print-cfm.c revision 1.1.1.4
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 * Support for the IEEE Connectivity Fault Management Protocols as per 802.1ag. 16 * 17 * Original code by Hannes Gredler (hannes (at) juniper.net) 18 */ 19 20 #define NETDISSECT_REWORKED 21 #ifdef HAVE_CONFIG_H 22 #include "config.h" 23 #endif 24 25 #include <tcpdump-stdinc.h> 26 27 #include <stdio.h> 28 29 #include "interface.h" 30 #include "extract.h" 31 #include "ether.h" 32 #include "addrtoname.h" 33 #include "oui.h" 34 #include "af.h" 35 36 struct cfm_common_header_t { 37 uint8_t mdlevel_version; 38 uint8_t opcode; 39 uint8_t flags; 40 uint8_t first_tlv_offset; 41 }; 42 43 #define CFM_VERSION 0 44 #define CFM_EXTRACT_VERSION(x) (((x)&0x1f)) 45 #define CFM_EXTRACT_MD_LEVEL(x) (((x)&0xe0)>>5) 46 47 #define CFM_OPCODE_CCM 1 48 #define CFM_OPCODE_LBR 2 49 #define CFM_OPCODE_LBM 3 50 #define CFM_OPCODE_LTR 4 51 #define CFM_OPCODE_LTM 5 52 53 static const struct tok cfm_opcode_values[] = { 54 { CFM_OPCODE_CCM, "Continouity Check Message"}, 55 { CFM_OPCODE_LBR, "Loopback Reply"}, 56 { CFM_OPCODE_LBM, "Loopback Message"}, 57 { CFM_OPCODE_LTR, "Linktrace Reply"}, 58 { CFM_OPCODE_LTM, "Linktrace Message"}, 59 { 0, NULL} 60 }; 61 62 /* 63 * Message Formats. 64 */ 65 struct cfm_ccm_t { 66 uint8_t sequence[4]; 67 uint8_t ma_epi[2]; 68 uint8_t md_nameformat; 69 uint8_t md_namelength; 70 uint8_t md_name[46]; /* md name and short ma name */ 71 uint8_t reserved_itu[16]; 72 uint8_t reserved[6]; 73 }; 74 75 /* 76 * Timer Bases for the CCM Interval field. 77 * Expressed in units of seconds. 78 */ 79 const float ccm_interval_base[8] = {0, 0.003333, 0.01, 0.1, 1, 10, 60, 600}; 80 #define CCM_INTERVAL_MIN_MULTIPLIER 3.25 81 #define CCM_INTERVAL_MAX_MULTIPLIER 3.5 82 83 #define CFM_CCM_RDI_FLAG 0x80 84 #define CFM_EXTRACT_CCM_INTERVAL(x) (((x)&0x07)) 85 86 #define CFM_CCM_MD_FORMAT_8021 0 87 #define CFM_CCM_MD_FORMAT_NONE 1 88 #define CFM_CCM_MD_FORMAT_DNS 2 89 #define CFM_CCM_MD_FORMAT_MAC 3 90 #define CFM_CCM_MD_FORMAT_CHAR 4 91 92 static const struct tok cfm_md_nameformat_values[] = { 93 { CFM_CCM_MD_FORMAT_8021, "IEEE 802.1"}, 94 { CFM_CCM_MD_FORMAT_NONE, "No MD Name present"}, 95 { CFM_CCM_MD_FORMAT_DNS, "DNS string"}, 96 { CFM_CCM_MD_FORMAT_MAC, "MAC + 16Bit Integer"}, 97 { CFM_CCM_MD_FORMAT_CHAR, "Character string"}, 98 { 0, NULL} 99 }; 100 101 #define CFM_CCM_MA_FORMAT_8021 0 102 #define CFM_CCM_MA_FORMAT_VID 1 103 #define CFM_CCM_MA_FORMAT_CHAR 2 104 #define CFM_CCM_MA_FORMAT_INT 3 105 #define CFM_CCM_MA_FORMAT_VPN 4 106 107 static const struct tok cfm_ma_nameformat_values[] = { 108 { CFM_CCM_MA_FORMAT_8021, "IEEE 802.1"}, 109 { CFM_CCM_MA_FORMAT_VID, "Primary VID"}, 110 { CFM_CCM_MA_FORMAT_CHAR, "Character string"}, 111 { CFM_CCM_MA_FORMAT_INT, "16Bit Integer"}, 112 { CFM_CCM_MA_FORMAT_VPN, "RFC2685 VPN-ID"}, 113 { 0, NULL} 114 }; 115 116 struct cfm_lbm_t { 117 uint8_t transaction_id[4]; 118 uint8_t reserved[4]; 119 }; 120 121 struct cfm_ltm_t { 122 uint8_t transaction_id[4]; 123 uint8_t egress_id[8]; 124 uint8_t ttl; 125 uint8_t original_mac[ETHER_ADDR_LEN]; 126 uint8_t target_mac[ETHER_ADDR_LEN]; 127 uint8_t reserved[3]; 128 }; 129 130 static const struct tok cfm_ltm_flag_values[] = { 131 { 0x80, "Use Forwarding-DB only"}, 132 { 0, NULL} 133 }; 134 135 struct cfm_ltr_t { 136 uint8_t transaction_id[4]; 137 uint8_t last_egress_id[8]; 138 uint8_t next_egress_id[8]; 139 uint8_t ttl; 140 uint8_t replay_action; 141 uint8_t reserved[6]; 142 }; 143 144 static const struct tok cfm_ltr_flag_values[] = { 145 { 0x80, "UseFDB Only"}, 146 { 0x40, "FwdYes"}, 147 { 0x20, "Terminal MEP"}, 148 { 0, NULL} 149 }; 150 151 static const struct tok cfm_ltr_replay_action_values[] = { 152 { 1, "Exact Match"}, 153 { 2, "Filtering DB"}, 154 { 3, "MIP CCM DB"}, 155 { 0, NULL} 156 }; 157 158 159 #define CFM_TLV_END 0 160 #define CFM_TLV_SENDER_ID 1 161 #define CFM_TLV_PORT_STATUS 2 162 #define CFM_TLV_INTERFACE_STATUS 3 163 #define CFM_TLV_DATA 4 164 #define CFM_TLV_REPLY_INGRESS 5 165 #define CFM_TLV_REPLY_EGRESS 6 166 #define CFM_TLV_PRIVATE 31 167 168 static const struct tok cfm_tlv_values[] = { 169 { CFM_TLV_END, "End"}, 170 { CFM_TLV_SENDER_ID, "Sender ID"}, 171 { CFM_TLV_PORT_STATUS, "Port status"}, 172 { CFM_TLV_INTERFACE_STATUS, "Interface status"}, 173 { CFM_TLV_DATA, "Data"}, 174 { CFM_TLV_REPLY_INGRESS, "Reply Ingress"}, 175 { CFM_TLV_REPLY_EGRESS, "Reply Egress"}, 176 { CFM_TLV_PRIVATE, "Organization Specific"}, 177 { 0, NULL} 178 }; 179 180 /* 181 * TLVs 182 */ 183 184 struct cfm_tlv_header_t { 185 uint8_t type; 186 uint8_t length[2]; 187 }; 188 189 /* FIXME define TLV formats */ 190 191 static const struct tok cfm_tlv_port_status_values[] = { 192 { 1, "Blocked"}, 193 { 2, "Up"}, 194 { 0, NULL} 195 }; 196 197 static const struct tok cfm_tlv_interface_status_values[] = { 198 { 1, "Up"}, 199 { 2, "Down"}, 200 { 3, "Testing"}, 201 { 5, "Dormant"}, 202 { 6, "not present"}, 203 { 7, "lower Layer down"}, 204 { 0, NULL} 205 }; 206 207 #define CFM_CHASSIS_ID_CHASSIS_COMPONENT 1 208 #define CFM_CHASSIS_ID_INTERFACE_ALIAS 2 209 #define CFM_CHASSIS_ID_PORT_COMPONENT 3 210 #define CFM_CHASSIS_ID_MAC_ADDRESS 4 211 #define CFM_CHASSIS_ID_NETWORK_ADDRESS 5 212 #define CFM_CHASSIS_ID_INTERFACE_NAME 6 213 #define CFM_CHASSIS_ID_LOCAL 7 214 215 static const struct tok cfm_tlv_senderid_chassisid_values[] = { 216 { 0, "Reserved"}, 217 { CFM_CHASSIS_ID_CHASSIS_COMPONENT, "Chassis component"}, 218 { CFM_CHASSIS_ID_INTERFACE_ALIAS, "Interface alias"}, 219 { CFM_CHASSIS_ID_PORT_COMPONENT, "Port component"}, 220 { CFM_CHASSIS_ID_MAC_ADDRESS, "MAC address"}, 221 { CFM_CHASSIS_ID_NETWORK_ADDRESS, "Network address"}, 222 { CFM_CHASSIS_ID_INTERFACE_NAME, "Interface name"}, 223 { CFM_CHASSIS_ID_LOCAL, "Locally assigned"}, 224 { 0, NULL} 225 }; 226 227 228 static int 229 cfm_mgmt_addr_print(netdissect_options *ndo, 230 register const u_char *tptr) { 231 232 u_int mgmt_addr_type; 233 u_int hexdump = FALSE; 234 235 /* 236 * Altough AFIs are tpically 2 octects wide, 237 * 802.1ab specifies that this field width 238 * is only once octet 239 */ 240 mgmt_addr_type = *tptr; 241 ND_PRINT((ndo, "\n\t Management Address Type %s (%u)", 242 tok2str(af_values, "Unknown", mgmt_addr_type), 243 mgmt_addr_type)); 244 245 /* 246 * Resolve the passed in Address. 247 */ 248 switch(mgmt_addr_type) { 249 case AFNUM_INET: 250 ND_PRINT((ndo, ", %s", ipaddr_string(ndo, tptr + 1))); 251 break; 252 253 #ifdef INET6 254 case AFNUM_INET6: 255 ND_PRINT((ndo, ", %s", ip6addr_string(ndo, tptr + 1))); 256 break; 257 #endif 258 259 default: 260 hexdump = TRUE; 261 break; 262 } 263 264 return hexdump; 265 } 266 267 /* 268 * The egress-ID string is a 16-Bit string plus a MAC address. 269 */ 270 static const char * 271 cfm_egress_id_string(netdissect_options *ndo, register const u_char *tptr) { 272 static char egress_id_buffer[80]; 273 274 snprintf(egress_id_buffer, sizeof(egress_id_buffer), 275 "MAC 0x%4x-%s", 276 EXTRACT_16BITS(tptr), 277 etheraddr_string(ndo, tptr+2)); 278 279 return egress_id_buffer; 280 } 281 282 void 283 cfm_print(netdissect_options *ndo, 284 register const u_char *pptr, register u_int length) { 285 286 const struct cfm_common_header_t *cfm_common_header; 287 const struct cfm_tlv_header_t *cfm_tlv_header; 288 const uint8_t *tptr, *tlv_ptr, *ma_name, *ma_nameformat, *ma_namelength; 289 u_int hexdump, tlen, cfm_tlv_len, cfm_tlv_type, ccm_interval; 290 291 292 union { 293 const struct cfm_ccm_t *cfm_ccm; 294 const struct cfm_lbm_t *cfm_lbm; 295 const struct cfm_ltm_t *cfm_ltm; 296 const struct cfm_ltr_t *cfm_ltr; 297 } msg_ptr; 298 299 tptr=pptr; 300 cfm_common_header = (const struct cfm_common_header_t *)pptr; 301 ND_TCHECK(*cfm_common_header); 302 303 /* 304 * Sanity checking of the header. 305 */ 306 if (CFM_EXTRACT_VERSION(cfm_common_header->mdlevel_version) != CFM_VERSION) { 307 ND_PRINT((ndo, "CFMv%u not supported, length %u", 308 CFM_EXTRACT_VERSION(cfm_common_header->mdlevel_version), length)); 309 return; 310 } 311 312 ND_PRINT((ndo, "CFMv%u %s, MD Level %u, length %u", 313 CFM_EXTRACT_VERSION(cfm_common_header->mdlevel_version), 314 tok2str(cfm_opcode_values, "unknown (%u)", cfm_common_header->opcode), 315 CFM_EXTRACT_MD_LEVEL(cfm_common_header->mdlevel_version), 316 length)); 317 318 /* 319 * In non-verbose mode just print the opcode and md-level. 320 */ 321 if (ndo->ndo_vflag < 1) { 322 return; 323 } 324 325 ND_PRINT((ndo, "\n\tFirst TLV offset %u", cfm_common_header->first_tlv_offset)); 326 327 tptr += sizeof(const struct cfm_common_header_t); 328 tlen = length - sizeof(struct cfm_common_header_t); 329 330 switch (cfm_common_header->opcode) { 331 case CFM_OPCODE_CCM: 332 msg_ptr.cfm_ccm = (const struct cfm_ccm_t *)tptr; 333 334 ccm_interval = CFM_EXTRACT_CCM_INTERVAL(cfm_common_header->flags); 335 ND_PRINT((ndo, ", Flags [CCM Interval %u%s]", 336 ccm_interval, 337 cfm_common_header->flags & CFM_CCM_RDI_FLAG ? 338 ", RDI" : "")); 339 340 /* 341 * Resolve the CCM interval field. 342 */ 343 if (ccm_interval) { 344 ND_PRINT((ndo, "\n\t CCM Interval %.3fs" 345 ", min CCM Lifetime %.3fs, max CCM Lifetime %.3fs", 346 ccm_interval_base[ccm_interval], 347 ccm_interval_base[ccm_interval] * CCM_INTERVAL_MIN_MULTIPLIER, 348 ccm_interval_base[ccm_interval] * CCM_INTERVAL_MAX_MULTIPLIER)); 349 } 350 351 ND_PRINT((ndo, "\n\t Sequence Number 0x%08x, MA-End-Point-ID 0x%04x", 352 EXTRACT_32BITS(msg_ptr.cfm_ccm->sequence), 353 EXTRACT_16BITS(msg_ptr.cfm_ccm->ma_epi))); 354 355 356 /* 357 * Resolve the MD fields. 358 */ 359 ND_PRINT((ndo, "\n\t MD Name Format %s (%u), MD Name length %u", 360 tok2str(cfm_md_nameformat_values, "Unknown", 361 msg_ptr.cfm_ccm->md_nameformat), 362 msg_ptr.cfm_ccm->md_nameformat, 363 msg_ptr.cfm_ccm->md_namelength)); 364 365 if (msg_ptr.cfm_ccm->md_nameformat != CFM_CCM_MD_FORMAT_NONE) { 366 ND_PRINT((ndo, "\n\t MD Name: ")); 367 switch (msg_ptr.cfm_ccm->md_nameformat) { 368 case CFM_CCM_MD_FORMAT_DNS: 369 case CFM_CCM_MD_FORMAT_CHAR: 370 safeputs(ndo, msg_ptr.cfm_ccm->md_name, msg_ptr.cfm_ccm->md_namelength); 371 break; 372 373 case CFM_CCM_MD_FORMAT_MAC: 374 ND_PRINT((ndo, "\n\t MAC %s", etheraddr_string(ndo, 375 msg_ptr.cfm_ccm->md_name))); 376 break; 377 378 /* FIXME add printers for those MD formats - hexdump for now */ 379 case CFM_CCM_MA_FORMAT_8021: 380 default: 381 print_unknown_data(ndo, msg_ptr.cfm_ccm->md_name, "\n\t ", 382 msg_ptr.cfm_ccm->md_namelength); 383 } 384 } 385 386 387 /* 388 * Resolve the MA fields. 389 */ 390 ma_nameformat = msg_ptr.cfm_ccm->md_name + msg_ptr.cfm_ccm->md_namelength; 391 ma_namelength = msg_ptr.cfm_ccm->md_name + msg_ptr.cfm_ccm->md_namelength + 1; 392 ma_name = msg_ptr.cfm_ccm->md_name + msg_ptr.cfm_ccm->md_namelength + 2; 393 394 ND_PRINT((ndo, "\n\t MA Name-Format %s (%u), MA name length %u", 395 tok2str(cfm_ma_nameformat_values, "Unknown", 396 *ma_nameformat), 397 *ma_nameformat, 398 *ma_namelength)); 399 400 ND_PRINT((ndo, "\n\t MA Name: ")); 401 switch (*ma_nameformat) { 402 case CFM_CCM_MA_FORMAT_CHAR: 403 safeputs(ndo, ma_name, *ma_namelength); 404 break; 405 406 /* FIXME add printers for those MA formats - hexdump for now */ 407 case CFM_CCM_MA_FORMAT_8021: 408 case CFM_CCM_MA_FORMAT_VID: 409 case CFM_CCM_MA_FORMAT_INT: 410 case CFM_CCM_MA_FORMAT_VPN: 411 default: 412 print_unknown_data(ndo, ma_name, "\n\t ", *ma_namelength); 413 } 414 break; 415 416 case CFM_OPCODE_LTM: 417 msg_ptr.cfm_ltm = (const struct cfm_ltm_t *)tptr; 418 419 ND_PRINT((ndo, ", Flags [%s]", 420 bittok2str(cfm_ltm_flag_values, "none", cfm_common_header->flags))); 421 422 ND_PRINT((ndo, "\n\t Transaction-ID 0x%08x, Egress-ID %s, ttl %u", 423 EXTRACT_32BITS(msg_ptr.cfm_ltm->transaction_id), 424 cfm_egress_id_string(ndo, msg_ptr.cfm_ltm->egress_id), 425 msg_ptr.cfm_ltm->ttl)); 426 427 ND_PRINT((ndo, "\n\t Original-MAC %s, Target-MAC %s", 428 etheraddr_string(ndo, msg_ptr.cfm_ltm->original_mac), 429 etheraddr_string(ndo, msg_ptr.cfm_ltm->target_mac))); 430 break; 431 432 case CFM_OPCODE_LTR: 433 msg_ptr.cfm_ltr = (const struct cfm_ltr_t *)tptr; 434 435 ND_PRINT((ndo, ", Flags [%s]", 436 bittok2str(cfm_ltr_flag_values, "none", cfm_common_header->flags))); 437 438 ND_PRINT((ndo, "\n\t Transaction-ID 0x%08x, Last-Egress-ID %s", 439 EXTRACT_32BITS(msg_ptr.cfm_ltr->transaction_id), 440 cfm_egress_id_string(ndo, msg_ptr.cfm_ltr->last_egress_id))); 441 442 ND_PRINT((ndo, "\n\t Next-Egress-ID %s, ttl %u", 443 cfm_egress_id_string(ndo, msg_ptr.cfm_ltr->next_egress_id), 444 msg_ptr.cfm_ltr->ttl)); 445 446 ND_PRINT((ndo, "\n\t Replay-Action %s (%u)", 447 tok2str(cfm_ltr_replay_action_values, 448 "Unknown", 449 msg_ptr.cfm_ltr->replay_action), 450 msg_ptr.cfm_ltr->replay_action)); 451 break; 452 453 /* 454 * No message decoder yet. 455 * Hexdump everything up until the start of the TLVs 456 */ 457 case CFM_OPCODE_LBR: 458 case CFM_OPCODE_LBM: 459 default: 460 if (tlen > cfm_common_header->first_tlv_offset) { 461 print_unknown_data(ndo, tptr, "\n\t ", 462 tlen - cfm_common_header->first_tlv_offset); 463 } 464 break; 465 } 466 467 /* 468 * Sanity check for not walking off. 469 */ 470 if (tlen <= cfm_common_header->first_tlv_offset) { 471 return; 472 } 473 474 tptr += cfm_common_header->first_tlv_offset; 475 tlen -= cfm_common_header->first_tlv_offset; 476 477 while (tlen > 0) { 478 cfm_tlv_header = (const struct cfm_tlv_header_t *)tptr; 479 480 /* Enough to read the tlv type ? */ 481 ND_TCHECK2(*tptr, 1); 482 cfm_tlv_type=cfm_tlv_header->type; 483 484 if (cfm_tlv_type != CFM_TLV_END) { 485 /* did we capture enough for fully decoding the object header ? */ 486 ND_TCHECK2(*tptr, sizeof(struct cfm_tlv_header_t)); 487 cfm_tlv_len=EXTRACT_16BITS(&cfm_tlv_header->length); 488 } else { 489 cfm_tlv_len = 0; 490 } 491 492 ND_PRINT((ndo, "\n\t%s TLV (0x%02x), length %u", 493 tok2str(cfm_tlv_values, "Unknown", cfm_tlv_type), 494 cfm_tlv_type, 495 cfm_tlv_len)); 496 497 /* sanity check for not walking off and infinite loop check. */ 498 if ((cfm_tlv_type != CFM_TLV_END) && 499 ((cfm_tlv_len + sizeof(struct cfm_tlv_header_t) > tlen) || 500 (!cfm_tlv_len))) { 501 print_unknown_data(ndo, tptr, "\n\t ", tlen); 502 return; 503 } 504 505 tptr += sizeof(struct cfm_tlv_header_t); 506 tlen -= sizeof(struct cfm_tlv_header_t); 507 tlv_ptr = tptr; 508 509 /* did we capture enough for fully decoding the object ? */ 510 if (cfm_tlv_type != CFM_TLV_END) { 511 ND_TCHECK2(*tptr, cfm_tlv_len); 512 } 513 hexdump = FALSE; 514 515 switch(cfm_tlv_type) { 516 case CFM_TLV_END: 517 /* we are done - bail out */ 518 return; 519 520 case CFM_TLV_PORT_STATUS: 521 ND_PRINT((ndo, ", Status: %s (%u)", 522 tok2str(cfm_tlv_port_status_values, "Unknown", *tptr), 523 *tptr)); 524 break; 525 526 case CFM_TLV_INTERFACE_STATUS: 527 ND_PRINT((ndo, ", Status: %s (%u)", 528 tok2str(cfm_tlv_interface_status_values, "Unknown", *tptr), 529 *tptr)); 530 break; 531 532 case CFM_TLV_PRIVATE: 533 ND_PRINT((ndo, ", Vendor: %s (%u), Sub-Type %u", 534 tok2str(oui_values,"Unknown", EXTRACT_24BITS(tptr)), 535 EXTRACT_24BITS(tptr), 536 *(tptr + 3))); 537 hexdump = TRUE; 538 break; 539 540 case CFM_TLV_SENDER_ID: 541 { 542 u_int chassis_id_type, chassis_id_length; 543 u_int mgmt_addr_length; 544 545 /* 546 * Check if there is a Chassis-ID. 547 */ 548 chassis_id_length = *tptr; 549 if (chassis_id_length > tlen) { 550 hexdump = TRUE; 551 break; 552 } 553 554 tptr++; 555 tlen--; 556 557 if (chassis_id_length) { 558 chassis_id_type = *tptr; 559 ND_PRINT((ndo, "\n\t Chassis-ID Type %s (%u), Chassis-ID length %u", 560 tok2str(cfm_tlv_senderid_chassisid_values, 561 "Unknown", 562 chassis_id_type), 563 chassis_id_type, 564 chassis_id_length)); 565 566 switch (chassis_id_type) { 567 case CFM_CHASSIS_ID_MAC_ADDRESS: 568 ND_PRINT((ndo, "\n\t MAC %s", etheraddr_string(ndo, tptr + 1))); 569 break; 570 571 case CFM_CHASSIS_ID_NETWORK_ADDRESS: 572 hexdump |= cfm_mgmt_addr_print(ndo, tptr); 573 break; 574 575 case CFM_CHASSIS_ID_INTERFACE_NAME: /* fall through */ 576 case CFM_CHASSIS_ID_INTERFACE_ALIAS: 577 case CFM_CHASSIS_ID_LOCAL: 578 case CFM_CHASSIS_ID_CHASSIS_COMPONENT: 579 case CFM_CHASSIS_ID_PORT_COMPONENT: 580 safeputs(ndo, tptr + 1, chassis_id_length); 581 break; 582 583 default: 584 hexdump = TRUE; 585 break; 586 } 587 } 588 589 tptr += chassis_id_length; 590 tlen -= chassis_id_length; 591 592 /* 593 * Check if there is a Management Address. 594 */ 595 mgmt_addr_length = *tptr; 596 if (mgmt_addr_length > tlen) { 597 hexdump = TRUE; 598 break; 599 } 600 601 tptr++; 602 tlen--; 603 604 if (mgmt_addr_length) { 605 hexdump |= cfm_mgmt_addr_print(ndo, tptr); 606 } 607 608 tptr += mgmt_addr_length; 609 tlen -= mgmt_addr_length; 610 611 } 612 break; 613 614 /* 615 * FIXME those are the defined TLVs that lack a decoder 616 * you are welcome to contribute code ;-) 617 */ 618 619 case CFM_TLV_DATA: 620 case CFM_TLV_REPLY_INGRESS: 621 case CFM_TLV_REPLY_EGRESS: 622 default: 623 hexdump = TRUE; 624 break; 625 } 626 /* do we want to see an additional hexdump ? */ 627 if (hexdump || ndo->ndo_vflag > 1) 628 print_unknown_data(ndo, tlv_ptr, "\n\t ", cfm_tlv_len); 629 630 tptr+=cfm_tlv_len; 631 tlen-=cfm_tlv_len; 632 } 633 return; 634 trunc: 635 ND_PRINT((ndo, "\n\t\t packet exceeded snapshot")); 636 } 637
Indexes created Wed Aug 19 00:25:20 UTC 2026