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Remove some now redundant ND_TCHECK_LEN(e, sizeof(nd_ipv6)) calls
[tcpdump] / print-ospf.c
1 /*
2 * Copyright (c) 1992, 1993, 1994, 1995, 1996, 1997
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 * OSPF support contributed by Jeffrey Honig (jch@mitchell.cit.cornell.edu)
22 */
23
24 /* \summary: Open Shortest Path First (OSPF) printer */
25
26 #ifdef HAVE_CONFIG_H
27 #include <config.h>
28 #endif
29
30 #include "netdissect-stdinc.h"
31
32 #include "netdissect.h"
33 #include "addrtoname.h"
34 #include "extract.h"
35 #include "gmpls.h"
36
37 #include "ospf.h"
38
39
40 static const struct tok ospf_option_values[] = {
41 { OSPF_OPTION_T, "MultiTopology" }, /* draft-ietf-ospf-mt-09 */
42 { OSPF_OPTION_E, "External" },
43 { OSPF_OPTION_MC, "Multicast" },
44 { OSPF_OPTION_NP, "NSSA" },
45 { OSPF_OPTION_L, "LLS" },
46 { OSPF_OPTION_DC, "Demand Circuit" },
47 { OSPF_OPTION_O, "Opaque" },
48 { OSPF_OPTION_DN, "Up/Down" },
49 { 0, NULL }
50 };
51
52 static const struct tok ospf_authtype_values[] = {
53 { OSPF_AUTH_NONE, "none" },
54 { OSPF_AUTH_SIMPLE, "simple" },
55 { OSPF_AUTH_MD5, "MD5" },
56 { 0, NULL }
57 };
58
59 static const struct tok ospf_rla_flag_values[] = {
60 { RLA_FLAG_B, "ABR" },
61 { RLA_FLAG_E, "ASBR" },
62 { RLA_FLAG_W1, "Virtual" },
63 { RLA_FLAG_W2, "W2" },
64 { 0, NULL }
65 };
66
67 static const struct tok type2str[] = {
68 { OSPF_TYPE_HELLO, "Hello" },
69 { OSPF_TYPE_DD, "Database Description" },
70 { OSPF_TYPE_LS_REQ, "LS-Request" },
71 { OSPF_TYPE_LS_UPDATE, "LS-Update" },
72 { OSPF_TYPE_LS_ACK, "LS-Ack" },
73 { 0, NULL }
74 };
75
76 static const struct tok lsa_values[] = {
77 { LS_TYPE_ROUTER, "Router" },
78 { LS_TYPE_NETWORK, "Network" },
79 { LS_TYPE_SUM_IP, "Summary" },
80 { LS_TYPE_SUM_ABR, "ASBR Summary" },
81 { LS_TYPE_ASE, "External" },
82 { LS_TYPE_GROUP, "Multicast Group" },
83 { LS_TYPE_NSSA, "NSSA" },
84 { LS_TYPE_OPAQUE_LL, "Link Local Opaque" },
85 { LS_TYPE_OPAQUE_AL, "Area Local Opaque" },
86 { LS_TYPE_OPAQUE_DW, "Domain Wide Opaque" },
87 { 0, NULL }
88 };
89
90 static const struct tok ospf_dd_flag_values[] = {
91 { OSPF_DB_INIT, "Init" },
92 { OSPF_DB_MORE, "More" },
93 { OSPF_DB_MASTER, "Master" },
94 { OSPF_DB_RESYNC, "OOBResync" },
95 { 0, NULL }
96 };
97
98 static const struct tok lsa_opaque_values[] = {
99 { LS_OPAQUE_TYPE_TE, "Traffic Engineering" },
100 { LS_OPAQUE_TYPE_GRACE, "Graceful restart" },
101 { LS_OPAQUE_TYPE_RI, "Router Information" },
102 { 0, NULL }
103 };
104
105 static const struct tok lsa_opaque_te_tlv_values[] = {
106 { LS_OPAQUE_TE_TLV_ROUTER, "Router Address" },
107 { LS_OPAQUE_TE_TLV_LINK, "Link" },
108 { 0, NULL }
109 };
110
111 static const struct tok lsa_opaque_te_link_tlv_subtlv_values[] = {
112 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE, "Link Type" },
113 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID, "Link ID" },
114 { LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP, "Local Interface IP address" },
115 { LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP, "Remote Interface IP address" },
116 { LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC, "Traffic Engineering Metric" },
117 { LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW, "Maximum Bandwidth" },
118 { LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW, "Maximum Reservable Bandwidth" },
119 { LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW, "Unreserved Bandwidth" },
120 { LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP, "Administrative Group" },
121 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" },
122 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE, "Link Protection Type" },
123 { LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR, "Interface Switching Capability" },
124 { LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP, "Shared Risk Link Group" },
125 { LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS, "Bandwidth Constraints" },
126 { 0, NULL }
127 };
128
129 static const struct tok lsa_opaque_grace_tlv_values[] = {
130 { LS_OPAQUE_GRACE_TLV_PERIOD, "Grace Period" },
131 { LS_OPAQUE_GRACE_TLV_REASON, "Graceful restart Reason" },
132 { LS_OPAQUE_GRACE_TLV_INT_ADDRESS, "IPv4 interface address" },
133 { 0, NULL }
134 };
135
136 static const struct tok lsa_opaque_grace_tlv_reason_values[] = {
137 { LS_OPAQUE_GRACE_TLV_REASON_UNKNOWN, "Unknown" },
138 { LS_OPAQUE_GRACE_TLV_REASON_SW_RESTART, "Software Restart" },
139 { LS_OPAQUE_GRACE_TLV_REASON_SW_UPGRADE, "Software Reload/Upgrade" },
140 { LS_OPAQUE_GRACE_TLV_REASON_CP_SWITCH, "Control Processor Switch" },
141 { 0, NULL }
142 };
143
144 static const struct tok lsa_opaque_te_tlv_link_type_sub_tlv_values[] = {
145 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_PTP, "Point-to-point" },
146 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_MA, "Multi-Access" },
147 { 0, NULL }
148 };
149
150 static const struct tok lsa_opaque_ri_tlv_values[] = {
151 { LS_OPAQUE_RI_TLV_CAP, "Router Capabilities" },
152 { 0, NULL }
153 };
154
155 static const struct tok lsa_opaque_ri_tlv_cap_values[] = {
156 { 1, "Reserved" },
157 { 2, "Reserved" },
158 { 4, "Reserved" },
159 { 8, "Reserved" },
160 { 16, "graceful restart capable" },
161 { 32, "graceful restart helper" },
162 { 64, "Stub router support" },
163 { 128, "Traffic engineering" },
164 { 256, "p2p over LAN" },
165 { 512, "path computation server" },
166 { 0, NULL }
167 };
168
169 static const struct tok ospf_lls_tlv_values[] = {
170 { OSPF_LLS_EO, "Extended Options" },
171 { OSPF_LLS_MD5, "MD5 Authentication" },
172 { 0, NULL }
173 };
174
175 static const struct tok ospf_lls_eo_options[] = {
176 { OSPF_LLS_EO_LR, "LSDB resync" },
177 { OSPF_LLS_EO_RS, "Restart" },
178 { 0, NULL }
179 };
180
181 int
182 ospf_grace_lsa_print(netdissect_options *ndo,
183 const u_char *tptr, u_int ls_length)
184 {
185 u_int tlv_type, tlv_length;
186
187
188 while (ls_length > 0) {
189 ND_TCHECK_4(tptr);
190 if (ls_length < 4) {
191 ND_PRINT("\n\t Remaining LS length %u < 4", ls_length);
192 return -1;
193 }
194 tlv_type = GET_BE_U_2(tptr);
195 tlv_length = GET_BE_U_2(tptr + 2);
196 tptr+=4;
197 ls_length-=4;
198
199 ND_PRINT("\n\t %s TLV (%u), length %u, value: ",
200 tok2str(lsa_opaque_grace_tlv_values,"unknown",tlv_type),
201 tlv_type,
202 tlv_length);
203
204 if (tlv_length > ls_length) {
205 ND_PRINT("\n\t Bogus length %u > %u", tlv_length,
206 ls_length);
207 return -1;
208 }
209
210 /* Infinite loop protection. */
211 if (tlv_type == 0 || tlv_length ==0) {
212 return -1;
213 }
214
215 ND_TCHECK_LEN(tptr, tlv_length);
216 switch(tlv_type) {
217
218 case LS_OPAQUE_GRACE_TLV_PERIOD:
219 if (tlv_length != 4) {
220 ND_PRINT("\n\t Bogus length %u != 4", tlv_length);
221 return -1;
222 }
223 ND_PRINT("%us", GET_BE_U_4(tptr));
224 break;
225
226 case LS_OPAQUE_GRACE_TLV_REASON:
227 if (tlv_length != 1) {
228 ND_PRINT("\n\t Bogus length %u != 1", tlv_length);
229 return -1;
230 }
231 ND_PRINT("%s (%u)",
232 tok2str(lsa_opaque_grace_tlv_reason_values, "Unknown", GET_U_1(tptr)),
233 GET_U_1(tptr));
234 break;
235
236 case LS_OPAQUE_GRACE_TLV_INT_ADDRESS:
237 if (tlv_length != 4) {
238 ND_PRINT("\n\t Bogus length %u != 4", tlv_length);
239 return -1;
240 }
241 ND_PRINT("%s", GET_IPADDR_STRING(tptr));
242 break;
243
244 default:
245 if (ndo->ndo_vflag <= 1) {
246 if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_length))
247 return -1;
248 }
249 break;
250
251 }
252 /* in OSPF everything has to be 32-bit aligned, including TLVs */
253 if (tlv_length%4 != 0)
254 tlv_length+=4-(tlv_length%4);
255 ls_length-=tlv_length;
256 tptr+=tlv_length;
257 }
258
259 return 0;
260 trunc:
261 return -1;
262 }
263
264 int
265 ospf_te_lsa_print(netdissect_options *ndo,
266 const u_char *tptr, u_int ls_length)
267 {
268 u_int tlv_type, tlv_length, subtlv_type, subtlv_length;
269 u_int priority_level, te_class, count_srlg;
270 union { /* int to float conversion buffer for several subTLVs */
271 float f;
272 uint32_t i;
273 } bw;
274
275 while (ls_length != 0) {
276 ND_TCHECK_4(tptr);
277 if (ls_length < 4) {
278 ND_PRINT("\n\t Remaining LS length %u < 4", ls_length);
279 return -1;
280 }
281 tlv_type = GET_BE_U_2(tptr);
282 tlv_length = GET_BE_U_2(tptr + 2);
283 tptr+=4;
284 ls_length-=4;
285
286 ND_PRINT("\n\t %s TLV (%u), length: %u",
287 tok2str(lsa_opaque_te_tlv_values,"unknown",tlv_type),
288 tlv_type,
289 tlv_length);
290
291 if (tlv_length > ls_length) {
292 ND_PRINT("\n\t Bogus length %u > %u", tlv_length,
293 ls_length);
294 return -1;
295 }
296
297 /* Infinite loop protection. */
298 if (tlv_type == 0 || tlv_length ==0) {
299 return -1;
300 }
301
302 switch(tlv_type) {
303 case LS_OPAQUE_TE_TLV_LINK:
304 while (tlv_length != 0) {
305 if (tlv_length < 4) {
306 ND_PRINT("\n\t Remaining TLV length %u < 4",
307 tlv_length);
308 return -1;
309 }
310 ND_TCHECK_4(tptr);
311 subtlv_type = GET_BE_U_2(tptr);
312 subtlv_length = GET_BE_U_2(tptr + 2);
313 tptr+=4;
314 tlv_length-=4;
315
316 /* Infinite loop protection */
317 if (subtlv_type == 0 || subtlv_length == 0)
318 goto invalid;
319
320 ND_PRINT("\n\t %s subTLV (%u), length: %u",
321 tok2str(lsa_opaque_te_link_tlv_subtlv_values,"unknown",subtlv_type),
322 subtlv_type,
323 subtlv_length);
324
325 if (tlv_length < subtlv_length) {
326 ND_PRINT("\n\t Remaining TLV length %u < %u",
327 tlv_length + 4, subtlv_length + 4);
328 return -1;
329 }
330 ND_TCHECK_LEN(tptr, subtlv_length);
331 switch(subtlv_type) {
332 case LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP:
333 if (subtlv_length != 4) {
334 ND_PRINT(" != 4");
335 goto invalid;
336 }
337 ND_PRINT(", 0x%08x", GET_BE_U_4(tptr));
338 break;
339 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID:
340 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID:
341 if (subtlv_length != 4 && subtlv_length != 8) {
342 ND_PRINT(" != 4 && != 8");
343 goto invalid;
344 }
345 ND_PRINT(", %s (0x%08x)",
346 GET_IPADDR_STRING(tptr),
347 GET_BE_U_4(tptr));
348 if (subtlv_length == 8) /* rfc4203 */
349 ND_PRINT(", %s (0x%08x)",
350 GET_IPADDR_STRING(tptr+4),
351 GET_BE_U_4(tptr + 4));
352 break;
353 case LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP:
354 case LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP:
355 if (subtlv_length != 4) {
356 ND_PRINT(" != 4");
357 goto invalid;
358 }
359 ND_PRINT(", %s", GET_IPADDR_STRING(tptr));
360 break;
361 case LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW:
362 case LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW:
363 if (subtlv_length != 4) {
364 ND_PRINT(" != 4");
365 goto invalid;
366 }
367 bw.i = GET_BE_U_4(tptr);
368 ND_PRINT(", %.3f Mbps", bw.f * 8 / 1000000);
369 break;
370 case LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW:
371 if (subtlv_length != 32) {
372 ND_PRINT(" != 32");
373 goto invalid;
374 }
375 for (te_class = 0; te_class < 8; te_class++) {
376 bw.i = GET_BE_U_4(tptr + te_class * 4);
377 ND_PRINT("\n\t\tTE-Class %u: %.3f Mbps",
378 te_class,
379 bw.f * 8 / 1000000);
380 }
381 break;
382 case LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS:
383 if (subtlv_length < 4) {
384 ND_PRINT(" < 4");
385 goto invalid;
386 }
387 /* BC Model Id (1 octet) + Reserved (3 octets) */
388 ND_PRINT("\n\t\tBandwidth Constraints Model ID: %s (%u)",
389 tok2str(diffserv_te_bc_values, "unknown", GET_U_1(tptr)),
390 GET_U_1(tptr));
391 if (subtlv_length % 4 != 0) {
392 ND_PRINT("\n\t\tlength %u != N x 4", subtlv_length);
393 goto invalid;
394 }
395 if (subtlv_length > 36) {
396 ND_PRINT("\n\t\tlength %u > 36", subtlv_length);
397 goto invalid;
398 }
399 /* decode BCs until the subTLV ends */
400 for (te_class = 0; te_class < (subtlv_length-4)/4; te_class++) {
401 bw.i = GET_BE_U_4(tptr + 4 + te_class * 4);
402 ND_PRINT("\n\t\t Bandwidth constraint CT%u: %.3f Mbps",
403 te_class,
404 bw.f * 8 / 1000000);
405 }
406 break;
407 case LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC:
408 if (subtlv_length != 4) {
409 ND_PRINT(" != 4");
410 goto invalid;
411 }
412 ND_PRINT(", Metric %u", GET_BE_U_4(tptr));
413 break;
414 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE:
415 /* Protection Cap (1 octet) + Reserved ((3 octets) */
416 if (subtlv_length != 4) {
417 ND_PRINT(" != 4");
418 goto invalid;
419 }
420 ND_PRINT(", %s",
421 bittok2str(gmpls_link_prot_values, "none", GET_U_1(tptr)));
422 break;
423 case LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR:
424 if (subtlv_length < 36) {
425 ND_PRINT(" < 36");
426 goto invalid;
427 }
428 /* Switching Cap (1 octet) + Encoding (1) + Reserved (2) */
429 ND_PRINT("\n\t\tInterface Switching Capability: %s",
430 tok2str(gmpls_switch_cap_values, "Unknown", GET_U_1((tptr))));
431 ND_PRINT("\n\t\tLSP Encoding: %s\n\t\tMax LSP Bandwidth:",
432 tok2str(gmpls_encoding_values, "Unknown", GET_U_1((tptr + 1))));
433 for (priority_level = 0; priority_level < 8; priority_level++) {
434 bw.i = GET_BE_U_4(tptr + 4 + (priority_level * 4));
435 ND_PRINT("\n\t\t priority level %u: %.3f Mbps",
436 priority_level,
437 bw.f * 8 / 1000000);
438 }
439 break;
440 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE:
441 if (subtlv_length != 1) {
442 ND_PRINT(" != 1");
443 goto invalid;
444 }
445 ND_PRINT(", %s (%u)",
446 tok2str(lsa_opaque_te_tlv_link_type_sub_tlv_values,"unknown",GET_U_1(tptr)),
447 GET_U_1(tptr));
448 break;
449
450 case LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP:
451 if (subtlv_length % 4 != 0) {
452 ND_PRINT(" != N x 4");
453 goto invalid;
454 }
455 count_srlg = subtlv_length / 4;
456 if (count_srlg != 0)
457 ND_PRINT("\n\t\t Shared risk group: ");
458 while (count_srlg > 0) {
459 bw.i = GET_BE_U_4(tptr);
460 ND_PRINT("%u", bw.i);
461 tptr+=4;
462 count_srlg--;
463 if (count_srlg > 0)
464 ND_PRINT(", ");
465 }
466 break;
467
468 default:
469 if (ndo->ndo_vflag <= 1) {
470 if (!print_unknown_data(ndo, tptr, "\n\t\t", subtlv_length))
471 return -1;
472 }
473 break;
474 }
475 /* in OSPF everything has to be 32-bit aligned, including subTLVs */
476 if (subtlv_length%4 != 0)
477 subtlv_length+=4-(subtlv_length%4);
478
479 if (tlv_length < subtlv_length) {
480 ND_PRINT("\n\t Remaining TLV length %u < %u",
481 tlv_length + 4, subtlv_length + 4);
482 return -1;
483 }
484 tlv_length-=subtlv_length;
485 tptr+=subtlv_length;
486
487 }
488 break;
489
490 case LS_OPAQUE_TE_TLV_ROUTER:
491 if (tlv_length < 4) {
492 ND_PRINT("\n\t TLV length %u < 4", tlv_length);
493 return -1;
494 }
495 ND_TCHECK_4(tptr);
496 ND_PRINT(", %s", GET_IPADDR_STRING(tptr));
497 break;
498
499 default:
500 if (ndo->ndo_vflag <= 1) {
501 if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_length))
502 return -1;
503 }
504 break;
505 }
506 /* in OSPF everything has to be 32-bit aligned, including TLVs */
507 if (tlv_length%4 != 0)
508 tlv_length+=4-(tlv_length%4);
509 if (tlv_length > ls_length) {
510 ND_PRINT("\n\t Bogus padded length %u > %u", tlv_length,
511 ls_length);
512 return -1;
513 }
514 ls_length-=tlv_length;
515 tptr+=tlv_length;
516 }
517 return 0;
518 trunc:
519 return -1;
520 invalid:
521 nd_print_invalid(ndo);
522 return -1;
523 }
524
525 static int
526 ospf_print_lshdr(netdissect_options *ndo,
527 const struct lsa_hdr *lshp)
528 {
529 u_int ls_type;
530 u_int ls_length;
531
532 ls_length = GET_BE_U_2(lshp->ls_length);
533 if (ls_length < sizeof(struct lsa_hdr)) {
534 ND_PRINT("\n\t Bogus length %u < header (%zu)", ls_length,
535 sizeof(struct lsa_hdr));
536 return(-1);
537 }
538 ND_PRINT("\n\t Advertising Router %s, seq 0x%08x, age %us, length %u",
539 GET_IPADDR_STRING(lshp->ls_router),
540 GET_BE_U_4(lshp->ls_seq),
541 GET_BE_U_2(lshp->ls_age),
542 ls_length - (u_int)sizeof(struct lsa_hdr));
543 ls_type = GET_U_1(lshp->ls_type);
544 switch (ls_type) {
545 /* the LSA header for opaque LSAs was slightly changed */
546 case LS_TYPE_OPAQUE_LL:
547 case LS_TYPE_OPAQUE_AL:
548 case LS_TYPE_OPAQUE_DW:
549 ND_PRINT("\n\t %s LSA (%u), Opaque-Type %s LSA (%u), Opaque-ID %u",
550 tok2str(lsa_values,"unknown",ls_type),
551 ls_type,
552
553 tok2str(lsa_opaque_values,
554 "unknown",
555 GET_U_1(lshp->un_lsa_id.opaque_field.opaque_type)),
556 GET_U_1(lshp->un_lsa_id.opaque_field.opaque_type),
557 GET_BE_U_3(lshp->un_lsa_id.opaque_field.opaque_id)
558
559 );
560 break;
561
562 /* all other LSA types use regular style LSA headers */
563 default:
564 ND_PRINT("\n\t %s LSA (%u), LSA-ID: %s",
565 tok2str(lsa_values,"unknown",ls_type),
566 ls_type,
567 GET_IPADDR_STRING(lshp->un_lsa_id.lsa_id));
568 break;
569 }
570 ND_PRINT("\n\t Options: [%s]",
571 bittok2str(ospf_option_values, "none", GET_U_1(lshp->ls_options)));
572
573 return (ls_length);
574 }
575
576 /* draft-ietf-ospf-mt-09 */
577 static const struct tok ospf_topology_values[] = {
578 { 0, "default" },
579 { 1, "multicast" },
580 { 2, "management" },
581 { 0, NULL }
582 };
583
584 /*
585 * Print all the per-topology metrics.
586 */
587 static int
588 ospf_print_tos_metrics(netdissect_options *ndo,
589 const union un_tos *tos)
590 {
591 u_int metric_count;
592 u_int toscount;
593 u_int tos_type;
594
595 toscount = GET_U_1(tos->link.link_tos_count)+1;
596 metric_count = 0;
597
598 /*
599 * All but the first metric contain a valid topology id.
600 */
601 while (toscount != 0) {
602 ND_TCHECK_SIZE(tos);
603 tos_type = GET_U_1(tos->metrics.tos_type);
604 ND_PRINT("\n\t\ttopology %s (%u), metric %u",
605 tok2str(ospf_topology_values, "Unknown",
606 metric_count ? tos_type : 0),
607 metric_count ? tos_type : 0,
608 GET_BE_U_2(tos->metrics.tos_metric));
609 metric_count++;
610 tos++;
611 toscount--;
612 }
613 return 0;
614 trunc:
615 return 1;
616 }
617
618 /*
619 * Print a single link state advertisement. If truncated or if LSA length
620 * field is less than the length of the LSA header, return NULl, else
621 * return pointer to data past end of LSA.
622 */
623 static const uint8_t *
624 ospf_print_lsa(netdissect_options *ndo,
625 const struct lsa *lsap)
626 {
627 const uint8_t *ls_end;
628 const struct rlalink *rlp;
629 const nd_ipv4 *ap;
630 const struct aslametric *almp;
631 const struct mcla *mcp;
632 const uint8_t *lp;
633 u_int tlv_type, tlv_length, rla_count, topology;
634 int ospf_print_lshdr_ret;
635 u_int ls_length;
636 const uint8_t *tptr;
637
638 tptr = (const uint8_t *)lsap->lsa_un.un_unknown; /* squelch compiler warnings */
639 ospf_print_lshdr_ret = ospf_print_lshdr(ndo, &lsap->ls_hdr);
640 if (ospf_print_lshdr_ret < 0)
641 return(NULL);
642 ls_length = (u_int)ospf_print_lshdr_ret;
643 ls_end = (const uint8_t *)lsap + ls_length;
644 /*
645 * ospf_print_lshdr() returns -1 if the length is too short,
646 * so we know ls_length is >= sizeof(struct lsa_hdr).
647 */
648 ls_length -= sizeof(struct lsa_hdr);
649
650 switch (GET_U_1(lsap->ls_hdr.ls_type)) {
651
652 case LS_TYPE_ROUTER:
653 ND_PRINT("\n\t Router LSA Options: [%s]",
654 bittok2str(ospf_rla_flag_values, "none", GET_U_1(lsap->lsa_un.un_rla.rla_flags)));
655
656 rla_count = GET_BE_U_2(lsap->lsa_un.un_rla.rla_count);
657 ND_TCHECK_SIZE(lsap->lsa_un.un_rla.rla_link);
658 rlp = lsap->lsa_un.un_rla.rla_link;
659 for (u_int i = rla_count; i != 0; i--) {
660 ND_TCHECK_SIZE(rlp);
661 switch (GET_U_1(rlp->un_tos.link.link_type)) {
662
663 case RLA_TYPE_VIRTUAL:
664 ND_PRINT("\n\t Virtual Link: Neighbor Router-ID: %s, Interface Address: %s",
665 GET_IPADDR_STRING(rlp->link_id),
666 GET_IPADDR_STRING(rlp->link_data));
667 break;
668
669 case RLA_TYPE_ROUTER:
670 ND_PRINT("\n\t Neighbor Router-ID: %s, Interface Address: %s",
671 GET_IPADDR_STRING(rlp->link_id),
672 GET_IPADDR_STRING(rlp->link_data));
673 break;
674
675 case RLA_TYPE_TRANSIT:
676 ND_PRINT("\n\t Neighbor Network-ID: %s, Interface Address: %s",
677 GET_IPADDR_STRING(rlp->link_id),
678 GET_IPADDR_STRING(rlp->link_data));
679 break;
680
681 case RLA_TYPE_STUB:
682 ND_PRINT("\n\t Stub Network: %s, Mask: %s",
683 GET_IPADDR_STRING(rlp->link_id),
684 GET_IPADDR_STRING(rlp->link_data));
685 break;
686
687 default:
688 ND_PRINT("\n\t Unknown Router Link Type (%u)",
689 GET_U_1(rlp->un_tos.link.link_type));
690 return (ls_end);
691 }
692
693 if (ospf_print_tos_metrics(ndo, &rlp->un_tos))
694 goto trunc;
695
696 rlp = (const struct rlalink *)((const u_char *)(rlp + 1) +
697 (GET_U_1(rlp->un_tos.link.link_tos_count) * sizeof(union un_tos)));
698 }
699 break;
700
701 case LS_TYPE_NETWORK:
702 ND_TCHECK_4(lsap->lsa_un.un_nla.nla_mask);
703 ND_PRINT("\n\t Mask %s\n\t Connected Routers:",
704 GET_IPADDR_STRING(lsap->lsa_un.un_nla.nla_mask));
705 ap = lsap->lsa_un.un_nla.nla_router;
706 while ((const u_char *)ap < ls_end) {
707 ND_TCHECK_SIZE(ap);
708 ND_PRINT("\n\t %s", GET_IPADDR_STRING(*ap));
709 ++ap;
710 }
711 break;
712
713 case LS_TYPE_SUM_IP:
714 ND_TCHECK_4(lsap->lsa_un.un_nla.nla_mask);
715 ND_PRINT("\n\t Mask %s",
716 GET_IPADDR_STRING(lsap->lsa_un.un_sla.sla_mask));
717 ND_TCHECK_SIZE(lsap->lsa_un.un_sla.sla_tosmetric);
718 lp = (const uint8_t *)lsap->lsa_un.un_sla.sla_tosmetric;
719 while (lp < ls_end) {
720 uint32_t ul;
721
722 ul = GET_BE_U_4(lp);
723 topology = (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS;
724 ND_PRINT("\n\t\ttopology %s (%u) metric %u",
725 tok2str(ospf_topology_values, "Unknown", topology),
726 topology,
727 ul & SLA_MASK_METRIC);
728 lp += 4;
729 }
730 break;
731
732 case LS_TYPE_SUM_ABR:
733 ND_TCHECK_SIZE(lsap->lsa_un.un_sla.sla_tosmetric);
734 lp = (const uint8_t *)lsap->lsa_un.un_sla.sla_tosmetric;
735 while (lp < ls_end) {
736 uint32_t ul;
737
738 ul = GET_BE_U_4(lp);
739 topology = (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS;
740 ND_PRINT("\n\t\ttopology %s (%u) metric %u",
741 tok2str(ospf_topology_values, "Unknown", topology),
742 topology,
743 ul & SLA_MASK_METRIC);
744 lp += 4;
745 }
746 break;
747
748 case LS_TYPE_ASE:
749 case LS_TYPE_NSSA: /* fall through - those LSAs share the same format */
750 ND_TCHECK_4(lsap->lsa_un.un_nla.nla_mask);
751 ND_PRINT("\n\t Mask %s",
752 GET_IPADDR_STRING(lsap->lsa_un.un_asla.asla_mask));
753
754 ND_TCHECK_SIZE(lsap->lsa_un.un_sla.sla_tosmetric);
755 almp = lsap->lsa_un.un_asla.asla_metric;
756 while ((const u_char *)almp < ls_end) {
757 uint32_t ul;
758
759 ul = GET_BE_U_4(almp->asla_tosmetric);
760 topology = ((ul & ASLA_MASK_TOS) >> ASLA_SHIFT_TOS);
761 ND_PRINT("\n\t\ttopology %s (%u), type %u, metric",
762 tok2str(ospf_topology_values, "Unknown", topology),
763 topology,
764 (ul & ASLA_FLAG_EXTERNAL) ? 2 : 1);
765 if ((ul & ASLA_MASK_METRIC) == 0xffffff)
766 ND_PRINT(" infinite");
767 else
768 ND_PRINT(" %u", (ul & ASLA_MASK_METRIC));
769
770 ND_TCHECK_4(almp->asla_forward);
771 if (GET_IPV4_TO_NETWORK_ORDER(almp->asla_forward) != 0) {
772 ND_PRINT(", forward %s", GET_IPADDR_STRING(almp->asla_forward));
773 }
774 ND_TCHECK_4(almp->asla_tag);
775 if (GET_IPV4_TO_NETWORK_ORDER(almp->asla_tag) != 0) {
776 ND_PRINT(", tag %s", GET_IPADDR_STRING(almp->asla_tag));
777 }
778 ++almp;
779 }
780 break;
781
782 case LS_TYPE_GROUP:
783 /* Multicast extensions as of 23 July 1991 */
784 mcp = lsap->lsa_un.un_mcla;
785 while ((const u_char *)mcp < ls_end) {
786 ND_TCHECK_4(mcp->mcla_vid);
787 switch (GET_BE_U_4(mcp->mcla_vtype)) {
788
789 case MCLA_VERTEX_ROUTER:
790 ND_PRINT("\n\t Router Router-ID %s",
791 GET_IPADDR_STRING(mcp->mcla_vid));
792 break;
793
794 case MCLA_VERTEX_NETWORK:
795 ND_PRINT("\n\t Network Designated Router %s",
796 GET_IPADDR_STRING(mcp->mcla_vid));
797 break;
798
799 default:
800 ND_PRINT("\n\t unknown VertexType (%u)",
801 GET_BE_U_4(mcp->mcla_vtype));
802 break;
803 }
804 ++mcp;
805 }
806 break;
807
808 case LS_TYPE_OPAQUE_LL: /* fall through */
809 case LS_TYPE_OPAQUE_AL:
810 case LS_TYPE_OPAQUE_DW:
811
812 switch (GET_U_1(lsap->ls_hdr.un_lsa_id.opaque_field.opaque_type)) {
813 case LS_OPAQUE_TYPE_RI:
814 tptr = (const uint8_t *)(lsap->lsa_un.un_ri_tlv);
815
816 u_int ls_length_remaining = ls_length;
817 while (ls_length_remaining != 0) {
818 ND_TCHECK_4(tptr);
819 if (ls_length_remaining < 4) {
820 ND_PRINT("\n\t Remaining LS length %u < 4", ls_length_remaining);
821 return(ls_end);
822 }
823 tlv_type = GET_BE_U_2(tptr);
824 tlv_length = GET_BE_U_2(tptr + 2);
825 tptr+=4;
826 ls_length_remaining-=4;
827
828 ND_PRINT("\n\t %s TLV (%u), length: %u, value: ",
829 tok2str(lsa_opaque_ri_tlv_values,"unknown",tlv_type),
830 tlv_type,
831 tlv_length);
832
833 if (tlv_length > ls_length_remaining) {
834 ND_PRINT("\n\t Bogus length %u > remaining LS length %u", tlv_length,
835 ls_length_remaining);
836 return(ls_end);
837 }
838 ND_TCHECK_LEN(tptr, tlv_length);
839 switch(tlv_type) {
840
841 case LS_OPAQUE_RI_TLV_CAP:
842 if (tlv_length != 4) {
843 ND_PRINT("\n\t Bogus length %u != 4", tlv_length);
844 return(ls_end);
845 }
846 ND_PRINT("Capabilities: %s",
847 bittok2str(lsa_opaque_ri_tlv_cap_values, "Unknown", GET_BE_U_4(tptr)));
848 break;
849 default:
850 if (ndo->ndo_vflag <= 1) {
851 if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_length))
852 return(ls_end);
853 }
854 break;
855
856 }
857 tptr+=tlv_length;
858 ls_length_remaining-=tlv_length;
859 }
860 break;
861
862 case LS_OPAQUE_TYPE_GRACE:
863 if (ospf_grace_lsa_print(ndo, (const u_char *)(lsap->lsa_un.un_grace_tlv),
864 ls_length) == -1) {
865 return(ls_end);
866 }
867 break;
868
869 case LS_OPAQUE_TYPE_TE:
870 if (ospf_te_lsa_print(ndo, (const u_char *)(lsap->lsa_un.un_te_lsa_tlv),
871 ls_length) == -1) {
872 return(ls_end);
873 }
874 break;
875
876 default:
877 if (ndo->ndo_vflag <= 1) {
878 if (!print_unknown_data(ndo, (const uint8_t *)lsap->lsa_un.un_unknown,
879 "\n\t ", ls_length))
880 return(ls_end);
881 }
882 break;
883 }
884 }
885
886 /* do we want to see an additionally hexdump ? */
887 if (ndo->ndo_vflag> 1)
888 if (!print_unknown_data(ndo, (const uint8_t *)lsap->lsa_un.un_unknown,
889 "\n\t ", ls_length)) {
890 return(ls_end);
891 }
892
893 return (ls_end);
894 trunc:
895 return (NULL);
896 }
897
898 static int
899 ospf_decode_lls(netdissect_options *ndo,
900 const struct ospfhdr *op, u_int length)
901 {
902 const u_char *dptr;
903 const u_char *dataend;
904 u_int length2;
905 uint16_t lls_type, lls_len;
906 uint32_t lls_flags;
907
908 switch (GET_U_1(op->ospf_type)) {
909
910 case OSPF_TYPE_HELLO:
911 if (!(GET_U_1(op->ospf_hello.hello_options) & OSPF_OPTION_L))
912 return (0);
913 break;
914
915 case OSPF_TYPE_DD:
916 if (!(GET_U_1(op->ospf_db.db_options) & OSPF_OPTION_L))
917 return (0);
918 break;
919
920 default:
921 return (0);
922 }
923
924 /* dig deeper if LLS data is available; see RFC4813 */
925 length2 = GET_BE_U_2(op->ospf_len);
926 dptr = (const u_char *)op + length2;
927 dataend = (const u_char *)op + length;
928
929 if (GET_BE_U_2(op->ospf_authtype) == OSPF_AUTH_MD5) {
930 dptr = dptr + op->ospf_authdata[3];
931 length2 += op->ospf_authdata[3];
932 }
933 if (length2 >= length) {
934 ND_PRINT("\n\t[LLS truncated]");
935 return (1);
936 }
937 ND_PRINT("\n\t LLS: checksum: 0x%04x", (u_int) GET_BE_U_2(dptr));
938
939 dptr += 2;
940 length2 = GET_BE_U_2(dptr);
941 ND_PRINT(", length: %u", length2);
942
943 dptr += 2;
944 ND_TCHECK_1(dptr);
945 while (dptr < dataend) {
946 lls_type = GET_BE_U_2(dptr);
947 ND_PRINT("\n\t %s (%u)",
948 tok2str(ospf_lls_tlv_values,"Unknown TLV",lls_type),
949 lls_type);
950 dptr += 2;
951 lls_len = GET_BE_U_2(dptr);
952 ND_PRINT(", length: %u", lls_len);
953 dptr += 2;
954 switch (lls_type) {
955
956 case OSPF_LLS_EO:
957 if (lls_len != 4) {
958 ND_PRINT(" [should be 4]");
959 lls_len = 4;
960 }
961 lls_flags = GET_BE_U_4(dptr);
962 ND_PRINT("\n\t Options: 0x%08x [%s]", lls_flags,
963 bittok2str(ospf_lls_eo_options, "?", lls_flags));
964
965 break;
966
967 case OSPF_LLS_MD5:
968 if (lls_len != 20) {
969 ND_PRINT(" [should be 20]");
970 lls_len = 20;
971 }
972 ND_PRINT("\n\t Sequence number: 0x%08x", GET_BE_U_4(dptr));
973 break;
974 }
975
976 dptr += lls_len;
977 }
978
979 return (0);
980 trunc:
981 return (1);
982 }
983
984 static int
985 ospf_decode_v2(netdissect_options *ndo,
986 const struct ospfhdr *op, const u_char *dataend)
987 {
988 const nd_ipv4 *ap;
989 const struct lsr *lsrp;
990 const struct lsa_hdr *lshp;
991 const struct lsa *lsap;
992 uint32_t lsa_count,lsa_count_max;
993
994 switch (GET_U_1(op->ospf_type)) {
995
996 case OSPF_TYPE_HELLO:
997 ND_PRINT("\n\tOptions [%s]",
998 bittok2str(ospf_option_values,"none",GET_U_1(op->ospf_hello.hello_options)));
999
1000 ND_PRINT("\n\t Hello Timer %us, Dead Timer %us, Mask %s, Priority %u",
1001 GET_BE_U_2(op->ospf_hello.hello_helloint),
1002 GET_BE_U_4(op->ospf_hello.hello_deadint),
1003 GET_IPADDR_STRING(op->ospf_hello.hello_mask),
1004 GET_U_1(op->ospf_hello.hello_priority));
1005
1006 ND_TCHECK_4(op->ospf_hello.hello_dr);
1007 if (GET_IPV4_TO_NETWORK_ORDER(op->ospf_hello.hello_dr) != 0)
1008 ND_PRINT("\n\t Designated Router %s",
1009 GET_IPADDR_STRING(op->ospf_hello.hello_dr));
1010
1011 ND_TCHECK_4(op->ospf_hello.hello_bdr);
1012 if (GET_IPV4_TO_NETWORK_ORDER(op->ospf_hello.hello_bdr) != 0)
1013 ND_PRINT(", Backup Designated Router %s",
1014 GET_IPADDR_STRING(op->ospf_hello.hello_bdr));
1015
1016 ap = op->ospf_hello.hello_neighbor;
1017 if ((const u_char *)ap < dataend)
1018 ND_PRINT("\n\t Neighbor List:");
1019 while ((const u_char *)ap < dataend) {
1020 ND_TCHECK_SIZE(ap);
1021 ND_PRINT("\n\t %s", GET_IPADDR_STRING(*ap));
1022 ++ap;
1023 }
1024 break; /* HELLO */
1025
1026 case OSPF_TYPE_DD:
1027 ND_PRINT("\n\tOptions [%s]",
1028 bittok2str(ospf_option_values, "none", GET_U_1(op->ospf_db.db_options)));
1029 ND_PRINT(", DD Flags [%s]",
1030 bittok2str(ospf_dd_flag_values, "none", GET_U_1(op->ospf_db.db_flags)));
1031 if (GET_BE_U_2(op->ospf_db.db_ifmtu)) {
1032 ND_PRINT(", MTU: %u",
1033 GET_BE_U_2(op->ospf_db.db_ifmtu));
1034 }
1035 ND_PRINT(", Sequence: 0x%08x", GET_BE_U_4(op->ospf_db.db_seq));
1036
1037 /* Print all the LS adv's */
1038 lshp = op->ospf_db.db_lshdr;
1039 while (((const u_char *)lshp < dataend) && ospf_print_lshdr(ndo, lshp) != -1) {
1040 ++lshp;
1041 }
1042 break;
1043
1044 case OSPF_TYPE_LS_REQ:
1045 lsrp = op->ospf_lsr;
1046 while ((const u_char *)lsrp < dataend) {
1047 ND_TCHECK_SIZE(lsrp);
1048
1049 ND_PRINT("\n\t Advertising Router: %s, %s LSA (%u)",
1050 GET_IPADDR_STRING(lsrp->ls_router),
1051 tok2str(lsa_values,"unknown",GET_BE_U_4(lsrp->ls_type)),
1052 GET_BE_U_4(lsrp->ls_type));
1053
1054 switch (GET_BE_U_4(lsrp->ls_type)) {
1055 /* the LSA header for opaque LSAs was slightly changed */
1056 case LS_TYPE_OPAQUE_LL:
1057 case LS_TYPE_OPAQUE_AL:
1058 case LS_TYPE_OPAQUE_DW:
1059 ND_PRINT(", Opaque-Type: %s LSA (%u), Opaque-ID: %u",
1060 tok2str(lsa_opaque_values, "unknown",GET_U_1(lsrp->un_ls_stateid.opaque_field.opaque_type)),
1061 GET_U_1(lsrp->un_ls_stateid.opaque_field.opaque_type),
1062 GET_BE_U_3(lsrp->un_ls_stateid.opaque_field.opaque_id));
1063 break;
1064 default:
1065 ND_PRINT(", LSA-ID: %s",
1066 GET_IPADDR_STRING(lsrp->un_ls_stateid.ls_stateid));
1067 break;
1068 }
1069
1070 ++lsrp;
1071 }
1072 break;
1073
1074 case OSPF_TYPE_LS_UPDATE:
1075 lsap = op->ospf_lsu.lsu_lsa;
1076 lsa_count_max = GET_BE_U_4(op->ospf_lsu.lsu_count);
1077 ND_PRINT(", %u LSA%s", lsa_count_max, PLURAL_SUFFIX(lsa_count_max));
1078 for (lsa_count=1;lsa_count <= lsa_count_max;lsa_count++) {
1079 ND_PRINT("\n\t LSA #%u", lsa_count);
1080 lsap = (const struct lsa *)ospf_print_lsa(ndo, lsap);
1081 if (lsap == NULL)
1082 goto trunc;
1083 }
1084 break;
1085
1086 case OSPF_TYPE_LS_ACK:
1087 lshp = op->ospf_lsa.lsa_lshdr;
1088 while (ospf_print_lshdr(ndo, lshp) != -1) {
1089 ++lshp;
1090 }
1091 break;
1092
1093 default:
1094 break;
1095 }
1096 return (0);
1097 trunc:
1098 return (1);
1099 }
1100
1101 void
1102 ospf_print(netdissect_options *ndo,
1103 const u_char *bp, u_int length,
1104 const u_char *bp2 _U_)
1105 {
1106 const struct ospfhdr *op;
1107 const u_char *dataend;
1108 const char *cp;
1109
1110 ndo->ndo_protocol = "ospf2";
1111 op = (const struct ospfhdr *)bp;
1112
1113 /* XXX Before we do anything else, strip off the MD5 trailer */
1114 if (GET_BE_U_2(op->ospf_authtype) == OSPF_AUTH_MD5) {
1115 length -= OSPF_AUTH_MD5_LEN;
1116 ndo->ndo_snapend -= OSPF_AUTH_MD5_LEN;
1117 }
1118
1119 /* If the type is valid translate it, or just print the type */
1120 /* value. If it's not valid, say so and return */
1121 cp = tok2str(type2str, "unknown LS-type %u", GET_U_1(op->ospf_type));
1122 ND_PRINT("OSPFv%u, %s, length %u", GET_U_1(op->ospf_version), cp,
1123 length);
1124 if (*cp == 'u')
1125 return;
1126
1127 if (!ndo->ndo_vflag) { /* non verbose - so lets bail out here */
1128 return;
1129 }
1130
1131 if (length != GET_BE_U_2(op->ospf_len)) {
1132 ND_PRINT(" [len %u]", GET_BE_U_2(op->ospf_len));
1133 }
1134
1135 if (length > GET_BE_U_2(op->ospf_len)) {
1136 dataend = bp + GET_BE_U_2(op->ospf_len);
1137 } else {
1138 dataend = bp + length;
1139 }
1140
1141 ND_TCHECK_4(op->ospf_routerid);
1142 ND_PRINT("\n\tRouter-ID %s", GET_IPADDR_STRING(op->ospf_routerid));
1143
1144 ND_TCHECK_4(op->ospf_areaid);
1145 if (GET_IPV4_TO_NETWORK_ORDER(op->ospf_areaid) != 0)
1146 ND_PRINT(", Area %s", GET_IPADDR_STRING(op->ospf_areaid));
1147 else
1148 ND_PRINT(", Backbone Area");
1149
1150 if (ndo->ndo_vflag) {
1151 /* Print authentication data (should we really do this?) */
1152 ND_TCHECK_LEN(op->ospf_authdata, sizeof(op->ospf_authdata));
1153
1154 ND_PRINT(", Authentication Type: %s (%u)",
1155 tok2str(ospf_authtype_values, "unknown", GET_BE_U_2(op->ospf_authtype)),
1156 GET_BE_U_2(op->ospf_authtype));
1157
1158 switch (GET_BE_U_2(op->ospf_authtype)) {
1159
1160 case OSPF_AUTH_NONE:
1161 break;
1162
1163 case OSPF_AUTH_SIMPLE:
1164 ND_PRINT("\n\tSimple text password: ");
1165 (void)nd_printzp(ndo, op->ospf_authdata, OSPF_AUTH_SIMPLE_LEN, NULL);
1166 break;
1167
1168 case OSPF_AUTH_MD5:
1169 ND_PRINT("\n\tKey-ID: %u, Auth-Length: %u, Crypto Sequence Number: 0x%08x",
1170 *((op->ospf_authdata) + 2),
1171 *((op->ospf_authdata) + 3),
1172 GET_BE_U_4((op->ospf_authdata) + 4));
1173 break;
1174
1175 default:
1176 return;
1177 }
1178 }
1179 /* Do rest according to version. */
1180 switch (GET_U_1(op->ospf_version)) {
1181
1182 case 2:
1183 /* ospf version 2 */
1184 if (ospf_decode_v2(ndo, op, dataend))
1185 goto trunc;
1186 if (length > GET_BE_U_2(op->ospf_len)) {
1187 if (ospf_decode_lls(ndo, op, length))
1188 goto trunc;
1189 }
1190 break;
1191
1192 default:
1193 ND_PRINT(" ospf [version %u]", GET_U_1(op->ospf_version));
1194 break;
1195 } /* end switch on version */
1196
1197 return;
1198 trunc:
1199 nd_print_trunc(ndo);
1200 }
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