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@mitchell.cit.cornell.edu) 22 */ 23 24 #ifndef lint 25 static const char rcsid[] _U_ = 26 "@(#) $Header: /tcpdump/master/tcpdump/print-ospf.c,v 1.45.2.4 2004/03/24 02:44:30 guy Exp $ (LBL)"; 27 #endif 28 29 #ifdef HAVE_CONFIG_H 30 #include "config.h" 31 #endif 32 33 #include <tcpdump-stdinc.h> 34 35 #include <stdio.h> 36 37 #include "interface.h" 38 #include "addrtoname.h" 39 #include "extract.h" 40 #include "gmpls.h" 41 42 #include "ospf.h" 43 44 #include "ip.h" 45 46 static struct tok ospf_option_values[] = { 47 { OSPF_OPTION_T, "TOS" }, 48 { OSPF_OPTION_E, "External" }, 49 { OSPF_OPTION_MC, "Multicast" }, 50 { OSPF_OPTION_NP, "NSSA" }, 51 { OSPF_OPTION_EA, "Advertise External" }, 52 { OSPF_OPTION_DC, "Demand Circuit" }, 53 { OSPF_OPTION_O, "Opaque" }, 54 { 0, NULL } 55 }; 56 57 static struct tok ospf_authtype_values[] = { 58 { OSPF_AUTH_NONE, "none" }, 59 { OSPF_AUTH_NONE, "simple" }, 60 { OSPF_AUTH_MD5, "MD5" }, 61 { 0, NULL } 62 }; 63 64 static struct tok ospf_rla_flag_values[] = { 65 { RLA_FLAG_B, "ABR" }, 66 { RLA_FLAG_E, "ASBR" }, 67 { RLA_FLAG_W1, "Virtual" }, 68 { RLA_FLAG_W2, "W2" }, 69 { 0, NULL } 70 }; 71 72 static struct tok type2str[] = { 73 { OSPF_TYPE_UMD, "UMD" }, 74 { OSPF_TYPE_HELLO, "Hello" }, 75 { OSPF_TYPE_DD, "Database Description" }, 76 { OSPF_TYPE_LS_REQ, "LS-Request" }, 77 { OSPF_TYPE_LS_UPDATE, "LS-Update" }, 78 { OSPF_TYPE_LS_ACK, "LS-Ack" }, 79 { 0, NULL } 80 }; 81 82 static struct tok lsa_values[] = { 83 { LS_TYPE_ROUTER, "Router" }, 84 { LS_TYPE_NETWORK, "Network" }, 85 { LS_TYPE_SUM_IP, "Summary" }, 86 { LS_TYPE_SUM_ABR, "ASBR Summary" }, 87 { LS_TYPE_ASE, "External" }, 88 { LS_TYPE_GROUP, "Multicast Group" }, 89 { LS_TYPE_NSSA, "NSSA" }, 90 { LS_TYPE_OPAQUE_LL, "Link Local Opaque" }, 91 { LS_TYPE_OPAQUE_AL, "Area Local Opaque" }, 92 { LS_TYPE_OPAQUE_DW, "Domain Wide Opaque" }, 93 { 0, NULL } 94 }; 95 96 static struct tok ospf_dd_flag_values[] = { 97 { OSPF_DB_INIT, "Init" }, 98 { OSPF_DB_MORE, "More" }, 99 { OSPF_DB_MASTER, "Master" }, 100 { 0, NULL } 101 }; 102 103 static struct tok lsa_opaque_values[] = { 104 { LS_OPAQUE_TYPE_TE, "Traffic Engineering" }, 105 { LS_OPAQUE_TYPE_GRACE, "Graceful restart" }, 106 { 0, NULL } 107 }; 108 109 static struct tok lsa_opaque_te_tlv_values[] = { 110 { LS_OPAQUE_TE_TLV_ROUTER, "Router Address" }, 111 { LS_OPAQUE_TE_TLV_LINK, "Link" }, 112 { 0, NULL } 113 }; 114 115 static struct tok lsa_opaque_te_link_tlv_subtlv_values[] = { 116 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE, "Link Type" }, 117 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID, "Link ID" }, 118 { LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP, "Local Interface IP address" }, 119 { LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP, "Remote Interface IP address" }, 120 { LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC, "Traffic Engineering Metric" }, 121 { LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW, "Maximum Bandwidth" }, 122 { LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW, "Maximum Reservable Bandwidth" }, 123 { LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW, "Unreserved Bandwidth" }, 124 { LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP, "Administrative Group" }, 125 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" }, 126 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE, "Link Protection Type" }, 127 { LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR, "Interface Switching Capability" }, 128 { LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP, "Shared Risk Link Group" }, 129 { 0, NULL } 130 }; 131 132 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_PTP 1 /* rfc3630 */ 133 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_MA 2 /* rfc3630 */ 134 135 static struct tok lsa_opaque_te_tlv_link_type_sub_tlv_values[] = { 136 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_PTP, "Point-to-point" }, 137 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_MA, "Multi-Access" }, 138 { 0, NULL } 139 }; 140 141 static char tstr[] = " [|ospf]"; 142 143 #ifdef WIN32 144 #define inline __inline 145 #endif /* WIN32 */ 146 147 static int ospf_print_lshdr(const struct lsa_hdr *); 148 static const u_char *ospf_print_lsa(const struct lsa *); 149 static int ospf_decode_v2(const struct ospfhdr *, const u_char *); 150 151 static int 152 ospf_print_lshdr(register const struct lsa_hdr *lshp) 153 { 154 u_int ls_length; 155 156 TCHECK(lshp->ls_length); 157 ls_length = EXTRACT_16BITS(&lshp->ls_length); 158 if (ls_length < sizeof(struct lsa_hdr)) { 159 printf("\n\t Bogus length %u < %lu", ls_length, 160 (unsigned long)sizeof(struct lsa_hdr)); 161 return(-1); 162 } 163 164 TCHECK(lshp->ls_seq); /* XXX - ls_length check checked this */ 165 printf("\n\t Advertising Router: %s, seq 0x%08x, age %us, length: %u", 166 ipaddr_string(&lshp->ls_router), 167 EXTRACT_32BITS(&lshp->ls_seq), 168 EXTRACT_16BITS(&lshp->ls_age), 169 ls_length-(u_int)sizeof(struct lsa_hdr)); 170 171 TCHECK(lshp->ls_type); /* XXX - ls_length check checked this */ 172 switch (lshp->ls_type) { 173 /* the LSA header for opaque LSAs was slightly changed */ 174 case LS_TYPE_OPAQUE_LL: 175 case LS_TYPE_OPAQUE_AL: 176 case LS_TYPE_OPAQUE_DW: 177 printf("\n\t %s LSA (%d), Opaque-Type: %s LSA (%u), Opaque-ID: %u", 178 tok2str(lsa_values,"unknown",lshp->ls_type), 179 lshp->ls_type, 180 181 tok2str(lsa_opaque_values, 182 "unknown", 183 *(&lshp->un_lsa_id.opaque_field.opaque_type)), 184 *(&lshp->un_lsa_id.opaque_field.opaque_type), 185 EXTRACT_24BITS(&lshp->un_lsa_id.opaque_field.opaque_id) 186 187 ); 188 break; 189 190 /* all other LSA types use regular style LSA headers */ 191 default: 192 printf("\n\t %s LSA (%d), LSA-ID: %s", 193 tok2str(lsa_values,"unknown",lshp->ls_type), 194 lshp->ls_type, 195 ipaddr_string(&lshp->un_lsa_id.lsa_id)); 196 break; 197 } 198 199 TCHECK(lshp->ls_options); /* XXX - ls_length check checked this */ 200 printf("\n\t Options: [%s]", bittok2str(ospf_option_values,"none",lshp->ls_options)); 201 202 return (ls_length); 203 trunc: 204 return (-1); 205 } 206 207 /* 208 * Print a single link state advertisement. If truncated or if LSA length 209 * field is less than the length of the LSA header, return NULl, else 210 * return pointer to data past end of LSA. 211 */ 212 static const u_int8_t * 213 ospf_print_lsa(register const struct lsa *lsap) 214 { 215 register const u_int8_t *ls_end; 216 register const struct rlalink *rlp; 217 register const struct tos_metric *tosp; 218 register const struct in_addr *ap; 219 register const struct aslametric *almp; 220 register const struct mcla *mcp; 221 register const u_int32_t *lp; 222 register int j, k, tlv_type, tlv_length, subtlv_type, subtlv_length, priority_level; 223 register int ls_length; 224 const u_int8_t *tptr; 225 int count_srlg; 226 union { /* int to float conversion buffer for several subTLVs */ 227 float f; 228 u_int32_t i; 229 } bw; 230 231 tptr = (u_int8_t *)lsap->lsa_un.un_unknown; /* squelch compiler warnings */ 232 ls_length = ospf_print_lshdr(&lsap->ls_hdr); 233 if (ls_length == -1) 234 return(NULL); 235 ls_end = (u_int8_t *)lsap + ls_length; 236 ls_length -= sizeof(struct lsa_hdr); 237 238 switch (lsap->ls_hdr.ls_type) { 239 240 case LS_TYPE_ROUTER: 241 TCHECK(lsap->lsa_un.un_rla.rla_flags); 242 printf("\n\t Router LSA Options: [%s]", bittok2str(ospf_rla_flag_values,"none",lsap->lsa_un.un_rla.rla_flags)); 243 244 TCHECK(lsap->lsa_un.un_rla.rla_count); 245 j = EXTRACT_16BITS(&lsap->lsa_un.un_rla.rla_count); 246 TCHECK(lsap->lsa_un.un_rla.rla_link); 247 rlp = lsap->lsa_un.un_rla.rla_link; 248 while (j--) { 249 TCHECK(*rlp); 250 switch (rlp->link_type) { 251 252 case RLA_TYPE_VIRTUAL: 253 printf("\n\t Virtual Link: Neighbor Router-ID: %s, Interface Address: %s", 254 ipaddr_string(&rlp->link_id), 255 ipaddr_string(&rlp->link_data)); 256 break; 257 258 case RLA_TYPE_ROUTER: 259 printf("\n\t Neighbor Router-ID: %s, Interface Address: %s", 260 ipaddr_string(&rlp->link_id), 261 ipaddr_string(&rlp->link_data)); 262 break; 263 264 case RLA_TYPE_TRANSIT: 265 printf("\n\t Neighbor Network-ID: %s, Interface Address: %s", 266 ipaddr_string(&rlp->link_id), 267 ipaddr_string(&rlp->link_data)); 268 break; 269 270 case RLA_TYPE_STUB: 271 printf("\n\t Stub Network: %s, Mask: %s", 272 ipaddr_string(&rlp->link_id), 273 ipaddr_string(&rlp->link_data)); 274 break; 275 276 default: 277 printf("\n\t Unknown Router Link Type (%u)", 278 rlp->link_type); 279 return (ls_end); 280 } 281 printf(", tos 0, metric: %d", EXTRACT_16BITS(&rlp->link_tos0metric)); 282 tosp = (struct tos_metric *) 283 ((sizeof rlp->link_tos0metric) + (u_char *) rlp); 284 for (k = 0; k < (int) rlp->link_toscount; ++k, ++tosp) { 285 TCHECK(*tosp); 286 printf(", tos %d, metric: %d", 287 tosp->tos_type, 288 EXTRACT_16BITS(&tosp->tos_metric)); 289 } 290 rlp = (struct rlalink *)((u_char *)(rlp + 1) + 291 ((rlp->link_toscount) * sizeof(*tosp))); 292 } 293 break; 294 295 case LS_TYPE_NETWORK: 296 TCHECK(lsap->lsa_un.un_nla.nla_mask); 297 printf("\n\t Mask %s\n\t Connected Routers:", 298 ipaddr_string(&lsap->lsa_un.un_nla.nla_mask)); 299 ap = lsap->lsa_un.un_nla.nla_router; 300 while ((u_char *)ap < ls_end) { 301 TCHECK(*ap); 302 printf("\n\t %s", ipaddr_string(ap)); 303 ++ap; 304 } 305 break; 306 307 case LS_TYPE_SUM_IP: 308 TCHECK(lsap->lsa_un.un_nla.nla_mask); 309 printf("\n\t Mask %s", 310 ipaddr_string(&lsap->lsa_un.un_sla.sla_mask)); 311 TCHECK(lsap->lsa_un.un_sla.sla_tosmetric); 312 lp = lsap->lsa_un.un_sla.sla_tosmetric; 313 /* suppress tos if its not supported */ 314 if(!((lsap->ls_hdr.ls_options)&OSPF_OPTION_T)) { 315 printf(", metric: %u", EXTRACT_32BITS(lp)&SLA_MASK_METRIC); 316 break; 317 } 318 while ((u_char *)lp < ls_end) { 319 register u_int32_t ul; 320 321 TCHECK(*lp); 322 ul = EXTRACT_32BITS(lp); 323 printf(", tos %d metric %d", 324 (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS, 325 ul & SLA_MASK_METRIC); 326 ++lp; 327 } 328 break; 329 330 case LS_TYPE_SUM_ABR: 331 TCHECK(lsap->lsa_un.un_sla.sla_tosmetric); 332 lp = lsap->lsa_un.un_sla.sla_tosmetric; 333 /* suppress tos if its not supported */ 334 if(!((lsap->ls_hdr.ls_options)&OSPF_OPTION_T)) { 335 printf(", metric: %u", EXTRACT_32BITS(lp)&SLA_MASK_METRIC); 336 break; 337 } 338 while ((u_char *)lp < ls_end) { 339 register u_int32_t ul; 340 341 TCHECK(*lp); 342 ul = EXTRACT_32BITS(lp); 343 printf(", tos %d metric %d", 344 (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS, 345 ul & SLA_MASK_METRIC); 346 ++lp; 347 } 348 break; 349 350 case LS_TYPE_ASE: 351 TCHECK(lsap->lsa_un.un_nla.nla_mask); 352 printf("\n\t Mask %s", 353 ipaddr_string(&lsap->lsa_un.un_asla.asla_mask)); 354 355 TCHECK(lsap->lsa_un.un_sla.sla_tosmetric); 356 almp = lsap->lsa_un.un_asla.asla_metric; 357 while ((u_char *)almp < ls_end) { 358 register u_int32_t ul; 359 360 TCHECK(almp->asla_tosmetric); 361 ul = EXTRACT_32BITS(&almp->asla_tosmetric); 362 printf(", type %d, tos %d metric:", 363 (ul & ASLA_FLAG_EXTERNAL) ? 2 : 1, 364 (ul & ASLA_MASK_TOS) >> ASLA_SHIFT_TOS); 365 if ((ul & ASLA_MASK_METRIC)==0xffffff) 366 printf(" infinite"); 367 else 368 printf(" %d", (ul & ASLA_MASK_METRIC)); 369 370 TCHECK(almp->asla_forward); 371 if (almp->asla_forward.s_addr) { 372 printf(", forward %s", 373 ipaddr_string(&almp->asla_forward)); 374 } 375 TCHECK(almp->asla_tag); 376 if (almp->asla_tag.s_addr) { 377 printf(", tag %s", 378 ipaddr_string(&almp->asla_tag)); 379 } 380 ++almp; 381 } 382 break; 383 384 case LS_TYPE_GROUP: 385 /* Multicast extensions as of 23 July 1991 */ 386 mcp = lsap->lsa_un.un_mcla; 387 while ((u_char *)mcp < ls_end) { 388 TCHECK(mcp->mcla_vid); 389 switch (EXTRACT_32BITS(&mcp->mcla_vtype)) { 390 391 case MCLA_VERTEX_ROUTER: 392 printf("\n\t Router Router-ID %s", 393 ipaddr_string(&mcp->mcla_vid)); 394 break; 395 396 case MCLA_VERTEX_NETWORK: 397 printf("\n\t Network Designated Router %s", 398 ipaddr_string(&mcp->mcla_vid)); 399 break; 400 401 default: 402 printf("\n\t unknown VertexType (%u)", 403 EXTRACT_32BITS(&mcp->mcla_vtype)); 404 break; 405 } 406 ++mcp; 407 } 408 break; 409 410 case LS_TYPE_OPAQUE_LL: /* fall through */ 411 case LS_TYPE_OPAQUE_AL: 412 case LS_TYPE_OPAQUE_DW: 413 414 switch (*(&lsap->ls_hdr.un_lsa_id.opaque_field.opaque_type)) { 415 case LS_OPAQUE_TYPE_TE: 416 tptr = (u_int8_t *)(&lsap->lsa_un.un_te_lsa_tlv.type); 417 418 while (ls_length != 0) { 419 TCHECK2(*tptr, 4); 420 if (ls_length < 4) { 421 printf("\n\t Remaining LS length %u < 4", ls_length); 422 return(ls_end); 423 } 424 tlv_type = EXTRACT_16BITS(tptr); 425 tlv_length = EXTRACT_16BITS(tptr+2); 426 tptr+=4; 427 ls_length-=4; 428 429 printf("\n\t %s TLV (%u), length: %u", 430 tok2str(lsa_opaque_te_tlv_values,"unknown",tlv_type), 431 tlv_type, 432 tlv_length); 433 434 if (tlv_length > ls_length) { 435 printf("\n\t Bogus length %u > %u", tlv_length, 436 ls_length); 437 return(ls_end); 438 } 439 ls_length-=tlv_length; 440 switch(tlv_type) { 441 case LS_OPAQUE_TE_TLV_LINK: 442 while (tlv_length != 0) { 443 if (tlv_length < 4) { 444 printf("\n\t Remaining TLV length %u < 4", 445 tlv_length); 446 return(ls_end); 447 } 448 TCHECK2(*tptr, 4); 449 subtlv_type = EXTRACT_16BITS(tptr); 450 subtlv_length = EXTRACT_16BITS(tptr+2); 451 tptr+=4; 452 tlv_length-=4; 453 454 printf("\n\t %s subTLV (%u), length: %u", 455 tok2str(lsa_opaque_te_link_tlv_subtlv_values,"unknown",subtlv_type), 456 subtlv_type, 457 subtlv_length); 458 459 TCHECK2(*tptr, subtlv_length); 460 switch(subtlv_type) { 461 case LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP: 462 printf(", 0x%08x", EXTRACT_32BITS(tptr)); 463 break; 464 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID: 465 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID: 466 printf(", %s (0x%08x)", 467 ipaddr_string(tptr), 468 EXTRACT_32BITS(tptr)); 469 if (subtlv_length == 8) /* draft-ietf-ccamp-ospf-gmpls-extensions */ 470 printf(", %s (0x%08x)", 471 ipaddr_string(tptr+4), 472 EXTRACT_32BITS(tptr+4)); 473 break; 474 case LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP: 475 case LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP: 476 printf(", %s", ipaddr_string(tptr)); 477 break; 478 case LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW: 479 case LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW: 480 bw.i = EXTRACT_32BITS(tptr); 481 printf(", %.3f Mbps", bw.f*8/1000000 ); 482 break; 483 case LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW: 484 for (priority_level = 0; priority_level < 8; priority_level++) { 485 bw.i = EXTRACT_32BITS(tptr+priority_level*4); 486 printf("\n\t\tpriority level %d: %.3f Mbps", 487 priority_level, 488 bw.f*8/1000000 ); 489 } 490 break; 491 case LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC: 492 printf(", Metric %u", EXTRACT_32BITS(tptr)); 493 break; 494 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE: 495 printf(", %s, Priority %u", 496 bittok2str(gmpls_link_prot_values, "none", *tptr), 497 *(tptr+1)); 498 break; 499 case LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR: 500 printf("\n\t\tInterface Switching Capability: %s", 501 tok2str(gmpls_switch_cap_values, "Unknown", *(tptr))); 502 printf("\n\t\tLSP Encoding: %s\n\t\tMax LSP Bandwidth:", 503 tok2str(gmpls_encoding_values, "Unknown", *(tptr+1))); 504 for (priority_level = 0; priority_level < 8; priority_level++) { 505 bw.i = EXTRACT_32BITS(tptr+4+(priority_level*4)); 506 printf("\n\t\t priority level %d: %.3f Mbps", 507 priority_level, 508 bw.f*8/1000000 ); 509 } 510 break; 511 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE: 512 printf(", %s (%u)", 513 tok2str(lsa_opaque_te_tlv_link_type_sub_tlv_values,"unknown",*tptr), 514 *tptr); 515 break; 516 517 case LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP: 518 count_srlg = subtlv_length / 4; 519 if (count_srlg != 0) 520 printf("\n\t\t Shared risk group: "); 521 while (count_srlg > 0) { 522 bw.i = EXTRACT_32BITS(tptr); 523 printf("%d",bw.i); 524 tptr+=4; 525 count_srlg--; 526 if (count_srlg > 0) 527 printf(", "); 528 } 529 break; 530 531 default: 532 if (vflag <= 1) { 533 if(!print_unknown_data(tptr,"\n\t\t",subtlv_length)) 534 return(ls_end); 535 } 536 break; 537 } 538 /* in OSPF everything has to be 32-bit aligned, including TLVs */ 539 if (subtlv_length%4 != 0) 540 subtlv_length+=4-(subtlv_length%4); 541 542 tlv_length-=subtlv_length; 543 tptr+=subtlv_length; 544 545 } 546 break; 547 548 case LS_OPAQUE_TE_TLV_ROUTER: 549 if (tlv_length < 4) { 550 printf("\n\t TLV length %u < 4", tlv_length); 551 return(ls_end); 552 } 553 TCHECK2(*tptr, 4); 554 printf(", %s", ipaddr_string(tptr)); 555 break; 556 557 default: 558 if (vflag <= 1) { 559 if(!print_unknown_data(tptr,"\n\t ",tlv_length)) 560 return(ls_end); 561 } 562 break; 563 } 564 tptr+=tlv_length; 565 } 566 break; 567 } 568 break; 569 default: 570 if (vflag <= 1) { 571 if(!print_unknown_data((u_int8_t *)lsap->lsa_un.un_unknown, 572 "\n\t ", ls_length)) 573 return(ls_end); 574 } 575 break; 576 } 577 578 /* do we want to see an additionally hexdump ? */ 579 if (vflag> 1) 580 if(!print_unknown_data((u_int8_t *)lsap->lsa_un.un_unknown, 581 "\n\t ", ls_length)) { 582 return(ls_end); 583 } 584 585 return (ls_end); 586 trunc: 587 return (NULL); 588 } 589 590 static int 591 ospf_decode_v2(register const struct ospfhdr *op, 592 register const u_char *dataend) 593 { 594 register const struct in_addr *ap; 595 register const struct lsr *lsrp; 596 register const struct lsa_hdr *lshp; 597 register const struct lsa *lsap; 598 register u_int32_t lsa_count,lsa_count_max; 599 600 switch (op->ospf_type) { 601 602 case OSPF_TYPE_UMD: 603 /* 604 * Rob Coltun's special monitoring packets; 605 * do nothing 606 */ 607 break; 608 609 case OSPF_TYPE_HELLO: 610 printf("\n\tOptions: [%s]", 611 bittok2str(ospf_option_values,"none",op->ospf_hello.hello_options)); 612 613 TCHECK(op->ospf_hello.hello_deadint); 614 printf("\n\t Hello Timer: %us, Dead Timer %us, Mask: %s, Priority: %u", 615 EXTRACT_16BITS(&op->ospf_hello.hello_helloint), 616 EXTRACT_32BITS(&op->ospf_hello.hello_deadint), 617 ipaddr_string(&op->ospf_hello.hello_mask), 618 op->ospf_hello.hello_priority); 619 620 TCHECK(op->ospf_hello.hello_dr); 621 if (op->ospf_hello.hello_dr.s_addr != 0) 622 printf("\n\t Designated Router %s", 623 ipaddr_string(&op->ospf_hello.hello_dr)); 624 625 TCHECK(op->ospf_hello.hello_bdr); 626 if (op->ospf_hello.hello_bdr.s_addr != 0) 627 printf(", Backup Designated Router %s", 628 ipaddr_string(&op->ospf_hello.hello_bdr)); 629 630 ap = op->ospf_hello.hello_neighbor; 631 if ((u_char *)ap < dataend) 632 printf("\n\t Neighbor List:"); 633 while ((u_char *)ap < dataend) { 634 TCHECK(*ap); 635 printf("\n\t %s", ipaddr_string(ap)); 636 ++ap; 637 } 638 break; /* HELLO */ 639 640 case OSPF_TYPE_DD: 641 TCHECK(op->ospf_db.db_options); 642 printf("\n\tOptions: [%s]", 643 bittok2str(ospf_option_values,"none",op->ospf_db.db_options)); 644 TCHECK(op->ospf_db.db_flags); 645 printf(", DD Flags: [%s]", 646 bittok2str(ospf_dd_flag_values,"none",op->ospf_db.db_flags)); 647 648 if (vflag) { 649 /* Print all the LS adv's */ 650 lshp = op->ospf_db.db_lshdr; 651 while (ospf_print_lshdr(lshp) != -1) { 652 ++lshp; 653 } 654 } 655 break; 656 657 case OSPF_TYPE_LS_REQ: 658 lsrp = op->ospf_lsr; 659 while ((u_char *)lsrp < dataend) { 660 TCHECK(*lsrp); 661 662 printf("\n\t Advertising Router: %s, %s LSA (%u)", 663 ipaddr_string(&lsrp->ls_router), 664 tok2str(lsa_values,"unknown",EXTRACT_32BITS(lsrp->ls_type)), 665 EXTRACT_32BITS(&lsrp->ls_type)); 666 667 switch (EXTRACT_32BITS(lsrp->ls_type)) { 668 /* the LSA header for opaque LSAs was slightly changed */ 669 case LS_TYPE_OPAQUE_LL: 670 case LS_TYPE_OPAQUE_AL: 671 case LS_TYPE_OPAQUE_DW: 672 printf(", Opaque-Type: %s LSA (%u), Opaque-ID: %u", 673 tok2str(lsa_opaque_values, "unknown",lsrp->un_ls_stateid.opaque_field.opaque_type), 674 lsrp->un_ls_stateid.opaque_field.opaque_type, 675 EXTRACT_24BITS(&lsrp->un_ls_stateid.opaque_field.opaque_id)); 676 break; 677 default: 678 printf(", LSA-ID: %s", 679 ipaddr_string(&lsrp->un_ls_stateid.ls_stateid)); 680 break; 681 } 682 683 ++lsrp; 684 } 685 break; 686 687 case OSPF_TYPE_LS_UPDATE: 688 lsap = op->ospf_lsu.lsu_lsa; 689 TCHECK(op->ospf_lsu.lsu_count); 690 lsa_count_max = EXTRACT_32BITS(&op->ospf_lsu.lsu_count); 691 printf(", %d LSA%s",lsa_count_max, lsa_count_max > 1 ? "s" : ""); 692 for (lsa_count=1;lsa_count <= lsa_count_max;lsa_count++) { 693 printf("\n\t LSA #%u",lsa_count); 694 lsap = (const struct lsa *)ospf_print_lsa(lsap); 695 if (lsap == NULL) 696 goto trunc; 697 } 698 break; 699 700 case OSPF_TYPE_LS_ACK: 701 lshp = op->ospf_lsa.lsa_lshdr; 702 while (ospf_print_lshdr(lshp) != -1) { 703 ++lshp; 704 } 705 break; 706 707 default: 708 printf("v2 type (%d)", op->ospf_type); 709 break; 710 } 711 return (0); 712 trunc: 713 return (1); 714 } 715 716 void 717 ospf_print(register const u_char *bp, register u_int length, 718 register const u_char *bp2) 719 { 720 register const struct ospfhdr *op; 721 register const struct ip *ip; 722 register const u_char *dataend; 723 register const char *cp; 724 725 op = (struct ospfhdr *)bp; 726 ip = (struct ip *)bp2; 727 728 /* XXX Before we do anything else, strip off the MD5 trailer */ 729 TCHECK(op->ospf_authtype); 730 if (EXTRACT_16BITS(&op->ospf_authtype) == OSPF_AUTH_MD5) { 731 length -= OSPF_AUTH_MD5_LEN; 732 snapend -= OSPF_AUTH_MD5_LEN; 733 } 734 735 /* If the type is valid translate it, or just print the type */ 736 /* value. If it's not valid, say so and return */ 737 TCHECK(op->ospf_type); 738 cp = tok2str(type2str, "unknown LS-type", op->ospf_type); 739 printf("OSPFv%u, %s (%u), length: %u", 740 op->ospf_version, 741 cp, 742 op->ospf_type, 743 length); 744 if (*cp == 'u') 745 return; 746 747 if(!vflag) /* non verbose - so lets bail out here */ 748 return; 749 750 TCHECK(op->ospf_len); 751 if (length != EXTRACT_16BITS(&op->ospf_len)) { 752 printf(" [len %d]", EXTRACT_16BITS(&op->ospf_len)); 753 return; 754 } 755 dataend = bp + length; 756 757 TCHECK(op->ospf_routerid); 758 printf("\n\tRouter-ID: %s", ipaddr_string(&op->ospf_routerid)); 759 760 TCHECK(op->ospf_areaid); 761 if (op->ospf_areaid.s_addr != 0) 762 printf(", Area %s", ipaddr_string(&op->ospf_areaid)); 763 else 764 printf(", Backbone Area"); 765 766 if (vflag) { 767 /* Print authentication data (should we really do this?) */ 768 TCHECK2(op->ospf_authdata[0], sizeof(op->ospf_authdata)); 769 770 printf(", Authentication Type: %s (%u)", 771 tok2str(ospf_authtype_values,"unknown",EXTRACT_16BITS(&op->ospf_authtype)), 772 EXTRACT_16BITS(&op->ospf_authtype)); 773 774 switch (EXTRACT_16BITS(&op->ospf_authtype)) { 775 776 case OSPF_AUTH_NONE: 777 break; 778 779 case OSPF_AUTH_SIMPLE: 780 (void)fn_printn(op->ospf_authdata, 781 sizeof(op->ospf_authdata), NULL); 782 printf("\""); 783 break; 784 785 case OSPF_AUTH_MD5: 786 printf("\n\tKey-ID: %u, Auth-Length: %u, Crypto Sequence Number: 0x%08x", 787 *((op->ospf_authdata)+2), 788 *((op->ospf_authdata)+3), 789 EXTRACT_32BITS((op->ospf_authdata)+4)); 790 break; 791 792 default: 793 return; 794 } 795 } 796 /* Do rest according to version. */ 797 switch (op->ospf_version) { 798 799 case 2: 800 /* ospf version 2 */ 801 if (ospf_decode_v2(op, dataend)) 802 goto trunc; 803 break; 804 805 default: 806 printf(" ospf [version %d]", op->ospf_version); 807 break; 808 } /* end switch on version */ 809 810 return; 811 trunc: 812 fputs(tstr, stdout); 813 } 814