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ZeroMQ initial support (ZMTP/1.0 framing)
[tcpdump] / print-dhcp6.c
1 /*
2 * Copyright (C) 1998 and 1999 WIDE Project.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29 /*
30 * RFC3315: DHCPv6
31 * supported DHCPv6 options:
32 * RFC3319: Session Initiation Protocol (SIP) Servers options,
33 * RFC3633: IPv6 Prefix options,
34 * RFC3646: DNS Configuration options,
35 * RFC3898: Network Information Service (NIS) Configuration options,
36 * RFC4075: Simple Network Time Protocol (SNTP) Configuration option,
37 * RFC4242: Information Refresh Time option,
38 * RFC4280: Broadcast and Multicast Control Servers options,
39 * RFC6334: Dual-Stack Lite option,
40 */
41
42 #ifndef lint
43 static const char rcsid[] _U_ =
44 "@(#) $Header: /tcpdump/master/tcpdump/print-dhcp6.c,v 1.37 2008-02-06 10:26:09 guy Exp $";
45 #endif
46
47 #ifdef HAVE_CONFIG_H
48 #include "config.h"
49 #endif
50
51 #include <tcpdump-stdinc.h>
52
53 #include <stdio.h>
54 #include <string.h>
55
56 #include "interface.h"
57 #include "addrtoname.h"
58 #include "extract.h"
59
60 /* lease duration */
61 #define DHCP6_DURATITION_INFINITE 0xffffffff
62
63 /* Error Values */
64 #define DH6ERR_FAILURE 16
65 #define DH6ERR_AUTHFAIL 17
66 #define DH6ERR_POORLYFORMED 18
67 #define DH6ERR_UNAVAIL 19
68 #define DH6ERR_OPTUNAVAIL 20
69
70 /* Message type */
71 #define DH6_SOLICIT 1
72 #define DH6_ADVERTISE 2
73 #define DH6_REQUEST 3
74 #define DH6_CONFIRM 4
75 #define DH6_RENEW 5
76 #define DH6_REBIND 6
77 #define DH6_REPLY 7
78 #define DH6_RELEASE 8
79 #define DH6_DECLINE 9
80 #define DH6_RECONFIGURE 10
81 #define DH6_INFORM_REQ 11
82 #define DH6_RELAY_FORW 12
83 #define DH6_RELAY_REPLY 13
84 #define DH6_LEASEQUERY 14
85 #define DH6_LQ_REPLY 15
86
87 /* DHCP6 base packet format */
88 struct dhcp6 {
89 union {
90 u_int8_t m;
91 u_int32_t x;
92 } dh6_msgtypexid;
93 /* options follow */
94 };
95 #define dh6_msgtype dh6_msgtypexid.m
96 #define dh6_xid dh6_msgtypexid.x
97 #define DH6_XIDMASK 0x00ffffff
98
99 /* DHCPv6 relay messages */
100 struct dhcp6_relay {
101 u_int8_t dh6relay_msgtype;
102 u_int8_t dh6relay_hcnt;
103 u_int8_t dh6relay_linkaddr[16]; /* XXX: badly aligned */
104 u_int8_t dh6relay_peeraddr[16];
105 /* options follow */
106 };
107
108 /* options */
109 #define DH6OPT_CLIENTID 1
110 #define DH6OPT_SERVERID 2
111 #define DH6OPT_IA_NA 3
112 #define DH6OPT_IA_TA 4
113 #define DH6OPT_IA_ADDR 5
114 #define DH6OPT_ORO 6
115 #define DH6OPT_PREFERENCE 7
116 # define DH6OPT_PREF_MAX 255
117 #define DH6OPT_ELAPSED_TIME 8
118 #define DH6OPT_RELAY_MSG 9
119 /*#define DH6OPT_SERVER_MSG 10 deprecated */
120 #define DH6OPT_AUTH 11
121 # define DH6OPT_AUTHPROTO_DELAYED 2
122 # define DH6OPT_AUTHPROTO_RECONFIG 3
123 # define DH6OPT_AUTHALG_HMACMD5 1
124 # define DH6OPT_AUTHRDM_MONOCOUNTER 0
125 # define DH6OPT_AUTHRECONFIG_KEY 1
126 # define DH6OPT_AUTHRECONFIG_HMACMD5 2
127 #define DH6OPT_UNICAST 12
128 #define DH6OPT_STATUS_CODE 13
129 # define DH6OPT_STCODE_SUCCESS 0
130 # define DH6OPT_STCODE_UNSPECFAIL 1
131 # define DH6OPT_STCODE_NOADDRAVAIL 2
132 # define DH6OPT_STCODE_NOBINDING 3
133 # define DH6OPT_STCODE_NOTONLINK 4
134 # define DH6OPT_STCODE_USEMULTICAST 5
135 # define DH6OPT_STCODE_NOPREFIXAVAIL 6
136 # define DH6OPT_STCODE_UNKNOWNQUERYTYPE 7
137 # define DH6OPT_STCODE_MALFORMEDQUERY 8
138 # define DH6OPT_STCODE_NOTCONFIGURED 9
139 # define DH6OPT_STCODE_NOTALLOWED 10
140 #define DH6OPT_RAPID_COMMIT 14
141 #define DH6OPT_USER_CLASS 15
142 #define DH6OPT_VENDOR_CLASS 16
143 #define DH6OPT_VENDOR_OPTS 17
144 #define DH6OPT_INTERFACE_ID 18
145 #define DH6OPT_RECONF_MSG 19
146 #define DH6OPT_RECONF_ACCEPT 20
147 #define DH6OPT_SIP_SERVER_D 21
148 #define DH6OPT_SIP_SERVER_A 22
149 #define DH6OPT_DNS 23
150 #define DH6OPT_DNSNAME 24
151 #define DH6OPT_IA_PD 25
152 #define DH6OPT_IA_PD_PREFIX 26
153 #define DH6OPT_NIS_SERVERS 27
154 #define DH6OPT_NISP_SERVERS 28
155 #define DH6OPT_NIS_NAME 29
156 #define DH6OPT_NISP_NAME 30
157 #define DH6OPT_NTP_SERVERS 31
158 #define DH6OPT_LIFETIME 32
159 #define DH6OPT_BCMCS_SERVER_D 33
160 #define DH6OPT_BCMCS_SERVER_A 34
161 #define DH6OPT_GEOCONF_CIVIC 36
162 #define DH6OPT_REMOTE_ID 37
163 #define DH6OPT_SUBSCRIBER_ID 38
164 #define DH6OPT_CLIENT_FQDN 39
165 #define DH6OPT_PANA_AGENT 40
166 #define DH6OPT_NEW_POSIX_TIMEZONE 41
167 #define DH6OPT_NEW_TZDB_TIMEZONE 42
168 #define DH6OPT_ERO 43
169 #define DH6OPT_LQ_QUERY 44
170 #define DH6OPT_CLIENT_DATA 45
171 #define DH6OPT_CLT_TIME 46
172 #define DH6OPT_LQ_RELAY_DATA 47
173 #define DH6OPT_LQ_CLIENT_LINK 48
174 #define DH6OPT_AFTR_NAME 64
175
176 struct dhcp6opt {
177 u_int16_t dh6opt_type;
178 u_int16_t dh6opt_len;
179 /* type-dependent data follows */
180 };
181
182 static const char *
183 dhcp6opt_name(int type)
184 {
185 static char genstr[sizeof("opt_65535") + 1]; /* XXX thread unsafe */
186
187 if (type > 65535)
188 return "INVALID-option";
189
190 switch(type) {
191 case DH6OPT_CLIENTID:
192 return "client-ID";
193 case DH6OPT_SERVERID:
194 return "server-ID";
195 case DH6OPT_IA_NA:
196 return "IA_NA";
197 case DH6OPT_IA_TA:
198 return "IA_TA";
199 case DH6OPT_IA_ADDR:
200 return "IA_ADDR";
201 case DH6OPT_ORO:
202 return "option-request";
203 case DH6OPT_PREFERENCE:
204 return "preference";
205 case DH6OPT_ELAPSED_TIME:
206 return "elapsed-time";
207 case DH6OPT_RELAY_MSG:
208 return "relay-message";
209 case DH6OPT_AUTH:
210 return "authentication";
211 case DH6OPT_UNICAST:
212 return "server-unicast";
213 case DH6OPT_STATUS_CODE:
214 return "status-code";
215 case DH6OPT_RAPID_COMMIT:
216 return "rapid-commit";
217 case DH6OPT_USER_CLASS:
218 return "user-class";
219 case DH6OPT_VENDOR_CLASS:
220 return "vendor-class";
221 case DH6OPT_VENDOR_OPTS:
222 return "vendor-specific-info";
223 case DH6OPT_INTERFACE_ID:
224 return "interface-ID";
225 case DH6OPT_RECONF_MSG:
226 return "reconfigure-message";
227 case DH6OPT_RECONF_ACCEPT:
228 return "reconfigure-accept";
229 case DH6OPT_SIP_SERVER_D:
230 return "SIP-servers-domain";
231 case DH6OPT_SIP_SERVER_A:
232 return "SIP-servers-address";
233 case DH6OPT_DNS:
234 return "DNS-server";
235 case DH6OPT_DNSNAME:
236 return "DNS-search-list";
237 case DH6OPT_IA_PD:
238 return "IA_PD";
239 case DH6OPT_IA_PD_PREFIX:
240 return "IA_PD-prefix";
241 case DH6OPT_NTP_SERVERS:
242 return "NTP-server";
243 case DH6OPT_LIFETIME:
244 return "lifetime";
245 case DH6OPT_NIS_SERVERS:
246 return "NIS-server";
247 case DH6OPT_NISP_SERVERS:
248 return "NIS+-server";
249 case DH6OPT_NIS_NAME:
250 return "NIS-domain-name";
251 case DH6OPT_NISP_NAME:
252 return "NIS+-domain-name";
253 case DH6OPT_BCMCS_SERVER_D:
254 return "BCMCS-domain-name";
255 case DH6OPT_BCMCS_SERVER_A:
256 return "BCMCS-server";
257 case DH6OPT_GEOCONF_CIVIC:
258 return "Geoconf-Civic";
259 case DH6OPT_REMOTE_ID:
260 return "Remote-ID";
261 case DH6OPT_SUBSCRIBER_ID:
262 return "Subscriber-ID";
263 case DH6OPT_CLIENT_FQDN:
264 return "Client-FQDN";
265 case DH6OPT_PANA_AGENT:
266 return "PANA-agent";
267 case DH6OPT_NEW_POSIX_TIMEZONE:
268 return "POSIX-timezone";
269 case DH6OPT_NEW_TZDB_TIMEZONE:
270 return "POSIX-tz-database";
271 case DH6OPT_ERO:
272 return "Echo-request-option";
273 case DH6OPT_LQ_QUERY:
274 return "Lease-query";
275 case DH6OPT_CLIENT_DATA:
276 return "LQ-client-data";
277 case DH6OPT_CLT_TIME:
278 return "Clt-time";
279 case DH6OPT_LQ_RELAY_DATA:
280 return "LQ-relay-data";
281 case DH6OPT_LQ_CLIENT_LINK:
282 return "LQ-client-link";
283 case DH6OPT_AFTR_NAME:
284 return "AFTR-Name";
285 default:
286 snprintf(genstr, sizeof(genstr), "opt_%d", type);
287 return(genstr);
288 }
289 }
290
291 static const char *
292 dhcp6stcode(int code)
293 {
294 static char genstr[sizeof("code255") + 1]; /* XXX thread unsafe */
295
296 if (code > 255)
297 return "INVALID code";
298
299 switch(code) {
300 case DH6OPT_STCODE_SUCCESS:
301 return "success";
302 case DH6OPT_STCODE_UNSPECFAIL:
303 return "unspec failure";
304 case DH6OPT_STCODE_NOADDRAVAIL:
305 return "no addresses";
306 case DH6OPT_STCODE_NOBINDING:
307 return "no binding";
308 case DH6OPT_STCODE_NOTONLINK:
309 return "not on-link";
310 case DH6OPT_STCODE_USEMULTICAST:
311 return "use multicast";
312 case DH6OPT_STCODE_NOPREFIXAVAIL:
313 return "no prefixes";
314 case DH6OPT_STCODE_UNKNOWNQUERYTYPE:
315 return "unknown query type";
316 case DH6OPT_STCODE_MALFORMEDQUERY:
317 return "malformed query";
318 case DH6OPT_STCODE_NOTCONFIGURED:
319 return "not configured";
320 case DH6OPT_STCODE_NOTALLOWED:
321 return "not allowed";
322 default:
323 snprintf(genstr, sizeof(genstr), "code%d", code);
324 return(genstr);
325 }
326 }
327
328 static void
329 dhcp6opt_print(const u_char *cp, const u_char *ep)
330 {
331 struct dhcp6opt *dh6o;
332 u_char *tp;
333 size_t i;
334 u_int16_t opttype;
335 size_t optlen;
336 u_int8_t auth_proto;
337 u_int authinfolen, authrealmlen;
338
339 if (cp == ep)
340 return;
341 while (cp < ep) {
342 if (ep < cp + sizeof(*dh6o))
343 goto trunc;
344 dh6o = (struct dhcp6opt *)cp;
345 TCHECK(*dh6o);
346 optlen = EXTRACT_16BITS(&dh6o->dh6opt_len);
347 if (ep < cp + sizeof(*dh6o) + optlen)
348 goto trunc;
349 opttype = EXTRACT_16BITS(&dh6o->dh6opt_type);
350 printf(" (%s", dhcp6opt_name(opttype));
351 switch (opttype) {
352 case DH6OPT_CLIENTID:
353 case DH6OPT_SERVERID:
354 if (optlen < 2) {
355 /*(*/
356 printf(" ?)");
357 break;
358 }
359 tp = (u_char *)(dh6o + 1);
360 switch (EXTRACT_16BITS(tp)) {
361 case 1:
362 if (optlen >= 2 + 6) {
363 printf(" hwaddr/time type %u time %u ",
364 EXTRACT_16BITS(&tp[2]),
365 EXTRACT_32BITS(&tp[4]));
366 for (i = 8; i < optlen; i++)
367 printf("%02x", tp[i]);
368 /*(*/
369 printf(")");
370 } else {
371 /*(*/
372 printf(" ?)");
373 }
374 break;
375 case 2:
376 if (optlen >= 2 + 8) {
377 printf(" vid ");
378 for (i = 2; i < 2 + 8; i++)
379 printf("%02x", tp[i]);
380 /*(*/
381 printf(")");
382 } else {
383 /*(*/
384 printf(" ?)");
385 }
386 break;
387 case 3:
388 if (optlen >= 2 + 2) {
389 printf(" hwaddr type %u ",
390 EXTRACT_16BITS(&tp[2]));
391 for (i = 4; i < optlen; i++)
392 printf("%02x", tp[i]);
393 /*(*/
394 printf(")");
395 } else {
396 /*(*/
397 printf(" ?)");
398 }
399 break;
400 default:
401 printf(" type %d)", EXTRACT_16BITS(tp));
402 break;
403 }
404 break;
405 case DH6OPT_IA_ADDR:
406 if (optlen < 24) {
407 /*(*/
408 printf(" ?)");
409 break;
410 }
411 tp = (u_char *)(dh6o + 1);
412 printf(" %s", ip6addr_string(&tp[0]));
413 printf(" pltime:%u vltime:%u",
414 EXTRACT_32BITS(&tp[16]),
415 EXTRACT_32BITS(&tp[20]));
416 if (optlen > 24) {
417 /* there are sub-options */
418 dhcp6opt_print(tp + 24, tp + optlen);
419 }
420 printf(")");
421 break;
422 case DH6OPT_ORO:
423 case DH6OPT_ERO:
424 if (optlen % 2) {
425 printf(" ?)");
426 break;
427 }
428 tp = (u_char *)(dh6o + 1);
429 for (i = 0; i < optlen; i += 2) {
430 printf(" %s",
431 dhcp6opt_name(EXTRACT_16BITS(&tp[i])));
432 }
433 printf(")");
434 break;
435 case DH6OPT_PREFERENCE:
436 if (optlen != 1) {
437 printf(" ?)");
438 break;
439 }
440 tp = (u_char *)(dh6o + 1);
441 printf(" %d)", *tp);
442 break;
443 case DH6OPT_ELAPSED_TIME:
444 if (optlen != 2) {
445 printf(" ?)");
446 break;
447 }
448 tp = (u_char *)(dh6o + 1);
449 printf(" %d)", EXTRACT_16BITS(tp));
450 break;
451 case DH6OPT_RELAY_MSG:
452 printf(" (");
453 tp = (u_char *)(dh6o + 1);
454 dhcp6_print(tp, optlen);
455 printf(")");
456 break;
457 case DH6OPT_AUTH:
458 if (optlen < 11) {
459 printf(" ?)");
460 break;
461 }
462 tp = (u_char *)(dh6o + 1);
463 auth_proto = *tp;
464 switch (auth_proto) {
465 case DH6OPT_AUTHPROTO_DELAYED:
466 printf(" proto: delayed");
467 break;
468 case DH6OPT_AUTHPROTO_RECONFIG:
469 printf(" proto: reconfigure");
470 break;
471 default:
472 printf(" proto: %d", auth_proto);
473 break;
474 }
475 tp++;
476 switch (*tp) {
477 case DH6OPT_AUTHALG_HMACMD5:
478 /* XXX: may depend on the protocol */
479 printf(", alg: HMAC-MD5");
480 break;
481 default:
482 printf(", alg: %d", *tp);
483 break;
484 }
485 tp++;
486 switch (*tp) {
487 case DH6OPT_AUTHRDM_MONOCOUNTER:
488 printf(", RDM: mono");
489 break;
490 default:
491 printf(", RDM: %d", *tp);
492 break;
493 }
494 tp++;
495 printf(", RD:");
496 for (i = 0; i < 4; i++, tp += 2)
497 printf(" %04x", EXTRACT_16BITS(tp));
498
499 /* protocol dependent part */
500 authinfolen = optlen - 11;
501 switch (auth_proto) {
502 case DH6OPT_AUTHPROTO_DELAYED:
503 if (authinfolen == 0)
504 break;
505 if (authinfolen < 20) {
506 printf(" ??");
507 break;
508 }
509 authrealmlen = authinfolen - 20;
510 if (authrealmlen > 0) {
511 printf(", realm: ");
512 }
513 for (i = 0; i < authrealmlen; i++, tp++)
514 printf("%02x", *tp);
515 printf(", key ID: %08x", EXTRACT_32BITS(tp));
516 tp += 4;
517 printf(", HMAC-MD5:");
518 for (i = 0; i < 4; i++, tp+= 4)
519 printf(" %08x", EXTRACT_32BITS(tp));
520 break;
521 case DH6OPT_AUTHPROTO_RECONFIG:
522 if (authinfolen != 17) {
523 printf(" ??");
524 break;
525 }
526 switch (*tp++) {
527 case DH6OPT_AUTHRECONFIG_KEY:
528 printf(" reconfig-key");
529 break;
530 case DH6OPT_AUTHRECONFIG_HMACMD5:
531 printf(" type: HMAC-MD5");
532 break;
533 default:
534 printf(" type: ??");
535 break;
536 }
537 printf(" value:");
538 for (i = 0; i < 4; i++, tp+= 4)
539 printf(" %08x", EXTRACT_32BITS(tp));
540 break;
541 default:
542 printf(" ??");
543 break;
544 }
545
546 printf(")");
547 break;
548 case DH6OPT_RAPID_COMMIT: /* nothing todo */
549 printf(")");
550 break;
551 case DH6OPT_INTERFACE_ID:
552 case DH6OPT_SUBSCRIBER_ID:
553 /*
554 * Since we cannot predict the encoding, print hex dump
555 * at most 10 characters.
556 */
557 tp = (u_char *)(dh6o + 1);
558 printf(" ");
559 for (i = 0; i < optlen && i < 10; i++)
560 printf("%02x", tp[i]);
561 printf("...)");
562 break;
563 case DH6OPT_RECONF_MSG:
564 tp = (u_char *)(dh6o + 1);
565 switch (*tp) {
566 case DH6_RENEW:
567 printf(" for renew)");
568 break;
569 case DH6_INFORM_REQ:
570 printf(" for inf-req)");
571 break;
572 default:
573 printf(" for ?\?\?(%02x))", *tp);
574 break;
575 }
576 break;
577 case DH6OPT_RECONF_ACCEPT: /* nothing todo */
578 printf(")");
579 break;
580 case DH6OPT_SIP_SERVER_A:
581 case DH6OPT_DNS:
582 case DH6OPT_NTP_SERVERS:
583 case DH6OPT_NIS_SERVERS:
584 case DH6OPT_NISP_SERVERS:
585 case DH6OPT_BCMCS_SERVER_A:
586 case DH6OPT_PANA_AGENT:
587 case DH6OPT_LQ_CLIENT_LINK:
588 if (optlen % 16) {
589 printf(" ?)");
590 break;
591 }
592 tp = (u_char *)(dh6o + 1);
593 for (i = 0; i < optlen; i += 16)
594 printf(" %s", ip6addr_string(&tp[i]));
595 printf(")");
596 break;
597 case DH6OPT_STATUS_CODE:
598 if (optlen < 2) {
599 printf(" ?)");
600 break;
601 }
602 tp = (u_char *)(dh6o + 1);
603 printf(" %s)", dhcp6stcode(EXTRACT_16BITS(&tp[0])));
604 break;
605 case DH6OPT_IA_NA:
606 case DH6OPT_IA_PD:
607 if (optlen < 12) {
608 printf(" ?)");
609 break;
610 }
611 tp = (u_char *)(dh6o + 1);
612 printf(" IAID:%u T1:%u T2:%u",
613 EXTRACT_32BITS(&tp[0]),
614 EXTRACT_32BITS(&tp[4]),
615 EXTRACT_32BITS(&tp[8]));
616 if (optlen > 12) {
617 /* there are sub-options */
618 dhcp6opt_print(tp + 12, tp + optlen);
619 }
620 printf(")");
621 break;
622 case DH6OPT_IA_TA:
623 if (optlen < 4) {
624 printf(" ?)");
625 break;
626 }
627 tp = (u_char *)(dh6o + 1);
628 printf(" IAID:%u", EXTRACT_32BITS(tp));
629 if (optlen > 4) {
630 /* there are sub-options */
631 dhcp6opt_print(tp + 4, tp + optlen);
632 }
633 printf(")");
634 break;
635 case DH6OPT_IA_PD_PREFIX:
636 if (optlen < 25) {
637 printf(" ?)");
638 break;
639 }
640 tp = (u_char *)(dh6o + 1);
641 printf(" %s/%d", ip6addr_string(&tp[9]), tp[8]);
642 printf(" pltime:%u vltime:%u",
643 EXTRACT_32BITS(&tp[0]),
644 EXTRACT_32BITS(&tp[4]));
645 if (optlen > 25) {
646 /* there are sub-options */
647 dhcp6opt_print(tp + 25, tp + optlen);
648 }
649 printf(")");
650 break;
651 case DH6OPT_LIFETIME:
652 case DH6OPT_CLT_TIME:
653 if (optlen != 4) {
654 printf(" ?)");
655 break;
656 }
657 tp = (u_char *)(dh6o + 1);
658 printf(" %d)", EXTRACT_32BITS(tp));
659 break;
660 case DH6OPT_REMOTE_ID:
661 if (optlen < 4) {
662 printf(" ?)");
663 break;
664 }
665 tp = (u_char *)(dh6o + 1);
666 printf(" %d ", EXTRACT_32BITS(tp));
667 /*
668 * Print hex dump first 10 characters.
669 */
670 for (i = 4; i < optlen && i < 14; i++)
671 printf("%02x", tp[i]);
672 printf("...)");
673 break;
674 case DH6OPT_LQ_QUERY:
675 if (optlen < 17) {
676 printf(" ?)");
677 break;
678 }
679 tp = (u_char *)(dh6o + 1);
680 switch (*tp) {
681 case 1:
682 printf(" by-address");
683 break;
684 case 2:
685 printf(" by-clientID");
686 break;
687 default:
688 printf(" type_%d", (int)*tp);
689 break;
690 }
691 printf(" %s", ip6addr_string(&tp[1]));
692 if (optlen > 17) {
693 /* there are query-options */
694 dhcp6opt_print(tp + 17, tp + optlen);
695 }
696 printf(")");
697 break;
698 case DH6OPT_CLIENT_DATA:
699 tp = (u_char *)(dh6o + 1);
700 if (optlen > 0) {
701 /* there are encapsulated options */
702 dhcp6opt_print(tp, tp + optlen);
703 }
704 printf(")");
705 break;
706 case DH6OPT_LQ_RELAY_DATA:
707 if (optlen < 16) {
708 printf(" ?)");
709 break;
710 }
711 tp = (u_char *)(dh6o + 1);
712 printf(" %s ", ip6addr_string(&tp[0]));
713 /*
714 * Print hex dump first 10 characters.
715 */
716 for (i = 16; i < optlen && i < 26; i++)
717 printf("%02x", tp[i]);
718 printf("...)");
719 break;
720 case DH6OPT_AFTR_NAME:
721 if (optlen < 3) {
722 printf(" ?)");
723 break;
724 }
725 tp = (u_char *)(dh6o + 1);
726 int remain_len = optlen;
727 printf(" ");
728 /* Encoding is described in section 3.1 of RFC 1035 */
729 int label_len; /* Label length */
730 while (remain_len && *tp) {
731 label_len = *tp++;
732 if (label_len < remain_len - 1) {
733 printf("%.*s", label_len, tp);
734 tp += label_len;
735 remain_len -= (label_len + 1);
736 if(*tp) printf(".");
737 } else {
738 printf(" ?");
739 break;
740 }
741 }
742 printf(")");
743 break;
744 default:
745 printf(")");
746 break;
747 }
748
749 cp += sizeof(*dh6o) + optlen;
750 }
751 return;
752
753 trunc:
754 printf("[|dhcp6ext]");
755 }
756
757 /*
758 * Print dhcp6 packets
759 */
760 void
761 dhcp6_print(const u_char *cp, u_int length)
762 {
763 struct dhcp6 *dh6;
764 struct dhcp6_relay *dh6relay;
765 const u_char *ep;
766 u_char *extp;
767 const char *name;
768
769 printf("dhcp6");
770
771 ep = (u_char *)snapend;
772 if (cp + length < ep)
773 ep = cp + length;
774
775 dh6 = (struct dhcp6 *)cp;
776 dh6relay = (struct dhcp6_relay *)cp;
777 TCHECK(dh6->dh6_xid);
778 switch (dh6->dh6_msgtype) {
779 case DH6_SOLICIT:
780 name = "solicit";
781 break;
782 case DH6_ADVERTISE:
783 name = "advertise";
784 break;
785 case DH6_REQUEST:
786 name = "request";
787 break;
788 case DH6_CONFIRM:
789 name = "confirm";
790 break;
791 case DH6_RENEW:
792 name = "renew";
793 break;
794 case DH6_REBIND:
795 name = "rebind";
796 break;
797 case DH6_REPLY:
798 name = "reply";
799 break;
800 case DH6_RELEASE:
801 name = "release";
802 break;
803 case DH6_DECLINE:
804 name = "decline";
805 break;
806 case DH6_RECONFIGURE:
807 name = "reconfigure";
808 break;
809 case DH6_INFORM_REQ:
810 name= "inf-req";
811 break;
812 case DH6_RELAY_FORW:
813 name= "relay-fwd";
814 break;
815 case DH6_RELAY_REPLY:
816 name= "relay-reply";
817 break;
818 case DH6_LEASEQUERY:
819 name= "leasequery";
820 break;
821 case DH6_LQ_REPLY:
822 name= "leasequery-reply";
823 break;
824 default:
825 name = NULL;
826 break;
827 }
828
829 if (!vflag) {
830 if (name)
831 printf(" %s", name);
832 else if (dh6->dh6_msgtype != DH6_RELAY_FORW &&
833 dh6->dh6_msgtype != DH6_RELAY_REPLY) {
834 printf(" msgtype-%u", dh6->dh6_msgtype);
835 }
836 return;
837 }
838
839 /* XXX relay agent messages have to be handled differently */
840
841 if (name)
842 printf(" %s (", name); /*)*/
843 else
844 printf(" msgtype-%u (", dh6->dh6_msgtype); /*)*/
845 if (dh6->dh6_msgtype != DH6_RELAY_FORW &&
846 dh6->dh6_msgtype != DH6_RELAY_REPLY) {
847 printf("xid=%x", EXTRACT_32BITS(&dh6->dh6_xid) & DH6_XIDMASK);
848 extp = (u_char *)(dh6 + 1);
849 dhcp6opt_print(extp, ep);
850 } else { /* relay messages */
851 struct in6_addr addr6;
852
853 TCHECK(dh6relay->dh6relay_peeraddr);
854
855 memcpy(&addr6, dh6relay->dh6relay_linkaddr, sizeof (addr6));
856 printf("linkaddr=%s", ip6addr_string(&addr6));
857
858 memcpy(&addr6, dh6relay->dh6relay_peeraddr, sizeof (addr6));
859 printf(" peeraddr=%s", ip6addr_string(&addr6));
860
861 dhcp6opt_print((u_char *)(dh6relay + 1), ep);
862 }
863 /*(*/
864 printf(")");
865 return;
866
867 trunc:
868 printf("[|dhcp6]");
869 }
[mirror] the TCPdump network dissector