?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
kernel: avoid possible sysctl integer overflow in acpi_thinkpad(4)
[dragonfly.git] / contrib / tcpdump / print-icmp6.c
blob5cef0efabd5fe78fd0ef92b218eb518f24fcf597
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 static const char icmp6_tstr[] = " [|icmp6]";
45 static const char rpl_tstr[] = " [|rpl]";
46 static const char mldv2_tstr[] = " [|mldv2]";
47
48 /* NetBSD: icmp6.h,v 1.13 2000/08/03 16:30:37 itojun Exp */
49 /* $KAME: icmp6.h,v 1.22 2000/08/03 15:25:16 jinmei Exp $ */
50
51 /*
52 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
53 * All rights reserved.
54 *
55 * Redistribution and use in source and binary forms, with or without
56 * modification, are permitted provided that the following conditions
57 * are met:
58 * 1. Redistributions of source code must retain the above copyright
59 * notice, this list of conditions and the following disclaimer.
60 * 2. Redistributions in binary form must reproduce the above copyright
61 * notice, this list of conditions and the following disclaimer in the
62 * documentation and/or other materials provided with the distribution.
63 * 3. Neither the name of the project nor the names of its contributors
64 * may be used to endorse or promote products derived from this software
65 * without specific prior written permission.
66 *
67 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
68 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
69 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
70 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
71 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
72 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
73 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
74 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
75 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
76 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
77 * SUCH DAMAGE.
78 */
79
80 struct icmp6_hdr {
81 uint8_t icmp6_type; /* type field */
82 uint8_t icmp6_code; /* code field */
83 uint16_t icmp6_cksum; /* checksum field */
84 union {
85 uint32_t icmp6_un_data32[1]; /* type-specific field */
86 uint16_t icmp6_un_data16[2]; /* type-specific field */
87 uint8_t icmp6_un_data8[4]; /* type-specific field */
88 } icmp6_dataun;
89 };
90
91 #define icmp6_data32 icmp6_dataun.icmp6_un_data32
92 #define icmp6_data16 icmp6_dataun.icmp6_un_data16
93 #define icmp6_data8 icmp6_dataun.icmp6_un_data8
94 #define icmp6_pptr icmp6_data32[0] /* parameter prob */
95 #define icmp6_mtu icmp6_data32[0] /* packet too big */
96 #define icmp6_id icmp6_data16[0] /* echo request/reply */
97 #define icmp6_seq icmp6_data16[1] /* echo request/reply */
98 #define icmp6_maxdelay icmp6_data16[0] /* mcast group membership */
99
100 #define ICMP6_DST_UNREACH 1 /* dest unreachable, codes: */
101 #define ICMP6_PACKET_TOO_BIG 2 /* packet too big */
102 #define ICMP6_TIME_EXCEEDED 3 /* time exceeded, code: */
103 #define ICMP6_PARAM_PROB 4 /* ip6 header bad */
104
105 #define ICMP6_ECHO_REQUEST 128 /* echo service */
106 #define ICMP6_ECHO_REPLY 129 /* echo reply */
107 #define ICMP6_MEMBERSHIP_QUERY 130 /* group membership query */
108 #define MLD6_LISTENER_QUERY 130 /* multicast listener query */
109 #define ICMP6_MEMBERSHIP_REPORT 131 /* group membership report */
110 #define MLD6_LISTENER_REPORT 131 /* multicast listener report */
111 #define ICMP6_MEMBERSHIP_REDUCTION 132 /* group membership termination */
112 #define MLD6_LISTENER_DONE 132 /* multicast listener done */
113
114 #define ND_ROUTER_SOLICIT 133 /* router solicitation */
115 #define ND_ROUTER_ADVERT 134 /* router advertisement */
116 #define ND_NEIGHBOR_SOLICIT 135 /* neighbor solicitation */
117 #define ND_NEIGHBOR_ADVERT 136 /* neighbor advertisement */
118 #define ND_REDIRECT 137 /* redirect */
119
120 #define ICMP6_ROUTER_RENUMBERING 138 /* router renumbering */
121
122 #define ICMP6_WRUREQUEST 139 /* who are you request */
123 #define ICMP6_WRUREPLY 140 /* who are you reply */
124 #define ICMP6_FQDN_QUERY 139 /* FQDN query */
125 #define ICMP6_FQDN_REPLY 140 /* FQDN reply */
126 #define ICMP6_NI_QUERY 139 /* node information request */
127 #define ICMP6_NI_REPLY 140 /* node information reply */
128 #define IND_SOLICIT 141 /* inverse neighbor solicitation */
129 #define IND_ADVERT 142 /* inverse neighbor advertisement */
130
131 #define ICMP6_V2_MEMBERSHIP_REPORT 143 /* v2 membership report */
132 #define MLDV2_LISTENER_REPORT 143 /* v2 multicast listener report */
133 #define ICMP6_HADISCOV_REQUEST 144
134 #define ICMP6_HADISCOV_REPLY 145
135 #define ICMP6_MOBILEPREFIX_SOLICIT 146
136 #define ICMP6_MOBILEPREFIX_ADVERT 147
137
138 #define MLD6_MTRACE_RESP 200 /* mtrace response(to sender) */
139 #define MLD6_MTRACE 201 /* mtrace messages */
140
141 #define ICMP6_MAXTYPE 201
142
143 #define ICMP6_DST_UNREACH_NOROUTE 0 /* no route to destination */
144 #define ICMP6_DST_UNREACH_ADMIN 1 /* administratively prohibited */
145 #define ICMP6_DST_UNREACH_NOTNEIGHBOR 2 /* not a neighbor(obsolete) */
146 #define ICMP6_DST_UNREACH_BEYONDSCOPE 2 /* beyond scope of source address */
147 #define ICMP6_DST_UNREACH_ADDR 3 /* address unreachable */
148 #define ICMP6_DST_UNREACH_NOPORT 4 /* port unreachable */
149
150 #define ICMP6_TIME_EXCEED_TRANSIT 0 /* ttl==0 in transit */
151 #define ICMP6_TIME_EXCEED_REASSEMBLY 1 /* ttl==0 in reass */
152
153 #define ICMP6_PARAMPROB_HEADER 0 /* erroneous header field */
154 #define ICMP6_PARAMPROB_NEXTHEADER 1 /* unrecognized next header */
155 #define ICMP6_PARAMPROB_OPTION 2 /* unrecognized option */
156
157 #define ICMP6_INFOMSG_MASK 0x80 /* all informational messages */
158
159 #define ICMP6_NI_SUBJ_IPV6 0 /* Query Subject is an IPv6 address */
160 #define ICMP6_NI_SUBJ_FQDN 1 /* Query Subject is a Domain name */
161 #define ICMP6_NI_SUBJ_IPV4 2 /* Query Subject is an IPv4 address */
162
163 #define ICMP6_NI_SUCCESS 0 /* node information successful reply */
164 #define ICMP6_NI_REFUSED 1 /* node information request is refused */
165 #define ICMP6_NI_UNKNOWN 2 /* unknown Qtype */
166
167 #define ICMP6_ROUTER_RENUMBERING_COMMAND 0 /* rr command */
168 #define ICMP6_ROUTER_RENUMBERING_RESULT 1 /* rr result */
169 #define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET 255 /* rr seq num reset */
170
171 /* Used in kernel only */
172 #define ND_REDIRECT_ONLINK 0 /* redirect to an on-link node */
173 #define ND_REDIRECT_ROUTER 1 /* redirect to a better router */
174
175 /*
176 * Multicast Listener Discovery
177 */
178 struct mld6_hdr {
179 struct icmp6_hdr mld6_hdr;
180 struct in6_addr mld6_addr; /* multicast address */
181 };
182
183 #define mld6_type mld6_hdr.icmp6_type
184 #define mld6_code mld6_hdr.icmp6_code
185 #define mld6_cksum mld6_hdr.icmp6_cksum
186 #define mld6_maxdelay mld6_hdr.icmp6_data16[0]
187 #define mld6_reserved mld6_hdr.icmp6_data16[1]
188
189 #define MLD_MINLEN 24
190 #define MLDV2_MINLEN 28
191
192 /*
193 * Neighbor Discovery
194 */
195
196 struct nd_router_solicit { /* router solicitation */
197 struct icmp6_hdr nd_rs_hdr;
198 /* could be followed by options */
199 };
200
201 #define nd_rs_type nd_rs_hdr.icmp6_type
202 #define nd_rs_code nd_rs_hdr.icmp6_code
203 #define nd_rs_cksum nd_rs_hdr.icmp6_cksum
204 #define nd_rs_reserved nd_rs_hdr.icmp6_data32[0]
205
206 struct nd_router_advert { /* router advertisement */
207 struct icmp6_hdr nd_ra_hdr;
208 uint32_t nd_ra_reachable; /* reachable time */
209 uint32_t nd_ra_retransmit; /* retransmit timer */
210 /* could be followed by options */
211 };
212
213 #define nd_ra_type nd_ra_hdr.icmp6_type
214 #define nd_ra_code nd_ra_hdr.icmp6_code
215 #define nd_ra_cksum nd_ra_hdr.icmp6_cksum
216 #define nd_ra_curhoplimit nd_ra_hdr.icmp6_data8[0]
217 #define nd_ra_flags_reserved nd_ra_hdr.icmp6_data8[1]
218 #define ND_RA_FLAG_MANAGED 0x80
219 #define ND_RA_FLAG_OTHER 0x40
220 #define ND_RA_FLAG_HOME_AGENT 0x20
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 struct in6_addr 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 struct in6_addr 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 struct in6_addr nd_rd_target; /* target address */
264 struct in6_addr 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 uint8_t nd_opt_type;
275 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 struct in6_addr 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 uint8_t nd_opt_rh_type;
307 uint8_t nd_opt_rh_len;
308 uint16_t nd_opt_rh_reserved1;
309 uint32_t nd_opt_rh_reserved2;
310 /* followed by IP header and data */
311 };
312
313 struct nd_opt_mtu { /* MTU option */
314 uint8_t nd_opt_mtu_type;
315 uint8_t nd_opt_mtu_len;
316 uint16_t nd_opt_mtu_reserved;
317 uint32_t nd_opt_mtu_mtu;
318 };
319
320 struct nd_opt_rdnss { /* RDNSS RFC 6106 5.1 */
321 uint8_t nd_opt_rdnss_type;
322 uint8_t nd_opt_rdnss_len;
323 uint16_t nd_opt_rdnss_reserved;
324 uint32_t nd_opt_rdnss_lifetime;
325 struct in6_addr nd_opt_rdnss_addr[1]; /* variable-length */
326 };
327
328 struct nd_opt_dnssl { /* DNSSL RFC 6106 5.2 */
329 uint8_t nd_opt_dnssl_type;
330 uint8_t nd_opt_dnssl_len;
331 uint16_t nd_opt_dnssl_reserved;
332 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 uint8_t nd_opt_adv_type;
338 uint8_t nd_opt_adv_len;
339 uint16_t nd_opt_adv_reserved;
340 uint32_t nd_opt_adv_interval;
341 };
342
343 struct nd_opt_homeagent_info { /* Home Agent info */
344 uint8_t nd_opt_hai_type;
345 uint8_t nd_opt_hai_len;
346 uint16_t nd_opt_hai_reserved;
347 int16_t nd_opt_hai_preference;
348 uint16_t nd_opt_hai_lifetime;
349 };
350
351 struct nd_opt_route_info { /* route info */
352 uint8_t nd_opt_rti_type;
353 uint8_t nd_opt_rti_len;
354 uint8_t nd_opt_rti_prefixlen;
355 uint8_t nd_opt_rti_flags;
356 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 uint8_t icmp6_nl_nonce[8];
367 int32_t icmp6_nl_ttl;
368 #if 0
369 uint8_t icmp6_nl_len;
370 uint8_t 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 uint8_t 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 */
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 uint32_t ni_fqdn_ttl; /* TTL */
412 uint8_t ni_fqdn_namelen; /* length in octets of the FQDN */
413 uint8_t 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 uint8_t rr_segnum;
422 uint8_t rr_flags;
423 uint16_t rr_maxdelay;
424 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 uint8_t rpm_code;
439 uint8_t rpm_len;
440 uint8_t rpm_ordinal;
441 uint8_t rpm_matchlen;
442 uint8_t rpm_minlen;
443 uint8_t rpm_maxlen;
444 uint16_t rpm_reserved;
445 struct in6_addr 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 uint8_t rpu_uselen;
455 uint8_t rpu_keeplen;
456 uint8_t rpu_ramask;
457 uint8_t rpu_raflags;
458 uint32_t rpu_vltime;
459 uint32_t rpu_pltime;
460 uint32_t rpu_flags;
461 struct in6_addr 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 uint16_t rrr_flags;
472 uint8_t rrr_ordinal;
473 uint8_t rrr_matchedlen;
474 uint32_t rrr_ifid;
475 struct in6_addr 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 void 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 #ifndef abs
494 #define abs(a) ((0 < (a)) ? (a) : -(a))
495 #endif
496
497 #include "rpl.h"
498
499 static const struct tok icmp6_type_values[] = {
500 { ICMP6_DST_UNREACH, "destination unreachable"},
501 { ICMP6_PACKET_TOO_BIG, "packet too big"},
502 { ICMP6_TIME_EXCEEDED, "time exceeded in-transit"},
503 { ICMP6_PARAM_PROB, "parameter problem"},
504 { ICMP6_ECHO_REQUEST, "echo request"},
505 { ICMP6_ECHO_REPLY, "echo reply"},
506 { MLD6_LISTENER_QUERY, "multicast listener query"},
507 { MLD6_LISTENER_REPORT, "multicast listener report"},
508 { MLD6_LISTENER_DONE, "multicast listener done"},
509 { ND_ROUTER_SOLICIT, "router solicitation"},
510 { ND_ROUTER_ADVERT, "router advertisement"},
511 { ND_NEIGHBOR_SOLICIT, "neighbor solicitation"},
512 { ND_NEIGHBOR_ADVERT, "neighbor advertisement"},
513 { ND_REDIRECT, "redirect"},
514 { ICMP6_ROUTER_RENUMBERING, "router renumbering"},
515 { IND_SOLICIT, "inverse neighbor solicitation"},
516 { IND_ADVERT, "inverse neighbor advertisement"},
517 { MLDV2_LISTENER_REPORT, "multicast listener report v2"},
518 { ICMP6_HADISCOV_REQUEST, "ha discovery request"},
519 { ICMP6_HADISCOV_REPLY, "ha discovery reply"},
520 { ICMP6_MOBILEPREFIX_SOLICIT, "mobile router solicitation"},
521 { ICMP6_MOBILEPREFIX_ADVERT, "mobile router advertisement"},
522 { ICMP6_WRUREQUEST, "who-are-you request"},
523 { ICMP6_WRUREPLY, "who-are-you reply"},
524 { ICMP6_NI_QUERY, "node information query"},
525 { ICMP6_NI_REPLY, "node information reply"},
526 { MLD6_MTRACE, "mtrace message"},
527 { MLD6_MTRACE_RESP, "mtrace response"},
528 { ND_RPL_MESSAGE, "RPL"},
529 { 0, NULL }
530 };
531
532 static const struct tok icmp6_dst_unreach_code_values[] = {
533 { ICMP6_DST_UNREACH_NOROUTE, "unreachable route" },
534 { ICMP6_DST_UNREACH_ADMIN, " unreachable prohibited"},
535 { ICMP6_DST_UNREACH_BEYONDSCOPE, "beyond scope"},
536 { ICMP6_DST_UNREACH_ADDR, "unreachable address"},
537 { ICMP6_DST_UNREACH_NOPORT, "unreachable port"},
538 { 0, NULL }
539 };
540
541 static const struct tok icmp6_opt_pi_flag_values[] = {
542 { ND_OPT_PI_FLAG_ONLINK, "onlink" },
543 { ND_OPT_PI_FLAG_AUTO, "auto" },
544 { ND_OPT_PI_FLAG_ROUTER, "router" },
545 { 0, NULL }
546 };
547
548 static const struct tok icmp6_opt_ra_flag_values[] = {
549 { ND_RA_FLAG_MANAGED, "managed" },
550 { ND_RA_FLAG_OTHER, "other stateful"},
551 { ND_RA_FLAG_HOME_AGENT, "home agent"},
552 { 0, NULL }
553 };
554
555 static const struct tok icmp6_nd_na_flag_values[] = {
556 { ND_NA_FLAG_ROUTER, "router" },
557 { ND_NA_FLAG_SOLICITED, "solicited" },
558 { ND_NA_FLAG_OVERRIDE, "override" },
559 { 0, NULL }
560 };
561
562
563 static const struct tok icmp6_opt_values[] = {
564 { ND_OPT_SOURCE_LINKADDR, "source link-address"},
565 { ND_OPT_TARGET_LINKADDR, "destination link-address"},
566 { ND_OPT_PREFIX_INFORMATION, "prefix info"},
567 { ND_OPT_REDIRECTED_HEADER, "redirected header"},
568 { ND_OPT_MTU, "mtu"},
569 { ND_OPT_RDNSS, "rdnss"},
570 { ND_OPT_DNSSL, "dnssl"},
571 { ND_OPT_ADVINTERVAL, "advertisement interval"},
572 { ND_OPT_HOMEAGENT_INFO, "homeagent information"},
573 { ND_OPT_ROUTE_INFO, "route info"},
574 { 0, NULL }
575 };
576
577 /* mldv2 report types */
578 static const struct tok mldv2report2str[] = {
579 { 1, "is_in" },
580 { 2, "is_ex" },
581 { 3, "to_in" },
582 { 4, "to_ex" },
583 { 5, "allow" },
584 { 6, "block" },
585 { 0, NULL }
586 };
587
588 static const char *
589 get_rtpref(u_int v)
590 {
591 static const char *rtpref_str[] = {
592 "medium", /* 00 */
593 "high", /* 01 */
594 "rsv", /* 10 */
595 "low" /* 11 */
596 };
597
598 return rtpref_str[((v & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff];
599 }
600
601 static const char *
602 get_lifetime(uint32_t v)
603 {
604 static char buf[20];
605
606 if (v == (uint32_t)~0UL)
607 return "infinity";
608 else {
609 snprintf(buf, sizeof(buf), "%us", v);
610 return buf;
611 }
612 }
613
614 static void
615 print_lladdr(netdissect_options *ndo, const uint8_t *p, size_t l)
616 {
617 const uint8_t *ep, *q;
618
619 q = p;
620 ep = p + l;
621 while (l > 0 && q < ep) {
622 if (q > p)
623 ND_PRINT((ndo,":"));
624 ND_PRINT((ndo,"%02x", *q++));
625 l--;
626 }
627 }
628
629 static int icmp6_cksum(netdissect_options *ndo, const struct ip6_hdr *ip6,
630 const struct icmp6_hdr *icp, u_int len)
631 {
632 return nextproto6_cksum(ndo, ip6, (const uint8_t *)(const void *)icp, len, len,
633 IPPROTO_ICMPV6);
634 }
635
636 static const struct tok rpl_mop_values[] = {
637 { RPL_DIO_NONSTORING, "nonstoring"},
638 { RPL_DIO_STORING, "storing"},
639 { RPL_DIO_NONSTORING_MULTICAST, "nonstoring-multicast"},
640 { RPL_DIO_STORING_MULTICAST, "storing-multicast"},
641 { 0, NULL},
642 };
643
644 static const struct tok rpl_subopt_values[] = {
645 { RPL_OPT_PAD0, "pad0"},
646 { RPL_OPT_PADN, "padN"},
647 { RPL_DIO_METRICS, "metrics"},
648 { RPL_DIO_ROUTINGINFO, "routinginfo"},
649 { RPL_DIO_CONFIG, "config"},
650 { RPL_DAO_RPLTARGET, "rpltarget"},
651 { RPL_DAO_TRANSITINFO, "transitinfo"},
652 { RPL_DIO_DESTPREFIX, "destprefix"},
653 { RPL_DAO_RPLTARGET_DESC, "rpltargetdesc"},
654 { 0, NULL},
655 };
656
657 static void
658 rpl_dio_printopt(netdissect_options *ndo,
659 const struct rpl_dio_genoption *opt,
660 u_int length)
661 {
662 if(length < RPL_DIO_GENOPTION_LEN) return;
663 length -= RPL_DIO_GENOPTION_LEN;
664
665 ND_TCHECK(opt->rpl_dio_len);
666
667 while((opt->rpl_dio_type == RPL_OPT_PAD0 &&
668 (const u_char *)opt < ndo->ndo_snapend) ||
669 ND_TTEST2(*opt,(opt->rpl_dio_len+2))) {
670
671 unsigned int optlen = opt->rpl_dio_len+2;
672 if(opt->rpl_dio_type == RPL_OPT_PAD0) {
673 optlen = 1;
674 ND_PRINT((ndo, " opt:pad0"));
675 } else {
676 ND_PRINT((ndo, " opt:%s len:%u ",
677 tok2str(rpl_subopt_values, "subopt:%u", opt->rpl_dio_type),
678 optlen));
679 if(ndo->ndo_vflag > 2) {
680 unsigned int paylen = opt->rpl_dio_len;
681 if(paylen > length) paylen = length;
682 hex_print(ndo,
683 " ",
684 ((const uint8_t *)opt) + RPL_DIO_GENOPTION_LEN, /* content of DIO option */
685 paylen);
686 }
687 }
688 opt = (const struct rpl_dio_genoption *)(((const char *)opt) + optlen);
689 length -= optlen;
690 ND_TCHECK(opt->rpl_dio_len);
691 }
692 return;
693 trunc:
694 ND_PRINT((ndo, "%s", rpl_tstr));
695 return;
696 }
697
698 static void
699 rpl_dio_print(netdissect_options *ndo,
700 const u_char *bp, u_int length)
701 {
702 const struct nd_rpl_dio *dio = (const struct nd_rpl_dio *)bp;
703 const char *dagid_str;
704
705 ND_TCHECK(*dio);
706 dagid_str = ip6addr_string (ndo, dio->rpl_dagid);
707
708 ND_PRINT((ndo, " [dagid:%s,seq:%u,instance:%u,rank:%u,%smop:%s,prf:%u]",
709 dagid_str,
710 dio->rpl_dtsn,
711 dio->rpl_instanceid,
712 EXTRACT_16BITS(&dio->rpl_dagrank),
713 RPL_DIO_GROUNDED(dio->rpl_mopprf) ? "grounded,":"",
714 tok2str(rpl_mop_values, "mop%u", RPL_DIO_MOP(dio->rpl_mopprf)),
715 RPL_DIO_PRF(dio->rpl_mopprf)));
716
717 if(ndo->ndo_vflag > 1) {
718 const struct rpl_dio_genoption *opt = (const struct rpl_dio_genoption *)&dio[1];
719 rpl_dio_printopt(ndo, opt, length);
720 }
721 return;
722 trunc:
723 ND_PRINT((ndo, "%s", rpl_tstr));
724 return;
725 }
726
727 static void
728 rpl_dao_print(netdissect_options *ndo,
729 const u_char *bp, u_int length)
730 {
731 const struct nd_rpl_dao *dao = (const struct nd_rpl_dao *)bp;
732 const char *dagid_str = "<elided>";
733
734 ND_TCHECK(*dao);
735 if (length < ND_RPL_DAO_MIN_LEN)
736 goto tooshort;
737
738 bp += ND_RPL_DAO_MIN_LEN;
739 length -= ND_RPL_DAO_MIN_LEN;
740 if(RPL_DAO_D(dao->rpl_flags)) {
741 ND_TCHECK2(dao->rpl_dagid, DAGID_LEN);
742 if (length < DAGID_LEN)
743 goto tooshort;
744 dagid_str = ip6addr_string (ndo, dao->rpl_dagid);
745 bp += DAGID_LEN;
746 length -= DAGID_LEN;
747 }
748
749 ND_PRINT((ndo, " [dagid:%s,seq:%u,instance:%u%s%s,%02x]",
750 dagid_str,
751 dao->rpl_daoseq,
752 dao->rpl_instanceid,
753 RPL_DAO_K(dao->rpl_flags) ? ",acK":"",
754 RPL_DAO_D(dao->rpl_flags) ? ",Dagid":"",
755 dao->rpl_flags));
756
757 if(ndo->ndo_vflag > 1) {
758 const struct rpl_dio_genoption *opt = (const struct rpl_dio_genoption *)bp;
759 rpl_dio_printopt(ndo, opt, length);
760 }
761 return;
762
763 trunc:
764 ND_PRINT((ndo, "%s", rpl_tstr));
765 return;
766
767 tooshort:
768 ND_PRINT((ndo," [|length too short]"));
769 return;
770 }
771
772 static void
773 rpl_daoack_print(netdissect_options *ndo,
774 const u_char *bp, u_int length)
775 {
776 const struct nd_rpl_daoack *daoack = (const struct nd_rpl_daoack *)bp;
777 const char *dagid_str = "<elided>";
778
779 ND_TCHECK2(*daoack, ND_RPL_DAOACK_MIN_LEN);
780 if (length < ND_RPL_DAOACK_MIN_LEN)
781 goto tooshort;
782
783 bp += ND_RPL_DAOACK_MIN_LEN;
784 length -= ND_RPL_DAOACK_MIN_LEN;
785 if(RPL_DAOACK_D(daoack->rpl_flags)) {
786 ND_TCHECK2(daoack->rpl_dagid, DAGID_LEN);
787 if (length < DAGID_LEN)
788 goto tooshort;
789 dagid_str = ip6addr_string (ndo, daoack->rpl_dagid);
790 bp += DAGID_LEN;
791 length -= DAGID_LEN;
792 }
793
794 ND_PRINT((ndo, " [dagid:%s,seq:%u,instance:%u,status:%u]",
795 dagid_str,
796 daoack->rpl_daoseq,
797 daoack->rpl_instanceid,
798 daoack->rpl_status));
799
800 /* no officially defined options for DAOACK, but print any we find */
801 if(ndo->ndo_vflag > 1) {
802 const struct rpl_dio_genoption *opt = (const struct rpl_dio_genoption *)bp;
803 rpl_dio_printopt(ndo, opt, length);
804 }
805 return;
806
807 trunc:
808 ND_PRINT((ndo, "%s", rpl_tstr));
809 return;
810
811 tooshort:
812 ND_PRINT((ndo," [|dao-length too short]"));
813 return;
814 }
815
816 static void
817 rpl_print(netdissect_options *ndo,
818 const struct icmp6_hdr *hdr,
819 const u_char *bp, u_int length)
820 {
821 int secured = hdr->icmp6_code & 0x80;
822 int basecode= hdr->icmp6_code & 0x7f;
823
824 if(secured) {
825 ND_PRINT((ndo, ", (SEC) [worktodo]"));
826 /* XXX
827 * the next header pointer needs to move forward to
828 * skip the secure part.
829 */
830 return;
831 } else {
832 ND_PRINT((ndo, ", (CLR)"));
833 }
834
835 switch(basecode) {
836 case ND_RPL_DAG_IS:
837 ND_PRINT((ndo, "DODAG Information Solicitation"));
838 if(ndo->ndo_vflag) {
839 }
840 break;
841 case ND_RPL_DAG_IO:
842 ND_PRINT((ndo, "DODAG Information Object"));
843 if(ndo->ndo_vflag) {
844 rpl_dio_print(ndo, bp, length);
845 }
846 break;
847 case ND_RPL_DAO:
848 ND_PRINT((ndo, "Destination Advertisement Object"));
849 if(ndo->ndo_vflag) {
850 rpl_dao_print(ndo, bp, length);
851 }
852 break;
853 case ND_RPL_DAO_ACK:
854 ND_PRINT((ndo, "Destination Advertisement Object Ack"));
855 if(ndo->ndo_vflag) {
856 rpl_daoack_print(ndo, bp, length);
857 }
858 break;
859 default:
860 ND_PRINT((ndo, "RPL message, unknown code %u",hdr->icmp6_code));
861 break;
862 }
863 return;
864
865 #if 0
866 trunc:
867 ND_PRINT((ndo, "%s", rpl_tstr));
868 return;
869 #endif
870
871 }
872
873
874 void
875 icmp6_print(netdissect_options *ndo,
876 const u_char *bp, u_int length, const u_char *bp2, int fragmented)
877 {
878 const struct icmp6_hdr *dp;
879 const struct ip6_hdr *ip;
880 const struct ip6_hdr *oip;
881 const struct udphdr *ouh;
882 int dport;
883 const u_char *ep;
884 u_int prot;
885
886 dp = (const struct icmp6_hdr *)bp;
887 ip = (const struct ip6_hdr *)bp2;
888 oip = (const struct ip6_hdr *)(dp + 1);
889 /* 'ep' points to the end of available data. */
890 ep = ndo->ndo_snapend;
891
892 ND_TCHECK(dp->icmp6_cksum);
893
894 if (ndo->ndo_vflag && !fragmented) {
895 uint16_t sum, udp_sum;
896
897 if (ND_TTEST2(bp[0], length)) {
898 udp_sum = EXTRACT_16BITS(&dp->icmp6_cksum);
899 sum = icmp6_cksum(ndo, ip, dp, length);
900 if (sum != 0)
901 ND_PRINT((ndo,"[bad icmp6 cksum 0x%04x -> 0x%04x!] ",
902 udp_sum,
903 in_cksum_shouldbe(udp_sum, sum)));
904 else
905 ND_PRINT((ndo,"[icmp6 sum ok] "));
906 }
907 }
908
909 ND_PRINT((ndo,"ICMP6, %s", tok2str(icmp6_type_values,"unknown icmp6 type (%u)",dp->icmp6_type)));
910
911 /* display cosmetics: print the packet length for printer that use the vflag now */
912 if (ndo->ndo_vflag && (dp->icmp6_type == ND_ROUTER_SOLICIT ||
913 dp->icmp6_type == ND_ROUTER_ADVERT ||
914 dp->icmp6_type == ND_NEIGHBOR_ADVERT ||
915 dp->icmp6_type == ND_NEIGHBOR_SOLICIT ||
916 dp->icmp6_type == ND_REDIRECT ||
917 dp->icmp6_type == ICMP6_HADISCOV_REPLY ||
918 dp->icmp6_type == ICMP6_MOBILEPREFIX_ADVERT ))
919 ND_PRINT((ndo,", length %u", length));
920
921 switch (dp->icmp6_type) {
922 case ICMP6_DST_UNREACH:
923 ND_TCHECK(oip->ip6_dst);
924 ND_PRINT((ndo,", %s", tok2str(icmp6_dst_unreach_code_values,"unknown unreach code (%u)",dp->icmp6_code)));
925 switch (dp->icmp6_code) {
926
927 case ICMP6_DST_UNREACH_NOROUTE: /* fall through */
928 case ICMP6_DST_UNREACH_ADMIN:
929 case ICMP6_DST_UNREACH_ADDR:
930 ND_PRINT((ndo," %s",ip6addr_string(ndo, &oip->ip6_dst)));
931 break;
932 case ICMP6_DST_UNREACH_BEYONDSCOPE:
933 ND_PRINT((ndo," %s, source address %s",
934 ip6addr_string(ndo, &oip->ip6_dst),
935 ip6addr_string(ndo, &oip->ip6_src)));
936 break;
937 case ICMP6_DST_UNREACH_NOPORT:
938 if ((ouh = get_upperlayer(ndo, (const u_char *)oip, &prot))
939 == NULL)
940 goto trunc;
941
942 dport = EXTRACT_16BITS(&ouh->uh_dport);
943 switch (prot) {
944 case IPPROTO_TCP:
945 ND_PRINT((ndo,", %s tcp port %s",
946 ip6addr_string(ndo, &oip->ip6_dst),
947 tcpport_string(ndo, dport)));
948 break;
949 case IPPROTO_UDP:
950 ND_PRINT((ndo,", %s udp port %s",
951 ip6addr_string(ndo, &oip->ip6_dst),
952 udpport_string(ndo, dport)));
953 break;
954 default:
955 ND_PRINT((ndo,", %s protocol %d port %d unreachable",
956 ip6addr_string(ndo, &oip->ip6_dst),
957 oip->ip6_nxt, dport));
958 break;
959 }
960 break;
961 default:
962 if (ndo->ndo_vflag <= 1) {
963 print_unknown_data(ndo, bp,"\n\t",length);
964 return;
965 }
966 break;
967 }
968 break;
969 case ICMP6_PACKET_TOO_BIG:
970 ND_TCHECK(dp->icmp6_mtu);
971 ND_PRINT((ndo,", mtu %u", EXTRACT_32BITS(&dp->icmp6_mtu)));
972 break;
973 case ICMP6_TIME_EXCEEDED:
974 ND_TCHECK(oip->ip6_dst);
975 switch (dp->icmp6_code) {
976 case ICMP6_TIME_EXCEED_TRANSIT:
977 ND_PRINT((ndo," for %s",
978 ip6addr_string(ndo, &oip->ip6_dst)));
979 break;
980 case ICMP6_TIME_EXCEED_REASSEMBLY:
981 ND_PRINT((ndo," (reassembly)"));
982 break;
983 default:
984 ND_PRINT((ndo,", unknown code (%u)", dp->icmp6_code));
985 break;
986 }
987 break;
988 case ICMP6_PARAM_PROB:
989 ND_TCHECK(oip->ip6_dst);
990 switch (dp->icmp6_code) {
991 case ICMP6_PARAMPROB_HEADER:
992 ND_PRINT((ndo,", erroneous - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)));
993 break;
994 case ICMP6_PARAMPROB_NEXTHEADER:
995 ND_PRINT((ndo,", next header - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)));
996 break;
997 case ICMP6_PARAMPROB_OPTION:
998 ND_PRINT((ndo,", option - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)));
999 break;
1000 default:
1001 ND_PRINT((ndo,", code-#%d",
1002 dp->icmp6_code));
1003 break;
1004 }
1005 break;
1006 case ICMP6_ECHO_REQUEST:
1007 case ICMP6_ECHO_REPLY:
1008 ND_TCHECK(dp->icmp6_seq);
1009 ND_PRINT((ndo,", seq %u", EXTRACT_16BITS(&dp->icmp6_seq)));
1010 break;
1011 case ICMP6_MEMBERSHIP_QUERY:
1012 if (length == MLD_MINLEN) {
1013 mld6_print(ndo, (const u_char *)dp);
1014 } else if (length >= MLDV2_MINLEN) {
1015 ND_PRINT((ndo," v2"));
1016 mldv2_query_print(ndo, (const u_char *)dp, length);
1017 } else {
1018 ND_PRINT((ndo," unknown-version (len %u) ", length));
1019 }
1020 break;
1021 case ICMP6_MEMBERSHIP_REPORT:
1022 mld6_print(ndo, (const u_char *)dp);
1023 break;
1024 case ICMP6_MEMBERSHIP_REDUCTION:
1025 mld6_print(ndo, (const u_char *)dp);
1026 break;
1027 case ND_ROUTER_SOLICIT:
1028 #define RTSOLLEN 8
1029 if (ndo->ndo_vflag) {
1030 icmp6_opt_print(ndo, (const u_char *)dp + RTSOLLEN,
1031 length - RTSOLLEN);
1032 }
1033 break;
1034 case ND_ROUTER_ADVERT:
1035 #define RTADVLEN 16
1036 if (ndo->ndo_vflag) {
1037 const struct nd_router_advert *p;
1038
1039 p = (const struct nd_router_advert *)dp;
1040 ND_TCHECK(p->nd_ra_retransmit);
1041 ND_PRINT((ndo,"\n\thop limit %u, Flags [%s]" \
1042 ", pref %s, router lifetime %us, reachable time %ums, retrans timer %ums",
1043 (u_int)p->nd_ra_curhoplimit,
1044 bittok2str(icmp6_opt_ra_flag_values,"none",(p->nd_ra_flags_reserved)),
1045 get_rtpref(p->nd_ra_flags_reserved),
1046 EXTRACT_16BITS(&p->nd_ra_router_lifetime),
1047 EXTRACT_32BITS(&p->nd_ra_reachable),
1048 EXTRACT_32BITS(&p->nd_ra_retransmit)));
1049
1050 icmp6_opt_print(ndo, (const u_char *)dp + RTADVLEN,
1051 length - RTADVLEN);
1052 }
1053 break;
1054 case ND_NEIGHBOR_SOLICIT:
1055 {
1056 const struct nd_neighbor_solicit *p;
1057 p = (const struct nd_neighbor_solicit *)dp;
1058 ND_TCHECK(p->nd_ns_target);
1059 ND_PRINT((ndo,", who has %s", ip6addr_string(ndo, &p->nd_ns_target)));
1060 if (ndo->ndo_vflag) {
1061 #define NDSOLLEN 24
1062 icmp6_opt_print(ndo, (const u_char *)dp + NDSOLLEN,
1063 length - NDSOLLEN);
1064 }
1065 }
1066 break;
1067 case ND_NEIGHBOR_ADVERT:
1068 {
1069 const struct nd_neighbor_advert *p;
1070
1071 p = (const struct nd_neighbor_advert *)dp;
1072 ND_TCHECK(p->nd_na_target);
1073 ND_PRINT((ndo,", tgt is %s",
1074 ip6addr_string(ndo, &p->nd_na_target)));
1075 if (ndo->ndo_vflag) {
1076 ND_PRINT((ndo,", Flags [%s]",
1077 bittok2str(icmp6_nd_na_flag_values,
1078 "none",
1079 EXTRACT_32BITS(&p->nd_na_flags_reserved))));
1080 #define NDADVLEN 24
1081 icmp6_opt_print(ndo, (const u_char *)dp + NDADVLEN,
1082 length - NDADVLEN);
1083 #undef NDADVLEN
1084 }
1085 }
1086 break;
1087 case ND_REDIRECT:
1088 #define RDR(i) ((const struct nd_redirect *)(i))
1089 ND_TCHECK(RDR(dp)->nd_rd_dst);
1090 ND_PRINT((ndo,", %s", ip6addr_string(ndo, &RDR(dp)->nd_rd_dst)));
1091 ND_TCHECK(RDR(dp)->nd_rd_target);
1092 ND_PRINT((ndo," to %s",
1093 ip6addr_string(ndo, &RDR(dp)->nd_rd_target)));
1094 #define REDIRECTLEN 40
1095 if (ndo->ndo_vflag) {
1096 icmp6_opt_print(ndo, (const u_char *)dp + REDIRECTLEN,
1097 length - REDIRECTLEN);
1098 }
1099 break;
1100 #undef REDIRECTLEN
1101 #undef RDR
1102 case ICMP6_ROUTER_RENUMBERING:
1103 icmp6_rrenum_print(ndo, bp, ep);
1104 break;
1105 case ICMP6_NI_QUERY:
1106 case ICMP6_NI_REPLY:
1107 icmp6_nodeinfo_print(ndo, length, bp, ep);
1108 break;
1109 case IND_SOLICIT:
1110 case IND_ADVERT:
1111 break;
1112 case ICMP6_V2_MEMBERSHIP_REPORT:
1113 mldv2_report_print(ndo, (const u_char *) dp, length);
1114 break;
1115 case ICMP6_MOBILEPREFIX_SOLICIT: /* fall through */
1116 case ICMP6_HADISCOV_REQUEST:
1117 ND_TCHECK(dp->icmp6_data16[0]);
1118 ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])));
1119 break;
1120 case ICMP6_HADISCOV_REPLY:
1121 if (ndo->ndo_vflag) {
1122 const struct in6_addr *in6;
1123 const u_char *cp;
1124
1125 ND_TCHECK(dp->icmp6_data16[0]);
1126 ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])));
1127 cp = (const u_char *)dp + length;
1128 in6 = (const struct in6_addr *)(dp + 1);
1129 for (; (const u_char *)in6 < cp; in6++) {
1130 ND_TCHECK(*in6);
1131 ND_PRINT((ndo,", %s", ip6addr_string(ndo, in6)));
1132 }
1133 }
1134 break;
1135 case ICMP6_MOBILEPREFIX_ADVERT:
1136 if (ndo->ndo_vflag) {
1137 ND_TCHECK(dp->icmp6_data16[0]);
1138 ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])));
1139 ND_TCHECK(dp->icmp6_data16[1]);
1140 if (dp->icmp6_data16[1] & 0xc0)
1141 ND_PRINT((ndo," "));
1142 if (dp->icmp6_data16[1] & 0x80)
1143 ND_PRINT((ndo,"M"));
1144 if (dp->icmp6_data16[1] & 0x40)
1145 ND_PRINT((ndo,"O"));
1146 #define MPADVLEN 8
1147 icmp6_opt_print(ndo, (const u_char *)dp + MPADVLEN,
1148 length - MPADVLEN);
1149 }
1150 break;
1151 case ND_RPL_MESSAGE:
1152 /* plus 4, because struct icmp6_hdr contains 4 bytes of icmp payload */
1153 rpl_print(ndo, dp, &dp->icmp6_data8[0], length-sizeof(struct icmp6_hdr)+4);
1154 break;
1155 default:
1156 ND_PRINT((ndo,", length %u", length));
1157 if (ndo->ndo_vflag <= 1)
1158 print_unknown_data(ndo, bp,"\n\t", length);
1159 return;
1160 }
1161 if (!ndo->ndo_vflag)
1162 ND_PRINT((ndo,", length %u", length));
1163 return;
1164 trunc:
1165 ND_PRINT((ndo, "%s", icmp6_tstr));
1166 }
1167
1168 static const struct udphdr *
1169 get_upperlayer(netdissect_options *ndo, const u_char *bp, u_int *prot)
1170 {
1171 const u_char *ep;
1172 const struct ip6_hdr *ip6 = (const struct ip6_hdr *)bp;
1173 const struct udphdr *uh;
1174 const struct ip6_hbh *hbh;
1175 const struct ip6_frag *fragh;
1176 const struct ah *ah;
1177 u_int nh;
1178 int hlen;
1179
1180 /* 'ep' points to the end of available data. */
1181 ep = ndo->ndo_snapend;
1182
1183 if (!ND_TTEST(ip6->ip6_nxt))
1184 return NULL;
1185
1186 nh = ip6->ip6_nxt;
1187 hlen = sizeof(struct ip6_hdr);
1188
1189 while (bp < ep) {
1190 bp += hlen;
1191
1192 switch(nh) {
1193 case IPPROTO_UDP:
1194 case IPPROTO_TCP:
1195 uh = (const struct udphdr *)bp;
1196 if (ND_TTEST(uh->uh_dport)) {
1197 *prot = nh;
1198 return(uh);
1199 }
1200 else
1201 return(NULL);
1202 /* NOTREACHED */
1203
1204 case IPPROTO_HOPOPTS:
1205 case IPPROTO_DSTOPTS:
1206 case IPPROTO_ROUTING:
1207 hbh = (const struct ip6_hbh *)bp;
1208 if (!ND_TTEST(hbh->ip6h_len))
1209 return(NULL);
1210 nh = hbh->ip6h_nxt;
1211 hlen = (hbh->ip6h_len + 1) << 3;
1212 break;
1213
1214 case IPPROTO_FRAGMENT: /* this should be odd, but try anyway */
1215 fragh = (const struct ip6_frag *)bp;
1216 if (!ND_TTEST(fragh->ip6f_offlg))
1217 return(NULL);
1218 /* fragments with non-zero offset are meaningless */
1219 if ((EXTRACT_16BITS(&fragh->ip6f_offlg) & IP6F_OFF_MASK) != 0)
1220 return(NULL);
1221 nh = fragh->ip6f_nxt;
1222 hlen = sizeof(struct ip6_frag);
1223 break;
1224
1225 case IPPROTO_AH:
1226 ah = (const struct ah *)bp;
1227 if (!ND_TTEST(ah->ah_len))
1228 return(NULL);
1229 nh = ah->ah_nxt;
1230 hlen = (ah->ah_len + 2) << 2;
1231 break;
1232
1233 default: /* unknown or undecodable header */
1234 *prot = nh; /* meaningless, but set here anyway */
1235 return(NULL);
1236 }
1237 }
1238
1239 return(NULL); /* should be notreached, though */
1240 }
1241
1242 static void
1243 icmp6_opt_print(netdissect_options *ndo, const u_char *bp, int resid)
1244 {
1245 const struct nd_opt_hdr *op;
1246 const struct nd_opt_prefix_info *opp;
1247 const struct nd_opt_mtu *opm;
1248 const struct nd_opt_rdnss *oprd;
1249 const struct nd_opt_dnssl *opds;
1250 const struct nd_opt_advinterval *opa;
1251 const struct nd_opt_homeagent_info *oph;
1252 const struct nd_opt_route_info *opri;
1253 const u_char *cp, *ep, *domp;
1254 struct in6_addr in6;
1255 const struct in6_addr *in6p;
1256 size_t l;
1257 u_int i;
1258
1259 #define ECHECK(var) if ((const u_char *)&(var) > ep - sizeof(var)) return
1260
1261 cp = bp;
1262 /* 'ep' points to the end of available data. */
1263 ep = ndo->ndo_snapend;
1264
1265 while (cp < ep) {
1266 op = (const struct nd_opt_hdr *)cp;
1267
1268 ECHECK(op->nd_opt_len);
1269 if (resid <= 0)
1270 return;
1271 if (op->nd_opt_len == 0)
1272 goto trunc;
1273 if (cp + (op->nd_opt_len << 3) > ep)
1274 goto trunc;
1275
1276 ND_PRINT((ndo,"\n\t %s option (%u), length %u (%u): ",
1277 tok2str(icmp6_opt_values, "unknown", op->nd_opt_type),
1278 op->nd_opt_type,
1279 op->nd_opt_len << 3,
1280 op->nd_opt_len));
1281
1282 switch (op->nd_opt_type) {
1283 case ND_OPT_SOURCE_LINKADDR:
1284 l = (op->nd_opt_len << 3) - 2;
1285 print_lladdr(ndo, cp + 2, l);
1286 break;
1287 case ND_OPT_TARGET_LINKADDR:
1288 l = (op->nd_opt_len << 3) - 2;
1289 print_lladdr(ndo, cp + 2, l);
1290 break;
1291 case ND_OPT_PREFIX_INFORMATION:
1292 opp = (const struct nd_opt_prefix_info *)op;
1293 ND_TCHECK(opp->nd_opt_pi_prefix);
1294 ND_PRINT((ndo,"%s/%u%s, Flags [%s], valid time %s",
1295 ip6addr_string(ndo, &opp->nd_opt_pi_prefix),
1296 opp->nd_opt_pi_prefix_len,
1297 (op->nd_opt_len != 4) ? "badlen" : "",
1298 bittok2str(icmp6_opt_pi_flag_values, "none", opp->nd_opt_pi_flags_reserved),
1299 get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_valid_time))));
1300 ND_PRINT((ndo,", pref. time %s", get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_preferred_time))));
1301 break;
1302 case ND_OPT_REDIRECTED_HEADER:
1303 print_unknown_data(ndo, bp,"\n\t ",op->nd_opt_len<<3);
1304 /* xxx */
1305 break;
1306 case ND_OPT_MTU:
1307 opm = (const struct nd_opt_mtu *)op;
1308 ND_TCHECK(opm->nd_opt_mtu_mtu);
1309 ND_PRINT((ndo," %u%s",
1310 EXTRACT_32BITS(&opm->nd_opt_mtu_mtu),
1311 (op->nd_opt_len != 1) ? "bad option length" : "" ));
1312 break;
1313 case ND_OPT_RDNSS:
1314 oprd = (const struct nd_opt_rdnss *)op;
1315 l = (op->nd_opt_len - 1) / 2;
1316 ND_PRINT((ndo," lifetime %us,",
1317 EXTRACT_32BITS(&oprd->nd_opt_rdnss_lifetime)));
1318 for (i = 0; i < l; i++) {
1319 ND_TCHECK(oprd->nd_opt_rdnss_addr[i]);
1320 ND_PRINT((ndo," addr: %s",
1321 ip6addr_string(ndo, &oprd->nd_opt_rdnss_addr[i])));
1322 }
1323 break;
1324 case ND_OPT_DNSSL:
1325 opds = (const struct nd_opt_dnssl *)op;
1326 ND_PRINT((ndo," lifetime %us, domain(s):",
1327 EXTRACT_32BITS(&opds->nd_opt_dnssl_lifetime)));
1328 domp = cp + 8; /* domain names, variable-sized, RFC1035-encoded */
1329 while (domp < cp + (op->nd_opt_len << 3) && *domp != '\0')
1330 {
1331 ND_PRINT((ndo, " "));
1332 if ((domp = ns_nprint (ndo, domp, bp)) == NULL)
1333 goto trunc;
1334 }
1335 break;
1336 case ND_OPT_ADVINTERVAL:
1337 opa = (const struct nd_opt_advinterval *)op;
1338 ND_TCHECK(opa->nd_opt_adv_interval);
1339 ND_PRINT((ndo," %ums", EXTRACT_32BITS(&opa->nd_opt_adv_interval)));
1340 break;
1341 case ND_OPT_HOMEAGENT_INFO:
1342 oph = (const struct nd_opt_homeagent_info *)op;
1343 ND_TCHECK(oph->nd_opt_hai_lifetime);
1344 ND_PRINT((ndo," preference %u, lifetime %u",
1345 EXTRACT_16BITS(&oph->nd_opt_hai_preference),
1346 EXTRACT_16BITS(&oph->nd_opt_hai_lifetime)));
1347 break;
1348 case ND_OPT_ROUTE_INFO:
1349 opri = (const struct nd_opt_route_info *)op;
1350 ND_TCHECK(opri->nd_opt_rti_lifetime);
1351 memset(&in6, 0, sizeof(in6));
1352 in6p = (const struct in6_addr *)(opri + 1);
1353 switch (op->nd_opt_len) {
1354 case 1:
1355 break;
1356 case 2:
1357 ND_TCHECK2(*in6p, 8);
1358 memcpy(&in6, opri + 1, 8);
1359 break;
1360 case 3:
1361 ND_TCHECK(*in6p);
1362 memcpy(&in6, opri + 1, sizeof(in6));
1363 break;
1364 default:
1365 goto trunc;
1366 }
1367 ND_PRINT((ndo," %s/%u", ip6addr_string(ndo, &in6),
1368 opri->nd_opt_rti_prefixlen));
1369 ND_PRINT((ndo,", pref=%s", get_rtpref(opri->nd_opt_rti_flags)));
1370 ND_PRINT((ndo,", lifetime=%s",
1371 get_lifetime(EXTRACT_32BITS(&opri->nd_opt_rti_lifetime))));
1372 break;
1373 default:
1374 if (ndo->ndo_vflag <= 1) {
1375 print_unknown_data(ndo,cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */
1376 return;
1377 }
1378 break;
1379 }
1380 /* do we want to see an additional hexdump ? */
1381 if (ndo->ndo_vflag> 1)
1382 print_unknown_data(ndo, cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */
1383
1384 cp += op->nd_opt_len << 3;
1385 resid -= op->nd_opt_len << 3;
1386 }
1387 return;
1388
1389 trunc:
1390 ND_PRINT((ndo, "%s", icmp6_tstr));
1391 return;
1392 #undef ECHECK
1393 }
1394
1395 static void
1396 mld6_print(netdissect_options *ndo, const u_char *bp)
1397 {
1398 const struct mld6_hdr *mp = (const struct mld6_hdr *)bp;
1399 const u_char *ep;
1400
1401 /* 'ep' points to the end of available data. */
1402 ep = ndo->ndo_snapend;
1403
1404 if ((const u_char *)mp + sizeof(*mp) > ep)
1405 return;
1406
1407 ND_PRINT((ndo,"max resp delay: %d ", EXTRACT_16BITS(&mp->mld6_maxdelay)));
1408 ND_PRINT((ndo,"addr: %s", ip6addr_string(ndo, &mp->mld6_addr)));
1409 }
1410
1411 static void
1412 mldv2_report_print(netdissect_options *ndo, const u_char *bp, u_int len)
1413 {
1414 const struct icmp6_hdr *icp = (const struct icmp6_hdr *) bp;
1415 u_int group, nsrcs, ngroups;
1416 u_int i, j;
1417
1418 /* Minimum len is 8 */
1419 if (len < 8) {
1420 ND_PRINT((ndo," [invalid len %d]", len));
1421 return;
1422 }
1423
1424 ND_TCHECK(icp->icmp6_data16[1]);
1425 ngroups = EXTRACT_16BITS(&icp->icmp6_data16[1]);
1426 ND_PRINT((ndo,", %d group record(s)", ngroups));
1427 if (ndo->ndo_vflag > 0) {
1428 /* Print the group records */
1429 group = 8;
1430 for (i = 0; i < ngroups; i++) {
1431 /* type(1) + auxlen(1) + numsrc(2) + grp(16) */
1432 if (len < group + 20) {
1433 ND_PRINT((ndo," [invalid number of groups]"));
1434 return;
1435 }
1436 ND_TCHECK2(bp[group + 4], sizeof(struct in6_addr));
1437 ND_PRINT((ndo," [gaddr %s", ip6addr_string(ndo, &bp[group + 4])));
1438 ND_PRINT((ndo," %s", tok2str(mldv2report2str, " [v2-report-#%d]",
1439 bp[group])));
1440 nsrcs = (bp[group + 2] << 8) + bp[group + 3];
1441 /* Check the number of sources and print them */
1442 if (len < group + 20 + (nsrcs * sizeof(struct in6_addr))) {
1443 ND_PRINT((ndo," [invalid number of sources %d]", nsrcs));
1444 return;
1445 }
1446 if (ndo->ndo_vflag == 1)
1447 ND_PRINT((ndo,", %d source(s)", nsrcs));
1448 else {
1449 /* Print the sources */
1450 ND_PRINT((ndo," {"));
1451 for (j = 0; j < nsrcs; j++) {
1452 ND_TCHECK2(bp[group + 20 + j * sizeof(struct in6_addr)],
1453 sizeof(struct in6_addr));
1454 ND_PRINT((ndo," %s", ip6addr_string(ndo, &bp[group + 20 + j * sizeof(struct in6_addr)])));
1455 }
1456 ND_PRINT((ndo," }"));
1457 }
1458 /* Next group record */
1459 group += 20 + nsrcs * sizeof(struct in6_addr);
1460 ND_PRINT((ndo,"]"));
1461 }
1462 }
1463 return;
1464 trunc:
1465 ND_PRINT((ndo, "%s", mldv2_tstr));
1466 return;
1467 }
1468
1469 static void
1470 mldv2_query_print(netdissect_options *ndo, const u_char *bp, u_int len)
1471 {
1472 const struct icmp6_hdr *icp = (const struct icmp6_hdr *) bp;
1473 u_int mrc;
1474 int mrt, qqi;
1475 u_int nsrcs;
1476 register u_int i;
1477
1478 /* Minimum len is 28 */
1479 if (len < 28) {
1480 ND_PRINT((ndo," [invalid len %d]", len));
1481 return;
1482 }
1483 ND_TCHECK(icp->icmp6_data16[0]);
1484 mrc = EXTRACT_16BITS(&icp->icmp6_data16[0]);
1485 if (mrc < 32768) {
1486 mrt = mrc;
1487 } else {
1488 mrt = ((mrc & 0x0fff) | 0x1000) << (((mrc & 0x7000) >> 12) + 3);
1489 }
1490 if (ndo->ndo_vflag) {
1491 ND_PRINT((ndo," [max resp delay=%d]", mrt));
1492 }
1493 ND_TCHECK2(bp[8], sizeof(struct in6_addr));
1494 ND_PRINT((ndo," [gaddr %s", ip6addr_string(ndo, &bp[8])));
1495
1496 if (ndo->ndo_vflag) {
1497 ND_TCHECK(bp[25]);
1498 if (bp[24] & 0x08) {
1499 ND_PRINT((ndo," sflag"));
1500 }
1501 if (bp[24] & 0x07) {
1502 ND_PRINT((ndo," robustness=%d", bp[24] & 0x07));
1503 }
1504 if (bp[25] < 128) {
1505 qqi = bp[25];
1506 } else {
1507 qqi = ((bp[25] & 0x0f) | 0x10) << (((bp[25] & 0x70) >> 4) + 3);
1508 }
1509 ND_PRINT((ndo," qqi=%d", qqi));
1510 }
1511
1512 ND_TCHECK2(bp[26], 2);
1513 nsrcs = EXTRACT_16BITS(&bp[26]);
1514 if (nsrcs > 0) {
1515 if (len < 28 + nsrcs * sizeof(struct in6_addr))
1516 ND_PRINT((ndo," [invalid number of sources]"));
1517 else if (ndo->ndo_vflag > 1) {
1518 ND_PRINT((ndo," {"));
1519 for (i = 0; i < nsrcs; i++) {
1520 ND_TCHECK2(bp[28 + i * sizeof(struct in6_addr)],
1521 sizeof(struct in6_addr));
1522 ND_PRINT((ndo," %s", ip6addr_string(ndo, &bp[28 + i * sizeof(struct in6_addr)])));
1523 }
1524 ND_PRINT((ndo," }"));
1525 } else
1526 ND_PRINT((ndo,", %d source(s)", nsrcs));
1527 }
1528 ND_PRINT((ndo,"]"));
1529 return;
1530 trunc:
1531 ND_PRINT((ndo, "%s", mldv2_tstr));
1532 return;
1533 }
1534
1535 static void
1536 dnsname_print(netdissect_options *ndo, const u_char *cp, const u_char *ep)
1537 {
1538 int i;
1539
1540 /* DNS name decoding - no decompression */
1541 ND_PRINT((ndo,", \""));
1542 while (cp < ep) {
1543 i = *cp++;
1544 if (i) {
1545 if (i > ep - cp) {
1546 ND_PRINT((ndo,"???"));
1547 break;
1548 }
1549 while (i-- && cp < ep) {
1550 safeputchar(ndo, *cp);
1551 cp++;
1552 }
1553 if (cp + 1 < ep && *cp)
1554 ND_PRINT((ndo,"."));
1555 } else {
1556 if (cp == ep) {
1557 /* FQDN */
1558 ND_PRINT((ndo,"."));
1559 } else if (cp + 1 == ep && *cp == '\0') {
1560 /* truncated */
1561 } else {
1562 /* invalid */
1563 ND_PRINT((ndo,"???"));
1564 }
1565 break;
1566 }
1567 }
1568 ND_PRINT((ndo,"\""));
1569 }
1570
1571 static void
1572 icmp6_nodeinfo_print(netdissect_options *ndo, u_int icmp6len, const u_char *bp, const u_char *ep)
1573 {
1574 const struct icmp6_nodeinfo *ni6;
1575 const struct icmp6_hdr *dp;
1576 const u_char *cp;
1577 size_t siz, i;
1578 int needcomma;
1579
1580 if (ep < bp)
1581 return;
1582 dp = (const struct icmp6_hdr *)bp;
1583 ni6 = (const struct icmp6_nodeinfo *)bp;
1584 siz = ep - bp;
1585
1586 switch (ni6->ni_type) {
1587 case ICMP6_NI_QUERY:
1588 if (siz == sizeof(*dp) + 4) {
1589 /* KAME who-are-you */
1590 ND_PRINT((ndo," who-are-you request"));
1591 break;
1592 }
1593 ND_PRINT((ndo," node information query"));
1594
1595 ND_TCHECK2(*dp, sizeof(*ni6));
1596 ni6 = (const struct icmp6_nodeinfo *)dp;
1597 ND_PRINT((ndo," (")); /*)*/
1598 switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
1599 case NI_QTYPE_NOOP:
1600 ND_PRINT((ndo,"noop"));
1601 break;
1602 case NI_QTYPE_SUPTYPES:
1603 ND_PRINT((ndo,"supported qtypes"));
1604 i = EXTRACT_16BITS(&ni6->ni_flags);
1605 if (i)
1606 ND_PRINT((ndo," [%s]", (i & 0x01) ? "C" : ""));
1607 break;
1608 case NI_QTYPE_FQDN:
1609 ND_PRINT((ndo,"DNS name"));
1610 break;
1611 case NI_QTYPE_NODEADDR:
1612 ND_PRINT((ndo,"node addresses"));
1613 i = ni6->ni_flags;
1614 if (!i)
1615 break;
1616 /* NI_NODEADDR_FLAG_TRUNCATE undefined for query */
1617 ND_PRINT((ndo," [%s%s%s%s%s%s]",
1618 (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
1619 (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
1620 (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
1621 (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
1622 (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
1623 (i & NI_NODEADDR_FLAG_ALL) ? "A" : ""));
1624 break;
1625 default:
1626 ND_PRINT((ndo,"unknown"));
1627 break;
1628 }
1629
1630 if (ni6->ni_qtype == NI_QTYPE_NOOP ||
1631 ni6->ni_qtype == NI_QTYPE_SUPTYPES) {
1632 if (siz != sizeof(*ni6))
1633 if (ndo->ndo_vflag)
1634 ND_PRINT((ndo,", invalid len"));
1635 /*(*/
1636 ND_PRINT((ndo,")"));
1637 break;
1638 }
1639
1640
1641 /* XXX backward compat, icmp-name-lookup-03 */
1642 if (siz == sizeof(*ni6)) {
1643 ND_PRINT((ndo,", 03 draft"));
1644 /*(*/
1645 ND_PRINT((ndo,")"));
1646 break;
1647 }
1648
1649 switch (ni6->ni_code) {
1650 case ICMP6_NI_SUBJ_IPV6:
1651 if (!ND_TTEST2(*dp,
1652 sizeof(*ni6) + sizeof(struct in6_addr)))
1653 break;
1654 if (siz != sizeof(*ni6) + sizeof(struct in6_addr)) {
1655 if (ndo->ndo_vflag)
1656 ND_PRINT((ndo,", invalid subject len"));
1657 break;
1658 }
1659 ND_PRINT((ndo,", subject=%s",
1660 ip6addr_string(ndo, ni6 + 1)));
1661 break;
1662 case ICMP6_NI_SUBJ_FQDN:
1663 ND_PRINT((ndo,", subject=DNS name"));
1664 cp = (const u_char *)(ni6 + 1);
1665 if (cp[0] == ep - cp - 1) {
1666 /* icmp-name-lookup-03, pascal string */
1667 if (ndo->ndo_vflag)
1668 ND_PRINT((ndo,", 03 draft"));
1669 cp++;
1670 ND_PRINT((ndo,", \""));
1671 while (cp < ep) {
1672 safeputchar(ndo, *cp);
1673 cp++;
1674 }
1675 ND_PRINT((ndo,"\""));
1676 } else
1677 dnsname_print(ndo, cp, ep);
1678 break;
1679 case ICMP6_NI_SUBJ_IPV4:
1680 if (!ND_TTEST2(*dp, sizeof(*ni6) + sizeof(struct in_addr)))
1681 break;
1682 if (siz != sizeof(*ni6) + sizeof(struct in_addr)) {
1683 if (ndo->ndo_vflag)
1684 ND_PRINT((ndo,", invalid subject len"));
1685 break;
1686 }
1687 ND_PRINT((ndo,", subject=%s",
1688 ipaddr_string(ndo, ni6 + 1)));
1689 break;
1690 default:
1691 ND_PRINT((ndo,", unknown subject"));
1692 break;
1693 }
1694
1695 /*(*/
1696 ND_PRINT((ndo,")"));
1697 break;
1698
1699 case ICMP6_NI_REPLY:
1700 if (icmp6len > siz) {
1701 ND_PRINT((ndo,"[|icmp6: node information reply]"));
1702 break;
1703 }
1704
1705 needcomma = 0;
1706
1707 ND_TCHECK2(*dp, sizeof(*ni6));
1708 ni6 = (const struct icmp6_nodeinfo *)dp;
1709 ND_PRINT((ndo," node information reply"));
1710 ND_PRINT((ndo," (")); /*)*/
1711 switch (ni6->ni_code) {
1712 case ICMP6_NI_SUCCESS:
1713 if (ndo->ndo_vflag) {
1714 ND_PRINT((ndo,"success"));
1715 needcomma++;
1716 }
1717 break;
1718 case ICMP6_NI_REFUSED:
1719 ND_PRINT((ndo,"refused"));
1720 needcomma++;
1721 if (siz != sizeof(*ni6))
1722 if (ndo->ndo_vflag)
1723 ND_PRINT((ndo,", invalid length"));
1724 break;
1725 case ICMP6_NI_UNKNOWN:
1726 ND_PRINT((ndo,"unknown"));
1727 needcomma++;
1728 if (siz != sizeof(*ni6))
1729 if (ndo->ndo_vflag)
1730 ND_PRINT((ndo,", invalid length"));
1731 break;
1732 }
1733
1734 if (ni6->ni_code != ICMP6_NI_SUCCESS) {
1735 /*(*/
1736 ND_PRINT((ndo,")"));
1737 break;
1738 }
1739
1740 switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
1741 case NI_QTYPE_NOOP:
1742 if (needcomma)
1743 ND_PRINT((ndo,", "));
1744 ND_PRINT((ndo,"noop"));
1745 if (siz != sizeof(*ni6))
1746 if (ndo->ndo_vflag)
1747 ND_PRINT((ndo,", invalid length"));
1748 break;
1749 case NI_QTYPE_SUPTYPES:
1750 if (needcomma)
1751 ND_PRINT((ndo,", "));
1752 ND_PRINT((ndo,"supported qtypes"));
1753 i = EXTRACT_16BITS(&ni6->ni_flags);
1754 if (i)
1755 ND_PRINT((ndo," [%s]", (i & 0x01) ? "C" : ""));
1756 break;
1757 case NI_QTYPE_FQDN:
1758 if (needcomma)
1759 ND_PRINT((ndo,", "));
1760 ND_PRINT((ndo,"DNS name"));
1761 cp = (const u_char *)(ni6 + 1) + 4;
1762 ND_TCHECK(cp[0]);
1763 if (cp[0] == ep - cp - 1) {
1764 /* icmp-name-lookup-03, pascal string */
1765 if (ndo->ndo_vflag)
1766 ND_PRINT((ndo,", 03 draft"));
1767 cp++;
1768 ND_PRINT((ndo,", \""));
1769 while (cp < ep) {
1770 safeputchar(ndo, *cp);
1771 cp++;
1772 }
1773 ND_PRINT((ndo,"\""));
1774 } else
1775 dnsname_print(ndo, cp, ep);
1776 if ((EXTRACT_16BITS(&ni6->ni_flags) & 0x01) != 0)
1777 ND_PRINT((ndo," [TTL=%u]", EXTRACT_32BITS(ni6 + 1)));
1778 break;
1779 case NI_QTYPE_NODEADDR:
1780 if (needcomma)
1781 ND_PRINT((ndo,", "));
1782 ND_PRINT((ndo,"node addresses"));
1783 i = sizeof(*ni6);
1784 while (i < siz) {
1785 if (i + sizeof(struct in6_addr) + sizeof(int32_t) > siz)
1786 break;
1787 ND_PRINT((ndo," %s", ip6addr_string(ndo, bp + i)));
1788 i += sizeof(struct in6_addr);
1789 ND_PRINT((ndo,"(%d)", (int32_t)EXTRACT_32BITS(bp + i)));
1790 i += sizeof(int32_t);
1791 }
1792 i = ni6->ni_flags;
1793 if (!i)
1794 break;
1795 ND_PRINT((ndo," [%s%s%s%s%s%s%s]",
1796 (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
1797 (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
1798 (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
1799 (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
1800 (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
1801 (i & NI_NODEADDR_FLAG_ALL) ? "A" : "",
1802 (i & NI_NODEADDR_FLAG_TRUNCATE) ? "T" : ""));
1803 break;
1804 default:
1805 if (needcomma)
1806 ND_PRINT((ndo,", "));
1807 ND_PRINT((ndo,"unknown"));
1808 break;
1809 }
1810
1811 /*(*/
1812 ND_PRINT((ndo,")"));
1813 break;
1814 }
1815 return;
1816
1817 trunc:
1818 ND_PRINT((ndo, "%s", icmp6_tstr));
1819 }
1820
1821 static void
1822 icmp6_rrenum_print(netdissect_options *ndo, const u_char *bp, const u_char *ep)
1823 {
1824 const struct icmp6_router_renum *rr6;
1825 const char *cp;
1826 const struct rr_pco_match *match;
1827 const struct rr_pco_use *use;
1828 char hbuf[NI_MAXHOST];
1829 int n;
1830
1831 if (ep < bp)
1832 return;
1833 rr6 = (const struct icmp6_router_renum *)bp;
1834 cp = (const char *)(rr6 + 1);
1835
1836 ND_TCHECK(rr6->rr_reserved);
1837 switch (rr6->rr_code) {
1838 case ICMP6_ROUTER_RENUMBERING_COMMAND:
1839 ND_PRINT((ndo,"router renum: command"));
1840 break;
1841 case ICMP6_ROUTER_RENUMBERING_RESULT:
1842 ND_PRINT((ndo,"router renum: result"));
1843 break;
1844 case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET:
1845 ND_PRINT((ndo,"router renum: sequence number reset"));
1846 break;
1847 default:
1848 ND_PRINT((ndo,"router renum: code-#%d", rr6->rr_code));
1849 break;
1850 }
1851
1852 ND_PRINT((ndo,", seq=%u", EXTRACT_32BITS(&rr6->rr_seqnum)));
1853
1854 if (ndo->ndo_vflag) {
1855 #define F(x, y) ((rr6->rr_flags) & (x) ? (y) : "")
1856 ND_PRINT((ndo,"[")); /*]*/
1857 if (rr6->rr_flags) {
1858 ND_PRINT((ndo,"%s%s%s%s%s,", F(ICMP6_RR_FLAGS_TEST, "T"),
1859 F(ICMP6_RR_FLAGS_REQRESULT, "R"),
1860 F(ICMP6_RR_FLAGS_FORCEAPPLY, "A"),
1861 F(ICMP6_RR_FLAGS_SPECSITE, "S"),
1862 F(ICMP6_RR_FLAGS_PREVDONE, "P")));
1863 }
1864 ND_PRINT((ndo,"seg=%u,", rr6->rr_segnum));
1865 ND_PRINT((ndo,"maxdelay=%u", EXTRACT_16BITS(&rr6->rr_maxdelay)));
1866 if (rr6->rr_reserved)
1867 ND_PRINT((ndo,"rsvd=0x%x", EXTRACT_32BITS(&rr6->rr_reserved)));
1868 /*[*/
1869 ND_PRINT((ndo,"]"));
1870 #undef F
1871 }
1872
1873 if (rr6->rr_code == ICMP6_ROUTER_RENUMBERING_COMMAND) {
1874 match = (const struct rr_pco_match *)cp;
1875 cp = (const char *)(match + 1);
1876
1877 ND_TCHECK(match->rpm_prefix);
1878
1879 if (ndo->ndo_vflag > 1)
1880 ND_PRINT((ndo,"\n\t"));
1881 else
1882 ND_PRINT((ndo," "));
1883 ND_PRINT((ndo,"match(")); /*)*/
1884 switch (match->rpm_code) {
1885 case RPM_PCO_ADD: ND_PRINT((ndo,"add")); break;
1886 case RPM_PCO_CHANGE: ND_PRINT((ndo,"change")); break;
1887 case RPM_PCO_SETGLOBAL: ND_PRINT((ndo,"setglobal")); break;
1888 default: ND_PRINT((ndo,"#%u", match->rpm_code)); break;
1889 }
1890
1891 if (ndo->ndo_vflag) {
1892 ND_PRINT((ndo,",ord=%u", match->rpm_ordinal));
1893 ND_PRINT((ndo,",min=%u", match->rpm_minlen));
1894 ND_PRINT((ndo,",max=%u", match->rpm_maxlen));
1895 }
1896 if (addrtostr6(&match->rpm_prefix, hbuf, sizeof(hbuf)))
1897 ND_PRINT((ndo,",%s/%u", hbuf, match->rpm_matchlen));
1898 else
1899 ND_PRINT((ndo,",?/%u", match->rpm_matchlen));
1900 /*(*/
1901 ND_PRINT((ndo,")"));
1902
1903 n = match->rpm_len - 3;
1904 if (n % 4)
1905 goto trunc;
1906 n /= 4;
1907 while (n-- > 0) {
1908 use = (const struct rr_pco_use *)cp;
1909 cp = (const char *)(use + 1);
1910
1911 ND_TCHECK(use->rpu_prefix);
1912
1913 if (ndo->ndo_vflag > 1)
1914 ND_PRINT((ndo,"\n\t"));
1915 else
1916 ND_PRINT((ndo," "));
1917 ND_PRINT((ndo,"use(")); /*)*/
1918 if (use->rpu_flags) {
1919 #define F(x, y) ((use->rpu_flags) & (x) ? (y) : "")
1920 ND_PRINT((ndo,"%s%s,",
1921 F(ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME, "V"),
1922 F(ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME, "P")));
1923 #undef F
1924 }
1925 if (ndo->ndo_vflag) {
1926 ND_PRINT((ndo,"mask=0x%x,", use->rpu_ramask));
1927 ND_PRINT((ndo,"raflags=0x%x,", use->rpu_raflags));
1928 if (~use->rpu_vltime == 0)
1929 ND_PRINT((ndo,"vltime=infty,"));
1930 else
1931 ND_PRINT((ndo,"vltime=%u,",
1932 EXTRACT_32BITS(&use->rpu_vltime)));
1933 if (~use->rpu_pltime == 0)
1934 ND_PRINT((ndo,"pltime=infty,"));
1935 else
1936 ND_PRINT((ndo,"pltime=%u,",
1937 EXTRACT_32BITS(&use->rpu_pltime)));
1938 }
1939 if (addrtostr6(&use->rpu_prefix, hbuf, sizeof(hbuf)))
1940 ND_PRINT((ndo,"%s/%u/%u", hbuf, use->rpu_uselen,
1941 use->rpu_keeplen));
1942 else
1943 ND_PRINT((ndo,"?/%u/%u", use->rpu_uselen,
1944 use->rpu_keeplen));
1945 /*(*/
1946 ND_PRINT((ndo,")"));
1947 }
1948 }
1949
1950 return;
1951
1952 trunc:
1953 ND_PRINT((ndo, "%s", icmp6_tstr));
1954 }
1955
1956 /*
1957 * Local Variables:
1958 * c-style: whitesmith
1959 * c-basic-offset: 8
1960 * End:
1961 */
DragonFly BSD