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 /* \summary: Open Shortest Path First (OSPF) printer */
30 #include "netdissect-stdinc.h"
32 #include "netdissect.h"
33 #include "addrtoname.h"
40 static const struct tok ospf_option_values[] = {
41 { OSPF_OPTION_MT, "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_V, "Virtual" },
63 { RLA_FLAG_W, "Wildcard" },
64 { RLA_FLAG_NT, "Nt" },
65 { RLA_FLAG_H, "Host" },
69 static const struct tok type2str[] = {
70 { OSPF_TYPE_HELLO, "Hello" },
71 { OSPF_TYPE_DD, "Database Description" },
72 { OSPF_TYPE_LS_REQ, "LS-Request" },
73 { OSPF_TYPE_LS_UPDATE, "LS-Update" },
74 { OSPF_TYPE_LS_ACK, "LS-Ack" },
78 static const struct tok lsa_values[] = {
79 { LS_TYPE_ROUTER, "Router" },
80 { LS_TYPE_NETWORK, "Network" },
81 { LS_TYPE_SUM_IP, "Summary" },
82 { LS_TYPE_SUM_ABR, "ASBR Summary" },
83 { LS_TYPE_ASE, "External" },
84 { LS_TYPE_GROUP, "Multicast Group" },
85 { LS_TYPE_NSSA, "NSSA" },
86 { LS_TYPE_OPAQUE_LL, "Link Local Opaque" },
87 { LS_TYPE_OPAQUE_AL, "Area Local Opaque" },
88 { LS_TYPE_OPAQUE_DW, "Domain Wide Opaque" },
92 static const struct tok ospf_dd_flag_values[] = {
93 { OSPF_DB_INIT, "Init" },
94 { OSPF_DB_MORE, "More" },
95 { OSPF_DB_MASTER, "Master" },
96 { OSPF_DB_RESYNC, "OOBResync" },
100 static const struct tok lsa_opaque_values[] = {
101 { LS_OPAQUE_TYPE_TE, "Traffic Engineering" },
102 { LS_OPAQUE_TYPE_GRACE, "Graceful restart" },
103 { LS_OPAQUE_TYPE_RI, "Router Information" },
107 static const struct tok lsa_opaque_te_tlv_values[] = {
108 { LS_OPAQUE_TE_TLV_ROUTER, "Router Address" },
109 { LS_OPAQUE_TE_TLV_LINK, "Link" },
113 static const struct tok lsa_opaque_te_link_tlv_subtlv_values[] = {
114 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE, "Link Type" },
115 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID, "Link ID" },
116 { LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP, "Local Interface IP address" },
117 { LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP, "Remote Interface IP address" },
118 { LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC, "Traffic Engineering Metric" },
119 { LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW, "Maximum Bandwidth" },
120 { LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW, "Maximum Reservable Bandwidth" },
121 { LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW, "Unreserved Bandwidth" },
122 { LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP, "Administrative Group" },
123 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" },
124 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE, "Link Protection Type" },
125 { LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR, "Interface Switching Capability" },
126 { LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP, "Shared Risk Link Group" },
127 { LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS, "Bandwidth Constraints" },
131 static const struct tok lsa_opaque_grace_tlv_values[] = {
132 { LS_OPAQUE_GRACE_TLV_PERIOD, "Grace Period" },
133 { LS_OPAQUE_GRACE_TLV_REASON, "Graceful restart Reason" },
134 { LS_OPAQUE_GRACE_TLV_INT_ADDRESS, "IPv4 interface address" },
138 static const struct tok lsa_opaque_grace_tlv_reason_values[] = {
139 { LS_OPAQUE_GRACE_TLV_REASON_UNKNOWN, "Unknown" },
140 { LS_OPAQUE_GRACE_TLV_REASON_SW_RESTART, "Software Restart" },
141 { LS_OPAQUE_GRACE_TLV_REASON_SW_UPGRADE, "Software Reload/Upgrade" },
142 { LS_OPAQUE_GRACE_TLV_REASON_CP_SWITCH, "Control Processor Switch" },
146 static const struct tok lsa_opaque_te_tlv_link_type_sub_tlv_values[] = {
147 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_PTP, "Point-to-point" },
148 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_MA, "Multi-Access" },
152 static const struct tok lsa_opaque_ri_tlv_values[] = {
153 { LS_OPAQUE_RI_TLV_CAP, "Router Capabilities" },
157 static const struct tok lsa_opaque_ri_tlv_cap_values[] = {
162 { 16, "graceful restart capable" },
163 { 32, "graceful restart helper" },
164 { 64, "Stub router support" },
165 { 128, "Traffic engineering" },
166 { 256, "p2p over LAN" },
167 { 512, "path computation server" },
171 static const struct tok ospf_lls_tlv_values[] = {
172 { OSPF_LLS_EO, "Extended Options" },
173 { OSPF_LLS_MD5, "MD5 Authentication" },
177 static const struct tok ospf_lls_eo_options[] = {
178 { OSPF_LLS_EO_LR, "LSDB resync" },
179 { OSPF_LLS_EO_RS, "Restart" },
184 ospf_grace_lsa_print(netdissect_options *ndo,
185 const u_char *tptr, u_int ls_length)
187 u_int tlv_type, tlv_length;
190 while (ls_length > 0) {
193 ND_PRINT("\n\t Remaining LS length %u < 4", ls_length);
196 tlv_type = GET_BE_U_2(tptr);
197 tlv_length = GET_BE_U_2(tptr + 2);
201 ND_PRINT("\n\t %s TLV (%u), length %u, value: ",
202 tok2str(lsa_opaque_grace_tlv_values,"unknown",tlv_type),
206 if (tlv_length > ls_length) {
207 ND_PRINT("\n\t Bogus length %u > %u", tlv_length,
212 /* Infinite loop protection. */
213 if (tlv_type == 0 || tlv_length ==0) {
217 ND_TCHECK_LEN(tptr, tlv_length);
220 case LS_OPAQUE_GRACE_TLV_PERIOD:
221 if (tlv_length != 4) {
222 ND_PRINT("\n\t Bogus length %u != 4", tlv_length);
225 ND_PRINT("%us", GET_BE_U_4(tptr));
228 case LS_OPAQUE_GRACE_TLV_REASON:
229 if (tlv_length != 1) {
230 ND_PRINT("\n\t Bogus length %u != 1", tlv_length);
234 tok2str(lsa_opaque_grace_tlv_reason_values, "Unknown", GET_U_1(tptr)),
238 case LS_OPAQUE_GRACE_TLV_INT_ADDRESS:
239 if (tlv_length != 4) {
240 ND_PRINT("\n\t Bogus length %u != 4", tlv_length);
243 ND_PRINT("%s", GET_IPADDR_STRING(tptr));
247 if (ndo->ndo_vflag <= 1) {
248 if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_length))
254 /* in OSPF everything has to be 32-bit aligned, including TLVs */
255 if (tlv_length%4 != 0)
256 tlv_length+=4-(tlv_length%4);
257 ls_length-=tlv_length;
267 ospf_te_lsa_print(netdissect_options *ndo,
268 const u_char *tptr, u_int ls_length)
270 u_int tlv_type, tlv_length, subtlv_type, subtlv_length;
271 u_int priority_level, te_class, count_srlg;
272 union { /* int to float conversion buffer for several subTLVs */
277 while (ls_length != 0) {
280 ND_PRINT("\n\t Remaining LS length %u < 4", ls_length);
283 tlv_type = GET_BE_U_2(tptr);
284 tlv_length = GET_BE_U_2(tptr + 2);
288 ND_PRINT("\n\t %s TLV (%u), length: %u",
289 tok2str(lsa_opaque_te_tlv_values,"unknown",tlv_type),
293 if (tlv_length > ls_length) {
294 ND_PRINT("\n\t Bogus length %u > %u", tlv_length,
299 /* Infinite loop protection. */
300 if (tlv_type == 0 || tlv_length ==0) {
305 case LS_OPAQUE_TE_TLV_LINK:
306 while (tlv_length != 0) {
307 if (tlv_length < 4) {
308 ND_PRINT("\n\t Remaining TLV length %u < 4",
312 subtlv_type = GET_BE_U_2(tptr);
313 subtlv_length = GET_BE_U_2(tptr + 2);
317 /* Infinite loop protection */
318 if (subtlv_type == 0 || subtlv_length == 0)
321 ND_PRINT("\n\t %s subTLV (%u), length: %u",
322 tok2str(lsa_opaque_te_link_tlv_subtlv_values,"unknown",subtlv_type),
326 if (tlv_length < subtlv_length) {
327 ND_PRINT("\n\t Remaining TLV length %u < %u",
328 tlv_length + 4, subtlv_length + 4);
331 ND_TCHECK_LEN(tptr, subtlv_length);
332 switch(subtlv_type) {
333 case LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP:
334 if (subtlv_length != 4) {
338 ND_PRINT(", 0x%08x", GET_BE_U_4(tptr));
340 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID:
341 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID:
342 if (subtlv_length != 4 && subtlv_length != 8) {
343 ND_PRINT(" != 4 && != 8");
346 ND_PRINT(", %s (0x%08x)",
347 GET_IPADDR_STRING(tptr),
349 if (subtlv_length == 8) /* rfc4203 */
350 ND_PRINT(", %s (0x%08x)",
351 GET_IPADDR_STRING(tptr+4),
352 GET_BE_U_4(tptr + 4));
354 case LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP:
355 case LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP:
356 if (subtlv_length != 4) {
360 ND_PRINT(", %s", GET_IPADDR_STRING(tptr));
362 case LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW:
363 case LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW:
364 if (subtlv_length != 4) {
368 bw.i = GET_BE_U_4(tptr);
369 ND_PRINT(", %.3f Mbps", bw.f * 8 / 1000000);
371 case LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW:
372 if (subtlv_length != 32) {
376 for (te_class = 0; te_class < 8; te_class++) {
377 bw.i = GET_BE_U_4(tptr + te_class * 4);
378 ND_PRINT("\n\t\tTE-Class %u: %.3f Mbps",
383 case LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS:
384 if (subtlv_length < 4) {
388 /* BC Model Id (1 octet) + Reserved (3 octets) */
389 ND_PRINT("\n\t\tBandwidth Constraints Model ID: %s (%u)",
390 tok2str(diffserv_te_bc_values, "unknown", GET_U_1(tptr)),
392 if (subtlv_length % 4 != 0) {
393 ND_PRINT("\n\t\tlength %u != N x 4", subtlv_length);
396 if (subtlv_length > 36) {
397 ND_PRINT("\n\t\tlength %u > 36", subtlv_length);
400 /* decode BCs until the subTLV ends */
401 for (te_class = 0; te_class < (subtlv_length-4)/4; te_class++) {
402 bw.i = GET_BE_U_4(tptr + 4 + te_class * 4);
403 ND_PRINT("\n\t\t Bandwidth constraint CT%u: %.3f Mbps",
408 case LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC:
409 if (subtlv_length != 4) {
413 ND_PRINT(", Metric %u", GET_BE_U_4(tptr));
415 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE:
416 /* Protection Cap (1 octet) + Reserved ((3 octets) */
417 if (subtlv_length != 4) {
422 bittok2str(gmpls_link_prot_values, "none", GET_U_1(tptr)));
424 case LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR:
425 if (subtlv_length < 36) {
429 /* Switching Cap (1 octet) + Encoding (1) + Reserved (2) */
430 ND_PRINT("\n\t\tInterface Switching Capability: %s",
431 tok2str(gmpls_switch_cap_values, "Unknown", GET_U_1((tptr))));
432 ND_PRINT("\n\t\tLSP Encoding: %s\n\t\tMax LSP Bandwidth:",
433 tok2str(gmpls_encoding_values, "Unknown", GET_U_1((tptr + 1))));
434 for (priority_level = 0; priority_level < 8; priority_level++) {
435 bw.i = GET_BE_U_4(tptr + 4 + (priority_level * 4));
436 ND_PRINT("\n\t\t priority level %u: %.3f Mbps",
441 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE:
442 if (subtlv_length != 1) {
446 ND_PRINT(", %s (%u)",
447 tok2str(lsa_opaque_te_tlv_link_type_sub_tlv_values,"unknown",GET_U_1(tptr)),
451 case LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP:
452 if (subtlv_length % 4 != 0) {
453 ND_PRINT(" != N x 4");
456 count_srlg = subtlv_length / 4;
458 ND_PRINT("\n\t\t Shared risk group: ");
459 while (count_srlg > 0) {
460 bw.i = GET_BE_U_4(tptr);
461 ND_PRINT("%u", bw.i);
470 if (ndo->ndo_vflag <= 1) {
471 if (!print_unknown_data(ndo, tptr, "\n\t\t", subtlv_length))
476 /* in OSPF everything has to be 32-bit aligned, including subTLVs */
477 if (subtlv_length%4 != 0)
478 subtlv_length+=4-(subtlv_length%4);
480 if (tlv_length < subtlv_length) {
481 ND_PRINT("\n\t Remaining TLV length %u < %u",
482 tlv_length + 4, subtlv_length + 4);
485 tlv_length-=subtlv_length;
491 case LS_OPAQUE_TE_TLV_ROUTER:
492 if (tlv_length < 4) {
493 ND_PRINT("\n\t TLV length %u < 4", tlv_length);
496 ND_PRINT(", %s", GET_IPADDR_STRING(tptr));
500 if (ndo->ndo_vflag <= 1) {
501 if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_length))
506 /* in OSPF everything has to be 32-bit aligned, including TLVs */
507 if (tlv_length%4 != 0)
508 tlv_length+=4-(tlv_length%4);
509 if (tlv_length > ls_length) {
510 ND_PRINT("\n\t Bogus padded length %u > %u", tlv_length,
514 ls_length-=tlv_length;
521 nd_print_invalid(ndo);
526 ospf_print_lshdr(netdissect_options *ndo,
527 const struct lsa_hdr *lshp)
532 ls_length = GET_BE_U_2(lshp->ls_length);
533 if (ls_length < sizeof(struct lsa_hdr)) {
534 ND_PRINT("\n\t Bogus length %u < header (%zu)", ls_length,
535 sizeof(struct lsa_hdr));
538 ND_PRINT("\n\t Advertising Router %s, seq 0x%08x, age %us, length %zu",
539 GET_IPADDR_STRING(lshp->ls_router),
540 GET_BE_U_4(lshp->ls_seq),
541 GET_BE_U_2(lshp->ls_age),
542 ls_length - sizeof(struct lsa_hdr));
543 ls_type = GET_U_1(lshp->ls_type);
545 /* the LSA header for opaque LSAs was slightly changed */
546 case LS_TYPE_OPAQUE_LL:
547 case LS_TYPE_OPAQUE_AL:
548 case LS_TYPE_OPAQUE_DW:
549 ND_PRINT("\n\t %s LSA (%u), Opaque-Type %s LSA (%u), Opaque-ID %u",
550 tok2str(lsa_values,"unknown",ls_type),
553 tok2str(lsa_opaque_values,
555 GET_U_1(lshp->un_lsa_id.opaque_field.opaque_type)),
556 GET_U_1(lshp->un_lsa_id.opaque_field.opaque_type),
557 GET_BE_U_3(lshp->un_lsa_id.opaque_field.opaque_id)
562 /* all other LSA types use regular style LSA headers */
564 ND_PRINT("\n\t %s LSA (%u), LSA-ID: %s",
565 tok2str(lsa_values,"unknown",ls_type),
567 GET_IPADDR_STRING(lshp->un_lsa_id.lsa_id));
570 ND_PRINT("\n\t Options: [%s]",
571 bittok2str(ospf_option_values, "none", GET_U_1(lshp->ls_options)));
576 /* draft-ietf-ospf-mt-09 */
577 static const struct tok ospf_topology_values[] = {
585 * Print all the per-topology metrics.
588 ospf_print_tos_metrics(netdissect_options *ndo,
589 const union un_tos *tos)
595 toscount = GET_U_1(tos->link.link_tos_count)+1;
599 * All but the first metric contain a valid topology id.
601 while (toscount != 0) {
602 tos_type = GET_U_1(tos->metrics.tos_type);
603 ND_PRINT("\n\t\ttopology %s (%u), metric %u",
604 tok2str(ospf_topology_values, "Unknown",
605 metric_count ? tos_type : 0),
606 metric_count ? tos_type : 0,
607 GET_BE_U_2(tos->metrics.tos_metric));
615 * Print a single link state advertisement. If truncated or if LSA length
616 * field is less than the length of the LSA header, return NULl, else
617 * return pointer to data past end of LSA.
619 static const uint8_t *
620 ospf_print_lsa(netdissect_options *ndo,
621 const struct lsa *lsap)
623 const uint8_t *ls_end;
624 const struct rlalink *rlp;
626 const struct aslametric *almp;
627 const struct mcla *mcp;
629 u_int tlv_type, tlv_length, rla_count, topology;
630 int ospf_print_lshdr_ret;
634 tptr = (const uint8_t *)lsap->lsa_un.un_unknown; /* squelch compiler warnings */
635 ospf_print_lshdr_ret = ospf_print_lshdr(ndo, &lsap->ls_hdr);
636 if (ospf_print_lshdr_ret < 0)
638 ls_length = (u_int)ospf_print_lshdr_ret;
639 ls_end = (const uint8_t *)lsap + ls_length;
641 * ospf_print_lshdr() returns -1 if the length is too short,
642 * so we know ls_length is >= sizeof(struct lsa_hdr).
644 ls_length -= sizeof(struct lsa_hdr);
646 switch (GET_U_1(lsap->ls_hdr.ls_type)) {
649 ND_PRINT("\n\t Router LSA Options: [%s]",
650 bittok2str(ospf_rla_flag_values, "none", GET_U_1(lsap->lsa_un.un_rla.rla_flags)));
652 rla_count = GET_BE_U_2(lsap->lsa_un.un_rla.rla_count);
653 ND_TCHECK_SIZE(lsap->lsa_un.un_rla.rla_link);
654 rlp = lsap->lsa_un.un_rla.rla_link;
655 for (u_int i = rla_count; i != 0; i--) {
657 switch (GET_U_1(rlp->un_tos.link.link_type)) {
659 case RLA_TYPE_VIRTUAL:
660 ND_PRINT("\n\t Virtual Link: Neighbor Router-ID: %s, Interface Address: %s",
661 GET_IPADDR_STRING(rlp->link_id),
662 GET_IPADDR_STRING(rlp->link_data));
665 case RLA_TYPE_ROUTER:
666 ND_PRINT("\n\t Neighbor Router-ID: %s, Interface Address: %s",
667 GET_IPADDR_STRING(rlp->link_id),
668 GET_IPADDR_STRING(rlp->link_data));
671 case RLA_TYPE_TRANSIT:
672 ND_PRINT("\n\t Neighbor Network-ID: %s, Interface Address: %s",
673 GET_IPADDR_STRING(rlp->link_id),
674 GET_IPADDR_STRING(rlp->link_data));
678 ND_PRINT("\n\t Stub Network: %s, Mask: %s",
679 GET_IPADDR_STRING(rlp->link_id),
680 GET_IPADDR_STRING(rlp->link_data));
684 ND_PRINT("\n\t Unknown Router Link Type (%u)",
685 GET_U_1(rlp->un_tos.link.link_type));
689 ospf_print_tos_metrics(ndo, &rlp->un_tos);
691 rlp = (const struct rlalink *)((const u_char *)(rlp + 1) +
692 (GET_U_1(rlp->un_tos.link.link_tos_count) * sizeof(union un_tos)));
696 case LS_TYPE_NETWORK:
697 ND_PRINT("\n\t Mask %s\n\t Connected Routers:",
698 GET_IPADDR_STRING(lsap->lsa_un.un_nla.nla_mask));
699 ap = lsap->lsa_un.un_nla.nla_router;
700 while ((const u_char *)ap < ls_end) {
701 ND_PRINT("\n\t %s", GET_IPADDR_STRING(ap));
707 ND_TCHECK_4(lsap->lsa_un.un_nla.nla_mask);
708 ND_PRINT("\n\t Mask %s",
709 GET_IPADDR_STRING(lsap->lsa_un.un_sla.sla_mask));
710 ND_TCHECK_SIZE(lsap->lsa_un.un_sla.sla_tosmetric);
711 lp = (const uint8_t *)lsap->lsa_un.un_sla.sla_tosmetric;
712 while (lp < ls_end) {
716 topology = (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS;
717 ND_PRINT("\n\t\ttopology %s (%u) metric %u",
718 tok2str(ospf_topology_values, "Unknown", topology),
720 ul & SLA_MASK_METRIC);
725 case LS_TYPE_SUM_ABR:
726 ND_TCHECK_SIZE(lsap->lsa_un.un_sla.sla_tosmetric);
727 lp = (const uint8_t *)lsap->lsa_un.un_sla.sla_tosmetric;
728 while (lp < ls_end) {
732 topology = (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS;
733 ND_PRINT("\n\t\ttopology %s (%u) metric %u",
734 tok2str(ospf_topology_values, "Unknown", topology),
736 ul & SLA_MASK_METRIC);
742 case LS_TYPE_NSSA: /* fall through - those LSAs share the same format */
743 ND_TCHECK_4(lsap->lsa_un.un_nla.nla_mask);
744 ND_PRINT("\n\t Mask %s",
745 GET_IPADDR_STRING(lsap->lsa_un.un_asla.asla_mask));
747 ND_TCHECK_SIZE(lsap->lsa_un.un_sla.sla_tosmetric);
748 almp = lsap->lsa_un.un_asla.asla_metric;
749 while ((const u_char *)almp < ls_end) {
752 ul = GET_BE_U_4(almp->asla_tosmetric);
753 topology = ((ul & ASLA_MASK_TOS) >> ASLA_SHIFT_TOS);
754 ND_PRINT("\n\t\ttopology %s (%u), type %u, metric",
755 tok2str(ospf_topology_values, "Unknown", topology),
757 (ul & ASLA_FLAG_EXTERNAL) ? 2 : 1);
758 if ((ul & ASLA_MASK_METRIC) == 0xffffff)
759 ND_PRINT(" infinite");
761 ND_PRINT(" %u", (ul & ASLA_MASK_METRIC));
763 if (GET_IPV4_TO_NETWORK_ORDER(almp->asla_forward) != 0) {
764 ND_PRINT(", forward %s", GET_IPADDR_STRING(almp->asla_forward));
766 if (GET_IPV4_TO_NETWORK_ORDER(almp->asla_tag) != 0) {
767 ND_PRINT(", tag %s", GET_IPADDR_STRING(almp->asla_tag));
774 /* Multicast extensions as of 23 July 1991 */
775 mcp = lsap->lsa_un.un_mcla;
776 while ((const u_char *)mcp < ls_end) {
777 switch (GET_BE_U_4(mcp->mcla_vtype)) {
779 case MCLA_VERTEX_ROUTER:
780 ND_PRINT("\n\t Router Router-ID %s",
781 GET_IPADDR_STRING(mcp->mcla_vid));
784 case MCLA_VERTEX_NETWORK:
785 ND_PRINT("\n\t Network Designated Router %s",
786 GET_IPADDR_STRING(mcp->mcla_vid));
790 ND_PRINT("\n\t unknown VertexType (%u)",
791 GET_BE_U_4(mcp->mcla_vtype));
798 case LS_TYPE_OPAQUE_LL: /* fall through */
799 case LS_TYPE_OPAQUE_AL:
800 case LS_TYPE_OPAQUE_DW:
802 switch (GET_U_1(lsap->ls_hdr.un_lsa_id.opaque_field.opaque_type)) {
803 case LS_OPAQUE_TYPE_RI:
804 tptr = (const uint8_t *)(lsap->lsa_un.un_ri_tlv);
806 u_int ls_length_remaining = ls_length;
807 while (ls_length_remaining != 0) {
809 if (ls_length_remaining < 4) {
810 ND_PRINT("\n\t Remaining LS length %u < 4", ls_length_remaining);
813 tlv_type = GET_BE_U_2(tptr);
814 tlv_length = GET_BE_U_2(tptr + 2);
816 ls_length_remaining-=4;
818 ND_PRINT("\n\t %s TLV (%u), length: %u, value: ",
819 tok2str(lsa_opaque_ri_tlv_values,"unknown",tlv_type),
823 if (tlv_length > ls_length_remaining) {
824 ND_PRINT("\n\t Bogus length %u > remaining LS length %u", tlv_length,
825 ls_length_remaining);
828 ND_TCHECK_LEN(tptr, tlv_length);
831 case LS_OPAQUE_RI_TLV_CAP:
832 if (tlv_length != 4) {
833 ND_PRINT("\n\t Bogus length %u != 4", tlv_length);
836 ND_PRINT("Capabilities: %s",
837 bittok2str(lsa_opaque_ri_tlv_cap_values, "Unknown", GET_BE_U_4(tptr)));
840 if (ndo->ndo_vflag <= 1) {
841 if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_length))
848 ls_length_remaining-=tlv_length;
852 case LS_OPAQUE_TYPE_GRACE:
853 if (ospf_grace_lsa_print(ndo, (const u_char *)(lsap->lsa_un.un_grace_tlv),
859 case LS_OPAQUE_TYPE_TE:
860 if (ospf_te_lsa_print(ndo, (const u_char *)(lsap->lsa_un.un_te_lsa_tlv),
867 if (ndo->ndo_vflag <= 1) {
868 if (!print_unknown_data(ndo, (const uint8_t *)lsap->lsa_un.un_unknown,
876 /* do we want to see an additionally hexdump ? */
877 if (ndo->ndo_vflag> 1)
878 if (!print_unknown_data(ndo, (const uint8_t *)lsap->lsa_un.un_unknown,
879 "\n\t ", ls_length)) {
889 ospf_decode_lls(netdissect_options *ndo,
890 const struct ospfhdr *op, u_int length)
893 const u_char *dataend;
895 uint16_t lls_type, lls_len;
898 switch (GET_U_1(op->ospf_type)) {
900 case OSPF_TYPE_HELLO:
901 if (!(GET_U_1(op->ospf_hello.hello_options) & OSPF_OPTION_L))
906 if (!(GET_U_1(op->ospf_db.db_options) & OSPF_OPTION_L))
914 /* dig deeper if LLS data is available; see RFC4813 */
915 length2 = GET_BE_U_2(op->ospf_len);
916 dptr = (const u_char *)op + length2;
917 dataend = (const u_char *)op + length;
919 if (GET_BE_U_2(op->ospf_authtype) == OSPF_AUTH_MD5) {
920 dptr = dptr + GET_U_1(op->ospf_authdata + 3);
921 length2 += GET_U_1(op->ospf_authdata + 3);
923 if (length2 >= length) {
924 ND_PRINT("\n\t[LLS truncated]");
927 ND_PRINT("\n\t LLS: checksum: 0x%04x", (u_int) GET_BE_U_2(dptr));
930 length2 = GET_BE_U_2(dptr);
931 ND_PRINT(", length: %u", length2);
934 while (dptr < dataend) {
935 lls_type = GET_BE_U_2(dptr);
936 ND_PRINT("\n\t %s (%u)",
937 tok2str(ospf_lls_tlv_values,"Unknown TLV",lls_type),
940 lls_len = GET_BE_U_2(dptr);
941 ND_PRINT(", length: %u", lls_len);
947 ND_PRINT(" [should be 4]");
950 lls_flags = GET_BE_U_4(dptr);
951 ND_PRINT("\n\t Options: 0x%08x [%s]", lls_flags,
952 bittok2str(ospf_lls_eo_options, "?", lls_flags));
958 ND_PRINT(" [should be 20]");
961 ND_PRINT("\n\t Sequence number: 0x%08x", GET_BE_U_4(dptr));
970 ospf_decode_v2(netdissect_options *ndo,
971 const struct ospfhdr *op, const u_char *dataend)
974 const struct lsr *lsrp;
975 const struct lsa_hdr *lshp;
976 const struct lsa *lsap;
977 uint32_t lsa_count,lsa_count_max;
979 switch (GET_U_1(op->ospf_type)) {
981 case OSPF_TYPE_HELLO:
982 ND_PRINT("\n\tOptions [%s]",
983 bittok2str(ospf_option_values,"none",GET_U_1(op->ospf_hello.hello_options)));
985 ND_PRINT("\n\t Hello Timer %us, Dead Timer %us, Mask %s, Priority %u",
986 GET_BE_U_2(op->ospf_hello.hello_helloint),
987 GET_BE_U_4(op->ospf_hello.hello_deadint),
988 GET_IPADDR_STRING(op->ospf_hello.hello_mask),
989 GET_U_1(op->ospf_hello.hello_priority));
991 if (GET_IPV4_TO_NETWORK_ORDER(op->ospf_hello.hello_dr) != 0)
992 ND_PRINT("\n\t Designated Router %s",
993 GET_IPADDR_STRING(op->ospf_hello.hello_dr));
995 if (GET_IPV4_TO_NETWORK_ORDER(op->ospf_hello.hello_bdr) != 0)
996 ND_PRINT(", Backup Designated Router %s",
997 GET_IPADDR_STRING(op->ospf_hello.hello_bdr));
999 ap = op->ospf_hello.hello_neighbor;
1000 if ((const u_char *)ap < dataend)
1001 ND_PRINT("\n\t Neighbor List:");
1002 while ((const u_char *)ap < dataend) {
1003 ND_PRINT("\n\t %s", GET_IPADDR_STRING(ap));
1009 ND_PRINT("\n\tOptions [%s]",
1010 bittok2str(ospf_option_values, "none", GET_U_1(op->ospf_db.db_options)));
1011 ND_PRINT(", DD Flags [%s]",
1012 bittok2str(ospf_dd_flag_values, "none", GET_U_1(op->ospf_db.db_flags)));
1013 if (GET_BE_U_2(op->ospf_db.db_ifmtu)) {
1014 ND_PRINT(", MTU: %u",
1015 GET_BE_U_2(op->ospf_db.db_ifmtu));
1017 ND_PRINT(", Sequence: 0x%08x", GET_BE_U_4(op->ospf_db.db_seq));
1019 /* Print all the LS adv's */
1020 lshp = op->ospf_db.db_lshdr;
1021 while (((const u_char *)lshp < dataend) && ospf_print_lshdr(ndo, lshp) != -1) {
1026 case OSPF_TYPE_LS_REQ:
1027 lsrp = op->ospf_lsr;
1028 while ((const u_char *)lsrp < dataend) {
1029 ND_TCHECK_SIZE(lsrp);
1031 ND_PRINT("\n\t Advertising Router: %s, %s LSA (%u)",
1032 GET_IPADDR_STRING(lsrp->ls_router),
1033 tok2str(lsa_values,"unknown",GET_BE_U_4(lsrp->ls_type)),
1034 GET_BE_U_4(lsrp->ls_type));
1036 switch (GET_BE_U_4(lsrp->ls_type)) {
1037 /* the LSA header for opaque LSAs was slightly changed */
1038 case LS_TYPE_OPAQUE_LL:
1039 case LS_TYPE_OPAQUE_AL:
1040 case LS_TYPE_OPAQUE_DW:
1041 ND_PRINT(", Opaque-Type: %s LSA (%u), Opaque-ID: %u",
1042 tok2str(lsa_opaque_values, "unknown",GET_U_1(lsrp->un_ls_stateid.opaque_field.opaque_type)),
1043 GET_U_1(lsrp->un_ls_stateid.opaque_field.opaque_type),
1044 GET_BE_U_3(lsrp->un_ls_stateid.opaque_field.opaque_id));
1047 ND_PRINT(", LSA-ID: %s",
1048 GET_IPADDR_STRING(lsrp->un_ls_stateid.ls_stateid));
1056 case OSPF_TYPE_LS_UPDATE:
1057 lsap = op->ospf_lsu.lsu_lsa;
1058 lsa_count_max = GET_BE_U_4(op->ospf_lsu.lsu_count);
1059 ND_PRINT(", %u LSA%s", lsa_count_max, PLURAL_SUFFIX(lsa_count_max));
1060 for (lsa_count=1;lsa_count <= lsa_count_max;lsa_count++) {
1061 ND_PRINT("\n\t LSA #%u", lsa_count);
1062 lsap = (const struct lsa *)ospf_print_lsa(ndo, lsap);
1068 case OSPF_TYPE_LS_ACK:
1069 lshp = op->ospf_lsa.lsa_lshdr;
1070 while (ospf_print_lshdr(ndo, lshp) != -1) {
1084 ospf_print(netdissect_options *ndo,
1085 const u_char *bp, u_int length,
1086 const u_char *bp2 _U_)
1088 const struct ospfhdr *op;
1089 const u_char *dataend;
1092 ndo->ndo_protocol = "ospf2";
1093 op = (const struct ospfhdr *)bp;
1095 /* XXX Before we do anything else, strip off the MD5 trailer */
1096 if (GET_BE_U_2(op->ospf_authtype) == OSPF_AUTH_MD5) {
1097 length -= OSPF_AUTH_MD5_LEN;
1098 ndo->ndo_snapend -= OSPF_AUTH_MD5_LEN;
1101 /* If the type is valid translate it, or just print the type */
1102 /* value. If it's not valid, say so and return */
1103 cp = tok2str(type2str, "unknown LS-type %u", GET_U_1(op->ospf_type));
1104 ND_PRINT("OSPFv%u, %s, length %u", GET_U_1(op->ospf_version), cp,
1109 if (!ndo->ndo_vflag) { /* non verbose - so lets bail out here */
1113 if (length != GET_BE_U_2(op->ospf_len)) {
1114 ND_PRINT(" [len %u]", GET_BE_U_2(op->ospf_len));
1117 if (length > GET_BE_U_2(op->ospf_len)) {
1118 dataend = bp + GET_BE_U_2(op->ospf_len);
1120 dataend = bp + length;
1123 ND_PRINT("\n\tRouter-ID %s", GET_IPADDR_STRING(op->ospf_routerid));
1125 if (GET_IPV4_TO_NETWORK_ORDER(op->ospf_areaid) != 0)
1126 ND_PRINT(", Area %s", GET_IPADDR_STRING(op->ospf_areaid));
1128 ND_PRINT(", Backbone Area");
1130 if (ndo->ndo_vflag) {
1131 /* Print authentication data (should we really do this?) */
1132 ND_TCHECK_LEN(op->ospf_authdata, sizeof(op->ospf_authdata));
1134 ND_PRINT(", Authentication Type: %s (%u)",
1135 tok2str(ospf_authtype_values, "unknown", GET_BE_U_2(op->ospf_authtype)),
1136 GET_BE_U_2(op->ospf_authtype));
1138 switch (GET_BE_U_2(op->ospf_authtype)) {
1140 case OSPF_AUTH_NONE:
1143 case OSPF_AUTH_SIMPLE:
1144 ND_PRINT("\n\tSimple text password: ");
1145 nd_printjnp(ndo, op->ospf_authdata, OSPF_AUTH_SIMPLE_LEN);
1149 ND_PRINT("\n\tKey-ID: %u, Auth-Length: %u, Crypto Sequence Number: 0x%08x",
1150 GET_U_1(op->ospf_authdata + 2),
1151 GET_U_1(op->ospf_authdata + 3),
1152 GET_BE_U_4((op->ospf_authdata) + 4));
1159 /* Do rest according to version. */
1160 switch (GET_U_1(op->ospf_version)) {
1163 /* ospf version 2 */
1164 if (ospf_decode_v2(ndo, op, dataend))
1166 if (length > GET_BE_U_2(op->ospf_len))
1167 ospf_decode_lls(ndo, op, length);
1171 ND_PRINT(" ospf [version %u]", GET_U_1(op->ospf_version));
1173 } /* end switch on version */
1177 nd_trunc_longjmp(ndo);