1 /* 2 * Copyright (c) 1998-2006 The TCPDUMP project 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that: (1) source code 6 * distributions retain the above copyright notice and this paragraph 7 * in its entirety, and (2) distributions including binary code include 8 * the above copyright notice and this paragraph in its entirety in 9 * the documentation or other materials provided with the distribution. 10 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND 11 * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT 12 * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 13 * FOR A PARTICULAR PURPOSE. 14 * 15 * Original code by Hannes Gredler (hannes (at) juniper.net) 16 */ 17 18 /* \summary: IEEE 802.1ag Connectivity Fault Management (CFM) protocols printer */ 19 20 #ifdef HAVE_CONFIG_H 21 #include "config.h" 22 #endif 23 24 #include <netdissect-stdinc.h> 25 26 #include <stdio.h> 27 28 #include "netdissect.h" 29 #include "extract.h" 30 #include "ether.h" 31 #include "addrtoname.h" 32 #include "oui.h" 33 #include "af.h" 34 35 struct cfm_common_header_t { 36 uint8_t mdlevel_version; 37 uint8_t opcode; 38 uint8_t flags; 39 uint8_t first_tlv_offset; 40 }; 41 42 #define CFM_VERSION 0 43 #define CFM_EXTRACT_VERSION(x) (((x)&0x1f)) 44 #define CFM_EXTRACT_MD_LEVEL(x) (((x)&0xe0)>>5) 45 46 #define CFM_OPCODE_CCM 1 47 #define CFM_OPCODE_LBR 2 48 #define CFM_OPCODE_LBM 3 49 #define CFM_OPCODE_LTR 4 50 #define CFM_OPCODE_LTM 5 51 52 static const struct tok cfm_opcode_values[] = { 53 { CFM_OPCODE_CCM, "Continouity Check Message"}, 54 { CFM_OPCODE_LBR, "Loopback Reply"}, 55 { CFM_OPCODE_LBM, "Loopback Message"}, 56 { CFM_OPCODE_LTR, "Linktrace Reply"}, 57 { CFM_OPCODE_LTM, "Linktrace Message"}, 58 { 0, NULL} 59 }; 60 61 /* 62 * Message Formats. 63 */ 64 struct cfm_ccm_t { 65 uint8_t sequence[4]; 66 uint8_t ma_epi[2]; 67 uint8_t names[48]; 68 uint8_t itu_t_y_1731[16]; 69 }; 70 71 /* 72 * Timer Bases for the CCM Interval field. 73 * Expressed in units of seconds. 74 */ 75 static const float ccm_interval_base[8] = {0, 0.003333, 0.01, 0.1, 1, 10, 60, 600}; 76 #define CCM_INTERVAL_MIN_MULTIPLIER 3.25 77 #define CCM_INTERVAL_MAX_MULTIPLIER 3.5 78 79 #define CFM_CCM_RDI_FLAG 0x80 80 #define CFM_EXTRACT_CCM_INTERVAL(x) (((x)&0x07)) 81 82 #define CFM_CCM_MD_FORMAT_8021 0 83 #define CFM_CCM_MD_FORMAT_NONE 1 84 #define CFM_CCM_MD_FORMAT_DNS 2 85 #define CFM_CCM_MD_FORMAT_MAC 3 86 #define CFM_CCM_MD_FORMAT_CHAR 4 87 88 static const struct tok cfm_md_nameformat_values[] = { 89 { CFM_CCM_MD_FORMAT_8021, "IEEE 802.1"}, 90 { CFM_CCM_MD_FORMAT_NONE, "No MD Name present"}, 91 { CFM_CCM_MD_FORMAT_DNS, "DNS string"}, 92 { CFM_CCM_MD_FORMAT_MAC, "MAC + 16Bit Integer"}, 93 { CFM_CCM_MD_FORMAT_CHAR, "Character string"}, 94 { 0, NULL} 95 }; 96 97 #define CFM_CCM_MA_FORMAT_8021 0 98 #define CFM_CCM_MA_FORMAT_VID 1 99 #define CFM_CCM_MA_FORMAT_CHAR 2 100 #define CFM_CCM_MA_FORMAT_INT 3 101 #define CFM_CCM_MA_FORMAT_VPN 4 102 103 static const struct tok cfm_ma_nameformat_values[] = { 104 { CFM_CCM_MA_FORMAT_8021, "IEEE 802.1"}, 105 { CFM_CCM_MA_FORMAT_VID, "Primary VID"}, 106 { CFM_CCM_MA_FORMAT_CHAR, "Character string"}, 107 { CFM_CCM_MA_FORMAT_INT, "16Bit Integer"}, 108 { CFM_CCM_MA_FORMAT_VPN, "RFC2685 VPN-ID"}, 109 { 0, NULL} 110 }; 111 112 struct cfm_lbm_t { 113 uint8_t transaction_id[4]; 114 }; 115 116 struct cfm_ltm_t { 117 uint8_t transaction_id[4]; 118 uint8_t ttl; 119 uint8_t original_mac[ETHER_ADDR_LEN]; 120 uint8_t target_mac[ETHER_ADDR_LEN]; 121 }; 122 123 static const struct tok cfm_ltm_flag_values[] = { 124 { 0x80, "Use Forwarding-DB only"}, 125 { 0, NULL} 126 }; 127 128 struct cfm_ltr_t { 129 uint8_t transaction_id[4]; 130 uint8_t ttl; 131 uint8_t replay_action; 132 }; 133 134 static const struct tok cfm_ltr_flag_values[] = { 135 { 0x80, "UseFDB Only"}, 136 { 0x40, "FwdYes"}, 137 { 0x20, "Terminal MEP"}, 138 { 0, NULL} 139 }; 140 141 static const struct tok cfm_ltr_replay_action_values[] = { 142 { 1, "Exact Match"}, 143 { 2, "Filtering DB"}, 144 { 3, "MIP CCM DB"}, 145 { 0, NULL} 146 }; 147 148 149 #define CFM_TLV_END 0 150 #define CFM_TLV_SENDER_ID 1 151 #define CFM_TLV_PORT_STATUS 2 152 #define CFM_TLV_INTERFACE_STATUS 3 153 #define CFM_TLV_DATA 4 154 #define CFM_TLV_REPLY_INGRESS 5 155 #define CFM_TLV_REPLY_EGRESS 6 156 #define CFM_TLV_PRIVATE 31 157 158 static const struct tok cfm_tlv_values[] = { 159 { CFM_TLV_END, "End"}, 160 { CFM_TLV_SENDER_ID, "Sender ID"}, 161 { CFM_TLV_PORT_STATUS, "Port status"}, 162 { CFM_TLV_INTERFACE_STATUS, "Interface status"}, 163 { CFM_TLV_DATA, "Data"}, 164 { CFM_TLV_REPLY_INGRESS, "Reply Ingress"}, 165 { CFM_TLV_REPLY_EGRESS, "Reply Egress"}, 166 { CFM_TLV_PRIVATE, "Organization Specific"}, 167 { 0, NULL} 168 }; 169 170 /* 171 * TLVs 172 */ 173 174 struct cfm_tlv_header_t { 175 uint8_t type; 176 uint8_t length[2]; 177 }; 178 179 /* FIXME define TLV formats */ 180 181 static const struct tok cfm_tlv_port_status_values[] = { 182 { 1, "Blocked"}, 183 { 2, "Up"}, 184 { 0, NULL} 185 }; 186 187 static const struct tok cfm_tlv_interface_status_values[] = { 188 { 1, "Up"}, 189 { 2, "Down"}, 190 { 3, "Testing"}, 191 { 5, "Dormant"}, 192 { 6, "not present"}, 193 { 7, "lower Layer down"}, 194 { 0, NULL} 195 }; 196 197 #define CFM_CHASSIS_ID_CHASSIS_COMPONENT 1 198 #define CFM_CHASSIS_ID_INTERFACE_ALIAS 2 199 #define CFM_CHASSIS_ID_PORT_COMPONENT 3 200 #define CFM_CHASSIS_ID_MAC_ADDRESS 4 201 #define CFM_CHASSIS_ID_NETWORK_ADDRESS 5 202 #define CFM_CHASSIS_ID_INTERFACE_NAME 6 203 #define CFM_CHASSIS_ID_LOCAL 7 204 205 static const struct tok cfm_tlv_senderid_chassisid_values[] = { 206 { 0, "Reserved"}, 207 { CFM_CHASSIS_ID_CHASSIS_COMPONENT, "Chassis component"}, 208 { CFM_CHASSIS_ID_INTERFACE_ALIAS, "Interface alias"}, 209 { CFM_CHASSIS_ID_PORT_COMPONENT, "Port component"}, 210 { CFM_CHASSIS_ID_MAC_ADDRESS, "MAC address"}, 211 { CFM_CHASSIS_ID_NETWORK_ADDRESS, "Network address"}, 212 { CFM_CHASSIS_ID_INTERFACE_NAME, "Interface name"}, 213 { CFM_CHASSIS_ID_LOCAL, "Locally assigned"}, 214 { 0, NULL} 215 }; 216 217 218 static int 219 cfm_network_addr_print(netdissect_options *ndo, 220 register const u_char *tptr) 221 { 222 u_int network_addr_type; 223 u_int hexdump = FALSE; 224 225 /* 226 * Altough AFIs are tpically 2 octects wide, 227 * 802.1ab specifies that this field width 228 * is only once octet 229 */ 230 network_addr_type = *tptr; 231 ND_PRINT((ndo, "\n\t Network Address Type %s (%u)", 232 tok2str(af_values, "Unknown", network_addr_type), 233 network_addr_type)); 234 235 /* 236 * Resolve the passed in Address. 237 */ 238 switch(network_addr_type) { 239 case AFNUM_INET: 240 ND_PRINT((ndo, ", %s", ipaddr_string(ndo, tptr + 1))); 241 break; 242 243 case AFNUM_INET6: 244 ND_PRINT((ndo, ", %s", ip6addr_string(ndo, tptr + 1))); 245 break; 246 247 default: 248 hexdump = TRUE; 249 break; 250 } 251 252 return hexdump; 253 } 254 255 void 256 cfm_print(netdissect_options *ndo, 257 register const u_char *pptr, register u_int length) 258 { 259 const struct cfm_common_header_t *cfm_common_header; 260 const struct cfm_tlv_header_t *cfm_tlv_header; 261 const uint8_t *tptr, *tlv_ptr; 262 const uint8_t *namesp; 263 u_int names_data_remaining; 264 uint8_t md_nameformat, md_namelength; 265 const uint8_t *md_name; 266 uint8_t ma_nameformat, ma_namelength; 267 const uint8_t *ma_name; 268 u_int hexdump, tlen, cfm_tlv_len, cfm_tlv_type, ccm_interval; 269 270 271 union { 272 const struct cfm_ccm_t *cfm_ccm; 273 const struct cfm_lbm_t *cfm_lbm; 274 const struct cfm_ltm_t *cfm_ltm; 275 const struct cfm_ltr_t *cfm_ltr; 276 } msg_ptr; 277 278 tptr=pptr; 279 cfm_common_header = (const struct cfm_common_header_t *)pptr; 280 if (length < sizeof(*cfm_common_header)) 281 goto tooshort; 282 ND_TCHECK(*cfm_common_header); 283 284 /* 285 * Sanity checking of the header. 286 */ 287 if (CFM_EXTRACT_VERSION(cfm_common_header->mdlevel_version) != CFM_VERSION) { 288 ND_PRINT((ndo, "CFMv%u not supported, length %u", 289 CFM_EXTRACT_VERSION(cfm_common_header->mdlevel_version), length)); 290 return; 291 } 292 293 ND_PRINT((ndo, "CFMv%u %s, MD Level %u, length %u", 294 CFM_EXTRACT_VERSION(cfm_common_header->mdlevel_version), 295 tok2str(cfm_opcode_values, "unknown (%u)", cfm_common_header->opcode), 296 CFM_EXTRACT_MD_LEVEL(cfm_common_header->mdlevel_version), 297 length)); 298 299 /* 300 * In non-verbose mode just print the opcode and md-level. 301 */ 302 if (ndo->ndo_vflag < 1) { 303 return; 304 } 305 306 ND_PRINT((ndo, "\n\tFirst TLV offset %u", cfm_common_header->first_tlv_offset)); 307 308 tptr += sizeof(const struct cfm_common_header_t); 309 tlen = length - sizeof(struct cfm_common_header_t); 310 311 /* 312 * Sanity check the first TLV offset. 313 */ 314 if (cfm_common_header->first_tlv_offset > tlen) { 315 ND_PRINT((ndo, " (too large, must be <= %u)", tlen)); 316 return; 317 } 318 319 switch (cfm_common_header->opcode) { 320 case CFM_OPCODE_CCM: 321 msg_ptr.cfm_ccm = (const struct cfm_ccm_t *)tptr; 322 if (cfm_common_header->first_tlv_offset < sizeof(*msg_ptr.cfm_ccm)) { 323 ND_PRINT((ndo, " (too small 1, must be >= %lu)", 324 (unsigned long) sizeof(*msg_ptr.cfm_ccm))); 325 return; 326 } 327 if (tlen < sizeof(*msg_ptr.cfm_ccm)) 328 goto tooshort; 329 ND_TCHECK(*msg_ptr.cfm_ccm); 330 331 ccm_interval = CFM_EXTRACT_CCM_INTERVAL(cfm_common_header->flags); 332 ND_PRINT((ndo, ", Flags [CCM Interval %u%s]", 333 ccm_interval, 334 cfm_common_header->flags & CFM_CCM_RDI_FLAG ? 335 ", RDI" : "")); 336 337 /* 338 * Resolve the CCM interval field. 339 */ 340 if (ccm_interval) { 341 ND_PRINT((ndo, "\n\t CCM Interval %.3fs" 342 ", min CCM Lifetime %.3fs, max CCM Lifetime %.3fs", 343 ccm_interval_base[ccm_interval], 344 ccm_interval_base[ccm_interval] * CCM_INTERVAL_MIN_MULTIPLIER, 345 ccm_interval_base[ccm_interval] * CCM_INTERVAL_MAX_MULTIPLIER)); 346 } 347 348 ND_PRINT((ndo, "\n\t Sequence Number 0x%08x, MA-End-Point-ID 0x%04x", 349 EXTRACT_32BITS(msg_ptr.cfm_ccm->sequence), 350 EXTRACT_16BITS(msg_ptr.cfm_ccm->ma_epi))); 351 352 namesp = msg_ptr.cfm_ccm->names; 353 names_data_remaining = sizeof(msg_ptr.cfm_ccm->names); 354 355 /* 356 * Resolve the MD fields. 357 */ 358 md_nameformat = *namesp; 359 namesp++; 360 names_data_remaining--; /* We know this is != 0 */ 361 if (md_nameformat != CFM_CCM_MD_FORMAT_NONE) { 362 md_namelength = *namesp; 363 namesp++; 364 names_data_remaining--; /* We know this is !=0 */ 365 ND_PRINT((ndo, "\n\t MD Name Format %s (%u), MD Name length %u", 366 tok2str(cfm_md_nameformat_values, "Unknown", 367 md_nameformat), 368 md_nameformat, 369 md_namelength)); 370 371 /* -2 for the MA short name format and length */ 372 if (md_namelength > names_data_remaining - 2) { 373 ND_PRINT((ndo, " (too large, must be <= %u)", names_data_remaining - 2)); 374 return; 375 } 376 377 md_name = namesp; 378 ND_PRINT((ndo, "\n\t MD Name: ")); 379 switch (md_nameformat) { 380 case CFM_CCM_MD_FORMAT_DNS: 381 case CFM_CCM_MD_FORMAT_CHAR: 382 safeputs(ndo, md_name, md_namelength); 383 break; 384 385 case CFM_CCM_MD_FORMAT_MAC: 386 if (md_namelength == 6) { 387 ND_PRINT((ndo, "\n\t MAC %s", etheraddr_string(ndo, 388 md_name))); 389 } else { 390 ND_PRINT((ndo, "\n\t MAC (length invalid)")); 391 } 392 break; 393 394 /* FIXME add printers for those MD formats - hexdump for now */ 395 case CFM_CCM_MA_FORMAT_8021: 396 default: 397 print_unknown_data(ndo, md_name, "\n\t ", 398 md_namelength); 399 } 400 namesp += md_namelength; 401 names_data_remaining -= md_namelength; 402 } else { 403 ND_PRINT((ndo, "\n\t MD Name Format %s (%u)", 404 tok2str(cfm_md_nameformat_values, "Unknown", 405 md_nameformat), 406 md_nameformat)); 407 } 408 409 410 /* 411 * Resolve the MA fields. 412 */ 413 ma_nameformat = *namesp; 414 namesp++; 415 names_data_remaining--; /* We know this is != 0 */ 416 ma_namelength = *namesp; 417 namesp++; 418 names_data_remaining--; /* We know this is != 0 */ 419 ND_PRINT((ndo, "\n\t MA Name-Format %s (%u), MA name length %u", 420 tok2str(cfm_ma_nameformat_values, "Unknown", 421 ma_nameformat), 422 ma_nameformat, 423 ma_namelength)); 424 425 if (ma_namelength > names_data_remaining) { 426 ND_PRINT((ndo, " (too large, must be <= %u)", names_data_remaining)); 427 return; 428 } 429 430 ma_name = namesp; 431 ND_PRINT((ndo, "\n\t MA Name: ")); 432 switch (ma_nameformat) { 433 case CFM_CCM_MA_FORMAT_CHAR: 434 safeputs(ndo, ma_name, ma_namelength); 435 break; 436 437 /* FIXME add printers for those MA formats - hexdump for now */ 438 case CFM_CCM_MA_FORMAT_8021: 439 case CFM_CCM_MA_FORMAT_VID: 440 case CFM_CCM_MA_FORMAT_INT: 441 case CFM_CCM_MA_FORMAT_VPN: 442 default: 443 print_unknown_data(ndo, ma_name, "\n\t ", ma_namelength); 444 } 445 break; 446 447 case CFM_OPCODE_LTM: 448 msg_ptr.cfm_ltm = (const struct cfm_ltm_t *)tptr; 449 if (cfm_common_header->first_tlv_offset < sizeof(*msg_ptr.cfm_ltm)) { 450 ND_PRINT((ndo, " (too small 4, must be >= %lu)", 451 (unsigned long) sizeof(*msg_ptr.cfm_ltm))); 452 return; 453 } 454 if (tlen < sizeof(*msg_ptr.cfm_ltm)) 455 goto tooshort; 456 ND_TCHECK(*msg_ptr.cfm_ltm); 457 458 ND_PRINT((ndo, ", Flags [%s]", 459 bittok2str(cfm_ltm_flag_values, "none", cfm_common_header->flags))); 460 461 ND_PRINT((ndo, "\n\t Transaction-ID 0x%08x, ttl %u", 462 EXTRACT_32BITS(msg_ptr.cfm_ltm->transaction_id), 463 msg_ptr.cfm_ltm->ttl)); 464 465 ND_PRINT((ndo, "\n\t Original-MAC %s, Target-MAC %s", 466 etheraddr_string(ndo, msg_ptr.cfm_ltm->original_mac), 467 etheraddr_string(ndo, msg_ptr.cfm_ltm->target_mac))); 468 break; 469 470 case CFM_OPCODE_LTR: 471 msg_ptr.cfm_ltr = (const struct cfm_ltr_t *)tptr; 472 if (cfm_common_header->first_tlv_offset < sizeof(*msg_ptr.cfm_ltr)) { 473 ND_PRINT((ndo, " (too small 5, must be >= %lu)", 474 (unsigned long) sizeof(*msg_ptr.cfm_ltr))); 475 return; 476 } 477 if (tlen < sizeof(*msg_ptr.cfm_ltr)) 478 goto tooshort; 479 ND_TCHECK(*msg_ptr.cfm_ltr); 480 481 ND_PRINT((ndo, ", Flags [%s]", 482 bittok2str(cfm_ltr_flag_values, "none", cfm_common_header->flags))); 483 484 ND_PRINT((ndo, "\n\t Transaction-ID 0x%08x, ttl %u", 485 EXTRACT_32BITS(msg_ptr.cfm_ltr->transaction_id), 486 msg_ptr.cfm_ltr->ttl)); 487 488 ND_PRINT((ndo, "\n\t Replay-Action %s (%u)", 489 tok2str(cfm_ltr_replay_action_values, 490 "Unknown", 491 msg_ptr.cfm_ltr->replay_action), 492 msg_ptr.cfm_ltr->replay_action)); 493 break; 494 495 /* 496 * No message decoder yet. 497 * Hexdump everything up until the start of the TLVs 498 */ 499 case CFM_OPCODE_LBR: 500 case CFM_OPCODE_LBM: 501 default: 502 print_unknown_data(ndo, tptr, "\n\t ", 503 tlen - cfm_common_header->first_tlv_offset); 504 break; 505 } 506 507 tptr += cfm_common_header->first_tlv_offset; 508 tlen -= cfm_common_header->first_tlv_offset; 509 510 while (tlen > 0) { 511 cfm_tlv_header = (const struct cfm_tlv_header_t *)tptr; 512 513 /* Enough to read the tlv type ? */ 514 ND_TCHECK2(*tptr, 1); 515 cfm_tlv_type=cfm_tlv_header->type; 516 517 ND_PRINT((ndo, "\n\t%s TLV (0x%02x)", 518 tok2str(cfm_tlv_values, "Unknown", cfm_tlv_type), 519 cfm_tlv_type)); 520 521 if (cfm_tlv_type == CFM_TLV_END) { 522 /* Length is "Not present if the Type field is 0." */ 523 return; 524 } 525 526 /* do we have the full tlv header ? */ 527 if (tlen < sizeof(struct cfm_tlv_header_t)) 528 goto tooshort; 529 ND_TCHECK2(*tptr, sizeof(struct cfm_tlv_header_t)); 530 cfm_tlv_len=EXTRACT_16BITS(&cfm_tlv_header->length); 531 532 ND_PRINT((ndo, ", length %u", cfm_tlv_len)); 533 534 tptr += sizeof(struct cfm_tlv_header_t); 535 tlen -= sizeof(struct cfm_tlv_header_t); 536 tlv_ptr = tptr; 537 538 /* do we have the full tlv ? */ 539 if (tlen < cfm_tlv_len) 540 goto tooshort; 541 ND_TCHECK2(*tptr, cfm_tlv_len); 542 hexdump = FALSE; 543 544 switch(cfm_tlv_type) { 545 case CFM_TLV_PORT_STATUS: 546 if (cfm_tlv_len < 1) { 547 ND_PRINT((ndo, " (too short, must be >= 1)")); 548 return; 549 } 550 ND_PRINT((ndo, ", Status: %s (%u)", 551 tok2str(cfm_tlv_port_status_values, "Unknown", *tptr), 552 *tptr)); 553 break; 554 555 case CFM_TLV_INTERFACE_STATUS: 556 if (cfm_tlv_len < 1) { 557 ND_PRINT((ndo, " (too short, must be >= 1)")); 558 return; 559 } 560 ND_PRINT((ndo, ", Status: %s (%u)", 561 tok2str(cfm_tlv_interface_status_values, "Unknown", *tptr), 562 *tptr)); 563 break; 564 565 case CFM_TLV_PRIVATE: 566 if (cfm_tlv_len < 4) { 567 ND_PRINT((ndo, " (too short, must be >= 4)")); 568 return; 569 } 570 ND_PRINT((ndo, ", Vendor: %s (%u), Sub-Type %u", 571 tok2str(oui_values,"Unknown", EXTRACT_24BITS(tptr)), 572 EXTRACT_24BITS(tptr), 573 *(tptr + 3))); 574 hexdump = TRUE; 575 break; 576 577 case CFM_TLV_SENDER_ID: 578 { 579 u_int chassis_id_type, chassis_id_length; 580 u_int mgmt_addr_length; 581 582 if (cfm_tlv_len < 1) { 583 ND_PRINT((ndo, " (too short, must be >= 1)")); 584 return; 585 } 586 587 /* 588 * Get the Chassis ID length and check it. 589 */ 590 chassis_id_length = *tptr; 591 tptr++; 592 tlen--; 593 cfm_tlv_len--; 594 595 if (chassis_id_length) { 596 if (cfm_tlv_len < 1) { 597 ND_PRINT((ndo, "\n\t (TLV too short)")); 598 return; 599 } 600 chassis_id_type = *tptr; 601 cfm_tlv_len--; 602 ND_PRINT((ndo, "\n\t Chassis-ID Type %s (%u), Chassis-ID length %u", 603 tok2str(cfm_tlv_senderid_chassisid_values, 604 "Unknown", 605 chassis_id_type), 606 chassis_id_type, 607 chassis_id_length)); 608 609 if (cfm_tlv_len < chassis_id_length) { 610 ND_PRINT((ndo, "\n\t (TLV too short)")); 611 return; 612 } 613 614 switch (chassis_id_type) { 615 case CFM_CHASSIS_ID_MAC_ADDRESS: 616 ND_PRINT((ndo, "\n\t MAC %s", etheraddr_string(ndo, tptr + 1))); 617 break; 618 619 case CFM_CHASSIS_ID_NETWORK_ADDRESS: 620 hexdump |= cfm_network_addr_print(ndo, tptr); 621 break; 622 623 case CFM_CHASSIS_ID_INTERFACE_NAME: /* fall through */ 624 case CFM_CHASSIS_ID_INTERFACE_ALIAS: 625 case CFM_CHASSIS_ID_LOCAL: 626 case CFM_CHASSIS_ID_CHASSIS_COMPONENT: 627 case CFM_CHASSIS_ID_PORT_COMPONENT: 628 safeputs(ndo, tptr + 1, chassis_id_length); 629 break; 630 631 default: 632 hexdump = TRUE; 633 break; 634 } 635 cfm_tlv_len -= chassis_id_length; 636 637 tptr += 1 + chassis_id_length; 638 tlen -= 1 + chassis_id_length; 639 } 640 641 /* 642 * Check if there is a Management Address. 643 */ 644 if (cfm_tlv_len == 0) { 645 /* No, there isn't; we're done. */ 646 return; 647 } 648 649 mgmt_addr_length = *tptr; 650 tptr++; 651 tlen--; 652 cfm_tlv_len--; 653 if (mgmt_addr_length) { 654 if (cfm_tlv_len < mgmt_addr_length) { 655 ND_PRINT((ndo, "\n\t (TLV too short)")); 656 return; 657 } 658 cfm_tlv_len -= mgmt_addr_length; 659 /* 660 * XXX - this is an OID; print it as such. 661 */ 662 tptr += mgmt_addr_length; 663 tlen -= mgmt_addr_length; 664 665 if (cfm_tlv_len < 1) { 666 ND_PRINT((ndo, "\n\t (TLV too short)")); 667 return; 668 } 669 670 mgmt_addr_length = *tptr; 671 tptr++; 672 tlen--; 673 cfm_tlv_len--; 674 if (mgmt_addr_length) { 675 if (cfm_tlv_len < mgmt_addr_length) { 676 ND_PRINT((ndo, "\n\t (TLV too short)")); 677 return; 678 } 679 cfm_tlv_len -= mgmt_addr_length; 680 /* 681 * XXX - this is a TransportDomain; print it as such. 682 */ 683 tptr += mgmt_addr_length; 684 tlen -= mgmt_addr_length; 685 } 686 } 687 break; 688 } 689 690 /* 691 * FIXME those are the defined TLVs that lack a decoder 692 * you are welcome to contribute code ;-) 693 */ 694 695 case CFM_TLV_DATA: 696 case CFM_TLV_REPLY_INGRESS: 697 case CFM_TLV_REPLY_EGRESS: 698 default: 699 hexdump = TRUE; 700 break; 701 } 702 /* do we want to see an additional hexdump ? */ 703 if (hexdump || ndo->ndo_vflag > 1) 704 print_unknown_data(ndo, tlv_ptr, "\n\t ", cfm_tlv_len); 705 706 tptr+=cfm_tlv_len; 707 tlen-=cfm_tlv_len; 708 } 709 return; 710 711 tooshort: 712 ND_PRINT((ndo, "\n\t\t packet is too short")); 713 return; 714 715 trunc: 716 ND_PRINT((ndo, "\n\t\t packet exceeded snapshot")); 717 } 718
