2 * Copyright (c) 1992, 1993, 1994, 1995, 1996, 1997
3 * The Regents of the University of California. All rights reserved.
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
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.
21 * OSPF support contributed by Jeffrey Honig (jch@mitchell.cit.cornell.edu)
24 #define NETDISSECT_REWORKED
29 #include <tcpdump-stdinc.h>
31 #include "interface.h"
32 #include "addrtoname.h"
38 static const char tstr[] = " [|ospf2]";
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" },
52 static const struct tok ospf_authtype_values[] = {
53 { OSPF_AUTH_NONE, "none" },
54 { OSPF_AUTH_SIMPLE, "simple" },
55 { OSPF_AUTH_MD5, "MD5" },
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" },
67 static const struct tok type2str[] = {
68 { OSPF_TYPE_UMD, "UMD" },
69 { OSPF_TYPE_HELLO, "Hello" },
70 { OSPF_TYPE_DD, "Database Description" },
71 { OSPF_TYPE_LS_REQ, "LS-Request" },
72 { OSPF_TYPE_LS_UPDATE, "LS-Update" },
73 { OSPF_TYPE_LS_ACK, "LS-Ack" },
77 static const struct tok lsa_values[] = {
78 { LS_TYPE_ROUTER, "Router" },
79 { LS_TYPE_NETWORK, "Network" },
80 { LS_TYPE_SUM_IP, "Summary" },
81 { LS_TYPE_SUM_ABR, "ASBR Summary" },
82 { LS_TYPE_ASE, "External" },
83 { LS_TYPE_GROUP, "Multicast Group" },
84 { LS_TYPE_NSSA, "NSSA" },
85 { LS_TYPE_OPAQUE_LL, "Link Local Opaque" },
86 { LS_TYPE_OPAQUE_AL, "Area Local Opaque" },
87 { LS_TYPE_OPAQUE_DW, "Domain Wide Opaque" },
91 static const struct tok ospf_dd_flag_values[] = {
92 { OSPF_DB_INIT, "Init" },
93 { OSPF_DB_MORE, "More" },
94 { OSPF_DB_MASTER, "Master" },
95 { OSPF_DB_RESYNC, "OOBResync" },
99 static const struct tok lsa_opaque_values[] = {
100 { LS_OPAQUE_TYPE_TE, "Traffic Engineering" },
101 { LS_OPAQUE_TYPE_GRACE, "Graceful restart" },
102 { LS_OPAQUE_TYPE_RI, "Router Information" },
106 static const struct tok lsa_opaque_te_tlv_values[] = {
107 { LS_OPAQUE_TE_TLV_ROUTER, "Router Address" },
108 { LS_OPAQUE_TE_TLV_LINK, "Link" },
112 static const struct tok lsa_opaque_te_link_tlv_subtlv_values[] = {
113 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE, "Link Type" },
114 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID, "Link ID" },
115 { LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP, "Local Interface IP address" },
116 { LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP, "Remote Interface IP address" },
117 { LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC, "Traffic Engineering Metric" },
118 { LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW, "Maximum Bandwidth" },
119 { LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW, "Maximum Reservable Bandwidth" },
120 { LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW, "Unreserved Bandwidth" },
121 { LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP, "Administrative Group" },
122 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" },
123 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE, "Link Protection Type" },
124 { LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR, "Interface Switching Capability" },
125 { LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP, "Shared Risk Link Group" },
126 { LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS, "Bandwidth Constraints" },
130 static const struct tok lsa_opaque_grace_tlv_values[] = {
131 { LS_OPAQUE_GRACE_TLV_PERIOD, "Grace Period" },
132 { LS_OPAQUE_GRACE_TLV_REASON, "Graceful restart Reason" },
133 { LS_OPAQUE_GRACE_TLV_INT_ADDRESS, "IPv4 interface address" },
137 static const struct tok lsa_opaque_grace_tlv_reason_values[] = {
138 { LS_OPAQUE_GRACE_TLV_REASON_UNKNOWN, "Unknown" },
139 { LS_OPAQUE_GRACE_TLV_REASON_SW_RESTART, "Software Restart" },
140 { LS_OPAQUE_GRACE_TLV_REASON_SW_UPGRADE, "Software Reload/Upgrade" },
141 { LS_OPAQUE_GRACE_TLV_REASON_CP_SWITCH, "Control Processor Switch" },
145 static const struct tok lsa_opaque_te_tlv_link_type_sub_tlv_values[] = {
146 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_PTP, "Point-to-point" },
147 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_MA, "Multi-Access" },
151 static const struct tok lsa_opaque_ri_tlv_values[] = {
152 { LS_OPAQUE_RI_TLV_CAP, "Router Capabilities" },
156 static const struct tok lsa_opaque_ri_tlv_cap_values[] = {
161 { 16, "graceful restart capable" },
162 { 32, "graceful restart helper" },
163 { 64, "Stub router support" },
164 { 128, "Traffic engineering" },
165 { 256, "p2p over LAN" },
166 { 512, "path computation server" },
170 static const struct tok ospf_lls_tlv_values[] = {
171 { OSPF_LLS_EO, "Extended Options" },
172 { OSPF_LLS_MD5, "MD5 Authentication" },
176 static const struct tok ospf_lls_eo_options[] = {
177 { OSPF_LLS_EO_LR, "LSDB resync" },
178 { OSPF_LLS_EO_RS, "Restart" },
183 ospf_print_grace_lsa(netdissect_options *ndo,
184 const uint8_t *tptr, u_int ls_length)
186 u_int tlv_type, tlv_length;
189 while (ls_length > 0) {
190 ND_TCHECK2(*tptr, 4);
192 ND_PRINT((ndo, "\n\t Remaining LS length %u < 4", ls_length));
195 tlv_type = EXTRACT_16BITS(tptr);
196 tlv_length = EXTRACT_16BITS(tptr+2);
200 ND_PRINT((ndo, "\n\t %s TLV (%u), length %u, value: ",
201 tok2str(lsa_opaque_grace_tlv_values,"unknown",tlv_type),
205 if (tlv_length > ls_length) {
206 ND_PRINT((ndo, "\n\t Bogus length %u > %u", tlv_length,
211 /* Infinite loop protection. */
212 if (tlv_type == 0 || tlv_length ==0) {
216 ND_TCHECK2(*tptr, tlv_length);
219 case LS_OPAQUE_GRACE_TLV_PERIOD:
220 if (tlv_length != 4) {
221 ND_PRINT((ndo, "\n\t Bogus length %u != 4", tlv_length));
224 ND_PRINT((ndo, "%us", EXTRACT_32BITS(tptr)));
227 case LS_OPAQUE_GRACE_TLV_REASON:
228 if (tlv_length != 1) {
229 ND_PRINT((ndo, "\n\t Bogus length %u != 1", tlv_length));
232 ND_PRINT((ndo, "%s (%u)",
233 tok2str(lsa_opaque_grace_tlv_reason_values, "Unknown", *tptr),
237 case LS_OPAQUE_GRACE_TLV_INT_ADDRESS:
238 if (tlv_length != 4) {
239 ND_PRINT((ndo, "\n\t Bogus length %u != 4", tlv_length));
242 ND_PRINT((ndo, "%s", ipaddr_string(ndo, tptr)));
246 if (ndo->ndo_vflag <= 1) {
247 if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_length))
253 /* in OSPF everything has to be 32-bit aligned, including TLVs */
254 if (tlv_length%4 != 0)
255 tlv_length+=4-(tlv_length%4);
256 ls_length-=tlv_length;
266 ospf_print_te_lsa(netdissect_options *ndo,
267 const uint8_t *tptr, u_int ls_length)
269 u_int tlv_type, tlv_length, subtlv_type, subtlv_length;
270 u_int priority_level, te_class, count_srlg;
271 union { /* int to float conversion buffer for several subTLVs */
276 while (ls_length != 0) {
277 ND_TCHECK2(*tptr, 4);
279 ND_PRINT((ndo, "\n\t Remaining LS length %u < 4", ls_length));
282 tlv_type = EXTRACT_16BITS(tptr);
283 tlv_length = EXTRACT_16BITS(tptr+2);
287 ND_PRINT((ndo, "\n\t %s TLV (%u), length: %u",
288 tok2str(lsa_opaque_te_tlv_values,"unknown",tlv_type),
292 if (tlv_length > ls_length) {
293 ND_PRINT((ndo, "\n\t Bogus length %u > %u", tlv_length,
298 /* Infinite loop protection. */
299 if (tlv_type == 0 || tlv_length ==0) {
304 case LS_OPAQUE_TE_TLV_LINK:
305 while (tlv_length >= sizeof(subtlv_type) + sizeof(subtlv_length)) {
306 if (tlv_length < 4) {
307 ND_PRINT((ndo, "\n\t Remaining TLV length %u < 4",
311 ND_TCHECK2(*tptr, 4);
312 subtlv_type = EXTRACT_16BITS(tptr);
313 subtlv_length = EXTRACT_16BITS(tptr+2);
317 ND_PRINT((ndo, "\n\t %s subTLV (%u), length: %u",
318 tok2str(lsa_opaque_te_link_tlv_subtlv_values,"unknown",subtlv_type),
322 ND_TCHECK2(*tptr, subtlv_length);
323 switch(subtlv_type) {
324 case LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP:
325 ND_PRINT((ndo, ", 0x%08x", EXTRACT_32BITS(tptr)));
327 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID:
328 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID:
329 ND_PRINT((ndo, ", %s (0x%08x)",
330 ipaddr_string(ndo, tptr),
331 EXTRACT_32BITS(tptr)));
332 if (subtlv_length == 8) /* rfc4203 */
333 ND_PRINT((ndo, ", %s (0x%08x)",
334 ipaddr_string(ndo, tptr+4),
335 EXTRACT_32BITS(tptr + 4)));
337 case LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP:
338 case LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP:
339 ND_PRINT((ndo, ", %s", ipaddr_string(ndo, tptr)));
341 case LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW:
342 case LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW:
343 bw.i = EXTRACT_32BITS(tptr);
344 ND_PRINT((ndo, ", %.3f Mbps", bw.f * 8 / 1000000));
346 case LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW:
347 for (te_class = 0; te_class < 8; te_class++) {
348 bw.i = EXTRACT_32BITS(tptr+te_class*4);
349 ND_PRINT((ndo, "\n\t\tTE-Class %u: %.3f Mbps",
351 bw.f * 8 / 1000000));
354 case LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS:
355 ND_PRINT((ndo, "\n\t\tBandwidth Constraints Model ID: %s (%u)",
356 tok2str(diffserv_te_bc_values, "unknown", *tptr),
358 /* decode BCs until the subTLV ends */
359 for (te_class = 0; te_class < (subtlv_length-4)/4; te_class++) {
360 bw.i = EXTRACT_32BITS(tptr+4+te_class*4);
361 ND_PRINT((ndo, "\n\t\t Bandwidth constraint CT%u: %.3f Mbps",
363 bw.f * 8 / 1000000));
366 case LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC:
367 ND_PRINT((ndo, ", Metric %u", EXTRACT_32BITS(tptr)));
369 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE:
370 ND_PRINT((ndo, ", %s, Priority %u",
371 bittok2str(gmpls_link_prot_values, "none", *tptr),
374 case LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR:
375 ND_PRINT((ndo, "\n\t\tInterface Switching Capability: %s",
376 tok2str(gmpls_switch_cap_values, "Unknown", *(tptr))));
377 ND_PRINT((ndo, "\n\t\tLSP Encoding: %s\n\t\tMax LSP Bandwidth:",
378 tok2str(gmpls_encoding_values, "Unknown", *(tptr + 1))));
379 for (priority_level = 0; priority_level < 8; priority_level++) {
380 bw.i = EXTRACT_32BITS(tptr+4+(priority_level*4));
381 ND_PRINT((ndo, "\n\t\t priority level %d: %.3f Mbps",
383 bw.f * 8 / 1000000));
386 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE:
387 ND_PRINT((ndo, ", %s (%u)",
388 tok2str(lsa_opaque_te_tlv_link_type_sub_tlv_values,"unknown",*tptr),
392 case LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP:
393 count_srlg = subtlv_length / 4;
395 ND_PRINT((ndo, "\n\t\t Shared risk group: "));
396 while (count_srlg > 0) {
397 bw.i = EXTRACT_32BITS(tptr);
398 ND_PRINT((ndo, "%d", bw.i));
402 ND_PRINT((ndo, ", "));
407 if (ndo->ndo_vflag <= 1) {
408 if (!print_unknown_data(ndo, tptr, "\n\t\t", subtlv_length))
413 /* in OSPF everything has to be 32-bit aligned, including subTLVs */
414 if (subtlv_length%4 != 0)
415 subtlv_length+=4-(subtlv_length%4);
417 tlv_length-=subtlv_length;
423 case LS_OPAQUE_TE_TLV_ROUTER:
424 if (tlv_length < 4) {
425 ND_PRINT((ndo, "\n\t TLV length %u < 4", tlv_length));
428 ND_TCHECK2(*tptr, 4);
429 ND_PRINT((ndo, ", %s", ipaddr_string(ndo, tptr)));
433 if (ndo->ndo_vflag <= 1) {
434 if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_length))
439 /* in OSPF everything has to be 32-bit aligned, including TLVs */
440 if (tlv_length%4 != 0)
441 tlv_length+=4-(tlv_length%4);
442 ls_length-=tlv_length;
451 ospf_print_lshdr(netdissect_options *ndo,
452 register const struct lsa_hdr *lshp)
456 ND_TCHECK(lshp->ls_length);
457 ls_length = EXTRACT_16BITS(&lshp->ls_length);
458 if (ls_length < sizeof(struct lsa_hdr)) {
459 ND_PRINT((ndo, "\n\t Bogus length %u < header (%lu)", ls_length,
460 (unsigned long)sizeof(struct lsa_hdr)));
464 ND_TCHECK(lshp->ls_seq); /* XXX - ls_length check checked this */
465 ND_PRINT((ndo, "\n\t Advertising Router %s, seq 0x%08x, age %us, length %u",
466 ipaddr_string(ndo, &lshp->ls_router),
467 EXTRACT_32BITS(&lshp->ls_seq),
468 EXTRACT_16BITS(&lshp->ls_age),
469 ls_length - (u_int)sizeof(struct lsa_hdr)));
471 ND_TCHECK(lshp->ls_type); /* XXX - ls_length check checked this */
472 switch (lshp->ls_type) {
473 /* the LSA header for opaque LSAs was slightly changed */
474 case LS_TYPE_OPAQUE_LL:
475 case LS_TYPE_OPAQUE_AL:
476 case LS_TYPE_OPAQUE_DW:
477 ND_PRINT((ndo, "\n\t %s LSA (%d), Opaque-Type %s LSA (%u), Opaque-ID %u",
478 tok2str(lsa_values,"unknown",lshp->ls_type),
481 tok2str(lsa_opaque_values,
483 *(&lshp->un_lsa_id.opaque_field.opaque_type)),
484 *(&lshp->un_lsa_id.opaque_field.opaque_type),
485 EXTRACT_24BITS(&lshp->un_lsa_id.opaque_field.opaque_id)
490 /* all other LSA types use regular style LSA headers */
492 ND_PRINT((ndo, "\n\t %s LSA (%d), LSA-ID: %s",
493 tok2str(lsa_values,"unknown",lshp->ls_type),
495 ipaddr_string(ndo, &lshp->un_lsa_id.lsa_id)));
499 ND_TCHECK(lshp->ls_options); /* XXX - ls_length check checked this */
500 ND_PRINT((ndo, "\n\t Options: [%s]", bittok2str(ospf_option_values, "none", lshp->ls_options)));
507 /* draft-ietf-ospf-mt-09 */
508 static const struct tok ospf_topology_values[] = {
511 { 2, "management " },
516 * Print all the per-topology metrics.
519 ospf_print_tos_metrics(netdissect_options *ndo,
520 const union un_tos *tos)
525 toscount = tos->link.link_tos_count+1;
529 * All but the first metric contain a valid topology id.
532 ND_PRINT((ndo, "\n\t\ttopology %s(%u), metric %u",
533 tok2str(ospf_topology_values, "",
534 metric_count ? tos->metrics.tos_type : 0),
535 metric_count ? tos->metrics.tos_type : 0,
536 EXTRACT_16BITS(&tos->metrics.tos_metric)));
544 * Print a single link state advertisement. If truncated or if LSA length
545 * field is less than the length of the LSA header, return NULl, else
546 * return pointer to data past end of LSA.
548 static const uint8_t *
549 ospf_print_lsa(netdissect_options *ndo,
550 register const struct lsa *lsap)
552 register const uint8_t *ls_end;
553 register const struct rlalink *rlp;
554 register const struct in_addr *ap;
555 register const struct aslametric *almp;
556 register const struct mcla *mcp;
557 register const uint32_t *lp;
558 register int j, tlv_type, tlv_length, topology;
559 register int ls_length;
562 tptr = (uint8_t *)lsap->lsa_un.un_unknown; /* squelch compiler warnings */
563 ls_length = ospf_print_lshdr(ndo, &lsap->ls_hdr);
566 ls_end = (uint8_t *)lsap + ls_length;
567 ls_length -= sizeof(struct lsa_hdr);
569 switch (lsap->ls_hdr.ls_type) {
572 ND_TCHECK(lsap->lsa_un.un_rla.rla_flags);
573 ND_PRINT((ndo, "\n\t Router LSA Options: [%s]",
574 bittok2str(ospf_rla_flag_values, "none", lsap->lsa_un.un_rla.rla_flags)));
576 ND_TCHECK(lsap->lsa_un.un_rla.rla_count);
577 j = EXTRACT_16BITS(&lsap->lsa_un.un_rla.rla_count);
578 ND_TCHECK(lsap->lsa_un.un_rla.rla_link);
579 rlp = lsap->lsa_un.un_rla.rla_link;
582 switch (rlp->un_tos.link.link_type) {
584 case RLA_TYPE_VIRTUAL:
585 ND_PRINT((ndo, "\n\t Virtual Link: Neighbor Router-ID: %s, Interface Address: %s",
586 ipaddr_string(ndo, &rlp->link_id),
587 ipaddr_string(ndo, &rlp->link_data)));
590 case RLA_TYPE_ROUTER:
591 ND_PRINT((ndo, "\n\t Neighbor Router-ID: %s, Interface Address: %s",
592 ipaddr_string(ndo, &rlp->link_id),
593 ipaddr_string(ndo, &rlp->link_data)));
596 case RLA_TYPE_TRANSIT:
597 ND_PRINT((ndo, "\n\t Neighbor Network-ID: %s, Interface Address: %s",
598 ipaddr_string(ndo, &rlp->link_id),
599 ipaddr_string(ndo, &rlp->link_data)));
603 ND_PRINT((ndo, "\n\t Stub Network: %s, Mask: %s",
604 ipaddr_string(ndo, &rlp->link_id),
605 ipaddr_string(ndo, &rlp->link_data)));
609 ND_PRINT((ndo, "\n\t Unknown Router Link Type (%u)",
610 rlp->un_tos.link.link_type));
614 ospf_print_tos_metrics(ndo, &rlp->un_tos);
616 rlp = (struct rlalink *)((u_char *)(rlp + 1) +
617 ((rlp->un_tos.link.link_tos_count) * sizeof(union un_tos)));
621 case LS_TYPE_NETWORK:
622 ND_TCHECK(lsap->lsa_un.un_nla.nla_mask);
623 ND_PRINT((ndo, "\n\t Mask %s\n\t Connected Routers:",
624 ipaddr_string(ndo, &lsap->lsa_un.un_nla.nla_mask)));
625 ap = lsap->lsa_un.un_nla.nla_router;
626 while ((u_char *)ap < ls_end) {
628 ND_PRINT((ndo, "\n\t %s", ipaddr_string(ndo, ap)));
634 ND_TCHECK(lsap->lsa_un.un_nla.nla_mask);
635 ND_PRINT((ndo, "\n\t Mask %s",
636 ipaddr_string(ndo, &lsap->lsa_un.un_sla.sla_mask)));
637 ND_TCHECK(lsap->lsa_un.un_sla.sla_tosmetric);
638 lp = lsap->lsa_un.un_sla.sla_tosmetric;
639 while ((u_char *)lp < ls_end) {
640 register uint32_t ul;
643 ul = EXTRACT_32BITS(lp);
644 topology = (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS;
645 ND_PRINT((ndo, "\n\t\ttopology %s(%u) metric %d",
646 tok2str(ospf_topology_values, "", topology),
648 ul & SLA_MASK_METRIC));
653 case LS_TYPE_SUM_ABR:
654 ND_TCHECK(lsap->lsa_un.un_sla.sla_tosmetric);
655 lp = lsap->lsa_un.un_sla.sla_tosmetric;
656 while ((u_char *)lp < ls_end) {
657 register uint32_t ul;
660 ul = EXTRACT_32BITS(lp);
661 topology = (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS;
662 ND_PRINT((ndo, "\n\t\ttopology %s(%u) metric %d",
663 tok2str(ospf_topology_values, "", topology),
665 ul & SLA_MASK_METRIC));
671 case LS_TYPE_NSSA: /* fall through - those LSAs share the same format */
672 ND_TCHECK(lsap->lsa_un.un_nla.nla_mask);
673 ND_PRINT((ndo, "\n\t Mask %s",
674 ipaddr_string(ndo, &lsap->lsa_un.un_asla.asla_mask)));
676 ND_TCHECK(lsap->lsa_un.un_sla.sla_tosmetric);
677 almp = lsap->lsa_un.un_asla.asla_metric;
678 while ((u_char *)almp < ls_end) {
679 register uint32_t ul;
681 ND_TCHECK(almp->asla_tosmetric);
682 ul = EXTRACT_32BITS(&almp->asla_tosmetric);
683 topology = ((ul & ASLA_MASK_TOS) >> ASLA_SHIFT_TOS);
684 ND_PRINT((ndo, "\n\t\ttopology %s(%u), type %d, metric",
685 tok2str(ospf_topology_values, "", topology),
687 (ul & ASLA_FLAG_EXTERNAL) ? 2 : 1));
688 if ((ul & ASLA_MASK_METRIC) == 0xffffff)
689 ND_PRINT((ndo, " infinite"));
691 ND_PRINT((ndo, " %d", (ul & ASLA_MASK_METRIC)));
693 ND_TCHECK(almp->asla_forward);
694 if (almp->asla_forward.s_addr) {
695 ND_PRINT((ndo, ", forward %s", ipaddr_string(ndo, &almp->asla_forward)));
697 ND_TCHECK(almp->asla_tag);
698 if (almp->asla_tag.s_addr) {
699 ND_PRINT((ndo, ", tag %s", ipaddr_string(ndo, &almp->asla_tag)));
706 /* Multicast extensions as of 23 July 1991 */
707 mcp = lsap->lsa_un.un_mcla;
708 while ((u_char *)mcp < ls_end) {
709 ND_TCHECK(mcp->mcla_vid);
710 switch (EXTRACT_32BITS(&mcp->mcla_vtype)) {
712 case MCLA_VERTEX_ROUTER:
713 ND_PRINT((ndo, "\n\t Router Router-ID %s",
714 ipaddr_string(ndo, &mcp->mcla_vid)));
717 case MCLA_VERTEX_NETWORK:
718 ND_PRINT((ndo, "\n\t Network Designated Router %s",
719 ipaddr_string(ndo, &mcp->mcla_vid)));
723 ND_PRINT((ndo, "\n\t unknown VertexType (%u)",
724 EXTRACT_32BITS(&mcp->mcla_vtype)));
731 case LS_TYPE_OPAQUE_LL: /* fall through */
732 case LS_TYPE_OPAQUE_AL:
733 case LS_TYPE_OPAQUE_DW:
735 switch (*(&lsap->ls_hdr.un_lsa_id.opaque_field.opaque_type)) {
736 case LS_OPAQUE_TYPE_RI:
737 tptr = (uint8_t *)(&lsap->lsa_un.un_ri_tlv.type);
739 while (ls_length != 0) {
740 ND_TCHECK2(*tptr, 4);
742 ND_PRINT((ndo, "\n\t Remaining LS length %u < 4", ls_length));
745 tlv_type = EXTRACT_16BITS(tptr);
746 tlv_length = EXTRACT_16BITS(tptr+2);
750 ND_PRINT((ndo, "\n\t %s TLV (%u), length: %u, value: ",
751 tok2str(lsa_opaque_ri_tlv_values,"unknown",tlv_type),
755 if (tlv_length > ls_length) {
756 ND_PRINT((ndo, "\n\t Bogus length %u > %u", tlv_length,
760 ND_TCHECK2(*tptr, tlv_length);
763 case LS_OPAQUE_RI_TLV_CAP:
764 if (tlv_length != 4) {
765 ND_PRINT((ndo, "\n\t Bogus length %u != 4", tlv_length));
768 ND_PRINT((ndo, "Capabilities: %s",
769 bittok2str(lsa_opaque_ri_tlv_cap_values, "Unknown", EXTRACT_32BITS(tptr))));
772 if (ndo->ndo_vflag <= 1) {
773 if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_length))
780 ls_length-=tlv_length;
784 case LS_OPAQUE_TYPE_GRACE:
785 if (ospf_print_grace_lsa(ndo, (uint8_t *)(&lsap->lsa_un.un_grace_tlv.type),
791 case LS_OPAQUE_TYPE_TE:
792 if (ospf_print_te_lsa(ndo, (uint8_t *)(&lsap->lsa_un.un_te_lsa_tlv.type),
799 if (ndo->ndo_vflag <= 1) {
800 if (!print_unknown_data(ndo, (uint8_t *)lsap->lsa_un.un_unknown,
808 /* do we want to see an additionally hexdump ? */
809 if (ndo->ndo_vflag> 1)
810 if (!print_unknown_data(ndo, (uint8_t *)lsap->lsa_un.un_unknown,
811 "\n\t ", ls_length)) {
821 ospf_decode_lls(netdissect_options *ndo,
822 register const struct ospfhdr *op, register u_int length)
824 register const u_char *dptr;
825 register const u_char *dataend;
826 register u_int length2;
827 register uint16_t lls_type, lls_len;
828 register uint32_t lls_flags;
830 switch (op->ospf_type) {
832 case OSPF_TYPE_HELLO:
833 if (!(op->ospf_hello.hello_options & OSPF_OPTION_L))
838 if (!(op->ospf_db.db_options & OSPF_OPTION_L))
846 /* dig deeper if LLS data is available; see RFC4813 */
847 length2 = EXTRACT_16BITS(&op->ospf_len);
848 dptr = (u_char *)op + length2;
849 dataend = (u_char *)op + length;
851 if (EXTRACT_16BITS(&op->ospf_authtype) == OSPF_AUTH_MD5) {
852 dptr = dptr + op->ospf_authdata[3];
853 length2 += op->ospf_authdata[3];
855 if (length2 >= length) {
856 ND_PRINT((ndo, "\n\t[LLS truncated]"));
859 ND_TCHECK2(*dptr, 2);
860 ND_PRINT((ndo, "\n\t LLS: checksum: 0x%04x", (u_int)EXTRACT_16BITS(dptr)));
863 ND_TCHECK2(*dptr, 2);
864 length2 = EXTRACT_16BITS(dptr);
865 ND_PRINT((ndo, ", length: %u", length2));
869 while (dptr < dataend) {
870 ND_TCHECK2(*dptr, 2);
871 lls_type = EXTRACT_16BITS(dptr);
872 ND_PRINT((ndo, "\n\t %s (%u)",
873 tok2str(ospf_lls_tlv_values,"Unknown TLV",lls_type),
876 ND_TCHECK2(*dptr, 2);
877 lls_len = EXTRACT_16BITS(dptr);
878 ND_PRINT((ndo, ", length: %u", lls_len));
884 ND_PRINT((ndo, " [should be 4]"));
887 ND_TCHECK2(*dptr, 4);
888 lls_flags = EXTRACT_32BITS(dptr);
889 ND_PRINT((ndo, "\n\t Options: 0x%08x [%s]", lls_flags,
890 bittok2str(ospf_lls_eo_options, "?", lls_flags)));
896 ND_PRINT((ndo, " [should be 20]"));
899 ND_TCHECK2(*dptr, 4);
900 ND_PRINT((ndo, "\n\t Sequence number: 0x%08x", EXTRACT_32BITS(dptr)));
913 ospf_decode_v2(netdissect_options *ndo,
914 register const struct ospfhdr *op, register const u_char *dataend)
916 register const struct in_addr *ap;
917 register const struct lsr *lsrp;
918 register const struct lsa_hdr *lshp;
919 register const struct lsa *lsap;
920 register uint32_t lsa_count,lsa_count_max;
922 switch (op->ospf_type) {
926 * Rob Coltun's special monitoring packets;
931 case OSPF_TYPE_HELLO:
932 ND_PRINT((ndo, "\n\tOptions [%s]",
933 bittok2str(ospf_option_values,"none",op->ospf_hello.hello_options)));
935 ND_TCHECK(op->ospf_hello.hello_deadint);
936 ND_PRINT((ndo, "\n\t Hello Timer %us, Dead Timer %us, Mask %s, Priority %u",
937 EXTRACT_16BITS(&op->ospf_hello.hello_helloint),
938 EXTRACT_32BITS(&op->ospf_hello.hello_deadint),
939 ipaddr_string(ndo, &op->ospf_hello.hello_mask),
940 op->ospf_hello.hello_priority));
942 ND_TCHECK(op->ospf_hello.hello_dr);
943 if (op->ospf_hello.hello_dr.s_addr != 0)
944 ND_PRINT((ndo, "\n\t Designated Router %s",
945 ipaddr_string(ndo, &op->ospf_hello.hello_dr)));
947 ND_TCHECK(op->ospf_hello.hello_bdr);
948 if (op->ospf_hello.hello_bdr.s_addr != 0)
949 ND_PRINT((ndo, ", Backup Designated Router %s",
950 ipaddr_string(ndo, &op->ospf_hello.hello_bdr)));
952 ap = op->ospf_hello.hello_neighbor;
953 if ((u_char *)ap < dataend)
954 ND_PRINT((ndo, "\n\t Neighbor List:"));
955 while ((u_char *)ap < dataend) {
957 ND_PRINT((ndo, "\n\t %s", ipaddr_string(ndo, ap)));
963 ND_TCHECK(op->ospf_db.db_options);
964 ND_PRINT((ndo, "\n\tOptions [%s]",
965 bittok2str(ospf_option_values, "none", op->ospf_db.db_options)));
966 ND_TCHECK(op->ospf_db.db_flags);
967 ND_PRINT((ndo, ", DD Flags [%s]",
968 bittok2str(ospf_dd_flag_values, "none", op->ospf_db.db_flags)));
969 ND_TCHECK(op->ospf_db.db_ifmtu);
970 if (op->ospf_db.db_ifmtu) {
971 ND_PRINT((ndo, ", MTU: %u", EXTRACT_16BITS(&op->ospf_db.db_ifmtu)));
973 ND_TCHECK(op->ospf_db.db_seq);
974 ND_PRINT((ndo, ", Sequence: 0x%08x", EXTRACT_32BITS(&op->ospf_db.db_seq)));
976 /* Print all the LS adv's */
977 lshp = op->ospf_db.db_lshdr;
978 while (((u_char *)lshp < dataend) && ospf_print_lshdr(ndo, lshp) != -1) {
983 case OSPF_TYPE_LS_REQ:
985 while ((u_char *)lsrp < dataend) {
988 ND_PRINT((ndo, "\n\t Advertising Router: %s, %s LSA (%u)",
989 ipaddr_string(ndo, &lsrp->ls_router),
990 tok2str(lsa_values,"unknown",EXTRACT_32BITS(lsrp->ls_type)),
991 EXTRACT_32BITS(&lsrp->ls_type)));
993 switch (EXTRACT_32BITS(lsrp->ls_type)) {
994 /* the LSA header for opaque LSAs was slightly changed */
995 case LS_TYPE_OPAQUE_LL:
996 case LS_TYPE_OPAQUE_AL:
997 case LS_TYPE_OPAQUE_DW:
998 ND_PRINT((ndo, ", Opaque-Type: %s LSA (%u), Opaque-ID: %u",
999 tok2str(lsa_opaque_values, "unknown",lsrp->un_ls_stateid.opaque_field.opaque_type),
1000 lsrp->un_ls_stateid.opaque_field.opaque_type,
1001 EXTRACT_24BITS(&lsrp->un_ls_stateid.opaque_field.opaque_id)));
1004 ND_PRINT((ndo, ", LSA-ID: %s",
1005 ipaddr_string(ndo, &lsrp->un_ls_stateid.ls_stateid)));
1013 case OSPF_TYPE_LS_UPDATE:
1014 lsap = op->ospf_lsu.lsu_lsa;
1015 ND_TCHECK(op->ospf_lsu.lsu_count);
1016 lsa_count_max = EXTRACT_32BITS(&op->ospf_lsu.lsu_count);
1017 ND_PRINT((ndo, ", %d LSA%s", lsa_count_max, PLURAL_SUFFIX(lsa_count_max)));
1018 for (lsa_count=1;lsa_count <= lsa_count_max;lsa_count++) {
1019 ND_PRINT((ndo, "\n\t LSA #%u", lsa_count));
1020 lsap = (const struct lsa *)ospf_print_lsa(ndo, lsap);
1026 case OSPF_TYPE_LS_ACK:
1027 lshp = op->ospf_lsa.lsa_lshdr;
1028 while (ospf_print_lshdr(ndo, lshp) != -1) {
1042 ospf_print(netdissect_options *ndo,
1043 register const u_char *bp, register u_int length,
1044 const u_char *bp2 _U_)
1046 register const struct ospfhdr *op;
1047 register const u_char *dataend;
1048 register const char *cp;
1050 op = (struct ospfhdr *)bp;
1052 /* XXX Before we do anything else, strip off the MD5 trailer */
1053 ND_TCHECK(op->ospf_authtype);
1054 if (EXTRACT_16BITS(&op->ospf_authtype) == OSPF_AUTH_MD5) {
1055 length -= OSPF_AUTH_MD5_LEN;
1056 ndo->ndo_snapend -= OSPF_AUTH_MD5_LEN;
1059 /* If the type is valid translate it, or just print the type */
1060 /* value. If it's not valid, say so and return */
1061 ND_TCHECK(op->ospf_type);
1062 cp = tok2str(type2str, "unknown LS-type", op->ospf_type);
1063 ND_PRINT((ndo, "OSPFv%u, %s, length %u", op->ospf_version, cp, length));
1067 if (!ndo->ndo_vflag) { /* non verbose - so lets bail out here */
1071 ND_TCHECK(op->ospf_len);
1072 if (length != EXTRACT_16BITS(&op->ospf_len)) {
1073 ND_PRINT((ndo, " [len %d]", EXTRACT_16BITS(&op->ospf_len)));
1076 if (length > EXTRACT_16BITS(&op->ospf_len)) {
1077 dataend = bp + EXTRACT_16BITS(&op->ospf_len);
1079 dataend = bp + length;
1082 ND_TCHECK(op->ospf_routerid);
1083 ND_PRINT((ndo, "\n\tRouter-ID %s", ipaddr_string(ndo, &op->ospf_routerid)));
1085 ND_TCHECK(op->ospf_areaid);
1086 if (op->ospf_areaid.s_addr != 0)
1087 ND_PRINT((ndo, ", Area %s", ipaddr_string(ndo, &op->ospf_areaid)));
1089 ND_PRINT((ndo, ", Backbone Area"));
1091 if (ndo->ndo_vflag) {
1092 /* Print authentication data (should we really do this?) */
1093 ND_TCHECK2(op->ospf_authdata[0], sizeof(op->ospf_authdata));
1095 ND_PRINT((ndo, ", Authentication Type: %s (%u)",
1096 tok2str(ospf_authtype_values, "unknown", EXTRACT_16BITS(&op->ospf_authtype)),
1097 EXTRACT_16BITS(&op->ospf_authtype)));
1099 switch (EXTRACT_16BITS(&op->ospf_authtype)) {
1101 case OSPF_AUTH_NONE:
1104 case OSPF_AUTH_SIMPLE:
1105 ND_PRINT((ndo, "\n\tSimple text password: "));
1106 safeputs(ndo, op->ospf_authdata, OSPF_AUTH_SIMPLE_LEN);
1110 ND_PRINT((ndo, "\n\tKey-ID: %u, Auth-Length: %u, Crypto Sequence Number: 0x%08x",
1111 *((op->ospf_authdata) + 2),
1112 *((op->ospf_authdata) + 3),
1113 EXTRACT_32BITS((op->ospf_authdata) + 4)));
1120 /* Do rest according to version. */
1121 switch (op->ospf_version) {
1124 /* ospf version 2 */
1125 if (ospf_decode_v2(ndo, op, dataend))
1127 if (length > EXTRACT_16BITS(&op->ospf_len)) {
1128 if (ospf_decode_lls(ndo, op, length))
1134 ND_PRINT((ndo, " ospf [version %d]", op->ospf_version));
1136 } /* end switch on version */
1140 ND_PRINT((ndo, "%s", tstr));