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kmalloc: Avoid code duplication.
[dragonfly.git] / contrib / tcpdump / print-dhcp6.c
bloba75da823815a48c3881af079272da615c699eed3
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,
33 * RFC3633,
34 * RFC3646,
35 * RFC3898,
36 * RFC4075,
37 * RFC4242,
38 * RFC4280,
39 */
40
41 #ifndef lint
42 static const char rcsid[] _U_ =
43 "@(#) $Header: /tcpdump/master/tcpdump/print-dhcp6.c,v 1.37 2008-02-06 10:26:09 guy Exp $";
44 #endif
45
46 #ifdef HAVE_CONFIG_H
47 #include "config.h"
48 #endif
49
50 #include <tcpdump-stdinc.h>
51
52 #include <stdio.h>
53 #include <string.h>
54
55 #include "interface.h"
56 #include "addrtoname.h"
57 #include "extract.h"
58
59 /* lease duration */
60 #define DHCP6_DURATITION_INFINITE 0xffffffff
61
62 /* Error Values */
63 #define DH6ERR_FAILURE 16
64 #define DH6ERR_AUTHFAIL 17
65 #define DH6ERR_POORLYFORMED 18
66 #define DH6ERR_UNAVAIL 19
67 #define DH6ERR_OPTUNAVAIL 20
68
69 /* Message type */
70 #define DH6_SOLICIT 1
71 #define DH6_ADVERTISE 2
72 #define DH6_REQUEST 3
73 #define DH6_CONFIRM 4
74 #define DH6_RENEW 5
75 #define DH6_REBIND 6
76 #define DH6_REPLY 7
77 #define DH6_RELEASE 8
78 #define DH6_DECLINE 9
79 #define DH6_RECONFIGURE 10
80 #define DH6_INFORM_REQ 11
81 #define DH6_RELAY_FORW 12
82 #define DH6_RELAY_REPLY 13
83 #define DH6_LEASEQUERY 14
84 #define DH6_LQ_REPLY 15
85
86 /* DHCP6 base packet format */
87 struct dhcp6 {
88 union {
89 u_int8_t m;
90 u_int32_t x;
91 } dh6_msgtypexid;
92 /* options follow */
93 };
94 #define dh6_msgtype dh6_msgtypexid.m
95 #define dh6_xid dh6_msgtypexid.x
96 #define DH6_XIDMASK 0x00ffffff
97
98 /* DHCPv6 relay messages */
99 struct dhcp6_relay {
100 u_int8_t dh6relay_msgtype;
101 u_int8_t dh6relay_hcnt;
102 u_int8_t dh6relay_linkaddr[16]; /* XXX: badly aligned */
103 u_int8_t dh6relay_peeraddr[16];
104 /* options follow */
105 };
106
107 /* options */
108 #define DH6OPT_CLIENTID 1
109 #define DH6OPT_SERVERID 2
110 #define DH6OPT_IA_NA 3
111 #define DH6OPT_IA_TA 4
112 #define DH6OPT_IA_ADDR 5
113 #define DH6OPT_ORO 6
114 #define DH6OPT_PREFERENCE 7
115 # define DH6OPT_PREF_MAX 255
116 #define DH6OPT_ELAPSED_TIME 8
117 #define DH6OPT_RELAY_MSG 9
118 /*#define DH6OPT_SERVER_MSG 10 deprecated */
119 #define DH6OPT_AUTH 11
120 # define DH6OPT_AUTHPROTO_DELAYED 2
121 # define DH6OPT_AUTHPROTO_RECONFIG 3
122 # define DH6OPT_AUTHALG_HMACMD5 1
123 # define DH6OPT_AUTHRDM_MONOCOUNTER 0
124 # define DH6OPT_AUTHRECONFIG_KEY 1
125 # define DH6OPT_AUTHRECONFIG_HMACMD5 2
126 #define DH6OPT_UNICAST 12
127 #define DH6OPT_STATUS_CODE 13
128 # define DH6OPT_STCODE_SUCCESS 0
129 # define DH6OPT_STCODE_UNSPECFAIL 1
130 # define DH6OPT_STCODE_NOADDRAVAIL 2
131 # define DH6OPT_STCODE_NOBINDING 3
132 # define DH6OPT_STCODE_NOTONLINK 4
133 # define DH6OPT_STCODE_USEMULTICAST 5
134 # define DH6OPT_STCODE_NOPREFIXAVAIL 6
135 # define DH6OPT_STCODE_UNKNOWNQUERYTYPE 7
136 # define DH6OPT_STCODE_MALFORMEDQUERY 8
137 # define DH6OPT_STCODE_NOTCONFIGURED 9
138 # define DH6OPT_STCODE_NOTALLOWED 10
139 #define DH6OPT_RAPID_COMMIT 14
140 #define DH6OPT_USER_CLASS 15
141 #define DH6OPT_VENDOR_CLASS 16
142 #define DH6OPT_VENDOR_OPTS 17
143 #define DH6OPT_INTERFACE_ID 18
144 #define DH6OPT_RECONF_MSG 19
145 #define DH6OPT_RECONF_ACCEPT 20
146 #define DH6OPT_SIP_SERVER_D 21
147 #define DH6OPT_SIP_SERVER_A 22
148 #define DH6OPT_DNS 23
149 #define DH6OPT_DNSNAME 24
150 #define DH6OPT_IA_PD 25
151 #define DH6OPT_IA_PD_PREFIX 26
152 #define DH6OPT_NIS_SERVERS 27
153 #define DH6OPT_NISP_SERVERS 28
154 #define DH6OPT_NIS_NAME 29
155 #define DH6OPT_NISP_NAME 30
156 #define DH6OPT_NTP_SERVERS 31
157 #define DH6OPT_LIFETIME 32
158 #define DH6OPT_BCMCS_SERVER_D 33
159 #define DH6OPT_BCMCS_SERVER_A 34
160 #define DH6OPT_GEOCONF_CIVIC 36
161 #define DH6OPT_REMOTE_ID 37
162 #define DH6OPT_SUBSCRIBER_ID 38
163 #define DH6OPT_CLIENT_FQDN 39
164 #define DH6OPT_PANA_AGENT 40
165 #define DH6OPT_NEW_POSIX_TIMEZONE 41
166 #define DH6OPT_NEW_TZDB_TIMEZONE 42
167 #define DH6OPT_ERO 43
168 #define DH6OPT_LQ_QUERY 44
169 #define DH6OPT_CLIENT_DATA 45
170 #define DH6OPT_CLT_TIME 46
171 #define DH6OPT_LQ_RELAY_DATA 47
172 #define DH6OPT_LQ_CLIENT_LINK 48
173
174 struct dhcp6opt {
175 u_int16_t dh6opt_type;
176 u_int16_t dh6opt_len;
177 /* type-dependent data follows */
178 };
179
180 static const char *
181 dhcp6opt_name(int type)
182 {
183 static char genstr[sizeof("opt_65535") + 1]; /* XXX thread unsafe */
184
185 if (type > 65535)
186 return "INVALID-option";
187
188 switch(type) {
189 case DH6OPT_CLIENTID:
190 return "client-ID";
191 case DH6OPT_SERVERID:
192 return "server-ID";
193 case DH6OPT_IA_NA:
194 return "IA_NA";
195 case DH6OPT_IA_TA:
196 return "IA_TA";
197 case DH6OPT_IA_ADDR:
198 return "IA_ADDR";
199 case DH6OPT_ORO:
200 return "option-request";
201 case DH6OPT_PREFERENCE:
202 return "preference";
203 case DH6OPT_ELAPSED_TIME:
204 return "elapsed-time";
205 case DH6OPT_RELAY_MSG:
206 return "relay-message";
207 case DH6OPT_AUTH:
208 return "authentication";
209 case DH6OPT_UNICAST:
210 return "server-unicast";
211 case DH6OPT_STATUS_CODE:
212 return "status-code";
213 case DH6OPT_RAPID_COMMIT:
214 return "rapid-commit";
215 case DH6OPT_USER_CLASS:
216 return "user-class";
217 case DH6OPT_VENDOR_CLASS:
218 return "vendor-class";
219 case DH6OPT_VENDOR_OPTS:
220 return "vendor-specific-info";
221 case DH6OPT_INTERFACE_ID:
222 return "interface-ID";
223 case DH6OPT_RECONF_MSG:
224 return "reconfigure-message";
225 case DH6OPT_RECONF_ACCEPT:
226 return "reconfigure-accept";
227 case DH6OPT_SIP_SERVER_D:
228 return "SIP-servers-domain";
229 case DH6OPT_SIP_SERVER_A:
230 return "SIP-servers-address";
231 case DH6OPT_DNS:
232 return "DNS-server";
233 case DH6OPT_DNSNAME:
234 return "DNS-search-list";
235 case DH6OPT_IA_PD:
236 return "IA_PD";
237 case DH6OPT_IA_PD_PREFIX:
238 return "IA_PD-prefix";
239 case DH6OPT_NTP_SERVERS:
240 return "NTP-server";
241 case DH6OPT_LIFETIME:
242 return "lifetime";
243 case DH6OPT_NIS_SERVERS:
244 return "NIS-server";
245 case DH6OPT_NISP_SERVERS:
246 return "NIS+-server";
247 case DH6OPT_NIS_NAME:
248 return "NIS-domain-name";
249 case DH6OPT_NISP_NAME:
250 return "NIS+-domain-name";
251 case DH6OPT_BCMCS_SERVER_D:
252 return "BCMCS-domain-name";
253 case DH6OPT_BCMCS_SERVER_A:
254 return "BCMCS-server";
255 case DH6OPT_GEOCONF_CIVIC:
256 return "Geoconf-Civic";
257 case DH6OPT_REMOTE_ID:
258 return "Remote-ID";
259 case DH6OPT_SUBSCRIBER_ID:
260 return "Subscriber-ID";
261 case DH6OPT_CLIENT_FQDN:
262 return "Client-FQDN";
263 case DH6OPT_PANA_AGENT:
264 return "PANA-agent";
265 case DH6OPT_NEW_POSIX_TIMEZONE:
266 return "POSIX-timezone";
267 case DH6OPT_NEW_TZDB_TIMEZONE:
268 return "POSIX-tz-database";
269 case DH6OPT_ERO:
270 return "Echo-request-option";
271 case DH6OPT_LQ_QUERY:
272 return "Lease-query";
273 case DH6OPT_CLIENT_DATA:
274 return "LQ-client-data";
275 case DH6OPT_CLT_TIME:
276 return "Clt-time";
277 case DH6OPT_LQ_RELAY_DATA:
278 return "LQ-relay-data";
279 case DH6OPT_LQ_CLIENT_LINK:
280 return "LQ-client-link";
281 default:
282 snprintf(genstr, sizeof(genstr), "opt_%d", type);
283 return(genstr);
284 }
285 }
286
287 static const char *
288 dhcp6stcode(int code)
289 {
290 static char genstr[sizeof("code255") + 1]; /* XXX thread unsafe */
291
292 if (code > 255)
293 return "INVALID code";
294
295 switch(code) {
296 case DH6OPT_STCODE_SUCCESS:
297 return "success";
298 case DH6OPT_STCODE_UNSPECFAIL:
299 return "unspec failure";
300 case DH6OPT_STCODE_NOADDRAVAIL:
301 return "no addresses";
302 case DH6OPT_STCODE_NOBINDING:
303 return "no binding";
304 case DH6OPT_STCODE_NOTONLINK:
305 return "not on-link";
306 case DH6OPT_STCODE_USEMULTICAST:
307 return "use multicast";
308 case DH6OPT_STCODE_NOPREFIXAVAIL:
309 return "no prefixes";
310 case DH6OPT_STCODE_UNKNOWNQUERYTYPE:
311 return "unknown query type";
312 case DH6OPT_STCODE_MALFORMEDQUERY:
313 return "malformed query";
314 case DH6OPT_STCODE_NOTCONFIGURED:
315 return "not configured";
316 case DH6OPT_STCODE_NOTALLOWED:
317 return "not allowed";
318 default:
319 snprintf(genstr, sizeof(genstr), "code%d", code);
320 return(genstr);
321 }
322 }
323
324 static void
325 dhcp6opt_print(const u_char *cp, const u_char *ep)
326 {
327 struct dhcp6opt *dh6o;
328 u_char *tp;
329 size_t i;
330 u_int16_t opttype;
331 size_t optlen;
332 u_int8_t auth_proto;
333 u_int authinfolen, authrealmlen;
334
335 if (cp == ep)
336 return;
337 while (cp < ep) {
338 if (ep < cp + sizeof(*dh6o))
339 goto trunc;
340 dh6o = (struct dhcp6opt *)cp;
341 optlen = EXTRACT_16BITS(&dh6o->dh6opt_len);
342 if (ep < cp + sizeof(*dh6o) + optlen)
343 goto trunc;
344 opttype = EXTRACT_16BITS(&dh6o->dh6opt_type);
345 printf(" (%s", dhcp6opt_name(opttype));
346 switch (opttype) {
347 case DH6OPT_CLIENTID:
348 case DH6OPT_SERVERID:
349 if (optlen < 2) {
350 /*(*/
351 printf(" ?)");
352 break;
353 }
354 tp = (u_char *)(dh6o + 1);
355 switch (EXTRACT_16BITS(tp)) {
356 case 1:
357 if (optlen >= 2 + 6) {
358 printf(" hwaddr/time type %u time %u ",
359 EXTRACT_16BITS(&tp[2]),
360 EXTRACT_32BITS(&tp[4]));
361 for (i = 8; i < optlen; i++)
362 printf("%02x", tp[i]);
363 /*(*/
364 printf(")");
365 } else {
366 /*(*/
367 printf(" ?)");
368 }
369 break;
370 case 2:
371 if (optlen >= 2 + 8) {
372 printf(" vid ");
373 for (i = 2; i < 2 + 8; i++)
374 printf("%02x", tp[i]);
375 /*(*/
376 printf(")");
377 } else {
378 /*(*/
379 printf(" ?)");
380 }
381 break;
382 case 3:
383 if (optlen >= 2 + 2) {
384 printf(" hwaddr type %u ",
385 EXTRACT_16BITS(&tp[2]));
386 for (i = 4; i < optlen; i++)
387 printf("%02x", tp[i]);
388 /*(*/
389 printf(")");
390 } else {
391 /*(*/
392 printf(" ?)");
393 }
394 break;
395 default:
396 printf(" type %d)", EXTRACT_16BITS(tp));
397 break;
398 }
399 break;
400 case DH6OPT_IA_ADDR:
401 if (optlen < 24) {
402 /*(*/
403 printf(" ?)");
404 break;
405 }
406 tp = (u_char *)(dh6o + 1);
407 printf(" %s", ip6addr_string(&tp[0]));
408 printf(" pltime:%u vltime:%u",
409 EXTRACT_32BITS(&tp[16]),
410 EXTRACT_32BITS(&tp[20]));
411 if (optlen > 24) {
412 /* there are sub-options */
413 dhcp6opt_print(tp + 24, tp + 24 + optlen);
414 }
415 printf(")");
416 break;
417 case DH6OPT_ORO:
418 case DH6OPT_ERO:
419 if (optlen % 2) {
420 printf(" ?)");
421 break;
422 }
423 tp = (u_char *)(dh6o + 1);
424 for (i = 0; i < optlen; i += 2) {
425 printf(" %s",
426 dhcp6opt_name(EXTRACT_16BITS(&tp[i])));
427 }
428 printf(")");
429 break;
430 case DH6OPT_PREFERENCE:
431 if (optlen != 1) {
432 printf(" ?)");
433 break;
434 }
435 tp = (u_char *)(dh6o + 1);
436 printf(" %d)", *tp);
437 break;
438 case DH6OPT_ELAPSED_TIME:
439 if (optlen != 2) {
440 printf(" ?)");
441 break;
442 }
443 tp = (u_char *)(dh6o + 1);
444 printf(" %d)", EXTRACT_16BITS(tp));
445 break;
446 case DH6OPT_RELAY_MSG:
447 printf(" (");
448 tp = (u_char *)(dh6o + 1);
449 dhcp6_print(tp, optlen);
450 printf(")");
451 break;
452 case DH6OPT_AUTH:
453 if (optlen < 11) {
454 printf(" ?)");
455 break;
456 }
457 tp = (u_char *)(dh6o + 1);
458 auth_proto = *tp;
459 switch (auth_proto) {
460 case DH6OPT_AUTHPROTO_DELAYED:
461 printf(" proto: delayed");
462 break;
463 case DH6OPT_AUTHPROTO_RECONFIG:
464 printf(" proto: reconfigure");
465 break;
466 default:
467 printf(" proto: %d", auth_proto);
468 break;
469 }
470 tp++;
471 switch (*tp) {
472 case DH6OPT_AUTHALG_HMACMD5:
473 /* XXX: may depend on the protocol */
474 printf(", alg: HMAC-MD5");
475 break;
476 default:
477 printf(", alg: %d", *tp);
478 break;
479 }
480 tp++;
481 switch (*tp) {
482 case DH6OPT_AUTHRDM_MONOCOUNTER:
483 printf(", RDM: mono");
484 break;
485 default:
486 printf(", RDM: %d", *tp);
487 break;
488 }
489 tp++;
490 printf(", RD:");
491 for (i = 0; i < 4; i++, tp += 2)
492 printf(" %04x", EXTRACT_16BITS(tp));
493
494 /* protocol dependent part */
495 authinfolen = optlen - 11;
496 switch (auth_proto) {
497 case DH6OPT_AUTHPROTO_DELAYED:
498 if (authinfolen == 0)
499 break;
500 if (authinfolen < 20) {
501 printf(" ??");
502 break;
503 }
504 authrealmlen = authinfolen - 20;
505 if (authrealmlen > 0) {
506 printf(", realm: ");
507 }
508 for (i = 0; i < authrealmlen; i++, tp++)
509 printf("%02x", *tp);
510 printf(", key ID: %08x", EXTRACT_32BITS(tp));
511 tp += 4;
512 printf(", HMAC-MD5:");
513 for (i = 0; i < 4; i++, tp+= 4)
514 printf(" %08x", EXTRACT_32BITS(tp));
515 break;
516 case DH6OPT_AUTHPROTO_RECONFIG:
517 if (authinfolen != 17) {
518 printf(" ??");
519 break;
520 }
521 switch (*tp++) {
522 case DH6OPT_AUTHRECONFIG_KEY:
523 printf(" reconfig-key");
524 break;
525 case DH6OPT_AUTHRECONFIG_HMACMD5:
526 printf(" type: HMAC-MD5");
527 break;
528 default:
529 printf(" type: ??");
530 break;
531 }
532 printf(" value:");
533 for (i = 0; i < 4; i++, tp+= 4)
534 printf(" %08x", EXTRACT_32BITS(tp));
535 break;
536 default:
537 printf(" ??");
538 break;
539 }
540
541 printf(")");
542 break;
543 case DH6OPT_RAPID_COMMIT: /* nothing todo */
544 printf(")");
545 break;
546 case DH6OPT_INTERFACE_ID:
547 case DH6OPT_SUBSCRIBER_ID:
548 /*
549 * Since we cannot predict the encoding, print hex dump
550 * at most 10 characters.
551 */
552 tp = (u_char *)(dh6o + 1);
553 printf(" ");
554 for (i = 0; i < optlen && i < 10; i++)
555 printf("%02x", tp[i]);
556 printf("...)");
557 break;
558 case DH6OPT_RECONF_MSG:
559 tp = (u_char *)(dh6o + 1);
560 switch (*tp) {
561 case DH6_RENEW:
562 printf(" for renew)");
563 break;
564 case DH6_INFORM_REQ:
565 printf(" for inf-req)");
566 break;
567 default:
568 printf(" for ?\?\?(%02x))", *tp);
569 break;
570 }
571 break;
572 case DH6OPT_RECONF_ACCEPT: /* nothing todo */
573 printf(")");
574 break;
575 case DH6OPT_SIP_SERVER_A:
576 case DH6OPT_DNS:
577 case DH6OPT_NTP_SERVERS:
578 case DH6OPT_NIS_SERVERS:
579 case DH6OPT_NISP_SERVERS:
580 case DH6OPT_BCMCS_SERVER_A:
581 case DH6OPT_PANA_AGENT:
582 case DH6OPT_LQ_CLIENT_LINK:
583 if (optlen % 16) {
584 printf(" ?)");
585 break;
586 }
587 tp = (u_char *)(dh6o + 1);
588 for (i = 0; i < optlen; i += 16)
589 printf(" %s", ip6addr_string(&tp[i]));
590 printf(")");
591 break;
592 case DH6OPT_STATUS_CODE:
593 if (optlen < 2) {
594 printf(" ?)");
595 break;
596 }
597 tp = (u_char *)(dh6o + 1);
598 printf(" %s)", dhcp6stcode(EXTRACT_16BITS(&tp[0])));
599 break;
600 case DH6OPT_IA_NA:
601 case DH6OPT_IA_PD:
602 if (optlen < 12) {
603 printf(" ?)");
604 break;
605 }
606 tp = (u_char *)(dh6o + 1);
607 printf(" IAID:%u T1:%u T2:%u",
608 EXTRACT_32BITS(&tp[0]),
609 EXTRACT_32BITS(&tp[4]),
610 EXTRACT_32BITS(&tp[8]));
611 if (optlen > 12) {
612 /* there are sub-options */
613 dhcp6opt_print(tp + 12, tp + 12 + optlen);
614 }
615 printf(")");
616 break;
617 case DH6OPT_IA_TA:
618 if (optlen < 4) {
619 printf(" ?)");
620 break;
621 }
622 tp = (u_char *)(dh6o + 1);
623 printf(" IAID:%u", EXTRACT_32BITS(tp));
624 if (optlen > 4) {
625 /* there are sub-options */
626 dhcp6opt_print(tp + 4, tp + 4 + optlen);
627 }
628 printf(")");
629 break;
630 case DH6OPT_IA_PD_PREFIX:
631 if (optlen < 25) {
632 printf(" ?)");
633 break;
634 }
635 tp = (u_char *)(dh6o + 1);
636 printf(" %s/%d", ip6addr_string(&tp[9]), tp[8]);
637 printf(" pltime:%u vltime:%u",
638 EXTRACT_32BITS(&tp[0]),
639 EXTRACT_32BITS(&tp[4]));
640 if (optlen > 25) {
641 /* there are sub-options */
642 dhcp6opt_print(tp + 25, tp + 25 + optlen);
643 }
644 printf(")");
645 break;
646 case DH6OPT_LIFETIME:
647 case DH6OPT_CLT_TIME:
648 if (optlen != 4) {
649 printf(" ?)");
650 break;
651 }
652 tp = (u_char *)(dh6o + 1);
653 printf(" %d)", EXTRACT_32BITS(tp));
654 break;
655 case DH6OPT_REMOTE_ID:
656 if (optlen < 4) {
657 printf(" ?)");
658 break;
659 }
660 tp = (u_char *)(dh6o + 1);
661 printf(" %d ", EXTRACT_32BITS(tp));
662 /*
663 * Print hex dump first 10 characters.
664 */
665 for (i = 4; i < optlen && i < 14; i++)
666 printf("%02x", tp[i]);
667 printf("...)");
668 break;
669 case DH6OPT_LQ_QUERY:
670 if (optlen < 17) {
671 printf(" ?)");
672 break;
673 }
674 tp = (u_char *)(dh6o + 1);
675 switch (*tp) {
676 case 1:
677 printf(" by-address");
678 break;
679 case 2:
680 printf(" by-clientID");
681 break;
682 default:
683 printf(" type_%d", (int)*tp);
684 break;
685 }
686 printf(" %s", ip6addr_string(&tp[1]));
687 if (optlen > 17) {
688 /* there are query-options */
689 dhcp6opt_print(tp + 17, tp + optlen);
690 }
691 printf(")");
692 break;
693 case DH6OPT_CLIENT_DATA:
694 tp = (u_char *)(dh6o + 1);
695 if (optlen > 0) {
696 /* there are encapsulated options */
697 dhcp6opt_print(tp, tp + optlen);
698 }
699 printf(")");
700 break;
701 case DH6OPT_LQ_RELAY_DATA:
702 if (optlen < 16) {
703 printf(" ?)");
704 break;
705 }
706 tp = (u_char *)(dh6o + 1);
707 printf(" %s ", ip6addr_string(&tp[0]));
708 /*
709 * Print hex dump first 10 characters.
710 */
711 for (i = 16; i < optlen && i < 26; i++)
712 printf("%02x", tp[i]);
713 printf("...)");
714 break;
715 default:
716 printf(")");
717 break;
718 }
719
720 cp += sizeof(*dh6o) + optlen;
721 }
722 return;
723
724 trunc:
725 printf("[|dhcp6ext]");
726 }
727
728 /*
729 * Print dhcp6 packets
730 */
731 void
732 dhcp6_print(const u_char *cp, u_int length)
733 {
734 struct dhcp6 *dh6;
735 struct dhcp6_relay *dh6relay;
736 const u_char *ep;
737 u_char *extp;
738 const char *name;
739
740 printf("dhcp6");
741
742 ep = (u_char *)snapend;
743 if (cp + length < ep)
744 ep = cp + length;
745
746 dh6 = (struct dhcp6 *)cp;
747 dh6relay = (struct dhcp6_relay *)cp;
748 TCHECK(dh6->dh6_xid);
749 switch (dh6->dh6_msgtype) {
750 case DH6_SOLICIT:
751 name = "solicit";
752 break;
753 case DH6_ADVERTISE:
754 name = "advertise";
755 break;
756 case DH6_REQUEST:
757 name = "request";
758 break;
759 case DH6_CONFIRM:
760 name = "confirm";
761 break;
762 case DH6_RENEW:
763 name = "renew";
764 break;
765 case DH6_REBIND:
766 name = "rebind";
767 break;
768 case DH6_REPLY:
769 name = "reply";
770 break;
771 case DH6_RELEASE:
772 name = "release";
773 break;
774 case DH6_DECLINE:
775 name = "decline";
776 break;
777 case DH6_RECONFIGURE:
778 name = "reconfigure";
779 break;
780 case DH6_INFORM_REQ:
781 name= "inf-req";
782 break;
783 case DH6_RELAY_FORW:
784 name= "relay-fwd";
785 break;
786 case DH6_RELAY_REPLY:
787 name= "relay-reply";
788 break;
789 case DH6_LEASEQUERY:
790 name= "leasequery";
791 break;
792 case DH6_LQ_REPLY:
793 name= "leasequery-reply";
794 break;
795 default:
796 name = NULL;
797 break;
798 }
799
800 if (!vflag) {
801 if (name)
802 printf(" %s", name);
803 else if (dh6->dh6_msgtype != DH6_RELAY_FORW &&
804 dh6->dh6_msgtype != DH6_RELAY_REPLY) {
805 printf(" msgtype-%u", dh6->dh6_msgtype);
806 }
807 return;
808 }
809
810 /* XXX relay agent messages have to be handled differently */
811
812 if (name)
813 printf(" %s (", name); /*)*/
814 else
815 printf(" msgtype-%u (", dh6->dh6_msgtype); /*)*/
816 if (dh6->dh6_msgtype != DH6_RELAY_FORW &&
817 dh6->dh6_msgtype != DH6_RELAY_REPLY) {
818 printf("xid=%x", EXTRACT_32BITS(&dh6->dh6_xid) & DH6_XIDMASK);
819 extp = (u_char *)(dh6 + 1);
820 dhcp6opt_print(extp, ep);
821 } else { /* relay messages */
822 struct in6_addr addr6;
823
824 TCHECK(dh6relay->dh6relay_peeraddr);
825
826 memcpy(&addr6, dh6relay->dh6relay_linkaddr, sizeof (addr6));
827 printf("linkaddr=%s", ip6addr_string(&addr6));
828
829 memcpy(&addr6, dh6relay->dh6relay_peeraddr, sizeof (addr6));
830 printf(" peeraddr=%s", ip6addr_string(&addr6));
831
832 dhcp6opt_print((u_char *)(dh6relay + 1), ep);
833 }
834 /*(*/
835 printf(")");
836 return;
837
838 trunc:
839 printf("[|dhcp6]");
840 }
DragonFly BSD