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_W1, "Virtual" },
63 { RLA_FLAG_W2, "W2" },
67 static const struct tok type2str[] = {
68 { OSPF_TYPE_HELLO, "Hello" },
69 { OSPF_TYPE_DD, "Database Description" },
70 { OSPF_TYPE_LS_REQ, "LS-Request" },
71 { OSPF_TYPE_LS_UPDATE, "LS-Update" },
72 { OSPF_TYPE_LS_ACK, "LS-Ack" },
76 static const struct tok lsa_values[] = {
77 { LS_TYPE_ROUTER, "Router" },
78 { LS_TYPE_NETWORK, "Network" },
79 { LS_TYPE_SUM_IP, "Summary" },
80 { LS_TYPE_SUM_ABR, "ASBR Summary" },
81 { LS_TYPE_ASE, "External" },
82 { LS_TYPE_GROUP, "Multicast Group" },
83 { LS_TYPE_NSSA, "NSSA" },
84 { LS_TYPE_OPAQUE_LL, "Link Local Opaque" },
85 { LS_TYPE_OPAQUE_AL, "Area Local Opaque" },
86 { LS_TYPE_OPAQUE_DW, "Domain Wide Opaque" },
90 static const struct tok ospf_dd_flag_values[] = {
91 { OSPF_DB_INIT, "Init" },
92 { OSPF_DB_MORE, "More" },
93 { OSPF_DB_MASTER, "Master" },
94 { OSPF_DB_RESYNC, "OOBResync" },
98 static const struct tok lsa_opaque_values[] = {
99 { LS_OPAQUE_TYPE_TE, "Traffic Engineering" },
100 { LS_OPAQUE_TYPE_GRACE, "Graceful restart" },
101 { LS_OPAQUE_TYPE_RI, "Router Information" },
105 static const struct tok lsa_opaque_te_tlv_values[] = {
106 { LS_OPAQUE_TE_TLV_ROUTER, "Router Address" },
107 { LS_OPAQUE_TE_TLV_LINK, "Link" },
111 static const struct tok lsa_opaque_te_link_tlv_subtlv_values[] = {
112 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE, "Link Type" },
113 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID, "Link ID" },
114 { LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP, "Local Interface IP address" },
115 { LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP, "Remote Interface IP address" },
116 { LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC, "Traffic Engineering Metric" },
117 { LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW, "Maximum Bandwidth" },
118 { LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW, "Maximum Reservable Bandwidth" },
119 { LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW, "Unreserved Bandwidth" },
120 { LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP, "Administrative Group" },
121 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" },
122 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE, "Link Protection Type" },
123 { LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR, "Interface Switching Capability" },
124 { LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP, "Shared Risk Link Group" },
125 { LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS, "Bandwidth Constraints" },
129 static const struct tok lsa_opaque_grace_tlv_values[] = {
130 { LS_OPAQUE_GRACE_TLV_PERIOD, "Grace Period" },
131 { LS_OPAQUE_GRACE_TLV_REASON, "Graceful restart Reason" },
132 { LS_OPAQUE_GRACE_TLV_INT_ADDRESS, "IPv4 interface address" },
136 static const struct tok lsa_opaque_grace_tlv_reason_values[] = {
137 { LS_OPAQUE_GRACE_TLV_REASON_UNKNOWN, "Unknown" },
138 { LS_OPAQUE_GRACE_TLV_REASON_SW_RESTART, "Software Restart" },
139 { LS_OPAQUE_GRACE_TLV_REASON_SW_UPGRADE, "Software Reload/Upgrade" },
140 { LS_OPAQUE_GRACE_TLV_REASON_CP_SWITCH, "Control Processor Switch" },
144 static const struct tok lsa_opaque_te_tlv_link_type_sub_tlv_values[] = {
145 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_PTP, "Point-to-point" },
146 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_MA, "Multi-Access" },
150 static const struct tok lsa_opaque_ri_tlv_values[] = {
151 { LS_OPAQUE_RI_TLV_CAP, "Router Capabilities" },
155 static const struct tok lsa_opaque_ri_tlv_cap_values[] = {
160 { 16, "graceful restart capable" },
161 { 32, "graceful restart helper" },
162 { 64, "Stub router support" },
163 { 128, "Traffic engineering" },
164 { 256, "p2p over LAN" },
165 { 512, "path computation server" },
169 static const struct tok ospf_lls_tlv_values[] = {
170 { OSPF_LLS_EO, "Extended Options" },
171 { OSPF_LLS_MD5, "MD5 Authentication" },
175 static const struct tok ospf_lls_eo_options[] = {
176 { OSPF_LLS_EO_LR, "LSDB resync" },
177 { OSPF_LLS_EO_RS, "Restart" },
182 ospf_grace_lsa_print(netdissect_options *ndo,
183 const u_char *tptr, u_int ls_length)
185 u_int tlv_type, tlv_length;
188 while (ls_length > 0) {
191 ND_PRINT("\n\t Remaining LS length %u < 4", ls_length);
194 tlv_type = GET_BE_U_2(tptr);
195 tlv_length = GET_BE_U_2(tptr + 2);
199 ND_PRINT("\n\t %s TLV (%u), length %u, value: ",
200 tok2str(lsa_opaque_grace_tlv_values,"unknown",tlv_type),
204 if (tlv_length > ls_length) {
205 ND_PRINT("\n\t Bogus length %u > %u", tlv_length,
210 /* Infinite loop protection. */
211 if (tlv_type == 0 || tlv_length ==0) {
215 ND_TCHECK_LEN(tptr, tlv_length);
218 case LS_OPAQUE_GRACE_TLV_PERIOD:
219 if (tlv_length != 4) {
220 ND_PRINT("\n\t Bogus length %u != 4", tlv_length);
223 ND_PRINT("%us", GET_BE_U_4(tptr));
226 case LS_OPAQUE_GRACE_TLV_REASON:
227 if (tlv_length != 1) {
228 ND_PRINT("\n\t Bogus length %u != 1", tlv_length);
232 tok2str(lsa_opaque_grace_tlv_reason_values, "Unknown", GET_U_1(tptr)),
236 case LS_OPAQUE_GRACE_TLV_INT_ADDRESS:
237 if (tlv_length != 4) {
238 ND_PRINT("\n\t Bogus length %u != 4", tlv_length);
241 ND_PRINT("%s", GET_IPADDR_STRING(tptr));
245 if (ndo->ndo_vflag <= 1) {
246 if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_length))
252 /* in OSPF everything has to be 32-bit aligned, including TLVs */
253 if (tlv_length%4 != 0)
254 tlv_length+=4-(tlv_length%4);
255 ls_length-=tlv_length;
265 ospf_te_lsa_print(netdissect_options *ndo,
266 const u_char *tptr, u_int ls_length)
268 u_int tlv_type, tlv_length, subtlv_type, subtlv_length;
269 u_int priority_level, te_class, count_srlg;
270 union { /* int to float conversion buffer for several subTLVs */
275 while (ls_length != 0) {
278 ND_PRINT("\n\t Remaining LS length %u < 4", ls_length);
281 tlv_type = GET_BE_U_2(tptr);
282 tlv_length = GET_BE_U_2(tptr + 2);
286 ND_PRINT("\n\t %s TLV (%u), length: %u",
287 tok2str(lsa_opaque_te_tlv_values,"unknown",tlv_type),
291 if (tlv_length > ls_length) {
292 ND_PRINT("\n\t Bogus length %u > %u", tlv_length,
297 /* Infinite loop protection. */
298 if (tlv_type == 0 || tlv_length ==0) {
303 case LS_OPAQUE_TE_TLV_LINK:
304 while (tlv_length != 0) {
305 if (tlv_length < 4) {
306 ND_PRINT("\n\t Remaining TLV length %u < 4",
310 subtlv_type = GET_BE_U_2(tptr);
311 subtlv_length = GET_BE_U_2(tptr + 2);
315 /* Infinite loop protection */
316 if (subtlv_type == 0 || subtlv_length == 0)
319 ND_PRINT("\n\t %s subTLV (%u), length: %u",
320 tok2str(lsa_opaque_te_link_tlv_subtlv_values,"unknown",subtlv_type),
324 if (tlv_length < subtlv_length) {
325 ND_PRINT("\n\t Remaining TLV length %u < %u",
326 tlv_length + 4, subtlv_length + 4);
329 ND_TCHECK_LEN(tptr, subtlv_length);
330 switch(subtlv_type) {
331 case LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP:
332 if (subtlv_length != 4) {
336 ND_PRINT(", 0x%08x", GET_BE_U_4(tptr));
338 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID:
339 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID:
340 if (subtlv_length != 4 && subtlv_length != 8) {
341 ND_PRINT(" != 4 && != 8");
344 ND_PRINT(", %s (0x%08x)",
345 GET_IPADDR_STRING(tptr),
347 if (subtlv_length == 8) /* rfc4203 */
348 ND_PRINT(", %s (0x%08x)",
349 GET_IPADDR_STRING(tptr+4),
350 GET_BE_U_4(tptr + 4));
352 case LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP:
353 case LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP:
354 if (subtlv_length != 4) {
358 ND_PRINT(", %s", GET_IPADDR_STRING(tptr));
360 case LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW:
361 case LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW:
362 if (subtlv_length != 4) {
366 bw.i = GET_BE_U_4(tptr);
367 ND_PRINT(", %.3f Mbps", bw.f * 8 / 1000000);
369 case LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW:
370 if (subtlv_length != 32) {
374 for (te_class = 0; te_class < 8; te_class++) {
375 bw.i = GET_BE_U_4(tptr + te_class * 4);
376 ND_PRINT("\n\t\tTE-Class %u: %.3f Mbps",
381 case LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS:
382 if (subtlv_length < 4) {
386 /* BC Model Id (1 octet) + Reserved (3 octets) */
387 ND_PRINT("\n\t\tBandwidth Constraints Model ID: %s (%u)",
388 tok2str(diffserv_te_bc_values, "unknown", GET_U_1(tptr)),
390 if (subtlv_length % 4 != 0) {
391 ND_PRINT("\n\t\tlength %u != N x 4", subtlv_length);
394 if (subtlv_length > 36) {
395 ND_PRINT("\n\t\tlength %u > 36", subtlv_length);
398 /* decode BCs until the subTLV ends */
399 for (te_class = 0; te_class < (subtlv_length-4)/4; te_class++) {
400 bw.i = GET_BE_U_4(tptr + 4 + te_class * 4);
401 ND_PRINT("\n\t\t Bandwidth constraint CT%u: %.3f Mbps",
406 case LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC:
407 if (subtlv_length != 4) {
411 ND_PRINT(", Metric %u", GET_BE_U_4(tptr));
413 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE:
414 /* Protection Cap (1 octet) + Reserved ((3 octets) */
415 if (subtlv_length != 4) {
420 bittok2str(gmpls_link_prot_values, "none", GET_U_1(tptr)));
422 case LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR:
423 if (subtlv_length < 36) {
427 /* Switching Cap (1 octet) + Encoding (1) + Reserved (2) */
428 ND_PRINT("\n\t\tInterface Switching Capability: %s",
429 tok2str(gmpls_switch_cap_values, "Unknown", GET_U_1((tptr))));
430 ND_PRINT("\n\t\tLSP Encoding: %s\n\t\tMax LSP Bandwidth:",
431 tok2str(gmpls_encoding_values, "Unknown", GET_U_1((tptr + 1))));
432 for (priority_level = 0; priority_level < 8; priority_level++) {
433 bw.i = GET_BE_U_4(tptr + 4 + (priority_level * 4));
434 ND_PRINT("\n\t\t priority level %u: %.3f Mbps",
439 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE:
440 if (subtlv_length != 1) {
444 ND_PRINT(", %s (%u)",
445 tok2str(lsa_opaque_te_tlv_link_type_sub_tlv_values,"unknown",GET_U_1(tptr)),
449 case LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP:
450 if (subtlv_length % 4 != 0) {
451 ND_PRINT(" != N x 4");
454 count_srlg = subtlv_length / 4;
456 ND_PRINT("\n\t\t Shared risk group: ");
457 while (count_srlg > 0) {
458 bw.i = GET_BE_U_4(tptr);
459 ND_PRINT("%u", bw.i);
468 if (ndo->ndo_vflag <= 1) {
469 if (!print_unknown_data(ndo, tptr, "\n\t\t", subtlv_length))
474 /* in OSPF everything has to be 32-bit aligned, including subTLVs */
475 if (subtlv_length%4 != 0)
476 subtlv_length+=4-(subtlv_length%4);
478 if (tlv_length < subtlv_length) {
479 ND_PRINT("\n\t Remaining TLV length %u < %u",
480 tlv_length + 4, subtlv_length + 4);
483 tlv_length-=subtlv_length;
489 case LS_OPAQUE_TE_TLV_ROUTER:
490 if (tlv_length < 4) {
491 ND_PRINT("\n\t TLV length %u < 4", tlv_length);
494 ND_PRINT(", %s", GET_IPADDR_STRING(tptr));
498 if (ndo->ndo_vflag <= 1) {
499 if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_length))
504 /* in OSPF everything has to be 32-bit aligned, including TLVs */
505 if (tlv_length%4 != 0)
506 tlv_length+=4-(tlv_length%4);
507 if (tlv_length > ls_length) {
508 ND_PRINT("\n\t Bogus padded length %u > %u", tlv_length,
512 ls_length-=tlv_length;
519 nd_print_invalid(ndo);
524 ospf_print_lshdr(netdissect_options *ndo,
525 const struct lsa_hdr *lshp)
530 ls_length = GET_BE_U_2(lshp->ls_length);
531 if (ls_length < sizeof(struct lsa_hdr)) {
532 ND_PRINT("\n\t Bogus length %u < header (%zu)", ls_length,
533 sizeof(struct lsa_hdr));
536 ND_PRINT("\n\t Advertising Router %s, seq 0x%08x, age %us, length %zu",
537 GET_IPADDR_STRING(lshp->ls_router),
538 GET_BE_U_4(lshp->ls_seq),
539 GET_BE_U_2(lshp->ls_age),
540 ls_length - sizeof(struct lsa_hdr));
541 ls_type = GET_U_1(lshp->ls_type);
543 /* the LSA header for opaque LSAs was slightly changed */
544 case LS_TYPE_OPAQUE_LL:
545 case LS_TYPE_OPAQUE_AL:
546 case LS_TYPE_OPAQUE_DW:
547 ND_PRINT("\n\t %s LSA (%u), Opaque-Type %s LSA (%u), Opaque-ID %u",
548 tok2str(lsa_values,"unknown",ls_type),
551 tok2str(lsa_opaque_values,
553 GET_U_1(lshp->un_lsa_id.opaque_field.opaque_type)),
554 GET_U_1(lshp->un_lsa_id.opaque_field.opaque_type),
555 GET_BE_U_3(lshp->un_lsa_id.opaque_field.opaque_id)
560 /* all other LSA types use regular style LSA headers */
562 ND_PRINT("\n\t %s LSA (%u), LSA-ID: %s",
563 tok2str(lsa_values,"unknown",ls_type),
565 GET_IPADDR_STRING(lshp->un_lsa_id.lsa_id));
568 ND_PRINT("\n\t Options: [%s]",
569 bittok2str(ospf_option_values, "none", GET_U_1(lshp->ls_options)));
574 /* draft-ietf-ospf-mt-09 */
575 static const struct tok ospf_topology_values[] = {
583 * Print all the per-topology metrics.
586 ospf_print_tos_metrics(netdissect_options *ndo,
587 const union un_tos *tos)
593 toscount = GET_U_1(tos->link.link_tos_count)+1;
597 * All but the first metric contain a valid topology id.
599 while (toscount != 0) {
600 tos_type = GET_U_1(tos->metrics.tos_type);
601 ND_PRINT("\n\t\ttopology %s (%u), metric %u",
602 tok2str(ospf_topology_values, "Unknown",
603 metric_count ? tos_type : 0),
604 metric_count ? tos_type : 0,
605 GET_BE_U_2(tos->metrics.tos_metric));
613 * Print a single link state advertisement. If truncated or if LSA length
614 * field is less than the length of the LSA header, return NULl, else
615 * return pointer to data past end of LSA.
617 static const uint8_t *
618 ospf_print_lsa(netdissect_options *ndo,
619 const struct lsa *lsap)
621 const uint8_t *ls_end;
622 const struct rlalink *rlp;
624 const struct aslametric *almp;
625 const struct mcla *mcp;
627 u_int tlv_type, tlv_length, rla_count, topology;
628 int ospf_print_lshdr_ret;
632 tptr = (const uint8_t *)lsap->lsa_un.un_unknown; /* squelch compiler warnings */
633 ospf_print_lshdr_ret = ospf_print_lshdr(ndo, &lsap->ls_hdr);
634 if (ospf_print_lshdr_ret < 0)
636 ls_length = (u_int)ospf_print_lshdr_ret;
637 ls_end = (const uint8_t *)lsap + ls_length;
639 * ospf_print_lshdr() returns -1 if the length is too short,
640 * so we know ls_length is >= sizeof(struct lsa_hdr).
642 ls_length -= sizeof(struct lsa_hdr);
644 switch (GET_U_1(lsap->ls_hdr.ls_type)) {
647 ND_PRINT("\n\t Router LSA Options: [%s]",
648 bittok2str(ospf_rla_flag_values, "none", GET_U_1(lsap->lsa_un.un_rla.rla_flags)));
650 rla_count = GET_BE_U_2(lsap->lsa_un.un_rla.rla_count);
651 ND_TCHECK_SIZE(lsap->lsa_un.un_rla.rla_link);
652 rlp = lsap->lsa_un.un_rla.rla_link;
653 for (u_int i = rla_count; i != 0; i--) {
655 switch (GET_U_1(rlp->un_tos.link.link_type)) {
657 case RLA_TYPE_VIRTUAL:
658 ND_PRINT("\n\t Virtual Link: Neighbor Router-ID: %s, Interface Address: %s",
659 GET_IPADDR_STRING(rlp->link_id),
660 GET_IPADDR_STRING(rlp->link_data));
663 case RLA_TYPE_ROUTER:
664 ND_PRINT("\n\t Neighbor Router-ID: %s, Interface Address: %s",
665 GET_IPADDR_STRING(rlp->link_id),
666 GET_IPADDR_STRING(rlp->link_data));
669 case RLA_TYPE_TRANSIT:
670 ND_PRINT("\n\t Neighbor Network-ID: %s, Interface Address: %s",
671 GET_IPADDR_STRING(rlp->link_id),
672 GET_IPADDR_STRING(rlp->link_data));
676 ND_PRINT("\n\t Stub Network: %s, Mask: %s",
677 GET_IPADDR_STRING(rlp->link_id),
678 GET_IPADDR_STRING(rlp->link_data));
682 ND_PRINT("\n\t Unknown Router Link Type (%u)",
683 GET_U_1(rlp->un_tos.link.link_type));
687 ospf_print_tos_metrics(ndo, &rlp->un_tos);
689 rlp = (const struct rlalink *)((const u_char *)(rlp + 1) +
690 (GET_U_1(rlp->un_tos.link.link_tos_count) * sizeof(union un_tos)));
694 case LS_TYPE_NETWORK:
695 ND_PRINT("\n\t Mask %s\n\t Connected Routers:",
696 GET_IPADDR_STRING(lsap->lsa_un.un_nla.nla_mask));
697 ap = lsap->lsa_un.un_nla.nla_router;
698 while ((const u_char *)ap < ls_end) {
700 ND_PRINT("\n\t %s", GET_IPADDR_STRING(*ap));
706 ND_TCHECK_4(lsap->lsa_un.un_nla.nla_mask);
707 ND_PRINT("\n\t Mask %s",
708 GET_IPADDR_STRING(lsap->lsa_un.un_sla.sla_mask));
709 ND_TCHECK_SIZE(lsap->lsa_un.un_sla.sla_tosmetric);
710 lp = (const uint8_t *)lsap->lsa_un.un_sla.sla_tosmetric;
711 while (lp < ls_end) {
715 topology = (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS;
716 ND_PRINT("\n\t\ttopology %s (%u) metric %u",
717 tok2str(ospf_topology_values, "Unknown", topology),
719 ul & SLA_MASK_METRIC);
724 case LS_TYPE_SUM_ABR:
725 ND_TCHECK_SIZE(lsap->lsa_un.un_sla.sla_tosmetric);
726 lp = (const uint8_t *)lsap->lsa_un.un_sla.sla_tosmetric;
727 while (lp < ls_end) {
731 topology = (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS;
732 ND_PRINT("\n\t\ttopology %s (%u) metric %u",
733 tok2str(ospf_topology_values, "Unknown", topology),
735 ul & SLA_MASK_METRIC);
741 case LS_TYPE_NSSA: /* fall through - those LSAs share the same format */
742 ND_TCHECK_4(lsap->lsa_un.un_nla.nla_mask);
743 ND_PRINT("\n\t Mask %s",
744 GET_IPADDR_STRING(lsap->lsa_un.un_asla.asla_mask));
746 ND_TCHECK_SIZE(lsap->lsa_un.un_sla.sla_tosmetric);
747 almp = lsap->lsa_un.un_asla.asla_metric;
748 while ((const u_char *)almp < ls_end) {
751 ul = GET_BE_U_4(almp->asla_tosmetric);
752 topology = ((ul & ASLA_MASK_TOS) >> ASLA_SHIFT_TOS);
753 ND_PRINT("\n\t\ttopology %s (%u), type %u, metric",
754 tok2str(ospf_topology_values, "Unknown", topology),
756 (ul & ASLA_FLAG_EXTERNAL) ? 2 : 1);
757 if ((ul & ASLA_MASK_METRIC) == 0xffffff)
758 ND_PRINT(" infinite");
760 ND_PRINT(" %u", (ul & ASLA_MASK_METRIC));
762 if (GET_IPV4_TO_NETWORK_ORDER(almp->asla_forward) != 0) {
763 ND_PRINT(", forward %s", GET_IPADDR_STRING(almp->asla_forward));
765 if (GET_IPV4_TO_NETWORK_ORDER(almp->asla_tag) != 0) {
766 ND_PRINT(", tag %s", GET_IPADDR_STRING(almp->asla_tag));
773 /* Multicast extensions as of 23 July 1991 */
774 mcp = lsap->lsa_un.un_mcla;
775 while ((const u_char *)mcp < ls_end) {
776 switch (GET_BE_U_4(mcp->mcla_vtype)) {
778 case MCLA_VERTEX_ROUTER:
779 ND_PRINT("\n\t Router Router-ID %s",
780 GET_IPADDR_STRING(mcp->mcla_vid));
783 case MCLA_VERTEX_NETWORK:
784 ND_PRINT("\n\t Network Designated Router %s",
785 GET_IPADDR_STRING(mcp->mcla_vid));
789 ND_PRINT("\n\t unknown VertexType (%u)",
790 GET_BE_U_4(mcp->mcla_vtype));
797 case LS_TYPE_OPAQUE_LL: /* fall through */
798 case LS_TYPE_OPAQUE_AL:
799 case LS_TYPE_OPAQUE_DW:
801 switch (GET_U_1(lsap->ls_hdr.un_lsa_id.opaque_field.opaque_type)) {
802 case LS_OPAQUE_TYPE_RI:
803 tptr = (const uint8_t *)(lsap->lsa_un.un_ri_tlv);
805 u_int ls_length_remaining = ls_length;
806 while (ls_length_remaining != 0) {
808 if (ls_length_remaining < 4) {
809 ND_PRINT("\n\t Remaining LS length %u < 4", ls_length_remaining);
812 tlv_type = GET_BE_U_2(tptr);
813 tlv_length = GET_BE_U_2(tptr + 2);
815 ls_length_remaining-=4;
817 ND_PRINT("\n\t %s TLV (%u), length: %u, value: ",
818 tok2str(lsa_opaque_ri_tlv_values,"unknown",tlv_type),
822 if (tlv_length > ls_length_remaining) {
823 ND_PRINT("\n\t Bogus length %u > remaining LS length %u", tlv_length,
824 ls_length_remaining);
827 ND_TCHECK_LEN(tptr, tlv_length);
830 case LS_OPAQUE_RI_TLV_CAP:
831 if (tlv_length != 4) {
832 ND_PRINT("\n\t Bogus length %u != 4", tlv_length);
835 ND_PRINT("Capabilities: %s",
836 bittok2str(lsa_opaque_ri_tlv_cap_values, "Unknown", GET_BE_U_4(tptr)));
839 if (ndo->ndo_vflag <= 1) {
840 if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_length))
847 ls_length_remaining-=tlv_length;
851 case LS_OPAQUE_TYPE_GRACE:
852 if (ospf_grace_lsa_print(ndo, (const u_char *)(lsap->lsa_un.un_grace_tlv),
858 case LS_OPAQUE_TYPE_TE:
859 if (ospf_te_lsa_print(ndo, (const u_char *)(lsap->lsa_un.un_te_lsa_tlv),
866 if (ndo->ndo_vflag <= 1) {
867 if (!print_unknown_data(ndo, (const uint8_t *)lsap->lsa_un.un_unknown,
875 /* do we want to see an additionally hexdump ? */
876 if (ndo->ndo_vflag> 1)
877 if (!print_unknown_data(ndo, (const uint8_t *)lsap->lsa_un.un_unknown,
878 "\n\t ", ls_length)) {
888 ospf_decode_lls(netdissect_options *ndo,
889 const struct ospfhdr *op, u_int length)
892 const u_char *dataend;
894 uint16_t lls_type, lls_len;
897 switch (GET_U_1(op->ospf_type)) {
899 case OSPF_TYPE_HELLO:
900 if (!(GET_U_1(op->ospf_hello.hello_options) & OSPF_OPTION_L))
905 if (!(GET_U_1(op->ospf_db.db_options) & OSPF_OPTION_L))
913 /* dig deeper if LLS data is available; see RFC4813 */
914 length2 = GET_BE_U_2(op->ospf_len);
915 dptr = (const u_char *)op + length2;
916 dataend = (const u_char *)op + length;
918 if (GET_BE_U_2(op->ospf_authtype) == OSPF_AUTH_MD5) {
919 dptr = dptr + GET_U_1(op->ospf_authdata + 3);
920 length2 += GET_U_1(op->ospf_authdata + 3);
922 if (length2 >= length) {
923 ND_PRINT("\n\t[LLS truncated]");
926 ND_PRINT("\n\t LLS: checksum: 0x%04x", (u_int) GET_BE_U_2(dptr));
929 length2 = GET_BE_U_2(dptr);
930 ND_PRINT(", length: %u", length2);
933 while (dptr < dataend) {
934 lls_type = GET_BE_U_2(dptr);
935 ND_PRINT("\n\t %s (%u)",
936 tok2str(ospf_lls_tlv_values,"Unknown TLV",lls_type),
939 lls_len = GET_BE_U_2(dptr);
940 ND_PRINT(", length: %u", lls_len);
946 ND_PRINT(" [should be 4]");
949 lls_flags = GET_BE_U_4(dptr);
950 ND_PRINT("\n\t Options: 0x%08x [%s]", lls_flags,
951 bittok2str(ospf_lls_eo_options, "?", lls_flags));
957 ND_PRINT(" [should be 20]");
960 ND_PRINT("\n\t Sequence number: 0x%08x", GET_BE_U_4(dptr));
969 ospf_decode_v2(netdissect_options *ndo,
970 const struct ospfhdr *op, const u_char *dataend)
973 const struct lsr *lsrp;
974 const struct lsa_hdr *lshp;
975 const struct lsa *lsap;
976 uint32_t lsa_count,lsa_count_max;
978 switch (GET_U_1(op->ospf_type)) {
980 case OSPF_TYPE_HELLO:
981 ND_PRINT("\n\tOptions [%s]",
982 bittok2str(ospf_option_values,"none",GET_U_1(op->ospf_hello.hello_options)));
984 ND_PRINT("\n\t Hello Timer %us, Dead Timer %us, Mask %s, Priority %u",
985 GET_BE_U_2(op->ospf_hello.hello_helloint),
986 GET_BE_U_4(op->ospf_hello.hello_deadint),
987 GET_IPADDR_STRING(op->ospf_hello.hello_mask),
988 GET_U_1(op->ospf_hello.hello_priority));
990 if (GET_IPV4_TO_NETWORK_ORDER(op->ospf_hello.hello_dr) != 0)
991 ND_PRINT("\n\t Designated Router %s",
992 GET_IPADDR_STRING(op->ospf_hello.hello_dr));
994 if (GET_IPV4_TO_NETWORK_ORDER(op->ospf_hello.hello_bdr) != 0)
995 ND_PRINT(", Backup Designated Router %s",
996 GET_IPADDR_STRING(op->ospf_hello.hello_bdr));
998 ap = op->ospf_hello.hello_neighbor;
999 if ((const u_char *)ap < dataend)
1000 ND_PRINT("\n\t Neighbor List:");
1001 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);