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)
25 static const char rcsid[] =
26 "@(#) $Header: /tcpdump/master/tcpdump/print-ospf.c,v 1.31 2001/06/28 04:34:51 fenner Exp $ (LBL)";
33 #include <sys/param.h>
35 #include <sys/socket.h>
37 #include <netinet/in.h>
42 #include "interface.h"
43 #include "addrtoname.h"
54 static const struct bits ospf_option_bits[] = {
55 { OSPF_OPTION_T, "T" },
56 { OSPF_OPTION_E, "E" },
57 { OSPF_OPTION_MC, "MC" },
61 static const struct bits ospf_rla_flag_bits[] = {
64 { RLA_FLAG_W1, "W1" },
65 { RLA_FLAG_W2, "W2" },
69 static struct tok type2str[] = {
70 { OSPF_TYPE_UMD, "umd" },
71 { OSPF_TYPE_HELLO, "hello" },
72 { OSPF_TYPE_DB, "dd" },
73 { OSPF_TYPE_LSR, "ls_req" },
74 { OSPF_TYPE_LSU, "ls_upd" },
75 { OSPF_TYPE_LSA, "ls_ack" },
79 static char tstr[] = " [|ospf]";
82 static inline void ospf_print_seqage(u_int32_t, time_t);
83 static inline void ospf_print_bits(const struct bits *, u_char);
84 static void ospf_print_ls_type(u_int, const struct in_addr *,
85 const struct in_addr *, const char *);
86 static int ospf_print_lshdr(const struct lsa_hdr *);
87 static int ospf_print_lsa(const struct lsa *);
88 static int ospf_decode_v2(const struct ospfhdr *, const u_char *);
91 ospf_print_seqage(register u_int32_t seq, register time_t us)
93 register time_t sec = us % 60;
94 register time_t mins = (us / 60) % 60;
95 register time_t hour = us / 3600;
97 printf(" S %X age ", seq);
99 printf("%u:%02u:%02u",
100 (u_int32_t) hour, (u_int32_t) mins, (u_int32_t) sec);
102 printf("%u:%02u", (u_int32_t) mins, (u_int32_t) sec);
104 printf("%u", (u_int32_t) sec);
109 ospf_print_bits(register const struct bits *bp, register u_char options)
111 register char sep = ' ';
114 if (options & bp->bit) {
115 printf("%c%s", sep, bp->str);
118 } while ((++bp)->bit);
122 ospf_print_ls_type(register u_int ls_type,
123 register const struct in_addr *ls_stateid,
124 register const struct in_addr *ls_router, register const char *fmt)
130 printf(" rtr %s ", ipaddr_string(ls_router));
133 case LS_TYPE_NETWORK:
134 printf(" net dr %s if %s",
135 ipaddr_string(ls_router),
136 ipaddr_string(ls_stateid));
140 printf(" sum %s abr %s",
141 ipaddr_string(ls_stateid),
142 ipaddr_string(ls_router));
145 case LS_TYPE_SUM_ABR:
146 printf(" abr %s rtr %s",
147 ipaddr_string(ls_router),
148 ipaddr_string(ls_stateid));
152 printf(" ase %s asbr %s",
153 ipaddr_string(ls_stateid),
154 ipaddr_string(ls_router));
158 printf(" group %s rtr %s",
159 ipaddr_string(ls_stateid),
160 ipaddr_string(ls_router));
165 printf(fmt, ls_type);
171 ospf_print_lshdr(register const struct lsa_hdr *lshp)
174 TCHECK(lshp->ls_type);
175 printf(" {"); /* } (ctags) */
177 TCHECK(lshp->ls_options);
178 ospf_print_bits(ospf_option_bits, lshp->ls_options);
179 TCHECK(lshp->ls_seq);
180 ospf_print_seqage(ntohl(lshp->ls_seq), ntohs(lshp->ls_age));
181 ospf_print_ls_type(lshp->ls_type, &lshp->ls_stateid, &lshp->ls_router,
191 * Print a single link state advertisement. If truncated return 1, else 0.
194 ospf_print_lsa(register const struct lsa *lsap)
196 register const u_char *ls_end;
197 register const struct rlalink *rlp;
198 register const struct tos_metric *tosp;
199 register const struct in_addr *ap;
200 register const struct aslametric *almp;
201 register const struct mcla *mcp;
202 register const u_int32_t *lp;
205 if (ospf_print_lshdr(&lsap->ls_hdr))
207 TCHECK(lsap->ls_hdr.ls_length);
208 ls_end = (u_char *)lsap + ntohs(lsap->ls_hdr.ls_length);
209 switch (lsap->ls_hdr.ls_type) {
212 TCHECK(lsap->lsa_un.un_rla.rla_flags);
213 ospf_print_bits(ospf_rla_flag_bits,
214 lsap->lsa_un.un_rla.rla_flags);
216 TCHECK(lsap->lsa_un.un_rla.rla_count);
217 j = ntohs(lsap->lsa_un.un_rla.rla_count);
218 TCHECK(lsap->lsa_un.un_rla.rla_link);
219 rlp = lsap->lsa_un.un_rla.rla_link;
222 printf(" {"); /* } (ctags) */
223 switch (rlp->link_type) {
225 case RLA_TYPE_VIRTUAL:
229 case RLA_TYPE_ROUTER:
230 printf(" nbrid %s if %s",
231 ipaddr_string(&rlp->link_id),
232 ipaddr_string(&rlp->link_data));
235 case RLA_TYPE_TRANSIT:
236 printf(" dr %s if %s",
237 ipaddr_string(&rlp->link_id),
238 ipaddr_string(&rlp->link_data));
242 printf(" net %s mask %s",
243 ipaddr_string(&rlp->link_id),
244 ipaddr_string(&rlp->link_data));
249 printf(" ??RouterLinksType %d?? }",
253 printf(" tos 0 metric %d", ntohs(rlp->link_tos0metric));
254 tosp = (struct tos_metric *)
255 ((sizeof rlp->link_tos0metric) + (u_char *) rlp);
256 for (k = 0; k < (int) rlp->link_toscount; ++k, ++tosp) {
258 printf(" tos %d metric %d",
260 ntohs(tosp->tos_metric));
264 rlp = (struct rlalink *)((u_char *)(rlp + 1) +
265 ((rlp->link_toscount) * sizeof(*tosp)));
269 case LS_TYPE_NETWORK:
270 TCHECK(lsap->lsa_un.un_nla.nla_mask);
271 printf(" mask %s rtrs",
272 ipaddr_string(&lsap->lsa_un.un_nla.nla_mask));
273 ap = lsap->lsa_un.un_nla.nla_router;
274 while ((u_char *)ap < ls_end) {
276 printf(" %s", ipaddr_string(ap));
282 TCHECK(lsap->lsa_un.un_nla.nla_mask);
284 ipaddr_string(&lsap->lsa_un.un_sla.sla_mask));
287 case LS_TYPE_SUM_ABR:
288 TCHECK(lsap->lsa_un.un_sla.sla_tosmetric);
289 lp = lsap->lsa_un.un_sla.sla_tosmetric;
290 while ((u_char *)lp < ls_end) {
291 register u_int32_t ul;
295 printf(" tos %d metric %d",
296 (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS,
297 ul & SLA_MASK_METRIC);
303 TCHECK(lsap->lsa_un.un_nla.nla_mask);
305 ipaddr_string(&lsap->lsa_un.un_asla.asla_mask));
307 TCHECK(lsap->lsa_un.un_sla.sla_tosmetric);
308 almp = lsap->lsa_un.un_asla.asla_metric;
309 while ((u_char *)almp < ls_end) {
310 register u_int32_t ul;
312 TCHECK(almp->asla_tosmetric);
313 ul = ntohl(almp->asla_tosmetric);
314 printf(" type %d tos %d metric %d",
315 (ul & ASLA_FLAG_EXTERNAL) ? 2 : 1,
316 (ul & ASLA_MASK_TOS) >> ASLA_SHIFT_TOS,
317 (ul & ASLA_MASK_METRIC));
318 TCHECK(almp->asla_forward);
319 if (almp->asla_forward.s_addr) {
320 printf(" forward %s",
321 ipaddr_string(&almp->asla_forward));
323 TCHECK(almp->asla_tag);
324 if (almp->asla_tag.s_addr) {
326 ipaddr_string(&almp->asla_tag));
333 /* Multicast extensions as of 23 July 1991 */
334 mcp = lsap->lsa_un.un_mcla;
335 while ((u_char *)mcp < ls_end) {
336 TCHECK(mcp->mcla_vid);
337 switch (ntohl(mcp->mcla_vtype)) {
339 case MCLA_VERTEX_ROUTER:
340 printf(" rtr rtrid %s",
341 ipaddr_string(&mcp->mcla_vid));
344 case MCLA_VERTEX_NETWORK:
346 ipaddr_string(&mcp->mcla_vid));
350 printf(" ??VertexType %u??",
351 (u_int32_t)ntohl(mcp->mcla_vtype));
367 ospf_decode_v2(register const struct ospfhdr *op,
368 register const u_char *dataend)
370 register const struct in_addr *ap;
371 register const struct lsr *lsrp;
372 register const struct lsa_hdr *lshp;
373 register const struct lsa *lsap;
377 switch (op->ospf_type) {
381 * Rob Coltun's special monitoring packets;
386 case OSPF_TYPE_HELLO:
388 TCHECK(op->ospf_hello.hello_deadint);
389 ospf_print_bits(ospf_option_bits,
390 op->ospf_hello.hello_options);
391 printf(" mask %s int %d pri %d dead %u",
392 ipaddr_string(&op->ospf_hello.hello_mask),
393 ntohs(op->ospf_hello.hello_helloint),
394 op->ospf_hello.hello_priority,
395 (u_int32_t)ntohl(op->ospf_hello.hello_deadint));
397 TCHECK(op->ospf_hello.hello_dr);
398 if (op->ospf_hello.hello_dr.s_addr != 0)
400 ipaddr_string(&op->ospf_hello.hello_dr));
401 TCHECK(op->ospf_hello.hello_bdr);
402 if (op->ospf_hello.hello_bdr.s_addr != 0)
404 ipaddr_string(&op->ospf_hello.hello_bdr));
406 ap = op->ospf_hello.hello_neighbor;
407 if ((u_char *)ap < dataend)
409 while ((u_char *)ap < dataend) {
411 printf(" %s", ipaddr_string(ap));
418 TCHECK(op->ospf_db.db_options);
419 ospf_print_bits(ospf_option_bits, op->ospf_db.db_options);
421 TCHECK(op->ospf_db.db_flags);
422 if (op->ospf_db.db_flags & OSPF_DB_INIT) {
426 if (op->ospf_db.db_flags & OSPF_DB_MORE) {
430 if (op->ospf_db.db_flags & OSPF_DB_MASTER) {
434 TCHECK(op->ospf_db.db_seq);
435 printf(" S %X", (u_int32_t)ntohl(op->ospf_db.db_seq));
438 /* Print all the LS adv's */
439 lshp = op->ospf_db.db_lshdr;
441 while (!ospf_print_lshdr(lshp)) {
452 while ((u_char *)lsrp < dataend) {
454 printf(" {"); /* } (ctags) */
455 ospf_print_ls_type(ntohl(lsrp->ls_type),
468 lsap = op->ospf_lsu.lsu_lsa;
469 TCHECK(op->ospf_lsu.lsu_count);
470 i = ntohl(op->ospf_lsu.lsu_count);
472 if (ospf_print_lsa(lsap))
474 lsap = (struct lsa *)((u_char *)lsap +
475 ntohs(lsap->ls_hdr.ls_length));
483 lshp = op->ospf_lsa.lsa_lshdr;
485 while (!ospf_print_lshdr(lshp)) {
494 printf("v2 type %d", op->ospf_type);
503 ospf_print(register const u_char *bp, register u_int length,
504 register const u_char *bp2)
506 register const struct ospfhdr *op;
507 register const struct ip *ip;
508 register const u_char *dataend;
509 register const char *cp;
511 op = (struct ospfhdr *)bp;
512 ip = (struct ip *)bp2;
514 /* XXX Before we do anything else, strip off the MD5 trailer */
515 TCHECK(op->ospf_authtype);
516 if (ntohs(op->ospf_authtype) == OSPF_AUTH_MD5) {
517 length -= OSPF_AUTH_MD5_LEN;
518 snapend -= OSPF_AUTH_MD5_LEN;
521 /* If the type is valid translate it, or just print the type */
522 /* value. If it's not valid, say so and return */
523 TCHECK(op->ospf_type);
524 cp = tok2str(type2str, "type%d", op->ospf_type);
525 printf("OSPFv%d-%s %d:", op->ospf_version, cp, length);
529 TCHECK(op->ospf_len);
530 if (length != ntohs(op->ospf_len)) {
531 printf(" [len %d]", ntohs(op->ospf_len));
534 dataend = bp + length;
536 /* Print the routerid if it is not the same as the source */
537 TCHECK(op->ospf_routerid);
538 if (ip->ip_src.s_addr != op->ospf_routerid.s_addr)
539 printf(" rtrid %s", ipaddr_string(&op->ospf_routerid));
541 TCHECK(op->ospf_areaid);
542 if (op->ospf_areaid.s_addr != 0)
543 printf(" area %s", ipaddr_string(&op->ospf_areaid));
548 /* Print authentication data (should we really do this?) */
549 TCHECK2(op->ospf_authdata[0], sizeof(op->ospf_authdata));
550 switch (ntohs(op->ospf_authtype)) {
555 case OSPF_AUTH_SIMPLE:
557 (void)fn_printn(op->ospf_authdata,
558 sizeof(op->ospf_authdata), NULL);
567 printf(" ??authtype-%d??", ntohs(op->ospf_authtype));
571 /* Do rest according to version. */
572 switch (op->ospf_version) {
576 if (ospf_decode_v2(op, dataend))
581 printf(" ospf [version %d]", op->ospf_version);
583 } /* end switch on version */