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>
33 #include "interface.h"
34 #include "addrtoname.h"
39 #define OSPF_TYPE_HELLO 1 /* Hello */
40 #define OSPF_TYPE_DD 2 /* Database Description */
41 #define OSPF_TYPE_LS_REQ 3 /* Link State Request */
42 #define OSPF_TYPE_LS_UPDATE 4 /* Link State Update */
43 #define OSPF_TYPE_LS_ACK 5 /* Link State Ack */
45 /* Options *_options */
46 #define OSPF6_OPTION_V6 0x01 /* V6 bit: A bit for peeping tom */
47 #define OSPF6_OPTION_E 0x02 /* E bit: External routes advertised */
48 #define OSPF6_OPTION_MC 0x04 /* MC bit: Multicast capable */
49 #define OSPF6_OPTION_N 0x08 /* N bit: For type-7 LSA */
50 #define OSPF6_OPTION_R 0x10 /* R bit: Router bit */
51 #define OSPF6_OPTION_DC 0x20 /* DC bit: Demand circuits */
52 /* The field is actually 24-bit (RFC5340 Section A.2). */
53 #define OSPF6_OPTION_AF 0x0100 /* AF bit: Multiple address families */
54 #define OSPF6_OPTION_L 0x0200 /* L bit: Link-local signaling (LLS) */
55 #define OSPF6_OPTION_AT 0x0400 /* AT bit: Authentication trailer */
59 #define OSPF6_DB_INIT 0x04 /* */
60 #define OSPF6_DB_MORE 0x02
61 #define OSPF6_DB_MASTER 0x01
62 #define OSPF6_DB_M6 0x10 /* IPv6 MTU */
65 #define LS_TYPE_ROUTER 1 /* router link */
66 #define LS_TYPE_NETWORK 2 /* network link */
67 #define LS_TYPE_INTER_AP 3 /* Inter-Area-Prefix */
68 #define LS_TYPE_INTER_AR 4 /* Inter-Area-Router */
69 #define LS_TYPE_ASE 5 /* ASE */
70 #define LS_TYPE_GROUP 6 /* Group membership */
71 #define LS_TYPE_NSSA 7 /* NSSA */
72 #define LS_TYPE_LINK 8 /* Link LSA */
73 #define LS_TYPE_INTRA_AP 9 /* Intra-Area-Prefix */
74 #define LS_TYPE_INTRA_ATE 10 /* Intra-Area-TE */
75 #define LS_TYPE_GRACE 11 /* Grace LSA */
76 #define LS_TYPE_RI 12 /* Router information */
77 #define LS_TYPE_INTER_ASTE 13 /* Inter-AS-TE */
78 #define LS_TYPE_L1VPN 14 /* L1VPN */
79 #define LS_TYPE_MASK 0x1fff
81 #define LS_SCOPE_LINKLOCAL 0x0000
82 #define LS_SCOPE_AREA 0x2000
83 #define LS_SCOPE_AS 0x4000
84 #define LS_SCOPE_MASK 0x6000
85 #define LS_SCOPE_U 0x8000
87 /* rla_link.link_type */
88 #define RLA_TYPE_ROUTER 1 /* point-to-point to another router */
89 #define RLA_TYPE_TRANSIT 2 /* connection to transit network */
90 #define RLA_TYPE_VIRTUAL 4 /* virtual link */
93 #define RLA_FLAG_B 0x01
94 #define RLA_FLAG_E 0x02
95 #define RLA_FLAG_V 0x04
96 #define RLA_FLAG_W 0x08
97 #define RLA_FLAG_N 0x10
99 /* lsa_prefix options */
100 #define LSA_PREFIX_OPT_NU 0x01
101 #define LSA_PREFIX_OPT_LA 0x02
102 #define LSA_PREFIX_OPT_MC 0x04
103 #define LSA_PREFIX_OPT_P 0x08
104 #define LSA_PREFIX_OPT_DN 0x10
106 /* sla_tosmetric breakdown */
107 #define SLA_MASK_TOS 0x7f000000
108 #define SLA_MASK_METRIC 0x00ffffff
109 #define SLA_SHIFT_TOS 24
112 #define ASLA_FLAG_FWDADDR 0x02000000
113 #define ASLA_FLAG_ROUTETAG 0x01000000
114 #define ASLA_MASK_METRIC 0x00ffffff
116 /* RFC6506 Section 4.1 */
117 #define OSPF6_AT_HDRLEN 16U
118 #define OSPF6_AUTH_TYPE_HMAC 0x0001
120 typedef uint32_t rtrid_t;
122 /* link state advertisement header */
133 /* Length of an IPv6 address, in bytes. */
134 #define IPV6_ADDR_LEN_BYTES (128/8)
139 uint16_t lsa_p_metric;
140 uint8_t lsa_p_prefix[IPV6_ADDR_LEN_BYTES]; /* maximum length */
143 /* link state advertisement */
145 struct lsa6_hdr ls_hdr;
147 /* Link state types */
149 /* Router links advertisements */
155 #define rla_flags rla_flgandopt.flg
156 #define rla_options rla_flgandopt.opt
159 uint8_t link_zero[1];
160 uint16_t link_metric;
164 } rla_link[1]; /* may repeat */
167 /* Network links advertisements */
169 uint32_t nla_options;
170 rtrid_t nla_router[1]; /* may repeat */
173 /* Inter Area Prefix LSA */
175 uint32_t inter_ap_metric;
176 struct lsa6_prefix inter_ap_prefix[1];
179 /* AS external links advertisements */
181 uint32_t asla_metric;
182 struct lsa6_prefix asla_prefix[1];
183 /* some optional fields follow */
187 /* Summary links advertisements */
189 struct in_addr sla_mask;
190 uint32_t sla_tosmetric[1]; /* may repeat */
193 /* Multicast group membership */
196 struct in_addr mcla_vid;
208 #define llsa_priority llsa_priandopt.pri
209 #define llsa_options llsa_priandopt.opt
210 struct in6_addr llsa_lladdr;
211 uint32_t llsa_nprefix;
212 struct lsa6_prefix llsa_prefix[1];
215 /* Intra-Area-Prefix */
217 uint16_t intra_ap_nprefix;
218 uint16_t intra_ap_lstype;
219 rtrid_t intra_ap_lsid;
220 rtrid_t intra_ap_rtid;
221 struct lsa6_prefix intra_ap_prefix[1];
230 uint8_t ospf6_version;
233 rtrid_t ospf6_routerid;
234 rtrid_t ospf6_areaid;
235 uint16_t ospf6_chksum;
236 uint8_t ospf6_instanceid;
241 * The OSPF6 header length is 16 bytes, regardless of how your compiler
242 * might choose to pad the above structure.
244 #define OSPF6HDR_LEN 16
253 #define hello_priority hello_priandopt.pri
254 #define hello_options hello_priandopt.opt
255 uint16_t hello_helloint;
256 uint16_t hello_deadint;
259 rtrid_t hello_neighbor[1]; /* may repeat */
262 /* Database Description packet */
269 struct lsa6_hdr db_lshdr[1]; /* may repeat */
272 /* Link State Request */
280 /* Link State Update */
283 struct lsa6 lsu_lsa[1]; /* may repeat */
286 static const char tstr[] = " [|ospf3]";
288 static const struct tok ospf6_option_values[] = {
289 { OSPF6_OPTION_V6, "V6" },
290 { OSPF6_OPTION_E, "External" },
291 { OSPF6_OPTION_MC, "Deprecated" },
292 { OSPF6_OPTION_N, "NSSA" },
293 { OSPF6_OPTION_R, "Router" },
294 { OSPF6_OPTION_DC, "Demand Circuit" },
295 { OSPF6_OPTION_AF, "AFs Support" },
296 { OSPF6_OPTION_L, "LLS" },
297 { OSPF6_OPTION_AT, "Authentication Trailer" },
301 static const struct tok ospf6_rla_flag_values[] = {
302 { RLA_FLAG_B, "ABR" },
303 { RLA_FLAG_E, "External" },
304 { RLA_FLAG_V, "Virtual-Link Endpoint" },
305 { RLA_FLAG_W, "Wildcard Receiver" },
306 { RLA_FLAG_N, "NSSA Translator" },
310 static const struct tok ospf6_asla_flag_values[] = {
311 { ASLA_FLAG_EXTERNAL, "External Type 2" },
312 { ASLA_FLAG_FWDADDR, "Forwarding" },
313 { ASLA_FLAG_ROUTETAG, "Tag" },
317 static const struct tok ospf6_type_values[] = {
318 { OSPF_TYPE_HELLO, "Hello" },
319 { OSPF_TYPE_DD, "Database Description" },
320 { OSPF_TYPE_LS_REQ, "LS-Request" },
321 { OSPF_TYPE_LS_UPDATE, "LS-Update" },
322 { OSPF_TYPE_LS_ACK, "LS-Ack" },
326 static const struct tok ospf6_lsa_values[] = {
327 { LS_TYPE_ROUTER, "Router" },
328 { LS_TYPE_NETWORK, "Network" },
329 { LS_TYPE_INTER_AP, "Inter-Area Prefix" },
330 { LS_TYPE_INTER_AR, "Inter-Area Router" },
331 { LS_TYPE_ASE, "External" },
332 { LS_TYPE_GROUP, "Deprecated" },
333 { LS_TYPE_NSSA, "NSSA" },
334 { LS_TYPE_LINK, "Link" },
335 { LS_TYPE_INTRA_AP, "Intra-Area Prefix" },
336 { LS_TYPE_INTRA_ATE, "Intra-Area TE" },
337 { LS_TYPE_GRACE, "Grace" },
338 { LS_TYPE_RI, "Router Information" },
339 { LS_TYPE_INTER_ASTE, "Inter-AS-TE" },
340 { LS_TYPE_L1VPN, "Layer 1 VPN" },
344 static const struct tok ospf6_ls_scope_values[] = {
345 { LS_SCOPE_LINKLOCAL, "Link Local" },
346 { LS_SCOPE_AREA, "Area Local" },
347 { LS_SCOPE_AS, "Domain Wide" },
351 static const struct tok ospf6_dd_flag_values[] = {
352 { OSPF6_DB_INIT, "Init" },
353 { OSPF6_DB_MORE, "More" },
354 { OSPF6_DB_MASTER, "Master" },
355 { OSPF6_DB_M6, "IPv6 MTU" },
359 static const struct tok ospf6_lsa_prefix_option_values[] = {
360 { LSA_PREFIX_OPT_NU, "No Unicast" },
361 { LSA_PREFIX_OPT_LA, "Local address" },
362 { LSA_PREFIX_OPT_MC, "Deprecated" },
363 { LSA_PREFIX_OPT_P, "Propagate" },
364 { LSA_PREFIX_OPT_DN, "Down" },
368 static const struct tok ospf6_auth_type_str[] = {
369 { OSPF6_AUTH_TYPE_HMAC, "HMAC" },
374 ospf6_print_ls_type(netdissect_options *ndo,
375 register u_int ls_type, register const rtrid_t *ls_stateid)
377 ND_PRINT((ndo, "\n\t %s LSA (%d), %s Scope%s, LSA-ID %s",
378 tok2str(ospf6_lsa_values, "Unknown", ls_type & LS_TYPE_MASK),
379 ls_type & LS_TYPE_MASK,
380 tok2str(ospf6_ls_scope_values, "Unknown", ls_type & LS_SCOPE_MASK),
381 ls_type &0x8000 ? ", transitive" : "", /* U-bit */
382 ipaddr_string(ndo, ls_stateid)));
386 ospf6_print_lshdr(netdissect_options *ndo,
387 register const struct lsa6_hdr *lshp, const u_char *dataend)
389 if ((u_char *)(lshp + 1) > dataend)
391 ND_TCHECK(lshp->ls_type);
392 ND_TCHECK(lshp->ls_seq);
394 ND_PRINT((ndo, "\n\t Advertising Router %s, seq 0x%08x, age %us, length %u",
395 ipaddr_string(ndo, &lshp->ls_router),
396 EXTRACT_32BITS(&lshp->ls_seq),
397 EXTRACT_16BITS(&lshp->ls_age),
398 EXTRACT_16BITS(&lshp->ls_length)-(u_int)sizeof(struct lsa6_hdr)));
400 ospf6_print_ls_type(ndo, EXTRACT_16BITS(&lshp->ls_type), &lshp->ls_stateid);
408 ospf6_print_lsaprefix(netdissect_options *ndo,
409 const uint8_t *tptr, u_int lsa_length)
411 const struct lsa6_prefix *lsapp = (struct lsa6_prefix *)tptr;
413 struct in6_addr prefix;
415 if (lsa_length < sizeof (*lsapp) - IPV6_ADDR_LEN_BYTES)
417 lsa_length -= sizeof (*lsapp) - IPV6_ADDR_LEN_BYTES;
418 ND_TCHECK2(*lsapp, sizeof (*lsapp) - IPV6_ADDR_LEN_BYTES);
419 wordlen = (lsapp->lsa_p_len + 31) / 32;
420 if (wordlen * 4 > sizeof(struct in6_addr)) {
421 ND_PRINT((ndo, " bogus prefixlen /%d", lsapp->lsa_p_len));
424 if (lsa_length < wordlen * 4)
426 lsa_length -= wordlen * 4;
427 ND_TCHECK2(lsapp->lsa_p_prefix, wordlen * 4);
428 memset(&prefix, 0, sizeof(prefix));
429 memcpy(&prefix, lsapp->lsa_p_prefix, wordlen * 4);
430 ND_PRINT((ndo, "\n\t\t%s/%d", ip6addr_string(ndo, &prefix),
432 if (lsapp->lsa_p_opt) {
433 ND_PRINT((ndo, ", Options [%s]",
434 bittok2str(ospf6_lsa_prefix_option_values,
435 "none", lsapp->lsa_p_opt)));
437 ND_PRINT((ndo, ", metric %u", EXTRACT_16BITS(&lsapp->lsa_p_metric)));
438 return sizeof(*lsapp) - IPV6_ADDR_LEN_BYTES + wordlen * 4;
446 * Print a single link state advertisement. If truncated return 1, else 0.
449 ospf6_print_lsa(netdissect_options *ndo,
450 register const struct lsa6 *lsap, const u_char *dataend)
452 register const struct rlalink6 *rlp;
454 register const struct tos_metric *tosp;
456 register const rtrid_t *ap;
458 register const struct aslametric *almp;
459 register const struct mcla *mcp;
461 register const struct llsa *llsap;
462 register const struct lsa6_prefix *lsapp;
464 register const uint32_t *lp;
466 register u_int prefixes;
467 register int bytelen;
468 register u_int length, lsa_length;
472 if (ospf6_print_lshdr(ndo, &lsap->ls_hdr, dataend))
474 ND_TCHECK(lsap->ls_hdr.ls_length);
475 length = EXTRACT_16BITS(&lsap->ls_hdr.ls_length);
478 * The LSA length includes the length of the header;
479 * it must have a value that's at least that length.
480 * If it does, find the length of what follows the
483 if (length < sizeof(struct lsa6_hdr) || (u_char *)lsap + length > dataend)
485 lsa_length = length - sizeof(struct lsa6_hdr);
486 tptr = (uint8_t *)lsap+sizeof(struct lsa6_hdr);
488 switch (EXTRACT_16BITS(&lsap->ls_hdr.ls_type)) {
489 case LS_TYPE_ROUTER | LS_SCOPE_AREA:
490 if (lsa_length < sizeof (lsap->lsa_un.un_rla.rla_options))
492 lsa_length -= sizeof (lsap->lsa_un.un_rla.rla_options);
493 ND_TCHECK(lsap->lsa_un.un_rla.rla_options);
494 ND_PRINT((ndo, "\n\t Options [%s]",
495 bittok2str(ospf6_option_values, "none",
496 EXTRACT_32BITS(&lsap->lsa_un.un_rla.rla_options))));
497 ND_PRINT((ndo, ", RLA-Flags [%s]",
498 bittok2str(ospf6_rla_flag_values, "none",
499 lsap->lsa_un.un_rla.rla_flags)));
501 rlp = lsap->lsa_un.un_rla.rla_link;
502 while (lsa_length != 0) {
503 if (lsa_length < sizeof (*rlp))
505 lsa_length -= sizeof (*rlp);
507 switch (rlp->link_type) {
509 case RLA_TYPE_VIRTUAL:
510 ND_PRINT((ndo, "\n\t Virtual Link: Neighbor Router-ID %s"
511 "\n\t Neighbor Interface-ID %s, Interface %s",
512 ipaddr_string(ndo, &rlp->link_nrtid),
513 ipaddr_string(ndo, &rlp->link_nifid),
514 ipaddr_string(ndo, &rlp->link_ifid)));
517 case RLA_TYPE_ROUTER:
518 ND_PRINT((ndo, "\n\t Neighbor Router-ID %s"
519 "\n\t Neighbor Interface-ID %s, Interface %s",
520 ipaddr_string(ndo, &rlp->link_nrtid),
521 ipaddr_string(ndo, &rlp->link_nifid),
522 ipaddr_string(ndo, &rlp->link_ifid)));
525 case RLA_TYPE_TRANSIT:
526 ND_PRINT((ndo, "\n\t Neighbor Network-ID %s"
527 "\n\t Neighbor Interface-ID %s, Interface %s",
528 ipaddr_string(ndo, &rlp->link_nrtid),
529 ipaddr_string(ndo, &rlp->link_nifid),
530 ipaddr_string(ndo, &rlp->link_ifid)));
534 ND_PRINT((ndo, "\n\t Unknown Router Links Type 0x%02x",
538 ND_PRINT((ndo, ", metric %d", EXTRACT_16BITS(&rlp->link_metric)));
543 case LS_TYPE_NETWORK | LS_SCOPE_AREA:
544 if (lsa_length < sizeof (lsap->lsa_un.un_nla.nla_options))
546 lsa_length -= sizeof (lsap->lsa_un.un_nla.nla_options);
547 ND_TCHECK(lsap->lsa_un.un_nla.nla_options);
548 ND_PRINT((ndo, "\n\t Options [%s]",
549 bittok2str(ospf6_option_values, "none",
550 EXTRACT_32BITS(&lsap->lsa_un.un_nla.nla_options))));
552 ND_PRINT((ndo, "\n\t Connected Routers:"));
553 ap = lsap->lsa_un.un_nla.nla_router;
554 while (lsa_length != 0) {
555 if (lsa_length < sizeof (*ap))
557 lsa_length -= sizeof (*ap);
559 ND_PRINT((ndo, "\n\t\t%s", ipaddr_string(ndo, ap)));
564 case LS_TYPE_INTER_AP | LS_SCOPE_AREA:
565 if (lsa_length < sizeof (lsap->lsa_un.un_inter_ap.inter_ap_metric))
567 lsa_length -= sizeof (lsap->lsa_un.un_inter_ap.inter_ap_metric);
568 ND_TCHECK(lsap->lsa_un.un_inter_ap.inter_ap_metric);
569 ND_PRINT((ndo, ", metric %u",
570 EXTRACT_32BITS(&lsap->lsa_un.un_inter_ap.inter_ap_metric) & SLA_MASK_METRIC));
572 tptr = (uint8_t *)lsap->lsa_un.un_inter_ap.inter_ap_prefix;
573 while (lsa_length != 0) {
574 bytelen = ospf6_print_lsaprefix(ndo, tptr, lsa_length);
577 lsa_length -= bytelen;
582 case LS_TYPE_ASE | LS_SCOPE_AS:
583 if (lsa_length < sizeof (lsap->lsa_un.un_asla.asla_metric))
585 lsa_length -= sizeof (lsap->lsa_un.un_asla.asla_metric);
586 ND_TCHECK(lsap->lsa_un.un_asla.asla_metric);
587 flags32 = EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric);
588 ND_PRINT((ndo, "\n\t Flags [%s]",
589 bittok2str(ospf6_asla_flag_values, "none", flags32)));
590 ND_PRINT((ndo, " metric %u",
591 EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric) &
594 tptr = (uint8_t *)lsap->lsa_un.un_asla.asla_prefix;
595 lsapp = (struct lsa6_prefix *)tptr;
596 bytelen = ospf6_print_lsaprefix(ndo, tptr, lsa_length);
599 lsa_length -= bytelen;
602 if ((flags32 & ASLA_FLAG_FWDADDR) != 0) {
603 struct in6_addr *fwdaddr6;
605 fwdaddr6 = (struct in6_addr *)tptr;
606 if (lsa_length < sizeof (*fwdaddr6))
608 lsa_length -= sizeof (*fwdaddr6);
609 ND_TCHECK(*fwdaddr6);
610 ND_PRINT((ndo, " forward %s",
611 ip6addr_string(ndo, fwdaddr6)));
612 tptr += sizeof(*fwdaddr6);
615 if ((flags32 & ASLA_FLAG_ROUTETAG) != 0) {
616 if (lsa_length < sizeof (uint32_t))
618 lsa_length -= sizeof (uint32_t);
619 ND_TCHECK(*(uint32_t *)tptr);
620 ND_PRINT((ndo, " tag %s",
621 ipaddr_string(ndo, (uint32_t *)tptr)));
622 tptr += sizeof(uint32_t);
625 if (lsapp->lsa_p_metric) {
626 if (lsa_length < sizeof (uint32_t))
628 lsa_length -= sizeof (uint32_t);
629 ND_TCHECK(*(uint32_t *)tptr);
630 ND_PRINT((ndo, " RefLSID: %s",
631 ipaddr_string(ndo, (uint32_t *)tptr)));
632 tptr += sizeof(uint32_t);
638 llsap = &lsap->lsa_un.un_llsa;
639 if (lsa_length < sizeof (llsap->llsa_priandopt))
641 lsa_length -= sizeof (llsap->llsa_priandopt);
642 ND_TCHECK(llsap->llsa_priandopt);
643 ND_PRINT((ndo, "\n\t Options [%s]",
644 bittok2str(ospf6_option_values, "none",
645 EXTRACT_32BITS(&llsap->llsa_options))));
647 if (lsa_length < sizeof (llsap->llsa_lladdr) + sizeof (llsap->llsa_nprefix))
649 lsa_length -= sizeof (llsap->llsa_lladdr) + sizeof (llsap->llsa_nprefix);
650 prefixes = EXTRACT_32BITS(&llsap->llsa_nprefix);
651 ND_PRINT((ndo, "\n\t Priority %d, Link-local address %s, Prefixes %d:",
652 llsap->llsa_priority,
653 ip6addr_string(ndo, &llsap->llsa_lladdr),
656 tptr = (uint8_t *)llsap->llsa_prefix;
657 while (prefixes > 0) {
658 bytelen = ospf6_print_lsaprefix(ndo, tptr, lsa_length);
662 lsa_length -= bytelen;
667 case LS_TYPE_INTRA_AP | LS_SCOPE_AREA:
668 /* Intra-Area-Prefix LSA */
669 if (lsa_length < sizeof (lsap->lsa_un.un_intra_ap.intra_ap_rtid))
671 lsa_length -= sizeof (lsap->lsa_un.un_intra_ap.intra_ap_rtid);
672 ND_TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_rtid);
673 ospf6_print_ls_type(ndo,
674 EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_lstype),
675 &lsap->lsa_un.un_intra_ap.intra_ap_lsid);
677 if (lsa_length < sizeof (lsap->lsa_un.un_intra_ap.intra_ap_nprefix))
679 lsa_length -= sizeof (lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
680 ND_TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
681 prefixes = EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
682 ND_PRINT((ndo, "\n\t Prefixes %d:", prefixes));
684 tptr = (uint8_t *)lsap->lsa_un.un_intra_ap.intra_ap_prefix;
685 while (prefixes > 0) {
686 bytelen = ospf6_print_lsaprefix(ndo, tptr, lsa_length);
690 lsa_length -= bytelen;
695 case LS_TYPE_GRACE | LS_SCOPE_LINKLOCAL:
696 if (ospf_print_grace_lsa(ndo, tptr, lsa_length) == -1) {
701 case LS_TYPE_INTRA_ATE | LS_SCOPE_LINKLOCAL:
702 if (ospf_print_te_lsa(ndo, tptr, lsa_length) == -1) {
708 if(!print_unknown_data(ndo,tptr,
722 ospf6_decode_v3(netdissect_options *ndo,
723 register const struct ospf6hdr *op,
724 register const u_char *dataend)
726 register const rtrid_t *ap;
727 register const struct lsr6 *lsrp;
728 register const struct lsa6_hdr *lshp;
729 register const struct lsa6 *lsap;
732 switch (op->ospf6_type) {
734 case OSPF_TYPE_HELLO: {
735 register const struct hello6 *hellop = (const struct hello6 *)((uint8_t *)op + OSPF6HDR_LEN);
737 ND_PRINT((ndo, "\n\tOptions [%s]",
738 bittok2str(ospf6_option_values, "none",
739 EXTRACT_32BITS(&hellop->hello_options))));
741 ND_TCHECK(hellop->hello_deadint);
742 ND_PRINT((ndo, "\n\t Hello Timer %us, Dead Timer %us, Interface-ID %s, Priority %u",
743 EXTRACT_16BITS(&hellop->hello_helloint),
744 EXTRACT_16BITS(&hellop->hello_deadint),
745 ipaddr_string(ndo, &hellop->hello_ifid),
746 hellop->hello_priority));
748 ND_TCHECK(hellop->hello_dr);
749 if (EXTRACT_32BITS(&hellop->hello_dr) != 0)
750 ND_PRINT((ndo, "\n\t Designated Router %s",
751 ipaddr_string(ndo, &hellop->hello_dr)));
752 ND_TCHECK(hellop->hello_bdr);
753 if (EXTRACT_32BITS(&hellop->hello_bdr) != 0)
754 ND_PRINT((ndo, ", Backup Designated Router %s",
755 ipaddr_string(ndo, &hellop->hello_bdr)));
756 if (ndo->ndo_vflag > 1) {
757 ND_PRINT((ndo, "\n\t Neighbor List:"));
758 ap = hellop->hello_neighbor;
759 while ((u_char *)ap < dataend) {
761 ND_PRINT((ndo, "\n\t %s", ipaddr_string(ndo, ap)));
769 register const struct dd6 *ddp = (const struct dd6 *)((uint8_t *)op + OSPF6HDR_LEN);
771 ND_TCHECK(ddp->db_options);
772 ND_PRINT((ndo, "\n\tOptions [%s]",
773 bittok2str(ospf6_option_values, "none",
774 EXTRACT_32BITS(&ddp->db_options))));
775 ND_TCHECK(ddp->db_flags);
776 ND_PRINT((ndo, ", DD Flags [%s]",
777 bittok2str(ospf6_dd_flag_values,"none",ddp->db_flags)));
779 ND_TCHECK(ddp->db_seq);
780 ND_PRINT((ndo, ", MTU %u, DD-Sequence 0x%08x",
781 EXTRACT_16BITS(&ddp->db_mtu),
782 EXTRACT_32BITS(&ddp->db_seq)));
783 if (ndo->ndo_vflag > 1) {
784 /* Print all the LS adv's */
785 lshp = ddp->db_lshdr;
786 while ((u_char *)lshp < dataend) {
787 if (ospf6_print_lshdr(ndo, lshp++, dataend))
794 case OSPF_TYPE_LS_REQ:
795 if (ndo->ndo_vflag > 1) {
796 lsrp = (const struct lsr6 *)((uint8_t *)op + OSPF6HDR_LEN);
797 while ((u_char *)lsrp < dataend) {
799 ND_PRINT((ndo, "\n\t Advertising Router %s",
800 ipaddr_string(ndo, &lsrp->ls_router)));
801 ospf6_print_ls_type(ndo, EXTRACT_16BITS(&lsrp->ls_type),
808 case OSPF_TYPE_LS_UPDATE:
809 if (ndo->ndo_vflag > 1) {
810 register const struct lsu6 *lsup = (const struct lsu6 *)((uint8_t *)op + OSPF6HDR_LEN);
812 ND_TCHECK(lsup->lsu_count);
813 i = EXTRACT_32BITS(&lsup->lsu_count);
814 lsap = lsup->lsu_lsa;
815 while ((u_char *)lsap < dataend && i--) {
816 if (ospf6_print_lsa(ndo, lsap, dataend))
818 lsap = (struct lsa6 *)((u_char *)lsap +
819 EXTRACT_16BITS(&lsap->ls_hdr.ls_length));
824 case OSPF_TYPE_LS_ACK:
825 if (ndo->ndo_vflag > 1) {
826 lshp = (const struct lsa6_hdr *)((uint8_t *)op + OSPF6HDR_LEN);
827 while ((u_char *)lshp < dataend) {
828 if (ospf6_print_lshdr(ndo, lshp++, dataend))
842 /* RFC5613 Section 2.2 (w/o the TLVs) */
844 ospf6_print_lls(netdissect_options *ndo,
845 const u_char *cp, const u_int len)
851 if (len < OSPF_LLS_HDRLEN)
855 ND_PRINT((ndo, "\n\tLLS Checksum 0x%04x", EXTRACT_16BITS(cp)));
857 /* LLS Data Length */
859 llsdatalen = EXTRACT_16BITS(cp);
860 ND_PRINT((ndo, ", Data Length %u", llsdatalen));
861 if (llsdatalen < OSPF_LLS_HDRLEN || llsdatalen > len)
865 ND_TCHECK2(*cp, llsdatalen - OSPF_LLS_HDRLEN);
866 /* FIXME: code in print-ospf.c can be reused to decode the TLVs */
873 /* RFC6506 Section 4.1 */
875 ospf6_decode_at(netdissect_options *ndo,
876 const u_char *cp, const u_int len)
878 uint16_t authdatalen;
882 if (len < OSPF6_AT_HDRLEN)
884 /* Authentication Type */
886 ND_PRINT((ndo, "\n\tAuthentication Type %s", tok2str(ospf6_auth_type_str, "unknown (0x%04x)", EXTRACT_16BITS(cp))));
890 authdatalen = EXTRACT_16BITS(cp);
891 ND_PRINT((ndo, ", Length %u", authdatalen));
892 if (authdatalen < OSPF6_AT_HDRLEN || authdatalen > len)
898 /* Security Association ID */
900 ND_PRINT((ndo, ", SAID %u", EXTRACT_16BITS(cp)));
902 /* Cryptographic Sequence Number (High-Order 32 Bits) */
904 ND_PRINT((ndo, ", CSN 0x%08x", EXTRACT_32BITS(cp)));
906 /* Cryptographic Sequence Number (Low-Order 32 Bits) */
908 ND_PRINT((ndo, ":%08x", EXTRACT_32BITS(cp)));
910 /* Authentication Data */
911 ND_TCHECK2(*cp, authdatalen - OSPF6_AT_HDRLEN);
912 if (ndo->ndo_vflag > 1)
913 print_unknown_data(ndo,cp, "\n\tAuthentication Data ", authdatalen - OSPF6_AT_HDRLEN);
920 /* The trailing data may include LLS and/or AT data (in this specific order).
921 * LLS data may be present only in Hello and DBDesc packets with the L-bit set.
922 * AT data may be present in Hello and DBDesc packets with the AT-bit set or in
923 * any other packet type, thus decode the AT data regardless of the AT-bit.
926 ospf6_decode_v3_trailer(netdissect_options *ndo,
927 const struct ospf6hdr *op, const u_char *cp, const unsigned len)
933 if (op->ospf6_type == OSPF_TYPE_HELLO) {
934 const struct hello6 *hellop = (const struct hello6 *)((uint8_t *)op + OSPF6HDR_LEN);
935 if (EXTRACT_32BITS(&hellop->hello_options) & OSPF6_OPTION_L)
937 } else if (op->ospf6_type == OSPF_TYPE_DD) {
938 const struct dd6 *ddp = (const struct dd6 *)((uint8_t *)op + OSPF6HDR_LEN);
939 if (EXTRACT_32BITS(&ddp->db_options) & OSPF6_OPTION_L)
942 if ((lls_hello || lls_dd) && (llslen = ospf6_print_lls(ndo, cp, len)) < 0)
944 return ospf6_decode_at(ndo, cp + llslen, len - llslen);
951 ospf6_print(netdissect_options *ndo,
952 register const u_char *bp, register u_int length)
954 register const struct ospf6hdr *op;
955 register const u_char *dataend;
956 register const char *cp;
959 op = (struct ospf6hdr *)bp;
961 /* If the type is valid translate it, or just print the type */
962 /* value. If it's not valid, say so and return */
963 ND_TCHECK(op->ospf6_type);
964 cp = tok2str(ospf6_type_values, "unknown packet type (%u)", op->ospf6_type);
965 ND_PRINT((ndo, "OSPFv%u, %s, length %d", op->ospf6_version, cp, length));
970 if(!ndo->ndo_vflag) { /* non verbose - so lets bail out here */
974 /* OSPFv3 data always comes first and optional trailing data may follow. */
975 ND_TCHECK(op->ospf6_len);
976 datalen = EXTRACT_16BITS(&op->ospf6_len);
977 if (datalen > length) {
978 ND_PRINT((ndo, " [len %d]", datalen));
981 dataend = bp + datalen;
983 ND_TCHECK(op->ospf6_routerid);
984 ND_PRINT((ndo, "\n\tRouter-ID %s", ipaddr_string(ndo, &op->ospf6_routerid)));
986 ND_TCHECK(op->ospf6_areaid);
987 if (EXTRACT_32BITS(&op->ospf6_areaid) != 0)
988 ND_PRINT((ndo, ", Area %s", ipaddr_string(ndo, &op->ospf6_areaid)));
990 ND_PRINT((ndo, ", Backbone Area"));
991 ND_TCHECK(op->ospf6_instanceid);
992 if (op->ospf6_instanceid)
993 ND_PRINT((ndo, ", Instance %u", op->ospf6_instanceid));
995 /* Do rest according to version. */
996 switch (op->ospf6_version) {
1000 if (ospf6_decode_v3(ndo, op, dataend) ||
1001 ospf6_decode_v3_trailer(ndo, op, dataend, length - datalen))
1004 } /* end switch on version */
1008 ND_PRINT((ndo, "%s", tstr));