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 #ifndef lint 25 static const char rcsid[] _U_ = 26 "@(#) $Header: /tcpdump/master/tcpdump/print-ospf.c,v 1.56.2.4 2006/12/13 08:24:27 hannes 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 { OSPF_OPTION_DN, "Up/Down" }, 55 { 0, NULL } 56 }; 57 58 static struct tok ospf_authtype_values[] = { 59 { OSPF_AUTH_NONE, "none" }, 60 { OSPF_AUTH_SIMPLE, "simple" }, 61 { OSPF_AUTH_MD5, "MD5" }, 62 { 0, NULL } 63 }; 64 65 static struct tok ospf_rla_flag_values[] = { 66 { RLA_FLAG_B, "ABR" }, 67 { RLA_FLAG_E, "ASBR" }, 68 { RLA_FLAG_W1, "Virtual" }, 69 { RLA_FLAG_W2, "W2" }, 70 { 0, NULL } 71 }; 72 73 static struct tok type2str[] = { 74 { OSPF_TYPE_UMD, "UMD" }, 75 { OSPF_TYPE_HELLO, "Hello" }, 76 { OSPF_TYPE_DD, "Database Description" }, 77 { OSPF_TYPE_LS_REQ, "LS-Request" }, 78 { OSPF_TYPE_LS_UPDATE, "LS-Update" }, 79 { OSPF_TYPE_LS_ACK, "LS-Ack" }, 80 { 0, NULL } 81 }; 82 83 static struct tok lsa_values[] = { 84 { LS_TYPE_ROUTER, "Router" }, 85 { LS_TYPE_NETWORK, "Network" }, 86 { LS_TYPE_SUM_IP, "Summary" }, 87 { LS_TYPE_SUM_ABR, "ASBR Summary" }, 88 { LS_TYPE_ASE, "External" }, 89 { LS_TYPE_GROUP, "Multicast Group" }, 90 { LS_TYPE_NSSA, "NSSA" }, 91 { LS_TYPE_OPAQUE_LL, "Link Local Opaque" }, 92 { LS_TYPE_OPAQUE_AL, "Area Local Opaque" }, 93 { LS_TYPE_OPAQUE_DW, "Domain Wide Opaque" }, 94 { 0, NULL } 95 }; 96 97 static struct tok ospf_dd_flag_values[] = { 98 { OSPF_DB_INIT, "Init" }, 99 { OSPF_DB_MORE, "More" }, 100 { OSPF_DB_MASTER, "Master" }, 101 { 0, NULL } 102 }; 103 104 static struct tok lsa_opaque_values[] = { 105 { LS_OPAQUE_TYPE_TE, "Traffic Engineering" }, 106 { LS_OPAQUE_TYPE_GRACE, "Graceful restart" }, 107 { LS_OPAQUE_TYPE_RI, "Router Information" }, 108 { 0, NULL } 109 }; 110 111 static struct tok lsa_opaque_te_tlv_values[] = { 112 { LS_OPAQUE_TE_TLV_ROUTER, "Router Address" }, 113 { LS_OPAQUE_TE_TLV_LINK, "Link" }, 114 { 0, NULL } 115 }; 116 117 static struct tok lsa_opaque_te_link_tlv_subtlv_values[] = { 118 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE, "Link Type" }, 119 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID, "Link ID" }, 120 { LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP, "Local Interface IP address" }, 121 { LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP, "Remote Interface IP address" }, 122 { LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC, "Traffic Engineering Metric" }, 123 { LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW, "Maximum Bandwidth" }, 124 { LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW, "Maximum Reservable Bandwidth" }, 125 { LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW, "Unreserved Bandwidth" }, 126 { LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP, "Administrative Group" }, 127 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" }, 128 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE, "Link Protection Type" }, 129 { LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR, "Interface Switching Capability" }, 130 { LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP, "Shared Risk Link Group" }, 131 { LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS, "Bandwidth Constraints" }, 132 { 0, NULL } 133 }; 134 135 static struct tok lsa_opaque_grace_tlv_values[] = { 136 { LS_OPAQUE_GRACE_TLV_PERIOD, "Grace Period" }, 137 { LS_OPAQUE_GRACE_TLV_REASON, "Graceful restart Reason" }, 138 { LS_OPAQUE_GRACE_TLV_INT_ADDRESS, "IPv4 interface address" }, 139 { 0, NULL } 140 }; 141 142 static struct tok lsa_opaque_grace_tlv_reason_values[] = { 143 { LS_OPAQUE_GRACE_TLV_REASON_UNKNOWN, "Unknown" }, 144 { LS_OPAQUE_GRACE_TLV_REASON_SW_RESTART, "Software Restart" }, 145 { LS_OPAQUE_GRACE_TLV_REASON_SW_UPGRADE, "Software Reload/Upgrade" }, 146 { LS_OPAQUE_GRACE_TLV_REASON_CP_SWITCH, "Control Processor Switch" }, 147 { 0, NULL } 148 }; 149 150 static struct tok lsa_opaque_te_tlv_link_type_sub_tlv_values[] = { 151 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_PTP, "Point-to-point" }, 152 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_MA, "Multi-Access" }, 153 { 0, NULL } 154 }; 155 156 static struct tok lsa_opaque_ri_tlv_values[] = { 157 { LS_OPAQUE_RI_TLV_CAP, "Router Capabilities" }, 158 { 0, NULL } 159 }; 160 161 static struct tok lsa_opaque_ri_tlv_cap_values[] = { 162 { 1, "Reserved" }, 163 { 2, "Reserved" }, 164 { 4, "Reserved" }, 165 { 8, "Reserved" }, 166 { 16, "graceful restart capable" }, 167 { 32, "graceful restart helper" }, 168 { 64, "Stub router support" }, 169 { 128, "Traffic engineering" }, 170 { 256, "p2p over LAN" }, 171 { 512, "path computation server" }, 172 { 0, NULL } 173 }; 174 175 static char tstr[] = " [|ospf]"; 176 177 #ifdef WIN32 178 #define inline __inline 179 #endif /* WIN32 */ 180 181 static int ospf_print_lshdr(const struct lsa_hdr *); 182 static const u_char *ospf_print_lsa(const struct lsa *); 183 static int ospf_decode_v2(const struct ospfhdr *, const u_char *); 184 185 static int 186 ospf_print_lshdr(register const struct lsa_hdr *lshp) 187 { 188 u_int ls_length; 189 190 TCHECK(lshp->ls_length); 191 ls_length = EXTRACT_16BITS(&lshp->ls_length); 192 if (ls_length < sizeof(struct lsa_hdr)) { 193 printf("\n\t Bogus length %u < %lu", ls_length, 194 (unsigned long)sizeof(struct lsa_hdr)); 195 return(-1); 196 } 197 198 TCHECK(lshp->ls_seq); /* XXX - ls_length check checked this */ 199 printf("\n\t Advertising Router: %s, seq 0x%08x, age %us, length: %u", 200 ipaddr_string(&lshp->ls_router), 201 EXTRACT_32BITS(&lshp->ls_seq), 202 EXTRACT_16BITS(&lshp->ls_age), 203 ls_length-(u_int)sizeof(struct lsa_hdr)); 204 205 TCHECK(lshp->ls_type); /* XXX - ls_length check checked this */ 206 switch (lshp->ls_type) { 207 /* the LSA header for opaque LSAs was slightly changed */ 208 case LS_TYPE_OPAQUE_LL: 209 case LS_TYPE_OPAQUE_AL: 210 case LS_TYPE_OPAQUE_DW: 211 printf("\n\t %s LSA (%d), Opaque-Type: %s LSA (%u), Opaque-ID: %u", 212 tok2str(lsa_values,"unknown",lshp->ls_type), 213 lshp->ls_type, 214 215 tok2str(lsa_opaque_values, 216 "unknown", 217 *(&lshp->un_lsa_id.opaque_field.opaque_type)), 218 *(&lshp->un_lsa_id.opaque_field.opaque_type), 219 EXTRACT_24BITS(&lshp->un_lsa_id.opaque_field.opaque_id) 220 221 ); 222 break; 223 224 /* all other LSA types use regular style LSA headers */ 225 default: 226 printf("\n\t %s LSA (%d), LSA-ID: %s", 227 tok2str(lsa_values,"unknown",lshp->ls_type), 228 lshp->ls_type, 229 ipaddr_string(&lshp->un_lsa_id.lsa_id)); 230 break; 231 } 232 233 TCHECK(lshp->ls_options); /* XXX - ls_length check checked this */ 234 printf("\n\t Options: [%s]", bittok2str(ospf_option_values,"none",lshp->ls_options)); 235 236 return (ls_length); 237 trunc: 238 return (-1); 239 } 240 241 /* 242 * Print a single link state advertisement. If truncated or if LSA length 243 * field is less than the length of the LSA header, return NULl, else 244 * return pointer to data past end of LSA. 245 */ 246 static const u_int8_t * 247 ospf_print_lsa(register const struct lsa *lsap) 248 { 249 register const u_int8_t *ls_end; 250 register const struct rlalink *rlp; 251 register const struct tos_metric *tosp; 252 register const struct in_addr *ap; 253 register const struct aslametric *almp; 254 register const struct mcla *mcp; 255 register const u_int32_t *lp; 256 register int j, k, tlv_type, tlv_length, subtlv_type, subtlv_length, priority_level, te_class; 257 register int ls_length; 258 const u_int8_t *tptr; 259 int count_srlg; 260 union { /* int to float conversion buffer for several subTLVs */ 261 float f; 262 u_int32_t i; 263 } bw; 264 265 tptr = (u_int8_t *)lsap->lsa_un.un_unknown; /* squelch compiler warnings */ 266 ls_length = ospf_print_lshdr(&lsap->ls_hdr); 267 if (ls_length == -1) 268 return(NULL); 269 ls_end = (u_int8_t *)lsap + ls_length; 270 ls_length -= sizeof(struct lsa_hdr); 271 272 switch (lsap->ls_hdr.ls_type) { 273 274 case LS_TYPE_ROUTER: 275 TCHECK(lsap->lsa_un.un_rla.rla_flags); 276 printf("\n\t Router LSA Options: [%s]", bittok2str(ospf_rla_flag_values,"none",lsap->lsa_un.un_rla.rla_flags)); 277 278 TCHECK(lsap->lsa_un.un_rla.rla_count); 279 j = EXTRACT_16BITS(&lsap->lsa_un.un_rla.rla_count); 280 TCHECK(lsap->lsa_un.un_rla.rla_link); 281 rlp = lsap->lsa_un.un_rla.rla_link; 282 while (j--) { 283 TCHECK(*rlp); 284 switch (rlp->link_type) { 285 286 case RLA_TYPE_VIRTUAL: 287 printf("\n\t Virtual Link: Neighbor Router-ID: %s, Interface Address: %s", 288 ipaddr_string(&rlp->link_id), 289 ipaddr_string(&rlp->link_data)); 290 break; 291 292 case RLA_TYPE_ROUTER: 293 printf("\n\t Neighbor Router-ID: %s, Interface Address: %s", 294 ipaddr_string(&rlp->link_id), 295 ipaddr_string(&rlp->link_data)); 296 break; 297 298 case RLA_TYPE_TRANSIT: 299 printf("\n\t Neighbor Network-ID: %s, Interface Address: %s", 300 ipaddr_string(&rlp->link_id), 301 ipaddr_string(&rlp->link_data)); 302 break; 303 304 case RLA_TYPE_STUB: 305 printf("\n\t Stub Network: %s, Mask: %s", 306 ipaddr_string(&rlp->link_id), 307 ipaddr_string(&rlp->link_data)); 308 break; 309 310 default: 311 printf("\n\t Unknown Router Link Type (%u)", 312 rlp->link_type); 313 return (ls_end); 314 } 315 printf(", tos 0, metric: %d", EXTRACT_16BITS(&rlp->link_tos0metric)); 316 tosp = (struct tos_metric *) 317 ((sizeof rlp->link_tos0metric) + (u_char *) rlp); 318 for (k = 0; k < (int) rlp->link_toscount; ++k, ++tosp) { 319 TCHECK(*tosp); 320 printf(", tos %d, metric: %d", 321 tosp->tos_type, 322 EXTRACT_16BITS(&tosp->tos_metric)); 323 } 324 rlp = (struct rlalink *)((u_char *)(rlp + 1) + 325 ((rlp->link_toscount) * sizeof(*tosp))); 326 } 327 break; 328 329 case LS_TYPE_NETWORK: 330 TCHECK(lsap->lsa_un.un_nla.nla_mask); 331 printf("\n\t Mask %s\n\t Connected Routers:", 332 ipaddr_string(&lsap->lsa_un.un_nla.nla_mask)); 333 ap = lsap->lsa_un.un_nla.nla_router; 334 while ((u_char *)ap < ls_end) { 335 TCHECK(*ap); 336 printf("\n\t %s", ipaddr_string(ap)); 337 ++ap; 338 } 339 break; 340 341 case LS_TYPE_SUM_IP: 342 TCHECK(lsap->lsa_un.un_nla.nla_mask); 343 printf("\n\t Mask %s", 344 ipaddr_string(&lsap->lsa_un.un_sla.sla_mask)); 345 TCHECK(lsap->lsa_un.un_sla.sla_tosmetric); 346 lp = lsap->lsa_un.un_sla.sla_tosmetric; 347 /* suppress tos if its not supported */ 348 if(!((lsap->ls_hdr.ls_options)&OSPF_OPTION_T)) { 349 printf(", metric: %u", EXTRACT_32BITS(lp)&SLA_MASK_METRIC); 350 break; 351 } 352 while ((u_char *)lp < ls_end) { 353 register u_int32_t ul; 354 355 TCHECK(*lp); 356 ul = EXTRACT_32BITS(lp); 357 printf(", tos %d metric %d", 358 (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS, 359 ul & SLA_MASK_METRIC); 360 ++lp; 361 } 362 break; 363 364 case LS_TYPE_SUM_ABR: 365 TCHECK(lsap->lsa_un.un_sla.sla_tosmetric); 366 lp = lsap->lsa_un.un_sla.sla_tosmetric; 367 /* suppress tos if its not supported */ 368 if(!((lsap->ls_hdr.ls_options)&OSPF_OPTION_T)) { 369 printf(", metric: %u", EXTRACT_32BITS(lp)&SLA_MASK_METRIC); 370 break; 371 } 372 while ((u_char *)lp < ls_end) { 373 register u_int32_t ul; 374 375 TCHECK(*lp); 376 ul = EXTRACT_32BITS(lp); 377 printf(", tos %d metric %d", 378 (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS, 379 ul & SLA_MASK_METRIC); 380 ++lp; 381 } 382 break; 383 384 case LS_TYPE_ASE: 385 case LS_TYPE_NSSA: /* fall through - those LSAs share the same format */ 386 TCHECK(lsap->lsa_un.un_nla.nla_mask); 387 printf("\n\t Mask %s", 388 ipaddr_string(&lsap->lsa_un.un_asla.asla_mask)); 389 390 TCHECK(lsap->lsa_un.un_sla.sla_tosmetric); 391 almp = lsap->lsa_un.un_asla.asla_metric; 392 while ((u_char *)almp < ls_end) { 393 register u_int32_t ul; 394 395 TCHECK(almp->asla_tosmetric); 396 ul = EXTRACT_32BITS(&almp->asla_tosmetric); 397 printf(", type %d, tos %d metric:", 398 (ul & ASLA_FLAG_EXTERNAL) ? 2 : 1, 399 (ul & ASLA_MASK_TOS) >> ASLA_SHIFT_TOS); 400 if ((ul & ASLA_MASK_METRIC)==0xffffff) 401 printf(" infinite"); 402 else 403 printf(" %d", (ul & ASLA_MASK_METRIC)); 404 405 TCHECK(almp->asla_forward); 406 if (almp->asla_forward.s_addr) { 407 printf(", forward %s", 408 ipaddr_string(&almp->asla_forward)); 409 } 410 TCHECK(almp->asla_tag); 411 if (almp->asla_tag.s_addr) { 412 printf(", tag %s", 413 ipaddr_string(&almp->asla_tag)); 414 } 415 ++almp; 416 } 417 break; 418 419 case LS_TYPE_GROUP: 420 /* Multicast extensions as of 23 July 1991 */ 421 mcp = lsap->lsa_un.un_mcla; 422 while ((u_char *)mcp < ls_end) { 423 TCHECK(mcp->mcla_vid); 424 switch (EXTRACT_32BITS(&mcp->mcla_vtype)) { 425 426 case MCLA_VERTEX_ROUTER: 427 printf("\n\t Router Router-ID %s", 428 ipaddr_string(&mcp->mcla_vid)); 429 break; 430 431 case MCLA_VERTEX_NETWORK: 432 printf("\n\t Network Designated Router %s", 433 ipaddr_string(&mcp->mcla_vid)); 434 break; 435 436 default: 437 printf("\n\t unknown VertexType (%u)", 438 EXTRACT_32BITS(&mcp->mcla_vtype)); 439 break; 440 } 441 ++mcp; 442 } 443 break; 444 445 case LS_TYPE_OPAQUE_LL: /* fall through */ 446 case LS_TYPE_OPAQUE_AL: 447 case LS_TYPE_OPAQUE_DW: 448 449 switch (*(&lsap->ls_hdr.un_lsa_id.opaque_field.opaque_type)) { 450 case LS_OPAQUE_TYPE_RI: 451 tptr = (u_int8_t *)(&lsap->lsa_un.un_ri_tlv.type); 452 453 while (ls_length != 0) { 454 TCHECK2(*tptr, 4); 455 if (ls_length < 4) { 456 printf("\n\t Remaining LS length %u < 4", ls_length); 457 return(ls_end); 458 } 459 tlv_type = EXTRACT_16BITS(tptr); 460 tlv_length = EXTRACT_16BITS(tptr+2); 461 tptr+=4; 462 ls_length-=4; 463 464 printf("\n\t %s TLV (%u), length: %u, value: ", 465 tok2str(lsa_opaque_ri_tlv_values,"unknown",tlv_type), 466 tlv_type, 467 tlv_length); 468 469 if (tlv_length > ls_length) { 470 printf("\n\t Bogus length %u > %u", tlv_length, 471 ls_length); 472 return(ls_end); 473 } 474 ls_length-=tlv_length; 475 TCHECK2(*tptr, tlv_length); 476 switch(tlv_type) { 477 478 case LS_OPAQUE_RI_TLV_CAP: 479 if (tlv_length != 4) { 480 printf("\n\t Bogus length %u != 4", tlv_length); 481 return(ls_end); 482 } 483 printf("Capabilities: %s", 484 bittok2str(lsa_opaque_ri_tlv_cap_values, "Unknown", EXTRACT_32BITS(tptr))); 485 break; 486 default: 487 if (vflag <= 1) { 488 if(!print_unknown_data(tptr,"\n\t ",tlv_length)) 489 return(ls_end); 490 } 491 break; 492 493 } 494 tptr+=tlv_length; 495 } 496 497 break; 498 case LS_OPAQUE_TYPE_GRACE: 499 tptr = (u_int8_t *)(&lsap->lsa_un.un_grace_tlv.type); 500 501 while (ls_length != 0) { 502 TCHECK2(*tptr, 4); 503 if (ls_length < 4) { 504 printf("\n\t Remaining LS length %u < 4", ls_length); 505 return(ls_end); 506 } 507 tlv_type = EXTRACT_16BITS(tptr); 508 tlv_length = EXTRACT_16BITS(tptr+2); 509 tptr+=4; 510 ls_length-=4; 511 512 printf("\n\t %s TLV (%u), length: %u, value: ", 513 tok2str(lsa_opaque_grace_tlv_values,"unknown",tlv_type), 514 tlv_type, 515 tlv_length); 516 517 if (tlv_length > ls_length) { 518 printf("\n\t Bogus length %u > %u", tlv_length, 519 ls_length); 520 return(ls_end); 521 } 522 ls_length-=tlv_length; 523 TCHECK2(*tptr, tlv_length); 524 switch(tlv_type) { 525 526 case LS_OPAQUE_GRACE_TLV_PERIOD: 527 if (tlv_length != 4) { 528 printf("\n\t Bogus length %u != 4", tlv_length); 529 return(ls_end); 530 } 531 printf("%us",EXTRACT_32BITS(tptr)); 532 break; 533 case LS_OPAQUE_GRACE_TLV_REASON: 534 if (tlv_length != 1) { 535 printf("\n\t Bogus length %u != 1", tlv_length); 536 return(ls_end); 537 } 538 printf("%s (%u)", 539 tok2str(lsa_opaque_grace_tlv_reason_values, "Unknown", *tptr), 540 *tptr); 541 break; 542 case LS_OPAQUE_GRACE_TLV_INT_ADDRESS: 543 if (tlv_length != 4) { 544 printf("\n\t Bogus length %u != 4", tlv_length); 545 return(ls_end); 546 } 547 printf("%s", ipaddr_string(tptr)); 548 break; 549 default: 550 if (vflag <= 1) { 551 if(!print_unknown_data(tptr,"\n\t ",tlv_length)) 552 return(ls_end); 553 } 554 break; 555 556 } 557 tptr+=tlv_length; 558 } 559 560 break; 561 case LS_OPAQUE_TYPE_TE: 562 tptr = (u_int8_t *)(&lsap->lsa_un.un_te_lsa_tlv.type); 563 564 while (ls_length != 0) { 565 TCHECK2(*tptr, 4); 566 if (ls_length < 4) { 567 printf("\n\t Remaining LS length %u < 4", ls_length); 568 return(ls_end); 569 } 570 tlv_type = EXTRACT_16BITS(tptr); 571 tlv_length = EXTRACT_16BITS(tptr+2); 572 tptr+=4; 573 ls_length-=4; 574 575 printf("\n\t %s TLV (%u), length: %u", 576 tok2str(lsa_opaque_te_tlv_values,"unknown",tlv_type), 577 tlv_type, 578 tlv_length); 579 580 if (tlv_length > ls_length) { 581 printf("\n\t Bogus length %u > %u", tlv_length, 582 ls_length); 583 return(ls_end); 584 } 585 ls_length-=tlv_length; 586 switch(tlv_type) { 587 case LS_OPAQUE_TE_TLV_LINK: 588 while (tlv_length != 0) { 589 if (tlv_length < 4) { 590 printf("\n\t Remaining TLV length %u < 4", 591 tlv_length); 592 return(ls_end); 593 } 594 TCHECK2(*tptr, 4); 595 subtlv_type = EXTRACT_16BITS(tptr); 596 subtlv_length = EXTRACT_16BITS(tptr+2); 597 tptr+=4; 598 tlv_length-=4; 599 600 printf("\n\t %s subTLV (%u), length: %u", 601 tok2str(lsa_opaque_te_link_tlv_subtlv_values,"unknown",subtlv_type), 602 subtlv_type, 603 subtlv_length); 604 605 TCHECK2(*tptr, subtlv_length); 606 switch(subtlv_type) { 607 case LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP: 608 printf(", 0x%08x", EXTRACT_32BITS(tptr)); 609 break; 610 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID: 611 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID: 612 printf(", %s (0x%08x)", 613 ipaddr_string(tptr), 614 EXTRACT_32BITS(tptr)); 615 if (subtlv_length == 8) /* draft-ietf-ccamp-ospf-gmpls-extensions */ 616 printf(", %s (0x%08x)", 617 ipaddr_string(tptr+4), 618 EXTRACT_32BITS(tptr+4)); 619 break; 620 case LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP: 621 case LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP: 622 printf(", %s", ipaddr_string(tptr)); 623 break; 624 case LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW: 625 case LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW: 626 bw.i = EXTRACT_32BITS(tptr); 627 printf(", %.3f Mbps", bw.f*8/1000000 ); 628 break; 629 case LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW: 630 for (te_class = 0; te_class < 8; te_class++) { 631 bw.i = EXTRACT_32BITS(tptr+te_class*4); 632 printf("\n\t\tTE-Class %u: %.3f Mbps", 633 te_class, 634 bw.f*8/1000000 ); 635 } 636 break; 637 case LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS: 638 printf("\n\t\tBandwidth Constraints Model ID: %s (%u)", 639 tok2str(diffserv_te_bc_values, "unknown", *tptr), 640 *tptr); 641 /* decode BCs until the subTLV ends */ 642 for (te_class = 0; te_class < (subtlv_length-4)/4; te_class++) { 643 bw.i = EXTRACT_32BITS(tptr+4+te_class*4); 644 printf("\n\t\t Bandwidth constraint CT%u: %.3f Mbps", 645 te_class, 646 bw.f*8/1000000 ); 647 } 648 break; 649 case LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC: 650 printf(", Metric %u", EXTRACT_32BITS(tptr)); 651 break; 652 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE: 653 printf(", %s, Priority %u", 654 bittok2str(gmpls_link_prot_values, "none", *tptr), 655 *(tptr+1)); 656 break; 657 case LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR: 658 printf("\n\t\tInterface Switching Capability: %s", 659 tok2str(gmpls_switch_cap_values, "Unknown", *(tptr))); 660 printf("\n\t\tLSP Encoding: %s\n\t\tMax LSP Bandwidth:", 661 tok2str(gmpls_encoding_values, "Unknown", *(tptr+1))); 662 for (priority_level = 0; priority_level < 8; priority_level++) { 663 bw.i = EXTRACT_32BITS(tptr+4+(priority_level*4)); 664 printf("\n\t\t priority level %d: %.3f Mbps", 665 priority_level, 666 bw.f*8/1000000 ); 667 } 668 break; 669 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE: 670 printf(", %s (%u)", 671 tok2str(lsa_opaque_te_tlv_link_type_sub_tlv_values,"unknown",*tptr), 672 *tptr); 673 break; 674 675 case LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP: 676 count_srlg = subtlv_length / 4; 677 if (count_srlg != 0) 678 printf("\n\t\t Shared risk group: "); 679 while (count_srlg > 0) { 680 bw.i = EXTRACT_32BITS(tptr); 681 printf("%d",bw.i); 682 tptr+=4; 683 count_srlg--; 684 if (count_srlg > 0) 685 printf(", "); 686 } 687 break; 688 689 default: 690 if (vflag <= 1) { 691 if(!print_unknown_data(tptr,"\n\t\t",subtlv_length)) 692 return(ls_end); 693 } 694 break; 695 } 696 /* in OSPF everything has to be 32-bit aligned, including TLVs */ 697 if (subtlv_length%4 != 0) 698 subtlv_length+=4-(subtlv_length%4); 699 700 tlv_length-=subtlv_length; 701 tptr+=subtlv_length; 702 703 } 704 break; 705 706 case LS_OPAQUE_TE_TLV_ROUTER: 707 if (tlv_length < 4) { 708 printf("\n\t TLV length %u < 4", tlv_length); 709 return(ls_end); 710 } 711 TCHECK2(*tptr, 4); 712 printf(", %s", ipaddr_string(tptr)); 713 break; 714 715 default: 716 if (vflag <= 1) { 717 if(!print_unknown_data(tptr,"\n\t ",tlv_length)) 718 return(ls_end); 719 } 720 break; 721 } 722 tptr+=tlv_length; 723 } 724 break; 725 } 726 break; 727 default: 728 if (vflag <= 1) { 729 if(!print_unknown_data((u_int8_t *)lsap->lsa_un.un_unknown, 730 "\n\t ", ls_length)) 731 return(ls_end); 732 } 733 break; 734 } 735 736 /* do we want to see an additionally hexdump ? */ 737 if (vflag> 1) 738 if(!print_unknown_data((u_int8_t *)lsap->lsa_un.un_unknown, 739 "\n\t ", ls_length)) { 740 return(ls_end); 741 } 742 743 return (ls_end); 744 trunc: 745 return (NULL); 746 } 747 748 static int 749 ospf_decode_v2(register const struct ospfhdr *op, 750 register const u_char *dataend) 751 { 752 register const struct in_addr *ap; 753 register const struct lsr *lsrp; 754 register const struct lsa_hdr *lshp; 755 register const struct lsa *lsap; 756 register u_int32_t lsa_count,lsa_count_max; 757 758 switch (op->ospf_type) { 759 760 case OSPF_TYPE_UMD: 761 /* 762 * Rob Coltun's special monitoring packets; 763 * do nothing 764 */ 765 break; 766 767 case OSPF_TYPE_HELLO: 768 printf("\n\tOptions: [%s]", 769 bittok2str(ospf_option_values,"none",op->ospf_hello.hello_options)); 770 771 TCHECK(op->ospf_hello.hello_deadint); 772 printf("\n\t Hello Timer: %us, Dead Timer %us, Mask: %s, Priority: %u", 773 EXTRACT_16BITS(&op->ospf_hello.hello_helloint), 774 EXTRACT_32BITS(&op->ospf_hello.hello_deadint), 775 ipaddr_string(&op->ospf_hello.hello_mask), 776 op->ospf_hello.hello_priority); 777 778 TCHECK(op->ospf_hello.hello_dr); 779 if (op->ospf_hello.hello_dr.s_addr != 0) 780 printf("\n\t Designated Router %s", 781 ipaddr_string(&op->ospf_hello.hello_dr)); 782 783 TCHECK(op->ospf_hello.hello_bdr); 784 if (op->ospf_hello.hello_bdr.s_addr != 0) 785 printf(", Backup Designated Router %s", 786 ipaddr_string(&op->ospf_hello.hello_bdr)); 787 788 ap = op->ospf_hello.hello_neighbor; 789 if ((u_char *)ap < dataend) 790 printf("\n\t Neighbor List:"); 791 while ((u_char *)ap < dataend) { 792 TCHECK(*ap); 793 printf("\n\t %s", ipaddr_string(ap)); 794 ++ap; 795 } 796 break; /* HELLO */ 797 798 case OSPF_TYPE_DD: 799 TCHECK(op->ospf_db.db_options); 800 printf("\n\tOptions: [%s]", 801 bittok2str(ospf_option_values,"none",op->ospf_db.db_options)); 802 TCHECK(op->ospf_db.db_flags); 803 printf(", DD Flags: [%s]", 804 bittok2str(ospf_dd_flag_values,"none",op->ospf_db.db_flags)); 805 806 if (vflag) { 807 /* Print all the LS adv's */ 808 lshp = op->ospf_db.db_lshdr; 809 while (ospf_print_lshdr(lshp) != -1) { 810 ++lshp; 811 } 812 } 813 break; 814 815 case OSPF_TYPE_LS_REQ: 816 lsrp = op->ospf_lsr; 817 while ((u_char *)lsrp < dataend) { 818 TCHECK(*lsrp); 819 820 printf("\n\t Advertising Router: %s, %s LSA (%u)", 821 ipaddr_string(&lsrp->ls_router), 822 tok2str(lsa_values,"unknown",EXTRACT_32BITS(lsrp->ls_type)), 823 EXTRACT_32BITS(&lsrp->ls_type)); 824 825 switch (EXTRACT_32BITS(lsrp->ls_type)) { 826 /* the LSA header for opaque LSAs was slightly changed */ 827 case LS_TYPE_OPAQUE_LL: 828 case LS_TYPE_OPAQUE_AL: 829 case LS_TYPE_OPAQUE_DW: 830 printf(", Opaque-Type: %s LSA (%u), Opaque-ID: %u", 831 tok2str(lsa_opaque_values, "unknown",lsrp->un_ls_stateid.opaque_field.opaque_type), 832 lsrp->un_ls_stateid.opaque_field.opaque_type, 833 EXTRACT_24BITS(&lsrp->un_ls_stateid.opaque_field.opaque_id)); 834 break; 835 default: 836 printf(", LSA-ID: %s", 837 ipaddr_string(&lsrp->un_ls_stateid.ls_stateid)); 838 break; 839 } 840 841 ++lsrp; 842 } 843 break; 844 845 case OSPF_TYPE_LS_UPDATE: 846 lsap = op->ospf_lsu.lsu_lsa; 847 TCHECK(op->ospf_lsu.lsu_count); 848 lsa_count_max = EXTRACT_32BITS(&op->ospf_lsu.lsu_count); 849 printf(", %d LSA%s",lsa_count_max, lsa_count_max > 1 ? "s" : ""); 850 for (lsa_count=1;lsa_count <= lsa_count_max;lsa_count++) { 851 printf("\n\t LSA #%u",lsa_count); 852 lsap = (const struct lsa *)ospf_print_lsa(lsap); 853 if (lsap == NULL) 854 goto trunc; 855 } 856 break; 857 858 case OSPF_TYPE_LS_ACK: 859 lshp = op->ospf_lsa.lsa_lshdr; 860 while (ospf_print_lshdr(lshp) != -1) { 861 ++lshp; 862 } 863 break; 864 865 default: 866 printf("v2 type (%d)", op->ospf_type); 867 break; 868 } 869 return (0); 870 trunc: 871 return (1); 872 } 873 874 void 875 ospf_print(register const u_char *bp, register u_int length, 876 const u_char *bp2 _U_) 877 { 878 register const struct ospfhdr *op; 879 register const u_char *dataend; 880 register const char *cp; 881 882 op = (struct ospfhdr *)bp; 883 884 /* XXX Before we do anything else, strip off the MD5 trailer */ 885 TCHECK(op->ospf_authtype); 886 if (EXTRACT_16BITS(&op->ospf_authtype) == OSPF_AUTH_MD5) { 887 length -= OSPF_AUTH_MD5_LEN; 888 snapend -= OSPF_AUTH_MD5_LEN; 889 } 890 891 /* If the type is valid translate it, or just print the type */ 892 /* value. If it's not valid, say so and return */ 893 TCHECK(op->ospf_type); 894 cp = tok2str(type2str, "unknown LS-type", op->ospf_type); 895 printf("OSPFv%u, %s, length: %u", 896 op->ospf_version, 897 cp, 898 length); 899 if (*cp == 'u') 900 return; 901 902 if(!vflag) /* non verbose - so lets bail out here */ 903 return; 904 905 TCHECK(op->ospf_len); 906 if (length != EXTRACT_16BITS(&op->ospf_len)) { 907 printf(" [len %d]", EXTRACT_16BITS(&op->ospf_len)); 908 return; 909 } 910 dataend = bp + length; 911 912 TCHECK(op->ospf_routerid); 913 printf("\n\tRouter-ID: %s", ipaddr_string(&op->ospf_routerid)); 914 915 TCHECK(op->ospf_areaid); 916 if (op->ospf_areaid.s_addr != 0) 917 printf(", Area %s", ipaddr_string(&op->ospf_areaid)); 918 else 919 printf(", Backbone Area"); 920 921 if (vflag) { 922 /* Print authentication data (should we really do this?) */ 923 TCHECK2(op->ospf_authdata[0], sizeof(op->ospf_authdata)); 924 925 printf(", Authentication Type: %s (%u)", 926 tok2str(ospf_authtype_values,"unknown",EXTRACT_16BITS(&op->ospf_authtype)), 927 EXTRACT_16BITS(&op->ospf_authtype)); 928 929 switch (EXTRACT_16BITS(&op->ospf_authtype)) { 930 931 case OSPF_AUTH_NONE: 932 break; 933 934 case OSPF_AUTH_SIMPLE: 935 printf("\n\tSimple text password: "); 936 safeputs(op->ospf_authdata, OSPF_AUTH_SIMPLE_LEN); 937 break; 938 939 case OSPF_AUTH_MD5: 940 printf("\n\tKey-ID: %u, Auth-Length: %u, Crypto Sequence Number: 0x%08x", 941 *((op->ospf_authdata)+2), 942 *((op->ospf_authdata)+3), 943 EXTRACT_32BITS((op->ospf_authdata)+4)); 944 break; 945 946 default: 947 return; 948 } 949 } 950 /* Do rest according to version. */ 951 switch (op->ospf_version) { 952 953 case 2: 954 /* ospf version 2 */ 955 if (ospf_decode_v2(op, dataend)) 956 goto trunc; 957 break; 958 959 default: 960 printf(" ospf [version %d]", op->ospf_version); 961 break; 962 } /* end switch on version */ 963 964 return; 965 trunc: 966 fputs(tstr, stdout); 967 } 968
