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Expand PMF_FN_* macros.
[netbsd-mini2440.git] / dist / tcpdump / print-ldp.c
blob9fc9cf94ebd39510f9a22a4dcd1ec988af2e83d5
1 /* $NetBSD$ */
2
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 * and Steinar Haug (sthaug@nethelp.no)
17 */
18
19 #include <sys/cdefs.h>
20 #ifndef lint
21 #if 0
22 static const char rcsid[] _U_ =
23 "@(#) Header: /tcpdump/master/tcpdump/print-ldp.c,v 1.8.2.10 2007/02/26 13:31:33 hannes Exp";
24 #else
25 __RCSID("$NetBSD: tcpdump2rcsid.ex,v 1.1 2001/06/25 20:09:58 itojun Exp $");
26 #endif
27 #endif
28
29 #ifdef HAVE_CONFIG_H
30 #include "config.h"
31 #endif
32
33 #include <tcpdump-stdinc.h>
34
35 #include <stdio.h>
36 #include <stdlib.h>
37 #include <string.h>
38
39 #include "interface.h"
40 #include "decode_prefix.h"
41 #include "extract.h"
42 #include "addrtoname.h"
43 #include "af.h"
44
45 #include "l2vpn.h"
46
47 /*
48 * ldp common header
49 *
50 * 0 1 2 3
51 * 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
52 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
53 * | Version | PDU Length |
54 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
55 * | LDP Identifier |
56 * + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
57 * | |
58 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
59 *
60 */
61
62 struct ldp_common_header {
63 u_int8_t version[2];
64 u_int8_t pdu_length[2];
65 u_int8_t lsr_id[4];
66 u_int8_t label_space[2];
67 };
68
69 #define LDP_VERSION 1
70
71 /*
72 * ldp message header
73 *
74 * 0 1 2 3
75 * 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
76 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
77 * |U| Message Type | Message Length |
78 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
79 * | Message ID |
80 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
81 * | |
82 * + +
83 * | Mandatory Parameters |
84 * + +
85 * | |
86 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
87 * | |
88 * + +
89 * | Optional Parameters |
90 * + +
91 * | |
92 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
93 */
94
95 struct ldp_msg_header {
96 u_int8_t type[2];
97 u_int8_t length[2];
98 u_int8_t id[4];
99 };
100
101 #define LDP_MASK_MSG_TYPE(x) ((x)&0x7fff)
102 #define LDP_MASK_U_BIT(x) ((x)&0x8000)
103
104 #define LDP_MSG_NOTIF 0x0001
105 #define LDP_MSG_HELLO 0x0100
106 #define LDP_MSG_INIT 0x0200
107 #define LDP_MSG_KEEPALIVE 0x0201
108 #define LDP_MSG_ADDRESS 0x0300
109 #define LDP_MSG_ADDRESS_WITHDRAW 0x0301
110 #define LDP_MSG_LABEL_MAPPING 0x0400
111 #define LDP_MSG_LABEL_REQUEST 0x0401
112 #define LDP_MSG_LABEL_WITHDRAW 0x0402
113 #define LDP_MSG_LABEL_RELEASE 0x0403
114 #define LDP_MSG_LABEL_ABORT_REQUEST 0x0404
115
116 #define LDP_VENDOR_PRIVATE_MIN 0x3e00
117 #define LDP_VENDOR_PRIVATE_MAX 0x3eff
118 #define LDP_EXPERIMENTAL_MIN 0x3f00
119 #define LDP_EXPERIMENTAL_MAX 0x3fff
120
121 static const struct tok ldp_msg_values[] = {
122 { LDP_MSG_NOTIF, "Notification" },
123 { LDP_MSG_HELLO, "Hello" },
124 { LDP_MSG_INIT, "Initialization" },
125 { LDP_MSG_KEEPALIVE, "Keepalive" },
126 { LDP_MSG_ADDRESS, "Address" },
127 { LDP_MSG_ADDRESS_WITHDRAW, "Address Withdraw" },
128 { LDP_MSG_LABEL_MAPPING, "Label Mapping" },
129 { LDP_MSG_LABEL_REQUEST, "Label Request" },
130 { LDP_MSG_LABEL_WITHDRAW, "Label Withdraw" },
131 { LDP_MSG_LABEL_RELEASE, "Label Release" },
132 { LDP_MSG_LABEL_ABORT_REQUEST, "Label Abort Request" },
133 { 0, NULL}
134 };
135
136 #define LDP_MASK_TLV_TYPE(x) ((x)&0x3fff)
137 #define LDP_MASK_F_BIT(x) ((x)&0x4000)
138
139 #define LDP_TLV_FEC 0x0100
140 #define LDP_TLV_ADDRESS_LIST 0x0101
141 #define LDP_TLV_HOP_COUNT 0x0103
142 #define LDP_TLV_PATH_VECTOR 0x0104
143 #define LDP_TLV_GENERIC_LABEL 0x0200
144 #define LDP_TLV_ATM_LABEL 0x0201
145 #define LDP_TLV_FR_LABEL 0x0202
146 #define LDP_TLV_STATUS 0x0300
147 #define LDP_TLV_EXTD_STATUS 0x0301
148 #define LDP_TLV_RETURNED_PDU 0x0302
149 #define LDP_TLV_RETURNED_MSG 0x0303
150 #define LDP_TLV_COMMON_HELLO 0x0400
151 #define LDP_TLV_IPV4_TRANSPORT_ADDR 0x0401
152 #define LDP_TLV_CONFIG_SEQ_NUMBER 0x0402
153 #define LDP_TLV_IPV6_TRANSPORT_ADDR 0x0403
154 #define LDP_TLV_COMMON_SESSION 0x0500
155 #define LDP_TLV_ATM_SESSION_PARM 0x0501
156 #define LDP_TLV_FR_SESSION_PARM 0x0502
157 #define LDP_TLV_FT_SESSION 0x0503
158 #define LDP_TLV_LABEL_REQUEST_MSG_ID 0x0600
159
160 static const struct tok ldp_tlv_values[] = {
161 { LDP_TLV_FEC, "FEC" },
162 { LDP_TLV_ADDRESS_LIST, "Address List" },
163 { LDP_TLV_HOP_COUNT, "Hop Count" },
164 { LDP_TLV_PATH_VECTOR, "Path Vector" },
165 { LDP_TLV_GENERIC_LABEL, "Generic Label" },
166 { LDP_TLV_ATM_LABEL, "ATM Label" },
167 { LDP_TLV_FR_LABEL, "Frame-Relay Label" },
168 { LDP_TLV_STATUS, "Status" },
169 { LDP_TLV_EXTD_STATUS, "Extended Status" },
170 { LDP_TLV_RETURNED_PDU, "Returned PDU" },
171 { LDP_TLV_RETURNED_MSG, "Returned Message" },
172 { LDP_TLV_COMMON_HELLO, "Common Hello Parameters" },
173 { LDP_TLV_IPV4_TRANSPORT_ADDR, "IPv4 Transport Address" },
174 { LDP_TLV_CONFIG_SEQ_NUMBER, "Configuration Sequence Number" },
175 { LDP_TLV_IPV6_TRANSPORT_ADDR, "IPv6 Transport Address" },
176 { LDP_TLV_COMMON_SESSION, "Common Session Parameters" },
177 { LDP_TLV_ATM_SESSION_PARM, "ATM Session Parameters" },
178 { LDP_TLV_FR_SESSION_PARM, "Frame-Relay Session Parameters" },
179 { LDP_TLV_FT_SESSION, "Fault-Tolerant Session Parameters" },
180 { LDP_TLV_LABEL_REQUEST_MSG_ID, "Label Request Message ID" },
181 { 0, NULL}
182 };
183
184 #define LDP_FEC_WILDCARD 0x01
185 #define LDP_FEC_PREFIX 0x02
186 #define LDP_FEC_HOSTADDRESS 0x03
187 /* From draft-martini-l2circuit-trans-mpls-13.txt */
188 #define LDP_FEC_MARTINI_VC 0x80
189
190 static const struct tok ldp_fec_values[] = {
191 { LDP_FEC_WILDCARD, "Wildcard" },
192 { LDP_FEC_PREFIX, "Prefix" },
193 { LDP_FEC_HOSTADDRESS, "Host address" },
194 { LDP_FEC_MARTINI_VC, "Martini VC" },
195 { 0, NULL}
196 };
197
198 #define LDP_FEC_MARTINI_IFPARM_MTU 0x01
199 #define LDP_FEC_MARTINI_IFPARM_DESC 0x03
200 #define LDP_FEC_MARTINI_IFPARM_VCCV 0x0c
201
202 static const struct tok ldp_fec_martini_ifparm_values[] = {
203 { LDP_FEC_MARTINI_IFPARM_MTU, "MTU" },
204 { LDP_FEC_MARTINI_IFPARM_DESC, "Description" },
205 { LDP_FEC_MARTINI_IFPARM_VCCV, "VCCV" },
206 { 0, NULL}
207 };
208
209 /* draft-ietf-pwe3-vccv-04.txt */
210 static const struct tok ldp_fec_martini_ifparm_vccv_cc_values[] = {
211 { 0x01, "PWE3 control word" },
212 { 0x02, "MPLS Router Alert Label" },
213 { 0x04, "MPLS inner label TTL = 1" },
214 { 0, NULL}
215 };
216
217 /* draft-ietf-pwe3-vccv-04.txt */
218 static const struct tok ldp_fec_martini_ifparm_vccv_cv_values[] = {
219 { 0x01, "ICMP Ping" },
220 { 0x02, "LSP Ping" },
221 { 0x04, "BFD" },
222 { 0, NULL}
223 };
224
225 #define AFNUM_LEN 2
226
227 int ldp_msg_print(register const u_char *);
228 int ldp_tlv_print(register const u_char *);
229
230 /*
231 * ldp tlv header
232 *
233 * 0 1 2 3
234 * 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
235 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
236 * |U|F| Type | Length |
237 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
238 * | |
239 * | Value |
240 * ~ ~
241 * | |
242 * | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
243 * | |
244 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
245 */
246
247 int
248 ldp_tlv_print(register const u_char *tptr) {
249
250 struct ldp_tlv_header {
251 u_int8_t type[2];
252 u_int8_t length[2];
253 };
254
255 const struct ldp_tlv_header *ldp_tlv_header;
256 u_short tlv_type,tlv_len,tlv_tlen,af,ft_flags;
257 u_char fec_type;
258 u_int ui,vc_info_len, vc_info_tlv_type, vc_info_tlv_len,idx;
259 char buf[100];
260 int i;
261
262 ldp_tlv_header = (const struct ldp_tlv_header *)tptr;
263 tlv_len=EXTRACT_16BITS(ldp_tlv_header->length);
264 tlv_tlen=tlv_len;
265 tlv_type=LDP_MASK_TLV_TYPE(EXTRACT_16BITS(ldp_tlv_header->type));
266
267 /* FIXME vendor private / experimental check */
268 printf("\n\t %s TLV (0x%04x), length: %u, Flags: [%s and %s forward if unknown]",
269 tok2str(ldp_tlv_values,
270 "Unknown",
271 tlv_type),
272 tlv_type,
273 tlv_len,
274 LDP_MASK_U_BIT(EXTRACT_16BITS(&ldp_tlv_header->type)) ? "continue processing" : "ignore",
275 LDP_MASK_F_BIT(EXTRACT_16BITS(&ldp_tlv_header->type)) ? "do" : "don't");
276
277 tptr+=sizeof(struct ldp_tlv_header);
278
279 switch(tlv_type) {
280
281 case LDP_TLV_COMMON_HELLO:
282 printf("\n\t Hold Time: %us, Flags: [%s Hello%s]",
283 EXTRACT_16BITS(tptr),
284 (EXTRACT_16BITS(tptr+2)&0x8000) ? "Targeted" : "Link",
285 (EXTRACT_16BITS(tptr+2)&0x4000) ? ", Request for targeted Hellos" : "");
286 break;
287
288 case LDP_TLV_IPV4_TRANSPORT_ADDR:
289 printf("\n\t IPv4 Transport Address: %s", ipaddr_string(tptr));
290 break;
291 #ifdef INET6
292 case LDP_TLV_IPV6_TRANSPORT_ADDR:
293 printf("\n\t IPv6 Transport Address: %s", ip6addr_string(tptr));
294 break;
295 #endif
296 case LDP_TLV_CONFIG_SEQ_NUMBER:
297 printf("\n\t Sequence Number: %u", EXTRACT_32BITS(tptr));
298 break;
299
300 case LDP_TLV_ADDRESS_LIST:
301 af = EXTRACT_16BITS(tptr);
302 tptr+=AFNUM_LEN;
303 tlv_tlen -= AFNUM_LEN;
304 printf("\n\t Address Family: ");
305 if (af == AFNUM_INET) {
306 printf("IPv4, addresses:");
307 while(tlv_tlen >= sizeof(struct in_addr)) {
308 printf(" %s",ipaddr_string(tptr));
309 tlv_tlen-=sizeof(struct in_addr);
310 tptr+=sizeof(struct in_addr);
311 }
312 }
313 #ifdef INET6
314 else if (af == AFNUM_INET6) {
315 printf("IPv6, addresses:");
316 while(tlv_tlen >= sizeof(struct in6_addr)) {
317 printf(" %s",ip6addr_string(tptr));
318 tlv_tlen-=sizeof(struct in6_addr);
319 tptr+=sizeof(struct in6_addr);
320 }
321 }
322 #endif
323 break;
324
325 case LDP_TLV_COMMON_SESSION:
326 printf("\n\t Version: %u, Keepalive: %us, Flags: [Downstream %s, Loop Detection %s]",
327 EXTRACT_16BITS(tptr), EXTRACT_16BITS(tptr+2),
328 (EXTRACT_16BITS(tptr+6)&0x8000) ? "On Demand" : "Unsolicited",
329 (EXTRACT_16BITS(tptr+6)&0x4000) ? "Enabled" : "Disabled"
330 );
331 break;
332
333 case LDP_TLV_FEC:
334 fec_type = *tptr;
335 printf("\n\t %s FEC (0x%02x)",
336 tok2str(ldp_fec_values, "Unknown", fec_type),
337 fec_type);
338
339 tptr+=1;
340 switch(fec_type) {
341
342 case LDP_FEC_WILDCARD:
343 break;
344 case LDP_FEC_PREFIX:
345 af = EXTRACT_16BITS(tptr);
346 tptr+=2;
347 if (af == AFNUM_INET) {
348 i=decode_prefix4(tptr,buf,sizeof(buf));
349 printf(": IPv4 prefix %s",buf);
350 }
351 #ifdef INET6
352 else if (af == AFNUM_INET6) {
353 i=decode_prefix6(tptr,buf,sizeof(buf));
354 printf(": IPv6 prefix %s",buf);
355 }
356 #endif
357 break;
358 case LDP_FEC_HOSTADDRESS:
359 break;
360 case LDP_FEC_MARTINI_VC:
361 if (!TTEST2(*tptr, 11))
362 goto trunc;
363 vc_info_len = *(tptr+2);
364
365 printf(": %s, %scontrol word, group-ID %u, VC-ID %u, VC-info-length: %u",
366 tok2str(l2vpn_encaps_values, "Unknown", EXTRACT_16BITS(tptr)&0x7fff),
367 EXTRACT_16BITS(tptr)&0x8000 ? "" : "no ",
368 EXTRACT_32BITS(tptr+3),
369 EXTRACT_32BITS(tptr+7),
370 vc_info_len);
371
372 if (vc_info_len == 0) /* infinite loop protection */
373 break;
374
375 tptr+=11;
376 if (!TTEST2(*tptr, vc_info_len))
377 goto trunc;
378
379 while (vc_info_len > 2) {
380 vc_info_tlv_type = *tptr;
381 vc_info_tlv_len = *(tptr+1);
382 if (vc_info_tlv_len < 2)
383 break;
384 if (vc_info_len < vc_info_tlv_len)
385 break;
386
387 printf("\n\t\tInterface Parameter: %s (0x%02x), len %u",
388 tok2str(ldp_fec_martini_ifparm_values,"Unknown",vc_info_tlv_type),
389 vc_info_tlv_type,
390 vc_info_tlv_len);
391
392 switch(vc_info_tlv_type) {
393 case LDP_FEC_MARTINI_IFPARM_MTU:
394 printf(": %u",EXTRACT_16BITS(tptr+2));
395 break;
396
397 case LDP_FEC_MARTINI_IFPARM_DESC:
398 printf(": ");
399 for (idx = 2; idx < vc_info_tlv_len; idx++)
400 safeputchar(*(tptr+idx));
401 break;
402
403 case LDP_FEC_MARTINI_IFPARM_VCCV:
404 printf("\n\t\t Control Channels (0x%02x) = [%s]",
405 *(tptr+2),
406 bittok2str(ldp_fec_martini_ifparm_vccv_cc_values,"none",*(tptr+2)));
407 printf("\n\t\t CV Types (0x%02x) = [%s]",
408 *(tptr+3),
409 bittok2str(ldp_fec_martini_ifparm_vccv_cv_values,"none",*(tptr+3)));
410 break;
411
412 default:
413 print_unknown_data(tptr+2,"\n\t\t ",vc_info_tlv_len-2);
414 break;
415 }
416
417 vc_info_len -= vc_info_tlv_len;
418 tptr += vc_info_tlv_len;
419 }
420 break;
421 }
422
423 break;
424
425 case LDP_TLV_GENERIC_LABEL:
426 printf("\n\t Label: %u", EXTRACT_32BITS(tptr) & 0xfffff);
427 break;
428
429 case LDP_TLV_STATUS:
430 ui = EXTRACT_32BITS(tptr);
431 tptr+=4;
432 printf("\n\t Status: 0x%02x, Flags: [%s and %s forward]",
433 ui&0x3fffffff,
434 ui&0x80000000 ? "Fatal error" : "Advisory Notification",
435 ui&0x40000000 ? "do" : "don't");
436 ui = EXTRACT_32BITS(tptr);
437 tptr+=4;
438 if (ui)
439 printf(", causing Message ID: 0x%08x", ui);
440 break;
441
442 case LDP_TLV_FT_SESSION:
443 ft_flags = EXTRACT_16BITS(tptr);
444 printf("\n\t Flags: [%sReconnect, %sSave State, %sAll-Label Protection, %s Checkpoint, %sRe-Learn State]",
445 ft_flags&0x8000 ? "" : "No ",
446 ft_flags&0x8 ? "" : "Don't ",
447 ft_flags&0x4 ? "" : "No ",
448 ft_flags&0x2 ? "Sequence Numbered Label" : "All Labels",
449 ft_flags&0x1 ? "" : "Don't ");
450 tptr+=4;
451 ui = EXTRACT_32BITS(tptr);
452 if (ui)
453 printf(", Reconnect Timeout: %ums", ui);
454 tptr+=4;
455 ui = EXTRACT_32BITS(tptr);
456 if (ui)
457 printf(", Recovery Time: %ums", ui);
458 break;
459
460
461 /*
462 * FIXME those are the defined TLVs that lack a decoder
463 * you are welcome to contribute code ;-)
464 */
465
466 case LDP_TLV_HOP_COUNT:
467 case LDP_TLV_PATH_VECTOR:
468 case LDP_TLV_ATM_LABEL:
469 case LDP_TLV_FR_LABEL:
470 case LDP_TLV_EXTD_STATUS:
471 case LDP_TLV_RETURNED_PDU:
472 case LDP_TLV_RETURNED_MSG:
473 case LDP_TLV_ATM_SESSION_PARM:
474 case LDP_TLV_FR_SESSION_PARM:
475 case LDP_TLV_LABEL_REQUEST_MSG_ID:
476
477 default:
478 if (vflag <= 1)
479 print_unknown_data(tptr,"\n\t ",tlv_tlen);
480 break;
481 }
482 return(tlv_len+4); /* Type & Length fields not included */
483
484 trunc:
485 printf("\n\t\t packet exceeded snapshot");
486 return 0;
487 }
488
489 void
490 ldp_print(register const u_char *pptr, register u_int len) {
491
492 int processed;
493 while (len > (sizeof(struct ldp_common_header) + sizeof(struct ldp_msg_header))) {
494 processed = ldp_msg_print(pptr);
495 if (processed == 0)
496 return;
497 len -= processed;
498 pptr += processed;
499 }
500 }
501
502
503 int
504 ldp_msg_print(register const u_char *pptr) {
505
506 const struct ldp_common_header *ldp_com_header;
507 const struct ldp_msg_header *ldp_msg_header;
508 const u_char *tptr,*msg_tptr;
509 u_short tlen;
510 u_short pdu_len,msg_len,msg_type,msg_tlen;
511 int hexdump,processed;
512
513 tptr=pptr;
514 ldp_com_header = (const struct ldp_common_header *)pptr;
515 TCHECK(*ldp_com_header);
516
517 /*
518 * Sanity checking of the header.
519 */
520 if (EXTRACT_16BITS(&ldp_com_header->version) != LDP_VERSION) {
521 printf("%sLDP version %u packet not supported",
522 (vflag < 1) ? "" : "\n\t",
523 EXTRACT_16BITS(&ldp_com_header->version));
524 return 0;
525 }
526
527 /* print the LSR-ID, label-space & length */
528 pdu_len = EXTRACT_16BITS(&ldp_com_header->pdu_length);
529 printf("%sLDP, Label-Space-ID: %s:%u, pdu-length: %u",
530 (vflag < 1) ? "" : "\n\t",
531 ipaddr_string(&ldp_com_header->lsr_id),
532 EXTRACT_16BITS(&ldp_com_header->label_space),
533 pdu_len);
534
535 /* bail out if non-verbose */
536 if (vflag < 1)
537 return 0;
538
539 /* ok they seem to want to know everything - lets fully decode it */
540 tlen=pdu_len;
541
542 tptr += sizeof(const struct ldp_common_header);
543 tlen -= sizeof(const struct ldp_common_header)-4; /* Type & Length fields not included */
544
545 while(tlen>0) {
546 /* did we capture enough for fully decoding the msg header ? */
547 if (!TTEST2(*tptr, sizeof(struct ldp_msg_header)))
548 goto trunc;
549
550 ldp_msg_header = (const struct ldp_msg_header *)tptr;
551 msg_len=EXTRACT_16BITS(ldp_msg_header->length);
552 msg_type=LDP_MASK_MSG_TYPE(EXTRACT_16BITS(ldp_msg_header->type));
553
554 /* FIXME vendor private / experimental check */
555 printf("\n\t %s Message (0x%04x), length: %u, Message ID: 0x%08x, Flags: [%s if unknown]",
556 tok2str(ldp_msg_values,
557 "Unknown",
558 msg_type),
559 msg_type,
560 msg_len,
561 EXTRACT_32BITS(&ldp_msg_header->id),
562 LDP_MASK_U_BIT(EXTRACT_16BITS(&ldp_msg_header->type)) ? "continue processing" : "ignore");
563
564 if (msg_len == 0) /* infinite loop protection */
565 return 0;
566
567 msg_tptr=tptr+sizeof(struct ldp_msg_header);
568 msg_tlen=msg_len-sizeof(struct ldp_msg_header)+4; /* Type & Length fields not included */
569
570 /* did we capture enough for fully decoding the message ? */
571 if (!TTEST2(*tptr, msg_len))
572 goto trunc;
573 hexdump=FALSE;
574
575 switch(msg_type) {
576
577 case LDP_MSG_NOTIF:
578 case LDP_MSG_HELLO:
579 case LDP_MSG_INIT:
580 case LDP_MSG_KEEPALIVE:
581 case LDP_MSG_ADDRESS:
582 case LDP_MSG_LABEL_MAPPING:
583 case LDP_MSG_ADDRESS_WITHDRAW:
584 case LDP_MSG_LABEL_WITHDRAW:
585 while(msg_tlen >= 4) {
586 processed = ldp_tlv_print(msg_tptr);
587 if (processed == 0)
588 break;
589 msg_tlen-=processed;
590 msg_tptr+=processed;
591 }
592 break;
593
594 /*
595 * FIXME those are the defined messages that lack a decoder
596 * you are welcome to contribute code ;-)
597 */
598
599 case LDP_MSG_LABEL_REQUEST:
600 case LDP_MSG_LABEL_RELEASE:
601 case LDP_MSG_LABEL_ABORT_REQUEST:
602
603 default:
604 if (vflag <= 1)
605 print_unknown_data(msg_tptr,"\n\t ",msg_tlen);
606 break;
607 }
608 /* do we want to see an additionally hexdump ? */
609 if (vflag > 1 || hexdump==TRUE)
610 print_unknown_data(tptr+sizeof(sizeof(struct ldp_msg_header)),"\n\t ",
611 msg_len);
612
613 tptr += msg_len+4;
614 tlen -= msg_len+4;
615 }
616 return pdu_len+4;
617 trunc:
618 printf("\n\t\t packet exceeded snapshot");
619 return 0;
620 }
621
NetBSD on the FriendlyARM MINI2440