2 * Copyright (C) 1998 and 1999 WIDE Project.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
30 /* \summary: IPv6 DHCP printer */
34 * supported DHCPv6 options:
35 * RFC3319: Session Initiation Protocol (SIP) Servers options,
36 * RFC3633: IPv6 Prefix options,
37 * RFC3646: DNS Configuration options,
38 * RFC3898: Network Information Service (NIS) Configuration options,
39 * RFC4075: Simple Network Time Protocol (SNTP) Configuration option,
40 * RFC4242: Information Refresh Time option,
41 * RFC4280: Broadcast and Multicast Control Servers options,
42 * RFC5908: Network Time Protocol (NTP) Server Option for DHCPv6
43 * RFC6334: Dual-Stack Lite option,
50 #include <netdissect-stdinc.h>
55 #include "netdissect.h"
56 #include "addrtoname.h"
60 #define DHCP6_DURATION_INFINITE 0xffffffff
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
71 #define DH6_ADVERTISE 2
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
86 static const struct tok dh6_msgtype_str[] = {
87 { DH6_SOLICIT, "solicit" },
88 { DH6_ADVERTISE, "advertise" },
89 { DH6_REQUEST, "request" },
90 { DH6_CONFIRM, "confirm" },
91 { DH6_RENEW, "renew" },
92 { DH6_REBIND, "rebind" },
93 { DH6_REPLY, "reply" },
94 { DH6_RELEASE, "release" },
95 { DH6_DECLINE, "decline" },
96 { DH6_RECONFIGURE, "reconfigure" },
97 { DH6_INFORM_REQ, "inf-req" },
98 { DH6_RELAY_FORW, "relay-fwd" },
99 { DH6_RELAY_REPLY, "relay-reply" },
100 { DH6_LEASEQUERY, "leasequery" },
101 { DH6_LQ_REPLY, "leasequery-reply" },
105 /* DHCP6 base packet format */
113 #define dh6_msgtype dh6_msgtypexid.m
114 #define dh6_xid dh6_msgtypexid.x
115 #define DH6_XIDMASK 0x00ffffff
117 /* DHCPv6 relay messages */
119 nd_uint8_t dh6relay_msgtype;
120 nd_uint8_t dh6relay_hcnt;
121 nd_uint8_t dh6relay_linkaddr[16]; /* XXX: badly aligned */
122 nd_uint8_t dh6relay_peeraddr[16];
127 #define DH6OPT_CLIENTID 1
128 #define DH6OPT_SERVERID 2
129 #define DH6OPT_IA_NA 3
130 #define DH6OPT_IA_TA 4
131 #define DH6OPT_IA_ADDR 5
133 #define DH6OPT_PREFERENCE 7
134 # define DH6OPT_PREF_MAX 255
135 #define DH6OPT_ELAPSED_TIME 8
136 #define DH6OPT_RELAY_MSG 9
137 /*#define DH6OPT_SERVER_MSG 10 deprecated */
138 #define DH6OPT_AUTH 11
139 # define DH6OPT_AUTHPROTO_DELAYED 2
140 # define DH6OPT_AUTHPROTO_RECONFIG 3
141 # define DH6OPT_AUTHALG_HMACMD5 1
142 # define DH6OPT_AUTHRDM_MONOCOUNTER 0
143 # define DH6OPT_AUTHRECONFIG_KEY 1
144 # define DH6OPT_AUTHRECONFIG_HMACMD5 2
145 #define DH6OPT_UNICAST 12
146 #define DH6OPT_STATUS_CODE 13
147 # define DH6OPT_STCODE_SUCCESS 0
148 # define DH6OPT_STCODE_UNSPECFAIL 1
149 # define DH6OPT_STCODE_NOADDRAVAIL 2
150 # define DH6OPT_STCODE_NOBINDING 3
151 # define DH6OPT_STCODE_NOTONLINK 4
152 # define DH6OPT_STCODE_USEMULTICAST 5
153 # define DH6OPT_STCODE_NOPREFIXAVAIL 6
154 # define DH6OPT_STCODE_UNKNOWNQUERYTYPE 7
155 # define DH6OPT_STCODE_MALFORMEDQUERY 8
156 # define DH6OPT_STCODE_NOTCONFIGURED 9
157 # define DH6OPT_STCODE_NOTALLOWED 10
158 #define DH6OPT_RAPID_COMMIT 14
159 #define DH6OPT_USER_CLASS 15
160 #define DH6OPT_VENDOR_CLASS 16
161 #define DH6OPT_VENDOR_OPTS 17
162 #define DH6OPT_INTERFACE_ID 18
163 #define DH6OPT_RECONF_MSG 19
164 #define DH6OPT_RECONF_ACCEPT 20
165 #define DH6OPT_SIP_SERVER_D 21
166 #define DH6OPT_SIP_SERVER_A 22
167 #define DH6OPT_DNS_SERVERS 23
168 #define DH6OPT_DOMAIN_LIST 24
169 #define DH6OPT_IA_PD 25
170 #define DH6OPT_IA_PD_PREFIX 26
171 #define DH6OPT_NIS_SERVERS 27
172 #define DH6OPT_NISP_SERVERS 28
173 #define DH6OPT_NIS_NAME 29
174 #define DH6OPT_NISP_NAME 30
175 #define DH6OPT_SNTP_SERVERS 31
176 #define DH6OPT_LIFETIME 32
177 #define DH6OPT_BCMCS_SERVER_D 33
178 #define DH6OPT_BCMCS_SERVER_A 34
179 #define DH6OPT_GEOCONF_CIVIC 36
180 #define DH6OPT_REMOTE_ID 37
181 #define DH6OPT_SUBSCRIBER_ID 38
182 #define DH6OPT_CLIENT_FQDN 39
183 #define DH6OPT_PANA_AGENT 40
184 #define DH6OPT_NEW_POSIX_TIMEZONE 41
185 #define DH6OPT_NEW_TZDB_TIMEZONE 42
186 #define DH6OPT_ERO 43
187 #define DH6OPT_LQ_QUERY 44
188 #define DH6OPT_CLIENT_DATA 45
189 #define DH6OPT_CLT_TIME 46
190 #define DH6OPT_LQ_RELAY_DATA 47
191 #define DH6OPT_LQ_CLIENT_LINK 48
192 #define DH6OPT_NTP_SERVER 56
193 # define DH6OPT_NTP_SUBOPTION_SRV_ADDR 1
194 # define DH6OPT_NTP_SUBOPTION_MC_ADDR 2
195 # define DH6OPT_NTP_SUBOPTION_SRV_FQDN 3
196 #define DH6OPT_AFTR_NAME 64
197 #define DH6OPT_MUDURL 112
199 static const struct tok dh6opt_str[] = {
200 { DH6OPT_CLIENTID, "client-ID" },
201 { DH6OPT_SERVERID, "server-ID" },
202 { DH6OPT_IA_NA, "IA_NA" },
203 { DH6OPT_IA_TA, "IA_TA" },
204 { DH6OPT_IA_ADDR, "IA_ADDR" },
205 { DH6OPT_ORO, "option-request" },
206 { DH6OPT_PREFERENCE, "preference" },
207 { DH6OPT_ELAPSED_TIME, "elapsed-time" },
208 { DH6OPT_RELAY_MSG, "relay-message" },
209 { DH6OPT_AUTH, "authentication" },
210 { DH6OPT_UNICAST, "server-unicast" },
211 { DH6OPT_STATUS_CODE, "status-code" },
212 { DH6OPT_RAPID_COMMIT, "rapid-commit" },
213 { DH6OPT_USER_CLASS, "user-class" },
214 { DH6OPT_VENDOR_CLASS, "vendor-class" },
215 { DH6OPT_VENDOR_OPTS, "vendor-specific-info" },
216 { DH6OPT_INTERFACE_ID, "interface-ID" },
217 { DH6OPT_RECONF_MSG, "reconfigure-message" },
218 { DH6OPT_RECONF_ACCEPT, "reconfigure-accept" },
219 { DH6OPT_SIP_SERVER_D, "SIP-servers-domain" },
220 { DH6OPT_SIP_SERVER_A, "SIP-servers-address" },
221 { DH6OPT_DNS_SERVERS, "DNS-server" },
222 { DH6OPT_DOMAIN_LIST, "DNS-search-list" },
223 { DH6OPT_IA_PD, "IA_PD" },
224 { DH6OPT_IA_PD_PREFIX, "IA_PD-prefix" },
225 { DH6OPT_SNTP_SERVERS, "SNTP-servers" },
226 { DH6OPT_LIFETIME, "lifetime" },
227 { DH6OPT_NIS_SERVERS, "NIS-server" },
228 { DH6OPT_NISP_SERVERS, "NIS+-server" },
229 { DH6OPT_NIS_NAME, "NIS-domain-name" },
230 { DH6OPT_NISP_NAME, "NIS+-domain-name" },
231 { DH6OPT_BCMCS_SERVER_D, "BCMCS-domain-name" },
232 { DH6OPT_BCMCS_SERVER_A, "BCMCS-server" },
233 { DH6OPT_GEOCONF_CIVIC, "Geoconf-Civic" },
234 { DH6OPT_REMOTE_ID, "Remote-ID" },
235 { DH6OPT_SUBSCRIBER_ID, "Subscriber-ID" },
236 { DH6OPT_CLIENT_FQDN, "Client-FQDN" },
237 { DH6OPT_PANA_AGENT, "PANA-agent" },
238 { DH6OPT_NEW_POSIX_TIMEZONE, "POSIX-timezone" },
239 { DH6OPT_NEW_TZDB_TIMEZONE, "POSIX-tz-database" },
240 { DH6OPT_ERO, "Echo-request-option" },
241 { DH6OPT_LQ_QUERY, "Lease-query" },
242 { DH6OPT_CLIENT_DATA, "LQ-client-data" },
243 { DH6OPT_CLT_TIME, "Clt-time" },
244 { DH6OPT_LQ_RELAY_DATA, "LQ-relay-data" },
245 { DH6OPT_LQ_CLIENT_LINK, "LQ-client-link" },
246 { DH6OPT_NTP_SERVER, "NTP-server" },
247 { DH6OPT_AFTR_NAME, "AFTR-Name" },
248 { DH6OPT_MUDURL, "MUD-URL" },
252 static const struct tok dh6opt_stcode_str[] = {
253 { DH6OPT_STCODE_SUCCESS, "Success" }, /* RFC3315 */
254 { DH6OPT_STCODE_UNSPECFAIL, "UnspecFail" }, /* RFC3315 */
255 { DH6OPT_STCODE_NOADDRAVAIL, "NoAddrsAvail" }, /* RFC3315 */
256 { DH6OPT_STCODE_NOBINDING, "NoBinding" }, /* RFC3315 */
257 { DH6OPT_STCODE_NOTONLINK, "NotOnLink" }, /* RFC3315 */
258 { DH6OPT_STCODE_USEMULTICAST, "UseMulticast" }, /* RFC3315 */
259 { DH6OPT_STCODE_NOPREFIXAVAIL, "NoPrefixAvail" }, /* RFC3633 */
260 { DH6OPT_STCODE_UNKNOWNQUERYTYPE, "UnknownQueryType" }, /* RFC5007 */
261 { DH6OPT_STCODE_MALFORMEDQUERY, "MalformedQuery" }, /* RFC5007 */
262 { DH6OPT_STCODE_NOTCONFIGURED, "NotConfigured" }, /* RFC5007 */
263 { DH6OPT_STCODE_NOTALLOWED, "NotAllowed" }, /* RFC5007 */
268 nd_uint16_t dh6opt_type;
269 nd_uint16_t dh6opt_len;
270 /* type-dependent data follows */
274 dhcp6stcode(const uint16_t code)
276 return code > 255 ? "INVALID code" : tok2str(dh6opt_stcode_str, "code%u", code);
280 dhcp6opt_print(netdissect_options *ndo,
281 const u_char *cp, const u_char *ep)
283 const struct dhcp6opt *dh6o;
289 u_int authinfolen, authrealmlen;
290 int remain_len; /* Length of remaining options */
291 int label_len; /* Label length */
292 uint16_t subopt_code;
298 if (ep < cp + sizeof(*dh6o))
300 dh6o = (const struct dhcp6opt *)cp;
302 optlen = EXTRACT_16BITS(&dh6o->dh6opt_len);
303 if (ep < cp + sizeof(*dh6o) + optlen)
305 opttype = EXTRACT_16BITS(&dh6o->dh6opt_type);
306 ND_PRINT((ndo, " (%s", tok2str(dh6opt_str, "opt_%u", opttype)));
307 ND_TCHECK2(*(cp + sizeof(*dh6o)), optlen);
309 case DH6OPT_CLIENTID:
310 case DH6OPT_SERVERID:
313 ND_PRINT((ndo, " ?)"));
316 tp = (const u_char *)(dh6o + 1);
317 switch (EXTRACT_16BITS(tp)) {
319 if (optlen >= 2 + 6) {
320 ND_PRINT((ndo, " hwaddr/time type %u time %u ",
321 EXTRACT_16BITS(&tp[2]),
322 EXTRACT_32BITS(&tp[4])));
323 for (i = 8; i < optlen; i++)
324 ND_PRINT((ndo, "%02x", tp[i]));
326 ND_PRINT((ndo, ")"));
329 ND_PRINT((ndo, " ?)"));
333 if (optlen >= 2 + 8) {
334 ND_PRINT((ndo, " vid "));
335 for (i = 2; i < 2 + 8; i++)
336 ND_PRINT((ndo, "%02x", tp[i]));
338 ND_PRINT((ndo, ")"));
341 ND_PRINT((ndo, " ?)"));
345 if (optlen >= 2 + 2) {
346 ND_PRINT((ndo, " hwaddr type %u ",
347 EXTRACT_16BITS(&tp[2])));
348 for (i = 4; i < optlen; i++)
349 ND_PRINT((ndo, "%02x", tp[i]));
351 ND_PRINT((ndo, ")"));
354 ND_PRINT((ndo, " ?)"));
358 ND_PRINT((ndo, " type %d)", EXTRACT_16BITS(tp)));
365 ND_PRINT((ndo, " ?)"));
368 tp = (const u_char *)(dh6o + 1);
369 ND_PRINT((ndo, " %s", ip6addr_string(ndo, &tp[0])));
370 ND_PRINT((ndo, " pltime:%u vltime:%u",
371 EXTRACT_32BITS(&tp[16]),
372 EXTRACT_32BITS(&tp[20])));
374 /* there are sub-options */
375 dhcp6opt_print(ndo, tp + 24, tp + optlen);
377 ND_PRINT((ndo, ")"));
382 ND_PRINT((ndo, " ?)"));
385 tp = (const u_char *)(dh6o + 1);
386 for (i = 0; i < optlen; i += 2) {
387 ND_PRINT((ndo, " %s",
388 tok2str(dh6opt_str, "opt_%u", EXTRACT_16BITS(&tp[i]))));
390 ND_PRINT((ndo, ")"));
392 case DH6OPT_PREFERENCE:
394 ND_PRINT((ndo, " ?)"));
397 tp = (const u_char *)(dh6o + 1);
398 ND_PRINT((ndo, " %d)", *tp));
400 case DH6OPT_ELAPSED_TIME:
402 ND_PRINT((ndo, " ?)"));
405 tp = (const u_char *)(dh6o + 1);
406 ND_PRINT((ndo, " %d)", EXTRACT_16BITS(tp)));
408 case DH6OPT_RELAY_MSG:
409 ND_PRINT((ndo, " ("));
410 tp = (const u_char *)(dh6o + 1);
411 dhcp6_print(ndo, tp, optlen);
412 ND_PRINT((ndo, ")"));
416 ND_PRINT((ndo, " ?)"));
419 tp = (const u_char *)(dh6o + 1);
421 switch (auth_proto) {
422 case DH6OPT_AUTHPROTO_DELAYED:
423 ND_PRINT((ndo, " proto: delayed"));
425 case DH6OPT_AUTHPROTO_RECONFIG:
426 ND_PRINT((ndo, " proto: reconfigure"));
429 ND_PRINT((ndo, " proto: %d", auth_proto));
434 case DH6OPT_AUTHALG_HMACMD5:
435 /* XXX: may depend on the protocol */
436 ND_PRINT((ndo, ", alg: HMAC-MD5"));
439 ND_PRINT((ndo, ", alg: %d", *tp));
444 case DH6OPT_AUTHRDM_MONOCOUNTER:
445 ND_PRINT((ndo, ", RDM: mono"));
448 ND_PRINT((ndo, ", RDM: %d", *tp));
452 ND_PRINT((ndo, ", RD:"));
453 for (i = 0; i < 4; i++, tp += 2)
454 ND_PRINT((ndo, " %04x", EXTRACT_16BITS(tp)));
456 /* protocol dependent part */
457 authinfolen = optlen - 11;
458 switch (auth_proto) {
459 case DH6OPT_AUTHPROTO_DELAYED:
460 if (authinfolen == 0)
462 if (authinfolen < 20) {
463 ND_PRINT((ndo, " ??"));
466 authrealmlen = authinfolen - 20;
467 if (authrealmlen > 0) {
468 ND_PRINT((ndo, ", realm: "));
470 for (i = 0; i < authrealmlen; i++, tp++)
471 ND_PRINT((ndo, "%02x", *tp));
472 ND_PRINT((ndo, ", key ID: %08x", EXTRACT_32BITS(tp)));
474 ND_PRINT((ndo, ", HMAC-MD5:"));
475 for (i = 0; i < 4; i++, tp+= 4)
476 ND_PRINT((ndo, " %08x", EXTRACT_32BITS(tp)));
478 case DH6OPT_AUTHPROTO_RECONFIG:
479 if (authinfolen != 17) {
480 ND_PRINT((ndo, " ??"));
484 case DH6OPT_AUTHRECONFIG_KEY:
485 ND_PRINT((ndo, " reconfig-key"));
487 case DH6OPT_AUTHRECONFIG_HMACMD5:
488 ND_PRINT((ndo, " type: HMAC-MD5"));
491 ND_PRINT((ndo, " type: ??"));
494 ND_PRINT((ndo, " value:"));
495 for (i = 0; i < 4; i++, tp+= 4)
496 ND_PRINT((ndo, " %08x", EXTRACT_32BITS(tp)));
499 ND_PRINT((ndo, " ??"));
503 ND_PRINT((ndo, ")"));
505 case DH6OPT_RAPID_COMMIT: /* nothing todo */
506 ND_PRINT((ndo, ")"));
508 case DH6OPT_INTERFACE_ID:
509 case DH6OPT_SUBSCRIBER_ID:
511 * Since we cannot predict the encoding, print hex dump
512 * at most 10 characters.
514 tp = (const u_char *)(dh6o + 1);
515 ND_PRINT((ndo, " "));
516 for (i = 0; i < optlen && i < 10; i++)
517 ND_PRINT((ndo, "%02x", tp[i]));
518 ND_PRINT((ndo, "...)"));
520 case DH6OPT_RECONF_MSG:
522 ND_PRINT((ndo, " ?)"));
525 tp = (const u_char *)(dh6o + 1);
528 ND_PRINT((ndo, " for renew)"));
531 ND_PRINT((ndo, " for inf-req)"));
534 ND_PRINT((ndo, " for ?\?\?(%02x))", *tp));
538 case DH6OPT_RECONF_ACCEPT: /* nothing todo */
539 ND_PRINT((ndo, ")"));
541 case DH6OPT_SIP_SERVER_A:
542 case DH6OPT_DNS_SERVERS:
543 case DH6OPT_SNTP_SERVERS:
544 case DH6OPT_NIS_SERVERS:
545 case DH6OPT_NISP_SERVERS:
546 case DH6OPT_BCMCS_SERVER_A:
547 case DH6OPT_PANA_AGENT:
548 case DH6OPT_LQ_CLIENT_LINK:
550 ND_PRINT((ndo, " ?)"));
553 tp = (const u_char *)(dh6o + 1);
554 for (i = 0; i < optlen; i += 16)
555 ND_PRINT((ndo, " %s", ip6addr_string(ndo, &tp[i])));
556 ND_PRINT((ndo, ")"));
558 case DH6OPT_SIP_SERVER_D:
559 case DH6OPT_DOMAIN_LIST:
560 tp = (const u_char *)(dh6o + 1);
561 while (tp < cp + sizeof(*dh6o) + optlen) {
562 ND_PRINT((ndo, " "));
563 if ((tp = ns_nprint(ndo, tp, cp + sizeof(*dh6o) + optlen)) == NULL)
566 ND_PRINT((ndo, ")"));
568 case DH6OPT_STATUS_CODE:
570 ND_PRINT((ndo, " ?)"));
573 tp = (const u_char *)(dh6o + 1);
574 ND_PRINT((ndo, " %s)", dhcp6stcode(EXTRACT_16BITS(&tp[0]))));
579 ND_PRINT((ndo, " ?)"));
582 tp = (const u_char *)(dh6o + 1);
583 ND_PRINT((ndo, " IAID:%u T1:%u T2:%u",
584 EXTRACT_32BITS(&tp[0]),
585 EXTRACT_32BITS(&tp[4]),
586 EXTRACT_32BITS(&tp[8])));
588 /* there are sub-options */
589 dhcp6opt_print(ndo, tp + 12, tp + optlen);
591 ND_PRINT((ndo, ")"));
595 ND_PRINT((ndo, " ?)"));
598 tp = (const u_char *)(dh6o + 1);
599 ND_PRINT((ndo, " IAID:%u", EXTRACT_32BITS(tp)));
601 /* there are sub-options */
602 dhcp6opt_print(ndo, tp + 4, tp + optlen);
604 ND_PRINT((ndo, ")"));
606 case DH6OPT_IA_PD_PREFIX:
608 ND_PRINT((ndo, " ?)"));
611 tp = (const u_char *)(dh6o + 1);
612 ND_PRINT((ndo, " %s/%d", ip6addr_string(ndo, &tp[9]), tp[8]));
613 ND_PRINT((ndo, " pltime:%u vltime:%u",
614 EXTRACT_32BITS(&tp[0]),
615 EXTRACT_32BITS(&tp[4])));
617 /* there are sub-options */
618 dhcp6opt_print(ndo, tp + 25, tp + optlen);
620 ND_PRINT((ndo, ")"));
622 case DH6OPT_LIFETIME:
623 case DH6OPT_CLT_TIME:
625 ND_PRINT((ndo, " ?)"));
628 tp = (const u_char *)(dh6o + 1);
629 ND_PRINT((ndo, " %d)", EXTRACT_32BITS(tp)));
631 case DH6OPT_REMOTE_ID:
633 ND_PRINT((ndo, " ?)"));
636 tp = (const u_char *)(dh6o + 1);
637 ND_PRINT((ndo, " %d ", EXTRACT_32BITS(tp)));
639 * Print hex dump first 10 characters.
641 for (i = 4; i < optlen && i < 14; i++)
642 ND_PRINT((ndo, "%02x", tp[i]));
643 ND_PRINT((ndo, "...)"));
645 case DH6OPT_LQ_QUERY:
647 ND_PRINT((ndo, " ?)"));
650 tp = (const u_char *)(dh6o + 1);
653 ND_PRINT((ndo, " by-address"));
656 ND_PRINT((ndo, " by-clientID"));
659 ND_PRINT((ndo, " type_%d", (int)*tp));
662 ND_PRINT((ndo, " %s", ip6addr_string(ndo, &tp[1])));
664 /* there are query-options */
665 dhcp6opt_print(ndo, tp + 17, tp + optlen);
667 ND_PRINT((ndo, ")"));
669 case DH6OPT_CLIENT_DATA:
670 tp = (const u_char *)(dh6o + 1);
672 /* there are encapsulated options */
673 dhcp6opt_print(ndo, tp, tp + optlen);
675 ND_PRINT((ndo, ")"));
677 case DH6OPT_LQ_RELAY_DATA:
679 ND_PRINT((ndo, " ?)"));
682 tp = (const u_char *)(dh6o + 1);
683 ND_PRINT((ndo, " %s ", ip6addr_string(ndo, &tp[0])));
685 * Print hex dump first 10 characters.
687 for (i = 16; i < optlen && i < 26; i++)
688 ND_PRINT((ndo, "%02x", tp[i]));
689 ND_PRINT((ndo, "...)"));
691 case DH6OPT_NTP_SERVER:
693 ND_PRINT((ndo, " ?)"));
696 tp = (const u_char *)(dh6o + 1);
697 while (tp < cp + sizeof(*dh6o) + optlen - 4) {
698 subopt_code = EXTRACT_16BITS(tp);
700 subopt_len = EXTRACT_16BITS(tp);
702 if (tp + subopt_len > cp + sizeof(*dh6o) + optlen)
704 ND_PRINT((ndo, " subopt:%d", subopt_code));
705 switch (subopt_code) {
706 case DH6OPT_NTP_SUBOPTION_SRV_ADDR:
707 case DH6OPT_NTP_SUBOPTION_MC_ADDR:
708 if (subopt_len != 16) {
709 ND_PRINT((ndo, " ?"));
712 ND_PRINT((ndo, " %s", ip6addr_string(ndo, &tp[0])));
714 case DH6OPT_NTP_SUBOPTION_SRV_FQDN:
715 ND_PRINT((ndo, " "));
716 if (ns_nprint(ndo, tp, tp + subopt_len) == NULL)
720 ND_PRINT((ndo, " ?"));
725 ND_PRINT((ndo, ")"));
727 case DH6OPT_AFTR_NAME:
729 ND_PRINT((ndo, " ?)"));
732 tp = (const u_char *)(dh6o + 1);
734 ND_PRINT((ndo, " "));
735 /* Encoding is described in section 3.1 of RFC 1035 */
736 while (remain_len && *tp) {
738 if (label_len < remain_len - 1) {
739 (void)fn_printn(ndo, tp, label_len, NULL);
741 remain_len -= (label_len + 1);
742 if(*tp) ND_PRINT((ndo, "."));
744 ND_PRINT((ndo, " ?"));
748 ND_PRINT((ndo, ")"));
750 case DH6OPT_NEW_POSIX_TIMEZONE: /* all three of these options */
751 case DH6OPT_NEW_TZDB_TIMEZONE: /* are encoded similarly */
752 case DH6OPT_MUDURL: /* although GMT might not work */
754 ND_PRINT((ndo, " ?)"));
757 tp = (const u_char *)(dh6o + 1);
758 ND_PRINT((ndo, "="));
759 (void)fn_printn(ndo, tp, (u_int)optlen, NULL);
760 ND_PRINT((ndo, ")"));
764 ND_PRINT((ndo, ")"));
768 cp += sizeof(*dh6o) + optlen;
773 ND_PRINT((ndo, "[|dhcp6ext]"));
777 * Print dhcp6 packets
780 dhcp6_print(netdissect_options *ndo,
781 const u_char *cp, u_int length)
783 const struct dhcp6 *dh6;
784 const struct dhcp6_relay *dh6relay;
789 ND_PRINT((ndo, "dhcp6"));
791 ep = (const u_char *)ndo->ndo_snapend;
792 if (cp + length < ep)
795 dh6 = (const struct dhcp6 *)cp;
796 dh6relay = (const struct dhcp6_relay *)cp;
797 ND_TCHECK(dh6->dh6_xid);
798 name = tok2str(dh6_msgtype_str, "msgtype-%u", dh6->dh6_msgtype);
800 if (!ndo->ndo_vflag) {
801 ND_PRINT((ndo, " %s", name));
805 /* XXX relay agent messages have to be handled differently */
807 ND_PRINT((ndo, " %s (", name)); /*)*/
808 if (dh6->dh6_msgtype != DH6_RELAY_FORW &&
809 dh6->dh6_msgtype != DH6_RELAY_REPLY) {
810 ND_PRINT((ndo, "xid=%x", EXTRACT_32BITS(&dh6->dh6_xid) & DH6_XIDMASK));
811 extp = (const u_char *)(dh6 + 1);
812 dhcp6opt_print(ndo, extp, ep);
813 } else { /* relay messages */
814 struct in6_addr addr6;
816 ND_TCHECK(dh6relay->dh6relay_peeraddr);
818 memcpy(&addr6, dh6relay->dh6relay_linkaddr, sizeof (addr6));
819 ND_PRINT((ndo, "linkaddr=%s", ip6addr_string(ndo, &addr6)));
821 memcpy(&addr6, dh6relay->dh6relay_peeraddr, sizeof (addr6));
822 ND_PRINT((ndo, " peeraddr=%s", ip6addr_string(ndo, &addr6)));
824 dhcp6opt_print(ndo, (const u_char *)(dh6relay + 1), ep);
827 ND_PRINT((ndo, ")"));
831 ND_PRINT((ndo, "[|dhcp6]"));