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:
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 $";
50 #include <tcpdump-stdinc.h>
55 #include "interface.h"
56 #include "addrtoname.h"
60 #define DHCP6_DURATITION_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 /* DHCP6 base packet format */
94 #define dh6_msgtype dh6_msgtypexid.m
95 #define dh6_xid dh6_msgtypexid.x
96 #define DH6_XIDMASK 0x00ffffff
98 /* DHCPv6 relay messages */
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];
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
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
175 u_int16_t dh6opt_type;
176 u_int16_t dh6opt_len;
177 /* type-dependent data follows */
181 dhcp6opt_name(int type)
183 static char genstr[sizeof("opt_65535") + 1]; /* XXX thread unsafe */
186 return "INVALID-option";
189 case DH6OPT_CLIENTID:
191 case DH6OPT_SERVERID:
200 return "option-request";
201 case DH6OPT_PREFERENCE:
203 case DH6OPT_ELAPSED_TIME:
204 return "elapsed-time";
205 case DH6OPT_RELAY_MSG:
206 return "relay-message";
208 return "authentication";
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:
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";
234 return "DNS-search-list";
237 case DH6OPT_IA_PD_PREFIX:
238 return "IA_PD-prefix";
239 case DH6OPT_NTP_SERVERS:
241 case DH6OPT_LIFETIME:
243 case DH6OPT_NIS_SERVERS:
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:
259 case DH6OPT_SUBSCRIBER_ID:
260 return "Subscriber-ID";
261 case DH6OPT_CLIENT_FQDN:
262 return "Client-FQDN";
263 case DH6OPT_PANA_AGENT:
265 case DH6OPT_NEW_POSIX_TIMEZONE:
266 return "POSIX-timezone";
267 case DH6OPT_NEW_TZDB_TIMEZONE:
268 return "POSIX-tz-database";
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:
277 case DH6OPT_LQ_RELAY_DATA:
278 return "LQ-relay-data";
279 case DH6OPT_LQ_CLIENT_LINK:
280 return "LQ-client-link";
282 snprintf(genstr, sizeof(genstr), "opt_%d", type);
288 dhcp6stcode(int code)
290 static char genstr[sizeof("code255") + 1]; /* XXX thread unsafe */
293 return "INVALID code";
296 case DH6OPT_STCODE_SUCCESS:
298 case DH6OPT_STCODE_UNSPECFAIL:
299 return "unspec failure";
300 case DH6OPT_STCODE_NOADDRAVAIL:
301 return "no addresses";
302 case DH6OPT_STCODE_NOBINDING:
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";
319 snprintf(genstr, sizeof(genstr), "code%d", code);
325 dhcp6opt_print(const u_char *cp, const u_char *ep)
327 struct dhcp6opt *dh6o;
333 u_int authinfolen, authrealmlen;
338 if (ep < cp + sizeof(*dh6o))
340 dh6o = (struct dhcp6opt *)cp;
341 optlen = EXTRACT_16BITS(&dh6o->dh6opt_len);
342 if (ep < cp + sizeof(*dh6o) + optlen)
344 opttype = EXTRACT_16BITS(&dh6o->dh6opt_type);
345 printf(" (%s", dhcp6opt_name(opttype));
347 case DH6OPT_CLIENTID:
348 case DH6OPT_SERVERID:
354 tp = (u_char *)(dh6o + 1);
355 switch (EXTRACT_16BITS(tp)) {
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]);
371 if (optlen >= 2 + 8) {
373 for (i = 2; i < 2 + 8; i++)
374 printf("%02x", tp[i]);
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]);
396 printf(" type %d)", EXTRACT_16BITS(tp));
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]));
412 /* there are sub-options */
413 dhcp6opt_print(tp + 24, tp + 24 + optlen);
423 tp = (u_char *)(dh6o + 1);
424 for (i = 0; i < optlen; i += 2) {
426 dhcp6opt_name(EXTRACT_16BITS(&tp[i])));
430 case DH6OPT_PREFERENCE:
435 tp = (u_char *)(dh6o + 1);
438 case DH6OPT_ELAPSED_TIME:
443 tp = (u_char *)(dh6o + 1);
444 printf(" %d)", EXTRACT_16BITS(tp));
446 case DH6OPT_RELAY_MSG:
448 tp = (u_char *)(dh6o + 1);
449 dhcp6_print(tp, optlen);
457 tp = (u_char *)(dh6o + 1);
459 switch (auth_proto) {
460 case DH6OPT_AUTHPROTO_DELAYED:
461 printf(" proto: delayed");
463 case DH6OPT_AUTHPROTO_RECONFIG:
464 printf(" proto: reconfigure");
467 printf(" proto: %d", auth_proto);
472 case DH6OPT_AUTHALG_HMACMD5:
473 /* XXX: may depend on the protocol */
474 printf(", alg: HMAC-MD5");
477 printf(", alg: %d", *tp);
482 case DH6OPT_AUTHRDM_MONOCOUNTER:
483 printf(", RDM: mono");
486 printf(", RDM: %d", *tp);
491 for (i = 0; i < 4; i++, tp += 2)
492 printf(" %04x", EXTRACT_16BITS(tp));
494 /* protocol dependent part */
495 authinfolen = optlen - 11;
496 switch (auth_proto) {
497 case DH6OPT_AUTHPROTO_DELAYED:
498 if (authinfolen == 0)
500 if (authinfolen < 20) {
504 authrealmlen = authinfolen - 20;
505 if (authrealmlen > 0) {
508 for (i = 0; i < authrealmlen; i++, tp++)
510 printf(", key ID: %08x", EXTRACT_32BITS(tp));
512 printf(", HMAC-MD5:");
513 for (i = 0; i < 4; i++, tp+= 4)
514 printf(" %08x", EXTRACT_32BITS(tp));
516 case DH6OPT_AUTHPROTO_RECONFIG:
517 if (authinfolen != 17) {
522 case DH6OPT_AUTHRECONFIG_KEY:
523 printf(" reconfig-key");
525 case DH6OPT_AUTHRECONFIG_HMACMD5:
526 printf(" type: HMAC-MD5");
533 for (i = 0; i < 4; i++, tp+= 4)
534 printf(" %08x", EXTRACT_32BITS(tp));
543 case DH6OPT_RAPID_COMMIT: /* nothing todo */
546 case DH6OPT_INTERFACE_ID:
547 case DH6OPT_SUBSCRIBER_ID:
549 * Since we cannot predict the encoding, print hex dump
550 * at most 10 characters.
552 tp = (u_char *)(dh6o + 1);
554 for (i = 0; i < optlen && i < 10; i++)
555 printf("%02x", tp[i]);
558 case DH6OPT_RECONF_MSG:
559 tp = (u_char *)(dh6o + 1);
562 printf(" for renew)");
565 printf(" for inf-req)");
568 printf(" for ?\?\?(%02x))", *tp);
572 case DH6OPT_RECONF_ACCEPT: /* nothing todo */
575 case DH6OPT_SIP_SERVER_A:
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:
587 tp = (u_char *)(dh6o + 1);
588 for (i = 0; i < optlen; i += 16)
589 printf(" %s", ip6addr_string(&tp[i]));
592 case DH6OPT_STATUS_CODE:
597 tp = (u_char *)(dh6o + 1);
598 printf(" %s)", dhcp6stcode(EXTRACT_16BITS(&tp[0])));
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]));
612 /* there are sub-options */
613 dhcp6opt_print(tp + 12, tp + 12 + optlen);
622 tp = (u_char *)(dh6o + 1);
623 printf(" IAID:%u", EXTRACT_32BITS(tp));
625 /* there are sub-options */
626 dhcp6opt_print(tp + 4, tp + 4 + optlen);
630 case DH6OPT_IA_PD_PREFIX:
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]));
641 /* there are sub-options */
642 dhcp6opt_print(tp + 25, tp + 25 + optlen);
646 case DH6OPT_LIFETIME:
647 case DH6OPT_CLT_TIME:
652 tp = (u_char *)(dh6o + 1);
653 printf(" %d)", EXTRACT_32BITS(tp));
655 case DH6OPT_REMOTE_ID:
660 tp = (u_char *)(dh6o + 1);
661 printf(" %d ", EXTRACT_32BITS(tp));
663 * Print hex dump first 10 characters.
665 for (i = 4; i < optlen && i < 14; i++)
666 printf("%02x", tp[i]);
669 case DH6OPT_LQ_QUERY:
674 tp = (u_char *)(dh6o + 1);
677 printf(" by-address");
680 printf(" by-clientID");
683 printf(" type_%d", (int)*tp);
686 printf(" %s", ip6addr_string(&tp[1]));
688 /* there are query-options */
689 dhcp6opt_print(tp + 17, tp + optlen);
693 case DH6OPT_CLIENT_DATA:
694 tp = (u_char *)(dh6o + 1);
696 /* there are encapsulated options */
697 dhcp6opt_print(tp, tp + optlen);
701 case DH6OPT_LQ_RELAY_DATA:
706 tp = (u_char *)(dh6o + 1);
707 printf(" %s ", ip6addr_string(&tp[0]));
709 * Print hex dump first 10 characters.
711 for (i = 16; i < optlen && i < 26; i++)
712 printf("%02x", tp[i]);
720 cp += sizeof(*dh6o) + optlen;
725 printf("[|dhcp6ext]");
729 * Print dhcp6 packets
732 dhcp6_print(const u_char *cp, u_int length)
735 struct dhcp6_relay *dh6relay;
742 ep = (u_char *)snapend;
743 if (cp + length < ep)
746 dh6 = (struct dhcp6 *)cp;
747 dh6relay = (struct dhcp6_relay *)cp;
748 TCHECK(dh6->dh6_xid);
749 switch (dh6->dh6_msgtype) {
777 case DH6_RECONFIGURE:
778 name = "reconfigure";
786 case DH6_RELAY_REPLY:
793 name= "leasequery-reply";
803 else if (dh6->dh6_msgtype != DH6_RELAY_FORW &&
804 dh6->dh6_msgtype != DH6_RELAY_REPLY) {
805 printf(" msgtype-%u", dh6->dh6_msgtype);
810 /* XXX relay agent messages have to be handled differently */
813 printf(" %s (", name); /*)*/
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;
824 TCHECK(dh6relay->dh6relay_peeraddr);
826 memcpy(&addr6, dh6relay->dh6relay_linkaddr, sizeof (addr6));
827 printf("linkaddr=%s", ip6addr_string(&addr6));
829 memcpy(&addr6, dh6relay->dh6relay_peeraddr, sizeof (addr6));
830 printf(" peeraddr=%s", ip6addr_string(&addr6));
832 dhcp6opt_print((u_char *)(dh6relay + 1), ep);