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ICMPv6: Remove an unused macro and extra blank lines
[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 /* \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 /* network endian */
398 #define NI_SUPTYPE_FLAG_COMPRESS ((uint16_t)htons(0x1))
399 #define NI_FQDN_FLAG_VALIDTTL ((uint16_t)htons(0x1))
400
401 /* network endian */
402 #define NI_NODEADDR_FLAG_TRUNCATE ((uint16_t)htons(0x1))
403 #define NI_NODEADDR_FLAG_ALL ((uint16_t)htons(0x2))
404 #define NI_NODEADDR_FLAG_COMPAT ((uint16_t)htons(0x4))
405 #define NI_NODEADDR_FLAG_LINKLOCAL ((uint16_t)htons(0x8))
406 #define NI_NODEADDR_FLAG_SITELOCAL ((uint16_t)htons(0x10))
407 #define NI_NODEADDR_FLAG_GLOBAL ((uint16_t)htons(0x20))
408 #define NI_NODEADDR_FLAG_ANYCAST ((uint16_t)htons(0x40)) /* just experimental. not in spec */
409
410 struct ni_reply_fqdn {
411 nd_uint32_t ni_fqdn_ttl; /* TTL */
412 nd_uint8_t ni_fqdn_namelen; /* length in octets of the FQDN */
413 nd_byte ni_fqdn_name[3]; /* XXX: alignment */
414 };
415
416 /*
417 * Router Renumbering. as router-renum-08.txt
418 */
419 struct icmp6_router_renum { /* router renumbering header */
420 struct icmp6_hdr rr_hdr;
421 nd_uint8_t rr_segnum;
422 nd_uint8_t rr_flags;
423 nd_uint16_t rr_maxdelay;
424 nd_uint32_t rr_reserved;
425 };
426 #define ICMP6_RR_FLAGS_TEST 0x80
427 #define ICMP6_RR_FLAGS_REQRESULT 0x40
428 #define ICMP6_RR_FLAGS_FORCEAPPLY 0x20
429 #define ICMP6_RR_FLAGS_SPECSITE 0x10
430 #define ICMP6_RR_FLAGS_PREVDONE 0x08
431
432 #define rr_type rr_hdr.icmp6_type
433 #define rr_code rr_hdr.icmp6_code
434 #define rr_cksum rr_hdr.icmp6_cksum
435 #define rr_seqnum rr_hdr.icmp6_data32[0]
436
437 struct rr_pco_match { /* match prefix part */
438 nd_uint8_t rpm_code;
439 nd_uint8_t rpm_len;
440 nd_uint8_t rpm_ordinal;
441 nd_uint8_t rpm_matchlen;
442 nd_uint8_t rpm_minlen;
443 nd_uint8_t rpm_maxlen;
444 nd_uint16_t rpm_reserved;
445 nd_ipv6 rpm_prefix;
446 };
447
448 #define RPM_PCO_ADD 1
449 #define RPM_PCO_CHANGE 2
450 #define RPM_PCO_SETGLOBAL 3
451 #define RPM_PCO_MAX 4
452
453 struct rr_pco_use { /* use prefix part */
454 nd_uint8_t rpu_uselen;
455 nd_uint8_t rpu_keeplen;
456 nd_uint8_t rpu_ramask;
457 nd_uint8_t rpu_raflags;
458 nd_uint32_t rpu_vltime;
459 nd_uint32_t rpu_pltime;
460 nd_uint32_t rpu_flags;
461 nd_ipv6 rpu_prefix;
462 };
463 #define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK 0x80
464 #define ICMP6_RR_PCOUSE_RAFLAGS_AUTO 0x40
465
466 /* network endian */
467 #define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME ((uint32_t)htonl(0x80000000))
468 #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME ((uint32_t)htonl(0x40000000))
469
470 struct rr_result { /* router renumbering result message */
471 nd_uint16_t rrr_flags;
472 nd_uint8_t rrr_ordinal;
473 nd_uint8_t rrr_matchedlen;
474 nd_uint32_t rrr_ifid;
475 nd_ipv6 rrr_prefix;
476 };
477 /* network endian */
478 #define ICMP6_RR_RESULT_FLAGS_OOB ((uint16_t)htons(0x0002))
479 #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN ((uint16_t)htons(0x0001))
480
481 static const char *get_rtpref(u_int);
482 static const char *get_lifetime(uint32_t);
483 static void print_lladdr(netdissect_options *ndo, const u_char *, size_t);
484 static int icmp6_opt_print(netdissect_options *ndo, const u_char *, int);
485 static void mld6_print(netdissect_options *ndo, const u_char *);
486 static void mldv2_report_print(netdissect_options *ndo, const u_char *, u_int);
487 static void mldv2_query_print(netdissect_options *ndo, const u_char *, u_int);
488 static const struct udphdr *get_upperlayer(netdissect_options *ndo, const u_char *, u_int *);
489 static void dnsname_print(netdissect_options *ndo, const u_char *, const u_char *);
490 static void icmp6_nodeinfo_print(netdissect_options *ndo, u_int, const u_char *, const u_char *);
491 static void icmp6_rrenum_print(netdissect_options *ndo, const u_char *, const u_char *);
492
493 /*
494 * DIO: Updated to RFC6550, as published in 2012: section 6. (page 30)
495 */
496
497 #define ND_RPL_MESSAGE 155 /* 0x9B */
498
499 enum ND_RPL_CODE {
500 ND_RPL_DAG_IS=0x00,
501 ND_RPL_DAG_IO=0x01,
502 ND_RPL_DAO =0x02,
503 ND_RPL_DAO_ACK=0x03,
504 ND_RPL_SEC_DAG_IS = 0x80,
505 ND_RPL_SEC_DAG_IO = 0x81,
506 ND_RPL_SEC_DAG = 0x82,
507 ND_RPL_SEC_DAG_ACK= 0x83,
508 ND_RPL_SEC_CONSIST= 0x8A
509 };
510
511 enum ND_RPL_DIO_FLAGS {
512 ND_RPL_DIO_GROUNDED = 0x80,
513 ND_RPL_DIO_DATRIG = 0x40,
514 ND_RPL_DIO_DASUPPORT= 0x20,
515 ND_RPL_DIO_RES4 = 0x10,
516 ND_RPL_DIO_RES3 = 0x08,
517 ND_RPL_DIO_PRF_MASK = 0x07 /* 3-bit preference */
518 };
519
520 #define DAGID_LEN 16
521
522 /* section 6 of draft-ietf-roll-rpl-19 */
523 struct nd_rpl_security {
524 nd_uint8_t rpl_sec_t_reserved; /* bit 7 is T-bit */
525 nd_uint8_t rpl_sec_algo;
526 nd_uint16_t rpl_sec_kim_lvl_flags; /* bit 15/14, KIM */
527 /* bit 10-8, LVL, bit 7-0 flags */
528 nd_uint32_t rpl_sec_counter;
529 #if 0
530 nd_byte rpl_sec_ki[0]; /* depends upon kim */
531 #endif
532 };
533
534 /* section 6.2.1, DODAG Information Solication (DIS_IS) */
535 struct nd_rpl_dis_is {
536 nd_uint8_t rpl_dis_flags;
537 nd_uint8_t rpl_dis_reserved;
538 #if 0
539 nd_byte rpl_dis_options[0];
540 #endif
541 };
542
543 /* section 6.3.1, DODAG Information Object (DIO) */
544 struct nd_rpl_dio {
545 nd_uint8_t rpl_instanceid;
546 nd_uint8_t rpl_version;
547 nd_uint16_t rpl_dagrank;
548 nd_uint8_t rpl_mopprf; /* bit 7=G, 5-3=MOP, 2-0=PRF */
549 nd_uint8_t rpl_dtsn; /* Dest. Advertisement Trigger Sequence Number */
550 nd_uint8_t rpl_flags; /* no flags defined yet */
551 nd_uint8_t rpl_resv1;
552 nd_byte rpl_dagid[DAGID_LEN];
553 };
554 #define RPL_DIO_GROUND_FLAG 0x80
555 #define RPL_DIO_MOP_SHIFT 3
556 #define RPL_DIO_MOP_MASK (7 << RPL_DIO_MOP_SHIFT)
557 #define RPL_DIO_PRF_SHIFT 0
558 #define RPL_DIO_PRF_MASK (7 << RPL_DIO_PRF_SHIFT)
559 #define RPL_DIO_GROUNDED(X) ((X)&RPL_DIO_GROUND_FLAG)
560 #define RPL_DIO_MOP(X) (enum RPL_DIO_MOP)(((X)&RPL_DIO_MOP_MASK) >> RPL_DIO_MOP_SHIFT)
561 #define RPL_DIO_PRF(X) (((X)&RPL_DIO_PRF_MASK) >> RPL_DIO_PRF_SHIFT)
562
563 enum RPL_DIO_MOP {
564 RPL_DIO_NONSTORING= 0x0,
565 RPL_DIO_STORING = 0x1,
566 RPL_DIO_NONSTORING_MULTICAST = 0x2,
567 RPL_DIO_STORING_MULTICAST = 0x3
568 };
569
570 enum RPL_SUBOPT {
571 RPL_OPT_PAD1 = 0,
572 RPL_OPT_PADN = 1,
573 RPL_DIO_METRICS = 2,
574 RPL_DIO_ROUTINGINFO = 3,
575 RPL_DIO_CONFIG = 4,
576 RPL_DAO_RPLTARGET = 5,
577 RPL_DAO_TRANSITINFO = 6,
578 RPL_DIO_DESTPREFIX = 8,
579 RPL_DAO_RPLTARGET_DESC=9
580 };
581
582 struct rpl_genoption {
583 nd_uint8_t rpl_dio_type;
584 nd_uint8_t rpl_dio_len; /* suboption length, not including type/len */
585 };
586 #define RPL_GENOPTION_LEN 2
587
588 #define RPL_DIO_LIFETIME_INFINITE 0xffffffff
589 #define RPL_DIO_LIFETIME_DISCONNECT 0
590
591 struct rpl_dio_destprefix {
592 nd_uint8_t rpl_dio_type;
593 nd_uint8_t rpl_dio_len;
594 nd_uint8_t rpl_dio_prefixlen; /* in bits */
595 nd_uint8_t rpl_dio_prf; /* flags, including Route Preference */
596 nd_uint32_t rpl_dio_prefixlifetime; /* in seconds */
597 #if 0
598 nd_byte rpl_dio_prefix[0]; /* variable number of bytes */
599 #endif
600 };
601
602 /* section 6.4.1, DODAG Information Object (DIO) */
603 struct nd_rpl_dao {
604 nd_uint8_t rpl_instanceid;
605 nd_uint8_t rpl_flags; /* bit 7=K, 6=D */
606 nd_uint8_t rpl_resv;
607 nd_uint8_t rpl_daoseq;
608 nd_byte rpl_dagid[DAGID_LEN]; /* present when D set. */
609 };
610 #define ND_RPL_DAO_MIN_LEN 4 /* length without DAGID */
611
612 /* indicates if this DAO is to be acK'ed */
613 #define RPL_DAO_K_SHIFT 7
614 #define RPL_DAO_K_MASK (1 << RPL_DAO_K_SHIFT)
615 #define RPL_DAO_K(X) (((X)&RPL_DAO_K_MASK) >> RPL_DAO_K_SHIFT)
616
617 /* indicates if the DAGID is present */
618 #define RPL_DAO_D_SHIFT 6
619 #define RPL_DAO_D_MASK (1 << RPL_DAO_D_SHIFT)
620 #define RPL_DAO_D(X) (((X)&RPL_DAO_D_MASK) >> RPL_DAO_D_SHIFT)
621
622 struct rpl_dao_target {
623 nd_uint8_t rpl_dao_type;
624 nd_uint8_t rpl_dao_len;
625 nd_uint8_t rpl_dao_flags; /* unused */
626 nd_uint8_t rpl_dao_prefixlen; /* in bits */
627 #if 0
628 nd_byte rpl_dao_prefix[0]; /* variable number of bytes */
629 #endif
630 };
631
632 /* section 6.5.1, Destination Advertisement Object Acknowledgement (DAO-ACK) */
633 struct nd_rpl_daoack {
634 nd_uint8_t rpl_instanceid;
635 nd_uint8_t rpl_flags; /* bit 7=D */
636 nd_uint8_t rpl_daoseq;
637 nd_uint8_t rpl_status;
638 nd_byte rpl_dagid[DAGID_LEN]; /* present when D set. */
639 };
640 #define ND_RPL_DAOACK_MIN_LEN 4 /* length without DAGID */
641 /* indicates if the DAGID is present */
642 #define RPL_DAOACK_D_SHIFT 7
643 #define RPL_DAOACK_D_MASK (1 << RPL_DAOACK_D_SHIFT)
644 #define RPL_DAOACK_D(X) (((X)&RPL_DAOACK_D_MASK) >> RPL_DAOACK_D_SHIFT)
645
646 static const struct tok icmp6_type_values[] = {
647 { ICMP6_DST_UNREACH, "destination unreachable"},
648 { ICMP6_PACKET_TOO_BIG, "packet too big"},
649 { ICMP6_TIME_EXCEEDED, "time exceeded in-transit"},
650 { ICMP6_PARAM_PROB, "parameter problem"},
651 { ICMP6_ECHO_REQUEST, "echo request"},
652 { ICMP6_ECHO_REPLY, "echo reply"},
653 { MLD6_LISTENER_QUERY, "multicast listener query"},
654 { MLD6_LISTENER_REPORT, "multicast listener report"},
655 { MLD6_LISTENER_DONE, "multicast listener done"},
656 { ND_ROUTER_SOLICIT, "router solicitation"},
657 { ND_ROUTER_ADVERT, "router advertisement"},
658 { ND_NEIGHBOR_SOLICIT, "neighbor solicitation"},
659 { ND_NEIGHBOR_ADVERT, "neighbor advertisement"},
660 { ND_REDIRECT, "redirect"},
661 { ICMP6_ROUTER_RENUMBERING, "router renumbering"},
662 { IND_SOLICIT, "inverse neighbor solicitation"},
663 { IND_ADVERT, "inverse neighbor advertisement"},
664 { MLDV2_LISTENER_REPORT, "multicast listener report v2"},
665 { ICMP6_HADISCOV_REQUEST, "ha discovery request"},
666 { ICMP6_HADISCOV_REPLY, "ha discovery reply"},
667 { ICMP6_MOBILEPREFIX_SOLICIT, "mobile router solicitation"},
668 { ICMP6_MOBILEPREFIX_ADVERT, "mobile router advertisement"},
669 { ICMP6_WRUREQUEST, "who-are-you request"},
670 { ICMP6_WRUREPLY, "who-are-you reply"},
671 { ICMP6_NI_QUERY, "node information query"},
672 { ICMP6_NI_REPLY, "node information reply"},
673 { MLD6_MTRACE, "mtrace message"},
674 { MLD6_MTRACE_RESP, "mtrace response"},
675 { ND_RPL_MESSAGE, "RPL"},
676 { 0, NULL }
677 };
678
679 static const struct tok icmp6_dst_unreach_code_values[] = {
680 { ICMP6_DST_UNREACH_NOROUTE, "unreachable route" },
681 { ICMP6_DST_UNREACH_ADMIN, " unreachable prohibited"},
682 { ICMP6_DST_UNREACH_BEYONDSCOPE, "beyond scope"},
683 { ICMP6_DST_UNREACH_ADDR, "unreachable address"},
684 { ICMP6_DST_UNREACH_NOPORT, "unreachable port"},
685 { 0, NULL }
686 };
687
688 static const struct tok icmp6_opt_pi_flag_values[] = {
689 { ND_OPT_PI_FLAG_ONLINK, "onlink" },
690 { ND_OPT_PI_FLAG_AUTO, "auto" },
691 { ND_OPT_PI_FLAG_ROUTER, "router" },
692 { 0, NULL }
693 };
694
695 static const struct tok icmp6_opt_ra_flag_values[] = {
696 { ND_RA_FLAG_MANAGED, "managed" },
697 { ND_RA_FLAG_OTHER, "other stateful"},
698 { ND_RA_FLAG_HOME_AGENT, "home agent"},
699 { ND_RA_FLAG_IPV6ONLY, "ipv6 only"},
700 { 0, NULL }
701 };
702
703 static const struct tok icmp6_nd_na_flag_values[] = {
704 { ND_NA_FLAG_ROUTER, "router" },
705 { ND_NA_FLAG_SOLICITED, "solicited" },
706 { ND_NA_FLAG_OVERRIDE, "override" },
707 { 0, NULL }
708 };
709
710 static const struct tok icmp6_opt_values[] = {
711 { ND_OPT_SOURCE_LINKADDR, "source link-address"},
712 { ND_OPT_TARGET_LINKADDR, "destination link-address"},
713 { ND_OPT_PREFIX_INFORMATION, "prefix info"},
714 { ND_OPT_REDIRECTED_HEADER, "redirected header"},
715 { ND_OPT_MTU, "mtu"},
716 { ND_OPT_RDNSS, "rdnss"},
717 { ND_OPT_DNSSL, "dnssl"},
718 { ND_OPT_ADVINTERVAL, "advertisement interval"},
719 { ND_OPT_HOMEAGENT_INFO, "homeagent information"},
720 { ND_OPT_ROUTE_INFO, "route info"},
721 { 0, NULL }
722 };
723
724 /* mldv2 report types */
725 static const struct tok mldv2report2str[] = {
726 { 1, "is_in" },
727 { 2, "is_ex" },
728 { 3, "to_in" },
729 { 4, "to_ex" },
730 { 5, "allow" },
731 { 6, "block" },
732 { 0, NULL }
733 };
734
735 static const char *
736 get_rtpref(u_int v)
737 {
738 static const char *rtpref_str[] = {
739 "medium", /* 00 */
740 "high", /* 01 */
741 "rsv", /* 10 */
742 "low" /* 11 */
743 };
744
745 return rtpref_str[((v & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff];
746 }
747
748 static const char *
749 get_lifetime(uint32_t v)
750 {
751 static char buf[20];
752
753 if (v == (uint32_t)~0UL)
754 return "infinity";
755 else {
756 snprintf(buf, sizeof(buf), "%us", v);
757 return buf;
758 }
759 }
760
761 static void
762 print_lladdr(netdissect_options *ndo, const uint8_t *p, size_t l)
763 {
764 const uint8_t *ep, *q;
765
766 q = p;
767 ep = p + l;
768 while (l > 0 && q < ep) {
769 if (q > p)
770 ND_PRINT(":");
771 ND_PRINT("%02x", GET_U_1(q));
772 q++;
773 l--;
774 }
775 }
776
777 static uint16_t icmp6_cksum(netdissect_options *ndo, const struct ip6_hdr *ip6,
778 const struct icmp6_hdr *icp, u_int len)
779 {
780 return nextproto6_cksum(ndo, ip6, (const uint8_t *)(const void *)icp, len, len,
781 IPPROTO_ICMPV6);
782 }
783
784 static const struct tok rpl_mop_values[] = {
785 { RPL_DIO_NONSTORING, "nonstoring"},
786 { RPL_DIO_STORING, "storing"},
787 { RPL_DIO_NONSTORING_MULTICAST, "nonstoring-multicast"},
788 { RPL_DIO_STORING_MULTICAST, "storing-multicast"},
789 { 0, NULL},
790 };
791
792 static const struct tok rpl_subopt_values[] = {
793 { RPL_OPT_PAD1, "pad1"},
794 { RPL_OPT_PADN, "padN"},
795 { RPL_DIO_METRICS, "metrics"},
796 { RPL_DIO_ROUTINGINFO, "routinginfo"},
797 { RPL_DIO_CONFIG, "config"},
798 { RPL_DAO_RPLTARGET, "rpltarget"},
799 { RPL_DAO_TRANSITINFO, "transitinfo"},
800 { RPL_DIO_DESTPREFIX, "destprefix"},
801 { RPL_DAO_RPLTARGET_DESC, "rpltargetdesc"},
802 { 0, NULL},
803 };
804
805 static void
806 rpl_printopts(netdissect_options *ndo, const uint8_t *opts, u_int length)
807 {
808 const struct rpl_genoption *opt;
809 uint8_t dio_type;
810 u_int optlen;
811
812 while (length != 0) {
813 opt = (const struct rpl_genoption *)opts;
814 dio_type = GET_U_1(opt->rpl_dio_type);
815 if (dio_type == RPL_OPT_PAD1) {
816 optlen = 1;
817 ND_PRINT(" opt:pad1");
818 } else {
819 if (length < RPL_GENOPTION_LEN)
820 goto trunc;
821 optlen = GET_U_1(opt->rpl_dio_len)+RPL_GENOPTION_LEN;
822 ND_PRINT(" opt:%s len:%u ",
823 tok2str(rpl_subopt_values, "subopt:%u", dio_type),
824 optlen);
825 ND_TCHECK_LEN(opt, optlen);
826 if (length < optlen)
827 goto trunc;
828 if (ndo->ndo_vflag > 2) {
829 hex_print(ndo,
830 " ",
831 opts + RPL_GENOPTION_LEN, /* content of DIO option */
832 optlen - RPL_GENOPTION_LEN);
833 }
834 }
835 opts += optlen;
836 length -= optlen;
837 }
838 return;
839 trunc:
840 nd_print_trunc(ndo);
841 }
842
843 static void
844 rpl_dio_print(netdissect_options *ndo,
845 const u_char *bp, u_int length)
846 {
847 const struct nd_rpl_dio *dio = (const struct nd_rpl_dio *)bp;
848
849 ND_LCHECK_ZU(length, sizeof(struct nd_rpl_dio));
850 ND_PRINT(" [dagid:%s,seq:%u,instance:%u,rank:%u,%smop:%s,prf:%u]",
851 GET_IP6ADDR_STRING(dio->rpl_dagid),
852 GET_U_1(dio->rpl_dtsn),
853 GET_U_1(dio->rpl_instanceid),
854 GET_BE_U_2(dio->rpl_dagrank),
855 RPL_DIO_GROUNDED(GET_U_1(dio->rpl_mopprf)) ? "grounded,":"",
856 tok2str(rpl_mop_values, "mop%u",
857 RPL_DIO_MOP(GET_U_1(dio->rpl_mopprf))),
858 RPL_DIO_PRF(GET_U_1(dio->rpl_mopprf)));
859
860 if(ndo->ndo_vflag > 1) {
861 rpl_printopts(ndo, bp + sizeof(struct nd_rpl_dio),
862 length - sizeof(struct nd_rpl_dio));
863 }
864 return;
865 invalid:
866 nd_print_invalid(ndo);
867 }
868
869 static void
870 rpl_dao_print(netdissect_options *ndo,
871 const u_char *bp, u_int length)
872 {
873 const struct nd_rpl_dao *dao = (const struct nd_rpl_dao *)bp;
874 const char *dagid_str = "<elided>";
875 uint8_t rpl_flags;
876
877 ND_TCHECK_SIZE(dao);
878 if (length < ND_RPL_DAO_MIN_LEN)
879 goto tooshort;
880
881 bp += ND_RPL_DAO_MIN_LEN;
882 length -= ND_RPL_DAO_MIN_LEN;
883 rpl_flags = GET_U_1(dao->rpl_flags);
884 if(RPL_DAO_D(rpl_flags)) {
885 ND_TCHECK_LEN(dao->rpl_dagid, DAGID_LEN);
886 if (length < DAGID_LEN)
887 goto tooshort;
888 dagid_str = ip6addr_string (ndo, dao->rpl_dagid);
889 bp += DAGID_LEN;
890 length -= DAGID_LEN;
891 }
892
893 ND_PRINT(" [dagid:%s,seq:%u,instance:%u%s%s,%02x]",
894 dagid_str,
895 GET_U_1(dao->rpl_daoseq),
896 GET_U_1(dao->rpl_instanceid),
897 RPL_DAO_K(rpl_flags) ? ",acK":"",
898 RPL_DAO_D(rpl_flags) ? ",Dagid":"",
899 rpl_flags);
900
901 if(ndo->ndo_vflag > 1) {
902 rpl_printopts(ndo, bp, length);
903 }
904 return;
905
906 trunc:
907 nd_print_trunc(ndo);
908 return;
909
910 tooshort:
911 ND_PRINT(" [|length too short]");
912 }
913
914 static void
915 rpl_daoack_print(netdissect_options *ndo,
916 const u_char *bp, u_int length)
917 {
918 const struct nd_rpl_daoack *daoack = (const struct nd_rpl_daoack *)bp;
919 const char *dagid_str = "<elided>";
920
921 ND_TCHECK_LEN(daoack, ND_RPL_DAOACK_MIN_LEN);
922 if (length < ND_RPL_DAOACK_MIN_LEN)
923 goto tooshort;
924
925 bp += ND_RPL_DAOACK_MIN_LEN;
926 length -= ND_RPL_DAOACK_MIN_LEN;
927 if(RPL_DAOACK_D(GET_U_1(daoack->rpl_flags))) {
928 ND_TCHECK_LEN(daoack->rpl_dagid, DAGID_LEN);
929 if (length < DAGID_LEN)
930 goto tooshort;
931 dagid_str = ip6addr_string (ndo, daoack->rpl_dagid);
932 bp += DAGID_LEN;
933 length -= DAGID_LEN;
934 }
935
936 ND_PRINT(" [dagid:%s,seq:%u,instance:%u,status:%u]",
937 dagid_str,
938 GET_U_1(daoack->rpl_daoseq),
939 GET_U_1(daoack->rpl_instanceid),
940 GET_U_1(daoack->rpl_status));
941
942 /* no officially defined options for DAOACK, but print any we find */
943 if(ndo->ndo_vflag > 1) {
944 rpl_printopts(ndo, bp, length);
945 }
946 return;
947
948 trunc:
949 nd_print_trunc(ndo);
950 return;
951
952 tooshort:
953 ND_PRINT(" [|dao-length too short]");
954 }
955
956 static void
957 rpl_print(netdissect_options *ndo,
958 uint8_t icmp6_code,
959 const u_char *bp, u_int length)
960 {
961 int secured = icmp6_code & 0x80;
962 int basecode= icmp6_code & 0x7f;
963
964 if(secured) {
965 ND_PRINT(", (SEC) [worktodo]");
966 /* XXX
967 * the next header pointer needs to move forward to
968 * skip the secure part.
969 */
970 return;
971 } else {
972 ND_PRINT(", (CLR)");
973 }
974
975 switch(basecode) {
976 case ND_RPL_DAG_IS:
977 ND_PRINT("DODAG Information Solicitation");
978 if(ndo->ndo_vflag) {
979 }
980 break;
981 case ND_RPL_DAG_IO:
982 ND_PRINT("DODAG Information Object");
983 if(ndo->ndo_vflag) {
984 rpl_dio_print(ndo, bp, length);
985 }
986 break;
987 case ND_RPL_DAO:
988 ND_PRINT("Destination Advertisement Object");
989 if(ndo->ndo_vflag) {
990 rpl_dao_print(ndo, bp, length);
991 }
992 break;
993 case ND_RPL_DAO_ACK:
994 ND_PRINT("Destination Advertisement Object Ack");
995 if(ndo->ndo_vflag) {
996 rpl_daoack_print(ndo, bp, length);
997 }
998 break;
999 default:
1000 ND_PRINT("RPL message, unknown code %u",icmp6_code);
1001 break;
1002 }
1003 return;
1004
1005 #if 0
1006 trunc:
1007 nd_print_trunc(ndo);
1008 return;
1009 #endif
1010
1011 }
1012
1013 void
1014 icmp6_print(netdissect_options *ndo,
1015 const u_char *bp, u_int length, const u_char *bp2, int fragmented)
1016 {
1017 const struct icmp6_hdr *dp;
1018 uint8_t icmp6_type, icmp6_code;
1019 const struct ip6_hdr *ip;
1020 const struct ip6_hdr *oip;
1021 const struct udphdr *ouh;
1022 uint16_t dport;
1023 const u_char *ep;
1024 u_int prot;
1025
1026 ndo->ndo_protocol = "icmp6";
1027 dp = (const struct icmp6_hdr *)bp;
1028 ip = (const struct ip6_hdr *)bp2;
1029 oip = (const struct ip6_hdr *)(dp + 1);
1030 /* 'ep' points to the end of available data. */
1031 ep = ndo->ndo_snapend;
1032 if (length == 0) {
1033 ND_PRINT("ICMP6, length 0");
1034 nd_print_invalid(ndo);
1035 return;
1036 }
1037
1038 if (ndo->ndo_vflag && !fragmented) {
1039 uint16_t sum, udp_sum;
1040
1041 if (ND_TTEST_LEN(bp, length)) {
1042 udp_sum = GET_BE_U_2(dp->icmp6_cksum);
1043 sum = icmp6_cksum(ndo, ip, dp, length);
1044 if (sum != 0)
1045 ND_PRINT("[bad icmp6 cksum 0x%04x -> 0x%04x!] ",
1046 udp_sum,
1047 in_cksum_shouldbe(udp_sum, sum));
1048 else
1049 ND_PRINT("[icmp6 sum ok] ");
1050 }
1051 }
1052
1053 icmp6_type = GET_U_1(dp->icmp6_type);
1054 ND_PRINT("ICMP6, %s", tok2str(icmp6_type_values,"unknown icmp6 type (%u)",icmp6_type));
1055
1056 /* display cosmetics: print the packet length for printer that use the vflag now */
1057 if (ndo->ndo_vflag && (icmp6_type == ND_ROUTER_SOLICIT ||
1058 icmp6_type == ND_ROUTER_ADVERT ||
1059 icmp6_type == ND_NEIGHBOR_ADVERT ||
1060 icmp6_type == ND_NEIGHBOR_SOLICIT ||
1061 icmp6_type == ND_REDIRECT ||
1062 icmp6_type == ICMP6_HADISCOV_REPLY ||
1063 icmp6_type == ICMP6_MOBILEPREFIX_ADVERT ))
1064 ND_PRINT(", length %u", length);
1065
1066 icmp6_code = GET_U_1(dp->icmp6_code);
1067
1068 switch (icmp6_type) {
1069 case ICMP6_DST_UNREACH:
1070 ND_PRINT(", %s", tok2str(icmp6_dst_unreach_code_values,"unknown unreach code (%u)",icmp6_code));
1071 switch (icmp6_code) {
1072
1073 case ICMP6_DST_UNREACH_NOROUTE: /* fall through */
1074 case ICMP6_DST_UNREACH_ADMIN:
1075 case ICMP6_DST_UNREACH_ADDR:
1076 ND_PRINT(" %s",GET_IP6ADDR_STRING(oip->ip6_dst));
1077 break;
1078 case ICMP6_DST_UNREACH_BEYONDSCOPE:
1079 ND_PRINT(" %s, source address %s",
1080 GET_IP6ADDR_STRING(oip->ip6_dst),
1081 GET_IP6ADDR_STRING(oip->ip6_src));
1082 break;
1083 case ICMP6_DST_UNREACH_NOPORT:
1084 if ((ouh = get_upperlayer(ndo, (const u_char *)oip, &prot))
1085 == NULL)
1086 goto trunc;
1087
1088 dport = GET_BE_U_2(ouh->uh_dport);
1089 switch (prot) {
1090 case IPPROTO_TCP:
1091 ND_PRINT(", %s tcp port %s",
1092 GET_IP6ADDR_STRING(oip->ip6_dst),
1093 tcpport_string(ndo, dport));
1094 break;
1095 case IPPROTO_UDP:
1096 ND_PRINT(", %s udp port %s",
1097 GET_IP6ADDR_STRING(oip->ip6_dst),
1098 udpport_string(ndo, dport));
1099 break;
1100 default:
1101 ND_PRINT(", %s protocol %u port %u unreachable",
1102 GET_IP6ADDR_STRING(oip->ip6_dst),
1103 prot, dport);
1104 break;
1105 }
1106 break;
1107 default:
1108 if (ndo->ndo_vflag <= 1) {
1109 print_unknown_data(ndo, bp,"\n\t",length);
1110 return;
1111 }
1112 break;
1113 }
1114 break;
1115 case ICMP6_PACKET_TOO_BIG:
1116 ND_PRINT(", mtu %u", GET_BE_U_4(dp->icmp6_mtu));
1117 break;
1118 case ICMP6_TIME_EXCEEDED:
1119 switch (icmp6_code) {
1120 case ICMP6_TIME_EXCEED_TRANSIT:
1121 ND_PRINT(" for %s",
1122 GET_IP6ADDR_STRING(oip->ip6_dst));
1123 break;
1124 case ICMP6_TIME_EXCEED_REASSEMBLY:
1125 ND_PRINT(" (reassembly)");
1126 break;
1127 default:
1128 ND_PRINT(", unknown code (%u)", icmp6_code);
1129 break;
1130 }
1131 break;
1132 case ICMP6_PARAM_PROB:
1133 ND_TCHECK_16(oip->ip6_dst);
1134 switch (icmp6_code) {
1135 case ICMP6_PARAMPROB_HEADER:
1136 ND_PRINT(", erroneous - octet %u",
1137 GET_BE_U_4(dp->icmp6_pptr));
1138 break;
1139 case ICMP6_PARAMPROB_NEXTHEADER:
1140 ND_PRINT(", next header - octet %u",
1141 GET_BE_U_4(dp->icmp6_pptr));
1142 break;
1143 case ICMP6_PARAMPROB_OPTION:
1144 ND_PRINT(", option - octet %u",
1145 GET_BE_U_4(dp->icmp6_pptr));
1146 break;
1147 case ICMP6_PARAMPROB_FRAGHDRCHAIN:
1148 ND_PRINT(", incomplete header chain - octet %u",
1149 GET_BE_U_4(dp->icmp6_pptr));
1150 break;
1151 default:
1152 ND_PRINT(", code-#%u",
1153 icmp6_code);
1154 break;
1155 }
1156 break;
1157 case ICMP6_ECHO_REQUEST:
1158 case ICMP6_ECHO_REPLY:
1159 ND_PRINT(", id %u, seq %u", GET_BE_U_2(dp->icmp6_id),
1160 GET_BE_U_2(dp->icmp6_seq));
1161 break;
1162 case ICMP6_MEMBERSHIP_QUERY:
1163 if (length == MLD_MINLEN) {
1164 mld6_print(ndo, (const u_char *)dp);
1165 } else if (length >= MLDV2_MINLEN) {
1166 ND_PRINT(" v2");
1167 mldv2_query_print(ndo, (const u_char *)dp, length);
1168 } else {
1169 ND_PRINT(" unknown-version (len %u) ", length);
1170 }
1171 break;
1172 case ICMP6_MEMBERSHIP_REPORT:
1173 mld6_print(ndo, (const u_char *)dp);
1174 break;
1175 case ICMP6_MEMBERSHIP_REDUCTION:
1176 mld6_print(ndo, (const u_char *)dp);
1177 break;
1178 case ND_ROUTER_SOLICIT:
1179 #define RTSOLLEN 8
1180 if (ndo->ndo_vflag) {
1181 if (icmp6_opt_print(ndo, (const u_char *)dp + RTSOLLEN,
1182 length - RTSOLLEN) == -1)
1183 goto trunc;
1184 }
1185 break;
1186 case ND_ROUTER_ADVERT:
1187 #define RTADVLEN 16
1188 if (ndo->ndo_vflag) {
1189 const struct nd_router_advert *p;
1190
1191 p = (const struct nd_router_advert *)dp;
1192 ND_PRINT("\n\thop limit %u, Flags [%s]"
1193 ", pref %s, router lifetime %us, reachable time %ums, retrans timer %ums",
1194 GET_U_1(p->nd_ra_curhoplimit),
1195 bittok2str(icmp6_opt_ra_flag_values,"none",GET_U_1(p->nd_ra_flags_reserved)),
1196 get_rtpref(GET_U_1(p->nd_ra_flags_reserved)),
1197 GET_BE_U_2(p->nd_ra_router_lifetime),
1198 GET_BE_U_4(p->nd_ra_reachable),
1199 GET_BE_U_4(p->nd_ra_retransmit));
1200
1201 if (icmp6_opt_print(ndo, (const u_char *)dp + RTADVLEN,
1202 length - RTADVLEN) == -1)
1203 goto trunc;
1204 }
1205 break;
1206 case ND_NEIGHBOR_SOLICIT:
1207 {
1208 const struct nd_neighbor_solicit *p;
1209 p = (const struct nd_neighbor_solicit *)dp;
1210 ND_PRINT(", who has %s", GET_IP6ADDR_STRING(p->nd_ns_target));
1211 if (ndo->ndo_vflag) {
1212 #define NDSOLLEN 24
1213 if (icmp6_opt_print(ndo, (const u_char *)dp + NDSOLLEN,
1214 length - NDSOLLEN) == -1)
1215 goto trunc;
1216 }
1217 }
1218 break;
1219 case ND_NEIGHBOR_ADVERT:
1220 {
1221 const struct nd_neighbor_advert *p;
1222
1223 p = (const struct nd_neighbor_advert *)dp;
1224 ND_PRINT(", tgt is %s",
1225 GET_IP6ADDR_STRING(p->nd_na_target));
1226 if (ndo->ndo_vflag) {
1227 ND_PRINT(", Flags [%s]",
1228 bittok2str(icmp6_nd_na_flag_values,
1229 "none",
1230 GET_BE_U_4(p->nd_na_flags_reserved)));
1231 #define NDADVLEN 24
1232 if (icmp6_opt_print(ndo, (const u_char *)dp + NDADVLEN,
1233 length - NDADVLEN) == -1)
1234 goto trunc;
1235 #undef NDADVLEN
1236 }
1237 }
1238 break;
1239 case ND_REDIRECT:
1240 {
1241 const struct nd_redirect *p;
1242
1243 p = (const struct nd_redirect *)dp;
1244 ND_PRINT(", %s", GET_IP6ADDR_STRING(p->nd_rd_dst));
1245 ND_PRINT(" to %s", GET_IP6ADDR_STRING(p->nd_rd_target));
1246 #define REDIRECTLEN 40
1247 if (ndo->ndo_vflag) {
1248 if (icmp6_opt_print(ndo, (const u_char *)dp + REDIRECTLEN,
1249 length - REDIRECTLEN) == -1)
1250 goto trunc;
1251 #undef REDIRECTLEN
1252 }
1253 }
1254 break;
1255 case ICMP6_ROUTER_RENUMBERING:
1256 icmp6_rrenum_print(ndo, bp, ep);
1257 break;
1258 case ICMP6_NI_QUERY:
1259 case ICMP6_NI_REPLY:
1260 icmp6_nodeinfo_print(ndo, length, bp, ep);
1261 break;
1262 case IND_SOLICIT:
1263 case IND_ADVERT:
1264 break;
1265 case ICMP6_V2_MEMBERSHIP_REPORT:
1266 mldv2_report_print(ndo, (const u_char *) dp, length);
1267 break;
1268 case ICMP6_MOBILEPREFIX_SOLICIT: /* fall through */
1269 case ICMP6_HADISCOV_REQUEST:
1270 ND_PRINT(", id 0x%04x", GET_BE_U_2(dp->icmp6_data16[0]));
1271 break;
1272 case ICMP6_HADISCOV_REPLY:
1273 if (ndo->ndo_vflag) {
1274 const u_char *cp;
1275 const u_char *p;
1276
1277 ND_PRINT(", id 0x%04x",
1278 GET_BE_U_2(dp->icmp6_data16[0]));
1279 cp = (const u_char *)dp + length;
1280 p = (const u_char *)(dp + 1);
1281 while (p < cp) {
1282 ND_PRINT(", %s", GET_IP6ADDR_STRING(p));
1283 p += 16;
1284 }
1285 }
1286 break;
1287 case ICMP6_MOBILEPREFIX_ADVERT:
1288 if (ndo->ndo_vflag) {
1289 uint16_t flags;
1290
1291 ND_PRINT(", id 0x%04x",
1292 GET_BE_U_2(dp->icmp6_data16[0]));
1293 flags = GET_BE_U_2(dp->icmp6_data16[1]);
1294 if (flags & 0xc000)
1295 ND_PRINT(" ");
1296 if (flags & 0x8000)
1297 ND_PRINT("M");
1298 if (flags & 0x4000)
1299 ND_PRINT("O");
1300 #define MPADVLEN 8
1301 if (icmp6_opt_print(ndo, (const u_char *)dp + MPADVLEN,
1302 length - MPADVLEN) == -1)
1303 goto trunc;
1304 }
1305 break;
1306 case ND_RPL_MESSAGE:
1307 /* plus 4, because struct icmp6_hdr contains 4 bytes of icmp payload */
1308 rpl_print(ndo, icmp6_code, dp->icmp6_data, length-sizeof(struct icmp6_hdr)+4);
1309 break;
1310 default:
1311 ND_PRINT(", length %u", length);
1312 if (ndo->ndo_vflag <= 1)
1313 print_unknown_data(ndo, bp,"\n\t", length);
1314 return;
1315 }
1316 if (!ndo->ndo_vflag)
1317 ND_PRINT(", length %u", length);
1318 return;
1319 trunc:
1320 nd_print_trunc(ndo);
1321 }
1322
1323 static const struct udphdr *
1324 get_upperlayer(netdissect_options *ndo, const u_char *bp, u_int *prot)
1325 {
1326 const u_char *ep;
1327 const struct ip6_hdr *ip6 = (const struct ip6_hdr *)bp;
1328 const struct udphdr *uh;
1329 const struct ip6_hbh *hbh;
1330 const struct ip6_frag *fragh;
1331 const struct ah *ah;
1332 u_int nh;
1333 int hlen;
1334
1335 /* 'ep' points to the end of available data. */
1336 ep = ndo->ndo_snapend;
1337
1338 if (!ND_TTEST_1(ip6->ip6_nxt))
1339 return NULL;
1340
1341 nh = GET_U_1(ip6->ip6_nxt);
1342 hlen = sizeof(struct ip6_hdr);
1343
1344 while (bp < ep) {
1345 bp += hlen;
1346
1347 switch(nh) {
1348 case IPPROTO_UDP:
1349 case IPPROTO_TCP:
1350 uh = (const struct udphdr *)bp;
1351 if (ND_TTEST_2(uh->uh_dport)) {
1352 *prot = nh;
1353 return(uh);
1354 }
1355 else
1356 return(NULL);
1357 /* NOTREACHED */
1358
1359 case IPPROTO_HOPOPTS:
1360 case IPPROTO_DSTOPTS:
1361 case IPPROTO_ROUTING:
1362 hbh = (const struct ip6_hbh *)bp;
1363 if (!ND_TTEST_1(hbh->ip6h_len))
1364 return(NULL);
1365 nh = GET_U_1(hbh->ip6h_nxt);
1366 hlen = (GET_U_1(hbh->ip6h_len) + 1) << 3;
1367 break;
1368
1369 case IPPROTO_FRAGMENT: /* this should be odd, but try anyway */
1370 fragh = (const struct ip6_frag *)bp;
1371 if (!ND_TTEST_2(fragh->ip6f_offlg))
1372 return(NULL);
1373 /* fragments with non-zero offset are meaningless */
1374 if ((GET_BE_U_2(fragh->ip6f_offlg) & IP6F_OFF_MASK) != 0)
1375 return(NULL);
1376 nh = GET_U_1(fragh->ip6f_nxt);
1377 hlen = sizeof(struct ip6_frag);
1378 break;
1379
1380 case IPPROTO_AH:
1381 ah = (const struct ah *)bp;
1382 if (!ND_TTEST_1(ah->ah_len))
1383 return(NULL);
1384 nh = GET_U_1(ah->ah_nxt);
1385 hlen = (GET_U_1(ah->ah_len) + 2) << 2;
1386 break;
1387
1388 default: /* unknown or undecodable header */
1389 *prot = nh; /* meaningless, but set here anyway */
1390 return(NULL);
1391 }
1392 }
1393
1394 return(NULL); /* should be notreached, though */
1395 }
1396
1397 static int
1398 icmp6_opt_print(netdissect_options *ndo, const u_char *bp, int resid)
1399 {
1400 const struct nd_opt_hdr *op;
1401 uint8_t opt_type;
1402 u_int opt_len;
1403 const struct nd_opt_prefix_info *opp;
1404 const struct nd_opt_mtu *opm;
1405 const struct nd_opt_rdnss *oprd;
1406 const struct nd_opt_dnssl *opds;
1407 const struct nd_opt_advinterval *opa;
1408 const struct nd_opt_homeagent_info *oph;
1409 const struct nd_opt_route_info *opri;
1410 const u_char *cp, *ep, *domp;
1411 nd_ipv6 in6;
1412 size_t l;
1413 u_int i;
1414
1415 cp = bp;
1416 /* 'ep' points to the end of available data. */
1417 ep = ndo->ndo_snapend;
1418
1419 while (cp < ep) {
1420 op = (const struct nd_opt_hdr *)cp;
1421
1422 ND_TCHECK_1(op->nd_opt_len);
1423 if (resid <= 0)
1424 return 0;
1425 opt_type = GET_U_1(op->nd_opt_type);
1426 opt_len = GET_U_1(op->nd_opt_len);
1427 if (opt_len == 0)
1428 goto trunc;
1429 if (cp + (opt_len << 3) > ep)
1430 goto trunc;
1431
1432 ND_PRINT("\n\t %s option (%u), length %u (%u): ",
1433 tok2str(icmp6_opt_values, "unknown", opt_type),
1434 opt_type,
1435 opt_len << 3,
1436 opt_len);
1437
1438 switch (opt_type) {
1439 case ND_OPT_SOURCE_LINKADDR:
1440 l = (opt_len << 3) - 2;
1441 print_lladdr(ndo, cp + 2, l);
1442 break;
1443 case ND_OPT_TARGET_LINKADDR:
1444 l = (opt_len << 3) - 2;
1445 print_lladdr(ndo, cp + 2, l);
1446 break;
1447 case ND_OPT_PREFIX_INFORMATION:
1448 opp = (const struct nd_opt_prefix_info *)op;
1449 ND_PRINT("%s/%u%s, Flags [%s], valid time %s",
1450 GET_IP6ADDR_STRING(opp->nd_opt_pi_prefix),
1451 GET_U_1(opp->nd_opt_pi_prefix_len),
1452 (opt_len != 4) ? "badlen" : "",
1453 bittok2str(icmp6_opt_pi_flag_values, "none", GET_U_1(opp->nd_opt_pi_flags_reserved)),
1454 get_lifetime(GET_BE_U_4(opp->nd_opt_pi_valid_time)));
1455 ND_PRINT(", pref. time %s",
1456 get_lifetime(GET_BE_U_4(opp->nd_opt_pi_preferred_time)));
1457 break;
1458 case ND_OPT_REDIRECTED_HEADER:
1459 print_unknown_data(ndo, bp,"\n\t ",opt_len<<3);
1460 /* xxx */
1461 break;
1462 case ND_OPT_MTU:
1463 opm = (const struct nd_opt_mtu *)op;
1464 ND_PRINT(" %u%s",
1465 GET_BE_U_4(opm->nd_opt_mtu_mtu),
1466 (opt_len != 1) ? "bad option length" : "" );
1467 break;
1468 case ND_OPT_RDNSS:
1469 oprd = (const struct nd_opt_rdnss *)op;
1470 l = (opt_len - 1) / 2;
1471 ND_PRINT(" lifetime %us,",
1472 GET_BE_U_4(oprd->nd_opt_rdnss_lifetime));
1473 for (i = 0; i < l; i++) {
1474 ND_PRINT(" addr: %s",
1475 GET_IP6ADDR_STRING(oprd->nd_opt_rdnss_addr[i]));
1476 }
1477 break;
1478 case ND_OPT_DNSSL:
1479 opds = (const struct nd_opt_dnssl *)op;
1480 ND_PRINT(" lifetime %us, domain(s):",
1481 GET_BE_U_4(opds->nd_opt_dnssl_lifetime));
1482 domp = cp + 8; /* domain names, variable-sized, RFC1035-encoded */
1483 while (domp < cp + (opt_len << 3) && GET_U_1(domp) != '\0')
1484 {
1485 ND_PRINT(" ");
1486 if ((domp = fqdn_print(ndo, domp, bp)) == NULL)
1487 goto trunc;
1488 }
1489 break;
1490 case ND_OPT_ADVINTERVAL:
1491 opa = (const struct nd_opt_advinterval *)op;
1492 ND_PRINT(" %ums",
1493 GET_BE_U_4(opa->nd_opt_adv_interval));
1494 break;
1495 case ND_OPT_HOMEAGENT_INFO:
1496 oph = (const struct nd_opt_homeagent_info *)op;
1497 ND_PRINT(" preference %u, lifetime %u",
1498 GET_BE_U_2(oph->nd_opt_hai_preference),
1499 GET_BE_U_2(oph->nd_opt_hai_lifetime));
1500 break;
1501 case ND_OPT_ROUTE_INFO:
1502 opri = (const struct nd_opt_route_info *)op;
1503 ND_TCHECK_4(opri->nd_opt_rti_lifetime);
1504 memset(&in6, 0, sizeof(in6));
1505 switch (opt_len) {
1506 case 1:
1507 break;
1508 case 2:
1509 GET_CPY_BYTES(&in6, opri + 1, 8);
1510 break;
1511 case 3:
1512 GET_CPY_BYTES(&in6, opri + 1, 16);
1513 break;
1514 default:
1515 goto trunc;
1516 }
1517 ND_PRINT(" %s/%u", ip6addr_string(ndo, (const u_char *)&in6), /* local buffer, not packet data; don't use GET_IP6ADDR_STRING() */
1518 GET_U_1(opri->nd_opt_rti_prefixlen));
1519 ND_PRINT(", pref=%s",
1520 get_rtpref(GET_U_1(opri->nd_opt_rti_flags)));
1521 ND_PRINT(", lifetime=%s",
1522 get_lifetime(GET_BE_U_4(opri->nd_opt_rti_lifetime)));
1523 break;
1524 default:
1525 if (ndo->ndo_vflag <= 1) {
1526 print_unknown_data(ndo,cp+2,"\n\t ", (opt_len << 3) - 2); /* skip option header */
1527 return 0;
1528 }
1529 break;
1530 }
1531 /* do we want to see an additional hexdump ? */
1532 if (ndo->ndo_vflag> 1)
1533 print_unknown_data(ndo, cp+2,"\n\t ", (opt_len << 3) - 2); /* skip option header */
1534
1535 cp += opt_len << 3;
1536 resid -= opt_len << 3;
1537 }
1538 return 0;
1539
1540 trunc:
1541 return -1;
1542 }
1543
1544 static void
1545 mld6_print(netdissect_options *ndo, const u_char *bp)
1546 {
1547 const struct mld6_hdr *mp = (const struct mld6_hdr *)bp;
1548 const u_char *ep;
1549
1550 /* 'ep' points to the end of available data. */
1551 ep = ndo->ndo_snapend;
1552
1553 if ((const u_char *)mp + sizeof(*mp) > ep)
1554 return;
1555
1556 ND_PRINT("max resp delay: %u ", GET_BE_U_2(mp->mld6_maxdelay));
1557 ND_PRINT("addr: %s", GET_IP6ADDR_STRING(mp->mld6_addr));
1558 }
1559
1560 static void
1561 mldv2_report_print(netdissect_options *ndo, const u_char *bp, u_int len)
1562 {
1563 const struct icmp6_hdr *icp = (const struct icmp6_hdr *) bp;
1564 u_int group, nsrcs, ngroups;
1565 u_int i, j;
1566
1567 /* Minimum len is 8 */
1568 if (len < 8) {
1569 ND_PRINT(" [invalid len %u]", len);
1570 return;
1571 }
1572
1573 ngroups = GET_BE_U_2(icp->icmp6_data16[1]);
1574 ND_PRINT(", %u group record(s)", ngroups);
1575 if (ndo->ndo_vflag > 0) {
1576 /* Print the group records */
1577 group = 8;
1578 for (i = 0; i < ngroups; i++) {
1579 /* type(1) + auxlen(1) + numsrc(2) + grp(16) */
1580 if (len < group + 20) {
1581 ND_PRINT(" [invalid number of groups]");
1582 return;
1583 }
1584 ND_PRINT(" [gaddr %s", GET_IP6ADDR_STRING(bp + group + 4));
1585 ND_PRINT(" %s", tok2str(mldv2report2str, " [v2-report-#%u]",
1586 GET_U_1(bp + group)));
1587 nsrcs = GET_BE_U_2(bp + group + 2);
1588 /* Check the number of sources and print them */
1589 if (len < group + 20 + (nsrcs * sizeof(nd_ipv6))) {
1590 ND_PRINT(" [invalid number of sources %u]", nsrcs);
1591 return;
1592 }
1593 if (ndo->ndo_vflag == 1)
1594 ND_PRINT(", %u source(s)", nsrcs);
1595 else {
1596 /* Print the sources */
1597 ND_PRINT(" {");
1598 for (j = 0; j < nsrcs; j++) {
1599 ND_PRINT(" %s", GET_IP6ADDR_STRING(bp + group + 20 + (j * sizeof(nd_ipv6))));
1600 }
1601 ND_PRINT(" }");
1602 }
1603 /* Next group record */
1604 group += 20 + nsrcs * sizeof(nd_ipv6);
1605 ND_PRINT("]");
1606 }
1607 }
1608 }
1609
1610 static void
1611 mldv2_query_print(netdissect_options *ndo, const u_char *bp, u_int len)
1612 {
1613 const struct icmp6_hdr *icp = (const struct icmp6_hdr *) bp;
1614 u_int mrc;
1615 u_int mrt, qqi;
1616 u_int nsrcs;
1617 u_int i;
1618
1619 /* Minimum len is 28 */
1620 if (len < 28) {
1621 ND_PRINT(" [invalid len %u]", len);
1622 return;
1623 }
1624 mrc = GET_BE_U_2(icp->icmp6_data16[0]);
1625 if (mrc < 32768) {
1626 mrt = mrc;
1627 } else {
1628 mrt = ((mrc & 0x0fff) | 0x1000) << (((mrc & 0x7000) >> 12) + 3);
1629 }
1630 if (ndo->ndo_vflag) {
1631 ND_PRINT(" [max resp delay=%u]", mrt);
1632 }
1633 ND_PRINT(" [gaddr %s", GET_IP6ADDR_STRING(bp + 8));
1634
1635 if (ndo->ndo_vflag) {
1636 if (GET_U_1(bp + 24) & 0x08) {
1637 ND_PRINT(" sflag");
1638 }
1639 if (GET_U_1(bp + 24) & 0x07) {
1640 ND_PRINT(" robustness=%u", GET_U_1(bp + 24) & 0x07);
1641 }
1642 if (GET_U_1(bp + 25) < 128) {
1643 qqi = GET_U_1(bp + 25);
1644 } else {
1645 qqi = ((GET_U_1(bp + 25) & 0x0f) | 0x10) <<
1646 (((GET_U_1(bp + 25) & 0x70) >> 4) + 3);
1647 }
1648 ND_PRINT(" qqi=%u", qqi);
1649 }
1650
1651 nsrcs = GET_BE_U_2(bp + 26);
1652 if (nsrcs > 0) {
1653 if (len < 28 + nsrcs * sizeof(nd_ipv6))
1654 ND_PRINT(" [invalid number of sources]");
1655 else if (ndo->ndo_vflag > 1) {
1656 ND_PRINT(" {");
1657 for (i = 0; i < nsrcs; i++) {
1658 ND_PRINT(" %s", GET_IP6ADDR_STRING(bp + 28 + (i * sizeof(nd_ipv6))));
1659 }
1660 ND_PRINT(" }");
1661 } else
1662 ND_PRINT(", %u source(s)", nsrcs);
1663 }
1664 ND_PRINT("]");
1665 }
1666
1667 static void
1668 dnsname_print(netdissect_options *ndo, const u_char *cp, const u_char *ep)
1669 {
1670 int i;
1671
1672 /* DNS name decoding - no decompression */
1673 ND_PRINT(", \"");
1674 while (cp < ep) {
1675 i = GET_U_1(cp);
1676 cp++;
1677 if (i) {
1678 if (i > ep - cp) {
1679 ND_PRINT("???");
1680 break;
1681 }
1682 while (i-- && cp < ep) {
1683 fn_print_char(ndo, GET_U_1(cp));
1684 cp++;
1685 }
1686 if (cp + 1 < ep && GET_U_1(cp))
1687 ND_PRINT(".");
1688 } else {
1689 if (cp == ep) {
1690 /* FQDN */
1691 ND_PRINT(".");
1692 } else if (cp + 1 == ep && GET_U_1(cp) == '\0') {
1693 /* truncated */
1694 } else {
1695 /* invalid */
1696 ND_PRINT("???");
1697 }
1698 break;
1699 }
1700 }
1701 ND_PRINT("\"");
1702 }
1703
1704 static void
1705 icmp6_nodeinfo_print(netdissect_options *ndo, u_int icmp6len, const u_char *bp, const u_char *ep)
1706 {
1707 const struct icmp6_nodeinfo *ni6;
1708 const struct icmp6_hdr *dp;
1709 const u_char *cp;
1710 size_t siz, i;
1711 int needcomma;
1712
1713 if (ep < bp)
1714 return;
1715 dp = (const struct icmp6_hdr *)bp;
1716 ni6 = (const struct icmp6_nodeinfo *)bp;
1717 siz = ep - bp;
1718
1719 switch (GET_U_1(ni6->ni_type)) {
1720 case ICMP6_NI_QUERY:
1721 if (siz == sizeof(*dp) + 4) {
1722 /* KAME who-are-you */
1723 ND_PRINT(" who-are-you request");
1724 break;
1725 }
1726 ND_PRINT(" node information query");
1727
1728 ND_TCHECK_LEN(dp, sizeof(*ni6));
1729 ni6 = (const struct icmp6_nodeinfo *)dp;
1730 ND_PRINT(" ("); /*)*/
1731 switch (GET_BE_U_2(ni6->ni_qtype)) {
1732 case NI_QTYPE_NOOP:
1733 ND_PRINT("noop");
1734 break;
1735 case NI_QTYPE_SUPTYPES:
1736 ND_PRINT("supported qtypes");
1737 i = GET_BE_U_2(ni6->ni_flags);
1738 if (i)
1739 ND_PRINT(" [%s]", (i & 0x01) ? "C" : "");
1740 break;
1741 case NI_QTYPE_FQDN:
1742 ND_PRINT("DNS name");
1743 break;
1744 case NI_QTYPE_NODEADDR:
1745 ND_PRINT("node addresses");
1746 i = GET_BE_U_2(ni6->ni_flags);
1747 if (!i)
1748 break;
1749 /* NI_NODEADDR_FLAG_TRUNCATE undefined for query */
1750 ND_PRINT(" [%s%s%s%s%s%s]",
1751 (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
1752 (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
1753 (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
1754 (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
1755 (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
1756 (i & NI_NODEADDR_FLAG_ALL) ? "A" : "");
1757 break;
1758 default:
1759 ND_PRINT("unknown");
1760 break;
1761 }
1762
1763 if (GET_BE_U_2(ni6->ni_qtype) == NI_QTYPE_NOOP ||
1764 GET_BE_U_2(ni6->ni_qtype) == NI_QTYPE_SUPTYPES) {
1765 if (siz != sizeof(*ni6))
1766 if (ndo->ndo_vflag)
1767 ND_PRINT(", invalid len");
1768 /*(*/
1769 ND_PRINT(")");
1770 break;
1771 }
1772
1773 /* XXX backward compat, icmp-name-lookup-03 */
1774 if (siz == sizeof(*ni6)) {
1775 ND_PRINT(", 03 draft");
1776 /*(*/
1777 ND_PRINT(")");
1778 break;
1779 }
1780
1781 cp = (const u_char *)(ni6 + 1);
1782 switch (GET_U_1(ni6->ni_code)) {
1783 case ICMP6_NI_SUBJ_IPV6:
1784 if (!ND_TTEST_LEN(dp, sizeof(*ni6) + sizeof(nd_ipv6)))
1785 break;
1786 if (siz != sizeof(*ni6) + sizeof(nd_ipv6)) {
1787 if (ndo->ndo_vflag)
1788 ND_PRINT(", invalid subject len");
1789 break;
1790 }
1791 ND_PRINT(", subject=%s",
1792 GET_IP6ADDR_STRING(cp));
1793 break;
1794 case ICMP6_NI_SUBJ_FQDN:
1795 ND_PRINT(", subject=DNS name");
1796 if (GET_U_1(cp) == ep - cp - 1) {
1797 /* icmp-name-lookup-03, pascal string */
1798 if (ndo->ndo_vflag)
1799 ND_PRINT(", 03 draft");
1800 cp++;
1801 ND_PRINT(", \"");
1802 while (cp < ep) {
1803 fn_print_char(ndo, GET_U_1(cp));
1804 cp++;
1805 }
1806 ND_PRINT("\"");
1807 } else
1808 dnsname_print(ndo, cp, ep);
1809 break;
1810 case ICMP6_NI_SUBJ_IPV4:
1811 if (!ND_TTEST_LEN(dp, sizeof(*ni6) + sizeof(nd_ipv4)))
1812 break;
1813 if (siz != sizeof(*ni6) + sizeof(nd_ipv4)) {
1814 if (ndo->ndo_vflag)
1815 ND_PRINT(", invalid subject len");
1816 break;
1817 }
1818 ND_PRINT(", subject=%s",
1819 GET_IPADDR_STRING(cp));
1820 break;
1821 default:
1822 ND_PRINT(", unknown subject");
1823 break;
1824 }
1825
1826 /*(*/
1827 ND_PRINT(")");
1828 break;
1829
1830 case ICMP6_NI_REPLY:
1831 if (icmp6len > siz)
1832 goto trunc;
1833
1834 needcomma = 0;
1835
1836 ND_TCHECK_LEN(dp, sizeof(*ni6));
1837 ni6 = (const struct icmp6_nodeinfo *)dp;
1838 ND_PRINT(" node information reply");
1839 ND_PRINT(" ("); /*)*/
1840 switch (GET_U_1(ni6->ni_code)) {
1841 case ICMP6_NI_SUCCESS:
1842 if (ndo->ndo_vflag) {
1843 ND_PRINT("success");
1844 needcomma++;
1845 }
1846 break;
1847 case ICMP6_NI_REFUSED:
1848 ND_PRINT("refused");
1849 needcomma++;
1850 if (siz != sizeof(*ni6))
1851 if (ndo->ndo_vflag)
1852 ND_PRINT(", invalid length");
1853 break;
1854 case ICMP6_NI_UNKNOWN:
1855 ND_PRINT("unknown");
1856 needcomma++;
1857 if (siz != sizeof(*ni6))
1858 if (ndo->ndo_vflag)
1859 ND_PRINT(", invalid length");
1860 break;
1861 }
1862
1863 if (GET_U_1(ni6->ni_code) != ICMP6_NI_SUCCESS) {
1864 /*(*/
1865 ND_PRINT(")");
1866 break;
1867 }
1868
1869 switch (GET_BE_U_2(ni6->ni_qtype)) {
1870 case NI_QTYPE_NOOP:
1871 if (needcomma)
1872 ND_PRINT(", ");
1873 ND_PRINT("noop");
1874 if (siz != sizeof(*ni6))
1875 if (ndo->ndo_vflag)
1876 ND_PRINT(", invalid length");
1877 break;
1878 case NI_QTYPE_SUPTYPES:
1879 if (needcomma)
1880 ND_PRINT(", ");
1881 ND_PRINT("supported qtypes");
1882 i = GET_BE_U_2(ni6->ni_flags);
1883 if (i)
1884 ND_PRINT(" [%s]", (i & 0x01) ? "C" : "");
1885 break;
1886 case NI_QTYPE_FQDN:
1887 if (needcomma)
1888 ND_PRINT(", ");
1889 ND_PRINT("DNS name");
1890 cp = (const u_char *)(ni6 + 1) + 4;
1891 if (GET_U_1(cp) == ep - cp - 1) {
1892 /* icmp-name-lookup-03, pascal string */
1893 if (ndo->ndo_vflag)
1894 ND_PRINT(", 03 draft");
1895 cp++;
1896 ND_PRINT(", \"");
1897 while (cp < ep) {
1898 fn_print_char(ndo, GET_U_1(cp));
1899 cp++;
1900 }
1901 ND_PRINT("\"");
1902 } else
1903 dnsname_print(ndo, cp, ep);
1904 if ((GET_BE_U_2(ni6->ni_flags) & 0x01) != 0)
1905 ND_PRINT(" [TTL=%u]", GET_BE_U_4(ni6 + 1));
1906 break;
1907 case NI_QTYPE_NODEADDR:
1908 if (needcomma)
1909 ND_PRINT(", ");
1910 ND_PRINT("node addresses");
1911 i = sizeof(*ni6);
1912 while (i < siz) {
1913 if (i + sizeof(uint32_t) + sizeof(nd_ipv6) > siz)
1914 break;
1915 ND_PRINT(" %s(%u)",
1916 GET_IP6ADDR_STRING(bp + i + sizeof(uint32_t)),
1917 GET_BE_U_4(bp + i));
1918 i += sizeof(uint32_t) + sizeof(nd_ipv6);
1919 }
1920 i = GET_BE_U_2(ni6->ni_flags);
1921 if (!i)
1922 break;
1923 ND_PRINT(" [%s%s%s%s%s%s%s]",
1924 (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
1925 (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
1926 (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
1927 (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
1928 (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
1929 (i & NI_NODEADDR_FLAG_ALL) ? "A" : "",
1930 (i & NI_NODEADDR_FLAG_TRUNCATE) ? "T" : "");
1931 break;
1932 default:
1933 if (needcomma)
1934 ND_PRINT(", ");
1935 ND_PRINT("unknown");
1936 break;
1937 }
1938
1939 /*(*/
1940 ND_PRINT(")");
1941 break;
1942 }
1943 return;
1944
1945 trunc:
1946 nd_print_trunc(ndo);
1947 }
1948
1949 static void
1950 icmp6_rrenum_print(netdissect_options *ndo, const u_char *bp, const u_char *ep)
1951 {
1952 const struct icmp6_router_renum *rr6;
1953 const char *cp;
1954 const struct rr_pco_match *match;
1955 const struct rr_pco_use *use;
1956 char hbuf[NI_MAXHOST];
1957 int n;
1958
1959 if (ep < bp)
1960 return;
1961 rr6 = (const struct icmp6_router_renum *)bp;
1962 cp = (const char *)(rr6 + 1);
1963
1964 ND_TCHECK_4(rr6->rr_reserved);
1965 switch (GET_U_1(rr6->rr_code)) {
1966 case ICMP6_ROUTER_RENUMBERING_COMMAND:
1967 ND_PRINT("router renum: command");
1968 break;
1969 case ICMP6_ROUTER_RENUMBERING_RESULT:
1970 ND_PRINT("router renum: result");
1971 break;
1972 case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET:
1973 ND_PRINT("router renum: sequence number reset");
1974 break;
1975 default:
1976 ND_PRINT("router renum: code-#%u", GET_U_1(rr6->rr_code));
1977 break;
1978 }
1979
1980 ND_PRINT(", seq=%u", GET_BE_U_4(rr6->rr_seqnum));
1981
1982 if (ndo->ndo_vflag) {
1983 uint8_t rr_flags = GET_U_1(rr6->rr_flags);
1984 #define F(x, y) (rr_flags & (x) ? (y) : "")
1985 ND_PRINT("["); /*]*/
1986 if (rr_flags) {
1987 ND_PRINT("%s%s%s%s%s,", F(ICMP6_RR_FLAGS_TEST, "T"),
1988 F(ICMP6_RR_FLAGS_REQRESULT, "R"),
1989 F(ICMP6_RR_FLAGS_FORCEAPPLY, "A"),
1990 F(ICMP6_RR_FLAGS_SPECSITE, "S"),
1991 F(ICMP6_RR_FLAGS_PREVDONE, "P"));
1992 }
1993 ND_PRINT("seg=%u,", GET_U_1(rr6->rr_segnum));
1994 ND_PRINT("maxdelay=%u", GET_BE_U_2(rr6->rr_maxdelay));
1995 if (GET_BE_U_4(rr6->rr_reserved))
1996 ND_PRINT("rsvd=0x%x", GET_BE_U_4(rr6->rr_reserved));
1997 /*[*/
1998 ND_PRINT("]");
1999 #undef F
2000 }
2001
2002 if (GET_U_1(rr6->rr_code) == ICMP6_ROUTER_RENUMBERING_COMMAND) {
2003 match = (const struct rr_pco_match *)cp;
2004 cp = (const char *)(match + 1);
2005
2006 ND_TCHECK_16(match->rpm_prefix);
2007
2008 if (ndo->ndo_vflag > 1)
2009 ND_PRINT("\n\t");
2010 else
2011 ND_PRINT(" ");
2012 ND_PRINT("match("); /*)*/
2013 switch (GET_U_1(match->rpm_code)) {
2014 case RPM_PCO_ADD: ND_PRINT("add"); break;
2015 case RPM_PCO_CHANGE: ND_PRINT("change"); break;
2016 case RPM_PCO_SETGLOBAL: ND_PRINT("setglobal"); break;
2017 default: ND_PRINT("#%u",
2018 GET_U_1(match->rpm_code)); break;
2019 }
2020
2021 if (ndo->ndo_vflag) {
2022 ND_PRINT(",ord=%u", GET_U_1(match->rpm_ordinal));
2023 ND_PRINT(",min=%u", GET_U_1(match->rpm_minlen));
2024 ND_PRINT(",max=%u", GET_U_1(match->rpm_maxlen));
2025 }
2026 if (addrtostr6(match->rpm_prefix, hbuf, sizeof(hbuf)))
2027 ND_PRINT(",%s/%u", hbuf, GET_U_1(match->rpm_matchlen));
2028 else
2029 ND_PRINT(",?/%u", GET_U_1(match->rpm_matchlen));
2030 /*(*/
2031 ND_PRINT(")");
2032
2033 n = GET_U_1(match->rpm_len) - 3;
2034 if (n % 4)
2035 goto trunc;
2036 n /= 4;
2037 while (n-- > 0) {
2038 use = (const struct rr_pco_use *)cp;
2039 cp = (const char *)(use + 1);
2040
2041 ND_TCHECK_16(use->rpu_prefix);
2042
2043 if (ndo->ndo_vflag > 1)
2044 ND_PRINT("\n\t");
2045 else
2046 ND_PRINT(" ");
2047 ND_PRINT("use("); /*)*/
2048 if (GET_U_1(use->rpu_flags)) {
2049 #define F(x, y) (GET_U_1(use->rpu_flags) & (x) ? (y) : "")
2050 ND_PRINT("%s%s,",
2051 F(ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME, "V"),
2052 F(ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME, "P"));
2053 #undef F
2054 }
2055 if (ndo->ndo_vflag) {
2056 ND_PRINT("mask=0x%x,",
2057 GET_U_1(use->rpu_ramask));
2058 ND_PRINT("raflags=0x%x,",
2059 GET_U_1(use->rpu_raflags));
2060 if (GET_BE_U_4(use->rpu_vltime) == 0xffffffff)
2061 ND_PRINT("vltime=infty,");
2062 else
2063 ND_PRINT("vltime=%u,",
2064 GET_BE_U_4(use->rpu_vltime));
2065 if (GET_BE_U_4(use->rpu_pltime) == 0xffffffff)
2066 ND_PRINT("pltime=infty,");
2067 else
2068 ND_PRINT("pltime=%u,",
2069 GET_BE_U_4(use->rpu_pltime));
2070 }
2071 if (addrtostr6(use->rpu_prefix, hbuf, sizeof(hbuf)))
2072 ND_PRINT("%s/%u/%u", hbuf,
2073 GET_U_1(use->rpu_uselen),
2074 GET_U_1(use->rpu_keeplen));
2075 else
2076 ND_PRINT("?/%u/%u", GET_U_1(use->rpu_uselen),
2077 GET_U_1(use->rpu_keeplen));
2078 /*(*/
2079 ND_PRINT(")");
2080 }
2081 }
2082
2083 return;
2084
2085 trunc:
2086 nd_print_trunc(ndo);
2087 }
[mirror] the TCPdump network dissector