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some more minor stuff and a lot of debugging stuff that will be removed later.
[dragonfly/vkernel-mp.git] / contrib / tcpdump-3.9 / print-ldp.c
blobdeb8a94d273d366226fdd722d238bb8d8f2b1195
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 1.8.2.9 2006/06/23 02:07:27 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
39 /*
40 * ldp common header
41 *
42 * 0 1 2 3
43 * 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
44 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
45 * | Version | PDU Length |
46 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
47 * | LDP Identifier |
48 * + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
49 * | |
50 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
51 *
52 */
53
54 struct ldp_common_header {
55 u_int8_t version[2];
56 u_int8_t pdu_length[2];
57 u_int8_t lsr_id[4];
58 u_int8_t label_space[2];
59 };
60
61 #define LDP_VERSION 1
62
63 /*
64 * ldp message header
65 *
66 * 0 1 2 3
67 * 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
68 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
69 * |U| Message Type | Message Length |
70 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
71 * | Message ID |
72 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
73 * | |
74 * + +
75 * | Mandatory Parameters |
76 * + +
77 * | |
78 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
79 * | |
80 * + +
81 * | Optional Parameters |
82 * + +
83 * | |
84 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
85 */
86
87 struct ldp_msg_header {
88 u_int8_t type[2];
89 u_int8_t length[2];
90 u_int8_t id[4];
91 };
92
93 #define LDP_MASK_MSG_TYPE(x) ((x)&0x7fff)
94 #define LDP_MASK_U_BIT(x) ((x)&0x8000)
95
96 #define LDP_MSG_NOTIF 0x0001
97 #define LDP_MSG_HELLO 0x0100
98 #define LDP_MSG_INIT 0x0200
99 #define LDP_MSG_KEEPALIVE 0x0201
100 #define LDP_MSG_ADDRESS 0x0300
101 #define LDP_MSG_ADDRESS_WITHDRAW 0x0301
102 #define LDP_MSG_LABEL_MAPPING 0x0400
103 #define LDP_MSG_LABEL_REQUEST 0x0401
104 #define LDP_MSG_LABEL_WITHDRAW 0x0402
105 #define LDP_MSG_LABEL_RELEASE 0x0403
106 #define LDP_MSG_LABEL_ABORT_REQUEST 0x0404
107
108 #define LDP_VENDOR_PRIVATE_MIN 0x3e00
109 #define LDP_VENDOR_PRIVATE_MAX 0x3eff
110 #define LDP_EXPERIMENTAL_MIN 0x3f00
111 #define LDP_EXPERIMENTAL_MAX 0x3fff
112
113 static const struct tok ldp_msg_values[] = {
114 { LDP_MSG_NOTIF, "Notification" },
115 { LDP_MSG_HELLO, "Hello" },
116 { LDP_MSG_INIT, "Initialization" },
117 { LDP_MSG_KEEPALIVE, "Keepalive" },
118 { LDP_MSG_ADDRESS, "Address" },
119 { LDP_MSG_ADDRESS_WITHDRAW, "Address Withdraw" },
120 { LDP_MSG_LABEL_MAPPING, "Label Mapping" },
121 { LDP_MSG_LABEL_REQUEST, "Label Request" },
122 { LDP_MSG_LABEL_WITHDRAW, "Label Withdraw" },
123 { LDP_MSG_LABEL_RELEASE, "Label Release" },
124 { LDP_MSG_LABEL_ABORT_REQUEST, "Label Abort Request" },
125 { 0, NULL}
126 };
127
128 #define LDP_MASK_TLV_TYPE(x) ((x)&0x3fff)
129 #define LDP_MASK_F_BIT(x) ((x)&0x4000)
130
131 #define LDP_TLV_FEC 0x0100
132 #define LDP_TLV_ADDRESS_LIST 0x0101
133 #define LDP_TLV_HOP_COUNT 0x0103
134 #define LDP_TLV_PATH_VECTOR 0x0104
135 #define LDP_TLV_GENERIC_LABEL 0x0200
136 #define LDP_TLV_ATM_LABEL 0x0201
137 #define LDP_TLV_FR_LABEL 0x0202
138 #define LDP_TLV_STATUS 0x0300
139 #define LDP_TLV_EXTD_STATUS 0x0301
140 #define LDP_TLV_RETURNED_PDU 0x0302
141 #define LDP_TLV_RETURNED_MSG 0x0303
142 #define LDP_TLV_COMMON_HELLO 0x0400
143 #define LDP_TLV_IPV4_TRANSPORT_ADDR 0x0401
144 #define LDP_TLV_CONFIG_SEQ_NUMBER 0x0402
145 #define LDP_TLV_IPV6_TRANSPORT_ADDR 0x0403
146 #define LDP_TLV_COMMON_SESSION 0x0500
147 #define LDP_TLV_ATM_SESSION_PARM 0x0501
148 #define LDP_TLV_FR_SESSION_PARM 0x0502
149 #define LDP_TLV_FT_SESSION 0x0503
150 #define LDP_TLV_LABEL_REQUEST_MSG_ID 0x0600
151
152 static const struct tok ldp_tlv_values[] = {
153 { LDP_TLV_FEC, "FEC" },
154 { LDP_TLV_ADDRESS_LIST, "Address List" },
155 { LDP_TLV_HOP_COUNT, "Hop Count" },
156 { LDP_TLV_PATH_VECTOR, "Path Vector" },
157 { LDP_TLV_GENERIC_LABEL, "Generic Label" },
158 { LDP_TLV_ATM_LABEL, "ATM Label" },
159 { LDP_TLV_FR_LABEL, "Frame-Relay Label" },
160 { LDP_TLV_STATUS, "Status" },
161 { LDP_TLV_EXTD_STATUS, "Extended Status" },
162 { LDP_TLV_RETURNED_PDU, "Returned PDU" },
163 { LDP_TLV_RETURNED_MSG, "Returned Message" },
164 { LDP_TLV_COMMON_HELLO, "Common Hello Parameters" },
165 { LDP_TLV_IPV4_TRANSPORT_ADDR, "IPv4 Transport Address" },
166 { LDP_TLV_CONFIG_SEQ_NUMBER, "Configuration Sequence Number" },
167 { LDP_TLV_IPV6_TRANSPORT_ADDR, "IPv6 Transport Address" },
168 { LDP_TLV_COMMON_SESSION, "Common Session Parameters" },
169 { LDP_TLV_ATM_SESSION_PARM, "ATM Session Parameters" },
170 { LDP_TLV_FR_SESSION_PARM, "Frame-Relay Session Parameters" },
171 { LDP_TLV_FT_SESSION, "Fault-Tolerant Session Parameters" },
172 { LDP_TLV_LABEL_REQUEST_MSG_ID, "Label Request Message ID" },
173 { 0, NULL}
174 };
175
176 #define LDP_FEC_WILDCARD 0x01
177 #define LDP_FEC_PREFIX 0x02
178 #define LDP_FEC_HOSTADDRESS 0x03
179 /* From draft-martini-l2circuit-trans-mpls-13.txt */
180 #define LDP_FEC_MARTINI_VC 0x80
181
182 static const struct tok ldp_fec_values[] = {
183 { LDP_FEC_WILDCARD, "Wildcard" },
184 { LDP_FEC_PREFIX, "Prefix" },
185 { LDP_FEC_HOSTADDRESS, "Host address" },
186 { LDP_FEC_MARTINI_VC, "Martini VC" },
187 { 0, NULL}
188 };
189
190 #define LDP_FEC_MARTINI_IFPARM_MTU 0x01
191 #define LDP_FEC_MARTINI_IFPARM_DESC 0x03
192 #define LDP_FEC_MARTINI_IFPARM_VCCV 0x0c
193
194 static const struct tok ldp_fec_martini_ifparm_values[] = {
195 { LDP_FEC_MARTINI_IFPARM_MTU, "MTU" },
196 { LDP_FEC_MARTINI_IFPARM_DESC, "Description" },
197 { LDP_FEC_MARTINI_IFPARM_VCCV, "VCCV" },
198 { 0, NULL}
199 };
200
201 /* draft-ietf-pwe3-vccv-04.txt */
202 static const struct tok ldp_fec_martini_ifparm_vccv_cc_values[] = {
203 { 0x01, "PWE3 control word" },
204 { 0x02, "MPLS Router Alert Label" },
205 { 0x04, "MPLS inner label TTL = 1" },
206 { 0, NULL}
207 };
208
209 /* draft-ietf-pwe3-vccv-04.txt */
210 static const struct tok ldp_fec_martini_ifparm_vccv_cv_values[] = {
211 { 0x01, "ICMP Ping" },
212 { 0x02, "LSP Ping" },
213 { 0x04, "BFD" },
214 { 0, NULL}
215 };
216
217 /* RFC1700 address family numbers, same definition in print-bgp.c */
218 /* FIXME: move all AF stuff into dedicated files */
219 #define AFNUM_INET 1
220 #define AFNUM_INET6 2
221 #define AFNUM_LEN 2
222
223 int ldp_msg_print(register const u_char *);
224 int ldp_tlv_print(register const u_char *);
225
226 /*
227 * ldp tlv header
228 *
229 * 0 1 2 3
230 * 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
231 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
232 * |U|F| Type | Length |
233 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
234 * | |
235 * | Value |
236 * ~ ~
237 * | |
238 * | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
239 * | |
240 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
241 */
242
243 int
244 ldp_tlv_print(register const u_char *tptr) {
245
246 struct ldp_tlv_header {
247 u_int8_t type[2];
248 u_int8_t length[2];
249 };
250
251 const struct ldp_tlv_header *ldp_tlv_header;
252 u_short tlv_type,tlv_len,tlv_tlen,af,ft_flags;
253 u_char fec_type;
254 u_int ui,vc_info_len, vc_info_tlv_type, vc_info_tlv_len,idx;
255 char buf[100];
256 int i;
257
258 ldp_tlv_header = (const struct ldp_tlv_header *)tptr;
259 tlv_len=EXTRACT_16BITS(ldp_tlv_header->length);
260 tlv_tlen=tlv_len;
261 tlv_type=LDP_MASK_TLV_TYPE(EXTRACT_16BITS(ldp_tlv_header->type));
262
263 /* FIXME vendor private / experimental check */
264 printf("\n\t %s TLV (0x%04x), length: %u, Flags: [%s and %s forward if unknown]",
265 tok2str(ldp_tlv_values,
266 "Unknown",
267 tlv_type),
268 tlv_type,
269 tlv_len,
270 LDP_MASK_U_BIT(EXTRACT_16BITS(&ldp_tlv_header->type)) ? "continue processing" : "ignore",
271 LDP_MASK_F_BIT(EXTRACT_16BITS(&ldp_tlv_header->type)) ? "do" : "don't");
272
273 tptr+=sizeof(struct ldp_tlv_header);
274
275 switch(tlv_type) {
276
277 case LDP_TLV_COMMON_HELLO:
278 printf("\n\t Hold Time: %us, Flags: [%s Hello%s]",
279 EXTRACT_16BITS(tptr),
280 (EXTRACT_16BITS(tptr+2)&0x8000) ? "Targeted" : "Link",
281 (EXTRACT_16BITS(tptr+2)&0x4000) ? ", Request for targeted Hellos" : "");
282 break;
283
284 case LDP_TLV_IPV4_TRANSPORT_ADDR:
285 printf("\n\t IPv4 Transport Address: %s", ipaddr_string(tptr));
286 break;
287 #ifdef INET6
288 case LDP_TLV_IPV6_TRANSPORT_ADDR:
289 printf("\n\t IPv6 Transport Address: %s", ip6addr_string(tptr));
290 break;
291 #endif
292 case LDP_TLV_CONFIG_SEQ_NUMBER:
293 printf("\n\t Sequence Number: %u", EXTRACT_32BITS(tptr));
294 break;
295
296 case LDP_TLV_ADDRESS_LIST:
297 af = EXTRACT_16BITS(tptr);
298 tptr+=AFNUM_LEN;
299 tlv_tlen -= AFNUM_LEN;
300 printf("\n\t Address Family: ");
301 if (af == AFNUM_INET) {
302 printf("IPv4, addresses:");
303 while(tlv_tlen >= sizeof(struct in_addr)) {
304 printf(" %s",ipaddr_string(tptr));
305 tlv_tlen-=sizeof(struct in_addr);
306 tptr+=sizeof(struct in_addr);
307 }
308 }
309 #ifdef INET6
310 else if (af == AFNUM_INET6) {
311 printf("IPv6, addresses:");
312 while(tlv_tlen >= sizeof(struct in6_addr)) {
313 printf(" %s",ip6addr_string(tptr));
314 tlv_tlen-=sizeof(struct in6_addr);
315 tptr+=sizeof(struct in6_addr);
316 }
317 }
318 #endif
319 break;
320
321 case LDP_TLV_COMMON_SESSION:
322 printf("\n\t Version: %u, Keepalive: %us, Flags: [Downstream %s, Loop Detection %s]",
323 EXTRACT_16BITS(tptr), EXTRACT_16BITS(tptr+2),
324 (EXTRACT_16BITS(tptr+6)&0x8000) ? "On Demand" : "Unsolicited",
325 (EXTRACT_16BITS(tptr+6)&0x4000) ? "Enabled" : "Disabled"
326 );
327 break;
328
329 case LDP_TLV_FEC:
330 fec_type = *tptr;
331 printf("\n\t %s FEC (0x%02x)",
332 tok2str(ldp_fec_values, "Unknown", fec_type),
333 fec_type);
334
335 tptr+=1;
336 switch(fec_type) {
337
338 case LDP_FEC_WILDCARD:
339 break;
340 case LDP_FEC_PREFIX:
341 af = EXTRACT_16BITS(tptr);
342 tptr+=2;
343 if (af == AFNUM_INET) {
344 i=decode_prefix4(tptr,buf,sizeof(buf));
345 printf(": IPv4 prefix %s",buf);
346 }
347 #ifdef INET6
348 else if (af == AFNUM_INET6) {
349 i=decode_prefix6(tptr,buf,sizeof(buf));
350 printf(": IPv6 prefix %s",buf);
351 }
352 #endif
353 break;
354 case LDP_FEC_HOSTADDRESS:
355 break;
356 case LDP_FEC_MARTINI_VC:
357 if (!TTEST2(*tptr, 11))
358 goto trunc;
359 vc_info_len = *(tptr+2);
360
361 printf(": %s, %scontrol word, group-ID %u, VC-ID %u, VC-info-length: %u",
362 tok2str(l2vpn_encaps_values, "Unknown", EXTRACT_16BITS(tptr)&0x7fff),
363 EXTRACT_16BITS(tptr)&0x8000 ? "" : "no ",
364 EXTRACT_32BITS(tptr+3),
365 EXTRACT_32BITS(tptr+7),
366 vc_info_len);
367
368 if (vc_info_len == 0) /* infinite loop protection */
369 break;
370
371 tptr+=11;
372 if (!TTEST2(*tptr, vc_info_len))
373 goto trunc;
374
375 while (vc_info_len > 2) {
376 vc_info_tlv_type = *tptr;
377 vc_info_tlv_len = *(tptr+1);
378 if (vc_info_tlv_len < 2)
379 break;
380 if (vc_info_len < vc_info_tlv_len)
381 break;
382
383 printf("\n\t\tInterface Parameter: %s (0x%02x), len %u",
384 tok2str(ldp_fec_martini_ifparm_values,"Unknown",vc_info_tlv_type),
385 vc_info_tlv_type,
386 vc_info_tlv_len);
387
388 switch(vc_info_tlv_type) {
389 case LDP_FEC_MARTINI_IFPARM_MTU:
390 printf(": %u",EXTRACT_16BITS(tptr+2));
391 break;
392
393 case LDP_FEC_MARTINI_IFPARM_DESC:
394 printf(": ");
395 for (idx = 2; idx < vc_info_tlv_len; idx++)
396 safeputchar(*(tptr+idx));
397 break;
398
399 case LDP_FEC_MARTINI_IFPARM_VCCV:
400 printf("\n\t\t Control Channels (0x%02x) = [%s]",
401 *(tptr+2),
402 bittok2str(ldp_fec_martini_ifparm_vccv_cc_values,"none",*(tptr+2)));
403 printf("\n\t\t CV Types (0x%02x) = [%s]",
404 *(tptr+3),
405 bittok2str(ldp_fec_martini_ifparm_vccv_cv_values,"none",*(tptr+3)));
406 break;
407
408 default:
409 print_unknown_data(tptr+2,"\n\t\t ",vc_info_tlv_len-2);
410 break;
411 }
412
413 vc_info_len -= vc_info_tlv_len;
414 tptr += vc_info_tlv_len;
415 }
416 break;
417 }
418
419 break;
420
421 case LDP_TLV_GENERIC_LABEL:
422 printf("\n\t Label: %u", EXTRACT_32BITS(tptr) & 0xfffff);
423 break;
424
425 case LDP_TLV_STATUS:
426 ui = EXTRACT_32BITS(tptr);
427 tptr+=4;
428 printf("\n\t Status: 0x%02x, Flags: [%s and %s forward]",
429 ui&0x3fffffff,
430 ui&0x80000000 ? "Fatal error" : "Advisory Notification",
431 ui&0x40000000 ? "do" : "don't");
432 ui = EXTRACT_32BITS(tptr);
433 tptr+=4;
434 if (ui)
435 printf(", causing Message ID: 0x%08x", ui);
436 break;
437
438 case LDP_TLV_FT_SESSION:
439 ft_flags = EXTRACT_16BITS(tptr);
440 printf("\n\t Flags: [%sReconnect, %sSave State, %sAll-Label Protection, %s Checkpoint, %sRe-Learn State]",
441 ft_flags&0x8000 ? "" : "No ",
442 ft_flags&0x8 ? "" : "Don't ",
443 ft_flags&0x4 ? "" : "No ",
444 ft_flags&0x2 ? "Sequence Numbered Label" : "All Labels",
445 ft_flags&0x1 ? "" : "Don't ");
446 tptr+=4;
447 ui = EXTRACT_32BITS(tptr);
448 if (ui)
449 printf(", Reconnect Timeout: %ums", ui);
450 tptr+=4;
451 ui = EXTRACT_32BITS(tptr);
452 if (ui)
453 printf(", Recovery Time: %ums", ui);
454 break;
455
456
457 /*
458 * FIXME those are the defined TLVs that lack a decoder
459 * you are welcome to contribute code ;-)
460 */
461
462 case LDP_TLV_HOP_COUNT:
463 case LDP_TLV_PATH_VECTOR:
464 case LDP_TLV_ATM_LABEL:
465 case LDP_TLV_FR_LABEL:
466 case LDP_TLV_EXTD_STATUS:
467 case LDP_TLV_RETURNED_PDU:
468 case LDP_TLV_RETURNED_MSG:
469 case LDP_TLV_ATM_SESSION_PARM:
470 case LDP_TLV_FR_SESSION_PARM:
471 case LDP_TLV_LABEL_REQUEST_MSG_ID:
472
473 default:
474 if (vflag <= 1)
475 print_unknown_data(tptr,"\n\t ",tlv_tlen);
476 break;
477 }
478 return(tlv_len+4); /* Type & Length fields not included */
479
480 trunc:
481 printf("\n\t\t packet exceeded snapshot");
482 return 0;
483 }
484
485 void
486 ldp_print(register const u_char *pptr, register u_int len) {
487
488 int processed;
489 while (len > (sizeof(struct ldp_common_header) + sizeof(struct ldp_msg_header))) {
490 processed = ldp_msg_print(pptr);
491 if (processed == 0)
492 return;
493 len -= processed;
494 pptr += processed;
495 }
496 }
497
498
499 int
500 ldp_msg_print(register const u_char *pptr) {
501
502 const struct ldp_common_header *ldp_com_header;
503 const struct ldp_msg_header *ldp_msg_header;
504 const u_char *tptr,*msg_tptr;
505 u_short tlen;
506 u_short pdu_len,msg_len,msg_type,msg_tlen;
507 int hexdump,processed;
508
509 tptr=pptr;
510 ldp_com_header = (const struct ldp_common_header *)pptr;
511 TCHECK(*ldp_com_header);
512
513 /*
514 * Sanity checking of the header.
515 */
516 if (EXTRACT_16BITS(&ldp_com_header->version) != LDP_VERSION) {
517 printf("%sLDP version %u packet not supported",
518 (vflag < 1) ? "" : "\n\t",
519 EXTRACT_16BITS(&ldp_com_header->version));
520 return 0;
521 }
522
523 /* print the LSR-ID, label-space & length */
524 pdu_len = EXTRACT_16BITS(&ldp_com_header->pdu_length);
525 printf("%sLDP, Label-Space-ID: %s:%u, pdu-length: %u",
526 (vflag < 1) ? "" : "\n\t",
527 ipaddr_string(&ldp_com_header->lsr_id),
528 EXTRACT_16BITS(&ldp_com_header->label_space),
529 pdu_len);
530
531 /* bail out if non-verbose */
532 if (vflag < 1)
533 return 0;
534
535 /* ok they seem to want to know everything - lets fully decode it */
536 tlen=pdu_len;
537
538 tptr += sizeof(const struct ldp_common_header);
539 tlen -= sizeof(const struct ldp_common_header)-4; /* Type & Length fields not included */
540
541 while(tlen>0) {
542 /* did we capture enough for fully decoding the msg header ? */
543 if (!TTEST2(*tptr, sizeof(struct ldp_msg_header)))
544 goto trunc;
545
546 ldp_msg_header = (const struct ldp_msg_header *)tptr;
547 msg_len=EXTRACT_16BITS(ldp_msg_header->length);
548 msg_type=LDP_MASK_MSG_TYPE(EXTRACT_16BITS(ldp_msg_header->type));
549
550 /* FIXME vendor private / experimental check */
551 printf("\n\t %s Message (0x%04x), length: %u, Message ID: 0x%08x, Flags: [%s if unknown]",
552 tok2str(ldp_msg_values,
553 "Unknown",
554 msg_type),
555 msg_type,
556 msg_len,
557 EXTRACT_32BITS(&ldp_msg_header->id),
558 LDP_MASK_U_BIT(EXTRACT_16BITS(&ldp_msg_header->type)) ? "continue processing" : "ignore");
559
560 if (msg_len == 0) /* infinite loop protection */
561 return 0;
562
563 msg_tptr=tptr+sizeof(struct ldp_msg_header);
564 msg_tlen=msg_len-sizeof(struct ldp_msg_header)+4; /* Type & Length fields not included */
565
566 /* did we capture enough for fully decoding the message ? */
567 if (!TTEST2(*tptr, msg_len))
568 goto trunc;
569 hexdump=FALSE;
570
571 switch(msg_type) {
572
573 case LDP_MSG_NOTIF:
574 case LDP_MSG_HELLO:
575 case LDP_MSG_INIT:
576 case LDP_MSG_KEEPALIVE:
577 case LDP_MSG_ADDRESS:
578 case LDP_MSG_LABEL_MAPPING:
579 case LDP_MSG_ADDRESS_WITHDRAW:
580 case LDP_MSG_LABEL_WITHDRAW:
581 while(msg_tlen >= 4) {
582 processed = ldp_tlv_print(msg_tptr);
583 if (processed == 0)
584 break;
585 msg_tlen-=processed;
586 msg_tptr+=processed;
587 }
588 break;
589
590 /*
591 * FIXME those are the defined messages that lack a decoder
592 * you are welcome to contribute code ;-)
593 */
594
595 case LDP_MSG_LABEL_REQUEST:
596 case LDP_MSG_LABEL_RELEASE:
597 case LDP_MSG_LABEL_ABORT_REQUEST:
598
599 default:
600 if (vflag <= 1)
601 print_unknown_data(msg_tptr,"\n\t ",msg_tlen);
602 break;
603 }
604 /* do we want to see an additionally hexdump ? */
605 if (vflag > 1 || hexdump==TRUE)
606 print_unknown_data(tptr+sizeof(sizeof(struct ldp_msg_header)),"\n\t ",
607 msg_len);
608
609 tptr += msg_len+4;
610 tlen -= msg_len+4;
611 }
612 return pdu_len+4;
613 trunc:
614 printf("\n\t\t packet exceeded snapshot");
615 return 0;
616 }
617
DragonFly vkernel multiprocessor port