snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident);
1994  ident = ident_buffer;
1995  while (subtlv_sum_len != 0) {
1996  ND_TCHECK_2(tptr);
1997  if (tlv_remaining < 2) {
1998  ND_PRINT("%sRemaining data in TLV shorter than a subTLV header",ident);
1999  proc_bytes += tlv_remaining;
2000  break;
2001  }
2002  if (subtlv_sum_len < 2) {
2003  ND_PRINT("%sRemaining data in subTLVs shorter than a subTLV header",ident);
2004  proc_bytes += subtlv_sum_len;
2005  break;
2006  }
2007  subtlv_type=GET_U_1(tptr);
2008  subtlv_len=GET_U_1(tptr + 1);
2009  tptr += 2;
2010  tlv_remaining -= 2;
2011  subtlv_sum_len -= 2;
2012  proc_bytes += 2;
2013  ND_PRINT("%s%s subTLV #%u, length: %u",
2014  ident, tok2str(isis_ext_is_reach_subtlv_values, "unknown", subtlv_type),
2015  subtlv_type, subtlv_len);
2016 
2017  if (subtlv_sum_len < subtlv_len) {
2018  ND_PRINT(" (remaining data in subTLVs shorter than the current subTLV)");
2019  proc_bytes += subtlv_sum_len;
2020  break;
2021  }
2022 
2023  if (tlv_remaining < subtlv_len) {
2024  ND_PRINT(" (> remaining tlv length)");
2025  proc_bytes += tlv_remaining;
2026  break;
2027  }
2028 
2029  ND_TCHECK_LEN(tptr, subtlv_len);
2030 
2031  switch(subtlv_type) {
2035  if (subtlv_len >= 4) {
2036  ND_PRINT(", 0x%08x", GET_BE_U_4(tptr));
2037  if (subtlv_len == 8) /* rfc4205 */
2038  ND_PRINT(", 0x%08x", GET_BE_U_4(tptr + 4));
2039  }
2040  break;
2043  if (subtlv_len >= sizeof(nd_ipv4))
2044  ND_PRINT(", %s", GET_IPADDR_STRING(tptr));
2045  break;
2048  if (subtlv_len >= 4) {
2049  bw.i = GET_BE_U_4(tptr);
2050  ND_PRINT(", %.3f Mbps", bw.f * 8 / 1000000);
2051  }
2052  break;
2054  if (subtlv_len >= 32) {
2055  for (te_class = 0; te_class < 8; te_class++) {
2056  bw.i = GET_BE_U_4(tptr);
2057  ND_PRINT("%s TE-Class %u: %.3f Mbps",
2058  ident,
2059  te_class,
2060  bw.f * 8 / 1000000);
2061  tptr += 4;
2062  subtlv_len -= 4;
2063  subtlv_sum_len -= 4;
2064  proc_bytes += 4;
2065  }
2066  }
2067  break;
2068  case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS: /* fall through */
2070  if (subtlv_len == 0)
2071  break;
2072  ND_PRINT("%sBandwidth Constraints Model ID: %s (%u)",
2073  ident,
2074  tok2str(diffserv_te_bc_values, "unknown", GET_U_1(tptr)),
2075  GET_U_1(tptr));
2076  tptr++;
2077  subtlv_len--;
2078  subtlv_sum_len--;
2079  proc_bytes++;
2080  /* decode BCs until the subTLV ends */
2081  for (te_class = 0; subtlv_len != 0; te_class++) {
2082  if (subtlv_len < 4)
2083  break;
2084  bw.i = GET_BE_U_4(tptr);
2085  ND_PRINT("%s Bandwidth constraint CT%u: %.3f Mbps",
2086  ident,
2087  te_class,
2088  bw.f * 8 / 1000000);
2089  tptr += 4;
2090  subtlv_len -= 4;
2091  subtlv_sum_len -= 4;
2092  proc_bytes += 4;
2093  }
2094  break;
2096  if (subtlv_len >= 3)
2097  ND_PRINT(", %u", GET_BE_U_3(tptr));
2098  break;
2100  if (subtlv_len == 2) {
2101  ND_PRINT(", [ %s ] (0x%04x)",
2103  "Unknown",
2104  GET_BE_U_2(tptr)),
2105  GET_BE_U_2(tptr));
2106  }
2107  break;
2109  if (subtlv_len >= 2) {
2110  ND_PRINT(", %s, Priority %u",
2111  bittok2str(gmpls_link_prot_values, "none", GET_U_1(tptr)),
2112  GET_U_1(tptr + 1));
2113  }
2114  break;
2116  if (subtlv_len >= 6) {
2117  ND_PRINT(", LM: %u", GET_BE_U_3(tptr));
2118  tptr += 3;
2119  subtlv_len -= 3;
2120  subtlv_sum_len -= 3;
2121  proc_bytes += 3;
2122  ND_PRINT(", P: %u", GET_U_1(tptr));
2123  tptr++;
2124  subtlv_len--;
2125  subtlv_sum_len--;
2126  proc_bytes++;
2127  ND_PRINT(", P-ID: %u", GET_BE_U_2(tptr));
2128  }
2129  break;
2131  if (subtlv_len >= 36) {
2132  gmpls_switch_cap = GET_U_1(tptr);
2133  ND_PRINT("%s Interface Switching Capability:%s",
2134  ident,
2135  tok2str(gmpls_switch_cap_values, "Unknown", gmpls_switch_cap));
2136  ND_PRINT(", LSP Encoding: %s",
2137  tok2str(gmpls_encoding_values, "Unknown", GET_U_1((tptr + 1))));
2138  tptr += 4;
2139  subtlv_len -= 4;
2140  subtlv_sum_len -= 4;
2141  proc_bytes += 4;
2142  ND_PRINT("%s Max LSP Bandwidth:", ident);
2143  for (priority_level = 0; priority_level < 8; priority_level++) {
2144  bw.i = GET_BE_U_4(tptr);
2145  ND_PRINT("%s priority level %u: %.3f Mbps",
2146  ident,
2147  priority_level,
2148  bw.f * 8 / 1000000);
2149  tptr += 4;
2150  subtlv_len -= 4;
2151  subtlv_sum_len -= 4;
2152  proc_bytes += 4;
2153  }
2154  switch (gmpls_switch_cap) {
2155  case GMPLS_PSC1:
2156  case GMPLS_PSC2:
2157  case GMPLS_PSC3:
2158  case GMPLS_PSC4:
2159  if (subtlv_len < 6)
2160  break;
2161  bw.i = GET_BE_U_4(tptr);
2162  ND_PRINT("%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000);
2163  ND_PRINT("%s Interface MTU: %u", ident,
2164  GET_BE_U_2(tptr + 4));
2165  break;
2166  case GMPLS_TSC:
2167  if (subtlv_len < 8)
2168  break;
2169  bw.i = GET_BE_U_4(tptr);
2170  ND_PRINT("%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000);
2171  ND_PRINT("%s Indication %s", ident,
2172  tok2str(gmpls_switch_cap_tsc_indication_values, "Unknown (%u)", GET_U_1((tptr + 4))));
2173  break;
2174  default:
2175  /* there is some optional stuff left to decode but this is as of yet
2176  not specified so just lets hexdump what is left */
2177  if (subtlv_len != 0) {
2178  if (!print_unknown_data(ndo, tptr, "\n\t\t ", subtlv_len))
2179  return(0);
2180  }
2181  }
2182  }
2183  break;
2185  if (subtlv_len >= 8) {
2186  ND_PRINT("%s Flags: [%s]", ident,
2188  "none",
2189  GET_U_1(tptr)));
2190  int vflag = (GET_U_1(tptr) & 0x20) ? 1:0;
2191  int lflag = (GET_U_1(tptr) & 0x10) ? 1:0;
2192  tptr++;
2193  subtlv_len--;
2194  subtlv_sum_len--;
2195  proc_bytes++;
2196  ND_PRINT("%s Weight: %u", ident, GET_U_1(tptr));
2197  tptr++;
2198  subtlv_len--;
2199  subtlv_sum_len--;
2200  proc_bytes++;
2201  if(subtlv_len>=SYSTEM_ID_LEN) {
2203  ND_PRINT("%s Neighbor System-ID: %s", ident,
2204  isis_print_id(ndo, tptr, SYSTEM_ID_LEN));
2205  }
2206  /* RFC 8667 section 2.2.2 */
2207  /* if V-flag is set to 1 and L-flag is set to 1 ==> 3 octet label */
2208  /* if V-flag is set to 0 and L-flag is set to 0 ==> 4 octet index */
2209  if (vflag && lflag) {
2210  ND_PRINT("%s Label: %u",
2211  ident, GET_BE_U_3(tptr+SYSTEM_ID_LEN));
2212  } else if ((!vflag) && (!lflag)) {
2213  ND_PRINT("%s Index: %u",
2214  ident, GET_BE_U_4(tptr+SYSTEM_ID_LEN));
2215  } else
2216  nd_print_invalid(ndo);
2217  }
2218  break;
2219  default:
2220  if (!print_unknown_data(ndo, tptr, "\n\t\t ", subtlv_len))
2221  return(0);
2222  break;
2223  }
2224 
2225  tptr += subtlv_len;
2226  tlv_remaining -= subtlv_len;
2227  subtlv_sum_len -= subtlv_len;
2228  proc_bytes += subtlv_len;
2229  }
2230  }
2231  return(proc_bytes);
2232 
2233 trunc:
2234  return(0);
2235 }
2236 
2237 /*
2238  * this is the common Multi Topology ID decoder
2239  * it is called from various MT-TLVs (222,229,235,237)
2240  */
2241 
2242 static uint8_t
2244  const uint8_t *tptr, const char *ident, u_int tlv_remaining)
2245 {
2246  if (tlv_remaining < 2)
2247  goto trunc;
2248 
2249  ND_PRINT("%s%s",
2250  ident,
2252  "Reserved for IETF Consensus",
2253  ISIS_MASK_MTID(GET_BE_U_2(tptr))));
2254 
2255  ND_PRINT(" Topology (0x%03x), Flags: [%s]",
2256  ISIS_MASK_MTID(GET_BE_U_2(tptr)),
2258 
2259  return(2);
2260 trunc:
2261  return 0;
2262 }
2263 
2264 /*
2265  * this is the common extended IP reach decoder
2266  * it is called from TLVs (135,235,236,237)
2267  * we process the TLV and optional subTLVs and return
2268  * the amount of processed bytes
2269  */
2270 
2271 static u_int
2273  const uint8_t *tptr, const char *ident, uint16_t afi)
2274 {
2275  char ident_buffer[20];
2276  uint8_t prefix[sizeof(nd_ipv6)]; /* shared copy buffer for IPv4 and IPv6 prefixes */
2277  u_int metric, status_byte, bit_length, byte_length, sublen, processed, subtlvtype, subtlvlen;
2278 
2279  metric = GET_BE_U_4(tptr);
2280  processed=4;
2281  tptr+=4;
2282 
2283  if (afi == AF_INET) {
2284  status_byte=GET_U_1(tptr);
2285  tptr++;
2286  bit_length = status_byte&0x3f;
2287  if (bit_length > 32) {
2288  ND_PRINT("%sIPv4 prefix: bad bit length %u",
2289  ident,
2290  bit_length);
2291  return (0);
2292  }
2293  processed++;
2294  } else if (afi == AF_INET6) {
2295  status_byte=GET_U_1(tptr);
2296  bit_length=GET_U_1(tptr + 1);
2297  if (bit_length > 128) {
2298  ND_PRINT("%sIPv6 prefix: bad bit length %u",
2299  ident,
2300  bit_length);
2301  return (0);
2302  }
2303  tptr+=2;
2304  processed+=2;
2305  } else
2306  return (0); /* somebody is fooling us */
2307 
2308  byte_length = (bit_length + 7) / 8; /* prefix has variable length encoding */
2309 
2310  memset(prefix, 0, sizeof(prefix)); /* clear the copy buffer */
2311  GET_CPY_BYTES(prefix,tptr,byte_length); /* copy as much as is stored in the TLV */
2312  tptr+=byte_length;
2313  processed+=byte_length;
2314 
2315  if (afi == AF_INET)
2316  ND_PRINT("%sIPv4 prefix: %15s/%u",
2317  ident,
2318  ipaddr_string(ndo, prefix), /* local buffer, not packet data; don't use GET_IPADDR_STRING() */
2319  bit_length);
2320  else if (afi == AF_INET6)
2321  ND_PRINT("%sIPv6 prefix: %s/%u",
2322  ident,
2323  ip6addr_string(ndo, prefix), /* local buffer, not packet data; don't use GET_IP6ADDR_STRING() */
2324  bit_length);
2325 
2326  ND_PRINT(", Distribution: %s, Metric: %u",
2327  ISIS_MASK_TLV_EXTD_IP_UPDOWN(status_byte) ? "down" : "up",
2328  metric);
2329 
2330  if (afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte))
2331  ND_PRINT(", sub-TLVs present");
2332  else if (afi == AF_INET6)
2333  ND_PRINT(", %s%s",
2334  ISIS_MASK_TLV_EXTD_IP6_IE(status_byte) ? "External" : "Internal",
2335  ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte) ? ", sub-TLVs present" : "");
2336 
2337  if ((afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte))
2338  || (afi == AF_INET6 && ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte))
2339  ) {
2340  /* assume that one prefix can hold more
2341  than one subTLV - therefore the first byte must reflect
2342  the aggregate bytecount of the subTLVs for this prefix
2343  */
2344  sublen=GET_U_1(tptr);
2345  tptr++;
2346  processed+=sublen+1;
2347  ND_PRINT(" (%u)", sublen); /* print out subTLV length */
2348 
2349  while (sublen>0) {
2350  subtlvtype=GET_U_1(tptr);
2351  subtlvlen=GET_U_1(tptr + 1);
2352  tptr+=2;
2353  /* prepend the indent string */
2354  snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident);
2355  if (!isis_print_ip_reach_subtlv(ndo, tptr, subtlvtype, subtlvlen, ident_buffer))
2356  return(0);
2357  tptr+=subtlvlen;
2358  sublen-=(subtlvlen+2);
2359  }
2360  }
2361  return (processed);
2362 }
2363 
2364 static void
2365 isis_print_router_cap_subtlv(netdissect_options *ndo, const uint8_t *tptr, uint8_t tlen)
2366 {
2367  uint8_t subt, subl;
2368 
2369  while (tlen >= 2) {
2370  subt = GET_U_1(tptr);
2371  subl = GET_U_1(tptr+1);
2372  tlen -= 2;
2373  tptr += 2;
2374 
2375  /* first lets see if we know the subTLVs name*/
2376  ND_PRINT("\n\t\t%s subTLV #%u, length: %u",
2378  subt, subl);
2379 
2380  /*
2381  * Boundary check.
2382  */
2383  if (subl > tlen) {
2384  break;
2385  }
2386  ND_TCHECK_LEN(tptr, subl);
2387 
2388  switch (subt) {
2390  {
2391  uint8_t flags, sid_tlen, sid_type, sid_len;
2392  uint32_t range;
2393  const uint8_t *sid_ptr;
2394 
2395  flags = GET_U_1(tptr);
2396  range = GET_BE_U_3(tptr+1);
2397  ND_PRINT(", Flags [%s], Range %u",
2399  range);
2400  sid_ptr = tptr + 4;
2401  sid_tlen = subl - 4;
2402 
2403  while (sid_tlen >= 5) {
2404  sid_type = GET_U_1(sid_ptr);
2405  sid_len = GET_U_1(sid_ptr+1);
2406  sid_tlen -= 2;
2407  sid_ptr += 2;
2408 
2409  /*
2410  * Boundary check.
2411  */
2412  if (sid_len > sid_tlen) {
2413  break;
2414  }
2415 
2416  switch (sid_type) {
2417  case 1:
2418  if (sid_len == 3) {
2419  ND_PRINT(", SID value %u", GET_BE_U_3(sid_ptr));
2420  } else if (sid_len == 4) {
2421  ND_PRINT(", SID value %u", GET_BE_U_4(sid_ptr));
2422  } else {
2423  ND_PRINT(", Unknown SID length%u", sid_len);
2424  }
2425  break;
2426  default:
2427  print_unknown_data(ndo, sid_ptr, "\n\t\t ", sid_len);
2428  }
2429 
2430  sid_ptr += sid_len;
2431  sid_tlen -= sid_len;
2432  }
2433  }
2434  break;
2435  default:
2436  print_unknown_data(ndo, tptr, "\n\t\t", subl);
2437  break;
2438  }
2439 
2440  tlen -= subl;
2441  tptr += subl;
2442  }
2443  trunc:
2444  return;
2445 }
2446 
2447 /*
2448  * Clear checksum and lifetime prior to signature verification.
2449  */
2450 static void
2452 {
2453  struct isis_lsp_header *header_lsp = (struct isis_lsp_header *) header;
2454 
2455  header_lsp->checksum[0] = 0;
2456  header_lsp->checksum[1] = 0;
2457  header_lsp->remaining_lifetime[0] = 0;
2458  header_lsp->remaining_lifetime[1] = 0;
2459 }
2460 
2461 /*
2462  * isis_print
2463  * Decode IS-IS packets. Return 0 on error.
2464  */
2465 
2466 #define INVALID_OR_DECREMENT(length,decr) \
2467  if ((length) < (decr)) { \
2468  ND_PRINT(" [packet length %u < %zu]", (length), (decr)); \
2469  nd_print_invalid(ndo); \
2470  return 1; \
2471  } \
2472  length -= (decr);
2473 
2474 static int
2476  const uint8_t *p, u_int length)
2477 {
2478  const struct isis_common_header *isis_header;
2479 
2480  const struct isis_iih_lan_header *header_iih_lan;
2481  const struct isis_iih_ptp_header *header_iih_ptp;
2482  const struct isis_lsp_header *header_lsp;
2483  const struct isis_csnp_header *header_csnp;
2484  const struct isis_psnp_header *header_psnp;
2485 
2486  const struct isis_tlv_lsp *tlv_lsp;
2487  const struct isis_tlv_ptp_adj *tlv_ptp_adj;
2488  const struct isis_tlv_is_reach *tlv_is_reach;
2489  const struct isis_tlv_es_reach *tlv_es_reach;
2490 
2491  uint8_t version, pdu_version, fixed_len;
2492  uint8_t pdu_type, pdu_max_area, max_area, pdu_id_length, id_length, tlv_type, tlv_len, tlen, alen, prefix_len;
2493  u_int ext_is_len, ext_ip_len;
2494  uint8_t mt_len;
2495  uint8_t isis_subtlv_idrp;
2496  const uint8_t *optr, *pptr, *tptr;
2497  u_int packet_len;
2498  u_short pdu_len, key_id;
2499  u_int i,vendor_id, num_vals;
2500  uint8_t auth_type;
2501  uint8_t num_system_ids;
2502  int sigcheck;
2503 
2504  ndo->ndo_protocol = "isis";
2505  packet_len=length;
2506  optr = p; /* initialize the _o_riginal pointer to the packet start -
2507  need it for parsing the checksum TLV and authentication
2508  TLV verification */
2509  isis_header = (const struct isis_common_header *)p;
2510  ND_TCHECK_SIZE(isis_header);
2511  if (length < ISIS_COMMON_HEADER_SIZE)
2512  goto trunc;
2513  pptr = p+(ISIS_COMMON_HEADER_SIZE);
2514  header_iih_lan = (const struct isis_iih_lan_header *)pptr;
2515  header_iih_ptp = (const struct isis_iih_ptp_header *)pptr;
2516  header_lsp = (const struct isis_lsp_header *)pptr;
2517  header_csnp = (const struct isis_csnp_header *)pptr;
2518  header_psnp = (const struct isis_psnp_header *)pptr;
2519 
2520  if (!ndo->ndo_eflag)
2521  ND_PRINT("IS-IS");
2522 
2523  /*
2524  * Sanity checking of the header.
2525  */
2526 
2527  version = GET_U_1(isis_header->version);
2528  if (version != ISIS_VERSION) {
2529  ND_PRINT("version %u packet not supported", version);
2530  return (0);
2531  }
2532 
2533  pdu_id_length = GET_U_1(isis_header->id_length);
2534  if ((pdu_id_length != SYSTEM_ID_LEN) && (pdu_id_length != 0)) {
2535  ND_PRINT("system ID length of %u is not supported",
2536  pdu_id_length);
2537  return (0);
2538  }
2539 
2540  pdu_version = GET_U_1(isis_header->pdu_version);
2541  if (pdu_version != ISIS_VERSION) {
2542  ND_PRINT("version %u packet not supported", pdu_version);
2543  return (0);
2544  }
2545 
2546  fixed_len = GET_U_1(isis_header->fixed_len);
2547  if (length < fixed_len) {
2548  ND_PRINT("fixed header length %u > packet length %u", fixed_len, length);
2549  return (0);
2550  }
2551 
2552  if (fixed_len < ISIS_COMMON_HEADER_SIZE) {
2553  ND_PRINT("fixed header length %u < minimum header size %u", fixed_len, (u_int)ISIS_COMMON_HEADER_SIZE);
2554  return (0);
2555  }
2556 
2557  pdu_max_area = GET_U_1(isis_header->max_area);
2558  switch(pdu_max_area) {
2559  case 0:
2560  max_area = 3; /* silly shit */
2561  break;
2562  case 255:
2563  ND_PRINT("bad packet -- 255 areas");
2564  return (0);
2565  default:
2566  max_area = pdu_max_area;
2567  break;
2568  }
2569 
2570  switch(pdu_id_length) {
2571  case 0:
2572  id_length = 6; /* silly shit again */
2573  break;
2574  case 1: /* 1-8 are valid sys-ID lengths */
2575  case 2:
2576  case 3:
2577  case 4:
2578  case 5:
2579  case 6:
2580  case 7:
2581  case 8:
2582  id_length = pdu_id_length;
2583  break;
2584  case 255:
2585  id_length = 0; /* entirely useless */
2586  break;
2587  default:
2588  id_length = pdu_id_length;
2589  break;
2590  }
2591 
2592  /* toss any non 6-byte sys-ID len PDUs */
2593  if (id_length != 6 ) {
2594  ND_PRINT("bad packet -- illegal sys-ID length (%u)", id_length);
2595  return (0);
2596  }
2597 
2598  pdu_type = GET_U_1(isis_header->pdu_type);
2599 
2600  /* in non-verbose mode print the basic PDU Type plus PDU specific brief information*/
2601  if (ndo->ndo_vflag == 0) {
2602  ND_PRINT("%s%s",
2603  ndo->ndo_eflag ? "" : ", ",
2604  tok2str(isis_pdu_values, "unknown PDU-Type %u", pdu_type));
2605  } else {
2606  /* ok they seem to want to know everything - lets fully decode it */
2607  ND_PRINT("%slength %u", ndo->ndo_eflag ? "" : ", ", length);
2608 
2609  ND_PRINT("\n\t%s, hlen: %u, v: %u, pdu-v: %u, sys-id-len: %u (%u), max-area: %u (%u)",
2611  "unknown, type %u",
2612  pdu_type),
2613  fixed_len,
2614  version,
2615  pdu_version,
2616  id_length,
2617  pdu_id_length,
2618  max_area,
2619  pdu_max_area);
2620 
2621  if (ndo->ndo_vflag > 1) {
2622  if (!print_unknown_data(ndo, optr, "\n\t", 8)) /* provide the _o_riginal pointer */
2623  return (0); /* for optionally debugging the common header */
2624  }
2625  }
2626 
2627  switch (pdu_type) {
2628 
2629  case ISIS_PDU_L1_LAN_IIH:
2630  case ISIS_PDU_L2_LAN_IIH:
2632  ND_PRINT(", bogus fixed header length %u should be %zu",
2634  return (0);
2635  }
2636  ND_TCHECK_SIZE(header_iih_lan);
2638  goto trunc;
2639  if (ndo->ndo_vflag == 0) {
2640  ND_PRINT(", src-id %s",
2641  isis_print_id(ndo, header_iih_lan->source_id, SYSTEM_ID_LEN));
2642  ND_PRINT(", lan-id %s, prio %u",
2643  isis_print_id(ndo, header_iih_lan->lan_id,NODE_ID_LEN),
2644  GET_U_1(header_iih_lan->priority));
2645  ND_PRINT(", length %u", length);
2646  return (1);
2647  }
2648  pdu_len=GET_BE_U_2(header_iih_lan->pdu_len);
2649  if (packet_len>pdu_len) {
2650  packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2651  length=pdu_len;
2652  }
2653 
2654  ND_PRINT("\n\t source-id: %s, holding time: %us, Flags: [%s]",
2655  isis_print_id(ndo, header_iih_lan->source_id,SYSTEM_ID_LEN),
2656  GET_BE_U_2(header_iih_lan->holding_time),
2658  "unknown circuit type 0x%02x",
2659  GET_U_1(header_iih_lan->circuit_type)));
2660 
2661  ND_PRINT("\n\t lan-id: %s, Priority: %u, PDU length: %u",
2662  isis_print_id(ndo, header_iih_lan->lan_id, NODE_ID_LEN),
2663  GET_U_1(header_iih_lan->priority) & ISIS_LAN_PRIORITY_MASK,
2664  pdu_len);
2665 
2666  if (ndo->ndo_vflag > 1) {
2667  if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_IIH_LAN_HEADER_SIZE))
2668  return (0);
2669  }
2670 
2673  break;
2674 
2675  case ISIS_PDU_PTP_IIH:
2677  ND_PRINT(", bogus fixed header length %u should be %zu",
2679  return (0);
2680  }
2681  ND_TCHECK_SIZE(header_iih_ptp);
2683  goto trunc;
2684  if (ndo->ndo_vflag == 0) {
2685  ND_PRINT(", src-id %s", isis_print_id(ndo, header_iih_ptp->source_id, SYSTEM_ID_LEN));
2686  ND_PRINT(", length %u", length);
2687  return (1);
2688  }
2689  pdu_len=GET_BE_U_2(header_iih_ptp->pdu_len);
2690  if (packet_len>pdu_len) {
2691  packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2692  length=pdu_len;
2693  }
2694 
2695  ND_PRINT("\n\t source-id: %s, holding time: %us, Flags: [%s]",
2696  isis_print_id(ndo, header_iih_ptp->source_id,SYSTEM_ID_LEN),
2697  GET_BE_U_2(header_iih_ptp->holding_time),
2699  "unknown circuit type 0x%02x",
2700  GET_U_1(header_iih_ptp->circuit_type)));
2701 
2702  ND_PRINT("\n\t circuit-id: 0x%02x, PDU length: %u",
2703  GET_U_1(header_iih_ptp->circuit_id),
2704  pdu_len);
2705 
2706  if (ndo->ndo_vflag > 1) {
2707  if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_IIH_PTP_HEADER_SIZE))
2708  return (0);
2709  }
2712  break;
2713 
2714  case ISIS_PDU_L1_LSP:
2715  case ISIS_PDU_L2_LSP:
2716  if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) {
2717  ND_PRINT(", bogus fixed header length %u should be %zu",
2718  fixed_len, ISIS_LSP_HEADER_SIZE);
2719  return (0);
2720  }
2721  ND_TCHECK_SIZE(header_lsp);
2723  goto trunc;
2724  if (ndo->ndo_vflag == 0) {
2725  ND_PRINT(", lsp-id %s, seq 0x%08x, lifetime %5us",
2726  isis_print_id(ndo, header_lsp->lsp_id, LSP_ID_LEN),
2727  GET_BE_U_4(header_lsp->sequence_number),
2728  GET_BE_U_2(header_lsp->remaining_lifetime));
2729  ND_PRINT(", length %u", length);
2730  return (1);
2731  }
2732  pdu_len=GET_BE_U_2(header_lsp->pdu_len);
2733  if (packet_len>pdu_len) {
2734  packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2735  length=pdu_len;
2736  }
2737 
2738  ND_PRINT("\n\t lsp-id: %s, seq: 0x%08x, lifetime: %5us\n\t chksum: 0x%04x",
2739  isis_print_id(ndo, header_lsp->lsp_id, LSP_ID_LEN),
2740  GET_BE_U_4(header_lsp->sequence_number),
2741  GET_BE_U_2(header_lsp->remaining_lifetime),
2742  GET_BE_U_2(header_lsp->checksum));
2743 
2744  osi_print_cksum(ndo, (const uint8_t *)header_lsp->lsp_id,
2745  GET_BE_U_2(header_lsp->checksum),
2746  12, length-12);
2747 
2748  ND_PRINT(", PDU length: %u, Flags: [ %s",
2749  pdu_len,
2750  ISIS_MASK_LSP_OL_BIT(header_lsp->typeblock) ? "Overload bit set, " : "");
2751 
2752  if (ISIS_MASK_LSP_ATT_BITS(header_lsp->typeblock)) {
2753  ND_PRINT("%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : "");
2754  ND_PRINT("%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : "");
2755  ND_PRINT("%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : "");
2756  ND_PRINT("%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : "");
2757  ND_PRINT("ATT bit set, ");
2758  }
2759  ND_PRINT("%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : "");
2760  ND_PRINT("%s ]", tok2str(isis_lsp_istype_values, "Unknown(0x%x)",
2761  ISIS_MASK_LSP_ISTYPE_BITS(header_lsp->typeblock)));
2762 
2763  if (ndo->ndo_vflag > 1) {
2764  if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_LSP_HEADER_SIZE))
2765  return (0);
2766  }
2767 
2770  break;
2771 
2772  case ISIS_PDU_L1_CSNP:
2773  case ISIS_PDU_L2_CSNP:
2774  if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) {
2775  ND_PRINT(", bogus fixed header length %u should be %zu",
2777  return (0);
2778  }
2779  ND_TCHECK_SIZE(header_csnp);
2781  goto trunc;
2782  if (ndo->ndo_vflag == 0) {
2783  ND_PRINT(", src-id %s", isis_print_id(ndo, header_csnp->source_id, NODE_ID_LEN));
2784  ND_PRINT(", length %u", length);
2785  return (1);
2786  }
2787  pdu_len=GET_BE_U_2(header_csnp->pdu_len);
2788  if (packet_len>pdu_len) {
2789  packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2790  length=pdu_len;
2791  }
2792 
2793  ND_PRINT("\n\t source-id: %s, PDU length: %u",
2794  isis_print_id(ndo, header_csnp->source_id, NODE_ID_LEN),
2795  pdu_len);
2796  ND_PRINT("\n\t start lsp-id: %s",
2797  isis_print_id(ndo, header_csnp->start_lsp_id, LSP_ID_LEN));
2798  ND_PRINT("\n\t end lsp-id: %s",
2799  isis_print_id(ndo, header_csnp->end_lsp_id, LSP_ID_LEN));
2800 
2801  if (ndo->ndo_vflag > 1) {
2802  if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_CSNP_HEADER_SIZE))
2803  return (0);
2804  }
2805 
2808  break;
2809 
2810  case ISIS_PDU_L1_PSNP:
2811  case ISIS_PDU_L2_PSNP:
2812  if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) {
2813  ND_PRINT("- bogus fixed header length %u should be %zu",
2815  return (0);
2816  }
2817  ND_TCHECK_SIZE(header_psnp);
2819  goto trunc;
2820  if (ndo->ndo_vflag == 0) {
2821  ND_PRINT(", src-id %s", isis_print_id(ndo, header_psnp->source_id, NODE_ID_LEN));
2822  ND_PRINT(", length %u", length);
2823  return (1);
2824  }
2825  pdu_len=GET_BE_U_2(header_psnp->pdu_len);
2826  if (packet_len>pdu_len) {
2827  packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2828  length=pdu_len;
2829  }
2830 
2831  ND_PRINT("\n\t source-id: %s, PDU length: %u",
2832  isis_print_id(ndo, header_psnp->source_id, NODE_ID_LEN),
2833  pdu_len);
2834 
2835  if (ndo->ndo_vflag > 1) {
2836  if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_PSNP_HEADER_SIZE))
2837  return (0);
2838  }
2839 
2842  break;
2843 
2844  default:
2845  if (ndo->ndo_vflag == 0) {
2846  ND_PRINT(", length %u", length);
2847  return (1);
2848  }
2849  (void)print_unknown_data(ndo, pptr, "\n\t ", length);
2850  return (0);
2851  }
2852 
2853  /*
2854  * Now print the TLV's.
2855  */
2856 
2857  while (packet_len > 0) {
2858  ND_TCHECK_2(pptr);
2859  if (packet_len < 2)
2860  goto trunc;
2861  tlv_type = GET_U_1(pptr);
2862  tlv_len = GET_U_1(pptr + 1);
2863  pptr += 2;
2864  packet_len -= 2;
2865  tlen = tlv_len; /* copy temporary len & pointer to packet data */
2866  tptr = pptr;
2867 
2868  /* first lets see if we know the TLVs name*/
2869  ND_PRINT("\n\t %s TLV #%u, length: %u",
2871  "unknown",
2872  tlv_type),
2873  tlv_type,
2874  tlv_len);
2875 
2876  if (packet_len < tlv_len)
2877  goto trunc;
2878 
2879  /* now check if we have a decoder otherwise do a hexdump at the end*/
2880  switch (tlv_type) {
2881  case ISIS_TLV_AREA_ADDR:
2882  while (tlen != 0) {
2883  alen = GET_U_1(tptr);
2884  tptr++;
2885  tlen--;
2886  if (tlen < alen)
2887  goto tlv_trunc;
2888  ND_PRINT("\n\t Area address (length: %u): %s",
2889  alen,
2890  GET_ISONSAP_STRING(tptr, alen));
2891  tptr += alen;
2892  tlen -= alen;
2893  }
2894  break;
2895  case ISIS_TLV_ISNEIGH:
2896  while (tlen != 0) {
2897  if (tlen < MAC_ADDR_LEN)
2898  goto tlv_trunc;
2899  ND_TCHECK_LEN(tptr, MAC_ADDR_LEN);
2900  ND_PRINT("\n\t SNPA: %s", isis_print_id(ndo, tptr, MAC_ADDR_LEN));
2901  tlen -= MAC_ADDR_LEN;
2902  tptr += MAC_ADDR_LEN;
2903  }
2904  break;
2905 
2906  case ISIS_TLV_INSTANCE_ID:
2907  if (tlen < 4)
2908  goto tlv_trunc;
2909  num_vals = (tlen-2)/2;
2910  ND_PRINT("\n\t Instance ID: %u, ITIDs(%u)%s ",
2911  GET_BE_U_2(tptr), num_vals,
2912  num_vals ? ":" : "");
2913  tptr += 2;
2914  tlen -= 2;
2915  for (i=0; i < num_vals; i++) {
2916  ND_PRINT("%u", GET_BE_U_2(tptr));
2917  if (i < (num_vals - 1)) {
2918  ND_PRINT(", ");
2919  }
2920  tptr += 2;
2921  tlen -= 2;
2922  }
2923  break;
2924 
2925  case ISIS_TLV_PADDING:
2926  break;
2927 
2928  case ISIS_TLV_MT_IS_REACH:
2929  mt_len = isis_print_mtid(ndo, tptr, "\n\t ", tlen);
2930  if (mt_len == 0) /* did something go wrong ? */
2931  goto trunc;
2932  tptr+=mt_len;
2933  tlen-=mt_len;
2934  while (tlen != 0) {
2935  ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type, tlen);
2936  if (ext_is_len == 0) /* did something go wrong ? */
2937  goto trunc;
2938  if (tlen < ext_is_len) {
2939  ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_is_len);
2940  nd_print_invalid(ndo);
2941  break;
2942  }
2943  tlen-=(uint8_t)ext_is_len;
2944  tptr+=(uint8_t)ext_is_len;
2945  }
2946  break;
2947 
2948  case ISIS_TLV_IS_ALIAS_ID:
2949  while (tlen != 0) {
2950  ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type, tlen);
2951  if (ext_is_len == 0) /* did something go wrong ? */
2952  goto trunc;
2953  if (tlen < ext_is_len) {
2954  ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_is_len);
2955  nd_print_invalid(ndo);
2956  break;
2957  }
2958  tlen-=(uint8_t)ext_is_len;
2959  tptr+=(uint8_t)ext_is_len;
2960  }
2961  break;
2962 
2963  case ISIS_TLV_EXT_IS_REACH:
2964  while (tlen != 0) {
2965  ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type, tlen);
2966  if (ext_is_len == 0) /* did something go wrong ? */
2967  goto trunc;
2968  if (tlen < ext_is_len) {
2969  ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_is_len);
2970  nd_print_invalid(ndo);
2971  break;
2972  }
2973  tlen-=(uint8_t)ext_is_len;
2974  tptr+=(uint8_t)ext_is_len;
2975  }
2976  break;
2977  case ISIS_TLV_IS_REACH:
2978  if (tlen < 1)
2979  goto tlv_trunc;
2980  ND_PRINT("\n\t %s",
2982  "bogus virtual flag 0x%02x",
2983  GET_U_1(tptr)));
2984  tptr++;
2985  tlen--;
2986  tlv_is_reach = (const struct isis_tlv_is_reach *)tptr;
2987  while (tlen != 0) {
2988  if (tlen < sizeof(struct isis_tlv_is_reach))
2989  goto tlv_trunc;
2990  ND_TCHECK_SIZE(tlv_is_reach);
2991  ND_PRINT("\n\t IS Neighbor: %s",
2992  isis_print_id(ndo, tlv_is_reach->neighbor_nodeid, NODE_ID_LEN));
2993  isis_print_metric_block(ndo, &tlv_is_reach->isis_metric_block);
2994  tlen -= sizeof(struct isis_tlv_is_reach);
2995  tlv_is_reach++;
2996  }
2997  break;
2998 
2999  case ISIS_TLV_ESNEIGH:
3000  tlv_es_reach = (const struct isis_tlv_es_reach *)tptr;
3001  while (tlen != 0) {
3002  if (tlen < sizeof(struct isis_tlv_es_reach))
3003  goto tlv_trunc;
3004  ND_TCHECK_SIZE(tlv_es_reach);
3005  ND_PRINT("\n\t ES Neighbor: %s",
3006  isis_print_id(ndo, tlv_es_reach->neighbor_sysid, SYSTEM_ID_LEN));
3007  isis_print_metric_block(ndo, &tlv_es_reach->isis_metric_block);
3008  tlen -= sizeof(struct isis_tlv_es_reach);
3009  tlv_es_reach++;
3010  }
3011  break;
3012 
3013  /* those two TLVs share the same format */
3014  case ISIS_TLV_INT_IP_REACH:
3015  case ISIS_TLV_EXT_IP_REACH:
3016  if (!isis_print_tlv_ip_reach(ndo, pptr, "\n\t ", tlv_len))
3017  return (1);
3018  break;
3019 
3021  while (tlen != 0) {
3022  ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET);
3023  if (ext_ip_len == 0) /* did something go wrong ? */
3024  goto trunc;
3025  if (tlen < ext_ip_len) {
3026  ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_ip_len);
3027  nd_print_invalid(ndo);
3028  break;
3029  }
3030  tlen-=(uint8_t)ext_ip_len;
3031  tptr+=(uint8_t)ext_ip_len;
3032  }
3033  break;
3034 
3035  case ISIS_TLV_MT_IP_REACH:
3036  mt_len = isis_print_mtid(ndo, tptr, "\n\t ", tlen);
3037  if (mt_len == 0) { /* did something go wrong ? */
3038  goto trunc;
3039  }
3040  tptr+=mt_len;
3041  tlen-=mt_len;
3042 
3043  while (tlen != 0) {
3044  ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET);
3045  if (ext_ip_len == 0) /* did something go wrong ? */
3046  goto trunc;
3047  if (tlen < ext_ip_len) {
3048  ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_ip_len);
3049  nd_print_invalid(ndo);
3050  break;
3051  }
3052  tlen-=(uint8_t)ext_ip_len;
3053  tptr+=(uint8_t)ext_ip_len;
3054  }
3055  break;
3056 
3057  case ISIS_TLV_IP6_REACH:
3058  while (tlen != 0) {
3059  ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET6);
3060  if (ext_ip_len == 0) /* did something go wrong ? */
3061  goto trunc;
3062  if (tlen < ext_ip_len) {
3063  ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_ip_len);
3064  nd_print_invalid(ndo);
3065  break;
3066  }
3067  tlen-=(uint8_t)ext_ip_len;
3068  tptr+=(uint8_t)ext_ip_len;
3069  }
3070  break;
3071 
3072  case ISIS_TLV_MT_IP6_REACH:
3073  mt_len = isis_print_mtid(ndo, tptr, "\n\t ", tlen);
3074  if (mt_len == 0) { /* did something go wrong ? */
3075  goto trunc;
3076  }
3077  tptr+=mt_len;
3078  tlen-=mt_len;
3079 
3080  while (tlen != 0) {
3081  ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET6);
3082  if (ext_ip_len == 0) /* did something go wrong ? */
3083  goto trunc;
3084  if (tlen < ext_ip_len) {
3085  ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_ip_len);
3086  nd_print_invalid(ndo);
3087  break;
3088  }
3089  tlen-=(uint8_t)ext_ip_len;
3090  tptr+=(uint8_t)ext_ip_len;
3091  }
3092  break;
3093 
3094  case ISIS_TLV_IP6ADDR:
3095  while (tlen != 0) {
3096  if (tlen < sizeof(nd_ipv6))
3097  goto tlv_trunc;
3098  ND_PRINT("\n\t IPv6 interface address: %s",
3099  GET_IP6ADDR_STRING(tptr));
3100 
3101  tptr += sizeof(nd_ipv6);
3102  tlen -= sizeof(nd_ipv6);
3103  }
3104  break;
3105  case ISIS_TLV_AUTH:
3106  if (tlen < 1)
3107  goto tlv_trunc;
3108  auth_type = GET_U_1(tptr);
3109  tptr++;
3110  tlen--;
3111 
3112  ND_PRINT("\n\t %s: ",
3114  "unknown Authentication type 0x%02x",
3115  auth_type));
3116 
3117  switch (auth_type) {
3119  nd_printjnp(ndo, tptr, tlen);
3120  break;
3121  case ISIS_SUBTLV_AUTH_MD5:
3122  for(i=0;i<tlen;i++) {
3123  ND_PRINT("%02x", GET_U_1(tptr + i));
3124  }
3125  if (tlen != ISIS_SUBTLV_AUTH_MD5_LEN)
3126  ND_PRINT(", (invalid subTLV) ");
3127 
3128  sigcheck = signature_verify(ndo, optr, length, tptr,
3130  header_lsp);
3131  ND_PRINT(" (%s)", tok2str(signature_check_values, "Unknown", sigcheck));
3132 
3133  break;
3135  if (tlen < 2)
3136  goto tlv_trunc;
3137  key_id = GET_BE_U_2(tptr);
3138  ND_PRINT("%u, password: ", key_id);
3139  tptr += 2;
3140  tlen -= 2;
3141  for(i=0;i<tlen;i++) {
3142  ND_PRINT("%02x", GET_U_1(tptr + i));
3143  }
3144  break;
3146  default:
3147  if (!print_unknown_data(ndo, tptr, "\n\t\t ", tlen))
3148  return(0);
3149  break;
3150  }
3151  break;
3152 
3153  case ISIS_TLV_PTP_ADJ:
3154  tlv_ptp_adj = (const struct isis_tlv_ptp_adj *)tptr;
3155  if(tlen>=1) {
3156  ND_PRINT("\n\t Adjacency State: %s (%u)",
3157  tok2str(isis_ptp_adjancey_values, "unknown", GET_U_1(tptr)),
3158  GET_U_1(tptr));
3159  tlen--;
3160  }
3161  if(tlen>sizeof(tlv_ptp_adj->extd_local_circuit_id)) {
3162  ND_PRINT("\n\t Extended Local circuit-ID: 0x%08x",
3163  GET_BE_U_4(tlv_ptp_adj->extd_local_circuit_id));
3164  tlen-=sizeof(tlv_ptp_adj->extd_local_circuit_id);
3165  }
3166  if(tlen>=SYSTEM_ID_LEN) {
3168  ND_PRINT("\n\t Neighbor System-ID: %s",
3169  isis_print_id(ndo, tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN));
3170  tlen-=SYSTEM_ID_LEN;
3171  }
3172  if(tlen>=sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)) {
3173  ND_PRINT("\n\t Neighbor Extended Local circuit-ID: 0x%08x",
3175  }
3176  break;
3177 
3178  case ISIS_TLV_PROTOCOLS:
3179  ND_PRINT("\n\t NLPID(s): ");
3180  while (tlen != 0) {
3181  ND_PRINT("%s (0x%02x)",
3183  "unknown",
3184  GET_U_1(tptr)),
3185  GET_U_1(tptr));
3186  if (tlen>1) /* further NPLIDs ? - put comma */
3187  ND_PRINT(", ");
3188  tptr++;
3189  tlen--;
3190  }
3191  break;
3192 
3193  case ISIS_TLV_MT_PORT_CAP:
3194  {
3195  if (tlen < 2)
3196  goto tlv_trunc;
3197 
3198  ND_PRINT("\n\t RES: %u, MTID(s): %u",
3199  (GET_BE_U_2(tptr) >> 12),
3200  (GET_BE_U_2(tptr) & 0x0fff));
3201 
3202  tptr += 2;
3203  tlen -= 2;
3204 
3205  if (tlen)
3206  isis_print_mt_port_cap_subtlv(ndo, tptr, tlen);
3207 
3208  break;
3209  }
3210 
3212  if (tlen < 2)
3213  goto tlv_trunc;
3214 
3215  ND_PRINT("\n\t O: %u, RES: %u, MTID(s): %u",
3216  (GET_BE_U_2(tptr) >> 15) & 0x01,
3217  (GET_BE_U_2(tptr) >> 12) & 0x07,
3218  GET_BE_U_2(tptr) & 0x0fff);
3219 
3220  tptr += 2;
3221  tlen -= 2;
3222 
3223  if (tlen)
3224  isis_print_mt_capability_subtlv(ndo, tptr, tlen);
3225 
3226  break;
3227 
3228  case ISIS_TLV_TE_ROUTER_ID:
3229  if (tlen < sizeof(nd_ipv4))
3230  goto tlv_trunc;
3231  ND_PRINT("\n\t Traffic Engineering Router ID: %s", GET_IPADDR_STRING(pptr));
3232  break;
3233 
3234  case ISIS_TLV_IPADDR:
3235  while (tlen != 0) {
3236  if (tlen < sizeof(nd_ipv4))
3237  goto tlv_trunc;
3238  ND_PRINT("\n\t IPv4 interface address: %s", GET_IPADDR_STRING(tptr));
3239  tptr += sizeof(nd_ipv4);
3240  tlen -= sizeof(nd_ipv4);
3241  }
3242  break;
3243 
3244  case ISIS_TLV_HOSTNAME:
3245  ND_PRINT("\n\t Hostname: ");
3246  nd_printjnp(ndo, tptr, tlen);
3247  break;
3248 
3250  if (tlen < NODE_ID_LEN)
3251  break;
3252  ND_TCHECK_LEN(tptr, NODE_ID_LEN);
3253  ND_PRINT("\n\t IS Neighbor: %s", isis_print_id(ndo, tptr, NODE_ID_LEN));
3254  tptr+=NODE_ID_LEN;
3255  tlen-=NODE_ID_LEN;
3256 
3257  if (tlen < 1)
3258  break;
3259  ND_PRINT(", Flags: [%s]",
3260  ISIS_MASK_TLV_SHARED_RISK_GROUP(GET_U_1(tptr)) ? "numbered" : "unnumbered");
3261  tptr++;
3262  tlen--;
3263 
3264  if (tlen < sizeof(nd_ipv4))
3265  break;
3266  ND_PRINT("\n\t IPv4 interface address: %s", GET_IPADDR_STRING(tptr));
3267  tptr+=sizeof(nd_ipv4);
3268  tlen-=sizeof(nd_ipv4);
3269 
3270  if (tlen < sizeof(nd_ipv4))
3271  break;
3272  ND_PRINT("\n\t IPv4 neighbor address: %s", GET_IPADDR_STRING(tptr));
3273  tptr+=sizeof(nd_ipv4);
3274  tlen-=sizeof(nd_ipv4);
3275 
3276  while (tlen != 0) {
3277  if (tlen < 4)
3278  goto tlv_trunc;
3279  ND_PRINT("\n\t Link-ID: 0x%08x", GET_BE_U_4(tptr));
3280  tptr+=4;
3281  tlen-=4;
3282  }
3283  break;
3284 
3285  case ISIS_TLV_LSP:
3286  tlv_lsp = (const struct isis_tlv_lsp *)tptr;
3287  while (tlen != 0) {
3288  if (tlen < sizeof(struct isis_tlv_lsp))
3289  goto tlv_trunc;
3290  ND_TCHECK_1(tlv_lsp->lsp_id + LSP_ID_LEN - 1);
3291  ND_PRINT("\n\t lsp-id: %s",
3292  isis_print_id(ndo, tlv_lsp->lsp_id, LSP_ID_LEN));
3293  ND_PRINT(", seq: 0x%08x",
3294  GET_BE_U_4(tlv_lsp->sequence_number));
3295  ND_PRINT(", lifetime: %5ds",
3296  GET_BE_U_2(tlv_lsp->remaining_lifetime));
3297  ND_PRINT(", chksum: 0x%04x", GET_BE_U_2(tlv_lsp->checksum));
3298  tlen-=sizeof(struct isis_tlv_lsp);
3299  tlv_lsp++;
3300  }
3301  break;
3302 
3303  case ISIS_TLV_CHECKSUM:
3304  if (tlen < ISIS_TLV_CHECKSUM_MINLEN)
3305  break;
3307  ND_PRINT("\n\t checksum: 0x%04x ", GET_BE_U_2(tptr));
3308  /* do not attempt to verify the checksum if it is zero
3309  * most likely a HMAC-MD5 TLV is also present and
3310  * to avoid conflicts the checksum TLV is zeroed.
3311  * see rfc3358 for details
3312  */
3313  osi_print_cksum(ndo, optr, GET_BE_U_2(tptr), (int)(tptr-optr),
3314  length);
3315  break;
3316 
3317  case ISIS_TLV_POI:
3318  if (tlen < 1)
3319  goto tlv_trunc;
3320  num_system_ids = GET_U_1(tptr);
3321  tptr++;
3322  tlen--;
3323  if (num_system_ids == 0) {
3324  /* Not valid */
3325  ND_PRINT(" No system IDs supplied");
3326  } else {
3327  if (tlen < SYSTEM_ID_LEN)
3328  goto tlv_trunc;
3330  ND_PRINT("\n\t Purge Originator System-ID: %s",
3331  isis_print_id(ndo, tptr, SYSTEM_ID_LEN));
3332  tptr += SYSTEM_ID_LEN;
3333  tlen -= SYSTEM_ID_LEN;
3334 
3335  if (num_system_ids > 1) {
3336  if (tlen < SYSTEM_ID_LEN)
3337  goto tlv_trunc;
3339  ND_TCHECK_LEN(tptr, 2 * SYSTEM_ID_LEN + 1);
3340  ND_PRINT("\n\t Received from System-ID: %s",
3341  isis_print_id(ndo, tptr, SYSTEM_ID_LEN));
3342  }
3343  }
3344  break;
3345 
3346  case ISIS_TLV_MT_SUPPORTED:
3347  while (tlen != 0) {
3348  /* length can only be a multiple of 2, otherwise there is
3349  something broken -> so decode down until length is 1 */
3350  if (tlen!=1) {
3351  mt_len = isis_print_mtid(ndo, tptr, "\n\t ", tlen);
3352  if (mt_len == 0) /* did something go wrong ? */
3353  goto trunc;
3354  tptr+=mt_len;
3355  tlen-=mt_len;
3356  } else {
3357  ND_PRINT("\n\t invalid MT-ID");
3358  break;
3359  }
3360  }
3361  break;
3362 
3364  /* first attempt to decode the flags */
3366  break;
3368  ND_PRINT("\n\t Flags [%s]",
3369  bittok2str(isis_restart_flag_values, "none", GET_U_1(tptr)));
3372 
3373  /* is there anything other than the flags field? */
3374  if (tlen == 0)
3375  break;
3376 
3378  break;
3380 
3381  ND_PRINT(", Remaining holding time %us", GET_BE_U_2(tptr));
3384 
3385  /* is there an additional sysid field present ?*/
3386  if (tlen == SYSTEM_ID_LEN) {
3388  ND_PRINT(", for %s", isis_print_id(ndo, tptr,SYSTEM_ID_LEN));
3389  }
3390  break;
3391 
3392  case ISIS_TLV_IDRP_INFO:
3393  if (tlen < 1)
3394  break;
3395  isis_subtlv_idrp = GET_U_1(tptr);
3396  ND_PRINT("\n\t Inter-Domain Information Type: %s",
3398  "Unknown (0x%02x)",
3399  isis_subtlv_idrp));
3400  tptr++;
3401  tlen--;
3402  switch (isis_subtlv_idrp) {
3403  case ISIS_SUBTLV_IDRP_ASN:
3404  if (tlen < 2)
3405  goto tlv_trunc;
3406  ND_PRINT("AS Number: %u", GET_BE_U_2(tptr));
3407  break;
3409  case ISIS_SUBTLV_IDRP_RES:
3410  default:
3411  if (!print_unknown_data(ndo, tptr, "\n\t ", tlen))
3412  return(0);
3413  break;
3414  }
3415  break;
3416 
3418  if (tlen < 2)
3419  break;
3420  ND_PRINT("\n\t LSP Buffersize: %u", GET_BE_U_2(tptr));
3421  break;
3422 
3423  case ISIS_TLV_PART_DIS:
3424  while (tlen != 0) {
3425  if (tlen < SYSTEM_ID_LEN)
3426  goto tlv_trunc;
3428  ND_PRINT("\n\t %s", isis_print_id(ndo, tptr, SYSTEM_ID_LEN));
3429  tptr+=SYSTEM_ID_LEN;
3430  tlen-=SYSTEM_ID_LEN;
3431  }
3432  break;
3433 
3434  case ISIS_TLV_PREFIX_NEIGH:
3435  if (tlen < sizeof(struct isis_metric_block))
3436  break;
3437  ND_TCHECK_LEN(tptr, sizeof(struct isis_metric_block));
3438  ND_PRINT("\n\t Metric Block");
3439  isis_print_metric_block(ndo, (const struct isis_metric_block *)tptr);
3440  tptr+=sizeof(struct isis_metric_block);
3441  tlen-=sizeof(struct isis_metric_block);
3442 
3443  while (tlen != 0) {
3444  prefix_len=GET_U_1(tptr); /* read out prefix length in semioctets*/
3445  tptr++;
3446  tlen--;
3447  if (prefix_len < 2) {
3448  ND_PRINT("\n\t\tAddress: prefix length %u < 2", prefix_len);
3449  break;
3450  }
3451  if (tlen < prefix_len/2)
3452  break;
3453  ND_PRINT("\n\t\tAddress: %s/%u",
3454  GET_ISONSAP_STRING(tptr, prefix_len / 2), prefix_len * 4);
3455  tptr+=prefix_len/2;
3456  tlen-=prefix_len/2;
3457  }
3458  break;
3459 
3460  case ISIS_TLV_IIH_SEQNR:
3461  if (tlen < 4)
3462  break;
3463  ND_PRINT("\n\t Sequence number: %u", GET_BE_U_4(tptr));
3464  break;
3465 
3467  if (tlen < 5) {
3468  ND_PRINT(" [object length %u < 5]", tlen);
3469  nd_print_invalid(ndo);
3470  break;
3471  }
3472  ND_PRINT("\n\t Router-ID %s", GET_IPADDR_STRING(tptr));
3473  ND_PRINT(", Flags [%s]",
3475 
3476  /* Optional set of sub-TLV */
3477  if (tlen > 5) {
3478  isis_print_router_cap_subtlv(ndo, tptr+5, tlen-5);
3479  }
3480  break;
3481 
3483  if (tlen < 3)
3484  break;
3485  vendor_id = GET_BE_U_3(tptr);
3486  ND_PRINT("\n\t Vendor: %s (%u)",
3487  tok2str(oui_values, "Unknown", vendor_id),
3488  vendor_id);
3489  tptr+=3;
3490  tlen-=3;
3491  if (tlen != 0) /* hexdump the rest */
3492  if (!print_unknown_data(ndo, tptr, "\n\t\t", tlen))
3493  return(0);
3494  break;
3495  /*
3496  * FIXME those are the defined TLVs that lack a decoder
3497  * you are welcome to contribute code ;-)
3498  */
3499 
3502  case ISIS_TLV_IPAUTH:
3505 
3506  default:
3507  if (ndo->ndo_vflag <= 1) {
3508  if (!print_unknown_data(ndo, pptr, "\n\t\t", tlv_len))
3509  return(0);
3510  }
3511  break;
3512  }
3513 tlv_trunc:
3514  /* do we want to see an additionally hexdump ? */
3515  if (ndo->ndo_vflag> 1) {
3516  if (!print_unknown_data(ndo, pptr, "\n\t ", tlv_len))
3517  return(0);
3518  }
3519 
3520  pptr += tlv_len;
3521  packet_len -= tlv_len;
3522  }
3523 
3524  if (packet_len != 0) {
3525  ND_PRINT("\n\t %u straggler bytes", packet_len);
3526  }
3527  return (1);
3528 
3529 trunc:
3530  nd_print_trunc(ndo);
3531  return (1);
3532 }
3533 
3534 static void
3535 osi_print_cksum(netdissect_options *ndo, const uint8_t *pptr,
3536  uint16_t checksum, int checksum_offset, u_int length)
3537 {
3538  uint16_t calculated_checksum;
3539 
3540  /* do not attempt to verify the checksum if it is zero,
3541  * if the offset is nonsense,
3542  * or the base pointer is not sane
3543  */
3544  if (!checksum
3545  || checksum_offset < 0
3546  || !ND_TTEST_2(pptr + checksum_offset)
3547  || (u_int)checksum_offset > length
3548  || !ND_TTEST_LEN(pptr, length)) {
3549  ND_PRINT(" (unverified)");
3550  } else {
3551 #if 0
3552  ND_PRINT("\nosi_print_cksum: %p %d %u\n", pptr, checksum_offset, length);
3553 #endif
3554  calculated_checksum = create_osi_cksum(pptr, checksum_offset, length);
3555  if (checksum == calculated_checksum) {
3556  ND_PRINT(" (correct)");
3557  } else {
3558  ND_PRINT(" (incorrect should be 0x%04x)", calculated_checksum);
3559  }
3560  }
3561 }
const char * ipaddr_string(netdissect_options *ndo, const u_char *ap)
Definition: addrtoname.c:279
const char * ip6addr_string(netdissect_options *ndo, const u_char *ap)
Definition: addrtoname.c:338
@ LINKADDR_OTHER
Definition: addrtoname.h:39
#define GET_IPADDR_STRING(p)
Definition: addrtoname.h:120
#define GET_LINKADDR_STRING(p, type, len)
Definition: addrtoname.h:116
#define GET_IP6ADDR_STRING(p)
Definition: addrtoname.h:121
#define GET_ETHERADDR_STRING(p)
Definition: addrtoname.h:117
#define GET_ISONSAP_STRING(nsap, nsap_length)
Definition: addrtoname.h:119
uint16_t create_osi_cksum(const uint8_t *pptr, int checksum_offset, int length)
Definition: checksum.c:139
#define ND_TCHECK_3(p)
Definition: extract.h:558
#define GET_BE_U_4(p)
Definition: extract.h:877
#define GET_BE_U_3(p)
Definition: extract.h:876
#define GET_BE_U_2(p)
Definition: extract.h:875
#define ND_TCHECK_2(p)
Definition: extract.h:555
#define ND_TTEST_2(p)
Definition: extract.h:554
#define GET_U_1(p)
Definition: extract.h:872
#define GET_IPV4_TO_HOST_ORDER(p)
Definition: extract.h:910
#define GET_CPY_BYTES(dst, p, len)
Definition: extract.h:913
#define ND_TCHECK_1(p)
Definition: extract.h:552
const struct tok gmpls_switch_cap_values[]
Definition: gmpls.c:39
const struct tok gmpls_encoding_values[]
Definition: gmpls.c:59
const struct tok diffserv_te_bc_values[]
Definition: gmpls.c:187
const struct tok gmpls_link_prot_values[]
Definition: gmpls.c:26
const struct tok gmpls_switch_cap_tsc_indication_values[]
Definition: gmpls.c:52
#define GMPLS_TSC
Definition: gmpls.h:21
#define GMPLS_PSC2
Definition: gmpls.h:17
#define GMPLS_PSC4
Definition: gmpls.h:19
#define GMPLS_PSC1
Definition: gmpls.h:16
#define GMPLS_PSC3
Definition: gmpls.h:18
#define AF_INET6
#define ND_FALL_THROUGH
unsigned char nd_uint16_t[2]
Definition: netdissect.h:47
void q933_print(netdissect_options *, const u_char *, u_int)
Definition: print-fr.c:806
void nd_print_protocol_caps(netdissect_options *)
Definition: util-print.c:421
void ip6_print(netdissect_options *, const u_char *, u_int)
Definition: print-ip6.c:226
#define ND_BYTES_BETWEEN(p1, p2)
Definition: netdissect.h:377
int print_unknown_data(netdissect_options *, const u_char *, const char *, u_int)
Definition: util-print.c:441
void nd_printjnp(netdissect_options *, const u_char *, u_int)
Definition: util-print.c:182
#define ND_TCHECK_LEN(p, l)
Definition: netdissect.h:368
const char * tok2str(const struct tok *, const char *, u_int)
Definition: util-print.c:485
#define ND_TTEST_LEN(p, l)
Definition: netdissect.h:356
#define ND_TCHECK_SIZE(p)
Definition: netdissect.h:372
#define MAC_ADDR_LEN
Definition: netdissect.h:102
char * bittok2str(const struct tok *, const char *, u_int)
Definition: util-print.c:558
void nd_print_invalid(netdissect_options *)
Definition: util-print.c:429
unsigned char nd_byte
Definition: netdissect.h:108
void nd_print_trunc(netdissect_options *)
Definition: util-print.c:409
void ip_print(netdissect_options *, const u_char *, u_int)
Definition: print-ip.c:319
unsigned char nd_ipv4[4]
Definition: netdissect.h:92
#define ND_PRINT(...)
Definition: netdissect.h:385
u_int ppp_print(netdissect_options *, const u_char *, u_int)
Definition: print-ppp.c:1509
int mask2plen(uint32_t)
Definition: util-print.c:605
unsigned char nd_uint32_t[4]
Definition: netdissect.h:49
unsigned char nd_uint8_t[1]
Definition: netdissect.h:46
unsigned char nd_ipv6[16]
Definition: netdissect.h:97
#define ND_BYTES_AVAILABLE_AFTER(p)
Definition: netdissect.h:383
const struct tok nlpid_values[]
Definition: nlpid.c:24
#define NLPID_IP6
Definition: nlpid.h:32
#define NLPID_ESIS
Definition: nlpid.h:23
#define NLPID_PPP
Definition: nlpid.h:30
#define NLPID_CLNP
Definition: nlpid.h:22
#define NLPID_NULLNS
Definition: nlpid.h:18
#define NLPID_IP
Definition: nlpid.h:29
#define NLPID_Q933
Definition: nlpid.h:19
#define NLPID_ISIS
Definition: nlpid.h:24
int snprintf(char *, size_t, const char *,...)
const struct tok oui_values[]
Definition: oui.c:26
auth_type
Definition: print-bfd.c:104
u_int version
Definition: print-isakmp.c:645
#define ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE
#define ISIS_MASK_LSP_ATT_BITS(x)
#define SYSTEM_ID_LEN
Definition: print-isoclns.c:58
#define CLNP_PDU_ERQ
static const struct tok isis_ext_ip_reach_subtlv_values[]
#define ISIS_PDU_L1_CSNP
Definition: print-isoclns.c:77
#define ISIS_PREFIX_SID_FLAG_R
static const struct tok isis_subtlv_link_attribute_values[]
#define ISIS_TLV_ROUTER_CAPABILITY
static const struct tok isis_ptp_adjancey_values[]
#define ISIS_TLV_MT_IS_REACH
#define CLNP_REQUEST_ER
#define ISIS_LSP_TYPE_LEVEL_2
#define CLNP_SEGMENT_PART
static const struct tok isis_subtlv_idrp_values[]
#define ISIS_MASK_TLV_EXTD_IP6_SUBTLV(x)
#define ISIS_LSP_TYPE_UNUSED2
#define ISIS_MASK_TLV_EXTD_IP_SUBTLV(x)
#define ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN
#define ISIS_SUBTLV_SPB_MCID
#define ESIS_OPTION_PROTOCOLS
#define ISIS_VERSION
Definition: print-isoclns.c:62
#define ISIS_PREFIX_SID_FLAG_N
#define CLNP_PDU_DT
#define CLNP_FLAG_MASK
Definition: print-isoclns.c:69
#define ISIS_PDU_L1_LAN_IIH
Definition: print-isoclns.c:72
#define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32
#define ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID
#define ISIS_TLV_RESTART_SIGNALING_FLAGLEN
static const struct tok clnp_option_rfd_general_values[]
#define ISIS_TLV_INSTANCE_ID
#define ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW
#define CLNP_OPTION_SCOPE_SA_SPEC
#define INVALID_OR_DECREMENT(length, decr)
static const struct tok clnp_pdu_values[]
#define ISIS_SUBTLV_IDRP_RES
#define ISIS_SUBTLV_AUTH_MD5_LEN
#define ISIS_MASK_TLV_SHARED_RISK_GROUP(x)
#define ISIS_TLV_IDRP_INFO
#define ISIS_PDU_PTP_IIH
Definition: print-isoclns.c:74
static void isis_print_router_cap_subtlv(netdissect_options *ndo, const uint8_t *tptr, uint8_t tlen)
static const struct tok clnp_option_rfd_class_values[]
static const struct tok clnp_option_rfd_source_routeing_values[]
#define ESIS_PDU_ESH
#define CLNP_OPTION_DISCARD_REASON
#define CLNP_OPTION_SCOPE_MASK
static int isis_print_ext_is_reach(netdissect_options *ndo, const uint8_t *tptr, const char *ident, u_int tlv_type, u_int tlv_remaining)
#define ESIS_OPTION_PRIORITY
#define ISIS_MASK_LSP_ATT_DELAY_BIT(x)
static const struct tok clnp_option_sr_rr_string_values[]
#define ISIS_SUBTLV_SPB_DIGEST
#define ISIS_PDU_L1_PSNP
Definition: print-isoclns.c:79
#define ISIS_IIH_LAN_HEADER_SIZE
static const struct tok isis_mt_port_cap_subtlv_values[]
#define ISIS_TLV_IP6_REACH
static const struct tok clnp_flag_values[]
static const struct tok isis_router_capability_subtlv_values[]
#define ISIS_TLV_RESTART_SIGNALING
static int isis_print_mt_port_cap_subtlv(netdissect_options *ndo, const uint8_t *tptr, u_int len)
#define LSP_ID_LEN
Definition: print-isoclns.c:60
#define ISIS_PTP_ADJ_UP
#define ISIS_TLV_IS_REACH
#define CLNP_MORE_SEGMENTS
#define ISIS_TLV_EXT_IS_REACH
#define ISIS_CSNP_HEADER_SIZE
#define ISIS_SUBTLV_ROUTER_CAP_SR
static u_int isis_print_extd_ip_reach(netdissect_options *ndo, const uint8_t *tptr, const char *ident, uint16_t afi)
static const struct tok isis_ext_is_reach_subtlv_values[]
#define ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR
#define ISIS_SUBTLV_IDRP_ASN
#define ISIS_SUBTLV_AUTH_SIMPLE
static const struct tok isis_is_reach_virtual_values[]
#define ESIS_OPTION_SECURITY
static int isis_print_metric_block(netdissect_options *ndo, const struct isis_metric_block *isis_metric_block)
static void isis_clear_checksum_lifetime(void *header)
#define CLNP_OPTION_SECURITY
#define ISIS_PDU_L2_LAN_IIH
Definition: print-isoclns.c:73
#define ISIS_SUBTLV_SPB_DIGEST_MIN_LEN
#define ISIS_SUBTLV_SPBM_SI
static int clnp_print(netdissect_options *, const uint8_t *, u_int)
#define ESIS_OPTION_ADDRESS_MASK
#define ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC
#define ESIS_PDU_REDIRECT
static const struct tok clnp_option_rfd_pdu_discard_values[]
#define ISIS_TLV_EXTD_IP_REACH
static uint8_t isis_print_mtid(netdissect_options *ndo, const uint8_t *tptr, const char *ident, u_int tlv_remaining)
static const struct tok clnp_option_rfd_lifetime_values[]
#define ISIS_MASK_LSP_OL_BIT(x)
static const struct tok * clnp_option_rfd_error_class[]
#define CLNP_VERSION
Definition: print-isoclns.c:64
#define ISIS_SUBTLV_EXT_IS_REACH_LAN_ADJ_SEGMENT_ID
static const struct tok isis_mt_capability_subtlv_values[]
static const struct tok clnp_option_rfd_reassembly_values[]
#define ISIS_PTP_ADJ_DOWN
#define ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW
#define ISIS_TLV_MT_CAPABILITY
void isoclns_print(netdissect_options *ndo, const u_char *p, u_int length)
static const struct tok isis_restart_flag_values[]
#define CLNP_OPTION_ROUTE_RECORDING
static const struct tok prefix_sid_flag_values[]
static const struct tok isis_router_capability_sr_flags[]
#define ISIS_TLV_CHECKSUM_MINLEN
#define ISIS_TLV_CHECKSUM
#define ESIS_OPTION_SNPA_MASK
#define ISIS_LSP_TLV_METRIC_IE(x)
static const struct tok clnp_option_values[]
static const struct tok clnp_option_qos_global_values[]
#define ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR
static const struct tok isis_tlv_values[]
#define ISIS_TLV_PART_DIS
#define ISIS_TLV_INT_IP_REACH
#define ISIS_LSP_TLV_METRIC_UPDOWN(x)
static void osi_print_cksum(netdissect_options *, const uint8_t *pptr, uint16_t checksum, int checksum_offset, u_int length)
#define ISIS_LAN_PRIORITY_MASK
Definition: print-isoclns.c:70
#define CLNP_OPTION_QOS_MAINTENANCE
#define ISIS_MASK_TLV_EXTD_IP_UPDOWN(x)
#define CLNP_OPTION_PADDING
#define ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW
#define ISIS_MASK_TLV_EXTD_IP6_IE(x)
static const struct tok prefix_sid_algo_values[]
static const struct tok isis_pdu_values[]
Definition: print-isoclns.c:82
#define CLNP_OPTION_SOURCE_ROUTING
#define ISIS_TLV_ISNEIGH
#define ISIS_MASK_LSP_ATT_ERROR_BIT(x)
static int isis_print_tlv_ip_reach(netdissect_options *ndo, const uint8_t *cp, const char *ident, u_int length)
#define ISIS_TLV_IIH_SEQNR
#define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x)
#define ISIS_SUBTLV_AUTH_PRIVATE
static int isis_print_ip_reach_subtlv(netdissect_options *ndo, const uint8_t *tptr, u_int subt, u_int subl, const char *ident)
#define ESIS_VERSION
Definition: print-isoclns.c:63
#define ISIS_SUBTLV_SPB_MCID_MIN_LEN
#define ISIS_PREFIX_SID_FLAG_P
#define ISIS_SUBTLV_EXTD_IP_REACH_PREFIX_SID
#define CLNP_OPTION_SCOPE_DA_SPEC
#define ISIS_TLV_MT_PORT_CAP
#define ISIS_SUBTLV_AUTH_MD5
#define CLNP_PDU_ER
#define ISIS_TLV_MT_IP_REACH
#define ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN
#define ISIS_SUBTLV_AUTH_GENERIC
#define ISIS_TLV_VENDOR_PRIVATE
#define ISIS_COMMON_HEADER_SIZE
#define ISIS_SUBTLV_SPB_INSTANCE
#define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64
#define ESIS_OPTION_QOS_MAINTENANCE
#define ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID
#define ISIS_TLV_MT_IP6_REACH
#define CLNP_PDU_MD
#define ISIS_TLV_HOSTNAME
static const struct tok esis_option_values[]
#define ISIS_LSP_TLV_METRIC_VALUE(x)
#define ISIS_TLV_MT_SUPPORTED
#define ISIS_TLV_PREFIX_NEIGH
#define ISIS_PSNP_HEADER_SIZE
#define ISIS_TLV_PROTOCOLS
#define ISIS_SUBTLV_IDRP_LOCAL
#define ISIS_TLV_PADDING
#define ISIS_MASK_MTFLAGS(x)
#define ESIS_OPTION_ES_CONF_TIME
#define ISIS_TLV_PTP_ADJ
static const struct tok clnp_option_rfd_address_values[]
#define ISIS_PDU_L1_LSP
Definition: print-isoclns.c:75
#define ISIS_TLV_IPADDR
#define ISIS_PDU_L2_PSNP
Definition: print-isoclns.c:80
#define ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR
#define CLNP_PDU_ERP
#define ISIS_LSP_TYPE_UNUSED0
#define ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN
static const struct tok isis_subtlv_auth_values[]
#define CLNP_OPTION_SCOPE_GLOBAL
static int isis_print(netdissect_options *, const uint8_t *, u_int)
#define ISIS_LSP_HEADER_SIZE
#define ISIS_TLV_TE_ROUTER_ID
#define ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP
#define ISIS_PREFIX_SID_FLAG_E
#define ISIS_MASK_LSP_ISTYPE_BITS(x)
#define ISIS_IIH_PTP_HEADER_SIZE
#define ISIS_SUBTLV_SPB_BVID
#define ISIS_TLV_EXT_IP_REACH
#define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x)
#define ISIS_TLV_AUTH
static void esis_print(netdissect_options *, const uint8_t *, u_int)
#define ISIS_TLV_IP6ADDR
static int isis_print_mt_capability_subtlv(netdissect_options *ndo, const uint8_t *tptr, u_int len)
static const struct tok esis_pdu_values[]
#define ISIS_TLV_IS_ALIAS_ID
#define CLNP_OPTION_PRIORITY
#define ISIS_MASK_MTID(x)
#define ESIS_PDU_TYPE_MASK
Definition: print-isoclns.c:67
#define ISIS_PDU_L2_LSP
Definition: print-isoclns.c:76
#define ISIS_LSP_TYPE_LEVEL_1
#define ISIS_LSP_TLV_METRIC_SUPPORTED(x)
static const struct tok isis_iih_circuit_type_values[]
#define ISIS_TLV_NORTEL_PRIVATE2
#define ISIS_MASK_LSP_PARTITION_BIT(x)
static char * isis_print_id(netdissect_options *ndo, const uint8_t *cp, u_int id_len)
#define ISIS_TLV_DECNET_PHASE4
#define ISIS_PREFIX_SID_FLAG_V
#define CLNP_PDU_TYPE_MASK
Definition: print-isoclns.c:68
#define ISIS_SUBTLV_SPB_METRIC
#define ISIS_PDU_L2_CSNP
Definition: print-isoclns.c:78
#define ISIS_TLV_LSP
#define ISIS_TLV_LSP_BUFFERSIZE
#define CLNP_OPTION_OPTION_QOS_MASK
#define ISIS_PREFIX_SID_FLAG_L
#define ISIS_TLV_SHARED_RISK_GROUP
#define NODE_ID_LEN
Definition: print-isoclns.c:59
#define ISIS_TLV_NORTEL_PRIVATE1
#define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS
static const struct tok clnp_option_sr_rr_values[]
static const struct tok isis_lan_adj_sid_flag_values[]
#define ISIS_TLV_ESNEIGH
#define ISIS_TLV_LUCENT_PRIVATE
static const struct tok isis_lsp_istype_values[]
static const struct tok clnp_option_scope_values[]
static const struct tok isis_mt_values[]
#define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD
static const struct tok isis_tlv_router_capability_flags[]
#define ESIS_PDU_ISH
#define ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE
static const struct tok isis_mt_flag_values[]
#define ISIS_TLV_AREA_ADDR
#define ISIS_TLV_IPAUTH
#define ISIS_PTP_ADJ_INIT
static void isis_print_mcid(netdissect_options *ndo, const struct isis_spb_mcid *mcid)
#define ISIS_TLV_POI
#define ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR
int signature_verify(netdissect_options *ndo, const u_char *pptr, u_int plen, const u_char *sig_ptr, void(*clear_rtn)(void *), const void *clear_arg)
Definition: signature.c:201
const struct tok signature_check_values[]
Definition: signature.c:34
nd_uint8_t version
nd_uint16_t segment_length
nd_uint8_t lifetime
nd_uint8_t length_indicator
nd_uint8_t type
nd_uint16_t cksum
nd_uint8_t nlpid
nd_uint16_t total_length
nd_uint16_t segment_offset
nd_uint16_t data_unit_id
nd_uint8_t version
nd_uint16_t cksum
nd_uint8_t type
nd_uint16_t holdtime
nd_uint8_t length_indicator
nd_uint8_t nlpid
nd_uint8_t fixed_len
nd_uint8_t pdu_version
nd_uint8_t id_length
nd_byte source_id[(6U+1)]
nd_uint16_t pdu_len
nd_byte end_lsp_id[(6U+2)]
nd_byte start_lsp_id[(6U+2)]
nd_uint8_t circuit_type
nd_uint16_t holding_time
nd_byte lan_id[(6U+1)]
nd_byte source_id[6U]
nd_byte source_id[6U]
nd_uint16_t holding_time
nd_uint8_t circuit_type
nd_byte lsp_id[(6U+2)]
nd_uint8_t typeblock
nd_uint16_t checksum
nd_uint16_t pdu_len
nd_uint16_t remaining_lifetime
nd_uint32_t sequence_number
nd_uint8_t metric_error
nd_uint8_t metric_default
nd_uint8_t metric_expense
nd_uint8_t metric_delay
nd_byte source_id[(6U+1)]
nd_uint16_t pdu_len
nd_uint8_t format_id
nd_byte digest[16]
nd_byte name[32]
nd_uint16_t revision_lvl
nd_uint32_t cist_external_root_path_cost
struct isis_spb_mcid aux_mcid
struct isis_spb_mcid mcid
struct isis_metric_block isis_metric_block
nd_byte neighbor_sysid[6U]
struct isis_metric_block isis_metric_block
struct isis_metric_block isis_metric_block
nd_byte neighbor_nodeid[(6U+1)]
nd_uint16_t checksum
nd_uint16_t remaining_lifetime
nd_byte lsp_id[(6U+2)]
nd_uint32_t sequence_number
nd_byte neighbor_sysid[6U]
nd_uint8_t adjacency_state
nd_uint32_t neighbor_extd_local_circuit_id
nd_uint32_t extd_local_circuit_id
const char * ndo_protocol
Definition: netdissect.h:218
static int lflag
Definition: tcpdump.c:219