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gerrit-public.fairphone.software / platform / external / tcpdump / 2949f58a438f6fd85f66a8b7ed4708042cde4b37 / . / print-ldp.c
blob: 3280d8ca2a862edbc81ccdca769cae8f355bf65d [file] [log] [blame]
The Android Open Source Project2949f582009-03-03 19:30:46 -0800[diff] [blame^]1/*
2 * Redistribution and use in source and binary forms, with or without
3 * modification, are permitted provided that: (1) source code
4 * distributions retain the above copyright notice and this paragraph
5 * in its entirety, and (2) distributions including binary code include
6 * the above copyright notice and this paragraph in its entirety in
7 * the documentation or other materials provided with the distribution.
8 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND
9 * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
10 * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
11 * FOR A PARTICULAR PURPOSE.
12 *
13 * Original code by Hannes Gredler (hannes@juniper.net)
14 * and Steinar Haug (sthaug@nethelp.no)
15 */
16
17#ifndef lint
18static const char rcsid[] _U_ =
19 "@(#) $Header: /tcpdump/master/tcpdump/print-ldp.c,v 1.8.2.10 2007/02/26 13:31:33 hannes Exp $";
20#endif
21
22#ifdef HAVE_CONFIG_H
23#include "config.h"
24#endif
25
26#include <tcpdump-stdinc.h>
27
28#include <stdio.h>
29#include <stdlib.h>
30#include <string.h>
31
32#include "interface.h"
33#include "decode_prefix.h"
34#include "extract.h"
35#include "addrtoname.h"
36#include "af.h"
37
38#include "l2vpn.h"
39
40/*
41 * ldp common header
42 *
43 * 0 1 2 3
44 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
45 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
46 * | Version | PDU Length |
47 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
48 * | LDP Identifier |
49 * + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
50 * | |
51 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
52 *
53 */
54
55struct ldp_common_header {
56 u_int8_t version[2];
57 u_int8_t pdu_length[2];
58 u_int8_t lsr_id[4];
59 u_int8_t label_space[2];
60};
61
62#define LDP_VERSION 1
63
64/*
65 * ldp message header
66 *
67 * 0 1 2 3
68 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
69 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
70 * |U| Message Type | Message Length |
71 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
72 * | Message ID |
73 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
74 * | |
75 * + +
76 * | Mandatory Parameters |
77 * + +
78 * | |
79 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
80 * | |
81 * + +
82 * | Optional Parameters |
83 * + +
84 * | |
85 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
86 */
87
88struct ldp_msg_header {
89 u_int8_t type[2];
90 u_int8_t length[2];
91 u_int8_t id[4];
92};
93
94#define LDP_MASK_MSG_TYPE(x) ((x)&0x7fff)
95#define LDP_MASK_U_BIT(x) ((x)&0x8000)
96
97#define LDP_MSG_NOTIF 0x0001
98#define LDP_MSG_HELLO 0x0100
99#define LDP_MSG_INIT 0x0200
100#define LDP_MSG_KEEPALIVE 0x0201
101#define LDP_MSG_ADDRESS 0x0300
102#define LDP_MSG_ADDRESS_WITHDRAW 0x0301
103#define LDP_MSG_LABEL_MAPPING 0x0400
104#define LDP_MSG_LABEL_REQUEST 0x0401
105#define LDP_MSG_LABEL_WITHDRAW 0x0402
106#define LDP_MSG_LABEL_RELEASE 0x0403
107#define LDP_MSG_LABEL_ABORT_REQUEST 0x0404
108
109#define LDP_VENDOR_PRIVATE_MIN 0x3e00
110#define LDP_VENDOR_PRIVATE_MAX 0x3eff
111#define LDP_EXPERIMENTAL_MIN 0x3f00
112#define LDP_EXPERIMENTAL_MAX 0x3fff
113
114static const struct tok ldp_msg_values[] = {
115 { LDP_MSG_NOTIF, "Notification" },
116 { LDP_MSG_HELLO, "Hello" },
117 { LDP_MSG_INIT, "Initialization" },
118 { LDP_MSG_KEEPALIVE, "Keepalive" },
119 { LDP_MSG_ADDRESS, "Address" },
120 { LDP_MSG_ADDRESS_WITHDRAW, "Address Withdraw" },
121 { LDP_MSG_LABEL_MAPPING, "Label Mapping" },
122 { LDP_MSG_LABEL_REQUEST, "Label Request" },
123 { LDP_MSG_LABEL_WITHDRAW, "Label Withdraw" },
124 { LDP_MSG_LABEL_RELEASE, "Label Release" },
125 { LDP_MSG_LABEL_ABORT_REQUEST, "Label Abort Request" },
126 { 0, NULL}
127};
128
129#define LDP_MASK_TLV_TYPE(x) ((x)&0x3fff)
130#define LDP_MASK_F_BIT(x) ((x)&0x4000)
131
132#define LDP_TLV_FEC 0x0100
133#define LDP_TLV_ADDRESS_LIST 0x0101
134#define LDP_TLV_HOP_COUNT 0x0103
135#define LDP_TLV_PATH_VECTOR 0x0104
136#define LDP_TLV_GENERIC_LABEL 0x0200
137#define LDP_TLV_ATM_LABEL 0x0201
138#define LDP_TLV_FR_LABEL 0x0202
139#define LDP_TLV_STATUS 0x0300
140#define LDP_TLV_EXTD_STATUS 0x0301
141#define LDP_TLV_RETURNED_PDU 0x0302
142#define LDP_TLV_RETURNED_MSG 0x0303
143#define LDP_TLV_COMMON_HELLO 0x0400
144#define LDP_TLV_IPV4_TRANSPORT_ADDR 0x0401
145#define LDP_TLV_CONFIG_SEQ_NUMBER 0x0402
146#define LDP_TLV_IPV6_TRANSPORT_ADDR 0x0403
147#define LDP_TLV_COMMON_SESSION 0x0500
148#define LDP_TLV_ATM_SESSION_PARM 0x0501
149#define LDP_TLV_FR_SESSION_PARM 0x0502
150#define LDP_TLV_FT_SESSION 0x0503
151#define LDP_TLV_LABEL_REQUEST_MSG_ID 0x0600
152
153static const struct tok ldp_tlv_values[] = {
154 { LDP_TLV_FEC, "FEC" },
155 { LDP_TLV_ADDRESS_LIST, "Address List" },
156 { LDP_TLV_HOP_COUNT, "Hop Count" },
157 { LDP_TLV_PATH_VECTOR, "Path Vector" },
158 { LDP_TLV_GENERIC_LABEL, "Generic Label" },
159 { LDP_TLV_ATM_LABEL, "ATM Label" },
160 { LDP_TLV_FR_LABEL, "Frame-Relay Label" },
161 { LDP_TLV_STATUS, "Status" },
162 { LDP_TLV_EXTD_STATUS, "Extended Status" },
163 { LDP_TLV_RETURNED_PDU, "Returned PDU" },
164 { LDP_TLV_RETURNED_MSG, "Returned Message" },
165 { LDP_TLV_COMMON_HELLO, "Common Hello Parameters" },
166 { LDP_TLV_IPV4_TRANSPORT_ADDR, "IPv4 Transport Address" },
167 { LDP_TLV_CONFIG_SEQ_NUMBER, "Configuration Sequence Number" },
168 { LDP_TLV_IPV6_TRANSPORT_ADDR, "IPv6 Transport Address" },
169 { LDP_TLV_COMMON_SESSION, "Common Session Parameters" },
170 { LDP_TLV_ATM_SESSION_PARM, "ATM Session Parameters" },
171 { LDP_TLV_FR_SESSION_PARM, "Frame-Relay Session Parameters" },
172 { LDP_TLV_FT_SESSION, "Fault-Tolerant Session Parameters" },
173 { LDP_TLV_LABEL_REQUEST_MSG_ID, "Label Request Message ID" },
174 { 0, NULL}
175};
176
177#define LDP_FEC_WILDCARD 0x01
178#define LDP_FEC_PREFIX 0x02
179#define LDP_FEC_HOSTADDRESS 0x03
180/* From draft-martini-l2circuit-trans-mpls-13.txt */
181#define LDP_FEC_MARTINI_VC 0x80
182
183static const struct tok ldp_fec_values[] = {
184 { LDP_FEC_WILDCARD, "Wildcard" },
185 { LDP_FEC_PREFIX, "Prefix" },
186 { LDP_FEC_HOSTADDRESS, "Host address" },
187 { LDP_FEC_MARTINI_VC, "Martini VC" },
188 { 0, NULL}
189};
190
191#define LDP_FEC_MARTINI_IFPARM_MTU 0x01
192#define LDP_FEC_MARTINI_IFPARM_DESC 0x03
193#define LDP_FEC_MARTINI_IFPARM_VCCV 0x0c
194
195static const struct tok ldp_fec_martini_ifparm_values[] = {
196 { LDP_FEC_MARTINI_IFPARM_MTU, "MTU" },
197 { LDP_FEC_MARTINI_IFPARM_DESC, "Description" },
198 { LDP_FEC_MARTINI_IFPARM_VCCV, "VCCV" },
199 { 0, NULL}
200};
201
202/* draft-ietf-pwe3-vccv-04.txt */
203static const struct tok ldp_fec_martini_ifparm_vccv_cc_values[] = {
204 { 0x01, "PWE3 control word" },
205 { 0x02, "MPLS Router Alert Label" },
206 { 0x04, "MPLS inner label TTL = 1" },
207 { 0, NULL}
208};
209
210/* draft-ietf-pwe3-vccv-04.txt */
211static const struct tok ldp_fec_martini_ifparm_vccv_cv_values[] = {
212 { 0x01, "ICMP Ping" },
213 { 0x02, "LSP Ping" },
214 { 0x04, "BFD" },
215 { 0, NULL}
216};
217
218#define AFNUM_LEN 2
219
220int ldp_msg_print(register const u_char *);
221int ldp_tlv_print(register const u_char *);
222
223/*
224 * ldp tlv header
225 *
226 * 0 1 2 3
227 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
228 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
229 * |U|F| Type | Length |
230 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
231 * | |
232 * | Value |
233 * ~ ~
234 * | |
235 * | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
236 * | |
237 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
238 */
239
240int
241ldp_tlv_print(register const u_char *tptr) {
242
243 struct ldp_tlv_header {
244 u_int8_t type[2];
245 u_int8_t length[2];
246 };
247
248 const struct ldp_tlv_header *ldp_tlv_header;
249 u_short tlv_type,tlv_len,tlv_tlen,af,ft_flags;
250 u_char fec_type;
251 u_int ui,vc_info_len, vc_info_tlv_type, vc_info_tlv_len,idx;
252 char buf[100];
253 int i;
254
255 ldp_tlv_header = (const struct ldp_tlv_header *)tptr;
256 tlv_len=EXTRACT_16BITS(ldp_tlv_header->length);
257 tlv_tlen=tlv_len;
258 tlv_type=LDP_MASK_TLV_TYPE(EXTRACT_16BITS(ldp_tlv_header->type));
259
260 /* FIXME vendor private / experimental check */
261 printf("\n\t %s TLV (0x%04x), length: %u, Flags: [%s and %s forward if unknown]",
262 tok2str(ldp_tlv_values,
263 "Unknown",
264 tlv_type),
265 tlv_type,
266 tlv_len,
267 LDP_MASK_U_BIT(EXTRACT_16BITS(&ldp_tlv_header->type)) ? "continue processing" : "ignore",
268 LDP_MASK_F_BIT(EXTRACT_16BITS(&ldp_tlv_header->type)) ? "do" : "don't");
269
270 tptr+=sizeof(struct ldp_tlv_header);
271
272 switch(tlv_type) {
273
274 case LDP_TLV_COMMON_HELLO:
275 printf("\n\t Hold Time: %us, Flags: [%s Hello%s]",
276 EXTRACT_16BITS(tptr),
277 (EXTRACT_16BITS(tptr+2)&0x8000) ? "Targeted" : "Link",
278 (EXTRACT_16BITS(tptr+2)&0x4000) ? ", Request for targeted Hellos" : "");
279 break;
280
281 case LDP_TLV_IPV4_TRANSPORT_ADDR:
282 printf("\n\t IPv4 Transport Address: %s", ipaddr_string(tptr));
283 break;
284#ifdef INET6
285 case LDP_TLV_IPV6_TRANSPORT_ADDR:
286 printf("\n\t IPv6 Transport Address: %s", ip6addr_string(tptr));
287 break;
288#endif
289 case LDP_TLV_CONFIG_SEQ_NUMBER:
290 printf("\n\t Sequence Number: %u", EXTRACT_32BITS(tptr));
291 break;
292
293 case LDP_TLV_ADDRESS_LIST:
294 af = EXTRACT_16BITS(tptr);
295 tptr+=AFNUM_LEN;
296 tlv_tlen -= AFNUM_LEN;
297 printf("\n\t Address Family: ");
298 if (af == AFNUM_INET) {
299 printf("IPv4, addresses:");
300 while(tlv_tlen >= sizeof(struct in_addr)) {
301 printf(" %s",ipaddr_string(tptr));
302 tlv_tlen-=sizeof(struct in_addr);
303 tptr+=sizeof(struct in_addr);
304 }
305 }
306#ifdef INET6
307 else if (af == AFNUM_INET6) {
308 printf("IPv6, addresses:");
309 while(tlv_tlen >= sizeof(struct in6_addr)) {
310 printf(" %s",ip6addr_string(tptr));
311 tlv_tlen-=sizeof(struct in6_addr);
312 tptr+=sizeof(struct in6_addr);
313 }
314 }
315#endif
316 break;
317
318 case LDP_TLV_COMMON_SESSION:
319 printf("\n\t Version: %u, Keepalive: %us, Flags: [Downstream %s, Loop Detection %s]",
320 EXTRACT_16BITS(tptr), EXTRACT_16BITS(tptr+2),
321 (EXTRACT_16BITS(tptr+6)&0x8000) ? "On Demand" : "Unsolicited",
322 (EXTRACT_16BITS(tptr+6)&0x4000) ? "Enabled" : "Disabled"
323 );
324 break;
325
326 case LDP_TLV_FEC:
327 fec_type = *tptr;
328 printf("\n\t %s FEC (0x%02x)",
329 tok2str(ldp_fec_values, "Unknown", fec_type),
330 fec_type);
331
332 tptr+=1;
333 switch(fec_type) {
334
335 case LDP_FEC_WILDCARD:
336 break;
337 case LDP_FEC_PREFIX:
338 af = EXTRACT_16BITS(tptr);
339 tptr+=2;
340 if (af == AFNUM_INET) {
341 i=decode_prefix4(tptr,buf,sizeof(buf));
342 printf(": IPv4 prefix %s",buf);
343 }
344#ifdef INET6
345 else if (af == AFNUM_INET6) {
346 i=decode_prefix6(tptr,buf,sizeof(buf));
347 printf(": IPv6 prefix %s",buf);
348 }
349#endif
350 break;
351 case LDP_FEC_HOSTADDRESS:
352 break;
353 case LDP_FEC_MARTINI_VC:
354 if (!TTEST2(*tptr, 11))
355 goto trunc;
356 vc_info_len = *(tptr+2);
357
358 printf(": %s, %scontrol word, group-ID %u, VC-ID %u, VC-info-length: %u",
359 tok2str(l2vpn_encaps_values, "Unknown", EXTRACT_16BITS(tptr)&0x7fff),
360 EXTRACT_16BITS(tptr)&0x8000 ? "" : "no ",
361 EXTRACT_32BITS(tptr+3),
362 EXTRACT_32BITS(tptr+7),
363 vc_info_len);
364
365 if (vc_info_len == 0) /* infinite loop protection */
366 break;
367
368 tptr+=11;
369 if (!TTEST2(*tptr, vc_info_len))
370 goto trunc;
371
372 while (vc_info_len > 2) {
373 vc_info_tlv_type = *tptr;
374 vc_info_tlv_len = *(tptr+1);
375 if (vc_info_tlv_len < 2)
376 break;
377 if (vc_info_len < vc_info_tlv_len)
378 break;
379
380 printf("\n\t\tInterface Parameter: %s (0x%02x), len %u",
381 tok2str(ldp_fec_martini_ifparm_values,"Unknown",vc_info_tlv_type),
382 vc_info_tlv_type,
383 vc_info_tlv_len);
384
385 switch(vc_info_tlv_type) {
386 case LDP_FEC_MARTINI_IFPARM_MTU:
387 printf(": %u",EXTRACT_16BITS(tptr+2));
388 break;
389
390 case LDP_FEC_MARTINI_IFPARM_DESC:
391 printf(": ");
392 for (idx = 2; idx < vc_info_tlv_len; idx++)
393 safeputchar(*(tptr+idx));
394 break;
395
396 case LDP_FEC_MARTINI_IFPARM_VCCV:
397 printf("\n\t\t Control Channels (0x%02x) = [%s]",
398 *(tptr+2),
399 bittok2str(ldp_fec_martini_ifparm_vccv_cc_values,"none",*(tptr+2)));
400 printf("\n\t\t CV Types (0x%02x) = [%s]",
401 *(tptr+3),
402 bittok2str(ldp_fec_martini_ifparm_vccv_cv_values,"none",*(tptr+3)));
403 break;
404
405 default:
406 print_unknown_data(tptr+2,"\n\t\t ",vc_info_tlv_len-2);
407 break;
408 }
409
410 vc_info_len -= vc_info_tlv_len;
411 tptr += vc_info_tlv_len;
412 }
413 break;
414 }
415
416 break;
417
418 case LDP_TLV_GENERIC_LABEL:
419 printf("\n\t Label: %u", EXTRACT_32BITS(tptr) & 0xfffff);
420 break;
421
422 case LDP_TLV_STATUS:
423 ui = EXTRACT_32BITS(tptr);
424 tptr+=4;
425 printf("\n\t Status: 0x%02x, Flags: [%s and %s forward]",
426 ui&0x3fffffff,
427 ui&0x80000000 ? "Fatal error" : "Advisory Notification",
428 ui&0x40000000 ? "do" : "don't");
429 ui = EXTRACT_32BITS(tptr);
430 tptr+=4;
431 if (ui)
432 printf(", causing Message ID: 0x%08x", ui);
433 break;
434
435 case LDP_TLV_FT_SESSION:
436 ft_flags = EXTRACT_16BITS(tptr);
437 printf("\n\t Flags: [%sReconnect, %sSave State, %sAll-Label Protection, %s Checkpoint, %sRe-Learn State]",
438 ft_flags&0x8000 ? "" : "No ",
439 ft_flags&0x8 ? "" : "Don't ",
440 ft_flags&0x4 ? "" : "No ",
441 ft_flags&0x2 ? "Sequence Numbered Label" : "All Labels",
442 ft_flags&0x1 ? "" : "Don't ");
443 tptr+=4;
444 ui = EXTRACT_32BITS(tptr);
445 if (ui)
446 printf(", Reconnect Timeout: %ums", ui);
447 tptr+=4;
448 ui = EXTRACT_32BITS(tptr);
449 if (ui)
450 printf(", Recovery Time: %ums", ui);
451 break;
452
453
454 /*
455 * FIXME those are the defined TLVs that lack a decoder
456 * you are welcome to contribute code ;-)
457 */
458
459 case LDP_TLV_HOP_COUNT:
460 case LDP_TLV_PATH_VECTOR:
461 case LDP_TLV_ATM_LABEL:
462 case LDP_TLV_FR_LABEL:
463 case LDP_TLV_EXTD_STATUS:
464 case LDP_TLV_RETURNED_PDU:
465 case LDP_TLV_RETURNED_MSG:
466 case LDP_TLV_ATM_SESSION_PARM:
467 case LDP_TLV_FR_SESSION_PARM:
468 case LDP_TLV_LABEL_REQUEST_MSG_ID:
469
470 default:
471 if (vflag <= 1)
472 print_unknown_data(tptr,"\n\t ",tlv_tlen);
473 break;
474 }
475 return(tlv_len+4); /* Type & Length fields not included */
476
477trunc:
478 printf("\n\t\t packet exceeded snapshot");
479 return 0;
480}
481
482void
483ldp_print(register const u_char *pptr, register u_int len) {
484
485 int processed;
486 while (len > (sizeof(struct ldp_common_header) + sizeof(struct ldp_msg_header))) {
487 processed = ldp_msg_print(pptr);
488 if (processed == 0)
489 return;
490 len -= processed;
491 pptr += processed;
492 }
493}
494
495
496int
497ldp_msg_print(register const u_char *pptr) {
498
499 const struct ldp_common_header *ldp_com_header;
500 const struct ldp_msg_header *ldp_msg_header;
501 const u_char *tptr,*msg_tptr;
502 u_short tlen;
503 u_short pdu_len,msg_len,msg_type,msg_tlen;
504 int hexdump,processed;
505
506 tptr=pptr;
507 ldp_com_header = (const struct ldp_common_header *)pptr;
508 TCHECK(*ldp_com_header);
509
510 /*
511 * Sanity checking of the header.
512 */
513 if (EXTRACT_16BITS(&ldp_com_header->version) != LDP_VERSION) {
514 printf("%sLDP version %u packet not supported",
515 (vflag < 1) ? "" : "\n\t",
516 EXTRACT_16BITS(&ldp_com_header->version));
517 return 0;
518 }
519
520 /* print the LSR-ID, label-space & length */
521 pdu_len = EXTRACT_16BITS(&ldp_com_header->pdu_length);
522 printf("%sLDP, Label-Space-ID: %s:%u, pdu-length: %u",
523 (vflag < 1) ? "" : "\n\t",
524 ipaddr_string(&ldp_com_header->lsr_id),
525 EXTRACT_16BITS(&ldp_com_header->label_space),
526 pdu_len);
527
528 /* bail out if non-verbose */
529 if (vflag < 1)
530 return 0;
531
532 /* ok they seem to want to know everything - lets fully decode it */
533 tlen=pdu_len;
534
535 tptr += sizeof(const struct ldp_common_header);
536 tlen -= sizeof(const struct ldp_common_header)-4; /* Type & Length fields not included */
537
538 while(tlen>0) {
539 /* did we capture enough for fully decoding the msg header ? */
540 if (!TTEST2(*tptr, sizeof(struct ldp_msg_header)))
541 goto trunc;
542
543 ldp_msg_header = (const struct ldp_msg_header *)tptr;
544 msg_len=EXTRACT_16BITS(ldp_msg_header->length);
545 msg_type=LDP_MASK_MSG_TYPE(EXTRACT_16BITS(ldp_msg_header->type));
546
547 /* FIXME vendor private / experimental check */
548 printf("\n\t %s Message (0x%04x), length: %u, Message ID: 0x%08x, Flags: [%s if unknown]",
549 tok2str(ldp_msg_values,
550 "Unknown",
551 msg_type),
552 msg_type,
553 msg_len,
554 EXTRACT_32BITS(&ldp_msg_header->id),
555 LDP_MASK_U_BIT(EXTRACT_16BITS(&ldp_msg_header->type)) ? "continue processing" : "ignore");
556
557 if (msg_len == 0) /* infinite loop protection */
558 return 0;
559
560 msg_tptr=tptr+sizeof(struct ldp_msg_header);
561 msg_tlen=msg_len-sizeof(struct ldp_msg_header)+4; /* Type & Length fields not included */
562
563 /* did we capture enough for fully decoding the message ? */
564 if (!TTEST2(*tptr, msg_len))
565 goto trunc;
566 hexdump=FALSE;
567
568 switch(msg_type) {
569
570 case LDP_MSG_NOTIF:
571 case LDP_MSG_HELLO:
572 case LDP_MSG_INIT:
573 case LDP_MSG_KEEPALIVE:
574 case LDP_MSG_ADDRESS:
575 case LDP_MSG_LABEL_MAPPING:
576 case LDP_MSG_ADDRESS_WITHDRAW:
577 case LDP_MSG_LABEL_WITHDRAW:
578 while(msg_tlen >= 4) {
579 processed = ldp_tlv_print(msg_tptr);
580 if (processed == 0)
581 break;
582 msg_tlen-=processed;
583 msg_tptr+=processed;
584 }
585 break;
586
587 /*
588 * FIXME those are the defined messages that lack a decoder
589 * you are welcome to contribute code ;-)
590 */
591
592 case LDP_MSG_LABEL_REQUEST:
593 case LDP_MSG_LABEL_RELEASE:
594 case LDP_MSG_LABEL_ABORT_REQUEST:
595
596 default:
597 if (vflag <= 1)
598 print_unknown_data(msg_tptr,"\n\t ",msg_tlen);
599 break;
600 }
601 /* do we want to see an additionally hexdump ? */
602 if (vflag > 1 || hexdump==TRUE)
603 print_unknown_data(tptr+sizeof(sizeof(struct ldp_msg_header)),"\n\t ",
604 msg_len);
605
606 tptr += msg_len+4;
607 tlen -= msg_len+4;
608 }
609 return pdu_len+4;
610trunc:
611 printf("\n\t\t packet exceeded snapshot");
612 return 0;
613}
614