print-ospf.c revision 1.4
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-ospf.c,v 1.66 2007-10-08 07:53:21 hannes Exp (LBL)"; 29 #else 30 __RCSID("$NetBSD: print-ospf.c,v 1.4 2013/12/31 17:33:31 christos 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 42 #include "interface.h" 43 #include "addrtoname.h" 44 #include "extract.h" 45 #include "gmpls.h" 46 47 #include "ospf.h" 48 49 #include "ip.h" 50 51 static const struct tok ospf_option_values[] = { 52 { OSPF_OPTION_T, "MultiTopology" }, /* draft-ietf-ospf-mt-09 */ 53 { OSPF_OPTION_E, "External" }, 54 { OSPF_OPTION_MC, "Multicast" }, 55 { OSPF_OPTION_NP, "NSSA" }, 56 { OSPF_OPTION_L, "LLS" }, 57 { OSPF_OPTION_DC, "Demand Circuit" }, 58 { OSPF_OPTION_O, "Opaque" }, 59 { OSPF_OPTION_DN, "Up/Down" }, 60 { 0, NULL } 61 }; 62 63 static const struct tok ospf_authtype_values[] = { 64 { OSPF_AUTH_NONE, "none" }, 65 { OSPF_AUTH_SIMPLE, "simple" }, 66 { OSPF_AUTH_MD5, "MD5" }, 67 { 0, NULL } 68 }; 69 70 static const struct tok ospf_rla_flag_values[] = { 71 { RLA_FLAG_B, "ABR" }, 72 { RLA_FLAG_E, "ASBR" }, 73 { RLA_FLAG_W1, "Virtual" }, 74 { RLA_FLAG_W2, "W2" }, 75 { 0, NULL } 76 }; 77 78 static const struct tok type2str[] = { 79 { OSPF_TYPE_UMD, "UMD" }, 80 { OSPF_TYPE_HELLO, "Hello" }, 81 { OSPF_TYPE_DD, "Database Description" }, 82 { OSPF_TYPE_LS_REQ, "LS-Request" }, 83 { OSPF_TYPE_LS_UPDATE, "LS-Update" }, 84 { OSPF_TYPE_LS_ACK, "LS-Ack" }, 85 { 0, NULL } 86 }; 87 88 static const struct tok lsa_values[] = { 89 { LS_TYPE_ROUTER, "Router" }, 90 { LS_TYPE_NETWORK, "Network" }, 91 { LS_TYPE_SUM_IP, "Summary" }, 92 { LS_TYPE_SUM_ABR, "ASBR Summary" }, 93 { LS_TYPE_ASE, "External" }, 94 { LS_TYPE_GROUP, "Multicast Group" }, 95 { LS_TYPE_NSSA, "NSSA" }, 96 { LS_TYPE_OPAQUE_LL, "Link Local Opaque" }, 97 { LS_TYPE_OPAQUE_AL, "Area Local Opaque" }, 98 { LS_TYPE_OPAQUE_DW, "Domain Wide Opaque" }, 99 { 0, NULL } 100 }; 101 102 static const struct tok ospf_dd_flag_values[] = { 103 { OSPF_DB_INIT, "Init" }, 104 { OSPF_DB_MORE, "More" }, 105 { OSPF_DB_MASTER, "Master" }, 106 { OSPF_DB_RESYNC, "OOBResync" }, 107 { 0, NULL } 108 }; 109 110 static const struct tok lsa_opaque_values[] = { 111 { LS_OPAQUE_TYPE_TE, "Traffic Engineering" }, 112 { LS_OPAQUE_TYPE_GRACE, "Graceful restart" }, 113 { LS_OPAQUE_TYPE_RI, "Router Information" }, 114 { 0, NULL } 115 }; 116 117 static const struct tok lsa_opaque_te_tlv_values[] = { 118 { LS_OPAQUE_TE_TLV_ROUTER, "Router Address" }, 119 { LS_OPAQUE_TE_TLV_LINK, "Link" }, 120 { 0, NULL } 121 }; 122 123 static const struct tok lsa_opaque_te_link_tlv_subtlv_values[] = { 124 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE, "Link Type" }, 125 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID, "Link ID" }, 126 { LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP, "Local Interface IP address" }, 127 { LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP, "Remote Interface IP address" }, 128 { LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC, "Traffic Engineering Metric" }, 129 { LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW, "Maximum Bandwidth" }, 130 { LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW, "Maximum Reservable Bandwidth" }, 131 { LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW, "Unreserved Bandwidth" }, 132 { LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP, "Administrative Group" }, 133 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" }, 134 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE, "Link Protection Type" }, 135 { LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR, "Interface Switching Capability" }, 136 { LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP, "Shared Risk Link Group" }, 137 { LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS, "Bandwidth Constraints" }, 138 { 0, NULL } 139 }; 140 141 static const struct tok lsa_opaque_grace_tlv_values[] = { 142 { LS_OPAQUE_GRACE_TLV_PERIOD, "Grace Period" }, 143 { LS_OPAQUE_GRACE_TLV_REASON, "Graceful restart Reason" }, 144 { LS_OPAQUE_GRACE_TLV_INT_ADDRESS, "IPv4 interface address" }, 145 { 0, NULL } 146 }; 147 148 static const struct tok lsa_opaque_grace_tlv_reason_values[] = { 149 { LS_OPAQUE_GRACE_TLV_REASON_UNKNOWN, "Unknown" }, 150 { LS_OPAQUE_GRACE_TLV_REASON_SW_RESTART, "Software Restart" }, 151 { LS_OPAQUE_GRACE_TLV_REASON_SW_UPGRADE, "Software Reload/Upgrade" }, 152 { LS_OPAQUE_GRACE_TLV_REASON_CP_SWITCH, "Control Processor Switch" }, 153 { 0, NULL } 154 }; 155 156 static const struct tok lsa_opaque_te_tlv_link_type_sub_tlv_values[] = { 157 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_PTP, "Point-to-point" }, 158 { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_MA, "Multi-Access" }, 159 { 0, NULL } 160 }; 161 162 static const struct tok lsa_opaque_ri_tlv_values[] = { 163 { LS_OPAQUE_RI_TLV_CAP, "Router Capabilities" }, 164 { 0, NULL } 165 }; 166 167 static const struct tok lsa_opaque_ri_tlv_cap_values[] = { 168 { 1, "Reserved" }, 169 { 2, "Reserved" }, 170 { 4, "Reserved" }, 171 { 8, "Reserved" }, 172 { 16, "graceful restart capable" }, 173 { 32, "graceful restart helper" }, 174 { 64, "Stub router support" }, 175 { 128, "Traffic engineering" }, 176 { 256, "p2p over LAN" }, 177 { 512, "path computation server" }, 178 { 0, NULL } 179 }; 180 181 static const struct tok ospf_lls_tlv_values[] = { 182 { OSPF_LLS_EO, "Extended Options" }, 183 { OSPF_LLS_MD5, "MD5 Authentication" }, 184 { 0, NULL } 185 }; 186 187 static const struct tok ospf_lls_eo_options[] = { 188 { OSPF_LLS_EO_LR, "LSDB resync" }, 189 { OSPF_LLS_EO_RS, "Restart" }, 190 { 0, NULL } 191 }; 192 193 static char tstr[] = " [|ospf2]"; 194 195 static int ospf_print_lshdr(const struct lsa_hdr *); 196 static const u_char *ospf_print_lsa(const struct lsa *); 197 static int ospf_decode_v2(const struct ospfhdr *, const u_char *); 198 static int ospf_decode_lls(const struct ospfhdr *, register u_int); 199 200 int 201 ospf_print_grace_lsa (const u_int8_t *tptr, u_int ls_length) { 202 203 u_int tlv_type, tlv_length; 204 205 206 while (ls_length > 0) { 207 TCHECK2(*tptr, 4); 208 if (ls_length < 4) { 209 printf("\n\t Remaining LS length %u < 4", ls_length); 210 return -1; 211 } 212 tlv_type = EXTRACT_16BITS(tptr); 213 tlv_length = EXTRACT_16BITS(tptr+2); 214 tptr+=4; 215 ls_length-=4; 216 217 printf("\n\t %s TLV (%u), length %u, value: ", 218 tok2str(lsa_opaque_grace_tlv_values,"unknown",tlv_type), 219 tlv_type, 220 tlv_length); 221 222 if (tlv_length > ls_length) { 223 printf("\n\t Bogus length %u > %u", tlv_length, 224 ls_length); 225 return -1; 226 } 227 228 /* Infinite loop protection. */ 229 if (tlv_type == 0 || tlv_length ==0) { 230 return -1; 231 } 232 233 TCHECK2(*tptr, tlv_length); 234 switch(tlv_type) { 235 236 case LS_OPAQUE_GRACE_TLV_PERIOD: 237 if (tlv_length != 4) { 238 printf("\n\t Bogus length %u != 4", tlv_length); 239 return -1; 240 } 241 printf("%us",EXTRACT_32BITS(tptr)); 242 break; 243 244 case LS_OPAQUE_GRACE_TLV_REASON: 245 if (tlv_length != 1) { 246 printf("\n\t Bogus length %u != 1", tlv_length); 247 return -1; 248 } 249 printf("%s (%u)", 250 tok2str(lsa_opaque_grace_tlv_reason_values, "Unknown", *tptr), 251 *tptr); 252 break; 253 254 case LS_OPAQUE_GRACE_TLV_INT_ADDRESS: 255 if (tlv_length != 4) { 256 printf("\n\t Bogus length %u != 4", tlv_length); 257 return -1; 258 } 259 printf("%s", ipaddr_string(tptr)); 260 break; 261 262 default: 263 if (vflag <= 1) { 264 if(!print_unknown_data(tptr,"\n\t ",tlv_length)) 265 return -1; 266 } 267 break; 268 269 } 270 /* in OSPF everything has to be 32-bit aligned, including TLVs */ 271 if (tlv_length%4 != 0) 272 tlv_length+=4-(tlv_length%4); 273 ls_length-=tlv_length; 274 tptr+=tlv_length; 275 } 276 277 return 0; 278 trunc: 279 return -1; 280 } 281 282 int 283 ospf_print_te_lsa (const u_int8_t *tptr, u_int ls_length) { 284 285 u_int tlv_type, tlv_length, subtlv_type, subtlv_length; 286 u_int priority_level, te_class, count_srlg; 287 union { /* int to float conversion buffer for several subTLVs */ 288 float f; 289 u_int32_t i; 290 } bw; 291 292 while (ls_length != 0) { 293 TCHECK2(*tptr, 4); 294 if (ls_length < 4) { 295 printf("\n\t Remaining LS length %u < 4", ls_length); 296 return -1; 297 } 298 tlv_type = EXTRACT_16BITS(tptr); 299 tlv_length = EXTRACT_16BITS(tptr+2); 300 tptr+=4; 301 ls_length-=4; 302 303 printf("\n\t %s TLV (%u), length: %u", 304 tok2str(lsa_opaque_te_tlv_values,"unknown",tlv_type), 305 tlv_type, 306 tlv_length); 307 308 if (tlv_length > ls_length) { 309 printf("\n\t Bogus length %u > %u", tlv_length, 310 ls_length); 311 return -1; 312 } 313 314 /* Infinite loop protection. */ 315 if (tlv_type == 0 || tlv_length ==0) { 316 return -1; 317 } 318 319 switch(tlv_type) { 320 case LS_OPAQUE_TE_TLV_LINK: 321 while (tlv_length >= sizeof(subtlv_type) + sizeof(subtlv_length)) { 322 if (tlv_length < 4) { 323 printf("\n\t Remaining TLV length %u < 4", 324 tlv_length); 325 return -1; 326 } 327 TCHECK2(*tptr, 4); 328 subtlv_type = EXTRACT_16BITS(tptr); 329 subtlv_length = EXTRACT_16BITS(tptr+2); 330 tptr+=4; 331 tlv_length-=4; 332 333 printf("\n\t %s subTLV (%u), length: %u", 334 tok2str(lsa_opaque_te_link_tlv_subtlv_values,"unknown",subtlv_type), 335 subtlv_type, 336 subtlv_length); 337 338 TCHECK2(*tptr, subtlv_length); 339 switch(subtlv_type) { 340 case LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP: 341 printf(", 0x%08x", EXTRACT_32BITS(tptr)); 342 break; 343 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID: 344 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID: 345 printf(", %s (0x%08x)", 346 ipaddr_string(tptr), 347 EXTRACT_32BITS(tptr)); 348 if (subtlv_length == 8) /* rfc4203 */ 349 printf(", %s (0x%08x)", 350 ipaddr_string(tptr+4), 351 EXTRACT_32BITS(tptr+4)); 352 break; 353 case LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP: 354 case LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP: 355 printf(", %s", ipaddr_string(tptr)); 356 break; 357 case LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW: 358 case LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW: 359 bw.i = EXTRACT_32BITS(tptr); 360 printf(", %.3f Mbps", bw.f*8/1000000 ); 361 break; 362 case LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW: 363 for (te_class = 0; te_class < 8; te_class++) { 364 bw.i = EXTRACT_32BITS(tptr+te_class*4); 365 printf("\n\t\tTE-Class %u: %.3f Mbps", 366 te_class, 367 bw.f*8/1000000 ); 368 } 369 break; 370 case LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS: 371 printf("\n\t\tBandwidth Constraints Model ID: %s (%u)", 372 tok2str(diffserv_te_bc_values, "unknown", *tptr), 373 *tptr); 374 /* decode BCs until the subTLV ends */ 375 for (te_class = 0; te_class < (subtlv_length-4)/4; te_class++) { 376 bw.i = EXTRACT_32BITS(tptr+4+te_class*4); 377 printf("\n\t\t Bandwidth constraint CT%u: %.3f Mbps", 378 te_class, 379 bw.f*8/1000000 ); 380 } 381 break; 382 case LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC: 383 printf(", Metric %u", EXTRACT_32BITS(tptr)); 384 break; 385 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE: 386 printf(", %s, Priority %u", 387 bittok2str(gmpls_link_prot_values, "none", *tptr), 388 *(tptr+1)); 389 break; 390 case LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR: 391 printf("\n\t\tInterface Switching Capability: %s", 392 tok2str(gmpls_switch_cap_values, "Unknown", *(tptr))); 393 printf("\n\t\tLSP Encoding: %s\n\t\tMax LSP Bandwidth:", 394 tok2str(gmpls_encoding_values, "Unknown", *(tptr+1))); 395 for (priority_level = 0; priority_level < 8; priority_level++) { 396 bw.i = EXTRACT_32BITS(tptr+4+(priority_level*4)); 397 printf("\n\t\t priority level %d: %.3f Mbps", 398 priority_level, 399 bw.f*8/1000000 ); 400 } 401 break; 402 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE: 403 printf(", %s (%u)", 404 tok2str(lsa_opaque_te_tlv_link_type_sub_tlv_values,"unknown",*tptr), 405 *tptr); 406 break; 407 408 case LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP: 409 count_srlg = subtlv_length / 4; 410 if (count_srlg != 0) 411 printf("\n\t\t Shared risk group: "); 412 while (count_srlg > 0) { 413 bw.i = EXTRACT_32BITS(tptr); 414 printf("%d",bw.i); 415 tptr+=4; 416 count_srlg--; 417 if (count_srlg > 0) 418 printf(", "); 419 } 420 break; 421 422 default: 423 if (vflag <= 1) { 424 if(!print_unknown_data(tptr,"\n\t\t",subtlv_length)) 425 return -1; 426 } 427 break; 428 } 429 /* in OSPF everything has to be 32-bit aligned, including subTLVs */ 430 if (subtlv_length%4 != 0) 431 subtlv_length+=4-(subtlv_length%4); 432 433 tlv_length-=subtlv_length; 434 tptr+=subtlv_length; 435 436 } 437 break; 438 439 case LS_OPAQUE_TE_TLV_ROUTER: 440 if (tlv_length < 4) { 441 printf("\n\t TLV length %u < 4", tlv_length); 442 return -1; 443 } 444 TCHECK2(*tptr, 4); 445 printf(", %s", ipaddr_string(tptr)); 446 break; 447 448 default: 449 if (vflag <= 1) { 450 if(!print_unknown_data(tptr,"\n\t ",tlv_length)) 451 return -1; 452 } 453 break; 454 } 455 /* in OSPF everything has to be 32-bit aligned, including TLVs */ 456 if (tlv_length%4 != 0) 457 tlv_length+=4-(tlv_length%4); 458 ls_length-=tlv_length; 459 tptr+=tlv_length; 460 } 461 return 0; 462 trunc: 463 return -1; 464 } 465 466 467 static int 468 ospf_print_lshdr(register const struct lsa_hdr *lshp) 469 { 470 u_int ls_length; 471 472 TCHECK(lshp->ls_length); 473 ls_length = EXTRACT_16BITS(&lshp->ls_length); 474 if (ls_length < sizeof(struct lsa_hdr)) { 475 printf("\n\t Bogus length %u < header (%lu)", ls_length, 476 (unsigned long)sizeof(struct lsa_hdr)); 477 return(-1); 478 } 479 480 TCHECK(lshp->ls_seq); /* XXX - ls_length check checked this */ 481 printf("\n\t Advertising Router %s, seq 0x%08x, age %us, length %u", 482 ipaddr_string(&lshp->ls_router), 483 EXTRACT_32BITS(&lshp->ls_seq), 484 EXTRACT_16BITS(&lshp->ls_age), 485 ls_length-(u_int)sizeof(struct lsa_hdr)); 486 487 TCHECK(lshp->ls_type); /* XXX - ls_length check checked this */ 488 switch (lshp->ls_type) { 489 /* the LSA header for opaque LSAs was slightly changed */ 490 case LS_TYPE_OPAQUE_LL: 491 case LS_TYPE_OPAQUE_AL: 492 case LS_TYPE_OPAQUE_DW: 493 printf("\n\t %s LSA (%d), Opaque-Type %s LSA (%u), Opaque-ID %u", 494 tok2str(lsa_values,"unknown",lshp->ls_type), 495 lshp->ls_type, 496 497 tok2str(lsa_opaque_values, 498 "unknown", 499 *(&lshp->un_lsa_id.opaque_field.opaque_type)), 500 *(&lshp->un_lsa_id.opaque_field.opaque_type), 501 EXTRACT_24BITS(&lshp->un_lsa_id.opaque_field.opaque_id) 502 503 ); 504 break; 505 506 /* all other LSA types use regular style LSA headers */ 507 default: 508 printf("\n\t %s LSA (%d), LSA-ID: %s", 509 tok2str(lsa_values,"unknown",lshp->ls_type), 510 lshp->ls_type, 511 ipaddr_string(&lshp->un_lsa_id.lsa_id)); 512 break; 513 } 514 515 TCHECK(lshp->ls_options); /* XXX - ls_length check checked this */ 516 printf("\n\t Options: [%s]", bittok2str(ospf_option_values,"none",lshp->ls_options)); 517 518 return (ls_length); 519 trunc: 520 return (-1); 521 } 522 523 /* draft-ietf-ospf-mt-09 */ 524 static const struct tok ospf_topology_values[] = { 525 { 0, "default " }, 526 { 1, "multicast " }, 527 { 2, "management " }, 528 { 0, NULL } 529 }; 530 531 /* 532 * Print all the per-topology metrics. 533 */ 534 static void 535 ospf_print_tos_metrics(const union un_tos *tos) 536 { 537 int metric_count; 538 int toscount; 539 540 toscount = tos->link.link_tos_count+1; 541 metric_count = 0; 542 543 /* 544 * All but the first metric contain a valid topology id. 545 */ 546 while (toscount) { 547 printf("\n\t\ttopology %s(%u), metric %u", 548 tok2str(ospf_topology_values, "", 549 metric_count ? tos->metrics.tos_type : 0), 550 metric_count ? tos->metrics.tos_type : 0, 551 EXTRACT_16BITS(&tos->metrics.tos_metric)); 552 metric_count++; 553 tos++; 554 toscount--; 555 } 556 } 557 558 /* 559 * Print a single link state advertisement. If truncated or if LSA length 560 * field is less than the length of the LSA header, return NULl, else 561 * return pointer to data past end of LSA. 562 */ 563 static const u_int8_t * 564 ospf_print_lsa(register const struct lsa *lsap) 565 { 566 register const u_int8_t *ls_end; 567 register const struct rlalink *rlp; 568 register const struct in_addr *ap; 569 register const struct aslametric *almp; 570 register const struct mcla *mcp; 571 register const u_int32_t *lp; 572 register int j, tlv_type, tlv_length, topology; 573 register int ls_length; 574 const u_int8_t *tptr; 575 576 tptr = (u_int8_t *)lsap->lsa_un.un_unknown; /* squelch compiler warnings */ 577 ls_length = ospf_print_lshdr(&lsap->ls_hdr); 578 if (ls_length == -1) 579 return(NULL); 580 ls_end = (u_int8_t *)lsap + ls_length; 581 ls_length -= sizeof(struct lsa_hdr); 582 583 switch (lsap->ls_hdr.ls_type) { 584 585 case LS_TYPE_ROUTER: 586 TCHECK(lsap->lsa_un.un_rla.rla_flags); 587 printf("\n\t Router LSA Options: [%s]", bittok2str(ospf_rla_flag_values,"none",lsap->lsa_un.un_rla.rla_flags)); 588 589 TCHECK(lsap->lsa_un.un_rla.rla_count); 590 j = EXTRACT_16BITS(&lsap->lsa_un.un_rla.rla_count); 591 TCHECK(lsap->lsa_un.un_rla.rla_link); 592 rlp = lsap->lsa_un.un_rla.rla_link; 593 while (j--) { 594 TCHECK(*rlp); 595 switch (rlp->un_tos.link.link_type) { 596 597 case RLA_TYPE_VIRTUAL: 598 printf("\n\t Virtual Link: Neighbor Router-ID: %s, Interface Address: %s", 599 ipaddr_string(&rlp->link_id), 600 ipaddr_string(&rlp->link_data)); 601 break; 602 603 case RLA_TYPE_ROUTER: 604 printf("\n\t Neighbor Router-ID: %s, Interface Address: %s", 605 ipaddr_string(&rlp->link_id), 606 ipaddr_string(&rlp->link_data)); 607 break; 608 609 case RLA_TYPE_TRANSIT: 610 printf("\n\t Neighbor Network-ID: %s, Interface Address: %s", 611 ipaddr_string(&rlp->link_id), 612 ipaddr_string(&rlp->link_data)); 613 break; 614 615 case RLA_TYPE_STUB: 616 printf("\n\t Stub Network: %s, Mask: %s", 617 ipaddr_string(&rlp->link_id), 618 ipaddr_string(&rlp->link_data)); 619 break; 620 621 default: 622 printf("\n\t Unknown Router Link Type (%u)", 623 rlp->un_tos.link.link_type); 624 return (ls_end); 625 } 626 627 ospf_print_tos_metrics(&rlp->un_tos); 628 629 rlp = (struct rlalink *)((u_char *)(rlp + 1) + 630 ((rlp->un_tos.link.link_tos_count) * sizeof(union un_tos))); 631 } 632 break; 633 634 case LS_TYPE_NETWORK: 635 TCHECK(lsap->lsa_un.un_nla.nla_mask); 636 printf("\n\t Mask %s\n\t Connected Routers:", 637 ipaddr_string(&lsap->lsa_un.un_nla.nla_mask)); 638 ap = lsap->lsa_un.un_nla.nla_router; 639 while ((u_char *)ap < ls_end) { 640 TCHECK(*ap); 641 printf("\n\t %s", ipaddr_string(ap)); 642 ++ap; 643 } 644 break; 645 646 case LS_TYPE_SUM_IP: 647 TCHECK(lsap->lsa_un.un_nla.nla_mask); 648 printf("\n\t Mask %s", 649 ipaddr_string(&lsap->lsa_un.un_sla.sla_mask)); 650 TCHECK(lsap->lsa_un.un_sla.sla_tosmetric); 651 lp = lsap->lsa_un.un_sla.sla_tosmetric; 652 while ((u_char *)lp < ls_end) { 653 register u_int32_t ul; 654 655 TCHECK(*lp); 656 ul = EXTRACT_32BITS(lp); 657 topology = (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS; 658 printf("\n\t\ttopology %s(%u) metric %d", 659 tok2str(ospf_topology_values, "", topology), 660 topology, 661 ul & SLA_MASK_METRIC); 662 ++lp; 663 } 664 break; 665 666 case LS_TYPE_SUM_ABR: 667 TCHECK(lsap->lsa_un.un_sla.sla_tosmetric); 668 lp = lsap->lsa_un.un_sla.sla_tosmetric; 669 while ((u_char *)lp < ls_end) { 670 register u_int32_t ul; 671 672 TCHECK(*lp); 673 ul = EXTRACT_32BITS(lp); 674 topology = (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS; 675 printf("\n\t\ttopology %s(%u) metric %d", 676 tok2str(ospf_topology_values, "", topology), 677 topology, 678 ul & SLA_MASK_METRIC); 679 ++lp; 680 } 681 break; 682 683 case LS_TYPE_ASE: 684 case LS_TYPE_NSSA: /* fall through - those LSAs share the same format */ 685 TCHECK(lsap->lsa_un.un_nla.nla_mask); 686 printf("\n\t Mask %s", 687 ipaddr_string(&lsap->lsa_un.un_asla.asla_mask)); 688 689 TCHECK(lsap->lsa_un.un_sla.sla_tosmetric); 690 almp = lsap->lsa_un.un_asla.asla_metric; 691 while ((u_char *)almp < ls_end) { 692 register u_int32_t ul; 693 694 TCHECK(almp->asla_tosmetric); 695 ul = EXTRACT_32BITS(&almp->asla_tosmetric); 696 topology = ((ul & ASLA_MASK_TOS) >> ASLA_SHIFT_TOS); 697 printf("\n\t\ttopology %s(%u), type %d, metric", 698 tok2str(ospf_topology_values, "", topology), 699 topology, 700 (ul & ASLA_FLAG_EXTERNAL) ? 2 : 1); 701 if ((ul & ASLA_MASK_METRIC)==0xffffff) 702 printf(" infinite"); 703 else 704 printf(" %d", (ul & ASLA_MASK_METRIC)); 705 706 TCHECK(almp->asla_forward); 707 if (almp->asla_forward.s_addr) { 708 printf(", forward %s", 709 ipaddr_string(&almp->asla_forward)); 710 } 711 TCHECK(almp->asla_tag); 712 if (almp->asla_tag.s_addr) { 713 printf(", tag %s", 714 ipaddr_string(&almp->asla_tag)); 715 } 716 ++almp; 717 } 718 break; 719 720 case LS_TYPE_GROUP: 721 /* Multicast extensions as of 23 July 1991 */ 722 mcp = lsap->lsa_un.un_mcla; 723 while ((u_char *)mcp < ls_end) { 724 TCHECK(mcp->mcla_vid); 725 switch (EXTRACT_32BITS(&mcp->mcla_vtype)) { 726 727 case MCLA_VERTEX_ROUTER: 728 printf("\n\t Router Router-ID %s", 729 ipaddr_string(&mcp->mcla_vid)); 730 break; 731 732 case MCLA_VERTEX_NETWORK: 733 printf("\n\t Network Designated Router %s", 734 ipaddr_string(&mcp->mcla_vid)); 735 break; 736 737 default: 738 printf("\n\t unknown VertexType (%u)", 739 EXTRACT_32BITS(&mcp->mcla_vtype)); 740 break; 741 } 742 ++mcp; 743 } 744 break; 745 746 case LS_TYPE_OPAQUE_LL: /* fall through */ 747 case LS_TYPE_OPAQUE_AL: 748 case LS_TYPE_OPAQUE_DW: 749 750 switch (*(&lsap->ls_hdr.un_lsa_id.opaque_field.opaque_type)) { 751 case LS_OPAQUE_TYPE_RI: 752 tptr = (u_int8_t *)(&lsap->lsa_un.un_ri_tlv.type); 753 754 while (ls_length != 0) { 755 TCHECK2(*tptr, 4); 756 if (ls_length < 4) { 757 printf("\n\t Remaining LS length %u < 4", ls_length); 758 return(ls_end); 759 } 760 tlv_type = EXTRACT_16BITS(tptr); 761 tlv_length = EXTRACT_16BITS(tptr+2); 762 tptr+=4; 763 ls_length-=4; 764 765 printf("\n\t %s TLV (%u), length: %u, value: ", 766 tok2str(lsa_opaque_ri_tlv_values,"unknown",tlv_type), 767 tlv_type, 768 tlv_length); 769 770 if (tlv_length > ls_length) { 771 printf("\n\t Bogus length %u > %u", tlv_length, 772 ls_length); 773 return(ls_end); 774 } 775 TCHECK2(*tptr, tlv_length); 776 switch(tlv_type) { 777 778 case LS_OPAQUE_RI_TLV_CAP: 779 if (tlv_length != 4) { 780 printf("\n\t Bogus length %u != 4", tlv_length); 781 return(ls_end); 782 } 783 printf("Capabilities: %s", 784 bittok2str(lsa_opaque_ri_tlv_cap_values, "Unknown", EXTRACT_32BITS(tptr))); 785 break; 786 default: 787 if (vflag <= 1) { 788 if(!print_unknown_data(tptr,"\n\t ",tlv_length)) 789 return(ls_end); 790 } 791 break; 792 793 } 794 tptr+=tlv_length; 795 ls_length-=tlv_length; 796 } 797 break; 798 799 case LS_OPAQUE_TYPE_GRACE: 800 if (ospf_print_grace_lsa((u_int8_t *)(&lsap->lsa_un.un_grace_tlv.type), 801 ls_length) == -1) { 802 return(ls_end); 803 } 804 break; 805 806 case LS_OPAQUE_TYPE_TE: 807 if (ospf_print_te_lsa((u_int8_t *)(&lsap->lsa_un.un_te_lsa_tlv.type), 808 ls_length) == -1) { 809 return(ls_end); 810 } 811 break; 812 813 default: 814 if (vflag <= 1) { 815 if(!print_unknown_data((u_int8_t *)lsap->lsa_un.un_unknown, 816 "\n\t ", ls_length)) 817 return(ls_end); 818 } 819 break; 820 } 821 } 822 823 /* do we want to see an additionally hexdump ? */ 824 if (vflag> 1) 825 if(!print_unknown_data((u_int8_t *)lsap->lsa_un.un_unknown, 826 "\n\t ", ls_length)) { 827 return(ls_end); 828 } 829 830 return (ls_end); 831 trunc: 832 return (NULL); 833 } 834 835 static int 836 ospf_decode_lls(register const struct ospfhdr *op, 837 register u_int length) 838 { 839 register const u_char *dptr; 840 register const u_char *dataend; 841 register u_int length2; 842 register u_int16_t lls_type, lls_len; 843 register u_int32_t lls_flags; 844 845 switch (op->ospf_type) { 846 847 case OSPF_TYPE_HELLO: 848 if (!(op->ospf_hello.hello_options & OSPF_OPTION_L)) 849 return (0); 850 break; 851 852 case OSPF_TYPE_DD: 853 if (!(op->ospf_db.db_options & OSPF_OPTION_L)) 854 return (0); 855 break; 856 857 default: 858 return (0); 859 } 860 861 /* dig deeper if LLS data is available; see RFC4813 */ 862 length2 = EXTRACT_16BITS(&op->ospf_len); 863 dptr = (u_char *)op + length2; 864 dataend = (u_char *)op + length; 865 866 if (EXTRACT_16BITS(&op->ospf_authtype) == OSPF_AUTH_MD5) { 867 dptr = dptr + op->ospf_authdata[3]; 868 length2 += op->ospf_authdata[3]; 869 } 870 if (length2 >= length) { 871 printf("\n\t[LLS truncated]"); 872 return (1); 873 } 874 TCHECK2(*dptr, 2); 875 printf("\n\t LLS: checksum: 0x%04x", (u_int)EXTRACT_16BITS(dptr)); 876 877 dptr += 2; 878 TCHECK2(*dptr, 2); 879 length2 = EXTRACT_16BITS(dptr); 880 printf(", length: %u", length2); 881 882 dptr += 2; 883 TCHECK(*dptr); 884 while (dptr < dataend) { 885 TCHECK2(*dptr, 2); 886 lls_type = EXTRACT_16BITS(dptr); 887 printf("\n\t %s (%u)", 888 tok2str(ospf_lls_tlv_values,"Unknown TLV",lls_type), 889 lls_type); 890 dptr += 2; 891 TCHECK2(*dptr, 2); 892 lls_len = EXTRACT_16BITS(dptr); 893 printf(", length: %u", lls_len); 894 dptr += 2; 895 switch (lls_type) { 896 897 case OSPF_LLS_EO: 898 if (lls_len != 4) { 899 printf(" [should be 4]"); 900 lls_len = 4; 901 } 902 TCHECK2(*dptr, 4); 903 lls_flags = EXTRACT_32BITS(dptr); 904 printf("\n\t Options: 0x%08x [%s]", lls_flags, 905 bittok2str(ospf_lls_eo_options,"?",lls_flags)); 906 907 break; 908 909 case OSPF_LLS_MD5: 910 if (lls_len != 20) { 911 printf(" [should be 20]"); 912 lls_len = 20; 913 } 914 TCHECK2(*dptr, 4); 915 printf("\n\t Sequence number: 0x%08x", EXTRACT_32BITS(dptr)); 916 break; 917 } 918 919 dptr += lls_len; 920 } 921 922 return (0); 923 trunc: 924 return (1); 925 } 926 927 static int 928 ospf_decode_v2(register const struct ospfhdr *op, 929 register const u_char *dataend) 930 { 931 register const struct in_addr *ap; 932 register const struct lsr *lsrp; 933 register const struct lsa_hdr *lshp; 934 register const struct lsa *lsap; 935 register u_int32_t lsa_count,lsa_count_max; 936 937 switch (op->ospf_type) { 938 939 case OSPF_TYPE_UMD: 940 /* 941 * Rob Coltun's special monitoring packets; 942 * do nothing 943 */ 944 break; 945 946 case OSPF_TYPE_HELLO: 947 printf("\n\tOptions [%s]", 948 bittok2str(ospf_option_values,"none",op->ospf_hello.hello_options)); 949 950 TCHECK(op->ospf_hello.hello_deadint); 951 printf("\n\t Hello Timer %us, Dead Timer %us, Mask %s, Priority %u", 952 EXTRACT_16BITS(&op->ospf_hello.hello_helloint), 953 EXTRACT_32BITS(&op->ospf_hello.hello_deadint), 954 ipaddr_string(&op->ospf_hello.hello_mask), 955 op->ospf_hello.hello_priority); 956 957 TCHECK(op->ospf_hello.hello_dr); 958 if (op->ospf_hello.hello_dr.s_addr != 0) 959 printf("\n\t Designated Router %s", 960 ipaddr_string(&op->ospf_hello.hello_dr)); 961 962 TCHECK(op->ospf_hello.hello_bdr); 963 if (op->ospf_hello.hello_bdr.s_addr != 0) 964 printf(", Backup Designated Router %s", 965 ipaddr_string(&op->ospf_hello.hello_bdr)); 966 967 ap = op->ospf_hello.hello_neighbor; 968 if ((u_char *)ap < dataend) 969 printf("\n\t Neighbor List:"); 970 while ((u_char *)ap < dataend) { 971 TCHECK(*ap); 972 printf("\n\t %s", ipaddr_string(ap)); 973 ++ap; 974 } 975 break; /* HELLO */ 976 977 case OSPF_TYPE_DD: 978 TCHECK(op->ospf_db.db_options); 979 printf("\n\tOptions [%s]", 980 bittok2str(ospf_option_values,"none",op->ospf_db.db_options)); 981 TCHECK(op->ospf_db.db_flags); 982 printf(", DD Flags [%s]", 983 bittok2str(ospf_dd_flag_values,"none",op->ospf_db.db_flags)); 984 TCHECK(op->ospf_db.db_ifmtu); 985 if (op->ospf_db.db_ifmtu) { 986 printf(", MTU: %u", EXTRACT_16BITS(&op->ospf_db.db_ifmtu)); 987 } 988 TCHECK(op->ospf_db.db_seq); 989 printf(", Sequence: 0x%08x", EXTRACT_32BITS(&op->ospf_db.db_seq)); 990 991 /* Print all the LS adv's */ 992 lshp = op->ospf_db.db_lshdr; 993 while (((u_char *)lshp < dataend) && ospf_print_lshdr(lshp) != -1) { 994 ++lshp; 995 } 996 break; 997 998 case OSPF_TYPE_LS_REQ: 999 lsrp = op->ospf_lsr; 1000 while ((u_char *)lsrp < dataend) { 1001 TCHECK(*lsrp); 1002 1003 printf("\n\t Advertising Router: %s, %s LSA (%u)", 1004 ipaddr_string(&lsrp->ls_router), 1005 tok2str(lsa_values,"unknown",EXTRACT_32BITS(lsrp->ls_type)), 1006 EXTRACT_32BITS(&lsrp->ls_type)); 1007 1008 switch (EXTRACT_32BITS(lsrp->ls_type)) { 1009 /* the LSA header for opaque LSAs was slightly changed */ 1010 case LS_TYPE_OPAQUE_LL: 1011 case LS_TYPE_OPAQUE_AL: 1012 case LS_TYPE_OPAQUE_DW: 1013 printf(", Opaque-Type: %s LSA (%u), Opaque-ID: %u", 1014 tok2str(lsa_opaque_values, "unknown",lsrp->un_ls_stateid.opaque_field.opaque_type), 1015 lsrp->un_ls_stateid.opaque_field.opaque_type, 1016 EXTRACT_24BITS(&lsrp->un_ls_stateid.opaque_field.opaque_id)); 1017 break; 1018 default: 1019 printf(", LSA-ID: %s", 1020 ipaddr_string(&lsrp->un_ls_stateid.ls_stateid)); 1021 break; 1022 } 1023 1024 ++lsrp; 1025 } 1026 break; 1027 1028 case OSPF_TYPE_LS_UPDATE: 1029 lsap = op->ospf_lsu.lsu_lsa; 1030 TCHECK(op->ospf_lsu.lsu_count); 1031 lsa_count_max = EXTRACT_32BITS(&op->ospf_lsu.lsu_count); 1032 printf(", %d LSA%s",lsa_count_max, PLURAL_SUFFIX(lsa_count_max)); 1033 for (lsa_count=1;lsa_count <= lsa_count_max;lsa_count++) { 1034 printf("\n\t LSA #%u",lsa_count); 1035 lsap = (const struct lsa *)ospf_print_lsa(lsap); 1036 if (lsap == NULL) 1037 goto trunc; 1038 } 1039 break; 1040 1041 case OSPF_TYPE_LS_ACK: 1042 lshp = op->ospf_lsa.lsa_lshdr; 1043 while (ospf_print_lshdr(lshp) != -1) { 1044 ++lshp; 1045 } 1046 break; 1047 1048 default: 1049 break; 1050 } 1051 return (0); 1052 trunc: 1053 return (1); 1054 } 1055 1056 void 1057 ospf_print(register const u_char *bp, register u_int length, 1058 const u_char *bp2 _U_) 1059 { 1060 register const struct ospfhdr *op; 1061 register const u_char *dataend; 1062 register const char *cp; 1063 1064 op = (struct ospfhdr *)bp; 1065 1066 /* XXX Before we do anything else, strip off the MD5 trailer */ 1067 TCHECK(op->ospf_authtype); 1068 if (EXTRACT_16BITS(&op->ospf_authtype) == OSPF_AUTH_MD5) { 1069 length -= OSPF_AUTH_MD5_LEN; 1070 snapend -= OSPF_AUTH_MD5_LEN; 1071 } 1072 1073 /* If the type is valid translate it, or just print the type */ 1074 /* value. If it's not valid, say so and return */ 1075 TCHECK(op->ospf_type); 1076 cp = tok2str(type2str, "unknown LS-type", op->ospf_type); 1077 printf("OSPFv%u, %s, length %u", 1078 op->ospf_version, 1079 cp, 1080 length); 1081 if (*cp == 'u') 1082 return; 1083 1084 if(!vflag) { /* non verbose - so lets bail out here */ 1085 return; 1086 } 1087 1088 TCHECK(op->ospf_len); 1089 if (length != EXTRACT_16BITS(&op->ospf_len)) { 1090 printf(" [len %d]", EXTRACT_16BITS(&op->ospf_len)); 1091 } 1092 1093 if (length > EXTRACT_16BITS(&op->ospf_len)) { 1094 dataend = bp + EXTRACT_16BITS(&op->ospf_len); 1095 } else { 1096 dataend = bp + length; 1097 } 1098 1099 TCHECK(op->ospf_routerid); 1100 printf("\n\tRouter-ID %s", ipaddr_string(&op->ospf_routerid)); 1101 1102 TCHECK(op->ospf_areaid); 1103 if (op->ospf_areaid.s_addr != 0) 1104 printf(", Area %s", ipaddr_string(&op->ospf_areaid)); 1105 else 1106 printf(", Backbone Area"); 1107 1108 if (vflag) { 1109 /* Print authentication data (should we really do this?) */ 1110 TCHECK2(op->ospf_authdata[0], sizeof(op->ospf_authdata)); 1111 1112 printf(", Authentication Type: %s (%u)", 1113 tok2str(ospf_authtype_values,"unknown",EXTRACT_16BITS(&op->ospf_authtype)), 1114 EXTRACT_16BITS(&op->ospf_authtype)); 1115 1116 switch (EXTRACT_16BITS(&op->ospf_authtype)) { 1117 1118 case OSPF_AUTH_NONE: 1119 break; 1120 1121 case OSPF_AUTH_SIMPLE: 1122 printf("\n\tSimple text password: "); 1123 safeputs((const char *)op->ospf_authdata, OSPF_AUTH_SIMPLE_LEN); 1124 break; 1125 1126 case OSPF_AUTH_MD5: 1127 printf("\n\tKey-ID: %u, Auth-Length: %u, Crypto Sequence Number: 0x%08x", 1128 *((op->ospf_authdata)+2), 1129 *((op->ospf_authdata)+3), 1130 EXTRACT_32BITS((op->ospf_authdata)+4)); 1131 break; 1132 1133 default: 1134 return; 1135 } 1136 } 1137 /* Do rest according to version. */ 1138 switch (op->ospf_version) { 1139 1140 case 2: 1141 /* ospf version 2 */ 1142 if (ospf_decode_v2(op, dataend)) 1143 goto trunc; 1144 if (length > EXTRACT_16BITS(&op->ospf_len)) { 1145 if (ospf_decode_lls(op, length)) 1146 goto trunc; 1147 } 1148 break; 1149 1150 default: 1151 printf(" ospf [version %d]", op->ospf_version); 1152 break; 1153 } /* end switch on version */ 1154 1155 return; 1156 trunc: 1157 fputs(tstr, stdout); 1158 } 1159
Indexes created Sat Mar 14 00:24:00 UTC 2026