• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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 #ifndef lint
25 static const char rcsid[] _U_ =
26     "@(#) $Header: /tcpdump/master/tcpdump/print-ospf.c,v 1.56.2.4 2006/12/13 08:24:27 hannes Exp $ (LBL)";
27 #endif
28 
29 #ifdef HAVE_CONFIG_H
30 #include "config.h"
31 #endif
32 
33 #include <tcpdump-stdinc.h>
34 
35 #include <stdio.h>
36 
37 #include "interface.h"
38 #include "addrtoname.h"
39 #include "extract.h"
40 #include "gmpls.h"
41 
42 #include "ospf.h"
43 
44 #include "ip.h"
45 
46 static struct tok ospf_option_values[] = {
47 	{ OSPF_OPTION_T,	"TOS" },
48 	{ OSPF_OPTION_E,	"External" },
49 	{ OSPF_OPTION_MC,	"Multicast" },
50 	{ OSPF_OPTION_NP,	"NSSA" },
51 	{ OSPF_OPTION_EA,	"Advertise External" },
52 	{ OSPF_OPTION_DC,	"Demand Circuit" },
53 	{ OSPF_OPTION_O,	"Opaque" },
54 	{ OSPF_OPTION_DN,	"Up/Down" },
55 	{ 0,			NULL }
56 };
57 
58 static struct tok ospf_authtype_values[] = {
59 	{ OSPF_AUTH_NONE,	"none" },
60 	{ OSPF_AUTH_SIMPLE,	"simple" },
61 	{ OSPF_AUTH_MD5,	"MD5" },
62 	{ 0,			NULL }
63 };
64 
65 static struct tok ospf_rla_flag_values[] = {
66 	{ RLA_FLAG_B,		"ABR" },
67 	{ RLA_FLAG_E,		"ASBR" },
68 	{ RLA_FLAG_W1,		"Virtual" },
69 	{ RLA_FLAG_W2,		"W2" },
70 	{ 0,			NULL }
71 };
72 
73 static struct tok type2str[] = {
74 	{ OSPF_TYPE_UMD,	"UMD" },
75 	{ OSPF_TYPE_HELLO,	"Hello" },
76 	{ OSPF_TYPE_DD,		"Database Description" },
77 	{ OSPF_TYPE_LS_REQ,	"LS-Request" },
78 	{ OSPF_TYPE_LS_UPDATE,	"LS-Update" },
79 	{ OSPF_TYPE_LS_ACK,	"LS-Ack" },
80 	{ 0,			NULL }
81 };
82 
83 static struct tok lsa_values[] = {
84 	{ LS_TYPE_ROUTER,       "Router" },
85 	{ LS_TYPE_NETWORK,      "Network" },
86 	{ LS_TYPE_SUM_IP,       "Summary" },
87 	{ LS_TYPE_SUM_ABR,      "ASBR Summary" },
88 	{ LS_TYPE_ASE,          "External" },
89 	{ LS_TYPE_GROUP,        "Multicast Group" },
90 	{ LS_TYPE_NSSA,         "NSSA" },
91 	{ LS_TYPE_OPAQUE_LL,    "Link Local Opaque" },
92 	{ LS_TYPE_OPAQUE_AL,    "Area Local Opaque" },
93 	{ LS_TYPE_OPAQUE_DW,    "Domain Wide Opaque" },
94 	{ 0,			NULL }
95 };
96 
97 static struct tok ospf_dd_flag_values[] = {
98 	{ OSPF_DB_INIT,	        "Init" },
99 	{ OSPF_DB_MORE,	        "More" },
100 	{ OSPF_DB_MASTER,	"Master" },
101 	{ 0,			NULL }
102 };
103 
104 static struct tok lsa_opaque_values[] = {
105 	{ LS_OPAQUE_TYPE_TE,    "Traffic Engineering" },
106 	{ LS_OPAQUE_TYPE_GRACE, "Graceful restart" },
107 	{ LS_OPAQUE_TYPE_RI,    "Router Information" },
108 	{ 0,			NULL }
109 };
110 
111 static struct tok lsa_opaque_te_tlv_values[] = {
112 	{ LS_OPAQUE_TE_TLV_ROUTER, "Router Address" },
113 	{ LS_OPAQUE_TE_TLV_LINK,   "Link" },
114 	{ 0,			NULL }
115 };
116 
117 static struct tok lsa_opaque_te_link_tlv_subtlv_values[] = {
118 	{ LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE,            "Link Type" },
119 	{ LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID,              "Link ID" },
120 	{ LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP,             "Local Interface IP address" },
121 	{ LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP,            "Remote Interface IP address" },
122 	{ LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC,            "Traffic Engineering Metric" },
123 	{ LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW,               "Maximum Bandwidth" },
124 	{ LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW,           "Maximum Reservable Bandwidth" },
125 	{ LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW,             "Unreserved Bandwidth" },
126 	{ LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP,          "Administrative Group" },
127 	{ LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" },
128 	{ LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE, "Link Protection Type" },
129 	{ LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR,    "Interface Switching Capability" },
130 	{ LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP,    "Shared Risk Link Group" },
131 	{ LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS,       "Bandwidth Constraints" },
132 	{ 0,			NULL }
133 };
134 
135 static struct tok lsa_opaque_grace_tlv_values[] = {
136 	{ LS_OPAQUE_GRACE_TLV_PERIOD,             "Grace Period" },
137 	{ LS_OPAQUE_GRACE_TLV_REASON,             "Graceful restart Reason" },
138 	{ LS_OPAQUE_GRACE_TLV_INT_ADDRESS,        "IPv4 interface address" },
139 	{ 0,		        NULL }
140 };
141 
142 static struct tok lsa_opaque_grace_tlv_reason_values[] = {
143 	{ LS_OPAQUE_GRACE_TLV_REASON_UNKNOWN,     "Unknown" },
144 	{ LS_OPAQUE_GRACE_TLV_REASON_SW_RESTART,  "Software Restart" },
145 	{ LS_OPAQUE_GRACE_TLV_REASON_SW_UPGRADE,  "Software Reload/Upgrade" },
146 	{ LS_OPAQUE_GRACE_TLV_REASON_CP_SWITCH,   "Control Processor Switch" },
147 	{ 0,		        NULL }
148 };
149 
150 static struct tok lsa_opaque_te_tlv_link_type_sub_tlv_values[] = {
151 	{ LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_PTP, "Point-to-point" },
152 	{ LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_MA,  "Multi-Access" },
153 	{ 0,			NULL }
154 };
155 
156 static struct tok lsa_opaque_ri_tlv_values[] = {
157 	{ LS_OPAQUE_RI_TLV_CAP, "Router Capabilities" },
158 	{ 0,		        NULL }
159 };
160 
161 static struct tok lsa_opaque_ri_tlv_cap_values[] = {
162 	{ 1, "Reserved" },
163 	{ 2, "Reserved" },
164 	{ 4, "Reserved" },
165 	{ 8, "Reserved" },
166 	{ 16, "graceful restart capable" },
167 	{ 32, "graceful restart helper" },
168 	{ 64, "Stub router support" },
169 	{ 128, "Traffic engineering" },
170 	{ 256, "p2p over LAN" },
171 	{ 512, "path computation server" },
172 	{ 0,		        NULL }
173 };
174 
175 static char tstr[] = " [|ospf]";
176 
177 #ifdef WIN32
178 #define inline __inline
179 #endif /* WIN32 */
180 
181 static int ospf_print_lshdr(const struct lsa_hdr *);
182 static const u_char *ospf_print_lsa(const struct lsa *);
183 static int ospf_decode_v2(const struct ospfhdr *, const u_char *);
184 
185 static int
ospf_print_lshdr(register const struct lsa_hdr * lshp)186 ospf_print_lshdr(register const struct lsa_hdr *lshp)
187 {
188         u_int ls_length;
189 
190         TCHECK(lshp->ls_length);
191         ls_length = EXTRACT_16BITS(&lshp->ls_length);
192         if (ls_length < sizeof(struct lsa_hdr)) {
193                 printf("\n\t    Bogus length %u < %lu", ls_length,
194                     (unsigned long)sizeof(struct lsa_hdr));
195                 return(-1);
196         }
197 
198         TCHECK(lshp->ls_seq);	/* XXX - ls_length check checked this */
199 	printf("\n\t  Advertising Router: %s, seq 0x%08x, age %us, length: %u",
200 	       ipaddr_string(&lshp->ls_router),
201 	       EXTRACT_32BITS(&lshp->ls_seq),
202 	       EXTRACT_16BITS(&lshp->ls_age),
203                ls_length-(u_int)sizeof(struct lsa_hdr));
204 
205 	TCHECK(lshp->ls_type);	/* XXX - ls_length check checked this */
206         switch (lshp->ls_type) {
207 	/* the LSA header for opaque LSAs was slightly changed */
208         case LS_TYPE_OPAQUE_LL:
209         case LS_TYPE_OPAQUE_AL:
210         case LS_TYPE_OPAQUE_DW:
211             printf("\n\t    %s LSA (%d), Opaque-Type: %s LSA (%u), Opaque-ID: %u",
212                    tok2str(lsa_values,"unknown",lshp->ls_type),
213                    lshp->ls_type,
214 
215 		   tok2str(lsa_opaque_values,
216 			   "unknown",
217 			   *(&lshp->un_lsa_id.opaque_field.opaque_type)),
218 		   *(&lshp->un_lsa_id.opaque_field.opaque_type),
219 		   EXTRACT_24BITS(&lshp->un_lsa_id.opaque_field.opaque_id)
220 
221                    );
222             break;
223 
224 	/* all other LSA types use regular style LSA headers */
225 	default:
226             printf("\n\t    %s LSA (%d), LSA-ID: %s",
227                    tok2str(lsa_values,"unknown",lshp->ls_type),
228                    lshp->ls_type,
229                    ipaddr_string(&lshp->un_lsa_id.lsa_id));
230             break;
231         }
232 
233 	TCHECK(lshp->ls_options);	/* XXX - ls_length check checked this */
234         printf("\n\t    Options: [%s]", bittok2str(ospf_option_values,"none",lshp->ls_options));
235 
236         return (ls_length);
237 trunc:
238 	return (-1);
239 }
240 
241 /*
242  * Print a single link state advertisement.  If truncated or if LSA length
243  * field is less than the length of the LSA header, return NULl, else
244  * return pointer to data past end of LSA.
245  */
246 static const u_int8_t *
ospf_print_lsa(register const struct lsa * lsap)247 ospf_print_lsa(register const struct lsa *lsap)
248 {
249 	register const u_int8_t *ls_end;
250 	register const struct rlalink *rlp;
251 	register const struct tos_metric *tosp;
252 	register const struct in_addr *ap;
253 	register const struct aslametric *almp;
254 	register const struct mcla *mcp;
255 	register const u_int32_t *lp;
256 	register int j, k, tlv_type, tlv_length, subtlv_type, subtlv_length, priority_level, te_class;
257 	register int ls_length;
258 	const u_int8_t *tptr;
259 	int count_srlg;
260         union { /* int to float conversion buffer for several subTLVs */
261             float f;
262             u_int32_t i;
263         } bw;
264 
265 	tptr = (u_int8_t *)lsap->lsa_un.un_unknown; /* squelch compiler warnings */
266         ls_length = ospf_print_lshdr(&lsap->ls_hdr);
267         if (ls_length == -1)
268                 return(NULL);
269 	ls_end = (u_int8_t *)lsap + ls_length;
270 	ls_length -= sizeof(struct lsa_hdr);
271 
272 	switch (lsap->ls_hdr.ls_type) {
273 
274 	case LS_TYPE_ROUTER:
275 		TCHECK(lsap->lsa_un.un_rla.rla_flags);
276                 printf("\n\t    Router LSA Options: [%s]", bittok2str(ospf_rla_flag_values,"none",lsap->lsa_un.un_rla.rla_flags));
277 
278 		TCHECK(lsap->lsa_un.un_rla.rla_count);
279 		j = EXTRACT_16BITS(&lsap->lsa_un.un_rla.rla_count);
280 		TCHECK(lsap->lsa_un.un_rla.rla_link);
281 		rlp = lsap->lsa_un.un_rla.rla_link;
282 		while (j--) {
283 			TCHECK(*rlp);
284 			switch (rlp->link_type) {
285 
286 			case RLA_TYPE_VIRTUAL:
287 				printf("\n\t      Virtual Link: Neighbor Router-ID: %s, Interface Address: %s",
288 				    ipaddr_string(&rlp->link_id),
289 				    ipaddr_string(&rlp->link_data));
290                                 break;
291 
292 			case RLA_TYPE_ROUTER:
293 				printf("\n\t      Neighbor Router-ID: %s, Interface Address: %s",
294 				    ipaddr_string(&rlp->link_id),
295 				    ipaddr_string(&rlp->link_data));
296 				break;
297 
298 			case RLA_TYPE_TRANSIT:
299 				printf("\n\t      Neighbor Network-ID: %s, Interface Address: %s",
300 				    ipaddr_string(&rlp->link_id),
301 				    ipaddr_string(&rlp->link_data));
302 				break;
303 
304 			case RLA_TYPE_STUB:
305 				printf("\n\t      Stub Network: %s, Mask: %s",
306 				    ipaddr_string(&rlp->link_id),
307 				    ipaddr_string(&rlp->link_data));
308 				break;
309 
310 			default:
311 				printf("\n\t      Unknown Router Link Type (%u)",
312 				    rlp->link_type);
313 				return (ls_end);
314 			}
315 			printf(", tos 0, metric: %d", EXTRACT_16BITS(&rlp->link_tos0metric));
316 			tosp = (struct tos_metric *)
317 			    ((sizeof rlp->link_tos0metric) + (u_char *) rlp);
318 			for (k = 0; k < (int) rlp->link_toscount; ++k, ++tosp) {
319 				TCHECK(*tosp);
320 				printf(", tos %d, metric: %d",
321 				    tosp->tos_type,
322 				    EXTRACT_16BITS(&tosp->tos_metric));
323 			}
324 			rlp = (struct rlalink *)((u_char *)(rlp + 1) +
325 			    ((rlp->link_toscount) * sizeof(*tosp)));
326 		}
327 		break;
328 
329 	case LS_TYPE_NETWORK:
330 		TCHECK(lsap->lsa_un.un_nla.nla_mask);
331 		printf("\n\t    Mask %s\n\t    Connected Routers:",
332 		    ipaddr_string(&lsap->lsa_un.un_nla.nla_mask));
333 		ap = lsap->lsa_un.un_nla.nla_router;
334 		while ((u_char *)ap < ls_end) {
335 			TCHECK(*ap);
336 			printf("\n\t      %s", ipaddr_string(ap));
337 			++ap;
338 		}
339 		break;
340 
341 	case LS_TYPE_SUM_IP:
342 		TCHECK(lsap->lsa_un.un_nla.nla_mask);
343 		printf("\n\t    Mask %s",
344 		    ipaddr_string(&lsap->lsa_un.un_sla.sla_mask));
345 		TCHECK(lsap->lsa_un.un_sla.sla_tosmetric);
346 		lp = lsap->lsa_un.un_sla.sla_tosmetric;
347                 /* suppress tos if its not supported */
348                 if(!((lsap->ls_hdr.ls_options)&OSPF_OPTION_T)) {
349                     printf(", metric: %u", EXTRACT_32BITS(lp)&SLA_MASK_METRIC);
350                     break;
351                 }
352 		while ((u_char *)lp < ls_end) {
353 			register u_int32_t ul;
354 
355 			TCHECK(*lp);
356 			ul = EXTRACT_32BITS(lp);
357 			printf(", tos %d metric %d",
358 			    (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS,
359 			    ul & SLA_MASK_METRIC);
360 			++lp;
361 		}
362 		break;
363 
364 	case LS_TYPE_SUM_ABR:
365 		TCHECK(lsap->lsa_un.un_sla.sla_tosmetric);
366 		lp = lsap->lsa_un.un_sla.sla_tosmetric;
367                 /* suppress tos if its not supported */
368                 if(!((lsap->ls_hdr.ls_options)&OSPF_OPTION_T)) {
369                     printf(", metric: %u", EXTRACT_32BITS(lp)&SLA_MASK_METRIC);
370                     break;
371                 }
372 		while ((u_char *)lp < ls_end) {
373 			register u_int32_t ul;
374 
375 			TCHECK(*lp);
376 			ul = EXTRACT_32BITS(lp);
377 			printf(", tos %d metric %d",
378 			    (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS,
379 			    ul & SLA_MASK_METRIC);
380 			++lp;
381 		}
382 		break;
383 
384 	case LS_TYPE_ASE:
385         case LS_TYPE_NSSA: /* fall through - those LSAs share the same format */
386 		TCHECK(lsap->lsa_un.un_nla.nla_mask);
387 		printf("\n\t    Mask %s",
388 		    ipaddr_string(&lsap->lsa_un.un_asla.asla_mask));
389 
390 		TCHECK(lsap->lsa_un.un_sla.sla_tosmetric);
391 		almp = lsap->lsa_un.un_asla.asla_metric;
392 		while ((u_char *)almp < ls_end) {
393 			register u_int32_t ul;
394 
395 			TCHECK(almp->asla_tosmetric);
396 			ul = EXTRACT_32BITS(&almp->asla_tosmetric);
397 			printf(", type %d, tos %d metric:",
398 			    (ul & ASLA_FLAG_EXTERNAL) ? 2 : 1,
399 			    (ul & ASLA_MASK_TOS) >> ASLA_SHIFT_TOS);
400                         if ((ul & ASLA_MASK_METRIC)==0xffffff)
401                             printf(" infinite");
402                         else
403                             printf(" %d", (ul & ASLA_MASK_METRIC));
404 
405 			TCHECK(almp->asla_forward);
406 			if (almp->asla_forward.s_addr) {
407 				printf(", forward %s",
408 				    ipaddr_string(&almp->asla_forward));
409 			}
410 			TCHECK(almp->asla_tag);
411 			if (almp->asla_tag.s_addr) {
412 				printf(", tag %s",
413 				    ipaddr_string(&almp->asla_tag));
414 			}
415 			++almp;
416 		}
417 		break;
418 
419 	case LS_TYPE_GROUP:
420 		/* Multicast extensions as of 23 July 1991 */
421 		mcp = lsap->lsa_un.un_mcla;
422 		while ((u_char *)mcp < ls_end) {
423 			TCHECK(mcp->mcla_vid);
424 			switch (EXTRACT_32BITS(&mcp->mcla_vtype)) {
425 
426 			case MCLA_VERTEX_ROUTER:
427 				printf("\n\t    Router Router-ID %s",
428 				    ipaddr_string(&mcp->mcla_vid));
429 				break;
430 
431 			case MCLA_VERTEX_NETWORK:
432 				printf("\n\t    Network Designated Router %s",
433 				    ipaddr_string(&mcp->mcla_vid));
434 				break;
435 
436 			default:
437 				printf("\n\t    unknown VertexType (%u)",
438 				    EXTRACT_32BITS(&mcp->mcla_vtype));
439 				break;
440 			}
441 		++mcp;
442 		}
443 		break;
444 
445 	case LS_TYPE_OPAQUE_LL: /* fall through */
446 	case LS_TYPE_OPAQUE_AL:
447 	case LS_TYPE_OPAQUE_DW:
448 
449 	    switch (*(&lsap->ls_hdr.un_lsa_id.opaque_field.opaque_type)) {
450             case LS_OPAQUE_TYPE_RI:
451 		tptr = (u_int8_t *)(&lsap->lsa_un.un_ri_tlv.type);
452 
453 		while (ls_length != 0) {
454                     TCHECK2(*tptr, 4);
455 		    if (ls_length < 4) {
456                         printf("\n\t    Remaining LS length %u < 4", ls_length);
457                         return(ls_end);
458                     }
459                     tlv_type = EXTRACT_16BITS(tptr);
460                     tlv_length = EXTRACT_16BITS(tptr+2);
461                     tptr+=4;
462                     ls_length-=4;
463 
464                     printf("\n\t    %s TLV (%u), length: %u, value: ",
465                            tok2str(lsa_opaque_ri_tlv_values,"unknown",tlv_type),
466                            tlv_type,
467                            tlv_length);
468 
469                     if (tlv_length > ls_length) {
470                         printf("\n\t    Bogus length %u > %u", tlv_length,
471                             ls_length);
472                         return(ls_end);
473                     }
474                     ls_length-=tlv_length;
475                     TCHECK2(*tptr, tlv_length);
476                     switch(tlv_type) {
477 
478                     case LS_OPAQUE_RI_TLV_CAP:
479                         if (tlv_length != 4) {
480                             printf("\n\t    Bogus length %u != 4", tlv_length);
481                             return(ls_end);
482                         }
483                         printf("Capabilities: %s",
484                                bittok2str(lsa_opaque_ri_tlv_cap_values, "Unknown", EXTRACT_32BITS(tptr)));
485                         break;
486                     default:
487                         if (vflag <= 1) {
488                             if(!print_unknown_data(tptr,"\n\t      ",tlv_length))
489                                 return(ls_end);
490                         }
491                         break;
492 
493                     }
494                     tptr+=tlv_length;
495                 }
496 
497                 break;
498             case LS_OPAQUE_TYPE_GRACE:
499 		tptr = (u_int8_t *)(&lsap->lsa_un.un_grace_tlv.type);
500 
501 		while (ls_length != 0) {
502                     TCHECK2(*tptr, 4);
503 		    if (ls_length < 4) {
504                         printf("\n\t    Remaining LS length %u < 4", ls_length);
505                         return(ls_end);
506                     }
507                     tlv_type = EXTRACT_16BITS(tptr);
508                     tlv_length = EXTRACT_16BITS(tptr+2);
509                     tptr+=4;
510                     ls_length-=4;
511 
512                     printf("\n\t    %s TLV (%u), length: %u, value: ",
513                            tok2str(lsa_opaque_grace_tlv_values,"unknown",tlv_type),
514                            tlv_type,
515                            tlv_length);
516 
517                     if (tlv_length > ls_length) {
518                         printf("\n\t    Bogus length %u > %u", tlv_length,
519                             ls_length);
520                         return(ls_end);
521                     }
522                     ls_length-=tlv_length;
523                     TCHECK2(*tptr, tlv_length);
524                     switch(tlv_type) {
525 
526                     case LS_OPAQUE_GRACE_TLV_PERIOD:
527                         if (tlv_length != 4) {
528                             printf("\n\t    Bogus length %u != 4", tlv_length);
529                             return(ls_end);
530                         }
531                         printf("%us",EXTRACT_32BITS(tptr));
532                         break;
533                     case LS_OPAQUE_GRACE_TLV_REASON:
534                         if (tlv_length != 1) {
535                             printf("\n\t    Bogus length %u != 1", tlv_length);
536                             return(ls_end);
537                         }
538                         printf("%s (%u)",
539                                tok2str(lsa_opaque_grace_tlv_reason_values, "Unknown", *tptr),
540                                *tptr);
541                         break;
542                     case LS_OPAQUE_GRACE_TLV_INT_ADDRESS:
543                         if (tlv_length != 4) {
544                             printf("\n\t    Bogus length %u != 4", tlv_length);
545                             return(ls_end);
546                         }
547                         printf("%s", ipaddr_string(tptr));
548                         break;
549                     default:
550                         if (vflag <= 1) {
551                             if(!print_unknown_data(tptr,"\n\t      ",tlv_length))
552                                 return(ls_end);
553                         }
554                         break;
555 
556                     }
557                     tptr+=tlv_length;
558                 }
559 
560                 break;
561 	    case LS_OPAQUE_TYPE_TE:
562 		tptr = (u_int8_t *)(&lsap->lsa_un.un_te_lsa_tlv.type);
563 
564 		while (ls_length != 0) {
565                     TCHECK2(*tptr, 4);
566 		    if (ls_length < 4) {
567                         printf("\n\t    Remaining LS length %u < 4", ls_length);
568                         return(ls_end);
569                     }
570                     tlv_type = EXTRACT_16BITS(tptr);
571                     tlv_length = EXTRACT_16BITS(tptr+2);
572                     tptr+=4;
573                     ls_length-=4;
574 
575                     printf("\n\t    %s TLV (%u), length: %u",
576                            tok2str(lsa_opaque_te_tlv_values,"unknown",tlv_type),
577                            tlv_type,
578                            tlv_length);
579 
580                     if (tlv_length > ls_length) {
581                         printf("\n\t    Bogus length %u > %u", tlv_length,
582                             ls_length);
583                         return(ls_end);
584                     }
585                     ls_length-=tlv_length;
586                     switch(tlv_type) {
587                     case LS_OPAQUE_TE_TLV_LINK:
588                         while (tlv_length != 0) {
589                             if (tlv_length < 4) {
590                                 printf("\n\t    Remaining TLV length %u < 4",
591                                     tlv_length);
592                                 return(ls_end);
593                             }
594                             TCHECK2(*tptr, 4);
595                             subtlv_type = EXTRACT_16BITS(tptr);
596                             subtlv_length = EXTRACT_16BITS(tptr+2);
597                             tptr+=4;
598                             tlv_length-=4;
599 
600                             printf("\n\t      %s subTLV (%u), length: %u",
601                                    tok2str(lsa_opaque_te_link_tlv_subtlv_values,"unknown",subtlv_type),
602                                    subtlv_type,
603                                    subtlv_length);
604 
605                             TCHECK2(*tptr, subtlv_length);
606                             switch(subtlv_type) {
607                             case LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP:
608                                 printf(", 0x%08x", EXTRACT_32BITS(tptr));
609                                 break;
610                             case LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID:
611                             case LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID:
612                                 printf(", %s (0x%08x)",
613                                        ipaddr_string(tptr),
614                                        EXTRACT_32BITS(tptr));
615                                 if (subtlv_length == 8) /* draft-ietf-ccamp-ospf-gmpls-extensions */
616                                     printf(", %s (0x%08x)",
617                                            ipaddr_string(tptr+4),
618                                            EXTRACT_32BITS(tptr+4));
619                                 break;
620                             case LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP:
621                             case LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP:
622                                 printf(", %s", ipaddr_string(tptr));
623                                 break;
624                             case LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW:
625                             case LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW:
626                                 bw.i = EXTRACT_32BITS(tptr);
627                                 printf(", %.3f Mbps", bw.f*8/1000000 );
628                                 break;
629                             case LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW:
630                                 for (te_class = 0; te_class < 8; te_class++) {
631                                     bw.i = EXTRACT_32BITS(tptr+te_class*4);
632                                     printf("\n\t\tTE-Class %u: %.3f Mbps",
633                                            te_class,
634                                            bw.f*8/1000000 );
635                                 }
636                                 break;
637                             case LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS:
638                                 printf("\n\t\tBandwidth Constraints Model ID: %s (%u)",
639                                        tok2str(diffserv_te_bc_values, "unknown", *tptr),
640                                        *tptr);
641                                 /* decode BCs until the subTLV ends */
642                                 for (te_class = 0; te_class < (subtlv_length-4)/4; te_class++) {
643                                     bw.i = EXTRACT_32BITS(tptr+4+te_class*4);
644                                     printf("\n\t\t  Bandwidth constraint CT%u: %.3f Mbps",
645                                            te_class,
646                                            bw.f*8/1000000 );
647                                 }
648                                 break;
649                             case LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC:
650                                 printf(", Metric %u", EXTRACT_32BITS(tptr));
651                                 break;
652                             case LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE:
653                                 printf(", %s, Priority %u",
654                                        bittok2str(gmpls_link_prot_values, "none", *tptr),
655                                        *(tptr+1));
656                                 break;
657                             case LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR:
658                                 printf("\n\t\tInterface Switching Capability: %s",
659                                        tok2str(gmpls_switch_cap_values, "Unknown", *(tptr)));
660                                 printf("\n\t\tLSP Encoding: %s\n\t\tMax LSP Bandwidth:",
661                                        tok2str(gmpls_encoding_values, "Unknown", *(tptr+1)));
662                                 for (priority_level = 0; priority_level < 8; priority_level++) {
663                                     bw.i = EXTRACT_32BITS(tptr+4+(priority_level*4));
664                                     printf("\n\t\t  priority level %d: %.3f Mbps",
665                                            priority_level,
666                                            bw.f*8/1000000 );
667                                 }
668                                 break;
669                             case LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE:
670                                 printf(", %s (%u)",
671                                        tok2str(lsa_opaque_te_tlv_link_type_sub_tlv_values,"unknown",*tptr),
672                                        *tptr);
673                                 break;
674 
675                             case LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP:
676                                 count_srlg = subtlv_length / 4;
677                                 if (count_srlg != 0)
678                                      printf("\n\t\t  Shared risk group: ");
679                                 while (count_srlg > 0) {
680                                         bw.i = EXTRACT_32BITS(tptr);
681                                         printf("%d",bw.i);
682                                         tptr+=4;
683                                         count_srlg--;
684                                         if (count_srlg > 0)
685                                             printf(", ");
686                                 }
687                                 break;
688 
689                             default:
690                                 if (vflag <= 1) {
691                                     if(!print_unknown_data(tptr,"\n\t\t",subtlv_length))
692                                         return(ls_end);
693                                 }
694                                 break;
695                             }
696                             /* in OSPF everything has to be 32-bit aligned, including TLVs */
697                             if (subtlv_length%4 != 0)
698                                 subtlv_length+=4-(subtlv_length%4);
699 
700                             tlv_length-=subtlv_length;
701                             tptr+=subtlv_length;
702 
703                         }
704                         break;
705 
706                     case LS_OPAQUE_TE_TLV_ROUTER:
707                         if (tlv_length < 4) {
708                             printf("\n\t    TLV length %u < 4", tlv_length);
709                             return(ls_end);
710                         }
711                         TCHECK2(*tptr, 4);
712                         printf(", %s", ipaddr_string(tptr));
713                         break;
714 
715                     default:
716                         if (vflag <= 1) {
717                             if(!print_unknown_data(tptr,"\n\t      ",tlv_length))
718                                 return(ls_end);
719                         }
720                         break;
721                     }
722                     tptr+=tlv_length;
723 		}
724                 break;
725 	    }
726 	    break;
727         default:
728             if (vflag <= 1) {
729                 if(!print_unknown_data((u_int8_t *)lsap->lsa_un.un_unknown,
730                                        "\n\t    ", ls_length))
731                     return(ls_end);
732             }
733             break;
734         }
735 
736         /* do we want to see an additionally hexdump ? */
737         if (vflag> 1)
738             if(!print_unknown_data((u_int8_t *)lsap->lsa_un.un_unknown,
739                                    "\n\t    ", ls_length)) {
740                 return(ls_end);
741             }
742 
743 	return (ls_end);
744 trunc:
745 	return (NULL);
746 }
747 
748 static int
ospf_decode_v2(register const struct ospfhdr * op,register const u_char * dataend)749 ospf_decode_v2(register const struct ospfhdr *op,
750     register const u_char *dataend)
751 {
752 	register const struct in_addr *ap;
753 	register const struct lsr *lsrp;
754 	register const struct lsa_hdr *lshp;
755 	register const struct lsa *lsap;
756 	register u_int32_t lsa_count,lsa_count_max;
757 
758 	switch (op->ospf_type) {
759 
760 	case OSPF_TYPE_UMD:
761 		/*
762 		 * Rob Coltun's special monitoring packets;
763 		 * do nothing
764 		 */
765 		break;
766 
767 	case OSPF_TYPE_HELLO:
768                 printf("\n\tOptions: [%s]",
769                        bittok2str(ospf_option_values,"none",op->ospf_hello.hello_options));
770 
771                 TCHECK(op->ospf_hello.hello_deadint);
772                 printf("\n\t  Hello Timer: %us, Dead Timer %us, Mask: %s, Priority: %u",
773                        EXTRACT_16BITS(&op->ospf_hello.hello_helloint),
774                        EXTRACT_32BITS(&op->ospf_hello.hello_deadint),
775                        ipaddr_string(&op->ospf_hello.hello_mask),
776                        op->ospf_hello.hello_priority);
777 
778 		TCHECK(op->ospf_hello.hello_dr);
779 		if (op->ospf_hello.hello_dr.s_addr != 0)
780 			printf("\n\t  Designated Router %s",
781 			    ipaddr_string(&op->ospf_hello.hello_dr));
782 
783 		TCHECK(op->ospf_hello.hello_bdr);
784 		if (op->ospf_hello.hello_bdr.s_addr != 0)
785 			printf(", Backup Designated Router %s",
786 			    ipaddr_string(&op->ospf_hello.hello_bdr));
787 
788                 ap = op->ospf_hello.hello_neighbor;
789                 if ((u_char *)ap < dataend)
790                         printf("\n\t  Neighbor List:");
791                 while ((u_char *)ap < dataend) {
792                         TCHECK(*ap);
793                         printf("\n\t    %s", ipaddr_string(ap));
794                         ++ap;
795                 }
796 		break;	/* HELLO */
797 
798 	case OSPF_TYPE_DD:
799 		TCHECK(op->ospf_db.db_options);
800                 printf("\n\tOptions: [%s]",
801                        bittok2str(ospf_option_values,"none",op->ospf_db.db_options));
802 		TCHECK(op->ospf_db.db_flags);
803                 printf(", DD Flags: [%s]",
804                        bittok2str(ospf_dd_flag_values,"none",op->ospf_db.db_flags));
805 
806 		if (vflag) {
807 			/* Print all the LS adv's */
808 			lshp = op->ospf_db.db_lshdr;
809 			while (ospf_print_lshdr(lshp) != -1) {
810 				++lshp;
811 			}
812 		}
813 		break;
814 
815 	case OSPF_TYPE_LS_REQ:
816                 lsrp = op->ospf_lsr;
817                 while ((u_char *)lsrp < dataend) {
818                     TCHECK(*lsrp);
819 
820                     printf("\n\t  Advertising Router: %s, %s LSA (%u)",
821                            ipaddr_string(&lsrp->ls_router),
822                            tok2str(lsa_values,"unknown",EXTRACT_32BITS(lsrp->ls_type)),
823                            EXTRACT_32BITS(&lsrp->ls_type));
824 
825                     switch (EXTRACT_32BITS(lsrp->ls_type)) {
826                         /* the LSA header for opaque LSAs was slightly changed */
827                     case LS_TYPE_OPAQUE_LL:
828                     case LS_TYPE_OPAQUE_AL:
829                     case LS_TYPE_OPAQUE_DW:
830                         printf(", Opaque-Type: %s LSA (%u), Opaque-ID: %u",
831                                tok2str(lsa_opaque_values, "unknown",lsrp->un_ls_stateid.opaque_field.opaque_type),
832                                lsrp->un_ls_stateid.opaque_field.opaque_type,
833                                EXTRACT_24BITS(&lsrp->un_ls_stateid.opaque_field.opaque_id));
834                         break;
835                     default:
836                         printf(", LSA-ID: %s",
837                                ipaddr_string(&lsrp->un_ls_stateid.ls_stateid));
838                         break;
839                     }
840 
841                     ++lsrp;
842                 }
843 		break;
844 
845 	case OSPF_TYPE_LS_UPDATE:
846                 lsap = op->ospf_lsu.lsu_lsa;
847                 TCHECK(op->ospf_lsu.lsu_count);
848                 lsa_count_max = EXTRACT_32BITS(&op->ospf_lsu.lsu_count);
849                 printf(", %d LSA%s",lsa_count_max, lsa_count_max > 1 ? "s" : "");
850                 for (lsa_count=1;lsa_count <= lsa_count_max;lsa_count++) {
851                     printf("\n\t  LSA #%u",lsa_count);
852                         lsap = (const struct lsa *)ospf_print_lsa(lsap);
853                         if (lsap == NULL)
854                                 goto trunc;
855                 }
856 		break;
857 
858 	case OSPF_TYPE_LS_ACK:
859                 lshp = op->ospf_lsa.lsa_lshdr;
860                 while (ospf_print_lshdr(lshp) != -1) {
861                     ++lshp;
862                 }
863                 break;
864 
865 	default:
866 		printf("v2 type (%d)", op->ospf_type);
867 		break;
868 	}
869 	return (0);
870 trunc:
871 	return (1);
872 }
873 
874 void
ospf_print(register const u_char * bp,register u_int length,const u_char * bp2 _U_)875 ospf_print(register const u_char *bp, register u_int length,
876     const u_char *bp2 _U_)
877 {
878 	register const struct ospfhdr *op;
879 	register const u_char *dataend;
880 	register const char *cp;
881 
882 	op = (struct ospfhdr *)bp;
883 
884         /* XXX Before we do anything else, strip off the MD5 trailer */
885         TCHECK(op->ospf_authtype);
886         if (EXTRACT_16BITS(&op->ospf_authtype) == OSPF_AUTH_MD5) {
887                 length -= OSPF_AUTH_MD5_LEN;
888                 snapend -= OSPF_AUTH_MD5_LEN;
889         }
890 
891 	/* If the type is valid translate it, or just print the type */
892 	/* value.  If it's not valid, say so and return */
893 	TCHECK(op->ospf_type);
894 	cp = tok2str(type2str, "unknown LS-type", op->ospf_type);
895 	printf("OSPFv%u, %s, length: %u",
896 	       op->ospf_version,
897 	       cp,
898 	       length);
899 	if (*cp == 'u')
900 		return;
901 
902         if(!vflag) /* non verbose - so lets bail out here */
903                 return;
904 
905 	TCHECK(op->ospf_len);
906 	if (length != EXTRACT_16BITS(&op->ospf_len)) {
907 		printf(" [len %d]", EXTRACT_16BITS(&op->ospf_len));
908 		return;
909 	}
910 	dataend = bp + length;
911 
912 	TCHECK(op->ospf_routerid);
913         printf("\n\tRouter-ID: %s", ipaddr_string(&op->ospf_routerid));
914 
915 	TCHECK(op->ospf_areaid);
916 	if (op->ospf_areaid.s_addr != 0)
917 		printf(", Area %s", ipaddr_string(&op->ospf_areaid));
918 	else
919 		printf(", Backbone Area");
920 
921 	if (vflag) {
922 		/* Print authentication data (should we really do this?) */
923 		TCHECK2(op->ospf_authdata[0], sizeof(op->ospf_authdata));
924 
925                 printf(", Authentication Type: %s (%u)",
926                        tok2str(ospf_authtype_values,"unknown",EXTRACT_16BITS(&op->ospf_authtype)),
927                        EXTRACT_16BITS(&op->ospf_authtype));
928 
929 		switch (EXTRACT_16BITS(&op->ospf_authtype)) {
930 
931 		case OSPF_AUTH_NONE:
932 			break;
933 
934 		case OSPF_AUTH_SIMPLE:
935                         printf("\n\tSimple text password: ");
936                         safeputs(op->ospf_authdata, OSPF_AUTH_SIMPLE_LEN);
937 			break;
938 
939 		case OSPF_AUTH_MD5:
940                         printf("\n\tKey-ID: %u, Auth-Length: %u, Crypto Sequence Number: 0x%08x",
941                                *((op->ospf_authdata)+2),
942                                *((op->ospf_authdata)+3),
943                                EXTRACT_32BITS((op->ospf_authdata)+4));
944 			break;
945 
946 		default:
947 			return;
948 		}
949 	}
950 	/* Do rest according to version.	 */
951 	switch (op->ospf_version) {
952 
953 	case 2:
954 		/* ospf version 2 */
955 		if (ospf_decode_v2(op, dataend))
956 			goto trunc;
957 		break;
958 
959 	default:
960 		printf(" ospf [version %d]", op->ospf_version);
961 		break;
962 	}			/* end switch on version */
963 
964 	return;
965 trunc:
966 	fputs(tstr, stdout);
967 }
968