print-ospf6.c revision 1.2.6.1
1 /* 2 * Copyright (c) 1992, 1993, 1994, 1995, 1996, 1997 3 * The Regents of the University of California. All rights reserved. 4 * 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 16 * written permission. 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. 20 * 21 * OSPF support contributed by Jeffrey Honig (jch (at) mitchell.cit.cornell.edu) 22 */ 23 24 #include <sys/cdefs.h> 25 #ifndef lint 26 #if 0 27 static const char rcsid[] _U_ = 28 "@(#) Header: /tcpdump/master/tcpdump/print-ospf6.c,v 1.15 2006-09-13 06:31:11 guy Exp (LBL)"; 29 #else 30 __RCSID("$NetBSD: print-ospf6.c,v 1.2.6.1 2014/05/22 15:51:20 yamt Exp $"); 31 #endif 32 #endif 33 34 #ifdef HAVE_CONFIG_H 35 #include "config.h" 36 #endif 37 38 #include <tcpdump-stdinc.h> 39 40 #include <stdio.h> 41 #include <string.h> 42 43 #include "interface.h" 44 #include "addrtoname.h" 45 #include "extract.h" 46 47 #include "ospf.h" 48 #include "ospf6.h" 49 50 static const struct tok ospf6_option_values[] = { 51 { OSPF6_OPTION_V6, "V6" }, 52 { OSPF6_OPTION_E, "External" }, 53 { OSPF6_OPTION_MC, "Multicast" }, 54 { OSPF6_OPTION_N, "NSSA" }, 55 { OSPF6_OPTION_R, "Router" }, 56 { OSPF6_OPTION_DC, "Demand Circuit" }, 57 { 0, NULL } 58 }; 59 60 static const struct tok ospf6_rla_flag_values[] = { 61 { RLA_FLAG_B, "ABR" }, 62 { RLA_FLAG_E, "External" }, 63 { RLA_FLAG_V, "Virtual-Link Endpoint" }, 64 { RLA_FLAG_W, "Wildcard Receiver" }, 65 { RLA_FLAG_N, "NSSA Translator" }, 66 { 0, NULL } 67 }; 68 69 static const struct tok ospf6_asla_flag_values[] = { 70 { ASLA_FLAG_EXTERNAL, "External Type 2" }, 71 { ASLA_FLAG_FWDADDR, "Fforwarding" }, 72 { ASLA_FLAG_ROUTETAG, "Tag" }, 73 { 0, NULL } 74 }; 75 76 static const struct tok ospf6_type_values[] = { 77 { OSPF_TYPE_HELLO, "Hello" }, 78 { OSPF_TYPE_DD, "Database Description" }, 79 { OSPF_TYPE_LS_REQ, "LS-Request" }, 80 { OSPF_TYPE_LS_UPDATE, "LS-Update" }, 81 { OSPF_TYPE_LS_ACK, "LS-Ack" }, 82 { 0, NULL } 83 }; 84 85 static const struct tok ospf6_lsa_values[] = { 86 { LS_TYPE_ROUTER, "Router" }, 87 { LS_TYPE_NETWORK, "Network" }, 88 { LS_TYPE_INTER_AP, "Inter-Area Prefix" }, 89 { LS_TYPE_INTER_AR, "Inter-Area Router" }, 90 { LS_TYPE_ASE, "External" }, 91 { LS_TYPE_GROUP, "Multicast Group" }, 92 { LS_TYPE_NSSA, "NSSA" }, 93 { LS_TYPE_LINK, "Link" }, 94 { LS_TYPE_INTRA_AP, "Intra-Area Prefix" }, 95 { LS_TYPE_INTRA_ATE, "Intra-Area TE" }, 96 { LS_TYPE_GRACE, "Grace" }, 97 { 0, NULL } 98 }; 99 100 static const struct tok ospf6_ls_scope_values[] = { 101 { LS_SCOPE_LINKLOCAL, "Link Local" }, 102 { LS_SCOPE_AREA, "Area Local" }, 103 { LS_SCOPE_AS, "Domain Wide" }, 104 { 0, NULL } 105 }; 106 107 static const struct tok ospf6_dd_flag_values[] = { 108 { OSPF6_DB_INIT, "Init" }, 109 { OSPF6_DB_MORE, "More" }, 110 { OSPF6_DB_MASTER, "Master" }, 111 { 0, NULL } 112 }; 113 114 static const struct tok ospf6_lsa_prefix_option_values[] = { 115 { LSA_PREFIX_OPT_NU, "No Unicast" }, 116 { LSA_PREFIX_OPT_LA, "Local address" }, 117 { LSA_PREFIX_OPT_MC, "Multicast" }, 118 { LSA_PREFIX_OPT_P, "Propagate" }, 119 { LSA_PREFIX_OPT_DN, "Down" }, 120 { 0, NULL } 121 }; 122 123 static char tstr[] = " [|ospf3]"; 124 125 /* Forwards */ 126 static void ospf6_print_ls_type(u_int, const rtrid_t *); 127 static int ospf6_print_lshdr(const struct lsa6_hdr *); 128 static int ospf6_print_lsa(const struct lsa6 *); 129 static int ospf6_decode_v3(const struct ospf6hdr *, const u_char *); 130 131 132 static void 133 ospf6_print_ls_type(register u_int ls_type, register const rtrid_t *ls_stateid) 134 { 135 printf("\n\t %s LSA (%d), %s Scope%s, LSA-ID %s", 136 tok2str(ospf6_lsa_values, "Unknown", ls_type & LS_TYPE_MASK), 137 ls_type & LS_TYPE_MASK, 138 tok2str(ospf6_ls_scope_values, "Unknown", ls_type & LS_SCOPE_MASK), 139 ls_type &0x8000 ? ", transitive" : "", /* U-bit */ 140 ipaddr_string(ls_stateid)); 141 } 142 143 static int 144 ospf6_print_lshdr(register const struct lsa6_hdr *lshp) 145 { 146 147 TCHECK(lshp->ls_type); 148 TCHECK(lshp->ls_seq); 149 150 printf("\n\t Advertising Router %s, seq 0x%08x, age %us, length %u", 151 ipaddr_string(&lshp->ls_router), 152 EXTRACT_32BITS(&lshp->ls_seq), 153 EXTRACT_16BITS(&lshp->ls_age), 154 EXTRACT_16BITS(&lshp->ls_length)-(u_int)sizeof(struct lsa6_hdr)); 155 156 ospf6_print_ls_type(EXTRACT_16BITS(&lshp->ls_type), &lshp->ls_stateid); 157 158 return (0); 159 trunc: 160 return (1); 161 } 162 163 static int 164 ospf6_print_lsaprefix(const u_int8_t *tptr, u_int lsa_length) 165 { 166 const struct lsa6_prefix *lsapp = (struct lsa6_prefix *)tptr; 167 u_int wordlen; 168 struct in6_addr prefix; 169 170 if (lsa_length < sizeof (*lsapp) - 4) 171 goto trunc; 172 lsa_length -= sizeof (*lsapp) - 4; 173 TCHECK2(*lsapp, sizeof (*lsapp) - 4); 174 wordlen = (lsapp->lsa_p_len + 31) / 32; 175 if (wordlen * 4 > sizeof(struct in6_addr)) { 176 printf(" bogus prefixlen /%d", lsapp->lsa_p_len); 177 goto trunc; 178 } 179 if (lsa_length < wordlen * 4) 180 goto trunc; 181 lsa_length -= wordlen * 4; 182 TCHECK2(lsapp->lsa_p_prefix, wordlen * 4); 183 memset(&prefix, 0, sizeof(prefix)); 184 memcpy(&prefix, lsapp->lsa_p_prefix, wordlen * 4); 185 printf("\n\t\t%s/%d", ip6addr_string(&prefix), 186 lsapp->lsa_p_len); 187 if (lsapp->lsa_p_opt) { 188 printf(", Options [%s]", 189 bittok2str(ospf6_lsa_prefix_option_values, 190 "none", lsapp->lsa_p_opt)); 191 } 192 printf(", metric %u", EXTRACT_16BITS(&lsapp->lsa_p_metric)); 193 return sizeof(*lsapp) - 4 + wordlen * 4; 194 195 trunc: 196 return -1; 197 } 198 199 200 /* 201 * Print a single link state advertisement. If truncated return 1, else 0. 202 */ 203 static int 204 ospf6_print_lsa(register const struct lsa6 *lsap) 205 { 206 register const struct rlalink6 *rlp; 207 #if 0 208 register const struct tos_metric *tosp; 209 #endif 210 register const rtrid_t *ap; 211 #if 0 212 register const struct aslametric *almp; 213 register const struct mcla *mcp; 214 #endif 215 register const struct llsa *llsap; 216 register const struct lsa6_prefix *lsapp; 217 #if 0 218 register const u_int32_t *lp; 219 #endif 220 register u_int prefixes; 221 register int bytelen; 222 register u_int length, lsa_length; 223 u_int32_t flags32; 224 const u_int8_t *tptr; 225 226 if (ospf6_print_lshdr(&lsap->ls_hdr)) 227 return (1); 228 TCHECK(lsap->ls_hdr.ls_length); 229 length = EXTRACT_16BITS(&lsap->ls_hdr.ls_length); 230 231 /* 232 * The LSA length includes the length of the header; 233 * it must have a value that's at least that length. 234 * If it does, find the length of what follows the 235 * header. 236 */ 237 if (length < sizeof(struct lsa6_hdr)) 238 return (1); 239 lsa_length = length - sizeof(struct lsa6_hdr); 240 tptr = (u_int8_t *)lsap+sizeof(struct lsa6_hdr); 241 242 switch (EXTRACT_16BITS(&lsap->ls_hdr.ls_type)) { 243 case LS_TYPE_ROUTER | LS_SCOPE_AREA: 244 if (lsa_length < sizeof (lsap->lsa_un.un_rla.rla_options)) 245 return (1); 246 lsa_length -= sizeof (lsap->lsa_un.un_rla.rla_options); 247 TCHECK(lsap->lsa_un.un_rla.rla_options); 248 printf("\n\t Options [%s]", 249 bittok2str(ospf6_option_values, "none", 250 EXTRACT_32BITS(&lsap->lsa_un.un_rla.rla_options))); 251 printf(", RLA-Flags [%s]", 252 bittok2str(ospf6_rla_flag_values, "none", 253 lsap->lsa_un.un_rla.rla_flags)); 254 255 rlp = lsap->lsa_un.un_rla.rla_link; 256 while (lsa_length != 0) { 257 if (lsa_length < sizeof (*rlp)) 258 return (1); 259 lsa_length -= sizeof (*rlp); 260 TCHECK(*rlp); 261 switch (rlp->link_type) { 262 263 case RLA_TYPE_VIRTUAL: 264 printf("\n\t Virtual Link: Neighbor Router-ID %s" 265 "\n\t Neighbor Interface-ID %s, Interface %s", 266 ipaddr_string(&rlp->link_nrtid), 267 ipaddr_string(&rlp->link_nifid), 268 ipaddr_string(&rlp->link_ifid)); 269 break; 270 271 case RLA_TYPE_ROUTER: 272 printf("\n\t Neighbor Router-ID %s" 273 "\n\t Neighbor Interface-ID %s, Interface %s", 274 ipaddr_string(&rlp->link_nrtid), 275 ipaddr_string(&rlp->link_nifid), 276 ipaddr_string(&rlp->link_ifid)); 277 break; 278 279 case RLA_TYPE_TRANSIT: 280 printf("\n\t Neighbor Network-ID %s" 281 "\n\t Neighbor Interface-ID %s, Interface %s", 282 ipaddr_string(&rlp->link_nrtid), 283 ipaddr_string(&rlp->link_nifid), 284 ipaddr_string(&rlp->link_ifid)); 285 break; 286 287 default: 288 printf("\n\t Unknown Router Links Type 0x%02x", 289 rlp->link_type); 290 return (0); 291 } 292 printf(", metric %d", EXTRACT_16BITS(&rlp->link_metric)); 293 rlp++; 294 } 295 break; 296 297 case LS_TYPE_NETWORK | LS_SCOPE_AREA: 298 if (lsa_length < sizeof (lsap->lsa_un.un_nla.nla_options)) 299 return (1); 300 lsa_length -= sizeof (lsap->lsa_un.un_nla.nla_options); 301 TCHECK(lsap->lsa_un.un_nla.nla_options); 302 printf("\n\t Options [%s]", 303 bittok2str(ospf6_option_values, "none", 304 EXTRACT_32BITS(&lsap->lsa_un.un_nla.nla_options))); 305 306 printf("\n\t Connected Routers:"); 307 ap = lsap->lsa_un.un_nla.nla_router; 308 while (lsa_length != 0) { 309 if (lsa_length < sizeof (*ap)) 310 return (1); 311 lsa_length -= sizeof (*ap); 312 TCHECK(*ap); 313 printf("\n\t\t%s", ipaddr_string(ap)); 314 ++ap; 315 } 316 break; 317 318 case LS_TYPE_INTER_AP | LS_SCOPE_AREA: 319 if (lsa_length < sizeof (lsap->lsa_un.un_inter_ap.inter_ap_metric)) 320 return (1); 321 lsa_length -= sizeof (lsap->lsa_un.un_inter_ap.inter_ap_metric); 322 TCHECK(lsap->lsa_un.un_inter_ap.inter_ap_metric); 323 printf(", metric %u", 324 EXTRACT_32BITS(&lsap->lsa_un.un_inter_ap.inter_ap_metric) & SLA_MASK_METRIC); 325 326 tptr = (u_int8_t *)lsap->lsa_un.un_inter_ap.inter_ap_prefix; 327 while (lsa_length != 0) { 328 bytelen = ospf6_print_lsaprefix(tptr, lsa_length); 329 if (bytelen < 0) 330 goto trunc; 331 lsa_length -= bytelen; 332 tptr += bytelen; 333 } 334 break; 335 336 case LS_TYPE_ASE | LS_SCOPE_AS: 337 if (lsa_length < sizeof (lsap->lsa_un.un_asla.asla_metric)) 338 return (1); 339 lsa_length -= sizeof (lsap->lsa_un.un_asla.asla_metric); 340 TCHECK(lsap->lsa_un.un_asla.asla_metric); 341 flags32 = EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric); 342 printf("\n\t Flags [%s]", 343 bittok2str(ospf6_asla_flag_values, "none", flags32)); 344 printf(" metric %u", 345 EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric) & 346 ASLA_MASK_METRIC); 347 348 tptr = (u_int8_t *)lsap->lsa_un.un_asla.asla_prefix; 349 lsapp = (struct lsa6_prefix *)tptr; 350 bytelen = ospf6_print_lsaprefix(tptr, lsa_length); 351 if (bytelen < 0) 352 goto trunc; 353 lsa_length -= bytelen; 354 tptr += bytelen; 355 356 if ((flags32 & ASLA_FLAG_FWDADDR) != 0) { 357 struct in6_addr *fwdaddr6; 358 359 fwdaddr6 = (struct in6_addr *)tptr; 360 if (lsa_length < sizeof (*fwdaddr6)) 361 return (1); 362 lsa_length -= sizeof (*fwdaddr6); 363 TCHECK(*fwdaddr6); 364 printf(" forward %s", 365 ip6addr_string(fwdaddr6)); 366 tptr += sizeof(*fwdaddr6); 367 } 368 369 if ((flags32 & ASLA_FLAG_ROUTETAG) != 0) { 370 if (lsa_length < sizeof (u_int32_t)) 371 return (1); 372 lsa_length -= sizeof (u_int32_t); 373 TCHECK(*(u_int32_t *)tptr); 374 printf(" tag %s", 375 ipaddr_string((u_int32_t *)tptr)); 376 tptr += sizeof(u_int32_t); 377 } 378 379 if (lsapp->lsa_p_metric) { 380 if (lsa_length < sizeof (u_int32_t)) 381 return (1); 382 lsa_length -= sizeof (u_int32_t); 383 TCHECK(*(u_int32_t *)tptr); 384 printf(" RefLSID: %s", 385 ipaddr_string((u_int32_t *)tptr)); 386 tptr += sizeof(u_int32_t); 387 } 388 break; 389 390 case LS_TYPE_LINK: 391 /* Link LSA */ 392 llsap = &lsap->lsa_un.un_llsa; 393 if (lsa_length < sizeof (llsap->llsa_priandopt)) 394 return (1); 395 lsa_length -= sizeof (llsap->llsa_priandopt); 396 TCHECK(llsap->llsa_priandopt); 397 printf("\n\t Options [%s]", 398 bittok2str(ospf6_option_values, "none", 399 EXTRACT_32BITS(&llsap->llsa_options))); 400 401 if (lsa_length < sizeof (llsap->llsa_lladdr) + sizeof (llsap->llsa_nprefix)) 402 return (1); 403 lsa_length -= sizeof (llsap->llsa_lladdr) + sizeof (llsap->llsa_nprefix); 404 prefixes = EXTRACT_32BITS(&llsap->llsa_nprefix); 405 printf("\n\t Priority %d, Link-local address %s, Prefixes %d:", 406 llsap->llsa_priority, 407 ip6addr_string(&llsap->llsa_lladdr), 408 prefixes); 409 410 tptr = (u_int8_t *)llsap->llsa_prefix; 411 while (prefixes > 0) { 412 bytelen = ospf6_print_lsaprefix(tptr, lsa_length); 413 if (bytelen < 0) 414 goto trunc; 415 prefixes--; 416 lsa_length -= bytelen; 417 tptr += bytelen; 418 } 419 break; 420 421 case LS_TYPE_INTRA_AP | LS_SCOPE_AREA: 422 /* Intra-Area-Prefix LSA */ 423 if (lsa_length < sizeof (lsap->lsa_un.un_intra_ap.intra_ap_rtid)) 424 return (1); 425 lsa_length -= sizeof (lsap->lsa_un.un_intra_ap.intra_ap_rtid); 426 TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_rtid); 427 ospf6_print_ls_type( 428 EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_lstype), 429 &lsap->lsa_un.un_intra_ap.intra_ap_lsid); 430 431 if (lsa_length < sizeof (lsap->lsa_un.un_intra_ap.intra_ap_nprefix)) 432 return (1); 433 lsa_length -= sizeof (lsap->lsa_un.un_intra_ap.intra_ap_nprefix); 434 TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_nprefix); 435 prefixes = EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_nprefix); 436 printf("\n\t Prefixes %d:", prefixes); 437 438 tptr = (u_int8_t *)lsap->lsa_un.un_intra_ap.intra_ap_prefix; 439 while (prefixes > 0) { 440 bytelen = ospf6_print_lsaprefix(tptr, lsa_length); 441 if (bytelen < 0) 442 goto trunc; 443 prefixes--; 444 lsa_length -= bytelen; 445 tptr += bytelen; 446 } 447 break; 448 449 case LS_TYPE_GRACE | LS_SCOPE_LINKLOCAL: 450 if (ospf_print_grace_lsa(tptr, lsa_length) == -1) { 451 return 1; 452 } 453 break; 454 455 case LS_TYPE_INTRA_ATE | LS_SCOPE_LINKLOCAL: 456 if (ospf_print_te_lsa(tptr, lsa_length) == -1) { 457 return 1; 458 } 459 break; 460 461 default: 462 if(!print_unknown_data(tptr, 463 "\n\t ", 464 lsa_length)) { 465 return (1); 466 } 467 break; 468 } 469 470 return (0); 471 trunc: 472 return (1); 473 } 474 475 static int 476 ospf6_decode_v3(register const struct ospf6hdr *op, 477 register const u_char *dataend) 478 { 479 register const rtrid_t *ap; 480 register const struct lsr6 *lsrp; 481 register const struct lsa6_hdr *lshp; 482 register const struct lsa6 *lsap; 483 register int i; 484 485 switch (op->ospf6_type) { 486 487 case OSPF_TYPE_HELLO: 488 printf("\n\tOptions [%s]", 489 bittok2str(ospf6_option_values, "none", 490 EXTRACT_32BITS(&op->ospf6_hello.hello_options))); 491 492 TCHECK(op->ospf6_hello.hello_deadint); 493 printf("\n\t Hello Timer %us, Dead Timer %us, Interface-ID %s, Priority %u", 494 EXTRACT_16BITS(&op->ospf6_hello.hello_helloint), 495 EXTRACT_16BITS(&op->ospf6_hello.hello_deadint), 496 ipaddr_string(&op->ospf6_hello.hello_ifid), 497 op->ospf6_hello.hello_priority); 498 499 TCHECK(op->ospf6_hello.hello_dr); 500 if (op->ospf6_hello.hello_dr != 0) 501 printf("\n\t Designated Router %s", 502 ipaddr_string(&op->ospf6_hello.hello_dr)); 503 TCHECK(op->ospf6_hello.hello_bdr); 504 if (op->ospf6_hello.hello_bdr != 0) 505 printf(", Backup Designated Router %s", 506 ipaddr_string(&op->ospf6_hello.hello_bdr)); 507 if (vflag) { 508 printf("\n\t Neighbor List:"); 509 ap = op->ospf6_hello.hello_neighbor; 510 while ((u_char *)ap < dataend) { 511 TCHECK(*ap); 512 printf("\n\t %s", ipaddr_string(ap)); 513 ++ap; 514 } 515 } 516 break; /* HELLO */ 517 518 case OSPF_TYPE_DD: 519 TCHECK(op->ospf6_db.db_options); 520 printf("\n\tOptions [%s]", 521 bittok2str(ospf6_option_values, "none", 522 EXTRACT_32BITS(&op->ospf6_db.db_options))); 523 TCHECK(op->ospf6_db.db_flags); 524 printf(", DD Flags [%s]", 525 bittok2str(ospf6_dd_flag_values,"none",op->ospf6_db.db_flags)); 526 527 TCHECK(op->ospf6_db.db_seq); 528 printf(", MTU %u, DD-Sequence 0x%08x", 529 EXTRACT_16BITS(&op->ospf6_db.db_mtu), 530 EXTRACT_32BITS(&op->ospf6_db.db_seq)); 531 532 /* Print all the LS adv's */ 533 lshp = op->ospf6_db.db_lshdr; 534 while (!ospf6_print_lshdr(lshp)) { 535 ++lshp; 536 } 537 break; 538 539 case OSPF_TYPE_LS_REQ: 540 if (vflag) { 541 lsrp = op->ospf6_lsr; 542 while ((u_char *)lsrp < dataend) { 543 TCHECK(*lsrp); 544 printf("\n\t Advertising Router %s", 545 ipaddr_string(&lsrp->ls_router)); 546 ospf6_print_ls_type(EXTRACT_16BITS(&lsrp->ls_type), 547 &lsrp->ls_stateid); 548 ++lsrp; 549 } 550 } 551 break; 552 553 case OSPF_TYPE_LS_UPDATE: 554 if (vflag) { 555 lsap = op->ospf6_lsu.lsu_lsa; 556 TCHECK(op->ospf6_lsu.lsu_count); 557 i = EXTRACT_32BITS(&op->ospf6_lsu.lsu_count); 558 while (i--) { 559 if (ospf6_print_lsa(lsap)) 560 goto trunc; 561 lsap = (struct lsa6 *)((u_char *)lsap + 562 EXTRACT_16BITS(&lsap->ls_hdr.ls_length)); 563 } 564 } 565 break; 566 567 568 case OSPF_TYPE_LS_ACK: 569 if (vflag) { 570 lshp = op->ospf6_lsa.lsa_lshdr; 571 572 while (!ospf6_print_lshdr(lshp)) { 573 ++lshp; 574 } 575 } 576 break; 577 578 default: 579 break; 580 } 581 return (0); 582 trunc: 583 return (1); 584 } 585 586 void 587 ospf6_print(register const u_char *bp, register u_int length) 588 { 589 register const struct ospf6hdr *op; 590 register const u_char *dataend; 591 register const char *cp; 592 593 op = (struct ospf6hdr *)bp; 594 595 /* If the type is valid translate it, or just print the type */ 596 /* value. If it's not valid, say so and return */ 597 TCHECK(op->ospf6_type); 598 cp = tok2str(ospf6_type_values, "unknown LS-type", op->ospf6_type); 599 printf("OSPFv%u, %s, length %d", op->ospf6_version, cp, length); 600 if (*cp == 'u') { 601 return; 602 } 603 604 if(!vflag) { /* non verbose - so lets bail out here */ 605 return; 606 } 607 608 TCHECK(op->ospf6_len); 609 if (length != EXTRACT_16BITS(&op->ospf6_len)) { 610 printf(" [len %d]", EXTRACT_16BITS(&op->ospf6_len)); 611 return; 612 } 613 dataend = bp + length; 614 615 /* Print the routerid if it is not the same as the source */ 616 TCHECK(op->ospf6_routerid); 617 printf("\n\tRouter-ID %s", ipaddr_string(&op->ospf6_routerid)); 618 619 TCHECK(op->ospf6_areaid); 620 if (op->ospf6_areaid != 0) 621 printf(", Area %s", ipaddr_string(&op->ospf6_areaid)); 622 else 623 printf(", Backbone Area"); 624 TCHECK(op->ospf6_instanceid); 625 if (op->ospf6_instanceid) 626 printf(", Instance %u", op->ospf6_instanceid); 627 628 /* Do rest according to version. */ 629 switch (op->ospf6_version) { 630 631 case 3: 632 /* ospf version 3 */ 633 if (ospf6_decode_v3(op, dataend)) 634 goto trunc; 635 break; 636 637 default: 638 printf(" ospf [version %d]", op->ospf6_version); 639 break; 640 } /* end switch on version */ 641 642 return; 643 trunc: 644 fputs(tstr, stdout); 645 } 646
Indexes created Sat Mar 14 00:24:00 UTC 2026