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[tcpdump] / print-icmp6.c
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 #ifdef HAVE_CONFIG_H
23 #include "config.h"
24 #endif
25
26 #ifdef INET6
27
28 #include <tcpdump-stdinc.h>
29
30 #include <stdio.h>
31 #include <string.h>
32
33 #include "netdissect.h"
34 #include "interface.h"
35 #include "addrtoname.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 u_int8_t icmp6_type; /* type field */
78 u_int8_t icmp6_code; /* code field */
79 u_int16_t icmp6_cksum; /* checksum field */
80 union {
81 u_int32_t icmp6_un_data32[1]; /* type-specific field */
82 u_int16_t icmp6_un_data16[2]; /* type-specific field */
83 u_int8_t icmp6_un_data8[4]; /* type-specific field */
84 } icmp6_dataun;
85 };
86
87 #define icmp6_data32 icmp6_dataun.icmp6_un_data32
88 #define icmp6_data16 icmp6_dataun.icmp6_un_data16
89 #define icmp6_data8 icmp6_dataun.icmp6_un_data8
90 #define icmp6_pptr icmp6_data32[0] /* parameter prob */
91 #define icmp6_mtu icmp6_data32[0] /* packet too big */
92 #define icmp6_id icmp6_data16[0] /* echo request/reply */
93 #define icmp6_seq icmp6_data16[1] /* echo request/reply */
94 #define icmp6_maxdelay icmp6_data16[0] /* mcast group membership */
95
96 #define ICMP6_DST_UNREACH 1 /* dest unreachable, codes: */
97 #define ICMP6_PACKET_TOO_BIG 2 /* packet too big */
98 #define ICMP6_TIME_EXCEEDED 3 /* time exceeded, code: */
99 #define ICMP6_PARAM_PROB 4 /* ip6 header bad */
100
101 #define ICMP6_ECHO_REQUEST 128 /* echo service */
102 #define ICMP6_ECHO_REPLY 129 /* echo reply */
103 #define ICMP6_MEMBERSHIP_QUERY 130 /* group membership query */
104 #define MLD6_LISTENER_QUERY 130 /* multicast listener query */
105 #define ICMP6_MEMBERSHIP_REPORT 131 /* group membership report */
106 #define MLD6_LISTENER_REPORT 131 /* multicast listener report */
107 #define ICMP6_MEMBERSHIP_REDUCTION 132 /* group membership termination */
108 #define MLD6_LISTENER_DONE 132 /* multicast listener done */
109
110 #define ND_ROUTER_SOLICIT 133 /* router solicitation */
111 #define ND_ROUTER_ADVERT 134 /* router advertisement */
112 #define ND_NEIGHBOR_SOLICIT 135 /* neighbor solicitation */
113 #define ND_NEIGHBOR_ADVERT 136 /* neighbor advertisement */
114 #define ND_REDIRECT 137 /* redirect */
115
116 #define ICMP6_ROUTER_RENUMBERING 138 /* router renumbering */
117
118 #define ICMP6_WRUREQUEST 139 /* who are you request */
119 #define ICMP6_WRUREPLY 140 /* who are you reply */
120 #define ICMP6_FQDN_QUERY 139 /* FQDN query */
121 #define ICMP6_FQDN_REPLY 140 /* FQDN reply */
122 #define ICMP6_NI_QUERY 139 /* node information request */
123 #define ICMP6_NI_REPLY 140 /* node information reply */
124 #define IND_SOLICIT 141 /* inverse neighbor solicitation */
125 #define IND_ADVERT 142 /* inverse neighbor advertisement */
126
127 #define ICMP6_V2_MEMBERSHIP_REPORT 143 /* v2 membership report */
128 #define MLDV2_LISTENER_REPORT 143 /* v2 multicast listener report */
129 #define ICMP6_HADISCOV_REQUEST 144
130 #define ICMP6_HADISCOV_REPLY 145
131 #define ICMP6_MOBILEPREFIX_SOLICIT 146
132 #define ICMP6_MOBILEPREFIX_ADVERT 147
133
134 #define MLD6_MTRACE_RESP 200 /* mtrace response(to sender) */
135 #define MLD6_MTRACE 201 /* mtrace messages */
136
137 #define ICMP6_MAXTYPE 201
138
139 #define ICMP6_DST_UNREACH_NOROUTE 0 /* no route to destination */
140 #define ICMP6_DST_UNREACH_ADMIN 1 /* administratively prohibited */
141 #define ICMP6_DST_UNREACH_NOTNEIGHBOR 2 /* not a neighbor(obsolete) */
142 #define ICMP6_DST_UNREACH_BEYONDSCOPE 2 /* beyond scope of source address */
143 #define ICMP6_DST_UNREACH_ADDR 3 /* address unreachable */
144 #define ICMP6_DST_UNREACH_NOPORT 4 /* port unreachable */
145
146 #define ICMP6_TIME_EXCEED_TRANSIT 0 /* ttl==0 in transit */
147 #define ICMP6_TIME_EXCEED_REASSEMBLY 1 /* ttl==0 in reass */
148
149 #define ICMP6_PARAMPROB_HEADER 0 /* erroneous header field */
150 #define ICMP6_PARAMPROB_NEXTHEADER 1 /* unrecognized next header */
151 #define ICMP6_PARAMPROB_OPTION 2 /* unrecognized option */
152
153 #define ICMP6_INFOMSG_MASK 0x80 /* all informational messages */
154
155 #define ICMP6_NI_SUBJ_IPV6 0 /* Query Subject is an IPv6 address */
156 #define ICMP6_NI_SUBJ_FQDN 1 /* Query Subject is a Domain name */
157 #define ICMP6_NI_SUBJ_IPV4 2 /* Query Subject is an IPv4 address */
158
159 #define ICMP6_NI_SUCCESS 0 /* node information successful reply */
160 #define ICMP6_NI_REFUSED 1 /* node information request is refused */
161 #define ICMP6_NI_UNKNOWN 2 /* unknown Qtype */
162
163 #define ICMP6_ROUTER_RENUMBERING_COMMAND 0 /* rr command */
164 #define ICMP6_ROUTER_RENUMBERING_RESULT 1 /* rr result */
165 #define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET 255 /* rr seq num reset */
166
167 /* Used in kernel only */
168 #define ND_REDIRECT_ONLINK 0 /* redirect to an on-link node */
169 #define ND_REDIRECT_ROUTER 1 /* redirect to a better router */
170
171 /*
172 * Multicast Listener Discovery
173 */
174 struct mld6_hdr {
175 struct icmp6_hdr mld6_hdr;
176 struct in6_addr mld6_addr; /* multicast address */
177 };
178
179 #define mld6_type mld6_hdr.icmp6_type
180 #define mld6_code mld6_hdr.icmp6_code
181 #define mld6_cksum mld6_hdr.icmp6_cksum
182 #define mld6_maxdelay mld6_hdr.icmp6_data16[0]
183 #define mld6_reserved mld6_hdr.icmp6_data16[1]
184
185 #define MLD_MINLEN 24
186 #define MLDV2_MINLEN 28
187
188 /*
189 * Neighbor Discovery
190 */
191
192 struct nd_router_solicit { /* router solicitation */
193 struct icmp6_hdr nd_rs_hdr;
194 /* could be followed by options */
195 };
196
197 #define nd_rs_type nd_rs_hdr.icmp6_type
198 #define nd_rs_code nd_rs_hdr.icmp6_code
199 #define nd_rs_cksum nd_rs_hdr.icmp6_cksum
200 #define nd_rs_reserved nd_rs_hdr.icmp6_data32[0]
201
202 struct nd_router_advert { /* router advertisement */
203 struct icmp6_hdr nd_ra_hdr;
204 u_int32_t nd_ra_reachable; /* reachable time */
205 u_int32_t nd_ra_retransmit; /* retransmit timer */
206 /* could be followed by options */
207 };
208
209 #define nd_ra_type nd_ra_hdr.icmp6_type
210 #define nd_ra_code nd_ra_hdr.icmp6_code
211 #define nd_ra_cksum nd_ra_hdr.icmp6_cksum
212 #define nd_ra_curhoplimit nd_ra_hdr.icmp6_data8[0]
213 #define nd_ra_flags_reserved nd_ra_hdr.icmp6_data8[1]
214 #define ND_RA_FLAG_MANAGED 0x80
215 #define ND_RA_FLAG_OTHER 0x40
216 #define ND_RA_FLAG_HOME_AGENT 0x20
217
218 /*
219 * Router preference values based on draft-draves-ipngwg-router-selection-01.
220 * These are non-standard definitions.
221 */
222 #define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */
223
224 #define ND_RA_FLAG_RTPREF_HIGH 0x08 /* 00001000 */
225 #define ND_RA_FLAG_RTPREF_MEDIUM 0x00 /* 00000000 */
226 #define ND_RA_FLAG_RTPREF_LOW 0x18 /* 00011000 */
227 #define ND_RA_FLAG_RTPREF_RSV 0x10 /* 00010000 */
228
229 #define nd_ra_router_lifetime nd_ra_hdr.icmp6_data16[1]
230
231 struct nd_neighbor_solicit { /* neighbor solicitation */
232 struct icmp6_hdr nd_ns_hdr;
233 struct in6_addr nd_ns_target; /*target address */
234 /* could be followed by options */
235 };
236
237 #define nd_ns_type nd_ns_hdr.icmp6_type
238 #define nd_ns_code nd_ns_hdr.icmp6_code
239 #define nd_ns_cksum nd_ns_hdr.icmp6_cksum
240 #define nd_ns_reserved nd_ns_hdr.icmp6_data32[0]
241
242 struct nd_neighbor_advert { /* neighbor advertisement */
243 struct icmp6_hdr nd_na_hdr;
244 struct in6_addr nd_na_target; /* target address */
245 /* could be followed by options */
246 };
247
248 #define nd_na_type nd_na_hdr.icmp6_type
249 #define nd_na_code nd_na_hdr.icmp6_code
250 #define nd_na_cksum nd_na_hdr.icmp6_cksum
251 #define nd_na_flags_reserved nd_na_hdr.icmp6_data32[0]
252
253 #define ND_NA_FLAG_ROUTER 0x80000000
254 #define ND_NA_FLAG_SOLICITED 0x40000000
255 #define ND_NA_FLAG_OVERRIDE 0x20000000
256
257 struct nd_redirect { /* redirect */
258 struct icmp6_hdr nd_rd_hdr;
259 struct in6_addr nd_rd_target; /* target address */
260 struct in6_addr nd_rd_dst; /* destination address */
261 /* could be followed by options */
262 };
263
264 #define nd_rd_type nd_rd_hdr.icmp6_type
265 #define nd_rd_code nd_rd_hdr.icmp6_code
266 #define nd_rd_cksum nd_rd_hdr.icmp6_cksum
267 #define nd_rd_reserved nd_rd_hdr.icmp6_data32[0]
268
269 struct nd_opt_hdr { /* Neighbor discovery option header */
270 u_int8_t nd_opt_type;
271 u_int8_t nd_opt_len;
272 /* followed by option specific data*/
273 };
274
275 #define ND_OPT_SOURCE_LINKADDR 1
276 #define ND_OPT_TARGET_LINKADDR 2
277 #define ND_OPT_PREFIX_INFORMATION 3
278 #define ND_OPT_REDIRECTED_HEADER 4
279 #define ND_OPT_MTU 5
280 #define ND_OPT_ADVINTERVAL 7
281 #define ND_OPT_HOMEAGENT_INFO 8
282 #define ND_OPT_ROUTE_INFO 24 /* RFC4191 */
283 #define ND_OPT_RDNSS 25
284 #define ND_OPT_DNSSL 31
285
286 struct nd_opt_prefix_info { /* prefix information */
287 u_int8_t nd_opt_pi_type;
288 u_int8_t nd_opt_pi_len;
289 u_int8_t nd_opt_pi_prefix_len;
290 u_int8_t nd_opt_pi_flags_reserved;
291 u_int8_t nd_opt_pi_valid_time[4];
292 u_int8_t nd_opt_pi_preferred_time[4];
293 u_int8_t nd_opt_pi_reserved2[4];
294 struct in6_addr nd_opt_pi_prefix;
295 };
296
297 #define ND_OPT_PI_FLAG_ONLINK 0x80
298 #define ND_OPT_PI_FLAG_AUTO 0x40
299 #define ND_OPT_PI_FLAG_ROUTER 0x20 /*2292bis*/
300
301 struct nd_opt_rd_hdr { /* redirected header */
302 u_int8_t nd_opt_rh_type;
303 u_int8_t nd_opt_rh_len;
304 u_int16_t nd_opt_rh_reserved1;
305 u_int32_t nd_opt_rh_reserved2;
306 /* followed by IP header and data */
307 };
308
309 struct nd_opt_mtu { /* MTU option */
310 u_int8_t nd_opt_mtu_type;
311 u_int8_t nd_opt_mtu_len;
312 u_int16_t nd_opt_mtu_reserved;
313 u_int32_t nd_opt_mtu_mtu;
314 };
315
316 struct nd_opt_rdnss { /* RDNSS RFC 6106 5.1 */
317 u_int8_t nd_opt_rdnss_type;
318 u_int8_t nd_opt_rdnss_len;
319 u_int16_t nd_opt_rdnss_reserved;
320 u_int32_t nd_opt_rdnss_lifetime;
321 struct in6_addr nd_opt_rdnss_addr[1]; /* variable-length */
322 };
323
324 struct nd_opt_dnssl { /* DNSSL RFC 6106 5.2 */
325 u_int8_t nd_opt_dnssl_type;
326 u_int8_t nd_opt_dnssl_len;
327 u_int16_t nd_opt_dnssl_reserved;
328 u_int32_t nd_opt_dnssl_lifetime;
329 /* followed by list of DNS search domains, variable-length */
330 };
331
332 struct nd_opt_advinterval { /* Advertisement interval option */
333 u_int8_t nd_opt_adv_type;
334 u_int8_t nd_opt_adv_len;
335 u_int16_t nd_opt_adv_reserved;
336 u_int32_t nd_opt_adv_interval;
337 };
338
339 struct nd_opt_homeagent_info { /* Home Agent info */
340 u_int8_t nd_opt_hai_type;
341 u_int8_t nd_opt_hai_len;
342 u_int16_t nd_opt_hai_reserved;
343 int16_t nd_opt_hai_preference;
344 u_int16_t nd_opt_hai_lifetime;
345 };
346
347 struct nd_opt_route_info { /* route info */
348 u_int8_t nd_opt_rti_type;
349 u_int8_t nd_opt_rti_len;
350 u_int8_t nd_opt_rti_prefixlen;
351 u_int8_t nd_opt_rti_flags;
352 u_int32_t nd_opt_rti_lifetime;
353 /* prefix follows */
354 };
355
356 /*
357 * icmp6 namelookup
358 */
359
360 struct icmp6_namelookup {
361 struct icmp6_hdr icmp6_nl_hdr;
362 u_int8_t icmp6_nl_nonce[8];
363 int32_t icmp6_nl_ttl;
364 #if 0
365 u_int8_t icmp6_nl_len;
366 u_int8_t icmp6_nl_name[3];
367 #endif
368 /* could be followed by options */
369 };
370
371 /*
372 * icmp6 node information
373 */
374 struct icmp6_nodeinfo {
375 struct icmp6_hdr icmp6_ni_hdr;
376 u_int8_t icmp6_ni_nonce[8];
377 /* could be followed by reply data */
378 };
379
380 #define ni_type icmp6_ni_hdr.icmp6_type
381 #define ni_code icmp6_ni_hdr.icmp6_code
382 #define ni_cksum icmp6_ni_hdr.icmp6_cksum
383 #define ni_qtype icmp6_ni_hdr.icmp6_data16[0]
384 #define ni_flags icmp6_ni_hdr.icmp6_data16[1]
385
386 #define NI_QTYPE_NOOP 0 /* NOOP */
387 #define NI_QTYPE_SUPTYPES 1 /* Supported Qtypes */
388 #define NI_QTYPE_FQDN 2 /* FQDN (draft 04) */
389 #define NI_QTYPE_DNSNAME 2 /* DNS Name */
390 #define NI_QTYPE_NODEADDR 3 /* Node Addresses */
391 #define NI_QTYPE_IPV4ADDR 4 /* IPv4 Addresses */
392
393 /* network endian */
394 #define NI_SUPTYPE_FLAG_COMPRESS ((u_int16_t)htons(0x1))
395 #define NI_FQDN_FLAG_VALIDTTL ((u_int16_t)htons(0x1))
396
397 /* network endian */
398 #define NI_NODEADDR_FLAG_TRUNCATE ((u_int16_t)htons(0x1))
399 #define NI_NODEADDR_FLAG_ALL ((u_int16_t)htons(0x2))
400 #define NI_NODEADDR_FLAG_COMPAT ((u_int16_t)htons(0x4))
401 #define NI_NODEADDR_FLAG_LINKLOCAL ((u_int16_t)htons(0x8))
402 #define NI_NODEADDR_FLAG_SITELOCAL ((u_int16_t)htons(0x10))
403 #define NI_NODEADDR_FLAG_GLOBAL ((u_int16_t)htons(0x20))
404 #define NI_NODEADDR_FLAG_ANYCAST ((u_int16_t)htons(0x40)) /* just experimental. not in spec */
405
406 struct ni_reply_fqdn {
407 u_int32_t ni_fqdn_ttl; /* TTL */
408 u_int8_t ni_fqdn_namelen; /* length in octets of the FQDN */
409 u_int8_t ni_fqdn_name[3]; /* XXX: alignment */
410 };
411
412 /*
413 * Router Renumbering. as router-renum-08.txt
414 */
415 struct icmp6_router_renum { /* router renumbering header */
416 struct icmp6_hdr rr_hdr;
417 u_int8_t rr_segnum;
418 u_int8_t rr_flags;
419 u_int16_t rr_maxdelay;
420 u_int32_t rr_reserved;
421 };
422 #define ICMP6_RR_FLAGS_TEST 0x80
423 #define ICMP6_RR_FLAGS_REQRESULT 0x40
424 #define ICMP6_RR_FLAGS_FORCEAPPLY 0x20
425 #define ICMP6_RR_FLAGS_SPECSITE 0x10
426 #define ICMP6_RR_FLAGS_PREVDONE 0x08
427
428 #define rr_type rr_hdr.icmp6_type
429 #define rr_code rr_hdr.icmp6_code
430 #define rr_cksum rr_hdr.icmp6_cksum
431 #define rr_seqnum rr_hdr.icmp6_data32[0]
432
433 struct rr_pco_match { /* match prefix part */
434 u_int8_t rpm_code;
435 u_int8_t rpm_len;
436 u_int8_t rpm_ordinal;
437 u_int8_t rpm_matchlen;
438 u_int8_t rpm_minlen;
439 u_int8_t rpm_maxlen;
440 u_int16_t rpm_reserved;
441 struct in6_addr rpm_prefix;
442 };
443
444 #define RPM_PCO_ADD 1
445 #define RPM_PCO_CHANGE 2
446 #define RPM_PCO_SETGLOBAL 3
447 #define RPM_PCO_MAX 4
448
449 struct rr_pco_use { /* use prefix part */
450 u_int8_t rpu_uselen;
451 u_int8_t rpu_keeplen;
452 u_int8_t rpu_ramask;
453 u_int8_t rpu_raflags;
454 u_int32_t rpu_vltime;
455 u_int32_t rpu_pltime;
456 u_int32_t rpu_flags;
457 struct in6_addr rpu_prefix;
458 };
459 #define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK 0x80
460 #define ICMP6_RR_PCOUSE_RAFLAGS_AUTO 0x40
461
462 /* network endian */
463 #define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME ((u_int32_t)htonl(0x80000000))
464 #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME ((u_int32_t)htonl(0x40000000))
465
466 struct rr_result { /* router renumbering result message */
467 u_int16_t rrr_flags;
468 u_int8_t rrr_ordinal;
469 u_int8_t rrr_matchedlen;
470 u_int32_t rrr_ifid;
471 struct in6_addr rrr_prefix;
472 };
473 /* network endian */
474 #define ICMP6_RR_RESULT_FLAGS_OOB ((u_int16_t)htons(0x0002))
475 #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN ((u_int16_t)htons(0x0001))
476
477 static const char *get_rtpref(u_int);
478 static const char *get_lifetime(u_int32_t);
479 static void print_lladdr(netdissect_options *ndo, const u_char *, size_t);
480 static void icmp6_opt_print(netdissect_options *ndo, const u_char *, int);
481 static void mld6_print(netdissect_options *ndo, const u_char *);
482 static void mldv2_report_print(netdissect_options *ndo, const u_char *, u_int);
483 static void mldv2_query_print(netdissect_options *ndo, const u_char *, u_int);
484 static struct udphdr *get_upperlayer(netdissect_options *ndo, u_char *, u_int *);
485 static void dnsname_print(netdissect_options *ndo, const u_char *, const u_char *);
486 static void icmp6_nodeinfo_print(netdissect_options *ndo, u_int, const u_char *, const u_char *);
487 static void icmp6_rrenum_print(netdissect_options *ndo, const u_char *, const u_char *);
488
489 #ifndef abs
490 #define abs(a) ((0 < (a)) ? (a) : -(a))
491 #endif
492
493 /* inline the various RPL definitions */
494 #define ND_RPL_MESSAGE 0x9B
495
496 static const struct tok icmp6_type_values[] = {
497 { ICMP6_DST_UNREACH, "destination unreachable"},
498 { ICMP6_PACKET_TOO_BIG, "packet too big"},
499 { ICMP6_TIME_EXCEEDED, "time exceeded in-transit"},
500 { ICMP6_PARAM_PROB, "parameter problem"},
501 { ICMP6_ECHO_REQUEST, "echo request"},
502 { ICMP6_ECHO_REPLY, "echo reply"},
503 { MLD6_LISTENER_QUERY, "multicast listener query"},
504 { MLD6_LISTENER_REPORT, "multicast listener report"},
505 { MLD6_LISTENER_DONE, "multicast listener done"},
506 { ND_ROUTER_SOLICIT, "router solicitation"},
507 { ND_ROUTER_ADVERT, "router advertisement"},
508 { ND_NEIGHBOR_SOLICIT, "neighbor solicitation"},
509 { ND_NEIGHBOR_ADVERT, "neighbor advertisement"},
510 { ND_REDIRECT, "redirect"},
511 { ICMP6_ROUTER_RENUMBERING, "router renumbering"},
512 { IND_SOLICIT, "inverse neighbor solicitation"},
513 { IND_ADVERT, "inverse neighbor advertisement"},
514 { MLDV2_LISTENER_REPORT, "multicast listener report v2"},
515 { ICMP6_HADISCOV_REQUEST, "ha discovery request"},
516 { ICMP6_HADISCOV_REPLY, "ha discovery reply"},
517 { ICMP6_MOBILEPREFIX_SOLICIT, "mobile router solicitation"},
518 { ICMP6_MOBILEPREFIX_ADVERT, "mobile router advertisement"},
519 { ICMP6_WRUREQUEST, "who-are-you request"},
520 { ICMP6_WRUREPLY, "who-are-you reply"},
521 { ICMP6_NI_QUERY, "node information query"},
522 { ICMP6_NI_REPLY, "node information reply"},
523 { MLD6_MTRACE, "mtrace message"},
524 { MLD6_MTRACE_RESP, "mtrace response"},
525 { ND_RPL_MESSAGE, "RPL"},
526 { 0, NULL }
527 };
528
529 static const struct tok icmp6_dst_unreach_code_values[] = {
530 { ICMP6_DST_UNREACH_NOROUTE, "unreachable route" },
531 { ICMP6_DST_UNREACH_ADMIN, " unreachable prohibited"},
532 { ICMP6_DST_UNREACH_BEYONDSCOPE, "beyond scope"},
533 { ICMP6_DST_UNREACH_ADDR, "unreachable address"},
534 { ICMP6_DST_UNREACH_NOPORT, "unreachable port"},
535 { 0, NULL }
536 };
537
538 static const struct tok icmp6_opt_pi_flag_values[] = {
539 { ND_OPT_PI_FLAG_ONLINK, "onlink" },
540 { ND_OPT_PI_FLAG_AUTO, "auto" },
541 { ND_OPT_PI_FLAG_ROUTER, "router" },
542 { 0, NULL }
543 };
544
545 static const struct tok icmp6_opt_ra_flag_values[] = {
546 { ND_RA_FLAG_MANAGED, "managed" },
547 { ND_RA_FLAG_OTHER, "other stateful"},
548 { ND_RA_FLAG_HOME_AGENT, "home agent"},
549 { 0, NULL }
550 };
551
552 static const struct tok icmp6_nd_na_flag_values[] = {
553 { ND_NA_FLAG_ROUTER, "router" },
554 { ND_NA_FLAG_SOLICITED, "solicited" },
555 { ND_NA_FLAG_OVERRIDE, "override" },
556 { 0, NULL }
557 };
558
559
560 static const struct tok icmp6_opt_values[] = {
561 { ND_OPT_SOURCE_LINKADDR, "source link-address"},
562 { ND_OPT_TARGET_LINKADDR, "destination link-address"},
563 { ND_OPT_PREFIX_INFORMATION, "prefix info"},
564 { ND_OPT_REDIRECTED_HEADER, "redirected header"},
565 { ND_OPT_MTU, "mtu"},
566 { ND_OPT_RDNSS, "rdnss"},
567 { ND_OPT_DNSSL, "dnssl"},
568 { ND_OPT_ADVINTERVAL, "advertisement interval"},
569 { ND_OPT_HOMEAGENT_INFO, "homeagent information"},
570 { ND_OPT_ROUTE_INFO, "route info"},
571 { 0, NULL }
572 };
573
574 /* mldv2 report types */
575 static const struct tok mldv2report2str[] = {
576 { 1, "is_in" },
577 { 2, "is_ex" },
578 { 3, "to_in" },
579 { 4, "to_ex" },
580 { 5, "allow" },
581 { 6, "block" },
582 { 0, NULL }
583 };
584
585 static const char *
586 get_rtpref(u_int v)
587 {
588 static const char *rtpref_str[] = {
589 "medium", /* 00 */
590 "high", /* 01 */
591 "rsv", /* 10 */
592 "low" /* 11 */
593 };
594
595 return rtpref_str[((v & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff];
596 }
597
598 static const char *
599 get_lifetime(u_int32_t v)
600 {
601 static char buf[20];
602
603 if (v == (u_int32_t)~0UL)
604 return "infinity";
605 else {
606 snprintf(buf, sizeof(buf), "%us", v);
607 return buf;
608 }
609 }
610
611 static void
612 print_lladdr(netdissect_options *ndo, const u_int8_t *p, size_t l)
613 {
614 const u_int8_t *ep, *q;
615
616 q = p;
617 ep = p + l;
618 while (l > 0 && q < ep) {
619 if (q > p)
620 ND_PRINT((ndo,":"));
621 ND_PRINT((ndo,"%02x", *q++));
622 l--;
623 }
624 }
625
626 static int icmp6_cksum(const struct ip6_hdr *ip6, const struct icmp6_hdr *icp,
627 u_int len)
628 {
629 return (nextproto6_cksum(ip6, (const u_int8_t *)(void *)icp, len,
630 IPPROTO_ICMPV6));
631 }
632
633 enum ND_RPL_CODE {
634 ND_RPL_DIS =0x00,
635 ND_RPL_DIO =0x01,
636 ND_RPL_DAO =0x02,
637 ND_RPL_DAO_ACK=0x03,
638 ND_RPL_SDIS =0x80,
639 ND_RPL_SDIO =0x81,
640 ND_RPL_SDAO =0x82,
641 ND_RPL_SDAO_ACK=0x83,
642 ND_RPL_SCC =0x8A,
643 };
644
645 enum ND_RPL_DIO_FLAGS {
646 ND_RPL_DIO_GROUNDED = 0x80,
647 ND_RPL_DIO_DATRIG = 0x40,
648 ND_RPL_DIO_DASUPPORT= 0x20,
649 ND_RPL_DIO_RES4 = 0x10,
650 ND_RPL_DIO_RES3 = 0x08,
651 ND_RPL_DIO_PRF_MASK = 0x07, /* 3-bit preference */
652 };
653
654 enum ND_RPL_SUBOPT {
655 RPL_OPT_PAD0 = 0,
656 RPL_OPT_PADN = 1,
657 RPL_DIO_METRICS = 2,
658 RPL_DIO_ROUTINGINFO = 3,
659 RPL_DIO_CONFIG = 4,
660 RPL_DAO_RPLTARGET = 5,
661 RPL_DAO_TRANSITINFO = 6,
662 RPL_DIO_DESTPREFIX = 8,
663 RPL_DAO_RPLTARGET_DESC=9,
664 };
665
666 #define RPL_DIO_GROUND_FLAG 0x80
667 #define RPL_DIO_MOP_SHIFT 3
668 #define RPL_DIO_MOP_MASK (7 << RPL_DIO_MOP_SHIFT)
669 #define RPL_DIO_PRF_SHIFT 0
670 #define RPL_DIO_PRF_MASK (7 << RPL_DIO_MOP_SHIFT)
671 #define RPL_DIO_GROUNDED(X) ((X)&RPL_DIO_GROUND_FLAG)
672 #define RPL_DIO_MOP(X) (((X)&RPL_DIO_MOP_MASK) >> RPL_DIO_MOP_SHIFT)
673 #define RPL_DIO_PRF(X) (((X)&RPL_DIO_PRF_MASK) >> RPL_DIO_PRF_SHIFT)
674
675
676 struct nd_rpl_dio {
677 u_int8_t rpl_instanceid;
678 u_int8_t rpl_version;
679 u_int16_t rpl_dagrank;
680 u_int8_t rpl_mopprf; /* bit 7=G, 5-3=MOP, 2-0=PRF */
681 u_int8_t rpl_dtsn;
682 u_int8_t rpl_flags; /* Dest. Advertisement Trigger Seq Number */
683 u_int8_t rpl_resv1;
684 u_int8_t rpl_dagid[16];
685 };
686 struct nd_rpl_option {
687 u_int8_t rpl_dio_type;
688 u_int8_t rpl_dio_len; /* suboption length, not including type/len */
689 u_int8_t rpl_dio_data[0];
690 };
691
692 static char *rpl_mop_name[]={
693 "nonstoring",
694 "storing",
695 "nonstoring-multicast",
696 "storing-multicast",
697 "mop-reserved-4",
698 "mop-reserved-5",
699 "mop-reserved-6",
700 "mop-reserved-7"
701 };
702
703 static char *rpl_subopt_name(int opt, char *buf, int len) {
704 switch(opt) {
705 case RPL_OPT_PAD0:
706 return "pad0";
707 case RPL_OPT_PADN:
708 return "padN";
709 case RPL_DIO_METRICS:
710 return "metrics";
711 case RPL_DIO_ROUTINGINFO:
712 return "routinginfo";
713 case RPL_DIO_CONFIG:
714 return "routinginfo";
715 case RPL_DAO_RPLTARGET:
716 return "rpltarget";
717 case RPL_DAO_TRANSITINFO:
718 return "transitinfo";
719 case RPL_DIO_DESTPREFIX:
720 return "destprefix";
721 case RPL_DAO_RPLTARGET_DESC:
722 return "rpltargetdesc";
723 default:
724 snprintf(buf, len, "unknown:%u", opt);
725 return buf;
726 }
727 }
728
729 static void
730 rpl_dio_print(netdissect_options *ndo,
731 const struct icmp6_hdr *hdr,
732 const u_char *bp, u_int length)
733 {
734 struct nd_rpl_dio *dio = (struct nd_rpl_dio *)bp;
735 char dagid[65];
736 char *d = dagid;
737 int i;
738 ND_TCHECK(dio->rpl_dagid);
739
740 for(i=0;i<16;i++) {
741 if(isprint(dio->rpl_dagid[i])) {
742 *d++ = dio->rpl_dagid[i];
743 } else {
744 int cnt=snprintf(d,4,"0x%02x",
745 dio->rpl_dagid[i]);
746 d += cnt;
747 }
748 }
749 *d++ = '\0';
750 ND_PRINT((ndo, " [dagid:%s,seq:%u,instance:%u,rank:%u,%smop:%s,prf:%u]",
751 dagid,
752 dio->rpl_dtsn,
753 dio->rpl_instanceid,
754 dio->rpl_dagrank,
755 RPL_DIO_GROUNDED(dio->rpl_mopprf) ? "grounded,":"",
756 rpl_mop_name[RPL_DIO_MOP(dio->rpl_mopprf)],
757 RPL_DIO_PRF(dio->rpl_mopprf)));
758
759 if(ndo->ndo_vflag > 1) {
760 struct nd_rpl_option *opt = (struct nd_rpl_option *)&dio[1];
761 length -= sizeof(struct nd_rpl_dio);
762 char optname_buf[64];
763 ND_TCHECK(opt->rpl_dio_len);
764 while((opt->rpl_dio_type == RPL_OPT_PAD0 &&
765 (u_char *)opt < ndo->ndo_snapend) ||
766 ND_TTEST2(*opt,(opt->rpl_dio_len+2))) {
767 unsigned int len = opt->rpl_dio_len+2;
768 if(opt->rpl_dio_type == RPL_OPT_PAD0) {
769 len = 1;
770 ND_PRINT((ndo, " opt:pad0"));
771 } else {
772 ND_PRINT((ndo, " opt:%s len:%u ",
773 rpl_subopt_name(opt->rpl_dio_type, optname_buf, sizeof(optname_buf)),
774 len));
775 if(ndo->ndo_vflag > 2) {
776 int len = opt->rpl_dio_len;
777 if(len > length) len = length;
778 hex_print(ndo,
779 " ",
780 (char *)&opt[1], /* content of DIO option */
781 len);
782 }
783 }
784 opt = (struct nd_rpl_option *)(((char *)opt) + len);
785 length -= len;
786 }
787 }
788 return;
789 trunc:
790 ND_PRINT((ndo," [|truncated]"));
791 return;
792 }
793
794 static void
795 rpl_print(netdissect_options *ndo,
796 const struct icmp6_hdr *hdr,
797 const u_char *bp, u_int length)
798 {
799 int secured = hdr->icmp6_code & 0x80;
800 int basecode= hdr->icmp6_code & 0x7f;
801
802 if(secured) {
803 ND_PRINT((ndo, ", (SEC)"));
804 } else {
805 ND_PRINT((ndo, ", (CLR)"));
806 }
807
808 switch(basecode) {
809 case ND_RPL_DIS:
810 ND_PRINT((ndo, "DODAG Information Solicitation"));
811 if(ndo->ndo_vflag) {
812 }
813 break;
814 case ND_RPL_DIO:
815 ND_PRINT((ndo, "DODAG Information Object"));
816 if(ndo->ndo_vflag) {
817 rpl_dio_print(ndo, hdr, bp, length);
818 }
819 break;
820 case ND_RPL_DAO:
821 ND_PRINT((ndo, "Destination Advertisement Object"));
822 if(ndo->ndo_vflag) {
823 }
824 break;
825 case ND_RPL_DAO_ACK:
826 ND_PRINT((ndo, "Destination Advertisement Object Ack"));
827 if(ndo->ndo_vflag) {
828 }
829 break;
830 default:
831 ND_PRINT((ndo, "RPL message, unknown code %u",hdr->icmp6_code));
832 break;
833 }
834 return;
835 trunc:
836 ND_PRINT((ndo," [|truncated]"));
837 return;
838
839 }
840
841
842 void
843 icmp6_print(netdissect_options *ndo,
844 const u_char *bp, u_int length, const u_char *bp2, int fragmented)
845 {
846 const struct icmp6_hdr *dp;
847 const struct ip6_hdr *ip;
848 const struct ip6_hdr *oip;
849 const struct udphdr *ouh;
850 int dport;
851 const u_char *ep;
852 u_int prot;
853
854 dp = (struct icmp6_hdr *)bp;
855 ip = (struct ip6_hdr *)bp2;
856 oip = (struct ip6_hdr *)(dp + 1);
857 /* 'ep' points to the end of available data. */
858 ep = ndo->ndo_snapend;
859
860 ND_TCHECK(dp->icmp6_cksum);
861
862 if (ndo->ndo_vflag && !fragmented) {
863 u_int16_t sum, udp_sum;
864
865 if (ND_TTEST2(bp[0], length)) {
866 udp_sum = EXTRACT_16BITS(&dp->icmp6_cksum);
867 sum = icmp6_cksum(ip, dp, length);
868 if (sum != 0)
869 (void)ND_PRINT((ndo,"[bad icmp6 cksum 0x%04x -> 0x%04x!] ",
870 udp_sum,
871 in_cksum_shouldbe(udp_sum, sum)));
872 else
873 (void)ND_PRINT((ndo,"[icmp6 sum ok] "));
874 }
875 }
876
877 ND_PRINT((ndo,"ICMP6, %s", tok2str(icmp6_type_values,"unknown icmp6 type (%u)",dp->icmp6_type)));
878
879 /* display cosmetics: print the packet length for printer that use the vflag now */
880 if (ndo->ndo_vflag && (dp->icmp6_type == ND_ROUTER_SOLICIT ||
881 dp->icmp6_type == ND_ROUTER_ADVERT ||
882 dp->icmp6_type == ND_NEIGHBOR_ADVERT ||
883 dp->icmp6_type == ND_NEIGHBOR_SOLICIT ||
884 dp->icmp6_type == ND_REDIRECT ||
885 dp->icmp6_type == ICMP6_HADISCOV_REPLY ||
886 dp->icmp6_type == ICMP6_MOBILEPREFIX_ADVERT ))
887 ND_PRINT((ndo,", length %u", length));
888
889 switch (dp->icmp6_type) {
890 case ICMP6_DST_UNREACH:
891 ND_TCHECK(oip->ip6_dst);
892 ND_PRINT((ndo,", %s", tok2str(icmp6_dst_unreach_code_values,"unknown unreach code (%u)",dp->icmp6_code)));
893 switch (dp->icmp6_code) {
894
895 case ICMP6_DST_UNREACH_NOROUTE: /* fall through */
896 case ICMP6_DST_UNREACH_ADMIN:
897 case ICMP6_DST_UNREACH_ADDR:
898 ND_PRINT((ndo," %s",ip6addr_string(&oip->ip6_dst)));
899 break;
900 case ICMP6_DST_UNREACH_BEYONDSCOPE:
901 ND_PRINT((ndo," %s, source address %s",
902 ip6addr_string(&oip->ip6_dst),
903 ip6addr_string(&oip->ip6_src)));
904 break;
905 case ICMP6_DST_UNREACH_NOPORT:
906 if ((ouh = get_upperlayer(ndo, (u_char *)oip, &prot))
907 == NULL)
908 goto trunc;
909
910 dport = EXTRACT_16BITS(&ouh->uh_dport);
911 switch (prot) {
912 case IPPROTO_TCP:
913 ND_PRINT((ndo,", %s tcp port %s",
914 ip6addr_string(&oip->ip6_dst),
915 tcpport_string(dport)));
916 break;
917 case IPPROTO_UDP:
918 ND_PRINT((ndo,", %s udp port %s",
919 ip6addr_string(&oip->ip6_dst),
920 udpport_string(dport)));
921 break;
922 default:
923 ND_PRINT((ndo,", %s protocol %d port %d unreachable",
924 ip6addr_string(&oip->ip6_dst),
925 oip->ip6_nxt, dport));
926 break;
927 }
928 break;
929 default:
930 if (ndo->ndo_vflag <= 1) {
931 print_unknown_data(ndo, bp,"\n\t",length);
932 return;
933 }
934 break;
935 }
936 break;
937 case ICMP6_PACKET_TOO_BIG:
938 ND_TCHECK(dp->icmp6_mtu);
939 ND_PRINT((ndo,", mtu %u", EXTRACT_32BITS(&dp->icmp6_mtu)));
940 break;
941 case ICMP6_TIME_EXCEEDED:
942 ND_TCHECK(oip->ip6_dst);
943 switch (dp->icmp6_code) {
944 case ICMP6_TIME_EXCEED_TRANSIT:
945 ND_PRINT((ndo," for %s",
946 ip6addr_string(&oip->ip6_dst)));
947 break;
948 case ICMP6_TIME_EXCEED_REASSEMBLY:
949 ND_PRINT((ndo," (reassembly)"));
950 break;
951 default:
952 ND_PRINT((ndo,", unknown code (%u)", dp->icmp6_code));
953 break;
954 }
955 break;
956 case ICMP6_PARAM_PROB:
957 ND_TCHECK(oip->ip6_dst);
958 switch (dp->icmp6_code) {
959 case ICMP6_PARAMPROB_HEADER:
960 ND_PRINT((ndo,", erroneous - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)));
961 break;
962 case ICMP6_PARAMPROB_NEXTHEADER:
963 ND_PRINT((ndo,", next header - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)));
964 break;
965 case ICMP6_PARAMPROB_OPTION:
966 ND_PRINT((ndo,", option - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)));
967 break;
968 default:
969 ND_PRINT((ndo,", code-#%d",
970 dp->icmp6_code));
971 break;
972 }
973 break;
974 case ICMP6_ECHO_REQUEST:
975 case ICMP6_ECHO_REPLY:
976 ND_TCHECK(dp->icmp6_seq);
977 ND_PRINT((ndo,", seq %u", EXTRACT_16BITS(&dp->icmp6_seq)));
978 break;
979 case ICMP6_MEMBERSHIP_QUERY:
980 if (length == MLD_MINLEN) {
981 mld6_print(ndo, (const u_char *)dp);
982 } else if (length >= MLDV2_MINLEN) {
983 ND_PRINT((ndo," v2"));
984 mldv2_query_print(ndo, (const u_char *)dp, length);
985 } else {
986 ND_PRINT((ndo," unknown-version (len %u) ", length));
987 }
988 break;
989 case ICMP6_MEMBERSHIP_REPORT:
990 mld6_print(ndo, (const u_char *)dp);
991 break;
992 case ICMP6_MEMBERSHIP_REDUCTION:
993 mld6_print(ndo, (const u_char *)dp);
994 break;
995 case ND_ROUTER_SOLICIT:
996 #define RTSOLLEN 8
997 if (ndo->ndo_vflag) {
998 icmp6_opt_print(ndo, (const u_char *)dp + RTSOLLEN,
999 length - RTSOLLEN);
1000 }
1001 break;
1002 case ND_ROUTER_ADVERT:
1003 #define RTADVLEN 16
1004 if (ndo->ndo_vflag) {
1005 struct nd_router_advert *p;
1006
1007 p = (struct nd_router_advert *)dp;
1008 ND_TCHECK(p->nd_ra_retransmit);
1009 ND_PRINT((ndo,"\n\thop limit %u, Flags [%s]" \
1010 ", pref %s, router lifetime %us, reachable time %us, retrans time %us",
1011 (u_int)p->nd_ra_curhoplimit,
1012 bittok2str(icmp6_opt_ra_flag_values,"none",(p->nd_ra_flags_reserved)),
1013 get_rtpref(p->nd_ra_flags_reserved),
1014 EXTRACT_16BITS(&p->nd_ra_router_lifetime),
1015 EXTRACT_32BITS(&p->nd_ra_reachable),
1016 EXTRACT_32BITS(&p->nd_ra_retransmit)));
1017
1018 icmp6_opt_print(ndo, (const u_char *)dp + RTADVLEN,
1019 length - RTADVLEN);
1020 }
1021 break;
1022 case ND_NEIGHBOR_SOLICIT:
1023 {
1024 struct nd_neighbor_solicit *p;
1025 p = (struct nd_neighbor_solicit *)dp;
1026 ND_TCHECK(p->nd_ns_target);
1027 ND_PRINT((ndo,", who has %s", ip6addr_string(&p->nd_ns_target)));
1028 if (ndo->ndo_vflag) {
1029 #define NDSOLLEN 24
1030 icmp6_opt_print(ndo, (const u_char *)dp + NDSOLLEN,
1031 length - NDSOLLEN);
1032 }
1033 }
1034 break;
1035 case ND_NEIGHBOR_ADVERT:
1036 {
1037 struct nd_neighbor_advert *p;
1038
1039 p = (struct nd_neighbor_advert *)dp;
1040 ND_TCHECK(p->nd_na_target);
1041 ND_PRINT((ndo,", tgt is %s",
1042 ip6addr_string(&p->nd_na_target)));
1043 if (ndo->ndo_vflag) {
1044 ND_PRINT((ndo,", Flags [%s]",
1045 bittok2str(icmp6_nd_na_flag_values,
1046 "none",
1047 EXTRACT_32BITS(&p->nd_na_flags_reserved))));
1048 #define NDADVLEN 24
1049 icmp6_opt_print(ndo, (const u_char *)dp + NDADVLEN,
1050 length - NDADVLEN);
1051 #undef NDADVLEN
1052 }
1053 }
1054 break;
1055 case ND_REDIRECT:
1056 #define RDR(i) ((struct nd_redirect *)(i))
1057 ND_TCHECK(RDR(dp)->nd_rd_dst);
1058 ND_PRINT((ndo,", %s", getname6((const u_char *)&RDR(dp)->nd_rd_dst)));
1059 ND_TCHECK(RDR(dp)->nd_rd_target);
1060 ND_PRINT((ndo," to %s",
1061 getname6((const u_char*)&RDR(dp)->nd_rd_target)));
1062 #define REDIRECTLEN 40
1063 if (ndo->ndo_vflag) {
1064 icmp6_opt_print(ndo, (const u_char *)dp + REDIRECTLEN,
1065 length - REDIRECTLEN);
1066 }
1067 break;
1068 #undef REDIRECTLEN
1069 #undef RDR
1070 case ICMP6_ROUTER_RENUMBERING:
1071 icmp6_rrenum_print(ndo, bp, ep);
1072 break;
1073 case ICMP6_NI_QUERY:
1074 case ICMP6_NI_REPLY:
1075 icmp6_nodeinfo_print(ndo, length, bp, ep);
1076 break;
1077 case IND_SOLICIT:
1078 case IND_ADVERT:
1079 break;
1080 case ICMP6_V2_MEMBERSHIP_REPORT:
1081 mldv2_report_print(ndo, (const u_char *) dp, length);
1082 break;
1083 case ICMP6_MOBILEPREFIX_SOLICIT: /* fall through */
1084 case ICMP6_HADISCOV_REQUEST:
1085 ND_TCHECK(dp->icmp6_data16[0]);
1086 ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])));
1087 break;
1088 case ICMP6_HADISCOV_REPLY:
1089 if (ndo->ndo_vflag) {
1090 struct in6_addr *in6;
1091 u_char *cp;
1092
1093 ND_TCHECK(dp->icmp6_data16[0]);
1094 ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])));
1095 cp = (u_char *)dp + length;
1096 in6 = (struct in6_addr *)(dp + 1);
1097 for (; (u_char *)in6 < cp; in6++) {
1098 ND_TCHECK(*in6);
1099 ND_PRINT((ndo,", %s", ip6addr_string(in6)));
1100 }
1101 }
1102 break;
1103 case ICMP6_MOBILEPREFIX_ADVERT:
1104 if (ndo->ndo_vflag) {
1105 ND_TCHECK(dp->icmp6_data16[0]);
1106 ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])));
1107 if (dp->icmp6_data16[1] & 0xc0)
1108 ND_PRINT((ndo," "));
1109 if (dp->icmp6_data16[1] & 0x80)
1110 ND_PRINT((ndo,"M"));
1111 if (dp->icmp6_data16[1] & 0x40)
1112 ND_PRINT((ndo,"O"));
1113 #define MPADVLEN 8
1114 icmp6_opt_print(ndo, (const u_char *)dp + MPADVLEN,
1115 length - MPADVLEN);
1116 }
1117 break;
1118 case ND_RPL_MESSAGE:
1119 rpl_print(ndo, dp, &dp->icmp6_data8[0], length);
1120 break;
1121 default:
1122 ND_PRINT((ndo,", length %u", length));
1123 if (ndo->ndo_vflag <= 1)
1124 print_unknown_data(ndo, bp,"\n\t", length);
1125 return;
1126 }
1127 if (!ndo->ndo_vflag)
1128 ND_PRINT((ndo,", length %u", length));
1129 return;
1130 trunc:
1131 ND_PRINT((ndo, "[|icmp6]"));
1132 }
1133
1134 static struct udphdr *
1135 get_upperlayer(netdissect_options *ndo, u_char *bp, u_int *prot)
1136 {
1137 const u_char *ep;
1138 struct ip6_hdr *ip6 = (struct ip6_hdr *)bp;
1139 struct udphdr *uh;
1140 struct ip6_hbh *hbh;
1141 struct ip6_frag *fragh;
1142 struct ah *ah;
1143 u_int nh;
1144 int hlen;
1145
1146 /* 'ep' points to the end of available data. */
1147 ep = ndo->ndo_snapend;
1148
1149 if (!ND_TTEST(ip6->ip6_nxt))
1150 return NULL;
1151
1152 nh = ip6->ip6_nxt;
1153 hlen = sizeof(struct ip6_hdr);
1154
1155 while (bp < ep) {
1156 bp += hlen;
1157
1158 switch(nh) {
1159 case IPPROTO_UDP:
1160 case IPPROTO_TCP:
1161 uh = (struct udphdr *)bp;
1162 if (ND_TTEST(uh->uh_dport)) {
1163 *prot = nh;
1164 return(uh);
1165 }
1166 else
1167 return(NULL);
1168 /* NOTREACHED */
1169
1170 case IPPROTO_HOPOPTS:
1171 case IPPROTO_DSTOPTS:
1172 case IPPROTO_ROUTING:
1173 hbh = (struct ip6_hbh *)bp;
1174 if (!ND_TTEST(hbh->ip6h_len))
1175 return(NULL);
1176 nh = hbh->ip6h_nxt;
1177 hlen = (hbh->ip6h_len + 1) << 3;
1178 break;
1179
1180 case IPPROTO_FRAGMENT: /* this should be odd, but try anyway */
1181 fragh = (struct ip6_frag *)bp;
1182 if (!ND_TTEST(fragh->ip6f_offlg))
1183 return(NULL);
1184 /* fragments with non-zero offset are meaningless */
1185 if ((EXTRACT_16BITS(&fragh->ip6f_offlg) & IP6F_OFF_MASK) != 0)
1186 return(NULL);
1187 nh = fragh->ip6f_nxt;
1188 hlen = sizeof(struct ip6_frag);
1189 break;
1190
1191 case IPPROTO_AH:
1192 ah = (struct ah *)bp;
1193 if (!ND_TTEST(ah->ah_len))
1194 return(NULL);
1195 nh = ah->ah_nxt;
1196 hlen = (ah->ah_len + 2) << 2;
1197 break;
1198
1199 default: /* unknown or undecodable header */
1200 *prot = nh; /* meaningless, but set here anyway */
1201 return(NULL);
1202 }
1203 }
1204
1205 return(NULL); /* should be notreached, though */
1206 }
1207
1208 static void
1209 icmp6_opt_print(netdissect_options *ndo, const u_char *bp, int resid)
1210 {
1211 const struct nd_opt_hdr *op;
1212 const struct nd_opt_prefix_info *opp;
1213 const struct nd_opt_mtu *opm;
1214 const struct nd_opt_rdnss *oprd;
1215 const struct nd_opt_dnssl *opds;
1216 const struct nd_opt_advinterval *opa;
1217 const struct nd_opt_homeagent_info *oph;
1218 const struct nd_opt_route_info *opri;
1219 const u_char *cp, *ep, *domp;
1220 struct in6_addr in6, *in6p;
1221 size_t l;
1222 u_int i;
1223
1224 #define ECHECK(var) if ((u_char *)&(var) > ep - sizeof(var)) return
1225
1226 cp = bp;
1227 /* 'ep' points to the end of available data. */
1228 ep = ndo->ndo_snapend;
1229
1230 while (cp < ep) {
1231 op = (struct nd_opt_hdr *)cp;
1232
1233 ECHECK(op->nd_opt_len);
1234 if (resid <= 0)
1235 return;
1236 if (op->nd_opt_len == 0)
1237 goto trunc;
1238 if (cp + (op->nd_opt_len << 3) > ep)
1239 goto trunc;
1240
1241 ND_PRINT((ndo,"\n\t %s option (%u), length %u (%u): ",
1242 tok2str(icmp6_opt_values, "unknown", op->nd_opt_type),
1243 op->nd_opt_type,
1244 op->nd_opt_len << 3,
1245 op->nd_opt_len));
1246
1247 switch (op->nd_opt_type) {
1248 case ND_OPT_SOURCE_LINKADDR:
1249 l = (op->nd_opt_len << 3) - 2;
1250 print_lladdr(ndo, cp + 2, l);
1251 break;
1252 case ND_OPT_TARGET_LINKADDR:
1253 l = (op->nd_opt_len << 3) - 2;
1254 print_lladdr(ndo, cp + 2, l);
1255 break;
1256 case ND_OPT_PREFIX_INFORMATION:
1257 opp = (struct nd_opt_prefix_info *)op;
1258 ND_TCHECK(opp->nd_opt_pi_prefix);
1259 ND_PRINT((ndo,"%s/%u%s, Flags [%s], valid time %s",
1260 ip6addr_string(&opp->nd_opt_pi_prefix),
1261 opp->nd_opt_pi_prefix_len,
1262 (op->nd_opt_len != 4) ? "badlen" : "",
1263 bittok2str(icmp6_opt_pi_flag_values, "none", opp->nd_opt_pi_flags_reserved),
1264 get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_valid_time))));
1265 ND_PRINT((ndo,", pref. time %s", get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_preferred_time))));
1266 break;
1267 case ND_OPT_REDIRECTED_HEADER:
1268 print_unknown_data(ndo, bp,"\n\t ",op->nd_opt_len<<3);
1269 /* xxx */
1270 break;
1271 case ND_OPT_MTU:
1272 opm = (struct nd_opt_mtu *)op;
1273 ND_TCHECK(opm->nd_opt_mtu_mtu);
1274 ND_PRINT((ndo," %u%s",
1275 EXTRACT_32BITS(&opm->nd_opt_mtu_mtu),
1276 (op->nd_opt_len != 1) ? "bad option length" : "" ));
1277 break;
1278 case ND_OPT_RDNSS:
1279 oprd = (struct nd_opt_rdnss *)op;
1280 l = (op->nd_opt_len - 1) / 2;
1281 ND_PRINT((ndo," lifetime %us,",
1282 EXTRACT_32BITS(&oprd->nd_opt_rdnss_lifetime)));
1283 for (i = 0; i < l; i++) {
1284 ND_TCHECK(oprd->nd_opt_rdnss_addr[i]);
1285 ND_PRINT((ndo," addr: %s",
1286 ip6addr_string(&oprd->nd_opt_rdnss_addr[i])));
1287 }
1288 break;
1289 case ND_OPT_DNSSL:
1290 opds = (struct nd_opt_dnssl *)op;
1291 ND_PRINT((ndo," lifetime %us, domain(s):",
1292 EXTRACT_32BITS(&opds->nd_opt_dnssl_lifetime)));
1293 domp = cp + 8; /* domain names, variable-sized, RFC1035-encoded */
1294 while (domp < cp + (op->nd_opt_len << 3) && *domp != '\0')
1295 {
1296 printf (" ");
1297 if ((domp = ns_nprint (domp, bp)) == NULL)
1298 goto trunc;
1299 }
1300 break;
1301 case ND_OPT_ADVINTERVAL:
1302 opa = (struct nd_opt_advinterval *)op;
1303 ND_TCHECK(opa->nd_opt_adv_interval);
1304 ND_PRINT((ndo," %ums", EXTRACT_32BITS(&opa->nd_opt_adv_interval)));
1305 break;
1306 case ND_OPT_HOMEAGENT_INFO:
1307 oph = (struct nd_opt_homeagent_info *)op;
1308 ND_TCHECK(oph->nd_opt_hai_lifetime);
1309 ND_PRINT((ndo," preference %u, lifetime %u",
1310 EXTRACT_16BITS(&oph->nd_opt_hai_preference),
1311 EXTRACT_16BITS(&oph->nd_opt_hai_lifetime)));
1312 break;
1313 case ND_OPT_ROUTE_INFO:
1314 opri = (struct nd_opt_route_info *)op;
1315 ND_TCHECK(opri->nd_opt_rti_lifetime);
1316 memset(&in6, 0, sizeof(in6));
1317 in6p = (struct in6_addr *)(opri + 1);
1318 switch (op->nd_opt_len) {
1319 case 1:
1320 break;
1321 case 2:
1322 ND_TCHECK2(*in6p, 8);
1323 memcpy(&in6, opri + 1, 8);
1324 break;
1325 case 3:
1326 ND_TCHECK(*in6p);
1327 memcpy(&in6, opri + 1, sizeof(in6));
1328 break;
1329 default:
1330 goto trunc;
1331 }
1332 ND_PRINT((ndo," %s/%u", ip6addr_string(&in6),
1333 opri->nd_opt_rti_prefixlen));
1334 ND_PRINT((ndo,", pref=%s", get_rtpref(opri->nd_opt_rti_flags)));
1335 ND_PRINT((ndo,", lifetime=%s",
1336 get_lifetime(EXTRACT_32BITS(&opri->nd_opt_rti_lifetime))));
1337 break;
1338 default:
1339 if (ndo->ndo_vflag <= 1) {
1340 print_unknown_data(ndo,cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */
1341 return;
1342 }
1343 break;
1344 }
1345 /* do we want to see an additional hexdump ? */
1346 if (ndo->ndo_vflag> 1)
1347 print_unknown_data(ndo, cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */
1348
1349 cp += op->nd_opt_len << 3;
1350 resid -= op->nd_opt_len << 3;
1351 }
1352 return;
1353
1354 trunc:
1355 ND_PRINT((ndo, "[ndp opt]"));
1356 return;
1357 #undef ECHECK
1358 }
1359
1360 static void
1361 mld6_print(netdissect_options *ndo, const u_char *bp)
1362 {
1363 struct mld6_hdr *mp = (struct mld6_hdr *)bp;
1364 const u_char *ep;
1365
1366 /* 'ep' points to the end of available data. */
1367 ep = ndo->ndo_snapend;
1368
1369 if ((u_char *)mp + sizeof(*mp) > ep)
1370 return;
1371
1372 ND_PRINT((ndo,"max resp delay: %d ", EXTRACT_16BITS(&mp->mld6_maxdelay)));
1373 ND_PRINT((ndo,"addr: %s", ip6addr_string(&mp->mld6_addr)));
1374 }
1375
1376 static void
1377 mldv2_report_print(netdissect_options *ndo, const u_char *bp, u_int len)
1378 {
1379 struct icmp6_hdr *icp = (struct icmp6_hdr *) bp;
1380 u_int group, nsrcs, ngroups;
1381 u_int i, j;
1382
1383 /* Minimum len is 8 */
1384 if (len < 8) {
1385 ND_PRINT((ndo," [invalid len %d]", len));
1386 return;
1387 }
1388
1389 ND_TCHECK(icp->icmp6_data16[1]);
1390 ngroups = EXTRACT_16BITS(&icp->icmp6_data16[1]);
1391 ND_PRINT((ndo,", %d group record(s)", ngroups));
1392 if (ndo->ndo_vflag > 0) {
1393 /* Print the group records */
1394 group = 8;
1395 for (i = 0; i < ngroups; i++) {
1396 /* type(1) + auxlen(1) + numsrc(2) + grp(16) */
1397 if (len < group + 20) {
1398 ND_PRINT((ndo," [invalid number of groups]"));
1399 return;
1400 }
1401 ND_TCHECK2(bp[group + 4], sizeof(struct in6_addr));
1402 ND_PRINT((ndo," [gaddr %s", ip6addr_string(&bp[group + 4])));
1403 ND_PRINT((ndo," %s", tok2str(mldv2report2str, " [v2-report-#%d]",
1404 bp[group])));
1405 nsrcs = (bp[group + 2] << 8) + bp[group + 3];
1406 /* Check the number of sources and print them */
1407 if (len < group + 20 + (nsrcs * sizeof(struct in6_addr))) {
1408 ND_PRINT((ndo," [invalid number of sources %d]", nsrcs));
1409 return;
1410 }
1411 if (ndo->ndo_vflag == 1)
1412 ND_PRINT((ndo,", %d source(s)", nsrcs));
1413 else {
1414 /* Print the sources */
1415 (void)ND_PRINT((ndo," {"));
1416 for (j = 0; j < nsrcs; j++) {
1417 ND_TCHECK2(bp[group + 20 + j * sizeof(struct in6_addr)],
1418 sizeof(struct in6_addr));
1419 ND_PRINT((ndo," %s", ip6addr_string(&bp[group + 20 + j * sizeof(struct in6_addr)])));
1420 }
1421 (void)ND_PRINT((ndo," }"));
1422 }
1423 /* Next group record */
1424 group += 20 + nsrcs * sizeof(struct in6_addr);
1425 ND_PRINT((ndo,"]"));
1426 }
1427 }
1428 return;
1429 trunc:
1430 (void)ND_PRINT((ndo,"[|icmp6]"));
1431 return;
1432 }
1433
1434 static void
1435 mldv2_query_print(netdissect_options *ndo, const u_char *bp, u_int len)
1436 {
1437 struct icmp6_hdr *icp = (struct icmp6_hdr *) bp;
1438 u_int mrc;
1439 int mrt, qqi;
1440 u_int nsrcs;
1441 register u_int i;
1442
1443 /* Minimum len is 28 */
1444 if (len < 28) {
1445 ND_PRINT((ndo," [invalid len %d]", len));
1446 return;
1447 }
1448 ND_TCHECK(icp->icmp6_data16[0]);
1449 mrc = EXTRACT_16BITS(&icp->icmp6_data16[0]);
1450 if (mrc < 32768) {
1451 mrt = mrc;
1452 } else {
1453 mrt = ((mrc & 0x0fff) | 0x1000) << (((mrc & 0x7000) >> 12) + 3);
1454 }
1455 if (ndo->ndo_vflag) {
1456 (void)ND_PRINT((ndo," [max resp delay=%d]", mrt));
1457 }
1458 ND_TCHECK2(bp[8], sizeof(struct in6_addr));
1459 ND_PRINT((ndo," [gaddr %s", ip6addr_string(&bp[8])));
1460
1461 if (ndo->ndo_vflag) {
1462 ND_TCHECK(bp[25]);
1463 if (bp[24] & 0x08) {
1464 ND_PRINT((ndo," sflag"));
1465 }
1466 if (bp[24] & 0x07) {
1467 ND_PRINT((ndo," robustness=%d", bp[24] & 0x07));
1468 }
1469 if (bp[25] < 128) {
1470 qqi = bp[25];
1471 } else {
1472 qqi = ((bp[25] & 0x0f) | 0x10) << (((bp[25] & 0x70) >> 4) + 3);
1473 }
1474 ND_PRINT((ndo," qqi=%d", qqi));
1475 }
1476
1477 ND_TCHECK2(bp[26], 2);
1478 nsrcs = EXTRACT_16BITS(&bp[26]);
1479 if (nsrcs > 0) {
1480 if (len < 28 + nsrcs * sizeof(struct in6_addr))
1481 ND_PRINT((ndo," [invalid number of sources]"));
1482 else if (ndo->ndo_vflag > 1) {
1483 ND_PRINT((ndo," {"));
1484 for (i = 0; i < nsrcs; i++) {
1485 ND_TCHECK2(bp[28 + i * sizeof(struct in6_addr)],
1486 sizeof(struct in6_addr));
1487 ND_PRINT((ndo," %s", ip6addr_string(&bp[28 + i * sizeof(struct in6_addr)])));
1488 }
1489 ND_PRINT((ndo," }"));
1490 } else
1491 ND_PRINT((ndo,", %d source(s)", nsrcs));
1492 }
1493 ND_PRINT((ndo,"]"));
1494 return;
1495 trunc:
1496 (void)ND_PRINT((ndo,"[|icmp6]"));
1497 return;
1498 }
1499
1500 static void
1501 dnsname_print(netdissect_options *ndo, const u_char *cp, const u_char *ep)
1502 {
1503 int i;
1504
1505 /* DNS name decoding - no decompression */
1506 ND_PRINT((ndo,", \""));
1507 while (cp < ep) {
1508 i = *cp++;
1509 if (i) {
1510 if (i > ep - cp) {
1511 ND_PRINT((ndo,"???"));
1512 break;
1513 }
1514 while (i-- && cp < ep) {
1515 safeputchar(*cp);
1516 cp++;
1517 }
1518 if (cp + 1 < ep && *cp)
1519 ND_PRINT((ndo,"."));
1520 } else {
1521 if (cp == ep) {
1522 /* FQDN */
1523 ND_PRINT((ndo,"."));
1524 } else if (cp + 1 == ep && *cp == '\0') {
1525 /* truncated */
1526 } else {
1527 /* invalid */
1528 ND_PRINT((ndo,"???"));
1529 }
1530 break;
1531 }
1532 }
1533 ND_PRINT((ndo,"\""));
1534 }
1535
1536 static void
1537 icmp6_nodeinfo_print(netdissect_options *ndo, u_int icmp6len, const u_char *bp, const u_char *ep)
1538 {
1539 struct icmp6_nodeinfo *ni6;
1540 struct icmp6_hdr *dp;
1541 const u_char *cp;
1542 size_t siz, i;
1543 int needcomma;
1544
1545 if (ep < bp)
1546 return;
1547 dp = (struct icmp6_hdr *)bp;
1548 ni6 = (struct icmp6_nodeinfo *)bp;
1549 siz = ep - bp;
1550
1551 switch (ni6->ni_type) {
1552 case ICMP6_NI_QUERY:
1553 if (siz == sizeof(*dp) + 4) {
1554 /* KAME who-are-you */
1555 ND_PRINT((ndo," who-are-you request"));
1556 break;
1557 }
1558 ND_PRINT((ndo," node information query"));
1559
1560 ND_TCHECK2(*dp, sizeof(*ni6));
1561 ni6 = (struct icmp6_nodeinfo *)dp;
1562 ND_PRINT((ndo," (")); /*)*/
1563 switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
1564 case NI_QTYPE_NOOP:
1565 ND_PRINT((ndo,"noop"));
1566 break;
1567 case NI_QTYPE_SUPTYPES:
1568 ND_PRINT((ndo,"supported qtypes"));
1569 i = EXTRACT_16BITS(&ni6->ni_flags);
1570 if (i)
1571 ND_PRINT((ndo," [%s]", (i & 0x01) ? "C" : ""));
1572 break;
1573 break;
1574 case NI_QTYPE_FQDN:
1575 ND_PRINT((ndo,"DNS name"));
1576 break;
1577 case NI_QTYPE_NODEADDR:
1578 ND_PRINT((ndo,"node addresses"));
1579 i = ni6->ni_flags;
1580 if (!i)
1581 break;
1582 /* NI_NODEADDR_FLAG_TRUNCATE undefined for query */
1583 ND_PRINT((ndo," [%s%s%s%s%s%s]",
1584 (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
1585 (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
1586 (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
1587 (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
1588 (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
1589 (i & NI_NODEADDR_FLAG_ALL) ? "A" : ""));
1590 break;
1591 default:
1592 ND_PRINT((ndo,"unknown"));
1593 break;
1594 }
1595
1596 if (ni6->ni_qtype == NI_QTYPE_NOOP ||
1597 ni6->ni_qtype == NI_QTYPE_SUPTYPES) {
1598 if (siz != sizeof(*ni6))
1599 if (ndo->ndo_vflag)
1600 ND_PRINT((ndo,", invalid len"));
1601 /*(*/
1602 ND_PRINT((ndo,")"));
1603 break;
1604 }
1605
1606
1607 /* XXX backward compat, icmp-name-lookup-03 */
1608 if (siz == sizeof(*ni6)) {
1609 ND_PRINT((ndo,", 03 draft"));
1610 /*(*/
1611 ND_PRINT((ndo,")"));
1612 break;
1613 }
1614
1615 switch (ni6->ni_code) {
1616 case ICMP6_NI_SUBJ_IPV6:
1617 if (!ND_TTEST2(*dp,
1618 sizeof(*ni6) + sizeof(struct in6_addr)))
1619 break;
1620 if (siz != sizeof(*ni6) + sizeof(struct in6_addr)) {
1621 if (ndo->ndo_vflag)
1622 ND_PRINT((ndo,", invalid subject len"));
1623 break;
1624 }
1625 ND_PRINT((ndo,", subject=%s",
1626 getname6((const u_char *)(ni6 + 1))));
1627 break;
1628 case ICMP6_NI_SUBJ_FQDN:
1629 ND_PRINT((ndo,", subject=DNS name"));
1630 cp = (const u_char *)(ni6 + 1);
1631 if (cp[0] == ep - cp - 1) {
1632 /* icmp-name-lookup-03, pascal string */
1633 if (ndo->ndo_vflag)
1634 ND_PRINT((ndo,", 03 draft"));
1635 cp++;
1636 ND_PRINT((ndo,", \""));
1637 while (cp < ep) {
1638 safeputchar(*cp);
1639 cp++;
1640 }
1641 ND_PRINT((ndo,"\""));
1642 } else
1643 dnsname_print(ndo, cp, ep);
1644 break;
1645 case ICMP6_NI_SUBJ_IPV4:
1646 if (!ND_TTEST2(*dp, sizeof(*ni6) + sizeof(struct in_addr)))
1647 break;
1648 if (siz != sizeof(*ni6) + sizeof(struct in_addr)) {
1649 if (ndo->ndo_vflag)
1650 ND_PRINT((ndo,", invalid subject len"));
1651 break;
1652 }
1653 ND_PRINT((ndo,", subject=%s",
1654 getname((const u_char *)(ni6 + 1))));
1655 break;
1656 default:
1657 ND_PRINT((ndo,", unknown subject"));
1658 break;
1659 }
1660
1661 /*(*/
1662 ND_PRINT((ndo,")"));
1663 break;
1664
1665 case ICMP6_NI_REPLY:
1666 if (icmp6len > siz) {
1667 ND_PRINT((ndo,"[|icmp6: node information reply]"));
1668 break;
1669 }
1670
1671 needcomma = 0;
1672
1673 ni6 = (struct icmp6_nodeinfo *)dp;
1674 ND_PRINT((ndo," node information reply"));
1675 ND_PRINT((ndo," (")); /*)*/
1676 switch (ni6->ni_code) {
1677 case ICMP6_NI_SUCCESS:
1678 if (ndo->ndo_vflag) {
1679 ND_PRINT((ndo,"success"));
1680 needcomma++;
1681 }
1682 break;
1683 case ICMP6_NI_REFUSED:
1684 ND_PRINT((ndo,"refused"));
1685 needcomma++;
1686 if (siz != sizeof(*ni6))
1687 if (ndo->ndo_vflag)
1688 ND_PRINT((ndo,", invalid length"));
1689 break;
1690 case ICMP6_NI_UNKNOWN:
1691 ND_PRINT((ndo,"unknown"));
1692 needcomma++;
1693 if (siz != sizeof(*ni6))
1694 if (ndo->ndo_vflag)
1695 ND_PRINT((ndo,", invalid length"));
1696 break;
1697 }
1698
1699 if (ni6->ni_code != ICMP6_NI_SUCCESS) {
1700 /*(*/
1701 ND_PRINT((ndo,")"));
1702 break;
1703 }
1704
1705 switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
1706 case NI_QTYPE_NOOP:
1707 if (needcomma)
1708 ND_PRINT((ndo,", "));
1709 ND_PRINT((ndo,"noop"));
1710 if (siz != sizeof(*ni6))
1711 if (ndo->ndo_vflag)
1712 ND_PRINT((ndo,", invalid length"));
1713 break;
1714 case NI_QTYPE_SUPTYPES:
1715 if (needcomma)
1716 ND_PRINT((ndo,", "));
1717 ND_PRINT((ndo,"supported qtypes"));
1718 i = EXTRACT_16BITS(&ni6->ni_flags);
1719 if (i)
1720 ND_PRINT((ndo," [%s]", (i & 0x01) ? "C" : ""));
1721 break;
1722 case NI_QTYPE_FQDN:
1723 if (needcomma)
1724 ND_PRINT((ndo,", "));
1725 ND_PRINT((ndo,"DNS name"));
1726 cp = (const u_char *)(ni6 + 1) + 4;
1727 if (cp[0] == ep - cp - 1) {
1728 /* icmp-name-lookup-03, pascal string */
1729 if (ndo->ndo_vflag)
1730 ND_PRINT((ndo,", 03 draft"));
1731 cp++;
1732 ND_PRINT((ndo,", \""));
1733 while (cp < ep) {
1734 safeputchar(*cp);
1735 cp++;
1736 }
1737 ND_PRINT((ndo,"\""));
1738 } else
1739 dnsname_print(ndo, cp, ep);
1740 if ((EXTRACT_16BITS(&ni6->ni_flags) & 0x01) != 0)
1741 ND_PRINT((ndo," [TTL=%u]", *(u_int32_t *)(ni6 + 1)));
1742 break;
1743 case NI_QTYPE_NODEADDR:
1744 if (needcomma)
1745 ND_PRINT((ndo,", "));
1746 ND_PRINT((ndo,"node addresses"));
1747 i = sizeof(*ni6);
1748 while (i < siz) {
1749 if (i + sizeof(struct in6_addr) + sizeof(int32_t) > siz)
1750 break;
1751 ND_PRINT((ndo," %s", getname6(bp + i)));
1752 i += sizeof(struct in6_addr);
1753 ND_PRINT((ndo,"(%d)", (int32_t)EXTRACT_32BITS(bp + i)));
1754 i += sizeof(int32_t);
1755 }
1756 i = ni6->ni_flags;
1757 if (!i)
1758 break;
1759 ND_PRINT((ndo," [%s%s%s%s%s%s%s]",
1760 (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
1761 (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
1762 (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
1763 (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
1764 (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
1765 (i & NI_NODEADDR_FLAG_ALL) ? "A" : "",
1766 (i & NI_NODEADDR_FLAG_TRUNCATE) ? "T" : ""));
1767 break;
1768 default:
1769 if (needcomma)
1770 ND_PRINT((ndo,", "));
1771 ND_PRINT((ndo,"unknown"));
1772 break;
1773 }
1774
1775 /*(*/
1776 ND_PRINT((ndo,")"));
1777 break;
1778 }
1779 return;
1780
1781 trunc:
1782 ND_PRINT((ndo, "[|icmp6]"));
1783 }
1784
1785 static void
1786 icmp6_rrenum_print(netdissect_options *ndo, const u_char *bp, const u_char *ep)
1787 {
1788 struct icmp6_router_renum *rr6;
1789 const char *cp;
1790 struct rr_pco_match *match;
1791 struct rr_pco_use *use;
1792 char hbuf[NI_MAXHOST];
1793 int n;
1794
1795 if (ep < bp)
1796 return;
1797 rr6 = (struct icmp6_router_renum *)bp;
1798 cp = (const char *)(rr6 + 1);
1799
1800 ND_TCHECK(rr6->rr_reserved);
1801 switch (rr6->rr_code) {
1802 case ICMP6_ROUTER_RENUMBERING_COMMAND:
1803 ND_PRINT((ndo,"router renum: command"));
1804 break;
1805 case ICMP6_ROUTER_RENUMBERING_RESULT:
1806 ND_PRINT((ndo,"router renum: result"));
1807 break;
1808 case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET:
1809 ND_PRINT((ndo,"router renum: sequence number reset"));
1810 break;
1811 default:
1812 ND_PRINT((ndo,"router renum: code-#%d", rr6->rr_code));
1813 break;
1814 }
1815
1816 ND_PRINT((ndo,", seq=%u", EXTRACT_32BITS(&rr6->rr_seqnum)));
1817
1818 if (ndo->ndo_vflag) {
1819 #define F(x, y) ((rr6->rr_flags) & (x) ? (y) : "")
1820 ND_PRINT((ndo,"[")); /*]*/
1821 if (rr6->rr_flags) {
1822 ND_PRINT((ndo,"%s%s%s%s%s,", F(ICMP6_RR_FLAGS_TEST, "T"),
1823 F(ICMP6_RR_FLAGS_REQRESULT, "R"),
1824 F(ICMP6_RR_FLAGS_FORCEAPPLY, "A"),
1825 F(ICMP6_RR_FLAGS_SPECSITE, "S"),
1826 F(ICMP6_RR_FLAGS_PREVDONE, "P")));
1827 }
1828 ND_PRINT((ndo,"seg=%u,", rr6->rr_segnum));
1829 ND_PRINT((ndo,"maxdelay=%u", EXTRACT_16BITS(&rr6->rr_maxdelay)));
1830 if (rr6->rr_reserved)
1831 ND_PRINT((ndo,"rsvd=0x%x", EXTRACT_32BITS(&rr6->rr_reserved)));
1832 /*[*/
1833 ND_PRINT((ndo,"]"));
1834 #undef F
1835 }
1836
1837 if (rr6->rr_code == ICMP6_ROUTER_RENUMBERING_COMMAND) {
1838 match = (struct rr_pco_match *)cp;
1839 cp = (const char *)(match + 1);
1840
1841 ND_TCHECK(match->rpm_prefix);
1842
1843 if (ndo->ndo_vflag > 1)
1844 ND_PRINT((ndo,"\n\t"));
1845 else
1846 ND_PRINT((ndo," "));
1847 ND_PRINT((ndo,"match(")); /*)*/
1848 switch (match->rpm_code) {
1849 case RPM_PCO_ADD: ND_PRINT((ndo,"add")); break;
1850 case RPM_PCO_CHANGE: ND_PRINT((ndo,"change")); break;
1851 case RPM_PCO_SETGLOBAL: ND_PRINT((ndo,"setglobal")); break;
1852 default: ND_PRINT((ndo,"#%u", match->rpm_code)); break;
1853 }
1854
1855 if (ndo->ndo_vflag) {
1856 ND_PRINT((ndo,",ord=%u", match->rpm_ordinal));
1857 ND_PRINT((ndo,",min=%u", match->rpm_minlen));
1858 ND_PRINT((ndo,",max=%u", match->rpm_maxlen));
1859 }
1860 if (inet_ntop(AF_INET6, &match->rpm_prefix, hbuf, sizeof(hbuf)))
1861 ND_PRINT((ndo,",%s/%u", hbuf, match->rpm_matchlen));
1862 else
1863 ND_PRINT((ndo,",?/%u", match->rpm_matchlen));
1864 /*(*/
1865 ND_PRINT((ndo,")"));
1866
1867 n = match->rpm_len - 3;
1868 if (n % 4)
1869 goto trunc;
1870 n /= 4;
1871 while (n-- > 0) {
1872 use = (struct rr_pco_use *)cp;
1873 cp = (const char *)(use + 1);
1874
1875 ND_TCHECK(use->rpu_prefix);
1876
1877 if (ndo->ndo_vflag > 1)
1878 ND_PRINT((ndo,"\n\t"));
1879 else
1880 ND_PRINT((ndo," "));
1881 ND_PRINT((ndo,"use(")); /*)*/
1882 if (use->rpu_flags) {
1883 #define F(x, y) ((use->rpu_flags) & (x) ? (y) : "")
1884 ND_PRINT((ndo,"%s%s,",
1885 F(ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME, "V"),
1886 F(ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME, "P")));
1887 #undef F
1888 }
1889 if (ndo->ndo_vflag) {
1890 ND_PRINT((ndo,"mask=0x%x,", use->rpu_ramask));
1891 ND_PRINT((ndo,"raflags=0x%x,", use->rpu_raflags));
1892 if (~use->rpu_vltime == 0)
1893 ND_PRINT((ndo,"vltime=infty,"));
1894 else
1895 ND_PRINT((ndo,"vltime=%u,",
1896 EXTRACT_32BITS(&use->rpu_vltime)));
1897 if (~use->rpu_pltime == 0)
1898 ND_PRINT((ndo,"pltime=infty,"));
1899 else
1900 ND_PRINT((ndo,"pltime=%u,",
1901 EXTRACT_32BITS(&use->rpu_pltime)));
1902 }
1903 if (inet_ntop(AF_INET6, &use->rpu_prefix, hbuf,
1904 sizeof(hbuf)))
1905 ND_PRINT((ndo,"%s/%u/%u", hbuf, use->rpu_uselen,
1906 use->rpu_keeplen));
1907 else
1908 ND_PRINT((ndo,"?/%u/%u", use->rpu_uselen,
1909 use->rpu_keeplen));
1910 /*(*/
1911 ND_PRINT((ndo,")"));
1912 }
1913 }
1914
1915 return;
1916
1917 trunc:
1918 ND_PRINT((ndo,"[|icmp6]"));
1919 }
1920
1921 #endif /* INET6 */
1922
1923 /*
1924 * Local Variables:
1925 * c-style: whitesmith
1926 * c-basic-offset: 8
1927 * End:
1928 */
[mirror] the TCPdump network dissector