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1 /*
2 * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 */
21
22 /* \summary: IPv6 Internet Control Message Protocol (ICMPv6) printer */
23
24 #ifdef HAVE_CONFIG_H
25 #include <config.h>
26 #endif
27
28 #include "netdissect-stdinc.h"
29
30 #include <stdio.h>
31 #include <string.h>
32
33 #include "netdissect.h"
34 #include "addrtoname.h"
35 #include "addrtostr.h"
36 #include "extract.h"
37
38 #include "ip6.h"
39 #include "ipproto.h"
40
41 #include "udp.h"
42 #include "ah.h"
43
44 /* NetBSD: icmp6.h,v 1.13 2000/08/03 16:30:37 itojun Exp */
45 /* $KAME: icmp6.h,v 1.22 2000/08/03 15:25:16 jinmei Exp $ */
46
47 /*
48 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
49 * All rights reserved.
50 *
51 * Redistribution and use in source and binary forms, with or without
52 * modification, are permitted provided that the following conditions
53 * are met:
54 * 1. Redistributions of source code must retain the above copyright
55 * notice, this list of conditions and the following disclaimer.
56 * 2. Redistributions in binary form must reproduce the above copyright
57 * notice, this list of conditions and the following disclaimer in the
58 * documentation and/or other materials provided with the distribution.
59 * 3. Neither the name of the project nor the names of its contributors
60 * may be used to endorse or promote products derived from this software
61 * without specific prior written permission.
62 *
63 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
64 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
65 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
66 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
67 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
68 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
69 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
70 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
71 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
72 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
73 * SUCH DAMAGE.
74 */
75
76 struct icmp6_hdr {
77 nd_uint8_t icmp6_type; /* type field */
78 nd_uint8_t icmp6_code; /* code field */
79 nd_uint16_t icmp6_cksum; /* checksum field */
80 union {
81 nd_uint32_t icmp6_un_data32[1]; /* type-specific field */
82 nd_uint16_t icmp6_un_data16[2]; /* type-specific field */
83 nd_uint8_t icmp6_un_data8[4]; /* type-specific field */
84 nd_byte icmp6_un_data[1]; /* type-specific field */
85 } icmp6_dataun;
86 };
87
88 #define icmp6_data32 icmp6_dataun.icmp6_un_data32
89 #define icmp6_data16 icmp6_dataun.icmp6_un_data16
90 #define icmp6_data8 icmp6_dataun.icmp6_un_data8
91 #define icmp6_data icmp6_dataun.icmp6_un_data
92 #define icmp6_pptr icmp6_data32[0] /* parameter prob */
93 #define icmp6_mtu icmp6_data32[0] /* packet too big */
94 #define icmp6_id icmp6_data16[0] /* echo request/reply */
95 #define icmp6_seq icmp6_data16[1] /* echo request/reply */
96 #define icmp6_maxdelay icmp6_data16[0] /* mcast group membership */
97
98 #define ICMP6_DST_UNREACH 1 /* dest unreachable, codes: */
99 #define ICMP6_PACKET_TOO_BIG 2 /* packet too big */
100 #define ICMP6_TIME_EXCEEDED 3 /* time exceeded, code: */
101 #define ICMP6_PARAM_PROB 4 /* ip6 header bad */
102
103 #define ICMP6_ECHO_REQUEST 128 /* echo service */
104 #define ICMP6_ECHO_REPLY 129 /* echo reply */
105 #define ICMP6_MEMBERSHIP_QUERY 130 /* group membership query */
106 #define MLD6_LISTENER_QUERY 130 /* multicast listener query */
107 #define ICMP6_MEMBERSHIP_REPORT 131 /* group membership report */
108 #define MLD6_LISTENER_REPORT 131 /* multicast listener report */
109 #define ICMP6_MEMBERSHIP_REDUCTION 132 /* group membership termination */
110 #define MLD6_LISTENER_DONE 132 /* multicast listener done */
111
112 #define ND_ROUTER_SOLICIT 133 /* router solicitation */
113 #define ND_ROUTER_ADVERT 134 /* router advertisement */
114 #define ND_NEIGHBOR_SOLICIT 135 /* neighbor solicitation */
115 #define ND_NEIGHBOR_ADVERT 136 /* neighbor advertisement */
116 #define ND_REDIRECT 137 /* redirect */
117
118 #define ICMP6_ROUTER_RENUMBERING 138 /* router renumbering */
119
120 #define ICMP6_WRUREQUEST 139 /* who are you request */
121 #define ICMP6_WRUREPLY 140 /* who are you reply */
122 #define ICMP6_FQDN_QUERY 139 /* FQDN query */
123 #define ICMP6_FQDN_REPLY 140 /* FQDN reply */
124 #define ICMP6_NI_QUERY 139 /* node information request - RFC 4620 */
125 #define ICMP6_NI_REPLY 140 /* node information reply - RFC 4620 */
126 #define IND_SOLICIT 141 /* inverse neighbor solicitation */
127 #define IND_ADVERT 142 /* inverse neighbor advertisement */
128
129 #define ICMP6_V2_MEMBERSHIP_REPORT 143 /* v2 membership report */
130 #define MLDV2_LISTENER_REPORT 143 /* v2 multicast listener report */
131 #define ICMP6_HADISCOV_REQUEST 144
132 #define ICMP6_HADISCOV_REPLY 145
133 #define ICMP6_MOBILEPREFIX_SOLICIT 146
134 #define ICMP6_MOBILEPREFIX_ADVERT 147
135
136 #define MLD6_MTRACE_RESP 200 /* mtrace response(to sender) */
137 #define MLD6_MTRACE 201 /* mtrace messages */
138
139 #define ICMP6_MAXTYPE 201
140
141 #define ICMP6_DST_UNREACH_NOROUTE 0 /* no route to destination */
142 #define ICMP6_DST_UNREACH_ADMIN 1 /* administratively prohibited */
143 #define ICMP6_DST_UNREACH_NOTNEIGHBOR 2 /* not a neighbor(obsolete) */
144 #define ICMP6_DST_UNREACH_BEYONDSCOPE 2 /* beyond scope of source address */
145 #define ICMP6_DST_UNREACH_ADDR 3 /* address unreachable */
146 #define ICMP6_DST_UNREACH_NOPORT 4 /* port unreachable */
147
148 #define ICMP6_TIME_EXCEED_TRANSIT 0 /* ttl==0 in transit */
149 #define ICMP6_TIME_EXCEED_REASSEMBLY 1 /* ttl==0 in reass */
150
151 #define ICMP6_PARAMPROB_HEADER 0 /* erroneous header field */
152 #define ICMP6_PARAMPROB_NEXTHEADER 1 /* unrecognized next header */
153 #define ICMP6_PARAMPROB_OPTION 2 /* unrecognized option */
154 #define ICMP6_PARAMPROB_FRAGHDRCHAIN 3 /* incomplete header chain */
155
156 #define ICMP6_INFOMSG_MASK 0x80 /* all informational messages */
157
158 #define ICMP6_NI_SUBJ_IPV6 0 /* Query Subject is an IPv6 address */
159 #define ICMP6_NI_SUBJ_FQDN 1 /* Query Subject is a Domain name */
160 #define ICMP6_NI_SUBJ_IPV4 2 /* Query Subject is an IPv4 address */
161
162 #define ICMP6_NI_SUCCESS 0 /* node information successful reply */
163 #define ICMP6_NI_REFUSED 1 /* node information request is refused */
164 #define ICMP6_NI_UNKNOWN 2 /* unknown Qtype */
165
166 #define ICMP6_ROUTER_RENUMBERING_COMMAND 0 /* rr command */
167 #define ICMP6_ROUTER_RENUMBERING_RESULT 1 /* rr result */
168 #define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET 255 /* rr seq num reset */
169
170 /* Used in kernel only */
171 #define ND_REDIRECT_ONLINK 0 /* redirect to an on-link node */
172 #define ND_REDIRECT_ROUTER 1 /* redirect to a better router */
173
174 /*
175 * Multicast Listener Discovery
176 */
177 struct mld6_hdr {
178 struct icmp6_hdr mld6_hdr;
179 nd_ipv6 mld6_addr; /* multicast address */
180 };
181
182 #define mld6_type mld6_hdr.icmp6_type
183 #define mld6_code mld6_hdr.icmp6_code
184 #define mld6_cksum mld6_hdr.icmp6_cksum
185 #define mld6_maxdelay mld6_hdr.icmp6_data16[0]
186 #define mld6_reserved mld6_hdr.icmp6_data16[1]
187
188 #define MLD_MINLEN 24
189 #define MLDV2_MINLEN 28
190
191 /*
192 * Neighbor Discovery
193 */
194
195 struct nd_router_solicit { /* router solicitation */
196 struct icmp6_hdr nd_rs_hdr;
197 /* could be followed by options */
198 };
199
200 #define nd_rs_type nd_rs_hdr.icmp6_type
201 #define nd_rs_code nd_rs_hdr.icmp6_code
202 #define nd_rs_cksum nd_rs_hdr.icmp6_cksum
203 #define nd_rs_reserved nd_rs_hdr.icmp6_data32[0]
204
205 struct nd_router_advert { /* router advertisement */
206 struct icmp6_hdr nd_ra_hdr;
207 nd_uint32_t nd_ra_reachable; /* reachable time */
208 nd_uint32_t nd_ra_retransmit; /* retransmit timer */
209 /* could be followed by options */
210 };
211
212 #define nd_ra_type nd_ra_hdr.icmp6_type
213 #define nd_ra_code nd_ra_hdr.icmp6_code
214 #define nd_ra_cksum nd_ra_hdr.icmp6_cksum
215 #define nd_ra_curhoplimit nd_ra_hdr.icmp6_data8[0]
216 #define nd_ra_flags_reserved nd_ra_hdr.icmp6_data8[1]
217 #define ND_RA_FLAG_MANAGED 0x80
218 #define ND_RA_FLAG_OTHER 0x40
219 #define ND_RA_FLAG_HOME_AGENT 0x20
220 #define ND_RA_FLAG_IPV6ONLY 0x02
221
222 /*
223 * Router preference values based on draft-draves-ipngwg-router-selection-01.
224 * These are non-standard definitions.
225 */
226 #define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */
227
228 #define ND_RA_FLAG_RTPREF_HIGH 0x08 /* 00001000 */
229 #define ND_RA_FLAG_RTPREF_MEDIUM 0x00 /* 00000000 */
230 #define ND_RA_FLAG_RTPREF_LOW 0x18 /* 00011000 */
231 #define ND_RA_FLAG_RTPREF_RSV 0x10 /* 00010000 */
232
233 #define nd_ra_router_lifetime nd_ra_hdr.icmp6_data16[1]
234
235 struct nd_neighbor_solicit { /* neighbor solicitation */
236 struct icmp6_hdr nd_ns_hdr;
237 nd_ipv6 nd_ns_target; /*target address */
238 /* could be followed by options */
239 };
240
241 #define nd_ns_type nd_ns_hdr.icmp6_type
242 #define nd_ns_code nd_ns_hdr.icmp6_code
243 #define nd_ns_cksum nd_ns_hdr.icmp6_cksum
244 #define nd_ns_reserved nd_ns_hdr.icmp6_data32[0]
245
246 struct nd_neighbor_advert { /* neighbor advertisement */
247 struct icmp6_hdr nd_na_hdr;
248 nd_ipv6 nd_na_target; /* target address */
249 /* could be followed by options */
250 };
251
252 #define nd_na_type nd_na_hdr.icmp6_type
253 #define nd_na_code nd_na_hdr.icmp6_code
254 #define nd_na_cksum nd_na_hdr.icmp6_cksum
255 #define nd_na_flags_reserved nd_na_hdr.icmp6_data32[0]
256
257 #define ND_NA_FLAG_ROUTER 0x80000000
258 #define ND_NA_FLAG_SOLICITED 0x40000000
259 #define ND_NA_FLAG_OVERRIDE 0x20000000
260
261 struct nd_redirect { /* redirect */
262 struct icmp6_hdr nd_rd_hdr;
263 nd_ipv6 nd_rd_target; /* target address */
264 nd_ipv6 nd_rd_dst; /* destination address */
265 /* could be followed by options */
266 };
267
268 #define nd_rd_type nd_rd_hdr.icmp6_type
269 #define nd_rd_code nd_rd_hdr.icmp6_code
270 #define nd_rd_cksum nd_rd_hdr.icmp6_cksum
271 #define nd_rd_reserved nd_rd_hdr.icmp6_data32[0]
272
273 struct nd_opt_hdr { /* Neighbor discovery option header */
274 nd_uint8_t nd_opt_type;
275 nd_uint8_t nd_opt_len;
276 /* followed by option specific data*/
277 };
278
279 #define ND_OPT_SOURCE_LINKADDR 1
280 #define ND_OPT_TARGET_LINKADDR 2
281 #define ND_OPT_PREFIX_INFORMATION 3
282 #define ND_OPT_REDIRECTED_HEADER 4
283 #define ND_OPT_MTU 5
284 #define ND_OPT_ADVINTERVAL 7
285 #define ND_OPT_HOMEAGENT_INFO 8
286 #define ND_OPT_ROUTE_INFO 24 /* RFC4191 */
287 #define ND_OPT_RDNSS 25
288 #define ND_OPT_DNSSL 31
289
290 struct nd_opt_prefix_info { /* prefix information */
291 nd_uint8_t nd_opt_pi_type;
292 nd_uint8_t nd_opt_pi_len;
293 nd_uint8_t nd_opt_pi_prefix_len;
294 nd_uint8_t nd_opt_pi_flags_reserved;
295 nd_uint32_t nd_opt_pi_valid_time;
296 nd_uint32_t nd_opt_pi_preferred_time;
297 nd_uint32_t nd_opt_pi_reserved2;
298 nd_ipv6 nd_opt_pi_prefix;
299 };
300
301 #define ND_OPT_PI_FLAG_ONLINK 0x80
302 #define ND_OPT_PI_FLAG_AUTO 0x40
303 #define ND_OPT_PI_FLAG_ROUTER 0x20 /*2292bis*/
304
305 struct nd_opt_rd_hdr { /* redirected header */
306 nd_uint8_t nd_opt_rh_type;
307 nd_uint8_t nd_opt_rh_len;
308 nd_uint16_t nd_opt_rh_reserved1;
309 nd_uint32_t nd_opt_rh_reserved2;
310 /* followed by IP header and data */
311 };
312
313 struct nd_opt_mtu { /* MTU option */
314 nd_uint8_t nd_opt_mtu_type;
315 nd_uint8_t nd_opt_mtu_len;
316 nd_uint16_t nd_opt_mtu_reserved;
317 nd_uint32_t nd_opt_mtu_mtu;
318 };
319
320 struct nd_opt_rdnss { /* RDNSS RFC 6106 5.1 */
321 nd_uint8_t nd_opt_rdnss_type;
322 nd_uint8_t nd_opt_rdnss_len;
323 nd_uint16_t nd_opt_rdnss_reserved;
324 nd_uint32_t nd_opt_rdnss_lifetime;
325 nd_ipv6 nd_opt_rdnss_addr[1]; /* variable-length */
326 };
327
328 struct nd_opt_dnssl { /* DNSSL RFC 6106 5.2 */
329 nd_uint8_t nd_opt_dnssl_type;
330 nd_uint8_t nd_opt_dnssl_len;
331 nd_uint16_t nd_opt_dnssl_reserved;
332 nd_uint32_t nd_opt_dnssl_lifetime;
333 /* followed by list of DNS search domains, variable-length */
334 };
335
336 struct nd_opt_advinterval { /* Advertisement interval option */
337 nd_uint8_t nd_opt_adv_type;
338 nd_uint8_t nd_opt_adv_len;
339 nd_uint16_t nd_opt_adv_reserved;
340 nd_uint32_t nd_opt_adv_interval;
341 };
342
343 struct nd_opt_homeagent_info { /* Home Agent info */
344 nd_uint8_t nd_opt_hai_type;
345 nd_uint8_t nd_opt_hai_len;
346 nd_uint16_t nd_opt_hai_reserved;
347 nd_uint16_t nd_opt_hai_preference;
348 nd_uint16_t nd_opt_hai_lifetime;
349 };
350
351 struct nd_opt_route_info { /* route info */
352 nd_uint8_t nd_opt_rti_type;
353 nd_uint8_t nd_opt_rti_len;
354 nd_uint8_t nd_opt_rti_prefixlen;
355 nd_uint8_t nd_opt_rti_flags;
356 nd_uint32_t nd_opt_rti_lifetime;
357 /* prefix follows */
358 };
359
360 /*
361 * icmp6 namelookup
362 */
363
364 struct icmp6_namelookup {
365 struct icmp6_hdr icmp6_nl_hdr;
366 nd_byte icmp6_nl_nonce[8];
367 nd_int32_t icmp6_nl_ttl;
368 #if 0
369 nd_uint8_t icmp6_nl_len;
370 nd_byte icmp6_nl_name[3];
371 #endif
372 /* could be followed by options */
373 };
374
375 /*
376 * icmp6 node information
377 */
378 struct icmp6_nodeinfo {
379 struct icmp6_hdr icmp6_ni_hdr;
380 nd_byte icmp6_ni_nonce[8];
381 /* could be followed by reply data */
382 };
383
384 #define ni_type icmp6_ni_hdr.icmp6_type
385 #define ni_code icmp6_ni_hdr.icmp6_code
386 #define ni_cksum icmp6_ni_hdr.icmp6_cksum
387 #define ni_qtype icmp6_ni_hdr.icmp6_data16[0]
388 #define ni_flags icmp6_ni_hdr.icmp6_data16[1]
389
390 #define NI_QTYPE_NOOP 0 /* NOOP */
391 #define NI_QTYPE_SUPTYPES 1 /* Supported Qtypes (drafts up to 09) */
392 #define NI_QTYPE_FQDN 2 /* FQDN (draft 04) */
393 #define NI_QTYPE_DNSNAME 2 /* DNS Name */
394 #define NI_QTYPE_NODEADDR 3 /* Node Addresses */
395 #define NI_QTYPE_IPV4ADDR 4 /* IPv4 Addresses */
396
397 #define NI_NODEADDR_FLAG_TRUNCATE 0x0001
398 #define NI_NODEADDR_FLAG_ALL 0x0002
399 #define NI_NODEADDR_FLAG_COMPAT 0x0004
400 #define NI_NODEADDR_FLAG_LINKLOCAL 0x0008
401 #define NI_NODEADDR_FLAG_SITELOCAL 0x0010
402 #define NI_NODEADDR_FLAG_GLOBAL 0x0020
403 #define NI_NODEADDR_FLAG_ANYCAST 0x0040 /* just experimental. not in spec */
404
405 struct ni_reply_fqdn {
406 nd_uint32_t ni_fqdn_ttl; /* TTL */
407 nd_uint8_t ni_fqdn_namelen; /* length in octets of the FQDN */
408 nd_byte ni_fqdn_name[3]; /* XXX: alignment */
409 };
410
411 /*
412 * Router Renumbering. as router-renum-08.txt
413 */
414 struct icmp6_router_renum { /* router renumbering header */
415 struct icmp6_hdr rr_hdr;
416 nd_uint8_t rr_segnum;
417 nd_uint8_t rr_flags;
418 nd_uint16_t rr_maxdelay;
419 nd_uint32_t rr_reserved;
420 };
421 #define ICMP6_RR_FLAGS_TEST 0x80
422 #define ICMP6_RR_FLAGS_REQRESULT 0x40
423 #define ICMP6_RR_FLAGS_FORCEAPPLY 0x20
424 #define ICMP6_RR_FLAGS_SPECSITE 0x10
425 #define ICMP6_RR_FLAGS_PREVDONE 0x08
426
427 #define rr_type rr_hdr.icmp6_type
428 #define rr_code rr_hdr.icmp6_code
429 #define rr_cksum rr_hdr.icmp6_cksum
430 #define rr_seqnum rr_hdr.icmp6_data32[0]
431
432 struct rr_pco_match { /* match prefix part */
433 nd_uint8_t rpm_code;
434 nd_uint8_t rpm_len;
435 nd_uint8_t rpm_ordinal;
436 nd_uint8_t rpm_matchlen;
437 nd_uint8_t rpm_minlen;
438 nd_uint8_t rpm_maxlen;
439 nd_uint16_t rpm_reserved;
440 nd_ipv6 rpm_prefix;
441 };
442
443 #define RPM_PCO_ADD 1
444 #define RPM_PCO_CHANGE 2
445 #define RPM_PCO_SETGLOBAL 3
446 #define RPM_PCO_MAX 4
447
448 struct rr_pco_use { /* use prefix part */
449 nd_uint8_t rpu_uselen;
450 nd_uint8_t rpu_keeplen;
451 nd_uint8_t rpu_ramask;
452 nd_uint8_t rpu_raflags;
453 nd_uint32_t rpu_vltime;
454 nd_uint32_t rpu_pltime;
455 nd_uint32_t rpu_flags;
456 nd_ipv6 rpu_prefix;
457 };
458 #define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK 0x80
459 #define ICMP6_RR_PCOUSE_RAFLAGS_AUTO 0x40
460
461 /* network endian */
462 #define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME ((uint32_t)htonl(0x80000000))
463 #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME ((uint32_t)htonl(0x40000000))
464
465 struct rr_result { /* router renumbering result message */
466 nd_uint16_t rrr_flags;
467 nd_uint8_t rrr_ordinal;
468 nd_uint8_t rrr_matchedlen;
469 nd_uint32_t rrr_ifid;
470 nd_ipv6 rrr_prefix;
471 };
472 /* network endian */
473 #define ICMP6_RR_RESULT_FLAGS_OOB ((uint16_t)htons(0x0002))
474 #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN ((uint16_t)htons(0x0001))
475
476 static const char *get_rtpref(u_int);
477 static const char *get_lifetime(uint32_t);
478 static void print_lladdr(netdissect_options *ndo, const u_char *, size_t);
479 static int icmp6_opt_print(netdissect_options *ndo, const u_char *, int);
480 static void mld6_print(netdissect_options *ndo, const u_char *);
481 static void mldv2_report_print(netdissect_options *ndo, const u_char *, u_int);
482 static void mldv2_query_print(netdissect_options *ndo, const u_char *, u_int);
483 static const struct udphdr *get_upperlayer(netdissect_options *ndo, const u_char *, u_int *);
484 static void dnsname_print(netdissect_options *ndo, const u_char *, const u_char *);
485 static void icmp6_nodeinfo_print(netdissect_options *ndo, u_int, const u_char *, const u_char *);
486 static void icmp6_rrenum_print(netdissect_options *ndo, const u_char *, const u_char *);
487
488 /*
489 * DIO: Updated to RFC6550, as published in 2012: section 6. (page 30)
490 */
491
492 #define ND_RPL_MESSAGE 155 /* 0x9B */
493
494 enum ND_RPL_CODE {
495 ND_RPL_DAG_IS=0x00,
496 ND_RPL_DAG_IO=0x01,
497 ND_RPL_DAO =0x02,
498 ND_RPL_DAO_ACK=0x03,
499 ND_RPL_SEC_DAG_IS = 0x80,
500 ND_RPL_SEC_DAG_IO = 0x81,
501 ND_RPL_SEC_DAG = 0x82,
502 ND_RPL_SEC_DAG_ACK= 0x83,
503 ND_RPL_SEC_CONSIST= 0x8A
504 };
505
506 enum ND_RPL_DIO_FLAGS {
507 ND_RPL_DIO_GROUNDED = 0x80,
508 ND_RPL_DIO_DATRIG = 0x40,
509 ND_RPL_DIO_DASUPPORT= 0x20,
510 ND_RPL_DIO_RES4 = 0x10,
511 ND_RPL_DIO_RES3 = 0x08,
512 ND_RPL_DIO_PRF_MASK = 0x07 /* 3-bit preference */
513 };
514
515 #define DAGID_LEN 16
516
517 /* section 6 of draft-ietf-roll-rpl-19 */
518 struct nd_rpl_security {
519 nd_uint8_t rpl_sec_t_reserved; /* bit 7 is T-bit */
520 nd_uint8_t rpl_sec_algo;
521 nd_uint16_t rpl_sec_kim_lvl_flags; /* bit 15/14, KIM */
522 /* bit 10-8, LVL, bit 7-0 flags */
523 nd_uint32_t rpl_sec_counter;
524 #if 0
525 nd_byte rpl_sec_ki[0]; /* depends upon kim */
526 #endif
527 };
528
529 /* section 6.2.1, DODAG Information Solication (DIS_IS) */
530 struct nd_rpl_dis_is {
531 nd_uint8_t rpl_dis_flags;
532 nd_uint8_t rpl_dis_reserved;
533 #if 0
534 nd_byte rpl_dis_options[0];
535 #endif
536 };
537
538 /* section 6.3.1, DODAG Information Object (DIO) */
539 struct nd_rpl_dio {
540 nd_uint8_t rpl_instanceid;
541 nd_uint8_t rpl_version;
542 nd_uint16_t rpl_dagrank;
543 nd_uint8_t rpl_mopprf; /* bit 7=G, 5-3=MOP, 2-0=PRF */
544 nd_uint8_t rpl_dtsn; /* Dest. Advertisement Trigger Sequence Number */
545 nd_uint8_t rpl_flags; /* no flags defined yet */
546 nd_uint8_t rpl_resv1;
547 nd_byte rpl_dagid[DAGID_LEN];
548 };
549 #define RPL_DIO_GROUND_FLAG 0x80
550 #define RPL_DIO_MOP_SHIFT 3
551 #define RPL_DIO_MOP_MASK (7 << RPL_DIO_MOP_SHIFT)
552 #define RPL_DIO_PRF_SHIFT 0
553 #define RPL_DIO_PRF_MASK (7 << RPL_DIO_PRF_SHIFT)
554 #define RPL_DIO_GROUNDED(X) ((X)&RPL_DIO_GROUND_FLAG)
555 #define RPL_DIO_MOP(X) (enum RPL_DIO_MOP)(((X)&RPL_DIO_MOP_MASK) >> RPL_DIO_MOP_SHIFT)
556 #define RPL_DIO_PRF(X) (((X)&RPL_DIO_PRF_MASK) >> RPL_DIO_PRF_SHIFT)
557
558 enum RPL_DIO_MOP {
559 RPL_DIO_NONSTORING= 0x0,
560 RPL_DIO_STORING = 0x1,
561 RPL_DIO_NONSTORING_MULTICAST = 0x2,
562 RPL_DIO_STORING_MULTICAST = 0x3
563 };
564
565 enum RPL_SUBOPT {
566 RPL_OPT_PAD1 = 0,
567 RPL_OPT_PADN = 1,
568 RPL_DIO_METRICS = 2,
569 RPL_DIO_ROUTINGINFO = 3,
570 RPL_DIO_CONFIG = 4,
571 RPL_DAO_RPLTARGET = 5,
572 RPL_DAO_TRANSITINFO = 6,
573 RPL_DIO_DESTPREFIX = 8,
574 RPL_DAO_RPLTARGET_DESC=9
575 };
576
577 struct rpl_genoption {
578 nd_uint8_t rpl_dio_type;
579 nd_uint8_t rpl_dio_len; /* suboption length, not including type/len */
580 };
581 #define RPL_GENOPTION_LEN 2
582
583 #define RPL_DIO_LIFETIME_INFINITE 0xffffffff
584 #define RPL_DIO_LIFETIME_DISCONNECT 0
585
586 struct rpl_dio_destprefix {
587 nd_uint8_t rpl_dio_type;
588 nd_uint8_t rpl_dio_len;
589 nd_uint8_t rpl_dio_prefixlen; /* in bits */
590 nd_uint8_t rpl_dio_prf; /* flags, including Route Preference */
591 nd_uint32_t rpl_dio_prefixlifetime; /* in seconds */
592 #if 0
593 nd_byte rpl_dio_prefix[0]; /* variable number of bytes */
594 #endif
595 };
596
597 /* section 6.4.1, DODAG Information Object (DIO) */
598 struct nd_rpl_dao {
599 nd_uint8_t rpl_instanceid;
600 nd_uint8_t rpl_flags; /* bit 7=K, 6=D */
601 nd_uint8_t rpl_resv;
602 nd_uint8_t rpl_daoseq;
603 nd_byte rpl_dagid[DAGID_LEN]; /* present when D set. */
604 };
605 #define ND_RPL_DAO_MIN_LEN 4 /* length without DAGID */
606
607 /* indicates if this DAO is to be acK'ed */
608 #define RPL_DAO_K_SHIFT 7
609 #define RPL_DAO_K_MASK (1 << RPL_DAO_K_SHIFT)
610 #define RPL_DAO_K(X) (((X)&RPL_DAO_K_MASK) >> RPL_DAO_K_SHIFT)
611
612 /* indicates if the DAGID is present */
613 #define RPL_DAO_D_SHIFT 6
614 #define RPL_DAO_D_MASK (1 << RPL_DAO_D_SHIFT)
615 #define RPL_DAO_D(X) (((X)&RPL_DAO_D_MASK) >> RPL_DAO_D_SHIFT)
616
617 struct rpl_dao_target {
618 nd_uint8_t rpl_dao_type;
619 nd_uint8_t rpl_dao_len;
620 nd_uint8_t rpl_dao_flags; /* unused */
621 nd_uint8_t rpl_dao_prefixlen; /* in bits */
622 #if 0
623 nd_byte rpl_dao_prefix[0]; /* variable number of bytes */
624 #endif
625 };
626
627 /* section 6.5.1, Destination Advertisement Object Acknowledgement (DAO-ACK) */
628 struct nd_rpl_daoack {
629 nd_uint8_t rpl_instanceid;
630 nd_uint8_t rpl_flags; /* bit 7=D */
631 nd_uint8_t rpl_daoseq;
632 nd_uint8_t rpl_status;
633 nd_byte rpl_dagid[DAGID_LEN]; /* present when D set. */
634 };
635 #define ND_RPL_DAOACK_MIN_LEN 4 /* length without DAGID */
636 /* indicates if the DAGID is present */
637 #define RPL_DAOACK_D_SHIFT 7
638 #define RPL_DAOACK_D_MASK (1 << RPL_DAOACK_D_SHIFT)
639 #define RPL_DAOACK_D(X) (((X)&RPL_DAOACK_D_MASK) >> RPL_DAOACK_D_SHIFT)
640
641 static const struct tok icmp6_type_values[] = {
642 { ICMP6_DST_UNREACH, "destination unreachable"},
643 { ICMP6_PACKET_TOO_BIG, "packet too big"},
644 { ICMP6_TIME_EXCEEDED, "time exceeded in-transit"},
645 { ICMP6_PARAM_PROB, "parameter problem"},
646 { ICMP6_ECHO_REQUEST, "echo request"},
647 { ICMP6_ECHO_REPLY, "echo reply"},
648 { MLD6_LISTENER_QUERY, "multicast listener query"},
649 { MLD6_LISTENER_REPORT, "multicast listener report"},
650 { MLD6_LISTENER_DONE, "multicast listener done"},
651 { ND_ROUTER_SOLICIT, "router solicitation"},
652 { ND_ROUTER_ADVERT, "router advertisement"},
653 { ND_NEIGHBOR_SOLICIT, "neighbor solicitation"},
654 { ND_NEIGHBOR_ADVERT, "neighbor advertisement"},
655 { ND_REDIRECT, "redirect"},
656 { ICMP6_ROUTER_RENUMBERING, "router renumbering"},
657 { IND_SOLICIT, "inverse neighbor solicitation"},
658 { IND_ADVERT, "inverse neighbor advertisement"},
659 { MLDV2_LISTENER_REPORT, "multicast listener report v2"},
660 { ICMP6_HADISCOV_REQUEST, "ha discovery request"},
661 { ICMP6_HADISCOV_REPLY, "ha discovery reply"},
662 { ICMP6_MOBILEPREFIX_SOLICIT, "mobile router solicitation"},
663 { ICMP6_MOBILEPREFIX_ADVERT, "mobile router advertisement"},
664 { ICMP6_WRUREQUEST, "who-are-you request"},
665 { ICMP6_WRUREPLY, "who-are-you reply"},
666 { ICMP6_NI_QUERY, "node information query"},
667 { ICMP6_NI_REPLY, "node information reply"},
668 { MLD6_MTRACE, "mtrace message"},
669 { MLD6_MTRACE_RESP, "mtrace response"},
670 { ND_RPL_MESSAGE, "RPL"},
671 { 0, NULL }
672 };
673
674 static const struct tok icmp6_dst_unreach_code_values[] = {
675 { ICMP6_DST_UNREACH_NOROUTE, "unreachable route" },
676 { ICMP6_DST_UNREACH_ADMIN, " unreachable prohibited"},
677 { ICMP6_DST_UNREACH_BEYONDSCOPE, "beyond scope"},
678 { ICMP6_DST_UNREACH_ADDR, "unreachable address"},
679 { ICMP6_DST_UNREACH_NOPORT, "unreachable port"},
680 { 0, NULL }
681 };
682
683 static const struct tok icmp6_opt_pi_flag_values[] = {
684 { ND_OPT_PI_FLAG_ONLINK, "onlink" },
685 { ND_OPT_PI_FLAG_AUTO, "auto" },
686 { ND_OPT_PI_FLAG_ROUTER, "router" },
687 { 0, NULL }
688 };
689
690 static const struct tok icmp6_opt_ra_flag_values[] = {
691 { ND_RA_FLAG_MANAGED, "managed" },
692 { ND_RA_FLAG_OTHER, "other stateful"},
693 { ND_RA_FLAG_HOME_AGENT, "home agent"},
694 { ND_RA_FLAG_IPV6ONLY, "ipv6 only"},
695 { 0, NULL }
696 };
697
698 static const struct tok icmp6_nd_na_flag_values[] = {
699 { ND_NA_FLAG_ROUTER, "router" },
700 { ND_NA_FLAG_SOLICITED, "solicited" },
701 { ND_NA_FLAG_OVERRIDE, "override" },
702 { 0, NULL }
703 };
704
705 static const struct tok icmp6_opt_values[] = {
706 { ND_OPT_SOURCE_LINKADDR, "source link-address"},
707 { ND_OPT_TARGET_LINKADDR, "destination link-address"},
708 { ND_OPT_PREFIX_INFORMATION, "prefix info"},
709 { ND_OPT_REDIRECTED_HEADER, "redirected header"},
710 { ND_OPT_MTU, "mtu"},
711 { ND_OPT_RDNSS, "rdnss"},
712 { ND_OPT_DNSSL, "dnssl"},
713 { ND_OPT_ADVINTERVAL, "advertisement interval"},
714 { ND_OPT_HOMEAGENT_INFO, "homeagent information"},
715 { ND_OPT_ROUTE_INFO, "route info"},
716 { 0, NULL }
717 };
718
719 /* mldv2 report types */
720 static const struct tok mldv2report2str[] = {
721 { 1, "is_in" },
722 { 2, "is_ex" },
723 { 3, "to_in" },
724 { 4, "to_ex" },
725 { 5, "allow" },
726 { 6, "block" },
727 { 0, NULL }
728 };
729
730 static const char *
731 get_rtpref(u_int v)
732 {
733 static const char *rtpref_str[] = {
734 "medium", /* 00 */
735 "high", /* 01 */
736 "rsv", /* 10 */
737 "low" /* 11 */
738 };
739
740 return rtpref_str[((v & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff];
741 }
742
743 static const char *
744 get_lifetime(uint32_t v)
745 {
746 static char buf[20];
747
748 if (v == (uint32_t)~0UL)
749 return "infinity";
750 else {
751 snprintf(buf, sizeof(buf), "%us", v);
752 return buf;
753 }
754 }
755
756 static void
757 print_lladdr(netdissect_options *ndo, const uint8_t *p, size_t l)
758 {
759 const uint8_t *ep, *q;
760
761 q = p;
762 ep = p + l;
763 while (l > 0 && q < ep) {
764 if (q > p)
765 ND_PRINT(":");
766 ND_PRINT("%02x", GET_U_1(q));
767 q++;
768 l--;
769 }
770 }
771
772 static uint16_t icmp6_cksum(netdissect_options *ndo, const struct ip6_hdr *ip6,
773 const struct icmp6_hdr *icp, u_int len)
774 {
775 return nextproto6_cksum(ndo, ip6, (const uint8_t *)(const void *)icp, len, len,
776 IPPROTO_ICMPV6);
777 }
778
779 static const struct tok rpl_mop_values[] = {
780 { RPL_DIO_NONSTORING, "nonstoring"},
781 { RPL_DIO_STORING, "storing"},
782 { RPL_DIO_NONSTORING_MULTICAST, "nonstoring-multicast"},
783 { RPL_DIO_STORING_MULTICAST, "storing-multicast"},
784 { 0, NULL},
785 };
786
787 static const struct tok rpl_subopt_values[] = {
788 { RPL_OPT_PAD1, "pad1"},
789 { RPL_OPT_PADN, "padN"},
790 { RPL_DIO_METRICS, "metrics"},
791 { RPL_DIO_ROUTINGINFO, "routinginfo"},
792 { RPL_DIO_CONFIG, "config"},
793 { RPL_DAO_RPLTARGET, "rpltarget"},
794 { RPL_DAO_TRANSITINFO, "transitinfo"},
795 { RPL_DIO_DESTPREFIX, "destprefix"},
796 { RPL_DAO_RPLTARGET_DESC, "rpltargetdesc"},
797 { 0, NULL},
798 };
799
800 static void
801 rpl_printopts(netdissect_options *ndo, const uint8_t *opts, u_int length)
802 {
803 const struct rpl_genoption *opt;
804 uint8_t dio_type;
805 u_int optlen;
806
807 while (length != 0) {
808 opt = (const struct rpl_genoption *)opts;
809 dio_type = GET_U_1(opt->rpl_dio_type);
810 if (dio_type == RPL_OPT_PAD1) {
811 optlen = 1;
812 ND_PRINT(" opt:pad1");
813 } else {
814 if (length < RPL_GENOPTION_LEN)
815 goto trunc;
816 optlen = GET_U_1(opt->rpl_dio_len)+RPL_GENOPTION_LEN;
817 ND_PRINT(" opt:%s len:%u ",
818 tok2str(rpl_subopt_values, "subopt:%u", dio_type),
819 optlen);
820 ND_TCHECK_LEN(opt, optlen);
821 if (length < optlen)
822 goto trunc;
823 if (ndo->ndo_vflag > 2) {
824 hex_print(ndo,
825 " ",
826 opts + RPL_GENOPTION_LEN, /* content of DIO option */
827 optlen - RPL_GENOPTION_LEN);
828 }
829 }
830 opts += optlen;
831 length -= optlen;
832 }
833 return;
834 trunc:
835 nd_print_trunc(ndo);
836 }
837
838 static void
839 rpl_dio_print(netdissect_options *ndo,
840 const u_char *bp, u_int length)
841 {
842 const struct nd_rpl_dio *dio = (const struct nd_rpl_dio *)bp;
843
844 ND_LCHECK_ZU(length, sizeof(struct nd_rpl_dio));
845 ND_PRINT(" [dagid:%s,seq:%u,instance:%u,rank:%u,%smop:%s,prf:%u]",
846 GET_IP6ADDR_STRING(dio->rpl_dagid),
847 GET_U_1(dio->rpl_dtsn),
848 GET_U_1(dio->rpl_instanceid),
849 GET_BE_U_2(dio->rpl_dagrank),
850 RPL_DIO_GROUNDED(GET_U_1(dio->rpl_mopprf)) ? "grounded,":"",
851 tok2str(rpl_mop_values, "mop%u",
852 RPL_DIO_MOP(GET_U_1(dio->rpl_mopprf))),
853 RPL_DIO_PRF(GET_U_1(dio->rpl_mopprf)));
854
855 if(ndo->ndo_vflag > 1) {
856 rpl_printopts(ndo, bp + sizeof(struct nd_rpl_dio),
857 length - sizeof(struct nd_rpl_dio));
858 }
859 return;
860 invalid:
861 nd_print_invalid(ndo);
862 }
863
864 static void
865 rpl_dao_print(netdissect_options *ndo,
866 const u_char *bp, u_int length)
867 {
868 const struct nd_rpl_dao *dao = (const struct nd_rpl_dao *)bp;
869 const char *dagid_str = "<elided>";
870 uint8_t rpl_flags;
871
872 ND_TCHECK_SIZE(dao);
873 if (length < ND_RPL_DAO_MIN_LEN)
874 goto tooshort;
875
876 bp += ND_RPL_DAO_MIN_LEN;
877 length -= ND_RPL_DAO_MIN_LEN;
878 rpl_flags = GET_U_1(dao->rpl_flags);
879 if(RPL_DAO_D(rpl_flags)) {
880 ND_TCHECK_LEN(dao->rpl_dagid, DAGID_LEN);
881 if (length < DAGID_LEN)
882 goto tooshort;
883 dagid_str = ip6addr_string (ndo, dao->rpl_dagid);
884 bp += DAGID_LEN;
885 length -= DAGID_LEN;
886 }
887
888 ND_PRINT(" [dagid:%s,seq:%u,instance:%u%s%s,flags:%02x]",
889 dagid_str,
890 GET_U_1(dao->rpl_daoseq),
891 GET_U_1(dao->rpl_instanceid),
892 RPL_DAO_K(rpl_flags) ? ",acK":"",
893 RPL_DAO_D(rpl_flags) ? ",Dagid":"",
894 rpl_flags);
895
896 if(ndo->ndo_vflag > 1) {
897 rpl_printopts(ndo, bp, length);
898 }
899 return;
900
901 trunc:
902 nd_print_trunc(ndo);
903 return;
904
905 tooshort:
906 ND_PRINT(" [|length too short]");
907 }
908
909 static void
910 rpl_daoack_print(netdissect_options *ndo,
911 const u_char *bp, u_int length)
912 {
913 const struct nd_rpl_daoack *daoack = (const struct nd_rpl_daoack *)bp;
914 const char *dagid_str = "<elided>";
915
916 ND_TCHECK_LEN(daoack, ND_RPL_DAOACK_MIN_LEN);
917 if (length < ND_RPL_DAOACK_MIN_LEN)
918 goto tooshort;
919
920 bp += ND_RPL_DAOACK_MIN_LEN;
921 length -= ND_RPL_DAOACK_MIN_LEN;
922 if(RPL_DAOACK_D(GET_U_1(daoack->rpl_flags))) {
923 ND_TCHECK_LEN(daoack->rpl_dagid, DAGID_LEN);
924 if (length < DAGID_LEN)
925 goto tooshort;
926 dagid_str = ip6addr_string (ndo, daoack->rpl_dagid);
927 bp += DAGID_LEN;
928 length -= DAGID_LEN;
929 }
930
931 ND_PRINT(" [dagid:%s,seq:%u,instance:%u,status:%u]",
932 dagid_str,
933 GET_U_1(daoack->rpl_daoseq),
934 GET_U_1(daoack->rpl_instanceid),
935 GET_U_1(daoack->rpl_status));
936
937 /* no officially defined options for DAOACK, but print any we find */
938 if(ndo->ndo_vflag > 1) {
939 rpl_printopts(ndo, bp, length);
940 }
941 return;
942
943 trunc:
944 nd_print_trunc(ndo);
945 return;
946
947 tooshort:
948 ND_PRINT(" [|dao-length too short]");
949 }
950
951 static void
952 rpl_print(netdissect_options *ndo,
953 uint8_t icmp6_code,
954 const u_char *bp, u_int length)
955 {
956 int secured = icmp6_code & 0x80;
957 int basecode= icmp6_code & 0x7f;
958
959 if(secured) {
960 ND_PRINT(", (SEC) [worktodo]");
961 /* XXX
962 * the next header pointer needs to move forward to
963 * skip the secure part.
964 */
965 return;
966 } else {
967 ND_PRINT(", (CLR)");
968 }
969
970 switch(basecode) {
971 case ND_RPL_DAG_IS:
972 ND_PRINT("DODAG Information Solicitation");
973 if(ndo->ndo_vflag) {
974 }
975 break;
976 case ND_RPL_DAG_IO:
977 ND_PRINT("DODAG Information Object");
978 if(ndo->ndo_vflag) {
979 rpl_dio_print(ndo, bp, length);
980 }
981 break;
982 case ND_RPL_DAO:
983 ND_PRINT("Destination Advertisement Object");
984 if(ndo->ndo_vflag) {
985 rpl_dao_print(ndo, bp, length);
986 }
987 break;
988 case ND_RPL_DAO_ACK:
989 ND_PRINT("Destination Advertisement Object Ack");
990 if(ndo->ndo_vflag) {
991 rpl_daoack_print(ndo, bp, length);
992 }
993 break;
994 default:
995 ND_PRINT("RPL message, unknown code %u",icmp6_code);
996 break;
997 }
998 return;
999
1000 #if 0
1001 trunc:
1002 nd_print_trunc(ndo);
1003 return;
1004 #endif
1005
1006 }
1007
1008 void
1009 icmp6_print(netdissect_options *ndo,
1010 const u_char *bp, u_int length, const u_char *bp2, int fragmented)
1011 {
1012 const struct icmp6_hdr *dp;
1013 uint8_t icmp6_type, icmp6_code;
1014 const struct ip6_hdr *ip;
1015 const struct ip6_hdr *oip;
1016 const struct udphdr *ouh;
1017 uint16_t dport;
1018 const u_char *ep;
1019 u_int prot;
1020
1021 ndo->ndo_protocol = "icmp6";
1022 dp = (const struct icmp6_hdr *)bp;
1023 ip = (const struct ip6_hdr *)bp2;
1024 oip = (const struct ip6_hdr *)(dp + 1);
1025 /* 'ep' points to the end of available data. */
1026 ep = ndo->ndo_snapend;
1027 if (length == 0) {
1028 ND_PRINT("ICMP6, length 0");
1029 nd_print_invalid(ndo);
1030 return;
1031 }
1032
1033 if (ndo->ndo_vflag && !fragmented) {
1034 uint16_t sum, udp_sum;
1035
1036 if (ND_TTEST_LEN(bp, length)) {
1037 udp_sum = GET_BE_U_2(dp->icmp6_cksum);
1038 sum = icmp6_cksum(ndo, ip, dp, length);
1039 if (sum != 0)
1040 ND_PRINT("[bad icmp6 cksum 0x%04x -> 0x%04x!] ",
1041 udp_sum,
1042 in_cksum_shouldbe(udp_sum, sum));
1043 else
1044 ND_PRINT("[icmp6 sum ok] ");
1045 }
1046 }
1047
1048 icmp6_type = GET_U_1(dp->icmp6_type);
1049 ND_PRINT("ICMP6, %s", tok2str(icmp6_type_values,"unknown icmp6 type (%u)",icmp6_type));
1050
1051 /* display cosmetics: print the packet length for printer that use the vflag now */
1052 if (ndo->ndo_vflag && (icmp6_type == ND_ROUTER_SOLICIT ||
1053 icmp6_type == ND_ROUTER_ADVERT ||
1054 icmp6_type == ND_NEIGHBOR_ADVERT ||
1055 icmp6_type == ND_NEIGHBOR_SOLICIT ||
1056 icmp6_type == ND_REDIRECT ||
1057 icmp6_type == ICMP6_HADISCOV_REPLY ||
1058 icmp6_type == ICMP6_MOBILEPREFIX_ADVERT ))
1059 ND_PRINT(", length %u", length);
1060
1061 icmp6_code = GET_U_1(dp->icmp6_code);
1062
1063 switch (icmp6_type) {
1064 case ICMP6_DST_UNREACH:
1065 ND_PRINT(", %s", tok2str(icmp6_dst_unreach_code_values,"unknown unreach code (%u)",icmp6_code));
1066 switch (icmp6_code) {
1067
1068 case ICMP6_DST_UNREACH_NOROUTE: /* fall through */
1069 case ICMP6_DST_UNREACH_ADMIN:
1070 case ICMP6_DST_UNREACH_ADDR:
1071 ND_PRINT(" %s",GET_IP6ADDR_STRING(oip->ip6_dst));
1072 break;
1073 case ICMP6_DST_UNREACH_BEYONDSCOPE:
1074 ND_PRINT(" %s, source address %s",
1075 GET_IP6ADDR_STRING(oip->ip6_dst),
1076 GET_IP6ADDR_STRING(oip->ip6_src));
1077 break;
1078 case ICMP6_DST_UNREACH_NOPORT:
1079 if ((ouh = get_upperlayer(ndo, (const u_char *)oip, &prot))
1080 == NULL)
1081 goto trunc;
1082
1083 dport = GET_BE_U_2(ouh->uh_dport);
1084 switch (prot) {
1085 case IPPROTO_TCP:
1086 ND_PRINT(", %s tcp port %s",
1087 GET_IP6ADDR_STRING(oip->ip6_dst),
1088 tcpport_string(ndo, dport));
1089 break;
1090 case IPPROTO_UDP:
1091 ND_PRINT(", %s udp port %s",
1092 GET_IP6ADDR_STRING(oip->ip6_dst),
1093 udpport_string(ndo, dport));
1094 break;
1095 default:
1096 ND_PRINT(", %s protocol %u port %u unreachable",
1097 GET_IP6ADDR_STRING(oip->ip6_dst),
1098 prot, dport);
1099 break;
1100 }
1101 break;
1102 default:
1103 if (ndo->ndo_vflag <= 1) {
1104 print_unknown_data(ndo, bp,"\n\t",length);
1105 return;
1106 }
1107 break;
1108 }
1109 break;
1110 case ICMP6_PACKET_TOO_BIG:
1111 ND_PRINT(", mtu %u", GET_BE_U_4(dp->icmp6_mtu));
1112 break;
1113 case ICMP6_TIME_EXCEEDED:
1114 switch (icmp6_code) {
1115 case ICMP6_TIME_EXCEED_TRANSIT:
1116 ND_PRINT(" for %s",
1117 GET_IP6ADDR_STRING(oip->ip6_dst));
1118 break;
1119 case ICMP6_TIME_EXCEED_REASSEMBLY:
1120 ND_PRINT(" (reassembly)");
1121 break;
1122 default:
1123 ND_PRINT(", unknown code (%u)", icmp6_code);
1124 break;
1125 }
1126 break;
1127 case ICMP6_PARAM_PROB:
1128 ND_TCHECK_16(oip->ip6_dst);
1129 switch (icmp6_code) {
1130 case ICMP6_PARAMPROB_HEADER:
1131 ND_PRINT(", erroneous - octet %u",
1132 GET_BE_U_4(dp->icmp6_pptr));
1133 break;
1134 case ICMP6_PARAMPROB_NEXTHEADER:
1135 ND_PRINT(", next header - octet %u",
1136 GET_BE_U_4(dp->icmp6_pptr));
1137 break;
1138 case ICMP6_PARAMPROB_OPTION:
1139 ND_PRINT(", option - octet %u",
1140 GET_BE_U_4(dp->icmp6_pptr));
1141 break;
1142 case ICMP6_PARAMPROB_FRAGHDRCHAIN:
1143 ND_PRINT(", incomplete header chain - octet %u",
1144 GET_BE_U_4(dp->icmp6_pptr));
1145 break;
1146 default:
1147 ND_PRINT(", code-#%u",
1148 icmp6_code);
1149 break;
1150 }
1151 break;
1152 case ICMP6_ECHO_REQUEST:
1153 case ICMP6_ECHO_REPLY:
1154 ND_PRINT(", id %u, seq %u", GET_BE_U_2(dp->icmp6_id),
1155 GET_BE_U_2(dp->icmp6_seq));
1156 break;
1157 case ICMP6_MEMBERSHIP_QUERY:
1158 if (length == MLD_MINLEN) {
1159 mld6_print(ndo, (const u_char *)dp);
1160 } else if (length >= MLDV2_MINLEN) {
1161 ND_PRINT(" v2");
1162 mldv2_query_print(ndo, (const u_char *)dp, length);
1163 } else {
1164 ND_PRINT(" unknown-version (len %u) ", length);
1165 }
1166 break;
1167 case ICMP6_MEMBERSHIP_REPORT:
1168 mld6_print(ndo, (const u_char *)dp);
1169 break;
1170 case ICMP6_MEMBERSHIP_REDUCTION:
1171 mld6_print(ndo, (const u_char *)dp);
1172 break;
1173 case ND_ROUTER_SOLICIT:
1174 #define RTSOLLEN 8
1175 if (ndo->ndo_vflag) {
1176 if (icmp6_opt_print(ndo, (const u_char *)dp + RTSOLLEN,
1177 length - RTSOLLEN) == -1)
1178 goto trunc;
1179 }
1180 break;
1181 case ND_ROUTER_ADVERT:
1182 #define RTADVLEN 16
1183 if (ndo->ndo_vflag) {
1184 const struct nd_router_advert *p;
1185
1186 p = (const struct nd_router_advert *)dp;
1187 ND_PRINT("\n\thop limit %u, Flags [%s]"
1188 ", pref %s, router lifetime %us, reachable time %ums, retrans timer %ums",
1189 GET_U_1(p->nd_ra_curhoplimit),
1190 bittok2str(icmp6_opt_ra_flag_values,"none",GET_U_1(p->nd_ra_flags_reserved)),
1191 get_rtpref(GET_U_1(p->nd_ra_flags_reserved)),
1192 GET_BE_U_2(p->nd_ra_router_lifetime),
1193 GET_BE_U_4(p->nd_ra_reachable),
1194 GET_BE_U_4(p->nd_ra_retransmit));
1195
1196 if (icmp6_opt_print(ndo, (const u_char *)dp + RTADVLEN,
1197 length - RTADVLEN) == -1)
1198 goto trunc;
1199 }
1200 break;
1201 case ND_NEIGHBOR_SOLICIT:
1202 {
1203 const struct nd_neighbor_solicit *p;
1204 p = (const struct nd_neighbor_solicit *)dp;
1205 ND_PRINT(", who has %s", GET_IP6ADDR_STRING(p->nd_ns_target));
1206 if (ndo->ndo_vflag) {
1207 #define NDSOLLEN 24
1208 if (icmp6_opt_print(ndo, (const u_char *)dp + NDSOLLEN,
1209 length - NDSOLLEN) == -1)
1210 goto trunc;
1211 }
1212 }
1213 break;
1214 case ND_NEIGHBOR_ADVERT:
1215 {
1216 const struct nd_neighbor_advert *p;
1217
1218 p = (const struct nd_neighbor_advert *)dp;
1219 ND_PRINT(", tgt is %s",
1220 GET_IP6ADDR_STRING(p->nd_na_target));
1221 if (ndo->ndo_vflag) {
1222 ND_PRINT(", Flags [%s]",
1223 bittok2str(icmp6_nd_na_flag_values,
1224 "none",
1225 GET_BE_U_4(p->nd_na_flags_reserved)));
1226 #define NDADVLEN 24
1227 if (icmp6_opt_print(ndo, (const u_char *)dp + NDADVLEN,
1228 length - NDADVLEN) == -1)
1229 goto trunc;
1230 #undef NDADVLEN
1231 }
1232 }
1233 break;
1234 case ND_REDIRECT:
1235 {
1236 const struct nd_redirect *p;
1237
1238 p = (const struct nd_redirect *)dp;
1239 ND_PRINT(", %s", GET_IP6ADDR_STRING(p->nd_rd_dst));
1240 ND_PRINT(" to %s", GET_IP6ADDR_STRING(p->nd_rd_target));
1241 #define REDIRECTLEN 40
1242 if (ndo->ndo_vflag) {
1243 if (icmp6_opt_print(ndo, (const u_char *)dp + REDIRECTLEN,
1244 length - REDIRECTLEN) == -1)
1245 goto trunc;
1246 #undef REDIRECTLEN
1247 }
1248 }
1249 break;
1250 case ICMP6_ROUTER_RENUMBERING:
1251 icmp6_rrenum_print(ndo, bp, ep);
1252 break;
1253 case ICMP6_NI_QUERY:
1254 case ICMP6_NI_REPLY:
1255 icmp6_nodeinfo_print(ndo, length, bp, ep);
1256 break;
1257 case IND_SOLICIT:
1258 case IND_ADVERT:
1259 break;
1260 case ICMP6_V2_MEMBERSHIP_REPORT:
1261 mldv2_report_print(ndo, (const u_char *) dp, length);
1262 break;
1263 case ICMP6_MOBILEPREFIX_SOLICIT: /* fall through */
1264 case ICMP6_HADISCOV_REQUEST:
1265 ND_PRINT(", id 0x%04x", GET_BE_U_2(dp->icmp6_data16[0]));
1266 break;
1267 case ICMP6_HADISCOV_REPLY:
1268 if (ndo->ndo_vflag) {
1269 const u_char *cp;
1270 const u_char *p;
1271
1272 ND_PRINT(", id 0x%04x",
1273 GET_BE_U_2(dp->icmp6_data16[0]));
1274 cp = (const u_char *)dp + length;
1275 p = (const u_char *)(dp + 1);
1276 while (p < cp) {
1277 ND_PRINT(", %s", GET_IP6ADDR_STRING(p));
1278 p += 16;
1279 }
1280 }
1281 break;
1282 case ICMP6_MOBILEPREFIX_ADVERT:
1283 if (ndo->ndo_vflag) {
1284 uint16_t flags;
1285
1286 ND_PRINT(", id 0x%04x",
1287 GET_BE_U_2(dp->icmp6_data16[0]));
1288 flags = GET_BE_U_2(dp->icmp6_data16[1]);
1289 if (flags & 0xc000)
1290 ND_PRINT(" ");
1291 if (flags & 0x8000)
1292 ND_PRINT("M");
1293 if (flags & 0x4000)
1294 ND_PRINT("O");
1295 #define MPADVLEN 8
1296 if (icmp6_opt_print(ndo, (const u_char *)dp + MPADVLEN,
1297 length - MPADVLEN) == -1)
1298 goto trunc;
1299 }
1300 break;
1301 case ND_RPL_MESSAGE:
1302 /* plus 4, because struct icmp6_hdr contains 4 bytes of icmp payload */
1303 rpl_print(ndo, icmp6_code, dp->icmp6_data, length-sizeof(struct icmp6_hdr)+4);
1304 break;
1305 default:
1306 ND_PRINT(", length %u", length);
1307 if (ndo->ndo_vflag <= 1)
1308 print_unknown_data(ndo, bp,"\n\t", length);
1309 return;
1310 }
1311 if (!ndo->ndo_vflag)
1312 ND_PRINT(", length %u", length);
1313 return;
1314 trunc:
1315 nd_print_trunc(ndo);
1316 }
1317
1318 static const struct udphdr *
1319 get_upperlayer(netdissect_options *ndo, const u_char *bp, u_int *prot)
1320 {
1321 const u_char *ep;
1322 const struct ip6_hdr *ip6 = (const struct ip6_hdr *)bp;
1323 const struct udphdr *uh;
1324 const struct ip6_hbh *hbh;
1325 const struct ip6_frag *fragh;
1326 const struct ah *ah;
1327 u_int nh;
1328 int hlen;
1329
1330 /* 'ep' points to the end of available data. */
1331 ep = ndo->ndo_snapend;
1332
1333 if (!ND_TTEST_1(ip6->ip6_nxt))
1334 return NULL;
1335
1336 nh = GET_U_1(ip6->ip6_nxt);
1337 hlen = sizeof(struct ip6_hdr);
1338
1339 while (bp < ep) {
1340 bp += hlen;
1341
1342 switch(nh) {
1343 case IPPROTO_UDP:
1344 case IPPROTO_TCP:
1345 uh = (const struct udphdr *)bp;
1346 if (ND_TTEST_2(uh->uh_dport)) {
1347 *prot = nh;
1348 return(uh);
1349 }
1350 else
1351 return(NULL);
1352 /* NOTREACHED */
1353
1354 case IPPROTO_HOPOPTS:
1355 case IPPROTO_DSTOPTS:
1356 case IPPROTO_ROUTING:
1357 hbh = (const struct ip6_hbh *)bp;
1358 if (!ND_TTEST_1(hbh->ip6h_len))
1359 return(NULL);
1360 nh = GET_U_1(hbh->ip6h_nxt);
1361 hlen = (GET_U_1(hbh->ip6h_len) + 1) << 3;
1362 break;
1363
1364 case IPPROTO_FRAGMENT: /* this should be odd, but try anyway */
1365 fragh = (const struct ip6_frag *)bp;
1366 if (!ND_TTEST_2(fragh->ip6f_offlg))
1367 return(NULL);
1368 /* fragments with non-zero offset are meaningless */
1369 if ((GET_BE_U_2(fragh->ip6f_offlg) & IP6F_OFF_MASK) != 0)
1370 return(NULL);
1371 nh = GET_U_1(fragh->ip6f_nxt);
1372 hlen = sizeof(struct ip6_frag);
1373 break;
1374
1375 case IPPROTO_AH:
1376 ah = (const struct ah *)bp;
1377 if (!ND_TTEST_1(ah->ah_len))
1378 return(NULL);
1379 nh = GET_U_1(ah->ah_nxt);
1380 hlen = (GET_U_1(ah->ah_len) + 2) << 2;
1381 break;
1382
1383 default: /* unknown or undecodable header */
1384 *prot = nh; /* meaningless, but set here anyway */
1385 return(NULL);
1386 }
1387 }
1388
1389 return(NULL); /* should be notreached, though */
1390 }
1391
1392 static int
1393 icmp6_opt_print(netdissect_options *ndo, const u_char *bp, int resid)
1394 {
1395 const struct nd_opt_hdr *op;
1396 uint8_t opt_type;
1397 u_int opt_len;
1398 const struct nd_opt_prefix_info *opp;
1399 const struct nd_opt_mtu *opm;
1400 const struct nd_opt_rdnss *oprd;
1401 const struct nd_opt_dnssl *opds;
1402 const struct nd_opt_advinterval *opa;
1403 const struct nd_opt_homeagent_info *oph;
1404 const struct nd_opt_route_info *opri;
1405 const u_char *cp, *ep, *domp;
1406 nd_ipv6 in6;
1407 size_t l;
1408 u_int i;
1409
1410 cp = bp;
1411 /* 'ep' points to the end of available data. */
1412 ep = ndo->ndo_snapend;
1413
1414 while (cp < ep) {
1415 op = (const struct nd_opt_hdr *)cp;
1416
1417 ND_TCHECK_1(op->nd_opt_len);
1418 if (resid <= 0)
1419 return 0;
1420 opt_type = GET_U_1(op->nd_opt_type);
1421 opt_len = GET_U_1(op->nd_opt_len);
1422 if (opt_len == 0)
1423 goto trunc;
1424 if (cp + (opt_len << 3) > ep)
1425 goto trunc;
1426
1427 ND_PRINT("\n\t %s option (%u), length %u (%u): ",
1428 tok2str(icmp6_opt_values, "unknown", opt_type),
1429 opt_type,
1430 opt_len << 3,
1431 opt_len);
1432
1433 switch (opt_type) {
1434 case ND_OPT_SOURCE_LINKADDR:
1435 l = (opt_len << 3) - 2;
1436 print_lladdr(ndo, cp + 2, l);
1437 break;
1438 case ND_OPT_TARGET_LINKADDR:
1439 l = (opt_len << 3) - 2;
1440 print_lladdr(ndo, cp + 2, l);
1441 break;
1442 case ND_OPT_PREFIX_INFORMATION:
1443 opp = (const struct nd_opt_prefix_info *)op;
1444 ND_PRINT("%s/%u%s, Flags [%s], valid time %s",
1445 GET_IP6ADDR_STRING(opp->nd_opt_pi_prefix),
1446 GET_U_1(opp->nd_opt_pi_prefix_len),
1447 (opt_len != 4) ? "badlen" : "",
1448 bittok2str(icmp6_opt_pi_flag_values, "none", GET_U_1(opp->nd_opt_pi_flags_reserved)),
1449 get_lifetime(GET_BE_U_4(opp->nd_opt_pi_valid_time)));
1450 ND_PRINT(", pref. time %s",
1451 get_lifetime(GET_BE_U_4(opp->nd_opt_pi_preferred_time)));
1452 break;
1453 case ND_OPT_REDIRECTED_HEADER:
1454 print_unknown_data(ndo, bp,"\n\t ",opt_len<<3);
1455 /* xxx */
1456 break;
1457 case ND_OPT_MTU:
1458 opm = (const struct nd_opt_mtu *)op;
1459 ND_PRINT(" %u%s",
1460 GET_BE_U_4(opm->nd_opt_mtu_mtu),
1461 (opt_len != 1) ? "bad option length" : "" );
1462 break;
1463 case ND_OPT_RDNSS:
1464 oprd = (const struct nd_opt_rdnss *)op;
1465 l = (opt_len - 1) / 2;
1466 ND_PRINT(" lifetime %us,",
1467 GET_BE_U_4(oprd->nd_opt_rdnss_lifetime));
1468 for (i = 0; i < l; i++) {
1469 ND_PRINT(" addr: %s",
1470 GET_IP6ADDR_STRING(oprd->nd_opt_rdnss_addr[i]));
1471 }
1472 break;
1473 case ND_OPT_DNSSL:
1474 opds = (const struct nd_opt_dnssl *)op;
1475 ND_PRINT(" lifetime %us, domain(s):",
1476 GET_BE_U_4(opds->nd_opt_dnssl_lifetime));
1477 domp = cp + 8; /* domain names, variable-sized, RFC1035-encoded */
1478 while (domp < cp + (opt_len << 3) && GET_U_1(domp) != '\0') {
1479 ND_PRINT(" ");
1480 if ((domp = fqdn_print(ndo, domp, bp)) == NULL)
1481 goto trunc;
1482 }
1483 break;
1484 case ND_OPT_ADVINTERVAL:
1485 opa = (const struct nd_opt_advinterval *)op;
1486 ND_PRINT(" %ums",
1487 GET_BE_U_4(opa->nd_opt_adv_interval));
1488 break;
1489 case ND_OPT_HOMEAGENT_INFO:
1490 oph = (const struct nd_opt_homeagent_info *)op;
1491 ND_PRINT(" preference %u, lifetime %u",
1492 GET_BE_U_2(oph->nd_opt_hai_preference),
1493 GET_BE_U_2(oph->nd_opt_hai_lifetime));
1494 break;
1495 case ND_OPT_ROUTE_INFO:
1496 opri = (const struct nd_opt_route_info *)op;
1497 ND_TCHECK_4(opri->nd_opt_rti_lifetime);
1498 memset(&in6, 0, sizeof(in6));
1499 switch (opt_len) {
1500 case 1:
1501 break;
1502 case 2:
1503 GET_CPY_BYTES(&in6, opri + 1, 8);
1504 break;
1505 case 3:
1506 GET_CPY_BYTES(&in6, opri + 1, 16);
1507 break;
1508 default:
1509 goto trunc;
1510 }
1511 ND_PRINT(" %s/%u", ip6addr_string(ndo, (const u_char *)&in6), /* local buffer, not packet data; don't use GET_IP6ADDR_STRING() */
1512 GET_U_1(opri->nd_opt_rti_prefixlen));
1513 ND_PRINT(", pref=%s",
1514 get_rtpref(GET_U_1(opri->nd_opt_rti_flags)));
1515 ND_PRINT(", lifetime=%s",
1516 get_lifetime(GET_BE_U_4(opri->nd_opt_rti_lifetime)));
1517 break;
1518 default:
1519 if (ndo->ndo_vflag <= 1) {
1520 print_unknown_data(ndo,cp+2,"\n\t ", (opt_len << 3) - 2); /* skip option header */
1521 return 0;
1522 }
1523 break;
1524 }
1525 /* do we want to see an additional hexdump ? */
1526 if (ndo->ndo_vflag> 1)
1527 print_unknown_data(ndo, cp+2,"\n\t ", (opt_len << 3) - 2); /* skip option header */
1528
1529 cp += opt_len << 3;
1530 resid -= opt_len << 3;
1531 }
1532 return 0;
1533
1534 trunc:
1535 return -1;
1536 }
1537
1538 static void
1539 mld6_print(netdissect_options *ndo, const u_char *bp)
1540 {
1541 const struct mld6_hdr *mp = (const struct mld6_hdr *)bp;
1542 const u_char *ep;
1543
1544 /* 'ep' points to the end of available data. */
1545 ep = ndo->ndo_snapend;
1546
1547 if ((const u_char *)mp + sizeof(*mp) > ep)
1548 return;
1549
1550 ND_PRINT("max resp delay: %u ", GET_BE_U_2(mp->mld6_maxdelay));
1551 ND_PRINT("addr: %s", GET_IP6ADDR_STRING(mp->mld6_addr));
1552 }
1553
1554 static void
1555 mldv2_report_print(netdissect_options *ndo, const u_char *bp, u_int len)
1556 {
1557 const struct icmp6_hdr *icp = (const struct icmp6_hdr *) bp;
1558 u_int group, nsrcs, ngroups;
1559 u_int i, j;
1560
1561 /* Minimum len is 8 */
1562 if (len < 8) {
1563 ND_PRINT(" [invalid len %u]", len);
1564 return;
1565 }
1566
1567 ngroups = GET_BE_U_2(icp->icmp6_data16[1]);
1568 ND_PRINT(", %u group record(s)", ngroups);
1569 if (ndo->ndo_vflag > 0) {
1570 /* Print the group records */
1571 group = 8;
1572 for (i = 0; i < ngroups; i++) {
1573 /* type(1) + auxlen(1) + numsrc(2) + grp(16) */
1574 if (len < group + 20) {
1575 ND_PRINT(" [invalid number of groups]");
1576 return;
1577 }
1578 ND_PRINT(" [gaddr %s", GET_IP6ADDR_STRING(bp + group + 4));
1579 ND_PRINT(" %s", tok2str(mldv2report2str, " [v2-report-#%u]",
1580 GET_U_1(bp + group)));
1581 nsrcs = GET_BE_U_2(bp + group + 2);
1582 /* Check the number of sources and print them */
1583 if (len < group + 20 + (nsrcs * sizeof(nd_ipv6))) {
1584 ND_PRINT(" [invalid number of sources %u]", nsrcs);
1585 return;
1586 }
1587 if (ndo->ndo_vflag == 1)
1588 ND_PRINT(", %u source(s)", nsrcs);
1589 else {
1590 /* Print the sources */
1591 ND_PRINT(" {");
1592 for (j = 0; j < nsrcs; j++) {
1593 ND_PRINT(" %s", GET_IP6ADDR_STRING(bp + group + 20 + (j * sizeof(nd_ipv6))));
1594 }
1595 ND_PRINT(" }");
1596 }
1597 /* Next group record */
1598 group += 20 + nsrcs * sizeof(nd_ipv6);
1599 ND_PRINT("]");
1600 }
1601 }
1602 }
1603
1604 static void
1605 mldv2_query_print(netdissect_options *ndo, const u_char *bp, u_int len)
1606 {
1607 const struct icmp6_hdr *icp = (const struct icmp6_hdr *) bp;
1608 u_int mrc;
1609 u_int mrt, qqi;
1610 u_int nsrcs;
1611 u_int i;
1612
1613 /* Minimum len is 28 */
1614 if (len < 28) {
1615 ND_PRINT(" [invalid len %u]", len);
1616 return;
1617 }
1618 mrc = GET_BE_U_2(icp->icmp6_data16[0]);
1619 if (mrc < 32768) {
1620 mrt = mrc;
1621 } else {
1622 mrt = ((mrc & 0x0fff) | 0x1000) << (((mrc & 0x7000) >> 12) + 3);
1623 }
1624 if (ndo->ndo_vflag) {
1625 ND_PRINT(" [max resp delay=%u]", mrt);
1626 }
1627 ND_PRINT(" [gaddr %s", GET_IP6ADDR_STRING(bp + 8));
1628
1629 if (ndo->ndo_vflag) {
1630 if (GET_U_1(bp + 24) & 0x08) {
1631 ND_PRINT(" sflag");
1632 }
1633 if (GET_U_1(bp + 24) & 0x07) {
1634 ND_PRINT(" robustness=%u", GET_U_1(bp + 24) & 0x07);
1635 }
1636 if (GET_U_1(bp + 25) < 128) {
1637 qqi = GET_U_1(bp + 25);
1638 } else {
1639 qqi = ((GET_U_1(bp + 25) & 0x0f) | 0x10) <<
1640 (((GET_U_1(bp + 25) & 0x70) >> 4) + 3);
1641 }
1642 ND_PRINT(" qqi=%u", qqi);
1643 }
1644
1645 nsrcs = GET_BE_U_2(bp + 26);
1646 if (nsrcs > 0) {
1647 if (len < 28 + nsrcs * sizeof(nd_ipv6))
1648 ND_PRINT(" [invalid number of sources]");
1649 else if (ndo->ndo_vflag > 1) {
1650 ND_PRINT(" {");
1651 for (i = 0; i < nsrcs; i++) {
1652 ND_PRINT(" %s", GET_IP6ADDR_STRING(bp + 28 + (i * sizeof(nd_ipv6))));
1653 }
1654 ND_PRINT(" }");
1655 } else
1656 ND_PRINT(", %u source(s)", nsrcs);
1657 }
1658 ND_PRINT("]");
1659 }
1660
1661 static void
1662 dnsname_print(netdissect_options *ndo, const u_char *cp, const u_char *ep)
1663 {
1664 int i;
1665
1666 /* DNS name decoding - no decompression */
1667 ND_PRINT(", \"");
1668 while (cp < ep) {
1669 i = GET_U_1(cp);
1670 cp++;
1671 if (i) {
1672 if (i > ep - cp) {
1673 ND_PRINT("???");
1674 break;
1675 }
1676 while (i-- && cp < ep) {
1677 fn_print_char(ndo, GET_U_1(cp));
1678 cp++;
1679 }
1680 if (cp + 1 < ep && GET_U_1(cp))
1681 ND_PRINT(".");
1682 } else {
1683 if (cp == ep) {
1684 /* FQDN */
1685 ND_PRINT(".");
1686 } else if (cp + 1 == ep && GET_U_1(cp) == '\0') {
1687 /* truncated */
1688 } else {
1689 /* invalid */
1690 ND_PRINT("???");
1691 }
1692 break;
1693 }
1694 }
1695 ND_PRINT("\"");
1696 }
1697
1698 static void
1699 icmp6_nodeinfo_print(netdissect_options *ndo, u_int icmp6len, const u_char *bp, const u_char *ep)
1700 {
1701 const struct icmp6_nodeinfo *ni6;
1702 const struct icmp6_hdr *dp;
1703 const u_char *cp;
1704 size_t siz, i;
1705 int needcomma;
1706
1707 if (ep < bp)
1708 return;
1709 dp = (const struct icmp6_hdr *)bp;
1710 ni6 = (const struct icmp6_nodeinfo *)bp;
1711 siz = ep - bp;
1712
1713 switch (GET_U_1(ni6->ni_type)) {
1714 case ICMP6_NI_QUERY:
1715 if (siz == sizeof(*dp) + 4) {
1716 /* KAME who-are-you */
1717 ND_PRINT(" who-are-you request");
1718 break;
1719 }
1720 ND_PRINT(" node information query");
1721
1722 ND_TCHECK_LEN(dp, sizeof(*ni6));
1723 ni6 = (const struct icmp6_nodeinfo *)dp;
1724 ND_PRINT(" ("); /*)*/
1725 switch (GET_BE_U_2(ni6->ni_qtype)) {
1726 case NI_QTYPE_NOOP:
1727 ND_PRINT("noop");
1728 break;
1729 case NI_QTYPE_SUPTYPES:
1730 ND_PRINT("supported qtypes");
1731 i = GET_BE_U_2(ni6->ni_flags);
1732 if (i)
1733 ND_PRINT(" [%s]", (i & 0x01) ? "C" : "");
1734 break;
1735 case NI_QTYPE_FQDN:
1736 ND_PRINT("DNS name");
1737 break;
1738 case NI_QTYPE_NODEADDR:
1739 ND_PRINT("node addresses");
1740 i = GET_BE_U_2(ni6->ni_flags);
1741 if (!i)
1742 break;
1743 /* NI_NODEADDR_FLAG_TRUNCATE undefined for query */
1744 ND_PRINT(" [%s%s%s%s%s%s]",
1745 (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
1746 (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
1747 (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
1748 (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
1749 (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
1750 (i & NI_NODEADDR_FLAG_ALL) ? "A" : "");
1751 break;
1752 default:
1753 ND_PRINT("unknown");
1754 break;
1755 }
1756
1757 if (GET_BE_U_2(ni6->ni_qtype) == NI_QTYPE_NOOP ||
1758 GET_BE_U_2(ni6->ni_qtype) == NI_QTYPE_SUPTYPES) {
1759 if (siz != sizeof(*ni6))
1760 if (ndo->ndo_vflag)
1761 ND_PRINT(", invalid len");
1762 /*(*/
1763 ND_PRINT(")");
1764 break;
1765 }
1766
1767 /* XXX backward compat, icmp-name-lookup-03 */
1768 if (siz == sizeof(*ni6)) {
1769 ND_PRINT(", 03 draft");
1770 /*(*/
1771 ND_PRINT(")");
1772 break;
1773 }
1774
1775 cp = (const u_char *)(ni6 + 1);
1776 switch (GET_U_1(ni6->ni_code)) {
1777 case ICMP6_NI_SUBJ_IPV6:
1778 if (!ND_TTEST_LEN(dp, sizeof(*ni6) + sizeof(nd_ipv6)))
1779 break;
1780 if (siz != sizeof(*ni6) + sizeof(nd_ipv6)) {
1781 if (ndo->ndo_vflag)
1782 ND_PRINT(", invalid subject len");
1783 break;
1784 }
1785 ND_PRINT(", subject=%s",
1786 GET_IP6ADDR_STRING(cp));
1787 break;
1788 case ICMP6_NI_SUBJ_FQDN:
1789 ND_PRINT(", subject=DNS name");
1790 if (GET_U_1(cp) == ep - cp - 1) {
1791 /* icmp-name-lookup-03, pascal string */
1792 if (ndo->ndo_vflag)
1793 ND_PRINT(", 03 draft");
1794 cp++;
1795 ND_PRINT(", \"");
1796 while (cp < ep) {
1797 fn_print_char(ndo, GET_U_1(cp));
1798 cp++;
1799 }
1800 ND_PRINT("\"");
1801 } else
1802 dnsname_print(ndo, cp, ep);
1803 break;
1804 case ICMP6_NI_SUBJ_IPV4:
1805 if (!ND_TTEST_LEN(dp, sizeof(*ni6) + sizeof(nd_ipv4)))
1806 break;
1807 if (siz != sizeof(*ni6) + sizeof(nd_ipv4)) {
1808 if (ndo->ndo_vflag)
1809 ND_PRINT(", invalid subject len");
1810 break;
1811 }
1812 ND_PRINT(", subject=%s",
1813 GET_IPADDR_STRING(cp));
1814 break;
1815 default:
1816 ND_PRINT(", unknown subject");
1817 break;
1818 }
1819
1820 /*(*/
1821 ND_PRINT(")");
1822 break;
1823
1824 case ICMP6_NI_REPLY:
1825 if (icmp6len > siz)
1826 goto trunc;
1827
1828 needcomma = 0;
1829
1830 ND_TCHECK_LEN(dp, sizeof(*ni6));
1831 ni6 = (const struct icmp6_nodeinfo *)dp;
1832 ND_PRINT(" node information reply");
1833 ND_PRINT(" ("); /*)*/
1834 switch (GET_U_1(ni6->ni_code)) {
1835 case ICMP6_NI_SUCCESS:
1836 if (ndo->ndo_vflag) {
1837 ND_PRINT("success");
1838 needcomma++;
1839 }
1840 break;
1841 case ICMP6_NI_REFUSED:
1842 ND_PRINT("refused");
1843 needcomma++;
1844 if (siz != sizeof(*ni6))
1845 if (ndo->ndo_vflag)
1846 ND_PRINT(", invalid length");
1847 break;
1848 case ICMP6_NI_UNKNOWN:
1849 ND_PRINT("unknown");
1850 needcomma++;
1851 if (siz != sizeof(*ni6))
1852 if (ndo->ndo_vflag)
1853 ND_PRINT(", invalid length");
1854 break;
1855 }
1856
1857 if (GET_U_1(ni6->ni_code) != ICMP6_NI_SUCCESS) {
1858 /*(*/
1859 ND_PRINT(")");
1860 break;
1861 }
1862
1863 switch (GET_BE_U_2(ni6->ni_qtype)) {
1864 case NI_QTYPE_NOOP:
1865 if (needcomma)
1866 ND_PRINT(", ");
1867 ND_PRINT("noop");
1868 if (siz != sizeof(*ni6))
1869 if (ndo->ndo_vflag)
1870 ND_PRINT(", invalid length");
1871 break;
1872 case NI_QTYPE_SUPTYPES:
1873 if (needcomma)
1874 ND_PRINT(", ");
1875 ND_PRINT("supported qtypes");
1876 i = GET_BE_U_2(ni6->ni_flags);
1877 if (i)
1878 ND_PRINT(" [%s]", (i & 0x01) ? "C" : "");
1879 break;
1880 case NI_QTYPE_FQDN:
1881 if (needcomma)
1882 ND_PRINT(", ");
1883 ND_PRINT("DNS name");
1884 cp = (const u_char *)(ni6 + 1) + 4;
1885 if (GET_U_1(cp) == ep - cp - 1) {
1886 /* icmp-name-lookup-03, pascal string */
1887 if (ndo->ndo_vflag)
1888 ND_PRINT(", 03 draft");
1889 cp++;
1890 ND_PRINT(", \"");
1891 while (cp < ep) {
1892 fn_print_char(ndo, GET_U_1(cp));
1893 cp++;
1894 }
1895 ND_PRINT("\"");
1896 } else
1897 dnsname_print(ndo, cp, ep);
1898 if ((GET_BE_U_2(ni6->ni_flags) & 0x01) != 0)
1899 ND_PRINT(" [TTL=%u]", GET_BE_U_4(ni6 + 1));
1900 break;
1901 case NI_QTYPE_NODEADDR:
1902 if (needcomma)
1903 ND_PRINT(", ");
1904 ND_PRINT("node addresses");
1905 i = sizeof(*ni6);
1906 while (i < siz) {
1907 if (i + sizeof(uint32_t) + sizeof(nd_ipv6) > siz)
1908 break;
1909 ND_PRINT(" %s(%u)",
1910 GET_IP6ADDR_STRING(bp + i + sizeof(uint32_t)),
1911 GET_BE_U_4(bp + i));
1912 i += sizeof(uint32_t) + sizeof(nd_ipv6);
1913 }
1914 i = GET_BE_U_2(ni6->ni_flags);
1915 if (!i)
1916 break;
1917 ND_PRINT(" [%s%s%s%s%s%s%s]",
1918 (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
1919 (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
1920 (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
1921 (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
1922 (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
1923 (i & NI_NODEADDR_FLAG_ALL) ? "A" : "",
1924 (i & NI_NODEADDR_FLAG_TRUNCATE) ? "T" : "");
1925 break;
1926 default:
1927 if (needcomma)
1928 ND_PRINT(", ");
1929 ND_PRINT("unknown");
1930 break;
1931 }
1932
1933 /*(*/
1934 ND_PRINT(")");
1935 break;
1936 }
1937 return;
1938
1939 trunc:
1940 nd_print_trunc(ndo);
1941 }
1942
1943 static void
1944 icmp6_rrenum_print(netdissect_options *ndo, const u_char *bp, const u_char *ep)
1945 {
1946 const struct icmp6_router_renum *rr6;
1947 const char *cp;
1948 const struct rr_pco_match *match;
1949 const struct rr_pco_use *use;
1950 char hbuf[NI_MAXHOST];
1951 int n;
1952
1953 if (ep < bp)
1954 return;
1955 rr6 = (const struct icmp6_router_renum *)bp;
1956 cp = (const char *)(rr6 + 1);
1957
1958 ND_TCHECK_4(rr6->rr_reserved);
1959 switch (GET_U_1(rr6->rr_code)) {
1960 case ICMP6_ROUTER_RENUMBERING_COMMAND:
1961 ND_PRINT(", command");
1962 break;
1963 case ICMP6_ROUTER_RENUMBERING_RESULT:
1964 ND_PRINT(", result");
1965 break;
1966 case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET:
1967 ND_PRINT(", sequence number reset");
1968 break;
1969 default:
1970 ND_PRINT(", code-#%u", GET_U_1(rr6->rr_code));
1971 break;
1972 }
1973
1974 ND_PRINT(", seq=%u", GET_BE_U_4(rr6->rr_seqnum));
1975
1976 if (ndo->ndo_vflag) {
1977 uint8_t rr_flags = GET_U_1(rr6->rr_flags);
1978 #define F(x, y) (rr_flags & (x) ? (y) : "")
1979 ND_PRINT("["); /*]*/
1980 if (rr_flags) {
1981 ND_PRINT("%s%s%s%s%s,", F(ICMP6_RR_FLAGS_TEST, "T"),
1982 F(ICMP6_RR_FLAGS_REQRESULT, "R"),
1983 F(ICMP6_RR_FLAGS_FORCEAPPLY, "A"),
1984 F(ICMP6_RR_FLAGS_SPECSITE, "S"),
1985 F(ICMP6_RR_FLAGS_PREVDONE, "P"));
1986 }
1987 ND_PRINT("seg=%u,", GET_U_1(rr6->rr_segnum));
1988 ND_PRINT("maxdelay=%u", GET_BE_U_2(rr6->rr_maxdelay));
1989 if (GET_BE_U_4(rr6->rr_reserved))
1990 ND_PRINT("rsvd=0x%x", GET_BE_U_4(rr6->rr_reserved));
1991 /*[*/
1992 ND_PRINT("]");
1993 #undef F
1994 }
1995
1996 if (GET_U_1(rr6->rr_code) == ICMP6_ROUTER_RENUMBERING_COMMAND) {
1997 match = (const struct rr_pco_match *)cp;
1998 cp = (const char *)(match + 1);
1999
2000 ND_TCHECK_16(match->rpm_prefix);
2001
2002 if (ndo->ndo_vflag > 1)
2003 ND_PRINT("\n\t");
2004 else
2005 ND_PRINT(" ");
2006 ND_PRINT("match("); /*)*/
2007 switch (GET_U_1(match->rpm_code)) {
2008 case RPM_PCO_ADD: ND_PRINT("add"); break;
2009 case RPM_PCO_CHANGE: ND_PRINT("change"); break;
2010 case RPM_PCO_SETGLOBAL: ND_PRINT("setglobal"); break;
2011 default: ND_PRINT("#%u",
2012 GET_U_1(match->rpm_code)); break;
2013 }
2014
2015 if (ndo->ndo_vflag) {
2016 ND_PRINT(",ord=%u", GET_U_1(match->rpm_ordinal));
2017 ND_PRINT(",min=%u", GET_U_1(match->rpm_minlen));
2018 ND_PRINT(",max=%u", GET_U_1(match->rpm_maxlen));
2019 }
2020 if (addrtostr6(match->rpm_prefix, hbuf, sizeof(hbuf)))
2021 ND_PRINT(",%s/%u", hbuf, GET_U_1(match->rpm_matchlen));
2022 else
2023 ND_PRINT(",?/%u", GET_U_1(match->rpm_matchlen));
2024 /*(*/
2025 ND_PRINT(")");
2026
2027 n = GET_U_1(match->rpm_len) - 3;
2028 if (n % 4)
2029 goto trunc;
2030 n /= 4;
2031 while (n-- > 0) {
2032 use = (const struct rr_pco_use *)cp;
2033 cp = (const char *)(use + 1);
2034
2035 ND_TCHECK_16(use->rpu_prefix);
2036
2037 if (ndo->ndo_vflag > 1)
2038 ND_PRINT("\n\t");
2039 else
2040 ND_PRINT(" ");
2041 ND_PRINT("use("); /*)*/
2042 if (GET_U_1(use->rpu_flags)) {
2043 #define F(x, y) (GET_U_1(use->rpu_flags) & (x) ? (y) : "")
2044 ND_PRINT("%s%s,",
2045 F(ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME, "V"),
2046 F(ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME, "P"));
2047 #undef F
2048 }
2049 if (ndo->ndo_vflag) {
2050 ND_PRINT("mask=0x%x,",
2051 GET_U_1(use->rpu_ramask));
2052 ND_PRINT("raflags=0x%x,",
2053 GET_U_1(use->rpu_raflags));
2054 if (GET_BE_U_4(use->rpu_vltime) == 0xffffffff)
2055 ND_PRINT("vltime=infty,");
2056 else
2057 ND_PRINT("vltime=%u,",
2058 GET_BE_U_4(use->rpu_vltime));
2059 if (GET_BE_U_4(use->rpu_pltime) == 0xffffffff)
2060 ND_PRINT("pltime=infty,");
2061 else
2062 ND_PRINT("pltime=%u,",
2063 GET_BE_U_4(use->rpu_pltime));
2064 }
2065 if (addrtostr6(use->rpu_prefix, hbuf, sizeof(hbuf)))
2066 ND_PRINT("%s/%u/%u", hbuf,
2067 GET_U_1(use->rpu_uselen),
2068 GET_U_1(use->rpu_keeplen));
2069 else
2070 ND_PRINT("?/%u/%u", GET_U_1(use->rpu_uselen),
2071 GET_U_1(use->rpu_keeplen));
2072 /*(*/
2073 ND_PRINT(")");
2074 }
2075 }
2076
2077 return;
2078
2079 trunc:
2080 nd_print_trunc(ndo);
2081 }
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