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
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,
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 $";
51 #include <tcpdump-stdinc.h>
56 #include "interface.h"
57 #include "addrtoname.h"
61 #define DHCP6_DURATITION_INFINITE 0xffffffff
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
72 #define DH6_ADVERTISE 2
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
87 /* DHCP6 base packet format */
95 #define dh6_msgtype dh6_msgtypexid.m
96 #define dh6_xid dh6_msgtypexid.x
97 #define DH6_XIDMASK 0x00ffffff
99 /* DHCPv6 relay messages */
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];
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
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
177 u_int16_t dh6opt_type;
178 u_int16_t dh6opt_len;
179 /* type-dependent data follows */
183 dhcp6opt_name(int type)
185 static char genstr[sizeof("opt_65535") + 1]; /* XXX thread unsafe */
188 return "INVALID-option";
191 case DH6OPT_CLIENTID:
193 case DH6OPT_SERVERID:
202 return "option-request";
203 case DH6OPT_PREFERENCE:
205 case DH6OPT_ELAPSED_TIME:
206 return "elapsed-time";
207 case DH6OPT_RELAY_MSG:
208 return "relay-message";
210 return "authentication";
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:
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";
236 return "DNS-search-list";
239 case DH6OPT_IA_PD_PREFIX:
240 return "IA_PD-prefix";
241 case DH6OPT_NTP_SERVERS:
243 case DH6OPT_LIFETIME:
245 case DH6OPT_NIS_SERVERS:
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:
261 case DH6OPT_SUBSCRIBER_ID:
262 return "Subscriber-ID";
263 case DH6OPT_CLIENT_FQDN:
264 return "Client-FQDN";
265 case DH6OPT_PANA_AGENT:
267 case DH6OPT_NEW_POSIX_TIMEZONE:
268 return "POSIX-timezone";
269 case DH6OPT_NEW_TZDB_TIMEZONE:
270 return "POSIX-tz-database";
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:
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:
286 snprintf(genstr, sizeof(genstr), "opt_%d", type);
292 dhcp6stcode(int code)
294 static char genstr[sizeof("code255") + 1]; /* XXX thread unsafe */
297 return "INVALID code";
300 case DH6OPT_STCODE_SUCCESS:
302 case DH6OPT_STCODE_UNSPECFAIL:
303 return "unspec failure";
304 case DH6OPT_STCODE_NOADDRAVAIL:
305 return "no addresses";
306 case DH6OPT_STCODE_NOBINDING:
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";
323 snprintf(genstr, sizeof(genstr), "code%d", code);
329 dhcp6opt_print(const u_char *cp, const u_char *ep)
331 struct dhcp6opt *dh6o;
337 u_int authinfolen, authrealmlen;
342 if (ep < cp + sizeof(*dh6o))
344 dh6o = (struct dhcp6opt *)cp;
346 optlen = EXTRACT_16BITS(&dh6o->dh6opt_len);
347 if (ep < cp + sizeof(*dh6o) + optlen)
349 opttype = EXTRACT_16BITS(&dh6o->dh6opt_type);
350 printf(" (%s", dhcp6opt_name(opttype));
352 case DH6OPT_CLIENTID:
353 case DH6OPT_SERVERID:
359 tp = (u_char *)(dh6o + 1);
360 switch (EXTRACT_16BITS(tp)) {
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]);
376 if (optlen >= 2 + 8) {
378 for (i = 2; i < 2 + 8; i++)
379 printf("%02x", tp[i]);
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]);
401 printf(" type %d)", EXTRACT_16BITS(tp));
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]));
417 /* there are sub-options */
418 dhcp6opt_print(tp + 24, tp + optlen);
428 tp = (u_char *)(dh6o + 1);
429 for (i = 0; i < optlen; i += 2) {
431 dhcp6opt_name(EXTRACT_16BITS(&tp[i])));
435 case DH6OPT_PREFERENCE:
440 tp = (u_char *)(dh6o + 1);
443 case DH6OPT_ELAPSED_TIME:
448 tp = (u_char *)(dh6o + 1);
449 printf(" %d)", EXTRACT_16BITS(tp));
451 case DH6OPT_RELAY_MSG:
453 tp = (u_char *)(dh6o + 1);
454 dhcp6_print(tp, optlen);
462 tp = (u_char *)(dh6o + 1);
464 switch (auth_proto) {
465 case DH6OPT_AUTHPROTO_DELAYED:
466 printf(" proto: delayed");
468 case DH6OPT_AUTHPROTO_RECONFIG:
469 printf(" proto: reconfigure");
472 printf(" proto: %d", auth_proto);
477 case DH6OPT_AUTHALG_HMACMD5:
478 /* XXX: may depend on the protocol */
479 printf(", alg: HMAC-MD5");
482 printf(", alg: %d", *tp);
487 case DH6OPT_AUTHRDM_MONOCOUNTER:
488 printf(", RDM: mono");
491 printf(", RDM: %d", *tp);
496 for (i = 0; i < 4; i++, tp += 2)
497 printf(" %04x", EXTRACT_16BITS(tp));
499 /* protocol dependent part */
500 authinfolen = optlen - 11;
501 switch (auth_proto) {
502 case DH6OPT_AUTHPROTO_DELAYED:
503 if (authinfolen == 0)
505 if (authinfolen < 20) {
509 authrealmlen = authinfolen - 20;
510 if (authrealmlen > 0) {
513 for (i = 0; i < authrealmlen; i++, tp++)
515 printf(", key ID: %08x", EXTRACT_32BITS(tp));
517 printf(", HMAC-MD5:");
518 for (i = 0; i < 4; i++, tp+= 4)
519 printf(" %08x", EXTRACT_32BITS(tp));
521 case DH6OPT_AUTHPROTO_RECONFIG:
522 if (authinfolen != 17) {
527 case DH6OPT_AUTHRECONFIG_KEY:
528 printf(" reconfig-key");
530 case DH6OPT_AUTHRECONFIG_HMACMD5:
531 printf(" type: HMAC-MD5");
538 for (i = 0; i < 4; i++, tp+= 4)
539 printf(" %08x", EXTRACT_32BITS(tp));
548 case DH6OPT_RAPID_COMMIT: /* nothing todo */
551 case DH6OPT_INTERFACE_ID:
552 case DH6OPT_SUBSCRIBER_ID:
554 * Since we cannot predict the encoding, print hex dump
555 * at most 10 characters.
557 tp = (u_char *)(dh6o + 1);
559 for (i = 0; i < optlen && i < 10; i++)
560 printf("%02x", tp[i]);
563 case DH6OPT_RECONF_MSG:
564 tp = (u_char *)(dh6o + 1);
567 printf(" for renew)");
570 printf(" for inf-req)");
573 printf(" for ?\?\?(%02x))", *tp);
577 case DH6OPT_RECONF_ACCEPT: /* nothing todo */
580 case DH6OPT_SIP_SERVER_A:
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:
592 tp = (u_char *)(dh6o + 1);
593 for (i = 0; i < optlen; i += 16)
594 printf(" %s", ip6addr_string(&tp[i]));
597 case DH6OPT_STATUS_CODE:
602 tp = (u_char *)(dh6o + 1);
603 printf(" %s)", dhcp6stcode(EXTRACT_16BITS(&tp[0])));
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]));
617 /* there are sub-options */
618 dhcp6opt_print(tp + 12, tp + optlen);
627 tp = (u_char *)(dh6o + 1);
628 printf(" IAID:%u", EXTRACT_32BITS(tp));
630 /* there are sub-options */
631 dhcp6opt_print(tp + 4, tp + optlen);
635 case DH6OPT_IA_PD_PREFIX:
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]));
646 /* there are sub-options */
647 dhcp6opt_print(tp + 25, tp + optlen);
651 case DH6OPT_LIFETIME:
652 case DH6OPT_CLT_TIME:
657 tp = (u_char *)(dh6o + 1);
658 printf(" %d)", EXTRACT_32BITS(tp));
660 case DH6OPT_REMOTE_ID:
665 tp = (u_char *)(dh6o + 1);
666 printf(" %d ", EXTRACT_32BITS(tp));
668 * Print hex dump first 10 characters.
670 for (i = 4; i < optlen && i < 14; i++)
671 printf("%02x", tp[i]);
674 case DH6OPT_LQ_QUERY:
679 tp = (u_char *)(dh6o + 1);
682 printf(" by-address");
685 printf(" by-clientID");
688 printf(" type_%d", (int)*tp);
691 printf(" %s", ip6addr_string(&tp[1]));
693 /* there are query-options */
694 dhcp6opt_print(tp + 17, tp + optlen);
698 case DH6OPT_CLIENT_DATA:
699 tp = (u_char *)(dh6o + 1);
701 /* there are encapsulated options */
702 dhcp6opt_print(tp, tp + optlen);
706 case DH6OPT_LQ_RELAY_DATA:
711 tp = (u_char *)(dh6o + 1);
712 printf(" %s ", ip6addr_string(&tp[0]));
714 * Print hex dump first 10 characters.
716 for (i = 16; i < optlen && i < 26; i++)
717 printf("%02x", tp[i]);
720 case DH6OPT_AFTR_NAME:
725 tp = (u_char *)(dh6o + 1);
726 int remain_len = optlen;
728 /* Encoding is described in section 3.1 of RFC 1035 */
729 int label_len; /* Label length */
730 while (remain_len && *tp) {
732 if (label_len < remain_len - 1) {
733 printf("%.*s", label_len, tp);
735 remain_len -= (label_len + 1);
749 cp += sizeof(*dh6o) + optlen;
754 printf("[|dhcp6ext]");
758 * Print dhcp6 packets
761 dhcp6_print(const u_char *cp, u_int length)
764 struct dhcp6_relay *dh6relay;
771 ep = (u_char *)snapend;
772 if (cp + length < ep)
775 dh6 = (struct dhcp6 *)cp;
776 dh6relay = (struct dhcp6_relay *)cp;
777 TCHECK(dh6->dh6_xid);
778 switch (dh6->dh6_msgtype) {
806 case DH6_RECONFIGURE:
807 name = "reconfigure";
815 case DH6_RELAY_REPLY:
822 name= "leasequery-reply";
832 else if (dh6->dh6_msgtype != DH6_RELAY_FORW &&
833 dh6->dh6_msgtype != DH6_RELAY_REPLY) {
834 printf(" msgtype-%u", dh6->dh6_msgtype);
839 /* XXX relay agent messages have to be handled differently */
842 printf(" %s (", name); /*)*/
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;
853 TCHECK(dh6relay->dh6relay_peeraddr);
855 memcpy(&addr6, dh6relay->dh6relay_linkaddr, sizeof (addr6));
856 printf("linkaddr=%s", ip6addr_string(&addr6));
858 memcpy(&addr6, dh6relay->dh6relay_peeraddr, sizeof (addr6));
859 printf(" peeraddr=%s", ip6addr_string(&addr6));
861 dhcp6opt_print((u_char *)(dh6relay + 1), ep);