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Merge pull request #42 from fxlb/master
[tcpdump] / print-isoclns.c
1 /*
2 * Copyright (c) 1992, 1993, 1994, 1995, 1996
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 *
21 * Original code by Matt Thomas, Digital Equipment Corporation
22 *
23 * Extensively modified by Hannes Gredler (hannes@juniper.net) for more
24 * complete IS-IS & CLNP support.
25 */
26
27 #ifndef lint
28 static const char rcsid[] _U_ =
29 "@(#) $Header: /tcpdump/master/tcpdump/print-isoclns.c,v 1.165 2008-08-16 13:38:15 hannes Exp $ (LBL)";
30 #endif
31
32 #ifdef HAVE_CONFIG_H
33 #include "config.h"
34 #endif
35
36 #include <tcpdump-stdinc.h>
37
38 #include <stdio.h>
39 #include <string.h>
40
41 #include "interface.h"
42 #include "addrtoname.h"
43 #include "ethertype.h"
44 #include "ether.h"
45 #include "nlpid.h"
46 #include "extract.h"
47 #include "gmpls.h"
48 #include "oui.h"
49 #include "signature.h"
50
51 /*
52 * IS-IS is defined in ISO 10589. Look there for protocol definitions.
53 */
54
55 #define SYSTEM_ID_LEN ETHER_ADDR_LEN
56 #define NODE_ID_LEN SYSTEM_ID_LEN+1
57 #define LSP_ID_LEN SYSTEM_ID_LEN+2
58
59 #define ISIS_VERSION 1
60 #define ESIS_VERSION 1
61 #define CLNP_VERSION 1
62
63 #define ISIS_PDU_TYPE_MASK 0x1F
64 #define ESIS_PDU_TYPE_MASK 0x1F
65 #define CLNP_PDU_TYPE_MASK 0x1F
66 #define CLNP_FLAG_MASK 0xE0
67 #define ISIS_LAN_PRIORITY_MASK 0x7F
68
69 #define ISIS_PDU_L1_LAN_IIH 15
70 #define ISIS_PDU_L2_LAN_IIH 16
71 #define ISIS_PDU_PTP_IIH 17
72 #define ISIS_PDU_L1_LSP 18
73 #define ISIS_PDU_L2_LSP 20
74 #define ISIS_PDU_L1_CSNP 24
75 #define ISIS_PDU_L2_CSNP 25
76 #define ISIS_PDU_L1_PSNP 26
77 #define ISIS_PDU_L2_PSNP 27
78
79 static struct tok isis_pdu_values[] = {
80 { ISIS_PDU_L1_LAN_IIH, "L1 Lan IIH"},
81 { ISIS_PDU_L2_LAN_IIH, "L2 Lan IIH"},
82 { ISIS_PDU_PTP_IIH, "p2p IIH"},
83 { ISIS_PDU_L1_LSP, "L1 LSP"},
84 { ISIS_PDU_L2_LSP, "L2 LSP"},
85 { ISIS_PDU_L1_CSNP, "L1 CSNP"},
86 { ISIS_PDU_L2_CSNP, "L2 CSNP"},
87 { ISIS_PDU_L1_PSNP, "L1 PSNP"},
88 { ISIS_PDU_L2_PSNP, "L2 PSNP"},
89 { 0, NULL}
90 };
91
92 /*
93 * A TLV is a tuple of a type, length and a value and is normally used for
94 * encoding information in all sorts of places. This is an enumeration of
95 * the well known types.
96 *
97 * list taken from rfc3359 plus some memory from veterans ;-)
98 */
99
100 #define ISIS_TLV_AREA_ADDR 1 /* iso10589 */
101 #define ISIS_TLV_IS_REACH 2 /* iso10589 */
102 #define ISIS_TLV_ESNEIGH 3 /* iso10589 */
103 #define ISIS_TLV_PART_DIS 4 /* iso10589 */
104 #define ISIS_TLV_PREFIX_NEIGH 5 /* iso10589 */
105 #define ISIS_TLV_ISNEIGH 6 /* iso10589 */
106 #define ISIS_TLV_ISNEIGH_VARLEN 7 /* iso10589 */
107 #define ISIS_TLV_PADDING 8 /* iso10589 */
108 #define ISIS_TLV_LSP 9 /* iso10589 */
109 #define ISIS_TLV_AUTH 10 /* iso10589, rfc3567 */
110 #define ISIS_TLV_CHECKSUM 12 /* rfc3358 */
111 #define ISIS_TLV_CHECKSUM_MINLEN 2
112 #define ISIS_TLV_LSP_BUFFERSIZE 14 /* iso10589 rev2 */
113 #define ISIS_TLV_LSP_BUFFERSIZE_MINLEN 2
114 #define ISIS_TLV_EXT_IS_REACH 22 /* draft-ietf-isis-traffic-05 */
115 #define ISIS_TLV_IS_ALIAS_ID 24 /* draft-ietf-isis-ext-lsp-frags-02 */
116 #define ISIS_TLV_DECNET_PHASE4 42
117 #define ISIS_TLV_LUCENT_PRIVATE 66
118 #define ISIS_TLV_INT_IP_REACH 128 /* rfc1195, rfc2966 */
119 #define ISIS_TLV_PROTOCOLS 129 /* rfc1195 */
120 #define ISIS_TLV_EXT_IP_REACH 130 /* rfc1195, rfc2966 */
121 #define ISIS_TLV_IDRP_INFO 131 /* rfc1195 */
122 #define ISIS_TLV_IDRP_INFO_MINLEN 1
123 #define ISIS_TLV_IPADDR 132 /* rfc1195 */
124 #define ISIS_TLV_IPAUTH 133 /* rfc1195 */
125 #define ISIS_TLV_TE_ROUTER_ID 134 /* draft-ietf-isis-traffic-05 */
126 #define ISIS_TLV_EXTD_IP_REACH 135 /* draft-ietf-isis-traffic-05 */
127 #define ISIS_TLV_HOSTNAME 137 /* rfc2763 */
128 #define ISIS_TLV_SHARED_RISK_GROUP 138 /* draft-ietf-isis-gmpls-extensions */
129 #define ISIS_TLV_MT_PORT_CAP 143 /* rfc6165 */
130 #define ISIS_TLV_MT_CAPABILITY 144 /* rfc6329 */
131 #define ISIS_TLV_NORTEL_PRIVATE1 176
132 #define ISIS_TLV_NORTEL_PRIVATE2 177
133 #define ISIS_TLV_RESTART_SIGNALING 211 /* rfc3847 */
134 #define ISIS_TLV_RESTART_SIGNALING_FLAGLEN 1
135 #define ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN 2
136 #define ISIS_TLV_MT_IS_REACH 222 /* draft-ietf-isis-wg-multi-topology-05 */
137 #define ISIS_TLV_MT_SUPPORTED 229 /* draft-ietf-isis-wg-multi-topology-05 */
138 #define ISIS_TLV_MT_SUPPORTED_MINLEN 2
139 #define ISIS_TLV_IP6ADDR 232 /* draft-ietf-isis-ipv6-02 */
140 #define ISIS_TLV_MT_IP_REACH 235 /* draft-ietf-isis-wg-multi-topology-05 */
141 #define ISIS_TLV_IP6_REACH 236 /* draft-ietf-isis-ipv6-02 */
142 #define ISIS_TLV_MT_IP6_REACH 237 /* draft-ietf-isis-wg-multi-topology-05 */
143 #define ISIS_TLV_PTP_ADJ 240 /* rfc3373 */
144 #define ISIS_TLV_IIH_SEQNR 241 /* draft-shen-isis-iih-sequence-00 */
145 #define ISIS_TLV_IIH_SEQNR_MINLEN 4
146 #define ISIS_TLV_VENDOR_PRIVATE 250 /* draft-ietf-isis-experimental-tlv-01 */
147 #define ISIS_TLV_VENDOR_PRIVATE_MINLEN 3
148
149 static struct tok isis_tlv_values[] = {
150 { ISIS_TLV_AREA_ADDR, "Area address(es)"},
151 { ISIS_TLV_IS_REACH, "IS Reachability"},
152 { ISIS_TLV_ESNEIGH, "ES Neighbor(s)"},
153 { ISIS_TLV_PART_DIS, "Partition DIS"},
154 { ISIS_TLV_PREFIX_NEIGH, "Prefix Neighbors"},
155 { ISIS_TLV_ISNEIGH, "IS Neighbor(s)"},
156 { ISIS_TLV_ISNEIGH_VARLEN, "IS Neighbor(s) (variable length)"},
157 { ISIS_TLV_PADDING, "Padding"},
158 { ISIS_TLV_LSP, "LSP entries"},
159 { ISIS_TLV_AUTH, "Authentication"},
160 { ISIS_TLV_CHECKSUM, "Checksum"},
161 { ISIS_TLV_LSP_BUFFERSIZE, "LSP Buffersize"},
162 { ISIS_TLV_EXT_IS_REACH, "Extended IS Reachability"},
163 { ISIS_TLV_IS_ALIAS_ID, "IS Alias ID"},
164 { ISIS_TLV_DECNET_PHASE4, "DECnet Phase IV"},
165 { ISIS_TLV_LUCENT_PRIVATE, "Lucent Proprietary"},
166 { ISIS_TLV_INT_IP_REACH, "IPv4 Internal Reachability"},
167 { ISIS_TLV_PROTOCOLS, "Protocols supported"},
168 { ISIS_TLV_EXT_IP_REACH, "IPv4 External Reachability"},
169 { ISIS_TLV_IDRP_INFO, "Inter-Domain Information Type"},
170 { ISIS_TLV_IPADDR, "IPv4 Interface address(es)"},
171 { ISIS_TLV_IPAUTH, "IPv4 authentication (deprecated)"},
172 { ISIS_TLV_TE_ROUTER_ID, "Traffic Engineering Router ID"},
173 { ISIS_TLV_EXTD_IP_REACH, "Extended IPv4 Reachability"},
174 { ISIS_TLV_SHARED_RISK_GROUP, "Shared Risk Link Group"},
175 { ISIS_TLV_MT_PORT_CAP, "Multi-Topology-Aware Port Capability"},
176 { ISIS_TLV_MT_CAPABILITY, "Multi-Topology Capability"},
177 { ISIS_TLV_NORTEL_PRIVATE1, "Nortel Proprietary"},
178 { ISIS_TLV_NORTEL_PRIVATE2, "Nortel Proprietary"},
179 { ISIS_TLV_HOSTNAME, "Hostname"},
180 { ISIS_TLV_RESTART_SIGNALING, "Restart Signaling"},
181 { ISIS_TLV_MT_IS_REACH, "Multi Topology IS Reachability"},
182 { ISIS_TLV_MT_SUPPORTED, "Multi Topology"},
183 { ISIS_TLV_IP6ADDR, "IPv6 Interface address(es)"},
184 { ISIS_TLV_MT_IP_REACH, "Multi-Topology IPv4 Reachability"},
185 { ISIS_TLV_IP6_REACH, "IPv6 reachability"},
186 { ISIS_TLV_MT_IP6_REACH, "Multi-Topology IP6 Reachability"},
187 { ISIS_TLV_PTP_ADJ, "Point-to-point Adjacency State"},
188 { ISIS_TLV_IIH_SEQNR, "Hello PDU Sequence Number"},
189 { ISIS_TLV_VENDOR_PRIVATE, "Vendor Private"},
190 { 0, NULL }
191 };
192
193 #define ESIS_OPTION_PROTOCOLS 129
194 #define ESIS_OPTION_QOS_MAINTENANCE 195 /* iso9542 */
195 #define ESIS_OPTION_SECURITY 197 /* iso9542 */
196 #define ESIS_OPTION_ES_CONF_TIME 198 /* iso9542 */
197 #define ESIS_OPTION_PRIORITY 205 /* iso9542 */
198 #define ESIS_OPTION_ADDRESS_MASK 225 /* iso9542 */
199 #define ESIS_OPTION_SNPA_MASK 226 /* iso9542 */
200
201 static struct tok esis_option_values[] = {
202 { ESIS_OPTION_PROTOCOLS, "Protocols supported"},
203 { ESIS_OPTION_QOS_MAINTENANCE, "QoS Maintenance" },
204 { ESIS_OPTION_SECURITY, "Security" },
205 { ESIS_OPTION_ES_CONF_TIME, "ES Configuration Time" },
206 { ESIS_OPTION_PRIORITY, "Priority" },
207 { ESIS_OPTION_ADDRESS_MASK, "Addressk Mask" },
208 { ESIS_OPTION_SNPA_MASK, "SNPA Mask" },
209 { 0, NULL }
210 };
211
212 #define CLNP_OPTION_DISCARD_REASON 193
213 #define CLNP_OPTION_QOS_MAINTENANCE 195 /* iso8473 */
214 #define CLNP_OPTION_SECURITY 197 /* iso8473 */
215 #define CLNP_OPTION_SOURCE_ROUTING 200 /* iso8473 */
216 #define CLNP_OPTION_ROUTE_RECORDING 203 /* iso8473 */
217 #define CLNP_OPTION_PADDING 204 /* iso8473 */
218 #define CLNP_OPTION_PRIORITY 205 /* iso8473 */
219
220 static struct tok clnp_option_values[] = {
221 { CLNP_OPTION_DISCARD_REASON, "Discard Reason"},
222 { CLNP_OPTION_PRIORITY, "Priority"},
223 { CLNP_OPTION_QOS_MAINTENANCE, "QoS Maintenance"},
224 { CLNP_OPTION_SECURITY, "Security"},
225 { CLNP_OPTION_SOURCE_ROUTING, "Source Routing"},
226 { CLNP_OPTION_ROUTE_RECORDING, "Route Recording"},
227 { CLNP_OPTION_PADDING, "Padding"},
228 { 0, NULL }
229 };
230
231 static struct tok clnp_option_rfd_class_values[] = {
232 { 0x0, "General"},
233 { 0x8, "Address"},
234 { 0x9, "Source Routeing"},
235 { 0xa, "Lifetime"},
236 { 0xb, "PDU Discarded"},
237 { 0xc, "Reassembly"},
238 { 0, NULL }
239 };
240
241 static struct tok clnp_option_rfd_general_values[] = {
242 { 0x0, "Reason not specified"},
243 { 0x1, "Protocol procedure error"},
244 { 0x2, "Incorrect checksum"},
245 { 0x3, "PDU discarded due to congestion"},
246 { 0x4, "Header syntax error (cannot be parsed)"},
247 { 0x5, "Segmentation needed but not permitted"},
248 { 0x6, "Incomplete PDU received"},
249 { 0x7, "Duplicate option"},
250 { 0, NULL }
251 };
252
253 static struct tok clnp_option_rfd_address_values[] = {
254 { 0x0, "Destination address unreachable"},
255 { 0x1, "Destination address unknown"},
256 { 0, NULL }
257 };
258
259 static struct tok clnp_option_rfd_source_routeing_values[] = {
260 { 0x0, "Unspecified source routeing error"},
261 { 0x1, "Syntax error in source routeing field"},
262 { 0x2, "Unknown address in source routeing field"},
263 { 0x3, "Path not acceptable"},
264 { 0, NULL }
265 };
266
267 static struct tok clnp_option_rfd_lifetime_values[] = {
268 { 0x0, "Lifetime expired while data unit in transit"},
269 { 0x1, "Lifetime expired during reassembly"},
270 { 0, NULL }
271 };
272
273 static struct tok clnp_option_rfd_pdu_discard_values[] = {
274 { 0x0, "Unsupported option not specified"},
275 { 0x1, "Unsupported protocol version"},
276 { 0x2, "Unsupported security option"},
277 { 0x3, "Unsupported source routeing option"},
278 { 0x4, "Unsupported recording of route option"},
279 { 0, NULL }
280 };
281
282 static struct tok clnp_option_rfd_reassembly_values[] = {
283 { 0x0, "Reassembly interference"},
284 { 0, NULL }
285 };
286
287 /* array of 16 error-classes */
288 static struct tok *clnp_option_rfd_error_class[] = {
289 clnp_option_rfd_general_values,
290 NULL,
291 NULL,
292 NULL,
293 NULL,
294 NULL,
295 NULL,
296 NULL,
297 clnp_option_rfd_address_values,
298 clnp_option_rfd_source_routeing_values,
299 clnp_option_rfd_lifetime_values,
300 clnp_option_rfd_pdu_discard_values,
301 clnp_option_rfd_reassembly_values,
302 NULL,
303 NULL,
304 NULL
305 };
306
307 #define CLNP_OPTION_OPTION_QOS_MASK 0x3f
308 #define CLNP_OPTION_SCOPE_MASK 0xc0
309 #define CLNP_OPTION_SCOPE_SA_SPEC 0x40
310 #define CLNP_OPTION_SCOPE_DA_SPEC 0x80
311 #define CLNP_OPTION_SCOPE_GLOBAL 0xc0
312
313 static struct tok clnp_option_scope_values[] = {
314 { CLNP_OPTION_SCOPE_SA_SPEC, "Source Address Specific"},
315 { CLNP_OPTION_SCOPE_DA_SPEC, "Destination Address Specific"},
316 { CLNP_OPTION_SCOPE_GLOBAL, "Globally unique"},
317 { 0, NULL }
318 };
319
320 static struct tok clnp_option_sr_rr_values[] = {
321 { 0x0, "partial"},
322 { 0x1, "complete"},
323 { 0, NULL }
324 };
325
326 static struct tok clnp_option_sr_rr_string_values[] = {
327 { CLNP_OPTION_SOURCE_ROUTING, "source routing"},
328 { CLNP_OPTION_ROUTE_RECORDING, "recording of route in progress"},
329 { 0, NULL }
330 };
331
332 static struct tok clnp_option_qos_global_values[] = {
333 { 0x20, "reserved"},
334 { 0x10, "sequencing vs. delay"},
335 { 0x08, "congested"},
336 { 0x04, "delay vs. cost"},
337 { 0x02, "error vs. delay"},
338 { 0x01, "error vs. cost"},
339 { 0, NULL }
340 };
341
342 #define ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP 3 /* draft-ietf-isis-traffic-05 */
343 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID 4 /* rfc4205 */
344 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID 5 /* draft-ietf-isis-traffic-05 */
345 #define ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR 6 /* draft-ietf-isis-traffic-05 */
346 #define ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR 8 /* draft-ietf-isis-traffic-05 */
347 #define ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW 9 /* draft-ietf-isis-traffic-05 */
348 #define ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW 10 /* draft-ietf-isis-traffic-05 */
349 #define ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW 11 /* rfc4124 */
350 #define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD 12 /* draft-ietf-tewg-diff-te-proto-06 */
351 #define ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC 18 /* draft-ietf-isis-traffic-05 */
352 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE 19 /* draft-ietf-isis-link-attr-01 */
353 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE 20 /* rfc4205 */
354 #define ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR 21 /* rfc4205 */
355 #define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS 22 /* rfc4124 */
356
357 #define ISIS_SUBTLV_SPB_METRIC 29 /* rfc6329 */
358
359 static struct tok isis_ext_is_reach_subtlv_values[] = {
360 { ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP, "Administrative groups" },
361 { ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" },
362 { ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID, "Link Remote Identifier" },
363 { ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR, "IPv4 interface address" },
364 { ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR, "IPv4 neighbor address" },
365 { ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW, "Maximum link bandwidth" },
366 { ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW, "Reservable link bandwidth" },
367 { ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW, "Unreserved bandwidth" },
368 { ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC, "Traffic Engineering Metric" },
369 { ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE, "Link Attribute" },
370 { ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE, "Link Protection Type" },
371 { ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR, "Interface Switching Capability" },
372 { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD, "Bandwidth Constraints (old)" },
373 { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS, "Bandwidth Constraints" },
374 { ISIS_SUBTLV_SPB_METRIC, "SPB Metric" },
375 { 250, "Reserved for cisco specific extensions" },
376 { 251, "Reserved for cisco specific extensions" },
377 { 252, "Reserved for cisco specific extensions" },
378 { 253, "Reserved for cisco specific extensions" },
379 { 254, "Reserved for cisco specific extensions" },
380 { 255, "Reserved for future expansion" },
381 { 0, NULL }
382 };
383
384 #define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32 1 /* draft-ietf-isis-admin-tags-01 */
385 #define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64 2 /* draft-ietf-isis-admin-tags-01 */
386 #define ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR 117 /* draft-ietf-isis-wg-multi-topology-05 */
387
388 static struct tok isis_ext_ip_reach_subtlv_values[] = {
389 { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32, "32-Bit Administrative tag" },
390 { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64, "64-Bit Administrative tag" },
391 { ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR, "Management Prefix Color" },
392 { 0, NULL }
393 };
394
395 static struct tok isis_subtlv_link_attribute_values[] = {
396 { 0x01, "Local Protection Available" },
397 { 0x02, "Link excluded from local protection path" },
398 { 0x04, "Local maintenance required"},
399 { 0, NULL }
400 };
401
402 #define ISIS_SUBTLV_AUTH_SIMPLE 1
403 #define ISIS_SUBTLV_AUTH_GENERIC 3 /* rfc 5310 */
404 #define ISIS_SUBTLV_AUTH_MD5 54
405 #define ISIS_SUBTLV_AUTH_MD5_LEN 16
406 #define ISIS_SUBTLV_AUTH_PRIVATE 255
407
408 static struct tok isis_subtlv_auth_values[] = {
409 { ISIS_SUBTLV_AUTH_SIMPLE, "simple text password"},
410 { ISIS_SUBTLV_AUTH_GENERIC, "Generic Crypto key-id"},
411 { ISIS_SUBTLV_AUTH_MD5, "HMAC-MD5 password"},
412 { ISIS_SUBTLV_AUTH_PRIVATE, "Routing Domain private password"},
413 { 0, NULL }
414 };
415
416 #define ISIS_SUBTLV_IDRP_RES 0
417 #define ISIS_SUBTLV_IDRP_LOCAL 1
418 #define ISIS_SUBTLV_IDRP_ASN 2
419
420 static struct tok isis_subtlv_idrp_values[] = {
421 { ISIS_SUBTLV_IDRP_RES, "Reserved"},
422 { ISIS_SUBTLV_IDRP_LOCAL, "Routing-Domain Specific"},
423 { ISIS_SUBTLV_IDRP_ASN, "AS Number Tag"},
424 { 0, NULL}
425 };
426
427 #define ISIS_SUBTLV_SPB_MCID 4
428 #define ISIS_SUBTLV_SPB_DIGEST 5
429 #define ISIS_SUBTLV_SPB_BVID 6
430
431 #define ISIS_SUBTLV_SPB_INSTANCE 1
432 #define ISIS_SUBTLV_SPBM_SI 3
433
434 #define ISIS_SPB_MCID_LEN 51
435 #define ISIS_SUBTLV_SPB_MCID_MIN_LEN 102
436 #define ISIS_SUBTLV_SPB_DIGEST_MIN_LEN 33
437 #define ISIS_SUBTLV_SPB_BVID_MIN_LEN 6
438 #define ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN 19
439 #define ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN 8
440
441 static struct tok isis_mt_port_cap_subtlv_values[] = {
442 { ISIS_SUBTLV_SPB_MCID, "SPB MCID" },
443 { ISIS_SUBTLV_SPB_DIGEST, "SPB Digest" },
444 { ISIS_SUBTLV_SPB_BVID, "SPB BVID" },
445 { 0, NULL }
446 };
447
448 static struct tok isis_mt_capability_subtlv_values[] = {
449 { ISIS_SUBTLV_SPB_INSTANCE, "SPB Instance" },
450 { ISIS_SUBTLV_SPBM_SI, "SPBM Service Identifier and Unicast Address" },
451 { 0, NULL }
452 };
453
454 struct isis_spb_mcid {
455 u_int8_t format_id;
456 u_int8_t name[32];
457 u_int8_t revision_lvl[2];
458 u_int8_t digest[16];
459 };
460
461 struct isis_subtlv_spb_mcid {
462 struct isis_spb_mcid mcid;
463 struct isis_spb_mcid aux_mcid;
464 };
465
466 struct isis_subtlv_spb_instance {
467 u_int8_t cist_root_id[8];
468 u_int8_t cist_external_root_path_cost[4];
469 u_int8_t bridge_priority[2];
470 u_int8_t spsourceid[4];
471 u_int8_t no_of_trees;
472 };
473
474 #define CLNP_SEGMENT_PART 0x80
475 #define CLNP_MORE_SEGMENTS 0x40
476 #define CLNP_REQUEST_ER 0x20
477
478 static struct tok clnp_flag_values[] = {
479 { CLNP_SEGMENT_PART, "Segmentation permitted"},
480 { CLNP_MORE_SEGMENTS, "more Segments"},
481 { CLNP_REQUEST_ER, "request Error Report"},
482 { 0, NULL}
483 };
484
485 #define ISIS_MASK_LSP_OL_BIT(x) ((x)&0x4)
486 #define ISIS_MASK_LSP_ISTYPE_BITS(x) ((x)&0x3)
487 #define ISIS_MASK_LSP_PARTITION_BIT(x) ((x)&0x80)
488 #define ISIS_MASK_LSP_ATT_BITS(x) ((x)&0x78)
489 #define ISIS_MASK_LSP_ATT_ERROR_BIT(x) ((x)&0x40)
490 #define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x) ((x)&0x20)
491 #define ISIS_MASK_LSP_ATT_DELAY_BIT(x) ((x)&0x10)
492 #define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x) ((x)&0x8)
493
494 #define ISIS_MASK_MTID(x) ((x)&0x0fff)
495 #define ISIS_MASK_MTFLAGS(x) ((x)&0xf000)
496
497 static struct tok isis_mt_flag_values[] = {
498 { 0x4000, "ATT bit set"},
499 { 0x8000, "Overload bit set"},
500 { 0, NULL}
501 };
502
503 #define ISIS_MASK_TLV_EXTD_IP_UPDOWN(x) ((x)&0x80)
504 #define ISIS_MASK_TLV_EXTD_IP_SUBTLV(x) ((x)&0x40)
505
506 #define ISIS_MASK_TLV_EXTD_IP6_IE(x) ((x)&0x40)
507 #define ISIS_MASK_TLV_EXTD_IP6_SUBTLV(x) ((x)&0x20)
508
509 #define ISIS_LSP_TLV_METRIC_SUPPORTED(x) ((x)&0x80)
510 #define ISIS_LSP_TLV_METRIC_IE(x) ((x)&0x40)
511 #define ISIS_LSP_TLV_METRIC_UPDOWN(x) ((x)&0x80)
512 #define ISIS_LSP_TLV_METRIC_VALUE(x) ((x)&0x3f)
513
514 #define ISIS_MASK_TLV_SHARED_RISK_GROUP(x) ((x)&0x1)
515
516 static struct tok isis_mt_values[] = {
517 { 0, "IPv4 unicast"},
518 { 1, "In-Band Management"},
519 { 2, "IPv6 unicast"},
520 { 3, "Multicast"},
521 { 4095, "Development, Experimental or Proprietary"},
522 { 0, NULL }
523 };
524
525 static struct tok isis_iih_circuit_type_values[] = {
526 { 1, "Level 1 only"},
527 { 2, "Level 2 only"},
528 { 3, "Level 1, Level 2"},
529 { 0, NULL}
530 };
531
532 #define ISIS_LSP_TYPE_UNUSED0 0
533 #define ISIS_LSP_TYPE_LEVEL_1 1
534 #define ISIS_LSP_TYPE_UNUSED2 2
535 #define ISIS_LSP_TYPE_LEVEL_2 3
536
537 static struct tok isis_lsp_istype_values[] = {
538 { ISIS_LSP_TYPE_UNUSED0, "Unused 0x0 (invalid)"},
539 { ISIS_LSP_TYPE_LEVEL_1, "L1 IS"},
540 { ISIS_LSP_TYPE_UNUSED2, "Unused 0x2 (invalid)"},
541 { ISIS_LSP_TYPE_LEVEL_2, "L2 IS"},
542 { 0, NULL }
543 };
544
545 /*
546 * Katz's point to point adjacency TLV uses codes to tell us the state of
547 * the remote adjacency. Enumerate them.
548 */
549
550 #define ISIS_PTP_ADJ_UP 0
551 #define ISIS_PTP_ADJ_INIT 1
552 #define ISIS_PTP_ADJ_DOWN 2
553
554 static struct tok isis_ptp_adjancey_values[] = {
555 { ISIS_PTP_ADJ_UP, "Up" },
556 { ISIS_PTP_ADJ_INIT, "Initializing" },
557 { ISIS_PTP_ADJ_DOWN, "Down" },
558 { 0, NULL}
559 };
560
561 struct isis_tlv_ptp_adj {
562 u_int8_t adjacency_state;
563 u_int8_t extd_local_circuit_id[4];
564 u_int8_t neighbor_sysid[SYSTEM_ID_LEN];
565 u_int8_t neighbor_extd_local_circuit_id[4];
566 };
567
568 static void osi_print_cksum(const u_int8_t *pptr, u_int16_t checksum,
569 u_int checksum_offset, u_int length);
570 static int clnp_print(const u_int8_t *, u_int);
571 static void esis_print(const u_int8_t *, u_int);
572 static int isis_print(const u_int8_t *, u_int);
573
574 struct isis_metric_block {
575 u_int8_t metric_default;
576 u_int8_t metric_delay;
577 u_int8_t metric_expense;
578 u_int8_t metric_error;
579 };
580
581 struct isis_tlv_is_reach {
582 struct isis_metric_block isis_metric_block;
583 u_int8_t neighbor_nodeid[NODE_ID_LEN];
584 };
585
586 struct isis_tlv_es_reach {
587 struct isis_metric_block isis_metric_block;
588 u_int8_t neighbor_sysid[SYSTEM_ID_LEN];
589 };
590
591 struct isis_tlv_ip_reach {
592 struct isis_metric_block isis_metric_block;
593 u_int8_t prefix[4];
594 u_int8_t mask[4];
595 };
596
597 static struct tok isis_is_reach_virtual_values[] = {
598 { 0, "IsNotVirtual"},
599 { 1, "IsVirtual"},
600 { 0, NULL }
601 };
602
603 static struct tok isis_restart_flag_values[] = {
604 { 0x1, "Restart Request"},
605 { 0x2, "Restart Acknowledgement"},
606 { 0x4, "Suppress adjacency advertisement"},
607 { 0, NULL }
608 };
609
610 struct isis_common_header {
611 u_int8_t nlpid;
612 u_int8_t fixed_len;
613 u_int8_t version; /* Protocol version */
614 u_int8_t id_length;
615 u_int8_t pdu_type; /* 3 MSbits are reserved */
616 u_int8_t pdu_version; /* Packet format version */
617 u_int8_t reserved;
618 u_int8_t max_area;
619 };
620
621 struct isis_iih_lan_header {
622 u_int8_t circuit_type;
623 u_int8_t source_id[SYSTEM_ID_LEN];
624 u_int8_t holding_time[2];
625 u_int8_t pdu_len[2];
626 u_int8_t priority;
627 u_int8_t lan_id[NODE_ID_LEN];
628 };
629
630 struct isis_iih_ptp_header {
631 u_int8_t circuit_type;
632 u_int8_t source_id[SYSTEM_ID_LEN];
633 u_int8_t holding_time[2];
634 u_int8_t pdu_len[2];
635 u_int8_t circuit_id;
636 };
637
638 struct isis_lsp_header {
639 u_int8_t pdu_len[2];
640 u_int8_t remaining_lifetime[2];
641 u_int8_t lsp_id[LSP_ID_LEN];
642 u_int8_t sequence_number[4];
643 u_int8_t checksum[2];
644 u_int8_t typeblock;
645 };
646
647 struct isis_csnp_header {
648 u_int8_t pdu_len[2];
649 u_int8_t source_id[NODE_ID_LEN];
650 u_int8_t start_lsp_id[LSP_ID_LEN];
651 u_int8_t end_lsp_id[LSP_ID_LEN];
652 };
653
654 struct isis_psnp_header {
655 u_int8_t pdu_len[2];
656 u_int8_t source_id[NODE_ID_LEN];
657 };
658
659 struct isis_tlv_lsp {
660 u_int8_t remaining_lifetime[2];
661 u_int8_t lsp_id[LSP_ID_LEN];
662 u_int8_t sequence_number[4];
663 u_int8_t checksum[2];
664 };
665
666 #define ISIS_COMMON_HEADER_SIZE (sizeof(struct isis_common_header))
667 #define ISIS_IIH_LAN_HEADER_SIZE (sizeof(struct isis_iih_lan_header))
668 #define ISIS_IIH_PTP_HEADER_SIZE (sizeof(struct isis_iih_ptp_header))
669 #define ISIS_LSP_HEADER_SIZE (sizeof(struct isis_lsp_header))
670 #define ISIS_CSNP_HEADER_SIZE (sizeof(struct isis_csnp_header))
671 #define ISIS_PSNP_HEADER_SIZE (sizeof(struct isis_psnp_header))
672
673 void isoclns_print(const u_int8_t *p, u_int length, u_int caplen)
674 {
675 if (caplen <= 1) { /* enough bytes on the wire ? */
676 printf("|OSI");
677 return;
678 }
679
680 if (eflag)
681 printf("OSI NLPID %s (0x%02x): ",
682 tok2str(nlpid_values,"Unknown",*p),
683 *p);
684
685 switch (*p) {
686
687 case NLPID_CLNP:
688 if (!clnp_print(p, length))
689 print_unknown_data(p,"\n\t",caplen);
690 break;
691
692 case NLPID_ESIS:
693 esis_print(p, length);
694 return;
695
696 case NLPID_ISIS:
697 if (!isis_print(p, length))
698 print_unknown_data(p,"\n\t",caplen);
699 break;
700
701 case NLPID_NULLNS:
702 (void)printf("%slength: %u",
703 eflag ? "" : ", ",
704 length);
705 break;
706
707 case NLPID_Q933:
708 q933_print(p+1, length-1);
709 break;
710
711 case NLPID_IP:
712 ip_print(gndo, p+1, length-1);
713 break;
714
715 #ifdef INET6
716 case NLPID_IP6:
717 ip6_print(gndo, p+1, length-1);
718 break;
719 #endif
720
721 case NLPID_PPP:
722 ppp_print(p+1, length-1);
723 break;
724
725 default:
726 if (!eflag)
727 printf("OSI NLPID 0x%02x unknown",*p);
728 (void)printf("%slength: %u",
729 eflag ? "" : ", ",
730 length);
731 if (caplen > 1)
732 print_unknown_data(p,"\n\t",caplen);
733 break;
734 }
735 }
736
737 #define CLNP_PDU_ER 1
738 #define CLNP_PDU_DT 28
739 #define CLNP_PDU_MD 29
740 #define CLNP_PDU_ERQ 30
741 #define CLNP_PDU_ERP 31
742
743 static struct tok clnp_pdu_values[] = {
744 { CLNP_PDU_ER, "Error Report"},
745 { CLNP_PDU_MD, "MD"},
746 { CLNP_PDU_DT, "Data"},
747 { CLNP_PDU_ERQ, "Echo Request"},
748 { CLNP_PDU_ERP, "Echo Response"},
749 { 0, NULL }
750 };
751
752 struct clnp_header_t {
753 u_int8_t nlpid;
754 u_int8_t length_indicator;
755 u_int8_t version;
756 u_int8_t lifetime; /* units of 500ms */
757 u_int8_t type;
758 u_int8_t segment_length[2];
759 u_int8_t cksum[2];
760 };
761
762 struct clnp_segment_header_t {
763 u_int8_t data_unit_id[2];
764 u_int8_t segment_offset[2];
765 u_int8_t total_length[2];
766 };
767
768 /*
769 * clnp_print
770 * Decode CLNP packets. Return 0 on error.
771 */
772
773 static int clnp_print (const u_int8_t *pptr, u_int length)
774 {
775 const u_int8_t *optr,*source_address,*dest_address;
776 u_int li,tlen,nsap_offset,source_address_length,dest_address_length, clnp_pdu_type, clnp_flags;
777 const struct clnp_header_t *clnp_header;
778 const struct clnp_segment_header_t *clnp_segment_header;
779 u_int8_t rfd_error_major,rfd_error_minor;
780
781 clnp_header = (const struct clnp_header_t *) pptr;
782 TCHECK(*clnp_header);
783
784 li = clnp_header->length_indicator;
785 optr = pptr;
786
787 if (!eflag)
788 printf("CLNP");
789
790 /*
791 * Sanity checking of the header.
792 */
793
794 if (clnp_header->version != CLNP_VERSION) {
795 printf("version %d packet not supported", clnp_header->version);
796 return (0);
797 }
798
799 /* FIXME further header sanity checking */
800
801 clnp_pdu_type = clnp_header->type & CLNP_PDU_TYPE_MASK;
802 clnp_flags = clnp_header->type & CLNP_FLAG_MASK;
803
804 pptr += sizeof(struct clnp_header_t);
805 li -= sizeof(struct clnp_header_t);
806 dest_address_length = *pptr;
807 dest_address = pptr + 1;
808
809 pptr += (1 + dest_address_length);
810 li -= (1 + dest_address_length);
811 source_address_length = *pptr;
812 source_address = pptr +1;
813
814 pptr += (1 + source_address_length);
815 li -= (1 + source_address_length);
816
817 if (vflag < 1) {
818 printf("%s%s > %s, %s, length %u",
819 eflag ? "" : ", ",
820 isonsap_string(source_address, source_address_length),
821 isonsap_string(dest_address, dest_address_length),
822 tok2str(clnp_pdu_values,"unknown (%u)",clnp_pdu_type),
823 length);
824 return (1);
825 }
826 printf("%slength %u",eflag ? "" : ", ",length);
827
828 printf("\n\t%s PDU, hlen: %u, v: %u, lifetime: %u.%us, Segment PDU length: %u, checksum: 0x%04x",
829 tok2str(clnp_pdu_values, "unknown (%u)",clnp_pdu_type),
830 clnp_header->length_indicator,
831 clnp_header->version,
832 clnp_header->lifetime/2,
833 (clnp_header->lifetime%2)*5,
834 EXTRACT_16BITS(clnp_header->segment_length),
835 EXTRACT_16BITS(clnp_header->cksum));
836
837 osi_print_cksum(optr, EXTRACT_16BITS(clnp_header->cksum), 7,
838 clnp_header->length_indicator);
839
840 printf("\n\tFlags [%s]",
841 bittok2str(clnp_flag_values,"none",clnp_flags));
842
843 printf("\n\tsource address (length %u): %s\n\tdest address (length %u): %s",
844 source_address_length,
845 isonsap_string(source_address, source_address_length),
846 dest_address_length,
847 isonsap_string(dest_address,dest_address_length));
848
849 if (clnp_flags & CLNP_SEGMENT_PART) {
850 clnp_segment_header = (const struct clnp_segment_header_t *) pptr;
851 TCHECK(*clnp_segment_header);
852 printf("\n\tData Unit ID: 0x%04x, Segment Offset: %u, Total PDU Length: %u",
853 EXTRACT_16BITS(clnp_segment_header->data_unit_id),
854 EXTRACT_16BITS(clnp_segment_header->segment_offset),
855 EXTRACT_16BITS(clnp_segment_header->total_length));
856 pptr+=sizeof(const struct clnp_segment_header_t);
857 li-=sizeof(const struct clnp_segment_header_t);
858 }
859
860 /* now walk the options */
861 while (li >= 2) {
862 u_int op, opli;
863 const u_int8_t *tptr;
864
865 TCHECK2(*pptr, 2);
866 if (li < 2) {
867 printf(", bad opts/li");
868 return (0);
869 }
870 op = *pptr++;
871 opli = *pptr++;
872 li -= 2;
873 TCHECK2(*pptr, opli);
874 if (opli > li) {
875 printf(", opt (%d) too long", op);
876 return (0);
877 }
878 li -= opli;
879 tptr = pptr;
880 tlen = opli;
881
882 printf("\n\t %s Option #%u, length %u, value: ",
883 tok2str(clnp_option_values,"Unknown",op),
884 op,
885 opli);
886
887 switch (op) {
888
889
890 case CLNP_OPTION_ROUTE_RECORDING: /* those two options share the format */
891 case CLNP_OPTION_SOURCE_ROUTING:
892 printf("%s %s",
893 tok2str(clnp_option_sr_rr_values,"Unknown",*tptr),
894 tok2str(clnp_option_sr_rr_string_values,"Unknown Option %u",op));
895 nsap_offset=*(tptr+1);
896 if (nsap_offset == 0) {
897 printf(" Bad NSAP offset (0)");
898 break;
899 }
900 nsap_offset-=1; /* offset to nsap list */
901 if (nsap_offset > tlen) {
902 printf(" Bad NSAP offset (past end of option)");
903 break;
904 }
905 tptr+=nsap_offset;
906 tlen-=nsap_offset;
907 while (tlen > 0) {
908 source_address_length=*tptr;
909 if (tlen < source_address_length+1) {
910 printf("\n\t NSAP address goes past end of option");
911 break;
912 }
913 if (source_address_length > 0) {
914 source_address=(tptr+1);
915 TCHECK2(*source_address, source_address_length);
916 printf("\n\t NSAP address (length %u): %s",
917 source_address_length,
918 isonsap_string(source_address, source_address_length));
919 }
920 tlen-=source_address_length+1;
921 }
922 break;
923
924 case CLNP_OPTION_PRIORITY:
925 printf("0x%1x", *tptr&0x0f);
926 break;
927
928 case CLNP_OPTION_QOS_MAINTENANCE:
929 printf("\n\t Format Code: %s",
930 tok2str(clnp_option_scope_values,"Reserved",*tptr&CLNP_OPTION_SCOPE_MASK));
931
932 if ((*tptr&CLNP_OPTION_SCOPE_MASK) == CLNP_OPTION_SCOPE_GLOBAL)
933 printf("\n\t QoS Flags [%s]",
934 bittok2str(clnp_option_qos_global_values,
935 "none",
936 *tptr&CLNP_OPTION_OPTION_QOS_MASK));
937 break;
938
939 case CLNP_OPTION_SECURITY:
940 printf("\n\t Format Code: %s, Security-Level %u",
941 tok2str(clnp_option_scope_values,"Reserved",*tptr&CLNP_OPTION_SCOPE_MASK),
942 *(tptr+1));
943 break;
944
945 case CLNP_OPTION_DISCARD_REASON:
946 rfd_error_major = (*tptr&0xf0) >> 4;
947 rfd_error_minor = *tptr&0x0f;
948 printf("\n\t Class: %s Error (0x%01x), %s (0x%01x)",
949 tok2str(clnp_option_rfd_class_values,"Unknown",rfd_error_major),
950 rfd_error_major,
951 tok2str(clnp_option_rfd_error_class[rfd_error_major],"Unknown",rfd_error_minor),
952 rfd_error_minor);
953 break;
954
955 case CLNP_OPTION_PADDING:
956 printf("padding data");
957 break;
958
959 /*
960 * FIXME those are the defined Options that lack a decoder
961 * you are welcome to contribute code ;-)
962 */
963
964 default:
965 print_unknown_data(tptr,"\n\t ",opli);
966 break;
967 }
968 if (vflag > 1)
969 print_unknown_data(pptr,"\n\t ",opli);
970 pptr += opli;
971 }
972
973 switch (clnp_pdu_type) {
974
975 case CLNP_PDU_ER: /* fall through */
976 case CLNP_PDU_ERP:
977 TCHECK(*pptr);
978 if (*(pptr) == NLPID_CLNP) {
979 printf("\n\t-----original packet-----\n\t");
980 /* FIXME recursion protection */
981 clnp_print(pptr, length-clnp_header->length_indicator);
982 break;
983 }
984
985 case CLNP_PDU_DT:
986 case CLNP_PDU_MD:
987 case CLNP_PDU_ERQ:
988
989 default:
990 /* dump the PDU specific data */
991 if (length-(pptr-optr) > 0) {
992 printf("\n\t undecoded non-header data, length %u",length-clnp_header->length_indicator);
993 print_unknown_data(pptr,"\n\t ",length-(pptr-optr));
994 }
995 }
996
997 return (1);
998
999 trunc:
1000 fputs("[|clnp]", stdout);
1001 return (1);
1002
1003 }
1004
1005
1006 #define ESIS_PDU_REDIRECT 6
1007 #define ESIS_PDU_ESH 2
1008 #define ESIS_PDU_ISH 4
1009
1010 static struct tok esis_pdu_values[] = {
1011 { ESIS_PDU_REDIRECT, "redirect"},
1012 { ESIS_PDU_ESH, "ESH"},
1013 { ESIS_PDU_ISH, "ISH"},
1014 { 0, NULL }
1015 };
1016
1017 struct esis_header_t {
1018 u_int8_t nlpid;
1019 u_int8_t length_indicator;
1020 u_int8_t version;
1021 u_int8_t reserved;
1022 u_int8_t type;
1023 u_int8_t holdtime[2];
1024 u_int8_t cksum[2];
1025 };
1026
1027 static void
1028 esis_print(const u_int8_t *pptr, u_int length)
1029 {
1030 const u_int8_t *optr;
1031 u_int li,esis_pdu_type,source_address_length, source_address_number;
1032 const struct esis_header_t *esis_header;
1033
1034 if (!eflag)
1035 printf("ES-IS");
1036
1037 if (length <= 2) {
1038 if (qflag)
1039 printf("bad pkt!");
1040 else
1041 printf("no header at all!");
1042 return;
1043 }
1044
1045 esis_header = (const struct esis_header_t *) pptr;
1046 TCHECK(*esis_header);
1047 li = esis_header->length_indicator;
1048 optr = pptr;
1049
1050 /*
1051 * Sanity checking of the header.
1052 */
1053
1054 if (esis_header->nlpid != NLPID_ESIS) {
1055 printf(" nlpid 0x%02x packet not supported", esis_header->nlpid);
1056 return;
1057 }
1058
1059 if (esis_header->version != ESIS_VERSION) {
1060 printf(" version %d packet not supported", esis_header->version);
1061 return;
1062 }
1063
1064 if (li > length) {
1065 printf(" length indicator(%d) > PDU size (%d)!", li, length);
1066 return;
1067 }
1068
1069 if (li < sizeof(struct esis_header_t) + 2) {
1070 printf(" length indicator < min PDU size %d:", li);
1071 while (--length != 0)
1072 printf("%02X", *pptr++);
1073 return;
1074 }
1075
1076 esis_pdu_type = esis_header->type & ESIS_PDU_TYPE_MASK;
1077
1078 if (vflag < 1) {
1079 printf("%s%s, length %u",
1080 eflag ? "" : ", ",
1081 tok2str(esis_pdu_values,"unknown type (%u)",esis_pdu_type),
1082 length);
1083 return;
1084 } else
1085 printf("%slength %u\n\t%s (%u)",
1086 eflag ? "" : ", ",
1087 length,
1088 tok2str(esis_pdu_values,"unknown type: %u", esis_pdu_type),
1089 esis_pdu_type);
1090
1091 printf(", v: %u%s", esis_header->version, esis_header->version == ESIS_VERSION ? "" : "unsupported" );
1092 printf(", checksum: 0x%04x", EXTRACT_16BITS(esis_header->cksum));
1093
1094 osi_print_cksum(pptr, EXTRACT_16BITS(esis_header->cksum), 7, li);
1095
1096 printf(", holding time: %us, length indicator: %u",EXTRACT_16BITS(esis_header->holdtime),li);
1097
1098 if (vflag > 1)
1099 print_unknown_data(optr,"\n\t",sizeof(struct esis_header_t));
1100
1101 pptr += sizeof(struct esis_header_t);
1102 li -= sizeof(struct esis_header_t);
1103
1104 switch (esis_pdu_type) {
1105 case ESIS_PDU_REDIRECT: {
1106 const u_int8_t *dst, *snpa, *neta;
1107 u_int dstl, snpal, netal;
1108
1109 TCHECK(*pptr);
1110 if (li < 1) {
1111 printf(", bad redirect/li");
1112 return;
1113 }
1114 dstl = *pptr;
1115 pptr++;
1116 li--;
1117 TCHECK2(*pptr, dstl);
1118 if (li < dstl) {
1119 printf(", bad redirect/li");
1120 return;
1121 }
1122 dst = pptr;
1123 pptr += dstl;
1124 li -= dstl;
1125 printf("\n\t %s", isonsap_string(dst,dstl));
1126
1127 TCHECK(*pptr);
1128 if (li < 1) {
1129 printf(", bad redirect/li");
1130 return;
1131 }
1132 snpal = *pptr;
1133 pptr++;
1134 li--;
1135 TCHECK2(*pptr, snpal);
1136 if (li < snpal) {
1137 printf(", bad redirect/li");
1138 return;
1139 }
1140 snpa = pptr;
1141 pptr += snpal;
1142 li -= snpal;
1143 TCHECK(*pptr);
1144 if (li < 1) {
1145 printf(", bad redirect/li");
1146 return;
1147 }
1148 netal = *pptr;
1149 pptr++;
1150 TCHECK2(*pptr, netal);
1151 if (li < netal) {
1152 printf(", bad redirect/li");
1153 return;
1154 }
1155 neta = pptr;
1156 pptr += netal;
1157 li -= netal;
1158
1159 if (netal == 0)
1160 printf("\n\t %s", etheraddr_string(snpa));
1161 else
1162 printf("\n\t %s", isonsap_string(neta,netal));
1163 break;
1164 }
1165
1166 case ESIS_PDU_ESH:
1167 TCHECK(*pptr);
1168 if (li < 1) {
1169 printf(", bad esh/li");
1170 return;
1171 }
1172 source_address_number = *pptr;
1173 pptr++;
1174 li--;
1175
1176 printf("\n\t Number of Source Addresses: %u", source_address_number);
1177
1178 while (source_address_number > 0) {
1179 TCHECK(*pptr);
1180 if (li < 1) {
1181 printf(", bad esh/li");
1182 return;
1183 }
1184 source_address_length = *pptr;
1185 pptr++;
1186 li--;
1187
1188 TCHECK2(*pptr, source_address_length);
1189 if (li < source_address_length) {
1190 printf(", bad esh/li");
1191 return;
1192 }
1193 printf("\n\t NET (length: %u): %s",
1194 source_address_length,
1195 isonsap_string(pptr,source_address_length));
1196 pptr += source_address_length;
1197 li -= source_address_length;
1198 source_address_number--;
1199 }
1200
1201 break;
1202
1203 case ESIS_PDU_ISH: {
1204 TCHECK(*pptr);
1205 if (li < 1) {
1206 printf(", bad ish/li");
1207 return;
1208 }
1209 source_address_length = *pptr;
1210 pptr++;
1211 li--;
1212 TCHECK2(*pptr, source_address_length);
1213 if (li < source_address_length) {
1214 printf(", bad ish/li");
1215 return;
1216 }
1217 printf("\n\t NET (length: %u): %s", source_address_length, isonsap_string(pptr, source_address_length));
1218 pptr += source_address_length;
1219 li -= source_address_length;
1220 break;
1221 }
1222
1223 default:
1224 if (vflag <= 1) {
1225 if (pptr < snapend)
1226 print_unknown_data(pptr,"\n\t ",snapend-pptr);
1227 }
1228 return;
1229 }
1230
1231 /* now walk the options */
1232 while (li != 0) {
1233 u_int op, opli;
1234 const u_int8_t *tptr;
1235
1236 if (li < 2) {
1237 printf(", bad opts/li");
1238 return;
1239 }
1240 TCHECK2(*pptr, 2);
1241 op = *pptr++;
1242 opli = *pptr++;
1243 li -= 2;
1244 if (opli > li) {
1245 printf(", opt (%d) too long", op);
1246 return;
1247 }
1248 li -= opli;
1249 tptr = pptr;
1250
1251 printf("\n\t %s Option #%u, length %u, value: ",
1252 tok2str(esis_option_values,"Unknown",op),
1253 op,
1254 opli);
1255
1256 switch (op) {
1257
1258 case ESIS_OPTION_ES_CONF_TIME:
1259 if (opli == 2) {
1260 TCHECK2(*pptr, 2);
1261 printf("%us", EXTRACT_16BITS(tptr));
1262 } else
1263 printf("(bad length)");
1264 break;
1265
1266 case ESIS_OPTION_PROTOCOLS:
1267 while (opli>0) {
1268 TCHECK(*pptr);
1269 printf("%s (0x%02x)",
1270 tok2str(nlpid_values,
1271 "unknown",
1272 *tptr),
1273 *tptr);
1274 if (opli>1) /* further NPLIDs ? - put comma */
1275 printf(", ");
1276 tptr++;
1277 opli--;
1278 }
1279 break;
1280
1281 /*
1282 * FIXME those are the defined Options that lack a decoder
1283 * you are welcome to contribute code ;-)
1284 */
1285
1286 case ESIS_OPTION_QOS_MAINTENANCE:
1287 case ESIS_OPTION_SECURITY:
1288 case ESIS_OPTION_PRIORITY:
1289 case ESIS_OPTION_ADDRESS_MASK:
1290 case ESIS_OPTION_SNPA_MASK:
1291
1292 default:
1293 print_unknown_data(tptr,"\n\t ",opli);
1294 break;
1295 }
1296 if (vflag > 1)
1297 print_unknown_data(pptr,"\n\t ",opli);
1298 pptr += opli;
1299 }
1300 trunc:
1301 return;
1302 }
1303
1304
1305 static void
1306 isis_print_mcid (const struct isis_spb_mcid *mcid)
1307 {
1308 int i;
1309
1310 printf( "ID: %d, Name: ", mcid->format_id);
1311
1312 for(i=0; i<32; i++)
1313 {
1314 printf("%c", mcid->name[i]);
1315 if(mcid->name[i] == '\0')
1316 break;
1317 }
1318
1319 printf("\n\t Lvl: %d",
1320 EXTRACT_16BITS(mcid->revision_lvl));
1321
1322 printf( ", Digest: ");
1323
1324 for(i=0;i<16;i++)
1325 printf("%.2x ",mcid->digest[i]);
1326 }
1327
1328 static int
1329 isis_print_mt_port_cap_subtlv (const u_int8_t *tptr, int len)
1330 {
1331 int stlv_type;
1332 int stlv_len;
1333 const struct isis_subtlv_spb_mcid *subtlv_spb_mcid;
1334 int i;
1335
1336 while (len > 0)
1337 {
1338 stlv_type = *(tptr++);
1339 stlv_len = *(tptr++);
1340
1341 /* first lets see if we know the subTLVs name*/
1342 printf("\n\t %s subTLV #%u, length: %u",
1343 tok2str(isis_mt_port_cap_subtlv_values, "unknown", stlv_type),
1344 stlv_type,
1345 stlv_len);
1346
1347 len = len -2;
1348
1349 switch (stlv_type)
1350 {
1351 case ISIS_SUBTLV_SPB_MCID:
1352
1353 if (!TTEST2(*(tptr), ISIS_SUBTLV_SPB_MCID_MIN_LEN))
1354 goto trunctlv;
1355
1356 subtlv_spb_mcid = (struct isis_subtlv_spb_mcid *)tptr;
1357
1358 printf( "\n\t MCID: ");
1359 isis_print_mcid (&(subtlv_spb_mcid->mcid));
1360
1361 printf( "\n\t AUX-MCID: ");
1362 isis_print_mcid (&(subtlv_spb_mcid->aux_mcid));
1363
1364 tptr = tptr + sizeof(struct isis_subtlv_spb_mcid);
1365 len = len - sizeof(struct isis_subtlv_spb_mcid);
1366
1367 break;
1368
1369 case ISIS_SUBTLV_SPB_DIGEST:
1370
1371 if (!TTEST2(*(tptr), ISIS_SUBTLV_SPB_DIGEST_MIN_LEN))
1372 goto trunctlv;
1373
1374 printf ("\n\t RES: %d V: %d A: %d D: %d",
1375 (*(tptr) >> 5), (((*tptr)>> 4) & 0x01),
1376 ((*(tptr) >> 2) & 0x03), ((*tptr) & 0x03));
1377
1378 tptr++;
1379
1380 printf( "\n\t Digest: ");
1381
1382 for(i=1;i<=8; i++)
1383 {
1384 printf("%08x ", EXTRACT_32BITS(tptr));
1385 if (i%4 == 0 && i != 8)
1386 printf("\n\t ");
1387 tptr = tptr + 4;
1388 }
1389
1390 len = len - ISIS_SUBTLV_SPB_DIGEST_MIN_LEN;
1391
1392 break;
1393
1394 case ISIS_SUBTLV_SPB_BVID:
1395
1396 if (!TTEST2(*(tptr), stlv_len))
1397 goto trunctlv;
1398
1399 while (len)
1400 {
1401 if (!TTEST2(*(tptr), ISIS_SUBTLV_SPB_BVID_MIN_LEN))
1402 goto trunctlv;
1403
1404 printf("\n\t ECT: %08x",
1405 EXTRACT_32BITS(tptr));
1406
1407 tptr = tptr+4;
1408
1409 printf(" B-Vlan: %d, U:%01x, M:%01x RES: %01x",
1410 (EXTRACT_16BITS (tptr) >> 4) ,
1411 (EXTRACT_16BITS (tptr) >> 3) & 0x01,
1412 (EXTRACT_16BITS (tptr) >> 2) & 0x01,
1413 (EXTRACT_16BITS (tptr) & 0x03));
1414
1415 tptr = tptr + 2;
1416 len = len - ISIS_SUBTLV_SPB_BVID_MIN_LEN;
1417 }
1418
1419 break;
1420
1421 default:
1422 break;
1423 }
1424 }
1425
1426 return 0;
1427
1428 trunctlv:
1429 printf("\n\t\t packet exceeded snapshot");
1430 return(1);
1431 }
1432
1433
1434 static int
1435 isis_print_mt_capability_subtlv (const u_int8_t *tptr, int len)
1436 {
1437 int stlv_type, stlv_len, tmp;
1438
1439 while (len > 0)
1440 {
1441 stlv_type = *(tptr++);
1442 stlv_len = *(tptr++);
1443
1444 /* first lets see if we know the subTLVs name*/
1445 printf("\n\t %s subTLV #%u, length: %u",
1446 tok2str(isis_mt_capability_subtlv_values, "unknown", stlv_type),
1447 stlv_type,
1448 stlv_len);
1449
1450 len = len - 2;
1451
1452 switch (stlv_type)
1453 {
1454 case ISIS_SUBTLV_SPB_INSTANCE:
1455
1456 if (!TTEST2(*(tptr), ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN))
1457 goto trunctlv;
1458
1459 printf("\n\t CIST Root-ID: %08x", EXTRACT_32BITS(tptr));
1460 tptr = tptr+4;
1461 printf(" %08x", EXTRACT_32BITS(tptr));
1462 tptr = tptr+4;
1463 printf(", Path Cost: %08x", EXTRACT_32BITS(tptr));
1464 tptr = tptr+4;
1465 printf(", Prio: %d", EXTRACT_16BITS(tptr));
1466 tptr = tptr + 2;
1467 printf("\n\t RES: %d",
1468 EXTRACT_16BITS(tptr) >> 5);
1469 printf(", V: %d",
1470 (EXTRACT_16BITS(tptr) >> 4) & 0x0001);
1471 printf(", SPSource-ID: %d",
1472 (EXTRACT_32BITS(tptr) & 0x000fffff));
1473 tptr = tptr+4;
1474 printf(", No of Trees: %x", *(tptr));
1475
1476 tmp = *(tptr++);
1477
1478 len = len - ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN;
1479
1480 while (tmp)
1481 {
1482 if (!TTEST2(*(tptr), ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN))
1483 goto trunctlv;
1484
1485 printf ("\n\t U:%d, M:%d, A:%d, RES:%d",
1486 *(tptr) >> 7, (*(tptr) >> 6) & 0x01,
1487 (*(tptr) >> 5) & 0x01, (*(tptr) & 0x1f));
1488
1489 tptr++;
1490
1491 printf (", ECT: %08x", EXTRACT_32BITS(tptr));
1492
1493 tptr = tptr + 4;
1494
1495 printf (", BVID: %d, SPVID: %d",
1496 (EXTRACT_24BITS(tptr) >> 12) & 0x000fff,
1497 EXTRACT_24BITS(tptr) & 0x000fff);
1498
1499 tptr = tptr + 3;
1500 len = len - ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN;
1501 tmp--;
1502 }
1503
1504 break;
1505
1506 case ISIS_SUBTLV_SPBM_SI:
1507
1508 if (!TTEST2(*(tptr), 6))
1509 goto trunctlv;
1510
1511 printf("\n\t BMAC: %08x", EXTRACT_32BITS(tptr));
1512 tptr = tptr+4;
1513 printf("%04x", EXTRACT_16BITS(tptr));
1514 tptr = tptr+2;
1515
1516 printf (", RES: %d, VID: %d", EXTRACT_16BITS(tptr) >> 12,
1517 (EXTRACT_16BITS(tptr)) & 0x0fff);
1518
1519 tptr = tptr+2;
1520 len = len - 8;
1521 stlv_len = stlv_len - 8;
1522
1523 while (stlv_len)
1524 {
1525 printf("\n\t T: %d, R: %d, RES: %d, ISID: %d",
1526 (EXTRACT_32BITS(tptr) >> 31),
1527 (EXTRACT_32BITS(tptr) >> 30) & 0x01,
1528 (EXTRACT_32BITS(tptr) >> 24) & 0x03f,
1529 (EXTRACT_32BITS(tptr)) & 0x0ffffff);
1530
1531 tptr = tptr + 4;
1532 len = len - 4;
1533 stlv_len = stlv_len - 4;
1534 }
1535
1536 break;
1537
1538 default:
1539 break;
1540 }
1541 }
1542 return 0;
1543
1544 trunctlv:
1545 printf("\n\t\t packet exceeded snapshot");
1546 return(1);
1547 }
1548
1549
1550 /* shared routine for printing system, node and lsp-ids */
1551 static char *
1552 isis_print_id(const u_int8_t *cp, int id_len)
1553 {
1554 int i;
1555 static char id[sizeof("xxxx.xxxx.xxxx.yy-zz")];
1556 char *pos = id;
1557
1558 for (i = 1; i <= SYSTEM_ID_LEN; i++) {
1559 snprintf(pos, sizeof(id) - (pos - id), "%02x", *cp++);
1560 pos += strlen(pos);
1561 if (i == 2 || i == 4)
1562 *pos++ = '.';
1563 }
1564 if (id_len >= NODE_ID_LEN) {
1565 snprintf(pos, sizeof(id) - (pos - id), ".%02x", *cp++);
1566 pos += strlen(pos);
1567 }
1568 if (id_len == LSP_ID_LEN)
1569 snprintf(pos, sizeof(id) - (pos - id), "-%02x", *cp);
1570 return (id);
1571 }
1572
1573 /* print the 4-byte metric block which is common found in the old-style TLVs */
1574 static int
1575 isis_print_metric_block (const struct isis_metric_block *isis_metric_block)
1576 {
1577 printf(", Default Metric: %d, %s",
1578 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_default),
1579 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_default) ? "External" : "Internal");
1580 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_delay))
1581 printf("\n\t\t Delay Metric: %d, %s",
1582 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_delay),
1583 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_delay) ? "External" : "Internal");
1584 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_expense))
1585 printf("\n\t\t Expense Metric: %d, %s",
1586 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_expense),
1587 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_expense) ? "External" : "Internal");
1588 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_error))
1589 printf("\n\t\t Error Metric: %d, %s",
1590 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_error),
1591 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_error) ? "External" : "Internal");
1592
1593 return(1); /* everything is ok */
1594 }
1595
1596 static int
1597 isis_print_tlv_ip_reach (const u_int8_t *cp, const char *ident, int length)
1598 {
1599 int prefix_len;
1600 const struct isis_tlv_ip_reach *tlv_ip_reach;
1601
1602 tlv_ip_reach = (const struct isis_tlv_ip_reach *)cp;
1603
1604 while (length > 0) {
1605 if ((size_t)length < sizeof(*tlv_ip_reach)) {
1606 printf("short IPv4 Reachability (%d vs %lu)",
1607 length,
1608 (unsigned long)sizeof(*tlv_ip_reach));
1609 return (0);
1610 }
1611
1612 if (!TTEST(*tlv_ip_reach))
1613 return (0);
1614
1615 prefix_len = mask2plen(EXTRACT_32BITS(tlv_ip_reach->mask));
1616
1617 if (prefix_len == -1)
1618 printf("%sIPv4 prefix: %s mask %s",
1619 ident,
1620 ipaddr_string((tlv_ip_reach->prefix)),
1621 ipaddr_string((tlv_ip_reach->mask)));
1622 else
1623 printf("%sIPv4 prefix: %15s/%u",
1624 ident,
1625 ipaddr_string((tlv_ip_reach->prefix)),
1626 prefix_len);
1627
1628 printf(", Distribution: %s, Metric: %u, %s",
1629 ISIS_LSP_TLV_METRIC_UPDOWN(tlv_ip_reach->isis_metric_block.metric_default) ? "down" : "up",
1630 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_default),
1631 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_default) ? "External" : "Internal");
1632
1633 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_delay))
1634 printf("%s Delay Metric: %u, %s",
1635 ident,
1636 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_delay),
1637 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_delay) ? "External" : "Internal");
1638
1639 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_expense))
1640 printf("%s Expense Metric: %u, %s",
1641 ident,
1642 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_expense),
1643 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_expense) ? "External" : "Internal");
1644
1645 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_error))
1646 printf("%s Error Metric: %u, %s",
1647 ident,
1648 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_error),
1649 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_error) ? "External" : "Internal");
1650
1651 length -= sizeof(struct isis_tlv_ip_reach);
1652 tlv_ip_reach++;
1653 }
1654 return (1);
1655 }
1656
1657 /*
1658 * this is the common IP-REACH subTLV decoder it is called
1659 * from various EXTD-IP REACH TLVs (135,235,236,237)
1660 */
1661
1662 static int
1663 isis_print_ip_reach_subtlv (const u_int8_t *tptr,int subt,int subl,const char *ident) {
1664
1665 /* first lets see if we know the subTLVs name*/
1666 printf("%s%s subTLV #%u, length: %u",
1667 ident,
1668 tok2str(isis_ext_ip_reach_subtlv_values,
1669 "unknown",
1670 subt),
1671 subt,
1672 subl);
1673
1674 if (!TTEST2(*tptr,subl))
1675 goto trunctlv;
1676
1677 switch(subt) {
1678 case ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR: /* fall through */
1679 case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32:
1680 while (subl >= 4) {
1681 printf(", 0x%08x (=%u)",
1682 EXTRACT_32BITS(tptr),
1683 EXTRACT_32BITS(tptr));
1684 tptr+=4;
1685 subl-=4;
1686 }
1687 break;
1688 case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64:
1689 while (subl >= 8) {
1690 printf(", 0x%08x%08x",
1691 EXTRACT_32BITS(tptr),
1692 EXTRACT_32BITS(tptr+4));
1693 tptr+=8;
1694 subl-=8;
1695 }
1696 break;
1697 default:
1698 if(!print_unknown_data(tptr,"\n\t\t ",
1699 subl))
1700 return(0);
1701 break;
1702 }
1703 return(1);
1704
1705 trunctlv:
1706 printf("%spacket exceeded snapshot",ident);
1707 return(0);
1708 }
1709
1710 /*
1711 * this is the common IS-REACH subTLV decoder it is called
1712 * from isis_print_ext_is_reach()
1713 */
1714
1715 static int
1716 isis_print_is_reach_subtlv (const u_int8_t *tptr,u_int subt,u_int subl,const char *ident) {
1717
1718 u_int te_class,priority_level,gmpls_switch_cap;
1719 union { /* int to float conversion buffer for several subTLVs */
1720 float f;
1721 u_int32_t i;
1722 } bw;
1723
1724 /* first lets see if we know the subTLVs name*/
1725 printf("%s%s subTLV #%u, length: %u",
1726 ident,
1727 tok2str(isis_ext_is_reach_subtlv_values,
1728 "unknown",
1729 subt),
1730 subt,
1731 subl);
1732
1733 if (!TTEST2(*tptr,subl))
1734 goto trunctlv;
1735
1736 switch(subt) {
1737 case ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP:
1738 case ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID:
1739 case ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID:
1740 if (subl >= 4) {
1741 printf(", 0x%08x", EXTRACT_32BITS(tptr));
1742 if (subl == 8) /* rfc4205 */
1743 printf(", 0x%08x", EXTRACT_32BITS(tptr+4));
1744 }
1745 break;
1746 case ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR:
1747 case ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR:
1748 if (subl >= sizeof(struct in_addr))
1749 printf(", %s", ipaddr_string(tptr));
1750 break;
1751 case ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW :
1752 case ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW:
1753 if (subl >= 4) {
1754 bw.i = EXTRACT_32BITS(tptr);
1755 printf(", %.3f Mbps", bw.f*8/1000000 );
1756 }
1757 break;
1758 case ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW :
1759 if (subl >= 32) {
1760 for (te_class = 0; te_class < 8; te_class++) {
1761 bw.i = EXTRACT_32BITS(tptr);
1762 printf("%s TE-Class %u: %.3f Mbps",
1763 ident,
1764 te_class,
1765 bw.f*8/1000000 );
1766 tptr+=4;
1767 }
1768 }
1769 break;
1770 case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS: /* fall through */
1771 case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD:
1772 printf("%sBandwidth Constraints Model ID: %s (%u)",
1773 ident,
1774 tok2str(diffserv_te_bc_values, "unknown", *tptr),
1775 *tptr);
1776 tptr++;
1777 /* decode BCs until the subTLV ends */
1778 for (te_class = 0; te_class < (subl-1)/4; te_class++) {
1779 bw.i = EXTRACT_32BITS(tptr);
1780 printf("%s Bandwidth constraint CT%u: %.3f Mbps",
1781 ident,
1782 te_class,
1783 bw.f*8/1000000 );
1784 tptr+=4;
1785 }
1786 break;
1787 case ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC:
1788 if (subl >= 3)
1789 printf(", %u", EXTRACT_24BITS(tptr));
1790 break;
1791 case ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE:
1792 if (subl == 2) {
1793 printf(", [ %s ] (0x%04x)",
1794 bittok2str(isis_subtlv_link_attribute_values,
1795 "Unknown",
1796 EXTRACT_16BITS(tptr)),
1797 EXTRACT_16BITS(tptr));
1798 }
1799 break;
1800 case ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE:
1801 if (subl >= 2) {
1802 printf(", %s, Priority %u",
1803 bittok2str(gmpls_link_prot_values, "none", *tptr),
1804 *(tptr+1));
1805 }
1806 break;
1807 case ISIS_SUBTLV_SPB_METRIC:
1808 if (subl >= 6) {
1809 printf (", LM: %u", EXTRACT_24BITS(tptr));
1810 tptr=tptr+3;
1811 printf (", P: %u", *(tptr));
1812 printf (", P-ID: %u", EXTRACT_16BITS(++tptr));
1813 }
1814 break;
1815 case ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR:
1816 if (subl >= 36) {
1817 gmpls_switch_cap = *tptr;
1818 printf("%s Interface Switching Capability:%s",
1819 ident,
1820 tok2str(gmpls_switch_cap_values, "Unknown", gmpls_switch_cap));
1821 printf(", LSP Encoding: %s",
1822 tok2str(gmpls_encoding_values, "Unknown", *(tptr+1)));
1823 tptr+=4;
1824 printf("%s Max LSP Bandwidth:",ident);
1825 for (priority_level = 0; priority_level < 8; priority_level++) {
1826 bw.i = EXTRACT_32BITS(tptr);
1827 printf("%s priority level %d: %.3f Mbps",
1828 ident,
1829 priority_level,
1830 bw.f*8/1000000 );
1831 tptr+=4;
1832 }
1833 subl-=36;
1834 switch (gmpls_switch_cap) {
1835 case GMPLS_PSC1:
1836 case GMPLS_PSC2:
1837 case GMPLS_PSC3:
1838 case GMPLS_PSC4:
1839 bw.i = EXTRACT_32BITS(tptr);
1840 printf("%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f*8/1000000);
1841 printf("%s Interface MTU: %u", ident, EXTRACT_16BITS(tptr+4));
1842 break;
1843 case GMPLS_TSC:
1844 bw.i = EXTRACT_32BITS(tptr);
1845 printf("%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f*8/1000000);
1846 printf("%s Indication %s", ident,
1847 tok2str(gmpls_switch_cap_tsc_indication_values, "Unknown (%u)", *(tptr+4)));
1848 break;
1849 default:
1850 /* there is some optional stuff left to decode but this is as of yet
1851 not specified so just lets hexdump what is left */
1852 if(subl>0){
1853 if(!print_unknown_data(tptr,"\n\t\t ",
1854 subl))
1855 return(0);
1856 }
1857 }
1858 }
1859 break;
1860 default:
1861 if(!print_unknown_data(tptr,"\n\t\t ",
1862 subl))
1863 return(0);
1864 break;
1865 }
1866 return(1);
1867
1868 trunctlv:
1869 printf("%spacket exceeded snapshot",ident);
1870 return(0);
1871 }
1872
1873
1874 /*
1875 * this is the common IS-REACH decoder it is called
1876 * from various EXTD-IS REACH style TLVs (22,24,222)
1877 */
1878
1879 static int
1880 isis_print_ext_is_reach (const u_int8_t *tptr,const char *ident, int tlv_type) {
1881
1882 char ident_buffer[20];
1883 int subtlv_type,subtlv_len,subtlv_sum_len;
1884 int proc_bytes = 0; /* how many bytes did we process ? */
1885
1886 if (!TTEST2(*tptr, NODE_ID_LEN))
1887 return(0);
1888
1889 printf("%sIS Neighbor: %s", ident, isis_print_id(tptr, NODE_ID_LEN));
1890 tptr+=(NODE_ID_LEN);
1891
1892 if (tlv_type != ISIS_TLV_IS_ALIAS_ID) { /* the Alias TLV Metric field is implicit 0 */
1893 if (!TTEST2(*tptr, 3)) /* and is therefore skipped */
1894 return(0);
1895 printf(", Metric: %d",EXTRACT_24BITS(tptr));
1896 tptr+=3;
1897 }
1898
1899 if (!TTEST2(*tptr, 1))
1900 return(0);
1901 subtlv_sum_len=*(tptr++); /* read out subTLV length */
1902 proc_bytes=NODE_ID_LEN+3+1;
1903 printf(", %ssub-TLVs present",subtlv_sum_len ? "" : "no ");
1904 if (subtlv_sum_len) {
1905 printf(" (%u)",subtlv_sum_len);
1906 while (subtlv_sum_len>0) {
1907 if (!TTEST2(*tptr,2))
1908 return(0);
1909 subtlv_type=*(tptr++);
1910 subtlv_len=*(tptr++);
1911 /* prepend the ident string */
1912 snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident);
1913 if(!isis_print_is_reach_subtlv(tptr,subtlv_type,subtlv_len,ident_buffer))
1914 return(0);
1915 tptr+=subtlv_len;
1916 subtlv_sum_len-=(subtlv_len+2);
1917 proc_bytes+=(subtlv_len+2);
1918 }
1919 }
1920 return(proc_bytes);
1921 }
1922
1923 /*
1924 * this is the common Multi Topology ID decoder
1925 * it is called from various MT-TLVs (222,229,235,237)
1926 */
1927
1928 static int
1929 isis_print_mtid (const u_int8_t *tptr,const char *ident) {
1930
1931 if (!TTEST2(*tptr, 2))
1932 return(0);
1933
1934 printf("%s%s",
1935 ident,
1936 tok2str(isis_mt_values,
1937 "Reserved for IETF Consensus",
1938 ISIS_MASK_MTID(EXTRACT_16BITS(tptr))));
1939
1940 printf(" Topology (0x%03x), Flags: [%s]",
1941 ISIS_MASK_MTID(EXTRACT_16BITS(tptr)),
1942 bittok2str(isis_mt_flag_values, "none",ISIS_MASK_MTFLAGS(EXTRACT_16BITS(tptr))));
1943
1944 return(2);
1945 }
1946
1947 /*
1948 * this is the common extended IP reach decoder
1949 * it is called from TLVs (135,235,236,237)
1950 * we process the TLV and optional subTLVs and return
1951 * the amount of processed bytes
1952 */
1953
1954 static int
1955 isis_print_extd_ip_reach (const u_int8_t *tptr, const char *ident, u_int16_t afi) {
1956
1957 char ident_buffer[20];
1958 #ifdef INET6
1959 u_int8_t prefix[sizeof(struct in6_addr)]; /* shared copy buffer for IPv4 and IPv6 prefixes */
1960 #else
1961 u_int8_t prefix[sizeof(struct in_addr)]; /* shared copy buffer for IPv4 prefixes */
1962 #endif
1963 u_int metric, status_byte, bit_length, byte_length, sublen, processed, subtlvtype, subtlvlen;
1964
1965 if (!TTEST2(*tptr, 4))
1966 return (0);
1967 metric = EXTRACT_32BITS(tptr);
1968 processed=4;
1969 tptr+=4;
1970
1971 if (afi == AF_INET) {
1972 if (!TTEST2(*tptr, 1)) /* fetch status byte */
1973 return (0);
1974 status_byte=*(tptr++);
1975 bit_length = status_byte&0x3f;
1976 if (bit_length > 32) {
1977 printf("%sIPv4 prefix: bad bit length %u",
1978 ident,
1979 bit_length);
1980 return (0);
1981 }
1982 processed++;
1983 #ifdef INET6
1984 } else if (afi == AF_INET6) {
1985 if (!TTEST2(*tptr, 1)) /* fetch status & prefix_len byte */
1986 return (0);
1987 status_byte=*(tptr++);
1988 bit_length=*(tptr++);
1989 if (bit_length > 128) {
1990 printf("%sIPv6 prefix: bad bit length %u",
1991 ident,
1992 bit_length);
1993 return (0);
1994 }
1995 processed+=2;
1996 #endif
1997 } else
1998 return (0); /* somebody is fooling us */
1999
2000 byte_length = (bit_length + 7) / 8; /* prefix has variable length encoding */
2001
2002 if (!TTEST2(*tptr, byte_length))
2003 return (0);
2004 memset(prefix, 0, sizeof prefix); /* clear the copy buffer */
2005 memcpy(prefix,tptr,byte_length); /* copy as much as is stored in the TLV */
2006 tptr+=byte_length;
2007 processed+=byte_length;
2008
2009 if (afi == AF_INET)
2010 printf("%sIPv4 prefix: %15s/%u",
2011 ident,
2012 ipaddr_string(prefix),
2013 bit_length);
2014 #ifdef INET6
2015 if (afi == AF_INET6)
2016 printf("%sIPv6 prefix: %s/%u",
2017 ident,
2018 ip6addr_string(prefix),
2019 bit_length);
2020 #endif
2021
2022 printf(", Distribution: %s, Metric: %u",
2023 ISIS_MASK_TLV_EXTD_IP_UPDOWN(status_byte) ? "down" : "up",
2024 metric);
2025
2026 if (afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte))
2027 printf(", sub-TLVs present");
2028 #ifdef INET6
2029 if (afi == AF_INET6)
2030 printf(", %s%s",
2031 ISIS_MASK_TLV_EXTD_IP6_IE(status_byte) ? "External" : "Internal",
2032 ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte) ? ", sub-TLVs present" : "");
2033 #endif
2034
2035 if ((afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte))
2036 #ifdef INET6
2037 || (afi == AF_INET6 && ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte))
2038 #endif
2039 ) {
2040 /* assume that one prefix can hold more
2041 than one subTLV - therefore the first byte must reflect
2042 the aggregate bytecount of the subTLVs for this prefix
2043 */
2044 if (!TTEST2(*tptr, 1))
2045 return (0);
2046 sublen=*(tptr++);
2047 processed+=sublen+1;
2048 printf(" (%u)",sublen); /* print out subTLV length */
2049
2050 while (sublen>0) {
2051 if (!TTEST2(*tptr,2))
2052 return (0);
2053 subtlvtype=*(tptr++);
2054 subtlvlen=*(tptr++);
2055 /* prepend the ident string */
2056 snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident);
2057 if(!isis_print_ip_reach_subtlv(tptr,subtlvtype,subtlvlen,ident_buffer))
2058 return(0);
2059 tptr+=subtlvlen;
2060 sublen-=(subtlvlen+2);
2061 }
2062 }
2063 return (processed);
2064 }
2065
2066 /*
2067 * isis_print
2068 * Decode IS-IS packets. Return 0 on error.
2069 */
2070
2071 static int isis_print (const u_int8_t *p, u_int length)
2072 {
2073 const struct isis_common_header *isis_header;
2074
2075 const struct isis_iih_lan_header *header_iih_lan;
2076 const struct isis_iih_ptp_header *header_iih_ptp;
2077 struct isis_lsp_header *header_lsp;
2078 const struct isis_csnp_header *header_csnp;
2079 const struct isis_psnp_header *header_psnp;
2080
2081 const struct isis_tlv_lsp *tlv_lsp;
2082 const struct isis_tlv_ptp_adj *tlv_ptp_adj;
2083 const struct isis_tlv_is_reach *tlv_is_reach;
2084 const struct isis_tlv_es_reach *tlv_es_reach;
2085
2086 u_int8_t pdu_type, max_area, id_length, tlv_type, tlv_len, tmp, alen, lan_alen, prefix_len;
2087 u_int8_t ext_is_len, ext_ip_len, mt_len;
2088 const u_int8_t *optr, *pptr, *tptr;
2089 u_short packet_len,pdu_len, key_id;
2090 u_int i,vendor_id;
2091 int sigcheck;
2092
2093 packet_len=length;
2094 optr = p; /* initialize the _o_riginal pointer to the packet start -
2095 need it for parsing the checksum TLV and authentication
2096 TLV verification */
2097 isis_header = (const struct isis_common_header *)p;
2098 TCHECK(*isis_header);
2099 pptr = p+(ISIS_COMMON_HEADER_SIZE);
2100 header_iih_lan = (const struct isis_iih_lan_header *)pptr;
2101 header_iih_ptp = (const struct isis_iih_ptp_header *)pptr;
2102 header_lsp = (struct isis_lsp_header *)pptr;
2103 header_csnp = (const struct isis_csnp_header *)pptr;
2104 header_psnp = (const struct isis_psnp_header *)pptr;
2105
2106 if (!eflag)
2107 printf("IS-IS");
2108
2109 /*
2110 * Sanity checking of the header.
2111 */
2112
2113 if (isis_header->version != ISIS_VERSION) {
2114 printf("version %d packet not supported", isis_header->version);
2115 return (0);
2116 }
2117
2118 if ((isis_header->id_length != SYSTEM_ID_LEN) && (isis_header->id_length != 0)) {
2119 printf("system ID length of %d is not supported",
2120 isis_header->id_length);
2121 return (0);
2122 }
2123
2124 if (isis_header->pdu_version != ISIS_VERSION) {
2125 printf("version %d packet not supported", isis_header->pdu_version);
2126 return (0);
2127 }
2128
2129 max_area = isis_header->max_area;
2130 switch(max_area) {
2131 case 0:
2132 max_area = 3; /* silly shit */
2133 break;
2134 case 255:
2135 printf("bad packet -- 255 areas");
2136 return (0);
2137 default:
2138 break;
2139 }
2140
2141 id_length = isis_header->id_length;
2142 switch(id_length) {
2143 case 0:
2144 id_length = 6; /* silly shit again */
2145 break;
2146 case 1: /* 1-8 are valid sys-ID lenghts */
2147 case 2:
2148 case 3:
2149 case 4:
2150 case 5:
2151 case 6:
2152 case 7:
2153 case 8:
2154 break;
2155 case 255:
2156 id_length = 0; /* entirely useless */
2157 break;
2158 default:
2159 break;
2160 }
2161
2162 /* toss any non 6-byte sys-ID len PDUs */
2163 if (id_length != 6 ) {
2164 printf("bad packet -- illegal sys-ID length (%u)", id_length);
2165 return (0);
2166 }
2167
2168 pdu_type=isis_header->pdu_type;
2169
2170 /* in non-verbose mode print the basic PDU Type plus PDU specific brief information*/
2171 if (vflag < 1) {
2172 printf("%s%s",
2173 eflag ? "" : ", ",
2174 tok2str(isis_pdu_values,"unknown PDU-Type %u",pdu_type));
2175
2176 switch (pdu_type) {
2177
2178 case ISIS_PDU_L1_LAN_IIH:
2179 case ISIS_PDU_L2_LAN_IIH:
2180 printf(", src-id %s",
2181 isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN));
2182 printf(", lan-id %s, prio %u",
2183 isis_print_id(header_iih_lan->lan_id,NODE_ID_LEN),
2184 header_iih_lan->priority);
2185 break;
2186 case ISIS_PDU_PTP_IIH:
2187 printf(", src-id %s", isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN));
2188 break;
2189 case ISIS_PDU_L1_LSP:
2190 case ISIS_PDU_L2_LSP:
2191 printf(", lsp-id %s, seq 0x%08x, lifetime %5us",
2192 isis_print_id(header_lsp->lsp_id, LSP_ID_LEN),
2193 EXTRACT_32BITS(header_lsp->sequence_number),
2194 EXTRACT_16BITS(header_lsp->remaining_lifetime));
2195 break;
2196 case ISIS_PDU_L1_CSNP:
2197 case ISIS_PDU_L2_CSNP:
2198 printf(", src-id %s", isis_print_id(header_csnp->source_id,NODE_ID_LEN));
2199 break;
2200 case ISIS_PDU_L1_PSNP:
2201 case ISIS_PDU_L2_PSNP:
2202 printf(", src-id %s", isis_print_id(header_psnp->source_id,NODE_ID_LEN));
2203 break;
2204
2205 }
2206 printf(", length %u", length);
2207
2208 return(1);
2209 }
2210
2211 /* ok they seem to want to know everything - lets fully decode it */
2212 printf("%slength %u", eflag ? "" : ", ",length);
2213
2214 printf("\n\t%s, hlen: %u, v: %u, pdu-v: %u, sys-id-len: %u (%u), max-area: %u (%u)",
2215 tok2str(isis_pdu_values,
2216 "unknown, type %u",
2217 pdu_type),
2218 isis_header->fixed_len,
2219 isis_header->version,
2220 isis_header->pdu_version,
2221 id_length,
2222 isis_header->id_length,
2223 max_area,
2224 isis_header->max_area);
2225
2226 if (vflag > 1) {
2227 if(!print_unknown_data(optr,"\n\t",8)) /* provide the _o_riginal pointer */
2228 return(0); /* for optionally debugging the common header */
2229 }
2230
2231 switch (pdu_type) {
2232
2233 case ISIS_PDU_L1_LAN_IIH:
2234 case ISIS_PDU_L2_LAN_IIH:
2235 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) {
2236 printf(", bogus fixed header length %u should be %lu",
2237 isis_header->fixed_len, (unsigned long)ISIS_IIH_LAN_HEADER_SIZE);
2238 return (0);
2239 }
2240
2241 pdu_len=EXTRACT_16BITS(header_iih_lan->pdu_len);
2242 if (packet_len>pdu_len) {
2243 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2244 length=pdu_len;
2245 }
2246
2247 TCHECK(*header_iih_lan);
2248 printf("\n\t source-id: %s, holding time: %us, Flags: [%s]",
2249 isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN),
2250 EXTRACT_16BITS(header_iih_lan->holding_time),
2251 tok2str(isis_iih_circuit_type_values,
2252 "unknown circuit type 0x%02x",
2253 header_iih_lan->circuit_type));
2254
2255 printf("\n\t lan-id: %s, Priority: %u, PDU length: %u",
2256 isis_print_id(header_iih_lan->lan_id, NODE_ID_LEN),
2257 (header_iih_lan->priority) & ISIS_LAN_PRIORITY_MASK,
2258 pdu_len);
2259
2260 if (vflag > 1) {
2261 if(!print_unknown_data(pptr,"\n\t ",ISIS_IIH_LAN_HEADER_SIZE))
2262 return(0);
2263 }
2264
2265 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
2266 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
2267 break;
2268
2269 case ISIS_PDU_PTP_IIH:
2270 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) {
2271 printf(", bogus fixed header length %u should be %lu",
2272 isis_header->fixed_len, (unsigned long)ISIS_IIH_PTP_HEADER_SIZE);
2273 return (0);
2274 }
2275
2276 pdu_len=EXTRACT_16BITS(header_iih_ptp->pdu_len);
2277 if (packet_len>pdu_len) {
2278 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2279 length=pdu_len;
2280 }
2281
2282 TCHECK(*header_iih_ptp);
2283 printf("\n\t source-id: %s, holding time: %us, Flags: [%s]",
2284 isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN),
2285 EXTRACT_16BITS(header_iih_ptp->holding_time),
2286 tok2str(isis_iih_circuit_type_values,
2287 "unknown circuit type 0x%02x",
2288 header_iih_ptp->circuit_type));
2289
2290 printf("\n\t circuit-id: 0x%02x, PDU length: %u",
2291 header_iih_ptp->circuit_id,
2292 pdu_len);
2293
2294 if (vflag > 1) {
2295 if(!print_unknown_data(pptr,"\n\t ",ISIS_IIH_PTP_HEADER_SIZE))
2296 return(0);
2297 }
2298
2299 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
2300 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
2301 break;
2302
2303 case ISIS_PDU_L1_LSP:
2304 case ISIS_PDU_L2_LSP:
2305 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) {
2306 printf(", bogus fixed header length %u should be %lu",
2307 isis_header->fixed_len, (unsigned long)ISIS_LSP_HEADER_SIZE);
2308 return (0);
2309 }
2310
2311 pdu_len=EXTRACT_16BITS(header_lsp->pdu_len);
2312 if (packet_len>pdu_len) {
2313 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2314 length=pdu_len;
2315 }
2316
2317 TCHECK(*header_lsp);
2318 printf("\n\t lsp-id: %s, seq: 0x%08x, lifetime: %5us\n\t chksum: 0x%04x",
2319 isis_print_id(header_lsp->lsp_id, LSP_ID_LEN),
2320 EXTRACT_32BITS(header_lsp->sequence_number),
2321 EXTRACT_16BITS(header_lsp->remaining_lifetime),
2322 EXTRACT_16BITS(header_lsp->checksum));
2323
2324
2325 osi_print_cksum((u_int8_t *)header_lsp->lsp_id,
2326 EXTRACT_16BITS(header_lsp->checksum), 12, length-12);
2327
2328 /*
2329 * Clear checksum and lifetime prior to signature verification.
2330 */
2331 header_lsp->checksum[0] = 0;
2332 header_lsp->checksum[1] = 0;
2333 header_lsp->remaining_lifetime[0] = 0;
2334 header_lsp->remaining_lifetime[1] = 0;
2335
2336
2337 printf(", PDU length: %u, Flags: [ %s",
2338 pdu_len,
2339 ISIS_MASK_LSP_OL_BIT(header_lsp->typeblock) ? "Overload bit set, " : "");
2340
2341 if (ISIS_MASK_LSP_ATT_BITS(header_lsp->typeblock)) {
2342 printf("%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : "");
2343 printf("%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : "");
2344 printf("%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : "");
2345 printf("%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : "");
2346 printf("ATT bit set, ");
2347 }
2348 printf("%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : "");
2349 printf("%s ]", tok2str(isis_lsp_istype_values,"Unknown(0x%x)",ISIS_MASK_LSP_ISTYPE_BITS(header_lsp->typeblock)));
2350
2351 if (vflag > 1) {
2352 if(!print_unknown_data(pptr,"\n\t ",ISIS_LSP_HEADER_SIZE))
2353 return(0);
2354 }
2355
2356 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
2357 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
2358 break;
2359
2360 case ISIS_PDU_L1_CSNP:
2361 case ISIS_PDU_L2_CSNP:
2362 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) {
2363 printf(", bogus fixed header length %u should be %lu",
2364 isis_header->fixed_len, (unsigned long)ISIS_CSNP_HEADER_SIZE);
2365 return (0);
2366 }
2367
2368 pdu_len=EXTRACT_16BITS(header_csnp->pdu_len);
2369 if (packet_len>pdu_len) {
2370 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2371 length=pdu_len;
2372 }
2373
2374 TCHECK(*header_csnp);
2375 printf("\n\t source-id: %s, PDU length: %u",
2376 isis_print_id(header_csnp->source_id, NODE_ID_LEN),
2377 pdu_len);
2378 printf("\n\t start lsp-id: %s",
2379 isis_print_id(header_csnp->start_lsp_id, LSP_ID_LEN));
2380 printf("\n\t end lsp-id: %s",
2381 isis_print_id(header_csnp->end_lsp_id, LSP_ID_LEN));
2382
2383 if (vflag > 1) {
2384 if(!print_unknown_data(pptr,"\n\t ",ISIS_CSNP_HEADER_SIZE))
2385 return(0);
2386 }
2387
2388 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
2389 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
2390 break;
2391
2392 case ISIS_PDU_L1_PSNP:
2393 case ISIS_PDU_L2_PSNP:
2394 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) {
2395 printf("- bogus fixed header length %u should be %lu",
2396 isis_header->fixed_len, (unsigned long)ISIS_PSNP_HEADER_SIZE);
2397 return (0);
2398 }
2399
2400 pdu_len=EXTRACT_16BITS(header_psnp->pdu_len);
2401 if (packet_len>pdu_len) {
2402 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
2403 length=pdu_len;
2404 }
2405
2406 TCHECK(*header_psnp);
2407 printf("\n\t source-id: %s, PDU length: %u",
2408 isis_print_id(header_psnp->source_id, NODE_ID_LEN),
2409 pdu_len);
2410
2411 if (vflag > 1) {
2412 if(!print_unknown_data(pptr,"\n\t ",ISIS_PSNP_HEADER_SIZE))
2413 return(0);
2414 }
2415
2416 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
2417 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
2418 break;
2419
2420 default:
2421 if(!print_unknown_data(pptr,"\n\t ",length))
2422 return(0);
2423 return (0);
2424 }
2425
2426 /*
2427 * Now print the TLV's.
2428 */
2429
2430 while (packet_len >= 2) {
2431 if (pptr == snapend) {
2432 return (1);
2433 }
2434
2435 if (!TTEST2(*pptr, 2)) {
2436 printf("\n\t\t packet exceeded snapshot (%ld) bytes",
2437 (long)(pptr-snapend));
2438 return (1);
2439 }
2440 tlv_type = *pptr++;
2441 tlv_len = *pptr++;
2442 tmp =tlv_len; /* copy temporary len & pointer to packet data */
2443 tptr = pptr;
2444 packet_len -= 2;
2445 if (tlv_len > packet_len) {
2446 break;
2447 }
2448
2449 /* first lets see if we know the TLVs name*/
2450 printf("\n\t %s TLV #%u, length: %u",
2451 tok2str(isis_tlv_values,
2452 "unknown",
2453 tlv_type),
2454 tlv_type,
2455 tlv_len);
2456
2457 if (tlv_len == 0) /* something is malformed */
2458 continue;
2459
2460 /* now check if we have a decoder otherwise do a hexdump at the end*/
2461 switch (tlv_type) {
2462 case ISIS_TLV_AREA_ADDR:
2463 if (!TTEST2(*tptr, 1))
2464 goto trunctlv;
2465 alen = *tptr++;
2466 while (tmp && alen < tmp) {
2467 printf("\n\t Area address (length: %u): %s",
2468 alen,
2469 isonsap_string(tptr,alen));
2470 tptr += alen;
2471 tmp -= alen + 1;
2472 if (tmp==0) /* if this is the last area address do not attemt a boundary check */
2473 break;
2474 if (!TTEST2(*tptr, 1))
2475 goto trunctlv;
2476 alen = *tptr++;
2477 }
2478 break;
2479 case ISIS_TLV_ISNEIGH:
2480 while (tmp >= ETHER_ADDR_LEN) {
2481 if (!TTEST2(*tptr, ETHER_ADDR_LEN))
2482 goto trunctlv;
2483 printf("\n\t SNPA: %s",isis_print_id(tptr,ETHER_ADDR_LEN));
2484 tmp -= ETHER_ADDR_LEN;
2485 tptr += ETHER_ADDR_LEN;
2486 }
2487 break;
2488
2489 case ISIS_TLV_ISNEIGH_VARLEN:
2490 if (!TTEST2(*tptr, 1) || tmp < 3) /* min. TLV length */
2491 goto trunctlv;
2492 lan_alen = *tptr++; /* LAN address length */
2493 if (lan_alen == 0) {
2494 printf("\n\t LAN address length 0 bytes (invalid)");
2495 break;
2496 }
2497 tmp --;
2498 printf("\n\t LAN address length %u bytes ",lan_alen);
2499 while (tmp >= lan_alen) {
2500 if (!TTEST2(*tptr, lan_alen))
2501 goto trunctlv;
2502 printf("\n\t\tIS Neighbor: %s",isis_print_id(tptr,lan_alen));
2503 tmp -= lan_alen;
2504 tptr +=lan_alen;
2505 }
2506 break;
2507
2508 case ISIS_TLV_PADDING:
2509 break;
2510
2511 case ISIS_TLV_MT_IS_REACH:
2512 mt_len = isis_print_mtid(tptr, "\n\t ");
2513 if (mt_len == 0) /* did something go wrong ? */
2514 goto trunctlv;
2515 tptr+=mt_len;
2516 tmp-=mt_len;
2517 while (tmp >= 2+NODE_ID_LEN+3+1) {
2518 ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type);
2519 if (ext_is_len == 0) /* did something go wrong ? */
2520 goto trunctlv;
2521
2522 tmp-=ext_is_len;
2523 tptr+=ext_is_len;
2524 }
2525 break;
2526
2527 case ISIS_TLV_IS_ALIAS_ID:
2528 while (tmp >= NODE_ID_LEN+1) { /* is it worth attempting a decode ? */
2529 ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type);
2530 if (ext_is_len == 0) /* did something go wrong ? */
2531 goto trunctlv;
2532 tmp-=ext_is_len;
2533 tptr+=ext_is_len;
2534 }
2535 break;
2536
2537 case ISIS_TLV_EXT_IS_REACH:
2538 while (tmp >= NODE_ID_LEN+3+1) { /* is it worth attempting a decode ? */
2539 ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type);
2540 if (ext_is_len == 0) /* did something go wrong ? */
2541 goto trunctlv;
2542 tmp-=ext_is_len;
2543 tptr+=ext_is_len;
2544 }
2545 break;
2546 case ISIS_TLV_IS_REACH:
2547 if (!TTEST2(*tptr,1)) /* check if there is one byte left to read out the virtual flag */
2548 goto trunctlv;
2549 printf("\n\t %s",
2550 tok2str(isis_is_reach_virtual_values,
2551 "bogus virtual flag 0x%02x",
2552 *tptr++));
2553 tlv_is_reach = (const struct isis_tlv_is_reach *)tptr;
2554 while (tmp >= sizeof(struct isis_tlv_is_reach)) {
2555 if (!TTEST(*tlv_is_reach))
2556 goto trunctlv;
2557 printf("\n\t IS Neighbor: %s",
2558 isis_print_id(tlv_is_reach->neighbor_nodeid, NODE_ID_LEN));
2559 isis_print_metric_block(&tlv_is_reach->isis_metric_block);
2560 tmp -= sizeof(struct isis_tlv_is_reach);
2561 tlv_is_reach++;
2562 }
2563 break;
2564
2565 case ISIS_TLV_ESNEIGH:
2566 tlv_es_reach = (const struct isis_tlv_es_reach *)tptr;
2567 while (tmp >= sizeof(struct isis_tlv_es_reach)) {
2568 if (!TTEST(*tlv_es_reach))
2569 goto trunctlv;
2570 printf("\n\t ES Neighbor: %s",
2571 isis_print_id(tlv_es_reach->neighbor_sysid,SYSTEM_ID_LEN));
2572 isis_print_metric_block(&tlv_es_reach->isis_metric_block);
2573 tmp -= sizeof(struct isis_tlv_es_reach);
2574 tlv_es_reach++;
2575 }
2576 break;
2577
2578 /* those two TLVs share the same format */
2579 case ISIS_TLV_INT_IP_REACH:
2580 case ISIS_TLV_EXT_IP_REACH:
2581 if (!isis_print_tlv_ip_reach(pptr, "\n\t ", tlv_len))
2582 return (1);
2583 break;
2584
2585 case ISIS_TLV_EXTD_IP_REACH:
2586 while (tmp>0) {
2587 ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", AF_INET);
2588 if (ext_ip_len == 0) /* did something go wrong ? */
2589 goto trunctlv;
2590 tptr+=ext_ip_len;
2591 tmp-=ext_ip_len;
2592 }
2593 break;
2594
2595 case ISIS_TLV_MT_IP_REACH:
2596 mt_len = isis_print_mtid(tptr, "\n\t ");
2597 if (mt_len == 0) { /* did something go wrong ? */
2598 goto trunctlv;
2599 }
2600 tptr+=mt_len;
2601 tmp-=mt_len;
2602
2603 while (tmp>0) {
2604 ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", AF_INET);
2605 if (ext_ip_len == 0) /* did something go wrong ? */
2606 goto trunctlv;
2607 tptr+=ext_ip_len;
2608 tmp-=ext_ip_len;
2609 }
2610 break;
2611
2612 #ifdef INET6
2613 case ISIS_TLV_IP6_REACH:
2614 while (tmp>0) {
2615 ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", AF_INET6);
2616 if (ext_ip_len == 0) /* did something go wrong ? */
2617 goto trunctlv;
2618 tptr+=ext_ip_len;
2619 tmp-=ext_ip_len;
2620 }
2621 break;
2622
2623 case ISIS_TLV_MT_IP6_REACH:
2624 mt_len = isis_print_mtid(tptr, "\n\t ");
2625 if (mt_len == 0) { /* did something go wrong ? */
2626 goto trunctlv;
2627 }
2628 tptr+=mt_len;
2629 tmp-=mt_len;
2630
2631 while (tmp>0) {
2632 ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", AF_INET6);
2633 if (ext_ip_len == 0) /* did something go wrong ? */
2634 goto trunctlv;
2635 tptr+=ext_ip_len;
2636 tmp-=ext_ip_len;
2637 }
2638 break;
2639
2640 case ISIS_TLV_IP6ADDR:
2641 while (tmp>=sizeof(struct in6_addr)) {
2642 if (!TTEST2(*tptr, sizeof(struct in6_addr)))
2643 goto trunctlv;
2644
2645 printf("\n\t IPv6 interface address: %s",
2646 ip6addr_string(tptr));
2647
2648 tptr += sizeof(struct in6_addr);
2649 tmp -= sizeof(struct in6_addr);
2650 }
2651 break;
2652 #endif
2653 case ISIS_TLV_AUTH:
2654 if (!TTEST2(*tptr, 1))
2655 goto trunctlv;
2656
2657 printf("\n\t %s: ",
2658 tok2str(isis_subtlv_auth_values,
2659 "unknown Authentication type 0x%02x",
2660 *tptr));
2661
2662 switch (*tptr) {
2663 case ISIS_SUBTLV_AUTH_SIMPLE:
2664 for(i=1;i<tlv_len;i++) {
2665 if (!TTEST2(*(tptr+i), 1))
2666 goto trunctlv;
2667 printf("%c",*(tptr+i));
2668 }
2669 break;
2670 case ISIS_SUBTLV_AUTH_MD5:
2671 for(i=1;i<tlv_len;i++) {
2672 if (!TTEST2(*(tptr+i), 1))
2673 goto trunctlv;
2674 printf("%02x",*(tptr+i));
2675 }
2676 if (tlv_len != ISIS_SUBTLV_AUTH_MD5_LEN+1)
2677 printf(", (malformed subTLV) ");
2678
2679 #ifdef HAVE_LIBCRYPTO
2680 sigcheck = signature_verify(optr, length,
2681 (unsigned char *)tptr + 1);
2682 #else
2683 sigcheck = CANT_CHECK_SIGNATURE;
2684 #endif
2685 printf(" (%s)", tok2str(signature_check_values, "Unknown", sigcheck));
2686
2687 break;
2688 case ISIS_SUBTLV_AUTH_GENERIC:
2689 key_id = EXTRACT_16BITS((tptr+1));
2690 printf("%u, password: ", key_id);
2691 for(i=1 + sizeof(u_int16_t);i<tlv_len;i++) {
2692 if (!TTEST2(*(tptr+i), 1))
2693 goto trunctlv;
2694 printf("%02x",*(tptr+i));
2695 }
2696 break;
2697 case ISIS_SUBTLV_AUTH_PRIVATE:
2698 default:
2699 if(!print_unknown_data(tptr+1,"\n\t\t ",tlv_len-1))
2700 return(0);
2701 break;
2702 }
2703 break;
2704
2705 case ISIS_TLV_PTP_ADJ:
2706 tlv_ptp_adj = (const struct isis_tlv_ptp_adj *)tptr;
2707 if(tmp>=1) {
2708 if (!TTEST2(*tptr, 1))
2709 goto trunctlv;
2710 printf("\n\t Adjacency State: %s (%u)",
2711 tok2str(isis_ptp_adjancey_values, "unknown", *tptr),
2712 *tptr);
2713 tmp--;
2714 }
2715 if(tmp>sizeof(tlv_ptp_adj->extd_local_circuit_id)) {
2716 if (!TTEST2(tlv_ptp_adj->extd_local_circuit_id,
2717 sizeof(tlv_ptp_adj->extd_local_circuit_id)))
2718 goto trunctlv;
2719 printf("\n\t Extended Local circuit-ID: 0x%08x",
2720 EXTRACT_32BITS(tlv_ptp_adj->extd_local_circuit_id));
2721 tmp-=sizeof(tlv_ptp_adj->extd_local_circuit_id);
2722 }
2723 if(tmp>=SYSTEM_ID_LEN) {
2724 if (!TTEST2(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN))
2725 goto trunctlv;
2726 printf("\n\t Neighbor System-ID: %s",
2727 isis_print_id(tlv_ptp_adj->neighbor_sysid,SYSTEM_ID_LEN));
2728 tmp-=SYSTEM_ID_LEN;
2729 }
2730 if(tmp>=sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)) {
2731 if (!TTEST2(tlv_ptp_adj->neighbor_extd_local_circuit_id,
2732 sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)))
2733 goto trunctlv;
2734 printf("\n\t Neighbor Extended Local circuit-ID: 0x%08x",
2735 EXTRACT_32BITS(tlv_ptp_adj->neighbor_extd_local_circuit_id));
2736 }
2737 break;
2738
2739 case ISIS_TLV_PROTOCOLS:
2740 printf("\n\t NLPID(s): ");
2741 while (tmp>0) {
2742 if (!TTEST2(*(tptr), 1))
2743 goto trunctlv;
2744 printf("%s (0x%02x)",
2745 tok2str(nlpid_values,
2746 "unknown",
2747 *tptr),
2748 *tptr);
2749 if (tmp>1) /* further NPLIDs ? - put comma */
2750 printf(", ");
2751 tptr++;
2752 tmp--;
2753 }
2754 break;
2755
2756 case ISIS_TLV_MT_PORT_CAP:
2757
2758 if (!TTEST2(*(tptr), 2))
2759 goto trunctlv;
2760
2761 printf("\n\t RES: %d, MTID(s): %d",
2762 (EXTRACT_16BITS (tptr) >> 12),
2763 (EXTRACT_16BITS (tptr) & 0x0fff));
2764
2765 tmp = tmp-2;
2766 tptr = tptr+2;
2767
2768 if (tmp)
2769 isis_print_mt_port_cap_subtlv (tptr, tmp);
2770 break;
2771
2772 case ISIS_TLV_MT_CAPABILITY:
2773
2774 if (!TTEST2(*(tptr), 2))
2775 goto trunctlv;
2776
2777 printf("\n\t O: %d, RES: %d, MTID(s): %d",
2778 (EXTRACT_16BITS(tptr) >> 15) & 0x01,
2779 (EXTRACT_16BITS(tptr) >> 12) & 0x07,
2780 EXTRACT_16BITS(tptr) & 0x0fff);
2781
2782 tmp = tmp-2;
2783 tptr = tptr+2;
2784
2785 if (tmp)
2786 isis_print_mt_capability_subtlv (tptr, tmp);
2787
2788 break;
2789
2790 case ISIS_TLV_TE_ROUTER_ID:
2791 if (!TTEST2(*pptr, sizeof(struct in_addr)))
2792 goto trunctlv;
2793 printf("\n\t Traffic Engineering Router ID: %s", ipaddr_string(pptr));
2794 break;
2795
2796 case ISIS_TLV_IPADDR:
2797 while (tmp>=sizeof(struct in_addr)) {
2798 if (!TTEST2(*tptr, sizeof(struct in_addr)))
2799 goto trunctlv;
2800 printf("\n\t IPv4 interface address: %s", ipaddr_string(tptr));
2801 tptr += sizeof(struct in_addr);
2802 tmp -= sizeof(struct in_addr);
2803 }
2804 break;
2805
2806 case ISIS_TLV_HOSTNAME:
2807 printf("\n\t Hostname: ");
2808 while (tmp>0) {
2809 if (!TTEST2(*tptr, 1))
2810 goto trunctlv;
2811 printf("%c",*tptr++);
2812 tmp--;
2813 }
2814 break;
2815
2816 case ISIS_TLV_SHARED_RISK_GROUP:
2817 if (tmp < NODE_ID_LEN)
2818 break;
2819 if (!TTEST2(*tptr, NODE_ID_LEN))
2820 goto trunctlv;
2821 printf("\n\t IS Neighbor: %s", isis_print_id(tptr, NODE_ID_LEN));
2822 tptr+=(NODE_ID_LEN);
2823 tmp-=(NODE_ID_LEN);
2824
2825 if (tmp < 1)
2826 break;
2827 if (!TTEST2(*tptr, 1))
2828 goto trunctlv;
2829 printf(", Flags: [%s]", ISIS_MASK_TLV_SHARED_RISK_GROUP(*tptr++) ? "numbered" : "unnumbered");
2830 tmp--;
2831
2832 if (tmp < sizeof(struct in_addr))
2833 break;
2834 if (!TTEST2(*tptr,sizeof(struct in_addr)))
2835 goto trunctlv;
2836 printf("\n\t IPv4 interface address: %s", ipaddr_string(tptr));
2837 tptr+=sizeof(struct in_addr);
2838 tmp-=sizeof(struct in_addr);
2839
2840 if (tmp < sizeof(struct in_addr))
2841 break;
2842 if (!TTEST2(*tptr,sizeof(struct in_addr)))
2843 goto trunctlv;
2844 printf("\n\t IPv4 neighbor address: %s", ipaddr_string(tptr));
2845 tptr+=sizeof(struct in_addr);
2846 tmp-=sizeof(struct in_addr);
2847
2848 while (tmp>=4) {
2849 if (!TTEST2(*tptr, 4))
2850 goto trunctlv;
2851 printf("\n\t Link-ID: 0x%08x", EXTRACT_32BITS(tptr));
2852 tptr+=4;
2853 tmp-=4;
2854 }
2855 break;
2856
2857 case ISIS_TLV_LSP:
2858 tlv_lsp = (const struct isis_tlv_lsp *)tptr;
2859 while(tmp>=sizeof(struct isis_tlv_lsp)) {
2860 if (!TTEST((tlv_lsp->lsp_id)[LSP_ID_LEN-1]))
2861 goto trunctlv;
2862 printf("\n\t lsp-id: %s",
2863 isis_print_id(tlv_lsp->lsp_id, LSP_ID_LEN));
2864 if (!TTEST2(tlv_lsp->sequence_number, 4))
2865 goto trunctlv;
2866 printf(", seq: 0x%08x",EXTRACT_32BITS(tlv_lsp->sequence_number));
2867 if (!TTEST2(tlv_lsp->remaining_lifetime, 2))
2868 goto trunctlv;
2869 printf(", lifetime: %5ds",EXTRACT_16BITS(tlv_lsp->remaining_lifetime));
2870 if (!TTEST2(tlv_lsp->checksum, 2))
2871 goto trunctlv;
2872 printf(", chksum: 0x%04x",EXTRACT_16BITS(tlv_lsp->checksum));
2873 tmp-=sizeof(struct isis_tlv_lsp);
2874 tlv_lsp++;
2875 }
2876 break;
2877
2878 case ISIS_TLV_CHECKSUM:
2879 if (tmp < ISIS_TLV_CHECKSUM_MINLEN)
2880 break;
2881 if (!TTEST2(*tptr, ISIS_TLV_CHECKSUM_MINLEN))
2882 goto trunctlv;
2883 printf("\n\t checksum: 0x%04x ", EXTRACT_16BITS(tptr));
2884 /* do not attempt to verify the checksum if it is zero
2885 * most likely a HMAC-MD5 TLV is also present and
2886 * to avoid conflicts the checksum TLV is zeroed.
2887 * see rfc3358 for details
2888 */
2889 osi_print_cksum(optr, EXTRACT_16BITS(tptr), tptr-optr, length);
2890 break;
2891
2892 case ISIS_TLV_MT_SUPPORTED:
2893 if (tmp < ISIS_TLV_MT_SUPPORTED_MINLEN)
2894 break;
2895 while (tmp>1) {
2896 /* length can only be a multiple of 2, otherwise there is
2897 something broken -> so decode down until length is 1 */
2898 if (tmp!=1) {
2899 mt_len = isis_print_mtid(tptr, "\n\t ");
2900 if (mt_len == 0) /* did something go wrong ? */
2901 goto trunctlv;
2902 tptr+=mt_len;
2903 tmp-=mt_len;
2904 } else {
2905 printf("\n\t malformed MT-ID");
2906 break;
2907 }
2908 }
2909 break;
2910
2911 case ISIS_TLV_RESTART_SIGNALING:
2912 /* first attempt to decode the flags */
2913 if (tmp < ISIS_TLV_RESTART_SIGNALING_FLAGLEN)
2914 break;
2915 if (!TTEST2(*tptr, ISIS_TLV_RESTART_SIGNALING_FLAGLEN))
2916 goto trunctlv;
2917 printf("\n\t Flags [%s]",
2918 bittok2str(isis_restart_flag_values, "none", *tptr));
2919 tptr+=ISIS_TLV_RESTART_SIGNALING_FLAGLEN;
2920 tmp-=ISIS_TLV_RESTART_SIGNALING_FLAGLEN;
2921
2922 /* is there anything other than the flags field? */
2923 if (tmp == 0)
2924 break;
2925
2926 if (tmp < ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN)
2927 break;
2928 if (!TTEST2(*tptr, ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN))
2929 goto trunctlv;
2930
2931 printf(", Remaining holding time %us", EXTRACT_16BITS(tptr));
2932 tptr+=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN;
2933 tmp-=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN;
2934
2935 /* is there an additional sysid field present ?*/
2936 if (tmp == SYSTEM_ID_LEN) {
2937 if (!TTEST2(*tptr, SYSTEM_ID_LEN))
2938 goto trunctlv;
2939 printf(", for %s",isis_print_id(tptr,SYSTEM_ID_LEN));
2940 }
2941 break;
2942
2943 case ISIS_TLV_IDRP_INFO:
2944 if (tmp < ISIS_TLV_IDRP_INFO_MINLEN)
2945 break;
2946 if (!TTEST2(*tptr, ISIS_TLV_IDRP_INFO_MINLEN))
2947 goto trunctlv;
2948 printf("\n\t Inter-Domain Information Type: %s",
2949 tok2str(isis_subtlv_idrp_values,
2950 "Unknown (0x%02x)",
2951 *tptr));
2952 switch (*tptr++) {
2953 case ISIS_SUBTLV_IDRP_ASN:
2954 if (!TTEST2(*tptr, 2)) /* fetch AS number */
2955 goto trunctlv;
2956 printf("AS Number: %u",EXTRACT_16BITS(tptr));
2957 break;
2958 case ISIS_SUBTLV_IDRP_LOCAL:
2959 case ISIS_SUBTLV_IDRP_RES:
2960 default:
2961 if(!print_unknown_data(tptr,"\n\t ",tlv_len-1))
2962 return(0);
2963 break;
2964 }
2965 break;
2966
2967 case ISIS_TLV_LSP_BUFFERSIZE:
2968 if (tmp < ISIS_TLV_LSP_BUFFERSIZE_MINLEN)
2969 break;
2970 if (!TTEST2(*tptr, ISIS_TLV_LSP_BUFFERSIZE_MINLEN))
2971 goto trunctlv;
2972 printf("\n\t LSP Buffersize: %u",EXTRACT_16BITS(tptr));
2973 break;
2974
2975 case ISIS_TLV_PART_DIS:
2976 while (tmp >= SYSTEM_ID_LEN) {
2977 if (!TTEST2(*tptr, SYSTEM_ID_LEN))
2978 goto trunctlv;
2979 printf("\n\t %s",isis_print_id(tptr,SYSTEM_ID_LEN));
2980 tptr+=SYSTEM_ID_LEN;
2981 tmp-=SYSTEM_ID_LEN;
2982 }
2983 break;
2984
2985 case ISIS_TLV_PREFIX_NEIGH:
2986 if (tmp < sizeof(struct isis_metric_block))
2987 break;
2988 if (!TTEST2(*tptr, sizeof(struct isis_metric_block)))
2989 goto trunctlv;
2990 printf("\n\t Metric Block");
2991 isis_print_metric_block((const struct isis_metric_block *)tptr);
2992 tptr+=sizeof(struct isis_metric_block);
2993 tmp-=sizeof(struct isis_metric_block);
2994
2995 while(tmp>0) {
2996 if (!TTEST2(*tptr, 1))
2997 goto trunctlv;
2998 prefix_len=*tptr++; /* read out prefix length in semioctets*/
2999 if (prefix_len < 2) {
3000 printf("\n\t\tAddress: prefix length %u < 2", prefix_len);
3001 break;
3002 }
3003 tmp--;
3004 if (tmp < prefix_len/2)
3005 break;
3006 if (!TTEST2(*tptr, prefix_len/2))
3007 goto trunctlv;
3008 printf("\n\t\tAddress: %s/%u",
3009 isonsap_string(tptr,prefix_len/2),
3010 prefix_len*4);
3011 tptr+=prefix_len/2;
3012 tmp-=prefix_len/2;
3013 }
3014 break;
3015
3016 case ISIS_TLV_IIH_SEQNR:
3017 if (tmp < ISIS_TLV_IIH_SEQNR_MINLEN)
3018 break;
3019 if (!TTEST2(*tptr, ISIS_TLV_IIH_SEQNR_MINLEN)) /* check if four bytes are on the wire */
3020 goto trunctlv;
3021 printf("\n\t Sequence number: %u", EXTRACT_32BITS(tptr) );
3022 break;
3023
3024 case ISIS_TLV_VENDOR_PRIVATE:
3025 if (tmp < ISIS_TLV_VENDOR_PRIVATE_MINLEN)
3026 break;
3027 if (!TTEST2(*tptr, ISIS_TLV_VENDOR_PRIVATE_MINLEN)) /* check if enough byte for a full oui */
3028 goto trunctlv;
3029 vendor_id = EXTRACT_24BITS(tptr);
3030 printf("\n\t Vendor: %s (%u)",
3031 tok2str(oui_values,"Unknown",vendor_id),
3032 vendor_id);
3033 tptr+=3;
3034 tmp-=3;
3035 if (tmp > 0) /* hexdump the rest */
3036 if(!print_unknown_data(tptr,"\n\t\t",tmp))
3037 return(0);
3038 break;
3039 /*
3040 * FIXME those are the defined TLVs that lack a decoder
3041 * you are welcome to contribute code ;-)
3042 */
3043
3044 case ISIS_TLV_DECNET_PHASE4:
3045 case ISIS_TLV_LUCENT_PRIVATE:
3046 case ISIS_TLV_IPAUTH:
3047 case ISIS_TLV_NORTEL_PRIVATE1:
3048 case ISIS_TLV_NORTEL_PRIVATE2:
3049
3050 default:
3051 if (vflag <= 1) {
3052 if(!print_unknown_data(pptr,"\n\t\t",tlv_len))
3053 return(0);
3054 }
3055 break;
3056 }
3057 /* do we want to see an additionally hexdump ? */
3058 if (vflag> 1) {
3059 if(!print_unknown_data(pptr,"\n\t ",tlv_len))
3060 return(0);
3061 }
3062
3063 pptr += tlv_len;
3064 packet_len -= tlv_len;
3065 }
3066
3067 if (packet_len != 0) {
3068 printf("\n\t %u straggler bytes", packet_len);
3069 }
3070 return (1);
3071
3072 trunc:
3073 fputs("[|isis]", stdout);
3074 return (1);
3075
3076 trunctlv:
3077 printf("\n\t\t packet exceeded snapshot");
3078 return(1);
3079 }
3080
3081 static void
3082 osi_print_cksum (const u_int8_t *pptr, u_int16_t checksum,
3083 u_int checksum_offset, u_int length)
3084 {
3085 u_int16_t calculated_checksum;
3086
3087 /* do not attempt to verify the checksum if it is zero */
3088 if (!checksum) {
3089 printf("(unverified)");
3090 } else {
3091 calculated_checksum = create_osi_cksum(pptr, checksum_offset, length);
3092 if (checksum == calculated_checksum) {
3093 printf(" (correct)");
3094 } else {
3095 printf(" (incorrect should be 0x%04x)", calculated_checksum);
3096 }
3097 }
3098 }
3099
3100 /*
3101 * Local Variables:
3102 * c-style: whitesmith
3103 * c-basic-offset: 8
3104 * End:
3105 */
[mirror] the TCPdump network dissector