JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 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@juniper.net) |
| 18 | */ |
| 19 | |
| 20 | #ifndef lint |
| 21 | static const char rcsid[] _U_ = |
| 22 | "@(#) $Header: /tcpdump/master/tcpdump/print-cfm.c,v 1.5 2007-07-24 16:01:42 hannes Exp $"; |
| 23 | #endif |
| 24 | |
| 25 | #ifdef HAVE_CONFIG_H |
| 26 | #include "config.h" |
| 27 | #endif |
| 28 | |
| 29 | #include <tcpdump-stdinc.h> |
| 30 | |
| 31 | #include <stdio.h> |
| 32 | #include <stdlib.h> |
| 33 | #include <string.h> |
| 34 | |
| 35 | #include "interface.h" |
| 36 | #include "extract.h" |
| 37 | #include "ether.h" |
| 38 | #include "addrtoname.h" |
| 39 | #include "oui.h" |
| 40 | #include "af.h" |
| 41 | |
| 42 | /* |
| 43 | * Prototypes |
| 44 | */ |
| 45 | const char * cfm_egress_id_string(register const u_char *); |
| 46 | int cfm_mgmt_addr_print(register const u_char *); |
| 47 | |
| 48 | struct cfm_common_header_t { |
| 49 | u_int8_t mdlevel_version; |
| 50 | u_int8_t opcode; |
| 51 | u_int8_t flags; |
| 52 | u_int8_t first_tlv_offset; |
| 53 | }; |
| 54 | |
| 55 | #define CFM_VERSION 0 |
| 56 | #define CFM_EXTRACT_VERSION(x) (((x)&0x1f)) |
| 57 | #define CFM_EXTRACT_MD_LEVEL(x) (((x)&0xe0)>>5) |
| 58 | |
| 59 | #define CFM_OPCODE_CCM 1 |
| 60 | #define CFM_OPCODE_LBR 2 |
| 61 | #define CFM_OPCODE_LBM 3 |
| 62 | #define CFM_OPCODE_LTR 4 |
| 63 | #define CFM_OPCODE_LTM 5 |
| 64 | |
| 65 | static const struct tok cfm_opcode_values[] = { |
| 66 | { CFM_OPCODE_CCM, "Continouity Check Message"}, |
| 67 | { CFM_OPCODE_LBR, "Loopback Reply"}, |
| 68 | { CFM_OPCODE_LBM, "Loopback Message"}, |
| 69 | { CFM_OPCODE_LTR, "Linktrace Reply"}, |
| 70 | { CFM_OPCODE_LTM, "Linktrace Message"}, |
| 71 | { 0, NULL} |
| 72 | }; |
| 73 | |
| 74 | /* |
| 75 | * Message Formats. |
| 76 | */ |
| 77 | struct cfm_ccm_t { |
| 78 | u_int8_t sequence[4]; |
| 79 | u_int8_t ma_epi[2]; |
| 80 | u_int8_t md_nameformat; |
| 81 | u_int8_t md_namelength; |
| 82 | u_int8_t md_name[46]; /* md name and short ma name */ |
| 83 | u_int8_t reserved_itu[16]; |
| 84 | u_int8_t reserved[6]; |
| 85 | }; |
| 86 | |
| 87 | /* |
| 88 | * Timer Bases for the CCM Interval field. |
| 89 | * Expressed in units of seconds. |
| 90 | */ |
| 91 | const float ccm_interval_base[8] = {0, 0.003333, 0.01, 0.1, 1, 10, 60, 600}; |
| 92 | #define CCM_INTERVAL_MIN_MULTIPLIER 3.25 |
| 93 | #define CCM_INTERVAL_MAX_MULTIPLIER 3.5 |
| 94 | |
| 95 | #define CFM_CCM_RDI_FLAG 0x80 |
| 96 | #define CFM_EXTRACT_CCM_INTERVAL(x) (((x)&0x07)) |
| 97 | |
| 98 | #define CFM_CCM_MD_FORMAT_8021 0 |
| 99 | #define CFM_CCM_MD_FORMAT_NONE 1 |
| 100 | #define CFM_CCM_MD_FORMAT_DNS 2 |
| 101 | #define CFM_CCM_MD_FORMAT_MAC 3 |
| 102 | #define CFM_CCM_MD_FORMAT_CHAR 4 |
| 103 | |
| 104 | static const struct tok cfm_md_nameformat_values[] = { |
| 105 | { CFM_CCM_MD_FORMAT_8021, "IEEE 802.1"}, |
| 106 | { CFM_CCM_MD_FORMAT_NONE, "No MD Name present"}, |
| 107 | { CFM_CCM_MD_FORMAT_DNS, "DNS string"}, |
| 108 | { CFM_CCM_MD_FORMAT_MAC, "MAC + 16Bit Integer"}, |
| 109 | { CFM_CCM_MD_FORMAT_CHAR, "Character string"}, |
| 110 | { 0, NULL} |
| 111 | }; |
| 112 | |
| 113 | #define CFM_CCM_MA_FORMAT_8021 0 |
| 114 | #define CFM_CCM_MA_FORMAT_VID 1 |
| 115 | #define CFM_CCM_MA_FORMAT_CHAR 2 |
| 116 | #define CFM_CCM_MA_FORMAT_INT 3 |
| 117 | #define CFM_CCM_MA_FORMAT_VPN 4 |
| 118 | |
| 119 | static const struct tok cfm_ma_nameformat_values[] = { |
| 120 | { CFM_CCM_MA_FORMAT_8021, "IEEE 802.1"}, |
| 121 | { CFM_CCM_MA_FORMAT_VID, "Primary VID"}, |
| 122 | { CFM_CCM_MA_FORMAT_CHAR, "Character string"}, |
| 123 | { CFM_CCM_MA_FORMAT_INT, "16Bit Integer"}, |
| 124 | { CFM_CCM_MA_FORMAT_VPN, "RFC2685 VPN-ID"}, |
| 125 | { 0, NULL} |
| 126 | }; |
| 127 | |
| 128 | struct cfm_lbm_t { |
| 129 | u_int8_t transaction_id[4]; |
| 130 | u_int8_t reserved[4]; |
| 131 | }; |
| 132 | |
| 133 | struct cfm_ltm_t { |
| 134 | u_int8_t transaction_id[4]; |
| 135 | u_int8_t egress_id[8]; |
| 136 | u_int8_t ttl; |
| 137 | u_int8_t original_mac[ETHER_ADDR_LEN]; |
| 138 | u_int8_t target_mac[ETHER_ADDR_LEN]; |
| 139 | u_int8_t reserved[3]; |
| 140 | }; |
| 141 | |
| 142 | static const struct tok cfm_ltm_flag_values[] = { |
| 143 | { 0x80, "Use Forwarding-DB only"}, |
| 144 | { 0, NULL} |
| 145 | }; |
| 146 | |
| 147 | struct cfm_ltr_t { |
| 148 | u_int8_t transaction_id[4]; |
| 149 | u_int8_t last_egress_id[8]; |
| 150 | u_int8_t next_egress_id[8]; |
| 151 | u_int8_t ttl; |
| 152 | u_int8_t replay_action; |
| 153 | u_int8_t reserved[6]; |
| 154 | }; |
| 155 | |
| 156 | static const struct tok cfm_ltr_flag_values[] = { |
| 157 | { 0x80, "Forwarded"}, |
| 158 | { 0x40, "Terminal MEP"}, |
| 159 | { 0, NULL} |
| 160 | }; |
| 161 | |
| 162 | static const struct tok cfm_ltr_replay_action_values[] = { |
| 163 | { 1, "Exact Match"}, |
| 164 | { 2, "Filtering DB"}, |
| 165 | { 3, "MIP CCM DB"}, |
| 166 | { 0, NULL} |
| 167 | }; |
| 168 | |
| 169 | |
| 170 | #define CFM_TLV_END 0 |
| 171 | #define CFM_TLV_SENDER_ID 1 |
| 172 | #define CFM_TLV_PORT_STATUS 2 |
| 173 | #define CFM_TLV_INTERFACE_STATUS 3 |
| 174 | #define CFM_TLV_DATA 4 |
| 175 | #define CFM_TLV_REPLY_INGRESS 5 |
| 176 | #define CFM_TLV_REPLY_EGRESS 6 |
| 177 | #define CFM_TLV_PRIVATE 31 |
| 178 | |
| 179 | static const struct tok cfm_tlv_values[] = { |
| 180 | { CFM_TLV_END, "End"}, |
| 181 | { CFM_TLV_SENDER_ID, "Sender ID"}, |
| 182 | { CFM_TLV_PORT_STATUS, "Port status"}, |
| 183 | { CFM_TLV_INTERFACE_STATUS, "Interface status"}, |
| 184 | { CFM_TLV_DATA, "Data"}, |
| 185 | { CFM_TLV_REPLY_INGRESS, "Reply Ingress"}, |
| 186 | { CFM_TLV_REPLY_EGRESS, "Reply Egress"}, |
| 187 | { CFM_TLV_PRIVATE, "Organization Specific"}, |
| 188 | { 0, NULL} |
| 189 | }; |
| 190 | |
| 191 | /* |
| 192 | * TLVs |
| 193 | */ |
| 194 | |
| 195 | struct cfm_tlv_header_t { |
| 196 | u_int8_t type; |
| 197 | u_int8_t length[2]; |
| 198 | }; |
| 199 | |
| 200 | /* FIXME define TLV formats */ |
| 201 | |
| 202 | static const struct tok cfm_tlv_port_status_values[] = { |
| 203 | { 1, "Blocked"}, |
| 204 | { 2, "Up"}, |
| 205 | { 0, NULL} |
| 206 | }; |
| 207 | |
| 208 | static const struct tok cfm_tlv_interface_status_values[] = { |
| 209 | { 1, "Up"}, |
| 210 | { 2, "Down"}, |
| 211 | { 3, "Testing"}, |
| 212 | { 5, "Dormant"}, |
| 213 | { 6, "not present"}, |
| 214 | { 7, "lower Layer down"}, |
| 215 | { 0, NULL} |
| 216 | }; |
| 217 | |
| 218 | #define CFM_CHASSIS_ID_CHASSIS_COMPONENT 1 |
| 219 | #define CFM_CHASSIS_ID_INTERFACE_ALIAS 2 |
| 220 | #define CFM_CHASSIS_ID_PORT_COMPONENT 3 |
| 221 | #define CFM_CHASSIS_ID_MAC_ADDRESS 4 |
| 222 | #define CFM_CHASSIS_ID_NETWORK_ADDRESS 5 |
| 223 | #define CFM_CHASSIS_ID_INTERFACE_NAME 6 |
| 224 | #define CFM_CHASSIS_ID_LOCAL 7 |
| 225 | |
| 226 | static const struct tok cfm_tlv_senderid_chassisid_values[] = { |
| 227 | { 0, "Reserved"}, |
| 228 | { CFM_CHASSIS_ID_CHASSIS_COMPONENT, "Chassis component"}, |
| 229 | { CFM_CHASSIS_ID_INTERFACE_ALIAS, "Interface alias"}, |
| 230 | { CFM_CHASSIS_ID_PORT_COMPONENT, "Port component"}, |
| 231 | { CFM_CHASSIS_ID_MAC_ADDRESS, "MAC address"}, |
| 232 | { CFM_CHASSIS_ID_NETWORK_ADDRESS, "Network address"}, |
| 233 | { CFM_CHASSIS_ID_INTERFACE_NAME, "Interface name"}, |
| 234 | { CFM_CHASSIS_ID_LOCAL, "Locally assigned"}, |
| 235 | { 0, NULL} |
| 236 | }; |
| 237 | |
| 238 | |
| 239 | int |
| 240 | cfm_mgmt_addr_print(register const u_char *tptr) { |
| 241 | |
| 242 | u_int mgmt_addr_type; |
| 243 | u_int hexdump = FALSE; |
| 244 | |
| 245 | /* |
| 246 | * Altough AFIs are tpically 2 octects wide, |
| 247 | * 802.1ab specifies that this field width |
| 248 | * is only once octet |
| 249 | */ |
| 250 | mgmt_addr_type = *tptr; |
| 251 | printf("\n\t Management Address Type %s (%u)", |
| 252 | tok2str(af_values, "Unknown", mgmt_addr_type), |
| 253 | mgmt_addr_type); |
| 254 | |
| 255 | /* |
| 256 | * Resolve the passed in Address. |
| 257 | */ |
| 258 | switch(mgmt_addr_type) { |
| 259 | case AFNUM_INET: |
| 260 | printf(", %s", ipaddr_string(tptr + 1)); |
| 261 | break; |
| 262 | |
| 263 | #ifdef INET6 |
| 264 | case AFNUM_INET6: |
| 265 | printf(", %s", ip6addr_string(tptr + 1)); |
| 266 | break; |
| 267 | #endif |
| 268 | |
| 269 | default: |
| 270 | hexdump = TRUE; |
| 271 | break; |
| 272 | } |
| 273 | |
| 274 | return hexdump; |
| 275 | } |
| 276 | |
| 277 | /* |
| 278 | * The egress-ID string is a 16-Bit string plus a MAC address. |
| 279 | */ |
| 280 | const char * |
| 281 | cfm_egress_id_string(register const u_char *tptr) { |
| 282 | static char egress_id_buffer[80]; |
| 283 | |
| 284 | snprintf(egress_id_buffer, sizeof(egress_id_buffer), |
| 285 | "MAC 0x%4x-%s", |
| 286 | EXTRACT_16BITS(tptr), |
| 287 | etheraddr_string(tptr+2)); |
| 288 | |
| 289 | return egress_id_buffer; |
| 290 | } |
| 291 | |
| 292 | void |
| 293 | cfm_print(register const u_char *pptr, register u_int length) { |
| 294 | |
| 295 | const struct cfm_common_header_t *cfm_common_header; |
| 296 | const struct cfm_tlv_header_t *cfm_tlv_header; |
| 297 | const u_int8_t *tptr, *tlv_ptr, *ma_name, *ma_nameformat, *ma_namelength; |
| 298 | u_int hexdump, tlen, cfm_tlv_len, cfm_tlv_type, ccm_interval; |
| 299 | |
| 300 | |
| 301 | union { |
| 302 | const struct cfm_ccm_t *cfm_ccm; |
| 303 | const struct cfm_lbm_t *cfm_lbm; |
| 304 | const struct cfm_ltm_t *cfm_ltm; |
| 305 | const struct cfm_ltr_t *cfm_ltr; |
| 306 | } msg_ptr; |
| 307 | |
| 308 | tptr=pptr; |
| 309 | cfm_common_header = (const struct cfm_common_header_t *)pptr; |
| 310 | TCHECK(*cfm_common_header); |
| 311 | |
| 312 | /* |
| 313 | * Sanity checking of the header. |
| 314 | */ |
| 315 | if (CFM_EXTRACT_VERSION(cfm_common_header->mdlevel_version) != CFM_VERSION) { |
| 316 | printf("CFMv%u not supported, length %u", |
| 317 | CFM_EXTRACT_VERSION(cfm_common_header->mdlevel_version), length); |
| 318 | return; |
| 319 | } |
| 320 | |
| 321 | printf("CFMv%u %s, MD Level %u, length %u", |
| 322 | CFM_EXTRACT_VERSION(cfm_common_header->mdlevel_version), |
| 323 | tok2str(cfm_opcode_values, "unknown (%u)", cfm_common_header->opcode), |
| 324 | CFM_EXTRACT_MD_LEVEL(cfm_common_header->mdlevel_version), |
| 325 | length); |
| 326 | |
| 327 | /* |
| 328 | * In non-verbose mode just print the opcode and md-level. |
| 329 | */ |
| 330 | if (vflag < 1) { |
| 331 | return; |
| 332 | } |
| 333 | |
| 334 | printf("\n\tFirst TLV offset %u", cfm_common_header->first_tlv_offset); |
| 335 | |
| 336 | tptr += sizeof(const struct cfm_common_header_t); |
| 337 | tlen = length - sizeof(struct cfm_common_header_t); |
| 338 | |
| 339 | switch (cfm_common_header->opcode) { |
| 340 | case CFM_OPCODE_CCM: |
| 341 | msg_ptr.cfm_ccm = (const struct cfm_ccm_t *)tptr; |
| 342 | |
| 343 | ccm_interval = CFM_EXTRACT_CCM_INTERVAL(cfm_common_header->flags); |
| 344 | printf(", Flags [CCM Interval %u%s]", |
| 345 | ccm_interval, |
| 346 | cfm_common_header->flags & CFM_CCM_RDI_FLAG ? |
| 347 | ", RDI" : ""); |
| 348 | |
| 349 | /* |
| 350 | * Resolve the CCM interval field. |
| 351 | */ |
| 352 | if (ccm_interval) { |
| 353 | printf("\n\t CCM Interval %.3fs" |
| 354 | ", min CCM Lifetime %.3fs, max CCM Lifetime %.3fs", |
| 355 | ccm_interval_base[ccm_interval], |
| 356 | ccm_interval_base[ccm_interval] * CCM_INTERVAL_MIN_MULTIPLIER, |
| 357 | ccm_interval_base[ccm_interval] * CCM_INTERVAL_MAX_MULTIPLIER); |
| 358 | } |
| 359 | |
| 360 | printf("\n\t Sequence Number 0x%08x, MA-End-Point-ID 0x%04x", |
| 361 | EXTRACT_32BITS(msg_ptr.cfm_ccm->sequence), |
| 362 | EXTRACT_16BITS(msg_ptr.cfm_ccm->ma_epi)); |
| 363 | |
| 364 | |
| 365 | /* |
| 366 | * Resolve the MD fields. |
| 367 | */ |
| 368 | printf("\n\t MD Name Format %s (%u), MD Name length %u", |
| 369 | tok2str(cfm_md_nameformat_values, "Unknown", |
| 370 | msg_ptr.cfm_ccm->md_nameformat), |
| 371 | msg_ptr.cfm_ccm->md_nameformat, |
| 372 | msg_ptr.cfm_ccm->md_namelength); |
| 373 | |
| 374 | if (msg_ptr.cfm_ccm->md_nameformat != CFM_CCM_MD_FORMAT_NONE) { |
| 375 | printf("\n\t MD Name: "); |
| 376 | switch (msg_ptr.cfm_ccm->md_nameformat) { |
| 377 | case CFM_CCM_MD_FORMAT_DNS: |
| 378 | case CFM_CCM_MD_FORMAT_CHAR: |
| 379 | safeputs((const char *)msg_ptr.cfm_ccm->md_name, msg_ptr.cfm_ccm->md_namelength); |
| 380 | break; |
| 381 | |
| 382 | case CFM_CCM_MD_FORMAT_MAC: |
| 383 | printf("\n\t MAC %s", etheraddr_string( |
| 384 | msg_ptr.cfm_ccm->md_name)); |
| 385 | break; |
| 386 | |
| 387 | /* FIXME add printers for those MD formats - hexdump for now */ |
| 388 | case CFM_CCM_MA_FORMAT_8021: |
| 389 | default: |
| 390 | print_unknown_data(msg_ptr.cfm_ccm->md_name, "\n\t ", |
| 391 | msg_ptr.cfm_ccm->md_namelength); |
| 392 | } |
| 393 | } |
| 394 | |
| 395 | |
| 396 | /* |
| 397 | * Resolve the MA fields. |
| 398 | */ |
| 399 | ma_nameformat = msg_ptr.cfm_ccm->md_name + msg_ptr.cfm_ccm->md_namelength; |
| 400 | ma_namelength = msg_ptr.cfm_ccm->md_name + msg_ptr.cfm_ccm->md_namelength + 1; |
| 401 | ma_name = msg_ptr.cfm_ccm->md_name + msg_ptr.cfm_ccm->md_namelength + 2; |
| 402 | |
| 403 | printf("\n\t MA Name-Format %s (%u), MA name length %u", |
| 404 | tok2str(cfm_ma_nameformat_values, "Unknown", |
| 405 | *ma_nameformat), |
| 406 | *ma_nameformat, |
| 407 | *ma_namelength); |
| 408 | |
| 409 | printf("\n\t MA Name: "); |
| 410 | switch (*ma_nameformat) { |
| 411 | case CFM_CCM_MA_FORMAT_CHAR: |
| 412 | safeputs((const char *)ma_name, *ma_namelength); |
| 413 | break; |
| 414 | |
| 415 | /* FIXME add printers for those MA formats - hexdump for now */ |
| 416 | case CFM_CCM_MA_FORMAT_8021: |
| 417 | case CFM_CCM_MA_FORMAT_VID: |
| 418 | case CFM_CCM_MA_FORMAT_INT: |
| 419 | case CFM_CCM_MA_FORMAT_VPN: |
| 420 | default: |
| 421 | print_unknown_data(ma_name, "\n\t ", *ma_namelength); |
| 422 | } |
| 423 | break; |
| 424 | |
| 425 | case CFM_OPCODE_LTM: |
| 426 | msg_ptr.cfm_ltm = (const struct cfm_ltm_t *)tptr; |
| 427 | |
| 428 | printf(", Flags [%s]", |
| 429 | bittok2str(cfm_ltm_flag_values, "none", cfm_common_header->flags)); |
| 430 | |
| 431 | printf("\n\t Transaction-ID 0x%08x, Egress-ID %s, ttl %u", |
| 432 | EXTRACT_32BITS(msg_ptr.cfm_ltm->transaction_id), |
| 433 | cfm_egress_id_string(msg_ptr.cfm_ltm->egress_id), |
| 434 | msg_ptr.cfm_ltm->ttl); |
| 435 | |
| 436 | printf("\n\t Original-MAC %s, Target-MAC %s", |
| 437 | etheraddr_string(msg_ptr.cfm_ltm->original_mac), |
| 438 | etheraddr_string(msg_ptr.cfm_ltm->target_mac)); |
| 439 | break; |
| 440 | |
| 441 | case CFM_OPCODE_LTR: |
| 442 | msg_ptr.cfm_ltr = (const struct cfm_ltr_t *)tptr; |
| 443 | |
| 444 | printf(", Flags [%s]", |
| 445 | bittok2str(cfm_ltr_flag_values, "none", cfm_common_header->flags)); |
| 446 | |
| 447 | printf("\n\t Transaction-ID 0x%08x, Last-Egress-ID %s", |
| 448 | EXTRACT_32BITS(msg_ptr.cfm_ltr->transaction_id), |
| 449 | cfm_egress_id_string(msg_ptr.cfm_ltr->last_egress_id)); |
| 450 | |
| 451 | printf("\n\t Next-Egress-ID %s, ttl %u", |
| 452 | cfm_egress_id_string(msg_ptr.cfm_ltr->next_egress_id), |
| 453 | msg_ptr.cfm_ltr->ttl); |
| 454 | |
| 455 | printf("\n\t Replay-Action %s (%u)", |
| 456 | tok2str(cfm_ltr_replay_action_values, |
| 457 | "Unknown", |
| 458 | msg_ptr.cfm_ltr->replay_action), |
| 459 | msg_ptr.cfm_ltr->replay_action); |
| 460 | break; |
| 461 | |
| 462 | /* |
| 463 | * No message decoder yet. |
| 464 | * Hexdump everything up until the start of the TLVs |
| 465 | */ |
| 466 | case CFM_OPCODE_LBR: |
| 467 | case CFM_OPCODE_LBM: |
| 468 | default: |
| 469 | if (tlen > cfm_common_header->first_tlv_offset) { |
| 470 | print_unknown_data(tptr, "\n\t ", |
| 471 | tlen - cfm_common_header->first_tlv_offset); |
| 472 | } |
| 473 | break; |
| 474 | } |
| 475 | |
| 476 | /* |
| 477 | * Sanity check for not walking off. |
| 478 | */ |
| 479 | if (tlen <= cfm_common_header->first_tlv_offset) { |
| 480 | return; |
| 481 | } |
| 482 | |
| 483 | tptr += cfm_common_header->first_tlv_offset; |
| 484 | tlen -= cfm_common_header->first_tlv_offset; |
| 485 | |
| 486 | while (tlen > 0) { |
| 487 | cfm_tlv_header = (const struct cfm_tlv_header_t *)tptr; |
| 488 | |
| 489 | /* Enough to read the tlv type ? */ |
| 490 | TCHECK2(*tptr, 1); |
| 491 | cfm_tlv_type=cfm_tlv_header->type; |
| 492 | |
| 493 | if (cfm_tlv_type != CFM_TLV_END) { |
| 494 | /* did we capture enough for fully decoding the object header ? */ |
| 495 | TCHECK2(*tptr, sizeof(struct cfm_tlv_header_t)); |
| 496 | cfm_tlv_len=EXTRACT_16BITS(&cfm_tlv_header->length); |
| 497 | } else { |
| 498 | cfm_tlv_len = 0; |
| 499 | } |
| 500 | |
| 501 | printf("\n\t%s TLV (0x%02x), length %u", |
| 502 | tok2str(cfm_tlv_values, "Unknown", cfm_tlv_type), |
| 503 | cfm_tlv_type, |
| 504 | cfm_tlv_len); |
| 505 | |
| 506 | /* sanity check for not walking off and infinite loop check. */ |
| 507 | if ((cfm_tlv_type != CFM_TLV_END) && |
| 508 | ((cfm_tlv_len + sizeof(struct cfm_tlv_header_t) > tlen) || |
| 509 | (!cfm_tlv_len))) { |
| 510 | print_unknown_data(tptr,"\n\t ",tlen); |
| 511 | return; |
| 512 | } |
| 513 | |
| 514 | tptr += sizeof(struct cfm_tlv_header_t); |
| 515 | tlen -= sizeof(struct cfm_tlv_header_t); |
| 516 | tlv_ptr = tptr; |
| 517 | |
| 518 | /* did we capture enough for fully decoding the object ? */ |
| 519 | if (cfm_tlv_type != CFM_TLV_END) { |
| 520 | TCHECK2(*tptr, cfm_tlv_len); |
| 521 | } |
| 522 | hexdump = FALSE; |
| 523 | |
| 524 | switch(cfm_tlv_type) { |
| 525 | case CFM_TLV_END: |
| 526 | /* we are done - bail out */ |
| 527 | return; |
| 528 | |
| 529 | case CFM_TLV_PORT_STATUS: |
| 530 | printf(", Status: %s (%u)", |
| 531 | tok2str(cfm_tlv_port_status_values, "Unknown", *tptr), |
| 532 | *tptr); |
| 533 | break; |
| 534 | |
| 535 | case CFM_TLV_INTERFACE_STATUS: |
| 536 | printf(", Status: %s (%u)", |
| 537 | tok2str(cfm_tlv_interface_status_values, "Unknown", *tptr), |
| 538 | *tptr); |
| 539 | break; |
| 540 | |
| 541 | case CFM_TLV_PRIVATE: |
| 542 | printf(", Vendor: %s (%u), Sub-Type %u", |
| 543 | tok2str(oui_values,"Unknown", EXTRACT_24BITS(tptr)), |
| 544 | EXTRACT_24BITS(tptr), |
| 545 | *(tptr+3)); |
| 546 | hexdump = TRUE; |
| 547 | break; |
| 548 | |
| 549 | case CFM_TLV_SENDER_ID: |
| 550 | { |
| 551 | u_int chassis_id_type, chassis_id_length; |
| 552 | u_int mgmt_addr_length; |
| 553 | |
| 554 | /* |
| 555 | * Check if there is a Chassis-ID. |
| 556 | */ |
| 557 | chassis_id_length = *tptr; |
| 558 | if (chassis_id_length > tlen) { |
| 559 | hexdump = TRUE; |
| 560 | break; |
| 561 | } |
| 562 | |
| 563 | tptr++; |
| 564 | tlen--; |
| 565 | |
| 566 | if (chassis_id_length) { |
| 567 | chassis_id_type = *tptr; |
| 568 | printf("\n\t Chassis-ID Type %s (%u), Chassis-ID length %u", |
| 569 | tok2str(cfm_tlv_senderid_chassisid_values, |
| 570 | "Unknown", |
| 571 | chassis_id_type), |
| 572 | chassis_id_type, |
| 573 | chassis_id_length); |
| 574 | |
| 575 | switch (chassis_id_type) { |
| 576 | case CFM_CHASSIS_ID_MAC_ADDRESS: |
| 577 | printf("\n\t MAC %s", etheraddr_string(tptr+1)); |
| 578 | break; |
| 579 | |
| 580 | case CFM_CHASSIS_ID_NETWORK_ADDRESS: |
| 581 | hexdump |= cfm_mgmt_addr_print(tptr); |
| 582 | break; |
| 583 | |
| 584 | case CFM_CHASSIS_ID_INTERFACE_NAME: /* fall through */ |
| 585 | case CFM_CHASSIS_ID_INTERFACE_ALIAS: |
| 586 | case CFM_CHASSIS_ID_LOCAL: |
| 587 | case CFM_CHASSIS_ID_CHASSIS_COMPONENT: |
| 588 | case CFM_CHASSIS_ID_PORT_COMPONENT: |
| 589 | safeputs((const char *)tptr+1, chassis_id_length); |
| 590 | break; |
| 591 | |
| 592 | default: |
| 593 | hexdump = TRUE; |
| 594 | break; |
| 595 | } |
| 596 | } |
| 597 | |
| 598 | tptr += chassis_id_length; |
| 599 | tlen -= chassis_id_length; |
| 600 | |
| 601 | /* |
| 602 | * Check if there is a Management Address. |
| 603 | */ |
| 604 | mgmt_addr_length = *tptr; |
| 605 | if (mgmt_addr_length > tlen) { |
| 606 | hexdump = TRUE; |
| 607 | break; |
| 608 | } |
| 609 | |
| 610 | tptr++; |
| 611 | tlen--; |
| 612 | |
| 613 | if (mgmt_addr_length) { |
| 614 | hexdump |= cfm_mgmt_addr_print(tptr); |
| 615 | } |
| 616 | |
| 617 | tptr += mgmt_addr_length; |
| 618 | tlen -= mgmt_addr_length; |
| 619 | |
| 620 | } |
| 621 | break; |
| 622 | |
| 623 | /* |
| 624 | * FIXME those are the defined TLVs that lack a decoder |
| 625 | * you are welcome to contribute code ;-) |
| 626 | */ |
| 627 | |
| 628 | case CFM_TLV_DATA: |
| 629 | case CFM_TLV_REPLY_INGRESS: |
| 630 | case CFM_TLV_REPLY_EGRESS: |
| 631 | default: |
| 632 | hexdump = TRUE; |
| 633 | break; |
| 634 | } |
| 635 | /* do we want to see an additional hexdump ? */ |
| 636 | if (hexdump || vflag > 1) |
| 637 | print_unknown_data(tlv_ptr, "\n\t ", cfm_tlv_len); |
| 638 | |
| 639 | tptr+=cfm_tlv_len; |
| 640 | tlen-=cfm_tlv_len; |
| 641 | } |
| 642 | return; |
| 643 | trunc: |
| 644 | printf("\n\t\t packet exceeded snapshot"); |
| 645 | } |