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math.3: Mention f{max,min,dim}.
[dragonfly.git] / contrib / tcpdump / print-ldp.c
blobde3b34e5b54f94d264863f8286a1956ccd85901b
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
18 static const char rcsid[] _U_ =
19 "@(#) $Header: /tcpdump/master/tcpdump/print-ldp.c,v 1.20 2006-06-23 02:03:09 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
37 #include "l2vpn.h"
38 #include "af.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
55 struct 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
88 struct 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
114 static 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_ADDRESS_LIST_AFNUM_LEN 2
135 #define LDP_TLV_HOP_COUNT 0x0103
136 #define LDP_TLV_PATH_VECTOR 0x0104
137 #define LDP_TLV_GENERIC_LABEL 0x0200
138 #define LDP_TLV_ATM_LABEL 0x0201
139 #define LDP_TLV_FR_LABEL 0x0202
140 #define LDP_TLV_STATUS 0x0300
141 #define LDP_TLV_EXTD_STATUS 0x0301
142 #define LDP_TLV_RETURNED_PDU 0x0302
143 #define LDP_TLV_RETURNED_MSG 0x0303
144 #define LDP_TLV_COMMON_HELLO 0x0400
145 #define LDP_TLV_IPV4_TRANSPORT_ADDR 0x0401
146 #define LDP_TLV_CONFIG_SEQ_NUMBER 0x0402
147 #define LDP_TLV_IPV6_TRANSPORT_ADDR 0x0403
148 #define LDP_TLV_COMMON_SESSION 0x0500
149 #define LDP_TLV_ATM_SESSION_PARM 0x0501
150 #define LDP_TLV_FR_SESSION_PARM 0x0502
151 #define LDP_TLV_FT_SESSION 0x0503
152 #define LDP_TLV_LABEL_REQUEST_MSG_ID 0x0600
153 #define LDP_TLV_MTU 0x0601 /* rfc 3988 */
154
155 static const struct tok ldp_tlv_values[] = {
156 { LDP_TLV_FEC, "FEC" },
157 { LDP_TLV_ADDRESS_LIST, "Address List" },
158 { LDP_TLV_HOP_COUNT, "Hop Count" },
159 { LDP_TLV_PATH_VECTOR, "Path Vector" },
160 { LDP_TLV_GENERIC_LABEL, "Generic Label" },
161 { LDP_TLV_ATM_LABEL, "ATM Label" },
162 { LDP_TLV_FR_LABEL, "Frame-Relay Label" },
163 { LDP_TLV_STATUS, "Status" },
164 { LDP_TLV_EXTD_STATUS, "Extended Status" },
165 { LDP_TLV_RETURNED_PDU, "Returned PDU" },
166 { LDP_TLV_RETURNED_MSG, "Returned Message" },
167 { LDP_TLV_COMMON_HELLO, "Common Hello Parameters" },
168 { LDP_TLV_IPV4_TRANSPORT_ADDR, "IPv4 Transport Address" },
169 { LDP_TLV_CONFIG_SEQ_NUMBER, "Configuration Sequence Number" },
170 { LDP_TLV_IPV6_TRANSPORT_ADDR, "IPv6 Transport Address" },
171 { LDP_TLV_COMMON_SESSION, "Common Session Parameters" },
172 { LDP_TLV_ATM_SESSION_PARM, "ATM Session Parameters" },
173 { LDP_TLV_FR_SESSION_PARM, "Frame-Relay Session Parameters" },
174 { LDP_TLV_FT_SESSION, "Fault-Tolerant Session Parameters" },
175 { LDP_TLV_LABEL_REQUEST_MSG_ID, "Label Request Message ID" },
176 { LDP_TLV_MTU, "MTU" },
177 { 0, NULL}
178 };
179
180 #define LDP_FEC_WILDCARD 0x01
181 #define LDP_FEC_PREFIX 0x02
182 #define LDP_FEC_HOSTADDRESS 0x03
183 /* From draft-martini-l2circuit-trans-mpls-13.txt */
184 #define LDP_FEC_MARTINI_VC 0x80
185
186 static const struct tok ldp_fec_values[] = {
187 { LDP_FEC_WILDCARD, "Wildcard" },
188 { LDP_FEC_PREFIX, "Prefix" },
189 { LDP_FEC_HOSTADDRESS, "Host address" },
190 { LDP_FEC_MARTINI_VC, "Martini VC" },
191 { 0, NULL}
192 };
193
194 #define LDP_FEC_MARTINI_IFPARM_MTU 0x01
195 #define LDP_FEC_MARTINI_IFPARM_DESC 0x03
196 #define LDP_FEC_MARTINI_IFPARM_VCCV 0x0c
197
198 static const struct tok ldp_fec_martini_ifparm_values[] = {
199 { LDP_FEC_MARTINI_IFPARM_MTU, "MTU" },
200 { LDP_FEC_MARTINI_IFPARM_DESC, "Description" },
201 { LDP_FEC_MARTINI_IFPARM_VCCV, "VCCV" },
202 { 0, NULL}
203 };
204
205 /* draft-ietf-pwe3-vccv-04.txt */
206 static const struct tok ldp_fec_martini_ifparm_vccv_cc_values[] = {
207 { 0x01, "PWE3 control word" },
208 { 0x02, "MPLS Router Alert Label" },
209 { 0x04, "MPLS inner label TTL = 1" },
210 { 0, NULL}
211 };
212
213 /* draft-ietf-pwe3-vccv-04.txt */
214 static const struct tok ldp_fec_martini_ifparm_vccv_cv_values[] = {
215 { 0x01, "ICMP Ping" },
216 { 0x02, "LSP Ping" },
217 { 0x04, "BFD" },
218 { 0, NULL}
219 };
220
221 int ldp_msg_print(register const u_char *);
222 int ldp_tlv_print(register const u_char *);
223
224 /*
225 * ldp tlv header
226 *
227 * 0 1 2 3
228 * 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
229 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
230 * |U|F| Type | Length |
231 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
232 * | |
233 * | Value |
234 * ~ ~
235 * | |
236 * | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
237 * | |
238 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
239 */
240
241 int
242 ldp_tlv_print(register const u_char *tptr) {
243
244 struct ldp_tlv_header {
245 u_int8_t type[2];
246 u_int8_t length[2];
247 };
248
249 const struct ldp_tlv_header *ldp_tlv_header;
250 u_short tlv_type,tlv_len,tlv_tlen,af,ft_flags;
251 u_char fec_type;
252 u_int ui,vc_info_len, vc_info_tlv_type, vc_info_tlv_len,idx;
253 char buf[100];
254 int i;
255
256 ldp_tlv_header = (const struct ldp_tlv_header *)tptr;
257 tlv_len=EXTRACT_16BITS(ldp_tlv_header->length);
258 tlv_tlen=tlv_len;
259 tlv_type=LDP_MASK_TLV_TYPE(EXTRACT_16BITS(ldp_tlv_header->type));
260
261 /* FIXME vendor private / experimental check */
262 printf("\n\t %s TLV (0x%04x), length: %u, Flags: [%s and %s forward if unknown]",
263 tok2str(ldp_tlv_values,
264 "Unknown",
265 tlv_type),
266 tlv_type,
267 tlv_len,
268 LDP_MASK_U_BIT(EXTRACT_16BITS(&ldp_tlv_header->type)) ? "continue processing" : "ignore",
269 LDP_MASK_F_BIT(EXTRACT_16BITS(&ldp_tlv_header->type)) ? "do" : "don't");
270
271 tptr+=sizeof(struct ldp_tlv_header);
272
273 switch(tlv_type) {
274
275 case LDP_TLV_COMMON_HELLO:
276 printf("\n\t Hold Time: %us, Flags: [%s Hello%s]",
277 EXTRACT_16BITS(tptr),
278 (EXTRACT_16BITS(tptr+2)&0x8000) ? "Targeted" : "Link",
279 (EXTRACT_16BITS(tptr+2)&0x4000) ? ", Request for targeted Hellos" : "");
280 break;
281
282 case LDP_TLV_IPV4_TRANSPORT_ADDR:
283 printf("\n\t IPv4 Transport Address: %s", ipaddr_string(tptr));
284 break;
285 #ifdef INET6
286 case LDP_TLV_IPV6_TRANSPORT_ADDR:
287 printf("\n\t IPv6 Transport Address: %s", ip6addr_string(tptr));
288 break;
289 #endif
290 case LDP_TLV_CONFIG_SEQ_NUMBER:
291 printf("\n\t Sequence Number: %u", EXTRACT_32BITS(tptr));
292 break;
293
294 case LDP_TLV_ADDRESS_LIST:
295 af = EXTRACT_16BITS(tptr);
296 tptr+=LDP_TLV_ADDRESS_LIST_AFNUM_LEN;
297 tlv_tlen -= LDP_TLV_ADDRESS_LIST_AFNUM_LEN;
298 printf("\n\t Address Family: %s, addresses",
299 tok2str(af_values, "Unknown (%u)", af));
300 switch (af) {
301 case AFNUM_INET:
302 while(tlv_tlen >= sizeof(struct in_addr)) {
303 printf(" %s",ipaddr_string(tptr));
304 tlv_tlen-=sizeof(struct in_addr);
305 tptr+=sizeof(struct in_addr);
306 }
307 break;
308 #ifdef INET6
309 case AFNUM_INET6:
310 while(tlv_tlen >= sizeof(struct in6_addr)) {
311 printf(" %s",ip6addr_string(tptr));
312 tlv_tlen-=sizeof(struct in6_addr);
313 tptr+=sizeof(struct in6_addr);
314 }
315 break;
316 #endif
317 default:
318 /* unknown AF */
319 break;
320 }
321 break;
322
323 case LDP_TLV_COMMON_SESSION:
324 printf("\n\t Version: %u, Keepalive: %us, Flags: [Downstream %s, Loop Detection %s]",
325 EXTRACT_16BITS(tptr), EXTRACT_16BITS(tptr+2),
326 (EXTRACT_16BITS(tptr+6)&0x8000) ? "On Demand" : "Unsolicited",
327 (EXTRACT_16BITS(tptr+6)&0x4000) ? "Enabled" : "Disabled"
328 );
329 break;
330
331 case LDP_TLV_FEC:
332 fec_type = *tptr;
333 printf("\n\t %s FEC (0x%02x)",
334 tok2str(ldp_fec_values, "Unknown", fec_type),
335 fec_type);
336
337 tptr+=1;
338 switch(fec_type) {
339
340 case LDP_FEC_WILDCARD:
341 break;
342 case LDP_FEC_PREFIX:
343 af = EXTRACT_16BITS(tptr);
344 tptr+=2;
345 if (af == AFNUM_INET) {
346 i=decode_prefix4(tptr,buf,sizeof(buf));
347 printf(": IPv4 prefix %s",buf);
348 }
349 #ifdef INET6
350 else if (af == AFNUM_INET6) {
351 i=decode_prefix6(tptr,buf,sizeof(buf));
352 printf(": IPv6 prefix %s",buf);
353 }
354 #endif
355 break;
356 case LDP_FEC_HOSTADDRESS:
357 break;
358 case LDP_FEC_MARTINI_VC:
359 if (!TTEST2(*tptr, 11))
360 goto trunc;
361 vc_info_len = *(tptr+2);
362
363 printf(": %s, %scontrol word, group-ID %u, VC-ID %u, VC-info-length: %u",
364 tok2str(l2vpn_encaps_values, "Unknown", EXTRACT_16BITS(tptr)&0x7fff),
365 EXTRACT_16BITS(tptr)&0x8000 ? "" : "no ",
366 EXTRACT_32BITS(tptr+3),
367 EXTRACT_32BITS(tptr+7),
368 vc_info_len);
369
370 if (vc_info_len == 0) /* infinite loop protection */
371 break;
372
373 tptr+=11;
374 if (!TTEST2(*tptr, vc_info_len))
375 goto trunc;
376
377 while (vc_info_len > 2) {
378 vc_info_tlv_type = *tptr;
379 vc_info_tlv_len = *(tptr+1);
380 if (vc_info_tlv_len < 2)
381 break;
382 if (vc_info_len < vc_info_tlv_len)
383 break;
384
385 printf("\n\t\tInterface Parameter: %s (0x%02x), len %u",
386 tok2str(ldp_fec_martini_ifparm_values,"Unknown",vc_info_tlv_type),
387 vc_info_tlv_type,
388 vc_info_tlv_len);
389
390 switch(vc_info_tlv_type) {
391 case LDP_FEC_MARTINI_IFPARM_MTU:
392 printf(": %u",EXTRACT_16BITS(tptr+2));
393 break;
394
395 case LDP_FEC_MARTINI_IFPARM_DESC:
396 printf(": ");
397 for (idx = 2; idx < vc_info_tlv_len; idx++)
398 safeputchar(*(tptr+idx));
399 break;
400
401 case LDP_FEC_MARTINI_IFPARM_VCCV:
402 printf("\n\t\t Control Channels (0x%02x) = [%s]",
403 *(tptr+2),
404 bittok2str(ldp_fec_martini_ifparm_vccv_cc_values,"none",*(tptr+2)));
405 printf("\n\t\t CV Types (0x%02x) = [%s]",
406 *(tptr+3),
407 bittok2str(ldp_fec_martini_ifparm_vccv_cv_values,"none",*(tptr+3)));
408 break;
409
410 default:
411 print_unknown_data(tptr+2,"\n\t\t ",vc_info_tlv_len-2);
412 break;
413 }
414
415 vc_info_len -= vc_info_tlv_len;
416 tptr += vc_info_tlv_len;
417 }
418 break;
419 }
420
421 break;
422
423 case LDP_TLV_GENERIC_LABEL:
424 printf("\n\t Label: %u", EXTRACT_32BITS(tptr) & 0xfffff);
425 break;
426
427 case LDP_TLV_STATUS:
428 ui = EXTRACT_32BITS(tptr);
429 tptr+=4;
430 printf("\n\t Status: 0x%02x, Flags: [%s and %s forward]",
431 ui&0x3fffffff,
432 ui&0x80000000 ? "Fatal error" : "Advisory Notification",
433 ui&0x40000000 ? "do" : "don't");
434 ui = EXTRACT_32BITS(tptr);
435 tptr+=4;
436 if (ui)
437 printf(", causing Message ID: 0x%08x", ui);
438 break;
439
440 case LDP_TLV_FT_SESSION:
441 ft_flags = EXTRACT_16BITS(tptr);
442 printf("\n\t Flags: [%sReconnect, %sSave State, %sAll-Label Protection, %s Checkpoint, %sRe-Learn State]",
443 ft_flags&0x8000 ? "" : "No ",
444 ft_flags&0x8 ? "" : "Don't ",
445 ft_flags&0x4 ? "" : "No ",
446 ft_flags&0x2 ? "Sequence Numbered Label" : "All Labels",
447 ft_flags&0x1 ? "" : "Don't ");
448 tptr+=4;
449 ui = EXTRACT_32BITS(tptr);
450 if (ui)
451 printf(", Reconnect Timeout: %ums", ui);
452 tptr+=4;
453 ui = EXTRACT_32BITS(tptr);
454 if (ui)
455 printf(", Recovery Time: %ums", ui);
456 break;
457
458 case LDP_TLV_MTU:
459 printf("\n\t MTU: %u", EXTRACT_16BITS(tptr));
460 break;
461
462
463 /*
464 * FIXME those are the defined TLVs that lack a decoder
465 * you are welcome to contribute code ;-)
466 */
467
468 case LDP_TLV_HOP_COUNT:
469 case LDP_TLV_PATH_VECTOR:
470 case LDP_TLV_ATM_LABEL:
471 case LDP_TLV_FR_LABEL:
472 case LDP_TLV_EXTD_STATUS:
473 case LDP_TLV_RETURNED_PDU:
474 case LDP_TLV_RETURNED_MSG:
475 case LDP_TLV_ATM_SESSION_PARM:
476 case LDP_TLV_FR_SESSION_PARM:
477 case LDP_TLV_LABEL_REQUEST_MSG_ID:
478
479 default:
480 if (vflag <= 1)
481 print_unknown_data(tptr,"\n\t ",tlv_tlen);
482 break;
483 }
484 return(tlv_len+4); /* Type & Length fields not included */
485
486 trunc:
487 printf("\n\t\t packet exceeded snapshot");
488 return 0;
489 }
490
491 void
492 ldp_print(register const u_char *pptr, register u_int len) {
493
494 int processed;
495 while (len > (sizeof(struct ldp_common_header) + sizeof(struct ldp_msg_header))) {
496 processed = ldp_msg_print(pptr);
497 if (processed == 0)
498 return;
499 len -= processed;
500 pptr += processed;
501 }
502 }
503
504
505 int
506 ldp_msg_print(register const u_char *pptr) {
507
508 const struct ldp_common_header *ldp_com_header;
509 const struct ldp_msg_header *ldp_msg_header;
510 const u_char *tptr,*msg_tptr;
511 u_short tlen;
512 u_short pdu_len,msg_len,msg_type,msg_tlen;
513 int hexdump,processed;
514
515 tptr=pptr;
516 ldp_com_header = (const struct ldp_common_header *)pptr;
517 TCHECK(*ldp_com_header);
518
519 /*
520 * Sanity checking of the header.
521 */
522 if (EXTRACT_16BITS(&ldp_com_header->version) != LDP_VERSION) {
523 printf("%sLDP version %u packet not supported",
524 (vflag < 1) ? "" : "\n\t",
525 EXTRACT_16BITS(&ldp_com_header->version));
526 return 0;
527 }
528
529 /* print the LSR-ID, label-space & length */
530 pdu_len = EXTRACT_16BITS(&ldp_com_header->pdu_length);
531 printf("%sLDP, Label-Space-ID: %s:%u, pdu-length: %u",
532 (vflag < 1) ? "" : "\n\t",
533 ipaddr_string(&ldp_com_header->lsr_id),
534 EXTRACT_16BITS(&ldp_com_header->label_space),
535 pdu_len);
536
537 /* bail out if non-verbose */
538 if (vflag < 1)
539 return 0;
540
541 /* ok they seem to want to know everything - lets fully decode it */
542 tlen=pdu_len;
543
544 tptr += sizeof(const struct ldp_common_header);
545 tlen -= sizeof(const struct ldp_common_header)-4; /* Type & Length fields not included */
546
547 while(tlen>0) {
548 /* did we capture enough for fully decoding the msg header ? */
549 if (!TTEST2(*tptr, sizeof(struct ldp_msg_header)))
550 goto trunc;
551
552 ldp_msg_header = (const struct ldp_msg_header *)tptr;
553 msg_len=EXTRACT_16BITS(ldp_msg_header->length);
554 msg_type=LDP_MASK_MSG_TYPE(EXTRACT_16BITS(ldp_msg_header->type));
555
556 /* FIXME vendor private / experimental check */
557 printf("\n\t %s Message (0x%04x), length: %u, Message ID: 0x%08x, Flags: [%s if unknown]",
558 tok2str(ldp_msg_values,
559 "Unknown",
560 msg_type),
561 msg_type,
562 msg_len,
563 EXTRACT_32BITS(&ldp_msg_header->id),
564 LDP_MASK_U_BIT(EXTRACT_16BITS(&ldp_msg_header->type)) ? "continue processing" : "ignore");
565
566 if (msg_len == 0) /* infinite loop protection */
567 return 0;
568
569 msg_tptr=tptr+sizeof(struct ldp_msg_header);
570 msg_tlen=msg_len-sizeof(struct ldp_msg_header)+4; /* Type & Length fields not included */
571
572 /* did we capture enough for fully decoding the message ? */
573 if (!TTEST2(*tptr, msg_len))
574 goto trunc;
575 hexdump=FALSE;
576
577 switch(msg_type) {
578
579 case LDP_MSG_NOTIF:
580 case LDP_MSG_HELLO:
581 case LDP_MSG_INIT:
582 case LDP_MSG_KEEPALIVE:
583 case LDP_MSG_ADDRESS:
584 case LDP_MSG_LABEL_MAPPING:
585 case LDP_MSG_ADDRESS_WITHDRAW:
586 case LDP_MSG_LABEL_WITHDRAW:
587 while(msg_tlen >= 4) {
588 processed = ldp_tlv_print(msg_tptr);
589 if (processed == 0)
590 break;
591 msg_tlen-=processed;
592 msg_tptr+=processed;
593 }
594 break;
595
596 /*
597 * FIXME those are the defined messages that lack a decoder
598 * you are welcome to contribute code ;-)
599 */
600
601 case LDP_MSG_LABEL_REQUEST:
602 case LDP_MSG_LABEL_RELEASE:
603 case LDP_MSG_LABEL_ABORT_REQUEST:
604
605 default:
606 if (vflag <= 1)
607 print_unknown_data(msg_tptr,"\n\t ",msg_tlen);
608 break;
609 }
610 /* do we want to see an additionally hexdump ? */
611 if (vflag > 1 || hexdump==TRUE)
612 print_unknown_data(tptr+sizeof(sizeof(struct ldp_msg_header)),"\n\t ",
613 msg_len);
614
615 tptr += msg_len+4;
616 tlen -= msg_len+4;
617 }
618 return pdu_len+4;
619 trunc:
620 printf("\n\t\t packet exceeded snapshot");
621 return 0;
622 }
623
DragonFly BSD