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update some references to internet drafts and change subTLV 4 to reflect the changes...
[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 support.
25 */
26
27 #ifndef lint
28 static const char rcsid[] =
29 "@(#) $Header: /tcpdump/master/tcpdump/print-isoclns.c,v 1.96 2003-09-08 16:18:06 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 "extract.h"
46 #include "gmpls.h"
47
48 #define NLPID_CLNS 129 /* 0x81 */
49 #define NLPID_ESIS 130 /* 0x82 */
50 #define NLPID_ISIS 131 /* 0x83 */
51 #define NLPID_IP6 0x8e
52 #define NLPID_IP 0xcc
53 #define NLPID_NULLNS 0
54
55 #define IPV4 1 /* AFI value */
56 #define IPV6 2 /* AFI value */
57
58 /*
59 * IS-IS is defined in ISO 10589. Look there for protocol definitions.
60 */
61
62 #define SYSTEM_ID_LEN ETHER_ADDR_LEN
63 #define NODE_ID_LEN SYSTEM_ID_LEN+1
64 #define LSP_ID_LEN SYSTEM_ID_LEN+2
65
66 #define ISIS_VERSION 1
67 #define PDU_TYPE_MASK 0x1F
68 #define PRIORITY_MASK 0x7F
69
70 #define L1_LAN_IIH 15
71 #define L2_LAN_IIH 16
72 #define PTP_IIH 17
73 #define L1_LSP 18
74 #define L2_LSP 20
75 #define L1_CSNP 24
76 #define L2_CSNP 25
77 #define L1_PSNP 26
78 #define L2_PSNP 27
79
80 static struct tok isis_pdu_values[] = {
81 { L1_LAN_IIH, "L1 Lan IIH"},
82 { L2_LAN_IIH, "L2 Lan IIH"},
83 { PTP_IIH, "p2p IIH"},
84 { L1_LSP, "L1 LSP"},
85 { L2_LSP, "L2 LSP"},
86 { L1_CSNP, "L1 CSNP"},
87 { L2_CSNP, "L2 CSNP"},
88 { L1_PSNP, "L1 PSNP"},
89 { L2_PSNP, "L2 PSNP"},
90 { 0, NULL}
91 };
92
93 /*
94 * A TLV is a tuple of a type, length and a value and is normally used for
95 * encoding information in all sorts of places. This is an enumeration of
96 * the well known types.
97 *
98 * list taken from rfc3359 plus some memory from veterans ;-)
99 */
100
101 #define TLV_AREA_ADDR 1 /* iso10589 */
102 #define TLV_IS_REACH 2 /* iso10589 */
103 #define TLV_ESNEIGH 3 /* iso10589 */
104 #define TLV_PART_DIS 4 /* iso10589 */
105 #define TLV_PREFIX_NEIGH 5 /* iso10589 */
106 #define TLV_ISNEIGH 6 /* iso10589 */
107 #define TLV_ISNEIGH_VARLEN 7 /* iso10589 */
108 #define TLV_PADDING 8 /* iso10589 */
109 #define TLV_LSP 9 /* iso10589 */
110 #define TLV_AUTH 10 /* iso10589, rfc3567 */
111 #define TLV_CHECKSUM 12 /* rfc3358 */
112 #define TLV_LSP_BUFFERSIZE 14 /* iso10589 rev2 */
113 #define TLV_EXT_IS_REACH 22 /* draft-ietf-isis-traffic-05 */
114 #define TLV_IS_ALIAS_ID 24 /* draft-ietf-isis-ext-lsp-frags-02 */
115 #define TLV_DECNET_PHASE4 42
116 #define TLV_LUCENT_PRIVATE 66
117 #define TLV_IP_REACH 128 /* rfc1195, rfc2966 */
118 #define TLV_PROTOCOLS 129 /* rfc1195 */
119 #define TLV_IP_REACH_EXT 130 /* rfc1195, rfc2966 */
120 #define TLV_IDRP_INFO 131 /* rfc1195 */
121 #define TLV_IPADDR 132 /* rfc1195 */
122 #define TLV_IPAUTH 133 /* rfc1195 */
123 #define TLV_TE_ROUTER_ID 134 /* draft-ietf-isis-traffic-05 */
124 #define TLV_EXT_IP_REACH 135 /* draft-ietf-isis-traffic-05 */
125 #define TLV_HOSTNAME 137 /* rfc2763 */
126 #define TLV_SHARED_RISK_GROUP 138 /* draft-ietf-isis-gmpls-extensions */
127 #define TLV_NORTEL_PRIVATE1 176
128 #define TLV_NORTEL_PRIVATE2 177
129 #define TLV_HOLDTIME 198 /* ES-IS */
130 #define TLV_RESTART_SIGNALING 211 /* draft-ietf-isis-restart-01 */
131 #define TLV_MT_IS_REACH 222 /* draft-ietf-isis-wg-multi-topology-05 */
132 #define TLV_MT_SUPPORTED 229 /* draft-ietf-isis-wg-multi-topology-05 */
133 #define TLV_IP6ADDR 232 /* draft-ietf-isis-ipv6-02 */
134 #define TLV_MT_IP_REACH 235 /* draft-ietf-isis-wg-multi-topology-05 */
135 #define TLV_IP6_REACH 236 /* draft-ietf-isis-ipv6-02 */
136 #define TLV_MT_IP6_REACH 237 /* draft-ietf-isis-wg-multi-topology-05 */
137 #define TLV_PTP_ADJ 240 /* rfc3373 */
138 #define TLV_IIH_SEQNR 241 /* draft-shen-isis-iih-sequence-00 */
139 #define TLV_VENDOR_PRIVATE 250 /* draft-ietf-isis-proprietary-tlv-00 */
140
141 static struct tok isis_tlv_values[] = {
142 { TLV_AREA_ADDR, "Area address(es)"},
143 { TLV_IS_REACH, "IS Reachability"},
144 { TLV_ESNEIGH, "ES Neighbor(s)"},
145 { TLV_PART_DIS, "Partition DIS"},
146 { TLV_PREFIX_NEIGH, "Prefix Neighbors"},
147 { TLV_ISNEIGH, "IS Neighbor(s)"},
148 { TLV_ISNEIGH_VARLEN, "IS Neighbor(s) (variable length)"},
149 { TLV_PADDING, "Padding"},
150 { TLV_LSP, "LSP entries"},
151 { TLV_AUTH, "Authentication"},
152 { TLV_CHECKSUM, "Checksum"},
153 { TLV_LSP_BUFFERSIZE, "LSP Buffersize"},
154 { TLV_EXT_IS_REACH, "Extended IS Reachability"},
155 { TLV_IS_ALIAS_ID, "IS Alias ID"},
156 { TLV_DECNET_PHASE4, "DECnet Phase IV"},
157 { TLV_LUCENT_PRIVATE, "Lucent Proprietary"},
158 { TLV_IP_REACH, "IPv4 Internal reachability"},
159 { TLV_PROTOCOLS, "Protocols supported"},
160 { TLV_IP_REACH_EXT, "IPv4 External reachability"},
161 { TLV_IDRP_INFO, "Inter-Domain Information Type"},
162 { TLV_IPADDR, "IPv4 Interface address(es)"},
163 { TLV_IPAUTH, "IPv4 authentication (deprecated)"},
164 { TLV_TE_ROUTER_ID, "Traffic Engineering Router ID"},
165 { TLV_EXT_IP_REACH, "Extended IPv4 reachability"},
166 { TLV_HOSTNAME, "Hostname"},
167 { TLV_SHARED_RISK_GROUP, "Shared Risk Link Group"},
168 { TLV_NORTEL_PRIVATE1, "Nortel Proprietary"},
169 { TLV_NORTEL_PRIVATE2, "Nortel Proprietary"},
170 { TLV_HOLDTIME, "Holdtime"},
171 { TLV_RESTART_SIGNALING, "Restart Signaling"},
172 { TLV_MT_IS_REACH, "Multi Topology IS Reachability"},
173 { TLV_MT_SUPPORTED, "Multi Topology"},
174 { TLV_IP6ADDR, "IPv6 Interface address(es)"},
175 { TLV_MT_IP_REACH, "Multi-Topology IPv4 reachability"},
176 { TLV_IP6_REACH, "IPv6 reachability"},
177 { TLV_MT_IP6_REACH, "Multi-Topology IP6 reachability"},
178 { TLV_PTP_ADJ, "Point-to-point Adjacency State"},
179 { TLV_IIH_SEQNR, "Hello PDU Sequence Number"},
180 { TLV_VENDOR_PRIVATE, "Vendor Private"},
181 { 0, NULL }
182 };
183
184 #define SUBTLV_EXT_IS_REACH_ADMIN_GROUP 3 /* draft-ietf-isis-traffic-05 */
185 #define SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID 4 /* draft-ietf-isis-gmpls-extensions */
186 #define SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID 5 /* draft-ietf-isis-traffic-05 */
187 #define SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR 6 /* draft-ietf-isis-traffic-05 */
188 #define SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR 8 /* draft-ietf-isis-traffic-05 */
189 #define SUBTLV_EXT_IS_REACH_MAX_LINK_BW 9 /* draft-ietf-isis-traffic-05 */
190 #define SUBTLV_EXT_IS_REACH_RESERVABLE_BW 10 /* draft-ietf-isis-traffic-05 */
191 #define SUBTLV_EXT_IS_REACH_UNRESERVED_BW 11 /* draft-ietf-isis-traffic-05 */
192 #define SUBTLV_EXT_IS_REACH_TE_METRIC 18 /* draft-ietf-isis-traffic-05 */
193 #define SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE 20 /* draft-ietf-isis-gmpls-extensions */
194 #define SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR 21 /* draft-ietf-isis-gmpls-extensions */
195
196 static struct tok isis_ext_is_reach_subtlv_values[] = {
197 { SUBTLV_EXT_IS_REACH_ADMIN_GROUP, "Administrative groups" },
198 { SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" },
199 { SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID, "Link Remote Identifier" },
200 { SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR, "IPv4 interface address" },
201 { SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR, "IPv4 neighbor address" },
202 { SUBTLV_EXT_IS_REACH_MAX_LINK_BW, "Maximum link bandwidth" },
203 { SUBTLV_EXT_IS_REACH_RESERVABLE_BW, "Reservable link bandwidth" },
204 { SUBTLV_EXT_IS_REACH_UNRESERVED_BW, "Unreserved bandwidth" },
205 { SUBTLV_EXT_IS_REACH_TE_METRIC, "Traffic Engineering Metric" },
206 { SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE, "Link Protection Type" },
207 { SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR, "Interface Switching Capability" },
208 { 250, "Reserved for cisco specific extensions" },
209 { 251, "Reserved for cisco specific extensions" },
210 { 252, "Reserved for cisco specific extensions" },
211 { 253, "Reserved for cisco specific extensions" },
212 { 254, "Reserved for cisco specific extensions" },
213 { 255, "Reserved for future expansion" },
214 { 0, NULL }
215 };
216
217 #define SUBTLV_IP_REACH_ADMIN_TAG32 1
218 #define SUBTLV_IP_REACH_ADMIN_TAG64 2
219
220 static struct tok isis_ext_ip_reach_subtlv_values[] = {
221 { SUBTLV_IP_REACH_ADMIN_TAG32, "32-Bit Administrative tag" },
222 { SUBTLV_IP_REACH_ADMIN_TAG64, "64-Bit Administrative tag" },
223 { 0, NULL }
224 };
225
226 #define SUBTLV_AUTH_SIMPLE 1
227 #define SUBTLV_AUTH_MD5 54
228 #define SUBTLV_AUTH_MD5_LEN 16
229 #define SUBTLV_AUTH_PRIVATE 255
230
231 static struct tok isis_subtlv_auth_values[] = {
232 { SUBTLV_AUTH_SIMPLE, "simple text password"},
233 { SUBTLV_AUTH_MD5, "HMAC-MD5 password"},
234 { SUBTLV_AUTH_PRIVATE, "Routing Domain private password"},
235 { 0, NULL }
236 };
237
238 #define SUBTLV_IDRP_RES 0
239 #define SUBTLV_IDRP_LOCAL 1
240 #define SUBTLV_IDRP_ASN 2
241
242 static struct tok isis_subtlv_idrp_values[] = {
243 { SUBTLV_IDRP_RES, "Reserved"},
244 { SUBTLV_IDRP_LOCAL, "Routing-Domain Specific"},
245 { SUBTLV_IDRP_ASN, "AS Number Tag"},
246 { 0, NULL}
247 };
248
249 #define ISIS_8BIT_MASK(x) ((x)&0xff)
250
251 #define ISIS_MASK_LSP_OL_BIT(x) ((x)&0x4)
252 #define ISIS_MASK_LSP_ISTYPE_BITS(x) ((x)&0x3)
253 #define ISIS_MASK_LSP_PARTITION_BIT(x) ((x)&0x80)
254 #define ISIS_MASK_LSP_ATT_BITS(x) ((x)&0x78)
255 #define ISIS_MASK_LSP_ATT_ERROR_BIT(x) ((x)&0x40)
256 #define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x) ((x)&0x20)
257 #define ISIS_MASK_LSP_ATT_DELAY_BIT(x) ((x)&0x10)
258 #define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x) ((x)&0x8)
259
260 #define ISIS_MASK_MTID(x) ((x)&0x0fff)
261 #define ISIS_MASK_MTFLAGS(x) ((x)&0xf000)
262
263 static struct tok isis_mt_flag_values[] = {
264 { 0x4000, "sub-TLVs present"},
265 { 0x8000, "ATT bit set"},
266 { 0, NULL}
267 };
268
269 #define ISIS_MASK_TLV_EXT_IP_UPDOWN(x) ((x)&0x80)
270 #define ISIS_MASK_TLV_EXT_IP_SUBTLV(x) ((x)&0x40)
271
272 #define ISIS_MASK_TLV_EXT_IP6_IE(x) ((x)&0x40)
273 #define ISIS_MASK_TLV_EXT_IP6_SUBTLV(x) ((x)&0x20)
274
275 #define ISIS_LSP_TLV_METRIC_SUPPORTED(x) ((x)&0x80)
276 #define ISIS_LSP_TLV_METRIC_IE(x) ((x)&0x40)
277 #define ISIS_LSP_TLV_METRIC_UPDOWN(x) ((x)&0x80)
278 #define ISIS_LSP_TLV_METRIC_VALUE(x) ((x)&0x3f)
279
280 #define ISIS_MASK_TLV_SHARED_RISK_GROUP(x) ((x)&0x1)
281
282 static struct tok isis_mt_values[] = {
283 { 0, "IPv4 unicast"},
284 { 1, "In-Band Management"},
285 { 2, "IPv6 unicast"},
286 { 3, "Multicast"},
287 { 4095, "Development, Experimental or Proprietary"},
288 { 0, NULL }
289 };
290
291 static struct tok isis_iih_circuit_type_values[] = {
292 { 1, "Level 1 only"},
293 { 2, "Level 2 only"},
294 { 3, "Level 1, Level 2"},
295 { 0, NULL}
296 };
297
298 #define ISIS_LSP_TYPE_UNUSED0 0
299 #define ISIS_LSP_TYPE_LEVEL_1 1
300 #define ISIS_LSP_TYPE_UNUSED2 2
301 #define ISIS_LSP_TYPE_LEVEL_2 3
302
303 static struct tok isis_lsp_istype_values[] = {
304 { ISIS_LSP_TYPE_UNUSED0, "Unused 0x0 (invalid)"},
305 { ISIS_LSP_TYPE_LEVEL_1, "L1 IS"},
306 { ISIS_LSP_TYPE_UNUSED2, "Unused 0x2 (invalid)"},
307 { ISIS_LSP_TYPE_LEVEL_2, "L1L2 IS"},
308 { 0, NULL }
309 };
310
311 static struct tok osi_nlpid_values[] = {
312 { NLPID_CLNS, "CLNS"},
313 { NLPID_IP, "IPv4"},
314 { NLPID_IP6, "IPv6"},
315 { 0, NULL }
316 };
317
318 /*
319 * Katz's point to point adjacency TLV uses codes to tell us the state of
320 * the remote adjacency. Enumerate them.
321 */
322
323 #define ISIS_PTP_ADJ_UP 0
324 #define ISIS_PTP_ADJ_INIT 1
325 #define ISIS_PTP_ADJ_DOWN 2
326
327
328 static struct tok isis_ptp_adjancey_values[] = {
329 { ISIS_PTP_ADJ_UP, "Up" },
330 { ISIS_PTP_ADJ_INIT, "Initializing" },
331 { ISIS_PTP_ADJ_DOWN, "Down" },
332 { 0, NULL}
333 };
334
335 struct isis_tlv_ptp_adj {
336 u_int8_t adjacency_state;
337 u_int8_t extd_local_circuit_id[4];
338 u_int8_t neighbor_sysid[SYSTEM_ID_LEN];
339 u_int8_t neighbor_extd_local_circuit_id[4];
340 };
341
342 static int osi_cksum(const u_int8_t *, u_int);
343 static void esis_print(const u_int8_t *, u_int);
344 static int isis_print(const u_int8_t *, u_int);
345
346 struct isis_metric_block {
347 u_int8_t metric_default;
348 u_int8_t metric_delay;
349 u_int8_t metric_expense;
350 u_int8_t metric_error;
351 };
352
353 struct isis_tlv_is_reach {
354 struct isis_metric_block isis_metric_block;
355 u_int8_t neighbor_nodeid[NODE_ID_LEN];
356 };
357
358 struct isis_tlv_es_reach {
359 struct isis_metric_block isis_metric_block;
360 u_int8_t neighbor_sysid[SYSTEM_ID_LEN];
361 };
362
363 struct isis_tlv_ip_reach {
364 struct isis_metric_block isis_metric_block;
365 u_int8_t prefix[4];
366 u_int8_t mask[4];
367 };
368
369 static struct tok isis_is_reach_virtual_values[] = {
370 { 0, "IsNotVirtual"},
371 { 1, "IsVirtual"},
372 { 0, NULL }
373 };
374
375 static struct tok isis_restart_flag_values[] = {
376 { 0x1, "Restart Request"},
377 { 0x2, "Restart Acknowledgement"},
378 { 0, NULL }
379 };
380
381 struct isis_common_header {
382 u_int8_t nlpid;
383 u_int8_t fixed_len;
384 u_int8_t version; /* Protocol version */
385 u_int8_t id_length;
386 u_int8_t pdu_type; /* 3 MSbits are reserved */
387 u_int8_t pdu_version; /* Packet format version */
388 u_int8_t reserved;
389 u_int8_t max_area;
390 };
391
392 struct isis_iih_lan_header {
393 u_int8_t circuit_type;
394 u_int8_t source_id[SYSTEM_ID_LEN];
395 u_int8_t holding_time[2];
396 u_int8_t pdu_len[2];
397 u_int8_t priority;
398 u_int8_t lan_id[NODE_ID_LEN];
399 };
400
401 struct isis_iih_ptp_header {
402 u_int8_t circuit_type;
403 u_int8_t source_id[SYSTEM_ID_LEN];
404 u_int8_t holding_time[2];
405 u_int8_t pdu_len[2];
406 u_int8_t circuit_id;
407 };
408
409 struct isis_lsp_header {
410 u_int8_t pdu_len[2];
411 u_int8_t remaining_lifetime[2];
412 u_int8_t lsp_id[LSP_ID_LEN];
413 u_int8_t sequence_number[4];
414 u_int8_t checksum[2];
415 u_int8_t typeblock;
416 };
417
418 struct isis_csnp_header {
419 u_int8_t pdu_len[2];
420 u_int8_t source_id[NODE_ID_LEN];
421 u_int8_t start_lsp_id[LSP_ID_LEN];
422 u_int8_t end_lsp_id[LSP_ID_LEN];
423 };
424
425 struct isis_psnp_header {
426 u_int8_t pdu_len[2];
427 u_int8_t source_id[NODE_ID_LEN];
428 };
429
430 struct isis_tlv_lsp {
431 u_int8_t remaining_lifetime[2];
432 u_int8_t lsp_id[LSP_ID_LEN];
433 u_int8_t sequence_number[4];
434 u_int8_t checksum[2];
435 };
436
437
438 /* allocate space for the following string
439 * xx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xx
440 * 50 bytes plus one termination byte */
441 static char *
442 print_nsap(register const u_int8_t *pptr, register int nsap_length)
443 {
444 int nsap_idx;
445 static char nsap_ascii_output[51];
446 char *junk_buf = nsap_ascii_output;
447
448 if (nsap_length < 1 || nsap_length > 20) {
449 snprintf(nsap_ascii_output, sizeof(nsap_ascii_output),
450 "illegal length");
451 return (nsap_ascii_output);
452 }
453
454 for (nsap_idx = 0; nsap_idx < nsap_length; nsap_idx++) {
455 if (!TTEST2(*pptr, 1))
456 return (0);
457 snprintf(junk_buf,
458 sizeof(nsap_ascii_output) - (junk_buf - nsap_ascii_output),
459 "%02x", *pptr++);
460 junk_buf += strlen(junk_buf);
461 if (((nsap_idx & 1) == 0) &&
462 (nsap_idx + 1 < nsap_length)) {
463 *junk_buf++ = '.';
464 }
465 }
466 *(junk_buf) = '\0';
467 return (nsap_ascii_output);
468 }
469
470 #define ISIS_COMMON_HEADER_SIZE (sizeof(struct isis_common_header))
471 #define ISIS_IIH_LAN_HEADER_SIZE (sizeof(struct isis_iih_lan_header))
472 #define ISIS_IIH_PTP_HEADER_SIZE (sizeof(struct isis_iih_ptp_header))
473 #define ISIS_LSP_HEADER_SIZE (sizeof(struct isis_lsp_header))
474 #define ISIS_CSNP_HEADER_SIZE (sizeof(struct isis_csnp_header))
475 #define ISIS_PSNP_HEADER_SIZE (sizeof(struct isis_psnp_header))
476
477 void isoclns_print(const u_int8_t *p, u_int length, u_int caplen)
478 {
479 u_int8_t pdu_type;
480 const struct isis_common_header *header;
481
482 header = (const struct isis_common_header *)p;
483 pdu_type = header->pdu_type & PDU_TYPE_MASK;
484
485 printf("%sOSI", caplen < 1 ? "|" : "");
486
487 if (caplen < 1) /* enough bytes on the wire ? */
488 return;
489
490 switch (*p) {
491
492 case NLPID_CLNS:
493 (void)printf(", CLNS, length %u", length);
494 break;
495
496 case NLPID_ESIS:
497 esis_print(p, length);
498 return;
499
500 case NLPID_ISIS:
501 if (!isis_print(p, length))
502 print_unknown_data(p,"\n\t",caplen);
503 break;
504
505 case NLPID_NULLNS:
506 (void)printf(", ISO NULLNS, length: %u", length);
507 break;
508
509 default:
510 (void)printf(", Unknown NLPID 0x%02x, length: %u", p[0], length);
511 if (caplen > 1)
512 print_unknown_data(p,"\n\t",caplen);
513 break;
514 }
515 }
516
517 #define ESIS_REDIRECT 6
518 #define ESIS_ESH 2
519 #define ESIS_ISH 4
520
521 static struct tok esis_values[] = {
522 { ESIS_REDIRECT, "redirect"},
523 { ESIS_ESH, "ESH"},
524 { ESIS_ISH, "ISH"},
525 { 0, NULL }
526 };
527
528 struct esis_hdr {
529 u_int8_t version;
530 u_int8_t reserved;
531 u_int8_t type;
532 u_int8_t tmo[2];
533 u_int8_t cksum[2];
534 };
535
536 static void
537 esis_print(const u_int8_t *p, u_int length)
538 {
539 const u_int8_t *ep;
540 u_int li;
541 const struct esis_hdr *eh;
542
543 if (length <= 2) {
544 if (qflag)
545 printf(" bad pkt!");
546 else
547 printf(" no header at all!");
548 return;
549 }
550 li = p[1];
551 eh = (const struct esis_hdr *) &p[2];
552 ep = p + li;
553 if (li > length) {
554 if (qflag)
555 printf(" bad pkt!");
556 else
557 printf(" LI(%d) > PDU size (%d)!", li, length);
558 return;
559 }
560 if (li < sizeof(struct esis_hdr) + 2) {
561 if (qflag)
562 printf(" bad pkt!");
563 else {
564 printf(" too short for esis header %d:", li);
565 while (--length != 0)
566 printf("%02X", *p++);
567 }
568 return;
569 }
570
571 printf(", ES-IS, %s, length %u",
572 tok2str(esis_values,"unknown type: %u",eh->type & 0x1f),
573 length);
574
575 if(vflag < 1)
576 return;
577
578 if (vflag && osi_cksum(p, li)) {
579 printf(" bad cksum (got 0x%02x%02x)",
580 eh->cksum[1], eh->cksum[0]);
581 default_print(p, length);
582 return;
583 }
584 if (eh->version != 1) {
585 printf(" unsupported version %d", eh->version);
586 return;
587 }
588 p += sizeof(*eh) + 2;
589 li -= sizeof(*eh) + 2; /* protoid * li */
590
591 switch (eh->type & 0x1f) {
592 case ESIS_REDIRECT: {
593 const u_int8_t *dst, *snpa, *is;
594
595 dst = p; p += *p + 1;
596 if (p > snapend)
597 return;
598 printf("\n\t\t %s", isonsap_string(dst));
599 snpa = p; p += *p + 1;
600 is = p; p += *p + 1;
601 if (p > snapend)
602 return;
603 if (p > ep) {
604 printf(" [bad li]");
605 return;
606 }
607 if (is[0] == 0)
608 printf(" > %s", etheraddr_string(&snpa[1]));
609 else
610 printf(" > %s", isonsap_string(is));
611 li = ep - p;
612 break;
613 }
614
615 case ESIS_ESH:
616 break;
617
618 case ESIS_ISH: {
619 const u_int8_t *is;
620
621 is = p; p += *p + 1;
622 if (p > ep) {
623 printf(" [bad li]");
624 return;
625 }
626 if (p > snapend)
627 return;
628 if (!qflag)
629 printf("\n\tNET: %s", print_nsap(is+1,*is));
630 li = ep - p;
631 break;
632 }
633
634 default:
635 if (vflag <= 1) {
636 if (p < snapend)
637 print_unknown_data(p,"\n\t ",snapend-p);
638 }
639 return;
640 }
641
642 /* hexdump - FIXME ? */
643 if (vflag > 1) {
644 if (p < snapend)
645 print_unknown_data(p,"\n\t ",snapend-p);
646 }
647 if (vflag)
648 while (p < ep && li) {
649 u_int op, opli;
650 const u_int8_t *q;
651
652 if (snapend - p < 2)
653 return;
654 if (li < 2) {
655 printf(", bad opts/li");
656 return;
657 }
658 op = *p++;
659 opli = *p++;
660 li -= 2;
661 if (opli > li) {
662 printf(", opt (%d) too long", op);
663 return;
664 }
665 li -= opli;
666 q = p;
667 p += opli;
668
669 if (snapend < p)
670 return;
671
672 if (op == TLV_HOLDTIME && opli == 2) {
673 printf("\n\tholdtime: %us", EXTRACT_16BITS(q));
674 continue;
675 }
676
677 if (op == TLV_PROTOCOLS && opli >= 1) {
678 printf("\n\t%s (length: %u): %s",
679 tok2str(isis_tlv_values, "unknown", op),
680 opli,
681 tok2str(osi_nlpid_values,"Unknown 0x%02x",*q));
682 continue;
683 }
684
685 print_unknown_data(q,"\n\t ",opli);
686 }
687 }
688
689 /* shared routine for printing system, node and lsp-ids
690 * allocate space for the worst-case string
691 * xxxx.xxxx.xxxx.yy-zz
692 * 20 bytes plus one termination byte */
693 static char *
694 isis_print_id(const u_int8_t *cp, int id_len)
695 {
696 int i;
697 static char id[21];
698 char *pos = id;
699
700 for (i = 1; i <= SYSTEM_ID_LEN; i++) {
701 snprintf(pos, sizeof(id) - (pos - id), "%02x", *cp++);
702 pos += strlen(pos);
703 if (i == 2 || i == 4)
704 *pos++ = '.';
705 }
706 if (id_len >= NODE_ID_LEN) {
707 snprintf(pos, sizeof(id) - (pos - id), ".%02x", *cp++);
708 pos += strlen(pos);
709 }
710 if (id_len == LSP_ID_LEN)
711 snprintf(pos, sizeof(id) - (pos - id), "-%02x", *cp);
712 return (id);
713 }
714
715 /* print the 4-byte metric block which is common found in the old-style TLVs */
716 static int
717 isis_print_metric_block (const struct isis_metric_block *isis_metric_block)
718 {
719 printf(", Default Metric: %d, %s",
720 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_default),
721 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_default) ? "External" : "Internal");
722 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_delay))
723 printf("\n\t\t Delay Metric: %d, %s",
724 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_delay),
725 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_delay) ? "External" : "Internal");
726 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_expense))
727 printf("\n\t\t Expense Metric: %d, %s",
728 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_expense),
729 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_expense) ? "External" : "Internal");
730 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_error))
731 printf("\n\t\t Error Metric: %d, %s",
732 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_error),
733 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_error) ? "External" : "Internal");
734
735 return(1); /* everything is ok */
736 }
737
738 static int
739 isis_print_tlv_ip_reach (const u_int8_t *cp, const char *ident, int length)
740 {
741 int prefix_len;
742 const struct isis_tlv_ip_reach *tlv_ip_reach;
743
744 tlv_ip_reach = (const struct isis_tlv_ip_reach *)cp;
745
746 while (length > 0) {
747 if ((size_t)length < sizeof(*tlv_ip_reach)) {
748 printf("short IPv4 reachability (%d vs %lu)",
749 length,
750 (unsigned long)sizeof(*tlv_ip_reach));
751 return (0);
752 }
753
754 if (!TTEST(*tlv_ip_reach))
755 return (0);
756
757 prefix_len = mask2plen(EXTRACT_32BITS(tlv_ip_reach->mask));
758
759 if (prefix_len == -1)
760 printf("%sIPv4 prefix: %s mask %s",
761 ident,
762 ipaddr_string((tlv_ip_reach->prefix)),
763 ipaddr_string((tlv_ip_reach->mask)));
764 else
765 printf("%sIPv4 prefix: %15s/%u",
766 ident,
767 ipaddr_string((tlv_ip_reach->prefix)),
768 prefix_len);
769
770 printf(", Distribution: %s, Metric: %u, %s",
771 ISIS_LSP_TLV_METRIC_UPDOWN(tlv_ip_reach->isis_metric_block.metric_default) ? "down" : "up",
772 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_default),
773 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_default) ? "External" : "Internal");
774
775 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_delay))
776 printf("%s Delay Metric: %u, %s",
777 ident,
778 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_delay),
779 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_delay) ? "External" : "Internal");
780
781 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_expense))
782 printf("%s Expense Metric: %u, %s",
783 ident,
784 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_expense),
785 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_expense) ? "External" : "Internal");
786
787 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_error))
788 printf("%s Error Metric: %u, %s",
789 ident,
790 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_error),
791 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_error) ? "External" : "Internal");
792
793 length -= sizeof(struct isis_tlv_ip_reach);
794 tlv_ip_reach++;
795 }
796 return (1);
797 }
798
799 /*
800 * this is the common IP-REACH subTLV decoder it is called
801 * from various EXTD-IP REACH TLVs (135,235,236,237)
802 */
803
804 static int
805 isis_print_ip_reach_subtlv (const u_int8_t *tptr,int subt,int subl,const char *ident) {
806
807 /* first lets see if we know the subTLVs name*/
808 printf("%s%s (subTLV #%u), length: %u",
809 ident,
810 tok2str(isis_ext_ip_reach_subtlv_values,
811 "unknown",
812 subt),
813 subt,
814 subl);
815
816 if (!TTEST2(*tptr,subl))
817 goto trunctlv;
818
819 switch(subt) {
820 case SUBTLV_IP_REACH_ADMIN_TAG32:
821 while (subl >= 4) {
822 printf(", 0x%08x (=%u)",
823 EXTRACT_32BITS(tptr),
824 EXTRACT_32BITS(tptr));
825 tptr+=4;
826 subl-=4;
827 }
828 break;
829 case SUBTLV_IP_REACH_ADMIN_TAG64:
830 while (subl >= 8) {
831 printf(", 0x%08x%08x",
832 EXTRACT_32BITS(tptr),
833 EXTRACT_32BITS(tptr+4));
834 tptr+=8;
835 subl-=8;
836 }
837 break;
838 default:
839 if(!print_unknown_data(tptr,"\n\t\t ",
840 subl))
841 return(0);
842 break;
843 }
844 return(1);
845
846 trunctlv:
847 printf("%spacket exceeded snapshot",ident);
848 return(0);
849 }
850
851 /*
852 * this is the common IS-REACH subTLV decoder it is called
853 * from isis_print_ext_is_reach()
854 */
855
856 static int
857 isis_print_is_reach_subtlv (const u_int8_t *tptr,int subt,int subl,const char *ident) {
858
859 int priority_level;
860 union { /* int to float conversion buffer for several subTLVs */
861 float f;
862 u_int32_t i;
863 } bw;
864
865 /* first lets see if we know the subTLVs name*/
866 printf("%s%s (subTLV #%u), length: %u",
867 ident,
868 tok2str(isis_ext_is_reach_subtlv_values,
869 "unknown",
870 subt),
871 subt,
872 subl);
873
874 if (!TTEST2(*tptr,subl))
875 goto trunctlv;
876
877 switch(subt) {
878 case SUBTLV_EXT_IS_REACH_ADMIN_GROUP:
879 case SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID:
880 case SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID:
881 printf(", 0x%08x", EXTRACT_32BITS(tptr));
882 if (subl == 8) /* draft-ietf-isis-gmpls-extensions */
883 printf(", 0x%08x", EXTRACT_32BITS(tptr+4));
884 break;
885 case SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR:
886 case SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR:
887 printf(", %s", ipaddr_string(tptr));
888 break;
889 case SUBTLV_EXT_IS_REACH_MAX_LINK_BW :
890 case SUBTLV_EXT_IS_REACH_RESERVABLE_BW:
891 bw.i = EXTRACT_32BITS(tptr);
892 printf(", %.3f Mbps", bw.f*8/1000000 );
893 break;
894 case SUBTLV_EXT_IS_REACH_UNRESERVED_BW :
895 for (priority_level = 0; priority_level < 8; priority_level++) {
896 bw.i = EXTRACT_32BITS(tptr);
897 printf("%s priority level %d: %.3f Mbps",
898 ident,
899 priority_level,
900 bw.f*8/1000000 );
901 tptr+=4;
902 }
903 break;
904 case SUBTLV_EXT_IS_REACH_TE_METRIC:
905 printf(", %u", EXTRACT_24BITS(tptr));
906 break;
907 case SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE:
908 printf(", %s, Priority %u",
909 bittok2str(gmpls_link_prot_values, "none", *tptr),
910 *(tptr+1));
911 break;
912 case SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR:
913 printf("%s Interface Switching Capability:%s",
914 ident,
915 tok2str(gmpls_switch_cap_values, "Unknown", *(tptr)));
916 printf(", LSP Encoding: %s",
917 tok2str(gmpls_encoding_values, "Unknown", *(tptr+1)));
918 tptr+=4;
919 printf("%s Max LSP Bandwidth:",ident);
920 for (priority_level = 0; priority_level < 8; priority_level++) {
921 bw.i = EXTRACT_32BITS(tptr);
922 printf("%s priority level %d: %.3f Mbps",
923 ident,
924 priority_level,
925 bw.f*8/1000000 );
926 tptr+=4;
927 }
928 subl-=36;
929 /* there is some optional stuff left to decode but this is as of yet
930 not specified so just lets hexdump what is left */
931 if(subl>0){
932 if(!print_unknown_data(tptr,"\n\t\t ",
933 subl-36))
934 return(0);
935 }
936 break;
937 default:
938 if(!print_unknown_data(tptr,"\n\t\t ",
939 subl))
940 return(0);
941 break;
942 }
943 return(1);
944
945 trunctlv:
946 printf("%spacket exceeded snapshot",ident);
947 return(0);
948 }
949
950
951 /*
952 * this is the common IS-REACH decoder it is called
953 * from various EXTD-IS REACH style TLVs (22,24,222)
954 */
955
956 static int
957 isis_print_ext_is_reach (const u_int8_t *tptr,const char *ident, int tlv) {
958
959 char ident_buffer[20];
960 int subt,subl,tslen;
961 int proc_bytes = 0; /* how many bytes did we process ? */
962
963 if (!TTEST2(*tptr, NODE_ID_LEN))
964 return(0);
965
966 printf("%sIS Neighbor: %s", ident, isis_print_id(tptr, NODE_ID_LEN));
967 tptr+=(NODE_ID_LEN);
968
969 if (tlv != TLV_IS_ALIAS_ID) {
970 if (!TTEST2(*tptr, 3))
971 return(0);
972 printf(", Metric: %d",EXTRACT_24BITS(tptr));
973 tptr+=3;
974 }
975
976 if (!TTEST2(*tptr, 1))
977 return(0);
978 tslen=*(tptr++); /* read out subTLV length */
979 proc_bytes=NODE_ID_LEN+3+1;
980 printf(", %ssub-TLVs present",tslen ? "" : "no ");
981 if (tslen) {
982 printf(" (%u)",tslen);
983 while (tslen>0) {
984 if (!TTEST2(*tptr,2))
985 return(0);
986 subt=*(tptr++);
987 subl=*(tptr++);
988 /* prepend the ident string */
989 snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident);
990 if(!isis_print_is_reach_subtlv(tptr,subt,subl,ident_buffer))
991 return(0);
992 tptr+=subl;
993 tslen-=(subl+2);
994 proc_bytes+=(subl+2);
995 }
996 }
997 return(proc_bytes);
998 }
999
1000 /*
1001 * this is the common Multi Topology ID decoder
1002 * it is called from various MT-TLVs (222,229,235,237)
1003 */
1004
1005 static int
1006 isis_print_mtid (const u_int8_t *tptr,const char *ident) {
1007
1008 if (!TTEST2(*tptr, 2))
1009 return(0);
1010
1011 printf("%s%s",
1012 ident,
1013 tok2str(isis_mt_values,
1014 "Reserved for IETF Consensus",
1015 ISIS_MASK_MTID(EXTRACT_16BITS(tptr))));
1016
1017 printf(" Topology (0x%03x), Flags: [%s]",
1018 ISIS_MASK_MTID(EXTRACT_16BITS(tptr)),
1019 bittok2str(isis_mt_flag_values, "none",ISIS_MASK_MTFLAGS(EXTRACT_16BITS(tptr))));
1020
1021 return(2);
1022 }
1023
1024 /*
1025 * this is the common extended IP reach decoder
1026 * it is called from TLVs (135,235,236,237)
1027 * we process the TLV and optional subTLVs and return
1028 * the amount of processed bytes
1029 */
1030
1031 static int
1032 isis_print_extd_ip_reach (const u_int8_t *tptr, const char *ident, u_int16_t afi) {
1033
1034 char ident_buffer[20];
1035 u_int8_t prefix[16]; /* shared copy buffer for IPv4 and IPv6 prefixes */
1036 u_int metric, status_byte, bit_length, byte_length, sublen, processed, subtlvtype, subtlvlen;
1037
1038 if (!TTEST2(*tptr, 4))
1039 return (0);
1040 metric = EXTRACT_32BITS(tptr);
1041 processed=4;
1042 tptr+=4;
1043
1044 if (afi == IPV4) {
1045 if (!TTEST2(*tptr, 1)) /* fetch status byte */
1046 return (0);
1047 status_byte=*(tptr++);
1048 bit_length = status_byte&0x3f;
1049 processed++;
1050 #ifdef INET6
1051 } else if (afi == IPV6) {
1052 if (!TTEST2(*tptr, 1)) /* fetch status & prefix_len byte */
1053 return (0);
1054 status_byte=*(tptr++);
1055 bit_length=*(tptr++);
1056 processed+=2;
1057 #endif
1058 } else
1059 return (0); /* somebody is fooling us */
1060
1061 byte_length = (bit_length + 7) / 8; /* prefix has variable length encoding */
1062
1063 if (!TTEST2(*tptr, byte_length))
1064 return (0);
1065 memset(prefix, 0, 16); /* clear the copy buffer */
1066 memcpy(prefix,tptr,byte_length); /* copy as much as is stored in the TLV */
1067 tptr+=byte_length;
1068 processed+=byte_length;
1069
1070 if (afi == IPV4)
1071 printf("%sIPv4 prefix: %15s/%u",
1072 ident,
1073 ipaddr_string(prefix),
1074 bit_length);
1075 #ifdef INET6
1076 if (afi == IPV6)
1077 printf("%sIPv6 prefix: %s/%u",
1078 ident,
1079 ip6addr_string(prefix),
1080 bit_length);
1081 #endif
1082
1083 printf(", Distribution: %s, Metric: %u",
1084 ISIS_MASK_TLV_EXT_IP_UPDOWN(status_byte) ? "down" : "up",
1085 metric);
1086
1087 if (afi == IPV4 && ISIS_MASK_TLV_EXT_IP_SUBTLV(status_byte))
1088 printf(", sub-TLVs present");
1089 #ifdef INET6
1090 if (afi == IPV6)
1091 printf(", %s%s",
1092 ISIS_MASK_TLV_EXT_IP6_IE(status_byte) ? "External" : "Internal",
1093 ISIS_MASK_TLV_EXT_IP6_SUBTLV(status_byte) ? ", sub-TLVs present" : "");
1094 #endif
1095
1096 if ((ISIS_MASK_TLV_EXT_IP_SUBTLV(status_byte) && afi == IPV4) ||
1097 (ISIS_MASK_TLV_EXT_IP6_SUBTLV(status_byte) && afi == IPV6)) {
1098 /* assume that one prefix can hold more
1099 than one subTLV - therefore the first byte must reflect
1100 the aggregate bytecount of the subTLVs for this prefix
1101 */
1102 if (!TTEST2(*tptr, 1))
1103 return (0);
1104 sublen=*(tptr++);
1105 processed+=sublen+1;
1106 printf(" (%u)",sublen); /* print out subTLV length */
1107
1108 while (sublen>0) {
1109 if (!TTEST2(*tptr,2))
1110 return (0);
1111 subtlvtype=*(tptr++);
1112 subtlvlen=*(tptr++);
1113 /* prepend the ident string */
1114 snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident);
1115 if(!isis_print_ip_reach_subtlv(tptr,subtlvtype,subtlvlen,ident_buffer))
1116 return(0);
1117 tptr+=subtlvlen;
1118 sublen-=(subtlvlen+2);
1119 }
1120 }
1121 return (processed);
1122 }
1123
1124 /*
1125 * isis_print
1126 * Decode IS-IS packets. Return 0 on error.
1127 */
1128
1129 static int isis_print (const u_int8_t *p, u_int length)
1130 {
1131 const struct isis_common_header *header;
1132
1133 const struct isis_iih_lan_header *header_iih_lan;
1134 const struct isis_iih_ptp_header *header_iih_ptp;
1135 const struct isis_lsp_header *header_lsp;
1136 const struct isis_csnp_header *header_csnp;
1137 const struct isis_psnp_header *header_psnp;
1138
1139 const struct isis_tlv_lsp *tlv_lsp;
1140 const struct isis_tlv_ptp_adj *tlv_ptp_adj;
1141 const struct isis_tlv_is_reach *tlv_is_reach;
1142 const struct isis_tlv_es_reach *tlv_es_reach;
1143
1144 u_int8_t pdu_type, max_area, id_length, tlv_type, tlv_len, tmp, alen, lan_alen, prefix_len;
1145 u_int8_t ext_is_len, ext_ip_len, mt_len;
1146 const u_int8_t *optr, *pptr, *tptr;
1147 u_short packet_len,pdu_len;
1148 u_int i;
1149
1150 packet_len=length;
1151 optr = p; /* initialize the _o_riginal pointer to the packet start -
1152 need it for parsing the checksum TLV */
1153 header = (const struct isis_common_header *)p;
1154 TCHECK(*header);
1155 pptr = p+(ISIS_COMMON_HEADER_SIZE);
1156 header_iih_lan = (const struct isis_iih_lan_header *)pptr;
1157 header_iih_ptp = (const struct isis_iih_ptp_header *)pptr;
1158 header_lsp = (const struct isis_lsp_header *)pptr;
1159 header_csnp = (const struct isis_csnp_header *)pptr;
1160 header_psnp = (const struct isis_psnp_header *)pptr;
1161
1162 /*
1163 * Sanity checking of the header.
1164 */
1165
1166 if (header->version != ISIS_VERSION) {
1167 printf(", version %d packet not supported", header->version);
1168 return (0);
1169 }
1170
1171 if ((header->id_length != SYSTEM_ID_LEN) && (header->id_length != 0)) {
1172 printf(", system ID length of %d is not supported",
1173 header->id_length);
1174 return (0);
1175 }
1176
1177 if (header->pdu_version != ISIS_VERSION) {
1178 printf(", version %d packet not supported", header->pdu_version);
1179 return (0);
1180 }
1181
1182 max_area = header->max_area;
1183 switch(max_area) {
1184 case 0:
1185 max_area = 3; /* silly shit */
1186 break;
1187 case 255:
1188 printf(", bad packet -- 255 areas");
1189 return (0);
1190 default:
1191 break;
1192 }
1193
1194 id_length = header->id_length;
1195 switch(id_length) {
1196 case 0:
1197 id_length = 6; /* silly shit again */
1198 break;
1199 case 1: /* 1-8 are valid sys-ID lenghts */
1200 case 2:
1201 case 3:
1202 case 4:
1203 case 5:
1204 case 6:
1205 case 7:
1206 case 8:
1207 break;
1208 case 255:
1209 id_length = 0; /* entirely useless */
1210 break;
1211 default:
1212 break;
1213 }
1214
1215 /* toss any non 6-byte sys-ID len PDUs */
1216 if (id_length != 6 ) {
1217 printf(", bad packet -- illegal sys-ID length (%u)", id_length);
1218 return (0);
1219 }
1220
1221 pdu_type=header->pdu_type;
1222
1223 /* in non-verbose mode print the basic PDU Type plus PDU specific brief information*/
1224 if (vflag < 1) {
1225 printf(", IS-IS, %s",
1226 tok2str(isis_pdu_values,"unknown PDU-Type %u",pdu_type));
1227
1228 switch (pdu_type) {
1229
1230 case L1_LAN_IIH:
1231 case L2_LAN_IIH:
1232 printf(", source-id %s", isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN));
1233 break;
1234 case PTP_IIH:
1235 printf(", source-id %s", isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN));
1236 break;
1237 case L1_LSP:
1238 case L2_LSP:
1239 printf(", lsp-id %s, seq 0x%08x, lifetime %5us",
1240 isis_print_id(header_lsp->lsp_id, LSP_ID_LEN),
1241 EXTRACT_32BITS(header_lsp->sequence_number),
1242 EXTRACT_16BITS(header_lsp->remaining_lifetime));
1243 break;
1244 case L1_CSNP:
1245 case L2_CSNP:
1246 printf(", source-id %s", isis_print_id(header_csnp->source_id,SYSTEM_ID_LEN));
1247 break;
1248 case L1_PSNP:
1249 case L2_PSNP:
1250 printf(", source-id %s", isis_print_id(header_psnp->source_id,SYSTEM_ID_LEN));
1251 break;
1252
1253 }
1254 printf(", length %u", length);
1255
1256 return(1);
1257 }
1258
1259 /* ok they seem to want to know everything - lets fully decode it */
1260 printf(", IS-IS, length: %u",length);
1261
1262 printf("\n\thlen: %u, v: %u, pdu-v: %u, sys-id-len: %u (%u), max-area: %u (%u)",
1263 header->fixed_len,
1264 header->version,
1265 header->pdu_version,
1266 id_length,
1267 header->id_length,
1268 max_area,
1269 header->max_area);
1270
1271 /* first lets see if we know the PDU name*/
1272 printf(", pdu-type: %s",
1273 tok2str(isis_pdu_values,
1274 "unknown, type %u",
1275 pdu_type));
1276
1277 if (vflag > 1) {
1278 if(!print_unknown_data(optr,"\n\t",8)) /* provide the _o_riginal pointer */
1279 return(0); /* for optionally debugging the common header */
1280 }
1281
1282 switch (pdu_type) {
1283
1284 case L1_LAN_IIH:
1285 case L2_LAN_IIH:
1286 if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) {
1287 printf(", bogus fixed header length %u should be %lu",
1288 header->fixed_len, (unsigned long)ISIS_IIH_LAN_HEADER_SIZE);
1289 return (0);
1290 }
1291
1292 pdu_len=EXTRACT_16BITS(header_iih_lan->pdu_len);
1293 if (packet_len>pdu_len) {
1294 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
1295 length=pdu_len;
1296 }
1297
1298 TCHECK(*header_iih_lan);
1299 printf("\n\t source-id: %s, holding time: %us, Flags: [%s]",
1300 isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN),
1301 EXTRACT_16BITS(header_iih_lan->holding_time),
1302 tok2str(isis_iih_circuit_type_values,
1303 "unknown circuit type 0x%02x",
1304 header_iih_lan->circuit_type));
1305
1306 printf("\n\t lan-id: %s, Priority: %u, PDU length: %u",
1307 isis_print_id(header_iih_lan->lan_id, NODE_ID_LEN),
1308 (header_iih_lan->priority) & PRIORITY_MASK,
1309 pdu_len);
1310
1311 if (vflag > 1) {
1312 if(!print_unknown_data(pptr,"\n\t ",ISIS_IIH_LAN_HEADER_SIZE))
1313 return(0);
1314 }
1315
1316 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
1317 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
1318 break;
1319
1320 case PTP_IIH:
1321 if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) {
1322 printf(", bogus fixed header length %u should be %lu",
1323 header->fixed_len, (unsigned long)ISIS_IIH_PTP_HEADER_SIZE);
1324 return (0);
1325 }
1326
1327 pdu_len=EXTRACT_16BITS(header_iih_ptp->pdu_len);
1328 if (packet_len>pdu_len) {
1329 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
1330 length=pdu_len;
1331 }
1332
1333 TCHECK(*header_iih_ptp);
1334 printf("\n\t source-id: %s, holding time: %us, circuit-id: 0x%02x, %s, PDU length: %u",
1335 isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN),
1336 EXTRACT_16BITS(header_iih_ptp->holding_time),
1337 header_iih_ptp->circuit_id,
1338 tok2str(isis_iih_circuit_type_values,
1339 "unknown circuit type 0x%02x",
1340 header_iih_ptp->circuit_type),
1341 pdu_len);
1342
1343 if (vflag > 1) {
1344 if(!print_unknown_data(pptr,"\n\t ",ISIS_IIH_PTP_HEADER_SIZE))
1345 return(0);
1346 }
1347
1348 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
1349 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
1350 break;
1351
1352 case L1_LSP:
1353 case L2_LSP:
1354 if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) {
1355 printf(", bogus fixed header length %u should be %lu",
1356 header->fixed_len, (unsigned long)ISIS_LSP_HEADER_SIZE);
1357 return (0);
1358 }
1359
1360 pdu_len=EXTRACT_16BITS(header_lsp->pdu_len);
1361 if (packet_len>pdu_len) {
1362 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
1363 length=pdu_len;
1364 }
1365
1366 TCHECK(*header_lsp);
1367 printf("\n\t lsp-id: %s, seq: 0x%08x, lifetime: %5us",
1368 isis_print_id(header_lsp->lsp_id, LSP_ID_LEN),
1369 EXTRACT_32BITS(header_lsp->sequence_number),
1370 EXTRACT_16BITS(header_lsp->remaining_lifetime));
1371 /* verify the checksum -
1372 * checking starts at the lsp-id field
1373 * which is 12 bytes after the packet start*/
1374 printf("\n\t chksum: 0x%04x (%s), PDU length: %u",
1375 EXTRACT_16BITS(header_lsp->checksum),
1376 (osi_cksum(optr+12, length-12)) ? "incorrect" : "correct",
1377 pdu_len);
1378
1379 printf(", %s", ISIS_MASK_LSP_OL_BIT(header_lsp->typeblock) ? "Overload bit set, " : "");
1380
1381 if (ISIS_MASK_LSP_ATT_BITS(header_lsp->typeblock)) {
1382 printf("%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : "");
1383 printf("%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : "");
1384 printf("%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : "");
1385 printf("%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : "");
1386 printf("ATT bit set, ");
1387 }
1388 printf("%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : "");
1389 printf("%s", tok2str(isis_lsp_istype_values,"Unknown(0x%x)",ISIS_MASK_LSP_ISTYPE_BITS(header_lsp->typeblock)));
1390
1391 if (vflag > 1) {
1392 if(!print_unknown_data(pptr,"\n\t ",ISIS_LSP_HEADER_SIZE))
1393 return(0);
1394 }
1395
1396 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
1397 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
1398 break;
1399
1400 case L1_CSNP:
1401 case L2_CSNP:
1402 if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) {
1403 printf(", bogus fixed header length %u should be %lu",
1404 header->fixed_len, (unsigned long)ISIS_CSNP_HEADER_SIZE);
1405 return (0);
1406 }
1407
1408 pdu_len=EXTRACT_16BITS(header_csnp->pdu_len);
1409 if (packet_len>pdu_len) {
1410 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
1411 length=pdu_len;
1412 }
1413
1414 TCHECK(*header_csnp);
1415 printf("\n\t source-id: %s, PDU length: %u",
1416 isis_print_id(header_csnp->source_id, NODE_ID_LEN),
1417 pdu_len);
1418 printf("\n\t start lsp-id: %s",
1419 isis_print_id(header_csnp->start_lsp_id, LSP_ID_LEN));
1420 printf("\n\t end lsp-id: %s",
1421 isis_print_id(header_csnp->end_lsp_id, LSP_ID_LEN));
1422
1423 if (vflag > 1) {
1424 if(!print_unknown_data(pptr,"\n\t ",ISIS_CSNP_HEADER_SIZE))
1425 return(0);
1426 }
1427
1428 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
1429 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
1430 break;
1431
1432 case L1_PSNP:
1433 case L2_PSNP:
1434 if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) {
1435 printf("- bogus fixed header length %u should be %lu",
1436 header->fixed_len, (unsigned long)ISIS_PSNP_HEADER_SIZE);
1437 return (0);
1438 }
1439
1440 pdu_len=EXTRACT_16BITS(header_psnp->pdu_len);
1441 if (packet_len>pdu_len) {
1442 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
1443 length=pdu_len;
1444 }
1445
1446 TCHECK(*header_psnp);
1447 printf("\n\t source-id: %s",
1448 isis_print_id(header_psnp->source_id, NODE_ID_LEN));
1449
1450 if (vflag > 1) {
1451 if(!print_unknown_data(pptr,"\n\t ",ISIS_PSNP_HEADER_SIZE))
1452 return(0);
1453 }
1454
1455 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
1456 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
1457 break;
1458
1459 default:
1460 if(!print_unknown_data(pptr,"\n\t ",length))
1461 return(0);
1462 return (0);
1463 }
1464
1465 /*
1466 * Now print the TLV's.
1467 */
1468
1469 while (packet_len >= 2) {
1470 if (pptr == snapend) {
1471 return (1);
1472 }
1473
1474 if (!TTEST2(*pptr, 2)) {
1475 printf("\n\t\t packet exceeded snapshot (%ld) bytes",
1476 (long)(pptr-snapend));
1477 return (1);
1478 }
1479 tlv_type = *pptr++;
1480 tlv_len = *pptr++;
1481 tmp =tlv_len; /* copy temporary len & pointer to packet data */
1482 tptr = pptr;
1483 packet_len -= 2;
1484 if (tlv_len > packet_len) {
1485 break;
1486 }
1487
1488 /* first lets see if we know the TLVs name*/
1489 printf("\n\t %s TLV #%u, length: %u",
1490 tok2str(isis_tlv_values,
1491 "unknown",
1492 tlv_type),
1493 tlv_type,
1494 tlv_len);
1495
1496 /* now check if we have a decoder otherwise do a hexdump at the end*/
1497 switch (tlv_type) {
1498 case TLV_AREA_ADDR:
1499 if (!TTEST2(*tptr, 1))
1500 goto trunctlv;
1501 alen = *tptr++;
1502 while (tmp && alen < tmp) {
1503 printf("\n\t Area address (length: %u): %s",
1504 alen,
1505 print_nsap(tptr, alen));
1506 tptr += alen;
1507 tmp -= alen + 1;
1508 if (tmp==0) /* if this is the last area address do not attemt a boundary check */
1509 break;
1510 if (!TTEST2(*tptr, 1))
1511 goto trunctlv;
1512 alen = *tptr++;
1513 }
1514 break;
1515 case TLV_ISNEIGH:
1516 while (tmp >= ETHER_ADDR_LEN) {
1517 if (!TTEST2(*tptr, ETHER_ADDR_LEN))
1518 goto trunctlv;
1519 printf("\n\t IS Neighbor: %s",isis_print_id(tptr,ETHER_ADDR_LEN));
1520 tmp -= ETHER_ADDR_LEN;
1521 tptr += ETHER_ADDR_LEN;
1522 }
1523 break;
1524
1525 case TLV_ISNEIGH_VARLEN:
1526 if (!TTEST2(*tptr, 1))
1527 goto trunctlv;
1528 lan_alen = *tptr++; /* LAN adress length */
1529 tmp --;
1530 printf("\n\t LAN address length %u bytes ",lan_alen);
1531 while (tmp >= lan_alen) {
1532 if (!TTEST2(*tptr, lan_alen))
1533 goto trunctlv;
1534 printf("\n\t\tIS Neighbor: %s",isis_print_id(tptr,lan_alen));
1535 tmp -= lan_alen;
1536 tptr +=lan_alen;
1537 }
1538 break;
1539
1540 case TLV_PADDING:
1541 break;
1542
1543 case TLV_MT_IS_REACH:
1544 while (tmp >= 2+NODE_ID_LEN+3+1) {
1545 mt_len = isis_print_mtid(tptr, "\n\t ");
1546 if (mt_len == 0) /* did something go wrong ? */
1547 goto trunctlv;
1548 tptr+=mt_len;
1549 tmp-=mt_len;
1550
1551 ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type);
1552 if (ext_is_len == 0) /* did something go wrong ? */
1553 goto trunctlv;
1554
1555 tmp-=ext_is_len;
1556 tptr+=ext_is_len;
1557 }
1558 break;
1559
1560 case TLV_IS_ALIAS_ID:
1561 while (tmp >= NODE_ID_LEN+1) { /* is it worth attempting a decode ? */
1562 ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type);
1563 if (ext_is_len == 0) /* did something go wrong ? */
1564 goto trunctlv;
1565 tmp-=ext_is_len;
1566 tptr+=ext_is_len;
1567 }
1568 break;
1569
1570 case TLV_EXT_IS_REACH:
1571 while (tmp >= NODE_ID_LEN+3+1) { /* is it worth attempting a decode ? */
1572 ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type);
1573 if (ext_is_len == 0) /* did something go wrong ? */
1574 goto trunctlv;
1575 tmp-=ext_is_len;
1576 tptr+=ext_is_len;
1577 }
1578 break;
1579 case TLV_IS_REACH:
1580 if (!TTEST2(*tptr,1)) /* check if there is one byte left to read out the virtual flag */
1581 goto trunctlv;
1582 printf("\n\t %s",
1583 tok2str(isis_is_reach_virtual_values,
1584 "bogus virtual flag 0x%02x",
1585 *tptr++));
1586 tlv_is_reach = (const struct isis_tlv_is_reach *)tptr;
1587 while (tmp >= sizeof(struct isis_tlv_is_reach)) {
1588 if (!TTEST(*tlv_is_reach))
1589 goto trunctlv;
1590 printf("\n\t IS Neighbor: %s",
1591 isis_print_id(tlv_is_reach->neighbor_nodeid, NODE_ID_LEN));
1592 isis_print_metric_block(&tlv_is_reach->isis_metric_block);
1593 tmp -= sizeof(struct isis_tlv_is_reach);
1594 tlv_is_reach++;
1595 }
1596 break;
1597
1598 case TLV_ESNEIGH:
1599 tlv_es_reach = (const struct isis_tlv_es_reach *)tptr;
1600 while (tmp >= sizeof(struct isis_tlv_es_reach)) {
1601 if (!TTEST(*tlv_es_reach))
1602 goto trunctlv;
1603 printf("\n\t ES Neighbor: %s",
1604 isis_print_id(tlv_es_reach->neighbor_sysid,SYSTEM_ID_LEN));
1605 isis_print_metric_block(&tlv_es_reach->isis_metric_block);
1606 tmp -= sizeof(struct isis_tlv_es_reach);
1607 tlv_es_reach++;
1608 }
1609 break;
1610
1611 /* those two TLVs share the same format */
1612 case TLV_IP_REACH:
1613 case TLV_IP_REACH_EXT:
1614 if (!isis_print_tlv_ip_reach(pptr, "\n\t ", tlv_len))
1615 return (1);
1616 break;
1617
1618 case TLV_EXT_IP_REACH:
1619 while (tmp>0) {
1620 ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", IPV4);
1621 if (ext_ip_len == 0) /* did something go wrong ? */
1622 goto trunctlv;
1623 tptr+=ext_ip_len;
1624 tmp-=ext_ip_len;
1625 }
1626 break;
1627
1628 case TLV_MT_IP_REACH:
1629 while (tmp>0) {
1630 mt_len = isis_print_mtid(tptr, "\n\t ");
1631 if (mt_len == 0) /* did something go wrong ? */
1632 goto trunctlv;
1633 tptr+=mt_len;
1634 tmp-=mt_len;
1635
1636 ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", IPV4);
1637 if (ext_ip_len == 0) /* did something go wrong ? */
1638 goto trunctlv;
1639 tptr+=ext_ip_len;
1640 tmp-=ext_ip_len;
1641 }
1642 break;
1643
1644 #ifdef INET6
1645 case TLV_IP6_REACH:
1646 while (tmp>0) {
1647 ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", IPV6);
1648 if (ext_ip_len == 0) /* did something go wrong ? */
1649 goto trunctlv;
1650 tptr+=ext_ip_len;
1651 tmp-=ext_ip_len;
1652 }
1653 break;
1654
1655 case TLV_MT_IP6_REACH:
1656 while (tmp>0) {
1657 mt_len = isis_print_mtid(tptr, "\n\t ");
1658 if (mt_len == 0) /* did something go wrong ? */
1659 goto trunctlv;
1660 tptr+=mt_len;
1661 tmp-=mt_len;
1662
1663 ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", IPV6);
1664 if (ext_ip_len == 0) /* did something go wrong ? */
1665 goto trunctlv;
1666 tptr+=ext_ip_len;
1667 tmp-=ext_ip_len;
1668 }
1669 break;
1670
1671 case TLV_IP6ADDR:
1672 while (tmp>0) {
1673 if (!TTEST2(*tptr, 16))
1674 goto trunctlv;
1675
1676 printf("\n\t IPv6 interface address: %s",
1677 ip6addr_string(tptr));
1678
1679 tptr += 16;
1680 tmp -= 16;
1681 }
1682 break;
1683 #endif
1684 case TLV_AUTH:
1685 if (!TTEST2(*tptr, 1))
1686 goto trunctlv;
1687
1688 printf("\n\t %s: ",
1689 tok2str(isis_subtlv_auth_values,
1690 "unknown Authentication type 0x%02x",
1691 *tptr));
1692
1693 switch (*tptr) {
1694 case SUBTLV_AUTH_SIMPLE:
1695 for(i=1;i<tlv_len;i++) {
1696 if (!TTEST2(*(tptr+i), 1))
1697 goto trunctlv;
1698 printf("%c",*(tptr+i));
1699 }
1700 break;
1701 case SUBTLV_AUTH_MD5:
1702 for(i=1;i<tlv_len;i++) {
1703 if (!TTEST2(*(tptr+i), 1))
1704 goto trunctlv;
1705 printf("%02x",*(tptr+i));
1706 }
1707 if (tlv_len != SUBTLV_AUTH_MD5_LEN+1)
1708 printf(", (malformed subTLV) ");
1709 break;
1710 case SUBTLV_AUTH_PRIVATE:
1711 default:
1712 if(!print_unknown_data(tptr+1,"\n\t\t ",tlv_len-1))
1713 return(0);
1714 break;
1715 }
1716 break;
1717
1718 case TLV_PTP_ADJ:
1719 tlv_ptp_adj = (const struct isis_tlv_ptp_adj *)tptr;
1720 if(tmp>=1) {
1721 if (!TTEST2(*tptr, 1))
1722 goto trunctlv;
1723 printf("\n\t Adjacency State: %s",
1724 tok2str(isis_ptp_adjancey_values, "0x%02x", *tptr));
1725 tmp--;
1726 }
1727 if(tmp>sizeof(tlv_ptp_adj->extd_local_circuit_id)) {
1728 if (!TTEST2(tlv_ptp_adj->extd_local_circuit_id,
1729 sizeof(tlv_ptp_adj->extd_local_circuit_id)))
1730 goto trunctlv;
1731 printf("\n\t Extended Local circuit ID: 0x%08x",
1732 EXTRACT_32BITS(tlv_ptp_adj->extd_local_circuit_id));
1733 tmp-=sizeof(tlv_ptp_adj->extd_local_circuit_id);
1734 }
1735 if(tmp>=SYSTEM_ID_LEN) {
1736 if (!TTEST2(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN))
1737 goto trunctlv;
1738 printf("\n\t Neighbor SystemID: %s",
1739 isis_print_id(tlv_ptp_adj->neighbor_sysid,SYSTEM_ID_LEN));
1740 tmp-=SYSTEM_ID_LEN;
1741 }
1742 if(tmp>=sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)) {
1743 if (!TTEST2(tlv_ptp_adj->neighbor_extd_local_circuit_id,
1744 sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)))
1745 goto trunctlv;
1746 printf("\n\t Neighbor Extended Local circuit ID: 0x%08x",
1747 EXTRACT_32BITS(tlv_ptp_adj->neighbor_extd_local_circuit_id));
1748 }
1749 break;
1750
1751 case TLV_PROTOCOLS:
1752 printf("\n\t NLPID(s): ");
1753 while (tmp>0) {
1754 if (!TTEST2(*(tptr), 1))
1755 goto trunctlv;
1756 printf("%s",
1757 tok2str(osi_nlpid_values,
1758 "Unknown 0x%02x",
1759 *tptr++));
1760 if (tmp>1) /* further NPLIDs ? - put comma */
1761 printf(", ");
1762 tmp--;
1763 }
1764 break;
1765
1766 case TLV_TE_ROUTER_ID:
1767 if (!TTEST2(*pptr, 4))
1768 goto trunctlv;
1769 printf("\n\t Traffic Engineering Router ID: %s", ipaddr_string(pptr));
1770 break;
1771
1772 case TLV_IPADDR:
1773 while (tmp>0) {
1774 if (!TTEST2(*tptr, 4))
1775 goto trunctlv;
1776 printf("\n\t IPv4 interface address: %s", ipaddr_string(tptr));
1777 tptr += 4;
1778 tmp -= 4;
1779 }
1780 break;
1781
1782 case TLV_HOSTNAME:
1783 printf("\n\t Hostname: ");
1784 while (tmp>0) {
1785 if (!TTEST2(*tptr, 1))
1786 goto trunctlv;
1787 printf("%c",*tptr++);
1788 tmp--;
1789 }
1790 break;
1791
1792 case TLV_SHARED_RISK_GROUP:
1793 if (!TTEST2(*tptr, NODE_ID_LEN))
1794 goto trunctlv;
1795 printf("\n\t IS Neighbor: %s", isis_print_id(tptr, NODE_ID_LEN));
1796 tptr+=(NODE_ID_LEN);
1797 tmp-=(NODE_ID_LEN);
1798
1799 if (!TTEST2(*tptr, 1))
1800 goto trunctlv;
1801 printf(", %s", ISIS_MASK_TLV_SHARED_RISK_GROUP(*tptr++) ? "numbered" : "unnumbered");
1802 tmp--;
1803
1804 if (!TTEST2(*tptr,4))
1805 goto trunctlv;
1806 printf("\n\t IPv4 interface address: %s", ipaddr_string(tptr));
1807 tptr+=4;
1808 tmp-=4;
1809
1810 if (!TTEST2(*tptr,4))
1811 goto trunctlv;
1812 printf("\n\t IPv4 neighbor address: %s", ipaddr_string(tptr));
1813 tptr+=4;
1814 tmp-=4;
1815
1816 while (tmp>0) {
1817 if (!TTEST2(*tptr, 4))
1818 goto trunctlv;
1819 printf("\n\t Link-ID: 0x%08x", EXTRACT_32BITS(tptr));
1820 tptr+=4;
1821 tmp-=4;
1822 }
1823 break;
1824
1825 case TLV_LSP:
1826 tlv_lsp = (const struct isis_tlv_lsp *)tptr;
1827 while(tmp>0) {
1828 if (!TTEST((tlv_lsp->lsp_id)[LSP_ID_LEN]))
1829 goto trunctlv;
1830 printf("\n\t lsp-id: %s",
1831 isis_print_id(tlv_lsp->lsp_id, LSP_ID_LEN));
1832 if (!TTEST2(tlv_lsp->sequence_number, 4))
1833 goto trunctlv;
1834 printf(", seq: 0x%08x",EXTRACT_32BITS(tlv_lsp->sequence_number));
1835 if (!TTEST2(tlv_lsp->remaining_lifetime, 2))
1836 goto trunctlv;
1837 printf(", lifetime: %5ds",EXTRACT_16BITS(tlv_lsp->remaining_lifetime));
1838 if (!TTEST2(tlv_lsp->checksum, 2))
1839 goto trunctlv;
1840 printf(", chksum: 0x%04x",EXTRACT_16BITS(tlv_lsp->checksum));
1841 tmp-=sizeof(struct isis_tlv_lsp);
1842 tlv_lsp++;
1843 }
1844 break;
1845
1846 case TLV_CHECKSUM:
1847 if (!TTEST2(*tptr, 2))
1848 goto trunctlv;
1849 printf("\n\t checksum: 0x%04x (%s)",
1850 EXTRACT_16BITS(tptr),
1851 (osi_cksum(optr, length)) ? "incorrect" : "correct");
1852 break;
1853
1854 case TLV_MT_SUPPORTED:
1855 while (tmp>1) {
1856 /* length can only be a multiple of 2, otherwise there is
1857 something broken -> so decode down until length is 1 */
1858 if (tmp!=1) {
1859 mt_len = isis_print_mtid(tptr, "\n\t ");
1860 if (mt_len == 0) /* did something go wrong ? */
1861 goto trunctlv;
1862 tptr+=mt_len;
1863 tmp-=mt_len;
1864 } else {
1865 printf("\n\t malformed MT-ID");
1866 break;
1867 }
1868 }
1869 break;
1870
1871 case TLV_RESTART_SIGNALING:
1872 if (!TTEST2(*tptr, 3))
1873 goto trunctlv;
1874 printf("\n\t Flags [%s], Remaining holding time %us",
1875 bittok2str(isis_restart_flag_values, "none", *tptr),
1876 EXTRACT_16BITS(tptr+1));
1877 tptr+=3;
1878 break;
1879
1880 case TLV_IDRP_INFO:
1881 if (!TTEST2(*tptr, 1))
1882 goto trunctlv;
1883 printf("\n\t Inter-Domain Information Type: %s",
1884 tok2str(isis_subtlv_idrp_values,
1885 "Unknown (0x%02x)",
1886 *tptr));
1887 switch (*tptr++) {
1888 case SUBTLV_IDRP_ASN:
1889 if (!TTEST2(*tptr, 2)) /* fetch AS number */
1890 goto trunctlv;
1891 printf("AS Number: %u",EXTRACT_16BITS(tptr));
1892 break;
1893 case SUBTLV_IDRP_LOCAL:
1894 case SUBTLV_IDRP_RES:
1895 default:
1896 if(!print_unknown_data(tptr,"\n\t ",tlv_len-1))
1897 return(0);
1898 break;
1899 }
1900 break;
1901
1902 case TLV_LSP_BUFFERSIZE:
1903 if (!TTEST2(*tptr, 2))
1904 goto trunctlv;
1905 printf("\n\t LSP Buffersize: %u",EXTRACT_16BITS(tptr));
1906 break;
1907
1908 case TLV_PART_DIS:
1909 while (tmp >= SYSTEM_ID_LEN) {
1910 if (!TTEST2(*tptr, SYSTEM_ID_LEN))
1911 goto trunctlv;
1912 printf("\n\t %s",isis_print_id(tptr,SYSTEM_ID_LEN));
1913 tptr+=SYSTEM_ID_LEN;
1914 tmp-=SYSTEM_ID_LEN;
1915 }
1916 break;
1917
1918 case TLV_PREFIX_NEIGH:
1919 if (!TTEST2(*tptr, sizeof(struct isis_metric_block)))
1920 goto trunctlv;
1921 printf("\n\t Metric Block");
1922 isis_print_metric_block((const struct isis_metric_block *)tptr);
1923 tptr+=sizeof(struct isis_metric_block);
1924 tmp-=sizeof(struct isis_metric_block);
1925
1926 while(tmp>0) {
1927 if (!TTEST2(*tptr, 1))
1928 goto trunctlv;
1929 prefix_len=*tptr++; /* read out prefix length in semioctets*/
1930 tmp--;
1931 if (!TTEST2(*tptr, prefix_len/2))
1932 goto trunctlv;
1933 printf("\n\t\tAddress: %s/%u",
1934 print_nsap(tptr,prefix_len/2),
1935 prefix_len*4);
1936 tptr+=prefix_len/2;
1937 tmp-=prefix_len/2;
1938 }
1939 break;
1940
1941 case TLV_IIH_SEQNR:
1942 if (!TTEST2(*tptr, 4)) /* check if four bytes are on the wire */
1943 goto trunctlv;
1944 printf("\n\t Sequence number: %u", EXTRACT_32BITS(tptr) );
1945 break;
1946
1947 case TLV_VENDOR_PRIVATE:
1948 if (!TTEST2(*tptr, 3)) /* check if enough byte for a full oui */
1949 goto trunctlv;
1950 printf("\n\t Vendor OUI Code: 0x%06x", EXTRACT_24BITS(tptr) );
1951 tptr+=3;
1952 tmp-=3;
1953 if (tmp > 0) /* hexdump the rest */
1954 if(!print_unknown_data(tptr,"\n\t\t",tmp))
1955 return(0);
1956 break;
1957 /*
1958 * FIXME those are the defined TLVs that lack a decoder
1959 * you are welcome to contribute code ;-)
1960 */
1961
1962 case TLV_DECNET_PHASE4:
1963 case TLV_LUCENT_PRIVATE:
1964 case TLV_IPAUTH:
1965 case TLV_NORTEL_PRIVATE1:
1966 case TLV_NORTEL_PRIVATE2:
1967
1968 default:
1969 if (vflag <= 1) {
1970 if(!print_unknown_data(pptr,"\n\t\t",tlv_len))
1971 return(0);
1972 }
1973 break;
1974 }
1975 /* do we want to see an additionally hexdump ? */
1976 if (vflag> 1) {
1977 if(!print_unknown_data(pptr,"\n\t ",tlv_len))
1978 return(0);
1979 }
1980
1981 pptr += tlv_len;
1982 packet_len -= tlv_len;
1983 }
1984
1985 if (packet_len != 0) {
1986 printf("\n\t %u straggler bytes", packet_len);
1987 }
1988 return (1);
1989
1990 trunc:
1991 fputs("[|isis]", stdout);
1992 return (1);
1993
1994 trunctlv:
1995 printf("\n\t\t packet exceeded snapshot");
1996 return(1);
1997 }
1998
1999 /*
2000 * Verify the checksum. See 8473-1, Appendix C, section C.4.
2001 */
2002
2003 static int
2004 osi_cksum(const u_int8_t *tptr, u_int len)
2005 {
2006 int32_t c0 = 0, c1 = 0;
2007
2008 while ((int)--len >= 0) {
2009 c0 += *tptr++;
2010 c0 %= 255;
2011 c1 += c0;
2012 c1 %= 255;
2013 }
2014 return (c0 | c1);
2015 }
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