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@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
cfm_network_addr_print(netdissect_options * ndo,register const u_char * tptr)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
cfm_print(netdissect_options * ndo,register const u_char * pptr,register u_int length)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