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 "slow protocols" LACP, MARKER as per 802.3ad
16 * OAM as per 802.3ah
17 *
18 * Original code by Hannes Gredler (hannes@juniper.net)
19 */
20
21 #include <sys/cdefs.h>
22 #ifndef lint
23 __RCSID("$NetBSD: print-slow.c,v 1.6 2015/03/31 21:59:35 christos Exp $");
24 #endif
25
26 #define NETDISSECT_REWORKED
27 #ifdef HAVE_CONFIG_H
28 #include "config.h"
29 #endif
30
31 #include <tcpdump-stdinc.h>
32
33 #include "interface.h"
34 #include "extract.h"
35 #include "addrtoname.h"
36 #include "ether.h"
37 #include "oui.h"
38
39 struct slow_common_header_t {
40 uint8_t proto_subtype;
41 uint8_t version;
42 };
43
44 #define SLOW_PROTO_LACP 1
45 #define SLOW_PROTO_MARKER 2
46 #define SLOW_PROTO_OAM 3
47
48 #define LACP_VERSION 1
49 #define MARKER_VERSION 1
50
51 static const struct tok slow_proto_values[] = {
52 { SLOW_PROTO_LACP, "LACP" },
53 { SLOW_PROTO_MARKER, "MARKER" },
54 { SLOW_PROTO_OAM, "OAM" },
55 { 0, NULL}
56 };
57
58 static const struct tok slow_oam_flag_values[] = {
59 { 0x0001, "Link Fault" },
60 { 0x0002, "Dying Gasp" },
61 { 0x0004, "Critical Event" },
62 { 0x0008, "Local Evaluating" },
63 { 0x0010, "Local Stable" },
64 { 0x0020, "Remote Evaluating" },
65 { 0x0040, "Remote Stable" },
66 { 0, NULL}
67 };
68
69 #define SLOW_OAM_CODE_INFO 0x00
70 #define SLOW_OAM_CODE_EVENT_NOTIF 0x01
71 #define SLOW_OAM_CODE_VAR_REQUEST 0x02
72 #define SLOW_OAM_CODE_VAR_RESPONSE 0x03
73 #define SLOW_OAM_CODE_LOOPBACK_CTRL 0x04
74 #define SLOW_OAM_CODE_PRIVATE 0xfe
75
76 static const struct tok slow_oam_code_values[] = {
77 { SLOW_OAM_CODE_INFO, "Information" },
78 { SLOW_OAM_CODE_EVENT_NOTIF, "Event Notification" },
79 { SLOW_OAM_CODE_VAR_REQUEST, "Variable Request" },
80 { SLOW_OAM_CODE_VAR_RESPONSE, "Variable Response" },
81 { SLOW_OAM_CODE_LOOPBACK_CTRL, "Loopback Control" },
82 { SLOW_OAM_CODE_PRIVATE, "Vendor Private" },
83 { 0, NULL}
84 };
85
86 struct slow_oam_info_t {
87 uint8_t info_type;
88 uint8_t info_length;
89 uint8_t oam_version;
90 uint8_t revision[2];
91 uint8_t state;
92 uint8_t oam_config;
93 uint8_t oam_pdu_config[2];
94 uint8_t oui[3];
95 uint8_t vendor_private[4];
96 };
97
98 #define SLOW_OAM_INFO_TYPE_END_OF_TLV 0x00
99 #define SLOW_OAM_INFO_TYPE_LOCAL 0x01
100 #define SLOW_OAM_INFO_TYPE_REMOTE 0x02
101 #define SLOW_OAM_INFO_TYPE_ORG_SPECIFIC 0xfe
102
103 static const struct tok slow_oam_info_type_values[] = {
104 { SLOW_OAM_INFO_TYPE_END_OF_TLV, "End of TLV marker" },
105 { SLOW_OAM_INFO_TYPE_LOCAL, "Local" },
106 { SLOW_OAM_INFO_TYPE_REMOTE, "Remote" },
107 { SLOW_OAM_INFO_TYPE_ORG_SPECIFIC, "Organization specific" },
108 { 0, NULL}
109 };
110
111 #define OAM_INFO_TYPE_PARSER_MASK 0x3
112 static const struct tok slow_oam_info_type_state_parser_values[] = {
113 { 0x00, "forwarding" },
114 { 0x01, "looping back" },
115 { 0x02, "discarding" },
116 { 0x03, "reserved" },
117 { 0, NULL}
118 };
119
120 #define OAM_INFO_TYPE_MUX_MASK 0x4
121 static const struct tok slow_oam_info_type_state_mux_values[] = {
122 { 0x00, "forwarding" },
123 { 0x04, "discarding" },
124 { 0, NULL}
125 };
126
127 static const struct tok slow_oam_info_type_oam_config_values[] = {
128 { 0x01, "Active" },
129 { 0x02, "Unidirectional" },
130 { 0x04, "Remote-Loopback" },
131 { 0x08, "Link-Events" },
132 { 0x10, "Variable-Retrieval" },
133 { 0, NULL}
134 };
135
136 /* 11 Bits */
137 #define OAM_INFO_TYPE_PDU_SIZE_MASK 0x7ff
138
139 #define SLOW_OAM_LINK_EVENT_END_OF_TLV 0x00
140 #define SLOW_OAM_LINK_EVENT_ERR_SYM_PER 0x01
141 #define SLOW_OAM_LINK_EVENT_ERR_FRM 0x02
142 #define SLOW_OAM_LINK_EVENT_ERR_FRM_PER 0x03
143 #define SLOW_OAM_LINK_EVENT_ERR_FRM_SUMM 0x04
144 #define SLOW_OAM_LINK_EVENT_ORG_SPECIFIC 0xfe
145
146 static const struct tok slow_oam_link_event_values[] = {
147 { SLOW_OAM_LINK_EVENT_END_OF_TLV, "End of TLV marker" },
148 { SLOW_OAM_LINK_EVENT_ERR_SYM_PER, "Errored Symbol Period Event" },
149 { SLOW_OAM_LINK_EVENT_ERR_FRM, "Errored Frame Event" },
150 { SLOW_OAM_LINK_EVENT_ERR_FRM_PER, "Errored Frame Period Event" },
151 { SLOW_OAM_LINK_EVENT_ERR_FRM_SUMM, "Errored Frame Seconds Summary Event" },
152 { SLOW_OAM_LINK_EVENT_ORG_SPECIFIC, "Organization specific" },
153 { 0, NULL}
154 };
155
156 struct slow_oam_link_event_t {
157 uint8_t event_type;
158 uint8_t event_length;
159 uint8_t time_stamp[2];
160 uint8_t window[8];
161 uint8_t threshold[8];
162 uint8_t errors[8];
163 uint8_t errors_running_total[8];
164 uint8_t event_running_total[4];
165 };
166
167 struct slow_oam_variablerequest_t {
168 uint8_t branch;
169 uint8_t leaf[2];
170 };
171
172 struct slow_oam_variableresponse_t {
173 uint8_t branch;
174 uint8_t leaf[2];
175 uint8_t length;
176 };
177
178 struct slow_oam_loopbackctrl_t {
179 uint8_t command;
180 };
181
182 static const struct tok slow_oam_loopbackctrl_cmd_values[] = {
183 { 0x01, "Enable OAM Remote Loopback" },
184 { 0x02, "Disable OAM Remote Loopback" },
185 { 0, NULL}
186 };
187
188 struct tlv_header_t {
189 uint8_t type;
190 uint8_t length;
191 };
192
193 #define LACP_TLV_TERMINATOR 0x00
194 #define LACP_TLV_ACTOR_INFO 0x01
195 #define LACP_TLV_PARTNER_INFO 0x02
196 #define LACP_TLV_COLLECTOR_INFO 0x03
197
198 #define MARKER_TLV_TERMINATOR 0x00
199 #define MARKER_TLV_MARKER_INFO 0x01
200
201 static const struct tok slow_tlv_values[] = {
202 { (SLOW_PROTO_LACP << 8) + LACP_TLV_TERMINATOR, "Terminator"},
203 { (SLOW_PROTO_LACP << 8) + LACP_TLV_ACTOR_INFO, "Actor Information"},
204 { (SLOW_PROTO_LACP << 8) + LACP_TLV_PARTNER_INFO, "Partner Information"},
205 { (SLOW_PROTO_LACP << 8) + LACP_TLV_COLLECTOR_INFO, "Collector Information"},
206
207 { (SLOW_PROTO_MARKER << 8) + MARKER_TLV_TERMINATOR, "Terminator"},
208 { (SLOW_PROTO_MARKER << 8) + MARKER_TLV_MARKER_INFO, "Marker Information"},
209 { 0, NULL}
210 };
211
212 struct lacp_tlv_actor_partner_info_t {
213 uint8_t sys_pri[2];
214 uint8_t sys[ETHER_ADDR_LEN];
215 uint8_t key[2];
216 uint8_t port_pri[2];
217 uint8_t port[2];
218 uint8_t state;
219 uint8_t pad[3];
220 };
221
222 static const struct tok lacp_tlv_actor_partner_info_state_values[] = {
223 { 0x01, "Activity"},
224 { 0x02, "Timeout"},
225 { 0x04, "Aggregation"},
226 { 0x08, "Synchronization"},
227 { 0x10, "Collecting"},
228 { 0x20, "Distributing"},
229 { 0x40, "Default"},
230 { 0x80, "Expired"},
231 { 0, NULL}
232 };
233
234 struct lacp_tlv_collector_info_t {
235 uint8_t max_delay[2];
236 uint8_t pad[12];
237 };
238
239 struct marker_tlv_marker_info_t {
240 uint8_t req_port[2];
241 uint8_t req_sys[ETHER_ADDR_LEN];
242 uint8_t req_trans_id[4];
243 uint8_t pad[2];
244 };
245
246 struct lacp_marker_tlv_terminator_t {
247 uint8_t pad[50];
248 };
249
250 static void slow_marker_lacp_print(netdissect_options *, register const u_char *, register u_int);
251 static void slow_oam_print(netdissect_options *, register const u_char *, register u_int);
252
253 const struct slow_common_header_t *slow_com_header;
254
255 void
slow_print(netdissect_options * ndo,register const u_char * pptr,register u_int len)256 slow_print(netdissect_options *ndo,
257 register const u_char *pptr, register u_int len)
258 {
259 int print_version;
260
261 slow_com_header = (const struct slow_common_header_t *)pptr;
262 ND_TCHECK(*slow_com_header);
263
264 /*
265 * Sanity checking of the header.
266 */
267 switch (slow_com_header->proto_subtype) {
268 case SLOW_PROTO_LACP:
269 if (slow_com_header->version != LACP_VERSION) {
270 ND_PRINT((ndo, "LACP version %u packet not supported",slow_com_header->version));
271 return;
272 }
273 print_version = 1;
274 break;
275
276 case SLOW_PROTO_MARKER:
277 if (slow_com_header->version != MARKER_VERSION) {
278 ND_PRINT((ndo, "MARKER version %u packet not supported",slow_com_header->version));
279 return;
280 }
281 print_version = 1;
282 break;
283
284 case SLOW_PROTO_OAM: /* fall through */
285 print_version = 0;
286 break;
287
288 default:
289 /* print basic information and exit */
290 print_version = -1;
291 break;
292 }
293
294 if (print_version) {
295 ND_PRINT((ndo, "%sv%u, length %u",
296 tok2str(slow_proto_values, "unknown (%u)",slow_com_header->proto_subtype),
297 slow_com_header->version,
298 len));
299 } else {
300 /* some slow protos don't have a version number in the header */
301 ND_PRINT((ndo, "%s, length %u",
302 tok2str(slow_proto_values, "unknown (%u)",slow_com_header->proto_subtype),
303 len));
304 }
305
306 /* unrecognized subtype */
307 if (print_version == -1) {
308 print_unknown_data(ndo, pptr, "\n\t", len);
309 return;
310 }
311
312 if (!ndo->ndo_vflag)
313 return;
314
315 switch (slow_com_header->proto_subtype) {
316 default: /* should not happen */
317 break;
318
319 case SLOW_PROTO_OAM:
320 /* skip proto_subtype */
321 slow_oam_print(ndo, pptr+1, len-1);
322 break;
323
324 case SLOW_PROTO_LACP: /* LACP and MARKER share the same semantics */
325 case SLOW_PROTO_MARKER:
326 /* skip slow_common_header */
327 len -= sizeof(const struct slow_common_header_t);
328 pptr += sizeof(const struct slow_common_header_t);
329 slow_marker_lacp_print(ndo, pptr, len);
330 break;
331 }
332 return;
333
334 trunc:
335 ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
336 }
337
338 static void
slow_marker_lacp_print(netdissect_options * ndo,register const u_char * tptr,register u_int tlen)339 slow_marker_lacp_print(netdissect_options *ndo,
340 register const u_char *tptr, register u_int tlen)
341 {
342 const struct tlv_header_t *tlv_header;
343 const u_char *tlv_tptr;
344 u_int tlv_len, tlv_tlen;
345
346 union {
347 const struct lacp_marker_tlv_terminator_t *lacp_marker_tlv_terminator;
348 const struct lacp_tlv_actor_partner_info_t *lacp_tlv_actor_partner_info;
349 const struct lacp_tlv_collector_info_t *lacp_tlv_collector_info;
350 const struct marker_tlv_marker_info_t *marker_tlv_marker_info;
351 } tlv_ptr;
352
353 while(tlen>0) {
354 /* did we capture enough for fully decoding the tlv header ? */
355 ND_TCHECK2(*tptr, sizeof(struct tlv_header_t));
356 tlv_header = (const struct tlv_header_t *)tptr;
357 tlv_len = tlv_header->length;
358
359 ND_PRINT((ndo, "\n\t%s TLV (0x%02x), length %u",
360 tok2str(slow_tlv_values,
361 "Unknown",
362 (slow_com_header->proto_subtype << 8) + tlv_header->type),
363 tlv_header->type,
364 tlv_len));
365
366 if ((tlv_len < sizeof(struct tlv_header_t) ||
367 tlv_len > tlen) &&
368 tlv_header->type != LACP_TLV_TERMINATOR &&
369 tlv_header->type != MARKER_TLV_TERMINATOR) {
370 ND_PRINT((ndo, "\n\t-----trailing data-----"));
371 print_unknown_data(ndo, tptr+sizeof(struct tlv_header_t), "\n\t ", tlen);
372 return;
373 }
374
375 tlv_tptr=tptr+sizeof(struct tlv_header_t);
376 tlv_tlen=tlv_len-sizeof(struct tlv_header_t);
377
378 /* did we capture enough for fully decoding the tlv ? */
379 ND_TCHECK2(*tptr, tlv_len);
380
381 switch((slow_com_header->proto_subtype << 8) + tlv_header->type) {
382
383 /* those two TLVs have the same structure -> fall through */
384 case ((SLOW_PROTO_LACP << 8) + LACP_TLV_ACTOR_INFO):
385 case ((SLOW_PROTO_LACP << 8) + LACP_TLV_PARTNER_INFO):
386 tlv_ptr.lacp_tlv_actor_partner_info = (const struct lacp_tlv_actor_partner_info_t *)tlv_tptr;
387
388 ND_PRINT((ndo, "\n\t System %s, System Priority %u, Key %u" \
389 ", Port %u, Port Priority %u\n\t State Flags [%s]",
390 etheraddr_string(ndo, tlv_ptr.lacp_tlv_actor_partner_info->sys),
391 EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->sys_pri),
392 EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->key),
393 EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->port),
394 EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->port_pri),
395 bittok2str(lacp_tlv_actor_partner_info_state_values,
396 "none",
397 tlv_ptr.lacp_tlv_actor_partner_info->state)));
398
399 break;
400
401 case ((SLOW_PROTO_LACP << 8) + LACP_TLV_COLLECTOR_INFO):
402 tlv_ptr.lacp_tlv_collector_info = (const struct lacp_tlv_collector_info_t *)tlv_tptr;
403
404 ND_PRINT((ndo, "\n\t Max Delay %u",
405 EXTRACT_16BITS(tlv_ptr.lacp_tlv_collector_info->max_delay)));
406
407 break;
408
409 case ((SLOW_PROTO_MARKER << 8) + MARKER_TLV_MARKER_INFO):
410 tlv_ptr.marker_tlv_marker_info = (const struct marker_tlv_marker_info_t *)tlv_tptr;
411
412 ND_PRINT((ndo, "\n\t Request System %s, Request Port %u, Request Transaction ID 0x%08x",
413 etheraddr_string(ndo, tlv_ptr.marker_tlv_marker_info->req_sys),
414 EXTRACT_16BITS(tlv_ptr.marker_tlv_marker_info->req_port),
415 EXTRACT_32BITS(tlv_ptr.marker_tlv_marker_info->req_trans_id)));
416
417 break;
418
419 /* those two TLVs have the same structure -> fall through */
420 case ((SLOW_PROTO_LACP << 8) + LACP_TLV_TERMINATOR):
421 case ((SLOW_PROTO_MARKER << 8) + LACP_TLV_TERMINATOR):
422 tlv_ptr.lacp_marker_tlv_terminator = (const struct lacp_marker_tlv_terminator_t *)tlv_tptr;
423 if (tlv_len == 0) {
424 tlv_len = sizeof(tlv_ptr.lacp_marker_tlv_terminator->pad) +
425 sizeof(struct tlv_header_t);
426 /* tell the user that we modified the length field */
427 if (ndo->ndo_vflag>1)
428 ND_PRINT((ndo, " (=%u)", tlv_len));
429 /* we have messed around with the length field - now we need to check
430 * again if there are enough bytes on the wire for the hexdump */
431 ND_TCHECK2(tlv_ptr.lacp_marker_tlv_terminator->pad[0],
432 sizeof(tlv_ptr.lacp_marker_tlv_terminator->pad));
433 }
434
435 break;
436
437 default:
438 if (ndo->ndo_vflag <= 1)
439 print_unknown_data(ndo, tlv_tptr, "\n\t ", tlv_tlen);
440 break;
441 }
442 /* do we want to see an additional hexdump ? */
443 if (ndo->ndo_vflag > 1) {
444 print_unknown_data(ndo, tptr+sizeof(struct tlv_header_t), "\n\t ",
445 tlv_len-sizeof(struct tlv_header_t));
446 }
447
448 tptr+=tlv_len;
449 tlen-=tlv_len;
450 }
451 return;
452 trunc:
453 ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
454 }
455
456 static void
slow_oam_print(netdissect_options * ndo,register const u_char * tptr,register u_int tlen)457 slow_oam_print(netdissect_options *ndo,
458 register const u_char *tptr, register u_int tlen)
459 {
460 u_int hexdump;
461
462 struct slow_oam_common_header_t {
463 uint8_t flags[2];
464 uint8_t code;
465 };
466
467 struct slow_oam_tlv_header_t {
468 uint8_t type;
469 uint8_t length;
470 };
471
472 union {
473 const struct slow_oam_common_header_t *slow_oam_common_header;
474 const struct slow_oam_tlv_header_t *slow_oam_tlv_header;
475 } ptr;
476
477 union {
478 const struct slow_oam_info_t *slow_oam_info;
479 const struct slow_oam_link_event_t *slow_oam_link_event;
480 const struct slow_oam_variablerequest_t *slow_oam_variablerequest;
481 const struct slow_oam_variableresponse_t *slow_oam_variableresponse;
482 const struct slow_oam_loopbackctrl_t *slow_oam_loopbackctrl;
483 } tlv;
484
485 ptr.slow_oam_common_header = (struct slow_oam_common_header_t *)tptr;
486 tptr += sizeof(struct slow_oam_common_header_t);
487 tlen -= sizeof(struct slow_oam_common_header_t);
488
489 ND_PRINT((ndo, "\n\tCode %s OAM PDU, Flags [%s]",
490 tok2str(slow_oam_code_values, "Unknown (%u)", ptr.slow_oam_common_header->code),
491 bittok2str(slow_oam_flag_values,
492 "none",
493 EXTRACT_16BITS(&ptr.slow_oam_common_header->flags))));
494
495 switch (ptr.slow_oam_common_header->code) {
496 case SLOW_OAM_CODE_INFO:
497 while (tlen > 0) {
498 ptr.slow_oam_tlv_header = (const struct slow_oam_tlv_header_t *)tptr;
499 ND_PRINT((ndo, "\n\t %s Information Type (%u), length %u",
500 tok2str(slow_oam_info_type_values, "Reserved",
501 ptr.slow_oam_tlv_header->type),
502 ptr.slow_oam_tlv_header->type,
503 ptr.slow_oam_tlv_header->length));
504
505 hexdump = FALSE;
506 switch (ptr.slow_oam_tlv_header->type) {
507 case SLOW_OAM_INFO_TYPE_END_OF_TLV:
508 if (ptr.slow_oam_tlv_header->length != 0) {
509 ND_PRINT((ndo, "\n\t ERROR: illegal length - should be 0"));
510 }
511 return;
512
513 case SLOW_OAM_INFO_TYPE_LOCAL: /* identical format - fall through */
514 case SLOW_OAM_INFO_TYPE_REMOTE:
515 tlv.slow_oam_info = (const struct slow_oam_info_t *)tptr;
516
517 if (tlv.slow_oam_info->info_length !=
518 sizeof(struct slow_oam_info_t)) {
519 ND_PRINT((ndo, "\n\t ERROR: illegal length - should be %lu",
520 (unsigned long) sizeof(struct slow_oam_info_t)));
521 return;
522 }
523
524 ND_PRINT((ndo, "\n\t OAM-Version %u, Revision %u",
525 tlv.slow_oam_info->oam_version,
526 EXTRACT_16BITS(&tlv.slow_oam_info->revision)));
527
528 ND_PRINT((ndo, "\n\t State-Parser-Action %s, State-MUX-Action %s",
529 tok2str(slow_oam_info_type_state_parser_values, "Reserved",
530 tlv.slow_oam_info->state & OAM_INFO_TYPE_PARSER_MASK),
531 tok2str(slow_oam_info_type_state_mux_values, "Reserved",
532 tlv.slow_oam_info->state & OAM_INFO_TYPE_MUX_MASK)));
533 ND_PRINT((ndo, "\n\t OAM-Config Flags [%s], OAM-PDU-Config max-PDU size %u",
534 bittok2str(slow_oam_info_type_oam_config_values, "none",
535 tlv.slow_oam_info->oam_config),
536 EXTRACT_16BITS(&tlv.slow_oam_info->oam_pdu_config) &
537 OAM_INFO_TYPE_PDU_SIZE_MASK));
538 ND_PRINT((ndo, "\n\t OUI %s (0x%06x), Vendor-Private 0x%08x",
539 tok2str(oui_values, "Unknown",
540 EXTRACT_24BITS(&tlv.slow_oam_info->oui)),
541 EXTRACT_24BITS(&tlv.slow_oam_info->oui),
542 EXTRACT_32BITS(&tlv.slow_oam_info->vendor_private)));
543 break;
544
545 case SLOW_OAM_INFO_TYPE_ORG_SPECIFIC:
546 hexdump = TRUE;
547 break;
548
549 default:
550 hexdump = TRUE;
551 break;
552 }
553
554 /* infinite loop check */
555 if (!ptr.slow_oam_tlv_header->length) {
556 return;
557 }
558
559 /* do we also want to see a hex dump ? */
560 if (ndo->ndo_vflag > 1 || hexdump==TRUE) {
561 print_unknown_data(ndo, tptr, "\n\t ",
562 ptr.slow_oam_tlv_header->length);
563 }
564
565 tlen -= ptr.slow_oam_tlv_header->length;
566 tptr += ptr.slow_oam_tlv_header->length;
567 }
568 break;
569
570 case SLOW_OAM_CODE_EVENT_NOTIF:
571 while (tlen > 0) {
572 ptr.slow_oam_tlv_header = (const struct slow_oam_tlv_header_t *)tptr;
573 ND_PRINT((ndo, "\n\t %s Link Event Type (%u), length %u",
574 tok2str(slow_oam_link_event_values, "Reserved",
575 ptr.slow_oam_tlv_header->type),
576 ptr.slow_oam_tlv_header->type,
577 ptr.slow_oam_tlv_header->length));
578
579 hexdump = FALSE;
580 switch (ptr.slow_oam_tlv_header->type) {
581 case SLOW_OAM_LINK_EVENT_END_OF_TLV:
582 if (ptr.slow_oam_tlv_header->length != 0) {
583 ND_PRINT((ndo, "\n\t ERROR: illegal length - should be 0"));
584 }
585 return;
586
587 case SLOW_OAM_LINK_EVENT_ERR_SYM_PER: /* identical format - fall through */
588 case SLOW_OAM_LINK_EVENT_ERR_FRM:
589 case SLOW_OAM_LINK_EVENT_ERR_FRM_PER:
590 case SLOW_OAM_LINK_EVENT_ERR_FRM_SUMM:
591 tlv.slow_oam_link_event = (const struct slow_oam_link_event_t *)tptr;
592
593 if (tlv.slow_oam_link_event->event_length !=
594 sizeof(struct slow_oam_link_event_t)) {
595 ND_PRINT((ndo, "\n\t ERROR: illegal length - should be %lu",
596 (unsigned long) sizeof(struct slow_oam_link_event_t)));
597 return;
598 }
599
600 ND_PRINT((ndo, "\n\t Timestamp %u ms, Errored Window %" PRIu64
601 "\n\t Errored Threshold %" PRIu64
602 "\n\t Errors %" PRIu64
603 "\n\t Error Running Total %" PRIu64
604 "\n\t Event Running Total %u",
605 EXTRACT_16BITS(&tlv.slow_oam_link_event->time_stamp)*100,
606 EXTRACT_64BITS(&tlv.slow_oam_link_event->window),
607 EXTRACT_64BITS(&tlv.slow_oam_link_event->threshold),
608 EXTRACT_64BITS(&tlv.slow_oam_link_event->errors),
609 EXTRACT_64BITS(&tlv.slow_oam_link_event->errors_running_total),
610 EXTRACT_32BITS(&tlv.slow_oam_link_event->event_running_total)));
611 break;
612
613 case SLOW_OAM_LINK_EVENT_ORG_SPECIFIC:
614 hexdump = TRUE;
615 break;
616
617 default:
618 hexdump = TRUE;
619 break;
620 }
621
622 /* infinite loop check */
623 if (!ptr.slow_oam_tlv_header->length) {
624 return;
625 }
626
627 /* do we also want to see a hex dump ? */
628 if (ndo->ndo_vflag > 1 || hexdump==TRUE) {
629 print_unknown_data(ndo, tptr, "\n\t ",
630 ptr.slow_oam_tlv_header->length);
631 }
632
633 tlen -= ptr.slow_oam_tlv_header->length;
634 tptr += ptr.slow_oam_tlv_header->length;
635 }
636 break;
637
638 case SLOW_OAM_CODE_LOOPBACK_CTRL:
639 tlv.slow_oam_loopbackctrl = (const struct slow_oam_loopbackctrl_t *)tptr;
640 ND_PRINT((ndo, "\n\t Command %s (%u)",
641 tok2str(slow_oam_loopbackctrl_cmd_values,
642 "Unknown",
643 tlv.slow_oam_loopbackctrl->command),
644 tlv.slow_oam_loopbackctrl->command));
645 tptr ++;
646 tlen --;
647 break;
648
649 /*
650 * FIXME those are the defined codes that lack a decoder
651 * you are welcome to contribute code ;-)
652 */
653 case SLOW_OAM_CODE_VAR_REQUEST:
654 case SLOW_OAM_CODE_VAR_RESPONSE:
655 case SLOW_OAM_CODE_PRIVATE:
656 default:
657 if (ndo->ndo_vflag <= 1) {
658 print_unknown_data(ndo, tptr, "\n\t ", tlen);
659 }
660 break;
661 }
662 return;
663 }
664